• 제목/요약/키워드: helix

검색결과 984건 처리시간 0.025초

Network Arrangements Underlying Strategic Corporate Social Responsibility: Findings from Globalized Cyberspace and Lessons for Asian Regions

  • Choi, Jin-A;Park, Sejung;Lim, Yon Soo;Nam, Yoonjae;Nam, Inyong;Park, Han Woo
    • Journal of Contemporary Eastern Asia
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    • 제20권2호
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    • pp.19-34
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    • 2021
  • The purpose of this study is to introduce a synergetic configuration of stakeholders, especially government and university, into the corporate social responsibility strategy. The alignment of a company's CSR efforts with its business practices and values must be communicated strategically for effective and successful business outcomes. Therefore, the proposed process of CSR evaluation takes into account the three helices of the Triple-Helix perspective, university, industry, and government (UIG), and investigates how involvement in the Triple Helix actors influence corporations with CSR initiatives. Specifically, whether the public's awareness of a corporation's CSR activities is heightened by the concurrent support of the three helixes will be examined. We propose a methodology that enables corporations to determine effective levels of integration with government and educational institutions. The intensity of Triple-Helix indicators will be examined.

NOTE ON NULL HELICES IN $\mathbb{E}_1^3$

  • Choi, Jin Ho;Kim, Young Ho
    • 대한수학회보
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    • 제50권3호
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    • pp.885-899
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    • 2013
  • In this paper, we study null helices, null slant helices and Cartan slant helices in $\mathb{E}^3_1$. Using some associated curves, we characterize the null helices and the Cartan slant helices and construct them. Also, we study a space-like curve with the principal normal vector field which is a degenerate plane curve.

Flattened Helix 구조에서 복소전파상수 (COMPLEX PROPAGATION CONSTANT IN THE FLATTENED HELIX STRUCTLRE)

  • 고지환;조영기
    • 한국전자파학회:학술대회논문집
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    • 한국전자파학회 2001년도 종합학술발표회 논문집 Vol.11 No.1
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    • pp.16-19
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    • 2001
  • 접지된 유전체위에 스트립 격자에 대해 파가 비스비스듬하게 도파할 경우에 비교적 평탄한 Helix 구조로 볼수 있으며 이때 누설파 안테나 관점에서 복소전파상수와 복사패턴을 구하는 방법을 제시하였다. 그리고 유전체 두께가 매우 얇은 경우와 비교적 두꺼운 경우에 대하여 유전체 내부에서 파가 스트립 격자를 가로 질러 도파하거나 비스듬하게 도파하는 경우에 복소전 파상수와 복사패턴을 수치 계산하여 비교 고찰하였다.

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기생피자식물(Cuscuta cephalanthi)과 그 숙주(Hedera helix)에서 acid phosphatase활동의 형광분석법에 의한 측정 (Fluorometric Measurement of Acid Phosphatase Activity in the Angiosperm Parasite (Cuscuta cephalanthi) and its Host (Hedera helix))

  • 이상태
    • Journal of Plant Biology
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    • 제21권1_4호
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    • pp.39-44
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    • 1978
  • Acid phosphatase activities were analyzed in $\mu\textrm{g}$ tissue samples from an angiosperm parasite (Cuscuta cephalanthi) and its host plant (Hedera helix) by a fluorometric microtechnique. The apex and the coiling portion of the parasite axis exhibited greater enzyme activies than other portions of the hypha. Acid phosphatase activity in the haustorium was 2-3 times that in the hyphal axis. The vascular bundles of the normal host exhibited the greatest enzyme activity. The acid phosphatase activity in the host infected by the parasite decreased to the activity level of the haustorium.

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SVM과 HMM을 이용한 $\alpha$-Helix 막횡단 단백질 예측 (Predicting Transmembrane $\alpha$-helix protein with SVM and HMM)

  • 송철환;유성준;김민경;설영주
    • 한국정보과학회:학술대회논문집
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    • 한국정보과학회 2003년도 가을 학술발표논문집 Vol.30 No.2 (2)
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    • pp.817-819
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    • 2003
  • 현재 바이오인포매틱스(Bioinformatics) 분야에서 가장 중요한 부분 중의 하나는 유전자 및 단백질의 구조와 기능을 정확하게 예측하는 것이다. 이는 질병 치료 및 신약개발에 유용하여 이로부터 나온 결과로부터 경제적 산업적 효과를 기대할 수 있다. 이 논문에서는 기계학습(Machine Learning)의 한 분야인 SVM(Support Vector Machine)과 HMM(Hidden Markov Model)를 결합하여 단백질의 막횡단(Transmembrane) $\alpha$-Helix 단백질 지역을 예측하는 새로운 알고리즘을 개발, 구현 및 실험하였다. 그 결과 이 두 가지 알고리즘이 결합된 방식을 사용함으로써 성능을 향상 시킬 수 있음을 증명했다.

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탐지 레이다용 헬릭스 진행파관 증폭기 지연파구조 특성 연구 (Applicable Study on Helix TWTA of Slow-Wave Structure for Surveillance RADAR)

  • 윤인철;김희식
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 심포지엄 논문집 정보 및 제어부문
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    • pp.145-150
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    • 2008
  • 본 논문에서는 탐지레이다용 진행파관증폭기 (TWTA: Traveling Wave Tube Amplifier)의 개발을 위한 지연파구조 특성을 제안한다. 지연파구조 특성 및 이론적 해석을 위해 증폭기 설계 및 구현시 HFSS Code와 LMSuite Code를 활용 하였다. 나선형 저속파 진행파관 증폭기의 절단 및 시뮬레이션을 통하여 제안한 측정값이 설계규격을 만족시키는 결과를 얻었다. 본 논문에서 제안만 규격은 매우 유용하며 따라서 차후 유사장비 개발시 적용 가능할 것으로 판단된다.

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Analysis of the Drag Angle in Cone Drum False Twisting Mechanism

  • Lee, Choon-Gil
    • 한국의류산업학회지
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    • 제3권5호
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    • pp.473-478
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    • 2001
  • The newly developed cone drum twister is one of the outer surface contacting friction-twisting devices in false-twist texturing. An investigation of the drag angle for the newly developed cone drum twister texturing mechanism is reported. An analysis is given from which equations can be derived that relate to the conical angle of cone drum, wrapping angle, drag angle, and yam helix angle. Theoretical values of drag angle are calculated and discussed. It is shown that, as the helix angle and the projected wrapping angle increases, the drag angle also increases slowly until the helix angle of $40^{\circ}$ but after the helix angle of $40^{\circ}$ the drag angle increases rapidly. Furthermore the higher the projected wrapping angle and conical angle, the higher the drag angle of friction surface.

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Comparison of Oct-2-enyl and Oct-4-enyl Staples for Their Formation and α-Helix Stabilizing Effects

  • Pham, Thanh K.;Yoo, Jiyeon;Kim, Young-Woo
    • Bulletin of the Korean Chemical Society
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    • 제34권9호
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    • pp.2640-2644
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    • 2013
  • The all-hydrocarbon i,i+4 stapling system using an oct-4-enyl crosslink is one of the most widely employed chemical tools to stabilize an ${\alpha}$-helical conformation of a short peptide. This crosslinking system has greatly extended our ability to modulate intracellular protein-macromolecule interactions. The helix-inducing property of the i,i+4 staple has shown to be highly dependent on the length and the stereochemistry of the oct-4-enyl crosslink. Here we show that changing the double bond position within the i,i+4 staple has a considerable impact not only on the formation of the crosslink but also on ${\alpha}$-helix induction. The data further increases the understanding of the structure-activity relationships of this valuable chemical tool.

Triple Helix and the Circle of Innovation

  • Phillips, Fred
    • Journal of Contemporary Eastern Asia
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    • 제13권1호
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    • pp.57-68
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    • 2014
  • This paper positions the triple-Helix as a meso-level notion, an epicycle in a grander circle of technological change, institutional change, and psychological change. Because of the differing speeds of these several kinds of change, speed is proposed as a high-level system metric. This implies that what we commonly call bridging agencies or facilitators - lawyers, venture capitalists, incubators, etc. - are better called buffering agencies, as they help to engage entities changing at different speeds. They use human judgment as well as information technologies to choose feasible timing for these engagements. The paper highlights implications for thinking about innovation diffusion: The grand cycle of socio-technical change means we should, rather, think in terms of innovation reinforcement, or a circle of innovation.

A New Pattern of Technology Transfer in Rural China: Triple Helix of Academy-agriculture-government Relations in Baoji City

  • Tu, Jun;Gu, Shulin;Wu, Guisheung
    • 기술혁신연구
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    • 제13권2호
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    • pp.157-178
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    • 2005
  • During the transformation of the agro-technology extension in rural China, many new Policy experiments are emerging to rebuild the lost linkages and to improve technology transfer with the system and among systems. Applying the Triple Helix Model of academy-agriculture-government relations, this paper explores a new pattern of technology transfer with the case of BaojiCity. The authors interpret the mechanism of 'Courtyards for Agro-experts', as well as the comparison between different types of courtyards. This article concludes that the Triple Helix in the agro-sector improves technology transfer and accelerates knowledge-based regional development. In the interest of farmers there should also be concern over reducing inequity the reform.

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