• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.983-986
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• 2007

Concrete surface grinding is required for flatness and adhesiveness of concrete surface. The procedure is, however, labor intensive and has a hazardous work condition. Also, the productivity and the quality of concrete surface grinding depend on the levels of worker. Thus, the development of remote controlled concrete surface grinding equipment is necessary to prevent the environmental pollution and to protect the workers from hazardous work condition. However, it is difficult to evaluate the grinded surface objectively in a remote controlled system. The machine vision system developed in this study takes the images of grinded surface with the network camera for image processing. Then, by representing the quality test results to the graphic MMI program of the remote control station, the quality control system is constructed. The machine vision algorithm means the image processing algorithm of grinded concrete surface and this paper presents the objective quality control standard of grinded concrete surface through the application of the suggested algorithm.

• Applied Microscopy
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• v.34 no.2
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• pp.95-102
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• 2004

The TEM samples prepared by ion milling have the advantage that thin area can be obtained from almost any materials. However, it has the disadvantage that the amount of thin area can often be quite limited. For the cross-sectioned samples and grossly heterogeneous materials, the thickness of less than $0.1{\mu}m$ can be achieved by mechanical grinding and polishing (tripod polisher) and then the TEM samples may be ion-milled for final thinning or cleaning. These approaches were described in this paper. Examples of TEM observations were taken from cross-section samples of thin films on silicon and sapphire, from diffusion layers between $Mo_5Si_3\;and\;Mo_2B$, and from rapidly solidified 304 stainless steel powders embedded in electroplated copper.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.358-358
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• 2012

최근 기후변화의 영향에 따라 강수량과 증발산량이 변하는 경향을 보이고 있으며, 그에 따라 유출량도 변하고 있다. 따라서 기후변화가 수자원에 미치는 영향도 커지고 있으며, 댐 유역의 유출량 산정은 홍수나 용수의 확보측면에서 중요시 되고 있다. 탱크모형은 일본의 Sugawara가 1961년 처음 개발한 모형으로 유역을 오리피스 유출공을 가진 저류형 수조의 조합으로 가정하여 유량을 산정하는 유출모형으로 매개변수가 많고, 이들을 시행착오로 결정해야 하기 때문에 숙련된 경험이 요구되는 단점이 있으나 계산법이 명확하고 수문현상을 잘 재현한다는 장점이 있다. 탱크에는 강수량, 유출량, 그리고 증발량과 같은 입력 자료가 필요하며, 정확한 실제 증발산량 값을 알기는 어렵기 때문에 물수지를 이용해 증발산량을 계산하여 사용하고 있지만 유출량 미계측 지역에서는 사용이 어렵다. 그러므로 태양복사에너지, 온도, 바람, 기압, 습도와 같은 기상학적 인자에 따라서 잠재증발량을 산정하여 탱크 모형의 입력 자료로 사용한다면, 유출량자료가 없는 유역에서도 탱크모형을 사용하여 유출량을 산정할 수 있을 것으로 사료된다. 본 연구에서는 섬진강댐유역과 합천댐유역의 유출량 산정을 위해 잠재 증발산량 산정식(Penman, FAO P-M, Makkink, Preistley-Taylor, Hargreaves)을 적용하여 Tank 모형 매개변수들의 민감도분석을 수행하였다. 섬진강댐은 전북 임실군 강진면 옥정리와 정읍시 산내면 종성리 사이에 있으며, 유역면적은 $763km^2$, 댐 높이는 64m, 제방길이 344.2m 댐으로 매개변수 민감도 분석 적용기간은 1975년~1992년이다. 합천댐은 경상남도 합천군 대병면 회양리에 있는 댐으로 높이 96m, 길이 472m, 유역면적 $925km^2$의 다목적 댐이며, 매개변수 민감도 분석 적용기간은 1989년~1999년이다.

• Korean Journal of Social Welfare Studies
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• v.44 no.3
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• pp.323-346
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• 2013

The main purpose of this study is to analyze job sequences according to poverty profiles that the working poor have had. For the stated purpose, this study examines characteristics and patterns of job sequences by diving the subgroups, using the 10 year data of KLIPS and the sequence analysis. Major findings are as follows. The working-transient poor have different characteristics, such as longer working term, less job change, less number of gap and length, and relatively higher monthly income, from the working-recurrent poor and the working-persistent poor. However, there are no different characteristics between the working-recurrent poor and working-persistent poor, except for monthly income. Job sequences are divided into 5 clusters and job sequences types according to the working poor subgroups are quite different. Such analysis results would contribute to planning poverty policies based on job sequences differently seen in subgroups and finding specific policy alternatives to relieve the working poor.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.34 no.3
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• pp.183-188
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• 2008

Initial screening assay for depigmenting agents includes in vitro mushroom tyrosinase assay and antioxidant assay. Based on this screening result, melanin synthesis in melanocyte, in screened samples, is further measured. Measuring cellular melanin needs time, human resource, and skills. Therefore initial screening method should be reliable. We examined, 34 Chinese herbs, correlated the screening assay methods with cellular melanin. No reliable relationship was observed between factors, indicating the limitation in the use of these assays, probably due to the complexicity of melanogenesis.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.19 no.4
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• pp.77-89
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• 2009

As the awareness on the information security has been well developed, there have been various studies on effective training and management of the information security workforce. But, one of the most important things for the effective training is to develop education programs based on knowledge and skills requirements for information security professionals. This study aims to analyze the required and possessed levels of knowledge and skills for information security professionals' career. For this study, we selected 71 critical knowledge and skills for information security professionals by literature review and Delphi method, and we conducted a survey of information security knowledge and skills requirements for information security professionals to perform their jobs. As a result, we analyzed the current status of the information security professionals' knowledge and skills level and suggested some guidelines for educating information security professionals by their job career.

• Journal of the Society of Disaster Information
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• v.19 no.1
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• pp.128-137
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• 2023

Purpose: This study proposes a way to improve quality and increase safety by studying a method that allows the system scaffolding, which is partly used for high-altitude work at construction sites, to be applied to various types of structures in shipbuilding and plant industry sites. Method: A fact-finding survey was conducted targeting 8 companies, and a plan was established that reflected the opinions of the field survey and the practitioners and experts by analyzing the literature and the Internet survey. Result: Through analysis of related patents, FGI with companies, etc., we discovered the possibility of application expansion through research and development of materials that can be applied to various types and improvement plans for enhancing the professionalism of construction companies. Conclusion: System scaffolding has a high importance in terms of safety, but related research around the world is sluggish. Therefore, it will be possible to meet the demands for quality and safety by enhancing the software expertise and developing and researching user materials that can be applied to various types.

• The Journal of the Convergence on Culture Technology
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• v.10 no.3
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• pp.801-807
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• 2024

Linear motion robots are devices that perform functions such as transferring parts or positioning devices, and require high precision. In companies that develop linear robot application systems, human workers are in charge of quality control and fault diagnosis of linear robots, and the result and accuracy of a fault diagnosis varies depending on the skill level of the person in charge. Recently, there have been many attempts to utilize artificial intelligence to diagnose faults in industrial devices. In this paper, we present a system that automatically diagnoses linear rail and ball screw misalignment of a linear robot using transfer learning. In industrial systems, it is difficult to obtain a lot of learning data, and this causes a data imbalance problem. In this case, a transfer learning model configured by retraining an established model is widely used. The information obtained by using an acceleration sensor and torque sensor was used, and its usefulness was evaluated for each case. After converting the signal obtained from the sensor into a spectrogram image, the type of abnormality was diagnosed using an image recognition artificial intelligence classifier. It is expected that the proposed method can be used not only for linear robots but also for diagnosing other industrial robots.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.3
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• pp.407-416
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• 2019

This study is about a Customized Nursery School where working women can support work - life balance and a reduction in retirement or turnover. The research method is to identify the current status of Customized Nursery services and to recognize the recognition and need of the operation of Customized Nursery School. The importance of securing skilled nurses and preventing them from changing their jobs for the health and safety of people cannot be emphasized enough. A Customized Nursery School must be opened to reduce the retirement or change of jobs of working women nurses and to provide care for continuous work in three shifts from 365days to support the balance between the working mother and family. It is considered that nurses will put their children in relief when using retired nurses who have the ability to work 24hour rotation in a Customized Nursery School and when a Customized Nursery School be ran suited for the condition and demand of working women nurses, it is expected to reduce retirement and the change of jobs, also to give positive effect on marrige and family planning which would make improvement in low birthrate. To activate the Customized Nursery School, Creating a secure learning environment and qualification of educators great effort should be put. A program curriculum based on 'basic life and habits' should be the center of education. Continuous management and effort will need to be placed in continuous development of educators.

• Journal of The Korean Association For Science Education
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• v.38 no.6
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• pp.781-792
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• 2018

In modern society, as technology develops and industry diversifies, students can choose from a variety of career paths. Since science, technology, engineering, and mathematics require a longer education and experience than other fields, it is important to design science education policies based on the competencies required for science, technology, engineering, and mathematics (STEM) occupations. This study explores the definition of science and technology manpower and STEM occupations and identifies core competencies of STEM occupations using standard job information operated and maintained by the US Department of Labor ($O^*NET$). We specially analyzed ratings of the importance of skills (35 ratings), knowledge (33 ratings), and work activities (41 ratings) conducting descriptive analysis and principal component analysis (PCA). As a result, core competencies of STEM occupations consist of STEM problem-solving competency, Management competency, Technical competency, Social service competency, Teaching competency, Design competency, Bio-chemistry competency, and Public service competency, which accounts for 70% of the total variance. This study can be a reference for setting the curriculum and educational goals in secondary and college education by showing the diversity of science and technology occupations and the competencies required for STEM occupations.