전기 방열기가 국화재배온실의 난방에 미치는 영향

서원명 ( Won Myung Suh ),임재운 ( Jae Woon Leem ),김영주 ( Young Ju Kim ),민영봉 ( Young Bong Min ),김현태 ( Hyeon Tae Kim ),허무룡 ( Moo Ryong Huh ),윤용철 ( Yong Cheol Yoon ) 경상대학교 농업생명과학연구원(구 경상대학교 농업자원이용연구소) 2010 농업생명과학연구 Vol.44 No.4

경상대학교 교내에 설치되어 있는 1-2W형 온실을 대상으로 전기 방열기를 이용하여 국화 재배온실의 난방효과를 검토한 결과는 다음과 같다. 실험기간동안 최고, 평균 및 최저 외기온은 각각 -3.8~21.3℃, -5.2~16.1℃ 및 -12.5~14.4℃ 정도의 범위로 나타났으며, 온실 내외의 평균상대습도 각각 43.5~98.6% 및 35.2~100%로 나타났다. 12월 중순부터 2월 상순까지 최저 외기온은 대략 -5.0~-10.0℃ 전후로 나타나 진주기상대의 최근 자료와 비교하면 상대적으로 최저기온이 낮게 나타나는 경향이 있었다. 야간의 경우, 방열기 직하부의 엽온이 방열기 중간 지점에서 측정한 엽온 보다 크게 2~3℃정도 높게 나타나거나 또는 미미하지만 약간 높게 나타나는 경향이 있었다. 근권부의 경우, 직하부나 중간 지점에서의 온도 차이는 거의 없는 것으로 나타났고, 근권부의 최고온도와 기타 최고 온도의 발생 시점을 보면, 약 2시간정도의 지체현상이 있음을 알 수 있었다. 그리고 실험기간동안 난방에 소요된 총 소비전력량, 공급에너지 및 총 난방비는 각각 2,800kWh, 2,408,000kcal 및 112,000won 정도였다. 화석연료인 경유로 난방할 경우, 총 난방비는 224,500won 정도였다. 방열기를 이용하여 난방할 경우, 난방비를 약 50% 정도 줄일 수 있을 것으로 판단되었다. An analysis in heating effects of an electric radiator located in a 1-2W type chrysanthemum (3 cultivars) cultivation greenhouse installed in Gyeongsang National University drew the following conclusions. During the experiment period, the highest, average, and the lowest outside temperatures were in the ranges of -3.8~21.3℃, -5.2~16.1℃ and -12.5~14.4℃, respectively, and the average relative humidity inside and outside the greenhouses were in the ranges of 43.5~98.6% and 35.2~100%, respectively. From mid-December to early February, the lowest outside temperature was recorded as approximately -5.0~-10.0℃, which showed that it tended to be relatively lower than the temperatures recorded at the Jinju Meteorological Observatory. During the night, the leaf temperature measured directly under the radiator tended to be higher by 2~3℃ than that those at the middle point of the radiator, or higher by anegligible amount. In the case of root zone temperature, it was found that there was almost no difference between temperatures of the part directly under and the middle point, and the time when the highest temperature of root zone and other highest temperatures took place showed that there was about a 2-hour delay phenomenon. The total electricity consumption, energy supply and total heating cost during the experiment period were 2,800 kWh, 2,408,000 kcal and 112,000 won, respectively. When diesel, a kind of fossil fuel, was used as heating oil, the total heating cost was around 224,500 won. It was estimated that the total heating cost could be reduced by around 50% if a radiator was used.

구강균에 대한 각종 한약제의 증식 억제

정영건,지원대,김성영,곽동주,서수교,백경연 한국위생과학회 1997 한국위생과학회지 Vol.3 No.1

The effect of oriental medicines an the growth of oral bacteria(B. pumilus JU4, B. coagulans JU6, B. subtilis var globigii JU7 and B. subtilis var. globigii JU9) which were isolated from teeth, gums and tongues of patients was investigated. lt was shown that the water extracts of Glycyrrhiza glabra L. var. glandulifera Regel et Zucc., Schizandrae Fructus and Coptidis Rhizoma have the strong antimicrobial activity against every test organism. Especially, the water extract of Schizandrae Fructus has the most antimicrobial activity against all test bacteria of which MIC were the same as 0.25%. The growth of oral bacteria B. pumilus JU4 was inhibited by addition of the water extracts of Glycyrrhizae Radix, Schizandrae Fructus and Coptidis Rhizoma in the concentration of 0.9%, 0.2% and 0.1% respectively. It was tested that specific growth rates of B. pumilus JU4 in each concentration of the water extracts of Glycyrrhizae Radix, Schizandrae Fructus and Coptidis Rhizoma. From the results, the test showed that mean of specific growth rates of B. pumilus JU4 decreased 102%, 186% and 210% in 3% concentration of the water extracts of Glycyrrhizae Radix, Schizandrae Fructus and Coptidis Rhizoma more than those in control respectively.

타타늄의 열처리 조건에 따른 동전위 양극분극특성 및 표면 미세구조 변화

주동현,이용렬,정영화,양홍서,박상원,이도재,송호준,박영준 大韓齒科器材學會 2002 대한치과재료학회지 Vol.29 No.2

The corrosion resistance of metallic implants is essential for successful implant osseointegration. Moreover, the implant surface should have appropriate surface roughness for the attachment of the osteoblast and collagen fibrils. When titanium is exposed to air a thermodynamically very stable oxide film is formed at once. This oxide is very thin and yet it protects the metal from corrosion instantaneously. However, the oxide would not be ideal, and it would be supposed that the state of oxide film would be various by the different conditions when it is formed. The objective of this study was to evaluate the electrochemical properties and surface microstructural changes of titanium after passivation treatment or exposure to high heat (in vacuum or in air). ASTM grade 2 commercially pure titanium (Ti) disks of 10㎜ diameter were wet ground and polished with 240 and 600 grit SiC, and then ultrasonically cleaned with distilled water and ethanol. Cleansed as-received samples (As-R group) were passivated with 30% nitric acid solution at 50℃ for 15 minutes to make the Pas group. The Std-V samples were made by treating the Ti disks in vacuum quartz tube (10^-8 Torr) at 530℃ for 40 min for stress relieving, followed by annealing at 700℃ for 90 min, and then slow cooling to room temperature. The Std-A samples undergo identical procedure as the Std-V group except that it is done in air. For 530℃-V samples, Ti disks were heated at 530℃ for 40 minutes and slow cooled to room temperature. The 1000℃-V samples were produced by heating Std-V specimens again at 1000℃ for 2 hr, followed by cooling to room temperature. 530℃-A and 1000℃-A samples were also prepared. Potentiodynamic anodic polarization measurement, SEM, AFM and XRD analysis were performed to evaluate the effects of the various treatments. The difference in the mean values of E_corr between groups showed statistically significant difference (P<0.05), but that of I_corr did not show significance (P>0.05). When Ti surface was passivated there was a shift of corrosion potential (E_corr) in the noble direction and a lower corrosion current density (I_corr) value. Std-A samples showed most noble E_corr value among the tested groups. 530℃-V samples showed more noble E-corr than other tested groups except Std-A group. 1000℃-V samples showed more noble E-corr than those of Std-V sample. In the case of Std-, 530℃- and 1000℃-groups, -A sub-groups showed better corrosion resistant characteristics than -V sub-groups in regard to E-corr and I_corr values. In the SEM observations, the surfaces of the As-R samples showed only scratch line on smooth surface. In Pas samples, thick oxide layer covered the surface under high magnification observation. 530℃-A samples were covered by oxide granules, and Std-A samples had 25~50 nm-thick acicular oxides. The 1000℃-A samples were covered by coarse oxide crystals with a granule diameter of 0.1~0.6 μm having a gross appearance of milky white color, which was identified by XRD as a rutile. On the other hand, 1000℃-V samples showed an Widmansta¨tten structrue of which the orientation of the lattice is formed along crystallographic planes of the parent crystals. On the AFM observation, 530℃-A samples showed RMS roughness of 79.38 nm which is 5 times rougher than those of the As-R samples. Std-A sample had a roughness of 330.47 nm which is about 20-times rougher than that of the As-R sample. 1000℃-A samples were covered by coarse granular oxides and the roughness were about 0.56 μm. Vacuum sub-group samples showed a more smooth surface than air sub-group samples, and the oxide film was more dense. Due to variability of the surface treatment and heat treatment conditions, the process of the oxide formation seems to be affected thereby making the corrosion properties and surface micro-morphology different. However, more various electrochemical analysis together with surface analysis, and an investigation for the effects of those on the osteoblast cell adhesion and calcium phosphate apposition are needed for the improvement of the osseointegration rates of the titanium implants.

간경변 환자에서 Oro-cecal Transit Time의 측정

원경준,이준,변유미,조민근,조주연,서정균,김영대,박찬국,김만우 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.2

Background: Neurotransmitter like substances in the gut have been proposed to contribute to the overall portal systemic encephalopathy (PSE). The source of the ammonia in patients with PSE is mainly the small bowel, as a result of the conversion of glutamine in the diet to glutamate and ammonia. PSE is highly responsive to changes in diet, to antibiotic therapy and to ingestion of nondigestible disaccharides such as lactulose. This study was performed to evaluate the relationship between PSE and oro-cecal transit time. In addition, performed to evaluate the effect of severity, cause, complications of liver cirrhosis on oro-cecal transit time. Methods: Between August 2006 and February 2007, 48 cirrhotic patients consecutively was enrolled in study their oro-cecal transit time after informed consent was obtained. A non-invasive hydrogen breath test was used to study oro-cecal transit time (OCTT). Result: The OCTT were delayed in cirrhotic patients with PSE compared without PSE (123.3 ± 42.7 min vs 170.0 ± 58.3 min, p<0.05). OCTT tended to prolongate further as the damage in the liver got worse, nevertheless the result was statistically meaningless (p<0.111). Neither presence of ascites or cause of PSE had any influence on gastrointestinal transit. Conclusions: Cirrhotic patients with PSE have more delayed OCTT than without PSE. Further research is needed to find out the relationship between OCTT and severity of liver cirrhosis.

이트리아 첨가 붕규산염 유리로 제조한 알루미나-유리 복합체의 파괴인성 평가

원대희,이민호,박주미,배태성,진영철 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.2

The study was performed to evaluate the fracture toughness of dental alumina-glass. Alumina compacts were prepared by press 150㎏/㎠ and sintering at 1100℃ for 2hrs. Dense composites were made by infiltrating partially sintered alumina with four different borosilicate glasses containing 1, 3, 6, 9 mol% Yttria(Y₂O₃) at 1200℃ for 6hrs. Apparent porosity was measured by the KS L 3114 principle method. Fracture toughness values were about ∼4.72 MPa·m½. Porosity rates of alumina-glass composites were about 0.2%. The fracture surface of the alumina-glass composites showed a Palmqvist crack pattern at the fracture origin and indicated a tendency by the frictional interlocking between the microstructurally rough fracture surfaces.

운동유형이 비만 남성의 건강관련체력과 신체둘레변화에 미치는 영향

원영두,조완주 朝鮮大學校 스포츠科學硏究所 2006 스포츠科學硏究 Vol.17 No.-

This study examined Influences on the changes from Health Related Physical Fitness and body circumference in the obese Men according to Exercise Types. It selected 30 men in their twenties having over 30% of body fat. residing in G metropolitan city and divided them into 10 in aerobic exercise group, 10 in anaeiobic exercise group and 10 in aerobic and anaerobic exercise group and conducted 12-weeks training by exercise types. It obtained the following conclusions. 1. Aerobic exercise group in the changes of body composition by exercise types showed statistically significant differences in weight and body fat as the level of p<.001 and anaerobic exercise group had statistically significant difference as the level of p<.01. Aerobic and anaerobic exercise groups showed statistically significant differences as the level of p<.001. 2. Aerobic exercise group in the changes of health-related Physical Fitness by exercise types showed statistically significant differences in flexibility and cardiopulmonary endurance as the level of p<.OO1 and anaerobic exercise group had statistically significant difference in muscular strength as the level of p<.05 and in flexibility as p<.01. Aerobic and anaerobic exercise groups showed statistically significant differences in flexibility and cardiopulmonary endurance as the level of p<.01. 3. Aerobic exercise group in the changes of girth of physical parts by exercise types showed statistically significant differences in girth of chest as the level of p<.001 and in girth of waist, hip and thigh as the level of p<.01 and anaerobic exercise group had statistically significant difference in girth of thigh as the level of p<.01. Aerobic and anaerobic exercise groups showed statisticallv significant differences in girth of waist as the level of p<.05 and in that of thigh as the level p<.01

백서 대뇌피질절편에서 산소 및 포도당 결핍에 의한 [³H]Acetylcholine의 유리에 관한 연구

이정주,김기원,서만욱,김영현,김기원 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

남서울대학교 교직교육과정 개편 방안

허영주,김원곤,전창석,이석열 남서울대학교 2009 남서울대학교 논문집 Vol.15 No.1

The purpose of this study is to search for method that Teacher's curriculum of Namseoul University is been active. For success of this purpose, we analyze strengthening on Teacher's education of Ministry of Education & Science, and analyze Kindergarten and Middle & High School's curriculum. And we examined the present managerial conditionand the problem of Teacher's curriculum in this university. Also analyze curriculum, support system and existing facilities of other universities.According of this analysis, for acting of Teacher's curriculum through the enlargement of advance into the teaching profession, we found alternate Teacher's curriculum. Key Words : alternate, Teacher's curriculum, teaching profession, survey

직장남성의 연령 및 비만별 체력비교

원영두,송채훈,조완주 朝鮮大學校 스포츠科學硏究所 2004 스포츠科學硏究 Vol.15 No.-

This study examines the physical fitness of each factor needed by working men, seeks to improve their physical strength by age and the degree of obesity, prevent several diseases due to the lack of exercise in advance, improve their service efficiency, enjoy efficient leisure activities and develop exercise programs for diagnosing physical strength and improving health. It calculated the mean and standard deviation by age and obesity (BMI) using statistical program SPSS 11.0 with 702 working men and obtained the following conclusions from post-test using one-way ANOVA and scheffe for differential test of the mean between groups. 1. In compahson of physical fitness factors by age, the group below 29 years old showed higher physical fitness level than other age groups in muscular strength, muscular endurance, flexibility, equilibrium, agility, power, whole body reaction and cardiopulmonary endurance and in comparison between groups by age, there was statistically significant difference at all physical fitness factors as p<.001. 2. In comparison of physical fitness factors by obesity, underweight group showed higher physical fitness level at muscular endurance, agility, equilibrium and flexibility factors, normal weight group showed higher physical fitness at power and whole body reaction factors and obesity group showed higher physical fitness at muscular strength factor. In addition, as a result of comparing physical fitness factors among groups by obesity, there was statistically significant difference at muscular strength, agility, Power, flexibility and cardiopulmonary factors as p<-05.

보건소 건강증진사업 수행과정의 질 평가

서영준,정애숙,박태선,김주경,박남수,이희원 韓國保健敎育.健康增進學會 2003 보건교육건강증진학회지 Vol.20 No.1

This study purports to assess the process quality of health promotion programs at public health centers. The sample used in this study consisted of 242 public health centers in South Korea. Data was collected with self-administered questionnaires between September. 3rd to September. 23rd in 2002. The 95 returned questionnaires were analyzed by SPSS 11.0 version. The major findings are as follows; There is a need to improve (1) a procedure for reviewing and analyzing strategic planning, (2) the quality of the staff in charge of program management, (3) the function of planning and training for monitoring and evaluation, (4) the ability of program managers in advising and consulting with clients, and (5) a procedure for organizing resources and information. In conclusion, in order to improve the process quality of health promotion programs at public health centers, integrated support from various institutions such as public health centers, community, regional and national health authorities and administrative departments is required.