• Journal of the korean academy of Pediatric Dentistry
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• v.44 no.2
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• pp.154-163
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• 2017

This study aims to investigate the utilization status of dental services by foreign children living in Seoul and their level of satisfaction with the treatments. We developed a structured questionnaire with 35 questions, which comprised 14 questions (demographic characteristics) and 21 questions (oral hygiene and dental experience of the child). In this study, the distribution of nationality of 391 participants differed from the actual statistics in Korea. It consisted of high percentage of participants from African countries (23.6%), as well as North American countries (24.1%). In addition, the education status of most parents was above the level of college graduate. Despite the relatively high socioeconomic status of the participants, they showed minimal dental health knowledge regarding the aspect of oral hygiene. Utilization of dental health services and the types of dental clinics visited by them were similar before and after coming to Korea. The participants showed overall satisfaction with the care, but many of them expressed the need for improvement with regard to treatment fee and communication. In conclusion, foreign children living in Seoul require appropriate dental health education and governmental support to promote regular dental check-ups, to improve their overall oral health, and prevent the incidence of dental caries.

• Journal of the Korean Society for Railway
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• v.20 no.1
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• pp.1-10
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• 2017

Brake squeal noise has been a challenging problems for a long time. It is very annoying to passengers and residents near tracks. Two methods have been applied to reduce or eliminate brake squeal noise. One is to improve frictional materials; the other is to optimize the topology and structures of brake pads. In this study, we developed two kinds of brake pads; one is a pad whose frictional material is different from the KTX brake pad friction material; the other is a flexible pad that has the same frictional material as that of the KTX brake pad, but a different structure. Squeal noise and friction coefficients were measured and analyzed using a full-scale brake dynamometer. It was found that the dynamometer test can simulate the squeal noise of KTX trains at stations. The squeal frequency of the KTX at 4500Hz was exactly reproduced; this value of 4500Hz was one of the natural frequencies of the KTX brake disc. It was also found that the squeal noise depended on the caliper pressure, initial disc temperature and braking speed. The average friction coefficient was 0.35~0.45. The new pad lowered the squeal noise by 17.3~21.6dB(A).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8386-8393
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• 2015

This study is to investigate the needs for the cool motorcycle helmet and the factors affecting the purchasing intention of cool helmet. The convenient sampling from motorcycle clubs were conducted during 5/20/2014~5/28/2014 on Google DAX. As a result, 197 participants were surveyed. The main reasons of sensing unpleasant feeling wearing helmet were identified as 'hot and uncomfortable feeling' and 'it ruins hair style'. The mean score expressed in terms of five point scale showed that the needs for cool helmet was 3.9 and the purchasing intention of cool helmet was 3.6, respectively. The significant factors influencing the purchasing intention of cool helmet were identified as 'the needs for cool helmet' (odds ratio=6.52) and 'extra paying intention for cool helmet' (odds ratio=1.77). The main reasons of sensing unpleasant feeling wearing helmet were similar to the previous research. However, we can expect that the initial target market for cool helmet would be the low end (less than \40,000 of extra paying intention) or the high end (more than \100,000 of extra paying intention). The main contribution of this study is dealing with the topics related to the purchasing intention of the cool helmet.

• Journal of the korean academy of Pediatric Dentistry
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• v.26 no.3
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• pp.513-519
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• 1999

Chloral hydrate is one of the most widely used sedative agents to control the difficult to treat young age group in the dental clinic. We are often frustrated to see the patient still awake and cry with agitation even after far more than the normal onset time. In such a case, the patient has to be rescheduled for another sedation visit with different agents and/or routes which greatly disappoints the guardians. This case report presents a sedative regimen that can possibly help the clinician complete scheduled treatment without postponement. We have tried sleep induction with Enflurane (1-1.5vol%) for 60 seconds to 37 patients of those who failed to respond properly to the dose(70mg/kg)of oral Chloral hydrate. The average age and weight of the patients was 34.3 months(22-43mo.) and 14.9kg(11-21kg) respectively. It is suggested that sleep induction with low dose Eflurane produced a stable state during dental treatment with respect to vital sign and behavior. Evidence of adverse effect was not detected or reported during and/or after the procedures.

• Annual Conference on Human and Language Technology
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• 1997.10a
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• pp.469-476
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• 1997

본 연구는 한글 전용과 한자 혼용이 글의 이해 속도, 이해 정도, 내용의 기억에 어떤 영향을 미치는 가를 조사하기 위해 실시되었다. 한글 전용론과 한자 혼용론은 각각 나름대로의 논리를 가지고 서로 논쟁을 펼쳐왔다. 먼저 한글전용론의 주장을 살펴보면, 한자는 배우기 어렵고 쓰기도 불편해 쉽게 익힐 수 있는 한글을 사용해야 하며, 한자를 사용함으로 인해서 순 우리말의 발전이 방해를 받고, 글자 생활의 기계화와 출판 문화의 발달에 있어 한자는 이것을 어렵게 한다는 것이다. 반면에, 한자혼용론의 주장에 따르면, 한자말은 한자로 적을 때 그 의미의 파악이 빠르고 정확하고, 우리말 어휘의 절반 이상을 한자어가 차지하고 있으므로 한자를 가르치는 것이 국어교육의 지름길이고, 우리말에는 동음이의어가 많아서 한글로만 적을 경우 그 뜻을 식별하기 어렵고, 한자는 각 글자가 모두 뜻을 가지고 있으므로, 각각을 조합하여 새로운 의미의 단어를 쉽게 만들 수 있음은 물론이고 한글로 쓸 경우 길게 쓰여져야만 하는 것을 짧게 쓸 수 있다는 장점을 가지고 있으며, 한자를 쓰지 않으면 우리의 전통 문화를 이어 받을 수 없으며 한자를 공통으로 쓰고 있는 동양문화권에서도 고립을 초래할 수 있다는 것이다. 이렇게 한글전용과 한자혼용에 대한 의견이 다양한 만큼 우리나라의 한자에 대한 정책도 그 갈피를 잡지 못하고 계속 바뀌어 왔다. 독립이후 정부에서는 법령과 훈령 등으로 모든 공문서에서의 한자사용을 금지하고 일반 사회의 문자 생활에도 한글을 전용할 것을 권고하지만 이 지침은 결국 공문서에만 한정되어 왔고 후에는 이것조차도 유명무실해졌다. 또한 중고등학교의 한자교육 정책도 수차례 변화되어 한글만을 배운 세대가 사회에 나와 여전히 한자가 사용되고 있어 적응에 문제점을 가지기도 하였다. 본 연구에서는 그 동안 계속되어 온 한글과 한잔의 사용에 관한 논쟁을 언어심리학적인 연구 방법을 통해 조사하였다. 즉, 글을 읽는 속도, 글의 의미를 얼마나 정확하게 이해했는지, 어느 것이 더 기억에 오래 남는지를 측정하여 어느 쪽의 입장이 옮은 지를 판단하는 것이다. 실험 결과는 문장을 읽는 시간에서는 한글 전용문인 경우에 월등히 빨랐다. 그러나. 내용에 대한 기억 검사에서는 국한 혼용 조건에서 더 우수하였다. 반면에, 이해력 검사에서는 천장 효과(Ceiling effect)로 두 조건간에 차이가 없었다. 따라서, 본 실험 결과에 따르면, 글의 읽기 속도가 중요한 문서에서는 한글 전용이 좋은 반면에 글의 내용 기억이 강조되는 경우에는 한자를 혼용하는 것이 더 효율적이다.

• Journal of Elementary Mathematics Education in Korea
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• v.21 no.2
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• pp.291-308
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• 2017

In 1946, many native korean mathematical terms are coined newly by the ministry of education of USAMGIK(the United States Army Military Government in Korea) through referring to the opinions of various circles. In native korean mathematical terms created at the time, many of them are coined, either by using native korean words corresponding to the meaning of chines characters, or by abbreviating newly coined native korean mathematical terms. However, in less than 20 years, about half of native korean mathematical terms made in 1946~1947 has been went back to chines character mathematical terms, and most of those chines character mathematical terms has been used up to now from then. Although, in the teaching and learning of mathematics, the discomfort of chinese characters mathematical terms is pointed out and it is claimed that the use of native korean mathematical terms is helpful, it is not everything to hurry to use native korean mathematical terms. Attempts to convert chinese characters mathematical terms into native korean mathematical terms should be prudent. When a certain native korean mathematical term is used, if it must be used only because it is a native korean mathematical term, then the term has no choice but to fail. In this paper, we propose the following three implications as conclusions for the successful use of native korean mathematical terms in this viewpoint. First, attempts to coin native korean mathematical terms should be continued. Second, it is necessary to identify the survival power of well-preserved native korean mathematical terms. Third, it is necessary to identify the failure factors of native korean mathematical terms which does not survive today.

• Journal of Chest Surgery
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• v.38 no.8 s.253
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• pp.570-575
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• 2005

Background: Video-assisted thoracic sympathicotomy plays an important role as an effective method for the treatment of axillary hyperhidrosis. People with axillary hyperhidrosis were not satisfied by the occurrence of the high rate of disabling compensatory hyperhidrosis and axillary resweating. Therefore, by comparing and assessing the clincal results according to the level and extent of sympathicotomy in axillary hyperhidrosis, we aim to determine which method will result in maximal benefits. Material and Method: Among 70 patients suffering from axillary hyperhidrosis having undergone thoracoscopic sympathicotomy from January 2001 through December 2003, 57 patients who responded to either telephone interview or questionnaire were included in the current study. The patients were divided into two groups, Group 1 (n=25): patients having undergone R3, 4, 5 sympathicotomy which consist of blocking the interganglionic neural fiber on the third, fourth, and fifth rib, Group 11 (n=32): patients having undergone R3,4 sympathicotomy which consist of blocking the interganglionic neural fiber on the third and fourth rib. The study parameters were satisfaction rate and degree of compensatory sweating. Result: There was no difference on age and sex, family history, combined hyperhidrosis, and mean follow up month between the two groups. Patients expressing satisfaction were $88.0\%$ in group and $56.3\%$ in groups 11 with statistically significant difference (p=0.02). Moderate to severe compensatory sweating were $52.0\%$ (embrassing 6 patients, disabling 7 patients) in group 1 and $62.5\%$ (embrassing 5 patients, disabling 15 patients) in groups 11 with no significance in the statistical analysis. Conclusion: R3, 4, 5 sympathicotomy was an effective means of treating axillary hyperhidrosis because of higher long term satisfaction rate.

• Journal of radiological science and technology
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• v.34 no.2
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• pp.97-103
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• 2011

The Full-length examination of the femur sometimes does not show all of the femur because of the limited width in collimator and size of detectors although it is located in the diagonal direction. Aim of this study is to identify usefulness of the method of combining images which obtained from two radiographic images containing the femoral head and condyle respectively. Our group interviewed 30 radiological technologists who used both palliative DR method and SM method in their examinations of the femur of patients who were carried to the emergency rooms in Gwang-ju city from August 2007 to November 2009. We evaluated twenty images according to the contraction of femoral neck, turning of knee joints and inclusion of the femur. The examination were performed by two radiologists and six radiological technologists who have more than ten years of career. The results are as follows: SM method was graded with higher score for examination time, number of examiners, emaciation, retake and patients' discomfort (p< 0.001) while the. SM method was scored higher than the palliative DR method in the palliative DR method for examination of long bone.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.11
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• pp.106-114
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• 2019

This study aims to identify the effects of experiencing health promotion education on the present health status of elderly people. The subjects of this study were a total 10,532 elderly people (aged 65 years or older), and who were selected from the data of the '2017 Community Health Survey'. The health promotion education experience consisted of handwashing education/campaign, a non-smoking campaign and non-smoking education. The chronic disease control education experience consisted of education on hypertension, diabetes mellitus and arthritis. Psychiatric counseling consisted of consultations on stress, depression and suicide. The present health status consisted of the patients' ability to exercise, their self-care ability, their activities of daily living, their pain/discomfort and their anxiety/depression. The data was analyzed utilizing the chi-square test, the Mann-Whitney test and multivariate logistic regression analysis. The general characteristics of the subjects were 4,075 males (38.69%) and 6,457 females (61.31%). The average age was 73.71(±6.18) years old. The significant factors influencing the elderly peoples' present health status were age (OR=0.909, 95% CI=0.886-0.933), handwashing education/campaign (OR=2.463, 95% CI=1.703-3.563), a stop smoking campaign (OR=1.624, 95% CI=1.146-2.301) and consultation for mental problems (OR=0.533, 95% CI=0.359-0.791). In conclusion, to modify the personal habits that the elderly have had for a long time and to show the effects of education, long-term continuous education that focuses on the characteristics of the people will be effective.

• Journal of Korean Library and Information Science Society
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• v.49 no.3
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• pp.55-75
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• 2018

The purpose of this study is to identify characteristics of secondary school teachers' perceptions and experiences of school libraries and to suggest strategies for its' activation. In order to achieve this aim, the questionnaire survey was conducted for 229 secondary school teachers who participated in K university qualification training in 2017. As a result, they recognize that school libraries are an essential facility and that continuous support and investment are needed. They think that the effectiveness of the school library is very helpful for creating a leisure and cultural life and for stimulating reading atmosphere and education, and this perception is stronger at lower ages. The number of school library use of them is as low as once a month, and the purpose of use is mainly for cultivation and leisure. The discomfort of the school library is mostly due to lack of materials and space for them. In particular, they have a lack of knowledge and necessity about the method of library-based instruction and insufficient preparation time and poor materials. Teachers are highly aware of the need and utility of training, and prefer training with peers. Therefore, it is necessary to develop strategies such as remodeling space and increasing collections for their study and instruction, and foster peer supervision so that they can actively utilize school library in subjects management.