• Journal of Fisheries and Marine Sciences Education
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• v.7 no.1
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• pp.14-30
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• 1995

한국(韓國)의 연근해어업(沿近海漁業)은 국내외 여건의 변화로 경쟁력(競爭力)을 잃어가고 있다. 따라서 구조개선(構造改善)을 통한 활로개척의 필요성이 강하게 대두되고 있으나, 중앙정부(中央政府) 차원의 어업여건(漁業與件) 개선은 장기간이 소요될 것으로 예상된다. 따라서 지방화시대(地方化時代)를 맞이하여 수산정책(水産政策)도 지방정책(地方政策)에 의한 지역적 특성을 가진 정책으로 발전시켜나갈 필요가 있다. 여기에서는 그런 차원에서 본토(本土)와는 지리적(地理的), 사회적(社會的), 경제적(經濟的)으로 상당히 독립된 특성을 가지고 있는 제주도(濟州道)에 있어서의 연근해어업(沿近海漁業)에 관한 각종 자료를 이용하여 어업의 현황을 분석하고, 나아가 생산성(生産性)을 보다 향상시킬 수 있는 어업구조(漁業構造)의 개선방향(改善方向)에 관하여 연구하였다. 그 연구결과(硏究結果)는 다음과 같다. 1. 제주도(濟州道) 연근해어업(沿近海漁業)의 실태(實態) 1) 어업인구(漁業人口)는 계속 감소하고 있으며 부녀자(婦女子) 비율이 뚜렷하게 높다. 2) 어선세력(漁船勢力)은 10톤이하의 소형선(小型船)이 꾸준히 증가되고 있으며, 10~50톤급의 증가률(增加率)도 매우 높다. 3) 어항(漁港)은 107개가 있으나 그중 80%는 비법정(非法定)의 소규모(小規模) 어항(漁港)이었다. 4) 어선어업(漁船漁業)은 연승(延繩) 유자망(流刺網) 채낚기 분기초망어업(焚寄抄網漁業) 등을 중심으로 이루어지고 있다. 5) 생산물(生産物)의 종류는 어류(魚類)가 주축을 이루고 있고, 대부분 고급(高級) 어종(魚種)이며, 가격은 상당히 높다. 6) 어선어업(漁船漁業)의 한어기(閑漁期)에 관광산업(觀光産業)과 연계하여 운영하고 있는 유어어업(遊漁漁業)은 상당히 발전할 소지를 가지 고 있다. 2. 문제점(問題點) 1) 어업인구(漁業人口)는 감소하는 반면 부녀자(婦女子)의 참여율은 높아 어선어업(漁船漁業)에 종사할 인력의 수급이 어려우며, 이것이 조업규모(操業規模)를 지속적으로 확대하지 못하는 요인이 되고 있다. 2) 어항시설(漁港施設)이 미비하여 어선어업(漁船漁業)의 규모를 확대시키기가 곤란하다. 3) 연근해어업(沿近海漁業) 어획물(漁獲物)의 판매를 위한 제도 및 시설이 소비환경(消費環境) 및 기호변화(嗜好變化)에 적절히 대응하지 못하고 있다. 4) 유어어선(遊漁漁船)의 운영기반(運營基盤)이 취약하여 활성화되지 못하고 있다. 5) 어업의 경쟁력 확보를 위한 기술교육(技術敎育) 및 연구(硏究) 지도체제(指導體制)가 취약하다. 3. 구조개선(構造改善)의 방향(方向) 1) 어업인력(漁業人力)의 안정적인 수급(需給)을 위하여 어민(漁民)의 정주환경(定住環境)을 개선하고, 어민후계자(漁民後繼者) 육성사업(育成事業)의 자금지원 수준을 향상시켜야 하며, 수산고등학교(水産高等學校) 졸업자(卒業者)를 수산계대학(水産系大學)에 일정 비율 정원외(定員外) 특예입학(特例入學) 시킴으로써 기술(技術)의 고도화(高度化)와 어촌 정착 동기를 높여 주어야 한다. 2) 어업인력(漁業人力) 감소에 대비하여 어선의 장비를 현대화, 생력화(省力化)하여 적은 인력으로도 운영이 가능하도록 유도하여야 한다. 3) 어업의 경쟁력 확보를 위해 어항시설(漁港施設)을 확충하고, 소비자(消費者)의 기호변화(嗜好變化)에 대응하여 위탁판매(委託販賣) 장소를 중심으로 종합어시장(綜合魚市場)을 개설해야 하며, 이와는 별도로 활어위판장(活魚委販場)을 시설하여 어획물(漁獲物) 부가가치제고(附加價値提高) 및 유통개선(流通改善)을 이루어야 할 것이다. 4) 유어어선(遊漁漁船)의 운영도 편의시설(便宜施設)을 확충하고 인공어장(人工漁場)의 조성을 추진하여 안정적인 부업으로 정착될 수 있도록 하는 노력이 필요하다. 5) 연구(硏究) 지도(指導)의 강화를 위하여 제주도(濟州道)에 소재하고 있는 연구(硏究) 지도기관(指導機關)을 적극적으로 활용함은 물론, 필요하다면 기관을 개편 증설하고, 어업인력(漁業人力)의 질적 향상을 위한 어민교육원(漁民敎育院)의 설립도 검토해 볼 필요가 있다.

• Journal of Digital Convergence
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• v.18 no.6
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• pp.53-63
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• 2020

Electronic financial transactions are also actively increasing due to the rapid spread of information communication media such as the Internet, smart devices, and IoT, but as a derivative by-product, threats of financial security such as leakage of various personal information and hacking are also increasing. Therefore, the importance of financial security against this is increasing, but in Korea, financial security technology is relatively insufficient compared to advanced countries in the field of financial security, such as Active-X. Therefore, this study aims to present the major development direction in the domestic financial security field by comparing key technology trends with IPC classification frequency analysis, keyword frequency analysis, and keyword network analysis based on domestic and foreign financial security-related patent data. In conclusion, it seems that recent domestic and foreign trends have focused on the development of related technologies according to the development of smart device-based electronic financial services. Accordingly, it is intended to be used as the basis data for technology development of financial security by mapping the trend of financial security research trend and technology trend analysis through thesis data analysis that reflects the research of the preceding aspect as the technology of commercialization in the future.

• Korean Journal of Environment and Ecology
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• v.34 no.5
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• pp.413-424
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• 2020

Environmental policies and industry practices have recently seen a gradual paradigm shift from reactive management to proactive prevention of environmental impacts. Accordingly, preventive conservation policies are carried out to address the increasing value of protecting soils and soil functions as resources are limited. To propose a direction for future soil erosion research, we analyzed domestic and international research trends of soil erosion, based on journal papers retrieved from the Web of Science databases over the last decade, using VOSviewer for keyword co-occurrence analysis. The results showed that the number of publications on soil erosion per land area in Korea ranked high worldwide. In particular, studies on the soil erosion control were found to account for a more significant proportion than other countries. The active ongoing studies on soil erosion in Korea indicate that the country has recognized the severity of soil erosion resulting from climate, topography, and land use. However, the number of keywords found in the studies on the soil erosion control in Korea was relatively smaller than those found at the international level, indicating the need to diversify and expand the study subjects. In particular, studies on the soil erosion process and the related physical and chemical soil properties are necessary to find the fundamental solutions to soil erosion problems.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.58 no.2
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• pp.136-141
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• 2013

This study was conducted to investigate upland crop at reclaimed sand land 'Saemangeum' for early desalination purpose and to investigate the growth and yield of whole crop barley, which was acceded after summer crop of corn and rice. Seedling establishment of whole crop barley were 216 seedlings/$m^2$(25%) for non-flooding, 43% for 1 month and 58% for 2, 3 month flooding. And it was 60% in rice cultivation. Soil salt concentration was 0.5% in non-flooding treatment, however flooding treatments decreased to 0.2% or less. In general soil salt concentration increased until the middle stage of growing, then became to similar level as the seeding time. Plant height, stem length and number of tiller were increased with flooding treatment. Whole crop barley yield was significantly reduced in non-flooding treatment but rapidly increased by flooding treatment. Yielding at 3 months increased by 504% compared to non-flooding, and rice cultivation was also increased by 536%. Protein and fiber content was low in 1 month flooding treatment, 3 months flooding and rice cultivation showed the similar results in terms of feed value. For desalination purpose in reclaimed land, 3 months flooding treatments of rice cultivation could result in higher yielding for upland crop, such as whole crop barley.

• Korean Journal of Agricultural and Forest Meteorology
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• v.19 no.3
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• pp.93-101
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• 2017

The distribution of inter-annual variation in temperature would help evaluate the likelihood of a climatic risk and assess suitable zones of crops under climate change. In this study, we evaluated two methods to estimate the standard deviation of temperature in the areas where weather information is limited. We calculated the monthly standard deviation of temperature by collecting temperature at 0600 and 1500 local standard time from 10 automated weather stations (AWS). These weather stations were installed in the range of 8 to 1,073m above sea level within a mountainous catchment for 2011-2015. The observed values were compared with estimates, which were calculated using a geospatial correction scheme to derive the site-specific temperature. Those estimates explained 88 and 86% of the temperature variations at 0600 and 1500 LST, respectively. However, it often underestimated the temperatures. In the spring and fall, it tended to had different variance (e.g., increasing or decreasing pattern) from lower to higher elevation with the observed values. A regression analysis was also conducted to quantify the relationship between the standard deviation in temperature and the topography. The regression equation explained a relatively large variation of the monthly standard deviation when lapse-rate corrected temperature, basic topographical variables (e.g., slope, and aspect) and topographical variables related to temperature (e.g., thermal belt, cold air drainage, and brightness index) were used. The coefficient of determination for the regression analysis ranged between 0.46 and 0.98. It was expected that the regression model could account for 70% of the spatial variation of the standard deviation when the monthly standard deviation was predicted by using the minimum-maximum effective range of topographical variables for the area.

• Journal of Digital Convergence
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• v.15 no.11
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• pp.245-250
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• 2017

Flash floods is defined as the flooding of intense rainfall over a relatively small area that flows through river and valley rapidly in short time with no advance warning. So that it can cause damage property and casuality. This study is to establish the flash-flood warning system using 38 accident data, reported from the National Disaster Information Center and Land Surface Model(TOPLATS) between 2009 and 2012. Three variables were used in the Land Surface Model: precipitation, soil moisture, and surface runoff. The three variables of 6 hours preceding flash flood were reduced to 3 factors through factor analysis. Decision tree, random forest, Naive Bayes, Support Vector Machine, and logistic regression model are considered as big data methods. The prediction performance was evaluated by comparison of Accuracy, Kappa, TP Rate, FP Rate and F-Measure. The best method was suggested based on reproducibility evaluation at the each points of flash flood occurrence and predicted count versus actual count using 4 years data.

• Journal of the Korea Concrete Institute
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• v.29 no.4
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• pp.379-387
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• 2017

The objective of this study is to develop sustainable PVA fiber-reinforced cementitious composites (FRCCs) that could exhibit comparable strength level to normal PVA FRCCs with no recycled materials. To evaluate mechanical properties of the FRCCs, compressive, flexural and direct tensile tests were conducted. In addition to the test, to calculate amount of carbon dioxide ($CO_2$) emission at the stage of manufacturing the FRCCs, life cycle inventory data base (LCI DB) were referenced from domestic and Japan. From the test results, the mechanical properties such as compressive, flexural and direct tensile strengths were decreased as the replacement ratio of recycled materials increased. And it was determined that the amount of $CO_2$ emission was reduced for the specimens with higher water-binder ratio (W/B) and replacement ratios. It was also found that binder intensity ($B_i$) value was higher as replacement ratio of fly ash (FA) increased. This result means that larger amount of FA is need to deliver one unit of a given performance indicator (1 MPa of strength) of FRCCs compared to that of ordinary portland cement (OPC). As a result, it could be concluded that FRCCs with W/B 45% replaced by FA 25% and recycled sand (RS) 25% is desirable for both target performance and $CO_2$ emission.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.6
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• pp.482-494
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• 2016

This study examines the longitudinal trends regarding awareness of informatization, Information Technology (IT) use, and attitudes towards IT among older adults aged 60 or over. Surveys were conducted in 2004 and 2014 at senior welfare centers in Seoul, Korea. The trends between 2004 and 2014 showed that the rate of Internet use increased among older adults who lived alone, were aged 70 or over, had middle education level, had low income, or were unemployed. Older adults had positive attitudes towards IT, and users were more positive than non-users. The levels of IT use were low among users, and their reasons for IT use were for psychological, emotional, and practical purposes. For non-users of IT, their passive tendencies toward IT use and informatization were amplified. As such, the state of IT use and attitudes toward it among older adults in Seoul were longitudinally different, and the differences in awareness and ability between users and non-users tended to increase.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.38 no.8
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• pp.62-71
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• 2001

This paper presents a design of the real-time digital image enhancement preprocessor for CMOS image sensor. CMOS image sensor offers various advantages while it provides lower-quality images than CCD does. In order to compensate for the physical limitation of CMOS sensor, the spatially adaptive contrast enhancement algorithm was incorporated into the preprocessor with color interpolation, gamma correction, and automatic exposure control. The efficient hardware architecture for the preprocessor is proposed and was simulated in VHDL. It is composed of about 19K logic gates, which is suitable for low-cost one-chip PC camera. The test system was implemented on Altera Flex EPF10KGC503-3 FPGA chip in real-time mode, and performed successfully.

• Korean Journal of Plant Resources
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• v.10 no.1
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• pp.45-49
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• 1997

This experiment was carried out to know the effects of aerial part cutting on the growth and root yield of Achyranthes japonica. The various cutting treatments were tested. Cutting treaments were 20cm and 30cm cutting from the apical part of plant, when plant height was 30cm and 50cm, respectively. The seed amount was the largest at non-cutting, indication that cutting treatment inhibits fruiting. The most effective treatment for the root growth was 30cm cutting just before flowering time. Cutting just before flowering time increased root diameter, length and root weight comparing with non-cutting.