• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2012.03a
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• pp.49-49
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• 2012

바닥재 자카드직물에 사용이 예상되는 LMP(low meltig polyester) 복합사는 사염 시 높은 수축율 및 열융착의 가능성 때문에 일반적인 폴리에스테르의 염색조건에서는 염색이 불가하다. 따라서 적정의 수축율 내에서 가능한 염색조건에 대해 고찰하였다. LMP 복합사는 웅진케미컬에서 생산된 Regular PET/LMP(75:25) 260d/48f 원사를 사용하였다. 수축율은 KS K 0215에 준하여 측정하였다. 염색은 E-type 및 S-type(Foron Dark Blue S-WF) 분산염료를 사용하였으며, E-type 중에서는 아조계(Lumacron Blue SERL 200%) 와 안트라퀴논계(Foron Blue E-BL 150)의 2 종류를 사용하였다. 염색된 시료는 현미경 단면사진을 이용하여 염료의 내부확산을 확인하였으며, 환원세정 전후의 K/S 값을 측정하였다. LMP원사의 수축율을 시험한 결과 $90^{\circ}C$에서 9% 정도의 수축율을 나타내어, $90^{\circ}C$ 이상에서는 사염이 어려운 것으로 나타났다. 따라서 염색온도는 $80^{\circ}C$와 $90^{\circ}C$로 하였다. S-type의 염료를 이용한 경우 $90^{\circ}C$에서 4일 이상 염색해도 염착이 이루어지지 않아 대상 염료에서 제외하였다. E-type 염료인 경우 아조계는 흡진율은 높았으나 내부 regular PET에의 확산이 매우 느리고, 안트라퀴논계는 상대적으로 확산이 빠른 것으로 나타났다. 안트라퀴논계 분산염료는 $80^{\circ}C$에서 내부로의 확산에 4일 이상이 소요되며, $90^{\circ}C$에서는 2일 이상이 소요되었다. 이 후 환원세정에 의한 K/S 값의 변화 및 마찰견뢰도를 시험하였으며, 환원세정 후의 섬유단면 사진을 통해 염료의 migration성을 평가하였다.

• Korean Journal of Community Nutrition
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• v.21 no.3
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• pp.256-264
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• 2016

Objectives: This study aimed to evaluate the diet and health status of elderly women according to the family type. Methods: A total of 307 elderly women participated in this study were divided into one of three groups according to their family type: residing with spouse (RSP; n=88), residing with son or daughter (RSD; n=119), and residing alone (RAL; n=100). Chisquare test was used to assess dietary habits and health status of the subjects by the family types. Results: Results demonstrated significant associations between eating regular meals, person preparing meals, coffee intake, and bone fracture experience and family type. Among the three groups, the RSP and RAL groups had a higher percentage for preparing meals by themselves (p<0.001) than the RSD group. The RAL group had a lower percentage for eating regular meals (p<0.01) but a higher percentage for bone fracture experience (p<0.05) than the other groups. There were no significant differences in monthly allowance, self-estimated health status, physical activity, exercise, drinking, and dietary habits such as frequency of consumption of dairy, beans, eggs, fish, meat, fruits, and vegetables among the three groups. Conclusions: The results showed that elderly women residing alone without a son, daughter, or spouse had more diet-related and health problems such as irregular meals and high bone fracture experience. These findings suggested that elderly women residing alone need more attention and support.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.29 no.1
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• pp.7-14
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• 2017

This study carried out a numerical analysis of the effects of hot waste water supply on the performance of a Type II absorption heat pump. There are two types of hot waste water supply, regular series flow and reverse series flow. Also it investigated the interaction between each type of flow and heat exchange solutions. As the effectiveness of heat exchange solutions increase, the steam generation and (COP) increase as well. If the effectiveness of a heat exchange solution is lower than 0.566, the steam generation rate of the reverse flow is lower than that of the regular series flow. A high effectiveness of heat exchange solution is therefore required to make a larger amount of steam in reverse series flow than with ordinary series flow. The COP difference between the two types of flow decreases with the increasing effectiveness of the heat exchange solution. Thus, a reverse flow type absorption heat pump can match the high steam generation rate and COP of the ordinary flow type when a highly effective heat exchange solution is applied.

• Journal of the Korean Wood Science and Technology
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• v.36 no.3
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• pp.9-16
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• 2008

Ribbed birch (Betula costata Trautv.), Japanese larch (Larix kaempferi (Lamb.) Carr.), and tulip tree (Liriodendron tulipifera L.), were used as experimental specimens to measure the sound absorption coefficient with various resonator types, regular resonator (Type-R), eccentric resonator (Type-E), aligned resonator (Type-A), and screwed resonator (Type-S). Resonators consisted of the simple perforation by hand drilling. Sound absorption performances of the resonators installed perforations were better than those of untreated specimens. They were varied with the resonator's type and wood species. Increased area by a wood screw gave no significant change on the sound absorption.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.36 no.4
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• pp.369-375
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• 2023

In this paper, we compared and analyzed the power load patterns of dormitory buildings and office buildings to use them as basic data (demand analysis and capacity design) for the design and operation of microgrids for multi-use facilities, and the following conclusions were got. During the daytime on regular weekdays, the power consumption load pattern of office buildings was relatively large at 264.0~332.3 kWh, and during the evening hours, the power consumption load pattern of dormitory buildings was relatively large at 233.0~258.3 kWh. In the case of vacation, during the daytime on weekdays, the power consumption load pattern of office buildings was relatively large at 279.1~407.4 kWh, and in the evening, the power consumption load pattern of dormitory buildings was relatively high at 280.1~394.1 kWh. During the daytime on regular weekends, the power consumption of dormitory-type buildings was relatively high at 133.5~201.6 kWh, and it was found that the power consumption of dormitory-type buildings appeared relatively high at 187.5~252.1 kWh. During a vacation in the daytime on weekends, the power consumption of dormitory-type buildings was found to be 186.5 kWh~ and 218.6 kWh. The increase in power consumption during a vacation (December-February) compared to normal (April-June) was thought to be due to an increase in electricity demand, and the reason for the higher power consumption in dormitory buildings during the vacation was due to reduced working hours in office buildings.

• Bulletin of the Korean Mathematical Society
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• v.52 no.4
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• pp.1077-1095
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• 2015

In this paper we study equivariant crossed modules in its link with strict graded categorical groups. The resulting Schreier theory for equivariant group extensions of the type of an equivariant crossed module generalizes both the theory of group extensions of the type of a crossed module and the one of equivariant group extensions.

• Journal of Photoscience
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• v.3 no.3
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• pp.159-161
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• 1996

Photosensitivity of silver halide emulsion depends on the properties of the microcrystals. Size, shape, grain distribution and chemical composition as well as the inner structure or the topography of the latent image specks affect on the optical properties and play an important role in the photographic process. In the present paper, a study on the sensitization of emulsion containing AgBrClI core/shell grains showed that for the given size, shape, halide content and crystal habit, under the optimal conditions the photosensitivity of the heterojunction type grains are different from that of the common regular grains. The optimal photosensitivity was obtained at the iodide content of 2.0 mo1%.

• Journal of applied mathematics & informatics
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• v.11 no.1_2
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• pp.125-141
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• 2003

This paper treats the conditions for the existence and stability properties of stationary solutions of reaction-diffusion equations of Gierer-Meinhardt type, subject to Neumann boundary data. The domains in which diffusion takes place are of three types: a regular hexagon, a rectangle and an isosceles rectangular triangle. Considering one of the relevant features of the domains as a bifurcation parameter it will be shown that at a certain critical value a diffusion driven instability occurs and Turing bifurcation takes place: a pattern emerges.

• Journal of the Chungcheong Mathematical Society
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• v.20 no.1
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• pp.65-70
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• 2007

We study the existence of nontrivial solutions of the Gradient type Dirichlet boundary value problem for elliptic systems of the form $-{\Delta}U(x)={\nabla}F(x,U(x)),x{\in}{\Omega}$, where ${\Omega}{\subset}R^N(N{\geq}1)$ is a bounded regular domain and U = (u, v) : ${\Omega}{\rightarrow}R^2$. To study the system we use the liking theorem on product space.

• The Pure and Applied Mathematics
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• v.2 no.2
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• pp.103-110
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• 1995

In their recent paper[2], they show that the existence theory for the analytic operator-valued Feynman path integral can be extended by making use of recent developments in the theory of Dirichlet forms and Markov process. In this field, there is the necessity of studying certain generalized functionals of the process (of Feynman-Kac type). Their study have been concerned with Feynman-Kac type functionals related with smooth measures associated with the classical Dirichlet form (associated with the Laplacian).(omitted)