• Journal of the Microelectronics and Packaging Society
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• v.8 no.1
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• pp.5-11
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• 2001

Melting behavior and bridge phenomenon of solder paste, which is essential for surface mount technology in pachaging, were investigated. Solder paste of Sn-37%Pb was printed on Cu-pattern of PCB, and heated over melting point. Melting behavior of the paste was observed using CCD-camera. In order to modelize the melting and agglomeration phenomena of paste, two solder balls of 0.76 mm diameter were used. As experimental results, the paste start to melt from the margin of the printed shape. The height of the melted paste decreased from 270 $\mu\textrm{m}$ to 200 $\mu\textrm{m}$ firstly, and finally recovered to 250 $\mu\textrm{m}$ During the melting procedure, pores were evolved from the molted paste. Concerning melting model of solder ball, relationship between contact area of solder ball and soldering time was derived as $\chi^2/t=4r \; \gamma/\eta=7.56 m^2$/s at $280^{\circ}C$.

• The Korean Journal of Emergency Medical Services
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• v.10 no.2
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• pp.63-76
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• 2006

This study was designed to get basic data about AIDS educational program development of students of university, especially for students of the department of Emergecy Medical Technology. The objective of this study was to identify the level of AIDS related Knowledge and Attitude of freshmen of university. The subject for this study consisted of 2022 male and female students who entered in 2005to Gongju National university in Chungnam province. Data was colledted by self-reporting questionaire consist of 66 items on 20th, February, 2005. The findings of this study can be summarized as follows. 1) The mean overall knowledge score was estimated to be 70.22%. 2) The knowledge score about definition of AIDS was high(93.2%). but knowledge score about progression and incubation period was low(48%). 3) AIDS related knowledge about diagnosis with blood was was high(91.2%), but those about period of antibody formation was relatively low(66.2%). 4) The score about latent appearance of AIDS-related symptoms was hlgh(93.7%), but those of apprehension of individual symptom was very low(57.5%). 5) Percentage of correctly answered respondent about transmission with needle and transfusion was very high(>94%), but the score of transmission through the anal and oral sex was relatively low(75-79%). 6) The knowledge score about prevention with condom was high(89.5%), but misconception of disinfection and vaccination was also high. 7) Acknowledgement about utility of consultation, information, treatment was very low (10-17%). In the end, the study concludes that it is necessary to develop comprehensive AIDS education programs to improve knowledge about the disease as well as to allay the fears and anxiety of the contact.

• The Journal of Korean Academic Society of Nursing Education
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• v.19 no.4
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• pp.518-530
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• 2013

Purpose: Purpose: The purpose of this study was to provide basic data to develop sexual abuse prevention educational programs for elementary school students. Method: Ninety three third, fourth, fifth, and sixth grade elementary school students were interviewed for content analysis on sexual abuse. Results: The content recognized by elementary school students about sexual abuse was as follows: 1) The concepts of sexual abuse were 'compulsory contact', 'harassment', 'school violence', 'pornography', 'unpleasant sexual behavior' 'crime', and 'don't know'. 2) The causes of sexual abuse were 'intolerance of impulse', 'play', 'bullying', 'financial needs', 'home education and the environment', 'negligence of the victim', and 'don't know'. 3) The methods how to prevent and deal with sexual abuse were 'sexual education', 'avoidance of danger', 'protection', 'self-assertion', 'treat with kindness', 'strengthening of penalties', 'asking for help and notification', 'report', 'treatment and counselling', 'escaping', and 'don't know' 4) Educational needs for prevention of sexual abuse were 'more detailed sexual abuse prevention education', 'how to recognize sexual abuse', 'how to protect oneself', 'interpersonal relationship', 'practical education', and 'none'. Conclusion: These results suggest that based on elementary school students' recognition of sexual abuse, a sexual abuse prevention educational program and content should be organized.

• Journal of the Korea Convergence Society
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• v.8 no.10
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• pp.167-172
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• 2017

The purpose of this study is to analyze the emotional codes of Sijo, which has been acknowledged to have excellent therapeutic function, to activate the contents of the therapy of humanities. Sijo as a function of healing forms emotional codes of therapy, which is the total of emotions, through the fusion of emotions formed during the process of appreciation of various works. This process enables the literary therapeutic activities to proceed physiologically in the human body. Just as machine learning is self-learning by cognitive functions, the coding process for encoding and re-encoding at all times operates on collections of numerous neurons in the human system. In such a process, it is predicted that amino acids are synthesized in the human body by collective encoding of emotion codes. These amino acids regulate the signaling system of the human body. In the future, if the study on the healing process as such at the contact point of humanities and human physiology proceeds, it is expected that a program of higher quality humanistic therapy will be activated.

• Journal of Korean society of Dental Hygiene
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• v.16 no.2
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• pp.185-193
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• 2016

Objectives: The purpose of the study was to examine the recognition and satisfaction of dental care customers after 1 year national health insurance coverage of dental scaling. Methods: A self-reported questionnaire was completed by 477 dental care customers in Gyeongbuk, Busan, Yangsan, and Gyeonggido from July 18 to September 30, 2014 after receiving informed consents. The questionnaire consisted of general characteristics of the subjects(5 items), subjective awareness of oral health(4 items), recognition of scaling(5 items), and recognition and satisfaction of scaling health insurance(5 items). Data were analyzed using SPSS version 20.0 program. Results: Those who recognized the national health insurance coverage of dental scaling accounted for 80.1 percent and 47.2 percent of them got the health insurance coverage via media advertisements. Those who received the scaling service by health insurance coverage accounted for 73.8% and 66.2% of them were very satisfied with the service. Among the customers, 91.8% were satisfied with scaling health allotment. There was a statistical significance between scaling health insurance and subjective oral condition recognition(p<0.01). Through the health insurance coverage scaling service, the oral health in Korea will improve much. Conclusions: The expansion of health insurance coverage of scaling service will provide the universal oral health care for all people. Owing to low cost service, people will actively try to come in contact with public health service in the future.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.6 no.3
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• pp.544-558
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• 1999

With the increasing incidence of AIDS, it is probably inevitable that nurses working in hospital and community settings will come in contact with patients with AIDS. Nurses, more than any other health care profession, are on the front line of AIDS patient care. The purposes of this descriptive study were to gather information about registered nurses' knowledge and attitude regarding AIDS. and to provide a basis for the development of continuining education programs for the nurse. Data was gathered in 1988 using self-administered questionnaires given to a convinience sample of two hundred seventy registered nurses from two university hospitals, school nurses and postgraduate students of nursing. Data was analyzed with SAS. The results were as follows. Above 90% of the nurse knew well about definition of AIDS and routes of transmission but nurses relatively lacked knowledge about transmission of HIV in breast milk(69.3%). Less than half knew that drug abuser(44.1%) and sexual partner with IV drug abuser(39.6%) are at high risk for contracting AIDS. Above 70% of the nurse showed reluctance to provide care for surgery. delivery of child birth and hemodialysis of patients with AIDS. The results showed that, given a choice. 41.7% of the nurse would refuse to care for AIDS patients and 48.3% claimed that they should have a right refuse to care for AIDS patients. Reluctance of nursing patient with AIDS appeared to be principally associated with general fear of becoming infected with HIV. 41.8% exhibited a sympathetic attitude toward individual AIDS patient. The study findings suggest that it is necessary to examine the correlations between knowledge and attitude and to develop continuing education programs that alleviate the fear of contagion of the nurse.

• Proceedings of the Korean Vacuum Society Conference
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• 2014.02a
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• pp.429.2-429.2
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• 2014

ZnO nanowire is known as synthesizable and good mechanical properties. And, stimuli-responsive polymer is widely used in the application of tunable sensing device. So, we combined these characteristics to make precise tunable sensing devise. In this work, we investigate the dependence of ZnO nanowire alignment and morphology on si substrate using nanosphere template with various conditions via hydrothermal process. Also, pH-temperature dependant tuning ability of nanostructure was studied. The brief experimental scheme is as follow. First, Zno seed layer was coated on a si wafer ($20{\times}20mm$) by spin coater. And then $1.15{\mu}m$ sized close-packed PS nanospheres were formed on a cleaned si substrate by using gas-liquid-solid interfacial self-assembly method. After that, zinc oxide nanowires were synthesized using hydrothermal method. Before the wire growth, to specify the growth site, heat treatment was performed. Finally, NIPAM(N-Isopropylacrylamide) was coated onto as-fabricated nanostructure and irradiated by UV light to form the PNIPAM network. The morphology, structures and optical properties are investigated by FE-SEM(Field Emission Scanning electron Microscopy), XRD(X-ray diffraction), OM(Optical microscopy), and WCA(water contact angle).

• Textile Coloration and Finishing
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• v.30 no.1
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• pp.9-19
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• 2018

To prepare bio-inspired antifouling coating materials having similar structure with lotus, self-crosslinkable waterborne polyurethanes emulsions containing paraffin wax (CWPU/P0, 0.25, 0.5, 1.0, 1.5, 2.0, the number indicated the wt% of wax) were prepared by an emulsifier-free/solvent free prepolymer mixing process. The as-polymerized CWPU/P emulsions containing 0 - 1.00wt% of paraffin wax were found to be stable after 4 months, however, CWPU/P emulsions containing 1.50 and 2.00wt% of paraffin wax were unstable within 1 month storage. Considering the stability of emulsions, the optimum paraffin wax content was found to be about 1wt% to obtain stable antifouling coating emulsion material. The surface topology of CWPU/P film samples was characterized by atomic force microscopy (AFM). This study examined the effect of paraffin wax content on the surface roughness, water contact angle/surface energy, water swelling, light transmittance and tensile properties of CWPU/P film samples.

• Journal of Korean society of Dental Hygiene
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• v.14 no.1
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• pp.9-15
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• 2014

Objectives : The purpose of the study was to investigate the influencing factors of major and university choice in the changing environments that kick out the insincere universities keeping pace with the national policy. Methods : A self-reported questionnaire was completed by 177 subjects after receiving informed consents. The questionnaire consisted of general characteristics, influencing factors on university and department choice including multiple application. Chi-square test was used for analysis of the difference between early and regular admission. Results : Employment was the most important reason for choice of dental hygiene department that accounted for 96%. The access route for university information was college homepage for entrance information that accounted for 72.3% and 76.3% of applicants were advised by their parents for their choice for university. The information was mainly composed of school life(92.1%) and employment (81.9%). The applicants wanted to meet the students(58.8%) and to come in contact with the university homepage(57.1%). Early and regular applicants differed in reasons for college entrance(p=0.032), information delivery for major(p=0.013) and multiple application for entrance(p<0.01). Conclusions : University homepage and communication with the students will give much information to the applicants. So the university had better choose the homepage and communication for marketing strategy.

• Journal of Korean society of Dental Hygiene
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• v.9 no.3
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• pp.545-557
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• 2009

Objectives : This study was to investigate the use of mouth-guards and maxillofacial injuries and to examined the relationship among variables in athletes group. Methods : The subjects were 459(86.5%), who were 18 years or older with mean age of 20.7 years. Data was collected using a self administrated questionnaire from May 25 to June 15, 2009. We surveyed maxillofacial injuries(temporo-mandibular disorders contained) and mouth-guards usage and confidence concerning mouth-guards in athletes. The data were analysed with chi-square analysis, fisher's exact test and logistic regression using the SPSS 15.0 windows. Results : Prevalence of body or maxillofacial injuries experiences was 54.5% for athletes and 47.1% for non-athletes groups(p>0.05). The other hand, the incidence temporo-mandibular disorders was 67.0% for athletes and 49.8% for non-athletes groups(p<0.05). The experience of the use of mouth-guards was 83.3% for athletes and 78.8% for non-athletes, there were not significant differences between athletes and non-athletes groups (p>0.05). Risk factors found to be significantly related to the occurrence of maxillofacial injury were: unused mouth-guards(OR=2.83), no rules for use of mouth-guards(OR=2.46). Conclusions : Based on the findings, maxillofacial injuries experience is highly associated with mouth-guards usage, not only athletes also general people should be educated on the use of mouth-guard in order to reduce the incidence of maxillofacial injuries.