scholarly journals Design of Augmented Reality Training Content for Railway Vehicle Maintenance Focusing on the Axle-Mounted Disc Brake System

2021 ◽  
Vol 11 (19) ◽  
pp. 9090
Author(s):  
Hwi-Jin Kwon ◽  
Seung-Il Lee ◽  
Ju-Hyung Park ◽  
Chul-Su Kim
Keyword(s):  
Augmented Reality ◽  
Human Error ◽  
Warning Signs ◽  
Three Dimensions ◽  
Brake System ◽  
Railway Vehicle ◽  
Disc Brake ◽  
System Usability Scale ◽  
Training Content ◽  
Training Efficiency

Light maintenance training for electric multiple-unit components of the organization of railway operations is generally conducted using maintenance manuals and work videos, following the guidelines of each organization. These manuals are in the form of booklets, complicated and inconvenient for maintenance operators to carry. Therefore, training content that visualizes maintenance procedures in a three-dimensions (3D) space is necessary to overcome the drawbacks of booklet-type training. In this study, we developed augmented reality (AR)-based training content for railway vehicle maintenance to increase training efficiency. Providing warning signs for risky procedures reduces human error, and transparency control makes trainees check the product hierarchy. A virtual experience based on the maintenance manual is provided to improve maintenance proficiency. An axle-mounted disc brake system maintenance manual is implemented in AR to reflect the requirements of maintenance operators. The convenience of this tool is improved by loading the AR content on a mobile device. Two methods of verification were used: the system usability scale (SUS) survey and training efficiency evaluation. The resulting SUS grade was B (excellent), and the training efficiency improved by 34%.

scholarly journals Building Information Modeling Methods for Post-Earthquake Retrofitting Visualization of Buildings Using Augmented Reality

2021 ◽  
Vol 11 (12) ◽  
pp. 5739
Author(s):  
Zhansheng Liu ◽  
Wenyan Bai
Keyword(s):  
Augmented Reality ◽  
Building Information Modeling ◽  
Repair Process ◽  
Information Modeling ◽  
Three Dimensions ◽  
Visualization Process ◽  
Building Information ◽  
Key Factor ◽  
Technical Solutions ◽  
Seismic Resilience

The post-earthquake retrofitting and repair process of a building is a key factor in improving its seismic capability. A thorough understanding of retrofitting methods and processes will aid in repairing post-earthquake buildings and improving seismic resilience. This study aims to develop a visualization framework for the post-earthquake retrofitting of buildings which builds models based on building information modeling (BIM) and realizes visualization using augmented reality (AR). First, multi-level representation methods and coding criteria are used to process the models for a damaged member. Then, an information collection template is designed for integrating multi-dimensional information, such as damage information, retrofitting methods, technical solutions, and construction measures. Subsequently, a BIM model is presented in three dimensions (3D) using AR. Finally, the visualization process is tested through experiments, which demonstrate the feasibility of using the framework to visualize the post-earthquake retrofitting of a building.

scholarly journals Three-dimensional CFD modeling of thermal behavior of a disc brake and pad for an automobile

2020 ◽  
Vol 15 (4) ◽  
pp. 543-549
Author(s):  
Haydar Kepekci ◽  
Ergin Kosa ◽  
Cüneyt Ezgi ◽  
Ahmet Cihan
Keyword(s):  
Cast Iron ◽  
Friction Coefficient ◽  
Elevated Temperatures ◽  
Gray Cast Iron ◽  
Three Dimensional ◽  
Brake System ◽  
Gray Cast ◽  
Cfd Modeling ◽  
Disc Brake ◽  
Disc Material

Abstract The brake system of an automobile is composed of disc brake and pad which are co-working components in braking and accelerating. In the braking period, due to friction between the surface of the disc and pad, the thermal heat is generated. It should be avoided to reach elevated temperatures in disc and pad. It is focused on different disc materials that are gray cast iron and carbon ceramics, whereas pad is made up of a composite material. In this study, the CFD model of the brake system is analyzed to get a realistic approach in the amount of transferred heat. The amount of produced heat can be affected by some parameters such as velocity and friction coefficient. The results show that surface temperature for carbon-ceramic disc material can change between 290 and 650 K according to the friction coefficient and velocity in transient mode. Also, if the disc material gray cast iron is selected, it can change between 295 and 500 K. It is claimed that the amount of dissipated heat depends on the different heat transfer coefficient of gray cast iron and carbon ceramics.

Simulation and Simulation Software Development of the Braking Process of a Subway Train

2014 ◽  
Vol 556-562 ◽  
pp. 294-301 ◽  
Author(s):  
Long Han ◽  
Chun Tian ◽  
Yan Wang ◽  
Meng Ling Wu ◽  
Zhuo Jun Luo
Keyword(s):  
Computational Effort ◽  
Simulation Software ◽  
System Model ◽  
Brake System ◽  
Railway Vehicle ◽  
Model Parameters ◽  
Modeling Process ◽  
Time Simulation ◽  
Subway Train ◽  
Braking Process

This paper deals with the problem of braking process modeling. A subway train braking process simulation software is built, which composes of a GUI and a underlying model. The underlying model consists of a train model and a brake system model. The train model is simplified and built by assembling subcomponent element models of a railway vehicle. The brake system model is simplified and built based on experimental data in order to reduce computational effort. The GUI of the software can be use to input model parameters, display simulation results, and store simulation data. As a result of the simplifications of the modeling process, the developed software can perform real time simulation.

scholarly journals A web application to involve patients in the medication reconciliation process: a user-centered usability and usefulness study

2018 ◽  
Vol 25 (11) ◽  
pp. 1488-1500
Author(s):  
Sophie Marien ◽  
Delphine Legrand ◽  
Ravi Ramdoyal ◽  
Jimmy Nsenga ◽  
Gustavo Ospina ◽  
...  
Keyword(s):  
Web Application ◽  
Medication Reconciliation ◽  
Qualitative Data ◽  
Improve Patient Safety ◽  
Three Dimensions ◽  
Medication List ◽  
Medication History ◽  
Medication Discrepancies ◽  
System Usability Scale ◽  
User Centered

Abstract Objective Medication reconciliation (MedRec) can improve patient safety by resolving medication discrepancies. Because information technology (IT) and patient engagement are promising approaches to optimizing MedRec, the SEAMPAT project aims to develop a MedRec IT platform based on two applications: the “patient app” and the “MedRec app.” This study evaluates three dimensions of the usability (efficiency, satisfaction, and effectiveness) and usefulness of the patient app. Methods We performed a four-month user-centered observational study. Quantitative and qualitative data were collected. Participants completed the system usability scale (SUS) questionnaire and a second questionnaire on usefulness. Effectiveness was assessed by measuring the completeness of the medication list generated by the patient application and its correctness (ie medication discrepancies between the patient list and the best possible medication history). Qualitative data were collected from semi-structured interviews, observations and comments, and questions raised by patients. Results Forty-two patients completed the study. Sixty-nine percent of patients considered the patient app to be acceptable (SUS Score ≥ 70) and usefulness was high. The medication list was complete for a quarter of the patients (7/28) and there was a discrepancy for 21.7% of medications (21/97). The qualitative data enabled the identification of several barriers (related to functional and non-functional aspects) to the optimization of usability and usefulness. Conclusions Our findings highlight the importance and value of user-centered usability testing of a patient application implemented in “real-world” conditions. To achieve adoption and sustained use by patients, the app should meet patients’ needs while also efficiently improving the quality of MedRec.

Case Study: Enhancing Human Reliability With Artificial Intelligence and Augmented Reality Tools for Nuclear Maintenance

2018 ◽  
Author(s):  
Geoffrey Momin ◽  
Raj Panchal ◽  
Daniel Liu ◽  
Sharman Perera
Keyword(s):  
Augmented Reality ◽  
Real Time ◽  
Human Error ◽  
Nuclear Industry ◽  
Industrial Accidents ◽  
Worker Productivity ◽  
Energy Agency ◽  
Computer Mediated ◽  
Critical Feedback

Human error accounts for about 60% of the annual power loss due to maintenance incidents in the fossil power industry. The International Atomic Energy Agency reports that 80\% of industrial accidents in the nuclear industry can be attributed to human error and 20\% to equipment failure. The Personal Augmented Reality Reference System (PARRS) is a suite of computer-mediated reality applications that looks to minimize human error by digitizing manual procedures and providing real-time monitoring of hazards present in an environment. Our mission is to be able to provide critical feedback to inform personnel in real-time and protect them from avoidable hazards. PARRS aims to minimize human error and increase worker productivity by bringing innovation to safety and procedural compliance by leveraging technologies such as augmented reality, LiDAR, computer machine learning and particulate mapping using remote systems.

Influences of Initial DTV on Thermomechnical Coupling in Disc Brake System

2017 ◽  
Author(s):  
Dejian Meng ◽  
Ziyi Wang ◽  
Lijun Zhang ◽  
Zhuoping Yu
Keyword(s):  
Brake System ◽  
Disc Brake

scholarly journals AGV Brake System Simulation

2019 ◽  
Vol 10 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Daniel Varecha ◽  
Robert Kohar ◽  
Frantisek Brumercik
Keyword(s):  
Mathematical Model ◽  
Input Data ◽  
Initial Conditions ◽  
Brake System ◽  
Disc Brake ◽  
Hydraulic Control ◽  
Stopping Distance ◽  
Braking Force ◽  
Braking Process ◽  
The Mathematical Model

Abstract The article is focused on braking simulation of automated guided vehicle (AGV). The brake system is used with a disc brake and with hydraulic control. In the first step, the formula necessary for braking force at the start of braking is derived. The stopping distance is 1.5 meters. Subsequently, a mathematical model of braking is created into which the formula of the necessary braking force is applied. The mathematical model represents a motion equation that is solved in the software Matlab by an approximation method. Next a simulation is created using Matlab software and the data of simulation are displayed in the graph. The transport speed of the vehicle is 1 〖m.s〗^(-1) and the weight of the vehicle is 6000 kg including load. The aim of this article is to determine the braking time of the device depending from the input data entered, which represent the initial conditions of the braking process.

scholarly journals PENGEMBANGAN APLIKASI MOBILE PENGENALAN ALAT MUSIK TRADISIONAL BETAWI DENGAN MEMANFAATKAN TEKNOLOGI AUGMENTED REALITY

2020 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Dendi Ismi Sofian ◽  
Achmad Syarief ◽  
Acep Iwan Saidi
Keyword(s):  
Augmented Reality ◽  
System Design ◽  
Interactive Multimedia ◽  
Musical Instruments ◽  
Multimedia System ◽  
Design Development ◽  
System Usability Scale ◽  
System Usability ◽  
Grade Scale ◽  
Interactive Multimedia System

<br /><div>The existence of traditional musical instruments, especially Betawi, is increasingly disappearing, eroded by modern life and a global lifestyle that is more adopting Western musical instruments with  all its conveniences. One effort that can be done is to develop an application using augmented reality  technology. This research will focus on developing augmented reality applications using a mix approach  approach, which is a merger of qualitative and quantitative approaches. Whereas in the application<br />development process, the method of designing Interactive Multimedia System Design Development  (IMSDD) was developed. This application is evaluated using the System Usability Scale. It can be  concluded that the application is categorized as “Good” with a grade scale “C” and acceptability ranges<br /><br /><strong>Abstrak</strong><div><br />Keberadaan alat musik tradisional khususnya Betawi semakin lama semakin menghilang tergerus kehidupan modern dan gaya hidup global yang lebih banyak mengadopsi alat musik Barat dengan segala kemudahannya. Salah satu upaya yang dapat dilakukan adalah dengan mengembangkan sebuah aplikasi menggunakan teknologi augmented reality. Penelitian ini akan berfokus pada pengembangan aplikasi augmented reality menggunakan pendekatan mix approach yaitu penggabungan antara pendekatan kualitatif dan kuantitatif. Sedangkan dalam proses pengembangan aplikasi menggungkan metode perancangan Interactive Multimedia System Design Development (IMSDD). Aplikasi ini dievaluasi menggunakan System Usability Scale. Dapat disimpulkan bahwa aplikasi tergolong kategori “Good” dengan grade scale “C” dan acceptability ranges termasuk “High”</div></div>

scholarly journals Development of a Road Condition Information System using Augmented Reality Technology on Smartphones

2020 ◽  
Vol 10 (2) ◽  
pp. 49-55
Keyword(s):  
Information System ◽  
Augmented Reality ◽  
High Speed ◽  
Human Error ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Data Conversion ◽  
The Road ◽  
Road Condition ◽  
Augmented Reality Technology

Recently, accidents involving ground transportations are getting worse and more serious. Indonesian State Police (Korlantas POLRI) recorded the number of accidents in 2018 as many as 109,215 accidents. The number has incresed 4.69 percent compared to 2017 as many as 104,327 events. Road traffic accidents are caused by human error, the driver in this case. The driver's mistake is influenced by several factors, one of them is they cannot expect the road condition when they drive a vehicle at high speed. To solve this problem, drivers need information that can show road conditions. So, we present a new approach for detecting damaged roads by applying augmented reality technology. This research produces a road condition information system to help drivers get information about road conditions via smartphone. This system uses augmented reality technology with a markerless GPS Based Tracking method. The development of this system requires several stages such as collecting the data, data conversion, data classification, and views road condition. The researchers gathered the road condition data from the Public Work Department Semarang. This department itself undertakes a task to control the road condition in Semarang The trial of this system includes all drivers in Semarang city. Based on the results of the questionnaire responded to by 93 respondents, this test obtained an average value of 68%. So this system gets a pretty good response from the driver. Through this system, all drivers can avoid the damaged road condition which can cause traffic-congested and accident.

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