• The Journal of Korean society of community based occupational therapy
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• v.6 no.1
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• pp.1-11
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• 2016

Purpose : By confirming the relationship of the Social Network Service(SNS) strength and social participation, it tries to present the basic data of the social participation of the university students. Method : Students that department of Occupational Therapy in K University was done to target 136 people. SNS strength was measured to be stored in the mobile phone SNS friends and KakaoTalk average call times. measurement tool of social participation was used Maastricht Social Participation Profile(MSPP) as modifed by Godelief et al.(2009). MSPP is composed of formal social participation(undertaking) and informal social participation(contact with friends and acquaintances and contact with family) item. Results : The study shows a significant correlation between the number of SNS friends and Undertaking item and between KakaoTalk average call times and Contact with friends and acquaintances item(${\alpha}=0.05$). Conclusion : College student SNS strength and social participation showed a correlation. Therefore, The higher the SNS strength and social participation is determined to have a positive impact on the daily life of college students.

• Journal of Preventive Medicine and Public Health
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• v.30 no.2 s.57
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• pp.381-391
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• 1997

In an epidemiological study of metal workers exposed to metalworking fluids (MWF), the prevalence time of Evolution, seasonal occurrence and clinical type of contact dermatitis were investigated. Compostional analysis of MWF with HPLC, dermatological examination and two consecutive questionnaire surveys were conducted. Study population was divided into two groups ; workers contact to cutting oil and workers contact to rust preventive oil. In the analysis of MWF, aliphatic hydrocarbons, having 12-20 carbons, was most common composition(49.04%) of cutting oil otherwise, major contents (90.99%) of the rust preventives oil were aliphatic hydrocarbons composed of 6-9 carbons. The frequency (point prevalence) of contact dermatitis(CD) was 7(12.7 per 100 subjects) in the dermatological examination of 55 workers. As the result of second survey for contact dermatitis, cumulative prevalence of oil working full-time and recent 1 year prevalence in two groups were 28.0, 16.7 and 15.1, 12.5 per 100 subjects. There were no difference in the prevalence of CD by oil, age, oil contact duration. Summer is the most common evolution season in workers exposed to cutting oil, but not in workers exposed to rust preventive oil. Major clinical type of CD was erythematous papules in both groups. It presents the importance of preventive measures that 51.1% suffer from contact dermatitis had medical care at their own expense, and 47.1% of them felt serious about their contact dermatitis. From the fact that 68.6% think cotton gloves protective apparatus, we emphasize the need for health education.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2001.11a
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• pp.177-180
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• 2001

선불방식의 화폐시스템에서 고객은 인출한 화폐를 은행으로부터 환불받을 수 있어야 한다. 그러나 분할된 화폐가 서로 연관될 수 있는 분할 가능한 화폐시스템에서는 고객이 사용한 화폐의 익명성을 유지하면서 남은 금액을 환불해주기가 어렵다. 이 논문에서 이런 문제를 해결한 새로운 방식의 환불 메커니즘을 제공한다. 제안된 새 방식에서 고객은 은행에 익명으로 접근하여 환불티켓을 인출하고, 나중에 인출된 티켓을 이용하여 기존 지불의 익명성을 유지하면서 환불을 받게 된다. 환불티켓을 사용하면 환불과정을 인출이나 지불과정과 독립적으로 제공할 수 있어 환불이 필요없는 경우에는 아무런 추가비용이 소요되지 않는 장점이 있다. 또한 같은 이유에서 여러 시스템에 쉽게 응용이 가능한 유연한 방식이다. 끝으로 환불액을 계속해서 하나의 티켓에 축적하는 방법을 사용하면 지불액과 환불액간에 직접적인 차액관계가 없어지므로 고객의 익명성이 증진되며, 은행에 접촉해야 하는 횟수를 줄여주는 효과가 있다.

• Proceedings of the KAIS Fall Conference
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• 2007.11a
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• pp.140-143
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• 2007

본 연구의 목적은 반도체 후공정 제조 시스템인 Screen Printer시스템에서의 프린팅 공정시 프린팅에 사용되는 Mesh Mask, Urethane Blade의 재질이 사용되는 반복횟수의 증가에 따라 재질의 변화에 의한 문제점과 프린팅 공정 파라미터인 Table 접촉거리, Squeegee 하강위치의 주변환경에 의한 변화를 보상하여 일정하게 프린팅이 될 수 있는 시스템을 구현 하는데 목적이 있으며, 이 논문은 서보모터를 구동하는 위치제어 시스템에 로드셀（Loadcell）을 이용하는 압력제어시스템을 연구하고 구현하고자 하였다.

• Korean Security Journal
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• no.51
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• pp.275-290
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• 2017

Since the establishment of Security Business Act in 1976, the Korean private security industry has rapidly grown in the qualitative and quantitative aspects. In the circumstance, various roles of private security guards have been demanded. A private security guard as the first contactor of the users of multi-use facilities should first find an accident field situation and make a response when an accident occurs, and should give first aid as most as possible until emergency medical workers arrive. However, there is a lack of first-aid education for the private security guards who are responsible for the safety of facility users. Therefore, the purpose of this study is first to find how many times private security guards have job and first-aid education, and analyze how the education count influences their first-aid ability; secondly to analyze how private security guards' satisfaction with first-aid education influences their first-aid ability. To achieve the purpose, this researcher conducted a questionnaire survey on first-aid ability of the private security guards working in the metropolitan areas. For data analysis, Stata se/ 14.0ver was applied. For the analysis on validity and reliability, exploratory factor analysis was conducted and a Cronbach's a value was drawn. To find the actual conditions of first-aid education, frequency analysis, inter-group difference analysis, and multi-regression analysis were conducted. According to the data analysis, there were not enough times of job education and first-aid education for private security guards, and their satisfaction with first-aid education and first-aid ability were difference depending on the job and first-aid education counts. Also, their satisfaction with first-aid education partially influenced their first-aid ability.

• Journal of Conservation Science
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• v.32 no.3
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• pp.377-384
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• 2016

There are physical and chemical method for removement of a lacquered layer existing on the surface when gilding an iron Buddha, these caused environmental pollution by surface degradation and is very noxious for conservation scientist's health. Thus, on this study, we conducted a lacquered layer removement experiments using Nd:YAG Laser which is contactless and eco-friendly. Specimens were made by polishing $5{\times}5$ size of iron(99.9%) specimens surfaces evenly and by differing of number of coating of unrefined lacquer, so there were thickness differences of $10{\mu}m$, $20{\mu}m$, and $30{\mu}m$. The laser machine used in this study was Nd:YAG Laser, and we used two wavelength modes; 1064 nm(160~180 mJ) for infrared light region and 532 nm(50~350 mJ) for ultraviolet light region. The experiment done by investigating the transition of specimens' surfaces with laser wavelength, energy, and numbers of investigation. The remain amount of lacquered layer surfaces before/after laser irradiation was investigated by stereoscopic microscope, observation by SEM, Non-contact Surface Roughness Measurement Device, and FT-IR etc. As a result of each analysis, we could verify the thickness of $10{\mu}m$, $20{\mu}m$ of lacquered layer removed without surface degradation when using 1064 nm wavelength with $1.0J/cm^2$ density. We could find out that Nd:YAG Laser is effective for removing remained lacquered layers when gilding an iron Buddha. In the future, when not only the metal has made various studies also wood lacquered furniture or the like, it seems to be utilized to remove the lacquer without surface damage.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.331-335
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• 2009

본 연구는 AIDS에 대한 지식과 태도를 파악하여 AIDS에 관한 올바른 지식을 전달할 수 있고, AIDS 교육의 기초 자료를 확보하고 제공하여 남자고등학생들의 AIDS예방과 편견불식에 도움을 주고자 시도 되었다. 조사 대상자는 울산지역에 소재하는 D고등학교 전교생 961명을 조사 대상으로 하여 설문조사를 실시하고 분석하여 906명의 표본으로 다음과 같은 결론을 얻었다. 1. 조사대상자의 AIDS에 대한 지식은 총29점 중 19.7점의 지식도를 보였고, 일반적지식, 전파경로에 대한지식, 예방지식 중 일반적 지식이 가장 높았고 전파경로에 대한 지식이 가장 낮게 조사되었다. 2. 조사대상자의 AIDS에 대한 태도는 100점 환산하여 64.5점의 긍정을 보였고, 그 중 AIDS감염환자에 대한 편견이 있었다. 3. AIDS관련 지식은 AIDS관련 교육횟수, 교육의 도움정도, AIDS관련 정보획득방법, 흡연경험, 음란물접촉경험, 이 성교제경험, 성관계경험에 따라 통계적 유의한 차이를 보였다.(p<0.05) 4. AIDS에 대한 태도는 교육의 도움정도, AIDS관련 정보획득방법, 흡연경험, 음란물접촉경험, 이성교제경험에 따라 통계적 유의한 차 이를 보였다.(p<0.05) 5. AIDS관련 지식과 태도의 상관관계는 흡연경험과 이성교제경험이 있는 학생들에게서 지식의 수준이 낮을수록 긍정적 태도를 보였으며, 음란물접촉경험이 있는 학생들은 지식의 수준이 높을수록 긍정적 태도를 보였으며 통계적으로 유의하였다.(p<0.01) 6. AIDS에 대한 지식과 태도간의 관련성을 살펴보면 일반적 지식과는 0.158, 전파경로에 대한 지식과는 0.161, 예방에 관한 지식과는 0.204로 조사되었고 전체 지식과 태도간의 관련성은 0.198로 통계적으로 유의한 차이가 있었다.(p=.000) 7. 회귀분석 결과 HIV/AIDS에 대한 태도에 영향력이 가장 큰 것은 음주경험(-0.279), 이성 교제경험(0.259), 흡연경험(0.231), 음란물접촉경험(0.180), 예방지식(0.165), 전파경로지식(0.129), 교육도움(-0.125)순이었고 20.7%의 설명력을 가졌다. 고등학생들이 AIDS에 대한 올바른 지식과 감염환자에 대한 편견을 갖지 않도록 많은 교육 시간과 경험적인 학습의 AIDS관련 보건교육이 필요할 것이다.

• Applied Chemistry for Engineering
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• v.31 no.3
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• pp.341-345
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• 2020

An in situ regeneration of activated carbon bed using an ozonated water was studied in order for avoiding the carbon loss, contaminant emission and time consuming for discharge-regeneration-repacking in a conventional thermal regeneration process. Using phenol and polyethylene glycol (PEG) as adsorbates, the adsorption breakthrough and in situ regeneration with the ozonated water were repeated. These organics were supposed to degrade by the oxidation reaction of ozone, regenerating the bed for reuse. As the number of regeneration increased, the adsorption capacity for phenol was reduced, but the change was stabilized showing no further reduction after reaching a certain degree of decrement. The reduction of adsorption capacity was due to the increase of pore size resulting in the decrease of specific surface area during ozonation. The adsorption capacity of phenol decreased after the ozonated regeneration because the in-pore adsorption was prevalent for small molecules like phenol. However, PEG did not show such decrease and the adsorption capacity was constantly maintained after several cycles of the ozonated regeneration probably because the external surface adsorption was the major mechanism for large molecules like PEG. Since the reduction in the pore size and specific surface area for small molecules were proportional to the duration of contact time with the ozonated water, careful considerations of the solute size to be removed and controlling the contact time were necessary to enhance the performance of the ozonated in situ regeneration of activated carbon bed.

• Journal of Digital Convergence
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• v.14 no.10
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• pp.137-145
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• 2016

The explosive growth of social networking services based on smart devices popularize these relationships and activities online in accordance with the far larger impact of this on the real life offline, the interest and importance for the online activity is increasing. In this study, factors affecting the SNS activity are defined by object, user, influence direction, influence distance and proposed a method to measure organic terms in effect between the SNS users. Influence Direction and Influence Strength (or Distance) are elaborated by using the existing influence measurement element such as structured data - the number of friends, the difference between the number of contacts - and the new influence measurement element such as unstructured data - gap between the former time and the latter time, preference and type of response behavior - that occur in social network service. In addition, the system for collecting and analysing data for measuring influence from social network service and the process model on the method for measuring influence is tested by using sample data on Facebook and explained the implementation probability.

• Journal of the Korea Convergence Society
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• v.10 no.12
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• pp.447-451
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• 2019

This study were to investigate the scratches and replacement cycles of eyeglasses according to personal characteristics in daily life. The subjects were 58 people who voluntarily participated in this study. The replacement cycle of eyeglasses according to the contact of eyelashes with eyeglasses, type and the number of eyeglasses wiped on a day were analyzed. The statistical analysis were performed by X² test and Fisher's exact test. The average replacement cycle of the eyeglasses were longer females than males. The eyeglasses replacement cycle were significantly shorter when the eyelashes contacted the eyeglasses and when the eyeglasses were wiped using a tissue or clothes other than the eyeglasses towel. The coating film of the eyeglasses may be damaged by the convergence effect such as eyelashes or minor carelessness in daily life, and this study will continue to follow up on this result.