• 펄프종이기술
• /
• 제32권3호
• /
• pp.57-64
• /
• 2000

This study was carried out to acquire basic data necessary for the use of non-wood pulp. It investigated various chemical pulping methods using bamboo to achieve higher yield lower kappa no. and then the physical properties of various pulps were tested. The results of this study were as follows. When various chemical pulps(Soda, Soda-AQ, Soda-AQ-H2O2, Soda-urea, AS, AS-AQ, Kraft) were produced with bamboo. the pulps with the higher yield and lower kappa no. were AS-AQ and Kraft. In the case of the breaking length Soda pulps(5.77∼6.46 km) showed the greatest and Soda-urea pulps(3.81∼4.522km) showed the lower value. Similarly for the burst index Soda pulps (3.28∼3.50 kPa$.$m2/g) were the best and Soda-urea pulps(2.29∼2.39 kPa$.$m2/g) were worst. On the other hand the tearing indexes of AS-AQ pulps(73.6∼89.7mN$.$m2/g) showed the tendency which was higher then those of other pulps.

• 대한안전경영과학회지
• /
• 제14권3호
• /
• pp.127-134
• /
• 2012

Plant safety management that is enforcing introducing more than 95% in domestic manufacturing industry is using total plant efficiency by the evaluation index, and as a result, can see a lot of examples that plant productivity, economy and safety is increased. The efficient safety estimation for a business should analyze an accident data by considering every possible and potential factor. This study's purpose centers plant safety management activities that is management system for plant production and safety efficiency's maximization, plant evaluation system that plant safety management activities factor(reliability, maitainability, safety, service quality) that is enforcing in manufacturing industry can develop evaluation model that can evaluate qualitative activities by quantitative activities in process that maximize plant safety management wishes to do design.

• 한국산업융합학회 논문집
• /
• 제4권2호
• /
• pp.185-191
• /
• 2001

Diphenylpropylamidophosphate(DPPAP) was synthesized as flame retardant for Expanded Polystyrene(EPS). Structure of DPPAP was investigated by the m, NMR, DSC. We make FR panels with EPS beads which treated with DPPAP and expanded by expand machines. FR panels were used in this study after formation by form machines and then cutting by cutting machines. The following conclusions were obtained: 1. The new synthetic agent was developed without the use of solvent such as pyridine or tertiary amine in the synthesis of DPPAP which served as flame retardant for EPS. 2. The flame retandancy effect of EPS treated with DPPAP was found excellent in LOI tests. 3. The properties of FR EPS panels treated with DPPAP did not difference.

• 토지주택연구
• /
• 제11권3호
• /
• pp.11-19
• /
• 2020

This study aims to examine the relationship between the improvement of the income distribution index from the late 1980s to the 1990s and large-scale housing supply projects such as the 2 million housing construction project. Looking at Korea's economic development in terms of income growth and distribution, GDP has continuously increased since the establishment of the government, especially in the late 1980s. The Gini Index, a representative income inequality index, rapidly deteriorated in the early 1970s, and gradually improved from the late 1980s. The 2 million housing construction project, announced in 1988, supplied a third of the existing nationwide housing stock of 6.5 million units in three years. The project cost was 65 trillion won, equivalent to 50% of Korea's GDP at the time. This study questioned whether the ratio of the number of employed workers in the construction industry was a variable directly affecting the Gini Index. To verify this, the causal relationship between the proportion of employed workers in the construction and manufacturing industries and the Gini Index from 1979 to 2008 was statistically analyzed. For this, the ARIMA model was established for each variable, and the correlation of their residuals was verified. The 2 million housing construction project had the effect of improving income inequality in terms of rising wages for production workers and creating jobs for the low-educated and low-income class. During the project period, the number of middle-income earners increased sharply, and the income gap between the high-income and low-income earners greatly decreased. The expansion of the construction volume can be used as a powerful and direct policy tool for improving income distribution. However, the effect may be limited. When the proportion of workers exceeds the threshold, the effect is weakened.

• 유통과학연구
• /
• 제13권11호
• /
• pp.39-46
• /
• 2015

Purpose - In Korea, there has been a recent trend that shows housing prices have risen rapidly following the International Monetary Fund crisis. The rapid rise in housing prices is spreading recognition of this as a factor in housing price volatility. In addition, this raises the expectations of housing prices in the future. These expectations are based on the assumption that a relationship exists between the current housing prices and expected housing prices in the real estate industry. By performing an empirical analysis on the validity of the claim that an increase in current housing prices can be correlated with expected housing prices, this study examines whether a long-term equilibrium relationship exists between expected housing prices and existing housing prices. If such a relationship exists, the recovery of equilibrium from disequilibrium is analyzed to derive related implications. Research design, data, and methodology - The relationship between current housing prices and expected housing prices was analyzed empirically using the Vector Error Correction Model. This model was applied to the co-integration test, the long-term equilibrium equation among variables, and the causality test. The housing prices used in the analysis were based on the National Housing Price Trend Survey released by Kookmin Bank. Additionally, the Index of Industrial Product and the Consumer Price Index were also used and were obtained from the Bank of Korea ECOS. The monthly data analyzed were from January 1987 to May 2015. Results - First, a long-term equilibrium relationship was established as one co-integration between current housing price distribution and expected housing prices. Second, the sign of the long-term equilibrium relationship variable was consistent with the theoretical sign, with the elasticity of housing price distribution to expected housing price, the industrial production, and the consumer price volatility revealed as 1.600, 0.104,and 0.092, respectively. This implies that the long-term effect of expected housing price volatility on housing price distribution is more significant than that of the industrial production and consumer price volatility. Third, the sign of the coefficient of the error correction term coincided with the theoretical sign. The absolute value of the coefficient of the correction term in the industrial production equation was 0.006, significantly larger than the coefficients for the expected housing price and the consumer price equation. In case of divergence from the long-term equilibrium relationship, the state of equilibrium will be restored through changes in the interest rate. Fourth, housing-price volatility was found to be causal to expected housing price, and was shown to be bi-directionally causal to industrial production. Conclusions - Based on the finding of this study, it is required to relieve the association between current housing price distribution and expected housing price by using property taxes and the loan-to-value policy to stabilize the housing market. Further, the relationship between housing price distribution and expected housing price can be examined and tested using a sophisticated methodology and policy variables.

• 한국콘텐츠학회논문지
• /
• 제21권7호
• /
• pp.363-373
• /
• 2021

본 연구는 허난성 산업연관표를 활용하여 중국 허난성 문화창의산업에 대한 경제적 파급효과의 분석 결과를 바탕으로 문화창의산업의 미래지향적인 시사점을 제시하는 데 목적을 두고 있다. 본 연구를 위해 중국 허난성 통계국의 2017년 산업연관표의 42개 산업 중 문화·체육·오락, 연구 및 시험 발전, 종합 기술 서비스, 정보 전송·컴퓨터 서비스 및 소프트웨어, 교육 등 5개 부문을 문화창의산업으로 분류하였다. 분석 결과는 다음과 같다. 허난성 문화창의산업의 총생산유발액은 48,848 십억 위안이며, 특히 허난성 문화창의산업 산업의 생산유발계수는 2.72809, 2.23909 (열 합계, 행 합계), 감응도계수 0.26325, 영향력계수 0.87535, 소득유발계수 0.55211, 생산세유발계수 0.09291 등을 보여주고 있다. 중국 허난성 문화창의산업은 발전할 잠재력이 충분히 있기 때문에 정부의 정책 지원 필요하고 법적 규정과 시장관리에 대한 감독이 요구되고 문화창의산업의 혁신력을 높이고 "문화창의산업+X" 융합 모델 개발도 필요하다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제16권1호
• /
• pp.70-76
• /
• 2003

Three experiments were conducted to determine the effects of a sorghum-specific enzyme system, derived from an Aspergillus niger and Bacillus subtilis fermentation extract (carbohydrase activity of 1,650 $\alpha$-amylase units and cellulase activity of 30 fibrinolytic units/mL), on growth performance of finishing pigs. In Exp. 1,192 pigs (average initial BW of 46.1 kg) were fed sorghum-based diets without or with 360 mL of enzyme system per ton of sorghum in a 78 d growth assay. For d 0 to 39, gain/feed was improved (p<0.03) with enzyme supplementation, but ADG was not affected (p>0.15). For d 39 to 78 and overall (d 0 to 78), ADG, gain/feed, and digestibilities of DM and N were not affected (p>0.13) by enzyme supplementation. Backfat thickness, fat-free lean index, and scores for stomach keratinization and ulcers also were not affected (p>0.15) by the dietary treatments. In Exp. 2,168 pigs (average initial BW of 58.4 kg) were fed diets without or with 150, 300, or 450 mL/ton of the same enzyme system used in Exp. 1. Adding as much as 450 mL enzyme system / ton of sorghum did not affect (p>0.15) ADG or gain/feed for d 0 to 29 of the growth assay. However, during d 29 to 63, ADG increased by 11% (linear effect, p<0.02) and gain/feed increased by 10% (linear effect, p<0.06) as enzyme concentration was increased from none to 450 mL/ton of sorghum. For the overall period (d 0 to 63), ADG tended to increase (p<0.08) with enzyme supplementation, but gain/feed and digestibilities of DM and N were not affected (p>0.14). Carcass characteristics (dressing percentage, backfat thickness, and fat free lean index) also were not affected (p>0.20) by addition of the enzyme system. In Exp. 3,176 pigs (average initial BW of 46.7 kg) were fed diets without or with 450, 900, or 1,350 mL/ton of the same enzyme system used in Exp. 1 and 2 in a 71 d growth assay. Adding up to 1,350 mL/ton of enzyme had no effects (p>0.15) on ADG, gain/feed, digestibilities of DM and N, and carcass characteristics (dressing percentage, backfat thickness, and fat-free lean index). In conclusion, finishing pigs fed diets with a sorghum-specific enzyme system showed some positive trends for improved growth performance, but those effects were not large and (or) consistent.

• 디지털정책학회지
• /
• 제2권4호
• /
• pp.17-23
• /
• 2023

본 논문에서는 중소 규모의 정밀 가공 기업에 대한 생산 가공의 개선을 위하여 기존 공정 방식에 제조 실행 시스템을 적용하고 정밀가공의 데이터를 통합하였다. 이에 따른 기업 내 공정 관리 시스템의 강화, 장비 운용 효율의 증대, 불량률 감소를 통한 생산성 향상 및 작업 공수 감소에 따른 원가 절감률의 차이를 비교 분석하였다. 그 결과 제조 실행 시스템 도입으로 인해 생산 업무 생산성이 7.0% 향상되었고, 제품 불량률은 0.1%p 개선되었다. 제조원가 절감은 10.0%, 납기 준수율은 1.1% 개선되었음을 확인하였다. 추후 본 연구에서 제안한 제조 실행 시스템을 기반으로 추가적인 스마트팩토리 기술을 적용하는 경우 PQCD 지표의 상승으로 인한 가공 산업의 매출 및 이익 증대가 예상된다.

• 농촌지도와개발
• /
• 제25권2호
• /
• pp.71-83
• /
• 2018

This study aims to analyze the competitiveness of agricultural products in Korea, China and Japan and the effect of increasing imports from Korea and China. and then we discussed how to cooperate in the agricultural trade field between the three countries. The results are summarized as follows. First, The intra-industry trade of agricultural products was the most active in Korea and China, followed by the intra-industry trade index between Korea and Japan. The intra-industry trade between China and Japan were the lowest. Second, The mutual complementarity of agricultural products trade between Korea, China and Japan is mostly high. Among them, Korea and Japan are the highest, while Japan and China have the lowest complementarity. Third, it was found that in tariff elimination, imports of rice and meat products increased the most, while the import growth rate of green tea, meat products and ginseng increased the most. Finally, the three countries in Korea, China, and Japan can consider the way to increase the trade of agricultural products in the region by internalizing the trade of complementary items while maintaining a constant level of production of mutually competitive products.

• 한국컴퓨터산업학회논문지
• /
• 제7권5호
• /
• pp.555-562
• /
• 2006

컴퓨터애니메이션은 영상, 음향, 기획, 아이디어를 활용할 수 있는 종합예술이다. 국내의 기술은 다른 나라에 비해 결코 뒤지지 않지만 창의력이나 내용면에서 아직 뒤쳐진다는 점을 감안하여 본 논문은 기술보다는 기획단계의 중요성을 고지하고 형식에 얽매이지 않는 자기만의 애니메이션을 제작할 수 있는 나레이티브 애니메이션을 소개하고자 한다. 디지털 애니메이션 산업에서 성공적인 작업은 전문적인 기술 그 이 상을 요구한다. 즉, 창의적인 통제, 경의로운 감각, 무한한 상상력을 필요로 한다. 비길바 없는 이 실무의 프로그램은 전통적이고 창의적이고 정통한 기술을 아울러 가지고 소프트웨어 기술자가 아닌 디지털 아티스트를 계발해야 한다. 특히 3D애니메이션과 게임에만 치중한 요즘 나레이티브 애니메이션의 특성을 인식하여 새로운 형식 질 높은 애니메이션 제작이 필요하다고 본다. 따라서 본 논문은 디지털 애니메이션 교육에 지표를 제시함으로써 많은 도움을 줄 것으로 기대된다.