• Korean Journal of Soil Science and Fertilizer
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• v.9 no.3
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• pp.149-163
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• 1976

In Korea, the ever-increasing population has become a serious problem and the decreasing of cultivated lard area per person has become a major concern. Therefore, today we are implementing a green revolution using miracle varieties which require more fertilizer. The increased use of fertilizer along with development and adoption of high yielding varieties is the key to carrying out this green revolution. Fertilizer consumption in Korea is mainly influenced by agricultural techniques, fertilizer prices and government policies for increasing food production. If there are no special change, such as a cataclysm or an exhaustion of resources, it is quite clear that the fertilizer demand will increase to the near maximum ceiling point of optimum levels for crops in the year 2000. Fertilizer demand is not the amount of fertilizer that will be used by the farmer, but the actual optimum amount of plant nutrients required for maximum production. In this report, two alternative strategies are consideded in forecasting the future feitilizer demands. Alternative I is projected by reviewing consumption amounts over the last 10 years (1966~75) in Korea. The annual rate of increase in fertilizer consumption for the last 10 years was approximately 8.7% (table 1). Plant nutrient consumption rates in later years have been more balanced, and also fertilizer consumption per total acreage is considerably higher in Korea than in other countries (table 11), consequently the rate of increase in the future is expected to decline. Looking at the long term projections, the average annual rate of increase is expected to be 7% for 1976~80, 2.5% for 1981~90, 1.5% for 1991~2000. Thus, total projected fertilizer demands are estimated at 1,208,000M/T by 1980, 1,547,000M/T by 1990, 1,795,000M/T by 2000 (table 16). Alternative II is based on projected optimum fertilizer levels for crops and on increased crop acreage. The government recommended fertilizer rate has increased by a factor of 0.99 to 5.49 over the past twelve years depending on the specific crops (table 4). Levels of fertilizer demand recommended by government (table 7) in 1976 are still low compared with actual optimum fertilizer demands for crops (table 5). Therefore, future incaeases in fertilizer usage are anticipated. Thus, total projected fertilizer demands are estimated at 1,229,000M/T by 1980, 1,493,000M/T by 1990 and 1,898,000M/T by 2000(table 16).

• Journal of Korean Ophthalmic Optics Society
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• v.20 no.2
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• pp.229-235
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• 2015

Purpose: This study was undertaken to study on visual function before and after prescription of vertical prism. Methods: 80 subjects (10-30ages) who had been precribed vertical prism and 1 year after they were represcribed vertical prism. Results: Phoria (p=0.000), supra vergence (p=0.000), NPC (p=0.003), NPA (right eye) (p=0.005), NPA(left eye) (p=0.000) showed a significant change. Conclusion: Vertical prism prescription was reduced during revisit. Supra vergence, NPC, NPA(right eye), NPA(left eye) showed a significant change. Binocular Accommodative lag was not associated with vertical prism prescription and binocular vision findings.

• Journal of Korean Society of Forest Science
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• v.94 no.1 s.158
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• pp.21-25
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• 2005

In order to prevent the pine mushrooms, Tricholoma matsutake, from being damaged by the pine needle gall midges, Thecodiplosis japonensis, and thereby, to increase their production and improve their quality, a sprinkler system was installed on the mushroom field. A low-concentration insecticide (deltamethrin 1% EC, x2,000) was sprayed once at insects' most active time every day during the period of insects' adult occurrence and thereafter, the irrigation by ground water spraying was periodically enforced. Such a test was conducted at Yangyang-Gun, Kwangwon-do, Korea for 2 years from 2000 through 2001. The pine needle gall midges generally emerged for about 40 days from late May to early July. 50% emergence of them was about June 6, and peak emergence (more than 80%) was early or mid-June. Gall formation rate was 3.5% on average with this ground insecticide spraying, while 51.3% when not treated. Control effectiveness of this insecticide spraying was 92.3%, which was higher than 82.5% by the conventional injection of insecticide into tree stems. Pine mushrooms emerged for about 35 days from mid-September through earlier October, and around 80% of them did for about 15 days from late September through early October. As a result of the periodic ground water-spraying (30 mm per week) for 2 months (from August to October), the production of mushrooms increased by 74.3% (110% in terms of weight), with their quality improvement. The mushrooms produced from the treated stand by the spraying system were priced 8,670,000 wons per hectare, and thus, the net income deducting the facility and management cost was 4,310,000 wons, about 5% higher than value from the control stand. It was analyzed that this treatment was significantly cost effective when the facilities are used more than 5 years.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.195-197
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• 2009

본 연구는 산부인과 내원환자에 대한 미래경영 예측하고자 한 대학병원 의무기록정보통계를 활용하여 외래환자, 입원환자 및 분만관련 자료를 분석한 결과 다음과 같다. 신환환자의 경우 평균 140.9명이었며, 각 연도가 증가함에 따라 유의하게 감소하는 경향을 보였으며(p=0.000), 최초년도(2001)에 212.6명이던 것이 최종년도(2007)에는 80.9명으로 약 140여명의 환자가 감소하였다. 입원 실인원의 경우 평균 124.6명이었며, 각 연도가 증가함에 따라 유의하게 감소하는 경향을 보였으며(p=0.000), 최초년도(2001)에 144.6명이던 것이 최종년도(2007)에는 104.8명으로 약 40여명의 환자가 감소하였다. 입원 환자 특성 및 분만관련 요인 등의 변수를 독립변수로, 입원환자수를 종속변수로 하여 다중회귀분석을 실시하였다. 그 결과, 입원환자수에 영향을 미치는 요인으로는 신환, 연인원 분만수 등이 선정되었으며 이들의 설명력은 62.8%이었다. 이상과 같은 결과 병원은 마케팅보다 환자관리라는 서비스가 우선되어야 하지만 환자 유인 효과도 현재 무시할 수 없으며 이는 환자의 병에 대해 관심을 써주는 병원의 배려가 신뢰로 연결될 수 있을 것이다.

• Neonatal Medicine
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• v.16 no.1
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• pp.25-35
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• 2009

Purpose: The characteristics of hospitalized patients in neonatal intensive care units (NICUs), including hospitalization costs (HC) and National Health Insurance (NHI) status were studied. Methods: We gathered the following data from 7 hospitals in Korea during 2006: the distribution of patients according to birth weight (BW), and the duration of the hospital stay according to BW and He. Results: The patients who were admitted to the NICU consisted of high-risk neonates, including low birth weight or premature neonates, which comprised 50% of all neonates admitted to the NICU. The duration of hospitalization was 75-90 days for neonates with BW <1,000 g, 45-60 days for neonates with BW between 1,000 and 1,499 g, and approximately 15 days for neonates with BW between 2,000 and 2,499 g. The portion of the HC covered by the NHI was 77.1%, 22.9% of the total HC was not covered by the NHI (19.5% was included in the list, but not covered by the NHI and 3.4% was not listed, but covered by the NHI). The average total HC per person was 4,360,000 won, and the HC covered and not covered by the NHI were 3,677,000 won and 1,007,000 won, respectively. The mean HC were as follows; 35,000,000 won for a BW <500 g, 18,000,000 won for a BW between 500 and 999 g, 16,000,000 won for a BW between 1,000 and 1,499 g, and 4,200,000 won for a BW between 1,500 and 1,999 g. Conclusion: Not only premature, but also ill neonates were under the care of the NICU. The HC increased as the BW decreased and the hospitalization period increased. The proportion of the patient's financial burden is >25% of the total He. For this matter, additional NHI is needed.

• Asian Journal of Turfgrass Science
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• v.18 no.4
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• pp.179-191
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• 2004

This study was conducted to find out the effect of sodding and seeding time and rate of seed mixtures on the establishment of cool-season turfgrasses by evaluating the turf coverage rates for two years. In fall planting, the required establishment period of full coverage($100\%$) was 1.5 months with a rolled turf sodding(Kentucky bluegrass $100\%$, Kentucky bluegrass $80\%$+perennial ryegrass $20\%$). The $100\%$ turf establishment was achieved in 7 months with Perennial ryegrass $100\%$, and 7.5 months by seeding with Kentucky bluegrass $100\%$(KB 100), Kentucky bluegrass $80\%$+perennial ryegrass $20\%$(KB80+PR20), Kentucky bluegrass $70\%$+perennial ryegrass $30\%$(KB70+PR30). In spring planting, the establishment periods far sod with KB 100 or KB80+PR20 were taken one month. However, in the case of seeding, the establishment periods were 3 months, 3.5 months, 3.5 months and 4 months with PR100, KB80+PR20, KB70+PR30, and KB 100, respectively Comparing the turf establishment vigor between fall and spring planting, the vigor was higher In spring planting than in fall planting in both sodding and . seeding. In the case of spring planting, the most proper time for turf establishment was tested on April, May, and June trials. The effect was significant in establishment vigor. The result showed highest on April planting. On May and June trials, establishment vigors were decreased gradually As the mixture rate of PR increased, ryegrass, establishment vigor was decreased with the rates. These results indicated that perennial ryegrass has relatively less tolerant to summer heat than Kentucky bluegrass. Number of shoots in 95 days after seeding was higher in KB100 by 16,600 per $m^2$ than in PR100 by 12,400 per $m^2$, while the lowest number showed in KB50+PR50 by 3,300 per $m^2$. Those in KB80:PR20, KB70:PR30 were 6,700 and 4,900 per $m^2$, respectively. The ratios of tillers according to mixture rates between Kentucky bluegrass and perennial ryegrass were KB80:PR20=87:13, KB70:PR30=78:22, and KB50:PR50=48:52. According to results in this study, Ideal seeding time might be spring (April) than in fall (September), and proper mixture rate was $80\%$ of Kentucky bluegrass with $20\%$ of perennial ryegrass.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.10
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• pp.2959-2965
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• 2009

This research is based on the medical information record of a university hospital on analysis of outpatients, inpatients and delivery related information in gynecology area. The result of application having analysis of patients as basic material for hospital management is as follows. The number of new patients in average was 140.9, and as the year passes by, it seemed to decrease noticeably(p=0.000). In the first year (2001) the number was only 212.6, but increased to 140 by the year of 2007, showing increase of 80.9. The actual number of patients in the hospital was 124.6 in average and it showed noticeable decrease after each year (p=0.000), from 144.6 patients on the first year 2001, to 104.8 patients in 2007, showing approximately 40 patients decreased. Multiple regression analysis was performed having independent variables as characteristics of patients and cause of delivery related factors, and dependent variables as the number of patients in the hospital. According to analysis, the cause of affecting the number of patients in the hospital was selected as the number of new patients, the number of delivery per year. The reliability rate was recorded as 62.8%. Therefore, apart from the services on marketing and patient management which must come first, the effect of inviting them cannot be avoided, which directly links to trust resulting from the consideration to patients.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.442-442
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• 2023

IEA에 따르면 2040년까지 4,000GW이상의 신재생에너지 신규 설비 증설이 이루어져 2040년에는 전체 발전 용량의 46%를 신재생에너지가 차지할 것으로 전망되며, BNEF는 2040년까지 10.2조달러 규모의 전 세계 발전 부문 투자 가운데 7.4조 달러가 신재생에너지에 집중될 것으로 전망하고 있다. 반면 국내 신재생에너지 시장은 규모와 내용면에서 세계 시장과 큰 격차를 보이고 있다. 2016년 기준 신재생에너지 설비 용량은 약 13.8GW이며, 정부의 재생에너지 보급 목표량은 2034년 기준 80.8GW로 매우 협소한 시장이 될 것으로 보인다. 이에 본 연구에서는 국내 신재생에너지 기업들의 해외시장 진출을 위해 지리적·기술적 관점에서 투자 가능성이 높은 인도네시아 재생에너지 시장, 특히 수상태양광 시장의 현황 및 전망에 관하여 검토, 제시하고자 한다.

• The Journal of the Korea Contents Association
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• v.14 no.2
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• pp.283-293
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• 2014

The purpose of this study is to understand baby boomers' perception of and preparation for later life by analyzing essays from 80,000 hours design competition. The researchers were able to access to 62 baby boomers' essays and used thematic analysis. The results showed that the competition enabled participants to re-conceptualize the meaning of preparation for later life. Three characteristics were derived in the participants' designing their future: 1) life focused on themselves, 2) life in which work, relationship, and leisure are balanced, 3) community life which take social responsibility. All the participants stressed health and learning as key factors in preparing for later life. They also showed almost obsessiveness toward their own effort to be diligent in order to achieve their idealistic later life. Based on the findings, practical implications for preparation for later life among baby boomers are discussed.

• Journal of The Korean Society of Grassland and Forage Science
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• v.22 no.1
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• pp.23-30
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• 2002

Eveuadies 71' kenaf (Hibiscus cannabinus L.) was grown at five plant densities (1, 2, 3, 4, and 5 plants per hill; 16,000, 32,000, 48,000, 64,000 and 80,000 plants/10a) from April 13 to October 8, 2001 in Jeju island to determine influence of plant number per hill on agronomic characteristics, forage yield and quality. As plant density increased from 1 to 5 plants per hill, the plant height averaged across two harvests increased 176 to 185 cm. Compared with the plant density of two plants per hill, the plant height decreased at higher plant densities (183, 180, and 166 cm for 3, 4 and 5 plants per hill). The highest yield of fresh forage (114.6 MT/ha), dry matter (17.3 MT/ha), crude protein (2.33 MT/ha), and total digestible nutrients (TDN) (9.21 MT/ha) was obtained at 2 plants per hill. As plant density increased from 1 to 5 plants per hill, crude protein, ether extract, nitrogen free extract, and TDN contents increased from 13.1 to 15.4%, 3.0 to 3.7%, 20.1 to 23.2% and 41.1 to 45.4%, respectively, while crude fiber and crude ash contents decreased from 41.2 to 34.9% and 9.4 to 8.2%, respectively.