• The Science & Technology
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• v.10 no.9 s.100
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• pp.60-63
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• 1977

우리나라 임학은 전후 황무지와도 같은 벌판을 개척해 왔다고 볼수 있다. 사실 광복직후는 사회질서 정치질서의 혼란으로 학계의 체통같은 것은 생각 할 수도 없었고 그 정리에 착수한다는 것도 쉽게 될수 없었다. 임업기술 같은 것은 멀리 이조의 실학에 까지 찾아 볼수 있으나 전전 우리나라에서 임학다운 교육이 실시된 곳은 현 서울대학교 농과대학의 전신인 수원고등농림학교 임학과라고 볼수 밖에 없다. 이밖에 주로 일본의 대학 또는 고등농림학굥서 수학한 분들이 임학의 초석으로서 개척이라는 어려운 시련앞에 서게 되었든 것이다. 소위 해방이란 것은 당시 모든것은 백지상황에서 출발시켰다. 이의 열외가 될수 없듯이 임학도 첫머리부터 실을 풀고 마디를 맺어나가지 않으면 안되었다. 전후 약 30년이 흘렀는데 일단 이것을 10년을 구분해서 그 간의 임학계의 성격을 살펴본다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.322-323
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• 2002

다단임팩터와 입자하전기, 전류측정기를 결합하여 입자상물질의 크기분포를 실시간으로 모니터링 할 수 있는 기술에 대하여 기초적인 연구는 선행연구에서 수행되었으며, 다단임팩터의 성능평가 결과는 권순박 등(2002a)이 발표하였으며, 입자하전기에 대한 성능평가결과는 권순박 등(2002b)이 보고하였다. 이에 본 연구에서는 다단임팩터와 입자하전기 및 전류측정장치를 결합하여 입자상물질 실시간 모니터링을 위한 측정장치를 개발하였다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.320-321
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• 2002

가상임펙터(virtual impactor)는 충돌판을 가지고 있는 관성임팩터(inertial impactor)와는 다르게 분리입경보다 큰 입자를 분리할 수 있는 부 유동과 분리입경보다 작은 입자를 분리할 수 있는 주 유동으로 나누어져서 입자의 튀김(bouncing)이나 재비산(reentrainment) 없이 입자를 분리 또는 농축할 수 있다. 하지만 관성임팩터처럼 여러 단을 연결하여 작은 입자를 분리할 수 없기 때문에 주로 큰 입자의 분리 및 농축에 쓰여왔다. (중략)

• The monthly packaging world
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• s.313
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• pp.90-93
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• 2019

지난 4월 16일 경기도 일산 KINTEX 그랜드볼룸에서 열린 '제13회 미래패키징 신기술 정부포상' 시상식에서 임경호 (사)한국포장협회 회장이 공로부문 산업통산자원부 장관표창을 수여받았다. 임경호 회장은 세미산업(주) 대표이사로서 우리나라 포장산업 육성 및 기술 개발에 주력하고 있을 뿐만 아니라 (사)한국포장협회 제14대 회장으로 재임하면서 국내 포장산업 발전을 위해 다양한 활동을 추진하고 있다. 임 회장을 만나 포장기업을 이끄는 경영인이자 관련 단체를 이끄는 수장으로서 포장산업 전반에 대한 이야기를 나눠보았다.

• Journal of Korean Society of Forest Science
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• v.106 no.2
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• pp.219-229
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• 2017

Forest road is an essential infrastructure for forest management such as the composition and management of forest resources, timber and forest byproduct production & transportation. It has recently been utilized forest recreation and forest sports as well as also forest pest control, forest fire prevention and evolution. When you build a forest road, the economic function in the forest is activated, so that it can result in the ripple effect of induced employment, value-added creation and production inducement. The purpose of this study is to analyze the impact caused by forest road construction occurring as the overall economy. For analysis it was applied to inter industry analysis method that is a method for analyzing the quantitative cross-correlation. The data were used in the Input-Output Tables In 2014, the Bank of Korea. When you build a forest road, economic effect due to the construction of the forest road is generated and economic effects are also generated due to the increase in the production of forest products after the construction of the forest road. Therefore, we will analyze the economic impact of the two effects. The estimated economic value of forest products, which is the economic effect of forest product cultivation, was calculated through some assumptions and the economic ripple effect was analyzed. The forest road construction sector is defined as land clearing and reclamation, and irrigation project construction and the forestry forest products sector is defined as the sum of raw timber, edible forest products and misc. forest products. In total, 32 sectors were classified, and except for the two sectors defined as forest road construction and forestry forest products, the remaining sectors were integrated according to the classification system of 30 integrated classifications of the Bank of Korea. As a result, the production inducement coefficient for forest construction was analyzed to be 2.767 and the production inducement coefficient for forestry forest products was analyzed to be 1.565. This means that 2,767 times the production of forest road construction investment is induced in the whole industry and the production of 1.562 times the amount of forestry forest products is caused by the whole industry as the production of forestry forest products increases. The value added inducement coefficient for forest road construction was 0.977 and the value added inducement coefficient for forestry forest products was 0.985. Forest road are essential infrastructure for forestry development and should be continuously invested because they are essential elements of timber production and forest byproduct production with functions such as forest management, forest recreation, forest sports, and town connection.

• The Journal of Korean Academy of Prosthodontics
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• v.46 no.4
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• pp.381-395
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• 2008

Purpoose: For decades dental implants have been used widely in the field of prosthetic dentistry. However there is confusion when establishing treatment plans in cases where some teeth are remained but an insufficient number of implants can be used due to limited anatomical status and ecomomical problems. Many clinicians have tried to connect natural teeth and implants, and it still has controversy. But, there have been few studies on mechanical analysis of connecting natural teeth and implants with konus telescopic removable partial dentures. The purpose of this study was to analyze the stress distribution of prosthesis, abutment and alveolar bone when teeth and implants were connected with the konus telescopic denture, by means of 3-dimensional finite element analysis. Material and methods: The assumption of this study was that there were 2 mandibular canine (11 mm in length, 4 mm in diameter) and 2 implants(10 mm in length, 4 mm in diameter) which are located in the second premolar region. The mandible, teeth, implants, abutments, and connectors are modeled, and analyzed with the commercial software, ANSYS Version 8.1(Swanson, Inc., USA). The control group used implants instead of natural teeth. 21038 elements, 23544 nodes were used in experimental group and 107595 elements, 21963 nodes were used in control group, Stress distribution was evaluated under 150 N vertical load on 3 experimental conditions - between teeth and implants (Load case 1), posterior to implants (Load case 2), between natural teeth (Load case 3). Results: 1. In all load cases, higher von mises stress value was observed in the experimental group. 2. Maximum von miss stress observed in all load cases and all locations were as follows ; a. 929.44 Mpa in the experimental group, 640.044 Mpa in the control group in outer crown and connector - The experimental group showed 1.45 times high value compared with the control group. b. 145,051 Mpa in the experimental group, 142.338 Mpa in the control group in abutment - The experimental group showed 1.02times high value compared with the control group. c. 32.489 Mpa in the experimental group, 25.765 Mpa in the control group in alveolar bone - The experimental group showed 1.26times higher value compared with the control group. 3. All maximum von mises stress was observed in load case 2, and maxim von mises stress in alveolar bone was 32.489 Mpa at which implant failure cannot occur. 4. If maximum von mises stress is compared between two groups, the value of the experimental group is 1.02 times higher than the control group in abutment, 1.26 times higher than the control group in alveolar bone. Conclusion: If natural teeth and implants are connected with the konus telescopic denture, maximum stress will be similar in abutment, 1.26 times higher in alveolar bone than the control group. With this result, there may be possible to make to avoid konus telescopic dentures where natural teeth and implants exist together.

• The Journal of Korean Academy of Prosthodontics
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• v.46 no.2
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• pp.157-168
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• 2008

Statement of problem: Over the past two decades, implant supported fixed prosthesis have been widely used. However, there are few studies conducted systematically and intensively on the splinting effect of implant systems in mandible. Purpose: The purpose of this study was to investigate the changes in stress distributions in the mandibular implants with splinting or non-splinting crowns by performing finite element analysis. Materials and methods: Cortical and cancellous bone were modeled as homogeneous, transversely isotropic, linearly elastic. Perfect bonding was assumed at all interfaces. Implant models were classified as follows. Group 1: $Br{{\aa}}nemark$ length 8.5mm 13mm splinting type Group 2: $Br{{\aa}}nemark$ length 8.5mm 13mm Non-splinting type Group 3: ITI length 8.5mm 13mm splinting type Group 4: ITI length 8.5mm 13mm Non-splinting type An load of 100N was applied vertically and horizontally. Stress levels were calculated using von Mises stresses values. Results: 1. The stress distribution and maximum von Mises stress of two-length implants (8.5mm, 13mm) was similar. 2. The stress of vertical load concentrated on mesial side of implant while the stress of horizontal load was distributed on both side of implant. 3. Stress of internal connection type was spreading through abutment screw but the stress of external connection type was concentrated on cortical bone level. 4. Degree of stress reduction was higher in the external connection type than in the internal connection type.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.8 no.2
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• pp.175-185
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• 2013

This study is conducted in the form of purposive sampling among 215 social workers working in social welfare and living facilities located in the metropolitan area. The purpose of this study is to understand how organizational commitment and psychological empowerment affects job satisfaction and investigate the mediating effect of psychological empowerment when it comes to the relationship between organizational commitment and job satisfaction. In this study, it is observed that there is a significant impact of psychological empowerment on job satisfaction. The higher the level of psychological empowerment is, social workers tend to have a higher level of organizational commitment and job satisfaction. The result of investigation on mediating effect supports a mediating effect of psychological empowerment on the relationship between emotional/continuance/normative commitment and job satisfaction. In addition, the self-authority appears to have a mediating effect on the relationship between emotional/continuance/normative commitment and job satisfaction. Finally, competence also has a mediating effect on the relationship. The result supports the significant effect of the four hypotheses presented in this study. The result of this study implies that social workers' psychological empowerment has a positive effect on their organizational commitment and job satisfaction. Therefore, it can be used by an organization as an effective management technique.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.5
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• pp.207-215
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• 2018

As the environment changes rapidly and the diversity of organizational members increases in the modern organization, interest is increasingly focused on empowering leadership that gives more authority and autonomy to the individual. In this study, we demonstrate an effective process for empowering leadership that was examined by focusing on the leader acceptance of organization members. For this purpose, 293 questionnaires were collected from employees working in corporations, and the mediating effects of individual leader acceptance on the relationship between empowering leadership and individual effectiveness (individual innovative behavior, individual performance) were verified. Hypothesis testing revealed that empowering leadership had a significant influence on both individual innovative behavior and individual performance. Second, in the relationship between empowering leadership and individual innovative behavior, individual leader acceptance was completely mediated. Third, in the relationship between empowering leadership and individual performance, individual leader acceptance was completely mediated. This study suggests that individual leader acceptance is important for empowering leadership effectiveness. In order for empowering leadership to be more effective, we propose that leaders make empowering behaviors according to the organization members' level of maturity and personal values.

• Korean Journal of Social Welfare Studies
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• v.43 no.2
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• pp.207-233
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• 2012

The purpose of this study is to understand direct and indirect impact and the paths of community participation and social capital, which affect improvement of single mother's community participation factors, social capital, and empowerment. To accomplish this purpose structural relationships between single mother's community participation factors, social capital and empowerment have been analyzed. For the analysis 420 single mothers, who had participated various types of communities, were surveyed and structural equation modeling had been used and optical theory structure model(χ²=86.851, df=28, GFI=.958, CFI=.944), which explains the structural relationship among the factors, had been chosen. From the result, first, there was differences between empowerment and community participation levels, which is single mothers' community participation factors, of the impact on social capital and empowerment. Empowerment level of community, which was mediated by community participation level and social capital, affected empowerment, in the other hand, community participation level affected empowerment more directly than the impact of social capital. Second, single mothers' community participation factor affected more improvement of empowerment when it mediated by the accumulation of social capital. Third, single mothers' social capital directly affected the most improvement of empowerment. Based on the fact the implications of the study were presented.