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        검색결과 24

        1.
        2023.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 육군의 직무보수교육 기관 중 하나인 육군대학의 리더십 교육에 역량기반 교육과정을 적용 하기 위한 교육요구도를 조사할 목적으로 수행하였다. 연구자는 육군 영관장교의 리더십 역량을 도출하 기 위해 먼저 군 리더십에 관한 문헌 11편을 분석하여 22개의 리더십 역량 풀을 도출하였다. 이후 국방대 학교 리더십 전공 석‧박사과정 학생장교 11명을 대상으로 초점집단면접(FGI)을 실시하여 10개의 리더십 잠정역량을 도출하고, 역량별 정의와 하위요소를 구체화하였다. 군 리더십 교수/교관 11명을 대상으로 3차례에 걸친 전문가 델파이조사를 통해 영관장교의 리더십 핵심역량을 확정하였다. 이는 책임감, 회복탄 력성, 창의력, 군사지식, 지적수용력, 상황판단/결심, 솔선수범, 의사소통, 동기부여, 팀워크 배양, 부하개발 이다. 이를 바탕으로 역량기반 교육과정 개발을 위한 교육요구도 조사를 위해 현재 육군대학에 재학 중인 학생장교(소령) 407명을 대상으로 리더십 핵심역량별 바람직한 수준(중요도)과 자신의 현재 수준에 대한 설문을 실시하였다. 자료분석은 설문결과에 성실하게 응답한 218명을 대상으로 실시하였다. 설문결과 분 석을 통해 Borich 요구도가 상위 50%에 속하며, The Locus for Focus Model의 제 1사분면에 있는 군사 지식, 회복탄력성, 의사소통, 동기부여, 부하개발을 최우선 역량으로 판단하고, 제 2사분면에 있는 상황판 단/결심을 차선으로 판단하였다. 다만 군사지식은 육군대학 전 교육과정을 통해 습득하므로 제외하였다. 이 결과는 육군대학의 리더십 역량기반 교육과정 개발을 위한 기초자료가 될 것으로 기대된다.
        5,800원
        2.
        2008.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Development of T. urticae was studied on the leaves of eggplant grown in hydroponics with silica contents of 0 mM, 1.7 mM, and 5.1 mM. As the levels of silica increased, those of N, P, K, Ca, and Mg decreased and those of Si increased. While contents of calory, crude protein, carbohydrates, and vitamin C decreased, those of ash, fiber, and sugar increased. Biomass and content of cholorophyll decreased as the level of silica increased while leaves became thicker. Laboratory leaf disc tests provided with various silica levels revealed that feeding preference of T. urticae was the highest at 0 mM and the lowest at 1.7 mM. The oviposition preference decreased as the levels of silica increased, on the lower leaf appeared to hinder the feeding and the oviposition of T. urticae. The development slowed down both in female and male. Adult life span of female shortend as the silica level increased and that of male was the longest as 5.7 days at 0mM and the shortest at 1.7 mM. Oviposition period also shortened as the silica content increased. The number of eggs laid was the most as 86.3 at 1.7 mM while average oviposition per day was the least as 7.7 at 0 mM. No differences in hatchability was detected whereas the ratio of sex was the highest as 0.71 in favor of female at 0mM. R<SUB>o</SUB> and T decreased as the levels of silica increased. Rm and was the lowest at 5.1 mM while Dt was the longest as λ 1.8271 at 5.1 mM and the shortest as 1.6991 days at 1.7 mM. Silica content in eggplant turned to affect the development of T. urticae, however, it deterred T. urticae from feeding and oviposition and the rate of increase tended to decrease due to lesser nutrients in the eggplant leaf.
        4,000원
        3.
        2008.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        환경이 조절되는 폐쇄형 식물생장시스템에서 플러그 셀 크기(105공, 162공, 288공)와 일장(8/16, 12/12, 16/8hr, 낮/밤) 처리를 각각 달리하여 20일간 생산된 감자 플러그 묘 '수미'와 대지'의 생육과 수량에 미치는 영향을 알아보고자 실험을 수행하였다. 정식 7주째 '수미'의 플러그 셀 크기와 일장처리는 생육과 상대생장률에 차이를 주었다. '수미'의 주당 괴경 중은 셀 크기와 일장이 증가함에 따라 증가하였다. '대지'의 괴경 중은 105공 셀 크기에서 높았으며, 일장 처리에 차이를 보였다. 90일 재배 후, '수미'의 괴경 중(258.9~471.9g/주)은 105공, 162공 처리와 16/8 hr 일장 처리에서 괴경 중이 높았다. '대지'의 괴경중 (278.2~428.0g/주)은 105공 처리에서 높았으나 일장처리 간에는 차이가 없었다. 주당 괴경 수는 '수미'가 2.9~6.9개, '대지' 2.2~3.6개로 플러그 셀 크기와 일장 처리에 따른 유의성은 없었다. 80g 이상의 괴경 크기 비율이 '수미'는 32~50.9%, '대지'는 41.0~56.7%로, 두 품종 모두 288공 셀 크기에서는 감소하였고, 일장 처리 간에는 품종에 따른 차이를 보여 '수미'는 일장이 증가함에 따라 괴경 수가 증가하는 경향을 보였으나, '대지'는 일장 처리에 따른 차이를 보이지 않았다. 이상의 결과, 초기 묘 소질이 감자 생육 및 괴경 중에 영향을 줌으로써 플러그 묘를 이용한 감자 생산에 적합한 플러그 셀 크기는 162공 이하, 12시간 이상의 일장이 필요하리라 판단되었다.
        4,000원
        4.
        2003.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Synthesis gas is produced commercially by a steam reforming process. However, the process is highly endothermic and energy intensive. Thus, this study was conducted to produce synthesis gas by the partial oxidation of methane to cut down the energy cost. Supported Ni catalysts were prepared by the impregnation method. To examine the activity of the catalysts, a differential fixed bed reactor was used, and the reaction was carried out at 750~850℃ and 1 atm. The fresh and used catalysts were characterized by XRD, XPS, TGA and AAS. The highest catalytic activity was obtained with the 13wt% Ni/MgO catalyst, with which methane conversion was 81%, and H2 and CO selectivities were 94% and 93%, respectively. 13wt% Ni/MgO catalyst showed the best MgNiO2 solid solution state, which can explain the highest catalytic activity of the 13wt% Ni/MgO catalyst.
        4,000원
        5.
        2003.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Synthesis gas is commercially produced by a steam reforming process. However, the process is highly endothermic and energy-consuming. Thus, this study was conducted to produce synthesis gas by the partial oxidation of methane to decrease the energy cost. Supported Ni catalysts were prepared by the impregnation method. To examine the activity of the catalysts, a differential fixed bed reactor was used, and the reaction was carried out at 750~850℃ and 1 atm. The fresh and used catalysts were characterized by XRD, XPS, TGA and AAS. The highest catalytic activity was obtained with the 13wt% Ni/MgO catalyst, with which methane conversion was 81%, and H2 and CO selectivities were 94% and 93%, respectively. 13wt% Ni/MgO catalyst showed the best MgNiO2 solid solution state, which can explain the highest catalytic activity of the 13wt% Ni/MgO catalyst.
        4,000원
        6.
        2003.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        To prepare alkaline degreasing agents(SADAs), tetrasodium pyrophosphate(TSPP), Na2CO3, Tetronix T-701 (T-701), Na-dioctyl sulfosuccinate(303C), Demol C, and MJU-100A were blended. The prepared degreasing agents were tested with steel specimens and the results were as follows. The degreasing powers of SADA-6(Na2CO3 50g/TSPP 25g/T-701 10g/303C 15g/Demol C 12g/MJU-100A 8g/water 130g mixture) for press-rust preventing oil were 98% and 99% degreasing at 4wt%, 70 ℃ and 90 ℃, respectively; for quenching oil, the degreasing power of SADA-6 was 92% degreasing at 4wt% and 70 ℃. From these results, it was proved that the SADA-6 exhibits a good degreasing power. Foam heights measured immediately after foaming by Ross & Miles method and Ross & Clark method at 6wt% and 60 ℃ were 16mm and 40mm, respectively. SADA-6 was proved a good low foaming degreasing agent.
        4,000원
        7.
        1997.01 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        VO2 써모크로믹 원도우의 가시광 투과율을 높히기 위하여 내마모성이 우수한 SiO2박막을 이용하여 AR(anti-rdflection)코팅을 하였다. 두가지 중요한 공정변수인 기판온도와 증착속도가 AR효과에 미치는 영향을 조사하였다. 그리고 SiO2박막의 AR효과는 낮은 기판온도와 높은 증착속도에서 더 우수한 것으로 나타났으며, 이는 SiO2AR 박막의 굴절율과 상관관계가 있는 것으로 나타났다. VO2 써모크로믹 유리 위에 SiO2AR-코팅을 했을 때 약 30% 정도의 가시광 투과율의 향상이 있었다. 그리고 AR-코팅을 하지 않은 경우보다 더 뚜렷한 써모크로미즘을 나타냈다. 또한 천이온도는 70˚C정도로 AR-코팅을 하지 않은 VO2써모크로믹 유리의 경우와 같게 나타났다.
        4,000원
        8.
        2018.05 서비스 종료(열람 제한)
        Background : This study was carried out to investigate the differences of growth characteristics, photosynthetic rate and ginsenoside content of Panax ginseng C. A. Meyer according to the covering materials during house cultivation. Also the results of this study will be used as basic data for the standardization of ginseng house cultivation. Methods and Results : This experiment site was conducted from March to October, 2017 in the house located in Jinan - gun, Jeollabuk-do. The ginseng cultivar used in the experiment was a violet stem variant of 4-years-old. There are three kinds of covering materials used in the experiments: polyethylene (PE) film, scattering film, and blue-white film. PE film and the scattering film were first coated with 85% of light shielding net after the first installation, and then secondly coated with 75% and 30% of the light shielding net respectively in the middle of May when the house temperature reached 25℃. The blue-white film was cultivated after the initial installation without further treatment. The light transmittance of each covering materials were in the order of scattering film (14.5 ± 1.5%), blue-white film (10.0 ± 1.0%) and PE film (6.7 ± 1.0%). The average photosynthetic rate of each treatment was in the order of scattering film (2.94 μmol CO2/㎡/s), blue film (2.71 μmol CO2/㎡/s) and PE film (2.34 μmol CO2/㎡/s). Aboveground growth characteristics of ginseng were good in a scattering film and blue-white film. Root weights were found in the order of scattering film (47.1 g/plant) > blue-green film (41.3 g/plant) > PE film (37.6 g/plant). Conclusion : In order to select proper covering materials for ginseng house cultivation, the growth and photosynthetic characteristics of each treatment were compared with each other in order of scattering film, blue-white film and PE film. The photosynthetic rate of each treatment was measured according to the growing season. PE film was relatively low during the entire growth period. In the case of scattering film and blue-white film, the rate of photosynthesis was higher in the scattering film with high light transmittance until May, but showed a similar tendency after July. As a result, the difference in the growth characteristics of ginseng is thought to be due to differences in photosynthesis and assimilation according to the coating materials.
        9.
        2018.05 서비스 종료(열람 제한)
        Background : To develop a new cultivation technique which can save the labor and harvest cost in Cynanchum wilfordii. Stable production is possible for soil and container cultivation. Therefore, this test was conducted to evaluate the reuse effect that can reduce the cost of culture soil. Methods and Results : Container standards were used plume tube of diameter 30 ㎝ × height 50 ㎝. The blending ratios of reuse cultivation soil were 60% cocopeat, 10% peatmoss, 6% pearlite, 6% vermiculite, 5% zeolite, and 5% char. To this, 0, 10, 20, and 30% of composts containing 45% of fowl droppings and 5% of cattle dung were added to the culture soil and mixed. In each treatment C. wilfordii seedling were planted, and the overground growing and yield ability were examined. After harvesting, the functional components contents (cynanoneside B, wilfoside C1N, and p-hydroxyacetophenone) of C. wilfordii conventional cultivation and container cultivation (culture soil) were analyzed. As a result, the growth of overgrown crops showed better tendency as the compost content increased. However, the growth and yield of undergrowth increased by 182% (164.7 ㎏/10 a → 282 ㎏/10 a) compared to no addition at 20% mixing ratio. The content of functional ingredients according to cultivation method and skin was not different all in cynanoneside B, wilfoside C1N, and p-hydroxyacetophenone. Therefore, it was a larger tendency that the classification according to whether it was skined (existence and nonexistence) than the cultivation method. In the economic analysis, it was found that when the cultivation soil was reused by adding 20% compost, the profit of 680,000 won/10 a was increased. Conclusion : Soil and container cultivation was effective saving method for harvesting ease of C. wilfordi, harvest yield was increased by 66%. Also, container cultivation was effective the cost cutting of installation dismantlement and redres since no need to move the cultivation area. As the cultivation soil can be reused, it can be expected to maximize the utilization in container cultivation of deep rooting medicinal crops as well as Cynanchum wilfordii.
        10.
        2018.05 서비스 종료(열람 제한)
        Background : This experiment was conducted to study the characteristics of Korean ginseng (Panax ginseng C. A. Meyer) growth by LED artificial light source in the plastic house using multi-stage cultivation facility and artificial soil. Methods and Results : Seedlings of Korean ginseng cultivar cultivated from 6:00 am to 6:00 pm by adjusting the ratio of 1 : 1, 2 : 1 and 3 : 1 for red light and blue light for the LED light quality test. Controls were tested by treating the white light (fluorescent lamps) for the same time. The average temperature inside the plastic house remained above 25℃, then below 25℃ after mid-August and below 20℃ after mid-September. The temperature near the roots of the artificial soils was higher than 26℃ in late July and early August and lowered to 20℃ or lower in all treatments in September. The pH of the soil was in the standard range, but the EC value was 2.89 in the soil before the test and 5.83 in the white light treatment, higher than the standard range of 1.0. The light intensities were 95.3 μmol and 94.9 μmol in the 3 : 1 and 2 : 1 ratios of red and blue light, respectively. The photosynthetic rate was 1.72 μmole CO2/㎡/s in 3 : 1 treatment and 1.9 times higher than white light treatment. As the red light ratio increased, the light amount and photosynthetic rate increased. Growth characteristics of aerial parts (plant height, leaf length etc.) by LED irradiation were longer than that of white light treatment in the 2 : 1 or 3 : 1 treatment of red light and blue light. The root length was the longest at 13.7 ㎝ in the 3 : 1 treatment of red and blue light, taproot length were 6.9 ㎝ and 6.6 ㎝ in the 2 : 1 treatment and 3 : 1 treatment, respectively, longer than 4.3 ㎝ in white light. Root fresh weight was the heaviest (3.6 g/plant) in 3 : 1 treatment for red and green lights. Conclusion : It was confirmed that the rate of photosynthesis of Korean ginseng was higher than that of white light treatment and the growth characteristics of aerial and root parts were excellent at the ratio of 3 : 1 of LED red light and blue light in plastic house using multi-stage cultivation facility and artificial soil.
        11.
        2018.05 서비스 종료(열람 제한)
        Background : This study was conducted to investigate the effect of inorganic compounds (germanium etc) on the characteristics of growth and ginsenoside contents in Korean ginseng (Panax ginseng C. A. Meyer) cultivated in plastic houses. Methods and Results : The experiments were performed in the Jinan (elevation: 300 meters above sea level). Seedlings (n = 72 per 3.3㎡) of Korean ginseng cultivar were planted on March 23, 2015. Shading material of plastic house was blue-white vinyl. From May to September of each year, 500 and 1,000 times diluted solution of germanium and silicate and these mixed solutions were drenched once a month. The chemical properties of the soil are as follows : pH, EC, organic content, and P2O5 of the soil were within the proper range, and the Mg content of the Ex-cations was lower than the standard value in 3 treatments, including 500 times solution of silicate. The rate of photosynthesis in Korean ginseng leaves were 2.2 - 2.5 μmole CO2/㎡/s in germanium and silicate treatment than in the non-treatment (1.5 μmole CO2/㎡/s). In the mixed treatment of silicate and germanium, the growth characteristics of the aerial parts (leaf and stem) of the Korean ginseng plants tended to be higher and longer than the other treatments. In a mixed germanium and silicate treatment, the root length was 33.3 ㎝, diameter was 23.5 ㎜, and the weight was the best at 53.8 g. The ginsenoside content was 16.8 ㎎/g in germanium treatment, 16.3 ㎎/g in germanium + silicate treatment. These were 37% and 33% higher than the control, respectively. The incidence of disease such as Alternaria panax was less in the inorganic treatment than in the non-treatment, and the incidence of disease was significantly decreased in the treatment with germanium + silicate. Conclusion : By soil drench of inorganic ingredients in Korean ginseng plastic house cultivation, the growth of the aerial and root parts in ginseng were more improved than non-treatment and ginsenoside content was increased and decreased the incidence of disease.
        12.
        2018.05 서비스 종료(열람 제한)
        Background : The purpose of this study was to establish the optimum organic compost composition and fertilizer application for nutrient management during the cultivation of Korean ginseng (Panax ginseng C. A. Meyer) in the greenhouse. Methods and Results : Wood chips, popped rice hulls, and mixed expeller cake were mixed with certain contents, fermented microorganisms were added, and fermented for about 100 days to produce organic composts. Organic compost was applied to the greenhouse soils at a rate of 1,500 – 3,000 ㎏/10 a, and the Korean ginseng seedlings were planted (2015) and cultivated. The growth and quality characteristics of 4-years-old Korean ginseng were investigated as follows. In all treatments, the emergence date were April 17, and the emergence rate were 70 - 74%. Soil chemical properties such as pH (6.7 - 6.8) and trace element Ca (7.9 - 9.2 cmol+/㎏) were higher than the standard values, and EC, P2O5 and OM were appropriate. Disease incidence rate were less than 0.2% in the control (treatments of livestock manure compost 1,500 ㎏/10 a) and treatment 3 (wood chips 60% + popped rice hulls 40%), but there were no disease in other treatments. Plant growth such as plant height, leaf length, and stem diameter were superior to treatment 1 (wood chips 20% + popped rice hulls 80%), and growth of underground part such as root length were excellent in treatment 1 as a whole. In particular, in the application of 1,500 - 2,000 ㎏ of treatment 1, root weight (39.9 g, 42.3 g/plant, respectively) were superior to the other treatments. In general, as woodchip content and usage amount increase, root weight tended to decrease. Conclusion : It is considered appropriate to apply 1,500 - 2,000 ㎏/10 a of fermented compost of organic material which is mixed with wood chips (20%) and popped rice hulls (80%) with mixed expeller cake when growing Korean ginseng in the plastic house covered with blue-white vinyl.
        18.
        2016.05 서비스 종료(열람 제한)
        Background : This study was conducted to developed the propagation method by cutting for mass cultivation of Vitex roundifolia. We were pitched the cutting two times and treated plant growth regulators to enhance the rooting percentage. Vitex roundifolia is live in beach sandy soil south of Hwanghae-Do and Gangwon-Do. Vitex roundifolia have been used to bath foam. It is good for aromatic plant. It has 0.8% essential oil content in leaf and flower. Major components of essential oil were alpha-Pinene, Sabinene, beta-Pinen, 1,8-cineole, d-Limone. Despite the superior usability, it had not yet been made by the artificial cultivation Methods and Results : We were pitched the cutting of a first-year branch on June 5, which was greenwood cutting and July 17, which was semi-hardwood cutting at Kwangseung-ri beach, Gochanggun, Jeonbuk. The length of cutting was 10cm. It had 3~4 nodes, we stuck a cutting remain 2 nodes above ground on ordinary raise seedling soil. Rooting percentage was measured at 60 days after stuck a cutting. Rooting percentage was higher greenwoody cutting(95%) than semi-hardwood cutting(57.6%). In green wood cutting, there was no significance with plant growth, but chemical injury was occurred in IBA 5,000ppm. In semi-hardwood cutting, there was significance with plant growth regulators. The rooting percentages of all the treat were higher than control(no treatment). Rooting percentage was the highest in NAA 5,000ppm treated. Conclusion : Greenwood cutting method was more proper to propagation for Vitex roundifolia than semi-hardwood cutting. The optimum time to cutting for Vitex roundifolia propagation was the early in June. If miss a time to propagation Rooting percent was elevated by plant growth regulator.
        19.
        2016.05 서비스 종료(열람 제한)
        Background : This experiment was conducted to find the right degree of shading to reduce summer months when the death Allium hookeri cultivation in the southern highland in Korea. This experiment was conducted at an altitude of 500m, Jeonbuk Namwon unbong plateau region The soil was tested in phosphatic content was slightly higher so 671 ㎎/㎏ than regular soil. Every soil testing was conducted in sandy soil with good water. The test day highs at 50% shading plots of shading in this period about 6.1℃ lower than the non-shading. The soil temperature is lowered to 1.9℃ at 50% shading plots compared with the non-shading. As a result, Allium hookeri underground quantities produced per 1,682 ㎏ 10a in 50% shading plots. This was a 35% increase compared to the non-shading plots. Allium hookeri is native to the Alpine 4,200m from 1,400m above sea level, near the Himalaya Mountains. Myanmar is known as the National vegetables. Allium hookeri is Allium plants. It flies three flavors, including sweet, spicy, bitter taste. Allium hookeri roots are similar to ginseng roots called as 'three vegetable' This is a randomly named. The in Korea was first introduced in 2006. By 2015, the country has been found to 190㏊, Jeonbuk 35㏊ (18.3%) is growing. Therefore, this study was conducted to introduce the cultivation of plants in the southern highland in Korea. Methods and Results : In order to use this experimental Allium hookeri seedlings were planted in Jeonbuk Sunchang after buying. Allium hookeri cultivation methods put the 3∼4 one eye on the roots. Planting the root length was cut to leave a 3∼5㎝. The planting distance was 40×20㎝. The shielding 35, two months were 50 and 75% by July 1, August 31. The air temperature, soil temperature were investigated in accordance with the changes of light in this experiment. And examined the withering rate, brightness, growth conditions, such as Yield. Conclusion : Test results were as follows. Allium hookeri roots emerged on March 2 during planting 43-68 days. Allium hookeri after shading shoot growth characteristics were as follows. 35% shading and 50% shading was a tendency for the number of leaves increased compared to the non-shading. As a result, flooding was 35% as compared to production per 10a 1,682 ㎏ no light shielding at 50%. Plant analysis leaf mineral contents tended increased nitrogen, phosphate, gallium compared to the non-light cultivation. Mineral contents of the root was nitrogen, potassium is higher in comparison with 75% shading no shading.
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