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Functional Dyspepsia (기능성 소화불량증)

  • Lee, Sang-In
    • Journal of Korea Association of Health Promotion
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    • v.3 no.1
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    • pp.46-54
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    • 2005
  • The functional dyspepsia is a complex disease reaction that ocurs due to the presence of various factors and its pathophysiology has not been clearly verified until now. This disease is diagnosed after the organic diseases are ruled out. Therefore, the main treatments are limited down to compensating for revealed symptoms through exercising the supportive care. The international prevalence of the functional dyspepsia under the Rome I criterior is approximately 25%. For the cases of Koreans, there are very omnifarious symptoms in gastrointestinal disorders and the medical vocabularies which describe the diagnostic standard are not closely associated with the daily vocabularies, thus there would be a lot of restrictions to directly apply the Rome II criterior. However, the Korean Society of Gastrointestinal motility had decided to promote the use of the international standardized Rome II criterior in order for Korea to be comparable to the clinical studies from the other nations. There should be more extensive studies to differentiate the definitions of symptom descriptions from Korea to foreign countries. The extended researches concerning the pathophysiology are highly recommended which in return, would help enabling the reliable treatment techniques for this disease.

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Designing Cost Effective Open Source System for Bigdata Analysis (빅데이터 분석을 위한 비용효과적 오픈 소스 시스템 설계)

  • Lee, Jong-Hwa;Lee, Hyun-Kyu
    • Knowledge Management Research
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    • v.19 no.1
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    • pp.119-132
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    • 2018
  • Many advanced products and services are emerging in the market thanks to data-based technologies such as Internet (IoT), Big Data, and AI. The construction of a system for data processing under the IoT network environment is not simple in configuration, and has a lot of restrictions due to a high cost for constructing a high performance server environment. Therefore, in this paper, we will design a development environment for large data analysis computing platform using open source with low cost and practicality. Therefore, this study intends to implement a big data processing system using Raspberry Pi, an ultra-small PC environment, and open source API. This big data processing system includes building a portable server system, building a web server for web mining, developing Python IDE classes for crawling, and developing R Libraries for NLP and visualization. Through this research, we will develop a web environment that can control real-time data collection and analysis of web media in a mobile environment and present it as a curriculum for non-IT specialists.

A Study on the Procedure of Fault on Electric Power Systems by Special Fibers (특수섬유에 의한 전력계통의 고장유발 과정 고찰)

  • Rim, One-Kwon;Kim, Seong-Shik;Jung, Dong-Hak
    • Journal of the Korea Institute of Military Science and Technology
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    • v.12 no.5
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    • pp.667-675
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    • 2009
  • Faults can be generated at electric power systems by variety of both certain and uncertain reasons, which may cause harmful effects on electrical apparatuses under operation and stability of electric power system operations, and may also lead to great confusions and inconveniences to individual livings, public works, industrial activities, services, military affairs, etc.. In some cases, intentional inductions of faults are committed for specific purposes, and it is necessary to understand the procedures of fault by some foreign materials. In this paper, compositions and operations of electric power systems, summaries of electrical fault phenomena and fault protection, and restrictions to power system operation were outlined. And the analogies on the procedure of faults from former papers were introduced, and test results that revealed the validity of those analogies were also introduced.

Evaluation of the Characteristics of Semi-Anechoic Chamber for the Vertical Polarization (전파발무향심의 수직편파에 대한 특성평가)

  • 김동일;정세모;김민석
    • Journal of the Korean Institute of Navigation
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    • v.20 no.3
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    • pp.107-115
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    • 1996
  • With the rapid advance of electronic equipments and the frequent, use of them, the electromagnetic environments including EMC or EMI problems are very complicated. The radiation of electromagnetic waves from electronic equipments has strictly been controlled by the authorities concerned from many years ago. Though it is the most proper to test EMI or EMC in the open area test site, we have used the anechoic chamber in place of the test site because of its various restrictions. To achieve the purpose, in this paper, the performances of a few anechoic chambers according to absorbing materials are analyzed for horizontal and vertical polarizations respectively. Furthermore, the calculated and the measured site attenuations in semi-anechoic chamber made with ferrite grid are compared. The obtained results are to be valuable for designing an anechoic chamber.

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A Basic Analysis of Performance of Turbo CI Engine based on Stirling Cycle (스털링 사이클을 기본으로 하는 과급 CI 엔진의 기초 성능 분석)

  • 배종욱
    • Journal of Advanced Marine Engineering and Technology
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    • v.24 no.5
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    • pp.76-85
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    • 2000
  • Stirling cycle was actualized as so called ‘hot air engine’. It has been focused again lately as one of measures for exhaust gas emission problem, but as small power engine because of its method of heat addition. Recently marine power plants commenced to meet a stringent environmental restrictions by international convention, Marpol so that diesel engines as main and auxiliarly power plants are urged to be reformed to reduce NOx emission. Author devised a compression ignition engine as a large marine power plants combined with turbo charger based on stirling cycle, and analyzed the performance by means of basic thermodynamic calculation. Analyzed in this paper, were theoretical efficiency, mean effective pressure, required equivalence ratio, gas turbine power ratio, maximum pressure, states of turbo-charger inlet gas and exhaust gas, manifesting that the engine could be proposed as one of the future power plants of marine use.

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Efficient Response Surface Modeling using Sensitivity (민감도를 이용한 효율적인 반응표면모델생성)

  • Wang, Se-Myung;Kim, Chwa-Il
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.1882-1887
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    • 2003
  • The response surface method (RSM) became one of famous meta modeling techniques, however its approximation errors give designers several restrictions. Classical RSM uses the least squares method (LSM) to find the best fitting approximation models from the all given data. This paper discusses how to construct RSM efficiently and accurately using moving least squares method (MLSM) with sensitivity information. In this method, several parameters should be determined during the construction of RSM. Parametric study and optimization for these parameters are performed. Several difficulties during approximation processes are described and numerical examples are demonstrated to verify the efficiency of this method.

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ON FINITE SUMMATION FORMULAE FOR THE H-FUNCTION OF TWO VARIABLES

  • Gupta, K.C.;Garg, O.P.
    • Kyungpook Mathematical Journal
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    • v.18 no.2
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    • pp.211-215
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    • 1978
  • In the present paper, we obtain two new and interesting finite summation formulae for the H-function of two variables in a very neat and elegant form. The novel feature of the paper is that the method used here in deriving these formulae is simple and direct and does not impose heavy restrictions on the parameters involved. On account of the most general nature of the H-function of two variables, a number of related finite summation formulae for a number of other useful functions can also be obtained as special cases of our results. As an illustration, we have obtained here from our main results, the corresponding finite summation formulae for $Kamp{\acute{e}}$ de $F{\acute{e}}riet$ function. Appell's function and Gauss' hypergeometric function which are also believed to be new.

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A Heuristic Algorithm for the Vehicle Scheduling Problem (제품배달 배차를 위한 발견적 기법)

  • Song Seong-Heon;Park Sun-Dal
    • Journal of the military operations research society of Korea
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    • v.10 no.1
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    • pp.41-55
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    • 1984
  • Clarke-Wright algorithm is a well-known heuristic algorithm for the vehicle routing problem, that is, the problem to find routes through which vehicles deliver goods to retailers. The purpose of this paper is to extend the Clarke-Wright algorithm to the vehicle routing problem with the following restrictions: ${\cdot}$ capacities of vehicles may not be the same ${\cdot}$ vehicles should pick up empty boxes on the way back ${\cdot}$ there is a deadline before delivery should be completed for every retailer ${\cdot}$ only certain kinds of vehicles may enter the unloading sites of retailers. This paper modifies the Clarke-Wright algorithm for this problem and shows how to solve a real problem by the newly developed algorithm.

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A Simulation Based Vehicle Distribution Planning System

  • 양병희;이영해
    • Journal of the military operations research society of Korea
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    • v.22 no.2
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    • pp.182-199
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    • 1996
  • Many vehicle routing methods have been suggested, which minimize the routing distances of vehicles to reduce the total transportation cost. But the more considerations the method takes, the higher complexites are involved in a large number of practical situations. The purpose of this paper is to develop a vehicle distribution planning system using heuristic algorithms and simulation techniques for home electronics companies. The vehicle distribution planning system developed by this study involve so complicated and stochastic conditions such as one depot, multiple nodes(demand points), multiple vehicle types, multiple order items, and other many restrictions for operating vehicles. The proposed system is compared with the nearest neighbor method and the savings method in terms of total logistics cost and driving time. This heuristic algorithm and simulation based distribution planning system is efficient in computational complexity, and give improved solutions with respect to the cost as well as the time. This method constructs a route with a minimum number of vehicles for a given demand.

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Orthoscopic Integral Imaging Display by Use of Computational Method Based on Lenslet Model (렌즈릿 모델에 기초한 컴퓨터 변환을 통한 Orthoscopic 집적 영상 디스플레이)

  • Shin, Donghak;Hong, Seok-Min;Lee, Byung-Gook;Piao, Yongri;Zhang, Miao
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.10a
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    • pp.1015-1018
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    • 2012
  • A computational method of integral imaging is proposed based on the lenslet model which allows that the orthoscopic 3D image can be reconstructed at any arbitrary position without any restrictions. The proposed method is not rigidly adhere to the fixed reconstructed distance, but also requires no additional procedure during the depth conversion process. To show the usefulness of the proposed method, we carry out the preliminary experiments and present the experimental results.

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