• Child Health Nursing Research
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• 제4권1호
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• pp.116-127
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• 1998

The purpose of this study was to examine the reliability of Q-sorting and to develope a typology of coping to stress in school-age children through the use of Q-methodology. For the study, Q-statements are selected from the literature and interviews of 30 Children, A total number 153 statement were collected and 31 Q-samples were finally selected. AP-sample of 76 was selected the elementary school children. Each of respondents were given 31 coping strategies questionnaire and set of 31 statements with cartoon on each of cards and sorted them according to the 9-point scale. The result of the C-sorting by each subject were coded and analyzed using the QUANAL PC and SPSS PC＋ program. As a result of the analysis, There were significant relationship between score each item of question naire and score of sorted statement. Therefore, school-age children was able to Q-sorting(forced normal distribution). Also, the four types of coping were named as follows : Type I (n=35) : To search for the dynamic behaviors Type II (n=12) : To search for the intellectual behaviors Type III (n=22) : To search for emotional-spiritual behaviors Type IV (n=7) : To search for the self-abuse behaviors Throught the study, the implication for teachers, parents and school nurses is that there is needed to guide and to support adaptive coping behaviors. Also, it is recommended that the application of Q-methodology for study of children's subjective concepts like stress and coping.

• 대한기계학회논문집
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• 제15권6호
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• pp.1919-1932
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• 1991

본 연구에서는 고강도 알루미늄 합금으로 제작된 평판보의 받음각(.alpha.)를 10˚ 에서 30˚까지 10˚씩 변화시킨 3가지의 모델에 대해, 각 모델의 Re$_{d}$수 변화에 대한 후류의 스펙트럼분석, 레이저 도플러 유속계(laser doppler velocimetry)를 이용 한 유동장 해석 및 평판보의 응답을 실험을 통해 조사, 분석하고 유동장과 측정이 용 이하지 않은 얇은 평판주위의 압력분포에 대한 전산해석을 수행함으로써 유동 여기진 동 구조의 규명을 시도하였다.다.

• 화약ㆍ발파
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• 제36권3호
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• pp.1-9
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• 2018

본 연구는 인공절리의 경사, 인공절리와 발파공 간의 거리, 그리고 인공절리의 수가 압력파동의 전파, 균열의 전파, 그리고 발파파동의 속도에 미치는 영향을 평가할 목적으로 수행되었다. 이 평가작업은 동적 FEM 프로그램인 AUTODYN 상에서 지원되는 Euler-Lagrange solver를 사용하여 수행되었다. 주요 결과로서 발파파속은 인공절리와 발파공 간의 거리가 가깝거나 인공절리의 경사가 증가할수록 더 빠르게 감소하는 것으로 나타났다. 인공절리가 없는 경우에 비해 절리가 하나라도 존재하는 경우에는 발파파속의 감쇠가 상당히 크게 발생하였다. 하지만 인공절리의 수가 발파파속의 감쇠에 미치는 영향은 주어진 조건 하에서는 미미한 수준이었다.

• 경영과학
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• 제17권1호
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• pp.117-134
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• 2000

Pubilc utility industries including the electric utility industry are facing a new stream of privatization com-petition with the private sector and deregulation. The necewssity to solve now and in the future power supply and demand problems has been increasing through the sophisticated generation expansion plan(GEP) approach con-sidering not only KEPCo's supply-side resources but also outside resources such as non-utility generation(NUG) demand-side management (DSM). Under the environmental situation in the current electric utility industry a new approach is needed to acquire multiple resources competitively. This study presents the development of a modified electric generation expansion analysis system(EGEAS) model with avoided cost based on the existing EGEAS model which is a dynamic program to develope an optimal generation expansion plan for the electric utility. We are trying to find optimal GEP in Korea's case using our modified model and observe the difference for the level of reliabilities such as the reserve margin(RM) loss of load probability(LOLP) and expected unserved energy percent(EUEP) between the existing EGEAS model and our model. In addition we are trying to calculate avoided cost for NUG resources which is a criterion to evaluate herem and test possibility of connection calculation of avoided cost with GEP implementation using our modified model. The results of our case study are as follows. First we were able to find that the generation expansion plan and reliability measures were largely influenced by capacity size and loading status of NUG resources, Second we were able to find that avoided cost which are criteria to evaluate NUG resources could be calculated by using our modified EGEAS model with avoided cost. We also note that avoided costs were calculated by our model in connection with generation expansion plans.

• 지질공학
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• 제30권3호
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• pp.215-222
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• 2020

본 연구에서는 미국, 일본, 유럽 등 해외의 지하수 관리 사례를 조사하여 향후 우리나라 지하수 관리 개선방향을 제시하였다. 미국에서는 지하수자원 프로그램(GWRP)이 국지적-권역별로 운영된다. 일본에서는 적정지하수 이용을 관리하기 위해 소규모, 중규모 및 대규모 유역에 따라 서로 다른 지하수자원 관리프로그램이 수행되었다. 유럽에서는 지하수가 지표수와 동일하게 평가되며, 유역 단위로 지표수와 지하수를 통합 관리하고 있다. 우리나라에서는 국가차원에서 지하수 개발가능량을 하향식으로 지정하고 관리하지만 미국과 일본에서는 소규모 지역 단위에서 대규모 유역까지 범위를 확장하며 관리하는 차이가 있다. 또한 지하수 자원의 지속 가능성을 평가하려면 지속적인 지하수 관측과 조사, 데이터 분석, 지하수 개발 우선순위 결정 등을 포함하는 역동적 지하수 활용 프로그램을 운영해야 한다.

• 대한물리치료과학회지
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• 제25권1호
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• pp.31-43
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• 2018

Purpose: The purpose of this study is to investigate and to verification of changes that the effect of treadmill and body weight support treadmill training on balance and gait ability for sub-acute stroke patients during 4 week. Method: 16 subjects who was diagnosed stroke were divided into 2 groups(8-treadmill training group, 8-body weight support treadmill group) by randomized control trial. Both training programs were consisted with 40 minuted, 5 times a week for 4 weeks and after training programs. Analysis: We analysed effects and changes on balance and gait ability. Analyses were performed using PASW ver. 18.0 and results were reported as mean ${\pm}$ standard deviation (S.D.). To investigate within group comparisons and to verification on effects of exercise, we did paired t test and repeated measured ANOVA test. Significance was set at p<.05. Result: Both training programs showed positive changes in Limit of Stability but significant results which is area of hemiside, area of intact side, area of posterior, total area were reported in body weight support treadmill training group. Changes of Berg Balance Scale was significantly increase and it had significant correlation between groups. Changes of 6 Minutes Walking Test was significant increase in both groups but there was no significant changes on Foot print and Romberg test. Conclusion: After considering all factors, both training programs showed effect on improvement of balance and gait ability in sub-acute stroke patients, but body weight support treadmill training group had better improvement in dynamic balance than treadmill training group. For the increase of balance and gait ability in sub-acute stroke patients, we need to continues study on difference of treadmill and body weight support treadmill and then we will give stroke patients a better satisfaction if we develop and provide a rehabilitation program for improvement of balance and gait ability.

• 대한의용생체공학회:의공학회지
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• 제31권3호
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• pp.227-233
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• 2010

This study analyzed performance according to kick point and stiffness of Soft-$golf^{TM}$ shaft. This research team developed soft-$golf^{TM}$ as a new fusion sports with similar motions with golf and it can be learned safely for all age groups in 2002. The head of Soft-$golf^{TM}$ club is made of zinc alloy and has a mesh or a grid structure, and shaft uses carbon graphite to reduce the total weight of the club. To improve carry distance and to assure consistency of a ball during Soft-$golf^{TM}$ swing, this study manufactured shaft with various kick points (low, middle and high) and stiffness (stiff, regular, lady, morelady) and analyzed a swing motion with characteristics of each shaft presented in a dynamic condition such as a ball's speed, a head's torsion angle and a ball's deviation with ProAnalyst program through a high-speed camera taking pictures using a swing machine robot system(Robo-7). From all of the results, this study determined an appropriate shaft of Soft-$golf^{TM}$.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2009년도 춘계 종합학술대회 논문집
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• pp.921-926
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• 2009

인류가 등장한 이래 커뮤니케이션 수단으로서 많은 영상 디지털 미디어들이 성장하고 확장되어져 왔다. 영상디지털 미디어들은 수신자와 송신자 사이의 커뮤니케이션을 긴밀하게 한다. 미디어의 변화와 테크놀로지의 발전 속에 등장한 영상디지털 미디어는 시각과 청각의 결합을 통해 시각적 정보전달과 시간적 단축을 가져왔다. 이러한 영상 디지털 미디어의 발전 형태로 등장한 것이 모션그래픽이라는 분야이다. 모션그래픽의 발전은 기존의 미디어가 표현해 내지 못하는 다양한 형태의 영상기법과 표현효과를 가능하게 하고 있다. 특히 영화의 타이들, 텔레비전의 프로그램 타이틀, 그리고 광고를 비롯한 뮤직비디오 등 다양한 분야에 활용되고 있다. 이러한 영상표현기법들은 수용자들의 감성을 자극하여 감성커뮤니케이션적인 작용 또한 수행하고 있다. 본 연구에서는 모션그래픽이 수용자들에게 얼마만큼 효과적인 의미전달 매체로서 중요한 역할을 하는지에 대해 그 특성을 알아보고, 모션그래픽이 감성커뮤니케이션 수단으로서 수용자들에게 미치는 영향과 적용을 사례연구를 통하여 연구해 보고자 한다.

• 한국항공우주학회지
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• 제42권3호
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• pp.237-242
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• 2014

항공기용 터보팬 엔진의 성능이 이륙과 같이 급격하게 변하는 상황일 때 압축기에서 서지현상이 발생할 수 있는데, 본 논문에서는 이를 방지하는 것을 목적으로 한다. 제안된 시스템은 연료유량을 개루프 명령으로 생성하고, 가변 안내익을 폐루프로 설계하여 터보팬 엔진에 대한 제어시스템을 고전적인 PID제어기와 퍼지 추론 기법을 적용하여 설계하였다. 시뮬레이션은 SIMULINK를 이용하였는데, 제어로직 구성을 위한 동역학적 모델링은 NPSS(엔진해석프로그램)와 SIMULINK를 연동시켜주는 SIMUNLINK BLOCK인 NPSS S-function을 설계하여 이용하였다. 그리고 시뮬레이션 결과로 PID와 Fuzzy 모든 방법에 있어 VIGV의 제어결과로 서지현상을 방지할 수 있음을 증명하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.2170-2174
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• 2005

Selective Laser Sintering (SLS) is a useful rapid prototyping technique for the manufacture of three dimensional (3D) solid objects directly from a scanning data. A new approach called a Selective Multi-Laser Sintering (SMLS) system has been developed at Korea Institute Machinery & Materials (KIMM) as an industrial type SFFS. This SMLS machine is built with a frame, heaters, nitrogen supply part, laser system. This system uses the dual laser and 3D scanner made in $Solutionix^{TM}$ to improve the precision and speed for large objects. The three-dimensional solid objects are made of polyamide powder. The investigation on each part of SMLS system is performed to determine the proper theirs design and the effect of experimental parameters on making the 3D objects. The temperature of the system has a great influence on sintering the polymer. Because the stability of the powder temperature prevents the deformation of each layer, the controls of the temperature in both the system and the powders are very important during the process. Therefore, we simulated the temperature distribution of build room using the temperature analysis with ANSYS program. Selected radiant heater is used to raise temperature of powder to melting point temperature. The laser parameters such as scan spacing, scan speed, laser power and laser delay time affect the production the 3D objects too. The combination of the slow scan speed and the high laser power shows the good results without the layer curling. The work is under way to evaluate the effect of experimental parameters on process and to produce the various objects. We are going to experiment continuously to improve the size accuracy and surface roughness.