• 한국응용곤충학회지
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• 제56권4호
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• pp.387-394
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• 2017

벼에 반점미를 유발하는 흑다리긴노린재 [Paromius exiguus (Distant)]의 온도에 따른 산란 특성을 $17.5{\sim}35^{\circ}C$ 8개 항온조건 광주기 14L:10D에서 조사하고 산란모델 구축을 위한 단위 함수 개발 및 생명표 분석을 수행하였다. 성충 수명은 $17.5^{\circ}C$에서 123.8일로 가장 길었고, $32.5^{\circ}C$에서 23.6일로 가장 짧았으며 온도가 올라감에 따라 수명도 짧아졌다. 암컷 한 마리당 총산란수는 $30^{\circ}C$에서 585.2개로 가장 많았으며, $17.5^{\circ}C$에서 21.5개로 가장 적었다. 온도에 기반한 산란 모델 개발을 위해 성충노화율, 총산란수, 성충생존율 및 누적산란율 단위모델을 추정하였다. 총 산란수($r^2=0.83{\sim}0.85$)를 제외한 3개의 단위모델 모두에서 높은 수준의 모델 적합성을 보였다($r^2=0.92{\sim}0.98$). 온도에 따른 흑다리긴노린재 생명표 매개변수들을 추정하였다. 순증가율($R_0$)은 $30^{\circ}C$에서 118.21로 가장 높았다. 평균 세대기간(T)은 $32.5^{\circ}C$에서 32.99일로 가장 짧았으며, 개체군 배수기간(Dt)은 $30^{\circ}C$에서 5.69일로 가장 짧았다. 내적자연증가율($r_m$)과 기간증가율(${\lambda}$)은 $30^{\circ}C$에서 가장 커 각각 0.122, 1.129였다.

• 한국CDE학회논문집
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• 제13권5호
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• pp.342-351
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• 2008

ISO 10303-AP241 is an Application Protocol of ISO 10303, which specifies the representation of AEC facility's life cycle information. The Working Draft of AP241 was submitted to the TC184/SC4 of ISO in July, 2007 by Korean team of ISO TC184/SC4/WG3. This paper introduces the currently developed draft Ap241 core model, and describes the life cycle support modules which are required to represent the life cycle information of AEC facilities. The draft core model is developed as a generic data model which is useful as a basis for implementation in a data warehouse. This core model could be used in combination with reference data such as PLCS RDL, Gellish table and RDL of ISO 15926. These concepts already exists in ISO 10303-AP221, AP239 and ISO 15926. In order to support maintenance and feedback of operational information concerning the AEC facilities, the AP241 team re-used many modules from AP239, and developed various STEP Application Modules which are adapted from the ISO 15926.

• 한국인구학
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• 제24권1호
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• pp.67-90
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• 2001

통계청에서는 출생 및 사망 신고가 동시에 누락되는 영아사망 미신고분을 감안하여 기간 출생률 및 사망률, 생명표상의 기간 영아사망확률을 추정하여 왔다. 보건복지부의 93년 및 96년 출생 코호트 영아사망조사 결과가 발표됨에 따라 통계청이 1971년-1997년 영아사망확률을 재추정하였다. 자료원은 사망신고 자료, 보건복지부 조사. 선진국의 사망신고 자료, 모델생명표 및 일본생명표이었으며, 17가지 방법으로 시산하였다. 최종 방법은 1993년 보건복지부 조사의 사망확률과 사망신고 자료의 1∼4세 사망 확률 관계에 의존하여 1971-1991년 영아사망확률을 추정하였고, 93년은 93년 보건 복지부 조사의 영아사망확률을 사용하였으며, 95년과 97년에 대해서는 93년과 96년 보건복지부 조사에 나타난 영아사망확률 감소율을 적용하였다. 영아사망확률은 Coale-Demeny North Model 을 활용하여 영아사망률로 전환하였다. 통계청이 수집한 98년 화장장 자료로 영아사망 미신고를 보완하여 영아사망률을 추정해 본 결과 화장장 자료는 영아사망수준 추정을 위한 중요한 자료원이 될 뿐만 아니라 신생아사망을 크게 보완하고, 태아사망 및 주산기사망 통계 생산도 가능한 것으로 나타났다.

• 대한기계학회논문집
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• 제18권6호
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• pp.1448-1454
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• 1994

Data which gathered and used in the field of fatigue and fracture mechanics have a lot of uncertainties. In this case, those uncertainties will make scatter band in evaluation of fatigue life and fracture toughness. Thus, the probabilistic analysis of these data will be needed. For determining the fatigue life in mixed mode, using crack direction law and fatigue crack growth law, the problem is studied as a constrained life minimization. Stress intensity factor(SIF) is computed by approximate solution table(Ewalds/Wanhill 1984) and 0th order PFEM. The variance of fatigue life and SIF are computed by differentiation of tabulated approximate solution and 1st order PFEM. And these are used for criterion of design values, principal parameter determination and modelling. The problem of center cracked plate is solved for checking the PFEM model which is influenced by various parameters like as initial crack length, final crack length, two fatigue parameters in Paris Equation and applied stress.

• 가정과삶의질연구
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• 제19권6호
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• pp.241-263
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• 2001

The objectives of this study were empirically to test the reformative model for Korean sacrificial rite and to investigate the effects of demographic variables. the survey was conducted by means of questionnaire with 600 persons located in Seoul. Major findings were as follows ; 1, Sacrificial day ; was displayed (1) dead day (2) holiday in back and forth of dead day 2. Sacrificial time ; was showed (1) 8-9 h. p.m (2) 6-7 h. p.m 3. Sacrificial extent ; was displayed (1) grandparents and parents (2) only parents 4. Participative extent ; was showed (1) Cousin (2) only sons and daughters 5. Sacrificial procedure ; was displayed twice deep bow and 1 minute\`s silent prayer. 6. New year's and Chusok's rite ; was showed (1) simple foods (2) joint leisure time 7. Sacrificial table ; was displayed (1) boiled rice . water . gustoish articles. (2) omission of food table 8. rite\`s socialization ; was showed (1) delivery and marketing sale\`s food (2) special sacrificial restaurant. 9. Womens'and mens'difference ; women were active 7ut men were passive 10. Age's difference ; excepting 30-40, the all generations were more reformative. 11. Number of brothers ; small number of brothers were more reformative than a many number. 12. Sacrificial manager or not , managers were conservative than persons were not managers.

• 한국사회복지학
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• 제61권3호
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• pp.307-328
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• 2009

본 연구는 별거 이혼을 경험한 부부의 결혼지속기간의 추이를 살펴보고, 결혼지속에 영향을 미치는 요인을 살펴보고자 한다. 한국노동패널 1998~2007년 자료를 이용하였으며, 생존표법(life tables)과 비례적 위험회귀모형(cox proportional hazard regression model)을 이용하여 분석하였다. 본 연구의 결과로는 생명표법을 통하여 별거 이혼 추이를 보면 결혼 이후 5년 이내 이혼을 하는 경우가 0.79%, 10년 이내 이혼을 한 경우는 2.12%, 20년 이내 이혼을 한 경우는 5.84%를 나타났다. 결혼지속기간은 남편의 연령, 아내의 연령, 아내의 학력, 남편의 월 평균소득, 부모 부양여부, 그리고 연간가구소득에 유의한 영향을 받는 것으로 드러났다. 젊은 세대일수록, 교육수준이 낮을수록, 경제적 상태가 열악할수록, 부모부양부담이 있을수록 이혼할 위험이 높으므로 이들에 대한 정책적 개입이 필요하다.

• Earthquakes and Structures
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• 제15권6호
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• pp.583-593
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• 2018

Seismic performance is particularly important for life-line structures, especially for long-span transmission tower line system subjected to multi-component ground motions. However, the influence of multi-component seismic loads and the coupling effect between supporting towers and transmission lines are not taken into consideration in the current seismic design specifications. In this research, shake table tests are conducted to investigate the performance of long-span transmission tower-line system under multi-component seismic excitations. For reproducing the genuine structural responses, the reduced-scale experimental model of the prototype is designed and constructed based on the Buckingham's theorem. And three commonly used seismic records are selected as the input ground motions according to the site soil condition of supporting towers. In order to compare the experimental results, the dynamic responses of transmission tower-line system subjected to single-component and two-component ground motions are also studied using shake table tests. Furthermore, an empirical model is proposed to evaluate the acceleration and member stress responses of transmission tower-line system subjected to multi-component ground motions. The results demonstrate that the ground motions with multi-components can amplify the dynamic response of transmission tower-line system, and transmission lines have a significant influence on the structural response and should not be neglected in seismic analysis. The experimental results can provide a reference for the seismic design and analysis of long-span transmission tower-line system subjected to multi-component ground motions.

• Nuclear Engineering and Technology
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• 제55권11호
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• pp.4252-4265
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• 2023

In the case of nuclear power plants near end of their design life, a reassessment of the performance of safetyrelated equipment may be necessary to determine whether to shut down or extend the operation of the power plant. Therefore, it is necessary to evaluate the level of performance decline due to degradation. Electrical cabinets, including MCC and switchgear, are representative safety-related equipment. Several studies have assessed the degradation and seismic performance of nuclear power plant equipment. Most of those researches are limited to individual components due to the size of safety-related equipment and test equipment. However, only a few studies assessed the degradation performance of electrical cabinets. The equipment of various nuclear power plants is anchored to concrete foundations, and crack in concrete foundations is one of the most representative of degradation that could be visually confirmed. However, it is difficult to find a study for analysis through testing the effect of cracks in concrete foundations on the response of electrical cabinet internal equipment fixed by anchors. In this study, using a simple cabinet model considering cast-in-place anchor in uncracked and cracked concretes, a tri-axial shaking table tests were performed and the seismic behavior were observed.

• 한국응용곤충학회지
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• 제44권3호
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• pp.213-217
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• 2005

복숭아혹진딧물(Myzus persicae $S\H{u}lzer$)의 성충 발육과 산자수를 $15-32.5^{\circ}C$, 상대습도 60-70%, 광주기 16L:8D 조건에서 조사하고 생명표를 작성하였다. 복숭아혹진딧물 성충은 $15-25^{\circ}C$까지 수명이 $13.1{\sim}8.4$일로 온도의 상승에 따라 성충기간이 짧아졌으며, 산자수는 $20^{\circ}C$에서 40.8마리로 최고치를 보였으나 $15-27.5^{\circ}C$까지 산자수 차이에 유의성이 인정되지 않았다. 다만 $30^{\circ}C$에서는 8.4마리로 고온에 영향을 받은 것으로 보인다. 또한 복숭아혹진딧물 성충의 일일 산자수는 $25^{\circ}C$에서 5.1마리였고, $15^{\circ}C$와 $30^{\circ}C$에서는 모두 2.8마리로 온도가 높거나 낮아지면서 일일산자수가 적어졌다. 온도별 총 산자수를 이용하여 작성한 산자 모형을 보면 $18.3^{\circ}C$에서 51.0마리로 최고값을 보인다. 또한 약충 발육시 사망률과 성충 수명, 산자수를 이용하여 생명표를 작성하였는데 복숭아혹진딧물은 Ro가 $27.5^{\circ}C$에서 36.5, $r_m$은 0.4, Dt는 1.6, 기간증가율은 1.5, 세대기간은 8.1로 $27.5^{\circ}C$가 복숭아혹진딧물 증가에 가장 적합한 온도로 나타났다.

• 농업과학연구
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• 제33권2호
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• pp.179-193
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• 2006

Technical efficiency of semiforcing watermelon growers is 0.8248 on average, and distributed between 0.6744 and 0.9268. The result showed that semiforcing watermelon growers had by 18% of technical inefficiency and could be assumed that increasing technical efficiency could induce watermelon production more increase. Consequently, if growers' technical efficiency were improved while other environments were constant, watermelon production could be increased. Following the results from the inefficiency effect model, all assumption coefficient such as growers age etc, are significant at 10% level. Estimate of dispersion parameter ${\gamma}$ is 0.89, which confirms those differences between practical output and frontier output were derived from the technical efficiencies among growers. Differences of production system between high and low level growers in production efficiency were showed at side altitude, ventilation and heat-retaining in section of facilities and automation, soil test and calcium application in section of environment management, transplant preparation and duration of pollination in section of crop management and shipment place, sorting degree and management record analysis in section of business management respectively. As a result of analyzing consulting data by using standard diagnosis table of watermelon cultivation under structure which cultivated on semi-forced watermelon growers, gap between high and low level growers was 7.0 points in facility automation section, 7.1 points in environment section, 8.8 points in crop management section and 13.6 points in business management section, respectively, which were the biggest one among them. In case of excluding information-related items from the evaluation index of business management section, changes of business achievement are to occur. Therefore, it is recommended for us to review the standard diagnostic table of watermelon cultivation under structure by dividing evaluation index of management section into management and information.