• 박물관보존과학
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• 제30권
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• pp.89-100
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• 2023

박물관 소장품은 다양한 재질로 구성되어 있으며, 유형과 제작 물성에 따른 다양한 과학적 조사가 이루어지고 있으나, 초소형 유물에 대한 연구는 미진하다. 본 연구에서는 금령총에서 출토된 백색 초소형 물질의 재료학적 특성을 파악하기 위해 다양한 비파괴 조사(비중측정, 현미경조사, Nano CT, SEM-EDS, XRD, RAMAN)를 실시하였으며, 선행연구된 고려시대 복장품과 비교 검토하였다. 비파괴조사 결과, 탄산칼슘(CaCO₃)을 주성분으로 하는 아라고나이트(Aragonite)가 주구성광물로 확인되었으며, 진주의 성장선이 관찰되어 보석인 진주로 확인되었다. 본 연구를 통해 고대 한반도에서 진주의 출현시기를 6세기로 확인하였으며, 향후 백색의 초소형 물질에 대한 과학적 검토를 통해 당시 사회문화에 대한 정보를 획득할 수 있을 것으로 기대된다.

• 신재생에너지
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• 제16권1호
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• pp.47-57
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• 2020

In Floating PV (Photovoltaic) systems, PV modules are installed on water by utilizing the surface of idle water such as a reservoir and multipurpose dam. A floating PV system, therefore, has the advantage of efficiency in national land use and improved energy yield owing to cooling effect compared to on-land PV systems. Owing to the limitation of installation environment for a floating PV system, the system, however, has the disadvantage of an increase in transmission distance of DC (Direct current) cables. A longer transmission distance of a DC cable results in greater power loss due to a voltage drop. This leads to a decline in economic feasibility for the floating PV system. In this paper, the economic analysis for 10 floating PV systems installed in a reservoir has been conducted in terms of a change in annual power sales according to the variation of transmission losses depending on the factors affecting the voltage drop, such as transmission distance, cross-section area of underwater cable, the presence of joint box, and PV capacity.

• 대한예방한의학회지
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• 제14권2호
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• pp.57-66
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• 2010

Backgrounds : Since December 1, 2009, National Health Insurance began to reimburse for three physical therapies of Korean medicine. The extension of insurance coverage is demanded by Korean medicine societies. Objectives : This study aimed to measure the resource-based relative value scale (RBRVS) scores for thirty four physical therapies of Korean medicine and to estimate the insurer's expenditure for them in National Health Insurance. Methods : To measure the physician's work and the practice expense, the 'magnitude estimation method (MEM)' and the 'fully distributed cost - attributable cost method (FDC-ACM)' were applied respectively. We collected the frequency data of physical therapies from Korean medicine hospitals and clinics to estimate the total expenditure. Results : The resource-based relative value scale scores of physical therapies were measured from 23.44 to 160.66. Total insurer's expenditure was calculated to be 95.5 billion won as of 2009. Conclusions : Based on the result that showed minor increase of total expenditure, most physical therapies of Korean medicine need to be reimbursed in the National Health Insurance.

• 한국항만경제학회지
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• 제28권4호
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• pp.1-37
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• 2012

본 연구는 우리나라의 대표적 운송수단인 도로, 철도, 해운에 대해 피해함수접근법을 이용하여 사회적 비용을 추정하였다. 이를 위해 본 연구에서는 각각의 운송수단이 야기하는 사회적 비용 유발 분야를 10개의 항목으로 구분하고 각각의 항목에 대해 운송수단별로 메타데이터를 이용하여 항목별 비용을 산정하였다. 분석 결과 교통시설의 건설비용을 포함할 경우 해상운송이 가장 효율적인 반면 도로운송과 철도운송은 효율성에서 큰 차이를 보이지 않았으나, 건설비용을 고려하지 않을 경우 해상운송에 이어 철도운송도 매우 효율적인 운송수단임이 나타났다. 본 연구에서는 또한 각각의 운송수단이 같은 사회적 비용을 유발하는 등비용 수송거리를 산정하였다. 이를 통해 도로운송, 철도운송, 해상운송의 효율적 수송거리를 제시하였으며 이를 통해 보다 효율적인 모달시프트(modal shift)의 계기가 제공될 수 있기를 기대한다.

• 한국병원경영학회지
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• 제7권3호
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• pp.84-101
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• 2002

This study estimated the influence of 'the separation of prescribing and dispensing roles' (SPD) policy, which implemented in July 2000, on the community pharmacies in Korea, by using data on the revenues and expenditures in the previous researches. We first assumed the rate of drug price differential was 20% with four different models which was based on various data of studies carried out in the similar period. Later, we applied different rates for the sensitivity analysis. According to the results, all community pharmacies made the net profit of 118.9 billion won (0.552 million won monthly per one pharmacy) after the SPD policy. The ratio of net profit to net sales dropped by 7.41%p from 22.19% to 14.78%. Additional sensitivity analysis indicated there were wide range of differences about whether net profit or net gain, and that extent which either existed.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제36권4호
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• pp.270-274
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• 2010

Introduction: Limited mouth opening is a representative clinical symptom of temporomandibular disorders (TMD) with anterior disc displacement without reduction (ADDWOR). Various treatment methods have been proposed for patients with ADDWOR. This study examined the clinical effectiveness of template therapy for patients with mouth opening difficulty due to the ADDWOR. Material and Methods: A total of 14 patients (female 12, male 2, average age: $29.1{\pm}14.4$), who had been treated in the template clinic, Sooncheonhyang University Bucheon Hospital, from January of 2006 to December of 2008, were enrolled in this study. The subjects were selected according to the following criteria: more than 2 weeks after the onset of locking, mouth opening range <35 mm, and confirmed ADDWOR without a synovial pathology by magnetic resonance imaging (MRI). All patients were treated with the template appliance, instructed to wear it while sleeping and exercise for at least 10 hours per day. The maximum mouth opening (MMO) range and pain recognition scores before and after template therapy were recorded and compared. A paired t-test and Wilcoxon's signed rank test were used for statistical analysis. Results: After the periodical follow up, significant improvement in the opening range was observed in the template treatment group. The average MMO range before treatment was $30.2{\pm}3.5mm$ and the average MMO after treatment and follow up was $47.1{\pm}4.7mm$. The mean amount of mouth opening increment was $16.9{\pm}5.4mm$ (P<0.01) and the pain recognition scores before and after treatment was also improved.(P=0.001) Conclusion: The template appliance proved to be efficient for the treatment of TMD with a closed lock and painful joint due to ADDWOR.

• 한방재활의학과학회지
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• 제19권3호
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• pp.101-109
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• 2009

Objectives : This study aimed to investigate the present status of physical therapies provided in the Korean medicine clinics, and to find out the priorities among and the estimated fees of physical therapies for the National Health Insurance plan. Methods : We administered nationwide survey to Korean medicine doctors using the on-line survey system. 16 physical therapies were listed in the Web-based questionnaires, and responders were asked to mark the therapies they used for their patients, and, for each therapy they marked, to fill in the form including the frequencies of service, service fees, target diseases, and priorities for health insurance coverage, etc. Results : Of 488 respondents, 93.7% provide more than one physical therapy for their patients, and each responder uses 5.9 physical therapies on average. 60-90% of physical therapies are being given to patients for free because they are not covered by the National Health Insurance. There is little evidence that the specialties of Korean medicine doctors are related with the use of physical therapies, but, in some therapies, the doctors with longer career years use the physical therapy more frequently. Most physical therapies are applied to the patients with musculoskeletal diseases, cardiovascular diseases, and nervous diseases, etc. Conclusions : Physical therapies are widely used among Korean medicine doctors without proper compensation. This could be the one of the main factors distorting the profit structure of Korean medicine clinics, and it encourages the National Health Insurance to cover physical therapies provided in the Korean medicine clinics.

• Tuberculosis and Respiratory Diseases
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• 제53권4호
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• pp.450-456
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• 2002

심한 호흡부전을 보인 특발성 기관 협착증 환자에서 풍선 확장술 및 기관 스텐트 삽입술을 시행하여 호흡을 안정시킨 후 수술적 절제 및 문합술을 시행하였다.

• Archives of Plastic Surgery
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• 제33권1호
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• pp.61-66
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• 2006

The purpose of this study is to introduce the method of palate repair that combines minimal hard palate dissection and radical retropositiong of levator musculature, which was presented by Sommerlad. As this method presents, additional use of the operating microscope enables atraumatic and radical dissection, and it might provide more improved speech function to the patients. A total of 17 patients with cleft palate underwent Sommerlad's method from December 2003 to August 2004. The mean follow-up period was 4.5 months. The use of a microscope provided high quality variable magnification and good illumination at the operating field. Repair was carried out through incisions at the margins of cleft with mucoperiosteal flap elevation. Muscles were rearranged and repaired properly. It was unable to evaluate the improvement of speech because the patients were too young to learn meaningful speech. Average operating time including anesthetic induction time, V-tube insertion and recovery from anesthesia was 2 hours 45 minutes which was not quite different from conventional method's operating time. Oronasal fistula developed in 2 patients of them. One of them was healed spontaneously. As meticulous and radical muscle dissection was possible with Sommerlad's method, we could minimize the trauma to the muscular and neurovascluar structure. In addition, we expect better faculty of speech as a result of this method although longer follow-up time was unavailable.

• 한국재료학회지
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• 제14권6호
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• pp.407-412
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• 2004

Photo decomposition of gas phase benzene by $TiO_2$ thin films chemically deposited on alumina balls were investigated under UV irradiation. Photo decomposition rates were measured in real time during the reaction using a photo ionization detector, which ionizes C-H bonding of benzene molecules and then converts into volatile organic compounds (VOCs) concentrations. From the measuring results, the VOCs concentration increased instantly when IN irradiated because C-H bonds of benzene molecules strongly absorbed on the surface of $TiO_2$ films before the IN irradiation was destroyed by photo decomposition. After that, the VOCs concentration decreased with increasing surface area of $TiO_2$ and reaction time under the IN irradiation. At the optimal conditions for the photo decomposition of gas phase benzene, the reaction rate of the photo decomposition for high concentrations (over 60 ppm) was slow but that of relatively low concentration (under 60 ppm) was fast, due to limited surface area of $TiO_2$ thin films for the reaction. Thus, it is concluded that the photo decomposition rate was mainly affected by the surface area of $TiO_2$ or absorption reaction.