• Journal of Acupuncture Research
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• 제23권3호
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• pp.67-75
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• 2006

Objectives : The purpose of this study is to evaluate the clinical effect of moxibustion treatment for FBSS patients by VAS. Methods : This clinical study was carried out for 51 cases with FBSS, who had been treated from January, 2003 to October, 2005, in oriental medical clinic. The patients were treated by the moxibustion during 8 weeks on the pain region of lower back or legs. We measured the effects of treatment by VAS. SPSS( Statistical Program for Social Science) for Windows was used for statistical analysis and repeated measures ANOVA was performed to gauge the improvement of VAS. Results : 1. We investigated 25 female and 26 male patients. The age distribution was from early 20's to 70's, among which 50's were most common. 2. The worsening factors are usually overwork and heavy lifting, but the main reason is unknown. 3. According to VAS, The patients with FBSS were improved by moxibustion treatment. Conclusion : Through this research, moxibustion therapy is considered to be effective and safe method for FBSS(Failed Back Surgery Syndrome). Moxibustion treatment had some problems that should be overcome such as severe pain and burning. Therefore we should pay more attention.

• 한국비블리아학회지
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• 제21권1호
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• pp.71-88
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• 2010

디지털시대의 도래로 도서관의 자원요소의 구성 및 각 자원요소의 중요도 비중이 매우 달라졌음에도 불구하고, 여전히 과거의 전통적인 요소만으로 대학도서관의 효율성을 측정하고 있는 것에 한계가 있다고 생각하고, 본 연구에서는 디지털도서관 시대에 적합한 도서관효율성 평가를 위한 자원요소를 재규명하고자 하였다. 설문조사방법이 사용되었으며, 그 결과 투입요소로 예산, 직원, 면적, 단행 본 수, 연속간행물 수, 전자저널 수, 비도서 수, 웹DB 종수, 전자책 수, 컴퓨터 수, 원문DB구축건수 등이 선정되었고, 산출요소로 대출책 수, 이용자 수, 홈페이지 접속건수, 웹 DB 이용건 수 등이 선정되었다. 재발견된 자원요소 중 전자자원 요소가 상당히 발견된 것을 알 수 있었다.

• 한국실내디자인학회논문집
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• 제25권6호
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• pp.139-148
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• 2016

Chronic patients and staffs in healthcare facilities cannot avoid long-term stays indoors. Therefore, they need to get adequate amounts of sunlight to prevent diseases caused by vitamin D deficiency. This is a case study on the advanced daylighting systems installed to healthcare facilities for therapeutic environments as serving natural light therapy and a pleasant atmosphere. This paper shows daylighting devices that overcome the structural limits of architectural design solutions for inducing natural light. This study presents appropriate daylighting technologies to the purpose and types of healthcare facilities by analyzing therapeutic environmental factors. Natural light delivered through daylighting devices help directly patients recover. In addition, it can improve healthcare providers' performance and productivity, and reduce their errors, thereby creating therapeutic environments for patients, indirectly. Excellent color rendering of solar illumination is also a powerful tool for navigation and wayfinding in the buildings, and for aesthetic treatment in dental office. Furthermore, daylighting systems are streamlined and require the least material and space to attract sunlight up to the deeper inside. But because of expensive cost, they have not yet been widespread. Though daylighting devices are typically more expensive than artificial illuminations to install, the running cost savings can compensate for the initial installation cost. With the development of technology in the future, the market price of them is expected to be formed properly.

• 대한산업공학회지
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• 제37권2호
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• pp.144-152
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• 2011

Most of the models for the vehicle routing problems studied in the literature assumed constant travel times. However, those approaches may give infeasible solutions when traffic congestion causes delays in travel time. To overcome such difficulty, there have been some researches considering the change of the travel time which is called the time dependent vehicle routing problem (TDVRP). TDVRP assumes that the travel time between two locations is not only affected by the distance traveled, but by many other factors including the time of the day. In this paper, we propose a branch-and-price algorithm to solve the TDVRP. The time dependent property of the travel time is dealt with an enumeration scheme with bounding procedures in the column generation procedure identifying a profitable route. The proposed algorithm guarantees the "Non-passing" property to be held in the solutions. The algorithm was tested on problems composed of the Solomon's benchmark instances for 25 and 50 nodes. Computational results are reported.

• 한국정보통신학회논문지
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• 제6권3호
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• pp.386-392
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• 2002

인터넷전화(Internet telephony)는 network를 통하여 음성데이터를 주고받는 응용프로그램으로 좋은 음질의 제공은 필수적이다. 그러나 음성데이터가 네트워크를 통하여 전송이 되면서 전송지연과 지연 편차 등의 Jitter현상에 영향을 받아 음질의 저하를 유발하므로 수신측에서는 적절한 jitter buffer를 제공해야만 한다. 본 논문에서는 인터넷전화에서 보다 양질의 음성을 제공하기 위하여 단말기 입장에서 버퍼관리 알고리즘을 제안한다. 제안한 알고리즘은 현재 단말기에서 사용하고 있는 압축알고리즘의 종류와 수신된 데이터만을 근거 자료로 수신데이터의 변화에 적응적으로 반응하면서 음질을 향상할 수 있는 버퍼관리 알고리즘이다. 제안한 알고리즘의 유용성을 확인하기 위하여 다양한 네트워크 상황에서 기존의 알고리즘과 네트워크 상황판단의 성능을 비교한다.

• 정보처리학회논문지D
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• 제11D권1호
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• pp.211-218
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• 2004

J2ME 기반의 MIDP는 기존 데스크탑 클라이언트에 비해 메모리, 스크린, 그리고 네트워크나 처리속도측면에서 많은 제한점을 가지고 있다. 특히 휴대폰의 경우 각 기기별 스크린 크기가 다르고, 통신사별 서비스 방식이 다르므로, 서버측면에서 보면 이를 위한 세심한 처리과정이 있어야 한다. 이것은 서버의 부하를 유발하는 원인이 될 수밖에 없다. 따라서 본 논문에서는 서버 측에선 XML 문서 형태로 서비스를 하고, J2ME 기반의 클라이언트에선 kXML 파서를 이용한 MIDlet 프로그램을 수행하게 함으로서, 서버의 부하를 줄임과 동시에 J2ME 클라이언트의 단점을 극복하는 방안을 제시하고자 한다.

• 대기
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• 제20권4호
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• pp.495-503
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• 2010

Satellite data have an intrinsic problem due to a number of various physical parameters, which can have a similar effect on measured radiance. Most evaluations of satellite performance have relied on comparisons with limited spatial and temporal resolution of ground-based measurements such as soundings and in-situ measurements. In order to overcome this problem, a new way of satellite data evaluation is suggested with statistical tools such as empirical orthogonal function(EOF), and singular value decomposition(SVD). The EOF analyses with OMI and OMI HCHO over northeast Asia show that the spatial pattern show high correlation with population density. This suggests that human activity is a major source of as well as HCHO over this region. However, this analysis is contradictory to the previous finding with GOME HCHO that biogenic activity is the main driving mechanism(Fu et al., 2007). To verify the source of HCHO over this region, we performed the EOF analyses with vegetation and HCHO distribution. The results showed no coherence in the spatial and temporal pattern between two factors. Rather, the additional SVD analysis between $NO_2$ and HCHO shows consistency in spatial and temporal coherence. This outcome suggests that the anthropogenic emission is the main source of HCHO over the region. We speculate that the previous study appears to be due to low temporal and spatial resolution of GOME measurements or uncertainty in model input data.

• 한국안광학회지
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• 제3권1호
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• pp.167-179
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• 1998

현재 렌즈제조업체의 실정은 여러 가지 요인으로 기술이나 기계설비, 투자가 위축되어 있으나 경쟁력 향상을 위해서는 좀더 과감한 투자가 필요하다. 제품의 신임도는 무엇보다 관리기술과 품질검사가 중요한데 외관검사와 내관검사는 육안이 아닌 현미경과 컴퓨터를 이용하여 과학적으로 해야하며, 강도검사는 자동차유리강도검사와 마찬가지로 안경렌즈의 파손시 신체에 부상이 없도록 해야 한다. 또한 안경렌즈의 원재료는 기술수준의 미비로 인해 모두 수입되고 있으므로 이를 극복하기 위해서는 기술개발이 가능한 연구기관을 설립하고 전문인력을 양성해야한다.

• 한국생산제조학회지
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• 제19권5호
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• pp.622-630
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• 2010

The increase of the spindle speed to enhance the productivity in ring spinning processes has been limited by yarn tension and heat generation of the traveller/ring. The main causes of yarn tension are 1) the force added directly to the yarn by the rotation of the spindle and 2) the centrifugal force exerted by the yarn balloon generated by traveller rotation. The dominant causes of heat generation are 1) the friction between the ring and traveller and 2) the friction between the traveller and yarn. These factors cause yarn end-breaks and heat damage. In the case of the staple yarn manufacturing process for PET (polyester) and nylon (a heat plasticity material), the rotational speed of the ring spinning system has deteriorated to 10,000rpm. The objective of this study was to develop a rotating ring which has dynamic stability, high productivity and a simple structure to overcome the limitations of the conventional fixed ring/traveller system. The results of this study revealed that the spinning tension could be reduced by 67.8% using the newly developed rotating ring.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.662-662
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• 2013

Over the last several decades, innovative light-harvesting devices have evolved to achieve high efficiency in solar energy transfer. Research on the mechanisms for plasmon resonance is very desirable to overcome the conventional efficiency limits of photovoltaics. The influence of localized surface plasmon resonance on hot electron flow at a metal-semiconductor interface was observed with a Schottky diode composed of a thin silver layer on $TiO_2$. The photocurrent is generated by absorption of photons when electrons have enough energy to travel over the Schottky barrier and into the titanium oxide conduction band. The correlation between the hot electrons and the surface plasmon is confirmed by matching the range of peaks between the incident photons to current conversion efficiency (IPCE, flux of collected electrons per flux of incident photons) and UV-Vis spectra. The photocurrent measured on Ag/$TiO_2$ exhibited surface plasmon peaks; whereas, in contrast to the Au/$TiO_2$, a continuous Au thin film doesn't exhibit surface plasmon peaks. We modified the thickness and morphology of a continuous Ag layer by electron beam evaporation deposition and heating under gas conditions and found that the morphological change and thickness of the Ag film are key factors in controlling the peak position of light absorption.