• 대한기계학회논문집B
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• 제24권10호
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• pp.1388-1398
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• 2000

A pipe prover is a flowmeter calibrator used in flow measurement field. Gravimetric and volumetric methods were applied to determine the basic volume of the pipe prover. Uncertainty of its basic volume measurement was evaluated in accordance with the procedure recommended by International Organization for Standardization. The combined standard uncertainty of determining the basic volume was estimated from the sensitivity coefficient and the standard uncertainty of independent variables. It was found that the uncertainties of the weighing and volume measurements have dominant influence on that of the basic volume determination. With the quantitative analysis of the sensitivity coefficient, the contribution of the each variable uncertainty to the combined standard uncertainty of the basic volume is shown clearly.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국제학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.777-781
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• 1988

A method for weighing fruits without separating them from stem is proposed. The base of stem is fixed and a fruit or a cluster of fruits is forced to vibrate. The approximated vibration model is constructed by the use of Transfer Matrix Method. The natural frequency (w) in this model can be represented as a function of weight elements, and the length and stiffness of branch elements of stem. With this function, only w is possible to measure. However, several small weights whose weights are known are attached to weight elements in various combinations. From these equations, unknown parameters are determined so that the weight of each fruit can be obtained by a non-destructive method.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.437-437
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• 2000

It is more difficult to accurately weigh vehicles in motion than to weigh standing vehicles. The difficulties in weighing vehicles result from sensor Limitations as well as dynamic effects induced by vehicle/pavement interactions, This paper presents a method for improving the accuracy of measured axle load information using the so-called adaptive footprint tire model. The total vehicle weight as well as individual axle weight information are obtained experimentally using two piezoelectric sensors. Results are obtained for a light car, mid-site passenger car, and 2 dump trucks with known weight experimental results show that the proposed method using the tire model is accurate.

• 한국강구조학회 논문집
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• 제17권6호통권79호
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• pp.727-736
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• 2005

본 연구에서는 사장교의 적절한 초기평형상태 결정을 위하여 최소자승법을 이용한 케이블 장력 결정 방법을 제시하였다. 본 방법은 거더의 케이블 지지점을 지점으로 한 연속보로부터의 처짐 및 모멘트 등을 목표치로 하고 케이블을 포함한 사장교 전체계 해석으로부터 구해진 응답과의 차이를 오차로 정의하여 거더 및 주탑의 오차를 최소화하는 방법이다. 특히, 주탑 모멘트, 거더 모멘트, 그리고 처짐의 보정 정도를 가중행렬을 도입하여 선택적으로 조절할 수 있으며, 여러 가지 사장교 형식에 대한 수치예제 및 기존 연구와의 비교를 통하여 본 방법의 효율성 및 타당성을 검증하였다.

• 한국경영과학회지
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• 제25권3호
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• pp.109-124
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• 2000

For rational human value judgement and evaluation, provision of clear evaluation data, objective value judgement criteria, and properly generalized methods are required. For instance, this is true for software quality evaluation, and the measure of software quality and the weighting method of evaluation target directly affect final decisions. However it is not easy to find a generalized method for the software quality evaluation or product selection, because of its complex characteristics. In this paper, we apply the qualitative preference method based on quantitative belief functions to find a general weighing method for the software quality evaluation. In particular, the qualitative preference method, in which the differentiated preference expression is possible, is conceptually expanded for general applications in future. For this purpose, we hierarchically differentiate the strong preference relation from the weak preference relation, and show an example of quantification of software quality evaluation on different applications, by comparing the qualitative preference method with AHP. We believe that the application domain of this method is not limited to the software quality evaluation and it is very useful to apply this results to other SE areas, e.g., metric selection with different views and riority determination of practices to be assessed in the SPICE.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2000년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall 2000
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• pp.251-260
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• 2000

Seismic performance evaluation systems require rational classification of structure systems, proper evaluation criteria, and their scoring index for synthesis. Current seismic performance systems need expert judgments based on collection of available data, approximate analysis of important items, and various scoring system. This study presents a three-step seismic performance evaluation system for building structures in Korea. Each evaluation step determines the seismic performance and the method depends on the degree of refinement of analysis. The preliminary step evaluation involves the global attributes of structures such as vertical irregularity, asymmetric plan, redundancy, and age of structures. The second step requires an elastic analysis for estimation of forces acting on critical sections and checks the strength and ductility. The final step requires inelastic capacity of structures. Each stephas own evaluation scheme with proper weighing factor dependent on the importance and consequence. This study applies the fuzzy theory to a scoring method that synthesizes the individual quantity to a representative value.

• Journal of Nutrition and Health
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• 제29권10호
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• pp.1105-1111
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• 1996

Breast milk production and factors related to milk production were examined by test-weighting method in the part of Kangwon Province longitudinally from 0.5 to 5 months of postpartum. Milk production of total mothers averaged 639, 789, 871, 843, 848 and 851g/day at 0.5, 1, 2, 3, 4 and 5 months of postpartum respectively. Mean Milk production of multiparae appeared significantly higher than those of primiparac. The number of feed per day showed decreasing trend from 9.6 to 8.4 during the lactation. Mature milk production had a correlation with transitional milk production and no correlation with infants weight at birth, gestational period and weight gain during pregnancy of mothers. The energy, protein and lipid consumption of total mothers had a positive correlation with breast milk production.

• Journal of Nutrition and Health
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• 제30권5호
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• pp.506-511
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• 1997

In order to investigate the body weight change and human milk intake of breast-fed infants, we examined thirty-three infants with test-weing method in Sokcho area during the first 5 months of lactation. The average birth weight of infants was 3300g. They grew 3300, 3805, 4676, 5878, 6786, 7403, and 8111g when they became 0.5, 1, 2, 3, 4, and 5 months old. The is human milk intake was 515, 650, 718, 731, 746 and 796g/day during the lactatin. Human milk intake of boys was significantly higher than that of girls at 1(p<0.05), 2(p<0.01), and 3(p<0.01) months of lactation. During lactatin, the number of feedings per day decrerased. The human milk intakes per feeding had increased from 54.4g at 0.5 months to 98.9g at 5 months of lactation The human milk intake on infants was not affected by gestational period and birth weight. From this survey, we found a difference between boys and girls in human milk intake.

• 한국국방경영분석학회지
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• 제25권1호
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• pp.75-86
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• 1999

The selection criteria of an Authorized Stockage List (ASL) in the Army is based on Army Regulation(AR)409. However, the current selection method of ASL is not considered in cost, weight and volume of repair parts. This paper is focused on developing for a new selection model taking account of cost, weight and volume of repair parts. Goal programming is utilized in order to consider weighted priorities. Different units of cost, and volume are normalized for using weighing value. Real data of a field division are applied to the model. Results of the new selection model are more reduced in cost, weight and volume than those of the previous method.

• 대한수의학회지
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• 제55권1호
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• pp.47-52
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• 2015

The purpose of this study was to determine if contrast media would enhance visualization of the endocardium for assessment of left ventricle (LV) function. In addition, differences between pre- and post-contrast evaluation for the cardiac output measurements including the modified Simpson's method and automated contour tracking (ACT) method were examined. Ten clinically healthy adult beagle dogs (three males and seven females) between 2~3 years old and weighing 6.6~10.8 kg were used. Echocardiographic examinations were performed to compare pre- and post-contrast LV endocardium visualization using a segmental scoring method. Two different methods for measuring cardiac output were also compared. LV visualization was significantly enhanced in post-contrast echocardiography (p < 0.01). Significant differences between pre- and post-contrast measurements for the modified Simpson's method (p < 0.05) were also observed. No significant difference was found for the ACT method. Contrast echocardiography provides better LV chamber opacification and significantly improves wall segment visualization. Furthermore, contrast echocardiography for measuring cardiac output is helpful for the modified Simpson's method.