• 대한원격탐사학회지
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• 제19권5호
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• pp.341-349
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• 2003

The so-called B-method, a simplified surface energy budget, permits calculation of daily actual evapotranspiration (ET) using remotely sensed data, such as NOAA-AVHRR. Even if the use of satellite data allows estimation of the albedo and surface temperature, this model requires meteorological data measured at ground-level to obtain the other inputs. In addition, a difficulty may be occurred by the difference of temporal scales between the net radiation in daily scale and instantaneous measurement at midday of the surface and air temperatures because the data covered whole day are necessary to obtain accumulated daily net radiation. In order to solve these problems, this study attempted a modification of B-method through an extension of hourly ET value calculated using a complete instantaneous inputs. The estimation of the daily apparent ET from newly proposed system showed a root mean square error of 0.26 mm/day as compared the output obtained from the classical model. It is evident that this may offer more rapid estimation and reduced data volume.

• 한국항만경제학회지
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• 제36권2호
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• pp.87-108
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• 2020

우리나라 물류산업은 산업의 발전과 함께 성장하였으며, 물류산업의 발전은 기업비용을 절감하고, 물가 상승을 억제하여 지역민 삶의 질을 향상시켰다. 이러한 물류산업은 국가와 지역 경제성장에 중요한 역할을 하며, 정부에서는 물류산업 육성을 위한 정책적인 노력을 이어오고 있다. 본 연구에서는 지역물류산업의 경쟁력을 분석하고, 물류산업의 지역경제 부가가치 기여도를 분석하여 지역 물류산업 육성을 위한 시사점을 제공하고자 한다. 입지계수를 분석하여 지역별 육상운송, 수상운송, 항공운송, 창고 및 운송관련 서비스업의 특화도를 분석하고, 지역산업연관표에서 부가가치율, 지역내총생산(GRDP) 기여도, 부가가치유발계수, 부가가치 순이입을 분석하여 지역 물류산업이 지역경제 부가가치에 미치는 영향을 알아보고자 한다. 분석결과 우리나라 물류산업은 산업별로 일부 지역에서 부가가치 순이입이 있고, 경쟁력을 가지고 있는 것으로 분석되었다. 지역 물류산업의 입지계수와 부가가치 기여도 사이에는 일정한 관계가 존재하지는 않았다. 우리나라 물류산업은 산업별로 서울, 인천, 경기, 부산, 제주 등을 중심으로 지역에 따라 다른 산업이 경쟁력을 가지고 있는 것으로 분석되었으며, 물류 인프라가 잘 발전된 지역과 육성이 필요한 지역을 구분하여 확인할 수 있었다. 물류산업이 발전한 지역은 고부가가치화를 위한 정책이 필요하며, 육성이 미비한 지역은 지역 수요에 맞는 인력과 자본을 투입하여 물류산업 육성을 위한 지원이 필요하다.

• 가정과삶의질연구
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• 제14권2호
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• pp.61-76
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• 1996

In this study it was assumed that planning was composed of three activities -resource assessment standard setting information seeking and implementing was composed of money investment and time investment, Two variable groups which were assumed to be related with planning and implementing were household characteristics and housewife's value characteristics. Money investment to children's education was significantly affected by income, net wealth of household instrumental value of eduation and information seeking about private education. The variables assumed to affect time investment to children's education were instrumental value of education information seeking about private education and expected education level.

• 지능정보연구
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• 제22권3호
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• pp.1-21
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• 2016

주관적 웰빙 서비스(subjective well-being service)는 Wellness IT의 주요 서비스이며 개인의 주관적 웰빙 상태를 무구속적이고 비용 효율적으로 측정하는 방법이 중요하다. 이를 위해 감성어휘사전을 활용할 수 있으나 감성어만으로 주관적 웰빙 상태를 측정할 수는 없으며 웰니스 어휘 사전이 별도로 구축될 필요가 있다. 더욱이 기존의 감성어휘사전은 동일한 감정어에 대해 한가지만의 감성값을 제공함으로써 그 용어를 사용한 사람의 특징에 따라 감성값이 변경될 수 있다는 점을 간과하고 있다. 따라서 본 연구의 목적은 현존하는 감성어휘사전 중에서 표현력이 가장 뛰어난 SenticNet을 기반으로 하여 SenticNet에서 제공하는 정보를 통해 스트레스, 우울, 분노, 행복감 등 웰니스 상태를 추정한 결과를 추가한 WellnessWordNet 을 개발하는 것이다. 또한 실제 사람들을 대상으로 WellnessWordNet 에 근거한 웰니스 상태 추정 정확도를 검증해 보았다. 본 논문의 독창성은 WellnessWordNet 웰니스 상태 언어에 대한 값을 제공할 뿐더러, 성별이나 연령과 같은 사람의 특성에 따라 다른 감성값을 제공하는 최초의 감성어휘사전이라는 것이다.

• 농촌계획
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• 제18권3호
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• pp.25-41
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• 2012

The purpose of this study is to quantitatively analyze the social welfare value given to the designated rural settlement zone by the resident-participated site unit plan that the City of Cheongju is newly attempting to draft. Firstly, the costs and benefits from the site unit planning were estimated. Secondly, through literature review especially focussed on the benefit and cost estimation, on-site questionnaire was designed, and then sample residents of the qualifying sites were asked about their willingness to pay, which could make it possible to estimate the monetary value of its benefits by the contingent valuation method (CVM). Finally, the present value of net benefits (PVNB) was estimated through the derived costs and benefits. As a result of analysis, firstly, the present value of net benefits (PVNB) was found to be 7,641 billion won, which indicated that the implementation of district-unit plan would be able to cause sufficient social welfare value for the effected residents. Secondly, in examining the result of individual average amount for willingness to pay through the CVM, the area that benefited the most was found to be the road improvement. Thirdly, as a result of sensitivity analysis, the parameter with the most effects was the discount rate, which suggested that, in carrying out public projects, excessive market interest rates would not be appropriate.

• 벤처창업연구
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• 제10권3호
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• pp.133-146
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• 2015

본 연구는 환헤지와 조선업체의 당기순이익과의 인과관계를 파악하고자 단위근 검정과 공적분 검정, 그리고 벡터자기회귀모형(vector autoregressive model : VAR)을 활용하였다. 먼저, 단위근 검정을 위해서는 2000년부터 2013년까지 분기별 조선업체들의 당기순이익은 존슨 변환 후의 값을 사용하였다. 동일 기간에 국채선물수익률(KTBF), 3년 만기 국채수익률(KTB3Y), 한미 환율, 한미 금리차이는 주별 데이터를 각 분기별 차이값으로 변환시켜서 활용하였고, 조선업체의 주가는 로그 변환 시킨 후에 사용하였다. 또한, 구조적 변화점 탐색 분석기법을 활용하여서 조선업체들의 당기순이익에 영향을 주는 환헤지에 구조적 전략 변화가 발생하는지 검증해 보았다. 연구결과는 환헤지와 조선업체의 당기순이익 간에는 구조적 변화점 탐지 분석에서는 2004년을 기점으로 구조적 변화가 발생하는 것으로 나타났다. 즉, 조선업체 중에서 소극적 환헤지 관리가 적극적 환헤지 전략으로 구조적 변화가 발생한 것이다. VAR의 추정을 통해 한국 조선업체들의 환헤지는 조선업체들의 상호 간의 수익성에 영향을 주고 있음을 파악 할 수 있었다. 또한 거시변수나 주가에 의해서도 조선업체들의 당기순이익이 영향을 받고 있음을 확인해 볼 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제12권5호
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• pp.747-751
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• 1999

The Hohenheim in vitro gas test was used to assess the nutritional value of some crop residues of known in vivo digestibility. The crop residues are groundnut shells (GNS) corn cobs (CC); cassava peels (CaP); unripe and ripe plantain peels (UPP, RPP) and citrus pulp/peels (CPP). Compared to other crop residues, crude protein (CP) content of CC was low. Except for CaP and CPP that had low neutral detergent fibre (NDF) and acid detergent fibre (ADF), other residues contained a high amount of cell wall constituents. Net gas production was significantly different among the crop residues (p<0.05). Gas production was highest in CPP followed by CaP. CC, UPP and RPP have the same volume of net gas production, while the least net gas production was in GNS. True dry matter (TDM) digestibility was significantly different (p<0.05) among the residues. GNS was the least in TDM digestibility. CaP, UPP and RPP had similar TDM digestibility values, while the highest TDM digestibility was obtained in CPP. OM digestibility was different among the residues (p<0.05). CaP and CPP had the same ME value while CC, UPP and RPP had close ME values and GNS the least in ME (p<0.05). The potential extent (b) and rate (c) of gas production were statistical different among the residues (p<0.05). The Hohenheim gas test gave high in vitro organic matter (OM) digestibility for CC, CaP, UPP and RPP and CPP. Fermentable carbohydrates and probably available nitrogen in the crop residues influenced net gas production. The results showed that crop residues besides, providing bulk are also a source of energy and fermentable products which could be used in ruminant livestock production in the tropics.

• 수산해양기술연구
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• 제36권3호
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• pp.244-248
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• 2000

199년경 한국 남해안 어선의 특징은 독창적이고 견고하여 한반도 주변의 해양조건에 적합하고 우리 선조들의 훌륭한 조선기술을 확인할 수 있었으며, 그 결과를 요약하면 다음과 같다. (1) 본 연구에 사용한 시험대상 어선은 고대 어선에 비하여 비교적 세형으로서 1900년경의 선형이 개량되었음을 알 수 있었다. (2) 용골은 각형단면인 방형용골(bar keel)로 되어 있으며, 선수부는 방형선수재의 구조로서 예리한 pointed stem을 이루고 있다. (3) 외판은 턱붙이 클링커 이음방법으로 접합되어 있었다. (4) 권형망어선의 L/B, L/D, B/D의 값이 자망어선의 값에 비하여 크게 나타났다. (5) 복원성은 두 선박이 양호한 편이며 권형망어선이 자망어선에 비해서 더 우수한 것으로 나타났다.

• Asian-Australasian Journal of Animal Sciences
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• 제24권9호
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• pp.1282-1287
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• 2011

The objective of this study was to assess the effect of xylanase on net energy for production, performance, nutrient digestion and gut microflora of broilers fed corn/soy-based diet. Eighty-four day-old male broiler chicks were allocated to two groups receiving two treatments, respectively. Each treatment had six replicate cages with seven broilers per cage. The diets were based on corn and soybean. The treatments were: i) basal diet reduced in apparent metabolizable energy (-0.63 MJ/kg compared to commercial diet specifications); ii) basal diet supplemented xylanase at 4,000 u/kg feed. The experiment used the auto-control, open circuit respiration calorimetry apparatus to examine the heat production and net energy for production. The results revealed that xylanase supplementation did not affect growth performance and diet AME value, but increased $NE_p$ value by 18.2% (p<0.05) and decreased daily heat production per $kg^{0.75}$ by 31.7% (p<0.05). There was no effect (p>0.05) of xylanase supplementation on the ileal digestibility of N and hemicelluloses, but the ileum digestibility of energy was increased by 2% by xylanase supplementation (p<0.05). Xylanase supplementation increased (p<0.05) the count of lactobacillus and bifidobacterial in the caecum.

• Asian-Australasian Journal of Animal Sciences
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• 제17권10호
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• pp.1452-1458
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• 2004

An experiment was conducted to examine the effects of sex and market weight on performance, carcass characteristics and pork quality. A total of 224 crossbred pigs (initially 26.64 kg BW) were allotted in a $2{\times}4$ factorial arrangement in a randomized complete block (RCB) design. The variables were sex (gilts and barrows) and different market weights (100, 110, 120 and 130 kg). Average daily gain (ADG) and average daily feed intake (ADFI) were significantly higher (p<0.01) in barrows than gilts, ADFI and feed conversion ratio (FCR) increased as body weight increased (p<0.05). Gender differences were observed in carcass characteristics. Backfat thickness and drip loss were greater in barrows (p<0.01), while loin eye area (p<0.01), flavor score (p<0.05) and lean content (p<0.001) were higher in gilts. Carcass grade and water holding capacity were the highest in 110 kg market weight pigs. The 100 kg arket weight pigs showed lower juiciness, tenderness, shear forces and total palatability than the other market weights (p<0.01). Hunter values (L*, a* and b*) were increased as market weight increased (p<0.05). Hunter a* value was greater in gilts (p<0.01) but L* value and b* value were not affected by sex of pigs. Net profit [(carcass weight${\times}$price by carcass grade)-(total feed cost+cost of purchased pig)] was higher in gilts than barrows (p<0.01), and was higher (p<0.05) in the pigs marketed at 110 and 120 kg market weight compared with 100 kg market weight. These results demonstrated that gilts showed higher carcass characteristics, pork quality, feed cost per kg body weight gain and net profit compared with barrows. Moreover, 110 or 120 kg body weight would be the recommended market weight based on pork quality and net profit for swine producers.