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        검색결과 252

        121.
        2012.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The objective of this study was analyze the relationship among emotional intelligence, job attitude (job satisfaction, organizational commitment, turnover intention), and organizational performance in kitchen staff. A survey collected data from foodservice employees (N=611). Statistical analyses were completed using SPSS Win (17.0) for descriptive analysis, reliability analysis, factor analysis, t-test, correlation analysis, and AMOS (7.0) for confirmatory factor analysis and structural equation modeling. The main results of this study were as follows. The four EI (Emotional Intelligence) dimensions significantly correlated with age. The mean of the job satisfaction score was 3.24. The organizational commitment score was 3.54. The organizational commitment score was higher for 'loyalty' factor than for 'sense of belongs' factor. The mean of organizational performance score was 3.61. The four EI(Emotional Intelligence) factors were significantly correlated with job satisfaction (organizational commitment, organizational performance, and turnover intension). Structural equation modeling found that emotional intelligence had positive effects on job satisfaction, organizational commitment, and organizational performance, whereas job satisfaction and organizational performance had positive effects on organizational performance. Therefore, this study found that emotional intelligence had direct and indirect effects on organizational performance.
        4,500원
        122.
        2012.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        붉은배새매(Accipiter soloensis)는 국내에서 가장 흔히 번식하는 맹금류에 해당함에도 불구하고, 이 종의 번식기 공간이용에 대한 정보는 부족한 실정이다. 붉은배새매의 번식기 세력권과 행동권을 파악하기 위하여 국내에서 번식하는 6쌍(2005년 4쌍, 2006년 2쌍)의 수컷을 6월부터 7월까지 관찰하였다. 이를 통해 수컷이 3회 이상 반복적으로 이용하는 주요 지점과 명확한 세력권 방어 행동을 보이는 지점을 확인하고, 이를 GIS 프로그램으로 분석하였다. 확인된 25.2±5.3개 지점을 중심으로 100% 최소다각형법(minimum convex polygon)을 이용하여 분석한 결과, 붉은배새매의 번식기 세력권은 4.62±0.90 ha, 행동권은 22.57±5.12 ha에 해당하는 것으로 나타났다. 본 연구에서 확인된 붉은배새매의 세력권과 행동권은 비록 기존에 보고된 값보다 넓었으나, 전체 번식기에 걸쳐 이용하는 절대적인 공간 규모가 여전히 작다는 점을 보여준다. 이는 붉은배새매가 먹이를 제공할 수 있는 좁은 서식지, 특히 0.6-2.0 ha에 불과한 논에서 발생할 수 있는 환경 변화나 자원 고갈에도 상당히 취약할 수 있다는 것을 의미한다. 본 연구는 관찰을 통한 세력권 추정에 해당하지만, 붉은배새매의 보전과 관리, 향후 연구를 위한 기초연구로서의 중요성이 있다고 판단된다.
        4,000원
        123.
        2012.04 구독 인증기관·개인회원 무료
        This study aims at developing a new shape damper and suggestion for seismic silo structure, which contribute to increase significantly seismic performance and constructional efficiency. The suggested N.B.B.D system is more likely to adoptable because it remarkably contribute to save inter-story drift also to have many advantages compared with conventional X or K type braced frame.
        124.
        2012.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        최근 인터넷의 발달과 스마트폰의 보급으로 미디어와 정보 수용자는 상호작용이 가능하게 되었고, 휴대용 디바이스를 통해 실시간으로 정보를 접할 수 있게 되었다. 하지만 정보의 특성이나 정보가 전달되는 미디어의 종류에 따라 정보 수용자가 정보에 대해 가지는 신뢰도에 영향을 준다. 이러한 이유로 미디어와 정보의 신뢰도와의 관계에 대해 많은 연구가 이루어지고 있지만, 대부분의 연구는 신문, 방송, 온라인 뉴스 매체의 신뢰도를 비교하는데 그 중점을 두고 있다. 또한 인터넷을 기반으로 쌍방향성의 특징이 있는 미디어 기기간의 신뢰도 비교연구는 드문 것이 현실이다. 이에 본 연구는 화면 크기의 차이에 따른 미디어 기기별 사용성의 차이를 가정하여, 인터넷을 통해 정보를 접할 수 있는 서로 다른 세 가지 기기(PC, 태블릿 PC, 스마트폰)가 기사정보 내용을 전달할 때 신뢰도에 어떠한 영향을 미치는지 알아보고자 하였다. 본 연구의 결과는 미디어 기기의 화면 크기에 따른 기사정보 내용의 신뢰도가 보도기사, 의견기사, 피처기사 등 기사의 종류별로 다르게 나타났다. 즉 미디어 기기의 특성에 대한 정보 수용자의 감정이나 이미지, 신뢰도 등이 그 매체를 통해 전달되는 정보에도 투영되어 상호작용하는 것을 경험적으로 확인할 수 있었다. 이러한 결과를 통해 미디어 기기의 화면 크기와 같은 사용성 차이 발생 요소들이 미디어 콘텐츠 개발에 중요한 요소로서 의미가 있음을 알 수 있다.
        4,000원
        125.
        2012.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This research focused on the effects of adding Hizikia fusiforme to Jeolpyun. We were able to demonstrate in this study that Jeolpyun after the addition of Hizikia fusiforme had the potential to become a functional food. Jeolpyun with 0, 2, 4, 6, and 8% of Hizikia fusiforme was analyzed by water content, color, sensory and textural characteristics immediately after production and one day later. The five different types of Jeolpyun did not show any significant differences in water content. However, all the Jeolpyun with Hizikia fusiforme showed slightly higher water retention ratio than the control after storage. As the result of Hunter's color values, lightness decreased significantly as the amount of Hizikia fusiforme increased. Redness increased in the Jeolpyun with Hizikia fusiforme compared with the control. Yellowness was highest in the Jeolpyun with 2% of Hizikia fusiforme and decreased with an increase in its content. In the textural analysis, hardness, chewiness, adhesiveness and gumminess of Jeolpyun with 2% and 4% of Hizikia fusiforme were similar to those of the control, whereas springiness of Jeolpyun with 2%, 4% and 6% of Hizikia fusiforme were similar to that of the control group. Cohesiveness significantly decreased as the amount of Hizikia fusiforme increased. When the Jeolpyun was preserved for one day, all five Jeolpyun showed significant increases in hardness, gumminess and chewiness. However, their adhesiveness significantly decreased. Cohesiveness decreased in all Jeolpyun except for the 8% Jeolpyun. In sensory evaluation, color and aroma became stronger as the content of Hijikia fuziforme increased, and 2% Jeolpyun showed similar hardness with the control. Jeolpyun with Hijikia fuziforme showed no difference in cohesiveness with the control, but the adhesiveness showed a little increase when compared to the control. The overall acceptability of 2% Jeolpyun showed slightly higher than control. After one day of storage, Jeolpyun with 2% of Hijikia fuziforme also showed the highest overall acceptability. And the overall acceptability showed the biggest decrease in the control group. Overall acceptability showed strong negative correlation with color, aroma and hardness, and showed strong positive correlation with cohesiveness and adhesiveness. After one day of storage, overall acceptability showed a decrease in correlation with color and smell and an increase in correlation with cohesiveness, compared to before storage. Results of multiple regression analysis showed that hardness had the biggest influence(-) on the overall acceptability of Jeolpyun, aroma and cohesiveness ranked second(-) and third(+) respectively. After one day of storage, cohesiveness had the biggest influence on the overall acceptability of Jeolpyun. Color and adhesiveness ranked second(-) and third(+) respectively. It can be seen that different factors influence overall acceptability of Jeolpyun after storage.
        4,000원
        126.
        2011.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study was performed to investigate the antioxidant effects of 4 citrus fruits including Hallabong,Cheonhyehyang, Cheonggyeon, and Jinjihyang. In this study the citrus fruits were separated in three parts of peel, pulp segment membrane (PSM), and pulp and extracted with methanol, then concentrated using a rotary vacuum evaporator. Total polyphenol contents ranged 23.497~42.341 mg/g in peel, 13.285~21.872 mg/g in PSM and 6.333~11.627 mg/g in pulp of the citrus fruits. The total polyphenol contents were highest in the peel and PSM of Jinjihyang and in the pulp of Cheonhyehyang. 1,1-diphenyl-2picryl hydrazyl (DPPH) radical scavenging activities were highest in the peel and PSM of Jinjihyang and in the pulp of Cheonhyehyang. 2,2’-Azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging capacities were also highest in the peel and PSM of Jinjihyang and in the pulp of Cheonhyehyang. Reducing powers were highest in the peel of Cheonggyeon, in the PSM of Jinjihyang,and in the pulp of Cheonhyehyang. There were significant correlations in between total polyphenol contents and the radical scavenging activities, and reducing power each other. These results indicate that the 4 citrus fruits (Hallabong, Cheonhyehyang, Cheonggyeon, and Jinjihyang) evidently have antioxidant capacities and their peel parts have the highest antioxidant activities.
        4,000원
        127.
        2011.11 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Field tests were carried out with five different mesh sizes (86.6, 101.0, 121.2, 137.7, 151.5mm) to study the relative efficiency of monofilament and multifilament gill net for Marbled sole, Pleuronectes yokohamae, in the western sea of Korea, 2007-2009. The relative efficiency was analyzed by length distribution, catch in number, catch in weight and weight per individual for Marbled sole. Statistical T-test was done to verify the efficiency between two gears. In the field tests, the total body length range, catch in number and weight of Marbled sole was 15.8-48.2cm, 728 and 254,939g, respectively. During the field tests, Marbled sole less than 15cm length which is prohibition size of fishing was not caught, but the caught number of Marbled sole less than 19.5cm length which is first maturity length was 13 (1.8%) and the caught number of Marbled sole more than 19.5cm was 715 (98.2%). Catches of monofilament gill net was average 1.4 times more efficient than multifilament gill net. The weight per individual and total length by mesh sizes in the two gears tended to gradually increase according to mesh size increasing. But there was little difference of weight per individual and total length by mesh sizes between two gears.
        4,000원
        128.
        2011.05 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Hydro-acoustic survey was carried out to estimate a fish distribution at marine ranching area and aggregated fish schools at artificial reef area in Oeyeondo, Korea. The survey system was set up with DGPS system, scientific echo sounder (EK60, Simrad Co.), and ECDIS (Mecys. Co. LTD). A track survey and a random survey was respectively applied to the marine ranching area (474.4ha) and to the artificial reef area (within a radius of 300m). As the result, fish distribution and MVBS values in marine ranching area showed that created fisheries resources didn't come to be abundant yet as to appear fish distribution in all of the area. In the artificial reef area, it was, however, able to detect many fish school signals on the top of and around artificial reefs and to confirm the luring effect of artificial reefs.
        4,000원
        129.
        2011.05 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Experimental fishing was carried out to compare the catches of main species and bycatch according to the codend mesh size (raschel, 15mm, 25mm, 35mm, 45mm) of stow net on anchor in the coastal waters of Seocheon after manufacturing five kinds of fishing gears and commercial fishing boat (7.93 tons) was used for it. Anchovy (Engraulis japonicus), southern rough shrimp (Trachysalambria curvirostris), beka squid (Loligo beka), cuttle fish (Sepia esculenta), swimming crab (Portunus trituberculatus) were dominant on the five kinds of experimental fishing gears. Southern rough shrimp was caught from all kinds of fishing gears and catches of anchovy was highest in the raschel codend, southern rough shrimp for 15mm, 25mm, 35mm codend and beka squid for 45mm codend. Bycatch proportion against total catches was 623,376g (28.7%) for 2,171,844g in raschel, 11,932g (1.7%) for 704,451g in 15mm, 3,616g (1.6%) for 221,432g in 25mm, 9,276g (4.9%) for 191,052g in 35mm and 2,724g (5.3%) for 51,431g in 45mm.
        4,200원
        130.
        2011.04 구독 인증기관 무료, 개인회원 유료
        The conventional RC flat plate slab system have many good features, which are design flexibilities, saving of story-height and economy of construction etc. But the study of flat plate slab system for H-steel or SRC column have been rare both at home and abroad. Main topics in this study is a new structural detail for connection between H-Steel or SRC column and flat plate slab. The test for lateral performance of connection between H-Steel or SRC column and flat plate slab was carried out. From the test results structural characteristics - yield moment, yield rotation, maximum moment, deformation capabilities and so on - are obtained and evaluated.
        3,000원
        131.
        2010.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The transesterification of rapeseed oil, soybean oil, and mixed fat were conducted at 65℃ with Al2O3-supported CaO, 0.8 wt% KOH, 1 wt% NaOH and mixed catalyst. The overall conversion(%) of rapeseed oil indicated to be 96% at the 12:1 molar ratio of methanol to oil, 8 wt% CaO and 2 wt% water. The pH ranges of biodiesel for mixed fat using four catalysts and for three fats using 8wt% CaO were 7.3-9.1, 7.3-7.5, respectively. The volumes of water needed to wash biodiesel from rapeseed oil using 0.8 wt% KOH and 8 wt% CaO were 15 mL and 3 mL.
        4,000원
        132.
        2010.11 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        A diamond-like carbon (DLC) film deposited on a WC disk was investigated to improve disk wear resistance for injection molding of zirconia optical ferrule. The deposition of DLC films was performed using the filtered vacuum arc ion plating (FV-AIP) system with a graphite target. The coating processing was controlled with different deposition times and the other conditions for coating, such as input power, working pressure, substrate temperature, gas flow, and bias voltage, were fixed. The coating layers of DLC were characterized using FE-SEM, AFM, and Raman spectrometry; the mechanical properties were investigated with a scratch tester and a nano-indenter. The friction coefficient of the DLC coated on the WC was obtained using a pin-on-disk, according to the ASTM G163-99. The thickness of DLC films coated for 20 min. and 60 min. was about 750 nm and 300 nm, respectively. The surface roughness of DLC films coated for 60 min. was 5.9 nm. The Raman spectrum revealed that the G peak of DLC film was composed of sp3 amorphous carbon bonds. The critical load (Lc) of DLC film obtained with the scratch tester was 14.6 N. The hardness and elastic modulus of DLC measured with the nano-indenter were 36.9 GPa and 585.5 GPa, respectively. The friction coefficient of DLC coated on WC decreased from 0.2 to 0.01. The wear property of DLC coated on WC was enhanced by a factor of 20.
        4,000원
        133.
        2010.11 KCI 등재 구독 인증기관 무료, 개인회원 유료
        To estimate the mesh selectivity of monofilament and multifilament gill net for Marbled sole, Pleuronectes yokohamae, the field testes were carried out 12 times with five different mesh sizes (86.6, 101.0, 121.2, 137.7, 151.5mm) in the western sea of Korea, 2007-2009. The master curve of selectivity was estimated by the extended Kitahara's method. In the field testes, the total number of species and catch were 26 and 987, respectively. The catch number of marbled sole was 728 and occupied 73.8% in total catch. The optimum values of l/m for 1.0 of retention probability in monofilament and multifilament gill net were estimated 0.288 and 0.307, respectively and l/m was estimated to be 0.189, 0.203, 0.213, 0.222 and 0.230 in case of monofilament gill net and 0.171, 0.191, 0.205, 0.216 and 0.227 in case of multifilament gill net when the retention probability were 0.1, 0.2, 0.3, 0.4 and 0.5, respectively. The 0.5 selection range of multifilament gill net was wider about 1.5 times than that of monofilament gill net according as multifilament gill net was 0.216 and monofilament gill net was 0.148. So the multifilament gill net has a low selectivity than that of the monofilament gill net. To estimate the optimum mesh size on first maturity length 19.5cm of marbled sole, the retention probability value of 0.1 was adopted in consideration of using the gill net for marbled sole at present. The optimum mesh size were estimated to be 103.2mm and 114.0mm in monofilament gill net and multifilament gill net, respectively, on first maturity length 19.5cm of marbled sole.
        4,200원
        134.
        2010.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The continuous transesterification of mixed fat was done on the plug flow reactor packed with the static mixers. The transesterification using 0.5 wt% KOH, 0.8 wt% TMAH and mixed catalyst[40 v/v% KOH(0.5 wt%)+60 v/v% TMAH(0.8 wt%)] was conducted with the changes of molar ratios, weight percentage of beef, flow rates and number of static mixer's elements at 65℃. The overall conversion of mixed fat at 1:8 molar ratio, 50 wt% of beef and 24 of static mixer's elements increased until 0.7mL/min of flow rate. The overall conversion of mixed fat showed 96% at those conditions. So, the optimum operating conditions on tublar reactor were 1:8 molar ratio, 50 wt% of beef, 0.7 mL/min of flow rate and 24 of static mixer' s elements.
        4,000원
        135.
        2010.05 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        ZnO nanostructures were grown on an Au seed layer by a hydrothermal method. The Au seed layer was deposited by ion sputter on a Si (100) substrate, and then the ZnO nanostructures were grown with different precursor concentrations ranging from 0.01 M to 0.3M at 150˚C and different growth temperatures ranging from 100˚C to 250˚C with 0.3 M of precursor concentration. FE-SEM (field-emission scanning electron microscopy), XRD (X-ray diffraction), and PL (photoluminescence) were carried out to investigate the structural and optical properties of the ZnO nanostructures. The different morphologies are shown with different growth conditions by FE-SEM images. The density of the ZnO nanostructures changed significantly as the growth conditions changed. The density increased as the precursor concentration increased. The ZnO nanostructures are barely grown at 100˚C and the ZnO nanostructure grown at 150˚C has the highest density. The XRD pattern shows the ZnO (100), ZnO (002), ZnO (101) peaks, which indicated the ZnO structure has a wurtzite structure. The higher intensity and lower FWHM (full width at half maximum) of the ZnO peaks were observed at a growth temperature of 150˚C, which indicated higher crystal quality. A near band edge emission (NBE) and a deep level emission (DLE) were observed at the PL spectra and the intensity of the DLE increased as the density of the ZnO nanostructures increased.
        4,000원
        136.
        2010.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Retarding retrogradation of Korean rice cakes(Karedduk) with a mixture of trehalose and Sun-Tender added, after 0, 24, and 48 hr of storage at 5℃, was analyzed by Avrami kinetics. A central composite design was used for arrangement of treatment. The two independent variables selected for retarding retrogradation analysis were amounts of trehalose(x) and Sun-Tender(y). Trehalose was added at 0, 3, 6, 9, and 12% levels, and Sun-Tender added at 0, 0.3, 0.6, 0.9, and 1.2% levels, to dry rice flour. The Avrami exponent(n) for the mixtures of 9% trehalose and 0.3% Sun-Tender, and 9% trehalose and 0.9% Sun-Tender were lower than in the control. The time constant(1/k) for the mixture of trehalose and Sun-Tender was higher than in the control. The effect of retarding retrogradation of Korean rice cakes with added mixtures of trehalose and Sun-Tender showed an increasing trend as the amount of trehalose increased. These results suggest that adding a mixture of 9% trehalose and 0.3% Sun-Tender, or 9% trehalose and 0.9% Sun-Tender to Korean rice cakes(Karedduk) is effective for retarding retrogradation.
        4,000원
        137.
        2010.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Experimental fishing was carried out to compare fishing status according to the codend mesh size (raschel, 15mm, 25mm, 35mm, 45mm) of stow net on anchor in the coastal waters of Seocheon after manufacturing five kinds of fishing gears and commercial fishing boat (7.93 tons) was used for it. Total catches of raschel, 15mm, 25mm, 35mm, 45mm codend were 816,949g, 203,994g, 1,405g, 51,576g, 194g in September and 40,545g, 66,974g, 14,692g, 12,647g, 12,655g in October. Dominance species were anchovy (Engraulis japonicus) in raschel codend, largehead hairtail (Trichiurus lepturus) in 15mm and 35mm in September, and the amount of catches was very small in 25mm and 45mm codend due to the fishing gear damage. In October, dominance species were anchovy and beka squid (Loligo beka) in raschel, 15mm, 25mm codend, and cuttlefish (Sepia esculenta) and beka squid were mainly caught in 35mm and 45mm codend. In addition, total length of anchovy and cardinal fish (Apogon lineatus) were increased according to the increase of codend mesh size but there was no difference in the mantle length of cuttlefish and loligo beka.
        4,000원
        138.
        2009.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The esterification of palmitic acid in Jatropha Oil using 8wt% p-TSA catalyst was done at the 1:8 molar ratio of oil to methanol and 65℃. The conversion of palmitic acid appeared to be 95.3% in 60min. After that, the continuous transesterification of the oil using 0.5wt% KOH, 0.8wt% TMAH mixed catalyst[40vol% KOH(0.5wt%) + 60vol% TMAH(0.8wt%)] and 1.1wt% TMAH was conducted with the flow rates and the molar ratios at 65℃. The overall conversion of Jatropha Oil increased with the decrease of flow rate and showed 95.6% with 9ml/min of flow rate at the 1:8 molar ratio of oil to methanol and 65℃. But it showed 87% with 15ml/min of flow rate at the same conditions. The recovery of methanol(%) appeared to be 86% at the 1:8 molar ratio of oil to methanol, mixed catalyst and 65℃.
        4,000원