• Title/Summary/Keyword: microwave Oven

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Influence of asethetic attributes on user interface design (제품의 조형요소가 사용자-인터페이스 디자인에 미치는 영향에 관한 연구)

  • 이현진;이건표
    • Journal of the Ergonomics Society of Korea
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    • v.14 no.1
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    • pp.105-113
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    • 1995
  • The objective of the study is to investigate the influence of aesthetic attributes on user interface design. Theories of aesthetics are first studied from which aesthetic attributes are defined as information sources. Representation of a product is viewed as a combination of aesthetic attributes, based on a hypothesis that each attribute has a certain influence on the performance in terms of user interface. An experiment was conducted to support the hypothesis. Various combinations of aesthetic attributes of a microwave oven were generated from the orthogonal array of a conjoint analysis. Subjects perfomed on a computer two types of tasks, each of which simulated a combination of attributes. Reaction time was evaluated as a performance measure for the conjoint analysis to find out how much influence each attribute has on the performance. A computer program, UISA(User interface Simulation system of Aesthetic attributes0, was developed and used for simulation. Findings on the influences of aesthetic attributes were summarized.

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Development of Boost input type active clamp AC-DC Converter for driving magnetron (마그네트론 구동용 BOOST 입력형 능동클램프 AC-DC 컨버터의 개발에 관한 연구)

  • Kang, Kyung-Nam;Oh, Duck-Jin;Kim, Hee-Jun
    • Proceedings of the KIEE Conference
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    • 2002.04a
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    • pp.164-166
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    • 2002
  • HVT(High Voltage Transformer) has been used to drive a magnetron in a microwave oven. This has some problems which are heavy weight, low efficiency and limit of output. To overcome these problems, this paper proposes a boost input type active clamp AC-DC converter for magnetron driving featuring the high efficiency and improved EMI characteristics. To verify the validity of the proposed converter operation, the prototype converter of 700W was built and tested.

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A UBET Analysis of The Warm Forming Process of Magnetron Anode (마그네트론 양극의 온간성형 공정의 UBET해석)

  • 조관형;배원병;김영호;양동열
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.04b
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    • pp.204-208
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    • 1995
  • Copper magnetron anode of a microwave-oven consists of an cylindrical outer-tube and various inner-vanes. The magnetron anode is produced by the complex process ; vane blanking, pipe cutting and sliver-alloy brazing of vanes. Recently, the backward extrusion process for forming vanes has been developed to avoid the complex procedures. The developed process is analyzed by using upper-bound elemental technique(UBET). In the UBET analysis, the upper-bound load, the configuration and the vane-height of final extruded product are determined by minimizing the total power consumption with respect to chosen parameters. To verify theoretical analysis, experiments have been carried out with pure plasticine billets at room temperature, using different web-thickness and number of vanes. The theoretical predictions both for forming load and vane-height are in reasonable agreement with the experimental results.

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Physicochemical Properties of Cooked Rice as Affected by Cooking Methods and Thawing Conditions (취반 및 해동방법에 따른 쌀밥의 이화학적 특성)

  • Ha, Joo-Young;Lee, Jong-Mee
    • Journal of the Korean Society of Food Culture
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    • v.20 no.2
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    • pp.253-260
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    • 2005
  • This study was conducted to investigate performance of methods for cooking and thawing frozen cooked rice to retard retro-gradation of cooked rice. For this research, That was executed rice's physicochemical and sensory characteristics test through the way of boiling rice or thawing, and found out best way for retro-gradation and taste. This study showed the rice cooked by pressure rice pot has less dehydration during freezing and thawing, and thawed rice by micro wave has less dehydration. Repetition of freezing and thawing resulted increasing of hardness and chewiness, and decreasing of adhesiveness and cohesiveness. The rice cooked by convotherm oven or pressure rice pot has less increased hardness while freezing and thawing. Adhesiveness was superior when rice was cooked by pressure rice pot. The rice thawed by microwave had more hardness than thawed in room temperature.

Korean Household’s Level and Standard of Consumption: For Developing Sustainable Lifestyle (한국가계의 소비수준 및 표준:지속가능한 생활양식의 실현 모색)

  • 손상희
    • Journal of Families and Better Life
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    • v.19 no.5
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    • pp.259-277
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    • 2001
  • The purpose of this study was to identify household’s level and standard of consumption and their related variables in order to derive some useful implications for developing sustainable lifestyle. Data were collected from 567 household wives living in Seoul and the five Metropolitan cities in Korea. The results showed that most households owned such goods as central heating system, shower and bath, refrigerator, microwave oven, vacuum cleaner, washer. TV video player, personal computer, mobile phone, and car. They thought that most of the goods were necessary for the desired level of living and has a strong aspiration to buy those goods. This implied a tendency of uniformity in need perceptions and consumption patterns among Korean households. However, level and standard of consumption measured in selected living area differed according to age. education family size, household income, occupation, and the size housing, which showed that different approach was needed for developing sustainable lifestyle according to these variables.

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Electromagnetic field analysis in MWO using computational method (수치해석을 이용한 전자렌지 내의 전자계 해석)

  • Park, Kwang-Soo;Shon, Jong-Chull;Kim, Sang-Gweon;Park, Yoon-Ser
    • Proceedings of the KIEE Conference
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    • 1997.07e
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    • pp.1893-1895
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    • 1997
  • This paper presents an analysis of the electromagnetic field in the 3D microwave oven using computational method. The model is accounted the real shape, including the formings, input waveguide with the magnetron, tray, and so on. For quantisation of this problem, Galerkin method with the Nedelec's edge basic functions is used. The system of linear algebraic equations is solved by the iteration method. The simulation results were compared with the experimental results.

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Measurements of multimode characteristics including surface wave mode in a dielectrically loaded rectangular cavity (직육면체 캐비티의 다중 모드 특성및 표면파 모드 특성 측정)

  • 김채영;김윤명;라정웅
    • 전기의세계
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    • v.28 no.4
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    • pp.47-52
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    • 1979
  • Total number of resonant modes in a microwave oven cavity may be maximized for a given frequency bandwidth to obtain more uniform power distribution by choosing proper size of the cavity. The total number of modes is calculated for a dielectrically loaded rectangular cavity and its size is suggested here for which the change in the number of modes is less sensitive to the change of dielectric layer thickness and its total number of modes is maximized in a given range of cavity sizes. A prove coupled rectangular cavity is constructed and the total existing modes are measured to see the change of modes depending on the dielectric layer thickness and the cavity size. Surface wave mode existing in the dielectric layer is confirmed by measuring Q and the input impedance of the cavity for this mode, which closely compares with the calculation.

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Numerical and experimental analysis of the electromagnetic field of the load in a microwave oven (전자레인지 내부에 위치한 부하의 전자파 패턴에 관한 실험 및 수치해석)

  • Cho, Seong-Ho;Lee, Young-Min;Kim, Hyun-Jung
    • Proceedings of the KIEE Conference
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    • 2000.07c
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    • pp.2174-2176
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    • 2000
  • FDTD(Finite Difference Time Domain) 방법을 적용하여 마이크로웨이브 오븐 내부의 전자기장을 해석하였고, 적외선사진을 통하여 실험과 비교 검증하였다. 부하의 종류와 형태에 따른 전자기장의 패턴 변화를 고찰하였고, 여러 가지 포밍형태와 오프닝 형태에 따른 전자기장의 패턴을 적외선 사진과 비교하였다. 표면 보정 기법을 적용하여 부하표면에서의 전자파 패턴을 보다 정확히 예측할 수 있었으며, 또한 마그네트론의 공진 주파수에 따른 전자파 파워 패턴의 변화를 살펴 보았다. 이와 같이 개발된 마이크로 웨이브 오븐 내부의 전자파 해석 프로그램을 이용하면, 균일 가열 성능 향상을 위한 마이크로웨이브 오븐의 캐비티 설계 기간을 크게 단축할 수 있을 것으로 생각된다.

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Boost Input type High Power Factor Resonant Power Supply for driving Magnetron Device (마그네트론 구동용 고역률 부스트 입력 방식의 공진형 전원장치)

  • Jeong, Jin-Beom;Yeon, Jae-Eui;Kim, Hee-Jun
    • Proceedings of the KIEE Conference
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    • 2003.07b
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    • pp.1078-1080
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    • 2003
  • This paper proposes the boost input type resonant power supply for driving the magnetron device of the high-capacity microwave oven. Circuit topology of the proposed power supply is the boost input type resonant converter which uses the resonance between transformer leakage inductance and resonance capacitance. Proposed power supply obtains high power factor more than 98% through continuous current mode pulse width modulation. To verify the validity of the proposed power supply, operation principle in the steady state is analyzed and experimental results are presented.

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Fabrication and Characteristics of Multi-functional Sensor System (다기능 센서 시스템의 제작 및 동작 특성)

  • Jung, Jae-Eop;Lee, Hyo-Ung;Lee, Sung-Pil
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.11a
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    • pp.368-371
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    • 2003
  • The humidity sensors with a stable characteristics and gas sensors operating at room temperature have been fabricated, and a multi-functional sensor system which has gas sensor, humidity sensor, temperature sensor and control circuit has been applied to the microwave oven system. For a suitable cooking state, the humidity sensors was more applicable to heating and defrosting condition than gas sensors, however, the dynamic characteristics of gas sensors were obtained in the easy burning food such as pop corn.

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