• Journal of dental hygiene science
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• v.9 no.2
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• pp.211-217
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• 2009

The purpose of this study is to investigate into company workers' general characteristics and their awareness or oral health examinations. Answer sheets for questionnaire for 267 industrial workers at Changwon city, Korea, were collected and analyzed using SPSS 12.0. Among workers who haven't visited a dental clinic for last one year, 75.6% of them didn't have dental caries. 74.0% of workers who haven't received dental scaling didn't have dental caries. 84.4% of workers who thought of themselves as having good oral health had good oral health and none of them had dental caries. 9.1% of people who had dental caries of 4 or more had bad breath. 73.4% of workers didn't need to treat dental caries, while scaling in 57.7% of them was required. To reform and improve of the system, incremental dental health care system for industrial workers is needed. Oral health education is needed to increase the motivation of industrial workers to control their basic disease.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.722-725
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• 2006

Studies on the ways to construct agreeable sound-amenity have been processed in Korea recently and Virtual Acoustics Field Simulation System (VAFSS) which is an active acoustics reproducing system has been made as a technique to realize the results of the study. This system catches the changes of surroundings and produce sounds which go well with the mood of the space. The fact that a man thinks a sound goes well with factors of the environment should be an individual evaluation. Thus, the standards to classify factors influencing the preference of the sound, which can be judged by the environment, are needed. This study suggests the standards of factors to provide agreeable sound for people according to changes of the time and other elements. Among the factors influencing environment, the temperature, the humidity and the wind were suggested as standards of discomfort Index and wind chin temperature. Besides, only the intensity of illumination has been chosen to estimate the intensity of radiation as a part of factors of the whether.

• Journal of Labour Economics
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• v.24 no.3
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• pp.13-38
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• 2001

The question about whether a shorter workweek may increase employment has been a serious issue and been furiously debated among collective bargainers. The advocators recommend publicly that a reduction in standard working hours will provide benefits to the unemployed through the provision of new jobs, and also can improve the quality of life workers. The opponents argue that a shorter workweek will increase labor costs and induce firms to reduce their production levels, and consequently cut back their demand for labor. Although the debate is still continuing, considerable has been made toward achieving the goal workweek reduction. The analytical framework of this paper is a Putty-clay-model, in which the short-and long-term impacts of changes in working time on the employment associated with the interrelations of wages, prices, hourly labour productivity, the firm's labor demand, business cycle and economic growth etc. must be analyzed.

• Journal of Convergence for Information Technology
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• v.11 no.10
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• pp.131-137
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• 2021

The aim of the study was to observe the influence and related mechanism of histamine and its analogues used for hypersensitivity tests and used as an indicator of impurities in drugs on the tissue-specific intestinal contraction. Intestinal contraction includes the activation of thick or thin filament regulation. However, there are few reports addressing the question whether this regulation is involved in histamine-induced regulation. We hypothesized that histamine plays a role in tissue-dependent regulation of intestinal contractility. Denuded ileal/colonic longitudinal and circular muscles of male rats were used and isometric contractions were recorded using a data acquisition system. Interestingly, histamine alone didn't increase the contraction of the circular muscle but increased the contraction of the longitudinal muscle. Histamine together with atropine (M3 receptor antagonist) didn't inhibit the contraction of the longitudinal and circular muscle. Therefore, histamine alone and together with atropine increases the ileal longitudinal muscle contraction suggesting that additional mechanisms (decreased receptor density, postreceptor signaling or distribution of agonists) might be involved in the regulation of ileal muscle contractility. In conclusion, histamine and/or atropine has some effect on the regulation of the longitudinal contractility regardless of M3 receptor and the simpler test would be preferred as the drug impurity test compared to more complicated tests.

• Food Science of Animal Resources
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• v.24 no.4
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• pp.342-348
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• 2004

To evaluate the sensory characteristics of domestic or imported chilled and frozen pork butts, six samples were purchased and investigated. Sixty panels of sensory evaluation were consisted of six groups by sex and age. In the appearance test, many panels preferred the domestic frozen butt A obtained good scores in fat color and fat attachment (p<0.001). In the age group, the 20's consumer preferred the domestic chilled pork butt of A company, whereas the 30's and 40's consumers preferred the imported frozen butt of A company. According to the results from the triangle test, the combinations of domestic frozen butt B and imported frozen butt A was the most significantly distinguished among the pairs of raw and cooked butts.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.6
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• pp.291-299
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• 2016

Recently, the knowledge industry center has played a role as a facility that creates economic added value because of the high-tech companies related to the knowledge industry, information, and communication. On the other hand, support facilities that are provided in the knowledge industry center are meant to support the company in the center and improve the working conditions of laborers. On the other hand, the support policy established by the government applies to some companies, and none of the support policy is carried out in supporting facilities in the knowledge industry center. In this study, multiple analysis was performed, focusing on the support facilities in the knowledge industry center that aims to improve the working environment of laborers. This study suggests the introduction of guidelines to secure adequate area, depending on the type of supporting facilities in the Knowledge Industrial Center. The sharing of facilities, such as cultural and commercial use for Knowledge Industrial Center, corresponding to poor provision, is recommended. Because the analysis of IPA indicates that the area of commercial support facilities are higher than others and cultural facilities are more important and preferred, it is necessary to compose support facilities that consider the user's individual characteristics. Facilities impacting the working environment need to be planned carefully through a district unit plan at the initial stages of development, thus assisting the production activity of workers.

• Korean Journal of Environment and Ecology
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• v.13 no.3
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• pp.280-287
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• 1999

본 연구는 우리나라 특산식물인 히어리 군락이 지리산 국립공원 동부지역에 대규모로 분포하고 있는 것을 처음으로 발견하여 군락지의 분포 및 맹아지 특성 그리고 군락의 보호대책을 위한 기초자료를 축적하고자 수행되었다. 각 계층별 중요치는 교목층에서 소나무(134.15) 일본잎갈나무, 산벚나무, 비목나무, 신갈나무 등이 우점하였고 아교목층에서는 히어리, 거제수나무. 비목나무, 졸참나무, 노각 나무 그리고 관목층에서는 히어리가 우점하였으며 그 외에 철쭉꽃, 진달래, 생강나무 등이 출현하였다 그리고 맹아지 특성은 1개 방형구(25m2)에 평균 17.75개의 주간이 형성되고 1개 주간당 맹아지 수는 평균 6.00개 고사지는 2.80개로 조사되었다. 흉고직경급별 분포에서 생장지의 경우 흉고직경 1.0-4.0cm 구간에서 전체의 64.78%를 차지하였으며 대부분 2.0-3.0cm 구간에서 54.74%를 차지하여 히어리 군락의 중심계급이었다 흉고직경 1.0cm 이하의 고사지가 전체의 53.16%를 차지하였는데 이는 근주에서 돋아나는 1년생 맹아지가 대부분 고사하였기 때문이었다 특히 히어리의 번식습성은 실생묘에 의한 번식도 가능하지만 본 조사지에서와 같이 수관이 울폐된 지역에서는 주로 근맹아에 의한 번식을 더 선호하는 것으로 나타났다.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.15 no.4
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• pp.253-268
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• 1993

The author studied on the 109 cases of ameloblastoma which had been diagnosed with biopsy during the period of 1962 to 1992 at the Kyungpook National University Hospital, Kyemyung University Hospital, Youngnam University Hospital, Catholic Medical School Hospital, Pusan National University and Maryknoll Hospital. This study contains the statistical analysis of the treatment method according to the clinicopathological findings such as sex, age, location, chief complaints, duration, radiographic findings, size and recurrence. The results were as follows : 1. The incidence rate was 59.7% in male and 40.3% in female. 2. At the time of diagnosis, the age of the patients ranged from 9 to 69 years(average 31.4years). The cases of 72.4% were in the 2nd, 3rd, and 4th decades of life. 3. The majority of cases occurred in the mandible 88.9%, especially in the mandiblar angle area 57.8%. 4. The most prevalent chief complaints was swelling 58.7%. 5. As regards duration, the cases less than 1 year appeared 49.5% and average duration is 31.34months. 6. Unilocular type showed 43.1% and multilocular type appeared 56.9%. 7. Conservative treatment was performed 39.4% and radical treatment was employed 60.6%. 8. There were variations of lesional sizes between 2.0cm and 15cm(average 6.26cm). 9. The recurrence rate is 29.4%. 10. The frequency of treatment was not in association with sexes, locations, chief complaints and sizes. 11. Radical treatment was performed more frequently in cases of older age group(above 20 years old), multilocular cases, above average duration(31.34 months) group and recurrent cases (P<0.05).

• The Journal of the Korea Contents Association
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• v.13 no.2
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• pp.348-358
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• 2013

This study aimed to investigate the effect of a lap board that was developed to prevent musculoskeletal disorders caused by the use of a computer mouse. Study participants were 10 college students in their 20s who did not have any musculoskeletal symptoms. We analyzed the difference in upper limb movements, electromyographic activity, task performance, and subjective discomfort between 2 conditions: use of a mouse with the lap board and use of a mouse placed on a desk. Results of behavior analysis showed that there was a significant difference between the 2 conditions in terms of the average angle of shoulder flexion, shoulder internal rotation, and forearm pronation(p< 0.05). However, electromyographic activity, task performance, and subjective discomfort showed no significant differences between the 2 conditions. When subjects used the mouse with the lap board, their upper extremity was located much closer to the torso than when they used the mouse placed on the desk. Six of 10 participating students preferred the lap board. We expect that advanced research on prevention of musculoskeletal disorders due to the use of the computer mouse will be conducted in the near future.

• Journal of Yeungnam Medical Science
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• v.23 no.2
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• pp.240-246
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• 2006

A microdebrider is increasingly used in endoscopic sinus surgery. Although it has many advantages over conventional instruments, it has been associated with severe complications. We treated a case of rupture of the left medial rectus muscle after use of a microdebrider during endoscopic sinus surgery in a 50 year-old female patient who complained of binocular diplopia and exotropia. The patient showed marked limitation on adduction and about 40 prism diopters of left exodeviation. The orbital computed tomography showed a bony defect at the left medial orbital wall, and injury of the medial rectus muscle. The exodeviation was corrected after ophthalmologic surgery. We report a case of the rupture of the medial rectus muscle after use of a microdebrider during endoscopic sinus surgery and review the medical literature.