• 한국위성정보통신학회논문지
• /
• 제10권3호
• /
• pp.11-15
• /
• 2015

본 연구에서는 수재해 정보 플랫폼 내 자료처리 시스템 설계를 위해 자료처리 과정의 복잡도를 분석하고 이에 따른 설계 방안을 제시하였다. 일반적으로 자료를 수집하고 분석하는 시스템은 자료와 알고리즘의 자료처리 과정이 고정된 고정 자료-알고리즘 자료처리 방식을 사용한다. 하지만 시스템의 복잡도가 증가하면 자료처리 시스템에서 관리해야 하는 자료처리 과정의 수가 급증하는 문제가 발생한다. 이를 해결하기 위해 자료와 알고리즘 사이에 인터페이스가 존재하는 동적 자료-알고리즘 자료처리 방식을 적용할 수 있다. 각 방식의 장단점을 분석한 뒤, 수재해 정보 플랫폼에 최적화된 자료처리 시스템의 설계안을 제시할 수 있었다.

• Journal of Communications and Networks
• /
• 제12권4호
• /
• pp.334-345
• /
• 2010

In this paper, we study optimal tradeoffs of achievable throughput versus consumed power in wireless ad-hoc networks formed by a collection of multiple antenna nodes. Relying on adaptive modulation and/or dynamic channel coding rate allocation techniques for multiple antenna systems, we examine the maximization of throughput under power constraints as well as the minimization of transmission power under throughput constraints. In our examination, we also consider the impacts of enforcing quality of service requirements expressed in the form of channel coding block loss constraints. In order to properly model temporally correlated loss observed in fading wireless channels, we propose the use of finite-state Markov chains. Details of fading statistics of signal-to-interference-noise ratio, an important indicator of transmission quality, are presented. Further, we objectively inspect complexity versus accuracy tradeoff of solving our proposed optimization problems at a global as oppose to a local topology level. Our numerical simulations profile and compare the performance of a variety of scenarios for a number of sample network topologies.

• 대한간호학회지
• /
• 제42권7호
• /
• pp.1009-1018
• /
• 2012

Purpose: This study was done to evaluate effectiveness of home healthcare services (HHCS) specialized for elders who received spinal surgeries. Methods: A non-equivalent control group pre-post test quasi-experimental study was performed. HHCS was developed based on the Rice model of dynamic self-determination for self-care. For data collection, a control group (n=23) and an experimental group (n=23) were selected by matching age, BMI, pain, general characteristics and type of spine surgery. Measurement tools to evaluate uncertainty and knowledge were developed by the authors. The Numeric Rating Scale (NRS) and Japanese Orthopedic Association Back Pain Evaluation Questionnaire (JOABPEQ) were used to evaluate pain levels. Muscular strength in the legs was measured using a digital muscle tester and tape ruler. Questionnaires were used to evaluate disability in performing ADL and psychological distress levels. Results: The experimental group showed significant decrease in uncertainty (p=.028), increased knowledge (p=.038), and partially decreased pain (p=.003-.331). Partial muscle strength increased significantly (p=.021-.644). Disability in performing ADL and psychological distress in the experimental group decreased significantly compared to control group (p=.002, p=.004). Conclusion: Results indicate HHCS is an efficient home care nursing program for these elders. Further experimental studies with larger samples are required to confirm effects of HHCS.

• 한국지능시스템학회:학술대회논문집
• /
• 한국퍼지및지능시스템학회 1997년도 추계학술대회 학술발표 논문집
• /
• pp.350-355
• /
• 1997

The problem of mathematical model for an unknown system by measureing its input-output data pairs is generally referred to as state estimates. The state estimation problem is often of importance in its own right since we may want to know the value of the states. For instance, in navigation, we may take noisy positional fixes using satelite or radar navigation, and the estimator can use these measurements to provide accurate estimates of current position, hedaing, and velocity. And the state estimates can also be used for control purposes. Then it is very important to know the state of plant. In this paper, the theory of the minimization of a loss function was used to design the fuzzy system. Here, the used teory is Least Square Esimation method. This parametrization has the Linear in the parameters charcteristic that allows standard parameter estimation technique to be used to estimate the parameters of the fuzzy system. The combination of the fuzzy system and the estimation m thod then performs as a nonlinear estimator. If several fuzzy label are defined for the input variables at the antecedent part, the fuzzy system then behaves as a collection of nonlinear estimators where different regions of rules have different parameters. In simulation results, the fuzzy model controlled a difference in the structure between the actual plant and the fuzzy estimator. It is also proved that the fuzzy system is equivalent to its transformed system. therefore we was able to get the state space equation of system with the estimated paramater.

• 복식
• /
• 제63권1호
• /
• pp.1-15
• /
• 2013

This study deals with the aesthetic characteristics in Gareth Pugh's fashion film. As fashion films are becoming a newly emerging communication tool in fashion, the aim of this study will be to build a database on these films. For the specific method in this work, literature reviews were performed along with the empirical study of seven pieces of fashion film. The results of the study showed that Gareth Pugh released the fashion films from 2008 to 2012, and he collaborated with SHOW Studio member and photographer Nick Knight and Ruth Hogben. Common themes in their films were fear, fantasy, dynamics, and going off-limits, and these can be summed up in the following ways. First, a sense of fear was expressed via black colors, bizarre mechanical sounds, decalcomania shape in abstract images, and transformed physical body images. Second, an image of fantasy was presented with diverse expression techniques including colorful light presentations and abstract image setups from repeatedly changed image reproduction. Third, dynamic feature was denoted with a combination of fast development of images and quick reproduced layouts, as well as quick beat sounds, and big and powerful action movements. Fourth, characteristic of going off-limits was reflected, by showing the collections with a communication tool called fashion film instead of existing collection concept.

• 한국철도학회논문집
• /
• 제8권5호
• /
• pp.398-404
• /
• 2005

In this paper, we introduce the on-line test of the current collection characteristics for HSR 350x(Korea High Speed Train project) that have been performed in the Kyoung-bu high-speed line since 2002. Through the analysis of measured data during on-line test, the variation trend of contact force between pantograph and contact wire of catenary according to the span type, the track conditions and driving patterns is reviewed. In order to analyze the variation trend of contact force, we have checked the span type of catenary in KP 24 - 125 out of Kyoung-bu high speed line and obtained the statistical processing result per each span type. This study shows that the track conditions do not affect on the dynamic performance between pantograph and contact wire catenary, and the span type and the driving pattern are important factors in determining the good interaction between them.

• Archives of Plastic Surgery
• /
• 제35권6호
• /
• pp.729-734
• /
• 2008

Purpose: The evaluation and management of a completely transected tendon of the hand is relatively clear. In most cases, the integrity is assessed by physical examination(eg, broken normal cascade, motion loss) but occasionally, It happens in troubles. because of pain, limited patient cooperation(eg, child, unconscious patient), and other associated injuries(eg, fractures, foreign bodies). Methods: From september 2006 to August 2007, 28 patients were evaluated with real time ultrasonography preoperatively and postoperatively. Twenty eight patients with injured tendon were evaluated using an HDI 5000 Sono CT(Philips Medical Systems, Bothell, WA) machine with a high resolution, 7.5MHz hockey stick linear probe. Dynamic evaluation was performed in real time. Results: Surgery was performed after the ultrasonographic evaluation. Sonographic diagnosis and intraoperative findings were correlated. Ultrasonographic findings show tendon discontinuity, gaps, and fluid collection. Conclusion: We conclude that ultrasonography is helpful in evaluating and managing acute tendon injury. Especially, in cases of completely lacerated tendon, ultrasonography can identify the location of the proximal tendon stump and partial lacerated tendon, ultrasonographic diagnostic tool can decrease misdiagnosis.

• 한국정보과학회논문지:정보통신
• /
• 제32권1호
• /
• pp.60-67
• /
• 2005

클러스터 구조는 고가용도와 고성능 그리고 확장성을 요구하는 웹 서비스나 정보시스템 같은 응용 분야에서 저 비용으로 유용하게 사용 가능하다. 웹 서버 클러스터의 내용 기반 분배는 각각의 웹 서버들 사이에서 지능적으로 사용자 요구를 전달하기 위해 애플리케이션 계층에서 알려진 상세한 데이터를 이용한다. 본 논문에서는 웰 서버 클러스터 시스템을 대상으로 캐시의 적중과 각 서버의 부하 상태를 고려한 효율적인 내용 기반의 부하 분배를 수행하고 사용자의 동적인 문서 요구를 수용할 수 있도록 하는 알고리즘을 제안하였다. 특히 제안된 알고리즘은 부하 분배기로 하여금 각 서버에 있는 캐쉬의 내용을 모델링 하기 위한 시도나 웹 문서에 대한 사용자 접근 확률을 계산하기 위한 오버헤드가 없다.

• 한국태양에너지학회:학술대회논문집
• /
• 한국태양에너지학회 2011년도 춘계학술발표대회 논문집
• /
• pp.217-222
• /
• 2011

This study examined the cooling performance of a solar heating and cooling system for an office building using the dynamic simulation program (TRNSYS). This solar heating and cooling system incorporates evacuated tube solar collectors of $204m^2$, storage tank of $8m^3$, 116.2kW auxiliary heater, single-effect $LiBr/H_2O$ absorption chiller of 20RT nominal cooling capacity. It was found that for the representing day showed peak cooling load the annual average collection efficiency of the collector was 32.9% and coefficient of performance of single-effect $LiBr/H_2O$ absorption chiller was 0.68. And the results shows for the cooling season the solar fraction of the solar heating and cooling system was 32.2% and maximal and minimal solar fraction was 63.4% for May 17.9% for July respectively.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2008년도 춘계학술대회 논문집
• /
• pp.535-544
• /
• 2008

Unlike MS(Magnetic Stripe), SMART CARD is equipped with COS(Chip Operating System) consisting of the Microprocessor and Memory where information can be stored and processed, and there are two types of cards according to the contact mode; the contact type that passes through a gold plated area and the contactless one that goes through the radio-frequency using an antenna embedded in the plastic card. the contactless IC card used for the transportation card was first introduced into local area buses in Seoul, and expanded throughout the country so that it has removed the inconvenience such as possession of cash, fare payment and collection. Focusing on the Seoul metropolitan area in 2004, prepaid and pay later cards were adopted and have been used interchangeably between a bus and subway. The card terminal compatible between a bus and subway is Proximity Integrated Circuit Card(PICC) as international standards(1443 Type A,B), communicates in the 13.56MHz dynamic frequency modulation-demodulation system, and adopts the Multi Secure Application Module(SAM). In the second half of 2009, the system avaliable nationwide will be built when the payment SAM standard is implemented.