• Korea journal of population studies
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• v.30 no.1
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• pp.25-47
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• 2007

본 연구는 미국 노인의 두 조사 시점에 걸친 결혼 상태(지속적 유배우, 배우자 상실, 지속적 무배우) 및 은퇴 상태(지속적 은퇴, 은퇴 전이 지속적 취업)가 다양한 측면의 정신건강(우울감, 행복감, 자긍심, 통제감)에 미치는 영향 및 이에 대한 성별의 중재효과를 살펴보았다. 이를 위하여 미국 전국규모 종단자료인 National Survey Of Families and Households (T1-T2: 1987-1993)의 50세 이상 응답자 1,798명의 자료가 분석에 포함되었다. 그 결과 T1-T2 간 배우자 상실은 우울감 증가 및 행복감 감소와 연관되는 것으로 나타났다. T1-T2 지속적 무배우 상태는 통제감의 증가와 관련되며, T1-T2지속적 무배우 상태인 남성의 경우는 지속적 무배우 상태의 굴성과 틀리 현저하게 행복감이 저하되는 것으로 나타났다. T1-T2 지속적 은퇴 상태는 우울감 증가, 자긍심 저하, 통제감 저하와 관련되었다. T1-T2 간 은퇴전이는 자긍심 저하와 연관되었다. 은퇴와 정신건강 저하간의 관련성을 일관적으로 제시하는 이상의 결과들은, 은퇴가 노년기 정신건강에 미치는 부정적 영향을 경감시킬 수 있는 보호적 중재요인의 규명에 대한 후속 연구의 필요성을 강력히 시사한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.3
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• pp.475-481
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• 2009

The frequency and probability of deadlock are influential factors in the design of algorithms for deadlock. However, little work has been done in this area because it's not easy to analyze how factors such as the characteristics of process or resource, resource request and release patterns, or the number of process affect the occurrence of deadlock. This study was designed to reduce remarkably the number of state by adapting the model 'state (a,b)t' to represent the resource allocation state, as well as to include the effect of resource error rate and recovery rate in the system analysis. Various formulas about deadlock occurrence were resulted in this study such as the average time interval of deadlock, the probability that a process requesting a resource waits or deadlocks, and the probability that a request deadlocks in a cycle of length 2.

• KIPS Transactions on Software and Data Engineering
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• v.2 no.1
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• pp.19-26
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• 2013

To improve the reliability and quality of software system, many studies of the testing based on state-transition diagram have been in progress. Existing studies tried to solve the complexity problem of state-transition diagram. But the development of test case demands the better way to derive and manage the state diagram with low complexity. In this paper, the STMT(State-Transition Mapping Tree) is proposed to decrease the complexity of state diagram without changing or loosing the original state or transition information. Comparing with other methods, the proposed method turns out to be less complex.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.1
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• pp.126-134
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• 2016

The aim of this cross sectional study was to examine the prevalence of sarcopenia in association with ADL, nutritional status and depression among community dwelling elderly women. The study subjects were 90 elderly women, 65 years and over, who were living in the communities of B and D metropolitan cities from May to July, 2014. The measurements were anthropometric measures, The mini-nutritional assessment instrument (MNA), ADL, IADL, MMSE, and SGDS-K were used. The mean age of the subjects was 74.7(8.22), the prevalence of sarcopenia of this population was 37.8%, almost none of them (94.4%) required assistance in ADL, 15.6% had a risk of undernutrition, and 12.2% had the symptom of depression. The sarcopenic subjects were characterized as low income, low education, living alone, and had more co-morbidity than those of the non-sarcopenic subjects. The sarcopenic subjects were undernourished, and had higher depression scores (SGDS-K), but not in the ADL, than those of the non-sarcopenic subjects. The calf and thigh circumferences, and cognitive ability were the best predictors of sarcopenia, In conclusion, low calf and thigh circumferences and low cognitive ability will increase the risk of sarcopenia in those 65 and over in community dwelling facilities and those three predictors will be useful in the early detection of sarcopenia in the future.

• Proceedings of the KIEE Conference
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• 2003.04a
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• pp.72-74
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• 2003

유도전동기의 가변속 구동시스템에서 자속 축 기준제어를 이용하는 경향이 증가하고 있으며 설치환경, 가격 등의 제약으로 인하여 위치 및 속도센서가 없는 센서리스 속도제어가 많이 연구되고 있다. 본 논문은 유도전동기의 센서리스 제어에 관한 연구로서 과도상태에서 슬라이딩모드 관측기를 사용함으로써 속응성이 빠르고 파라미터의 변동에 강인하며, 정상상태에서는 적응상태관측기를 사용함으로써 채터링을 감소하는 센서리스 제어를 제시한다. 시뮬레이션 및 실험결과에서 과도상태와 정상상태에서 양호한 성능을 나타내었다.

• Proceedings of the KSRS Conference
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• 2009.03a
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• pp.101-104
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• 2009

기후 시스템에서 지구온난화는 세계적으로 매우 중요한 문제이고 이는 기후변화, 이상기온, 폭우, 가뭄 등의 문제를 초래한다. 특히 사막화는 전 세계적으로 10억 명 이상의 사람들에게 영향을 미치고 있다. 건조한 상태의 식생은 사막화되기 쉽기 때문에 식생의 수분상태는 사막화의 중요한 지표이다. 본 논문에서는 중국과 몽골 사막 주변영역에 대해 식생의 수분상태를 탐지하였다. 식생의 수분상태를 탐지하기 위해 1999년부터 2006년까지의 SPOT/VEGETATION 위성 이미지를 이용하여 정규화 수분지수(NDWI: Normalized Difference Water Index)를 산출하였다. 그 결과 1999년부터 2006년까지의 NDWI는 사막주변영역에서 감소하는 경향을 보였고, 그 영역은 몽골 고비사막 북동지역과 중국 타클라마칸 사막의 남동지역에 위치해 있었다.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.1 no.2
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• pp.57-61
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• 1987

The characteristis of all the instruments and materials used in atomic industry are changed due to irradiation damages by the effects of radiation activities. In this study when R-C series-parallel circuits are irradiated by $\gamma$-ray, variations in its electrical properties have been investigated. The following results are obtained. 1) In the R-C series circuit, the impedance variation ratio is increased as the irradiation quantity is increased up to $10^6[r]$, and above $10^6[r]$, the impedance variation ratio reached at the saturated condition. In the saturated condition, the increasing value was about 1.25 (%). 2) In the R-C series circuit, the power factor variation ratio is decreased as the irradiation quantity is in creased up to $10^6[r]$, and above $10^6[r]$, the power factor variation ratio reached at the saturated condition. In the saturated condition, the decreasing value was about 0.5(%). 3) In the R-C parallel circuit, the impedance variation ratio is increased as the irradiation quentity is increased up to $10^6[r]$, and above $10^6[r]$, the impedance variation reached at the saturated condition. In the saturated condition, the increasing value was about 0.5.(%). 4) In the R-C parallel circuit, the power factor variation ratio is decreased as the irradiation quantity is increased up to $10^6$[r], and above $10^6$[r], the power factor variation ratio reached at the saturated condition. In the saturated condition, the decreasing value was about 1.3(%).

• Korean Journal of Psychosomatic Medicine
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• v.15 no.2
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• pp.107-112
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• 2007

Introduction : A positive thinking has been known to affect the enhancement of performance. One of temperament characters, harm avoidance is thought to be associated with anxiety related behaviors. Golfer showed highest anxiety and lowest score of harm avoidance, compared to any other sports. We hypothesized that positive feedback and reinforcement in golfer would decrease the anxiety and improve the performance. Methods : Fifty one golfers with the age from 15 to 19 were classified into two groups; 25 golfers who used Zinsser's Changing Negative thoughts to Positive thoughts and Beswick's positive self talk when exercise and competition (P-FB) and 26 golfers who had not (controls). Harm avoidance, Spielberg's Trait and State Anxiety, and Golf scores has been assessed at baseline and 6 months later. Results : There was no significant difference in baseline harm avoidance, anxiety, and golf scores between P-FB and controls. The total golf scores in both groups have improved after 6 month later. However, P-FB group showed greater improvement of total scores and putting scores, compared to controls. The state anxiety in PFB group has been decreased, while there was no change in controls. The change in the state anxiety was correlated with harm avoidance and the change in total golf scores. Discussions : The positive thinking has enhanced performance and state anxiety. The improvement of performance and anxiety in golfers was associated with high harm avoidance. The current study showed that the regulation of anxiety with positive thinking was helpful to the performance enhancement in subject with high harm avoidance.

• Journal of Internet Computing and Services
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• v.4 no.6
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• pp.13-24
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• 2003

Grid technology requires use of geographically distributed resources from multiple domains. Resource monitoring services or tools consisting sensors or agents will run on many systems to find static resource information (such as architecture vendor, OS name and version, MIPS rate, memory size, CPU capacity, disk size, and NIC information) and dynamic resource information (CPU usage, network usage(bandwidth, latency), memory usage, etc.). Thus monitoring itself may cause system overhead. This paper proposes the optimal monitoring interval to reduce the cost of monitoring services and the dynamic monitoring interval to measure monitoring events accurately. By employing two features, we find out unnecessary system overhead is significantly reduced and accuracy of events is still acquired.

• Journal of KIISE:Software and Applications
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• v.41 no.7
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• pp.518-522
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• 2014

A single state parsing automaton has the characteristics of the decision of actions which do not depend on the history of the parsing paths but on the current state. The single state parsing automaton hence has the advantage of the reduced parsing time and a small memory requirement compared to those of the conventional LR automaton. However, currently, the grammar classes generating single state parsing automata have not been known. This paper deals with the grammar classes generating single state parsing automata; in addition, this paper gives the generating method of single state parsing automata of the grammar classes.