• Journal of the Korea Society of Computer and Information
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• v.19 no.12
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• pp.359-368
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• 2014

Process synchronization is one of the most difficult subject for students learning the Operating System courses. It is due to the fact that concurrent process environment, where many events occur at the same time, is difficult to understand for ordinary human who thinks only one thing at a time. Classical synchronization examples like the Bounded buffer problem or the Dining philosopher problem fail to hook attention and interest from lower grade students who just begin to study the Operating System courses in college because these examples are either too technical or too unrealistic. In this paper we propose another synchronization example named the Bank account problem as an alternative to the classical ones. Bank account problem is proved to succeed getting high interest and understanding from the student as it is easy and realistic, and almost every student has the experience using bank account in real life. Various synchronization subjects including controlling the execution sequence of each process, incorrect result due to the race conditions, use of semaphores, deadlock, and monitor are considered to apply them to the Bank account problem.

• The Journal of Korean Association of Computer Education
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• v.21 no.4
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• pp.11-20
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• 2018

This study is to propose a problem bank of problem solving programming using Online Judge System as one of the ways to motivate learners and increase for immersion to students who take Data Structure lecture that is the basis of problem solving ability using information science. In order to do this, we developed a question bank for each major topic in the Data Structure, by developing 70 problem solving programming problems suitable for the main topics of the Data Structure. By mounting it on an Online Judge System and applying to actual classes, and by analyzing the motivation for learning and the degree of immersion according to the result after the application of the lesson, we propose a teaching-learning contents and usage for problem solving programming and Data Structure classes at the teacher training university which give motivation for learning and immerse in problem solving programming.

• Journal of Industrial Convergence
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• v.17 no.2
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• pp.1-7
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• 2019

The Kakao bank can be conveniently used if there are only smartphones, identity cards, and bank accounts. However, a few days before the inauguration of Kakao Bank, the company opened an account for receiving loans from other people. In order to avoid such cases, the financial transactions will be detected if the SDS is withdrawn at a short interval of time. The detection system of FDS has four functions which are monitoring and auditing, collection, analysis, and response. There are security problems of the cocoa banks in various directions. The Kakao bank has a way to respond to the problem using FDS.: Keywords : Cocoa bank, security issues, information protection, FDS

• Journal of the Korean Operations Research and Management Science Society
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• v.37 no.2
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• pp.17-29
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• 2012

We examine a mortgage bank's incentive distortion problem when the bank sells its existing loan through MBS(Mortgage-Backed Security), considering the mortgage market structure and varying investors' risk attitude. Main findings in our comparative statics are the followings. The bank's monitoring incentive on the loan sold is distorted downwards when the deposit interest rate is lower than the coupon rate of MBS. Credit enhancement associated with the loan sale may mitigate the incentive distortion problem. However, the downward distortion of monitoring incentive does not disappear unless the credit enhancement, a loan guarantee, is provided up to 100%. Finally as the investors' risk preference changes from risk-neutral to risk-averse type, the incentive distortion problem becomes more severe. At the end, we recommend the introduction of covered bond in order to mitigate the incentive distortion problem, which is inevitable to current pass-through MBS.

• JSTS:Journal of Semiconductor Technology and Science
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• v.15 no.6
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• pp.634-646
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• 2015

Coarse-Grained Reconfigurable Architecture (CGRA) is a very promising platform that provides fast turn-around-time as well as very high energy efficiency for multimedia applications. One of the problems with CGRAs, however, is application mapping, which currently does not scale well with geometrically increasing numbers of cores. To mitigate the scalability problem, this paper discusses how to use the SIMD (Single Instruction Multiple Data) paradigm for CGRAs. While the idea of SIMD is not new, SIMD can complicate the mapping problem by adding an additional dimension of iteration mapping to the already complex problem of operation and data mapping, which are all interdependent, and can thus significantly affect performance through memory bank conflicts. In this paper, based on a new architecture called SIMD reconfigurable architecture, which allows SIMD execution at multiple levels of granularity, we present how to minimize bank conflicts considering all three related sub-problems, for various RA organizations. We also present data tiling and evaluate a conflict-free scheduling algorithm as a way to eliminate bank conflicts for a certain class of mapping problem.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.797-801
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• 2002

Information network technologies introduce a new education environment. Cyber education is growing rapidly as a field of practice especially in distance education system. The development of multimedia environment based on such technology as graphics, image, voice, and video, personal computer systems use has become the media for interactive teaching-teaming service. These features have made integrated multimedia education feasible. This research suggested a direction for the development of an interactive distance education system. I have developed an education system which cooperate problem bank and learning system. This system support arbitration of the relative difficulty in the problem bank database. An ongoing version of this research was evaluated. Those findings reveal several factors that influence how the proposed system can be tailored to the students' perspectives in order to come up with the enhanced version of this system.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.12
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• pp.1149-1158
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• 2020

NPF Islamic banking needs to be resolved because it affects banking performance in terms of income and the quality of its productive assets. This study aims to solve problems of non-performing financing and assess and analyze whether the implementation of the Islamic Humanity model can reduce the problem of financing at Bank Syariah Mandiri Indonesia. The study uses qualitative method with Miles and Huberman approach for analizing data through four steps which are; (a) data collection (b) data reduction (c) data display, and (d) conclusion drawing/verification. The results of the study found non performing financing can be reduced with using a new approach namely the Islamic Humanity Approach, which is an interaction between several aspects, namely (a) spiritual aspects, (b) economic aspects, (c) social aspects, and (d) justice aspects. The Islamic humanity model carried out in problem-solving activities at Bank Syariah Mandiri Indonesia includes a friendly approach, communication and deliberation in a family, respect for people, empathy, the concept of justice, and the concept of prayer. Islamic humanity approach shows success in reducing non-performing financing. The research concluded Islamic humanity as a new approach to reduce non-performing financing at Bank Syariah Mandiri Indonesia and it can be implemented to all Islamic banking in Indonesia.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.22
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• pp.71-106
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• 2004

Todays, L/C transactions in international trade are governed by UCP 500 and eUCP. But UCP 500 and eUCP do not cover all legal problem of L/C transactions. Therefore choice of laws in international L/C transactions are occurred. U.S.A. has an enacted law (UCC ${\S}5-Letter$ of Credit) to govern L/C transaction. But other countries has no special enacted law to govern L/C transaction. The reason is that there are difference between legal attitude of U.S.A. and other countries. American law considers L/C as a special device made by merchants. Therefore U.S.A. applies UCC ${\S}5-Letter$ of Credit instead of general contract law. UCC ${\S}5-Letter$ of Credit includes provisions of warranties, remedies, and so on that UCP 500 and eUCP do not include. But the liabilities of the Issuing Bank on the wrongful dishonor in L/C transaction is very important legal problem. First, this study is to justify concepts of honor and dishonor, and sufficient conditions for dishonor of the issuing bank. in UCC. Second, this study is to examine closely the liabilities of the Issuing Bank on the wrongful dishonor in L/C transaction. Third, this study is suggest distinctive features on the Liabilities to wrongful dishonor of the issuing bank in UCC ${\S}5-Letter$ of Credit and our trader's matters to be attended to L/C transactions governed by UCC.

• The Journal of Korean Association of Computer Education
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• v.13 no.2
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• pp.45-57
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• 2010

In this paper, we propose a C_PBS(C Program Bank System) which can support effective learning of C language. C_PBS allows a variety of problem uses and provides 3 types of search method for user convenience. It also shows many useful facilities: a variety of answers to a problem, display of problems according to reference frequency, interesting problem list, and problem carts. Especially, with the addition of comments and reference to the problems and answers, it implements collective intelligence via mutual collaborative learning by supporting the philosophy of web 2.0: participation, sharing, and open.

• Korean Journal of Mathematics
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• v.28 no.3
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• pp.587-601
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• 2020

In this paper we propose a way of enhancing eigenvalue approximations with the Bank-Weiser error estimators for the P1 and P2 conforming finite element methods of the Laplace eigenvalue problem. It is shown that we can achieve two extra orders of convergence than those of the original eigenvalue approximations when the corresponding eigenfunctions are smooth and the underlying triangulations are strongly regular. Some numerical results are presented to demonstrate the accuracy of the enhanced eigenvalue approximations.