• 한국정밀공학회지
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• 제12권3호
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• pp.110-118
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• 1995

The filling phase analysis of the injection molding process for thermoplastics was applied to predict pressure, themperature and shear stress in the test mold, and the results were compared with the experiment using 30% glass fiber added ABS resin. The finite difference method was used in the analysis considering the effects of heat transfer between molten polymer and mold wall, and also frictional heating by shear flow. The analysis results were considered as a method to improve the quality and the productivity of injection molding process. Using the analysis results, the molding factors such as mold-ability of polymers, performance of injection molding machine, positioning of gate and dimendsioning of runner in the injection molding process can be estimated at the design stage of mold for good quality and productivity.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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• pp.60-64
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• 1995

The conventional neural network models are a parody of biological neural structures, and have very slow learning. In order to emulate some dynamic functions, such as learning and adaption, and to better reflect the dynamics of biological neurons, M.M. Gupta and D.H. Rao have developed a 'dynamic neural model'(DNU). Proposed neural unit model is to introduce some dynamics to the neuron transfer function, such that the neuron activity depends on internal states. Integrating an dynamic elementry processor within the neuron allows the neuron to act dynamic response Numerical examples are presented for a model system. Those case studies showed that the proposed DNU is so useful in practical sense.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 C
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• pp.1142-1144
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• 1999

A 4-beam cross type silicon elastic body was fabricated for the electromagnetic type vibration micro transducer. To improve energy transfer efficiency, the structure and size of vibration transducer were optimized by the FEA simulation package. Experimental results of the fabricated transducer shows $0.5{\sim}8$ dyne of vibration force at the condition of $1{\sim}4$ mA of current source $100{\sim}7000$ Hz of frequency band width. These results presented the useful applications for micro actuators and sensors.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.322-325
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• 1997

Concerns for wind energy as alternative energy have been highly increased. In this paper, the mechanism between mechanical wind turbine and power generating system is presented to specify the relationship of the energy transfer. Grid-connected DFIG could achieve unity leading power factor, in addition to variable speed operation at the wide sub-synchronous and super-synchronous shaft speed range and also its independent control of torque and reactive power is possible.

• 한국문헌정보학회지
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• 제21권
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• pp.191-223
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• 1991

Needs of our society for information professional have been changed continuously. The purpose of this paper is to study a direction of Library and information Science(LIS) education which can response properly the change. For this purpose, 1) the characteristics of information socitey, the demand to information profession, and the qualification required by the emerging job market of information professionals are examined. 2) the identity of LIS and its educational achievement for information professionals are considered. 3) Information Resources Management (IRM) which in some sense shares the common goal of effective information transfer with LIS is also considered. 4) the similarities and the differences between the two are discussed to seek their interrelationship and cooperation possibiity. While there are differences in focus and practice between LIS and IRM, interdisciplinary partnership between these two can enhance theory and practice of each other's area. Particulary, LIS school can take advantage for their students to penetrate the emerging job market as well-rounded information professionals.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
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• pp.481-485
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• 1987

The fabrication of a micro mass flow sensor on a silicon chip by means of micro-machining technology is described on this paper. The operation of micro mass flow sensor is based on the heat transfer from a heated chip to a fluid. The temperature differences on the chip is a measure for the flow velocity in a plane parallel with the chip surface. An anisotropic etching technigue was used for the formation of the V-type groove in this fabrication. The micro mass flow sensor is made up of two main parts ; A thin glass plate embodying the connecting parts and mass flow sensor parts in silicon chip. This sensor have a very small size and a neglible dead space. Micro mass flow sensor can fabricate on silicon chip by micro machining technology too.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 A
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• pp.344-346
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• 1995

In this paper a drive strategy of AC Servo Motor using Fuzzy method was proposed. Since the transfer function of the plant is nonlinear and very complicated, there are difficultly in driving the system with real time. The performance of out method is confirmed by computer simulation and experimental results. The high performance and high accuracy of the driving system. Fuzzy is designed and proposed.

• 기본간호학회지
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• 제14권3호
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• pp.361-370
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• 2007

Purpose: With the increasing opportunities for students to transfer into nursing from other departments or after graduation, it is important to examine how these students adapt to clinical work in the hospital setting after graduation. This study was done to describe the adaptation experience of older graduate nurses in hospital settings and to understand the meanings and search the nature of their experience. Method: For this study, the participants were 6 nurses who entered nursing after having graduated from college or university in another field. The data were collected through in-depth interviews from March to April 2007 and analyzed by Colaizzi's phenomenological method. Results: The essential themes of the adaptation experience for older graduate nurses were the following 6 categories: taking responsibilities for the expected role according to one's age, following the rules of senior-junior hierarchy, being ambivalent about one's older age, expanding one's support system, getting rid of the concept of age difference and establishing the expected position appropriate for one's career. Conclusion: For older graduate nurses, interpersonal relationship factors were more important than work related factors. Therefore, it is important to create a more flexible nursing culture to ease the adaptation of these older graduate nurses.

• 전자공학회논문지S
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• 제36S권2호
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• pp.38-45
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• 1999

본 논문에서는, $H_{\infty}-LTR$ 설계의 새로운 접근방법을 제시한다. 제시된 방법은 제어입력의 크기 및 회복오차의 적절한 가중을 조절할 수 있는 설계도구를 제공한다. 1단계에서, 요구되는 성능사양에 만족하도록 루프를 정형하기 위하여 Kalman 필터를 설계하고, 설계된 Kalman 필터는 플랜트의 전달함수와 함께 목표전달함수(target transfor function)로 사용된다. 2단계에서는 목표전달함수로 회복을 위하여 감도함수를 가중함수로 상요한 준 최적 $H_{\infty}_LTR$을 설계한다. 시뮬레이션을 통하여 LQG/LTR, $H_{\infty}-LTR$ 방법의 경과를 비교함으로써 제시된 $H_{\}-LTR$의 우수성을 보인다.

• 한국작물학회지
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• 제27권3호
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• pp.243-246
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• 1982

연맥의 2배체가 가지고 있는 유용한 유전자를 재배종인 6배체에 도입시키는 이론적인 구상을 이미 알려진 사실에 기초하여 논의하였으며 이 계획의 주요 요점은 (1) 서로 다른 배수 수준 사이의 교량 역할을 하는 이질6배체를 얻기 위하여 4배체인 Avena magna를 이용하는 것이다. 이 A. magna는 6배체 재배종인 A. sativa와는 2개의 게놈이 부분적으로 상동성을 가지거나 또는 하나는 공통적이고 나머지 하나는 부분적으로 공통성을 가지고 있기 때문에 AA BB 게놈 형태보다는 이들 사이에 보다 정상적인 접합이 이루어질 수 있기 때문이다. A. strigosa와 A. magna는 교배친화성이며 42% 이상의 임실율을 보이고 있다. (2) A. strigosa의 목적하는 유전자가 A. magna에 도입되어 있는 4배체를 선발하고 (3) 합성 5배체는 $2^n=21$인 모배우자를 생성함으로써 A. sativa와 완전 또는 거의 완전한 접합이 이루어지게 된다. (4) 결과적으로는 마지막 단계에서 $A^{As}$ 게놈에 대하여 이질성이지만 이것을 자식시키면 동질계통을 얻을 수 있게 된다.