• Journal of Digital Convergence
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• v.11 no.11
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• pp.613-620
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• 2013

This study was conducted to measure and analyze the changes in paraspinal muscles of acute and chronic low back pain patients using MRI, and to provide clinical basic data for diagnosis and treatment for low back pain. For this purpose, 20 patients with acute low back pain frome August 2012 to January 2013 which occurred within 12 weeks, and 20 patients with chronic low back pain that progressed over 12 weeks, were chosen as subjects, and their MRI measurements were compared with one another. As a result, in relation to in the fatty degeneration ratio of the left spine and right spine, there were significant differences in erector spinae and multifidus(p<.001), and in relation to the Fat Infiltration ratio between all the groups, there were significant differences in psoas major, erector spinae and multifidus between the acute low back pain patient group and the chronic low back pain patient group(p<.001). In the post-hoc test, multifidus and erector spinae in the acute low back pain group and chronic low back pain group showed the highest Fat Infiltration ratio. The serious Fat Infiltration of multifidus and erector spinae in the chronic low back pain group led to weakened strength of muscles that stabilize the spine. In conclusion, it is considered that this study would present important data and basis in making acute and chronic low back pain patients pay more attention to multifidus and psoas major during rehabilitation exercise, and selecting a rehabilitation exercise program.

• Journal of Digital Convergence
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• v.18 no.10
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• pp.501-507
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• 2020

The purpose of this study is to identify the personal characteristics of college students participating in leisure activities and the impact of their leisure experience on job-seeking Stress, To achieve this purpose, subjects of this study were sampled 264 university students participant using purposeful sampling method for 2 months from september to october of 2019. Using questionnaires stratified cluster random sampling in university students in C city. Studies have shown that first, looking at gender, women receive more academic stress than men. Second, looking at the results of the school year, the first and fourth graders received more personality stress than the second and third graders. Third, if you look at the results of the major category, it turns out that students in the natural major receive more personality stress than in the social major category. In addition, students in the humanities major are more stressed out about the Family environment stress than in the natural major. Fourth, if you look at the results of the allowance, students who receive 400,000 won to 500,000 won and those who receive 100,000 won to 200,000 won or less are under stress from the family environment stress than those who receive 500,000 won or more. Fifth, if you look at the results of your experience in leisure activities, the more experience you have in leisure Therefore, college students will have to lay the groundwork for self-control through various leisure activities for job stress. activities, the lower your job-seeking Stress.

• Korean Journal of Environment and Ecology
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• v.26 no.1
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• pp.113-124
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• 2012

The purpose of this study is to analyze community members' perception due to impacts on use and development of Dulegil in Bukhansan National Park. The study was conducted by questionnaire survey sent to community members of the vicinity of Dulegil. Average score of positive impact on the local community was 3.2. Positive impacts mentioned by community members were 'heightened pride in their community with increased community image' and 'improvement of landscape and natural environment.' Improved residents' awareness of landscape and natural environment indicated that Dulegil almost accomplished intended goal of preservation of ecosystem. However, actual effects on ecosystem preservation and local economy were not perceptible yet. Score of negative impact was 2.8 on average. 'Traffic congestion' and 'increase in noise level' were considered the most serious among the negative impacts. Environmental pollution and destruction of vegetation in the lowland were deemed relatively bad. Regarding resident awareness of community, those in their 50s and older were quite satisfied with the community. However, young people showed lower level of satisfaction. In order to satisfy all ages, infrastructure and programs for the youth should be in place. To minimize negative awareness of impacts of Dulegil, visitor's attitude should be changed, and education and training on the value and mind set of horizontal hiking are required.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.11
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• pp.1721-1725
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• 2010

This paper reports the fabrication of geometry-controlled carbon microneedles by a backside exposure method and pyrolysis. The SU-8 microneedles are a polymer precursor in a carbonization process, which geometries such as base diameter, spacing, and aspect ratio can be controlled in a photolithography step. Using this fabrication method, highly reproducible carbon microneedles, which have high aspect ratios of more than 10 and very sharp nanotips, can be realized. The quartz surface with carbon microneedles becomes very hydrophilic and its wettability is adjusted by carrying out the silane treatment. In the carbon microneedle array ($3\;{\mu}m{\times}3\;{\mu}m$), the contact angle is extremly enhanced (${\sim}180^{\circ}$); this will be advantageous in developing low-drag microfluidics and labs-on-a-chip as well as in other bio-applications.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1977.06a
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• pp.6.1-6
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• 1977

Among the various audiometric test batteries, pure tone and speech audiometry was carried as routine. During the past 20 years, there have been works on speech word list for Korean language. As a preliminary work for standardization of Korean speech word list, the authors are intended to study on the factors of test methods with these proposal speech word lists. Now, authors has studied as followings methods and materials and the results were obtained as followings. A. Materials and Methods a. Word List 1. Paik Chun Kee (Paik) 2. Soh Jin Myoung (Soh) 3. Cynn Kyu Shik (Cynn) 4. Lee Jong Dam (Lee) 5. Hahm Tae Young (Hahm) b. Test Method 1. ascending 2. descending c. Test Material 1. live voice 2. Recorded male voice 3. Recorded female voice B. Results 1. Score of ascending method was better result than descending method. 2. Speech reception threshold and discrimination score were better in recorded female voice, live voice and recorded male voice in that order. 3. Speech reception thresholds among tested word lists were Hahm, Lee, Soh, Cynn and Paik in that order. 4. Discrimination score was highest with Cynn and Lee, Soh, Hahm, Paik in that order.

• Journal of the Korea Society of Computer and Information
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• v.16 no.11
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• pp.245-253
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• 2011

Due to the imprudent spending of the fossil fuels, the environment was contaminated seriously and the exhaustion problems of the fossil fuels loomed large. Therefore people become taking a great interest in alternative energy resources which can solve problems of fossil fuels. The wind power energy is one of the most interested energy in the new and renewable energy. However, the plants of wind power energy and the traditional power plants should be balanced between the power generation and the power consumption. Therefore, we need analysis and prediction to generate power efficiently using wind energy. In this paper, we have performed a research to predict power generation patterns using the wind power data. Prediction approaches of datamining area can be used for building a prediction model. The research steps are as follows: 1) we performed preprocessing to handle the missing values and anomalous data. And we extracted the characteristic vector data. 2) The representative patterns were found by the MIA(Mean Index Adequacy) measure and the SOM(Self-Organizing Feature Map) clustering approach using the normalized dataset. We assigned the class labels to each data. 3) We built a new predicting model about the wind power generation with classification approach. In this experiment, we built a forecasting model to predict wind power generation patterns using the decision tree.

• Journal of the Korea Society of Computer and Information
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• v.17 no.6
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• pp.201-209
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• 2012

This study was conducted in order to empirically analyze factors affecting the quality of life in the elder resulting from the use of elderly leisure facilities in the community. For this purpose, we surveyed the elder using the senior health town of Gwang-ju Metropolitan City to see whether the quality of life in the elder is influenced by factors such as facilities' environment within the health town, the capacity for the staff and instructors, and the elders' satisfaction with programs. The results of this study are expected to provide practical solutions for enhancing the quality of life in senior users. The survey was performed with 1,038 elders aged over 60 who were using the senior health town of Gwang-ju Metropolitan City by using a self-administered questionnaire and being interviewed with surveyors. The period of the survey was from the 10th to 15th of December, 2010. According to the results of this study, variables affecting the elders' quality of life were academic qualification (B= .074, p<0.05), instructors satisfaction (B=.172, p<0.001), staff satisfaction (B=.104, p<0.01), and facilities and environment satisfaction (B=.217, p<0.001). That is, the lower academic background they have, the higher instructors', staff's, facilities and environment's satisfaction are, the quality of life in the elder was positively affected. In particular, facilities and environment's satisfaction show a relatively high effect and this suggests the necessity to modernize cultural and leisurely facilities in community for senior citizens and create pleasant environment in order to improve the quality of life in the elder.

• Journal of Oral Medicine and Pain
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• v.23 no.3
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• pp.289-294
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• 1998

본 증례는 측두하악관절의 퇘행성 변화를 보이는 환자에서 악교정 수술의 시행 전에 중심위교합장치를 통해 측두하악관절의 안정화를 유도하고, 또한 골스캔을 이용하여 장치의 치료효과를 평가한 임상증례이다. 환자는 24세의 여성으로 5년 전부터 전치부 개교합이 발생되기 시작하였고, 고형식 저작시 좌측 전이부에 간헐적인 통증이 발생한다는 주소로 본원에 내원하였다. 임상검사상 촉진시 양측 관절낭 후방부에 압통을 호소하였으며, 각각 50, 45mm의 최대개구량 및 최대무통성 개구량을 보였다. 좌측 악관절부에서 단순 관절 잡음, 우측 악관절부에서 염발음이 청취되었으며, 저항검사 및 부하 검사에서는 특기할 반응을 보이지 않았다. 약 7mm의 전치부 개교합의 소견을 보였으며, 파노라마 사진과 횡두개 방사선 사진 소견상 양측 과두의 크기 및 하악지의 높이가 다소 작은 소견이 관찰되었고 자기공명영상 소견상 양측성 비정복성 관절원판의 전방전위가 관찰되었다. 1997년 10월 27일 첫 번째 골스캔 소견상 양측성 비정복성 관절원판의 전방위가 관찰되엇다. 골스캔의 전방 사진에서 Densitometer를 이용하여 좌, 우측 과두부위와 상악 골부위의 가장 어두운 부분의 흑화도를 측정하였다. 각각 3회씩 구하여 평균을 구하고 좌, 우측 과두 대 상악골의 흑화도의 비율을 계산하였다. 첫번째 골스캔의 평균 흑화도는 우측 과두, 좌측과두, 상악골이 각각 0.88, 0.81, 1.32 였다. 1997년 11월 4일 중심위교합장치를 장착하였고 지속적인 물리치료를 시행하였다. 1997년 12월 10일 두 번째 골 스캔을 평균 흑화도는 우측 과두, 좌측 과두, 상악골이 각각 0.33, 0.37, 088 이었다. 1998년 1월 30일 세 번째 골스캔 소견상 두 번째 골스캔과 비교하여 활성도가 감소된 소견을 보였다. 임상검사시 무통이었다. 1998년 2월 25일 술 전 교정 위해 중심위교합장치의 장작을 중지시켰다. 1998년 6월 5일 네 번째 골스캔 소견상 이전 검사들과 비교시 흡수가 감소된 소견을 보였다. 네 번째 골스캔의 평균 흑화도는 우측 과두, 좌측 과두, 상악골이 각각 0.24, 0.19, 0.85 였다. 현재 지속적인 관찰 중이며 본원 교정과에서 악교정수술 위한 술 전 교장을 시행중이다. 결국 첫 번째 골스캔의 과두 대 상악골의 평균 흑화도의 비율은 우측과 좌측이 각각 0.66, 0.61이었고 두 번째 골스캔에서는 우측과 좌측이 각각 0.37, 0.42였고, 네번째 골스캔에서는 우측과 좌측이 각각 0.28, 0.23 이었다. 각 골스캔의 과두 대 상악골의 평균 흑화도의 비율 사이에 유의한 차이가 있는지 검증하기 위해 Standard t-test 와 ANOVA를 시행하였다. 이상의 결과에서 첫 번째, 두 번째, 네 번째 골스캔으로 갈수록 좌, 우측 과두 대 상악골의 흑화도의 비율이 유의하게 감소했음을 알 수 있었다. 결론적으로 본 증례에서는 전치부 개교합이 발생되어 악교정수술이 필요한 환자에게 측두하악관절의 안정화를 위해 중심위교합장치를 사용함으로써 퇴행성 관절질환의 진행을 억제시킬 수 있고, 퇴행성 관절질환의 활성도에 대한 평가시 골스캔이 유용할 수 있음을 보여주었다고 사료된다.

• Journal of dental hygiene science
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• v.16 no.1
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• pp.45-52
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• 2016

The purpose of this study was to examine the impact of the self- perceived stress of high school students on their oral health care and the relationship between stress and oral health care. The subjects in this study were the students in four different high schools located in Chungcheongnam-do, on whom a self-administered survey was conducted. The answer sheets from 939 respondents were analyzed by PASW Statistics ver.18.0 for Windows. The girls were more stressed than the boys about their studies, appearance and material resource, and the sophomores felt more stress about their home and studies. The group whose academic achievement was good in the past semester had the lowest stress about home and material resource, and the group whose economic standard was higher were less stressed about appearance and material resource. As a result of comparing their oral health care by general characteristics, the groups who were sophomores and whose academic achievement was good in the past semester were most excellent in that regard, and the students whose economic standard was higher and whose average weekly allowances were larger took better care of their oral health. Concerning the influential factors for oral health care, stress about peer relationship was positively related, and stress about material resource was negatively related. Given the findings of the study, the development of oral health care programs that include how to relieve stress is required, and more intensive education is necessary as well. Besides, education for school personnel in charge of student health management and the development of related manuals are both required.

• Journal of dental hygiene science
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• v.16 no.1
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• pp.1-8
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• 2016

The purpose of this study was to find the attitude change for snack by military soldiers before and after entering military service. To investigate oral health status and improving activities, this survey was done for 318 soldiers at Gyeong-gi province Paju city and the results were as follows. After entering military service, the soldiers take more snacks than before and take snacks 2 or more times a day. Both smokers and non-smokers take more snacks after entering military service than before entering. The soldiers did not go dental clinic regularly. But they have lots of interests about oral health. As higher position and older, soldiers restrain themselves to taking sugar contained food, and the elder soldiers showed higher practical character for nutrition intake than younger soldiers. Private soldiers were least practical for brushing after meal and showed the highest level of fulfill for using fluoride contained toothpaste, regular scaling and checkup at dental clinic and flossing.