• Mycobiology
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• 제46권3호
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• pp.269-277
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• 2018

The production of water-soluble pigments by fungal strains indigenous to South Korea was investigated to find those that are highly productive in submerged culture. Among 113 candidates, 34 strains that colored the inoculated potato dextrose agar medium were selected. They were cultured in potato dextrose broth and extracted with ethanol. The productivity, functionality (radical-scavenging activities), and color information (CIELAB values) of the pigment extracts were measured. Five species produced intense yellowish pigments, and two produced intense reddish pigments that ranked the highest in terms of absorbance units produced per day. The pigment extracts of Penicillium miczynskii, Sanghuangporus baumii, Trichoderma sp. 1, and Trichoderma afroharzianum exhibited high radical-scavenging activity. However, the S. baumii extract showed moderate toxicity in the acute toxicity test, which limits the industrial application of this pigment. In conclusion, P. miczynskii KUC1721, Trichoderma sp. 1 KUC1716, and T. afroharzianum KUC21213 were the best fungal candidates to be industrial producers of safe, functional water-soluble pigments.

• 한국기계가공학회지
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• 제12권3호
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• pp.7-12
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• 2013

In Die casting process, the problem of die degradation is often issued. In oder to increase of die life the material degradation of die steel was investigated using test core pins. Three test core pins were positioned in front of the gate entry and observed washout and soldering resistance during Mg die casting process. The test parameters are set as different commercial die materials, coatings condition and hardness of die surface. Usign 220t magnesium die casting machine was employed to cast AZ91 magnesium alloys. After 150 shots, macroscopic observation of die surface was carried out. Additional 50 cycles later, test pins were chemically cleaned with 5% HCl aqueous solution to find out the existence of washout and soldering layers. Microstructural characterization of die surface and the die roughness measurement were performed together. Computational simulation using AnyCasting program was also beneficial to correlate the extent of die damage with the position of test pin inside die cavity. As results, the optimal combination of die steel with productive coating as well as its hardness was drawn out. it will be helpful to decide the material and condition considering increasing of tool life.

• The Journal of Asian Finance, Economics and Business
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• 제6권1호
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• pp.241-248
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• 2019

The purpose of this study is to investigate empirical evidences of productivity of life insurance institutions in Malaysia. Therefore, this study attempts to explore the productivity of the life insurance institutions in Malaysia. The overall findings show that the total factor productivity (TFP) has progressed by 2.5% per year during the study period from 2012 to 2016 in the Malaysian insurance industry. However, TFP change has declined from 2012 to 2015 and observed a negative growth in 2015-16 (3.3%). The highest productivity progress was documented during 2012-13 at a rate of 11.7% while the minimum productivity progress was during 2014-15 (only 0.2%). The results also indicate that the decomposition of TFP found that overall progress could mainly be attributed to technological change (TC). However, technical efficiency change (TEC) and pure technical efficiency change (PTE) have negative impact on TFP. The findings also show that most of the insurance companies have a steady growth. Therefore, this study will contribute new insights for the policy makers and insurance institutions to take appropriate steps in developing relevant policies for increasing productivity of insurance institutions in Malaysia.

• 의학교육논단
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• 제24권2호
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• pp.113-127
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• 2022

Considering the recent medicalization of death, the importance of preparing both laypersons and medical students to have meaningful end-of-life conversations, which is among the objectives of death education, will grow. The Act of Hospice and Palliative Care and Decisions on Life-Sustaining Treatment for Patients at the End of Life provided a new source of momentum to death education for both laypersons and medical professionals, as the importance of education on death is widely recognized. However, problems remain regarding how to prepare people for productive conversations at the end-of-life and how to secure the continuity of care. Different focuses and deficiencies are observed in death education programs for each category of learner. In education for laypeople, tangible information on how to actualize one's existential and personal understanding of death through real-life options is lacking, except for presenting the "protocol" of the Act. Conversely, basic medical education lacks an understanding of or confrontation with death on the existential and personal levels. Death education should aim to build a shared understanding that can facilitate communication between the two groups. The scant overlap between layperson education and basic medical education even after the Act's enactment is worrisome. Further fundamental changes in death education are required regarding its content. Topics that patients and doctors can share and discuss regarding death and end-of-life care should be discovered and provided as educational content both to laypeople and future medical professionals.

• 한국동물번식학회:학술대회논문집
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• 한국동물번식학회 2003년도 학술발표대회 발표논문초록집
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• pp.33-33
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• 2003

This study was conduct to compare the efficacy to produce male and female somatic cloned piglets. Maturation of porcine COCs was accomplished by incubation in NCSU-23 medium supplemented with 0.6 mM cysteine, 10% porcine follicular fluid, 1mM dibutyryl cyclic adenosine monophosphate (dbc-AMP, Sigma, USA), and 0.1 IU/ml human menopausal gonadotrophin (hMG, Teikokuzoki, Japan) for 20h and then cultured without dbcAMP and hMG for another 18 to 24 h. Female and male fetal cells were isolated from each fetus, cultured in ES-DMEM medium containing 10% FCS. Enucleated oocytes were fused with fetal fibroblasts (passage 4 to 15). Reconstructed embryos were cultured in NCSU-23 with 4 mg/ml BSA under mineral oil at 39$^{\circ}C$ in 5% $CO_2$ in air. A total of 12,328 nuclear-transferred embryos (1- to 4-cell stage) were surgically transferred into 69 surrogate gilts. Three recipients aborted during the period of conception. Three gilts delivered eleven female piglets, and five recipients gave rise to birth 22 male piglets. The average birth weigh of the cloned piglets was 1.52 kg (1.38~1.83 kg) in female piglets and 0.84 kg (0.45~1.25 kg) in male piglets. Alive cloned pigs was seven in female piglets (63.6%) and four in male piglets (18.2%). The other two recipients is ongoing. This study suggests that female-derived fetal cell as a nuclear donor has more capability on production of cloned piglets than male.

• 농업과학연구
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• 제49권2호
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• pp.357-366
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• 2022

Biochar can be obtained by using various types of biomass under an oxygen-limited condition. Biochar can be utilized for various applications such as soil improvement, waste management, growth promotion, and adsorption. Wood vinegar is produced by the process of pyrolysis wood biomass and is used as a growth promoter, for soil improvement, and as a feed additive. When wood vinegar is treated on soil, it acts to control soil pH, improve nutrient availability, and alleviate N₂O and NH₃ volatilization. The objective of this study was to evaluate the effect of biochar and wood vinegar on the growth of perilla and soil quality. The experiment was conducted by using a Wagner pot (1·5,000 a^-1) in a glass greenhouse. The biochar was produced by pyrolysis at 450℃ for 30 minutes using rice husk and rice straw. Wood vinegar was diluted to 1 : 500 (v·v^-1) and used in this experiement. In the results of a cultivation experiment, co-application of biochar and wood vinegar enhanced the growth of perilla. In particular, rice husk biochar affected the leaves of the perilla, and rice straw biochar influenced the stems of the perilla. In addition, soil quality after treatment with biochar and wood vinegar applied together was highest compared to other units. Therefore, it is anticipated that co-application of biochar and wood vinegar will be more productive and improve soil quality compared to individual utilization of biochar and wood vinegar.

• 한국노년학
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• 제29권3호
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• pp.953-970
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• 2009

독립적이고 생산적인 노년기를 조망하는 성공적 노화라는 패러다임은 활기찬 인간관계 및 생산적 활동을 통한 적극적인 사회참여를 요구한다. 그러나 국내의 성공적 노화 연구에서는 배우자와 자녀관계를 넘어선 사회관계 및 사회활동에 관한 논의가 부족한 편이다. 본 연구는 성공적 노화와 관련하여 노인들이 다양한 사회활동들을 어떻게 인식하고 있는가를 설명하고자 한다. 즉 성공적 노화에 있어서 사회활동은 얼마나 중요하게 인식되는가, 여러 활동에 대한 인식의 공통성은 어떻게 유형화할 수 있는가, 이러한 인식은 연령층에 따라 다르게 나타나는가, 사회활동의 유형 인식에 영향을 미치는 개인의 특성과 환경적 조건은 무엇인가를 설명한다. 이를 위한 연구방법으로, 2008년 7월 10일~8월 23일에 구조화된 설문지를 이용하여 대면적 면접조사로 수집된 전국만 20세 이상 성인 1,000명 중에서 50세 이상 613명의 응답 자료를 분석하였다. 응답자들은 예비 노인, 전기 노인, 후기 노인으로 세분되어 사회활동과 관련된 인식을 비교하였다. 분석결과, 노인들은 기본적으로 성공적 노화를 위해서 사회활동에 참여해야 한다고 보지만, 개별 활동들의 중요성에 대한 인식은 차이를 보인다. 연령층별로 비교해 보면 특정한 활동을 강조하기보다 생애주기에 따라서 개인의 욕구와 동기에 따라 활동의 중요성이 바뀐다. 또한 여러 사회활동들에 대한 인식은 크게 생산적 활동과 관계적 활동의 범주로 분류되며, 연령층에 따라서 생산적 활동 또는 관계적 활동으로 인식되는 활동의 내용들이 다르게 연관되어 있다. 생산적 또는 관계적 활동의 선호는 성별, 거주지, 배우자유무, 자녀와 동거여부에 따라 다르며, 연령, 학력수준, 건강, 경제력은 유의하지 않은 반면 노후계획과 노동을 중시하는 태도는 일관되게 중요한 영향을 미치는 것으로 분석되었다. 이러한 특성은 사회활동 관련 정책 및 프로그램 체계에 반영되어야 할 것이며, 생산성을 중시하는 사회 활동의 강조는 정작 관계적 동기를 지향하는 노인층의 욕구와 괴리될 수 있다.

• 한국융합학회논문지
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• 제8권10호
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• pp.305-310
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• 2017

본 연구는 노인의 주관적 건강, 근로능력, 경제활동 참여, 삶의 만족 간 구조적 관계를 분석하는 데 목적이 있다. 최근 각 사회에서는 생산적 노화, 적극적 노년 등의 관점을 통해 노인에 대한 사회적 부담을 경감시키고 부정적 인식을 완화시키기 위해 노력해 왔으며, 특히 삶의 질을 향상시키기 위한 건강과 참여에 주목하고 있다. 본 연구의 분석 대상은 한국복지패널 10차 데이터(2015년)에서 65세 이상인 노인 3,392명을 대상으로 하였다. 분석 결과, 노인의 건강과 근로능력, 경제활동 참여는 삶의 만족에 직접적인 영향을 미치는 것으로 나타났다. 둘째, 노인의 건강은 근로능력과 경제활동 참여에 유의한 영향을 미쳤다. 셋째, 근로능력은 경제활동 참여에 정적으로 유의한 영향을 미쳤다. 분석결과를 바탕으로, 노인의 삶의 만족을 향상시키기 위한 주요 요인으로써 건강과 근로 관련 요인들에 대해 중요하게 고려할 것을 제언하였다.

• 가정과삶의질연구
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• 제27권4호
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• pp.1-18
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• 2009

This study has been performed to explore process of forming low cost small site housing communities and residential lives of the young elderly around small cities along rural counties of America and Canada, and suggest future implications for Korea. In this study, five low cost small housing zones such as cottage and mobile home parks in non-metropolitan counties of California and Ontario State such as Weed, Paradise, Sun City,, Wellington on the Lake, and Trenton were visited and the elderly residents and service experts were interviewed. The senior concentrating housing clusters were formed primarily from influx of both metropolitan and rural residents for the purpose of seeking warmful localities, traffic connections, and business purposes in theme focused production areas. On the other hand, residential lives in the zones are occasionally negatively influenced by unbalanced concentrations of elderly facilities such as nursing stations and funeral homes. For the future of Korean rural elderly policies, suggestions are made as follows: first, integrated forms of urban and rural township need to be settled as attracting places for early retiring people who seek low cost pastoral oriented but culturally activated environment. Second, a model town of mobile housing structures needs to be initiated as a measure of evaluating adaptation process of those movers. Third, a cooperation system among governmental ministries needs to be formed in order to integrate a long term master plan of establishing traditional rural town of independent housing districts. fourth, productive and active lifestyles need to be maintained for government lead retirement rural villages by limiting expansion of nursing related facilities around the independent areas. Fifth, visiting welfare service programs and volunteer groups need to be further developed for the housing area especially in winter time, when social integration and emotional comforts are extremely limited.

• International Journal of Knowledge Content Development & Technology
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• 제11권4호
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• pp.101-111
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• 2021

The world is going through the most unprecedented time with the outbreak of novel Coronavirus disease (COVID-19), which has become a threat to millions. A Coronavirus is a group of viruses that cause a variety of diseases in mammals and birds leading to a range of illnesses in humans including common cold and more severe forms like severe acute respiratory syndrome Coronavirus (SARS-CoV), Middle East respiratory syndrome Coronavirus (MERS-CoV) and COVID-19, which are life-threatening. The virus gets its name from its shape which takes the form of a crown with protrusions around it. In December 2019, a pneumonia outbreak was reported in the Wuhan City of China, which was later traced to a novel strain of Coronavirus and termed as Novel COVID-19. It typically causes flu-like symptoms including fever, cough and shortness of breath and is transmitted through human-to-human and there is no cure for it till now. Thus, this bibliometric study has been carried out to analyze the research progress in Coronavirus and literature published during a period of 30 years (1989-2019). Data for the study were fetched from Web of Science(WoS) multidisciplinary database and the publication trends in terms of total articles, productive countries, institutions, journals, productive authors, most cited articles and authors, etc have been analyzed. In total, 4917 articles were retrieved; these were from 711 sources and were contributed by 14442 authors. The collaboration index was 3.11, which clearly indicates that there has been a lot of collaboration in this field. The most preferred journal for the study period was "Journal of Virology" and the maximum contribution has been from the University of Hong Kong.