• The Journal of Korean Physical Therapy
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• v.12 no.1
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• pp.87-99
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• 2000

A study was conducted in order to determine back pain experience status of elementary. junior and senior high school teachers and the factors affecting their knowledge of back pain and physical therapy from April 2 through June 30, 1999 in major big cities and small and medium towns. Questionnaires were sent to 924 teachers and the collected daa were analyzed. The results summarized are as follows ; 1. $46.3\%$ of the respondents had experienced back pain, and $47.0\%$ of females, $62.0\%$ of the people over 50years old, $57.4\%$ of junior high school teachers, $47.5%$ of teachers of art and physical education, $46.9\%$ of married persons, $47.8\%$ of the people living in medium or small towns, and $58.6\%$ of the persons whose economic status was low han experienced back pains, $58.9\%$ of respondents who were not healthy, and $49.3\%$ of those who did not drink alcohol, $47.9\%$ of nonsmokers, and $49.1\%$ of those who slept on ondol had experienced back pains. $76.7\%$ of the respondents got health information on back pains from health professionals. 2. An average level of the respondents en physical therapy was $14.95\pm8.32$ points out of 44 and it was 34 points when converted to 100. The knowledge levels of males,. elementary teachers, married persons, those teaching students far more than 20 hours a week, smokers, those who did not drink, those who exercised regularly, and those who had experienced back pains were higher than those in other groups. The knowledge level of those who had experienced back pain prevention education was $18.88\pm8.88$ points and the difference between those with experience and those without experience was statistically significant. The depression level of those who got 40 pome on back pains, and physical therapy was higher than other group(p<0.001). 3, Depression levels of teachers on back pains and physical therapy related knowledge was higher in those with back pains than those without back pains(p<0.01). 4. The factors affecting experience of back pains were back pain related age, economic status, health status, smoking, style of kitchen, sown of information on back pain, and back pain prevention education. (p<0.001), 5. The factors affecting the knowledge on physical therapy were general knowledge levels on back pains, position when tilling, and moving heavy stuffs, driving position, sources of information on back pain prevention, type of bed, age, and health status, and the explanation power of those factors was $45.2\%$.

• Korean Journal of Construction Engineering and Management
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• v.17 no.5
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• pp.78-88
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• 2016

Recently BIM technology has been expanded for using in construction project. However its spread has been delayed than the initial expectations, due to the high-cost of BIM infrastructure development, the lack of regulations, the lack of process and so forth. In design phase, especially, collaboration based on BIM system has being a key factor for successful next generation building project. Through the analysis of current research trend about IT technologies, virtualization and BIM service, data exchange such as drawing, 3D model, object data, properties using cloud computing and virtual server system is defined as a most successful solution. In various industrial fields, cloud computing technology is utilized as a promising solution which can reduce time and cost of hardware infrastructure. Among the cloud computing technology, VDI is receiving a great deal of attention from it market as an essential part cloud computing. VDI enables to host multiple individual virtual machines by using hypervisor. It has an advantage to easy main device management. Therefore, this study implements a step-by-step user's DaaS by analyzing the desktop resource data of the workers from Pre-design phase to Schematic design, Design develop and Construction design phase. It also develops BIM environment based on test of BIM modeler and designers in architectural design firm. The goal of the study is to enable the cloud computing BIM server. It provides cost saving, high-performance quality of working environment and cooperation's convenience and high security when doing BIM work in small and medium sized architectural design firm.

• The Transactions of the Korea Information Processing Society
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• v.7 no.10
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• pp.3262-3271
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• 2000

Continuous media objects, due to large volume and real-time consiraints in their delivery,are likely to consume much network andwidth Generally, proxy servers are used to hold the fiequently requested objects so as to reduce the network traffic to the central server but most of them are designed for text and image dae that they do not go well with continuous media data. So, in this paper, we propose a two-layered network cache management policy for continuous media object delivery on the wide area networks. With the proposed cache management scheme,in cach LAN, there exists one LAN cache and each LAN is further devided into a group of sub-LANs, each of which also has its own sub-LAN eache. Further, each object is also partitioned into two parts the front-end and rear-end partition. they can be loaded in the same cache or separately in different network caches according to their access frequencics. By doing so, cache replacement overhead could be educed as compared to the case of the full size daa allocation and replacement , this eventually reduces the backbone network traffic to the origin server.

• Journal of Korean Society of Health-System Pharmacists
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• v.35 no.4
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• pp.453-462
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• 2018

Background : The prevalence of chronic hepatitis C virus (HCV) tends to be higher in the elderly. Pegylated interferon and ribavirin therapy (Peg-IFN/RBV) was recommended as the first-line treatment in the past decades, but this regimen showed unsatisfactory results in terms of safety and efficacy especially in elderly patients. Recently, it was demonstrated that dual therapy with daclatasvir and asunaprevir was well tolerated and led to high sustained virological response (SVR) rates, irrespective of age. We conducted a study to evaluate the efficacy and safety of daclatasvir plus asunaprevir by involving elderly patients aged above 65 years. Methods : We retrospectively analyzed clinical data from chronic hepatitis C virus (HCV) genotype 1b patients treated with daclatasvir plus asunaprevir from September 2015 to December 2016 at Seoul St. Mary's hospital. The patients were divided into two groups as elderly patients (older than 65 years) and non-elderly patients (younger than 65 years) and compared the efficacy and safety. Results : A total of 112 patients were treated with daclatasvir plus asunaprevir for chronic hepatitis C. Among them, 101 patients completed the whole treatment, and in 88 patients the amount of HCV RNA was measured after 12 weeks of treatment. There was no significant difference in SVR at 12 weeks between both the groups (p=0.68). Typically, 91.4%(32/35) of elderly patients and 94.3%(50/53) of non-elderly patients achieved SVR12. Common adverse events included elevation in transaminase level, headache, and gastrointestinal disorders. There was no statistical difference in the symptoms between the two groups. Conclusions : The combination therapy with daclatasvir plus asunaprevir exhibited similar rates of SVR12 in HCV elderly patients without leading to further adverse events compared to non-elderly patients. Therefore, it is proposed that daclatasvir plus asunaprevir therapy could be considered as an effective and safe treatment, even in patients aged over 65 years.

• Korean Journal of Optics and Photonics
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• v.31 no.1
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• pp.1-6
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• 2020

The chest wall, an organ directly affected by environmental particles through respiration, consists of ribs, a pleural layer and intercostal muscles. To diagnose early and treat disease in this body part, it is important to visualize the details of the chest wall, but the structure of the pleural layer cannot be seen by chest computed tomography or ultrasound. On the other hand, optical coherence tomography (OCT), with a high spatial resolution, is suited to observe pleural-layer response to talc, one of the fine materials. However, intensity-based OCT is weak in providing information to distinguish the detailed structure of the chest wall, and cannot distinguish the reaction of the pleural layer from the change in the muscle by the talc. Polarization-sensitive OCT (PS-OCT) takes advantage of the fact that specific tissues like muscle, which have optical birefringence, change the backscattered light's polarization state. Moreover, the birefringence of muscle associated with the arrangement of myofilaments indicates the muscle's condition, by measuring retardation change. The PS-OCT image is interpreted from three major perspectives for talc-exposure chest-wall imaging: a thickened pleural layer, a separation between pleural layer and muscle, and a phase-retardation measurement around lesions. In this paper, a rabbit chest wall after talc pleurodesis is investigated by PS-OCT. The PS-OCT images visualize the pleural layer and muscle, respectively, and this system shows different birefringence of normal and damaged lesions. Also, an analyisis based on phase-retardation slope supports results from the PS-OCT image and histology.