• 기술혁신학회지
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• 제14권2호
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• pp.373-404
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• 2011

본 연구의 목적은 혁신활동이 기업의 경영성과에 미치는 영향을 밝히는 데 있다. 이러한 연구는 1960년대 이후 활발하게 진행되어 왔는데, 이론과 달리, 실증분석에서는 혼재된 결과가 나타났다. 실증분석 결과가 이론과 다론 이유는 많이 있지만, 사용되는 통계와 분석 방법의 차이에 기인하는 바가 크다. 본 연구는 이러한 문제의식의 연장선상에서 통계문제를 최소화하기 위해 노력하였다. 특히, 이용 가능한 통계를 최대한 활용하기 위해, 특허청에서 제공되는 특허 출원건수의 전수통계(1990~2008)를, 연구개발은 한국신용평가기관에서 제공되는 연구개발비용 통계(1990~2008)를 사용하였다. 본 연구의 가장 큰 의의는 바로 방대한 통계작업이라 할 수 있다. 적절한 지표 산정을 위해, 주성분 분석을 활용하여 혁신성 지수를 산출하였고, 기업 패널분석과 고성장 기업의 분석에 적절한 분위수 추정을 함께 사용하여 다양한 유형의 기업들에게 미치는 효과를 측정하였다. 분석결과를 보면, 패널 분석에서는 혁신활동이 기업의 경영성과에 미치는 영향이 유의적이지 않지만, 분위수 추정에서는 이와 다른 결론을 도출하였다. 특히, 하위 10%에 해당하는 저성장기업에게는 혁신이 유의하지 않지만, 상위 10%의 고성장 기업에게는 혁신활동이 매우 중요한 영향을 끼치는 것으로 나타난다. 혁신활동이 대기업보다 중소기업에 보다 큰 영향을 미치는 것으로 나타난 점 역시 커다란 시사점이라 할 수 있다.

• Advances in concrete construction
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• 제12권6호
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• pp.451-459
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• 2021

The mechanical behaviors and chloride resistance performance of fiber reinforced cementitious composites (FRCC) with hybrid polyethylene (PE) and steel fiber (in total 2% by volume) were investigated. Based on micro-mechanics and fracture mechanics, the reason why the tensile strain capacity of FRCC changed obviously was obtained. Besides, the effects of the total surface area of fiber in FRCC on compressive strength and chloride content were clarified. It is found that the improvement of the tensile strain capacity of FRCC with hybrid fiber is attributed to the growth of strain-hardening performance index (the ratio of complementary energy to crack tip toughness). As the total surface area of fiber related with the interfacial transition zone (ITZ) between fiber and matrix increases, compressive strength decreases obviously. Since the total surface area of fiber is small, the chloride resistance performance of FRCC with hybrid PE and steel fiber is better than that of FRCC containing only PE fiber.

• 한국산림과학회지
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• 제99권1호
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• pp.85-95
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• 2010

비료주기는 묘목의 생산성과 품질을 향상시키는 방법으로 이용되어 왔다. 이 연구의 목적은 경제림 육성 수종인 물푸레나무, 들메나무, 잣나무, 전나무를 대상으로 포지에서 질소, 인, 칼륨 비료주기가 묘목의 생장과 양분변화에 미치는 영향을 정량적으로 측정하는 것이다. 비료주기에 대한 생장반응과 양분 동태를 각각 품질지수(Dickson's quality index, QI)와 양분벡터분석(Vector diagnosis)을 이용하여 분석하였다. 물푸레나무와 들메나무는 질소 비료 처리구에서 가장 높은 수고와 근원경 생장을 보였으며, 잣나무의 경우 질소 비료 처리구에서 수고 생장이 약간 감소했고, 전나무는 비료주기 효과가 없었다. 물푸레나무의 QI는 질소 비료 처리구에서 가장 높았고 칼륨 비료 처리구에서 가장 낮았다. 들메나무의 QI도 질소 비료 처리구에서 가장 높았고 대조구에서 가장 낮았다. 잣나무와 전나무의 QI는 비료주기 처리 간에 유의한 차이는 없었지만 인 비료 처리구에서 가장 낮은 값을 보였다. 질소 비료주기는 대조구에 비하여 물푸레나무, 들메나무, 잣나무, 전나무의 건중량을 각각 43, 41, 26, -9% 증가시켰고, 인 비료주기는 -2, 4, -11, -10% 증가시켰으며, 칼륨 비료주기는 -25, 23, 18, -11% 증가시켰다. 비료주기에 대한 양분벡터반응은 수종과 양분종류에 따라 상이한 경향이 나타났다. 예를 들면 물푸레나무의 경우 질소 비료주기에 대해 양분 N은 농도 변화 없이 양분함량이 증가하는 "양분최적" 상태를 보이고, 양분 P는 농도와 양분함량이 모두 감소하고, 양분 K는 농도 변화 없이 양분함량만 감소했다. 잣나무의 경우 질소 비료주기에 대해 양분 N, P, K 농도는 감소하고 양분함량은 증가하는 "양분희석" 현상이 나타났으며, 인 비료주기는 양분 N, P, K 농도 변화 없이 양분 함량이 감소하는 "과량집적" 현상이 나타났다. 묘목 생산 단계에서 우량한 것으로 판정된 묘목이 산지에서도 높은 적응성을 보이는지에 대한 연구가 향후 필요하지만, 물푸레나무와 들메나무의 경우 질소 비료주기 처리에서 높은 산지 적응성을 보일 것으로 예상된다.

• Asian-Australasian Journal of Animal Sciences
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• 제28권2호
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• pp.207-214
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• 2015

The effects of high carbohydrate diet on growth, serum physiological response, and hepatic heat shock protein 70 expression in Wuchang bream were determined at $25^{\circ}C$ and $30^{\circ}C$. At each temperature, the fish fed the control diet (31% CHO) had significantly higher weight gain, specific growth rate, protein efficiency ratio and hepatic glucose-6-phosphatase activities, lower feed conversion ratio and hepatosomatic index (HSI), whole crude lipid, serum glucose, hepatic glucokinase (GK) activity than those fed the high-carbohydrate diet (47% CHO) (p<0.05). The fish reared at $25^{\circ}C$ had significantly higher whole body crude protein and ash, serum cholesterol and triglyceride, hepatic G-6-Pase activity, lower glycogen content and relative levels of hepatic growth hormone (GH) gene expression than those reared at $30^{\circ}C$ (p<0.05). Significant interaction between temperature and diet was found for HSI, condition factor, hepatic GK activity and the relative levels of hepatic GH gene expression (p<0.05).

• 한국수자원학회논문집
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• 제54권9호
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• pp.681-692
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• 2021

식생 프로세스는 증발산 제어를 통해 강우 유출 프로세스에 상당한 영향을 미치지만, 개념적인 집중형 수문 모형에서는 거의 고려되지 않는다. 본 연구는 인공위성에서 원격으로 감지된 엽면적지수 자료를 표현하는 생태 모듈을 수문 분할 모듈에 통합하여 합천댐 유역에 대한 모형 성능을 평가하였다. 제안된 생태 수문 모형은 습윤 지역의 생태수문 프로세스를 더 잘 표현하기 위하여 크게 세 가지 주요한 특징을 가진다. 1) 식생의 성장률은 유역의 물 부족 스트레스에 의해 제약을 받는다. 2) 식생의 최대 성장은 유역 기후에 의한 에너지에 의해 제약을 받는다. 3) 식생과 대수층의 상호작용이 반영된다. 제안된 모형은 유역 단위의 수문 성분과 식생 동역학을 동시에 모의한다. SCEM 알고리즘에 의해 추정된 모형 매개변수를 이용한 검증 결과로부터 아래와 같은 발견할 수 있었다. 1) 엽면적지수와 하천유량 자료를 이용하여 생태수문모형의 매개변수를 추정하는 것이 생태 모듈이 없는 수문 모형과 비슷한 정확도 및 견고함으로 하천유량을 예측할 수 있다. 2) 필터링이 안된 원격으로 감지된 엽면적지수를 그대로 입력자료로 이용하는 것은 하천유량 예측에 도움이 안된다. 3) 통합된 생태수문모형은 엽면적지수의 계절적인 변동성에 대한 우수한 추정치를 제공할 수 있다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권7호
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• pp.1008-1013
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• 2001

This experiment was conducted to determine the effects of enzyme supplementation on the performance of 80 growing-finishing pigs (26.2 kg) fed diets containing either soybean or canola meal. Barley-based diets formulated using either soybean meal or canola meal were fed with or without enzyme (Allzyme Vegpro, Alltech Biotechnology Centre). Eight castrates and twelve gilts were fed each diet. Digestibility of dry matter, crude protein and gross energy was 8.0 (p=0.0001), 7.9 (p=0.0005) and 7.9 (p=0.0003) percent lower for pigs fed diets containing canola meal compared with soybean meal. Enzyme supplementation had no effect on nutrient digestibility (p>0.05). There was a significant interaction between protein source and enzyme for all three nutrients. Over the entire experimental period (26.2 to 77.9 kg), pigs fed canola meal consumed 9.4% less feed (p=0.001), gained weight 20.4% slower (p=0.001) and had a 12.9% poorer feed conversion (p=0.001) than pigs fed soybean meal. Weight gain, feed intake and feed conversion were unaffected by enzyme addition (p>0.05). Castrates gained weight 11.4% faster (p=0.001), consumed 9.3% more feed (p=0.001) and had a 2.6% better feed conversion (p=0.026) than gilts. There was a significant interaction between protein source and sex of pig for feed conversion. Pigs fed diets based on canola meal had a significantly lower carcass value index (p=0.01), lower lean yield (p=0.007) and lower lean depth over the loin (p=0.001) than pigs fed diets based on soybean meal. Enzyme addition significantly increased lean depth over the loin (p=0.01). There was a significant interaction between protein source and enzyme for carcass value index (p=0.04), estimated lean yield (p=0.05) and fat depth over the loin (p=0.05). These results confirm previous studies which have demonstrated poorer pig performance when canola meal completely replaces soybean meal in diets fed to growing-finishing pigs. In addition, the results provide little justification for the inclusion of the Vegpro enzyme in diets fed to pigs of this weight range.

• Advances in nano research
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• 제9권1호
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• pp.15-24
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• 2020

Iron has a crucial role in growth as part of metalo-proteins like haemoglobin or myoglobin, enzymes; they are also involved in energetic reactions. Iron plays a vital role in fertility. At high doses, Iron has a harmful consequence on the reproductive system, which can be strongly reflected the final stage of spermatogenesis. Nutritional products are claiming to use nanotechnology and it is important to recognize the potential toxicity of nano-sized nutrients. Recently iron nanoparticles were proposed as a food additive for poultry. The objective of this study was to investigate the effects of L-cystein coated iron oxide nanoparticles on reproductive performance in male quails. The results of Fourier Transform Infrared Spectrometer, Alternating Gradient Force Magnetometer and Scaning Electron Microscopy showed that iron oxide nanoparticles was produced and have been coated with L-cycstein (Fe₃O₄-Cys NPs). A total of 100 one-week-old quail chicks were randomly placed to five groups of five replicates. Four quails (two male and two females) were raised in an individual cage for each replicate. The five experimental treatment diets consisted; negative control diet, with no Iron supplementation; positive control diet supplemented with 60 mg/kg of Fe₃O₄; treatment diets supplemented with 0.6, 6 and 60 mg/kg of L-cystein coated iron oxide nanoparticles. The hemoglobin, Red blood cell, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, gonadal somatic index, daily sperm production, total testicular sperm and sperm viability of the male quails that were fed with diet supplemented by 0.6 mg/kg of Fe₃O₄-Cys NPs were improved as compare with negative control. This study showed that not only the use of the Fe₃O₄-Cys nanoparticles had no side effects but also it can be used as a feed additive to improve the reproductive performance in male quails.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.307-318
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• 2021

The objective of this study is to analyze the performance of Islamic banks with the Maqashid Shariah approach. The analysis technique used is the Simple Additive Weighting Method (SAW) to solve multi-attribute decision problems. The sampling technique used was purposive sampling while the data came from the annual report of each bank. The results showed that the BTPN Shariah (BTPNS) and Bank Muamalat Indonesia (BMI) are ranked first and second respectively on the Maqashid Shariah Index (MSI) with values of 0.265429 and 0.237110 respectively. Panin Dubai Shariah Bank (PDSB) ranked third with an MSI value of 0.180733, followed by BCA Shariah which ranked fourth with an MSI value of 0.151299. BRI Shariah ranked fifth with an MSI value of 0.128606, followed by BNI Shariah which ranked sixth with an MSI value of 0.124661. Bank Mega Shariah ranked last with an MSI value of 0.087068. Furthermore, there is a relationship (correlation) between ROE, ROA, and OEOI and MSI since each data has a value of 0.000, 0.000, 0.050, and 0.001 respectively, which is smaller than the significance value of 0.05. On the other hand, NPF, TPF, and Asset Growth Rates do not correlate with the MSI since each data has a value of 0.051, 0.252, and 0.215 respectively which is greater than the significance value of 0.05.

• Journal of Animal Science and Technology
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• 제65권4호
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• pp.804-817
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• 2023

This study was conducted to evaluate the effects of co-dried fish protein hydrolysate (CFPH) on broilers performance, intestinal microbiology, and cellular immune responses. Five hundred one-day-old (Ross 308) male broilers were allocated to four treatments with five replicates of 25 birds in a completely randomized design. The experimental treatments included four levels of CFPH (0% as the control, 2.5%, 5%, and 7.5%) in the isonitrogenous and isocaloric diets. During the experiment, body weight (BW) and feed intake (FI) were periodically recorded in addition to calculating average daily gain (ADG), feed conversion ratio (FCR), liveability index, and European broiler index (EBI). In addition, cellular immune responses were evaluated at 30 days of age. On day 42, ileal contents were obtained to examine the microbial population. Based on the findings, Dietary supplementation of 5 and 7.5% CFPH increased the percentage of the thigh while decreasing the relative weight of the gizzard compared to the control group. The highest relative length of jejunum was observed in birds receiving 2.5 and 5% CFPH, and its highest relative weight belonged to birds fed with 5% CFPH. The number of coliforms, enterobacters, and total gram-negative bacteria in the intestines of birds receiving CFPH was less than that of the control group. In general, the application of CFPH in broiler nutrition can decrease the level of soybean meal in diet and it can be considered as a new protein supplement in poultry production. It is suggested to study the incorporation of this new supplement in other livestock's diets.

• Animal Bioscience
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• 제37권1호
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• pp.142-150
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• 2024

Objective: This study was conducted to assess effects of heat stress on growth performance, physiological parameters, and blood profiles of Hanwoo steers during early-fattening period in climate chambers. Methods: Four Hanwoo steers (body weight, 454.3±10.9 kg; age, 14±0.1 month) were allocated into four levels of temperature-humidity index (THI) in a 4×4 Latin square design for 21 days (pre-adaptation, 7 d; heat stress, 7 d; post-adaptation, 7 d) per period. Experimental treatments were assigned according to THI chart based on National Institute Animal Science (NIAS, 2022): Comfort (25.5℃ to 26.5℃, 60%; THI 73 to 75), Mild (28℃ to 29℃, 60%; THI 77 to 79), Moderate (29.5℃ to 30.5℃, 80%; THI 82 to 84), and Severe (31℃ to 32℃, 80%; THI 85 to 86) in separate climatic controlled chambers. Results: The dry matter intake (DMI) of the formula feed was lower in Severe compared to Mild and Comfort (p<0.05). The DMI of rice straw was the lowest in Severe and lower in Moderate than Comfort and Mild (p<0.05). Both average daily gain and feed conversion ratio of Severe and Moderate were lower than those of Mild and Comfort (p<0.05). Water intake was the highest in Severe and lower in Moderate compared with Comfort and Mild (p<0.05). Heart rate and rectal temperature increased as THI level increased (p<0.05). Glucose was the lowest in Severe and lower in Moderate compared to Comfort (p<0.05). On the contrary, non-esterified fatty acid was the highest in Severe and lower in Moderate compared with Comfort (p<0.05). Blood urea nitrogen of Moderate and Severe were higher than those of Comfort and Mild (p<0.05). Cortisol increased as THI increased (p<0.05). Conclusion: This study demonstrated the negative effects of heat stress on the performance and physiological responses of Hanwoo steers during the early-fattening period. In addition, it is judged that the THI chart for Hanwoo steers of National Institute of Animal Science (2022) was properly calculated.