• Macromolecular Research
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• 제10권1호
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• pp.18-23
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• 2002

We theoretically consider blends of two monodisperse one-end-functionalized homopolymers (denoted by A and B) capable of forming clusters between functional groups (stickers) using weak segregation theory. In this model system resulting molecular architectures via clustering resemble star copolymers having many A- and B-arms. Minimizing the total free energy with respect the cluster distribution, the equilibrium distribution of clusters is obtained and used for RPA (Random Phase Approximation) equations as input. For the case that polymers are functionalized by only one kind of sticker, the phase diagrams show that the associations promote the macrophase separation. When there is strong affinity between stickers belonging to the different polymer species, on the other hand, the phase diagram show a suppression of the macrophase separation at the range of high temperature regime, as well as the phase coexistence between a disordered and a mesoscopic phase at the relatively lower temperatures.

• 한국해양공학회지
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• 제16권2호
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• pp.27-31
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• 2002

The purpose of this study is to investigate the variation of resonance that is possible caused by construction of new port in a practical sea area between the existing port and the new one. The research of amplification that of the sea area was accomplished for the variation of resonance. In this study, long period wave that is observed continuously in the practical sea area was analyzed, and then secondary undulation was reproduced by numerical analysis. As a result of numerical analysis, the first mode resonant periods in the existing port is 640sec, and in the new one is 500sec. On the other hand, we know there is long period wave of 500sec from analyzation of field datas. Because that period this period is the resonant period in the new port. There is also the possibility of secondary undulation cause of resonant.

• 한국실내디자인학회논문집
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• 제14권3호
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• pp.36-45
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• 2005

The aim of this study is to understand the meaning of Form drawing in which Louis 1. Kahn's principal thought is immanent through the detail analysis on design process of the Phillips Exeter Academy Library, based on his sketches and writings. The basic form is composed of three different space: one where students come together in the presence of books, another for the storage of books, and a third for reading in the light. Through the design process in the Exeter library, the basic form is maintained and it is derived from the consideration of the human activities in the library Particularly, the basic form is shaped around the idea that learning necessarily Involved two complementary activities: on the one hand, the quiet introspective act of reading, and the other, the interpersonal exchange of ideas. And the basic form plays an important role in controlling the relationship between program requirements and formal transformations in the design.

• Industrial Engineering and Management Systems
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• 제15권4호
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• pp.298-306
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• 2016

The gap between universities, scientific centers and industrial-production units is one of higher education concerns. In academic entrepreneurship, the university work simultaneously in education, research and entrepreneurship. The universities play a key and important role in providing educational opportunities in economic development. This research aims to develop and expand science as well as help managers to explain the process of technology transfer in entrepreneurial university. This research is applied-developmental type and on the other hand, data driven theories have been used in this study. Current model is generally tried to meanwhile compensate previous shortcomings, include some strengths such as considering domestic factors of Iran as well as update effective factors on the process of technology transfer. Finally the suggested model has been compared with existing well-known models that each one of those models have some drawbacks which have been tried to be minimized in suggested model as much as possible.

• 한국통신학회논문지
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• 제17권2호
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• pp.153-158
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• 1992

본 논문에서는 새로운 세선화 알고리즘을 제안하고 실험결과를 통해 알고리즘의 효율성을 증명하였다. 새로운 세선화 알고리즘에서는 기존의 one-pass 알고리즘에서 드러난 불연속점과 끝점 감소의 문제점을 해결하였다. 특히 본 알고리즘은 하드웨어 구현에 보다 적합하며 고속 동작이 가능하도록 설계되었다.구현된 하드웨어 장치는 가변하는 입력 이미지 너비(25~40 bits)에 선택적으로 대응할 수 있는 실용적인 측면이 있으며 파이프라인 방식으로 고속 동작한다. 본 세선화 장치는 가변 이미지 크기에 대한 융통성과 고속동작의 특성을 가지므로 문자 인식 시스템을 포함한 다양한 이미지 처리 분야에서 매우 실용적으로 적용할 수 있다.

• 호남수학학술지
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• 제40권3호
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• pp.591-600
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• 2018

In [4] Miyazaki and Motegi constructed one family of knots in $S^3$ which admits Dehn surgery producing a Seifert-fibered space over $S^2$ with four exceptional fibers. On the other hand, in [3] using doubly hyper Seifert twisted torus knots, the author constructed six families of knots in $S^3$ which admit Dehn surgery yielding a Seifert-fibered space over $S^2$ with four exceptional fibers. It is questioned in [3] whether or not the family of the knots constructed in [4] belongs to one of the six families of the knots in [3]. In this paper, we give the positive answer for this question.

• 아동학회지
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• 제36권4호
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• pp.17-32
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• 2015

The purpose of the present study was to explore the stability and changes of participant roles in the bullying process, namely, bullies, victims, followers, outsiders, and defenders. In addition, this study examined associated environmental characteristics of both followers and defenders in sixth graders among peer bystanders in the fifth grade. The participants consisted of 461 children from grades 5 to 6(male: 239, female: 222). Data were collected at one year intervals for two data points. The results indicated a moderate consistency in the participant roles the children take across time. Followers and outsiders tended to change differently in their roles one year later. On the other hand, defenders, bullies, and victims tended to keep the same role. The defenders group generally had higher levels of peer attachment, teacher attachment and community's supervision than the followers group. The implications for future research and intervention in bullying were also discussed.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2004년도 제22회 춘계학술대회논문집
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• pp.117-124
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• 2004

The mixing enhancement is one of the most important problems for the development of scramjet engines. The influence of the streamwise vortices produced by a ramp in a unheated supersonic flow on the mixing of twin jets injected from its base was experimentally investigated. Nominal Mach number of the main airstream and of the twin jets at the nozzle exits were 2.35 and 2.0, respectively. Three dimensional velocity distributions near the ramp with and without injection were measured by Particle Image Velocimetry (PIV). A pair of counter rotating streamwise vortices could be seen behind the injector without injection. On the other hand, two pairs of streamwise vortices could be seen with injection. The outer one had the same direction as the vortex pair produced by the ramp, but they were stronger than those produced by the ramp. The inner ones had the opposite directions to the outer ones. It is considered that these vortices enhance the mixing near the injector.

• 대한가정학회지
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• 제41권1호
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• pp.111-124
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• 2003

This study tries to analyse the relationship between sexual attitudes and behaviors on the one hand and parent-child relationships on the other among college students in Korea. 1,237 students from different areas were surveyed. Sexual attitudes are subdivided into four aspects, namely, permissiveness, instrumentality, emotional exchange, and responsibility, and sexual behaviors into indirect and direct ones. Results are as follow. First, sexual attitudes and behaviors among the subjects are found being different, depending on such variables as sex, religion and dating experiences. Secondly, while being related with both indirect and direct sexual behaviors, the variable of co-residence with parents is significantly related with the aspect of permissiveness, but not with the other three aspects. Thirdly, the parent-child communication is significantly related with sexual attitudes. One who has an open pattern of communication with parents tends to have more desirable sexual attitudes and is better able to control sexual behaviors.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 G
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• pp.2932-2934
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• 1999

In this paper, a scheme for recognition of handwritten digits using a multilayer neural network trained with the back-propagation algorithm using generalized delta rule is proposed. The neural network is trained with hand written digit data of different writers and different styles. One of the purpose of the work with neural networks is the minimization of the mean square error(MSE) between actual output and desired one. The back-propagation algorithm is an efficient and very classical method. The back-propagation algorithm for training the weights in a multilayer net uses the steepest descent minimization procedure and the sigmoid threshold function. As an error rate is reduced, recognition rate is improved. Therefore we propose a method that is reduced an error rate.