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복합단백발효사료와 어분의 산란계에 대한 사양가치 비교시험
이강욱,김한경,주현규,박주식 ( K . W . Lee,H . K . Kim,H . K . Ju,J . S . Park ) 한국축산학회 1973 한국축산학회지 Vol.15 No.4
To compare the nutritive value of fish meal with that of fermented compound protein meal, the feeding trial with 288 laying hens of shaver strain was carried out for 8 weeks. The results obtained are as follows; 1. Experimental fermented compound protein meal contained less protein (39.5%) than imported fish meal (67%) and domestic fish meal (56%). However, moisture content of domestic fish meal (19.8%) was higher than that of fermented compound protein meal (10.6%) and imported fish meal (9.8%). It was found that the content of Ca, P and methionine in forign fish meal was superior to those in the fermented or domestic fish meal. 2. In growth rate, there was no statistical difference between the treatments. However, the amount of feed consumed was higher for the hens fed fermented compound protein meal than for those fed fish meal, although no significant difference was observed between the source of fish meal. 3. There was no statistical significance among the treatment in egg production and egg weight, but the hens feed fermented compound protein meal produced a little more eggs of heavier egg weight than those fed control diet. 4. These results indicate that fermented compound protein meal up to 10% level can be used in the laying hens diet satisfactorily.
Market Structure Analysis of International Construction Revenue: A Country Level Analysis
이강욱,김두연 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.12
As project sizes and complexity have increased over the past few decades, the international construction industry has gradually developed into a country-level competition. The international construction industry is heterogeneous and involves different firms from diverse countries; it tends to be dynamic in terms of where firms enter and exit and grow and decay. To maintain the competitiveness of a country, it is essential to understand market structure based on a systematic diagnosis of its recent performance. This study analyzes the revenue structure of top international contractors (TIC’s) to investigate country-specific factors in the international construction industry. Using data from the Engineering News-Record’s (ENR’s) Top 250/225 International Contractors list produced over the last ten-year period (2009–2019), the international revenue performances of TIC’s were analyzed for 12 major countries both statically (market concentration) and dynamically (market mobility and instability). The analysis results show that the competition for TIC’s has become more intense, particularly due to newly industrialized countries (NIC’s), and in most countries, the market position was found to be unstable. This study further classifies 12 countries into four types (high-static, high-dynamic; high-static, low-dynamic; low-static, high-dynamic; and low-static, low-dynamic countries) using both static and dynamic indices. The combination of static and dynamic indices is found to be helpful for understanding the underlying competitive forces and can be utilized as a strategic reference for benchmarking.
이강욱,심재민,김동욱,Zhuang Yao,김정아,김현진,김정환 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.2
Kimchi was prepared with different types of salts: purified salt (PS), solar salt aged for 1 year (SS1), aged for 3 years (SS3), and bamboo salt (BS). Kimchi inoculated with Leuconostoc mesenteroides P30 (starter kimchi), and control kimchi (non-starter kimchi) were prepared, and stored at – 1 °C for 20 weeks. Titratable acidity values increased slowly and reached 0.96– 1.01% (pH 3.73–3.83) at 20 weeks. Proportions of coccustype lactic acid bacteria (LAB) among total LAB were higher in SS kimchi than PS kimchi. Among non-starter kimchi, the proportions were 44.7, 41.6, 29.7, and 32.1% for SS3, SS1, BS, and PS kimchi, respectively, at 2 weeks, and 11.5, 12.8, 6.7, and 5.8%, respectively, at 20 weeks. SS kimchi had much less yeast counts than PS kimchi. Among starter kimchi, yeasts were detected from PS kimchi at 10 weeks but not detected until 18 weeks from SS1 and BS kimchi and 20 weeks from SS3 kimchi.
패널데이터를 활용한 COVID-19 발병 전후의 사회적 고립감 비교
이강욱 한국상담심리교육복지학회 2023 상담심리교육복지 Vol.10 No.3
본 연구는 인구통계학적 특성에 따라 COVID-19 발병 전후 사회적 고립감이 어떻게 변화했는지살펴보고, 사회적 고립감을 완충하기 위한 개입방안 모색에 근거자료를 제공하고자 수행되었다. 이를 위해 한국행정연구원이 발표한 2019년과 2021년 패널데이터를 이용하여 SPSS 21.0 프로그램으로분석하였다. 2019년 데이터는 COVID-19 이전 상황을, 2021년 데이터는 COVID-19 이후 상황을 나타낸다. 연구결과 외로움을 느끼는 정도, 자살하고 싶은 생각이 드는 정도, 아무도 나를 잘 알지 못한다고 느끼는 정도와 같은 사회적 고립감은 COVID-19 발병 이후 전반적으로 증가하였으나 일용근로자의 경우에는 감소한 것으로 나타났다. 또한 성별, 연령, 교육 수준에 따라 분류된 그룹 간에도사회적 고립감의 차이가 관찰되었다. COVID-19 이후 집단 심리방역이 더욱 중요해짐에 따라 인구통계학적 특성 외에 사회적 고립감에 영향을 미칠 수 있는 다양한 요인에 대한 연구가 필요하다.
李康郁 건국대학교 1976 學術誌 Vol.20 No.2
A total of 142 quarter milk samples from 7 herds were examined for mastitis and the results obtained as follows : 1.Staphylococcus (39.06%) and streptococcus (34.90%) were two main causative organisms of mastitis. Pseudomonas Spp (5.83%), escherichia coli (2.60%), proteus (2.60%), klebsiella aerobacter (1.04%), corynebacterium (0.52%) and fungi (0.52%) were also isolated from the infected quarters. 2.The isolated were more sensitive to chloramphenicol (91.46%), leukomycin (76.83%), tetracyclin (75.61%) kanamycin (69.51%) and oreandomycin (62.80%). On the other hand, they were less senstive to colistin (7.93%), penicillin (34.76%), sulfisoxazole (39.63%), streptomycin (53.05%) and erythromycin (56.71%). Especially the straine of pseudomonas Spp. isolated from the infected quarters were resistant to almost all the drugs examined.