• 제목/요약/키워드: growth orientation

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Characteristics of fluoride/glass as a seed layer for microcrystalline silicon film growth

  • Choi, Seok-Won;Kim, Do-Young;Ahn, Byeong-Jae;Yi, Jun-Sin
    • 한국정보디스플레이학회:학술대회논문집
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    • 2000.01a
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    • pp.65-66
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    • 2000
  • Various fluoride films on a glass substrate were prepared and characterized to provide a seed layer for crystalline Si film growth. The XRD analysis on $CaF_2/glass$ illustrated (220) preferential orientation and showed lattice mismatch less than 5 % with Si. We achieved a fluoride film with breakdown electric field of 1.27 MV/cm, leakage current density about $10^{-6}$ $A/cm^2$, and relative dielectric constant less than 5.6. This paper demonstrates microcrystalline silicon $({\mu}c-Si)$ film growth by using a $CaF_2/glass$ substrate. The ${\mu}c-Si$ films exhibited crystallization in (111) and (220) planes, grain size of $700\;{\AA}$, crystalline volume fraction over 65 %, dark- and photo-conductivity ratio of 124, activation energy of 0.49 eV, and dark conductivity less than $4{\times}10^{-7}$ S/cm.

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Effect of Heating Rate and Pressure on Pore Growth of Porous Carbon Materials

  • Cho, Kwang-Youn;Kim, Kyong-Ja;Riu, Doh-Hyung
    • Carbon letters
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    • v.7 no.4
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    • pp.271-276
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    • 2006
  • Porous carbon materials were prepared with a thermal treatment of coal tar pitch at 550 in the Ar gas. Growth, merger, and distribution of pore were characterized with scanning electron microscopy as variation ascending temperature gradient and chamber pressure. After graphitizing at the 2600 (1 hr.), walls and connecting parts between pores were investigated with X-ray diffraction patterns. Wall thickness and pore size decreases as increasing ascending temperature gradient, and pore size becomes homogeneous. Graphite quality and thermal conductivity become higher due to the enhanced orientation of walls and connecting parts between pores.

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Deposition of PbTio3 thin films by reactive sputtering

  • Ahn, Y.S.;Lee, D.S.;Ahn, E.J.;Yoon, E.
    • Journal of Korean Vacuum Science & Technology
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    • v.3 no.2
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    • pp.126-129
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    • 1999
  • PbTio3 is a promising material with perovskite structure for pyroelectric sensor applications with its superior pyroelectric properties, low dielectric constants, and low piezoelectric constants. Growth of pyroelectric thin films in general, needs relatively higher temperatures than those of conventional Si semiconductor processing However, low growth temperature is advantageous for the device integration. We report the low temperature (350$^{\circ}C$) growth of PbTio3 thin films by 3-gun DC magnetron reactive sputtering. The effects of substrate temperature, Pb-flux, and total pressure on crystalinity and preferred orientation of PbTio3 thin films are reported.

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Changes in National-Level Locational Pattern of Professional Sports Franchises in the U.S. during 1950-2001 : Focusing on Four Major Sports Leagues (미국 프로스포츠 프랜차이즈의 입지패턴과 그 변화양상(1950-2001))

  • Pillsung Byun;Ahn, Young-Jin
    • Journal of the Korean Geographical Society
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    • v.37 no.5
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    • pp.498-510
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    • 2002
  • This study has the following two focuses to analyze the changes in national-level locational pattern of the U.S. professional sports franchises during 1950-2001. The first is to empirically clarify spatial orientation in the changing locational pattern of sports franchises. The second is to identify compared characteristics of the relocation cases reflecting the orientation to other cases, for the variables indicative of franchises' and leagues' pursuits of their relocation-related interests ultimately affecting franchises' relocations, by employing a legit model. As a result of the analyses, sports franchises and leagues, respectively have shown spatial orientation toward relocating to and toward locating new franchises in southern and western areas, responding to the changes in U.S. urbanization pattern. And, relocation cases reflecting the orientation have displayed a feature of the higher annual population growth rate in destination urban area than in origin area, in comparison to other cases.

A Study on the effects of Professional Self-Concept of Dietitian's on Job Satisfaction and Customer Orientation (영양사의 전문직 자아개념이 직무만족도와 고객지향성에 미치는 영향에 관한 연구)

  • Ko, Seong Hee
    • The Journal of the Korea Contents Association
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    • v.18 no.10
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    • pp.394-402
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    • 2018
  • Recently, the domestic food service industry has grown in quantity and quality. Among them, the foodservice market in the group has grown to become infinitely competitive as well as the growth, and the role of the dietitian has been diversified. The professional self-concept refers to the feeling of self-own work as a professional person and his or her opinion, and the professional worker with a positive professional self-concept improves his / her ability to perform his or her job. The purpose of this study is to analyze the effect of dietitian's professional self-concept on job satisfaction and customer orientation. Among the subordinate factors of professional self-concept, leadership, usability, technology, and communication showed that technology and communication had a significant effect on job satisfaction. The results of this study are as follows. First, the effect of technology was found to be significant. Customer orientation is significantly influenced by communication and technology. In other words, the attitude of trying to satisfy the needs and desires of the customers as a nutritionist was found to be higher when the self-evaluating ability of the customer or other people is high.

Testing the Auto-regressive Cross-lagged Effects Between Relative Extrinsic Value Orientation and Life-satisfaction (상대적 외적 가치 지향과 삶의 만족 간 자기회귀교차지연 효과 검증)

  • Koo, Jaisun
    • Science of Emotion and Sensibility
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    • v.22 no.4
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    • pp.85-96
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    • 2019
  • The relative extrinsic value orientation (REVO) means the relative importance to extrinsic values (e.g. wealth, fame and social approval) compared with intrinsic values (e.g. affiliation, self-acceptance and personal growth). This study aimed to investigate the causal relation between REVO and life-satisfaction using the auto-regressive cross-lagged modeling. For this purpose, 3rd, 5th, and 7th year data from the Korea Children and Youth Panel Survey (KCYPS) middle school 1st grade panel was analyzed (N = 2,259; 1,140 males and 1,119 females). The results are as follows; Firstly, positive auto-regressive effects of REVO and life-satisfaction were significant. Secondly, REVO was found to have negative and cross-lagged effect on life-satisfaction. However, cross-lagged effect from life-satisfaction to REVO was not significant. Finally, no gender difference was found in this relationship. These results suggest that low life satisfaction does not cause the relative extrinsic value orientation, but high relative extrinsic value orientation may cause low life satisfaction.

Characteristics Comparison of Prepared Films According to Influence of Adsorption Inhibitor in the Condition of Deposition (PVD증착용 흡착인히비터의 영향에 따른 제작막의 특성 비교)

  • 이찬식;윤용섭;권식철;김기준;이명훈
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2001.11a
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    • pp.67-67
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    • 2001
  • The structure zone model has been used to provide an overview of the relationship between the microstructure of the films deposited by PVD and the most prominent deposition condition.s. B.AMovchan and AV.Demchishin have proposed it firstls such model. They concluded that the general features of the resulting structures could be correlated into three zones depending on $T/T_m$. Here T m is the melting point of the coating material and T is the substrate temperature in kelvines. Zone 1 ($T/Tm_) is dominated by tapered macrograins with domed tops, zone 2 ($O.3) by columnar grains with denser boundaries and zone 3 ($T/T_m>O.5$) by equiaxed grains formed by recrystallization. J.AThomton has extended this model to include the effect of the sputtering gas pressure and found a fourth zone termed zone T(transition zone) consisting of a dense array of poorly defined fibrous grains. R.Messier found that the zone I-T boundary (fourth zone of Thorton) varies in a fashion similar to the film bias potential as a function of gas pressure. However, there has not nearly enough model for explaining the change in morphology with crystal orientation of the films. The structure zone model only provide an information about the morphology of the deposited film. In general, the nucleation and growth mechanism for granular and fine structure of the deposited films are very complex in an PVD technique because the morphology and orientation depend not only on the substrate temperature but also on the energy of deposition of the atoms or ions, the kinetic mechanism between metal atoms and argon or nitrogen gas, and even on the presence of impurities. In order to clarify these relationship, AI and Mg thin films were prepared on SPCC steel substrates by PVD techniques. The influence of gas pressures and bias voltages on their crystal orientation and morphology of the prepared films were investigated by SEM and XRD, respectively. And the effect of crystal orientation and morphology of the prepared films on corrosion resistance was estimated by measuring polarization curves in 3% NaCI solution.

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A Study on the Information Security Related Organizational Citizenship Behavior: From Prospect Theory and Goal Orientation Theory Perspective (정보보안 관련 조직시민행동에 대한 연구: 개인 전망, 조직 목표지향성 관점을 중심으로)

  • Hwang, In-ho;Hu, Sung-ho
    • Journal of Digital Convergence
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    • v.19 no.1
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    • pp.89-97
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    • 2021
  • The purpose of this study is to verify the influence of the cognitive process related to the organizational citizenship behavior. The research method consisted of the cross-design of the prospect dimension and goal orientation dimension, and information security factors consisted of distributive justice, response efficacy, self efficacy, and organizational citizenship behavior. As a result of the study, the dimension of prospect had a significant effect on response efficacy and self efficacy, and it was found that the influence of the gain condition was greater than that of the loss condition. The goal orientation dimension had a significant effect on response efficacy and self efficacy, and it was found that the influence of the growth condition was greater than that of the validation condition. The research model that explained the relationship between information security factors appeared as a partial mediating model between distributive justice, response efficacy, and organizational citizenship behavior. The implications of this study suggest that it is necessary to establish an information security strategy in combination with individual decision-making factors and organizational culture factors.

The Study on the Effects of Technology Orientation and Market Orientation on Managerial Performance in Innopolis Start-ups: Focusing on the Moderating Effects of Marketing and R&D Expenses (연구소기업의 기술지향성과 시장지향성이 경영성과에 미치는영향: 마케팅 및 연구개발 비용의 조절효과를 중심으로)

  • Kwon, Haram;Yang, Young Seok
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.19 no.1
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    • pp.119-133
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    • 2024
  • As a result of significant investments by the government in promoting public technology commercialization and fostering a venture startup ecosystem, there have been quantitative achievements, such as the registration of over 1,600 Innopolis Start-ups since 2006, generating a total revenue of 1.1 trillion won as of 2021. However, these achievements have been overshadowed by critical qualitative challenges, including a continuous decline in average revenue per Innopolis Start-up. This led to a focus on whether managers' technological and market orientations affect business performance. This study aims to provide insights into improving the qualitative growth of Innopolis Start-ups by analyzing the effects of technological and market orientations on business performance, as well as the moderating effects of adjusting marketing and research and development (R&D) costs on this relationship. Through prior research and empirical analysis, this study derives three main findings. First, technological excellence and innovation significantly influence the business performance of Innopolis Start-ups, while technological intensity does not. Second, customer orientation and competitive orientation significantly impact business performance, whereas entry barriers as a single factor do not. Third, adjusting marketing and R&D costs, as controlled variables obtained through general situations, has no direct impact on other variables. However, it interacts with entry barriers, influencing financial business performance, with R&D costs exhibiting a negative buffering effect and marketing costs showing a positive enhancing effect. This study confirms that both technological and market orientations directly influence the business performance of Innopolis Start-ups, thus being crucial factors affecting their growth. Moreover, it establishes that investments in marketing and R&D play significant roles in alleviating initial entry barriers and enhancing financial performance. Consequently, it underscores the importance of reinforcing technological and market orientations tailored to the characteristics of Innopolis Start-ups. Additionally, it proposes five theoretical contributions: strengthening institutional support systems for technology commercialization and innovation, improving qualitative evaluation criteria during the selection process of Innopolis Start-ups, conducting comprehensive analyses of technological and market aspects during startup selection, enhancing support for marketing education and consulting for smooth market entry, and supporting expenditure strategies and milestone setting tailored to the industrial characteristics of individual Innopolis Start-ups.

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Fatigue Creak Growth Properties of Welded Joint for the Railway Bridge Steel (철도교량(鐵道橋梁)의 용접부(鎔接部)에서 피로(疲勞)균열의 성장특성(成長特性))

  • Chang, Dong Il;Yong, Hwan Sun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.4 no.1
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    • pp.125-136
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    • 1984
  • In the weled structures, fatigue fracture mainly depends upon crack growth behavior. Specially anisotropy of crack growth orientation and welding direction become important factor of fracture in the welding jone. When fatigue stressed steel welded with nonfatigue stressed steel, at the low stress intensity factor range, residual stress become more important factor of growth behavior then properties of base metal but when the crack growth in the weld metal, toughness of weld metal become the most important factor. Especially nonhomgeniety of toughness for the weld metal make more scatter the relations of $da/dN-{\Delta}K$.

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