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        • KCI등재

          Value of clay as a supplement to swine diets

          Mun,,Daye,Lee,,Jongmoon,Choe,,Jeehwan,Kim,,Byeonghyeon,Oh,,Sangnam,Song,,Minho Institute of Agricultural Science 2017 Korean Journal of Agricultural Science Vol.44 No.2

          The use of practical management factors to maximize pig health improvement cannot guarantee freedom from diseases. Moreover, because of health safety concerns, the use of antibiotics has been restricted in livestock, including pigs. Therefore, the swine industry has been looking for various alternatives to antibiotics to improve pig's health and performance. Clay is a dietary factor generally accepted for improving pig health. It is a naturally occurring material and is primarily composed of fine-grained minerals. It has a specific structure with polar attraction. Because of this structure, clay has the ability to lose or gain water reversibly. In addition, clay has beneficial physiological activities. First, clay has anti-diarrheic and antibacterial effects by penetrating the cell wall of bacteria or inhibiting their metabolism. Second, it can protect the intestinal tract by absorbing toxins, bacteria, or even viruses. When added to the diet, clay has also been known to bind some mycotoxins, which are toxic secondary metabolites produced by fungi, namely in cereal grains. Those beneficial effects of clay can improve pigs' health and performance by reducing pathogenic bacteria, especially pathogenic Escherichia coli, in the intestinal tract. Therefore, it is suggested that clay has a remarkable potential as an antibiotics alternative.

        • Development of a Daily Solar Major Flare Occurrence Probability Model Based on Vector Parameters from SDO/HMI

          Lim,,Daye,Moon,,Yong-Jae,Park,,Jongyeob,Lee,,Kangjin,Lee,,Jin-Yi The Korean Astronomical Society 2017 天文學會報 Vol.42 No.2

          We present the relationship between vector magnetic field parameters and solar major flare occurrence rate. Based on this, we are developing a forecast model of major flare (M and X-class) occurrence rate within a day using hourly vector magnetic field data of Space-weather HMI Active Region Patch (SHARP) from May 2010 to April 2017. In order to reduce the projection effect, we use SHARP data whose longitudes are within ${\pm}60$ degrees. We consider six SHARP magnetic parameters (the total unsigned current helicity, the total photospheric magnetic free energy density, the total unsigned vertical current, the absolute value of the net current helicity, the sum of the net current emanating from each polarity, and the total unsigned magnetic flux) with high F-scores as useful predictors of flaring activity from Bobra and Couvidat (2015). We have considered two cases. In case 1, we have divided the data into two sets separated in chronological order. 75% of the data before a given day are used for setting up a flare model and 25% of the data after that day are used for test. In case 2, the data are divided into two sets every year in order to reduce the solar cycle (SC) phase effect. All magnetic parameters are divided into 100 groups to estimate the corresponding flare occurrence rates. The flare identification is determined by using LMSAL flare locations, giving more numbers of flares than the NGDC flare list. Major results are as follows. First, major flare occurrence rates are well correlated with six magnetic parameters. Second, the occurrence rate ranges from 0.001 to 1 for M and X-class flares. Third, the logarithmic values of flaring rates are well approximated by two linear equations with different slopes: steeper one at lower values and lower one at higher values. Fourth, the sum of the net current emanating from each polarity gives the minimum RMS error between observed flare rates and predicted ones. Fifth, the RMS error for case 2, which is taken to reduce SC phase effect, are smaller than those for case 1.

        • SCIESCOPUSKCI등재

          Design of an 8x Four-group Inner-focus Zoom System Using a Focus Tunable Lens

          Lee,,Daye,Park,,Sung-Chan Optical Society of Korea 2016 Journal of the optical society of Korea Vol.20 No.2

          This study presents an 8x four-group inner-focus zoom lens with one-moving group for a compact camera by use of a focus tunable lens (FTL). In the initial design stage, we obtained the powers of lens groups by paraxial design based on thin lens theory, and then set up the zoom system composed of four lens modules. Instead of numerically analytic analysis for the zoom locus, we suggest simple analysis for that using lens modules optimized. After replacing four groups with equivalent thick lens modules, the power of the fourth group, which includes a focus tunable lens, is designed to be changed to fix the image plane at all positions. From this design process, we can realize an 8x four-group zoom system having one moving group by employing a focus tunable lens. The final designed zoom lens has focal lengths of 4 mm to 32 mm and apertures of F/3.5 to F/4.5 at wide and tele positions, respectively.

        • KCI등재

          Combined Effects of Physical Evidence and Functional Service at Bulgogi Restaurants on Customers' Store Image and Purchase Behaviors: Application of Video Scenario Technique

          Hwang,,Daye,Chang,,Hyeja Korean Society of Food Culture 2020 韓國食生活文化學會誌 Vol.35 No.2

          This study aimed to identify whether or not four service situations varying according to positive and negative combinations of physical evidence and functional service influence store image and purchase behavioral intentions of customers at bulgogi restaurants. The video-scenario technique was used for the study. Data were analyzed with the SPSS (Window 19.0) package using frequency analysis, one-way ANOVA, 2 by 2 factorial ANOVA, exploratory factor analysis, and multiple regression analysis to confirm the hypotheses. The combined effect of functional service and physical evidence influenced store image and purchase intention. In terms of seperate effect of physical evidence and functional service, the effect of employee service on store image was more powerful than that of physical evidence, even though the effect differed depending on the situation. Purchase intention was only influenced by functional service quality from employees under the four different scenarios. Thus, when opening a Korean restaurant, proper management of tangible evidence suitable to service, and the prices expected from local customers should be determined. Additionally, extremely high or low levels of physical evidence management should be avoided.

        • KCI등재

          스마트 폰 기반의 가정환경 내 사용자 공간 위치 예측 기법

          안다예(Daye Ahn), 하란(Rhan Ha) 한국통신학회 2014 韓國通信學會論文誌 Vol.39 No.4(융합기술)

          유비쿼터스 환경에서 실내 공간의 사용자 위치정보는 다양한 응용분야에서 사용자에 특화된 서비스를 제공하는데 필요한 필수적인 정보이기 때문에 매우 중요하다. 기존연구들은 규모가 큰 건물에서의 사용자 위치 예측만 고려하고 있고 실험 대상이 되는 공간에서 고정된 AP가 다수 존재한다고 가정한다. 그러나 일반 가정은 면적이 좁은 공간들로 구성되며 고정된 AP가 소수이고 변화가 유동적인 환경이다. 본 논문에서는 기존 연구들이 AP환경이 비교적 안정적인 큰 건물에서의 사용자 위치 예측에 집중한 것과 달리, 일반 가정환경에서 와이파이 핑거프린트 방식을 기반으로 하여 공간을 식별하고 사용자의 위치를 Room-level로 예측하는 사용자 공간 예측 시스템을 제안한다. 실제 가정에서 실험을 한 결과 제안하는 시스템이 모든 가정에서 평균 80%이상의 정확도로 사용자가 위치한 공간을 예측함을 알 수 있었다. In ubiquitous environment, User's location information is very important to serve personalized service to user. Previous works consider only User's locations in the big buildings and assume APs are fixed. Normal home environment, However, is consists of small spaces. And the state of APs is highly fluid. Previous research has focused on indoor localization in the building where has stationary AP environment. However, in this paper, we propose as User's Location Predicting System that finds out a space where a user is located based on Wi-Fi Fingerprint approach in home environments. The results that conducted real home environments are using the system show more than 80% accuracy.

        • SCIESCOPUSKCI등재

          FORECAST OF DAILY MAJOR FLARE PROBABILITY USING RELATIONSHIPS BETWEEN VECTOR MAGNETIC PROPERTIES AND FLARING RATES

          Lim,,Daye,Moon,,Yong-Jae,Park,,Jongyeob,Park,,Eunsu,Lee,,Kangjin,Lee,,Jin-Yi,Jang,,Soojeong The Korean Astronomical Society 2019 Journal of The Korean Astronomical Society Vol.52 No.4

          We develop forecast models of daily probabilities of major flares (M- and X-class) based on empirical relationships between photospheric magnetic parameters and daily flaring rates from May 2010 to April 2018. In this study, we consider ten magnetic parameters characterizing size, distribution, and non-potentiality of vector magnetic fields from Solar Dynamics Observatory (SDO)/Helioseismic and Magnetic Imager (HMI) and Geostationary Operational Environmental Satellites (GOES) X-ray flare data. The magnetic parameters are classified into three types: the total unsigned parameters, the total signed parameters, and the mean parameters. We divide the data into two sets chronologically: 70% for training and 30% for testing. The empirical relationships between the parameters and flaring rates are used to predict flare occurrence probabilities for a given magnetic parameter value. Major results of this study are as follows. First, major flare occurrence rates are well correlated with ten parameters having correlation coefficients above 0.85. Second, logarithmic values of flaring rates are well approximated by linear equations. Third, using total unsigned and signed parameters achieved better performance for predicting flares than the mean parameters in terms of verification measures of probabilistic and converted binary forecasts. We conclude that the total quantity of non-potentiality of magnetic fields is crucial for flare forecasting among the magnetic parameters considered in this study. When this model is applied for operational use, it can be used using the data of 21:00 TAI with a slight underestimation of 2-6.3%.

        • Application of MMP-7 and MMP-10 in Assisting the Diagnosis of Malignant Pleural Effusion

          Cheng,,Daye,Liang,,Bin,Li,,Yun-Hui Asian Pacific Organization for Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.2

          Background: Matrix metalloproteinases (MMP) are proteolytic enzymes that are essentially involved in turnover of the extracellular matrix (ECM). The aim was to investigate the diagnostic value of MMP-7 and MMP-10 as tumor markers in pleural effusion (PE) and evaluate the value of combining MMP-7, MMP-10 and carcinoembryonic antigen (CEA) assays as diagnostic aids for malignant cells. Materials and Methods: A total of 179 patients with PE (87 malignant and 92 benign) were included in this study. The levels of MMP-7 and MMP-10 were measured using ELISA. Results: Values for MMP-7 and MMP-10 were significantly higher in malignant PE than those in benign PE (P<0.01). Among all variables evaluated, logistic regression found that MMP-7 and MMP-10 were significantly correlated with the presence of malignant disease (P<0.01). Analysis of receiver operating characteristics (ROC) curves showed that the area under the curve of MMP-10 (0.806) was significantly larger than that of MMP-7 (0.771) and CEA (0.789) (P<0.01). With parallel interpretation, the combination of MMP-10 and CEA achieved the higher sensitivity of 94.6%. The combination of MMP-7 and CEA in serial interpretation was able to boost the specificity to 95.7%. The combination of MMP-7, MMP-10 and CEA produced better sensitivity, specificity, PPV and NPV than MMP-7 and MMP-10 alone. Conclusion: MMP-7 and MMP-10 in PE may represent helpful adjuncts to conventional diagnostic tools in ruling out malignancy as a probable diagnosis, thus guiding the selection of patients who might benefit from further invasive procedures.

        • 달천 홍수 회복 탄력성 지표의 산정

          김다예 ( Daye Kim ), 박수희 ( Suhee Park ), 황주하 ( Juha Hwang ), 맹승진 ( Seungjin Maeng ) 한국농공학회 2019 한국농공학회 학술대회초록집 Vol.2019 No.-

          우리나라의 연평균 강수량은 세계 평균에 비해 비교적 많은 편이며, 계절의 특수성으로 인해 연평균 강수량의 절반 이상이 여름에 집중되는 특성을 보인다. 또한 기후변화로 인해 국지성 호우의 발생빈도가 증가하고 있다. 이로 인해 우리나라의 홍수 발생률이 증가하고 있으며, 하천 주변의 저지대와 가옥, 농경지 등이 침수되어 재산과 인명에 큰 피해를 발생시켰다. 홍수 피해는 도시와 농촌을 가리지 않고 발생하는 실정이며, 특히 대다수의 홍수 피해는 농촌에서 발생하고 있다. 2017년 괴산군에서 발생한 수해 사례를 보면 1시간 동안 약 59mm의 강우가 집중되어 달천의 상·하류 주변으로 침수 피해가 발생하였고 현재까지 피해 복구가 제대로 되고 있지 않는 상황이다. 우리나라에서는 현재 홍수 피해 대책으로 시설 복구에 치중하고 있어 홍수 피해를 빠르게 회복할 수 없는 실정이기 때문에 홍수 취약성을 줄이고 홍수 발생 전 상태로 돌아갈 수 있는 복원력이 필요하다. FRI는 이러한 홍수 회복탄력성(Flood Resilience)의 평가를 수행하기 위해 사용되어 왔으며, 농촌지역이 아닌 도시지역을 중심으로 적용 되어왔다. 상대적으로 농촌에 대한 홍수 회복탄력성 적용이 전무한 실정이므로, 도시뿐만 아니라 농촌에서도 체계적이고 효율적인 홍수 피해 복구와 관리를 위하여 FRI의 도입과 홍수 회복 탄력성(Flood Resilience) 평가의 적용이 필요로 한다. 따라서 본 연구에서는 홍수 회복탄력성 평가와 산정을 위해 2017년 괴산댐 상류의 달천 홍수피해를 대상으로 홍수량은 HEC-HMS에 의해 산정하고, 수리학적 해석은 HEC-RAS와 MIKE 21에 의해 분석하였다. 적용된 3개의 모형과 Arc-GIS를 통해 홍수범람지도를 표현 후 달천의 Flood Resilience Index(FRI)를 산정하였다. 산정한 FRI의 값은 도시뿐만 아니라 농촌지역의 홍수피해 회복력에도 적용되고 활용 가능한 방법을 제시하였다.

        • KCI등재

          Combined Effects of Physical Evidence and Functional Service at Bulgogi Restaurants on Customers' Store Image and Purchase Behaviors: Application of Video Scenario Technique

          Daye,Hwang,Hyeja,Chang 한국식생활문화학회 2020 韓國食生活文化學會誌 Vol.35 No.2

          This study aimed to identify whether or not four service situations varying according to positive and negative combinations of physical evidence and functional service influence store image and purchase behavioral intentions of customers at bulgogi restaurants. The video-scenario technique was used for the study. Data were analyzed with the SPSS (Window 19.0) package using frequency analysis, one-way ANOVA, 2 by 2 factorial ANOVA, exploratory factor analysis, and multiple regression analysis to confirm the hypotheses. The combined effect of functional service and physical evidence influenced store image and purchase intention. In terms of seperate effect of physical evidence and functional service, the effect of employee service on store image was more powerful than that of physical evidence, even though the effect differed depending on the situation. Purchase intention was only influenced by functional service quality from employees under the four different scenarios. Thus, when opening a Korean restaurant, proper management of tangible evidence suitable to service, and the prices expected from local customers should be determined. Additionally, extremely high or low levels of physical evidence management should be avoided.

        • KCI등재

          Value of clay as a supplement to swine diets

          Daye,Mun,Jongmoon,Lee,Jeehwan,Choe,Byeonghyeon,Kim,Sangnam,Oh,Minho,Song 충남대학교 농업과학연구소 2017 Korean Journal of Agricultural Science Vol.44 No.2

          The use of practical management factors to maximize pig health improvement cannot guarantee freedom from diseases. Moreover, because of health safety concerns, the use of antibiotics has been restricted in livestock, including pigs. Therefore, the swine industry has been looking for various alternatives to antibiotics to improve pig's health and performance. Clay is a dietary factor generally accepted for improving pig health. It is a naturally occurring material and is primarily composed of fine-grained minerals. It has a specific structure with polar attraction. Because of this structure, clay has the ability to lose or gain water reversibly. In addition, clay has beneficial physiological activities. First, clay has anti-diarrheic and antibacterial effects by penetrating the cell wall of bacteria or inhibiting their metabolism. Second, it can protect the intestinal tract by absorbing toxins, bacteria, or even viruses. When added to the diet, clay has also been known to bind some mycotoxins, which are toxic secondary metabolites produced by fungi, namely in cereal grains. Those beneficial effects of clay can improve pigs' health and performance by reducing pathogenic bacteria, especially pathogenic Escherichia coli, in the intestinal tract. Therefore, it is suggested that clay has a remarkable potential as an antibiotics alternative.

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