• 농업기술회보
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• v.42 no.2 s.496
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• pp.46-52
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• 2005

제31회 의정부·양주농업기술자대회 개최/대구·경상북도연합회 회무위원회 열어/대구,정읍,원주 지방농민대학 개최로 영농기술향상 기여/2005년도 겨울농민 대학 6개과정 모두 마쳐/농산물 품질관리사 양성교육 실시/본회 권국원 감사 2005년도 신지식농업인으로 선정/부안 김보영 회우 우렁이농법에 의한 친환경인증 쌀 직거래 인기/전북연합회 노기욱 사무국장「한국양토양록조합 감사」피선/토종닭의 선도농가 장상처이사,항생제 불검출 품질인증 획득/진주지회 김형렬 지 회장 모친상/2005년 상반기 [우리농업 희망찾기] 정책공모/옥수수 보급종 신청 안내문/대산농촌문화상 수상후보자 추천/2005 북녘 못자리용 비닐 보내기 모금 운동/40년 역사의 자랑스런 농업기술회보!

• Proceedings of the KIPE Conference
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• 2011.11a
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• pp.155-156
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• 2011

겨울철 또는 온도가 낮은 지역에서는 선박과 건축용 등의 창유리에 결로, 결빙현상이 쉽게 발생하여 시야확보가 어렵다. 이 현상들은 창유리의 온도를 상승시킴으로써 방지가 가능하다. 하지만 창유리의 온도는 바람과 기온 및 기후 변화 등의 외란에 민감하므로 일정한 온도 유지가 어렵다. 따라서 민감한 창유리의 온도를 일정하게 유지하기 위한 제어기법이 필요하다. 본 연구에서는 산업현장에 많이 사용되고 있는 PI 제어 기법을 적용하여 4 [kW]급 발열유리 온도 제어 시스템의 제어기를 설계하고 실험을 통하여 제어기의 성능을 검증하였다.

• Journal of Korean Library and Information Science Society
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• v.38 no.1
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• pp.363-373
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• 2007

Sulwhaji(雪花紙, meaning "snow-white flower paper") had been originally manufactured before 16th century until after 19th century in Pyunggang, Korea, which represented the typical characteristics of traditional Korean paper. Since 17th century, however, it had been also made in Namwon, Sunchang, Jinju and so on. Its material was mulberry bark tree and was bleached beautifully white by using snow. It was highly qualified mainly used for painting, caligraphy, and book printing. That had been used in the Royal palace and as cherished gift for foreign envoys.

• The Korean Chronic Disease News
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• no.311
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• pp.1-18
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• 2006

경기도 평택시 송탄 보건소 김보섭 소장/만성질환 관리 중추적 단체 위상제고/“앞으로 국민연금 덜 받는다”/건강보험료 환급 사기‘주의’/전공의 보조수당 민간병원 확대/65세이상 60%에 월8만9천원 지급/“의료용 혈액이 부족하다”/남‘암’-여‘순환기’사망확률 높아/수면무호흡증, 남성 발기부전초래/독감백신 국내 생산기반 구축/정부 의약품 가격 정책‘위헌소송’/차별화 된 고품격 보건서비스 제공/보건소 의료기관 서비스 만족도‘1위’/초고령사회 대응, 본격 시동 걸었다/노인의료“의료적 접근 동반돼야”/겨울철 어르신 건강관리 수칙 발표/비영리 의료기관 M&A 근거 마련/병원 서비스산업 주요 육성방안/고령친화 모델지역 기본구상/

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.116-123
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• 2010

The Study of the Railway-saving electric water heaters to replace electric heaters when combined, Separate bathroom with hot water in winter, as coaches, without the need to warm up with hot water may be.To improve passenger service can tell. High-efficiency energy saving energy from furnace. Due to fuel cost savings and business improvements come true. Can prevent pollution.Heating the room next to railway vehicle utilization is expected to nopeulgeot.Is expected to expand gradually.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.1 no.3
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• pp.228-234
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• 1989

This paper describes the experimental thermal performance results of four experimental model buildings insulated differently. For the purpose of examining the thermal characteristics of external walls and indoor thermal conditions, four experimental model buildings are constructed as externally insulated, internally insulated, non-insulated &light-weight curtain wall types with different K-values and heat capacities, respectively.
Through the measurements of temperatures at various points and solar insolation, the effects of insulation and heat capacities are evaluated, and the evaluated effects of each experimental model buildings are compared. Hence, the characteristics of temperature profiles, time-lag effects and decrement factors are discovered.

• Journal of Korean Society of Forest Science
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• v.88 no.4
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• pp.523-532
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• 1999

The studies were carried out to develop an urban forest aromatic bath in the idle space within city area for handicapped persons, patients and city workers, who having less chance to visit the natural forest aromatic bath. The environmental conditions were checked in the experimental double vinyl house where native and exotic aromatic woody and herbaceous plants were growing with minimum energy input in the periods of mid-winter and mid-summer. The growth and photoperiodic responses of the plants to the low and high temperatures were observed during winter and summer respectively. The most of herbaceous plants in the double vinyl house with the controlled minimum night temperature of $-2^{\circ}C$ had no winter injury but did not grow and started the growth in April. The exotic herbs such as Catnip faassen's(Nepeta x faassenia) and Lemon bergamot(Monarda citriodora) grew better in the longer photoperiodic conditions. The growth rates of Abies koreana, Thuja koraiensis and Pinus sylvestriformis in the early spring were affected mainly by the night minimum temperature and less affected by the photoperiodic conditions during winter. The native aromatic herbs such as Robdosia japonica, Molsa punctulata, Agastache rugosa and Codonopsis lanceolata showed stimulatory growth at the 16 hours day-length in case of the high temperature vinyl hose. The height and root collar diameter growth of pine seedlings were inhibited in maxim temperatures over $40^{\circ}C$ during summer.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.4
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• pp.15-20
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• 2017

Currently, residential air conditioners operate as a heat pump during winter. In this case, the outdoor heat exchanger acts as an evaporator obtaining heat from cold air. On the other hand, it acts as a condenser during summer transferring heat to hot air. The outdoor temperature changes significantly from high to low. Generally, the air-side j and f factors are obtained at a standard outdoor temperature. Therefore, the applicability of the j and f factors under different outdoor conditions needs to be checked. In this study, tests were conducted for a two-row louver finned heat exchanger changing the outdoor temperature to subzero. The effects of the tube-side brine flow rate were also checked. The results showed that air-side j and f factors were essentially constant and independent of the outdoor temperature, suggesting that an extension of j and f factors obtained under standard conditions to a low outdoor temperature is acceptable. All j and f factors agreed within 9% and 3%, respectively. Tests were also conducted by changing the coolant flow rate. Both the j and f factors did not change according to the flow rate, suggesting that the tube-side heat transfer correlation is acceptable.

• Korean Journal of Environmental Agriculture
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• v.14 no.2
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• pp.232-245
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• 1995

The garbage from the dwelling house was composted in two kinds of small composter in the laboratory, and the possibility of garbage composting was examined. The composters were general small. One (type 3) was constructed with the double layer walls and the other (type 4) was the same as the first except for being insulated. Because it was found that type 3 was not available for composting under our meteorological conditions through the winter experiment, only type 4 was tested in spring and summer. The experiment was performed for 8 weeks in each season. The seasonal variation of several components in the compost was evaluated and discussed. The results summarized below were those obtained at the end of the experiment, if the time was not specified. 1) The maximum temperature was $43^{\circ}C$ in winter, $55^{\circ}C$ in spring and $56^{\circ}C$ in summer. 2) The mass was reduced to an average of 63% and the volume reduction was an average of 78%. 3) The density was estimated as 1.5 kg/l in winter and 0.8 kg/l in spring and summer. 4) The water content was not much changed during the composting periods. It was 79.3% in winter, 75.0% in spring and 70.0% in summer. 5) After pH value increased during the first week, it decreased until the second week and increased again continuously thereafter. It reached pH 6.19 in winter, pH 7.59 in spring and pH 8.69 in summer. 6) The faster the organic matter was decomposed, the greater the ash content increased. The contents of cellulose and lignin increased, but that of hemicellulose decreased during the composting period. 7) Nitrogen contents were in the range of 3.3-6.8% and especially high in summer. After ammonium contents increased at the early stage of the composting period, they decreased. The maximum ammonium-nitrogen content was 2,404mg/kg after 8 weeks in winter, 12,400mg/kg after 3 weeks in spring and 20,718mg/kg after 3 weeks in summer. C/N-ratios decreased with the lapse of composting time, but they were not much changed. Nitrification occurred actively in summer. 8) The contents of volatile and higher fatty acids increased at the early stage of composting and reduced after that. The maximum content of total fatty acid was 9.7% after 6 weeks in winter, 14.8% after 6 weeks in spring and 15.8% after 2 weeks in summer. 9) The contents of inorganic components were not accumulated as composting proceeded. They were in the range of 0.9-4.4% $P_2O_5$, 1.6-2.4% $K_2O$, 2.2-5.4% CaO and 0.30-0.61% MgO. 10) CN and heavy metal contents did not show any tendency. They were in the range of 0.21-14.55mg/kg CN, 11-166mg/kg Zn, 5-65mg/kg Cu, 0.5-10.8mg/kg Cd, 6- 35mg/kg Pb, ND-33 mg/kg Cr and ND-302.04 g/kg Hg.

• Journal of Animal Environmental Science
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• v.16 no.3
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• pp.193-204
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• 2010

The goal of this study was to develop a high-rise hog building(HRHB) for growing-fattening stages. HRHB was two story building and was suitable for specific environment in Korea. Manure was treated in a first floor and pigs were raised on the slatted second floor. Three ventilation systems - 1) duct inlet to wall exhaust system(V1), 2) eave inlet to wall exhaust system(V2), and 3) ceiling inlet to wall exhaust system(V3) - were used. This experiment was conducted during winter and from summer to fall. Air temperature, air speed, ammonia, hydrogen sulfide in HRHB, and swine growth rate were measured. During winter, air temperature in V1 system tended to be slightly high without any effect of outside air temperature. Maximum temperature from summer to fall was between 33.4 and $33.8^{\circ}C$ and there was no significant difference among systems. Continuously measured daily temperature was lower in V2 system than other systems and the fluctuation of air temperature was high. Air speed in V1 and V2 systems were similar (0.02~0.21 m/s), and was 0.04~0.15 m/s in V3 during winter. From summer to fall, air speed in V1, V2, and V3 systems were 0.10~0.41 m/s, 0.10~0.83 m/s, and 0.11~0.26 m/s, respectively. V2 system showed bigger fluctuation of air speed than other systems. During winter, the highest concentrations of ammonia in V1, V2, and V3 systems were 7.0, 3.5, and 8.7 ppm, respectively. Hydrogen sulfide was not detected. The highest concentrations of ammonia from summer to winter in V1, V2, and V3 systems were 6.1, 2.8, and 5.6 ppm, respectively. Swine growth showed no statistical significance among systems. However, daily weight gain was approximately 4% higher in V1 and V3 than in V2. Feed intake/daily weight gain was approximately 4% higher in V1 than other systems. From summer to fall, daily weight gain in V1 and V3 tended to approximately 3% higher than other systems, and feed intake/daily weight gain was approximately 2% higher in V1 than other systems. Hence, V2 system for the ventilation system of HRHB should not be utilized.