• 대한전자공학회논문지SD
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• 제40권11호
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• pp.45-53
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• 2003

DRAM에서 사용되는 내부 승압 전원 전압과 기판인가 전원 전압 발생기를 공유함으로써 단일 Charge Pump에서 승압 전원과 기판 전원을 동시에 발생시키는 회로를 설계하였다. 이 회로는 0.14um의 DRAM 공정을 사용하여 기존 보다 전력 소모를 30%, 전체 면적을 40% 그리고 Pumping capacitor 면적을 29.6% 각각 감소하였으며 또한 전류 공급 효율을 13.2% 향상 시켰다. Charge Recycling 기법을 적용하여 Pumping capacitor의 Precharge 구간 동안 소모되는 전류를 75% 감소하였다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 추계학술대회
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• pp.584-586
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• 2017

본 논문에서는 인터넷 장치의 보안을 위해 경량 대칭 암호화와 경량 인증을 통합 한 하드웨어 아키텍처를 제안한다. 암호화 핵심은 PRESENT 알고리즘과 제안된 새로운 경량 암호화 알고리즘으로 구성된다. 또한 HB 및 HB +, HB-MP, HB-MP + 인증 알고리즘들을 포함한다. 통합 보안 시스템은 Verilog HDL을 사용하여 설계되었으며 Modelsim SE 및 Xilinx Design Suite 14.3 프로그램을 사용하여 검증 및 합성되었다. 제안하는 암호화 코어 하드웨어 구조는 Spartan6 FPGA 장치에서 합성한 결과 189Mhz 주파수와 1130개 슬라이스를 가진다.

• 대한임베디드공학회논문지
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• 제6권3호
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• pp.190-200
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• 2011

Android platform provides a content provider and a cursor mechanism to access the internal SQLite engine. Content providers not only store and retrieve data but also make it accessible to applications. Applications can only share data through content provider, since there's no common storage area that Android packages can access. Cursor is an interface that provides random read-write access to the result set returned by a database query. However, this cursor possesses two major limitations. First, a cursor does not support a join clause among cursors, since the cursor can only access a single table in the content provider. Second, the cursor is not capable of creating user-customized field in the predefined content providers. In this paper, we propose the unified cursor architecture that merges several cursors into a single virtual cursor. Cursor translation look-aside buffer (TLB), column windowing mechanism and virtual data management are the three major techniques we have adopted to implement our structure. And we also propose a delayed synchronization method between an application and a proposed unified cursor. An application can create a user-customized field and sort multiple tables using a unified cursor on Android platform.

• 한국컴퓨터정보학회논문지
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• 제24권3호
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• pp.77-86
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• 2019

The advent of Internet of Things (IoT) makes common nowadays computing environments involving programming not a single computer but several heterogeneous distributed computers together. Developing programs separately, one for each computer, increases programmer burden and testing all the programs become more complex. To address the challenge, this paper proposes an RPC-based unified programming language, UniPy, for development of MGC (eMbedded, Gateway, and Cloud) applications in IoT systems configured with popular computers such as Arduino, Raspberry Pi, and Web-based DB server. UniPy offers programmers a view of classes as locations and a very simple form of remote procedure call mechanism. Our UniPy compiler automatically splits a UniPy program into small pieces of the program at different locations supporting the necessary RPC mechanism. An advantage of UniPy programs is to permit programmers to write local codes the same as for a single computer requiring no extra knowledge due to having unified programming models, which is very different from the existing research works such as Fabryq and Ravel. Also, the structure of UniPy programs allows programmers to test them by directly executing them before splitting, which is a feature that has never been emphasized yet.

• Architectural research
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• 제18권1호
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• pp.39-47
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• 2016

A finite element analysis technology applicable to the prediction of the static nonlinear response of cable roof structure is presented. The unified kinematic description is employed to formulate the present cable element and different strain definitions such as Green-Lagrange strain, Biot strain and Hencky strain can be adopted. The Newton-Raphson method is used to trace the nonlinear load-displacement path. In the iteration process, the compressive stress of a cable element is not allowed. For the verification of the present cable element, four numerical examples are tackled. Finally, numerical results obtained by using the present cable element are provided as new benchmark test results for cable structures under static loads.

• 한국정보시스템학회지:정보시스템연구
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• 제16권1호
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• pp.111-133
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• 2007

The purpose of this study is to present a new function point estimation approach for the Object-Oriented information systems. In order to fulfill this purpose, we first review the literature on Function Point Analysis of IFPUG, Unified Modeling Language, and Unified Process. Then, we derive a method and rules for estimating Function Points based on Use Cases and Class Diagrams. To analyze the appropriateness of the proposed approach, we conduct the empirical testing. 143 use cases are collected from production, marketing, distribution, sales, and other areas from the Object-Oriented systems development projects. We compare our new approach with the existing methods that are usually used for traditional systems development projects. The results show that our proposed approach is more appropriate for the Object-Oriented environment.

• Journal of information and communication convergence engineering
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• 제9권2호
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• pp.177-182
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• 2011

Considerations for user-centric environments are regarded as essential for the successful deployment of convergence services in BcN. Event driven service (EDS) is regarded as a typical convergence service converging different functions of multiple service providers to support user-centric environments. This paper first describes the deployment model and service scenario of EDS, a convergence service for user-centric environments in BcN. The user-centric environments stimulates the unified identifier management, namely unified identification (U-ID), to enable users to be provided convergence services without awareness of multiple providers. Then the designed structure and implementation results are given.

• 항공우주정책ㆍ법학회지
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• 제26권2호
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• pp.181-202
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• 2011

In the recent years, China's aviation industry has gained visible progress. Meanwhile, China's aviation law system has become more and more complete. However, in this system, many problems still exist, especially lacking a unified aviation law, which limits the development of China aviation industry, general aviation in particular, and hinders the economic growth. This article aims to raise the basic structure of China's unified aviation law system and proposals on the basis of analysis on the existing problems in our current aviation law system.

• Journal of Information Science Theory and Practice
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• 제4권4호
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• pp.4-15
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• 2016

Information needs of users have been examined both generally and as they pertain to particular types and formats of information. Barriers to information have also been investigated, including those which are situational and also across certain domains and socioeconomic contexts. Unified studies concerning both information needs and barriers are needed. Both are likely always present in any given interactive search situation; further, users' attempts to satisfy their own individualized information needs will likely encounter barriers of some sort. The present study employed a survey method to collect users' perceptions of video information needs and barriers as part of recent video search situations. Findings from this analysis establish a unified framework, based on the themes emerging directly from the responses of users, and present the suitability and benefit for informing future designs and evaluations of user-centered interactive retrieval tools.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2003년도 Proceeding
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• pp.127-138
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• 2003

Although the research on electronic commerce is plentiful, there is little empirical research related to Web-Based Shopping Systems (WBSS). This is especially so in global electronic commerce circumstances. WBSS are the fastest growing segment of digital economies and are perceived as driving forces of electronic commerce in terms of global markets and digital business. Using WBSS, organizations have a new chance of their business evolving successfully as global marketers. This paper develops a unified model to assess the diffusion of WBSS. Factors that impact WBSS diffusion are identified and analyzed as the basis for empirical testing. A set of propositions is developed that allows operationalization of the model. The ultimate goal is to provide the new research insights for the academic circles and the practical guidelines for organizations wishing to undertake WBSS.