• Journal of the korean society of oceanography
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• 제37권1호
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• pp.27-34
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• 2002

We measured the alkenone concentration of bulk sediments from a piston core collected from the Ulleung Basin in the East Sea in order to reconstruct past sea surface temperatures (SST). Sediment ages are well constrained by AMS $^{14}C$ dates of the planktonic foraminifera Globigerina bulloides. Coretop alkenone SST calibration with modern surface temperatures and sediment trap dat (Hong et al., 1996) indicate that the SST estimated from alkenones most likely represent the temperatures of late fall. Downcore variations in the alkenone saturation index indicate that between 19 and 15 kyr BP the surface waters were about $3^{\circ}C$ warmer than today. Between 15 and 11 kyr BP, the temperatures were about $3^{\circ}C$ lower than today. A rapid SST increase of about $3^{\circ}C$ occurred at approximately 10 kyr BP. After considering the factors which might influence the SST reconstruction from the $U^{k'}_{37}$ values, we conclude that the alkenone temperature estimates are reliable. The reason for glacial warming in the East Sea is not clear, although there is a possibility that it could be caused by shift in the season of maximum alkenone production from summer during the last glaciation to late fall during the Holocene. Cooling between 15 and 11 kyr BP may be due to inflow of cold water into the East Sea such as via the Oyashio Current or ice-melt water. Warming at the early Holocene could be due to inflow of the Tsushima Current into the East Sea through the Korea Strait.

• The Journal of Asian Finance, Economics and Business
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• 제7권9호
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• pp.467-475
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• 2020

The study aims to investigate factors affecting enterprise's satisfaction and loyalty toward the Social Security's online public services, looking at the case of Thanh Hoa province, Vietnam. This study employs samples with 216 enterprises that use online public system of Thanh Hoa province's Social Security. The research model is closely linked to the SERVQUAL model developed by Parasuraman, Zeithaml and Berry (1988). We propose 23 scales that constitute the quality of service, three scales that constitute Customer Satisfaction and three components that constitute Customer Loyalty. This study use the tool of Exploratory Factor Analysis (EFA), Cronbach's Alpha test, Confirm Factor Analysis (CFA) and Structural Equation Modeling (SEM) in order to address the question of satisfaction and loyalty. The result shows that the factor with the most impact is Reliability, next is Capacity of staffs, Tangibles, Attitude of staffs, and the least impacting factor is Empathy; moreover, the results also show that Satisfaction has a strong impact on Customer Loyalty. The findings of this study suggest that Thanh Hoa province's Social Security should: (i) strengthen the reliability of online service system; (ii) build capacity for staffs; (iii) develop the responsiveness of electronic transactions systems; and (iv) improve the empathy of staffs.

• 한국정보처리학회논문지
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• 제7권4호
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• pp.1033-1043
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• 2000

최근 NoD(News-on-Demand)에 대한 사용자의 요구가 증가함에 따라, 이러한 요구를 충족시키기 위한 많은 연구가 진행중에 있다. 그러니 뉴스 비디오 데디터는 짧은 생명주기, 앵커를 중시미으로 한 주기적 변화로인해 기존의 비디오 저장방식을 그대로 용하기가 어렵다. 이릉 위해, 본 논문에서는 NoD서비스용 멀티미디어 데이터의 효율적인 저장 및 검색을 위한 하부저장 관리자를 설계 및 구현하다. 하부 저장 관리자는 멀티미디어 객체 지체의 비디오 스트림 데이터와 색인 정보를 효율적으로 저장하고 관리하며, 텍스트 기반 검색을 위해 역화일 기법과 고차훤 특징 벡터의 색인을 위해 X-트리 구조를 제공한다. 아울러 하부 저장 관리자는 계층적인 뉴스 비디오 객체로부터 추출된 부가적인 정보들은 효율적으로 저장할 수 있는 저장 API(Application Program Interpace)와 커서를 통한 사용자의 편리한 검색을 지원하는 검색API를 제공한다. 마지막으로 하부 저장 관리자는 SHORE(Scalable Heterogeneous Object REpository) 저장 시스템을 이용하여 UNLX 운영체제 하엣 표준 C++언어를 사용하여 구현하였다. 구현하였다.

• 한국정보처리학회논문지
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• 제7권2S호
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• pp.721-732
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• 2000

Multimedia communication systems require not only high-performance computer hardwares and high-speed networks, but also a buffer management mechanism to process many data efficiently. Two buffer handling methods, Push and Pull, are commonly used. In the Push method, a server controls the flow of dat to a client, while in the Pull method, a client controls the flow of data from a server. Those buffering schemes can be applied to the data transfer between the packet receiving buffer, which receives media data from a network server, and media playout devices, which play the recived media data. However, the buffer management mechanism in client-sides mainly support either one of the Push or the Pull method. Consequently, they have some limitations to support various media playout devices. Futhermore, even though some of them support both methods, it is difficult to use since they can't provide a unified structure. To resolved these problems, in this paper, we propose an efficient and flexible Push/Pull buffer management mechanism at client-side. The proposed buffer management scheme supports both Push and Pull method to provide various media playout devices and to support buffering function to absorb network jitter. The proposed scheme can support the various media playback devices using a single buffer space which in consequence, saves memory space compared to the case that a client keeps tow types of buffers. Moreover, it facilitates the single buffer as a mechanism for the absorbing network jitter effectively and efficiently. The proposed scheme has been implemented in an existing multimedia communication system, so called ISSA (Integrated Streaming Service Architecture), and it shows a good performance result compared to the conventional buffering methods in multimedia communication environments.

• 한국작물학회지
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• 제44권2호
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• pp.143-148
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• 1999

Soil moisture condition is an important limiting factor in growth and yield in rice culture. The purpose of this study was to compare the influence on the growth, yield and Quality of rice subjected to soil moisture stress (SMS) at different growth stages. Ajaponica rice cultivar, Dongjinbyeo, was cultured under flooded conditions in a plastic container filled with silty loam soil. The container was subjected to SMS until the initial wilting point (IWP) coincided with about 10% in soil moisture content and about-200 kPa in soil matric potential, and was then irrigated again, at 6 and 5 of main growth stage in 1996 and 1997, respectively. At maturity, the plant height, tiller number, leaf area and top dry weight were decreased more in SMS treatments at the early stage than the late stage. The averaged yield index of SMS to control in both years was lowest at meiosis (62.5%), which primarily resulted from lower percent ripened grain and 1,000 grain weight, and second＇ reduced the spikelet number per panicle and panicle number per hill, and followed at tillering stage (68.5%) which resulted from the lower production in tiller number and top dry matter during and after SMS treatment. The percent-age of read rice in SMS plants varied with the treatment stage as order of lower at meiosis (44.0%), heading (53.9%), panicle initiation (70.1%), tillering (72.1%), ripening (75.8%) and 5 days after transplanting (DAT) (79.0%). Protein content in brown rice was slightly larger in SMS at late growth stage than the control, while the contents of fat and ash differed very little between SMS and control. Contents of Mg and K and Mg/K in brown rice with SMS were lower at some treatment stages such as at ripening or panicle initiation.

• The Journal of Asian Finance, Economics and Business
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• 제7권7호
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• pp.293-302
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• 2020

Capital mobilization is a traditional business of commercial banks and is one of the core foundations for the development of a bank. Capital mobilization is the main input in the operation of a bank, and this is also the basis for generating output for credit activities as well as other banking activities. This study aims to determine the main factors that affect the decisions of individual customers to put savings deposit in Vietnamese commercial banks. Survey data collected from 403 individual customers were analyzed to provide evidence. The results from the multiple regression analysis by using SPSS software revealed that all scales in this study were reliable, and there were six components impacting the savings deposit decision of individual customers from the strongest to the weakest in the following order: the form of promotion, bank brand, service quality, interest rate policy, and employee knowledge and attitude. Besides, the finding showed customers who have high income tend to have a stronger decision on savings deposits in commercial banks. The main findings of this article provide some empirical implications for marketers in banks and serve as a suggestion to improve these factors in order to retain and attract individual customers' savings deposit decisions.

• Parasites, Hosts and Diseases
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• 제53권4호
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• pp.379-383
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• 2015

Visceral leishmaniasis (VL) or kala-azar mainly affects children in endemic areas. This study was conducted to determine the seroprevalence of VL using direct agglutination test (DAT) in children living in rural districts of Alborz Province located 30 km from Tehran capital city of Iran. Multi-stage cluster random sampling was applied. Blood samples were randomly collected from 1,007 children under 10 years of age in the clusters. A total of 37 (3.7%) of the studied population showed anti-Leishmania infantum antibodies with titers of ${\geq}1:800$. There was a significant association between positive sera and various parts of the rural areas of Alborz Province (P<0.002). Two children with anti-Leishmania infantum antibodies titers of ${\geq}1:3,200$ indicated kala-azar clinical features and treated with anti-leishmaniasis drugs in pediatric hospital. The findings of this study indicated that Leishmania infection is prevalent in rural areas of Alborz Province. Therefore, it is necessary to increase the awareness and alertness among physicians and public health managers, particularly in high-risk rural areas of the province in Iran.

• Natural Product Sciences
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• 제21권3호
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• pp.176-184
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• 2015

In our search for natural soluble epoxide hydrolase (sEH) inhibitors from plants, an extract of the dried whole plants of Euphorbia supina Rafin was found to significantly inhibit sEH activity in vitro. Phytochemical investigation of E. supina resulted in isolation of 17 compounds (1 - 17), including triterpenes (1 - 4), phenolic compounds (5 - 8), and flavonoid derivatives (9 - 17). The structures of the isolated compounds were established mainly by extensive analysis of the 1D and 2D NMR, and MS data. All of the isolated compounds were evaluated for their sEH inhibitory activity. Among the isolated phenolic compounds, 8 was identified as a significant inhibitor of sEH, with an IC₅₀ value of 15.4 ± 1.3 μM. Additionally, a kinetic analysis of isolated compounds (2, 5, 8 - 11, 13, and 17) indicated that the inhibitory effects of flavonoid derivatives 10 and 11 were of mixed-type, with inhibitory constants (K_i) ranging from 3.6 ± 0.8 to 21.8 ± 1.0 μM, whereas compounds 2, 5, 8, 9, 13, and 17 were non-competitive inhibitors with inhibition K_i values ranging from 3.3 ± 0.2 to 39.5 ± 0.0 μM.

• 한국잡초학회지
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• 제9권3호
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• pp.238-244
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• 1989

신규(新規) 제초제(除草劑)에 dithiopyr의 제초효과(除草效果) 변화(變化)에 미치는 각종(各種) 재배(栽培) 화경조건(環境條件)의 영향(影響)에 대하여 조사(調査)한 바 다음과 같은 결과(結果)를 얻었다. Dithiopyr는 추천약량(推薦藥量)의 1/3수준(水準)인 0.04kg a.i./ha 약량(藥量)에서도 피, 물달개비 등에 대하여 89.3% 이상의 효과(效果)가 있었고, 0.08kg a.i./ha 약량(藥量) 이상부터는 100%의 방제율(防除率)을 보였다. 제초효과(除草效果)는 토성(土性), 누수량(漏水量), 온도(溫度), 담수심(湛水深), 관수시간(換水時間)의 차이(差異)에 따른 영향을 거의 받지 않았다. 제초효과(除草效果)는 이앙전(移秧前) 처리(處理) 혹은 이앙(移秧) 후(後) 12일 이상(以上)의 처리(處理)보다는 5-8일 처리(處理)가 높았다.

• 인터넷정보학회논문지
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• 제1권1호
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• pp.95-104
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• 2000

일반적으로 유선망을 통한 인터넷 접속은 의료영상과 같이 대용량의 데이터를 전송하기에는 잔송속도가 매우 낮다. 인터넷의 이러한 문제를 해결하기 위해 본 연구에서는 고속의 위성 인터넷 통신을 위한 비대칭 위성 데이터 통신 시스템을 개발하였다. 비대칭 위성 데이터 통신은 데이터 경로가 비대칭인 것으로 데이터의 요청은 유선망을 통하고 대용량 데이터의 수신은 위성을 통하는 방식이다. 본 비대칭 위성 데이터 통신 시스템은 기존의 유선망에 비해 약 10-30배의 전송속도 향상의 결과를 얻을 수 있었다. 또한 인터넷을 통해 인증된 모든 병원으로부터 원격 의료를 수행할 수 있는 웹 기반의 원격의료시스템을 개발하였다. 이 시스템은 Java를 이용하여 개발하였으며 별도의 도구를 구입하지 않더라도 넷스케이프와 같은 웹 브라우저를 통해 세계 어디에서나 의료 영상과 정보를 접속하고 검색할 수 있는 기능을 가지고 있다. 원격의료시스템의 전송 속도를 향상시키기 위해 JPEG을 통해 영상을 압축하였다. 결론적으로 우리는 제안한 비대칭 위성기술과 웹 기술을 이용하여 고속의 범용 원격의료시스템을 개발할 수 있었으며 이를 이용하여 의료영상시스템을 병원내부용도에서 범용의 원격의료시스템으로 그 범위를 확장시킬 수 있었다.