• 산업융합연구
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• 제22권5호
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• pp.23-37
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• 2024

최근 4차 산업혁명이라 일컬어지는 디지털 기술의 급속한 변화와 시장 환경의 불규칙한 변화 속에서 기업에서는 첨단화, 융합화된 디지털 기술을 신속히 감지하고 포착하여, 조직에 맞게 적용하는 동적 디지털 역량이 핵심 요소라고 할 수 있다. 본 연구는 기업에서 디지털 리더십과 디지털 전환과의 관계에 영향을 미치는 다양한 요인들을 알아보는 데 목적이 있으며, 특히 조직의 동적 디지털 역량과 조직의 디지털 수용 의도의 매개 혹은 조절 효과를 실증 분석하고자 한다. 전국의 산업단지 내 미니클러스터 참여기업을 대상으로 설문조사를 수행하여 수집한 258부의 자료를 표본으로 가설을 검증하였다. 연구결과 동적 디지털 역량은 디지털 리더십과 디지털 전환과의 관계에서 유의한 매개효과를 보였고, 디지털 수용의도는 동적 디지털 역량과 디지털 전환과의 관계에서 조절효과를 보였다. 본 연구는 조직에서의 동적 디지털 역량, 디지털 수용의도의 개념과 측정항목을 체계화하였으며, 기업에서 디지털 전환 추진 시 동적 디지털 역량을 어떻게 측정 및 제고하고, 조직원의 디지털 수용의도를 어떻게 활용할 것인지에 관한 시사점을 제시하였다는 점에 의의가 있다.

• Steel and Composite Structures
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• 제50권3호
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• pp.281-298
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• 2024

Stainless steel bolts (SSB) are increasingly utilized in bolted steel connections due to their good mechanical performance and excellent corrosion resistance. Fire accidents, which commonly occur in engineering scenarios, pose a significant threat to the safety of steel frames. The post-fire behavior of SSB has a significant influence on the structural integrity of steel frames, and neglecting the effect of temperature can lead to serious accidents in engineering. Therefore, it is important to evaluate the performance of SSB at elevated temperatures and their residual strength after a fire incident. To investigate the mechanical behavior of SSB after fire, 114 bolts with grades A4-70 and A4-80, manufactured from 316L austenitic stainless steel, were subjected to elevated temperatures ranging from 20℃ to 1200℃. Two different cooling methods commonly employed in engineering, namely cooling at ambient temperatures (air cooling) and cooling in water (water cooling), were used to cool the bolts. Tensile tests were performed to examine the influence of elevated temperatures and cooling methods on the mechanical behavior of SSB. The results indicate that the temperature does not significantly affect the Young's modulus and the ultimate strength of SSB. Up to 500℃, the yield strength increases with temperature, but this trend reverses when the temperature exceeds 500℃. In contrast, the ultimate strain shows the opposite trend. The strain hardening exponent is not significantly influenced by the temperature until it reaches 500℃. The cooling methods employed have an insignificant impact on the performance of SSB. When compared to high-strength bolts, 316L austenitic SSB demonstrate superior fire resistance. Design models for the post-fire mechanical behavior of 316L austenitic SSB, encompassing parameters such as the elasticity modulus, yield strength, ultimate strength, ultimate strain, and strain hardening exponent, are proposed, and a more precise stress-strain model is recommended to predict the mechanical behavior of 316L austenitic SSB after a fire incident.

• Archives of Plastic Surgery
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• 제51권2호
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• pp.251-257
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• 2024

Background Plastic surgery has developed to benefit in a variety of challenging areas formerly handled by other disciplines. Medical students do not have a clear picture of plastic surgery as a career due to lacking scope, clinical practice, and understanding of plastic surgery as a clinical area of expertise, including general practitioners, nursing staff, medical trainees, and the general public, and misconceptions about the extent of reconstructive and plastic surgery. Methods A cross-sectional observational study was conducted on Kuwait University Medical students (2nd-7th Years) over a period of 1 month. A questionnaire and a consent form were provided to eligible students. The inclusion criteria were Kuwait University Medical students from 2nd to 7th Years with signed consent form. The response was collected via email sent in coordination with the Vice Dean of Student Affairs in the Faculty of Medicine. Using statistical package for the social sciences, responses were statistically analyzed. Pearson's chi-square test was used to calculate p-values, where p < 0.05 was considered statistically significant. Results A total of 244 eligible medical students, 121 males and 123 females, were included in the study, with a mean age of 21 (±2) years. Similarly, 126 (51.6%) were preclinical students (2nd-4th-year students), while 118 (48.4%) were clinical students (5th-7th-year students). About 79.8% of medical students believed that plastic surgery plays an essential role in trauma management, whereas 9.2% did not consider plastic surgery significant for trauma management. This study found that only 15.5% of medical students were interested in enrolling in plastic surgery residency after graduation, while 47.1% of students did not consider plastic surgery residency after graduation. However, 37.4% were uncertain. The two most driving factors in deciding on plastic surgery residency were expected income (61.8%) and lifestyle (14.3%). Conclusion Improving medical students' education quality can enhance their perception and awareness of plastic surgery. Students should be taught the broader scope of plastic surgery. The inclusion of formal training during undergraduation is the essence of time and should be added to or improved during plastic surgery rotations with more emphasis on reconstructive and hand/peripheral nerve surgery. Student-led interest groups can be a useful tool for educating students about their specialty.

• Animal Bioscience
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• 제37권8호
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• pp.1387-1397
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• 2024

Objective: The objective of the current study was to find out the independent and interactive effects of prilled fat supplementation with protein on the production performance of early lactating Nili Ravi buffaloes. Methods: Sixteen early lactating buffaloes (36.75±5.79 d in milk; mean±standard error) received 4 treatments in 4×4 Latin-square design according to 2×2 factorial arrangements. The dietary treatments were: i) low protein low fat, ii) low protein high fat, iii) high protein low fat, and iv) high protein high fat. The dietary treatments contained 2 protein (8.7% and 11.7% crude protein) and fat levels (2.6% and 4.6% ether extract) on a dry matter basis. Results: The yields of milk and fat increased with increasing protein and fat independently (p≤0.05). Energy-, protein-, and fat-corrected milk yields also increased with increasing protein and fat independently (p≤0.05). Increasing dietary protein increased the protein yield by 3.75% and lactose yield by 3.15% and increasing dietary fat supplies increased the fat contents by 3.93% (p≤0.05). Milk yield and fat-corrected milk to dry matter intake ratios were increased at high protein and high fat levels (p≤0.05). Milk nitrogen efficiency was unaffected by dietary fat (p>0.10), whereas it decreased with increasing protein supplies (p≤0.05). Plasma urea nitrogen and cholesterol were increased by increasing protein and fat levels, respectively (p≤0.05). The values of predicted methane production reduced with increasing dietary protein and fat. Conclusion: It is concluded that prilled fat and protein supplies increased milk and fat yield along with increased ratios of milk yield and fat-corrected milk yields to dry matter intake. However, no interaction was observed between prilled fat and protein supplementation for production parameters, body weight, body condition score and blood metabolites. Predicted methane production decreased with increasing protein and fat levels.

• Animal Bioscience
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• 제37권7호
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• pp.1225-1235
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• 2024

Objective: The objective of the study was to determine the effects of feeding fermented cassava leaf meal (FCLM) on growth performance, carcass characteristics and meat sensory evaluation of broiler chickens. Methods: A total of 160 Cobb-500 chickens were used during the phases of growing (21 days of age; initial weight 0.39±0.025 kg/bird) and finishing (35 days of age; initial weight 1.023±0.164 kg/bird). The whole experiment lasted for four weeks. The FCLM was included in starter and finishing diets at 0, 50, 100, and 150 g/kg inclusion levels. Total feed intake (TFI), weight gain (WG), feed conversion ratio, and nutrient digestibility were recorded. Sensory evaluation of breast meat was used to determine the eating quality of the meat prepared using roasting and boiling methods. Results: The TFI and WG decreased (p<0.05) with increasing inclusion levels of FCLM in the diets of growing chickens. Crude protein digestibility for chickens fed 0 and 50 g/kg FCLM was higher (p<0.05) than for chickens subjected to a diet with 150 g/kg FCLM. During the finishing phase, TFI increased linearly (p<0.05) with increasing inclusion level of FCLM in chicken diets, while WG decreased (p<0.05) with inclusion level of FCLM. Treatment diets had no effect (p>0.05) on the eating qualities of breast meat. However, juiciness was significant (p<0.05) for the cooking method and treatment interaction. At 50 g/kg inclusion level, boiled meat had a higher (p<0.05) juiciness score than roasted meat. Tenderness, on the other hand, was significant (p<0.05) for the interaction of gender and treatment. Females considered the boiled meat to be more tender than the males at 150 g/kg inclusion level. Using principal component analysis, a positive correlation was observed between teeth adhesion and fibrousness, flavour and juiciness, and springiness and tenderness. Conclusion: From the study, it can be concluded that FCLM can be used as an ingredient in the diets of broiler chickens. Inclusion level of 50 g/kg can be used in chicken diets during the growing phase, whereas in the finishing phase, inclusion level of 150 g/kg FCLM can be used. The FCLM did not affect the eating quality of breast meat.

• 실천공학교육논문지
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• 제16권3_spc호
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• pp.309-325
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• 2024

이 연구의 목적은 LINC 3.0 기술혁신선도형 사업운영의 객관적 검증과 성과분석을 위한 자체평가지표를 개발하는 데 있다. 이러한 목적을 달성하기 위해 인력양성 분야와 기술개발 및 사업화 분야의 평가지표를 개발하고 그 타당성을 검증하였다. 이를 위해 평가관련 선행연구 및 유사사례를 조사하여 평가모델 및 체계를 구성하고 평가지표를 개발하였다. 개발한 평가지표 및 척도는 2회의 델파이조사를 통해 타당성을 확보하였다. 연구결과, LINC 3.0 자체평가지표는 인력양성 분야와 기술개발 및 사업화 분야로 구분, 총 66개의 평가지표를 개발하였다. 인력양성 분야는 평가항목 13개, 평가지표 38개로 개발하였고, 기술개발 및 사업화 분야는 평가항목 12개, 평가지표 28개를 도출하였다. 본 연구는 LINC 3.0 사업의 자체평가지표를 개발함으로써 대학 산학협력 모델의 객관적 검증과 타당성을 높이는 방안을 제시하였다는 의의를 갖는다. 연구에서 개발한 평가지표에 대해서는 현장활용성을 토대로 지속적으로 고도화 작업이 필요하며, 평가결과 도출된 우수사례의 공유·확산을 통해 대학교육의 질적 수준을 높이고 경쟁력을 강화하는 것이 필요하다.

• 인삼문화
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• 제6권
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• pp.13-34
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• 2024

The abolishment of the red ginseng monopoly act by the Korean government in 1996 resulted in a drastic change in the Korean ginseng industry, leading to a significant increase in the market size and consumption of ginseng products. Red ginseng is most popular type, with approximately 74% of harvested fresh ginseng being processed into various red ginseng products. Since 1997, there has been a substantial increase in the cultivation of ginseng for production of red ginseng, which, in turn, has contributed to the proliferation of ginseng processing companies. To investigate the products of ginseng manufacturing businesses, we select 200 companies primarily engaged in ginseng processing or specializing solely in ginseng. Our survey on the status of ginseng industry covered 8 different categories. 1) Root ginseng: There were 66 companies involved in manufacturing red ginseng root, accounting for 33.0% of all surveyed companies. This was followed by black ginseng root with 36 companies (18.0%) and red ginseng fine roots with 22 companies (11%). 2) Red ginseng products: A total of 144 companies were involved in manufacturing red ginseng pouches, making it the most common product category. This was closely followed by 142 companies producing pure(100%) red ginseng extract concentrate. 3) Fermented red ginseng products: Companies producing fermented red ginseng extract concentrate products were the most numerous, totaling 26. Following this, companies producing fermented red ginseng stick and pouch products were next in line. 4) Ginseng products: There were 15 companies involved in the production of ginseng products, with the majority focusing on ginseng tea. 5) Black ginseng products: Companies producing black ginseng extract concentrate were the most numerous, with 31 companies, followed by 26 companies producing black ginseng extract pouches. 6) Taegeuk ginseng products: Only 5 companies were involved in the production of taegeuk ginseng products. 7) Fermented black ginseng, and 8) Ginseng berry products: These categories are manufactured by less than 5 companies each. However, the variety in ginseng berry products suggests the potential for future growth. In the 2000s, a trend emerged with the development of new processed products aimed at enhancing the functional components of red ginseng, and these products have captured the attention of consumers. However, this study primarily focuses on black ginseng, fermented red ginseng/fermented black ginseng, and ginseng berry products as they have exerted a significant influence on the overall ginseng industry.

• 문화기술의 융합
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• 제10권1호
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• pp.183-192
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• 2024

한미 방위비분담금은 1991년 1,073억 원을 부담하는 것으로 시작되었고, 2021년 1조 1,833억 원을 부담하는 것으로 규모가 점차 증가하고 있으며, 방위비 분담금에 대한 국민의 관심도 높아지고 있다. 본 연구의 목적은 한미 방위비 분담금 결정에 영향을 미치는 결정 요인(경제, 안보, 국내정치, 행정, 국제정치)을 실증적으로 분석하여 방위비 분담금 결정 과정을 보다 깊이 있게 이해하고, 방위비 분담금 산정과 집행의 효율성을 제고하는 것이다. 연구 범위는 1991년 ~ 2021년의 한미 방위비 분담금이다. 실증분석에 이용된 자료는 국방부, 정부 통계자료, SIPRI, 언론보도 등 다양한 2차 자료를 활용했다. 실증분석 방법으로 시계열을 활용한 다중회귀분석을 이용하고 자기회귀모형으로 데이터를 분석하였다. 다중회귀분석을 통한 실증적 연구 결과 우리는 아래와 같은 결과를 도출했다. 한국의 경제 규모, 즉 GDP와 전년도의 방위비 분담금, 그리고 주한미군의 병력 수치가 방위비 분담금 결정에 정(+)의 영향을 미치는 것으로 분석되었다. 이는 한국의 경제 성장이 방위비 분담금 증가에 영향을 주는 주요 요인임을 나타내며, 예산의 점진적 증가와 주한미군 주둔 비용 분담 특별협정(SMA) 협상 방식이 중요한 역할을 한다는 것을 시사한다. 반면, 집권당의 정치적 성향, 북한의 군사 위협, 중국의 국방예산 등은 방위비 분담금 결정에 통계적으로 유의미한 영향을 미치지 않는 것으로 나타났다.

• 한국학교ㆍ지역보건교육학회지
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• 제25권2호
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• pp.15-26
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• 2024

목적: 본 연구의 목적은 청소년들의 전자담배 사용경험과 스트레스, 자살생각, 범불안장애와 같은 정신건강과의 관계를 알아보기 위함이다. 방법: 제19차(2023년) 청소년 건강행태조사를 바탕으로 교차분석과 복합설계 로지스틱 회귀분석을 통해 전자담배사용과 정신 건강과의 관계를 규명하였다. 결과: 남자청소년의 경우 전자담배 평생 사용경험(OR:1.218)과 현재 전자담배 사용경험(OR:1.266), 여자청소년의 경우 전자담배 평생 사용경험(OR:1.587)이 스트레스에 영향을 미치는 요인이었다. 남자청소년의 전자담배 평생 경험(OR:1.866)과 현재 사용(OR:1.651)이 자살생각에 영향을 미쳤으며, 여자청소년의 경우 전자담배 평생 경험(OR:2.375과 전자담배 현재 사용(OR:1.841)이 자살생각에 영향을 미치는 요인으로 나타났다. 또한 남자청소년의 전자담배 평생경험(OR:1.307)과 여자청소년의 전자담배 평생경험(OR:1.616)은 범불안장애에 영향을 미치는 요인으로 나타났다. 결론: 청소년의 전자담배 사용과 정신건강 사이에는 유의한 관계가 있기에 청소년기 초기에 전자담배사용 예방 교육이 필요하다.

• Journal of Microbiology and Biotechnology
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• 제34권5호
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• pp.1146-1153
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• 2024

The increasing economic losses associated with growth retardation caused by Enterocytozoon hepatopenaei (EHP), a microsporidian parasite infecting penaeid shrimp, require effective monitoring. The internal transcribed spacer (ITS)-1 region, the non-coding region of ribosomal clusters between 18S and 5.8S rRNA genes, is widely used in phylogenetic studies due to its high variability. In this study, the ITS-1 region sequence (~600-bp) of EHP was first identified, and primers for a polymerase chain reaction (PCR) assay targeting that sequence were designed. A newly developed nested-PCR method successfully detected the EHP in various shrimp (Penaeus vannamei and P. monodon) and related samples, including water and feces collected from Indonesia, Thailand, South Korea, India, and Malaysia. The primers did not cross-react with other hosts and pathogens, and this PCR assay is more sensitive than existing PCR detection methods targeting the small subunit ribosomal RNA (SSU rRNA) and spore wall protein (SWP) genes. Phylogenetic analysis based on the ITS-1 sequences indicated that the Indonesian strain was distinct (86.2% nucleotide sequence identity) from other strains collected from Thailand and South Korea, and also showed the internal diversity among Thailand (N = 7, divided into four branches) and South Korean (N = 5, divided into two branches) samples. The results revealed the ability of the ITS-1 region to determine the genetic diversity of EHP from different geographical origins.