Faculty Profiles - FUNABIKI Nobuo

Offline Answering Function for Fill-in-blank Problems in Java Programming Learning Assistant System

Nobuo Funabiki, Hiroki Masaoka, Nobuya Ishihara, I-Wei Lai, Wen-Chung Kao

2016 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS-TAIWAN (ICCE-TW) 315 - 316 2016

Authorship：Lead author Language：English Publisher：IEEE

To assist Java programming educations, we have developed a Web-based Java Programming Learning Assistant System (JPLAS). JPLAS provides fill-in-blank problems to let students study the grammar and the code structure for Java by filling blank elements in a high-quality code that are composed of reserved words, identifiers, and control symbols. However, students can answer the problems only when connected with the Internet, which limits the time and place for them to use JPLAS. In this paper, we implement the offline answering function for fill-in-blank problems in JPLAS. To avoid cheating by students, we adopt the hash function and the message authentication technique. We confirm the effectiveness of our proposal through applications to the Java programming course in our department.

DOI： 10.1109/ICCE-TW.2016.7521045

Toward Personalized Learning in JPLAS: Generating and Scoring Functions for Debugging Questions

Takato Mohri, Shingo Yamaguchi, Nobuo Funabiki

2016 IEEE 5TH GLOBAL CONFERENCE ON CONSUMER ELECTRONICS 216 - 219 2016

Authorship：Lead author Language：English Publisher：IEEE

Today, some Java program learning support systems have been proposed. Each student has his/her own learning level. It is important to give questions suitable for his/her learning level for each student. But it will cause an enormous burden to the teacher. In this paper, we implement the automatic generating function and the scoring function regarding debugging questions in Java programming learning assistant system called JPLAS. We proposed personalized learning with two functions such as automatic generating and scoring of debugging question used in JPLAS. We showed the effectiveness of proposed method with chi-squared test.

DOI： 10.1109/GCCE.2016.7800392

A Proposal of Three Extensions in Blank Element Selection Algorithm for Java Programming Learning Assistant System

Khin Khin Zaw, Nobuo Funabiki, Minoru Kuribayashi

2016 IEEE 5TH GLOBAL CONFERENCE ON CONSUMER ELECTRONICS 3 - 5 2016

Authorship：Lead author Language：English Publisher：IEEE

To assist Java programming educations, we have developed a Web-based Java Programming Learning Assistant System (JPLAS). JPLAS provides fill-in-blank problems to let students study Java grammar and basic programming skills by filling the blanked elements in a given Java code. To generate the feasible problems, we have proposed a blank element selection algorithm using the constraint graph to select as many blanks as possible such that they have grammatically correct and unique answers. In this paper, to further increase the number of blanks and control the difficulty of the generated problem, we extend this algorithm by 1) adding operators in conditional expressions for blank candidates, 2) improving the edge generation method in the constraint graph to increase the number of blanks, and 3) introducing two parameters to change the frequency of selecting blanks. To verify the effectiveness, we apply the extended algorithm to 55 Java codes for fundamental data structure or algorithms, and confirm that these extensions can increase the number of blanks and change the problem difficulty.

DOI： 10.1109/GCCE.2016.7800312

Analysis of Fill-in-blank Problem Solution Results in Java Programming Course

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

2016 IEEE 5TH GLOBAL CONFERENCE ON CONSUMER ELECTRONICS 479 - 480 2016

Authorship：Lead author Language：English Publisher：IEEE

For advancing the educational quality of Java programming, we have proposed and implemented the Java Programming Learning Assistant System (JPLAS) as a Web application system. JPLAS offers fill-in-blank problems that request students to fill in the blank elements in a given Java code to study Java grammar and basic programming skills. In past years, we have utilized fill-in-blank problems at our Java programming courses. In this paper, we analyze solution results of students taking the course in 2015, and confirm the relatively high correlation between solution performances and course grades.

DOI： 10.1109/GCCE.2016.7800486

A Proposal of Coding Rule Learning Function in Java Programming Learning Assistant System

Nobuo Funabiki, Takuya Ogawa, Nobuya Ishihara, Minoni Kuribayashi, Wen-Chung Kao

PROCEEDINGS OF 2016 10TH INTERNATIONAL CONFERENCE ON COMPLEX, INTELLIGENT, AND SOFTWARE INTENSIVE SYSTEMS (CISIS) 561 - 566 2016

Authorship：Lead author Language：English Publisher：IEEE

Recently, Java has been educated in many universities and professional schools due to reliability, portability, and scalability. However, because of its limited time in Java programming courses, coding rules arc rarely educated. As a result, codes made by students become far from readable codes. In this paper, we propose a coding rule learning function using static code analyzers in Java Programming Learning Assistant System (JPLAS), targeting students who have accomplished the grammar learning and are going to write practical codes for final projects. Coding rules for this function consist of naming rules, coding styles, and potential problems. We evaluate the improvement of readability in four codes refined by this function and the usability of this function through the questionnaires completed by five students. In future studies, we expect that this function will be employed in Java programming courses.

DOI： 10.1109/CISIS.2016.94

A Proposal of Recipe Conversion Algorithm for Cooking-Step Schedule Optimization

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

Nobuo Funabiki, Khin Khin Zaw, Wen-Chung Kao

The 11-th International Conference on Broadband and Wireless Computing, Communication and Applications (BWCCA2016) 331 - 342 2016

Analysis of fill-in-blank problem solutions and extensions of blank element selection algorithm for Java programming learning assistant system

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

The World Congress on Engineering and Computer Science 2016 (WCECS 2016) 237 - 242 2016

A minimax approach for access-point setup optimization using throughput measurements in IEEE802.11n wireless networks

Kyaw Soe Lwin, Nobuo Funabiki, Khin Khin Zaw, Md. Selim Al Mamun, Minoru Kuribayashi

The Fourth International Symposium on Computing and Networking (CANDAR, ASON) 311 - 317 2016

A core blank element selection algorithm for code reading studies by fill-in-blank problems in Java programming learning assistant system

Khin Khin Zaw, Nobuo Funabiki

The 7th International Conference on Science and Engineering 2016 (7th ICSE 2016) 204 - 208 2016

Applications of coding rule learning function to workbook codes for Java programming learning assistant system

Nobuo Funabiki, Shinpei Matsumoto, Khin Khin Zaw, Wen-Chung Kao

The 7th International Conference on Science and Engineering 2016 (7th ICSE 2016) 1170 - 1175 2016

115 ( 221 ) 67 - 72 2015.9

BS-6-2 A Blank Line Selection Algorithm for Value Trace Problem in Java Programming Learning Assistant System(BS-6.Network and service Design, Control and Management)

Zaw Khin Khin, Funabiki Nobuo

Proceedings of the Society Conference of IEICE 2015 ( 2 ) "S - 19"-"S-20" 2015.8

Language：English Publisher：The Institute of Electronics, Information and Communication Engineers

To cultivate the code reading capability of Java novice students, we have studied the value trace problem for the Web-based Java Programming Learning Assistant System (JPLAS). This problem asks students to trace actual values of important variables in fundamental data structure or algorithms. To realize the automatic problem generation, the whole sequence of changing data of such variables are output in lines by executing the code for the data structure or algorithm. Then, output data lines that have difference from their previous lines are blanked to be filled. In this paper, we propose the blank line selection algorithm for the value trace problem, and show an example of the generated problem for the insertion sort algorithm.

A Cooking-Step Scheduling Algorithm with Guidance System for Homemade Cooking

Yukiko Matsushima, Nobuo Funabiki

IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E98D ( 8 ) 1439 - 1448 2015.8

Language：English Publisher：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG

Homemade cooking plays a key role for a healthy and cost-efficient life. Unfortunately, preparing multiple dishes is generally time-consuming. In this paper, an algorithm is proposed to minimize the cooking time by scheduling the cooking-step of multiple dishes. The cooking procedure of a dish is divided into a sequence of six types of cooking-steps to consider the constraints in cooks and cooking utensils in a kitchen. A cooking model is presented to optimize the cooking-step schedule and estimate the cooking time for a given starting order of dishes under various constraints of cooks and utensils. Then, a high-quality schedule is sought by repeating the generation of a new order and the model application based on exhaustive search and simulated annealing. Our simulation results and cooking experiments confirm the effectiveness of our proposal.

DOI： 10.1587/transinf.2015EDP7048

An Active Access-Point Configuration Algorithm for Wireless Local Area Networks with Heterogeneous Devices (ネットワークシステム)

セリムアルマムンムハマド, エズハルルイスラムムハマド, 舩曵信生

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 115 ( 159 ) 147 - 152 2015.7

Performance evaluations for multi-user MIMO using WIMNET simulator

115 ( 159 ) 141 - 146 2015.7

An Implementation and Evaluation of Job Scheduling Methods for User-PC Computing System

AOYAGI Yuki, FUNABIKI Nobuo, FUKUSHI Masaru

IEICE technical report 114 ( 477 ) 553 - 558 2015.3

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

We have proposed and implemented User-PC computing (UPC) system as a parallel computing platform using idling computing resources (CPU cycles) in personal computers (PCs) of members in the same organization such as a laboratory in a university. Because the original UPC system has adopted a sequential job scheduling method which assigns new jobs to workers in the descending order of their performance up to its permissible number, some workers may not be assigned any job. In this paper, we propose static and dynamic round-robin (RR)job scheduling methods of assigning a predefined number of new jobs to the workers in round-robin fashion. The dynamic RR method considers the change of the worker's performance by using the CPU time of recent jobs. Our experiment results show that when the performance difference among workers and the number of jobs are small, both RR methods performs well, and when both of them are large, the dynamic RR method shows better performance.

Active Access Point Selection Algorithm for Scalable Wireless Mesh Networks

FUJITA Sho, FUNABIKI Nobuo

IEICE technical report 114 ( 477 ) 427 - 432 2015.3

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

The wireless Internet-access mesh network (WIMNET) can realize an inexpensive scalable Internet-access network by using multiple access points (APs) connected by wireless links. We have proposed the active AP selection algorithm of selecting active APs for high-speed and low-cost communications in large WIMNET. In this paper, we extend this algorithm to improve the performance of WIMNET by introducing mobile routers. Besides, we present the plural AP deactivation procedure using link speeds for better practicality. We show the effectiveness of the proposals through simulations in two instances.

Javaプログラミング授業におけるエレメント空欄補充問題の実践

塔娜, 舩曵信生, 石原信也

研究報告コンピュータと教育（CE） 2015 ( 11 ) 1 - 8 2015.2

Language：Japanese

本グループでは，プログラミング言語 Java の学習支援のために，Web を用いた Java プログラミング学習支援システム JPLAS(Java Programming Learning Assistant System) を開発している．JPLAS では，Java の初学者を対象としたエレメント空欄補充問題を提供しており，グラフ理論を用いた解の一意性を充たす問題生成のためのアルゴリズムを提案している．今回，本アルゴリズムを用いてエレメント空欄補充問題を生成し，本学科の Java プログラミング授業で実践活用した結果を報告する．

学生用PCを用いたユーザPCコンピューティングシステムのWebインターフェース

金奉洙, 舩曵信生

研究報告コンピュータと教育（CE） 2015 ( 7 ) 1 - 8 2015.2

Language：Japanese

本グループでは，研究室内の学生が使用するパーソナルコンピュータ（PC）の空き資源を利用して，大規模シミュレーションなどの計算プロジェクトを実行する，ユーザ PC コンピューティングシステム UPC（User-PC Computing System）を開発している．UPC では，大規模コンピューティング環境の実現に関して，運営コストの低減と利便性の向上の実現を目指している．UPC では，計算プロジェクトの実行には，コマンド入力が必要となっており，その知識に乏しいユーザには UPC の使用が容易ではない．そこで本研究では，ブラウザで UPC の利用を可能とするために，Web 技術を用いた UPC ユーザインターフェース機能を開発する．UPC サーバ間とファイル共有ソフトを用いて連携することで，異なる複数の UPC へのインターフェース機能の提供を可能としている．本稿では，今回開発した UPC インターフェース機能の構成を示す．