• Korean Journal of Plant Resources
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• v.30 no.5
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• pp.556-564
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• 2017

Appropriate soil temperature and early planting of potato is very important for the successful potato-soybean cropping system in central region of South Korea. This experiment was carried out to determine the effect of mulching materials on the growth and yield of potato (Solanum tuberosum L.). Five different mulch treatments were had been applied on an upland soil as follows ; no mulch (NM), transparent film (TF), transparent film + additional transparent film (TF + ATF), black film (BF), and black film + additional transparent film (ATF). In the period of sowing time to removing additional films, mean soil temperature of the treatments was in the order of TF+ATF > TF > BR+ATF > BF as $20.3^{\circ}C$ > $18.5^{\circ}C$ > $16.1^{\circ}C$ > $15.4^{\circ}C$, respectively and that of NM was $13.8^{\circ}C$. The accumulated soil temperature was TF > NM > BF during the removing additional films to earthing at inter-tillage. On the changes in the soil temperature during a whole day, the temperature in the BF was lower than NM during around 18:00 PM to 12:00 NM, while NM was higher than BF in the time period of 10:00AM to 21:00PM. The sequence of potato sprout emergence was 15 > 18 > 20 > 22 days of TF+ATF, TF, BF+ATF, and BF, respectively and that of NM was 24 days. Comparing to the NM, potato sprout emergence was observed on the TF+ATF treated plot as early as 9 days. At 10 days before harvest, the significant difference in the tuber dry weight had been observed and the sequence tuber weight was in the order of TF > TF+ATF > BF+ATF > BF > NM. The potato yields of TF, TF+ATF, and BF+ATF were increased of 40.7, 37.3, and 22% as compared to NM ($2,805kg\;10a^{-1}$), but almost same yield in the BF. The differences of tuber dry weight and potato yields was co-related with the temperature rise of soil by the application of mulching materials on soil. Based on these results, application of mulching film had been very effective to increase the tuber size and the yield of potato by the temperature rise during seedling stage of potato. Transparent mulching was better than black mulching especially for the emergence of sprout of potato in relation to minimizing cooling injury.

• Microbiology and Biotechnology Letters
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• v.48 no.3
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• pp.344-357
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• 2020

Strain improvement and bioprocess development were undertaken to enhance hyaluronic acid(HA) production by Streptococcus zooepidemicus cells. Using a high-yielding mutant strain, statistical medium optimization was carried out in shake flask cultures, resulting in 52% increase in HA production (5.38 g/l) at the optimal medium composition relative to the parallel control cultures. For sufficient supply of dissolved oxygen (DO), which turned out to be crucial for enhanced production of HA, agitation system and speed were intensively investigated in 5 L bioreactor cultures. Increase in oxygen mass transfer coefficient (k_La) through increment of agitation speed (rpm) and 35% expansion of diameter of the newly-designed impellers showed significantly positive effects on HA production. By installing an expanded Rushton-turbine impeller for efficient break-down of sparged air, and an extended marine impeller above the Rushton-turbine impeller for efficient mixing of the air-born viscous fermentation broth, maximum amount of HA (9.79 g/l) was obtained at 450 rpm, 1.8 times higher level than that of the corresponding flask culture. Subsequently, the possibility of bioprocess scale-up to a 50 L bioreactor was investigated. Despite almost identical maximum HA production (9.11 vs 9.25 g/l), the average HA volumetric productivity (r_p) of the 50 L culture turned out only 74% compared to the corresponding 5 L culture during the exponential phase, possibly caused by shear damages imposed on the producing cells at the high stirring in the 50 L culture. The scale-up process could be successfully achieved if a scale-up criterion of constant oxygen mass transfer coefficient (k_La) is applied to the 50 L pilot-scale bioreactor system.

• Korean Journal of Occupational Health Nursing
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• v.2
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• pp.26-39
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• 1992

본 연구는 보건관리대행기관에 근무하는 산업간호사들의 보건관리업무실태 및 근무만족도와 이들간의 관계를 파악함으로써, 산업간호업무향상 및 효율적인 산업보건관리를 위한 기초자료로 제시하고자 시도되었다. 조사대상은 38개 보건관리대행기관중 24개 기관에 근무하는 산업간호사 118명중 97명을 대상으로 하였다. 연구기간은 '92년 5월부터 6월까지 설문조사를 실시하였으며 그중 89명이 설문에 응답하여 이를 분석 대상으로 하였다. 연구결과는 다음과 같다. 첫째, 보건관리대행기관의 간호사는 산업간호사의 일반적 특성과 비교해볼 때 기존 산업간호사와 유사하였다. 그러나 법정휴가를 받는다는 간호사가 59.1%로 더 낮았다. 둘째, 보건관리대행기관 산업간호사의 담당사업장수는 법적으로 30개 사업장, 2,000명의 근로자를 담당하도록 되어있는데 조사결과 법적기준인 보건관리사업장의 수를 담당하는 간호사는 57.1%를 차지하였고, 담당 근로자 수로 볼때는 2,000명이하가 29.8%를 차지하여 많은 산업간호사가 법적인 기준을 초과하여 산업보건관리를 대행하고 있는 것으로 나타났다. 셋째, 보건관리대행의 방문방법으로 교통편은 대행 기관차량을 이용하며, 간호사 혼자 산업장을 방문하는 것이 대부분으로 나타났고, 방문횟수는 100인미만이 월1회, 100인이상이 월2회로 규정된 것과 비교해보면 규정을 따르는 곳이 100인 미만의 경우 97.4%, 100인이상의 경우 86.4%였다. 또한 의사나 위생사는 방문을 안하거나 년1-5회 방문하는 것으로 나타나 보건관리대행의 주제공자는 간호사인 것으로 냐타났다. 또한 사업장 방문시 업무수행장소는 휴게실이나 사무실이 87.5%, 현장이나 수위실에서 하는 곳이 70.5%나 되어 뚜렷이 업무를 수행할 장소가 마련되지 않은 실정을 나타냈다. 네째, 보건관리대행에 근무하는 산업간호사의 애로사항은 사업장내에서는 조직과 체계상의 문제, 간호사 역할에 대한 인식부족, 권한과 자율성 부족 등을 들었고, 사업장 방문시에는 사업주와 근로자의 인식부족이 우선적으로 지적되었다. 또한 산업간호사는 보건관리 대행업무에서 사업장의 참여유도, 사업장 순회점검 및 개선지도, 보건교육, 건강상담이 우선적으로 실시되어야 한다고 하였다. 다섯째, 보건관리대행기관 산업간호사의 업무수행정도는 건강검진이나 직업병관리, 보건교육, 환경위생관리업무를 비교적 많이 실시하는 것으로 나타났다. 여섯째, 보건관리대행기관 산업간호사의 직무만족도는 전문적 위치나 상호작용, 업무요구등은 높게 나타났으나 보수와 산업보건관계자와의 관계등은 만족도가 낮게 나타났다. 또한 직무만족도에 대한 총화점수는 사업장근무자가 240점중 143.8인데 비해 보건관리대행기관 근무자는 230점중 129.61점으로 더 낮게 나타났다. 일곱째, 일반적 특성별 보건관리대행 산업간호사의 직무수행정도는 연령별 30세이상군이, 결혼상태별로 기혼군이, 경력은 1년이상인 군이, 근무시간 8시간인군이, 급여수준은 50만원이상인군이, 법정휴가가 있는 군이, 자질향상교육을 받은군이 담당사업장수가 30개이하인 군이, 더 높게 나타났다. 또한 연령군이 20-24군과 30세이상인군 (p<0.05), 결혼상태별로 기혼군과 미혼군(p<0.01), 급여수준별로 50만원미만군과 이상인 군(p<0.05), 법정휴가가 있는 군과 없는군(p<0.05), 자질향상 교육을 받은군과 받지못한 군(p<0.01), 담당사업장수가 30이하인 군과 31인이상인 군(p<0.05) 간에 유의한 차이를 보였다. 즉 산업간호사중 나이가 많고, 기혼이며 급여수준이 높고 법정휴가와 교육을 받고, 담당사업장수가 30이하인 군이 보건관리대행업무를 잘 수행하는 것으로 나타났다. 여덟째, 일반적 특성별 보건관리대행 산업간호사의 직무만족도는 연령별 30세이상군이, 결혼상태별로 기혼군이 경력은 1년이상인 군이, 근무시간 8시간인군이, 급여수준은 50만원이상군이, 법정휴가가있는군이, 자질향상교육을 받은군이, 담당사업장수가 30개이하인 군이 더 높게 나타났다. 또한 결혼상태별로 기혼군과 미혼군(p<0.01), 근무시간별로 8시간군과 9시간 이상인 군(p<0.01), 급여수준별 50만원 미만군과 이상군(p<0.05), 자질향상교육을 받은군과 받지 않은군(p<0.05) 사이에 유의한 차이를 보였다. 즉 산업간호사중 기혼이고 근무시간은 8시간이며 급여수준이 높고 자질향상교육을 받은 군이 만족도가 높은 것으로 나타났다. 아홉째, 보건관리대행기관 산업간호사의 업무수행정도와 직무만족도 사이의 상관관계를 보면 보수, 자율성, 업무요구가 높을수록 산업간호업무를 수행을 잘하는 것으로 나타났으며(상관관계 r>0.6, P>0.001), 전체적으로 총직무만족도와 업무수행정도와의 상관관계는 6346, P<0.001로서 만족도가 높을수록 업무수행정도가 높은 것으로 나타났다. 이상의 결과를 토대로하여 보면, 보건관리대행기관에 근무하는 산업간호사는 그 특성을 고려하여 업무도 사업장 근무자와 다르게 규정되어야 하며, 담당업무의 명확한 한계를 정해 중소규모사업장의 산업보건관리업무를 책임있게 수행할 수 있도록 뒷받침이 필요하다. 더불어, 직무만족도를 높일수 있도록, 산업간호사에 대한 다방면의 지원이 필요하다고 하겠다. 또한 보건관리대행기관 산업간호사는 나이가 많고 기혼이며 경력있는 간호사를 채용하고 근로조건을 잘 개선하면 직무수행정도가 더 높아질 것으로 보인다. 좋은 근로조건의 형성과 직무만족도 등을 높여 산업간호사의 직무를 효율적으로 수행할 수 있도록 하기 위하여는 보건관리대행기관에 관한 규정이 강화 보완되어야 하겠으며, 민간단체와 의료기관 뿐아니라 공공기관에서도 중소규모사업장의 보건관리업무를 담당하는 방향으로 전환하는 방안을 모색해 보아야 할 것이다.

• Journal of Environmental Impact Assessment
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• v.28 no.5
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• pp.440-456
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• 2019

The controversy of the risk perception related to particulate matters becomes significant. Therefore, in order to understand the nature of the particulate matters, we gathered articles and comments in on-line community related to bicycling which is affected by exposure of the particulate matters. As a result, firstly, the government - led particulate matter policy was strengthened and segmented every period, butthe risk perception related to particulate matters in the bicycle community has become active and serious. Second, as a result of analyzing the perception change of outdoor activities related to particulate matters, bicycle users in community showed a tendency of outdoor activity depending on the degree of particulate matters ratherthan the weather. In addition, the level of the risk perception related to particulate matters has been moved from fears of serious threat in daily life and health, combined with the disregard of domestic particulate matter levels or mask performance. Ultimately, these risk perception related to particulate matters have led some of the bicycling that were mainly enjoyed outdoors to the indoor space. However, in comparison with outdoor bicycling enjoyed by various factors such as scenery, people, and weather, the monotonous indoor bicycling was converted into another type of indoor exercise such as fitness and yoga. In summary, it was derived from mistrust of excessive information or policy provided by the government or local governments. It is considered that environmental policy should be implemented after discussion of risk communication that can reduce the gap between public anxiety and concern so as to cope with the risk perception related to particulate matters. Therefore,this study should be provided as an academic basis for the effective communication direction when decision makers establish the policy related to particulate matters.

• Korean Security Journal
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• no.39
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• pp.185-215
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• 2014

Since North Korea has used terror crime as a means of unification under communism against South Korea, South Korea has been much damaged until now. And the occurrence possibility of terror crime by North Korean authority is now higher than any other time. The North Korean terror crimes of Kim Il Sung era had been committed by the dictator's instruction with the object of securing governing fund. However, looking at the terror crimes committed for decades during Kim Jung Il authority, it is revealed that these terror crimes are expressed as a criminal behavior because of the conflict to accomplish the power and economic advantage non powerful groups target. This study focused on the power conflict in various causes of terror crimes by applying George B. Vold(1958)'s theory which explained power conflict between groups became a factor of crime, and found the aspect by ages of terror crime behavior by North Korean authority and responding plan to future North Korean terror crime. North Korean authority high-ranking officials were the Labor Party focusing on Juche Idea for decades in Kim Il Sung time. Afterwards, high-ranking officials were formed focusing on military authorities following Military First Policy at the beginning of Kim Jung Il authority, rapid power change has been done for recent 10 years. To arrange the aspect by times of terror crime following this power change, alienated party executives following the support of positive military first authority by Kim Jung Il after 1995 could not object to forcible terror crime behavior of military authority, and 1st, 2nd Yeongpyeong maritime war which happened this time was propelled by military first authority to show the power of military authority. After 2006, conservative party union enforced censorship and inspection on the trade business and foreign currency-earning of military authority while executing drastic purge. The shooting on Keumkangsan tourists that happened this time was a forcible terror crime by military authority following the pressure of conservative party. After October, 2008, first military reign union executed the launch of Gwanmyungsung No.2 long-range missile, second nuclear test, Daechung marine war, and Cheonanham attacking terror in order to highlight the importance and role of military authority. After September 2010, new reign union went through severe competition between new military authority and new mainstream and new military authority at this time executed highly professionalized terror crime such as cyber/electronic terror unlike past military authority. After July 2012, ICBM test launch, third nuclear test, cyber terror on Cheongwadae homepage of new mainstream association was the intention of Km Jung Eun to display his ability and check and adjust the power of party/military/cabinet/ public security organ, and he can attempt the unexpected terror crime in the future. North Korean terror crime has continued since 1980s when Kim Jung Il's power succession was carried out, and the power aspect by times has rapidly changed since 1994 when Kim Il Sung died and the terror crime became intense following the power combat between high-ranking officials and power conflict for right robbery. Now South Korea should install the specialized department which synthesizes and analyzes the information on North Korean high-ranking officials and reinforce the comprehensive information-collecting system through the protection and management of North Korean defectors and secret agents in order to determine the cause of North Korean terror crime and respond to it. And South Korea should participate positively in the international collaboration related to North Korean terror and make direct efforts to attract the international agreement to build the international cooperation for the response to North Korean terror crime. Also, we should try more to arrange the realistic countermeasure against North Korean cyber/electronic terror which was more diversified with the expertise terror escaping from existing forcible terror through enactment/revision of law related to cyber terror crime, organizing relevant institute and budget, training professional manpower, and technical development.

• Korean Journal of Cognitive Science
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• v.11 no.2
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• pp.37-51
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• 2000

The present study compared computer users target-selection response patterns when the targets were varied in terms of their relative location and distance from the current position of the cursor. In Experiment 1, where the mouse was used as an input device, the effects of different directions and distances of simple target(small rectangle) on target-selection response were investigated. The results of Experiment 1 can be summarized as follows: (1) Overshooting was more frequent than either undershooting or correct movement and (2) this tendency was more prominent when the targets were presented in the oblique direction or in farther location from the current cursor position. (3) Although the overshooting and undershooting were more frequent in the oblique direction, the degree of deviation was larger in horizontal and vertical direction. (4) Time spent in moving the mouse rather than that spent in planning, calibrating or clicking was found to be the most critical factor in determining total response time. In Experiment 2, effects of the font size and line-height of the target on target-selection response were compared with regard to two types of input devices(keyboard vs. mouse). The results are as follows: (1) Mouse generally yielded shorter target-selection time than keyboard. but this tendency was reversed when the targets were presented in horizontal and vertical directions. (2) In general, target-selection time was the longest in the condition of font size of 10 and line-height of 100%, and the shortest in the condition of font size of 12 and line-height of 150%. (3) When keyboard was used as the input device, target-selection time was shortest in the 150% line-height condition, whereas in the mouse condition, target-selection time tended to be increased as the line-height increased. which resulted in the significant interaction effect between input device and line-height. Finally, several issues relating to human-computer interaction were discussed based on the results of the present study.

• Journal of Nutrition and Health
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• v.54 no.1
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• pp.39-53
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• 2021

Purpose: This study examined the dietary behavior, health status and nutrient intake by considering the level of household income of elderly people using data obtained from the Korea National Health and Nutrition Survey (KNHANES VII) 2018. Methods: The study subjects were 1,355 elderly people over 65 years old (558 men, 797 women). Based on their household income, participants were classified into three groups: low-income, middle-income, and high-income. The variables consisted of general characteristics, dietary behavior, health status, health related behavior, and dietary intakes. Dietary data were estimated by the 24-hour dietary recall. Results: In men, the low-income group encompassed older, less educated, less employed, and living with family of first generation. However, in women, there were no differences in employment by the level of income, and women living alone had lower income than subjects living with family. Elderly men in the high-income group had a significantly higher level of nutrient intake (energy, protein, fat, phosphorous, riboflavin, niacin and vitamin C). Men in the low-income group consumed a significantly lower intake of fruits, seaweeds and eggs, including total food. Women in the low-income group had significantly less intake of protein, fat, calcium, phosphorous, iron, vitamin A, riboflavin, and niacin whereas women in the high-income group had significantly higher intake of sugar & sweet, eggs, and beverages, including total food. Conclusion: These results suggest that the level of household income is an important factor that influences food and nutrient intake in the Korean elderly. The socioeconomic status needs to be considered differently among elderly men and women when implementing food assistant programs and designing nutrition education programs.

• Korean Journal of Food Science and Technology
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• v.14 no.4
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• pp.375-381
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• 1982

The studies are conducted on the changes of soybean lipids in terms of physicochemical characteristics, lipid classess and fatty acid composition during the fermentation process of soybean Koji preparation for daenjang (soybean paste) in a model system using cooked soybean inoculated by Aspergillus oryzae. The total lipids contents were increased during soybean Koji preparation, generally iodine values decreased but acid values increased. Total lipids of soybean Koji consisted of about 90.6% neutral lipids, 7.6% phospholipids and 1.8%, glycolipids indicating that phospholipids contents of soybean Koji was increased when compared to those of cooked soybean. The major components of nonpolar lipids in soybean Koji were free fatty acids(39.6%) and triglycerids(29.2%). Free fatty acids increased as the triglycerides decreased during soybean Koji preparation by the hydrolysis of lipase action. The major components of polar lipids in soybean Koji were phosphatidyl choline and phosphatidyl ethanolamine. Differences were observed in the composition of the polar lipids of cooked soybean and soybean Koji. A little changes also occurred in fatty acid compositions of total lipids, triglycerides and free fatty acids fractions in soybean Koji preparation. Especially a considerable increase of linoleic acid in free fatty acid fraction was observed in soybean Koji.

• Journal of The Korean Society of Grassland and Forage Science
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• v.40 no.2
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• pp.111-116
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• 2020

This study was conducted to determine the maintenance energy requirements of growing goats in order to establish an appropriate energy benefit system, to reduce feed costs and improve livestock productivity of goat farmers, and to present basic data for detailed specifications afterwards. This experiment was conducted as a group specification test for a total of 3 months, with 32 goats of three months age and conducted by four treatments with different energy levels (T1: NRC+0%, T2: NRC+10%, T3: NRC+20%, and T4: NRC+30%). The average daily gain was the highest in the treated with NRC + 10% of the energy level of the experimental diet, and the feed conversion ratio was in the range of 6.3 g to 7.3 g in the group feeding experiment. Although there was no significant difference in digestibility between treatments, the digestibility of dry matter, crude protein, and crude fat was higher in T2 treated with NRC + 10% than the other treatments. Through the regression equation of the values of MEI and ADG obtained through the experiment (Y=0.5439X+111.51, R²=0.712), the maintenance energy requirement of the goat in the growing period was estimated to be 111.51 kcal/kgBW^0.75.

• Childhood Kidney Diseases
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• v.1 no.1
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• pp.4-12
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• 1997

Purpose: To evaluate the prevalence and clinical manifestations of various glomerulonephritis (GN) in children, a clinicopathological anlysis of 310 biopsied cases were performed. Method: We conducted retrospective study with review of histopathologic findings and clinical manifestations of the 310 cases diagnosed as glomerulonephritis by percutaneous renal biopsy which were done between January 1986 and December 1996 at department of pediatrics, Pusan Paik hospital. Results: 1) Male to female ratio was 1.54:1 and the range of age was from 13 months to 15 years 10 months. 2) Among these, 217 (70.0%) patients were belong to primary GN and 93 (30.0%) patients were belong to secondary GN. As a whole, the most common pathologic diagnosis was minimal change lesion (MC, 32.6%), which was followed by IgA nephropathy (IgAN, 15.8%), $Henoch-Sch\"{o}nlein$ purpura nephritis (HSPN, 13.5%), Poststreptococcal glomerulonephritis (PSAGN, 8.1%). 3) Clinical manifestations of patients were asymptomatic urinary abnormality (43.2%), nephrotic syndrome (41.0%), acute glomerulonephritis (14.2%), chronic glomerulonephritis (1.0%), rapidly progressive glomerulonephritis (0.6%). 4) In primary GN, the most common pathologic diagnosis was MC (46.5%), IgAN (22.6%), thin glomerular basement membrane (GBM) disease (7.8%), membranoproliferative glomerulonephritis (MPGN, 5.5%), mesangial proliferative glomerulonephritis (MesPGN,4.6%), focal segmental glomerulosclerosis (FSGS, 4.6%), membranous nephropathy (MN, 0.9%), sclerosing glomerulonephritis (SCGN, 0.9%), crescentic glomerulonephritis (CreGN, 0.5%) and non-specific glomerulonephritis (NonspGN, 6.0%). 5) Major causes of secondary GN were HSPN (45.2%), PSAGN (26.9%), hepatitis B associated glomerulonephritis (HBGN, 17.2%), lupus nephritis (LN, 6.5%), Alport syndrome (2.2%), hemolytic uremic syndrome (1.0%), fibrillary glomerulonephritis (1.0%) in descending order. Conclusions: There are some differences of the results of clinicopathological stuidies of glomerulonephritis in children because of its different indications of renal biopsy, pathologic classification of renal disease and methods of analysis among investigators. In order to establish more reliable data of incidence and classification of childhood glomerulonephritis in Korea, multicenter cooperative study were necessary.