• Architectural research
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• 제16권4호
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• pp.193-202
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• 2014

This research started from the premise that Jacques Perret, "Savoyard gentleman" of the 17th century - whose only legacy consists of Des fortifications et artifices, a book of fortified town designs - is still an elusive figure in the history of architecture and deserves to be further investigated. In particular, attention needs to be paid to the lack of any attempt by scholars to define his actual professional status and cultural background: was he an architect, an engineer, a professional or an amateur? The intention of this paper is therefore to shed some light on this question by examining selected contents of his book describing five projects of fortified towns. Plates and descriptions are carefully analyzed related to the engineering (defensive structures) and architectural (city layouts, buildings) content. The figure that emerges is that of an articulate personality who does not fit either in the architectural or in the military engineering professional world. In the field of engineering, he simultaneously demonstrated the competence of a professional and the na$\ddot{i}$vety of an immature technician, while in the field of architecture he showed an advanced creativity alongside several technical and theoretical misunderstandings. From the analysis in this study, the assumption is formulated that Jacques Perret was a connoisseur, i.e. an erudite without any direct involvement in real professional activity. This work is intended to provide a hypothesis for further researches that, hopefully, will deepen our understanding of several other aspects of Perret's complex identity and work.

• JSTS:Journal of Semiconductor Technology and Science
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• 제13권4호
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• pp.331-341
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• 2013

In the present work, the effect of the gate-to-drain capacitance ($C_{gd}$) on the noise performance of a symmetric tied-gate $In_{0.52}Al_{0.48}As/In_{0.53}Ga_{0.47}As$ double-gate HEMT is studied using an accurate charge control based approach. An analytical expression for the gate-to-drain capacitance is obtained. In terms of the intrinsic noise sources and the admittance parameters ($Y_{11}$ and $Y_{21}$ which are obtained incorporating the effect of $C_{gd}$), the various noise performance parameters including the Minimum noise figure and the Minimum Noise Temperature are evaluated. The inclusion of gate-to-drain capacitance is observed to cause significant reduction in the Minimum Noise figure and Minimum Noise Temperature especially at low values of drain voltage, thereby, predicting better noise performance for the device.

• 마이크로전자및패키징학회지
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• 제24권1호
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• pp.9-16
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• 2017

Thermoelectric power generation (TEG) technology with high figure of merit (ZT) has become the need of the modern world. TEG is a potent technology which can tackle most of the environmental issues such as global warming, change in climatic conditions over the globe, and for burning out of various resources of non-renewable energy like as petroleum deposits and gasolines. Although thermoelectric materials generally convert the heat energy from wastes to electricity according to the theories Seebeck and Peltier effects yet they have not been fully exploited to realize their potential. Researchers are focusing mainly on how to improve the current ZT value from 1 to 2 or even 3 by various approaches. However, a higher ZT value is found to be difficult due to complex thermoelectric properties of materials. Hence, there is a need for developing materials with high figure of merit. Recently, various nanotechnological approaches have been incorporated to improve the thermoelectric properties of materials. In this review paper, the authors have performed a thorough literature survey of various kinds of TEG technology.

• 대한전자공학회논문지SD
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• 제39권4호
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• pp.55-62
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• 2002

양방향 ADM 노드에서 자동이득제어를 위해 발진고리형 고정이득 EDFA를 적용할 경우 잡음지수 특성을 검토하고자 한다. 이를 위해 소신호 입력인 경우에 한해서 발진보상광의 발진방향 및 발진파장에 따른 잡음지수 특성을 평균밀도반전 알고리즘에 의해 계산하였고 실험적으로 확인하였다. 그 결과 단파장의 발진보상광이 광섬유고리에서 후방 발진을 일으킬 경우가 양방향의 소신호 잡음지수 측면에서는 가장 양호한 조건으로 판명되었다.

• 한국과학교육학회지
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• 제16권3호
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• pp.278-285
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• 1996

High school students' achievements in algorithmic problems, and figure-formatted and textual-formatted conceptual problems concerning stoichiometry, gaseous state, and solution, were measured by the Chemistry Problem Solving Ability Test. The relationships among the achievement scores in the three types of problems and cognitive variables such as logical thinking ability, mental capacity, and field dependence/field independence were examined. The portion of variance of explanation for each achievement score was also studied by a multiple regression analysis. The results showed that logical thinking ability was significantly correlated with the achievement score in the algorithmic problems, and accounted for the significant portion of the variance of the score. Mental capacity accounted for the significant portion of the variance of the score in the figure-formatted conceptual problems. Although field dependence/field independence was significantly correlated with all the achievement scores, it did not significantly account for any scores in multiple regression analyses. However, the magnitudes of correlation coefficients among the achievement scores were higher than those between the achievement scores and cognitive variables. The best predictor for each score was also found to be one of the other achievement scores. Educational implications are discussed.

• 한국의류산업학회지
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• 제6권3호
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• pp.329-335
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• 2004

The purpose of this study was to investigate the differences between the body cathexis, appearance management behaviors and satisfaction with apparel fit according to physical figure of college women who had deep interests in their body and appearance. Data for this study was obtained from 413 college women in Taegu and Kyungpook Province. Means, t-test, ANOVA and Scheffe's post hoc comparison were used in data analysis. The result of this study were; 1. It was found that both body Cathexis and fit satisfaction of college women were generally low. College women were less satisfied with their body and fit of apparel. The unsatisfied body parts were thighs, abdomen and hip. 2. Significant differences in Satisfaction with apparel fit were found in skirt length, slacks length, thigh according to height and significant difference in satisfaction with apparel fit were found in armhole, abdomen, calf according to weight. 3. Significant differences in appearance management behaviors were not found according to height, but significant differences in diet, exercise and clothing use were found according to weight. Also significant differences in diet and clothing use were found according to R$\ddot{o}$hrer index.

• 한국정보통신학회논문지
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• 제9권3호
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• pp.647-653
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• 2005

본 논문에서는 캐스코드 결합 HBT의 이미터와 베이스단에 인덕터를 설치하여 저잡음과 고이득 특성을 동시에 나타내는 MMIC-LNA 증폭기를 설계하였다. 제작된 MMIC 증폭단은 3mA, 2.7V의 바이어스 조건에서 이득은 3.7GHz에서 약 19dB, 잡음지수는 2.7dB를 보였으며, 35dBc의 이미지시호 제거 특성을 보였다. 저 잡음과 고 이득 특성을 갖는 캐스코드 MMIC 증폭단을 이용하여 마이크로파 수신기의 전단부의 설계가 가능함을 보였으며 이미지 제거 필터의 성능을 만족시키기 위하여 능동필터와 함께 설계할 경우 RF 수신 전단부의 완전한 MMIC 설계가 가능함을 알 수 있었다.

• 한국학교수학회논문집
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• 제16권4호
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• pp.821-840
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• 2013

중학교 기하에서 등장하는 도형의 정의는 그 모양에서 시각적으로 확인할 수 있는 단순한 용어의 뜻으로만 생각하기 쉽다. 그러나 도형의 정의에 대한 낮은 이해도는 이와 같은 도형 정의에 대한 도구적 이해의 한계를 보여주고 있다. 이 연구는 영재중학생들을 대상으로, Freudenthal이 주장했던 도형 성질의 논리적 조직화에 의한 정의의 재발명과정을 구체적으로 실행하여 분석하였다. 그 결과 영재 학생 중 상당수가 도형 성질의 논리적 조직화 경험을 통하여, 도형을 왜 그렇게 정의하는 것인가, 또 다른 성질로는 정의할 수 없는가와 같은 도형 정의의 관계적 이해와 관련된 질문에 대해 깊이 이해하고 있음을 확인할 수 있었다. 이 연구에서 분석한 논리적 조직화에 의한 정의의 재발명과정은 중학교 기하교육의 문제를 반성하고 새로운 대안을 모색하는데 도움이 될 수 있을 것이다.

• 패션비즈니스
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• 제12권2호
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• pp.153-164
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• 2008

The author of this study would like to consider the influence that socio-cultural attitudes to the appearance offemale college students have on body image and satisfaction. The results of this study were as follows: 1. According to the result of the analysis of the relevant factors of socio-cultural attitudes on outward appearance of women college students, three factors which are named "Internalization", "Awareness" and "Non-confirmity" have been drawn out: 2. According to the result of the factor analysis for the evaluation of the behavioral figure images of women college students, three factors which are named "Figure Management", "Weight Management" and "Figure Valuation" have been drawn out: 3. Socio-cultural attitudes to appearance have correlation with body image, BMI and self-satisfaction of body and appearance: 4. According to consideration of the result of the study of the Influence that socio-cultural attitudes to the appearance have on physical satisfactionof each physical part, it is showed that they have managed their physical weight according to the satisfaction degree of weight and other circumference items: 5. Socio-cultural attitudes to appearance have high correlation with appearance management and weight management.

• 한국의류학회지
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• 제31권11호
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• pp.1621-1633
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• 2007

The purpose of this research was to evaluate the size fitness of ready-made jacket and their demands through the survey of the middle aged women, and having them try on the jackets, and present the basic data on the ways to increase the fitness by better size controls. The jackets, that were modified and improved through the experiment of the women with triangle-figure in their 50s, were compared and evaluated. The experiment showed a difference in the appearance and the motional function. The triangle-figure had the lowest fitness, thus most uncomfortable. The triangle-figure is characterized by the large waist, leaving small space between body and clothes. This creates the wrinkles in bust or waist area, making it uncomfortable to move. The jacket, that was produced by modifying these problem areas and developing research pattern, showed a good results on the appearances and function.