• 제목/요약/키워드: better-for-you

검색결과 525건 처리시간 0.041초

A Self-Tuning Fuzzy Controller for Torque and RPM Control of a Vehicle Engine

  • Seon, Kwon-Seok;Na, Seung-You
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 1995년도 추계학술대회 학술발표 논문집
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    • pp.25-28
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    • 1995
  • A Practical application of self-tuning fuzzy controller to a multi-input multi-output complex system of a vehicle engine is investigated. The ovjective is to design a controller to improve the transient performance in torque and RPM mode changes. For the performance improvement in the multivariable comples system, the self-tuning function of internal parameters is essential and practical. The measured output variables using different control schemes are compared the advanteges of the self-tuning fuzzy logic controller are better output performances and the effectiveness in the controller design using many parameters.

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EDS 알고리즘을 이용한 적응형 빔형성 안테나 설계 (Design of Adaptive Beamforming Antenna using EDS Algorithm)

  • 김성훈;오정근;유관호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 심포지엄 논문집 정보 및 제어부문
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    • pp.56-58
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    • 2004
  • In this paper, we propose an adaptive beamforming algorithm for array antenna. The proposed beamforming algorithm is based on EDS (Euclidean Direction Search) algorithm. Generally LMS algorithm has a much slower rate of convergence, but its low computational complexity and robustness make it a representative method of adaptive beamforming. Although the RLS algorithm is known for its fast convergence to the optimal Wiener solution, it still suffers from high computational complexity and poor performance. The proposed EDS algorithm has a rapid convergence better than LMS algorithm, and has a computational more simple complexity than RLS algorithm. In this paper we compared the efficiency of the EDS algorithm with a standard LMS algorithm.

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흡입용 PEMWE형 수소 발생기에서 증류수 공급 방법이 성능에 미치는 영향 (Effect of Distilled Water Supply Method on Performance of PEMWE Typed Hydrogen Generators for Inhalation)

  • 유인수;배현우;김준현;성재용
    • 한국가시화정보학회지
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    • 제20권3호
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    • pp.117-127
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    • 2022
  • The present study has investigated the performance of hydrogen gas generators for inhalation purposes based on polyelectrolyte membrane water electrolysis (PEMWE). The system applied two watering methods. One is pumped water (pumping system) and the other is gravity-fed water without a pump (non-pumping system). The cell efficiencies were compared by measuring the cell voltage and temperature in the hydrogen gas generator, respectively. The results show that the cell voltage and temperature increase with the cell current. The cell temperature is lower in the pumping system than that in the non-pumping system at a given cell current. Even though the amount of hydrogen production is the same regardless of the pumping system, the cell efficiency of the hydrogen gas generator in the non-pumping system is better than that in the pumping system.

압축전담 교량 내진보강공법 개발 연구 (Development of Compression-Only Bridge Seismic Reinforcement Method)

  • 장유식;윤원섭;유광호
    • 한국산업융합학회 논문집
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    • 제25권6_3호
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    • pp.1221-1230
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    • 2022
  • In this study, a seismic reinforcement method was studied to improve the seismic performance of aged bridges. The construction method developed in this study is a compression-only bridge seismic reinforcement method, and has excellent economic feasibility and workability compared to existing construction methods. In the case of aged bridges, there was an advantage that could compensate for the disadvantages that it was difficult to apply the existing reinforcement method. For the newly developed method, the effect of reinforcement was analyzed through resin analysis. As a result of the analysis, when the reinforcement was applied, the axial reinforcement effect was excellent, and the field applicability was excellent as it showed better results than the existing seismic isolation backing method.

프랜차이즈 매장 품질요인의 속성분류: 국내 외식업을 중심으로 (Categorizing Quality Features of Franchisees: In the case of Korean Food Service Industry)

  • 변숙은;조은성
    • 한국유통학회지:유통연구
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    • 제16권1호
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    • pp.95-115
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    • 2011
  • 본 연구는 Kano모델을 활용하여 프랜차이즈 매장에 관한 다양한 품질요인들의 속성을 고객의 관점에서 분류하였다. 또한, 각 품질요인들이 고객의 만족 또는 불만족에 미치는 상대적 영향력을 분석해 보고자 만족지수와 불만족지수를 산출하였다. 자료 수집을 위해 외식 프랜차이즈 매장 방문 경험이 있는 서울 및 전국광역시 거주 성인들을 대상으로 온라인조사를 실시하였으며, 총 257개의 응답이 분석에 사용되었다. 분석 결과, 해당 품질요소가 충족이 되지 않는 경우 소비자의 불만으로 이어지는 요소에는 매장 청결도, 직원 친절도 및 숙련도, 편의시설 제공 등이 포함되는 것으로 나타났다. 프랜차이즈 사업에서 매장 간 음식메뉴의 구색, 가격, 품질수준, 인테리어, 고객서비스 절차 등의 표준화는 중요하게 생각되어 왔으나, 이 중 음식 가격의 동일성만이 고객의 불만족과 깊은 관계를 가지고 있었다. 충족이 되지 않아도 상관없지만 충족이 되는 경우 고객들의 호의적인 반응을 이끌어낼 수 있는 요소로는 외부기관으로부터의 수상 또는 인증 경력, 프랜차이즈 브랜드의 해외진출, 경품이벤트 및 사용금액에 따라 혜택을 주는 로열티 프로그램의 실시, 그리고 우수한 매장접근성이 해당되었다. 프랜차이즈 브랜드를 상대적으로 자주 이용하는 헤비유저의 경우, 정기적인 신메뉴 출시 또한 매력적인 품질요인으로 생각하고 있었다. 본 논문은 경영자가 우선적으로 관심을 두고 개선하여야 하는 부분과 경쟁력 확보를 위해 추가적으로 투자해야 할 부분이 어디인가에 대한 시사점을 제공해 준다는 점에서 연구의 의의가 있다.

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Why A Multimedia Approach to English Education\ulcorner

  • Keem, Sung-uk
    • 대한음성학회:학술대회논문집
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    • 대한음성학회 1997년도 7월 학술대회지
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    • pp.176-178
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    • 1997
  • To make a long story short I made up my mind to experiment with a multimedia approach to my classroom presentations two years ago because my ways of giving instructions bored the pants off me as well as my students. My favorite ways used to be sometimes referred to as classical or traditional ones, heavily dependent on the three elements: teacher's mouth, books, and chalk. Some call it the 'MBC method'. To top it off, I tried audio-visuals such as tape recorders, cassette players, VTR, pictures, and you name it, that could help improve my teaching method. And yet I have been unhappy about the results by a trial and error approach. I was determined to look for a better way that would ensure my satisfaction in the first place. What really turned me on was a multimedia CD ROM title, ELLIS (English Language Learning Instructional Systems) developed by Dr. Frank Otto. This is an integrated system of learning English based on advanced computer technology. Inspired by the utility and potential of such a multimedia system for regular classroom or lab instructions, I designed a simple but practical multimedia language learning laboratory in 1994 for the first time in Korea(perhaps for the first time in the world). It was high time that the conventional type of language laboratory(audio-passive) at Hahnnam be replaced because of wear and tear. Prior to this development, in 1991, I put a first CALL(Computer Assisted Language Learning) laboratory equipped with 35 personal computers(286), where students were encouraged to practise English typing, word processing and study English grammar, English vocabulary, and English composition. The first multimedia language learning laboratory was composed of 1) a multimedia personal computer(486DX2 then, now 586), 2) VGA multipliers that enable simultaneous viewing of the screen at control of the instructor, 3) an amplifIer, 4) loud speakers, 5)student monitors, 6) student tables to seat three students(a monitor for two students is more realistic, though), 7) student chairs, 8) an instructor table, and 9) cables. It was augmented later with an Internet hookup. The beauty of this type of multimedia language learning laboratory is the economy of furnishing and maintaining it. There is no need of darkening the facilities, which is a must when an LCD/beam projector is preferred in the laboratory. It is headset free, which proved to make students exasperated when worn more than- twenty minutes. In the previous semester I taught three different subjects: Freshman English Lab, English Phonetics, and Listening Comprehension Intermediate. I used CD ROM titles like ELLIS, Master Pronunciation, English Tripple Play Plus, English Arcade, Living Books, Q-Steps, English Discoveries, Compton's Encyclopedia. On the other hand, I managed to put all teaching materials into PowerPoint, where letters, photo, graphic, animation, audio, and video files are orderly stored in terms of slides. It takes time for me to prepare my teaching materials via PowerPoint, but it is a wonderful tool for the sake of presentations. And it is worth trying as long as I can entertain my students in such a way. Once everything is put into the computer, I feel relaxed and a bit excited watching my students enjoy my presentations. It appears to be great fun for students because they have never experienced this type of instruction. This is how I freed myself from having to manipulate a cassette tape player, VTR, and write on the board. The student monitors in front of them seem to help them concentrate on what they see, combined with what they hear. All I have to do is to simply click a mouse to give presentations and explanations, when necessary. I use a remote mouse, which prevents me from sitting at the instructor table. Instead, I can walk around in the room and enjoy freer interactions with students. Using this instrument, I can also have my students participate in the presentation. In particular, I invite my students to manipulate the computer using the remote mouse from the student's seat not from the instructor's seat. Every student appears to be fascinated with my multimedia approach to English teaching because of its unique nature as a new teaching tool as we face the 21st century. They all agree that the multimedia way is an interesting and fascinating way of learning to satisfy their needs. Above all, it helps lighten their drudgery in the classroom. They feel other subjects taught by other teachers should be treated in the same fashion. A multimedia approach to education is impossible without the advent of hi-tech computers, of which multi functions are integrated into a unified system, i.e., a personal computer. If you have computer-phobia, make quick friends with it; the sooner, the better. It can be a wonderful assistant to you. It is the Internet that I pay close attention to in conjunction with the multimedia approach to English education. Via e-mail system, I encourage my students to write to me in English. I encourage them to enjoy chatting with people all over the world. I also encourage them to visit the sites where they offer study courses in English conversation, vocabulary, idiomatic expressions, reading, and writing. I help them search any subject they want to via World Wide Web. Some day in the near future it will be the hub of learning for everybody. It will eventually free students from books, teachers, libraries, classrooms, and boredom. I will keep exploring better ways to give satisfying instructions to my students who deserve my entertainment.

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수학교과에서 관계적 이해의 인식에 대한 실태 분석 및 수학교육의 개선 방향 탐색 (The difference in the Relational understanding of the mathematics curriculum and the search for a better direction in mathematics education.)

  • 류근행
    • 한국학교수학회논문집
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    • 제6권1호
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    • pp.135-161
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    • 2003
  • 본 연구는 수학과 교수.학습에서 고등학교 학생들의 이해와 관련된 여러 가지 상황과 고등학교 교사들의 이해 관을 조사 분석하여 현재 수학과 교수.학습에서 문제점을 찾아보고 그 결과를 바랑으로 미래의 수학교육에서 학생들이 수학을 학습할 때 이해를 보다 잘 하도록 지도 방향을 탐색하는데 목적을 두었다. 충청남도 및 대전광역시에 있는 일부 고등학생 1107명과 고등학교 교사 105명의 응답을 분석한 결과를 연구문제 별로 다음과 같이 요약할 수 있다. 1. 응답 학생의 77%(852명)가 '관계적 이해'를 '수학학습에서의 이해'로 인식하고 있었다. 2. 수학학습에서의 이해에 대한 물음에 응답 교사의 85.7%가 '왜 그런지 기본적인 원리를 알고 있으면서 문제해결에 적용할 수 있는 경우(관계적 이해)'라고 응답하였다. 3. 학생들이 얻은 학교수학의 성취도와 모의수학능력고사 성취도 사이에 차이가 큰 이유에 대하여 학생들은 '학교수학은 유사한 문제 유형에 적용하거나 외우면 되나 모의고사는 그렇지 않아서'라고 응답하여 본 연구에서는 현재 수학과 교수.학습에서 제일 큰 문제점으로 지적된다. 4. 연구문제 1, 2, 3의 결론을 토대로 수학학습에서 학생들이 보다 더 이해를 잘 하도록 하기 위한 교수.학습은 다음에 역점을 두고 개선되어야 한다. 1) 교사는 수학과 교수.학습에서 가급적 학생들 스스로가 기본적인 원리가 왜 그런지 알뿐만 아니라 새로운 문제에 적용해 나갈 수 있도록 학습의 안내자가 되어야 한다. 2) 매시간의 학습에서 학생들이 관계적 이해를 했는지 쉽게 확인 할 수 있는 방법을 연구해야 한다. 3) 학생들의 흥미유발을 위하여 '재미있는 수업의 진행'에 보다 더 힘써야 한다. 4) 평가 방법 개선에 힘써야 한다.

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모바일 에드혹네트워크를 위한 효과적인 침입 탐지 시스템 (An Effective Intrusion Detection System for MobileAdHocNetwork)

  • ;박규진;박광채;최동유;한승조
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2008년도 춘계종합학술대회 A
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    • pp.271-276
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    • 2008
  • The intrusion detection system is one of the active fields of research in wireless networks. Intrusion detection in wireless mobile Ad hoc network is challenging because the network topologies is dynamic, lack centralization and are vulnerable to attacks. This paper is about the effective enhancement of the IDS technique that is being implemented in the mobile ad hoc network and deals with security and vulnerabilities issues which results in the better performance and detection of the intrusion.

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Sericin and 4-hexylresorcinol combination ointment accelerates wound healing in the diabetic burn wound model

  • Kang, Yei-Jin;Jo, You-Young;Kweon, HaeYong;Kim, Seong-Gon
    • International Journal of Industrial Entomology and Biomaterials
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    • 제40권1호
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    • pp.1-5
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    • 2020
  • Sericin has been used for the treatment of burn wound. The purpose of this study was to compare the wound healing between sericin plus 4-hexylresorcinol (4HR) ointment (SE+4HR) and base only ointment. Total 12 mice were included in this study. SE+4HR group showed significantly smaller wound size than base only group at 3 wk (P<0.05). Surface temperature was higher in SE+4HR group. In conclusion, SE+4HR group showed better wound healing than base only group.

밀폐된 원통내부에서 회전체의 형상에 따른 혼합효과에 대한 LDV 측정 (LDV Measurement for the Mixing Effect of the Rotator Shape in a Confined Cylinder)

  • 박천수;김유곤
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2001년도 춘계학술대회논문집E
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    • pp.720-726
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    • 2001
  • Two-dimensional, angle-resolved LDV(Laser Doppler Velocimetry) measurements of the turbulent rotating flow field in a confined cylinder have been performed. The configurations of interest are flows between a rotating upper disk with a rod attached by a disk or impeller(${\theta}= 90^{\circ},\;45^{\circ}$) and a stationary lower disk in a confined cylinder. The mean flow velocity as well as the turbulent intensity of the flow field have been measured. The results show that the flow is strongly dependent on the position of the impellers or the disk, negligibly affected by the Reynolds number in turbulent flow. It is observed that the mixing effect of the axial flow impeller(${\theta}= 45^{\circ}$) is better than that of the radial flow impeller(${\theta}= 90^{\circ}$) or a disk.

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