• Journal of the Korean Society for Library and Information Science
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• v.40 no.2
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• pp.389-414
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• 2006

This paper analyzes the current status of open access policies, publishing, and archiving in the field of medicine. Journals indexed in SCI are published by open access publishers such as BMC Ltd. and PLoS and then the research articles in those journals are archived in PMC and BMC. Also, funding institutions participate in developing open access as a new scholarly communication model and governments or independent funding institutions outside the country make policies for open access. But scholary communities in Korea do not develop their services in the level of a new scholarly communication model even though they open their journal articles on the homepages. This paper suggests several plans for the open access scholarly communication in the field of medicine in Korea.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.10
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• pp.190-196
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• 2014

This paper proposes a mobile-optimized pedestrian detection method using Cascade of HOG(Histograms of Oriented Gradients) for ADAS(Advanced Driver Assistance System) on smartphones. In order to use the limited resource of mobile platforms efficiently, the method is implemented by the OpenCL(Open Computing Language) library, and its processing time is reduced in the following two aspects. Firstly, the method sets a program build option specifically and adjusts work group sizes as variety of kernels in the host code. Secondly, it utilizes local memory and a LUT(Look-Up Table) in the kernel code to accelerate the program. For performance evaluation, the developed algorithm is compared with the mobile CPU-based OpenCV(Open Computer Vision) for Android function. The experimental results show that the processing speed is 25% faster than the OpenCV hogcascade.

• The KIPS Transactions:PartC
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• v.11C no.2
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• pp.163-170
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• 2004

The additional mechanism Is required to set up a secure connection among the communication subjects in the internet environment. Each entity should transfer and receive the encrypted and hashed data to guarantee the data integrity. Also, the mutual authentication procedure should be processed using a secure communication protocol. The SSL/TLS is a protocol which creates the secure communication channel among the communication subjects and sends/receives a data. Although the OpenSSL which implements the TLS is using by many developers and its stability and performance are proved, it has a difficulty in using because of its large size. So, this Paper designs and implements the secure communication which the users can use easily by modification works of OpenSSL library API. We proved the real application results using the DRM client/server case which supports a secure communication using the implemented API.

• The Korean Journal of Community Living Science
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• v.22 no.1
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• pp.115-129
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• 2011

The purpose of this study was to examine the effect of parenting behavior and parent-child communication on elementary school children's multiple intelligence. 321 children selected from two elementary schools and their mothers participated in the study. Data were collected using the multiple intelligence index, parenting behavior inventory and parent-child communication index. The data were statistically analyzed using the t-test, one-way ANOVA(Duncan test), and multiple regression analysis. The study showed that there were some significant differences in children's multiple intelligence according to the children's gender, income, mother and father's educational background. There were some significant differences in children's multiple intelligence according to the parenting behavior, warmth acceptance and permissiveness nonintervention behaviors, and to the parent-child open communication and problematic communication. It was also found that children's gender, family income, warmth acceptance behavior, permissiveness nonintervention behavior, open communication and problematic communication were all significant predictors of the children's multiple intelligence. Implications based on this study are as follows; in order to increase the children' multiple intelligence, parents should be warmer and more accepting and have open communication with their children.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.3
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• pp.911-931
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• 2021

Recently, most cloud services use Docker container environment to provide their services. However, there are no researches to evaluate the performance of communication libraries for multi-GPU based distributed deep learning in a Docker container environment. In this paper, we propose an efficient communication architecture for multi-GPU based deep learning in a Docker container environment by evaluating the performances of various communication libraries. We compare the performances of the parameter server architecture and the All-reduce architecture, which are typical distributed deep learning architectures. Further, we analyze the performances of two separate multi-GPU resource allocation policies - allocating a single GPU to each Docker container and allocating multiple GPUs to each Docker container. We also experiment with the scalability of collective communication by increasing the number of GPUs from one to four. Through experiments, we compare OpenMPI and MPICH, which are representative open source MPI libraries, and NCCL, which is NVIDIA's collective communication library for the multi-GPU setting. In the parameter server architecture, we show that using CUDA-aware OpenMPI with multi-GPU per Docker container environment reduces communication latency by up to 75%. Also, we show that using NCCL in All-reduce architecture reduces communication latency by up to 93% compared to other libraries.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.10
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• pp.2473-2481
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• 2014

The majority of next generation information systems will be working on portable mobile devices such as smartphones. REST Open API web services have quickly become popular among mobile application development. The use of REST web services are not only growing in popularity but totally changing the way of mobile applications development. This is because REST web services could be used in application development as a form of building blocks, which is completely independent, compatible, to any platforms. With this strength, REST web services encourage third party application to build add-on functionality. This research proposes the use of REST web service to replace the use of socket APIs into major internet communication APIs. To this end, this paper also provide performance evaluation of the REST web services compared to the conventional socket APIs, focusing on scalability by analytical and experimental evaluations. Finally, we summarize the possibility whether REST Open API web services have enough performance as future major internet communication primitive APIs.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10a
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• pp.621-624
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• 2000

메시지 전달 방식과 공유 메모리 방식은 병렬 컴퓨터 시스템을 위한 대표적인 아키텍쳐이다. 이 중 공유 메모리 방식은 프로그래밍의 용이함으로 인해 메시지 전달 방식에 비해 많이 채택되고 있는 실정이다. 하지만 하드웨어 벤더마다 각기 다른 공유 메모리 프로그래밍 인터페이스를 제공하기 때문에, 코드 호환성이 주 관심사인 경우에는 프로그래밍의 불편함을 감수하면서 MPI 나 PVM 등을 이용한 메시지 전달 구조를 채택하는 경우가 자주 발생한다. 본 논문에서는 공유 메모리 병렬 컴퓨터 시스템을 위한 프로그래밍 인터페이스 표준인 OpenMP 명세에 대해 고찰, 분석한 결과를 제시한다. OpenMP 명세의 등장 배경 및 발전 과정 등을 기술하고, OpenMP 명세의 분분별 규정 내용을 요약한다. 또한 OpenMP 명세에 따라 기존 C 프로그램을 수정한 예도 보인다. 본 논문의 목적은 OpenMP 라는 공유 메모리 프로그래밍 인터페이스 표준을 소개하고, 이에 대한 관심을 높임으로써 관련 연구를 활성화시키는데 있다.

• Journal of Elementary Mathematics Education in Korea
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• v.13 no.2
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• pp.141-161
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• 2009

Mathematical Communication ability can be more developed through sharing thoughts with others. Therefore when we instruct students in math, it is very important for teachers to provide them with opportunity to communicate mathematically. So this study provided open-ended problems in small-group collaborative learning. And we analyzed students' mathematical communication focused on the student's level of understanding. Furthermore, to improve students' mathematical communication ability, this study tries to attract the factors that we should consider the exact date for inserting the open-ended problems into a course of math and the student's level of understanding for selecting suitable open-ended problems.

• Korean Journal of Child Studies
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• v.33 no.2
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• pp.185-201
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• 2012

The purpose of the present study was to investigate the structural relationships between adolescent problem behaviors and related variables. The subjects of this study consisted of 250 to second graders from a middle school in S city in the Gyeongbuk province of South Korea. The sample variance-covariance matrix was analyzed using AMOS 20.0, and a maximum likelihood minimization function. The results were as follows : First, marital conflict in terms of the father's open communication model indicated both a direct and indirect effect upon adolescent problem behaviors. Marital conflict in terms of the father's problematic communication model revealed an indirect effect upon adolescent problem behaviors also indicated that these behaviors were also mediated by the father's problems communication. Second, a open communication style on the part of the father indicated a partially mediating effect on the relationship between marital conflict and adolescent problem behaviors. The problematic communication model on the part of the father revealed a very clear mediating effect on the relationship between marital conflict and adolescent problem behaviors.

• The Korean Journal of Community Living Science
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• v.26 no.4
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• pp.617-632
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• 2015

This study examines the effects of paternal parenting behaviors, child-rearing involvement, and father-child communication perceived by children on their leadership. A total of 197 children selected from three elementary schools and their fathers participated in this study. Data were collected using a parenting behavior index, a child-rearing involvement inventory, a father-child communication inventory, and a children's leadership index and statistically analyzed using the t-test, a one-way ANOVA ($Scheff{\acute{e}}$ test), and a multiple regression analysis. The results show significant differences in children's leadership according to the father's education level, family income, the father's warmth/acceptance, the father's family activity involvement, and open/problematic communication between the father and the child. The child's age, the father's education level, family income, the father's warmth/acceptance, open communication, and problematic communication were significant predictors of the child's leadership. These results suggest that a child's leadership may be strengthened if the father is warmer and more accepting and has open communication with the child.