• 제목/요약/키워드: Two-way feedback

검색결과 101건 처리시간 0.03초

디지털콘텐츠산업 활성화를 위한 국가적 통합협력 시스템 (A National Integrated Cooperation System for Invigorating the Digital Content Industry)

  • 김선배
    • 디지털융복합연구
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    • 제6권3호
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    • pp.45-52
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    • 2008
  • For the domestic digital contents, it is particularly important that the planning and mediating functions should cover the whole Industries so that dividends and assistance to reach all the way back to the primary contents-creating level, where economic risks are especially high. A proactive cooperation system or framework between the government, the businesses and research institutions, which would allow for free flow of interaction among these players, can play that role. We can broadly define cooperation frameworks into two; one between the central and the local governments and another among private-sector groups, such as companies, associations and groups. These players in the framework have differing, sometimes, conflicting views regarding the digital contents industry whether the digital contents should aim for skilled applicability or the abstract or whether the emphasis should rest on public interest or profitability. Immature competition and lack of trust among these players also give rise to such inefficiencies as overlap in investments, inexpertness and inefficient use of resources. We have proposed and realized the National Integrated Cooperation System to bridge these gaps among the major players in the industry. The National Integrated Cooperation System rests on the following major functions. The first major function of the NICS is to decipher any ambiguity that may be embedded in external Inputs by stratified role and bias. The second function is to create cooperative groups that will deal with the ambiguities based on its consequent situation. The third is a feedback function that will draw out a new cooperative way by re-feeding the capacities and the conflicts that stem from the existing organizations and strategies into cooperation and adjustment process. Our NICS has compared and evaluated with England and Australia digital content industry models under AHP(Analytic Hierarchy Process) method. NICS has turned out to be well designed and have strong points based on OECD innovation and cooperation criteria.

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엑셀 환경에서 대수 문장제 해결 경험을 통한 학생들의 문자 인식과 문자식 표현에 관한 연구 (A Study on Students' Understanding of Letters and Algebraic Expressions in Solving Algebraic Word Problems with Excel)

  • 류희찬;김현주
    • 대한수학교육학회지:학교수학
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    • 제6권4호
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    • pp.411-433
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    • 2004
  • 7학년 학생들이 문자 사용과 대수식 표현에 심각한 어려움을 갖는다고 많은 연구자들이 보고하고 있다. 이에 븐 연구는 엑셀이 학생들의 문자 인식과 대수식 표현에 어떻게 기여하는지 살펴보았다. 2주간에 걸쳐 6시간 동안 4명의 7학년 학생들은 방과후에 다양한 엑셀 활동을 경험하였고 실험 전후에 그들의 이해를 확인하기 위한 면담이 이루어졌다. 학생들의 엑셀 활동과 면담을 분석하여 얻은 결과는 다음과 같다 첫째, 실험 후에 학생들은 식을 표현하기 위해 다양한 문자들을 사용하고, 문자가 어떤 대상뿐 아니라 변하는 대상을 나타냄을 인식하였다. 또한 그들은 같은 대상을 다른 문자로 나타낼 수 있고 다른 대상을 같은 문자로 나타낼 수 있음을 받아들였다. 둘째, 엑셀은 문제에 있는 변수와 불변량을 구분하고 변수들 사이의 수학적 관계를 찾는 학생들의 능력이 향상되었다. 그리고, 엑셀 환경에서 학생들은 전체적인 계산 절차를 좀 더 쉽게 다루기 위해서 여러 개의 단계로 나눌 수 있었다. 또한 엑셀은 즉각적인 산술 피드백을 제공하고, 학생들이 지필 환경에서보다 좀 더 형식적인 방법으로 계산을 표현하도록 하였다.

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기본 인명구조술 교육을 위한 CAI 코스웨어 개발 - 성인의 이물질에 의한 기도폐쇄를 중심으로 - (The development of CAl Courseware for Basic Life Support - Centered on the Foreign-Body Airway Obstruction in Adult-)

  • 김미선
    • 한국응급구조학회지
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    • 제7권1호
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    • pp.109-118
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    • 2003
  • With the rapid development of information and communication technology, a lot of multi-media learning programs are being developed and reported in the field of Emergency medicine both home and abroad. In this connection, this study was aimed at developing a foreign-body airway obstruction courseware in adults for EMT. The development period of CAI courseware lasted from May 2003 through November 2003. Among CAI courseware patterns, private instruction and repeat practice and simulation patterns were used as an instruction-learning strategy. The learning contents of the CAI courseware consisted of five chapters concerning (1) A relief of partial FBAO in the responsible victim, (2) A relief of complete FBAO in the responsible victim, (3) In case of unconsciousness in the responsible victim without removing all foreign body, (4) In case of consciousness in all victims after getting removed all foreign body and (5) A complete airway obstruction in victims without consciousness on the basis of assess responsiveness and the degree of airway obstruction. The way to use this courseware, with just a click on one specific chapter, was developed to proceed a course with progressive algorithm, a method of solving problems by choosing one between two situations. A characteristic of this CAI courseware is the enhanced efficiency of an instruction-learning method by providing an opportunity of choice based on situations in its effort to encourage learners to use a self-initiated learning method, not one-way method and to enhance problem solving skills among situations. Moreover, this courseware went through the diverse phases such as development, application, feedback in connection with learning process by practicing teachers, so that the courseware could be used frequently in the future. The contents of this courseware were written with the web, so that, if necessary, the contents could be continuously modified and complemented and handed out in the form of CD-ROM. This study indicates that the development of a variety of CAI courseware requires institutional and financial assistance and initiatives reflecting a reality in terms of learning process, technical assistance and resources.

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디지털콘텐츠산업 활성화를 위한 국가적 통합협력 시스템 (A National Integrated Cooperation System for Invigorating the Digital Content Industry)

  • 김선배;장영철;이창훈
    • 한국디지털정책학회:학술대회논문집
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    • 한국디지털정책학회 2006년도 춘계학술대회
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    • pp.379-390
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    • 2006
  • For the domestic digital contents, it is particularly important that the planning and mediating functions should cover the whole industries so that in order for dividends and assistance to reach all the way back to the primary contents-creating level, where economic risks are especially high. A proactive cooperation system or framework between the government, the businesses and research institutions, which would allow for free flow of interaction among these players, can play that role. We can broadly define cooperation frameworks into two; one between the central and the local governments and one among private-sector groups, such as companies, associations and groups. These player sin the framework have differing, sometimes, conflicting views regarding the digital contents industry whether the digital contents should aim for skilled applicability or the abstract or whether the emphasis should rest on public interest or profitability. Immature competition and lack of trust among these players also give rise to such inefficiencies as overlap in investments, inexpertness and inefficient use of resources. We have proposed and realized the National Integrated Cooperation System to bridge these gaps among the major players in the industry. The National Integrated Cooperation System rests on the following major functions. The first major function of the NICS is to decipher any ambiguity that may be embedded in external inputs by stratified role and bias. The second function is to create cooperative groups that will deal with the ambiguities based on its consequent situation. The third is a feedback function that will draw out a new cooperative way by re-feeding the capacities and the conflicts that stem from the existing organizations and strategies into cooperation and adjustment process. Our NICS has compared and evaluated with England and Australia digital content industry models under AHP(Analytic Hierarchy Process) method. NICS has turned out to be well designed and have strong points based on OECD innovation and cooperation criteria.

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Neuroendocrine Control of Gonadotropin Secretion during the Menstrual Cycle

  • Ryu, Kyung-Za
    • 대한약리학회지
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    • 제23권2호
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    • pp.57-75
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    • 1987
  • Two modalities of gonadotropin secretion, pulsatile gonadotropin and preovulatory gonadotropin surge, have been identified in the mammals. Pulsatile gonadotropin secretion is modulated by the pulsatile pattern of GnRH release and complex ovarian steroid feedback actions. The neural mechansim that regulates the pulsatile release of GnRH in the hypothalamus is called "GnRH pulse generator". Ovarian steroids, estradiol and progesterone, appear to exert thier feedback effects both directly on the pituitary to modulate gonadotropin release and on a hypothalamic site to modulate GnRH release; estradiol primarily affects the amplitude while progesterone decreases the frequency of the pulsatile GnRH. Steroid hormones are known to affect catecholamine transmission in brain. MBH-POA is richly innervated by NE systems and close apposition of NE terminals and GnRH cell bodies occurs in the MBH as well as in the POA. NE normally facilitates pulsatile LH release by acting through ${\alpha}-receptor$ mechanism. However, precise nature of facilitative role of NE transmission in maintaining pulsatile LH has not been clearly understood. Close apposition of DA and GnRH terminals in ME might permit DA to influence GnRH release. Action of DA transmission probably is mediated by axo-axonic contacts between GnRH and DA fibers in the ME. Dopamine transmission does not normally regulate pulsatile LH release, but under certain conditions, increased DA transmission inhibit LH pulse. Endogenous opioid acts to suppress the secretion of GnRH into hypophysial portal circulation, thereby inhibiting gonadotropin secretion. However, an interaction between endogenenous opioid peptides and gonadotropin release is a complex one which involves ovarian hormones as well. LH secretion appears to be most suppressed by endogenenous opioids during the luteal phase, at a time of elevated progesterone secretion. The arcuate nucleus contains not only cell bodies for GnRH and ${\beta}-endorphin$ but also a dense aborization of fibers suggesting that GnRH release is changed by the interactions between GnRH and ${\beta}-endorphin$ cell bodies within the arcuate nucleus. The frequency and amplitude of pulsatile LH release seem to be increased during the preovulatory gonadotropin surge. Estradiol exerts positive feedback action on the hypothalamo-pituitary axis to trigger preovulatory LH surge. GnRH is also crucial hormonal stimulus for preovulatory LH surge. It is unlikely, however, that increased secretion of GnRH during the preovulatory gonadotropin surge represents an obligatory neural signal for generation of the LH discharge in primates including human. Modulation of preovulatory LH surge by catecholamines has been studied almost exclusively in rats. NE and E may be involved in distinct way to accumulate GnRH in the MBH and its release into the hypophysial portal system during the critical period for LH surge on proestrus in rats. However, the mechanisms whereby augmented adrenergic transmission may facilitate the formation and accumulation of GnRH in the ME-ARC nerve terminals before the LH surge have not been clearly understood.

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인터넷 패션쇼핑몰의 이메일 마케팅 활용과 반응 - 패션 전문몰을 중심으로 - (A Study on E-mail Campaigns and Feedback Analysis as Marketing Tools of Internet Fashion Shopping Malls - With Focus on Specialized Fashion Shopping Malls -)

  • 한지숙
    • 디자인학연구
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    • 제19권2호
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    • pp.53-62
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    • 2006
  • 빠른 '통신수단 '정도로만 여겨왔던 이메일이 온라인 마케팅의 핵심으로 떠오르고 있다. 이로 인해 기업들은 고객과의 Communication을 통해 지속적인 고객관리를 해야 하는 시점에서 이메일 마케팅은 강력한 의사교환 수단이며 고객의 성향과 구매습관, 취향 등을 분석하여 개인화된 일대일(One To One) 마케팅1)을 가능케 해준다. 정확한 타겟팅이 무엇보다 중요한 패션 산업에 있어서 일대일 마케팅 도구로서 또는 고객과의 커뮤니케이션 할 수 있는 가장 효과적인 방법으로서 이메일 마케팅은 매우 중요한 전략중 하나이다. 이에 본 연구에서는 일대일(One To One) 마케팅 도구로 부각되고 있는 이메일을 대상으로 인터넷 패션쇼핑몰에서 2005년 6월 12일부터 7월 30일까지 발송한 이메일을 대상으로 실제 사례분석을 통해 이메일 발송 후 매출 신장 효과를 살펴보고 이메일 반응에 미치는 영향을 오픈율을 기준으로 세부 반응을 분석하였다. 연령대별, 성별 오픈율은 20대 후반 여성이 평균 21.66%로 가장 높게 나타났고, 평균 3.5%의 매출 신장 효과가 있었다. 매출 현황에서도 20대 후반의 매출액이 28.10%로 가장 높게 나타나 오픈율이 많은 그룹에서 매출도 많이 일어나는 것을 알 수 있었다. 이메일 제목에 따른 반응은 [케주얼] 이라는 상품 카테고리를 표시한 이메일 제목이 가장 높게 나타났고, 요일에 따른 반응은 화요일 발송 메일이 가장 높게 나타났다. 정기 메일과 섹션 메일의 연관성은 섹션 메일에서 오픈율이 더 높게 나타났고, 시간대별 오픈율은 14시(오후2시)에 20대 후반 여성에게 발송한 메일의 오픈율이 20.93%로 가장 높게 나타났다. 실용적 정보와 흥미로운 요소들로 수신자들의 관심을 끌어 사이트의 방문을 유도하는 형태로 가는 것이 바람직하다고 볼 수 있다. 결론적으로, 이메일 발송이 매출 신장에 효과적인 수단임을 알 수 있었다. 또한, 효과를 더욱 높이기 위해서는 기존 메일 발송 결과를 분석한 데이터를 차기 메일 발송에 꾸준히 적용함으로써 성공적인 이메일 마케팅 결과를 얻을 수 있을 것으로 기대된다.

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능동 슬라이딩 모드 제어기를 이용한 변형된 Lorenz 카오스 동기화 (Modified Lorenz Chaos Synchronization Via Active Sliding Mode Controller)

  • 류기탁;이윤형
    • 한국산학기술학회논문지
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    • 제19권7호
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    • pp.16-23
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    • 2018
  • 카오스는 비선형 과학 분야에서 매우 중요한 주제 중의 하나이며, Lorenz가 처음으로 소개한 이후 집중적으로 연구되어지고 있다. 카오스 시스템의 한 특성은 카오스 시스템에 의해 생성된 신호는 다른 어떤 시스템과 동기화되지 않는다는 것이다. 따라서 두 카오스 시스템은 서로 동기화되는 것이 불가능한 것처럼 보이지만, 만약 두 시스템이 적절한 방법으로 정보를 교환한다면 이 두 시스템은 동기화가 가능하다. 본 논문에서는 능동 제어와 슬라이딩 모드 제어, 그리고 리아프노프 안정도 이론을 기반으로 하는 변형된 Lorenz 카오스 시스템의 동기화 문제에 대해 다룬다. 동기화를 위해 고려한 기법은 선형상태 오차 변수에 의해 짝을 이룬 구동시스템과 응답시스템으로 구성된다. 이를 위해 우선 대상 카오스 시스템에 대해 간단히 살펴본다. 다음으로 능동제어, 슬라이딩 모드 제어 기법을 이용한 카오스 시스템의 동기화와 채터링 문제를 해결하기 위한 제어 방법을 도출한다. 전체 폐루프 시스템의 점근적 안정도는 리아프노프 안정도 이론에 의해 증명한다. 컴퓨터 시뮬레이션은 제안한 방법의 타당성을 확인하기 위해 그래픽으로 제시한다.

근전도 바이오피드백을 이용한 숏 풋 운동이 정적으로 선 자세 동안 발의 안쪽 세로활 유지에 미치는 영향 (Effect of the Short foot Exercise Using an Electromyography Biofeedback on Medial Longitudinal Arch During Static Standing Position)

  • 차상민;강민혁;문동철;오재섭
    • 한국전문물리치료학회지
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    • 제24권1호
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    • pp.9-18
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    • 2017
  • Background: Short foot exercise (SFex) is often prescribed and performed in the sport and rehabilitation fields to strengthen intrinsic foot muscles. However, SFex is difficult to perform because of lack of feedback methods. Objects: The aim of this study was to compare the effects of SFex with and without electromyography (EMG) biofeedback on the medial longitudinal arch (MLA) of healthy individuals who maintained a static standing position. Methods: All participants (14 males and 12 females) were randomly divided into two groups (biofeedback and non-biofeedback groups). The EMG activity of the abductor hallucis (AbdH) and tibialis anterior (TA) and the MLA angle on the dominant leg side were measured with the participant in the standing position in the pre- and post-intervention conditions. The intervention session consisted of 15 minutes of SFex with (biofeedback group) or without (non-biofeedback group) EMG biofeedback. The groups were compared using two-way repeated measures analysis of variance. Results: The post-intervention activities of the AbdH muscle (p<.05) and the AbdH/TA ratio (p<.05) were significantly greater in the biofeedback group than in the non-biofeedback group. The activity of the TA (p<.05) and the MLA angle (p<.05) in the biofeedback group were significantly lower in the post-intervention condition than in the pre-intervention condition. Conclusion: The present findings demonstrate that the combination of SFex and EMG biofeedback can effectively facilitate the muscle activity of the AbdH and strengthen the medial longitudinal arch.

과학동산 운영에 관한 질적 연구 (A Qualitative Study of Running질 Science Garden질)

  • 채동현;이수영
    • 한국초등과학교육학회지:초등과학교육
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    • 제21권2호
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    • pp.263-288
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    • 2002
  • 'Science Garden' is a science program that develops acquirements of science & technology at an early stage through experiential study and inspire the spirit of scientific inquiry by carrying out laboratory work, science movie, science lecture, scientific work, outdoor activities, computer classes and science experiment which is hard to do through the regular educational course. It is targeted grade 4,5,6 students during summer and winter vacation. 'Science Garden' is conducted by selective participation freely. It is a wholelistic activity that develops children's potential talents or creativities, improves interest and attitude toward science, and also gives opportunity for self-realization by extending capacity for inquiry to show each student's ability. This study is observed and is compared how it is conducted in elementary school using qualitative study. This study is used narrative observation, in-depth interview and document analysis. Objects of narrative observation are two elementary schools, each from Jellabukdo and Gyeonggido, and 7 teachers were interviewed in-depthly. Here are results of the study. 1 A teacher in school G never takes part in student activities, tends to be indifferent to classes, but focuses on observation and experiment in laboratory. And feedback or evaluation about student's activity is never done. On the other hand, a teacher in school S guides students to understand the principals of science on themselves, and wide variety forms of activities such as role playing, discussion, and games are being done. But an effort to evaluate student's activity is not being made properly. 2. Teachers set a high valuation on the need of 'Science Garden'. Observing the way of conducting 'Science Garden', usually teachers who is in charge of science for official work is selected as a teacher in charge, and groan under a heavy burden of conducting it without anyone's help. Participating students are selected by volunteering or teacher's recommendation, but because of low Participation rate, teachers have difficulty in conducting it. Plan for conducting ‘science Garden’ is made 20 days before it, after getting an official document from Office of Education, refering to booklets produced by National Jungang Science Institute, or data from Office of Education, and internet. Teachers evaluate rarely Most school principals have interest in 'Science Garden' but parents are not well aware of it, The budget is made at the same time with the plan, and scale is varied between 200,000∼500,000 won. Because of the improper way of selecting teacher in charge, difficulty in selecting students, heavy works caused by planning, conducting the program, as well as reporting teacher's work, and lack of parents' awareness, 'Science Garden' has been conducted formally and superficially. Next gives you direction to change, for the right way of conducting' Science Garden'. It is important to motivate competent teachers to instruct students actively. For students' active participation, They should publicize thoroughly beforehand, and develope 'Science Garden' program for teachers to be able to make better use of it. Evaluation of student activities and program should be done in the aspect of developing students’ faculties. Beside of school facilities, they need to put diverse local facilities and places to practical use for immediate natural experience. And not only separate schools but also associated form of schools to conduct it is necessary.

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동적 경로안내전략수행을 위한 다계층 통행배정모형의 개발 (Development of Multiclass Assignment For Dynamic Route Guidance Strategy)

  • 이준;임강원;이영인;임용택
    • 대한교통학회지
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    • 제22권7호
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    • pp.91-98
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    • 2004
  • 본 연구는 통행자들을 실시간 교통정보의 유무외에 제공받는 교통정보의 내용에 따라서 구분한 다계층 통행배정모형을 정립하고자 한다. 이를 통해 네트워크 및 수요변화에 대응할 수 있는 우수한 교통정보제공전략인 분산환류전략(Decentralized Feedback Strategy ; DFS)의 핵심사항인 분산계수결정모형을 제시하고 ITS의 중요한 기술적 요소들(VMS위치, 정보제공주기, 정보제공영역 등)에 대한 판단기준을 정립하고자 한다. 이를 위하여 연동적 시간대 분석기법 (Rolling Horizon implementation ; RHI)을 활용한 다계층 동적통행배정모형을 개발하고 차량내탑재장치를 활용한 주행중 정보제공전략으로서 분산환류전략(DFS)의 적용성 및 효과성을 평가하고자 하였다. 본 연구에서는 차량내 탑재장치를 중심으로 교통정보를 제공받는 집단에 대해서 분석을 수행하였다. 이때 정보의 내용에 따라 동적 최단경로안내를 받는 그룹과 DFS에 의한 경로정보를 안내받는 그룹으로 나누어 다계층 동적통행배정 모형을 구성하였다. DFS의 적용을 위하여 정보대상노드에서 목적지까지 경로를 모두 탐색한 뒤 이들 경로에 대한 통행시간정보를 이용하여 통행자들의 인지통행비용이 같아지도록 교통류 분산계수를 설정하였다. 또한 이러한 분산계수가 적용되는 통행자를 구별하기 위하여 연동적 시간대분석기법(Rolling Horizon Imlementation)을 활용하여 동적통행배정을 수행하였다. 분석결과 유고상황시 DFS의 네트워크 총통행시간 개선효과를 확인할 수 있었다.