• Structural Engineering and Mechanics
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• 제47권1호
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• pp.45-58
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• 2013

In structural reliability analysis, the response surface method is a powerful method to evaluate the probability of failure. However, the location of experimental points used to form a response surface function must be selected in a judicious way. It is necessary for the highly nonlinear limit state functions to consider the design point and the nonlinear trend of the limit state, because both of them influence the probability of failure. In this paper, in order to approximate the actual limit state more accurately, experimental points are selected close to the design point and the actual limit state, and consider the nonlinear trend of the limit state. Linear, quadratic and cubic polynomials without mixed terms are utilized to approximate the actual limit state. The direct Monte Carlo simulation on the approximated limit state is carried out to determine the probability of failure. Four examples are given to demonstrate the efficiency and the accuracy of the proposed method for both numerical and implicit limit states.

• 방송공학회논문지
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• 제27권5호
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• pp.685-693
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• 2022

디지털 전환과 비대면 소통 플랫폼에 대한 요구로 메타버스가 주목받고 있지만, 원활한 의사소통을 돕는 대화 시스템이 아직 메타버스에서는 널리 적용되지 않았다. 본 연구에서는 메타버스에 대화 시스템을 적용하는 경우 메타버스에서의 주변 상황에 대한 정보를 이용하여 기존의 대화 상태를 수정하는 방법을 제안한다. 대화와 상황에 대한 정보를 모두 활용하는 본 모델은 대화 상태를 추적하는 모듈과 상황 상태를 추적하는 모듈, 그리고 추적한 상황 상태와 대화 상태를 비교하여 수정하는 알고리즘으로 구성된다. 사용자의 의도를 재확인하는 대화가 추가됨에 따라 잘못된 대화 상태를 수정할 수 있고, 대화 시스템의 정확도 향상이 가능하다.

• 농업과학연구
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• 제49권4호
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• pp.707-717
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• 2022

As the variability of recent rainfall is increasing, it is becoming important to recognize the possibility of changes in the current reservoir state in advance and to inspect the stability based on accurate evaluation standards. However, the evaluation standards for the state change factors of reservoirs are still not suitable for agricultural reservoirs and thus much improvement is needed. Therefore, in this study, the evaluation criteria for state change factors specialized for small reservoirs were categorized and standards were prepared by considering factors that may cause state changes on the dam crest, upstream slope, and downstream slope of the embankment. The categorized results were configured based on the number of mentions of the precision safety inspection report on major defects in 102 reservoirs and the defect factors found in field investigations. The findings of the study indicated that the current state change standards require many revisions for excessive or unnecessary state change factors in the reservoir. Specifically, the deletion of measurement gauges not applicable to the reservoir, the addition of defects found in the reservoir, and the scope of use of the term were proposed. The results of this study can contribute to efficient system operation and management by improving the deficiencies in the system and introducing a new state change factor.

• 종교문화비평
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• 제25호
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• pp.195-241
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• 2014

현대 국가의 목표가 개인의 기본 인권보장과 국가 공동체의 공공선 실현에 초점을 두고 있다고 한다면, 국가의 종교정책 방향도 그것에서 크게 벗어날 수 없을 것이다. 그러면서도 현대 국가의 종교정책은 대부분 정교분리 원칙을 기본으로 삼고 있다. 종교와 세속을 구분하고 양자의 관계를 정립함으로써 종교의 자유보장과 정교분리를 실현하고자 하는 것이다. 본 연구는 근대 국민국가의 중요한 제도적 장치인 정교분리 원칙을 집중적으로 조명하고, 이것을 통해 보다 적극적인 종교정책의 가능성을 살펴보고자 하였다. 종교와 국가 그리고 정치 관계를 구조적이고 기능적인 입장에서 검토해 본 후 정교분리 원칙이 어떻게 근대 정치원리로서 자리 잡게 되었는지 그리고 각국의 정교분리 정착과정과 그 실제가 어떤지 먼저 정리해 보았다. 그런 다음 그것을 토대로 하여 한국의 정교분리 실제와 구조적 한계 그리고 그에 따른 종교 정책의 방향을 점검해 본 것이다. 한국사회에서는 정교분리 원칙에 대한 적용 경험이 일천하고 또 그것에 대한 교조적(敎條的) 인식 때문에 종교문제라면, 무조건 회피하거나 아니면 회피하지는 않는다하더라도 소극적으로 대처하는 경향이 있다. 그러나 종교문화는 한국사회에서 최대 문화자원이자 사회적 자산이며, 국가발전의 동력으로서도 많은 잠재력을 가지고 있기 때문에 종교를 그냥 내버려두기에는 아쉬운 점이 많다. 따라서 국가의 종교정책들을 제한하고 있는 정교분리 원칙의 원천적 한계들을 살펴보고, 그 한계들을 극복함으로써 종교문화의 자원을 국가발전의 동력으로 활용할 수 있는 이론적인 기반을 탐색해 보고자 하였다. 국가마다 정교분리 원칙이 얼마나 다르게 적용되고 있는가에 주목하여 한국적인 상황을 검토하였다, 한국에서의 종교정책의 근간이 되는 정교분리는 일본과 유사한 '유사분리형'에 속하고 있어서 교조적으로 해석되든가 아니면 자의적으로 해석되는 경향이 많다. 이글은 이런 파행적인 형태를 극복하고, 한국사회에 맞는 정교분리를 사회문화적 관행으로 조속히 정착시킬 필요가 있으며, 나아가 정교분리의 폭넓은 해석을 통해 적극적인 종교정책이 시행될 필요가 있다는 것을 밝히고 있다.

• Asian-Australasian Journal of Animal Sciences
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• 제30권1호
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• pp.1-7
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• 2017

Objective: Three genome-wide association studies (GWAS) and a meta-analysis of GWAS were conducted to explore the genetic mechanisms underlying variation in pig teat number. Methods: We performed three GWAS and a meta-analysis for teat number on three pig populations, including a White Duroc${\times}$Erhualian $F_2$ resource population (n = 1,743), a Chinese Erhualian pig population (n = 320) and a Chinese Sutai pig population (n = 383). Results: We detected 24 single nucleotide polymorphisms (SNPs) that surpassed the genome-wide significant level on Sus Scrofa chromosomes (SSC) 1, 7, and 12 in the $F_2$ resource population, corresponding to four loci for pig teat number. We highlighted vertnin (VRTN) and lysine demethylase 6B (KDM6B) as two interesting candidate genes at the loci on SSC7 and SSC12. No significant associated SNPs were identified in the meta-analysis of GWAS. Conclusion: The results verified the complex genetic architecture of pig teat number. The causative variants for teat number may be different in the three populations

• 대한지리학회지
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• 제29권3호
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• pp.281-296
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• 1994

자본주의 사회의 공간구조를 파악하기 위해서는 경제적, 사회적, 그리고 정치적 구 조에 대한 이해가 불가피하다. 내적인 경제, 사회, 정치 현상은 공간구조에 외적으로 그대로 반영되고 있으며, 표면적으로 드러난 공간구조 현상을 설명하기 위해서는 그것에 영향을 주 는 여러 과정들을 구조적으로 파악해야 한다. 자본주의 국가에서 국가는 직.간접으로 공간 경제에 작용하고 지역 불균등 발전에 일조하고 있다. 본 연구에서는 다음과 같은 문제점들 을 제기하고자 한다. 첫째, 경제구조에서의 국가의 역할은 무엇이고 국가 자체가 안고 있는 문제점은 무엇인가\ulcorner 둘째, 공간구조에서의 국가의 역할은 무엇인가\ulcorner 그리고 셋째, 공간형성 에 있어서 가장 직접적으로 영향을 미치고 있는 도시정부를 비롯한 지방정부에서의 도시개 발이나 지역개발정책들은 어떻게 형성되고, 그러한 정책들이 공간에 미치는 영향은 무엇인 가\ulcorner 자본주의 국가의 본질을 파악하기 위하여 국가이론에 관한 여러 쟁점들을 검토하여 보 고, 미국을 사례로 조절론자들의 논의를 배경으로 국가정책과 관련한 도시정책 변화와 그에 따른 도시 및 지역의 불균등 발전을 역사적으로 살펴보고자 하는 것이 본 연구의 목적이다.

• 대한간호
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• 제29권3호
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• pp.36-48
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• 1990

This study was attempted to provide us with basic information on how to improve understanding with patients for operation, and to offer then better nursing and treatment. This kind of study will help scientific application to nursing practice and operating room. The data was collected by interviewing 29 patients who underwent the elective surgery under the general anesthesia at Y hospital in Seoul. The interview ran from October 15 to December 15, 1989. The research instrument was a anxiety measurement device (SAAI) originally developed by Spielberger, et al and modified by Jung-Tack Kim. 1. Hypothesis Testing Hypothesis one was that there would be a difference in state anxiety level according to a time difference in watiting for operation. This hypothesis was rejected(state.anxiety level one hour before operation P>.05, r-.747, State anxiety level half an hour before operation P>.05, r-.1550, state anxiety level just before operation, P>.05, r=.1099). However, state anxiety, evel appeared to be associated with a longer watiting period, like one day before operation (P<.05, r-.4628). Hypothesis two was that there would be a difference according to state anxiety level of patients for operation. This was rejected. (Change of blood perssure in systolie P>.05 r=.1082, Change of blood pressure in diastolic P>.05, r=.088, Change of pulse rate, P>.05, r-1.909) 2. Examining trait anxiety and state anxiety levels, the average level of trait anxiety was 42.034, and the average level of state anxiety one day before operation was 43,000. The average level of state anxiety was averaged 42.356 in a waiting room for operation. 3. Examining the state anxiety level by time period, the one hour before was 42.379 the level half an hour before 42.276, and the level just before operation 42.414. The low level of state anxiety was due to the fact that premedication was not eliminated. 4. Age and time period like one day before operation was related to state anxiety level (F=5.271, P<.0.01) and blood pressure in waiting room for operation. That is, state anxiety level and blood pressure of patients one day before operation appeared high. Sex was relation to changes of blood pressure ; the blood pressure of male patients appeard higer than of female patients. A marital status was also related anxiety level one hour before operation the married patient for operation showed a higher state anxiety level than that of the unmarried patient for operation. Education was similarily related to trait anxiety level in which highly educated patients show lower levels of trait anxiety than poorly educated ones. Motive for hospitalization was related to state anxiety level for patient one hour before operation (F=6.464, P<.05) likewise, patients who are supposed to undergo operation hastily showed higher levels of anxiety than patients who expect elective surgeries.

• Nuclear Engineering and Technology
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• 제53권6호
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• pp.1942-1946
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• 2021

Gadolinium oxysulfide (GOS) is regarded as a novel scintillator for the realization of ultra-high spatial resolution in neutron imaging. Monte Carlo simulations of GOS scintillator show that the capability of its spatial resolution is towards the micron level. Through the time-of-flight method, the light output of a GOS scintillator was measured to be 217 photons per captured neutron, ~100 times lower than that of a ZnS/LiF:Ag scintillator. A detector prototype has been developed to evaluate the imaging solution with the GOS scintillator by neutron beam tests. The measured spatial resolution is ~36 ㎛ (28 line pairs/mm) at the modulation transfer function (MTF) of 10%, mainly limited by the low experimental collimation ratio of the beamline. The weak light output of the GOS scintillator requires an enormous increase in the neutron flux to reduce the exposure time for practical applications.

• Asian Pacific Journal of Cancer Prevention
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• 제15권9호
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• pp.4109-4115
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• 2014

Background: Accurate assessment of disease progression requires proper understanding of natural disease process which is often hidden and unobservable. For this purpose, disease status should be clearly detected. But in most diseases it is not possible to detect such status. This study, therefore, aims to present a model which both investigates the unobservable disease process and considers the error probability in diagnosis of disease states. Materials and Methods: Data from 330 patients with gastric cancer undergoing surgery at the Iran Cancer Institute from 1995 to 1999 were analyzed. Moreover, to estimate and assess the effect of demographic, diagnostic and clinical factors as well as medical and post-surgical variables on transition rates and the probability of misdiagnosis of relapse, a hidden Markov multi-state model was employed. Results: Classification errors of patients in alive state without a relapse ($e_{21}$) and with a relapse ($e_{12}$) were 0.22 (95% CI: 0.04-0.63) and 0.02 (95% CI: 0.00-0.09), respectively. Only variables of age and number of renewed treatments affected misdiagnosis of relapse. In addition, patient age and distant metastasis were among factors affecting the occurrence of relapse (state1${\rightarrow}$state2) while the number of renewed treatments and the type and extent of surgery had a significant effect on death hazard without relapse (state2${\rightarrow}$state3)and death hazard with relapse (state2${\rightarrow}$state3). Conclusions: A hidden Markov multi-state model provides the possibility of estimating classification error between different states of disease. Moreover, based on this model, factors affecting the probability of this error can be identified and researchers can be helped with understanding the mechanisms of classification error.

• Asian Pacific Journal of Cancer Prevention
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• 제17권2호
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• pp.575-579
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• 2016

The aim of this research is to determine the characteristics of endothelial factors and the hemostatic system conditions with malignant neoplasms patients, which were exposed to ionizing radiation. Total number of examined people is 223, 153 of them are patients with gastrointestinal tract oncopathology. The article presents the results of the analysis of numerical indicators of endothelial condition and platelet hemostasis of patients, who had cancer. They lived in the regions of Kazakhstan, subjected to contamination of radionuclides as a result of nuclear weapons tests, which took place in this region from 1949 to 1989. These results then were compared to cancer patients and healthy individuals with no radiation risk. The study revealed the presence of higher levels of endothelial dysfunction and following trigger of the hemostatic system in patients with malignant tumors of the gastrointestinal tract. In particular, the defined high degree of endothelial dysfunction include endothelium-dependent vasodilation, content desquamated endothelial cells in peripheral blood and von Willebrand factor. These indicators have a clear correlation with the degree of disorder of studied parameters of the hemostasis, which can cause the development of thrombotic complications.