• 한국항해항만학회지
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• 제33권8호
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• pp.563-572
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• 2009

철강산업은 우리나라의 대표적인 국가 전략산업으로 정부의 적극적 정책지원과 민간의 경영노력이 조화를 이루어 1970년대 이후 한 국경제성장의 견인차 역할을 해왔다. 그러나 우리나라의 경우 철강산업 원자재의 대부분을 수입에 의존하고 있는 실정이며, 이때 수입되는 원자재의 중량이 무겁기 때문에 철강산업은 수송업이라 할 만큼 수송비 부담이 큰 산업이다. 수송의 합리화는 철강산업의 주요한 과제라 할 수 있다. 따라서 본 연구에서는 철스크랩의 안정적인 공급확보 차원에서 철스크랩 수출입 관련 해상운송의 운송경로별(컨테이너선 vs 벌크선) 경제성을 분석하였다. 이를 위해서 먼저 국내외 철강산업의 현황에 대해서 살펴보았으며, 연간 세계 조강생산규모와 철스크랩 소비규모, 세계 철스크랩 교역구조를 분석하였다. 또한, 철스크랩 수출입 관련 컨테이너선과 벌크선의 두 운송수단 간의 수송물류비를 비교하기 위해서 "D 사(社)"의 철스크랩 수출입 운송시간과 운송비용 항목을 이용하여 톤당 물리비용을 산정하여 비교하였다.

• 폴리머
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• 제33권2호
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• pp.118-123
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• 2009

본 연구는 신경손상 모델에서 신경재생을 유도하는 슈반세포(SC)의 배양에 케라틴이 미치는 영향을 확인하기 위한 실험으로써, 친수성 아미노산으로 구성된 케라틴과 PLGA를 혼합하여 케라틴/PLGA 필름을 0, 10, 20, 그리고 50 wt%가 되도록 제조하여, 케라틴 안에 존재하는 다양한 단백질 및 신호전달물질이 슈반세포의 증식, 부착형태 그리고 표현형 유지에 미치는 영향을 확인하였다. 세포의 배양 방법은 손쉽고 순수한 세포 분리가 가능한 Morrissey의 방법을 이용하였고 필름의 젖음성 확인을 위하여 접촉각 측정을 실시하였으며, 정해진 시간에 세포를 계수하여 케라틴 함량에 따른 세포 성장차이를 비교하였다. 케라틴/PLGA 필름에서의 세포의 부착 거동 및 세포 형태를 SEM을 통하여 확인하였고 슈반세포의 표현형 유지를 확인하기 위해 RT-PCR을 수행하였다. 실험 결과, 다른 함유량과 비교 시 케라틴 10 또는 20 wt%가 함유된 케라틴/PLGA 필름이 SC 성장 및 표현형 유지에 긍정적인 영향을 미침을 확인하였다.

• Parasites, Hosts and Diseases
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• 제53권5호
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• pp.553-559
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• 2015

Research on micro-level assessment of the changes of socio-economic status following health interventions is very scarce. The use of household asset data to determine wealth indices is a common procedure for estimating socio-economic position in resource poor settings. In such settings information about income is usually lacking, and the collection of individual consumption or expenditure data would require in-depth interviews, posing a considerable risk of bias. In this study, we determined the socio-economic status of 213 households in a community population in an island in the north-western Tanzania before and 3 year after implementation of a participatory hygiene and sanitation transformation (PHAST) intervention to control schistosomiasis and intestinal worm infections. We constructed a household 'wealth index' based housing construction features (e.g., type of roof, walls, and floor) and durable assets ownership (e.g., bicycle, radio, etc.). We employed principal components analysis and classified households into wealth quintiles. The study revealed that asset variables with positive factor scores were associated with higher socio-economic status, whereas asset variables with negative factor scores were associated with lower socio-economic status. Overall, households which were rated as the poorest and very poor were on the decrease, whereas those rated as poor, less poor, and the least poor were on the increase after PHAST intervention. This decrease/increase was significant. The median shifted from -0.4376677 to 0.5001073, and the mean from -0.2605787 (SD; 2.005688) to 0.2605787 (SD; 1.831199). The difference in socio-economic status of the people between the 2 phases was highly statistically significant (P<0.001). We argue that finding of this study should be treated with caution as there were other interventions to control schistosomiasis and intestinal worm infections which were running concurrently on Kome Island apart from PHAST intervention.

• 한국정보컨버전스학회:학술대회논문집
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• 한국정보컨버전스학회 2008년도 International conference on information convergence
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• pp.63-70
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• 2008

The authors, Tom Karygiannis of NIST, and Bernard Eydt, Greg Barber, Lynn Bunn, and Ted Phillips of Booz Allen Hamilton, wish to thank Steven Fick, Rick Korchak, Kate Remley, Jeff Guerrieri, Dylan Williams, Karen Scarfone, and Tim Grance of NIST, and Kenneth Waldrop and Beth Mallory of Booz Allen Hamilton. These individuals reviewed drafts of this document and contributed to its technical content. The authors would also like to express their thanks to several experts for their critical review and feedback on drafts of the publication. These experts include V.C. Kumar of Texas Instruments; Simson Garfinkel of the Naval Postgraduate School; Peter Sand of the Department of Homeland Security; Erika McCallister of MITRE; and several professionals supporting Automatic Identification Technology(AIT) program offices within the Department of Defense(DoD), especially Nicholas Tsougas, Fred Naigle, Vince Pontani, Jere Engelman, and Kathleen Smith. During the public comment period we received helpful comments from the following Federal Government agencies: the US Departments of Defense, Health and Human Services, Homeland Security, Labor, and State; the Office of the Director of National Intelligence; the Office of Management and Budget; and the General Services Administration. We also received several helpful contributions from commercial industry, including comments from EPCglobal, VeriSign, and Priway. Finally, the authors wish to thank the following individuals for their comments and assistance: Brian Tiplady, Daniel Bailey, Paul Dodd, Craig K. Harmon, William MacGregor, Ted Winograd, Russell Lange, Perry F. Wilson, John Pescatore, Ronald Dugger, Stephan Engberg, Morten Borup Harning, Matt Sexton, Brian Cute, Asterios Tsibertzopoulos, Mike Francis, Joshua Slob in, Jack Harris, and Judith Myerson.

• Parasites, Hosts and Diseases
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• 제53권5호
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• pp.535-543
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• 2015

Integrated control strategies are important for sustainable control of schistosomiasis and soil-transmitted helminthiasis, despite their challenges for their effective implementation. With the support of Good Neighbors International in collaboration with National Institute of Medical Research, Mwanza, Tanzania, integrated control applying mass drug administration (MDA), health education using PHAST, and improved safe water supply has been implemented on Kome Island over 5 years for controlling schistosomiasis and soil-transmitted helminths (STHs). Baseline surveys for schistosomiasis and STHs was conducted before implementation of any integrated control strategies, followed by 4 cross-sectional follow-up surveys on randomly selected samples of schoolchildren and adults in 10 primary schools and 8 villages, respectively, on Kome islands. Those follow-up surveys were conducted for impact evaluation after introduction of control strategies interventions in the study area. Five rounds of MDA have been implemented from 2009 along with PHAST and improved water supply with pumped wells as other control strategies for complementing MDA. A remarkable steady decline of schistosomiasis and STHs was observed from 2009 to 2012 with significant trends in their prevalence decline, and thereafter infection rate has remained at a low sustainable control. By the third follow-up survey in 2012, Schistosoma mansoni infection prevalence was reduced by 90.5% and hookworm by 93.3% among schoolchildren while in adults the corresponding reduction was 83.2% and 56.9%, respectively. Integrated control strategies have successfully reduced S. mansoni and STH infection status to a lower level. This study further suggests that monitoring and evaluation is a crucial component of any large-scale STH and schistosomiasis intervention.

• Parasites, Hosts and Diseases
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• 제53권5호
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• pp.515-524
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• 2015

The objectives of this study was to conduct a survey on schistosomiasis and soil-transmitted helminth (STH) infections in order to come up with feasible control strategies in Lake Victoria basin, Tanzania. Depending on the size of the school, 150-200 schoolchildren were recruited for the study. Duplicate Kato-Katz stool smears were prepared from each child and microscopically examined for Schistosoma mansoni and STHs. Urine specimens were examined for Schistosoma haematobium eggs using the filtration technique. After the survey, mass drug administration was done using praziquantel and albendazole for schistosomiasis and STHs infections, respectively. A total of 5,952 schoolchildren from 36 schools were recruited for the study and had their stool and urine specimens examined. Out of 5,952 schoolchildren, 898 (15.1%) were positive for S. mansoni, 754 (12.6%) for hookworms, 188 (3.2%) for Ascaris lumblicoides, and 5 (0.008%) for Trichuris trichiura. Out of 5,826 schoolchildren who provided urine samples, 519 (8.9%) were positive for S. haematobium eggs. The results revealed that intestinal schistosomiasis, urogenital schistosomiasis, and STH infections are highly prevalent throughought the lake basin. The high prevalence of intestinal and urogenital schistosomisiasis in the study area was a function of the distance from Lake Victoria, the former being more prevalent at localities close to the lake, whilst the latter is more so away from it. Control of schistosomiasis and STHs in the study area requires an integrated strategy that involves provision of health education to communities, regular treatments, and provision of adequate safe water supply and sanitation facilities.

• Nutrition Research and Practice
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• 제18권1호
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• pp.149-164
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• 2024

BACKGROUND/OBJECTIVES: The economic recession caused by the coronavirus disease 2019 pandemic disproportionately affected poor and vulnerable populations globally. Better uunderstanding of vulnerability to shocks in food supply and demand in the Asia Pacific region is needed. SUBJECTS/METHODS: Using secondary data from rapid assessment surveys during the pandemic response (n = 10,420 in mid-2020; n = 6,004 in mid-2021) in India, Indonesia, Myanmar, and Vietnam, this study examined the risk factors for reported income reduction or job loss in mid-2021 and the temporal trend in food security status (household food availability, and market availability and affordability of essential items) from mid-2020 to mid-2021. RESULTS: The proportion of job loss/reduced household income was highest in India (60.4%) and lowest in Indonesia (39.0%). Urban residence (odds ratio [OR] range, 2.20-4.11; countries with significant results only), female respondents (OR range, 1.40-1.69), engagement in daily waged labor (OR range, 1.54-1.68), and running a small trade/business (OR range, 1.66-2.71) were significantly associated with income reduction or job loss in three out of 4 countries (all P < 0.05). Food stock availability increased significantly in 2021 compared to 2020 in all four countries (OR range, 1.91-4.45) (all P < 0.05). Availability of all essential items at markets increased in India (OR range, 1.45-3.99) but decreased for basic foods, hygiene items, and medicine in Vietnam (OR range, 0.81-0.86) in 2021 compared to 2020 (all P < 0.05). In 2021, the affordability of all essential items significantly improved in India (OR range, 1.18-3.49) while the affordability of rent, health care, and loans deteriorated in Indonesia (OR range, 0.23-0.71) when compared to 2020 (all P < 0.05). CONCLUSIONS: Long-term social protection programs need to be carefully designed and implemented to address food insecurity among vulnerable groups, considering each country's market conditions, consumer food purchasing behaviors, and financial support capacity.

• 천문학회지
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• 제56권2호
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• pp.263-275
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• 2023

The Sun-Earth Lagrange point L4 is considered as one of the unique places where the solar activity and heliospheric environment can be observed in a continuous and comprehensive manner. The L4 mission affords a clear and wide-angle view of the Sun-Earth line for the study of the Sun-Earth and Sun-Moon connections from he perspective of remote-sensing observations. In-situ measurements of the solar radiation, solar wind, and heliospheric magnetic field are critical components necessary for monitoring and forecasting the radiation environment as it relates to the issue of safe human exploration of the Moon and Mars. A dust detector on the ram side of the spacecraft allows for an unprecedented detection of local dust and its interactions with the heliosphere. The purpose of the present paper is to emphasize the importance of L4 observations as well as to outline a strategy for the planned L4 mission with remote and in-situ payloads onboard a Korean spacecraft. It is expected that the Korean L4 mission can significantly contribute to improving the space weather forecasting capability by enhancing the understanding of heliosphere through comprehensive and coordinated observations of the heliosphere at multi-points with other existing or planned L1 and L5 missions.

• 해양환경안전학회지
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• 제25권1호
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• pp.102-110
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• 2019

우리나라의 조선해양플랜트 산업은 2011~2015년 기간에 우리나라 품목별 수출기여도에서 1~4위를 차지할 정도로 대한민국 경제성장을 견인하는 중요한 산업이다. 이 연구는 과거 건조에만 치중했던 우리나라 해양플랜트 시추설비의 산업구조에서 통합시운전의 서비스 공급이 가능한 비즈니스 모델을 검토함으로써 시추설비 시장에서 우리나라 조선소의 국가경쟁력을 향상시킬 수 있는 방안을 제안하고자 하였다. 2014년에 시도된 주작-1 폐공을 활용한 시운전 서비스 모델과 이의 한계 사항을 극복하고 사업을 활성화하기 위한 새로운 제안 비즈니스모델인 수심 150미터급 시운전 전용 모델의 경제성을 검토하였다. 경제성 평가 결과, 수심 150미터급 모델이 경제적으로 더 효과적인 것으로 나타났다. 그리고 통합시추설비의 시운전이 연간 2회에서 3,4,5회로 늘어남에 따라 NPV와 IRR 및 B/C 비율이 모두 증가하였으며, 1회당 사용료는 감소하는 것으로 나타났다. 따라서 해양시추설비의 통합시운전 사업은 우리나라에서 건조되어 인도되는 설비를 대상으로 시추 시운전을 적극적으로 유치하는 노력이 필요하다.

• 한국항해항만학회지
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• 제27권1호
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• pp.9-18
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• 2003

이 연구는 산업현장에서 직접 수집한 자료를 근거로 수행된 한국 선박관리업의 국제경쟁력 실태에 대한 분석이다. 본 연구에서는 국내 선박관리회사를 국제시장에 존재하는 다국적 선박관리회사와 비교하는 것이 보다 목적에 부합할 것이다. 그러나 국내 선박관리회사는 전반적으로 국제경쟁력 수준이 너무 낮아 다국적 선박관리회사와 비교하기에는 부적절하였다. 때문에 본 연구에서는 국적 외항선사의 선박관리부문을 국내 선박관리업의 비교주체이자 표본으로 선정, 비교하였다. 경쟁력분석은 크게 가격 경쟁력과 비가격 경쟁력으로 구분하여 실시하였다. 각격 경쟁력 요소로는 선원비, 입거수리비, 운항수리비, 선용품비, 기부속비, 윤활유비 및 관리수수료를 포함하였으며, 비가격 경쟁력 요소로는 선원 및 육상관리인의 자질, 관리조직의 효율성, 관리체계의 역량, 산업규격인증, 선박관리 노하우, 대선박 관리지원체계, 사무. 선박자동화 등으로 구성되었다. 분석결과 국적선사 선박관부문은 외국의 전문 선박관리회사들에 비해 전박적으로 국제경쟁력을 확보한 것으로 나타났다. 따라서 한국의 선박관리 사업은 선박관리 경쟁력 수준을 지속적으로 재고하여 적극적으로 국제시장 진출은 시도할 필요성이 있다.