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ICCAS-SICE 2009 - ICROS-SICE International Joint Conference 2009

作者： Kanemoto, Yoshinori Yamasaki, Taiga Xin, Xin Gotoh, Kiyoshi Faculty of Computer Science and System Engineering Okayama Prefectural University Okayama Japan

ISBN: (纸本)9784907764296

Extent of redundancy in human movements under nonholonomic constraints can be an important factor to determine a resulting movement. However, the redundancy has seldom been examined concretely in previous studies concerning optimality of human movements under such constraints. This study focuses on a gymnastic movement on the high bar, called 'giant swing backward', as an almost periodic task under a second order nonholonomic constraint, and reveals a part of redundancy of the task by extending our previous study. To this end, a simple dynamical model of an expert gymnast performing the giant swing backward is constructed with parameterization of time histories of actuated joint angles by Fourier series, and is confirmed to approximately reproduce a measured movement of the gymnast. The redundancy is calculated in various parameter spaces composed of lower order Fourier coefficients. The results illustrate restricted but considerable redundancy underlying the giant swing backward. Moreover, within the set of the redundant movements, four kinds of optimization criteria are examined to explain the movement performed by the gymnast. © 2009 SICE.

关键词： Redundancy

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Effectiveness of server load estimation by using request file size for web server clusters

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and systems 2008年第10期128卷 1543-1549+5页

作者： Satake, Shinsuke Inai, Hiroshi Arai, Tsuyoshi Department of Communication Engineering Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja-shi Okayama 719-1197 Japan

There have been proposed several dynamic load-balancing methods for web server clusters. In order to realize an effective load-balancing, they have required an almost real-time server load information which could be obtained from an observation of client-server interactions or a frequent polling from the load-balancer (dispatcher) to each server. However the observation provides an indirect server load information and the polling interval produces a time-lag. To overcome that problem, this paper proposes a load-balancing method based on a server load estimation. Under an employment of our method, the load-balancer selects an estimated least-loaded server, and then assigns the arriving request to that server. The estimation is based on a fact that the file transfer delay is proportional to the file size. The fact makes it possible to estimate each server load from the last request assigned time and the file size. From a performance comparison with the previously proposed methods, our method can realize an effective load balancing for web server clusters. © 2008 The Institute of Electrical Engineers of Japan.

关键词： Web services

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An upper bound on bit error rate for concatenated convolutional code

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND computer scienceS 1997年第11期E80A卷 2123-2129页

作者： Wadayama, T Wakasugi, K Kasahara, M Faculty of Computer Science and System Engineering Okayama Prefectural University Soja-shi 719-11 Japan Department of Electronics and Information Science Kyoto Institute of Technology Kyoto-shi 606 Japan

This paper presents a new upper bound on overall bit error rate (BER) for a concatenated code which consists of an inner convolutional code and an outer interleaved Reed-Solomon code. The upper bound on BER is derived based on a lower bound on the effective minimum distance of the concatenated code. This upper bound can be used for the cases when the interleaver size is small such that the conventional upper bound is not applicable.

关键词： concatenated code convolutional code interleave Reed-Solomon code burst correction

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Propagating Requirement Change into Software High Level Designs towards Resilient Software Evolution

Propagating Requirement Change into Software High Level Desi...

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16th Asia-Pacific Software engineering Conference

作者： Ibrahim, Noraini Kadir, Wan M. N. Wan Deris, Safaai Software Engineering Dept. Faculty of Computer Science and Information System Universiti Teknologi Malaysia Malaysia

ISBN: (纸本)9780769539096

Uncertain and incomplete requirements throughout the whole software life cycle contribute to volatility of the requirements. In a situation where the volatile requirement is changed to satisfy stakeholder needs, all the affected requirements and other impacted software artefacts (such as designs, codes, and tests) must be identified and changed accordingly. This paper introduces an approach to facilitate both engineers and users in propagating changes from requirements to the software high-level designs during software development and evolution. The two main pillars of this approach, namely product metamodel and process model are described in details. Firstly, the metamodel highlights on explicit conceptual model for volatile requirement and its characteristics. Next, the focus will be placed on the systematic process model specified using the SPEM that offers guidelines to perform the requirement change process. The applicability of the product metamodel and its elements are evaluated using the IFAMMS case study application.

关键词： Volatile Requirement Change Propagation Software High Level Designs Software Evolution

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Comparative Study for Classification Methods to Predict and Detect Epilepsy Seizure 5

Comparative Study for Classification Methods to Predict and ...

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5th IEEE Middle East and Africa Conference on Biomedical engineering, MECBME 2020

作者： El Halabi, Nashaat Abi Zeid Daou, Roy Achkar, Roger Hayek, Ali Boercsoek, Josef American University of Science and Technology Department of Computer and Communications Engineering Faculty of Engineering Beirut Lebanon Faculty of Public Health Biomedical Technologies Department Jounieh Lebanon American University of Science and Technology Department of Computer and Communications Engineering Faculty of Engineering Beirut Lebanon Computer Science University of Kassel Department of Computer Architecture and System Programming Faculty of Electrical Engineering Germany Computer Science University of Kassel Department of Computer Architecture and System Programming Faculty of Electrical Engineering Germany

ISBN: (纸本)9781728123585

Epilepsy is a medical problem that tackles lots of patients. It limits the life activity of such patients due to the seizures that occur anytime and anywhere. Thus, creating a monitoring system that could make their life easier and allow them to perform daily life activities as safe as possible has been studied. This paper is a continuity for a project where a system monitors epileptic patients using a set of wearable sensors connected to several processing units, the main sensors are Electroencephalogram (EEG) for the electrical activity of the brain, electrocardiogram (ECG) for the electrical activity of the heart, and accelerometers to monitor the posture of the patient, features extracted from EEG and ECG signals are used for prediction/detection of seizures. Thus, the objective of this paper is to present a comparative study in order to choose the appropriate classification method for seizure prediction and detection. Five classification methods were studied: Decision Trees, Discriminant Analysis, Support Vector Machine (SVM), K-Nearest Neighbor (KNN), and Ensemble Learning. For each of the classification methods, the accuracy, the specificity, the sensitivity, the precision, the false detection rate and the Fmeasure were studied and compared. The results for seizure prediction system show that the highest accuracy, specificity and F-Measure, and lowest false detection rate were achieved with Bagged Trees Ensemble Learning, the highest sensitivity and precision were achieved with Quadratic Support Vector Machine. However, for seizure detection system, the highest accuracy and F-Measure were achieved with Linear Support Vector, the highest sensitivity and specificity were achieved with Fine Gaussian Support Vector Machine, and the highest precision and lowest false detection rate were achieved with Subspace Discriminant Ensemble Learning. © 2020 IEEE.

关键词： Support vector machines

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Performance Analysis of 3D Rendering Method on Web-Based Augmented Reality Application Using WebGL and OpenGL Shading Language 23

Performance Analysis of 3D Rendering Method on Web-Based Aug...

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8th International Conference on Sustainable Information engineering and Technology, SIET 2023

作者： Hamzaturrazak, Multohadi Jonemaro, Eriq Muhammad Adams Pinandito, Aryo Informatics Engineering Department Universitas Brawijaya Faculty of Computer Science Indonesia Information System Department Universitas Brawijaya Faculty of Computer Science Indonesia

ISBN: (纸本)9798400708503

In recent years, web programming has increased to the extent where it is capable of rendering 3D objects on the web. Its rendering performance varied depending on where it ran and what library was used to render the objects. This study aims to investigate the rendering performance of several 3D renderer libraries that render 3D objects in an augmented reality application. WebGL is one of the APIs that uses the Javascript programming language to render 3D objects in web applications. To create augmented reality on the web, a JavaScript library called *** is needed, which allows developers to create augmented reality on the web without the need to use additional plugins. *** supports various types of augmented reality, i.e., bookmarks, images, and location-based types. It also allows developers to incorporate visual and audio effects into augmented reality. This study aims to investigate the rendering performance of WebGL raw shaders and GLSL shaders in an HTML-based augmented reality application. The results suggested that both WebGL and GLSL could render low-poly and medium-poly 3D objects well. However, according to the test, WebGL performance drops significantly when rendering high-polygon 3D objects. Nonetheless, the GLSL library could render the same high-poly 3D objects at a similar level with native library rendering performance. Thus, suggest GLSL shaders as the recommended library to render 3D objects on the web. © 2023 ACM.

关键词： Augmented reality

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Improving Information Delivery Effectiveness and Efficiency Using WebVR Technology 23

Improving Information Delivery Effectiveness and Efficiency ...

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8th International Conference on Sustainable Information engineering and Technology, SIET 2023

作者： Pratama, Ardiyan Nur Akbar, Muhammad Aminul Pinandito, Aryo Informatics Engineering Department Universitas Brawijaya Faculty of Computer Science Indonesia Information System Department Universitas Brawijaya Faculty of Computer Science Indonesia

ISBN: (纸本)9798400708503

In this digital era, attracting new students from outside the region to enter a college or university is difficult. This problem can be solved with good marketing and information dissemination techniques. Information is a type of data that has been processed and organized so that it has relevant meaning for the recipient. Useful information can be used to help make decisions, gain new knowledge, or solve problems. One medium for providing information is by using videos that can be uploaded to YouTube for dissemination. However, problems arise when the information depends on the point of view of the video content creator, who may not provide enough information sought by users in their videos. Virtual reality (VR) technology can be pursued as one of the solutions to overcome the lack of detail and control in videos for users to get the expected information. One of the technologies in VR that allows people to explore a three-dimensional virtual world on a web platform is the 360° WebVR technology. Since users have full control over what can be seen using WebVR, it is expected that this technology can assist users in getting deeper and detailed information related to their needs. This study aims to determine the effectiveness and efficiency of using YouTube videos and WebVR in distributing information and delivering detailed information to users. The results show that WebVR technology has the potential to provide greater control over more detailed information to users who use it, in contrast to traditional two-dimensional video playback technology. © 2023 ACM.

关键词： Virtual reality

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Error Correction on iris biometric template using reed solomon codes

Error Correction on iris biometric template using reed solom...

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Asia Modelling Symposium 2010: 4th International Conference on Mathematical Modelling and computer Simulation, AMS2010

作者： Moi, Sim Hiew Saad, Puteh Rahim, Nazeema Abd Ibrahim, Subariah Department of Software Engineering Faculty of Computer Science and Information System Universiti Teknologi Malaysia Johor Malaysia Department of System and Communication Faculty of Computer Science and Information System Universiti Teknologi Malaysia Johor Malaysia

ISBN: (纸本)9780769540627

Pin number or password that is used for authentication can be easily attacked. This limitation triggered the utilization of biometric for secured transactions. Biometric is unique to each individual and is reliable. Among the types of biometric being used currently, iris is the most accurate and it remains stable throughout a person's life. However the major challenge on iris and other biometric for authentication is the intra user variability in the acquired identifiers. Iris of the same person captured at different time may differ due to the signal noise of the iris camera. Traditional cryptography method is unable to encrypt and store biometric template, then perform the matching directly. Minor changes in the bits of the feature set extracted from the iris may lead to a huge difference in the results of the encrypted feature. In our approach, an iris biometric template is secured using iris biometric and passwords. Error Correction Code, ECC is introduced to reduce the variability and noise of the iris data. Experimental results show that this approach can assure a higher security with a low false rejection or false acceptance rate. The successful iris recognition rate using this approach is up to 97%. © 2010 IEEE.

关键词： Biometrics

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Enhancing the Efficiency of Navigation systems: Dijkstra Algorithm Optimization Through Integration of Douglas-Peucker Line Simplification Technique 23

Enhancing the Efficiency of Navigation Systems: Dijkstra Alg...

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8th International Conference on Sustainable Information engineering and Technology, SIET 2023

作者： Haq, Muhammad Yasir Anshari Sianturi, Riswan Septriayadi Pinandito, Aryo Informatics Engineering Department Universitas Brawijaya Faculty of Computer Science Indonesia Information System Department Universitas Brawijaya Faculty of Computer Science Indonesia

ISBN: (纸本)9798400708503

Smartphones have grown popular in the current digital era among people. Map-based applications are one of many that are used daily by people to acquire information about specific locations. Google Maps and Waze are two popular examples of map-based applications for travel and navigation, as they provide detailed information while the user navigates from one point to another. One of the most commonly used algorithms in map-based applications is the Dijkstra algorithm. Although the Dijkstra algorithm can determine the shortest route between two points, there is an issue when the selected route involves a large number of data points that need to be processed. The more data points involved, the longer it takes to do a route calculation in the Dijkstra algorithm. This can lead to a degradation in system performance, especially on smartphones with limited resources. To address this issue, the Douglas-Peucker algorithm is proposed as a solution to reduce the number of points involved in the calculation using the line simplification technique. Line simplification means reducing unnecessary points that are considered unimportant. This study suggested that integrating the Douglas-Peucker line simplification technique before Dijkstra could improve the system performance more than the system without integrating line simplification in terms of reducing both memory usage and the time required to compute the solution. © 2023 ACM.

关键词： Navigation systems

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Self-localization of swarm robots based on voice signal acquisition

Self-localization of swarm robots based on voice signal acqu...

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International Conference on computer and Communication engineering, ICCCE'10

作者： Arvin, Farshad Doraisamy, Shyamala Samsudin, Khairulmizam Ramli, Abdul Rahman Department of Computer System Engineering Faculty of Engineering Malaysia Department of Multimedia Faculty of Computer Science and Information Technology 43400 UPM Serdang Malaysia

ISBN: (纸本)9781424462346

This paper presents an acoustical signal tracking experiment by swarm mobile robots. Biological swarm is a fascinating behavior of nature which was inspired from social insects' behavior. A mobile robot that is designed as a swarm robotic platform was employed for implementing voice exploration behavior. An additional module was developed to connect to robots for processing given voice signals using the proportional signal strength approach that estimates orientation of sound source using fuzzy logic approach. The voice processor module utilizes four condenser microphones with around -47db sensitivity which are placed in different directions of the circuit board for capturing surrounding sound signals. Captured samples by microphones are processed to estimate the relative positions of the sound source in the robotic environment. After estimating the position of the signal's source, all participants move towards similar to the insects' colony. The participant robots have an individual task for the estimation of source location from captured samples. Moreover, according to the swarm definition, an additional cooperation between swarm participants is required to achieve a correct colony of robots. Obtained results illustrate the feasibility of the proposed technique and hardware interface for sound signals acquisition with swarm robots. © 2010 IEEE.

关键词： Fuzzy logic

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