Design of Testbed for Agile Computing of MapReduce Applications by using Docker

Yunhee Kang 한국콘텐츠학회 2016 International Journal of Contents Vol.12 No.3

Category Factor Based Feature Selection for Document Classification

YunHee Kang 한국콘텐츠학회 2005 International Journal of Contents Vol.1 No.2

According to the fast growth of information on the Internet, it is becoming increasingly difficult to find and organize useful information. To reduce information overload, it needs to exploit automatic text classification for handling enormous documents. Support Vector Machine (SVM) is a model that is calculated as a weighted sum of kernel function outputs. This paper describes a document classifier for web documents in the fields of Information Technology and uses SVM to learn a model, which is constructed from the training sets and its representative terms. The basic idea is to exploit the representative terms meaning distribution in coherent thematic texts of each category by simple statistics methods. Vector-space model is applied to represent documents in the categories by using feature selection scheme based on TFiDF. We apply a category factor which represents effects in category of any term to the feature selection. Experiments show the results of categorization and the correlation of vector length.

A Process Status Aggregating service With Failure Detector

Yunhee Kang 한국정보기술학회 2005 한국정보기술학회논문지 Vol.3 No.5

This paper presents an extension of Open Grid Service Architecture(OGSA) aggregator service for providing the service-continuity of unreliable distributed computing environments. Generally distributed systems including grid computing system are notoriously subject to complex faults. Hence it is required to provide an aggregator architecture which has a failure detection feature. We implement an OGSA based extension service for managing information about computing resources such as CPU, memory, system load and processes by using stateful grid services and notification mechanism. The extended aggregating service system named Hydra, is based on a fault detection system of which that is used for monitoring information about processes which are running on UNIX/Linux machines. The main contribution of this paper is to enhance an aggregation service whereas it is loosely coupled to collect asynchronously between observer and a subscriber of Service Data Element(SDE) and its notifier.

Development of a Selective Medium for the Fungal Pathogen Cylindrocarpon destructans Using Radicicol

Kang, Yunhee,Lee, Seung-Ho,Lee, Jungkwan The Korean Society of Plant Pathology 2014 Plant Pathology Journal Vol.30 No.4

The soil-borne ascomycete fungus Cylindrocarpon destructans causes ginseng root rot disease and produces various secondary metabolites such as brefeldin A and radicicol. The slow growth of this fungus compared with other plant pathogenic and saprophytic fungi in soil disturbs isolation of this fungus from soil and infected ginseng. In this study, we developed a selective medium for C. destructans using radicicol produced by this fungus. Supplementing 50 mg/L of radicicol to medium inhibited the mycelia growth of other fungi including Botrytis cinerea, Rhizoctonia solani and Alternaria panax, but did not affect the growth of C. destructans. In addition, conidia germination of other fungal species except for C. destructans was inhibited in submerged culture supplemented with radicicol. This medium provides a very efficient tool for isolating C. destructans and also can be used as an enrichment medium for this fungus.

An Empirical Study for Handling Scientific Datasets

Yunhee Kang,Heeyoul Choi 보안공학연구지원센터(IJGDC) 2012 International Journal of Grid and Distributed Comp Vol.5 No.3

Poverty, Food Insecurity and Helplessness among the Poor in Bangladesh during the COVID-19 Pandemic - A Qualitative Study -

Yunhee Kang,Seungheon Han 위기관리 이론과 실천 2022 Crisisonomy Vol.18 No.10

본 연구는 코로나19 팬데믹으로 인해 빈곤층에서 증가한 경제적 위기와 영양적 위험, 그 대응전략을 탐색하기 위하여, 방글라데시 랑푸르도 카하롤군 5세 미만 자녀를 둔 여성 45명을 대상으로 심층면 접조사를 실시하였다. 대부분의 응답자는 코로나19 대유행 이후 실직 및 소득 감소를 경험하였고, 주식 및 영양가 있는 식품을 구매할 수 없었으며, 특히, 아동과 임산부는 영양적으로 부족하고 불균 형한 음식을 섭취하고 있었다. 이러한 위기에 대응하기 위해 각 가구들은 가축을 팔거나, 대출을 받고, 저축을 사용하는 등 다양한 임시방편적인 전략을 취했다. 특히, 대출을 받은 경우 대출금을 상환할 수 없어 다시금 심각한 경제적⋅정신적 스트레스의 악순환에 빠졌다. 응답자들은 이러한 위기를 미래에도 극복할 수 없을 것이라는 만연한 무력감과 좌절감을 표현했다. 조사 당시 지역정부 와 NGO의 지원이 부족했고, 지역사회 주민들 간 상호 부조 역시 경제적 어려움으로 인해 거의 발견 되지 않았다. 본 연구는 지속 가능한 대응전략으로서 자급자족을 촉진하는 소득증대 지원 등의 확대 와 지역사회 회복력 강화를 위한 후속 연구를 제안하였다. Globally, the COVID-19 pandemic heightened the risk of economic and nutritional instability, particularly among the poor population. We conducted in-depth interviews with 45 women with young children in Kaharole Upazila, Rangpur Division, in Bangladesh. Most respondents reported reduced income or job loss since the pandemic and could not afford to purchase staples and nutrient-rich foods. Young children and pregnant women were at risk of having inadequate diets. The households used stress coping mechanisms such as selling livestock, taking loans, and spending savings several times. The coping mechanisms again put the respondents into a vicious economic and severe mental stress cycle as they had no way to repay the loan. Respondents expressed helplessness and frustration as a result of the economic downturn. There was a lack of relief assistance from local governments or civil societies. Our findings showed poor Bangladesh women faced financial hardship, limited food choices, and provisional coping strategies. It is advised that disaster relief efforts be directed toward helping the affected population maintain their standard of living and building local community resilience.

Spatial and temporal trends in food security during the COVID-19 pandemic in Asia Pacific countries: India, Indonesia, Myanmar, and Vietnam

Kang Yunhee,Prihartono Indira,Kim Sanghyo,Kim Subin,Lee Soomin,Spadoni Randall,McCormack John,Wetzler Erica 한국영양학회 2024 Nutrition Research and Practice Vol.18 No.1

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. 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.

Building a Notification based Test-bed for Second Battery Pin Testing

Yunhee Kang ICT플랫폼학회 2017 JOURNAL OF PLATFORM TECHNOLOGY Vol.5 No.4

Design Scheme for Mashup based Internet Application

Yunhee Kang,SeungHyun Nam 한국정보기술학회 2011 Proceedings of KIIT Conference Vol.2011 No.5

This paper discusses a design scheme for a mashup based Internet applications. We propose a system architecture for seamlessly integrating a portal for end-user and a data analysis application. The system architecture is applied to a mashup application for integrating an Internet-based application and data analysis application. In the application, we consider a binary data format to define the data structure representing a message signature, cache scheme to maintain the result of end-user query and pub/sub based middleware, to connect loosely with subsystems.

Chlamydospore Induction from Conidia of Cylindrocarpon destructans Isolated from Ginseng in Korea

Kang, Yunhee,Kim, Mi Ran,Kim, Ki Hong,Lee, Jungkwan,Lee, Seung-Ho The Korean Society of Mycology 2016 Mycobiology Vol.44 No.1

Cylindrocarpon destructans causes root rot disease in ginseng and can survive for a long time, producing chlamydospores. We optimized conditions to induce chlamydospore production from the conidia of C. destructans, isolated from Korean ginseng. This will provide the basis for testing the efficacy of control agents targeting these chlamydospores.