• Bulletin of the Korean Mathematical Society
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• v.28 no.2
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• pp.201-205
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• 1991

• Journal of Physiology & Pathology in Korean Medicine
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• v.21 no.1
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• pp.258-262
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• 2007

The objective of this study is to offer some standards for the classification of Sasang Constitutions according to age groups through analyzing the characteristics of their body shape and comparing with their frontal silhouettes. The subject of this study were 192 female and 167 male patients who aged from 17 to 64 in Pusan. They were treated with Sasang Constitutional medicine. 5 Heights, 7 widths of their body were measured with modified IBS-2000. Collected 12 anthropometric data was analyzed by T-test and ANOVA. Width is more suitable than height in estimating Sasang Constitutions regardless of gender differences. W2_1, W2_2, W2_4, W2_5, W2_51 are suitable to estimate Sasang Constitutions regardless of gender differences and age groups. in case of female, H45 in 33${\sim}$64 age group is suitable to estimate Sasang Constitutions. In case of male, H12, W2_1 in 17${\sim}$32 age group and H01, W2_0, H23 in 33${\sim}$64 age group are suitable to estimate Sasang Constitutions. All Sasang Constitutions with the exception of Taeyangin female have to consider age groups, when we estimate Sasang Constitutions. From the above results, we have to consider not only gender differences but also age groups to classify Sasang Constitutions from body shape point of view.

• The Korean Journal of Applied Statistics
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• v.26 no.5
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• pp.767-783
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• 2013

Generalized Method of Moment(GMM) is a popular estimation method to estimate model parameters in empirical financial studies. GMM is frequently applied to estimate diffusion models that are basic techniques of modern financial engineering. However, recent research showed that GMM had poor properties to estimate the parameters that pertain to the diffusion coefficient in diffusion models. This research corrects the weakness of GMM and suggests alternatives to improve the statistical properties of GMM estimators. In this study, a simulation method is adopted to compare estimation methods. Out of compared alternatives, NGMM-Y, a version of improved GMM that adopts the NLL idea of Shoji and Ozaki (1998), showed the best properties. Especially NGMM-Y estimator is superior to other versions of GMM estimators for the estimation of diffusion coefficient parameters.

• Journal of Navigation and Port Research
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• v.38 no.1
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• pp.65-71
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• 2014

Gyeongbu and Namhae expressways in the country, are the major arterial highways which are connected with the Busan port in the north-south and east-west directions, respectively, and required to study the traffic characteristics about the hourly volume factors(K-factor) by concentrated midium-size and large-size cargo trucks of 20% or higher in expressways. We therefore attempted to predict the K-factor in expressways through the correlation analysis between K-factor and K-factor estimates on the basis of the short-term VDS data collected at the basic segments of the above major expressways. As a result, power model appeared to be appropriate in predicting K-factor by the K-factor estimate based on VDS data for 7 days with a high explanatory power and validity.

• Child Health Nursing Research
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• v.1 no.1
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• pp.16-25
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• 1995

The purpose of this study was to estimate primiparas' perceptions of their newborns and compare the changes of their perceptions related to feeding methods between the time I (post-partum 2nd-3rd day) and the time ll (post-partum 1st month). At the time Ⅰ, bottle-feeding method was 100% because mothers were separated from their babies. At the time Ⅱ, the methods of feeding were breast-feeding(29.7%), bottle-feeding(30.7%), mixed feeding(39.6%) .The subjects of this study were 101 primiparas. Data were collected between May to October 1994, using the Neonatal Perception Inventory devised by Broussard(1963) and added by Lee Ja Hyurg(1986) .The results of this study are as follows : 1. There was no significant difference of primiparas' perceptions of their newborns according to general characteristics. 1) The younger tended to estimate that newborns were less capable, and perceived that it would be more difficult for them to take care of babies. 2) There was no difference of mothers' perceptions of their babies according to having a job or not. 3) The lower educated tended to estimate that newborns were less capable, and perceived that it would be more difficult for them to take care of babies. 2. There were some changes of primiparas' perceptions of their babies related to feeding methods between the time I (post-partum 2nd-3rd day) and the time Ⅱ (post-partum 1st month).1) At the time Ⅰ, Breast-feeding mothers estimated that newborns were less capable, and perceived that it would be more difficult for them to take care of babies. But they showed positive perceptions at the time Ⅱ (P<0.05, p<0.1) 2) At the time Ⅰ, Bottle-feeding mothers tended to estimate that newborns were more capable, and perceived that it would be more easy for them to take care of babies. But they showed negative perceptions at the time Ⅱ 3) For breast-feeding mothers, positive-positive group was 53%, positive-negative group was 20%, negative-positive group was 10%, negative-negative group was 17%. For bottle-feeding mothers, positive-positive group was 55%, positive-negative group was 32%, negative-positive group was 10%, negative-negative group was 3%.

• Korean Journal of Construction Engineering and Management
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• v.3 no.3 s.11
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• pp.84-93
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• 2002

It is important to reduce construction duration in private sales and lease business for management of cash now in the owner's aspect. However, because the concept of standard duration hasn't been established in the domestic construction industry, it is difficult to present the standard of duration estimate. To solve this problem, this paper (1) grasped the effecting elements considered in the duration estimate through referring the existing literature related to the schedule management, (2) accomplished a comprehensive research on actual duration based on office buildings through the questionnaire survey and the expert interview, (3) presented the collected research data analyzed by effecting elements as standard duration, (4) compared standard duration with actual duration of countries advanced in construction projects as well as analyzed them, and then (5) raised the necessity of duration reduction in the domestic construction industry.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.16 no.2
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• pp.23-40
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• 2013

The natural environment restoration industry has been newly included in the environment area of engineering technology. Accordingly, the enactment of a standard of estimate for determining the 'Cost plus Fixed Fee' method has become necessary for the implementation and vitalization of natural environment restoration projects. The purpose of this study is to determine the standards for which the prices for engineering projects are calculated with respect to the enactment of an engineering project standard of estimate in the natural environment restoration field. These include the scope of the technological work, standard area, manpower requirements by technical grade that are necessary for carrying out the technological tasks. Relevant laws and regulations, systems and precedent case studies were investigated and analyzed to establish a price calculation standard. The overall results of the analysis were used and applied to questionnaires, public hearings, and expert delphi techniques. The study showed the following results： The scope of the technological work was categorized into 'Biotopes', 'Eco-corridors' and 'Ecological restoration'. The standard area was set up as $1,000m^2$ for 'Biotopes' and $5,000m^2$ for 'Eco-corridors' and 'Ecological restoration'. The manpower requirements by technical grade that are necessary for carrying out the technological tasks were determined. The suitability of the costs, standard area, manpower requirements by technical grade of ordered engineering projects that are determined by applying the standard of estimate for natural environment restoration that may be enacted pursuant to this study may be effectively investigated and analyzed. Moreover, further studies on the calculation of standard prices that can ensure the stability of natural environment restoration projects will be necessary.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.937-942
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• 2005

It is necessary to estimate the runoff hydrograph and peak flood discharge using law of probability for synthetic flood control policy and design of hydraulic structures. Rainfall analysis is needed in the process of peak flood discharge estimation and the time distribution of a design rainfall is a very important process in the analysis. In this study, we estimate design flood for a small urban basin and a rural basin of medium scale which have different travel times. The Huff method is widely used in Korea for the time distribution of design rainfall to estimate design flood. So, we use Huff method and a conceptual method which is suggested in this study for the comparative purpose. The 100-year frequency rainfall is used to estimate design flood for each basin and the design flood is compared with the existing design flood. As the result, the design flood is overestimated $14.6m^3/sec$ by Huff method and is underestimated $70.9m^3/sec$ by a conceptual method for the rural basin. For the small urban basin, the design flood is excessively overestimated $294.65m^3/sec$ by Huff method and is overestimated $173m^3/sec$ by a conceptual method. The reason of excessive overestimation by Huff method in the small urban basin is that the increased rate of rainfall intensity according to the decrease of duration is large and the duration exceeds the time of concentration when the increased rainfall intensity is concentrated in a quartile. Therefore, we suggested a conceptual method for the time distribution of design rainfall by considering the rainless period and duration. Especially, the conceptual method might be useful for the small urban basin with short concentration time which the design flood is overestimated by Huff method.

• Science of Emotion and Sensibility
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• v.6 no.2
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• pp.49-58
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• 2003

In this study, there is main purpose to provide useful data in order to use the Hangul as a design factor. Also, there are two subordinate goals. First, to analyze standards as people estimate Hangul characters. Second, to understand people's preferences about Hangul characters and then, to catch formal features about that characters. In first result, It is known that people estimate Hangul characters based on four standards. They are neat, soft, cyber and plain standards. As second consequence, preferential Hangul characters have pretty, intimate, refined, soil, elaborate, forthright, tidy image. And they are square shape as a whole, less decorative, round edge style.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.2C
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• pp.83-92
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• 2011

Elastic modulus in rockmass is an important factor to represent the characteristic of rock deformation and is used to estimate the displacement due to tunnel excavation. Nevertheless, the study to estimate the elastic modulus, which condisiders the rock type and joint characteristics (joint shear strength and joint inclination angle), has been done in less frequency. Accordingly, this study is aimed at providing the method to estimate the elastic modulus of rockmass in the various rock and joint conditons and the results grasped from the study. For this purpose, the 2D discrete numerical analysis will be carried out and the displacements due to tunnel excavation will be investigated with the consideration of rock and joint conditions. Then the displacement results will be used to estimate the elastic modulus of rockmass in which rock and joint conditions are considered with the utilization of the elastic theory of circular tunnel. The results of elastic modulus, which considers the conditions of various rock and joint, would be expected to have a great practical use in field.