update thesis

Thesis.md

@@ -62,12 +62,14 @@ However, there remains a need to explore human-computer interaction patterns and
 >
 > - General content of the survey
 
-For this purpose, this paper presents a preliminary VR-based system for the simulation of ground rescue robots with four different modes of operation and corresponding test scenes imitating a post-disaster city. The test scene simulates a robot collaborating with Unity to construct a virtual 3D scene. The robot has a simulated radar, which makes the display of the scene dependent on the robot's movement. In order to find an interaction approach that is as intuitive and low mental fatigue as possible, a user study was executed after the development was completed.
+For this purpose, this paper presents a preliminary VR-based system for the simulation of ground rescue robots with four different modes of operation and corresponding test scenes imitating a post-disaster city. The test scene simulates a robot collaborating with Unity to construct a virtual 3D scene. The robot has a simulated LiDAR remote sensor, which makes the display of the scene dependent on the robot's movement. In order to find an interaction approach that is as intuitive and low mental fatigue as possible, a user study was executed after the development was completed.
 
 
 
 > ##### Paper Architecture
 
+Chapter \ref{related} talks about some of the research involving the integration of VR and human-computer interaction.
+
 Chapter \ref{*i*mplementation} provides details of the purposed system, including the techniques used for the different interaction modes and the structure of the test scenes.
 Chapter \ref{evaluate} will talk about the design and process of user study.
 
@@ -77,9 +79,14 @@ Finally, in Chapter \ref{conclusion}, conclusions and future work are summarized
 
 
 
-# (Related Work)
+# Related Work
+
+In this chapter, some research on the integration of VR and human-computer interaction will be discussed. The relevant literature and its contributions will be briefly presented. The topic of VR and human-computer integration is an open research with many kinds of focus perspectives.
+Robotic manipulation platforms combined with virtual worlds have several application scenarios. It can be used, for example, to train operators or to collaborate directly with real robots. Elias Matsas et al. \cite{Matsas:2017aa} provided a VR-based training system using hand recognition. Kinect cameras are used to capture the user's positions and motions, and virtual user models are constructed in the VR environment based on the collected data to operate robots as well as virtual objects, such as buttons. Users will learn how to operate the robot in a VR environment. The framework of VR purposed by Luis Pérez et al. \cite{Perez:2019ub} is applied to train operators to learn to control the robot. Since the environment does not need to change in real time, but rather needs to realistically recreate the factory scene, the VR scene here is not reconstructed in a way that it is captured and rendered in real time. Rather, a highly accurate 3D environment was reconstructed in advance using Blender after being captured with a 3D scanner.
 
+Building 3D scenes in virtual worlds based on information collected by robots is also a research highlight. Wang, et al. \cite{Wang:2017uy} were concerned with the visualization of the rescue robot and its surroundings in a virtual environment. The proposed human-robot interaction system uses incremental 3D-NDT map to render the robot's surroundings in real time. The user can view the robot's surroundings in a first-person view through the HTC-Vive and send control commands through the handle's arrow keys. The novel VR-based practical system provided by Patrick Stotko et al. \cite{Stotko:2019ud} uses distributed systems to reconstruct 3D scene. The data collected by the robot is fiest transmitted to the client responsible for reconstructing the scene. After the client has constructed the 3d scene, the set of actively reconstructed visible voxel blocks is sent to the server responsible for communication, which has a robot-based live telepresence and teleoperation system. This server will then broadcast the data back to the client used by the operator, thus enabling an immersive visualization of the robot within the scene.
 
+Others are more concerned about the manipulation of the robotic arm mounted on the robot. Moniri et al. \cite{Moniri:2016ud} provided a VR-based operating model for the robotic arm. The user wearing a headset can see a simulated 3D scene at the robot's end and send pickup commands to the remote robot by clicking on the target object with the mouse. The system proposed by Ostanin et al. \cite{Ostanin:2020uo} is worth mentioning. Although their proposed system for operating a robotic arm is based on mixed reality(MR), the article is highly relevant to this paper, considering the high relevance of MR and VR and the proposed system detailing the combination of ROS and robotics. In their system，the ROS Kinect was used as middleware and was responsible for communicating with the robot and the Unity side. The user can control the movement of the robot arm by selecting predefined options in the menu. In addition, the orbit and target points of the robot arm can be set by clicking on a hologram with a series of control points.
 
 # Implementation
 
@@ -94,7 +101,7 @@ In this chapter, the tools and techniques used in building this human-computer c
 > - the purpose of the unity project
 > - Components of the project: 4 operation modes & test Scene
 
-The main goal of this work is to design and implement a VR-based human-robot collaboration system with different methods of operating the robot in order to find out which method of operation is more suitable to be used to control the rescue robot. Further, it is to provide some basic insights for future development directions and to provide a general direction for finding an intuitive, easy-to-use and efficient operation method. Therefore, the proposed system was developed using Unity, including four modes of operation and a corresponding test environment for simulating post-disaster scenarios. In each operation mode, the user has a different method to control the robot. In addition, in order to better simulate the process by which the robot scans its surroundings and the computer side cumulatively gets a reconstructed 3D virtual scene, the test environment was implemented in such a way that the picture seen by the user depends on the direction of the robot's movement and the trajectory it travels through.
+The main goal of this work is to design and implement a VR-based human-robot collaboration system with different methods of operating the robot in order to find out which method of operation is more suitable to be used to control the rescue robot. Further, it is to provide some basic insights for future development directions and to provide a general direction for finding an intuitive, easy-to-use and efficient operation method. Therefore, the proposed system was developed using Unity, including four modes of operation and a corresponding test environment for simulating post-disaster scenarios. In each operation mode, the user has a different method to control the robot. In addition, in order to better simulate the process by which the robot scans its surroundings and the computer side cumulatively gets a reconstructed 3D virtual scene, the test environment was implemented in such a way that the picture seen by the user depends on the robot's movement and the trajectory it travels through.
 
 
 
@@ -126,7 +133,7 @@ Unity was chosen as the platform to develop the system. Unity is a widely used g
 >
 > information
 
-To simulate the process of a robot using a probe camera to detect the real environment and synchronise it to Unity, a conical collision body was set up on the robot. The robot will transform the Layers of the objects in the scene into visible Layers by collision detection and a trigger event (onTriggerEnter function). The robot's driving performance, such as the number of collisions, average speed, total distance, etc., will be recorded in each test. The detailed recorded information can be seen in Fig.\ref{fig:uml}. The movement of the robot depends on the value of the signal that is updated in each mode. In addition, the robot's Gameobject has the NavMeshAgent \footnote{https://docs.unity3d.com/ScriptReference/AI.NavMeshAgent.html} component, which supports the robot's navigation to the specified destination with automatic obstacle avoidance in the test scene. The virtual robot has three cameras. Each camera is set up in such a way that it can only see the area detected by the robot's radar and change the image bound to it in real time. The four operations described later all use the camera viewport as a monitoring screen by rendering the camera viewport on UI canvas.
+To simulate the process of a robot using a LiDAR remote sensor to detect the real environment and synchronise it to Unity, a sphere collision body was set up on the robot. The robot will transform the Layers of the objects in the scene into visible Layers by collision detection and a trigger event (onTriggerEnter function). The robot's driving performance, such as the number of collisions, average speed, total distance, etc., will be recorded in each test. The detailed recorded information can be seen in Fig.\ref{fig:uml}. The movement of the robot depends on the value of the signal that is updated in each mode. In addition, the robot's Gameobject has the NavMeshAgent \footnote{https://docs.unity3d.com/ScriptReference/AI.NavMeshAgent.html} component, which supports the robot's navigation to the specified destination with automatic obstacle avoidance in the test scene. The virtual robot has three cameras. One of the cameras is a simulation of a surveillance camera mounted on the robot, which can see all the items in the scene, although the distant items are not yet detected by LiDAR. Two of these camera are set up in such a way that they can only see the area detected by the robot's LiDAR remote sensor. Each camera captures what it sees and modifies the bound image bound in real time. The four operation modes described later all use the camera viewport as a monitoring screen by rendering the camera viewport on UI canvas.
 
 
 
@@ -162,14 +169,14 @@ In order to improve the reusability of the code and to facilitate the management
 > - functions: how to move robot, camera, map...
 > - photo
 
-In this mode, the user is controlling the robot's movement directly through the motion controller in the right hand. The touch pad of the motion controller determines the direction of rotation of the robot. The user can control the robot's driving speed by pulling the Trigger button. With the right-hand menu button, the surveillance screen around the robot can be turned on or off. The monitor window can be adjusted to a suitable position by dragging and rotating it. In the literature dealing with VR and human-computer collaboration, many researchers have used a similar operational approach. Therefore, as a widely used, and in a sense default operation approach, this mode was designed and became one of the proposed operation modes.
+In this mode, the user is controlling the robot's movement directly through the motion controller in the right hand. The touch pad of the motion controller determines the direction of rotation of the robot. The user can control the robot's driving speed by pulling the Trigger button. Fig.\ref{fig:htc} shows how to get the values from the HTC motion controller. The robot rotation direction will read the value of the touchpad X-axis. The range of values is $[-1,1]$. Forward speed reads the Trigger button passed in as a variable of type SteamVR_Action_Single, and the range of the variable is $[0,1]$. With the right-hand menu button, the surveillance screen around the robot can be turned on or off. The monitor window can be adjusted to a suitable position by dragging and rotating it. In the literature dealing with VR and human-computer collaboration, many researchers have used a similar operational approach. Therefore, as a widely used, and in a sense default operation approach, this mode was designed and became one of the proposed operation modes.
 
 ```latex
 \begin{figure}[h]
     \centering
-    \includegraphics[height=12cm]{graphics/htc controller.png}
-    \caption{HTC handle illustration. The robot rotation direction will read the value of the touchpad X-axis. The range of values is $[-1,1]$. Forward speed reads the Trigger button passed in as a variable of type SteamVR_Action_Single, and the range of the variable is $[0,1]$.}
-    \label{fig:uml}
+    \includegraphics[height=12cm]{graphics/htc.png}
+    \caption{HTC handle illustration. }
+    \label{fig:htc}
 \end{figure}
 ```
 
@@ -181,7 +188,7 @@ In this mode, the user is controlling the robot's movement directly through the
 > - functions: how to move robot, button, speed editor, auto drive 3 monitor....
 > - photo
 
-The original intention of designing this mode is that there is a part of the literature where the immersive human-robot collaborative framework are used to train operators how to operate the robot, avoiding risks and saving learning costs or directly as a platform for operating the robot \cite{Perez:2019ub}\cite{Matsas:2017vz}. Therefore, in this mode, a virtual laboratory environment is constructed, in which simulated buttons, controllers, and monitoring equipment are placed. The laboratory consists of two parts. The first part is the monitoring equipment: the monitoring screen is enlarged and placed at the front of the lab as a huge display. The second part is the operating console in the center of the laboratory, which can be moved by the user as desired. The user can use the buttons on the right side to lock the robot or let it walk forward automatically. In the middle of the console are two operating joysticks that determine the robot's forward motion and rotation respectively. The part that involves virtual joystick movement and button effects uses an open source github project VRtwix\footnote{https://github.com/rav3dev/vrtwix}. With the sliding stick on the left, the user can edit the speed of the robot's forward movement and rotation.
+The original intention of designing this mode is that there is a part of the literature where the immersive human-robot collaborative framework are used to train operators how to operate the robot, avoiding risks and saving learning costs or directly as a platform for operating the robot \cite{Perez:2019ub}\cite{Matsas:2017aa}. Therefore, in this mode, a virtual laboratory environment is constructed, in which simulated buttons, controllers, and monitoring equipment are placed. The laboratory consists of two parts. The first part is the monitoring equipment: the monitoring screen is enlarged and placed at the front of the lab as a huge display. The second part is the operating console in the center of the laboratory, which can be moved by the user as desired. The user can use the buttons on the right side to lock the robot or let it walk forward automatically. In the middle of the console are two operating joysticks that determine the robot's forward motion and rotation respectively. The part that involves virtual joystick movement and button effects uses an open source github project VRtwix\footnote{https://github.com/rav3dev/vrtwix}. With the sliding stick on the left, the user can edit the speed of the robot's forward movement and rotation.
 
 ##### 3. Remote Mode
 
@@ -189,6 +196,9 @@ The original intention of designing this mode is that there is a part of the lit
 > - functions: how to move robot: target(Pseudocode?) or virtural joystick. ItemPackage in Steam
 > - photo
 
+In this mode, the user can set the driving target point directly or control the robot by picking up the remote control that is placed on the toolbar. The target point is set by the ray emitted by the right motion controller. This process is similar to setting a teleportation point. After the target point is set, a square representing the destination is shown in the scene, and the robot will automatically travel to the set destination. The entire driving process uses the NavMeshAgent component and is therefore capable of automatic obstacle avoidance.
+By clicking on the menu button, a movable toolbar is opened with a remote control and a monitoring device. The remote control is a safety precaution in case the automatic navigation fails to navigate to the target point properly. The user can adjust the direction of the robot's travel by using the remote control. The pickup and auto-release parts use the ItemPackage component available in the SteamVR plugin.
+
 
 
 ##### 4. UI Mode
@@ -197,7 +207,7 @@ The original intention of designing this mode is that there is a part of the lit
 > - functions: introcude here compositions of the UI menu
 > - photo
 
-
+The virtual menu is also an interaction method that is often used in VR, so this mode is proposed. In this mode, the user must interact with the virtual menu using the ray emitted by the right motion controller. The virtual menu is set up with buttons for the direction of movement, speed controller, and buttons to open and close the monitor screen. In addition to this, an additional follow function is added to the menu, allowing the robot to follow the user's position in the virtual world. This is intended to let the user concentrate on observing the rendered VR environment. Also, having a real robot follow the user's location in the virtual world is a novel, unique human-machine integration mode in VR. The robot's automatic navigation uses the NavMeshAgent.
 
 
 
@@ -205,7 +215,7 @@ The original intention of designing this mode is that there is a part of the lit
 
 > - goal of the project: rescue robots  => destroyed city,
 > - environment:  destroyed city & Collider for test  [photo] 
-> - radar layer
+> - LiDAR layer
 
 In order to simulate the use of rescue robots in disaster scenarios, the test scenes were built to mimic the post-disaster urban environment as much as possible. The POLYGON Apocalypse\footnote{https://assetstore.unity.com/packages/3d/environments/urban/polygon-apocalypse-low-poly-3d-art-by-synty-154193}, available on the Unity Asset Store, is a low poly asset pack with a large number of models of buildings, streets, vehicles, etc. Using this resource pack as a base, additional collision bodies of the appropriate size were manually added to each building and obstacle after the pack was imported, which was needed to help track the robot's driving crash in subsequent tests.
 
@@ -221,13 +231,13 @@ The entire scene is initially invisible, and the visibility of each objects in t
 >
 > - Evaluate user experience and robot performance in different operating modes
 
-This chapter describes the design and detailed process of the user evaluation. The purpose of this user study is to measure the impact of four different modes of operation on rescue efficiency, robot driving performance, and psychological and physiological stress and fatigue, etc. For this purpose, participants are asked to find victims in a test scene using different modes of operation and to answer a questionnaire after the test corresponding to each mode of operation.
+This chapter describes the design and detailed process of the user evaluation. The purpose of this user study is to measure the impact of four different modes of operation on rescue efficiency, robot driving performance, and psychological and physiological stress and fatigue, etc. For this purpose, participants are asked to find victims in a test scene using different modes of operation and to answer questionnaires after the test corresponding to each mode of operation.
 
 
 
 ## Study Design
 
-The evaluation for each mode of operation consists of two main parts. The first part is the data recorded during the process of the participant driving the robot in the VR environment to find the victims. The recorded data includes information about the robot's collision and the speed of driving etc. The rescue of the victims was also considered as part of the evaluation. Besides the number of victims rescued, the number of victims who were already visible but neglected is also important data. The Official NASA Task Load Index (TLX) was used to measure the participants subjective workload asessments. Additionally, participants were asked specific questions for each mode of operation and were asked to select their favorite and least favorite modes of operation.
+The evaluation for each mode of operation consists of two main parts. The first part is the data recorded during the process of the participant driving the robot in the VR environment to find the victims. The recorded data includes information about the robot's collision and the speed of driving etc. The rescue of the victims was also considered as part of the evaluation. The Official NASA Task Load Index (TLX) was used to measure the participants subjective workload asessments. Additionally, participants were asked specific questions for each mode and were asked to select their favorite and least favorite operation mode. In order to reduce the influence of order effects on the testl results, the Balanced Latin Square was used when arranging the test order for the four operation modes.
 
 
 
@@ -246,30 +256,39 @@ Before the beginning of the actual testing process, participants were informed o
 ##### Entering the world of VR
 
 > 1. wear the headset
-> 2. familiar with the menu : switch & select mode(practice) & close
-> 3. change position : teleport & raise or lower
-> 4. rescue 1 victim
+>
+> 2. familiar with the basic VR action :
+>
+> 	- open & close Menu
+>
+> 	- change position : teleport & raise or lower
+>
+> 3. rescue 1 victim
 
-After the basic introduction part, participants would directly put on the VR headset and enter the VR environment to complete the rest of the tutorial. Considering that participants might not have experience with VR and that it would take time to learn how to operate the four different modes, the proposed system additionally sets up a practice pattern and places some models of victims in the practice scene. After entering the VR world, participants first needed to familiarize themselves with the opening and selecting options of the menu, as this involves switching between different modes and entering the test scenes. Then participants would use the motion controllers to try to teleport themselves, or raise themselves into mid-air. Finally participants were asked to interact with the victim model through virtual hands. After this series of general tutorials, participants were already generally familiar with the use of VR and how to move around in the VR world.
+After the basic introduction part, participants would directly put on the VR headset and enter the VR environment to complete the rest of the tutorial. Considering that participants might not have experience with VR and that it would take time to learn how to operate the four different modes, the proposed system additionally sets up a practice pattern and places some models of victims in the practice scene. After entering the VR world, participants first needed to familiarize themselves with the opening and closing menu, as well as useing the motion controllers to try to teleport themselves, or raise themselves into mid-air. Finally participants were asked to interact with the victim model through virtual hands. After this series of general tutorials, participants were already generally familiar with the use of VR and how to move around in the VR world.
 
 
 
 ##### Practice and evaluation of modes
 
 > 1. `foreach Mode`:
-> 	1. enter mode(practice)
-> 	2. try to move the robot
-> 	3. try to rescue 1-2 victims
-> 	4. enter test scene
-> 	5. -testing- 
-> 	6. Fill out the questionnaire: google form + TLX
+> 	1. practice
+> 		- try to move the robot
+> 		- try to rescue 1-2 victims
+> 	2. enter test scene
+> 	3. -testing- 
+> 	4. Fill out the questionnaire: google form + TLX
 >
 > 2. summary part of google form: 
 > 	- like/dislike most
 > 	- reason 
 > 	- feedback
 
-Given the different manipulation approaches for each mode, in order to avoid confusion between the different modes, participants would then take turns practicing and directly evaluating each mode immediately afterwards. The participant first switched to the mode of operation to be tested and manipulated the robot to move in that mode. After attempting to rescue 1-2 victim models and the participant indicated that he or she was familiar enough with this operation mode, the participant would enter the test scene. In the test scene, participants had to save as many victims as possible in a given time limit. Participants were required to move the robot around the test scene to explore the post-disaster city and to find and rescue victims. In this process, if the robot crashes with buildings, obstacles, etc., besides the collision information being recorded as test data, participants would also receive sound and vibration feedback. The test will automatically end when time runs out or when all the victims in the scene have been rescued. Participants were required to complete the evaluation questionnaire and the NASA evaluation form at the end of each test. This process was repeated in each mode of operation. 
+Given the different manipulation approaches for each mode, in order to avoid confusion between the different modes, participants would then take turns practicing and directly evaluating each mode immediately afterwards. 
+
+The sequence of modes to be tested  is predetermined. The order effect is an important factor affecting the test results. If the order of the operational modes to be tested was the same for each participant, the psychological and physical exhaustion caused by the last operation mode would inevitably be greater. In order to minimize the influence of the order effect on the results of the test, the Balanced Latin Square with the size of four was used to arrange the test order of the four operation modes.
+
+Participants automatically entered the practice scene corresponding to the relevant operation mode in the predefined order. After attempting to rescue 1-2 victim models and the participant indicated that he or she was familiar enough with this operation mode, the participant would enter the test scene. In the test scene, participants had to save as many victims as possible in a given time limit. Participants were required to move the robot around the test scene to explore the post-disaster city and to find and rescue victims. In this process, if the robot crashes with buildings, obstacles, etc., besides the collision information being recorded as test data, participants would also receive sound and vibration feedback. The test will automatically end when time runs out or when all the victims in the scene have been rescued. Participants were required to complete the evaluation questionnaire and the NASA evaluation form at the end of each test. This process was repeated in each mode of operation. 
 
 After all the tests were completed, participants were asked to compare the four operation modes and select the one they liked the most and the one they liked the least. In addition, participants could give their reasons for the choice and express their opinions as much as they wanted, such as suggestions for improvement or problems found during operation.
 
@@ -311,4 +330,5 @@ After all the tests were completed, participants were asked to compare the four
 >
 > - communication with ROS
 > - Real Robots
-> - Use real scene: reconstructed 3D model based on the daten from robot sensors
+> - Use real scene: reconstructed 3D model based on the daten from robot sensors
+

Thesis_LaTeX/BibTexDatei.bib

@@ -1,13 +1,32 @@
 %% This BibTeX bibliography file was created using BibDesk.
 %% https://bibdesk.sourceforge.io/
 
-%% Created for 夜未央 at 2021-07-01 15:35:33 +0200 
+%% Created for 夜未央 at 2021-07-04 13:54:41 +0200 
 
 
 %% Saved with string encoding Unicode (UTF-8) 
 
 
 
+@article{Matsas:2017aa,
+	abstract = {This paper presents a highly interactive and immersive Virtual Reality Training System (VRTS) (``beWare of the Robot'') in terms of a serious game that simulates in real-time the cooperation between industrial robotic manipulators and humans, executing simple manufacturing tasks. The scenario presented refers to collaborative handling in tape-laying for building aerospace composite parts. The tools, models and techniques developed and used to build the ``beWare of the Robot''application are described. System setup and configuration are presented in detail, as well as user tracking and navigation issues. Special emphasis is given to the interaction techniques used to facilitate implementation of virtual human--robot (HR) collaboration. Safety issues, such as contacts and collisions are mainly tackled through ``emergencies'', i.e. warning signals in terms of visual stimuli and sound alarms. Mental safety is of utmost priority and the user is provided augmented situational awareness and enhanced perception of the robot's motion due to immersion and real-time interaction offered by the VRTS as well as by special warning stimuli. The short-term goal of the research was to investigate users'enhanced experience and behaviour inside the virtual world while cooperating with the robot and positive pertinent preliminary findings are presented and briefly discussed. In the longer term, the system can be used to investigate acceptability of H--R collaboration and, ultimately, serve as a platform for programming collaborative H--R manufacturing cells.},
+	author = {Matsas, Elias and Vosniakos, George-Christopher},
+	da = {2017/05/01},
+	date-added = {2021-07-04 13:54:19 +0200},
+	date-modified = {2021-07-04 13:54:19 +0200},
+	doi = {10.1007/s12008-015-0259-2},
+	id = {Matsas2017},
+	isbn = {1955-2505},
+	journal = {International Journal on Interactive Design and Manufacturing (IJIDeM)},
+	number = {2},
+	pages = {139--153},
+	title = {Design of a virtual reality training system for human--robot collaboration in manufacturing tasks},
+	ty = {JOUR},
+	url = {https://doi.org/10.1007/s12008-015-0259-2},
+	volume = {11},
+	year = {2017},
+	Bdsk-Url-1 = {https://doi.org/10.1007/s12008-015-0259-2}}
+
 @book{Stotko:2019ud,
 	author = {Stotko, Patrick and Krumpen, Stefan and Schwarz, Max and Lenz, Christian and Behnke, Sven and Klein, Reinhard and Weinmann, Michael},
 	date = {2019/11/01},
@@ -396,19 +415,6 @@
 	year1 = {2020},
 	Bdsk-Url-1 = {https://doi.org/10.1080/0951192X.2019.1690685}}
 
-@article{Matsas:2017vz,
-	author = {Matsas, Elias and Vosniakos, George-Christopher},
-	date = {2017},
-	date-added = {2021-06-02 14:34:55 +0200},
-	date-modified = {2021-06-02 14:34:55 +0200},
-	journal = {International Journal on Interactive Design and Manufacturing (IJIDeM)},
-	number = {2},
-	pages = {139-153 %@ 1955-2513},
-	publisher = {Springer},
-	title = {Design of a virtual reality training system for human--robot collaboration in manufacturing tasks},
-	volume = {11},
-	year = {2017}}
-
 @article{SOARES20151656,
 	abstract = {The remote handling (RH) plays an important role in nuclear test facilities, such as in ITER, for in-vessel and ex-vessel maintenance operations. Unexpected situations may occur when RH devices fail. Since no human being is allowed during the RH operations, a Multi-purpose Rescue Vehicle (MPRV) must be required for providing support in site. This paper proposes a design of a MPRV, i.e., a mobile platform equipped with different sensors and two manipulators with different sets of end-effectors. A human--machine interface is also proposed to remotely operate the MPRV and to carry out rescue and recovery operations.},
 	author = {Jo{\~a}o Soares and Alberto Vale and Rodrigo Ventura},

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Thesis_LaTeX/Thesis_Jingyi.bbl

@@ -766,6 +766,249 @@
       \verb 10.1109/CAC.2017.8243836
       \endverb
     \endentry
+    \entry{Matsas:2017aa}{article}{}
+      \name{author}{2}{}{%
+        {{hash=aa1ca691cd4a3c881b245f9e8af506a3}{%
+           family={Matsas},
+           familyi={M\bibinitperiod},
+           given={Elias},
+           giveni={E\bibinitperiod}}}%
+        {{hash=964c3c81b9720a9f9b35ab5d6770f3a2}{%
+           family={Vosniakos},
+           familyi={V\bibinitperiod},
+           given={George-Christopher},
+           giveni={G\bibinithyphendelim C\bibinitperiod}}}%
+      }
+      \strng{namehash}{c7a15625feb988f401822db815aed1d9}
+      \strng{fullhash}{c7a15625feb988f401822db815aed1d9}
+      \strng{bibnamehash}{c7a15625feb988f401822db815aed1d9}
+      \strng{authorbibnamehash}{c7a15625feb988f401822db815aed1d9}
+      \strng{authornamehash}{c7a15625feb988f401822db815aed1d9}
+      \strng{authorfullhash}{c7a15625feb988f401822db815aed1d9}
+      \field{sortinit}{1}
+      \field{sortinithash}{4f6aaa89bab872aa0999fec09ff8e98a}
+      \field{labelnamesource}{author}
+      \field{labeltitlesource}{title}
+      \field{abstract}{This paper presents a highly interactive and immersive Virtual Reality Training System (VRTS) (``beWare of the Robot'') in terms of a serious game that simulates in real-time the cooperation between industrial robotic manipulators and humans, executing simple manufacturing tasks. The scenario presented refers to collaborative handling in tape-laying for building aerospace composite parts. The tools, models and techniques developed and used to build the ``beWare of the Robot''application are described. System setup and configuration are presented in detail, as well as user tracking and navigation issues. Special emphasis is given to the interaction techniques used to facilitate implementation of virtual human--robot (HR) collaboration. Safety issues, such as contacts and collisions are mainly tackled through ``emergencies'', i.e. warning signals in terms of visual stimuli and sound alarms. Mental safety is of utmost priority and the user is provided augmented situational awareness and enhanced perception of the robot's motion due to immersion and real-time interaction offered by the VRTS as well as by special warning stimuli. The short-term goal of the research was to investigate users'enhanced experience and behaviour inside the virtual world while cooperating with the robot and positive pertinent preliminary findings are presented and briefly discussed. In the longer term, the system can be used to investigate acceptability of H--R collaboration and, ultimately, serve as a platform for programming collaborative H--R manufacturing cells.}
+      \field{isbn}{1955-2505}
+      \field{journaltitle}{International Journal on Interactive Design and Manufacturing (IJIDeM)}
+      \field{number}{2}
+      \field{title}{Design of a virtual reality training system for human--robot collaboration in manufacturing tasks}
+      \field{volume}{11}
+      \field{year}{2017}
+      \field{pages}{139\bibrangedash 153}
+      \range{pages}{15}
+      \verb{doi}
+      \verb 10.1007/s12008-015-0259-2
+      \endverb
+      \verb{urlraw}
+      \verb https://doi.org/10.1007/s12008-015-0259-2
+      \endverb
+      \verb{url}
+      \verb https://doi.org/10.1007/s12008-015-0259-2
+      \endverb
+    \endentry
+    \entry{Perez:2019ub}{article}{}
+      \name{author}{4}{}{%
+        {{hash=758632de20f8819be2d06cd9fb54ce3f}{%
+           family={Pérez},
+           familyi={P\bibinitperiod},
+           given={Luis},
+           giveni={L\bibinitperiod}}}%
+        {{hash=d1cf8f2b0d80080b7fd4cb8b878703d4}{%
+           family={Diez},
+           familyi={D\bibinitperiod},
+           given={Eduardo},
+           giveni={E\bibinitperiod}}}%
+        {{hash=2d4a1692d5dec8545ffb0f671bc76b34}{%
+           family={Usamentiaga},
+           familyi={U\bibinitperiod},
+           given={Rubén},
+           giveni={R\bibinitperiod}}}%
+        {{hash=4ac126b84d6f38bd8d62979d308c378b}{%
+           family={Garcı́a},
+           familyi={G\bibinitperiod},
+           given={Daniel\bibnamedelima F.},
+           giveni={D\bibinitperiod\bibinitdelim F\bibinitperiod}}}%
+      }
+      \strng{namehash}{afd1f7a72016ac4257bd84049d59ed11}
+      \strng{fullhash}{381f97873c358835a8d186af720f6d3e}
+      \strng{bibnamehash}{afd1f7a72016ac4257bd84049d59ed11}
+      \strng{authorbibnamehash}{afd1f7a72016ac4257bd84049d59ed11}
+      \strng{authornamehash}{afd1f7a72016ac4257bd84049d59ed11}
+      \strng{authorfullhash}{381f97873c358835a8d186af720f6d3e}
+      \field{sortinit}{1}
+      \field{sortinithash}{4f6aaa89bab872aa0999fec09ff8e98a}
+      \field{labelnamesource}{author}
+      \field{labeltitlesource}{title}
+      \field{abstract}{Nowadays, we are involved in the fourth industrial revolution, commonly referred to as ``Industry 4.0,''where cyber-physical systems and intelligent automation, including robotics, are the keys. Traditionally, the use of robots has been limited by safety and, in addition, some manufacturing tasks are too complex to be fully automated. Thus, human-robot collaborative applications, where robots are not isolated, are necessary in order to increase the productivity ensuring the safety of the operators with new perception systems for the robot and new interaction interfaces for the human. Moreover, virtual reality has been extended to the industry in the last years, but most of its applications are not related to robots. In this context, this paper works on the synergies between virtual reality and robotics, presenting the use of commercial gaming technologies to create a totally immersive environment based on virtual reality. This environment includes an interface connected to the robot controller, where the necessary mathematical models have been implemented for the control of the virtual robot. The proposed system can be used for training, simulation, and what is more innovative, for robot controlling in an integrated, non-expensive and unique application. Results show that the immersive experience increments the efficiency of the training and simulation processes, offering a cost-effective solution.}
+      \field{isbn}{0166-3615}
+      \field{journaltitle}{Computers in Industry}
+      \field{title}{Industrial robot control and operator training using virtual reality interfaces}
+      \field{volume}{109}
+      \field{year}{2019}
+      \field{pages}{114\bibrangedash 120}
+      \range{pages}{7}
+      \verb{doi}
+      \verb https://doi.org/10.1016/j.compind.2019.05.001
+      \endverb
+      \verb{urlraw}
+      \verb https://www.sciencedirect.com/science/article/pii/S0166361518308546
+      \endverb
+      \verb{url}
+      \verb https://www.sciencedirect.com/science/article/pii/S0166361518308546
+      \endverb
+      \keyw{Robots; Virtual reality; Human-machine interface; Virtual manufacturing; Industry 4.0}
+    \endentry
+    \entry{Stotko:2019ud}{book}{}
+      \name{author}{7}{}{%
+        {{hash=a5adb02efccd0a8f6facf03ad6526673}{%
+           family={Stotko},
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+           given={Patrick},
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+        {{hash=83ee01374e4d644d739e4382e249dcf8}{%
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+        {{hash=3fac57dfc6c43c66bebe18d4ff8873ad}{%
+           family={Weinmann},
+           familyi={W\bibinitperiod},
+           given={Michael},
+           giveni={M\bibinitperiod}}}%
+      }
+      \strng{namehash}{2181d290cc02b5140bf79ff0aabf85a4}
+      \strng{fullhash}{813e44226b2a71da22f44e910b806b8f}
+      \strng{bibnamehash}{2181d290cc02b5140bf79ff0aabf85a4}
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+      \field{sortinit}{2}
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+      \field{labeltitlesource}{title}
+      \field{month}{11}
+      \field{title}{A VR System for Immersive Teleoperation and Live Exploration with a Mobile Robot}
+      \field{year}{2019}
+      \verb{doi}
+      \verb 10.1109/IROS40897.2019.8968598
+      \endverb
+      \warn{\item Entry 'Stotko:2019ud' (BibTexDatei.bib): Invalid format '2019/11/01' of date field 'date' - ignoring}
+    \endentry
+    \entry{Moniri:2016ud}{inproceedings}{}
+      \name{author}{4}{}{%
+        {{hash=b249a8ff2846d2fce417998d16be7d09}{%
+           family={Moniri},
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+        {{hash=90eade11523d9865cc41c8ff27c760f9}{%
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+      }
+      \strng{namehash}{23a55dcc813e53ff96b34db2df809206}
+      \strng{fullhash}{473ca9b76bcbc60848f42a8e1b023420}
+      \strng{bibnamehash}{23a55dcc813e53ff96b34db2df809206}
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+      \field{sortinit}{2}
+      \field{sortinithash}{8b555b3791beccb63322c22f3320aa9a}
+      \field{labelnamesource}{author}
+      \field{labeltitlesource}{title}
+      \field{booktitle}{2016 12th International Conference on Intelligent Environments (IE)}
+      \field{isbn}{2472-7571}
+      \field{journaltitle}{2016 12th International Conference on Intelligent Environments (IE)}
+      \field{title}{Human Gaze and Focus-of-Attention in Dual Reality Human-Robot Collaboration}
+      \field{year}{2016}
+      \field{pages}{238\bibrangedash 241}
+      \range{pages}{4}
+      \verb{doi}
+      \verb 10.1109/IE.2016.54
+      \endverb
+    \endentry
+    \entry{Ostanin:2020uo}{inproceedings}{}
+      \name{author}{5}{}{%
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+      \field{labeltitlesource}{title}
+      \field{booktitle}{2020 IEEE International Conference on Robotics and Automation (ICRA)}
+      \field{isbn}{2577-087X}
+      \field{journaltitle}{2020 IEEE International Conference on Robotics and Automation (ICRA)}
+      \field{title}{Human-robot interaction for robotic manipulator programming in Mixed Reality}
+      \field{year}{2020}
+      \field{pages}{2805\bibrangedash 2811}
+      \range{pages}{7}
+      \verb{doi}
+      \verb 10.1109/ICRA40945.2020.9196965
+      \endverb
+    \endentry
     \entry{Whitney:2018wk}{inproceedings}{}
       \name{author}{5}{}{%
         {{hash=f9acc463c0cf522bcb3d8fef1242c47a}{%
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-      \field{sortinit}{1}
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+      \field{sortinit}{2}
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       \field{labelnamesource}{author}
       \field{labeltitlesource}{title}
       \field{booktitle}{2018 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)}

Thesis_LaTeX/Thesis_Jingyi.bcf

@@ -2360,7 +2360,15 @@
     <bcf:citekey order="14">Villani:2018ub</bcf:citekey>
     <bcf:citekey order="15">Liu:2017tw</bcf:citekey>
     <bcf:citekey order="16">Wang:2017uy</bcf:citekey>
-    <bcf:citekey order="17">Whitney:2018wk</bcf:citekey>
+    <bcf:citekey order="17">Matsas:2017aa</bcf:citekey>
+    <bcf:citekey order="18">Perez:2019ub</bcf:citekey>
+    <bcf:citekey order="19">Wang:2017uy</bcf:citekey>
+    <bcf:citekey order="20">Stotko:2019ud</bcf:citekey>
+    <bcf:citekey order="21">Moniri:2016ud</bcf:citekey>
+    <bcf:citekey order="22">Ostanin:2020uo</bcf:citekey>
+    <bcf:citekey order="23">Whitney:2018wk</bcf:citekey>
+    <bcf:citekey order="24">Perez:2019ub</bcf:citekey>
+    <bcf:citekey order="25">Matsas:2017aa</bcf:citekey>
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   <bcf:sortingtemplate name="none">

Thesis_LaTeX/Thesis_Jingyi.blg

@@ -1,27 +1,32 @@
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-[62] biber-darwin:340> INFO - === Thu Jul  1, 2021, 12:33:05
-[74] Biber.pm:415> INFO - Reading 'Thesis_Jingyi.bcf'
-[152] Biber.pm:952> INFO - Found 17 citekeys in bib section 0
-[164] Biber.pm:4340> INFO - Processing section 0
-[172] Biber.pm:4531> INFO - Looking for bibtex format file 'BibTexDatei.bib' for section 0
-[176] bibtex.pm:1689> INFO - LaTeX decoding ...
-[214] bibtex.pm:1494> INFO - Found BibTeX data source 'BibTexDatei.bib'
-[233] Utils.pm:395> WARN - ISBN '1941-0492' in entry 'Casper:2003tk' is invalid - run biber with '--validate_datamodel' for details.
-[254] Utils.pm:395> WARN - ISBN '2153-0866' in entry 'Murphy:2012th' is invalid - run biber with '--validate_datamodel' for details.
-[258] Utils.pm:395> WARN - ISBN '0197-7385' in entry 'Huang:2011wq' is invalid - run biber with '--validate_datamodel' for details.
-[260] Utils.pm:395> WARN - ISBN '1558-2442' in entry 'Murphy:2004wl' is invalid - run biber with '--validate_datamodel' for details.
-[280] Utils.pm:395> WARN - Entry 'Sousa:2017tn' (BibTexDatei.bib): Invalid format '2017/10/18' of date field 'date' - ignoring
-[288] Utils.pm:395> WARN - ISBN '2153-0866' in entry 'Nagi:2014vu' is invalid - run biber with '--validate_datamodel' for details.
-[292] Utils.pm:395> WARN - ISBN '2153-0866' in entry 'Pourmehr:2013ta' is invalid - run biber with '--validate_datamodel' for details.
-[296] Utils.pm:395> WARN - ISBN '1558-2531' in entry 'Ma:2015wu' is invalid - run biber with '--validate_datamodel' for details.
-[303] Utils.pm:395> WARN - ISBN '1944-9437' in entry 'Villani:2018ub' is invalid - run biber with '--validate_datamodel' for details.
-[307] Utils.pm:395> WARN - ISBN '1944-9437' in entry 'Liu:2017tw' is invalid - run biber with '--validate_datamodel' for details.
-[317] Utils.pm:395> WARN - ISBN '2153-0866' in entry 'Whitney:2018wk' is invalid - run biber with '--validate_datamodel' for details.
-[332] UCollate.pm:68> INFO - Overriding locale 'en-US' defaults 'variable = shifted' with 'variable = non-ignorable'
-[332] UCollate.pm:68> INFO - Overriding locale 'en-US' defaults 'normalization = NFD' with 'normalization = prenormalized'
-[332] Biber.pm:4168> INFO - Sorting list 'none/global//global/global' of type 'entry' with template 'none' and locale 'en-US'
-[332] Biber.pm:4174> INFO - No sort tailoring available for locale 'en-US'
-[343] bbl.pm:654> INFO - Writing 'Thesis_Jingyi.bbl' with encoding 'UTF-8'
-[354] bbl.pm:757> INFO - Output to Thesis_Jingyi.bbl
-[354] Biber.pm:128> INFO - WARNINGS: 11
+[87] biber-darwin:340> INFO - === Sun Jul  4, 2021, 16:59:40
+[104] Biber.pm:415> INFO - Reading 'Thesis_Jingyi.bcf'
+[197] Biber.pm:952> INFO - Found 22 citekeys in bib section 0
+[211] Biber.pm:4340> INFO - Processing section 0
+[221] Biber.pm:4531> INFO - Looking for bibtex format file 'BibTexDatei.bib' for section 0
+[225] bibtex.pm:1689> INFO - LaTeX decoding ...
+[274] bibtex.pm:1494> INFO - Found BibTeX data source 'BibTexDatei.bib'
+[303] Utils.pm:395> WARN - ISBN '1941-0492' in entry 'Casper:2003tk' is invalid - run biber with '--validate_datamodel' for details.
+[327] Utils.pm:395> WARN - ISBN '2153-0866' in entry 'Murphy:2012th' is invalid - run biber with '--validate_datamodel' for details.
+[333] Utils.pm:395> WARN - ISBN '0197-7385' in entry 'Huang:2011wq' is invalid - run biber with '--validate_datamodel' for details.
+[336] Utils.pm:395> WARN - ISBN '1558-2442' in entry 'Murphy:2004wl' is invalid - run biber with '--validate_datamodel' for details.
+[369] Utils.pm:395> WARN - Entry 'Sousa:2017tn' (BibTexDatei.bib): Invalid format '2017/10/18' of date field 'date' - ignoring
+[382] Utils.pm:395> WARN - ISBN '2153-0866' in entry 'Nagi:2014vu' is invalid - run biber with '--validate_datamodel' for details.
+[387] Utils.pm:395> WARN - ISBN '2153-0866' in entry 'Pourmehr:2013ta' is invalid - run biber with '--validate_datamodel' for details.
+[392] Utils.pm:395> WARN - ISBN '1558-2531' in entry 'Ma:2015wu' is invalid - run biber with '--validate_datamodel' for details.
+[402] Utils.pm:395> WARN - ISBN '1944-9437' in entry 'Villani:2018ub' is invalid - run biber with '--validate_datamodel' for details.
+[407] Utils.pm:395> WARN - ISBN '1944-9437' in entry 'Liu:2017tw' is invalid - run biber with '--validate_datamodel' for details.
+[421] Utils.pm:395> WARN - ISBN '1955-2505' in entry 'Matsas:2017aa' is invalid - run biber with '--validate_datamodel' for details.
+[426] Utils.pm:395> WARN - ISBN '0166-3615' in entry 'Perez:2019ub' is invalid - run biber with '--validate_datamodel' for details.
+[436] Utils.pm:395> WARN - Entry 'Stotko:2019ud' (BibTexDatei.bib): Invalid format '2019/11/01' of date field 'date' - ignoring
+[444] Utils.pm:395> WARN - ISBN '2472-7571' in entry 'Moniri:2016ud' is invalid - run biber with '--validate_datamodel' for details.
+[451] Utils.pm:395> WARN - ISBN '2577-087X' in entry 'Ostanin:2020uo' is invalid - run biber with '--validate_datamodel' for details.
+[457] Utils.pm:395> WARN - ISBN '2153-0866' in entry 'Whitney:2018wk' is invalid - run biber with '--validate_datamodel' for details.
+[482] UCollate.pm:68> INFO - Overriding locale 'en-US' defaults 'normalization = NFD' with 'normalization = prenormalized'
+[482] UCollate.pm:68> INFO - Overriding locale 'en-US' defaults 'variable = shifted' with 'variable = non-ignorable'
+[482] Biber.pm:4168> INFO - Sorting list 'none/global//global/global' of type 'entry' with template 'none' and locale 'en-US'
+[482] Biber.pm:4174> INFO - No sort tailoring available for locale 'en-US'
+[503] bbl.pm:654> INFO - Writing 'Thesis_Jingyi.bbl' with encoding 'UTF-8'
+[522] bbl.pm:757> INFO - Output to Thesis_Jingyi.bbl
+[522] Biber.pm:128> INFO - WARNINGS: 16

Thesis_LaTeX/Thesis_Jingyi.fdb_latexmk

@@ -1,13 +1,13 @@
 # Fdb version 3
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-  "Thesis_Jingyi.bcf" 1625135599 106912 702bf6176148abbc2b1924486424ccbf "lualatex"
+["biber Thesis_Jingyi"] 1625410778 "Thesis_Jingyi.bcf" "Thesis_Jingyi.bbl" "Thesis_Jingyi" 1625410802
+  "BibTexDatei.bib" 1625399681 23523 46c59dd3f19db39c137bfdfd0fb31b72 ""
+  "Thesis_Jingyi.bcf" 1625410801 107357 0b8a06157e3a60fdee0766d0fe5d1a87 "lualatex"
   (generated)
-  "Thesis_Jingyi.bbl"
   "Thesis_Jingyi.blg"
-["lualatex"] 1625135595 "/Users/elaine/Desktop/Hector_Unity_v2.0/Thesis_LaTeX/Thesis_Jingyi.tex" "/Users/elaine/Desktop/Hector_Unity_v2.0/Thesis_LaTeX/Thesis_Jingyi.pdf" "Thesis_Jingyi" 1625135600
-  "/Users/elaine/Desktop/Hector_Unity_v2.0/Thesis_LaTeX/Thesis_Jingyi.aux" 1625135599 16512 c36e27cc918bb87c8061f2e5afb42ea8 ""
-  "/Users/elaine/Desktop/Hector_Unity_v2.0/Thesis_LaTeX/Thesis_Jingyi.tex" 1625069396 3410 e307d17b3cc34441d48ac04a84c1f17a ""
+  "Thesis_Jingyi.bbl"
+["lualatex"] 1625410794 "/Users/elaine/Desktop/Thesis-Hector-VR/Thesis_LaTeX/Thesis_Jingyi.tex" "/Users/elaine/Desktop/Thesis-Hector-VR/Thesis_LaTeX/Thesis_Jingyi.pdf" "Thesis_Jingyi" 1625410802
+  "/Users/elaine/Desktop/Thesis-Hector-VR/Thesis_LaTeX/Thesis_Jingyi.aux" 1625410801 18337 5a511f02aa52aaff87194fabd24d7cba ""
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@@ -71,6 +71,9 @@
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@@ -146,6 +149,7 @@
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   "/usr/local/texlive/2021/texmf-dist/tex/latex/etoolbox/etoolbox.sty" 1601931149 46845 3b58f70c6e861a13d927bff09d35ecbc ""
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@@ -209,6 +213,8 @@
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   "/usr/local/texlive/2021/texmf-dist/tex/latex/roboto/roboto.sty" 1576101225 14885 1a5132fb349578b9a7edd65f7ff1d141 ""
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   (generated)
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+  "/Users/elaine/Desktop/Thesis-Hector-VR/Thesis_LaTeX/Thesis_Jingyi.pdf"
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   "pdfa.xmpi"
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   "Thesis_Jingyi.aux"
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   "Thesis_Jingyi.out"
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+  "Thesis_Jingyi.run.xml"
+  "Thesis_Jingyi.pdf"
   "Thesis_Jingyi.toc"

Thesis_LaTeX/Thesis_Jingyi.fls

@@ -1,7 +1,7 @@
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+PWD /Users/elaine/Desktop/Thesis-Hector-VR/Thesis_LaTeX
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+INPUT /Users/elaine/Desktop/Thesis-Hector-VR/Thesis_LaTeX/Thesis_Jingyi.tex
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Thesis_LaTeX/Thesis_Jingyi.tex

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-\contentsline {section}{\numberline {3.3}Robot}{8}{section.3.3}%
+\contentsline {section}{\numberline {4.2}System Architecture}{9}{section.4.2}%
 \defcounter {refsection}{0}\relax 
-\contentsline {section}{\numberline {3.4}Interaction techniques}{8}{section.3.4}%
+\contentsline {section}{\numberline {4.3}Robot}{10}{section.4.3}%
 \defcounter {refsection}{0}\relax 
-\contentsline {subsection}{\numberline {3.4.1}Handle Mode}{10}{subsection.3.4.1}%
+\contentsline {section}{\numberline {4.4}Interaction techniques}{10}{section.4.4}%
 \defcounter {refsection}{0}\relax 
-\contentsline {subsection}{\numberline {3.4.2}Lab Mode}{10}{subsection.3.4.2}%
+\contentsline {subsection}{\numberline {4.4.1}Handle Mode}{11}{subsection.4.4.1}%
 \defcounter {refsection}{0}\relax 
-\contentsline {subsection}{\numberline {3.4.3}Remote Mode}{10}{subsection.3.4.3}%
+\contentsline {subsection}{\numberline {4.4.2}Lab Mode}{11}{subsection.4.4.2}%
 \defcounter {refsection}{0}\relax 
-\contentsline {subsection}{\numberline {3.4.4}UI Mode}{10}{subsection.3.4.4}%
+\contentsline {subsection}{\numberline {4.4.3}Remote Mode}{13}{subsection.4.4.3}%
 \defcounter {refsection}{0}\relax 
-\contentsline {section}{\numberline {3.5}Test Scene}{10}{section.3.5}%
+\contentsline {subsection}{\numberline {4.4.4}UI Mode}{13}{subsection.4.4.4}%
 \defcounter {refsection}{0}\relax 
-\contentsline {chapter}{\numberline {4}Evaluation of User Experience}{11}{chapter.4}%
+\contentsline {section}{\numberline {4.5}Test Scene}{14}{section.4.5}%
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-\contentsline {section}{\numberline {4.1}Study Design}{11}{section.4.1}%
+\contentsline {chapter}{\numberline {5}Evaluation of User Experience}{15}{chapter.5}%
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-\contentsline {section}{\numberline {4.2}Procedure}{11}{section.4.2}%
+\contentsline {section}{\numberline {5.1}Study Design}{15}{section.5.1}%
 \defcounter {refsection}{0}\relax 
-\contentsline {section}{\numberline {4.3}Entering the world of VR}{11}{section.4.3}%
+\contentsline {section}{\numberline {5.2}Procedure}{15}{section.5.2}%
 \defcounter {refsection}{0}\relax 
-\contentsline {section}{\numberline {4.4}Practice and evaluation of modes}{12}{section.4.4}%
+\contentsline {section}{\numberline {5.3}Entering the world of VR}{15}{section.5.3}%
 \defcounter {refsection}{0}\relax 
-\contentsline {chapter}{\numberline {5}Results}{13}{chapter.5}%
+\contentsline {section}{\numberline {5.4}Practice and evaluation of modes}{16}{section.5.4}%
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-\contentsline {chapter}{\numberline {6}Conclusion and future work}{14}{chapter.6}%
+\contentsline {chapter}{\numberline {6}Results}{17}{chapter.6}%
+\defcounter {refsection}{0}\relax 
+\contentsline {chapter}{\numberline {7}Conclusion and future work}{18}{chapter.7}%
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Thesis_LaTeX/chapters/evaluate.tex

@@ -2,13 +2,12 @@
 \label{evaluate}
 
 
-This chapter describes the design and detailed process of the user evaluation. The purpose of this user study is to measure the impact of four different modes of operation on rescue efficiency, robot driving performance, and psychological and physiological stress and fatigue, etc. For this purpose, participants are asked to find victims in a test scene using different modes of operation and to answer a questionnaire after the test corresponding to each mode of operation.
-
+This chapter describes the design and detailed process of the user evaluation. The purpose of this user study is to measure the impact of four different modes of operation on rescue efficiency, robot driving performance, and psychological and physiological stress and fatigue, etc. For this purpose, participants are asked to find victims in a test scene using different modes of operation and to answer questionnaires after the test corresponding to each mode of operation.
 
 
 \section{Study Design}
 
-The evaluation for each mode of operation consists of two main parts. The first part is the data recorded during the process of the participant driving the robot in the VR environment to find the victims. The recorded data includes information about the robot's collision and the speed of driving etc. The rescue of the victims was also considered as part of the evaluation. Besides the number of victims rescued, the number of victims who were already visible but neglected is also important data. The Official NASA Task Load Index (TLX) was used to measure the participants subjective workload asessments. Additionally, participants were asked specific questions for each mode of operation and were asked to select their favorite and least favorite modes of operation.
+The evaluation for each mode of operation consists of two main parts. The first part is the data recorded during the process of the participant driving the robot in the VR environment to find the victims. The recorded data includes information about the robot's collision and the speed of driving etc. The rescue of the victims was also considered as part of the evaluation. The Official NASA Task Load Index (TLX) was used to measure the participants subjective workload asessments. Additionally, participants were asked specific questions for each mode and were asked to select their favorite and least favorite operation mode. In order to reduce the influence of order effects on the testl results, the Balanced Latin Square was used when arranging the test order for the four operation modes.
 
 
 
@@ -18,11 +17,16 @@ Before the beginning of the actual testing process, participants were informed o
 
 
 \section{Entering the world of VR}
-After the basic introduction part, participants would directly put on the VR headset and enter the VR environment to complete the rest of the tutorial. Considering that participants might not have experience with VR and that it would take time to learn how to operate the four different modes, the proposed system additionally sets up a practice pattern and places some models of victims in the practice scene. After entering the VR world, participants first needed to familiarize themselves with the opening and selecting options of the menu, as this involves switching between different modes and entering the test scenes. Then participants would use the motion controllers to try to teleport themselves, or raise themselves into mid-air. Finally participants were asked to interact with the victim model through virtual hands. After this series of general tutorials, participants were already generally familiar with the use of VR and how to move around in the VR world.
+After the basic introduction part, participants would directly put on the VR headset and enter the VR environment to complete the rest of the tutorial. Considering that participants might not have experience with VR and that it would take time to learn how to operate the four different modes, the proposed system additionally sets up a practice pattern and places some models of victims in the practice scene. After entering the VR world, participants first needed to familiarize themselves with the opening and closing menu, as well as useing the motion controllers to try to teleport themselves, or raise themselves into mid-air. Finally participants were asked to interact with the victim model through virtual hands. After this series of general tutorials, participants were already generally familiar with the use of VR and how to move around in the VR world.
 
 
 
 \section{Practice and evaluation of modes}
-Given the different manipulation approaches for each mode, in order to avoid confusion between the different modes, participants would then take turns practicing and directly evaluating each mode immediately afterwards. The participant first switched to the mode of operation to be tested and manipulated the robot to move in that mode. After attempting to rescue 1-2 victim models and the participant indicated that he or she was familiar enough with this operation mode, the participant would enter the test scene. In the test scene, participants had to save as many victims as possible in a given time limit. Participants were required to move the robot around the test scene to explore the post-disaster city and to find and rescue victims. In this process, if the robot crashes with buildings, obstacles, etc., besides the collision information being recorded as test data, participants would also receive sound and vibration feedback. The test will automatically end when time runs out or when all the victims in the scene have been rescued. Participants were required to complete the evaluation questionnaire and the NASA evaluation form at the end of each test. This process was repeated in each mode of operation. 
+Given the different manipulation approaches for each mode, in order to avoid confusion between the different modes, participants would then take turns practicing and directly evaluating each mode immediately afterwards. 
+
+The sequence of modes to be tested  is predetermined. The order effect is an important factor affecting the test results. If the order of the operational modes to be tested was the same for each participant, the psychological and physical exhaustion caused by the last operation mode would inevitably be greater. In order to minimize the influence of the order effect on the results of the test, the Balanced Latin Square with the size of four was used to arrange the test order of the four operation modes.
+
+Participants automatically entered the practice scene corresponding to the relevant operation mode in the predefined order. After attempting to rescue 1-2 victim models and the participant indicated that he or she was familiar enough with this operation mode, the participant would enter the test scene. In the test scene, participants had to save as many victims as possible in a given time limit. Participants were required to move the robot around the test scene to explore the post-disaster city and to find and rescue victims. In this process, if the robot crashes with buildings, obstacles, etc., besides the collision information being recorded as test data, participants would also receive sound and vibration feedback. The test will automatically end when time runs out or when all the victims in the scene have been rescued. Participants were required to complete the evaluation questionnaire and the NASA evaluation form at the end of each test. This process was repeated in each mode of operation. 
 
 After all the tests were completed, participants were asked to compare the four operation modes and select the one they liked the most and the one they liked the least. In addition, participants could give their reasons for the choice and express their opinions as much as they wanted, such as suggestions for improvement or problems found during operation.
+

Thesis_LaTeX/chapters/implementation.tex

@@ -6,16 +6,15 @@ In this chapter, the tools and techniques used in building this human-computer c
 
 
 \section{Overview}
-The main goal of this work is to design and implement a VR-based human-robot collaboration system with different methods of operating the robot in order to find out which method of operation is more suitable to be used to control the rescue robot. Further, it is to provide some basic insights for future development directions and to provide a general direction for finding an intuitive, easy-to-use and efficient operation method. Therefore, the proposed system was developed using Unity, including four modes of operation and a corresponding test environment for simulating post-disaster scenarios. In each operation mode, the user has a different method to control the robot. In addition, in order to better simulate the process by which the robot scans its surroundings and the computer side cumulatively gets a reconstructed 3D virtual scene, the test environment was implemented in such a way that the picture seen by the user depends on the direction of the robot's movement and the trajectory it travels through.
-
+The main goal of this work is to design and implement a VR-based human-robot collaboration system with different methods of operating the robot in order to find out which method of operation is more suitable to be used to control the rescue robot. Further, it is to provide some basic insights for future development directions and to provide a general direction for finding an intuitive, easy-to-use and efficient operation method. Therefore, the proposed system was developed using Unity, including four modes of operation and a corresponding test environment for simulating post-disaster scenarios. In each operation mode, the user has a different method to control the robot. In addition, in order to better simulate the process by which the robot scans its surroundings and the computer side cumulatively gets a reconstructed 3D virtual scene, the test environment was implemented in such a way that the picture seen by the user depends on the robot's movement and the trajectory it travels through.
 
 \section{System Architecture}
 The proposed system runs on a computer with the Windows 10 operating system. This computer has been equipped with an Intel Core i7-8700K CPU, 32 GB RAM as well as a NVIDIA GTX 1080 GPU with 8 GB VRAM. HTC Vive is used as a VR device. It has a resolution of 1080 × 1200 per eye, resulting in a total resolution of 2160 × 1200 pixels, a refresh rate of 90 Hz, and a field of view of 110 degrees. It includes two motion controllers and uses two Lighthouses to track the position of the headset as well as the motion controllers.
 
-Unity was chosen as the platform to develop the system. Unity is a widely used game engine with a Steam VR plugin \footnote{https://assetstore.unity.com/packages/tools/integration/steamvr-plugin-32647}, which allows developers to focus on the VR environment and interactive behaviors in programming, rather than specific controller buttons and headset positioning, making VR development much simpler. Another reason why Unity was chosen as a development platform was the potential for collaboration with the Robot Operating System (ROS), a frequently used operating system for robot simulation and manipulation, which is flexible, low-coupling, distributed, open source, and has a powerful and rich third-party feature set. In terms of collaboration between Unity and ROS, Siemens provides open source software libraries and tools in C\# for communicating with ROS from .NET applications \footnote{https://github.com/siemens/ros-sharp}. Combining ROS and Unity to develop a collaborative human-robot interaction platform proved to be feasible\cite{Whitney:2018wk}. Since the focus of this paper is on human-robot interaction, collaboration and synchronization of ROS will not be explored in detail here.
+Unity was chosen as the platform to develop the system. Unity is a widely used game engine with a Steam VR plugin \footnote{https://assetstore.unity.com/packages/tools/integration/steamvr-plugin-32647}, which allows developers to focus on the VR environment and interactive behaviors in programming, rather than specific controller buttons and headset positioning, making VR development much simpler. Another reason why Unity was chosen as a development platform was the potential for collaboration with the Robot Operating System (ROS), a frequently used operating system for robot simulation and manipulation, which is flexible, low-coupling, distributed, open source, and has a powerful and rich third-party feature set. In terms of collaboration between Unity and ROS, Siemens provides open source software libraries and tools in C\# for communicating with ROS from .NET applications \footnote{https://github.com/siemens/ros-sharp}. Combining ROS and Unity to develop a collaborative human-robot interaction platform proved to be feasible \cite{Whitney:2018wk}. Since the focus of this paper is on human-robot interaction, collaboration and synchronization of ROS will not be explored in detail here.
 
 \section{Robot}
-To simulate the process of a robot using a probe camera to detect the real environment and synchronise it to Unity, a conical collision body was set up on the robot. The robot will transform the Layers of the objects in the scene into visible Layers by collision detection and a trigger event (onTriggerEnter function). The robot's driving performance, such as the number of collisions, average speed, total distance, etc., will be recorded in each test. The detailed recorded information can be seen in Fig.\ref{fig:uml}. The movement of the robot depends on the value of the signal that is updated in each mode. In addition, the robot's Gameobject has the NavMeshAgent \footnote{https://docs.unity3d.com/ScriptReference/AI.NavMeshAgent.html} component, which supports the robot's navigation to the specified destination with automatic obstacle avoidance in the test scene. The virtual robot has three cameras. Each camera is set up in such a way that it can only see the area detected by the robot's radar and change the image bound to it in real time. The four operations described later all use the camera viewport as a monitoring screen by rendering the camera viewport on UI canvas.
+To simulate the process of a robot using a LiDAR remote sensor to detect the real environment and synchronise it to Unity, a sphere collision body was set up on the robot. The robot will transform the Layers of the objects in the scene into visible Layers by collision detection and a trigger event (onTriggerEnter function). The robot's driving performance, such as the number of collisions, average speed, total distance, etc., will be recorded in each test. The detailed recorded information can be seen in Fig.\ref{fig:uml}. The movement of the robot depends on the value of the signal that is updated in each mode. In addition, the robot's Gameobject has the NavMeshAgent \footnote{https://docs.unity3d.com/ScriptReference/AI.NavMeshAgent.html} component, which supports the robot's navigation to the specified destination with automatic obstacle avoidance in the test scene. The virtual robot has three cameras. One of the cameras is a simulation of a surveillance camera mounted on the robot, which can see all the items in the scene, although the distant items are not yet detected by LiDAR. Two of these camera are set up in such a way that they can only see the area detected by the robot's LiDAR remote sensor. Each camera captures what it sees and modifies the bound image bound in real time. The four operation modes described later all use the camera viewport as a monitoring screen by rendering the camera viewport on UI canvas.
 
 
 \section{Interaction techniques}
@@ -30,21 +29,38 @@ This system has 4 different approaches to control the robot. Each mode has its o
 
 In order to improve the reusability of the code and to facilitate the management of subsequent development, the classes that manage the interaction actions of each mode implement the same interface. A graphical representation of the system structure is given in the UML activity diagram in Fig.\ref{fig:uml}.
 
-\begin{figure}[h]
+\begin{figure}[htbp]
     \centering
-    \includegraphics[height=12cm]{graphics/uml.png}
+    \includegraphics[width=\textwidth]{graphics/uml.png}
     \caption{UML Class diagram for the main structure of the system}
     \label{fig:uml}
 \end{figure}
 
 \subsection{Handle Mode}
+In this mode, the user is controlling the robot's movement directly through the motion controller in the right hand. The touch pad of the motion controller determines the direction of rotation of the robot. The user can control the robot's driving speed by pulling the Trigger button. Fig.\ref{fig:htc} shows how to get the values from the HTC motion controller. The robot rotation direction will read the value of the touchpad X-axis. The range of values is $[-1,1]$. Forward speed reads the Trigger button passed in as a variable of type SteamVR\_Action\_Single, and the range of the variable is $[0,1]$. With the right-hand menu button, the surveillance screen around the robot can be turned on or off. The monitor window can be adjusted to a suitable position by dragging and rotating it. In the literature dealing with VR and human-computer collaboration, many researchers have used a similar operational approach. Therefore, as a widely used, and in a sense default operation approach, this mode was designed and became one of the proposed operation modes.
+
+\begin{figure}[htbp]
+    \centering
+	\includegraphics[height=10cm]{graphics/htc.png}
+	\caption{HTC handle illustration.}
+	\label{fig:htc}
+\end{figure}
+
 \subsection{Lab Mode}
+The original intention of designing this mode is that there is a part of the literature where the immersive human-robot collaborative framework are used to train operators how to operate the robot, avoiding risks and saving learning costs or directly as a platform for operating the robot \cite{Perez:2019ub}\cite{Matsas:2017aa}. Therefore, in this mode, a virtual laboratory environment is constructed, in which simulated buttons, controllers, and monitoring equipment are placed. The laboratory consists of two parts. The first part is the monitoring equipment: the monitoring screen is enlarged and placed at the front of the lab as a huge display. The second part is the operating console in the center of the laboratory, which can be moved by the user as desired. The user can use the buttons on the right side to lock the robot or let it walk forward automatically. In the middle of the console are two operating joysticks that determine the robot's forward motion and rotation respectively. The part that involves virtual joystick movement and button effects uses an open source github project VRtwix\footnote{https://github.com/rav3dev/vrtwix}. With the sliding stick on the left, the user can edit the speed of the robot's forward movement and rotation.
+
 \subsection{Remote Mode}
+In this mode, the user can set the driving target point directly or control the robot by picking up the remote control that is placed on the toolbar. The target point is set by the ray emitted by the right motion controller. This process is similar to setting a teleportation point. After the target point is set, a square representing the destination is shown in the scene, and the robot will automatically travel to the set destination. The entire driving process uses the NavMeshAgent component and is therefore capable of automatic obstacle avoidance.
+By clicking on the menu button, a movable toolbar is opened with a remote control and a monitoring device. The remote control is a safety precaution in case the automatic navigation fails to navigate to the target point properly. The user can adjust the direction of the robot's travel by using the remote control. The pickup and auto-release parts use the ItemPackage component available in the SteamVR plugin.
+
+
+
 \subsection{UI Mode}
+The virtual menu is also an interaction method that is often used in VR, so this mode is proposed. In this mode, the user must interact with the virtual menu using the ray emitted by the right motion controller. The virtual menu is set up with buttons for the direction of movement, speed controller, and buttons to open and close the monitor screen. In addition to this, an additional follow function is added to the menu, allowing the robot to follow the user's position in the virtual world. This is intended to let the user concentrate on observing the rendered VR environment. Also, having a real robot follow the user's location in the virtual world is a novel, unique human-machine integration mode in VR. The robot's automatic navigation uses the NavMeshAgent.
 
 
 \section{Test Scene}
-In order to simulate the use of rescue robots in disaster scenarios, the test scenes were built to mimic the post-disaster urban environment as much as possible. The POLYGON Apocalypse\footnote{https://assetstore.unity.com/packages/3d/environments/urban/polygon-apocalypse-low-poly-3d-art-by-synty-154193}, available on the Unity Asset Store, is a low poly asset pack with a large number of models of buildings, streets, vehicles, etc. Using this resource pack as a base, additional collision bodies of the appropriate size were manually added to each building and obstacle after the pack was imported, which was needed to help track the robot's driving crash in subsequent tests.
+In order to simulate the use of rescue robots in disaster scenarios, the test scenes were built to mimic the post-disaster urban environment as much as possible. The POLYGON Apocalypse \footnote{https://assetstore.unity.com/packages/3d/environments/urban/polygon-apocalypse-low-poly-3d-art-by-synty-154193}, available on the Unity Asset Store, is a low poly asset pack with a large number of models of buildings, streets, vehicles, etc. Using this resource pack as a base, additional collision bodies of the appropriate size were manually added to each building and obstacle after the pack was imported, which was needed to help track the robot's driving crash in subsequent tests.
 
 Considering that there are four modes of operation to be tested, four scenes with similar complexity, similar composition of buildings but different road conditions and placement of buildings were constructed. The similarity in complexity of the scenes ensures that the difficulty of the four tests is basically identical. The different scene setups ensure that the scene information learned by the user after one test will not make him understand the next test scene and thus affect the accuracy of the test data. 
 

Thesis_LaTeX/chapters/introduction.tex

@@ -17,12 +17,11 @@ The use of VR in human-computer collaboration also has the potential. In terms o
 However, there remains a need to explore human-computer interaction patterns and improve the level of human-computer integration\cite{Wang:2017uy}. Intuitive and easy-to-use interaction patterns can enable the user to explore the environment as intentionally as possible and improve the efficiency of search and rescue. The appropriate interaction method should cause less mental and physical exhaustion, which also extends the length of an operation, making it less necessary for the user to frequently exit the VR environment for rest.
 
 % What I have done (overview)
-For this purpose, this paper presents a preliminary VR-based system for the simulation of ground rescue robots with four different modes of operation and corresponding test scenes imitating a post-disaster city. The test scene simulates a robot collaborating with Unity to construct a virtual 3D scene. The robot has a simulated radar, which makes the display of the scene dependent on the robot's movement.
-In order to find an interaction approach that is as intuitive and low mental fatigue as possible, a user study was executed after the development was completed.
-
+For this purpose, this paper presents a preliminary VR-based system for the simulation of ground rescue robots with four different modes of operation and corresponding test scenes imitating a post-disaster city. The test scene simulates a robot collaborating with Unity to construct a virtual 3D scene. The robot has a simulated LiDAR remote sensor, which makes the display of the scene dependent on the robot's movement. In order to find an interaction approach that is as intuitive and low mental fatigue as possible, a user study was executed after the development was completed.
 
 
 % Paper Architecture
+Chapter \ref{related} talks about some of the research involving the integration of VR and human-computer interaction.
 Chapter \ref{implementation} provides details of the purposed system, including the techniques used for the different interaction modes and the structure of the test scenes.
 Chapter \ref{evaluate} will talk about the design and process of user study.
 Chapter \ref{result} presents the results of the user study and analyzes the advantages and disadvantages of the different modes of operation and the directions for improvement.

Thesis_LaTeX/chapters/related_work.tex

@@ -1 +1,10 @@
 \chapter{Related Work}
+\label{related}
+
+In this chapter, some research on the integration of VR and human-computer interaction will be discussed. The relevant literature and its contributions will be briefly presented. The topic of VR and human-computer integration is an open research with many kinds of focus perspectives.
+
+Robotic manipulation platforms combined with virtual worlds have several application scenarios. It can be used, for example, to train operators or to collaborate directly with real robots. Elias Matsas et al. \cite{Matsas:2017aa} provided a VR-based training system using hand recognition. Kinect cameras are used to capture the user's positions and motions, and virtual user models are constructed in the VR environment based on the collected data to operate robots as well as virtual objects, such as buttons. Users will learn how to operate the robot in a VR environment. The framework of VR purposed by Luis Pérez et al. \cite{Perez:2019ub} is applied to train operators to learn to control the robot. Since the environment does not need to change in real time, but rather needs to realistically recreate the factory scene, the VR scene here is not reconstructed in a way that it is captured and rendered in real time. Rather, a highly accurate 3D environment was reconstructed in advance using Blender after being captured with a 3D scanner.
+
+Building 3D scenes in virtual worlds based on information collected by robots is also a research highlight. Wang, et al. \cite{Wang:2017uy} were concerned with the visualization of the rescue robot and its surroundings in a virtual environment. The proposed human-robot interaction system uses incremental 3D-NDT map to render the robot's surroundings in real time. The user can view the robot's surroundings in a first-person view through the HTC-Vive and send control commands through the handle's arrow keys. The novel VR-based practical system provided by Patrick Stotko et al. \cite{Stotko:2019ud} uses distributed systems to reconstruct 3D scene. The data collected by the robot is fiest transmitted to the client responsible for reconstructing the scene. After the client has constructed the 3d scene, the set of actively reconstructed visible voxel blocks is sent to the server responsible for communication, which has a robot-based live telepresence and teleoperation system. This server will then broadcast the data back to the client used by the operator, thus enabling an immersive visualization of the robot within the scene.
+
+Others are more concerned about the manipulation of the robotic arm mounted on the robot. Moniri et al. \cite{Moniri:2016ud} provided a VR-based operating model for the robotic arm. The user wearing a headset can see a simulated 3D scene at the robot's end and send pickup commands to the remote robot by clicking on the target object with the mouse. The system proposed by Ostanin et al. \cite{Ostanin:2020uo} is worth mentioning. Although their proposed system for operating a robotic arm is based on mixed reality(MR), the article is highly relevant to this paper, considering the high relevance of MR and VR and the proposed system detailing the combination of ROS and robotics. In their system，the ROS Kinect was used as middleware and was responsible for communicating with the robot and the Unity side. The user can control the movement of the robot arm by selecting predefined options in the menu. In addition, the orbit and target points of the robot arm can be set by clicking on a hologram with a series of control points.

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