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pISSN : 1598-849X / eISSN : 2383-9945

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2014, Vol.19, No.4

  • 1.

    Analysis on the Temperature of Multi-core Processors according to Placement of Functional Units and L2 Cache

    손동오 , Jong Myon Kim , Cheol Hong Kim | 2014, 19(4) | pp.1~8 | number of Cited : 0
    Abstract PDF
    As cores in multi-core processors are integrated in a single chip, power density increasedconsiderably, resulting in high temperature. For this reason, many research groups have focused on the techniques to solve thermal problems. In general, the approaches using mechanical coolingsystem or DTM(Dynamic Thermal Management) have been used to reduce the temperature in themicroprocessors. However, existing approaches cannot solve thermal problems due to high cost andperformance degradation. However, floorplan scheme does not require extra cooling cost andperformance degradation. In this paper, we propose the diverse floorplan schemes in order toalleviate the thermal problem caused by the hottest unit in multi-core processors. Simulationresults show that the peak temperature can be reduced efficiently when the hottest unit is locatednear to L2 cache. Compared to baseline floorplan, the peak temperature of core-central andcore-edge are decreased by 8.04℃, 8.05℃ on average, respectively.
  • 2.

    Design of Line Scratch Detection and Restoration Algorithm using GPU

    이준구 , 심세용 , 유병문 and 1 other persons | 2014, 19(4) | pp.9~16 | number of Cited : 0
    Abstract PDF
    This paper proposes a linear scratch detection and restoration algorithm using pixel datacomparison in a single frame or consecutive frames. There exists a high parallelism in that ascratch detection and restoration algorithm needs a large amount of comparison operations. Theproposed scratch detection and restoration algorithm is designed with a GPU for fast computation. We test the proposed algorithm in sequential and parallel processing with the set of digital videosin National Archive of Korea. In the experiments, the scratch detection rate of consecutive framesis as fast as about 20% for that of a single frame. The detection and restoration rates of a GPU-based algorithm are similar to those of a CPU-based algorithm, but the parallelimplementation speeds up to about 50 times.
  • 3.

    A Post-mortem Detection Tool of First Races to Occur in Shared-Memory Programs with Nested Parallelism

    MunHye Kang , Gabsig Sim | 2014, 19(4) | pp.17~24 | number of Cited : 0
    Abstract PDF
    Detecting data races is important for debugging shared-memory programs with nestedparallelism, because races result in unintended non-deterministic executions of the program. It isespecially important to detect the first occurred data races for effective debugging, because theremoval of such races may make other affected races disappear or appear. Previous dynamicdetection tools for first race detecting can not guarantee that detected races are unaffected races. Also, the tools does not consider the nesting levels or need support of other techniques. This papersuggests a post-mortem tool which collects candidate accesses during program execution and then detects the first races to occur on the program after execution. This technique is efficient, becauseit guarantees that first races reported by analyzing a nesting level are the races that occur first atthe level, and does not require more analyses to the higher nesting levels than the current level.
  • 4.

    Stochastic Power-efficient DVFS Scheduling of Real-time Tasks on Multicore Processors with Leakage Power Awareness

    LEE KWAN WOO | 2014, 19(4) | pp.25~33 | number of Cited : 0
    Abstract PDF
    This paper proposes a power-efficient scheduling scheme that stochastically minimizes thepower consumption of real-time tasks while meeting their deadlines on multicore processors. In theproposed scheme, uncertain computation amounts of given tasks are translated into probabilisticcomputation amounts based on their past completion amounts, and the mean power consumption ofthe translated probabilistic computation amounts is minimized with a finite set of discrete clockfrequencies. Also, when system load is low, the proposed scheme activates a part of all available cores with unused cores powered off, considering the leakage power consumption of cores. Evaluation shows that the scheme saves up to 69% power consumption of the previous method.
  • 5.

    A design of Software 2D BitBLT Engine based on RTOS

    김봉주 , Jiman Hong | 2014, 19(4) | pp.35~41 | number of Cited : 0
    Abstract PDF
    In this paper, we proposed the implementation of software-based 2D BitBLT engine on thepSOS operating system and the operation of the BitBLT engine on patient monitoring device wasverified. To verify the proposed method on the patient monitoring device, we designed prototypePCB board, and verified the operation. We designed the motherboard by using ARM9-based CPU. Because hardware-based BitBLT module was replaced with software-based one, CPU load problemwas weighted. To solve this problem, w changed 400Mhz processor instead of 200Mhz processor. We implemented 2D BitBLT kernel module as a device driver which is one of the key elements ofa graphics controller GUI in patient monitoring device.
  • 6.

    An Ontology-based Analysis of Wikipedia Usage Data for Measuring degree-of-interest in Country

    Hyon Hee Kim , Cho Jin Nam , Kim,Dong-Geon | 2014, 19(4) | pp.43~53 | number of Cited : 1
    Abstract PDF
    In this paper, we propose an ontology-based approach to measuring degree-of-interest incountry by analyzing wikipedia usage data. First, we developed the degree-of-interest ontologycalled DOI ontology by extracting concept hierarchies from wikipedia categories. Second, we mapthe title of frequently edited articles into DOI ontology, and we measure degree-of-interest basedon DOI ontology by analyzing wikipedia page views. Finally, we perform chi-square test ofindependence to figure out if interesting fields are independent or not by country. This approachshows interesting fields are closely related to each country, and provides degree of interests by country timely and flexibly as compared with conventional questionnaire survey analysis.
  • 7.

    Bearing Multi-Faults Detection of an Induction Motor using Acoustic Emission Signals and Texture Analysis

    장원철 , Jong Myon Kim | 2014, 19(4) | pp.55~62 | number of Cited : 2
    Abstract PDF
    This paper proposes a fault detection method utilizing converted images of acoustic emissionsignals and texture analysis for identifying bearing’s multi-faults which frequently occur in aninduction motor. The proposed method analyzes three texture features from the converted imagesof multi-faults: multi-faults image’s entropy, homogeneity, and energy. These extracted featuresare then used as inputs of a fuzzy-ARTMAP to identify each multi-fault including outer-inner,inner-roller, and outer-roller. The experimental results using ten times trials indicate that theproposed method achieves 100% accuracy in the fault classification.
  • 8.

    Design of 3D Action Game for PC Environment

    SYUNGOG AN , 이희범 , Park Dong-Won and 2 other persons | 2014, 19(4) | pp.63~69 | number of Cited : 0
    Abstract PDF
    Third Person Action Game is a genre receiving continuous interest from many game enthusiasts. The most distinctive feature about third person action games is that the user can actually see thecharacter as well as the various actions, which in turn increases user engagement. Many gamesare developed using game engines. However, this study designs a third person action game usingonly DirectX library instead of the specialized techniques in game engines. By doing so, the gamedevelopment costs will be minimalized. The study also uses several basic algorithms in order toprocess the various events and to make the animation effects more efficiently managed in thegraphic device. The performance superiority is demonstrated by the results of the study.
  • 9.

    Wideband Dual-polarized Microstrip Antenna with H-shaped Coupling Slot

    Kim, Jang Wook , Jeon Joo Seong | 2014, 19(4) | pp.71~79 | number of Cited : 0
    Abstract PDF
    This paper investigates wideband dual-polarized microstrip antenna with H-shapedcoupling slot. These types of antennas are used to prevent deterioration of transmissionquality caused by terminal interference or multipath fading, which usually occur when manyterminals are used in limited space such as hot-spot zones. The experimental results showthat the impedance bandwidth (SWR ≤ 2) of 33.98% and the peak gain of 8.58 dBi (at 2.11GHz) were obtained by the frequency band under 2.7 GHz. The proposed antenna is designedoriginally for multiple service bands with simple structure and easily be mass-produced for various commercial applications.
  • 10.

    Comparison of HMM and SVM schemes in detecting mobile Botnet

    최병하 , Kyungsan CHO | 2014, 19(4) | pp.81~90 | number of Cited : 1
    Abstract PDF
    As mobile devices have become widely used and developed, PC based malwares can be movingtowards mobile-based units. In particular, mobile Botnet reuses powerful malicious behavior ofPC-based Botnet or add new malicious techniques. Different from existing PC-based Botnetdetection schemes, mobile Botnet detection schemes are generally host-based. It is because mobileBotnet has various attack vectors and it is difficult to inspect all the attack vector at the sametime. In this paper, to overcome limitations of host-based scheme, we compare two network-basedschemes which detect mobile Botnet by applying HMM and SVM techniques. Through theverification analysis under real Botnet attacks, we present detection rates and detection properties of two schemes.
  • 11.

    The Grid Type Quadratic Assignment Problem Algorithm

    Sang-Un, Lee | 2014, 19(4) | pp.91~99 | number of Cited : 2
    Abstract PDF
    TThis paper suggests an heuristic polynomial time algorithm to solve the optimal solution forQAP (quadratic assignment problem). While Hungarian algorithm is most commonly used for alinear assignment, there is no polynomial time algorithm for the QAP. The proposed algorithmderives a grid type layout among unit distances of a distance matrix. And, we apply max-flow/min-distance approach to assign this grid type layout in such a descending order way that thelargest flow is matched to the smallest unit distance from flow matrix. Evidences from implementationresults of the proposed algorithm on various numerical grid type QAP examples show that asolution to the QAP could be obtained by a polynomial algorithm.
  • 12.

    Collaborative Learning System based on Augmented Reality for Enhancing Collaboration

    박병준 , BAEK, Yeong Tae , PARK SEUNGBO | 2014, 19(4) | pp.101~109 | number of Cited : 1
    Abstract PDF
    This paper aims to design and implement a collaborative learning system based on theaugmented reality. The existing augment reality-based learning systems have just focused oninteractivity between a system and learners without consideration of cooperability, thereby leadingto an ineffective approach to encouraging an learning system to be more supportive and conducive of and to cooperation among learners. The collaborative learning system is a learning method, withwhich learners achieve a common objective through critical thinking and cooperative teamwork soas to seek solutions to such fulfillment. This requires positive interdependence, proactiveinteractions, a sense of responsibility shared by individuals as well as the group, and developmentof teamwork among learners. Educators and systems assume a critical role in helping thecollaborative education be effective. An educator is responsible for defining a project at the outsetof learning activities, organizing groups for learners, and providing evaluation criteria applied to agroup's project activities. Meanwhile, a system shall support interactions to take place whilefacilitating learning activities. Furthermore, an educator shall provide a system for managing andevaluating activities involving interactions among learners. This paper suggests and embodies acollaborative learning system based on the augmented reality with consideration of theaforementioned collaborative education.
  • 13.

    The Design and Implementation of The Amendment Statement Automatic Generated System for Attached Tables in Legislation

    조성수 , 조대웅 , Myung Ho Kim | 2014, 19(4) | pp.111~122 | number of Cited : 2
    Abstract PDF
    Legislation are social norms that give directly or indirectly, huge impact on the social orcorporate, personal problems, unlike a normal document. Also, over time it has a featureconstantly changing by the laws enactment and amendment, repealed. The amendment statement automatic generated system is used for purpose of proclamation to those. However, existing systemis able to generate amendment statement just text body of law how compare and analyze thecurrent legislation and amendment legislation. However, actual legislation to be created attachedtable of the table form in complex structure besides simple text form as body text. In this paper, we additional implement attached table processing to existing the amendmentstatement automatic generated system that containing the table does not handle attached table. We were analyse to the amendment statement generated grammar and table structure in attachedtable of the legislation for processing to attached table. Also proposed a method to compareattached table in the table. So, it is enable the automatic generation with amendment statementwhich various forms of legislation the documents.
  • 14.

    The Difference Test among Job Types in the Impact of Social Welfare Worker's Person-Organization Fit on Service Satisfaction

    Shin Jung Suk , 박치면 , Hwie- Seo, Park | 2014, 19(4) | pp.123~130 | number of Cited : 3
    Abstract PDF
    This study is to review the standpoints for person and organization fit and suggest integratedstandpoint, and identify causal relationships between P-O fit and client service satisfaction andtest differences of casual relationships between job types through moderating effects of job types inthe relationships among variables, and suggest some implications based on the analytical results. For this study, sampling was conducted for social welfare workers. In this study, analytical results showed that P-O fit influences client's service satisfaction through job attitude. This studysuggested some implications on the base of analytical results.
  • 15.

    An Empirical Study on the Effects of the Competitiveness of Intermediate Products and Enterprise’s Core Competency on Customer Value and Enterprise Performance in Korean and Chinese Enterprises

    RHO, HYUNG JIN | 2014, 19(4) | pp.131~138 | number of Cited : 2
    Abstract PDF
    The purpose of this paper is to study the effects of the competitiveness of intermediate goodsand enterprise’s core competency on customer value and enterprise performance. And it is surelymeaningful to investigate the intermediate product competitiveness with the variable of interest torecent corporate values and corporate customers with business performance by exploring theirrelationships. This research focuses on the intermediate goods competitive dimension and thecompany's core competency, and then several models are proposed. The research model is based onthe existing core competencies of the conceptual model, which consists of intermediate goodscompetitive, core competencies, product innovation, product reliability, customer value andcorporate performance. The automobile company in China and Korea are focused in this paper;empirical analysis method is applied to examine the relationships in these areas. The concept of core competencies in the existing competitive enterprises in product and processis defined as the relative advantage. Eight hypotheses are introduced for statistical hypothesistesting. Employees and typical intermediate products in automotive companies in China and Koreaare investigated.
  • 16.

    Challenges in Accordance with Current Law by the Enforcement of the Medical Dispute Adjustment Act

    Joung Soon Hyoung | 2014, 19(4) | pp.139~147 | number of Cited : 2
    Abstract PDF
    Medical disputes the problem that occurs essentially among the rapidly increasing of thedemand for health care and the attention of the public health. The subject of dispute is mostlycriminal penalties and civil redress due to a physician's medical malpractice, resolved byagreement was prioritized. They trying to solve through the litigation and exercise the skills. But,the lack of clear standards and related legislation make difficult to solve the problem. for this, 「The Act of Medical Malpractice Damage's Relief and Mediation for Medical Dispute Resolution」(Medical Disputes Adjustment Act) was enacted in April 7, 2011 and performed in Apr. 8, 2012. To solve the problem autonomously between the parties. It is the legislative intent such asmediation or arbitration to solve the conflict between the parties. But there are some problemsthat examined from the perspective of constitutional review with the criminal and civil problems. Therefore, this paper will find out the legal issues about Medical Dispute Adjustment Act and theconstitutional and civil issues. And want to expect to be prepared the more stable and efficientsolution of medical disputes.
  • 17.

    Art based STEAM Education Program using EPL

    전성균 , Lee Youngjun | 2014, 19(4) | pp.149~158 | number of Cited : 17
    Abstract PDF
    The rapidly changing 21st-century knowledge and information society is emphasizing convergededucation that crosses various academic fields. In particular, the society expected the cultivation ofthe talent who balance scientific creativity and artistic sensitivity by adding arts to the existingconverged education revolving around science and technology. However, at present, most STEAMeducation has been actively conducted with a focus on science and technology, whereas the subjectof arts has been regarded or utilized as a supplementary means. Its problem is that theeducational characteristics and values of art education have not been effectively utilized ineducational terms and this could lead to superficial integrated education. In this respect, this study had the knowledge of various fields, such as science, technology, and mathematics, utilizedusefully during the process of experiencing and creating arts. Accordingly, this study designed aneducation programs as with the case of Nam-Jun Baek who expanded the dominion of arts bycreatively utilizing his own time's scientific technologies. In this educational process, the targetprogram was developed in a manner that enables EPL to be utilized essentially as the study'sknowledge-based tool and medium. The results of applying this educational program in 5th-gradeelementary school students showed that the program has positive effects on the creative attributesof the students.