• 한국정보통신학회논문지
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• 제10권5호
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• pp.812-820
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• 2006

최근 대부분의 전송기술(LAN 뿐만 아니라 MAN과 WAN까지)이 이더넷으로 통일되는 경향에 힘입어, 예전에 비하여 이더넷은 대단한 주목을 받게 되었다. 하드웨어 설계를 위해 10Gbps 이더넷 Data Link 계층의 MAC 코어를 C언어를 이용하여 성능평가를 실시하여 내부 FIFO의 크기를 도출하였다. 본 논문에서는 VHDL 언어와 Xilinx ISE 6.2i 툴을 이용하여 상위 계층 인터페이스, 전송엔진, 플로우 컨트롤 블록, 수신엔진, 정합 부계층(Reconciliation Sublayer), 초기설정 블록, 상태전송 블록, XGMII 인터페이스 블록으로 구성되는 10Gbps 이더넷용 MAC(Media Access Control)코어를 설계하여 Model_SIM 5.7G 시뮬레이터를 이용하여 검증하였다. 10Gbps 이더넷의 권고안에서는 10Gbps를 지원하기 위해 64비트 데이터 패스를 갖는 MAC 코어는 156.25MHz를 지원해야 하는데, 설계된 MAC 코어는 64비트의 데이터를 처리하고 168.549MHz를 지원하여 최대 10.78Gbps의 데이터 처리를 지원한다. 이는 100bps 이상의 고속의 데이터 처리가 요구되는 응용분야에 적합하다.

• 한국정보통신학회논문지
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• 제9권3호
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• pp.547-554
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• 2005

최근 대부분의 전송기술이 이더넷으로 통일되는 경향에 힘입어, 예전에 비하여 이더넷은 대단한 주목을 받고 있다. 본 연구에서는 최적의 MAC 코어 설계에 대해 연구하였는데, 이는 상위 계층 인터페이스, 전송엔진, 플로우 컨트롤 블록, 수신엔진, 정합 부계층, 초기설정 블록, 상태전송 블록, XCMII 인터페이스 블록으로 구성된다. 하드웨어 설계를 위해 10Gbps 이더넷 Data Link 계층의 MAC 코어를 C언어로 성능평가를 실시하여 내부 GIFO와 파라미터 초기값을 도출하였다 내부 FIFO는 $95\%$의 트래픽이 발생시 512 크기로 사용 가능하고, $97\%$의 트래픽이 발생시에는 1024 크기가 적합하였다. 성능결과를 토대로, VHDL 언어로 설계하여 검증하였다. 설계된 MAC 코어는 64비트의 데이터를 처리하고 168.549MHz를 지원하여 전송효율이 최대 10.78Gbps까지 지원하므로, 10Gbps 이더넷의 스위칭 장비의 인터페이스 모듈로 응용이 가능하다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.69.2-69
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• 2002

Process measurements contain random and gross errors and the size estimation of gross errors is required for production accounting. Mixed integer programming technique had been applied to identify and estimate the gross errors simultaneously. However, the compensate model based on mixed integer programming used all measured variables or spanning tree as gross error candidates. This makes gross error estimation problem combinatorial or computationally expensive. Mixed integer programming with test statistics is proposed for computationally inexpensive gross error identification /estimation. The gross error candidates are identified by measurement test and the set of gross error candidates are...

• Asia pacific journal of information systems
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• 제16권4호
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• pp.151-178
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• 2006

The objective of this research is to develop a formal framework and methodology to facilitate real-time data integration, thus enabling semantic interoperability among distributed and heterogeneous information systems. The proposed approach is based on the concepts of "ontology" and "semantic mediators." An ontology is developed and used to capture the intension (including structure, integrity rules and meta-properties) of the database schema. We also develop the agent communication protocol for semantic reconciliation, which is based on the theory of speech acts and agent communication language. This protocol is used by a set of semantic mediators, which automatically detect and resolve various semantic conflicts at the data- and schema-levels by referring to the ontology. A mediation-based query processing technique is developed to provide uniform and integrated access to the multiple heterogeneous information sources. Prototype tools are being implemented to provide proof of concept for this work.

• ETRI Journal
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• 제35권1호
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• pp.146-149
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• 2013

We propose a reconciliation sublayer (RS)-based lane and traffic control protocol for energy-efficient 40-G/100-G Ethernet. The RS performs active/inactive lane control and data rate adaptation depending on active lane information received from the upper layer. This protocol does not result in a processing delay in the media access control layer, nor is an additional buffer required at the physical layer for dynamic lane control. It ensures minimal delay and no overhead for the exchange of control frames and provides a simple adaptive data rate.

• 한국산학기술학회논문지
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• 제15권3호
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• pp.1650-1662
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• 2014

본 연구는 고위험약물의 투약조정을 위한 스마트 폰 어플리케이션의 내용을 구축하고 개발된 어플리케이션의 만족도를 평가하기 위해 수행되었다. xcode 4.5와 ios 6.1 SDK(software development kit)을 이용하여 시스템을 구축하였다. 4주간의 중재 후 35명의 중환자실 간호사들에게 기능적, 내용적, 화용적 측면의 만족도를 물었다. 또한 하루의 사용횟수와 사용의 빈도에 따른 만족도의 차이를 평가하였다. 이를 위해서는 SPSS WIN 18.0을 활용하여 서술적 분석, ANOVA를 적용하였다. 약물계산 식을 개발하고 과다 혹은 과소 용량에 대한 알람을 주는 과정을 개발하였고, 고위험 약물에 대한 정보를 구축하였다. 만족도와 관련된 문항 중 이 어플리케이션은 약물계산을 수행하는데 도움이 된다는 문항이 3.14점이었으나 이 어플리케이션에 만족한다는 문항은 2.94에 그쳤다. 하루의 사용횟수와 사용빈도와 관련해서 만족도의 차이는 없었다. 이 연구의 결과에 근거할 때 추후 더욱 진보된 고위험약물을 위한 투약조정용 스마트폰 어플리케이션은 환자안전을 위한 중요한 기반을 제공해 줄 수 있을 것이다.

• Biotechnology and Bioprocess Engineering:BBE
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• 제10권5호
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• pp.408-417
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• 2005

Increasing numbers of value added chemicals are being produced using microbial fermentation strategies. Computational modeling and simulation of microbial metabolism is rapidly becoming an enabling technology that is driving a new paradigm to accelerate the bioprocess development cycle. In particular, constraint-based modeling and the development of genome-scale models of industrial microbes are finding increasing utility across many phases of the bioprocess development workflow. Herein, we review and discuss the requirements and trends in the industrial application of this technology as we build toward integrated computational/experimental platforms for bioprocess engineering. Specifically we cover the following topics: (1) genome-scale models as genetically and biochemically consistent representations of metabolic networks; (2) the ability of these models to predict, assess, and interpret metabolic physiology and flux states of metabolism; (3) the model-guided integrative analysis of high throughput 'omics' data; (4) the reconciliation and analysis of on- and off-line fermentation data as well as flux tracing data; (5) model-aided strain design strategies and the integration of calculated biotransformation routes; and (6) control and optimization of the fermentation processes. Collectively, constraint-based modeling strategies are impacting the iterative characterization of metabolic flux states throughout the bioprocess development cycle, while also driving metabolic engineering strategies and fermentation optimization.

• 대한간호학회지
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• 제43권3호
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• pp.431-441
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• 2013

Purpose: The study was done to explore meanings and essence of the experience in South Korea of men defectors from North Korea. Methods: Data were collected from March, 2011 to May, 2012, through in-depth interviews with ten men defectors. Data analysis was conducted using the process of hermeneutic phenomenological reflection. Results: Eight essential themes were extracted; 'buoyant expectation for a new life', 'feeling guilty about family left behind in North Korea', 'inability to become acclimatized due to communication difficulties', 'inability to socialize with South Koreans due to different lifestyles', 'finding strength through trustworthy acquaintances', 'continuing reconciliation with oneself while trying to assimilate into South Korean culture', 'self-realization of one's original self', and 'continuing to feel out the possibility of a future in South Korea'. Conclusion: The findings indicate that North Korean men who defect to South Korea shape their identity through three phases: forming self-image during escape from North Korea, trying to become accustomed to South Korean society, and finding their own identity by self-realization of their original self. Eventually, the whole process enables them to recover their identity, to feel a sense of belonging, and to discover possibilities for a better future.

• Asian Pacific Journal of Cancer Prevention
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• 제16권15호
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• pp.6605-6608
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• 2015

Background: Colorectal cancer is a major cause of morbidity and mortality throughout the world. Colorectal cancer screening is an optimal way for reducing of morbidity and mortality and a clinical decision support system (CDSS) plays an important role in predicting success of screening processes. DSS is a computer-based information system that improves the delivery of preventive care services. The aim of this article was to detail engineering of information requirements and work flow design of CDSS for a colorectal cancer screening program. Materials and Methods: In the first stage a screening minimum data set was determined. Developed and developing countries were analyzed for identifying this data set. Then information deficiencies and gaps were determined by check list. The second stage was a qualitative survey with a semi-structured interview as the study tool. A total of 15 users and stakeholders' perspectives about workflow of CDSS were studied. Finally workflow of DSS of control program was designed by standard clinical practice guidelines and perspectives. Results: Screening minimum data set of national colorectal cancer screening program was defined in five sections, including colonoscopy data set, surgery, pathology, genetics and pedigree data set. Deficiencies and information gaps were analyzed. Then we designed a work process standard of screening. Finally workflow of DSS and entry stage were determined. Conclusions: A CDSS facilitates complex decision making for screening and has key roles in designing optimal interactions between colonoscopy, pathology and laboratory departments. Also workflow analysis is useful to identify data reconciliation strategies to address documentation gaps. Following recommendations of CDSS should improve quality of colorectal cancer screening.

• 제어로봇시스템학회논문지
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• 제6권12호
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• pp.1113-1119
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• 2000

To operate a process plant safely and economically, process monitoring is very important. Process monitoring is the task to identify the state of the system from sensor data. Process monitoring includes data acquisition, regulatory control, data reconciliation, fault detection, etc. This research focuses on the data recon-ciliation using scale-space filtering and fault detection using functional-link associative neural networks. Scale-space filtering is a multi-resolution signal analysis method. Scale-space filtering can extract highest frequency factors(noise) effectively. But scale-space filtering has too large calculation costs and end effect problems. This research reduces the calculation cost of scale-space filtering by applying the minimum limit to the gaussian kernel. And the end-effect that occurs at the end of the signal of the scale-space filtering is overcome by using extrapolation related with the clustering change detection method. Nonlinear principal component analysis methods using neural network have been reviewed and the separately expanded functional-link associative neural network is proposed for chemical process monitoring. The separately expanded functional-link associative neural network has better learning capabilities, generalization abilities and short learning time than the exiting-neural networks. Separately expanded functional-link associative neural network can express a statistical model similar to real process by expanding the input data separately. Combining the proposed methods-modified scale-space filtering and fault detection method using the separately expanded functional-link associative neural network-a process monitoring system is proposed in this research. the usefulness of the proposed method is proven by its application a boiler water supply unit.