• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.59-62
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• 2009

In general, as a dynamic range of digital still camera is narrower than a real scene‘s, it is hard to represent the shadow region of scene. Thus, multi-scaled retinex algorithm is used to improve detail and local contrast of the shadow region in an image by dividing the image by its local average images through Gaussian filtering. However, if the chromatic distribution of the original image is not uniform and dominated by a certain chromaticity, the chromaticity of the local average image depends on the dominant chromaticity of original image, thereby the colors of the resulting image are shifted to a complement color to the dominant chromaticity. In this paper, a modified multi-scaled retinex method to reduce the influence of the dominant chromaticity is proposed. In multi-scaled retinex process, the local average images obtained by Gaussian filtering are divided by the average chromaticity values of the original image in order to reduce the influence of dominant chromaticity. Next, the chromaticity of illuminant is estimated in highlight region and the local average images are corrected by the estimated chromaticity of illuminant. In experiment, results show that the proposed method improved the local contrast and detail without color distortion.

• Asian-Australasian Journal of Animal Sciences
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• 제25권12호
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• pp.1768-1774
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• 2012

This study was conducted to evaluate methane ($CH_4$) and nitrous oxide ($N_2O$) emissions from livestock agriculture in 16 local administrative districts of Korea from 1990 to 2030. National Inventory Report used 3 yr averaged livestock population but this study used 1 yr livestock population to find yearly emission fluctuations. Extrapolation of the livestock population from 1990 to 2009 was used to forecast future livestock population from 2010 to 2030. Past (yr 1990 to 2009) and forecasted (yr 2010 to 2030) averaged enteric $CH_4$ emissions and $CH_4$ and $N_2O$ emissions from manure treatment were estimated. In the section of enteric fermentation, forecasted average $CH_4$ emissions from 16 local administrative districts were estimated to increase by 4%-114% compared to that of the past except for Daejeon (-63%), Seoul (-36%) and Gyeonggi (-7%). As for manure treatment, forecasted average $CH_4$ emissions from the 16 local administrative districts were estimated to increase by 3%-124% compared to past average except for Daejeon (-77%), Busan (-60%), Gwangju (-48%) and Seoul (-8%). For manure treatment, forecasted average $N_2O$ emissions from the 16 local administrative districts were estimated to increase by 10%-153% compared to past average $CH_4$ emissions except for Daejeon (-60%), Seoul (-4.0%), and Gwangju (-0.2%). With the carbon dioxide equivalent emissions ($CO_2$-Eq), forecasted average $CO_2$-Eq from the 16 local administrative districts were estimated to increase by 31%-120% compared to past average $CH_4$ emissions except Daejeon (-65%), Seoul (-24%), Busan (-18%), Gwangju (-8%) and Gyeonggi (-1%). The decreased $CO_2$-Eq from 5 local administrative districts was only 34 kt, which was insignificantly small compared to increase of 2,809 kt from other 11 local administrative districts. Annual growth rates of enteric $CH_4$ emissions, $CH_4$ and $N_2O$ emissions from manure management in Korea from 1990 to 2009 were 1.7%, 2.6%, and 3.2%, respectively. The annual growth rate of total $CO_2$-Eq was 2.2%. Efforts by the local administrative offices to improve the accuracy of activity data are essential to improve GHG inventories. Direct measurements of GHG emissions from enteric fermentation and manure treatment systems will further enhance the accuracy of the GHG data.

• Nuclear Engineering and Technology
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• 제31권1호
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• pp.29-48
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• 1999

Local two-phase flow parameters of subcooled flow boiling in inclined annulus were measured to investigate the effect of inclination on the internal flow structure. Two-conductivity probe technique was applied to measure local gas phasic parameters, including void fraction, vapor bubble frequency, chord length, vapor bubble velocity and interfacial area concentration. Local liquid velocity was measured by Pilot tube. Experiments were conducted for three angles of inclination; 0$^{\circ}$(vertical), 30$^{\circ}$, 60$^{\circ}$. The system pressure was maintained at atmospheric pressure. The range of average void fraction was up to 10% and the average liquid superficial velocities were less than 1.3 m/sec. The results of experiments showed that the distributions of two-phase How parameters were influenced by the angle of channel inclination. Especially, the void fraction and chord length distributions were strongly affected by the increase of inclination angle, and flow pattern transition to slug flow was observed depending on the How conditions. The profiles of vapor velocity, liquid velocity and interfacial area concentration were found to be affected by the non-symmetric bubble size distribution in inclined channel. Using the measured distributions of local phasic parameters, an analysis for predicting average void fraction was performed based on the drift flux model and flowing volumetric concentration. And it was demonstrated that the average void fraction can be more appropriately presented in terms of flowing volumetric concentration.

• Journal of Biosystems Engineering
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• 제4권2호
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• pp.1-8
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• 1979

This study was carried out to investigated the actual state of rice milling at local milling plants and to find out sources for elevating their milling recoveries in both quantity and quality. At 36 local milling plants located in Gyeongnam and Jeonnam , milling recoveries and head rice recoveries were measured with respect to their different milling systems and rice varieties. Then, the same samples of rice were milled by experimental milling equipments at laboratory, and the two experimental results were compared in order to determine the amount of milling recovery possibly to be increased. The results of this study are as follows ; 1. Milling recoveries of rice at local milling plants were proved to have no relationship with milling systems, and were 68.1% per ent and 72.6percent on an average with new variety and native variety, respectively. 2. The milling recoveries above stated can be elevated 4.5 percent and 2.9percent with new variety and native variety, respectively, by developing and extending technologies of manufacturing and handling rice milling machinery. 3. The head rice recovery of new variety at local milling plants has insignificant differences among milling systems, and was 54.8 percent on the average. With native variety, the recovery by friction type rice polisher was 0.9percent higher than that of friction-abrasive type polisher, and was 64.9 percent on the average. 4. The head rice recoveries of new variety and native can be elevated 5.1percent and 3.9percent, respectively, by the same stimulation above mentioned.

• Asian-Australasian Journal of Animal Sciences
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• 제7권2호
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• pp.261-264
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• 1994

The lactation milk yields of 209 buffaloes and cattle were measured on farms in Taplejung and Dhankuta Districts in East Nepal. This includes local and crossbred buffaloes and cows. The average milk yield (${\pm}\;SD$) of 97 local buffaloes was $833\;{\pm}\;94.6\;kg$ whereas that for 83 local cows was only $455\;{\pm}\;61.5\;kg$. The milk yield of buffaloes decreased with number of calvings, but that for the cows increased. The milk yields of 18 Murrah crossbreds were on average 215 kg higher than the yields of local buffaloes, and the yields of 11 Jersey crossbred cows averaged 247 kg more than the local cows. Lactation length (${\pm}\;SD$) which averaged $326\;{\pm}\;100$ days for the buffaloes and $292\;{\pm}\;98$ days for the cows, was not affected by crossbreeding. The milk yields of the crossbreds were more variable than the local buffaloes and cows. In addition to milk yield the overall productivity of a milking animal depends on calf mortality, age at first calving, calving interval, longevity, food intake, the work performance of male cattle and the meat production of male buffaloes. Among these parameters, the work performance of Jersey crossbred and local male cattle was studied later. However, other factors could not be measured.

• KDI Journal of Economic Policy
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• 제43권3호
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• pp.55-77
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• 2021

In Korea, local governments and local agencies had to apply a version of the first price auction augmented by an ex-post screening process when they procure construction contracts. However, this first price auction had been criticized because it was felt that too much price competition could lead to poor ex-post performance in construction. In response, the existing auction method was recently replaced by a version of the average price auction with a similar screening process. This paper empirically examines the effectiveness of this reform and finds that the replacement only increases the fiscal burden of local governmental bodies without making any improvement in the ex-post performance.

• 한국산학기술학회논문지
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• 제16권3호
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• pp.1764-1772
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• 2015

본 연구의 목적은 사회적 자본 수준이 제주도의 지역 공동체 문화의 하나로 논의되고 있는 괸당문화에 대한 영향력과 지역사회발전을 위한 긍정요소로 어떠한 영향이 있는지 살펴보기 위한 직접설문조사로 제주지역주민 600명을 대상으로 실시하였고, 최종분석에는 594부가 사용되었다. 수집된 자료는 SPSS 18.0을 이용하여, 기술통계, T-test, ANOVA 분석 및 다중회귀분석을 실시하였다. 분석결과, 첫째, 조사대상자의 사회적 자본의 수준은 네트워크(평균 4.01점), 신뢰(평균 3.80점), 규범(평균 3.43점), 협력(평균 3.00점), 참여(평균 2.80점)의 수준으로 나타났고, 둘째, 사회적 자본은 대체로 도농지역, 행정구역, 월평균소득에 따라 집단간 차이가 있었다. 마지막으로 사회적 자본의 하위 요인 중 네트워크와 참여가 높을수록 괸당문화의 필요성이 높다고 인식하고 있으며, 규범과 참여가 높을수록 괸당문화는 지역사회발전에 중요한 영향요인으로 작용할 수 있음을 확인하였다. 따라서 이러한 연구결과들을 통하여 사회적 자본의 육성은 괸당문화를 긍정적 공동체문화로서 지역발전에 중요한 요소로 활용할 수 있다는 시사점을 갖는다.

• 한국식품조리과학회지
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• 제31권2호
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• pp.193-199
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• 2015

According to the definition of 'native local food', Jeju has combined its regional specialty products with its own cooking method. It has almost four-hundred kinds, which reflects regional specialty and diversity, yet it is not very well-known. Thus, this present study provides basic research information through the investigation of tourist awareness, intention to consume, drawbacks, development necessity and direction of development of Jeju local foods. The survey was conducted with 295 domestic tourists who had visited Jeju in the last 10 years. In response to a question asked about the consciousness of Jeju local foods, 67.8% of respondents chose average, indicating a relatively high cause for concern. Intention to consume averaged 3.26, which was higher than tourist awareness, having an average of 2.60. Furthermore, local food interest and demographic characteristics of respondents were found to have an influence on tourist awareness and intention to consume. 87.8% of respondents answered above average with respect to the drawbacks of Jeju's local foods and development necessity and direction, with the main drawbacks being lack of PR (43.1%) and high price (39.0%). The priority of most respondents was the quality and taste of the food (50.8%). Based on the results of this study, if tourist awareness can be effectively increased, an escalation in intent to consume will follow, naturally promoting the consumption of Jeju's local foods. Consequentially, for tourism commercialization, the quality and taste of the foods have to be improved in addition to the gain in popularity through efficient PR methods.

• 센서학회지
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• 제28권2호
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• pp.88-93
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• 2019

This paper is concerned with distributed fusion moving average prediction for continuous-time linear stochastic systems with multiple sensors. A distributed fusion with the weighted sum structure is applied to the optimal local moving average predictors. The distributed fusion prediction algorithm represents the optimal linear fusion by weighting matrices under the minimum mean square criterion. The derivation of equations for error cross-covariances between the local predictors is the key of this paper. Example demonstrates effectiveness of the distributed fusion moving average predictor.

• 한국콘텐츠학회논문지
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• 제14권1호
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• pp.318-325
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• 2014

본 연구는 국세청에서 공시한 2012년도 공공의료원의 손익계산서 분석을 통해 이익 측면에서의 공공의료원의 경영 분석에 대해 살펴보고자 한 것이다. 국세청에 공시된 2012년 공공의료원의 재무제표 총 38건의 손익계산서 중 중복된 자료를 제외하고 매출액, 매출원가, 판매비와 관리비의 구분 표기가 가능한 자료를 추출하여 최종 22건의 자료를 이용하였다. 분석에는 의료이익, 공헌이익, 매출액 추세를 이용하였다. 공공의료원의 의료이익을 분석한 결과 22개 공공의료원의 평균 의료이익은 손실로 -4,678.9백만 원이었고, 평균공헌이익은 12,572.5백만 원, 매출이 증가한 의료원의 평균 매출 증가액은 1,299.1백만 원이었다. 결과적으로 공공의료원의 의료이익은 손실이나 공헌이익이 발생하고 있고, 아울러 약 2/3의 의료원에서 매출액 증가 추이를 보이는 바 개별 의료원 차원만을 고려한 경영 의사결정 시에는 신중한 접근이 필요하며, 공공의료원이 전국에 지역별 거점 기관의 성격으로 개설되어 있는 국가 공공의료망의 일부라는 측면에서 전사적 차원, 즉 국가적 차원에서의 경영분석과 판단이 이루어져야 함을 제안한다.