• 반도체디스플레이기술학회지
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• 제12권4호
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• pp.33-38
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• 2013

Image retrieval is one of the most exciting and fastest growing research fields in the area of multimedia technology. As the amount of digital contents continues to grow users are experiencing increasing difficulty in finding specific images in their image libraries. This paper proposes an efficient image descriptor which uses a local color and texture in the non-overlapped block images. To evaluate the performance of the proposed method, we assessed the retrieval efficiency in terms of ANMRR with common image dataset. The experimental trials revealed that the proposed algorithm exhibited a significant improvement in ANMRR, compared to Dominant Color Descriptor and Edge Histogram Descriptor.

• Journal of Information Science Theory and Practice
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• 제9권4호
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• pp.63-74
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• 2021

Virtual Reality (VR) is one of the core components of the fourth industrial revolution as a technology that makes the virtual world feel as if it is real. VR is being used in various fields such as entertainment, advertisement, education, medical care, training, sports, and tourism, as well as providing contents for such things as games and videos. Libraries are already looking for ways to utilize VR from various angles, such as operating experiential programs. The purpose of this thesis is to develop and propose a VR-based library user education program. In order to achieve the purpose of the study, we analyzed previous studies from a theoretical perspective to find a way to construct a user education program, and also to derive possible implications based on examples of countries such as the United States and Korea that are already introducing and applying VR technology to library services. Therefore, the user education program proposed in this study can be used as a basic building block when many libraries want to develop VR-based programs in the future.

• 방송공학회논문지
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• 제14권5호
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• pp.543-550
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• 2009

가장 많이 사용되는 변환영역 컨벌루션 알고리즘인 중칩보류기법의 경우 데이터를 M개 단위로 처리하고자 할 때 현재 M개의 데이터를 앞의 M개의 데이터와 연결시킨 2M개의 데이터에 대하여 길이 2M FFT와 주파수 영역 곱셈을 수행하고 뒤의 M개의 데이터를 취함으로써 선형 컨벌루션 결과를 얻는다. 본 논문에서는 새로운 변환을 제시하고 이를 이용하여 M개의 데이터에 대하여 길이 M의 변환을 수행하면 되는 새로운 컨벌루션 알고리즘을 소개한다. 새로 제안된 변환은 M개의 곱셈과 고속 푸리에 변환의 계산으로 이루어지므로 기존의 FFT 라이브러리 또는 하드웨어를 그대로 사용할 수 있다. 또한 기존의 중첩보류기법에 비하여 약간의 계산량 감소가 있고 다루어야 하는 데이터의 길이가 반이므로 데이터 이동 및 기타 처리에서도 이득이 있어서 전체적인 CPU 시간이 줄어든다.

• International Journal of Computer Science & Network Security
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• 제21권7호
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• pp.241-248
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• 2021

Open-source software developments are basically Internet-based communities that voluntarily collaborate in developing software on the Internet and such Internet communities have become an important cultural and economic phenomenon. As a result, the emergence of open-source software has presented a challenge to the traditional offerings by providing free alternatives. The objective of this article is to review the possibility of the adoption of open source software in the creation of digital libraries, highlights advantages and disadvantage preservations. Among our objective also explaining the request of such software at the present time and the criteria evaluated in the digital preservation through surveying the best open source software from the reality of intellectual production, and standards that are being built to evaluate and choose what software to create a digital library without other software available. To achieve the above objectives, we shed the light on the top 11 open-source software to manage Libraries in addition to standards that may represent the basic building block for the selection of the appropriate systems to the needs of the digital library. This article relied on the descriptive approach by reviewing a series of studies and scientific research works related to the subject of the current study. Accordingly, the most prominent of the findings of this work is its illustration of the close association between open source software and the library community, both of which represent free culture. Also it is shown that the selection process of open source software has some obstacles most notably as there are no clear and reliable criteria for selecting these systems. Current study has concluded a set of recommendations, notably awareness of the role and importance of open source software and the facilities it provides in managing digital content.

• 한국실내디자인학회논문집
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• 제13호
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• pp.111-116
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• 1997

For the purpose of easy approach, social welfare facilities that have close relation to local society establish welfare facilities, as schools, religious faciliteis, town-block offices, libraries, etc. Especially the church neighboring the region can use regional resources in human power, facilities, financial power. So the purpose of this research is to investigate the concept and sort of religious facilities and regional connection and present the direction of social welfare facilites plan through the case study of social welfare faciliteis performing public welfare work, attached to church.

• Nuclear Engineering and Technology
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• 제54권11호
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• pp.4280-4295
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• 2022

In this paper, a new multi-group neutron-gamma transport calculation code system STRAUM-MATXST for complicated geometrical problems is introduced and its development status including numerical tests is presented. In this code system, the MATXST (MATXS-based Cross Section Processor for S_N Transport) code generates multi-group neutron and gamma cross sections by processing MATXS format libraries generated using NJOY and the STRAUM (S_N Transport for Radiation Analysis with Unstructured Meshes) code performs multi-group neutron-gamma coupled transport calculation using tetrahedral meshes. In particular, this work presents the recent implementation and its test results of the Krylov subspace methods (i.e., Bi-CGSTAB and GMRES(m)) with preconditioners using DSA (Diffusion Synthetic Acceleration) and TSA (Transport Synthetic Acceleration). In addition, the Krylov subspace methods for accelerating the energy-group coupling iteration through thermal up-scatterings are implemented with new multi-group block DSA and TSA preconditioners in STRAUM.

• 인터넷정보학회논문지
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• 제20권4호
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• pp.29-38
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• 2019

현재 정보사회는 빠르게 격변하며 다양한 분야에서 혁신과 창의성을 요구하고 있으며 논리적 사고의 근간이 될 수 있는 수학의 중요성이 강조되고 있다. 본 논문의 목적은 아동들에게 수학 학습에 대한 동기와 흥미를 유발하기 위해 아동들이 손쉽게 사용할 수 있는 교구를 이용하여 수학영역의 논리적인 사고가 더욱 확장되고 자발적 학습이 일어날 수 있는 수학교육 애플리케이션을 개발하는 것이다. 본 논문에서는 스마트 기기와 블록을 이용하여 수학 교육 애플리케이션을 설계하고 구현하였다. 애플리케이션의 주 기능은 카메라를 이용한 촬영과 수식 계산 값 확인이다. 아동이 산수 교육용 블록을 이용해 수식을 만든 뒤 카메라를 이용하여 블록을 촬영하면 자신이 만든 수식의 계산 값을 직접 확인할 수 있다. 촬영한 이미지의 전 처리 과정과 텍스트 추출, 문자인식은 OpenCV 라이브러리와 Tesseract-OCR 라이브러리로 구현하였다.

• 정보보호학회논문지
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• 제18권3호
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• pp.23-32
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• 2008

그래픽 프로세서(GPU)의 연산 능력은 이미 CPU를 능가하고 있으며, 그 격차는 점점 벌어지고 있다. 따라서, 범용 계산에 그래픽 프로세서를 활용하는 GPGPU 연구가 활발히 전개되고 있으며, 병렬 처리가 필요한 분야에서 특히 두드러진 성과를 보이고 있다. GPU를 이용한 암호 알고리즘의 구현은 2005년 Cook 등에 의하여 처음 시도되었으며, OpenGL, DirectX 등의 라이브러리를 이용하여 개선된 결과들이 속속 발표되고 있다. 본 논문에서는 2007년 발표된 NVIDIA의 CUDA 라이브러리를 이용한 블록암호 구현 기법과 그 결과를 소개하고자한다. 또한, 소프트웨어로 구현된 블록암호 소스를 GPU 프로그램으로 이식하는 일반적인 방법을 제공하고자 한다. 8800GTX GPU에서 블록암호 AES, ARIA, DES를 구현했으며, 속도는 각각 4.5Gbps, 7.0Gbps, 2.8Gbps로 CPU보다 고속 구현이 가능하였다.

• 제어로봇시스템학회논문지
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• 제15권9호
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• pp.946-951
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• 2009

The small multi-jointed robots for most education are developed with the way of firmware. But the firmware may be very difficult to develop as gradually increasing throughputs and control routines. Due to limit of firmware we try to use on RTOS, but hard to adapt on the small multi-jointed robots. It would be hard to install RTOS into the small multi-jointed robots because of the size capacity of RTOS, and lack of libraries for control of the particular hardware. Moreover, even its RTOS with many functions causes its to make overheads scheduling, TCB (Task Control Block), and task states. Also to keep maintenance of RTOS, it is composed of components for the whole structure of my proposed RTOS. Additionally, We provided with libraries of servo motor and sensor control and developed RMS (Rate Montonic scheduler) to handle tasks on real time and reduce overheads. Therefore, It is possible to work the fixed priority and task preemptive way. We show one example of the multi-jointed robot installed with my proposed RTOS, which shows to obstacle avoidance and climbing up the slope.

• Journal of information and communication convergence engineering
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• 제7권3호
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• pp.275-280
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• 2009

While database(DB) and information retrieval(IR) have been developed independently, there have been emerging requirements that both data management and efficient text retrieval should be supported simultaneously in an information system such as health care, customer support, XML data management, and digital libraries. The great divide between DB and IR has caused different manners in index maintenance for newly arriving documents. While DB has extended its SQL layer to cope with text fields due to lack of intact mechanism to build IR-like index, IR usually treats a block of new documents as a logical unit of index maintenance since it has no concept of integrity constraint. However, In the DB-IR integrations, a transaction on adding or updating a document should include maintenance of the posting lists accompanied by the document. Although DB-IR integration has been budded in the research filed, the issue will remain difficult and rewarding areas for a while. One of the primary reasons is lack of efficient online transactional index maintenance. In this paper, performance of a few strategies for per-document basis transactional index maintenance - direct index update, pulsing auxiliary index and posting segmentation index - will be evaluated. The result shows that the pulsing auxiliary strategy and posting segmentation indexing scheme, can be a challenging candidates for text field indexing in DB-IR integration.