• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.9
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• pp.244-250
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• 2017

The most important aspect determining the completeness of aprosthesis is itsmarginal and internal fit. Alloysare processed using a softening/hardening heat treatment methodin order to improve their mechanical, physical properties and polishing properties. To examinehow the heat treatment method affects the marginal and internal fit of the Ni-Cr alloy core,thirty dental stone models of the abutment of the mandibular left molar were manufactured.The Ni-Cr alloy coreswere manufactured by the dipping method for the experiment and dividedinto three groups; A for no heat treatment, B for softening heat treatment and C for hardening heat treatment. The marginal and internal fitsof all of the groups were measured by the silicone replica technique. A statistical analysis was performed using one-way ANOVA(${\alpha}=0.05$) in order to examine whether there is a significant difference in the average values of the marginal and internal fits among the three groups and it was found that themarginal fits (1, 6) were significantly different (p<0.05), but the internal fits (2, 3, 4, 5) were not significantly different (p>0.05). These results show that Ni-Cr alloys should not be processed bythe heat treatmentmethod.However, they need to be confirmed in further clinical application studies.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.3
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• pp.489-498
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• 2016

This study examined the effects of internal marketing and customer orientation on the organizational commitment of nurses in specialized hospitals. This research was conducted from May 1 to 30, 2015 and involved 149 nurses at 5 specialized hospitals in Busan, The collected data were analyzed by descriptive statistics, t-test, ANOVA, Scheffe's test, Pearson correlation coefficients, stepwise multiple regression by the SPSS WIN 18.0 program. As a result, there were significant differences in the organizational commitment according to age, marital status, education, clinical experience, position, work shift, working unit, number of beds, and experience of participation for employee satisfaction survey. Organizational commitment was positively related to the internal marketing. In addition, there was a positive correlation between the organizational commitment and customer orientation. Meaningful variables that influenced the organizational commitment were internal marketing, working unit, education, and position. The total explanation power was 58.5% and the internal marketing was the most influential factor. In conclusion, to enhance the organizational commitment of nurses working in specialized hospitals, educational opportunities need to be provided to increase the professionalism of nurses, and efforts will be needed to improve the working environment and develop internal marketing strategies, such as regular satisfaction surveys.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.8
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• pp.287-297
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• 2020

This study examined ways of improving the internal insulation performance of aging university buildings, and to enhance the convenience of occupants in university buildings and the insulation effect of aging buildings. This research was conducted to solve the problem of continuous requests for improving the insulation performance of office workers in the Nehemiah Hall building of Handong University. The results showed that the internal temperature of Nehemiah Hall was low compared to the internal temperature of the adjacent building. Considering the characteristics of the building, the university chose insulating materials under the theme of internal insulation. The experiment was conducted by installing internal wall insulation used in the market by producing a model room that miniaturized the university professor's office. Based on the experimental results, an economic evaluation was conducted to analyze the insulation effect by measuring the heating time and actual heat transmission coefficient. An economic evaluation was conducted by experiment and theory and on a winter and summer basis. According to the research, when an Isopink (30 T) was introduced as an internal insulation material in 60 offices of Nehemiah Hall, it could save up to 1,071,600 won in total during the winter season and 109,200 won during the summer season.

• The Journal of Internal Korean Medicine
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• v.21 no.5
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• pp.729-738
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• 2000

Objective : We examined patients admitted to Dong Eui University Oriental Medical Hospital from 1st January to 31st December in 2000. We studied 110 cases of patients who were diagnosed as Brain stem(pons, mid brain, medullar) infarction with brain CT, MRI scan, MR Angiography. Methods : We analyzed patients into sex, age, onset time, invasion lesion, past and family history, risk factor, abnormal vital sign for early 2 weeks, prodromal symptoms, symptoms at entry, progress and incidental symptoms at acute stage, complications, the state of condition at discharge, demonstrations, herb medications, western and oriental medical cooperation and admission period. Results : Our study was similar to existing studies in the distribution of sex, age, past and family history and risk factors. But there was some differences in the prodromal symptoms, symptoms at entry progress and incidental symptoms at acute stage, and the state of condition at discharge. Conclusions : Our study shows the brain stem infarction patients differed from other cerebrovascular accident patients in the symptoms. We hoped that our study would be further studied in western and oriental medicine.

• Journal of Korean Public Health Nursing
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• v.3 no.2
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• pp.143-156
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• 1989

This study was done in order to analyze the factors which influenced the performance level of urban family planning health personnels' task. Interview survey was done during the period May, 1989. Interviewee were 130 family planning health personnels among total of 140 family planning health personnels in Seoul metropolitan city area. The internal consistency reliability was tested by Cronbach’s Alpha and the construct validity of the survey tool was tested by Factor analysis. Multiple stepwise regression analysis was used to identify major factors influenced to perform family planning health personnels' task. The results of this study were summarized as follows: 1. The internal consistency reliability was high and very significant (Cronbach's Alphs=0.8445, p<0.0000). 2. The construct validity was high and very significant. This analysis was contained 5 factors; registering and keeping of eligible woman records, health educating for FP & MCH, referral for vasectomy and tubal ligation and loop, supplying contraceptive appliances, sending moved-out eligible woman records. 3. Among a total of 15 contents of their functions recording of daily report and monthly report (76.2%), classifying and keeping of records(66.2%), registering of eligible woman records(60.85ti), distribution of leaflets and pamplets(54.6%), counselling & supervision about family planning(53.8%) were actively performed. Sending moved-out eligible woman records(60.8%), health education for community people(49.2%), referring contraceptors' side-effects were poorly performed. 4. The factors which influenced the performance level of urban family planning health personnels' function were age, marital status, educational level, certification, number of residents, number of eligible women, job car-eer, work responsibility, job satisfaction knowledge, position, cooperation of community people, cooperation of Dong Office, cooperation of Health Center. These 14 variables were able to explain job function from 21.4% of follow-up care of contraceptor to 9.1% of classifying & keeping of eligible woman records.

• Journal of Society of Preventive Korean Medicine
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• v.23 no.3
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• pp.31-39
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• 2019

Objectives : The study aimed to investigate the satisfaction, reasons for the progress, and the advantages of the school doctor of Korean Medicine (SDKM) program in the applied Korean Medicine doctors. Methods : The school doctor of Korean Medicine (SDKM) program has been conducted in 21 schools in Seoul since March 2018. The program was varied by school, included the introduction of Korean Medicine, sex education, and anti-smoking/drinking session. This survey was conducted as a paper-based questionnaire after the SDKM. Results : The SDKM results evaluation was better in the Korean doctors who applied for SDKM. The factors for negative progression of SDKM were 'Bad cooperation of the schools', 'Lack of personal capabilities', and 'Lack of motivation'. The factors for the positive progression of SDKM were 'Good cooperation of the schools', 'Support of Seoul Korean Medicine Association'. The question of prerequisites for activation SDKM Program included 'Active cooperation of school', 'Expand teaching materials and programs', 'Support of Seoul Korean Medicine Association'. Conclusions : In order to activate the SDKM, it is necessary to cooperate with the schools, to support of Seoul Korean Medicine Association, and to expand the education program.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.4
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• pp.2460-2468
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• 2014

A local rain that is concentrated in specific area in a short time frequently occurs due to recent abnormal weather. To prevent potential flood disasters, therefore, it is necessary to be established to the flood control system. Checking the river design standard, however, hydrologic design frequency of water gate is only marked as over 20 years, so this fact shows that the standard is unclear. The inland inundation modeling considering the stage in a river and quantitative assessment are required to reduce flood damage. The simulation for internal inundation is very complex and is time-consuming due to considering hydraulic hydrology characteristics at the same time. Using the already established river master plan, consequently, this study proposed the simple and convenient method for assessment of the internal inundation simulation. Using the proposed method in the upper and middle regions of a river, influences for design frequency or water gate location were assessed by applying the nine probability precipitation with design frequency and by targeting the water gates which are installed in five inlands.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.6
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• pp.650-655
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• 2016

In this study, a computational simulation of the internal flow characteristics was carried out for a Urea-SCR Injector. A single hole swirl injector with a swirl disk and slanted nozzle was used in this simulation. The maximum needle lift and opening velocity were selected as the design parameters. To analyze the unsteady internal flow characteristics of the Urea-SCR injector, the moving grid technique was applied to simulate the delicate needle movement. According to the simulation results, the injected mass flow rate from the Urea-SCR injector decreased with increasing needle opening velocity and maximum needle lift. This is because the Urea-solution tends to fill the empty space that the needle previously occupied. The swirl flow is decreased as the flow goes through the injector nozzle, because of the friction with the nozzle wall. Also, during the maximum needle lift period, the swirl coefficient and mean swirl coefficient increase with increasing needle lift. The results of this study may be used as the basic design data of related injectors.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.8
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• pp.3366-3373
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• 2011

In this study, performance characteristics of a water source heat pump system using $CO_2$ as a refrigerant are investigated experimentally. Cooling and heating capacities and COP of the system are analyzed for various system performance variables such as refrigerant charge, expansion valve opening, compressor frequency and internal heat exchanger. Results show that optimum amount of refrigerant charge and expansion valve opening exists at maximum point of COP curve, and cooling capacity increases but COP decreases with the increase of compressor frequency. When the internal heat exchanger is installed, cooling capacity increases about 4.0% whereas heating capacity decreases about 0.89% compared to the case without internal heat exchanger.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.7
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• pp.252-257
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• 2018

In this paper, we propose a mean time to failure (MTTF) to improve the solution for a cryogenic cooler, which is an important part of a cooled thermal device. Common electronic devices have a high possibility of failure due to various environmental factors, such as temperature and humidity. But some special devices (such as thermal devices) are designed to overcome environmental factors. The most affected part of a cooled thermal device's MTTF is the cryogenic cooler. The MTTF of a cryogenic cooler is affected by the device's internal heat. Therefore, if the device's internal heat is reduced, the cryogenic cooler's MTTF increases. From the present device's internal heat simulation, we analyze the improvement method of the device. The proposed improvement method's effectiveness is verified by simulation and MTTF calculation.