Faculty Profiles - FUNABIKI Nobuo

MISC - FUNABIKI Nobuo

Division display 101 - 120 of about 573 ／ All the affair displays >>

A graph-based blank element selection algorithm for fill-in-blank problems in Java programming learning assistant system

Nobuo Funabiki, Tana, Khin Khin Zaw, Nobuya Ishihara, Wen-Chung Kao

International Journal of Computer Science 44 ( 2 ) 247 - 260 2017

An element fill-in-blank problem application in UTYCC for Java programming learning assistant system

Htoo Htoo, Sandi Kyaw, Shwe Thinzar Aung, Hnin Aye Thant, Nobuo Funabiki

Proceedings of The 8th International Conference on Science and Engineering 2017 (ICSE 2017) 271 - 275 2017

A proposal of informative test code approach for code writing problem in Java programming learning assistant system

Khin Khin Zaw, Nobuo Funabiki, Wen-Chung Kao

Proceedings of The 8th International Conference on Science and Engineering 2017 (ICSE 2017) 260 - 265 2017

A design-aware test code approach for code writing problem in Java programming learning assistant system

Khin Khin Zaw, Nobuo Funabiki

International Journal of Space-Based and Situated Computing 7 ( 3 ) 145 - 154 2017

Dynamic access-point configuration approach for elastic wireless local-area network system

Md. Manowarul Islam, Md. Selim Al Mamun, Nobuo Funabiki, Minoru Kuribayashi

Proceedings of The Fifth International Symposium on Computing and Networking (CANDAR, ASON)) 2017

A Channel Assignment Extension of Active Access-Point Configuration Algorithm for Elastic WLAN System and Its Implementation Using Raspberry Pi

Mamun Md. Selim Al, Funabiki Nobuo, Lwin Kyaw Soe, Islam Md. Ezharul, Kao Wen-Chung

International Journal of Networking and Computing 7 ( 2 ) 248 - 270 2017

Language：English Publisher：IJNC Editorial Committee

Recently, Wireless Local-Area Network (WLAN) has become prevailing as it provides flexible Internet access to users with low cost through installation of several types of access points (APs) in the network. Previously, we proposed the active AP configuration algorithm for the elastic WLAN system using heterogeneous APs, which dynamically optimizes the configuration by activating or deactivating APs based on traffic demands. However, this algorithm assumes that any active AP may use a different channel from the other ones to avoid interferences, although the number of non-interfered channels in IEEE 802.11 protocols is limited. In this paper, we propose the extension of the AP configuration algorithm to consider the channel assignment to the active APs under this limitation. Besides, AP associations of the hosts are modified to improve the network performance by averaging loads among channels. The effectiveness of our proposal is evaluated using the WIMNET simulator in two topologies. Finally, the elastic WLAN system including this proposal is implemented using Raspberry Pi for the AP. The feasibility and performance of the implementation are verified through experiments using the testbed.

DOI： 10.15803/ijnc.7.2_248

CiNii Article

researchmap

A Minimax Approach for Access Point Setup Optimization in IEEE 802.11n Wireless Networks

Lwin Kyaw Soe, Funabiki Nobuo, Taniguchi Chihiro, Zaw Khin Khin, Mamun Md. Selim Al, Kuribayashi Minoru, Kao Wen-Chung

International Journal of Networking and Computing 7 ( 2 ) 187 - 207 2017

Language：English Publisher：IJNC Editorial Committee

Recently, an IEEE 802.11n access point (AP) prevailed over the wireless local area network (WLAN) due to the high-speed data transmission using the multiple input multiple output (MIMO) technology. Unfortunately, the signal propagation from the 802.11n AP is not uniform in the circumferential and height directions because of the multiple antennas for MIMO. As a result, the data transmission speed between the AP and a host could be significantly affected by their relative setup conditions. In this paper, we propose a minimax approach for optimizing the 802.11n AP setup condition in terms of the angles and the height in an indoor environment using throughput measurements. First, we detect a bottleneck host that receives the weakest signal from the AP in the field using the throughput estimation model. To explore optimal values of parameters for this model, we adopt the versatile parameter optimization tool. Then, we optimize the AP setup by changing the angles and the height while measuring throughput. For evaluations, we verify the accuracy of the model using measurement results and confirm the throughput improvements for hosts in the field by our approach.

DOI： 10.15803/ijnc.7.2_187

CiNii Article

researchmap

A fill-in-blank problem workbook for Java programming learning assistant system

Ta Na, Nobuo Funabiki, Khin Khin Zaw, Nobuya Ishihara, Shinpei Matsumoto, Wen-Chung Kao

International Journal of Web Information Systems 13 ( 2 ) 140 - 154 2017

Language：English Publisher：Emerald Group Publishing Ltd.

Purpose-To advance Java programming educations, the authors have developed a Java Programming Learning Assistant System (JPLAS) as a web application system. JPLAS provides fill-in-blank problems for novices to study the grammar and basic programming skills through code reading. Design/methodology/approach-To select the blank elements with grammatically correct and unique answers from a given Java code, the authors have proposed the graph-based blank element selection algorithm. Then, the code for this problem should be highly readable to encourage novice students to study it. Because code readability can be improved by proper names for identifiers, the authors have also proposed the naming rule testing algorithm to identify codes with correct names. Findings-In this paper, the authors present a fill-in-blank problem workbook by collecting suitable Java codes from textbooks and Web sites and applying these algorithms with several extensions. The workbook consists of 16 categories with a considerable number of problems that follow the conventional learning order of Java programming. Originality/value-The proper set of ready-made fill-in-blank problems is effective in enhancing the usability of JPLAS both for teachers and students. For the preliminary evaluation, the authors assign a few problems to students. In coming semesters, the authors will use this workbook in the course to verify the adequacy of the proposal for novices.

DOI： 10.1108/IJWIS-12-2016-0076

Scopus

researchmap

A Proposal of Software Architecture for Java Programming Learning Assistant System

Nobuya Ishihara, Nobuo Funabiki, Minoru Kuribayashi, Wen-Chung Kao

2017 IEEE 31ST INTERNATIONAL CONFERENCE ON ADVANCED INFORMATION NETWORKING AND APPLICATIONS (AINA) 2 ( 1 ) 64 - 70 2017

Language：English Publisher：IEEE

To improve Java programming educations, we have developed a Web-based Java Programming Learning System (JPLAS). To deal with students at different levels, JPLAS provides three levels of problems, namely, element fill-in-blank problems, statement fill-in-blank problems, and code writing problems. Unfortunately, since JPLAS has been implemented by various students who studied in our group at different years, the code has become complex and redundant, which makes further extensions of JPLAS extremely hard. In this paper, we propose the software architecture for JPLAS to avoid redundancy to the utmost at implementations of new functions that will be continued with this JPLAS project. Following the MVC model, our proposal basically uses Java for the model (M), JavaScript/CSS for the view (V), and JSP for the controller (C). For the evaluation, we implement JPLAS by this architecture and compare the number of code files with the previous implementation.

DOI： 10.1109/AINA.2017.56

Web of Science

researchmap

Other Link： https://www.graphyonline.com/journal/journal_article_inpress.php?journalid=IJCSE

A Proposal of Test Code Generation Tool for Java Programming Learning Assistant System

Nobuo Funabiki, Ryota Kusaka, Nobuya Ishihara, Wen-Chung Kao

2017 IEEE 31ST INTERNATIONAL CONFERENCE ON ADVANCED INFORMATION NETWORKING AND APPLICATIONS (AINA) 51 - 56 2017

Authorship：Lead author Language：English Publisher：IEEE

To advance Java programming educations, we have developed the Java programming learning assistant system (JPLAS) that can verify the correctness of the code from a student automatically using the test-driven development (TDD) method. Then, to register a new assignment in JPLAS, teachers are required to write the test code in addition to the reference source code. Unfortunately, most teachers at schools are not accustomed to writing test codes. In this paper, we propose a test code generation tool that automatically generates the test cases from the reference source code by extracting the outputs for given inputs using functions in JUnit. As assignments for Java novice students, the code that contains standard inputs/outputs is emphasized. For evaluation, we collected 97 codes containing standard inputs/outputs from Java programming text books or Web sites. The experimental result has shown that the proposed tool correctly generated the test codes for them except for one code using a random generator.

DOI： 10.1109/AINA.2017.60

Web of Science

researchmap

A fill-in-blank problem workbook for Java programming learning assistant system

Ta Na, Nobuo Funabiki, Khin Khin Zaw, Nobuya Ishihara, Shinpei Matsumoto, Wen-Chung Kao

International Journal of Web Information Systems 13 ( 2 ) 140 - 154 2017

Language：English Publisher：Emerald Group Publishing Ltd.

DOI： 10.1108/IJWIS-12-2016-0076

Scopus

researchmap

A graph-based blank element selection algorithm for fill-in-blank problems in Java programming learning assistant system

Nobuo Funabiki, Tana, Khin Khin Zaw, Nobuya Ishihara, Wen Chung Kao

IAENG International Journal of Computer Science 44 ( 2 ) 247 - 260 2017

A User-PC computing system as ultralow-cost computation platform for small groups

Nobuo Funabiki, Kyaw Soe Lwin, Yuuki Aoyagi, Minoru Kuribayashi, Wen-Chung Kao

Application and Theory of Computer Technology 2 ( 3 ) 10 - 24 2017

A Proposal of Software Architecture for Java Programming Learning Assistant System

Nobuya Ishihara, Nobuo Funabiki, Minoru Kuribayashi, Wen-Chung Kao

2017 IEEE 31ST INTERNATIONAL CONFERENCE ON ADVANCED INFORMATION NETWORKING AND APPLICATIONS (AINA) 64 - 70 2017

Language：English Publisher：IEEE

DOI： 10.1109/AINA.2017.56

Web of Science

researchmap

Javaプログラミング学習支援システムJPLASのステートメント補充問題のオフライン解答機能

TANG Lewei, 舩曵信生, 石原信也, 栗林稔

電気・情報関連学会中国支部連合大会講演論文集(CD-ROM) 68th 2017

A Channel Assignment Extension of Holding Access-Point Assignment Algorithm for Wireless Local-Area Networks

116 ( 382 ) 95 - 100 2016.12

Raspberry Pi Configuration for Access-Point and Its Throughput Measurements in IEEE802.11n Wireless Networks (ネットワークシステム)

KUMAR DEBNATH Sumon, 舩曵信生, SOE LWIN Kyaw, SELIM AL MAMUN Md., WIDYATRA SUDIBYO Rahardhita, HUDA Samsul

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 116 ( 382 ) 101 - 106 2016.12

A Development of Parameter Optimization Tool and Its Application to Throughput Estimation Model for Wireless LANs

谷口知弘, 舩曵信生, 栗林稔, SOE LWIN Kyaw, SUMON KUMAR Debnath, KHIN ZAW Khin

電子情報通信学会技術研究報告 116 ( 382(NS2016 118-140) ) 89 - 94 2016.12

Implementations of Problem Assignment and Offline Fill-in-blank Problem Learning Functions in Java Programming Learning Assistant System

佐々木伸, 舩曵信生, 栗林稔, 石原信也

電子情報通信学会技術研究報告 116 ( 351(ET2016 66-77) ) 33 - 38 2016.12

Offline Answering Function for Code Writing Problem in Java Programming Learning Assistant System

WANG Yingxin, 舩曵信生, 栗林稔, 石原信也

電子情報通信学会技術研究報告 116 ( 351(ET2016 66-77) ) 39 - 44 2016.12

　 PREV - NEXT 　

< FUNABIKI Nobuo >

MISC - FUNABIKI Nobuo