• 대한치과의사협회지
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• 제25권9호통권220호
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• pp.847-854
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• 1987

Genioplasty may considerably change a person's face which needs surgical correction of deformed chin. Comprehensive treatment planning is therefore decisive for the treatment to be successful. A three-dimensional analysis of chin relative to cranial base, upper and lower jaws using the frontal and lateral facial photographs and cephalographs permits classification of the defective chin position and provides a basis for operation planning and deciding upon the operation method. A chin miniplate system has been developed for intraoperative registration securing the sagittal, vertical and horizontal position of the osteotomized chin and ould reduce the relapse rate.

• 기술혁신연구
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• 제12권1호
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• pp.1-24
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• 2004

This paper analyses the effects of R＆D investment on patent in Korean manufacturing firms during the period 1984-99. The data contains 140 companies which listed in Korea Stock Exchange(KSE). We observed that the relative shares of R＆D investments and patent applications are much higher in scientific firms than in the other firms. The regression results show that R＆D investment has significantly positive effects on the growth of patent application and registration. And the effects of R＆D on patent turns out to be stronger in scientific firms than the other firms. The firm size and the capital intensity also have an important effect on the propensity to patent.

• 자동차안전학회지
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• 제15권1호
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• pp.27-34
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• 2023

The registration rate of eco-friendly vehicles, such as hydrogen vehicles, is increasing rapidly, however, few first responders have experienced related accidents. Accident scenarios at hydrogen refueling stations and hydrogen vehicles on a road were investigated, and the relative importance of each scenario was analyzed using AHP analysis. Leakage, jet flame, and explosion that occurred inside and outside the hydrogen refueling station were reviewed, and the hydrogen gas explosion in the compartment showed the highest importance value. In case of the hydrogen vehicle, traffic accident statistics and actual accidents were used. It was analyzed that the hydrogen vessel explosion on the road due to the failure of TPRD and the leakage in the underground parking area were difficult to respond. The developed accident scenarios are expected to be used for first responder training.

• 대한원격탐사학회지
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• 제33권6_3호
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• pp.1179-1185
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• 2017

KOMPSAT-3A 위성은 기존의 지구관측 위성에 비하여 고해상도의 MWIR 영상을 하루 2번 취득한다. 기존 SWIR 영상이나 TIR 영상과 다른 특성으로 인하여 새로운 지표면 방사 정보를 제공할 수 있다. 본 연구에서는 KOMPSAT-3A MWIR 위성영상의 특성을 살펴보기 위하여 다시기 차이 영상을 생성하여 기존 적외 영상과 비교하였다. IR 영상의 전처리 과정으로 영상 상대보정을 수행하고, PIFs(Pseudo Invariant Features) 화소기반의 상대방사 보정을 수행하여 화소값의 차이를 최소화시켰다. Sentinel-2 SWIR 영상, Landsat 8 TIR 영상과 KOMPSAT-3A MWIR 영상을 실험한 결과, KOMPSAT-3A 차이 영상에서 인공지물의 구별이 두드러짐을 확인할 수 있었다. 이러한 IR영상의 특성을 이용하여 향후 KOMPSAT-3A MWIR 영상의 활용도를 높일 수 있을 것으로 여겨진다.

• 천문학회보
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• 제39권2호
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• pp.114-114
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• 2014

We present our activities linking to planning of possible forms of large program to study on circumstellar H2O and SiO maser sources with KaVA. A great advantage of KaVA for the stellar maser observations is the combination of the unique capability of the multi-frequency phase referencing technique of KVN and the dual-beam astrometry of VERA with the KaVA's relative dense antenna configuration. We have demonstrated this advantage through the test observations conducted by the KaVA Evolved Stars Sub-working Group since 2012 March. Snapshot KaVA imaging is confirmed to be possible in integration time of 0.5 hour at the 22 GHz band and 1.0 hour at the 43 GHz band in typical cases. This implies that large snapshot imaging surveys towards many H2O and SiO stellar masers are possible within a reasonable machine time (e.g., scans on ~100 maser sources within 200 hours). This possibility enables us to select the maser sources, which are suitable for future long-term (10 years) intensive (biweekly-monthly) monitoring observations, from 1000 potential target candidates selected from dual-frequency band (K/Q-bands) KVN single-dish observations. The output of the survey programs will be used for statistical analysis of the structures of individual stellar maser clumps and the spatio-kinematical structures of circumstellar envelopes with accelerating outflows. The combination of astrometry in milliarcsecond(mas) level and the multi-phase referencing technique yields not only trigonometric parallax distances to the masers but also precise position reference for registration of different maser lines. The accuracy of the map registration affects interpretation of the excitation mechanism of the SiO maser lines and the origin of the variety of the maser actions, which are expected to reflect periodic behaviors of the circumstellar envelope with stellar pulsation. Currently we are checking the technical feasibility of KaVA operations for this combination. After this feasibility test, the long-term monitoring campaign program will run as one of KaVA's legacy projects.

• 한국환경농학회지
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• 제39권3호
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• pp.214-221
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• 2020

BACKGROUND: The demand for pesticide registration has kept increasing for minor crop cultivation in greenhouse since Positive List System (PLS) has been launched. Thus, much study on the evaluation of pesticide residues in minor crops is required to examine the demand. In this study, we evaluated residues of acetamiprid, boscalid, imidacloprid and pyraclostrobin in the minor crop mustard green to provide the potential data for their registration. METHODS AND RESULTS: Pesticide granule formulations of acetamiprid, boscalid, imidacloprid and pyraclostrobin were incorporated into soil and applied onto field soil surface at rates of 3 kg/10a, 6 kg/10a, 3 kg/10a and 6 kg/10a, respectively. The pesticides were also applied at the two times higher than the rates to compare the residues between the application rates. Mustard green seeds were sown 1 day after pesticide application and cultivated under greenhouse conditions. LC/MS/MS analyses coupled with a modified QuEChERs method were employed for determination of the pesticides in plant samples. The method limits of quantitation (LOQ) of the pesticides were 0.01 mg/kg, and the matrix calibration curves of the pesticides showed linearity with coefficient values of determination (r²) greater than 0.995. The average recovery values of the pesticides fortified in control samples at rates of LOQ and 10LOQ ranged from approximately 77.5% to 101.2% with relative standard deviation values lower than 14%. The pesticides in the mustard green samples cultivated for 53 days after sown were determined to be lower than the LOQ level. CONCLUSION: Acetamiprid, boscalid, imidacloprid and pyraclostrobin were found at a level lower than 0.01 mg/kg in the minor crop mustard green. Thus, their residues in mustard green would not violate PLS under greenhouse conditions.

• 한국인구학
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• 제24권1호
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• pp.67-90
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• 2001

통계청에서는 출생 및 사망 신고가 동시에 누락되는 영아사망 미신고분을 감안하여 기간 출생률 및 사망률, 생명표상의 기간 영아사망확률을 추정하여 왔다. 보건복지부의 93년 및 96년 출생 코호트 영아사망조사 결과가 발표됨에 따라 통계청이 1971년-1997년 영아사망확률을 재추정하였다. 자료원은 사망신고 자료, 보건복지부 조사. 선진국의 사망신고 자료, 모델생명표 및 일본생명표이었으며, 17가지 방법으로 시산하였다. 최종 방법은 1993년 보건복지부 조사의 사망확률과 사망신고 자료의 1∼4세 사망 확률 관계에 의존하여 1971-1991년 영아사망확률을 추정하였고, 93년은 93년 보건 복지부 조사의 영아사망확률을 사용하였으며, 95년과 97년에 대해서는 93년과 96년 보건복지부 조사에 나타난 영아사망확률 감소율을 적용하였다. 영아사망확률은 Coale-Demeny North Model 을 활용하여 영아사망률로 전환하였다. 통계청이 수집한 98년 화장장 자료로 영아사망 미신고를 보완하여 영아사망률을 추정해 본 결과 화장장 자료는 영아사망수준 추정을 위한 중요한 자료원이 될 뿐만 아니라 신생아사망을 크게 보완하고, 태아사망 및 주산기사망 통계 생산도 가능한 것으로 나타났다.

• Asian Pacific Journal of Cancer Prevention
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• 제14권6호
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• pp.3581-3585
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• 2013

Background: Accurate statistics on the cancer burden are essential, both for purposes of research and for setting priorities in healthcare management. So that in vast countries with partial registration coverage, such as Iran, local data are more useful. We here estimated the incidence, prevalence and mortality time trend of four major cancer site, lung, stomach, breast and prostate, over the period 2001-2010 and provided short-range projections to 2015 in Isfahan. Materials and Methods: Estimates were derived by applying the mortality-incidence analysis method, a back-calculation approach to estimate and project incidence, prevalence and mortality of chronic degenerative disease, starting from knowledge of mortality and relative survival information. Results: Age adjusted incidence, mortality and prevalence rates in Isfahan exhibited a clear upward trend for all four sites during the period 2001-2015, with marked increasees in prostate and breast predicted for the future. Difference in incidence trends between males and females might be attributable to the difference in risk factors specific to certain cancer sites, with smoking being the main risk factor. Conclusions: In this study, males and females displayed an increasing pattern for incidence and mortality rate over the entire study period until 2015. This information can be used as basis for planning healthcare management and allocating recourses in public health.

• 무역상무연구
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• 제43권
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• pp.397-422
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• 2009

Electronic trade reduces additional costs generated from the issuing and management of paper documents, and overcomes the physical limitations of commercial transactions as well as the geographical and time limitations resulting from trading with foreign countries. These characteristics of electronic trade guarantees better and more effective global marketing for companies. In addition, by expanding relative superiority of large corporations to medium-small sized companies, many medium-small companies have shown great interest in electronic trade to promote its exporting businesses, and implementing changes to facilitate electronic trade into their business system. Therefore, it is expected that the electronic trade will be more widely distributed and utilized by businesses of all sizes in the future. The adaptation and implementation of the electronic trade system can only have prosperous effects when there is a high efficiency in the utilization and service process of the concerned company. Under this premise, this research first examined electronic trade, characteristics of the company and information utilization as the key elements to determine the effectiveness of the utility aspect. Then it examines confirmation of product demand, registration of revenues, and authorization as the key elements to determine the level of service process.

• Journal of Electrical Engineering and Technology
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• 제9권2호
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• pp.762-770
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• 2014

Tangible Space Initiative (TSI) is a new framework that can provide a more natural and intuitive Human Computer Interface for users. This is composed of three cooperative components: a Tangible Interface, Responsive Cyber Space, and Tangible Agent. In this paper we present a Tangible Tele-Meeting system in TSI, which allows people to communicate with each other without any spatial limitation. In addition, we introduce a method for registering a Tangible Avatar with a Tangible Agent. The suggested method is based on relative pose estimation between the user and the Tangible Agent. Experimental results show that the user can experience an interaction environment that is more natural and intelligent than that provided by conventional tele-meeting systems.