• 한국동물생명공학회지
• /
• 제35권1호
• /
• pp.42-49
• /
• 2020

As a preclinical study, many researchers have been attempted to convert the porcine PSCs into several differentiated cells with transplantation of the differentiated cells into the pigs. Here, we attempted to derive neuronal progenitor cells from pig embryonic germ cells (EGCs). As a result, neuronal progenitor cells could be derived directly from pig embryonic germ cells through the serum-free floating culture of EB-like aggregates (SFEB) method. Treating retinoic acid was more efficient for inducing neuronal lineages from EGCs rather than inhibiting SMAD signaling. The differentiated cells expressed neuronal markers such as PAX6, NESTIN, and SOX1 as determined by qRT-PCR and immunostaining. These data indicated that pig EGCs could provide valid models for human therapy. Finally, it is suggested that developing transgenic pig for disease models as well as differentiation methods will provide basic preclinical data for human regenerative medicine and lead to the success of stem cell therapy.

• Journal of Preventive Medicine and Public Health
• /
• 제34권4호
• /
• pp.372-378
• /
• 2001

Objectives : This study introduced the healthy life-year(HeaLY), a composite indicator of disease burden, and used it to estimate the burden of major cancers in Korea. Methods : We collected data from the national death certificate database, the national health insurance claims database and the abridged life table. This data was used to create a spreadsheet and estimate the burden of major cancers by sex in terms of HeaLYs. Results : The burden of 10 major cancers for males was 2,248.97 person-year in terms of HeaLYs. Stomach cancer, liver cancer, and lung cancer were responsible for 75.2% of the burden of 10 major cancers. The disease burden of 10 major cancers for females was estimated to be 1,567.58 person-years. About two thirds of HeaLYs lost were from stomach cancer, liver cancer, lung cancer, colorectal cancer, and breast cancer. The rankings among 10 major cancers were somewhat different in terms of both HeaLYs and deaths as the HeaLY method considers both mortality and morbidity. Conclusions : Despite the limitations of the data sources, we conclude that HeaLY can aid in setting policy priorities concerning major cancers by estimating the disease burden of these cancers. Time-series analysis of the disease burden using HeaLY and DALY will elucidate the strengths and weaknesses of both methods.

• 융합정보논문지
• /
• 제9권6호
• /
• pp.183-193
• /
• 2019

본 연구는 치위생 전공 대학생의 직업 가치관과 전공만족도가 진로 결정 자기효능감에 미치는 영향을 규명하고자 B 지역 내 치위생 전공 대학생을 대상으로 설문 조사 후 SPSS 24.0 및 AMOS 24.0 프로그램을 통해 실증 분석하였다. 외재적 직업 가치관은 진로 결정 자기효능감에 직접적으로 정(+)의 효과와 매개변수인 전공만족도에 부(-)의 효과가, 내재적 직업가치관은 전공만족도에 직접적으로 정(+)의 효과가 있음이 검정되었다. 또한, 외재적 직업 가치관과 내재적 직업 가치관은 전공만족도를 매개로 진로 결정 자기효능감에 간접효과가 있었다. 이는 진로 결정 자기효능감 향상을 위하여 바람직한 직업 가치관 형성과 전공 만족 수준을 높여야 함을 시사하며, 치위생 전공 대학생의 진로 및 교육 방향 설정의 기초자료로 활용될 것으로 판단된다.

• 디지털융복합연구
• /
• 제19권2호
• /
• pp.531-538
• /
• 2021

이 연구는 무용전공 고등학생의 자기관리가 섭식태도와 섭식장애에 미치는 영향을 규명하는데 목적이 있다. 연구대상은 서울과 경기도, 충청도에 소재하고 있는 예술고등학교 무용전공 고등학생 239명으로, 조사도구는 설문지를 사용하였다. 자료 분석은 다중회귀분석과 위계적 회귀분석을 실시하여 다음과 같은 결과를 도출하였다. 첫째, 무용전공 고등학생의 대인관리는 절제된 섭식에 영향을 미치며, 몸 관리는 외부적 섭식과 정서적 섭식에 영향을 미친다. 둘째, 무용전공 고등학생의 자기관리는 거식증에 유의한 영향을 미친다. 셋째, 무용전공 고등학생의 섭식태도는 자기관리와 섭식장애를 강력하게 매개한다. 이상의 결과는 무용전공 고등학생들의 지나친 신체에 대한 관리는 섭식태도와 거식증에 높은 영향을 미친다는 것을 의미한다. 이에 따라 학생들의 올바른 섭식행동을 위한 지도자들의 세심한 지도가 필요한 것으로 사료된다.

• 한국치위생학회지
• /
• 제21권3호
• /
• pp.311-318
• /
• 2021

Objectives: The purpose of this study was to understand the level and patterns of college adjustment, major satisfaction, academic engagement, and attention deficit hyperactivity disorder (ADHD). This study examined the factors influencing adaptation to college life. Methods: This study was approved by the institutional review board of 00 university. We analyzed 166 survey data responses collected by distributing questionnaires from June 1 to July 2, 2020. Statistical product and service solutions version 23.0 was used for statistical analyses. The data were presented as frequencies and percentages or means and standard deviations, and pearson correlation analysis and multiple regression analysis were performed. Results: There was a significant difference in the average score of major satisfaction according to the type of college (university) and grades. For college adjustment, there was a significant difference in the average score according to major grades. Academic engagement showed a significant difference in the average score according to the college type and grade. Major satisfaction, college adjustment, and academic motivation showed significant positive correlations among the variables, whereas ADHD, major satisfaction, and college adjustment showed a significant negative correlation. Multiple regression analysis revealed that major satisfaction (p<0.001) and academic motivation (p<0.001) were factors affecting college adjustment (p<0.05). Conclusions: It is necessary to develop and apply specific and systematic adaptation programs to improve the understanding, control, and guidance methods for college students and to promote human relations, such as school life and social life.

• 문화기술의 융합
• /
• 제7권1호
• /
• pp.518-524
• /
• 2021

이 연구는 보건계열 대학생의 학업성취도, 전공선택동기, 직업가치관 및 대학생확적응과의 관계를 확인하고자 하였다. G도시에 소재한 일개 4년제 대학 보건계열 대학생 495명을 대상으로 구조화된 설문지를 이용하여 자료를 수집하였다. 연구결과 학업성취도는 전공선택동기(r=.446, p<.001)와 직업가치관(r=.255, p<.001), 대학생활적응(r=.391, p<.001)과 정적상관관계를 나타내었다. 전공선택동기는 직업가치관(r=.354, p<.001) 및 대학생활적응(r=.220, p<.001)과 정적상관관계를 나타내었다. 직업가치관은 대학생활적응(r=.193, p<.001)과 정적상관관계를 나타내었다. 자신의 적성에 맞는 진로선택을 위해 전공선택동기와 직업가치관을 강화하는 진로교육프로그램과 대학생활적응을 향상시키는 학생지도프로그램의 개발이 필요하다.

• 대한원격탐사학회지
• /
• 제37권1호
• /
• pp.153-160
• /
• 2021

Land Surface Temperature (LST) is the radiological surface temperature which observed by satellite. It is very important factor to estimate condition of the Earth such as Global warming and Heat island. For these reasons, many countries operate their own satellite to observe the Earth condition. South Korea has many landcovers such as forest, crop land, urban. Therefore, if we want to retrieve accurate LST, we would use high-resolution satellite data. In this study, we made LSTs with 4 LST retrieval algorithms which are used widely with Landsat-8 data which has 30 m spatial resolution. We retrieved LST using equations of Price, Becker et al. Prata, Coll et al. and they showed very similar spatial distribution. We validated 4 LSTs with Moderate resolution Imaging Spectroradiometer (MODIS) LST data to find the most suitable algorithm. As a result, every LST shows 2.160 ~ 3.387 K of RMSE. And LST by Prata algorithm show the lowest RMSE than others. With this validation result, we choose LST by Prata algorithm as the most suitable LST to South Korea.

• 문화기술의 융합
• /
• 제9권3호
• /
• pp.145-151
• /
• 2023

본 연구는 간호학과 신입생을 대상으로 간호학 전공에 대한 인식을 파악함으로써 간호학 전공 교육과정 개발 및 신입생 유치에 대한 입시전략의 기초자료를 제공하고자 시도되었다. 본 연구의 참여자는 2021년 1학기에 개설된 신입생 필수 교양인 자기 탐색을 이수한 간호학과 신입생 중 연구 참여에 동의한 40명을 대상으로 하였다. 자료수집은 15주 수업 후 참여자들이 작성한 학습일지였으며, 자료 분석은 Heieh와 Shannon이 제시한 전통적 내용분석 방법을 적용하였다. 연구 결과 '간호학 전공 입문 동기', '간호학 전공의 가치', '간호학 전공의 걸림돌'의 3개의 주제가 도출되었다. 따라서 대학 및 학과는 중·고등학교와 연계한 체험형 학과 견학프로그램을 개발 및 진행하는 입시전략을강화해야겠으며, 기초학습 능력이 부족한 학생들을 대상으로 한 교과 및 비교과 프로그램을 제공하여 전공과목 수강에 어려움을 해결해 줘야겠다.

• 한국환경과학회지
• /
• 제25권2호
• /
• pp.281-288
• /
• 2016

After analyzing of heating value of four kinds of RDF, the RDF-D has the highest heating value, was chosen to be mixed with carbonized sludge by different ratio. The 85%:15% ratio, which has the highest efficiency, was analyzed with thermogravimetric and pyrolysis kinetics. Applying of Kissinger method, activation energy was obtained from slope which is calculated from relation of ln(${\beta}/T^2{_m}$) and $1/T_m$. The kinetic parameters obtained from Kissinger method were 46.06 kJ/mol of RDF, 55.99 kJ/mol of carbonized sludge and 40.68 kJ/mol of mixture of RDF and carbonized sludge. The mixture of RDF and carbonized sludge has the lowest activation energy and frequency factor, during thermal decomposition reaction it has the slowest reaction rate and needs the lowest energy. Although activation energy with pyrolysis of RDF was irregularly scattered, it showed that activation energy was stabilized by co-pyrolysis of RDF and additives(Carbonized Sludge).

• Journal of Communications and Networks
• /
• 제2권1호
• /
• pp.5-17
• /
• 2000

cdma2000 offers several enhancement as compared to TIA/EIA-95, although it remains fully compatible with TIA/EIA-95 systems and allows for a smooth migration from one to the other-Major new capability include:1)connectivity to GSM-MAP in addition to IP and IS-41 networks; 2) new layering with new LAC and MAC architectures for improved service multiplexing and QoS management and efficient use of radio resource ;3) new bands and band widths of operation in support of various operator need and constraints, as well as desire for a smooth and progressive migration to cdma 2000; and 4) flexible channel structure in support of multiple services with various QoS and variable transmission rates at up to 1 Mbps per channel and 2 Mbps per user. Given the phenomenal success of wireless services and desire for higher rate wireless services. improved spectrum efficiency was a major design goal in the elaboration of cdma2000. Major capacity enhancing features include; 1) turbo coding for data transmission: 2)fast forward link power control :3) forward link transmit diversity; 4) support of directive antenna transmission techniques; 5) coherent reverse link structure; and 6) enhanced access channel operation. As users increasingly rely on their cell phone at work and at home for voice and data exchange, the stand-by time and operation-time are essential parameters that can influence customer's satisfaction and service utilization. Another major goal of cdma2000 was therefore to enable manufacturers to further optimize power utilization in the terminal. Major battery life enhancing features include; 1) improved reverse link performance (i.e., reduced transmit power per information bit; 2) new common channel structure and operation ;3) quick paging channel operation; 4) reverse link gated transmission ; and 5) new MAC stated for efficient and ubiquitous idle time idle time operation. this article provides additional details on those enhancements. The intent is not to duplicate the detailed cdma2000 radio access network specification, but rather to provide some background on the new features of cdma2000 and on the qualitative improvements as compared to the TIA/EIA-95 based systems. The article is focused on the physical layer structure and associated procedures. It therefore does not cover the MAC, LAC, radio resource management [1], or any other signaling protocols in any detail. We assume some familiarity with the basic CDMA concepts used in TIA/EIA-95.