• Journal of The Korean Society of Agricultural Engineers
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• v.52 no.5
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• pp.27-35
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• 2010

The characteristics of delivered nutrient loads were analyzed and the regression equations to estimate delivery ratios of nutrients (TN and TP) were developed using HSPF simulation results at six subwatersheds within the Bochung A unit watershed during 1998-2007. TN delivery ratio was higher than TP delivery ratio because significant amounts of TP was considered to be attached at soil as ${PO_4}^-$ during delivery process from discharged point of nutrient source to main stream. As a results of correlation analysis, factors related to geomorphic characteristics had not statistical correlation with TN and TP delivery ratios. TN loading rate from living and specific stream flow had statistical negative and positive correlation, respectively, with TN delivery ratio. TP loading rates from all sources and from land cover and specific stream flow had statistical negative, negative and positive correlation, respectively. The specific stream flow represents the most strong correlation with nutrient delivery ratios. The regression equations to estimate delivery ratios for TN and TP were developed by including statistical correlated factors and showed high efficiency of 0.98 and 0.95 of coefficient of determination for TN and TP, respectively.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.15 no.2
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• pp.73-80
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• 2006

This paper describes a analysis on the chip thickness model required for cutting force simulation in ball-end milling. In milling, cutting forces are obtained by multiplying chip area to specific cutting forces in each cutting instance. Specific cutting forces are one of the important factors for cutting force predication and have unique value according to workpiece materials. Chip area in two dimensional cutting is simply calculated using depth of cut and feed, but not simply obtained in three dimensional cutting such as milling due to complex cutting mechanics. In ball-end milling, machining is almost performed in the ball part of the cutter and tool radius is varied along contact point of the cutter and workpiece. In result, the cutting speed and the effective helix angle are changed according to length from the tool tip. In this study, for chip thickness model analysis, tool and chip geometry are analyzed and then the definition of chip thickness and estimation method are described. The resulted of analysis are verified by compared with geometrical simulation and other research. The proposed chip thickness model is more precise.

• Korean Journal of Acupuncture
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• v.25 no.1
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• pp.61-71
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• 2008

Objectives : The aim of this study was to show the rationale of point-selection on the methods of acupuncture and moxibustion in the Rhinological section(in the Oehyeong chapter) of the Dong Ui BO Gam. Methods : First, We summarized the cause of each disease in the Rhinological section(in the Oehyeong chapter) of the Dong Ui BO Gam. Then, We explained the rationale of acupoint-selection referring to the cause of disease, physiology of the Oriental medicine, other uses of each acupoints in the Dong Ui BO Gam, character of each acupoints, flow of meridian pathways and specific acupoints etc. Results and Conclusions : Total 15 acupoints were used in the Rhinological section(in the Oehyeong chapter) of the Dong Ui BO Gam. Most of acupoints were specific acupoints. But, some rationale of acupoint-selection were explained by the cause of disease, physiology of the Oriental medicine, other uses of each acupoints in the Dong Ui BO Gam, flow of meridian pathways etc.

• Korean Journal of Acupuncture
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• v.25 no.1
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• pp.73-83
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• 2008

Objectives : The aim of this study was to show the rationale of point-selection on the methods of acupuncture and moxibustion in the Ear Section (in the Oehyeong Chapter) of the Dong Ui Bo Gam. Methods : First, We summarized the cause of each disease in the Ear Section (in the Oehyeong Chapter) of the Dong Ui Bo Gam. Then, We explained the rationale of acupoint-selection referring to the cause of disease, physiology of the Oriental medicine, other uses of each acupoints in the Dong Ui Bo Gam, character of each acupuncture points, flow of meridian pathways and specific acupoints etc. Results and Conclusions : Total 23 acupoints were used in the Ear Section (in the Oehyeong Chapter) of the Dong Ui Bo Gam. Most of acupoints were specific acupuncture points. But, some rationale of acupoint-selection were explained by the cause of disease, physiology of the Oriental medicine, other uses of each acupoints in the Dong Ui Bo Gam, flow of meridian pathways etc.

• Journal of Information Technology Services
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• v.16 no.4
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• pp.1-13
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• 2017

This study examines how specific technology from Information and Communications Technology (ICT)-which plays a critical role in increasing productivity by promoting a spread of technology across the society though the use of big data, mobile or wearable devices-impacts of the productivity of society and productivity of added values, respectively. The impact of technology was studied from the perspective of efficiency levels of input. In order to provide an analysis, we have categorized ICT into 16 specific technologies and have set the number of companies and number of employees each as an input factor while setting the respective output and the output of added values as an output factor. Afterwards, we have applied data envelopment analysis (DEA) which is a form of nonparametric frontier analysis and measured the productivity and efficiency of added values for each technology. According to the analysis results, there were 2 technologies by the CRS standards, and 3 technologies by the VRS standards that showed relative efficiency levels. We have also presented some efficiency improvement strategies for specific technologies that revealed relative inefficiency and offered a reference set and projection point. In addition, we provide an analysis on scale efficiencies (SE), diminishing returns to scale (DRS), and increasing returns to scale (IRS) of each ICT.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.14 no.4
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• pp.421-430
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• 2003

In this paper, we propose a method to consider SAR(Specific Absorption Rate) at beginning stage of handsets development. First, simulation was carried out with changing folding angle from 150$^{\circ}$to 142$^{\circ}$. Simulation results show that SAR value is decreased with decreasing the folding angle. When folding angle is 142$^{\circ}$, error between simulation and measurement results is about 3.95 %. Second, we made some experiments with EMI (Electromagnetic Interference) paint, and its results show that different pattern of EMI paint have different SAR values. After removing EMI paint at the lower part of antenna feeding point, we got the decrease efficiency of 15.46 % for SAR value. When we applied zigzag painting pattern, we got the highest SAR decrease efficiency.

• Journal of Plant Biology
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• v.2 no.1
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• pp.35-42
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• 1959

The cuttings and apical portion of stein in sweet potato were growlh under artificial light and specific photoperied and temperature. Though the plant growth was poor under insufficient light intensity of artificial light, the tuber formations were induced at long light period (16L+8D) and not induced at short light period (8L+16D) and low temperature of darkparied. The determinative factor for tuber formation of sweet potato seems to be a stimulation which has intimate relationship with specific photoperiod and temperature and no direct relation with the growth of plant body and light intensity. The root pattern of inductive state for tubers and non-inductive state were different distinctly, the former were silky and slender, the latter were branchy, and stout appearence. This different root pattern must be due also to the specific photoperiod and temperature and may have any relationship with the stimulation for tuber formation from the point of auxin physiology etc.

• The KSFM Journal of Fluid Machinery
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• v.15 no.5
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• pp.27-31
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• 2012

Turbine inlet temperature is steadily increasing to achieve high specific thrust and efficiency of gas turbine engines. Turbine cooling technology is essential to increase turbine inlet temperature. For this study, a small or medium sized aircraft engine of 10,000 lbf class with the turbine inlet temperature of $1,400^{\circ}C$, the engine overall pressure ratio of 32.2, and the bypass ratio of 5 was set as the baseline model and its performance analysis was performed at the design point. The engine has the performance of 10,013 lbf thrust and the specific fuel consumption of 0.362 lbm/hr/lbf. The thrust and the specific fuel consumption of the baseline model were compared with those of similar class engines. Based on these results, the turbine design requirements were assigned. In addition, the parametric analysis of the engine, related to aerodynamic and cooling design of the high pressure turbine, was performed. Based on the baseline model engine, the influence of turbine inlet temperature, cooling flow ratio, and high pressure turbine efficiency variations on the engine performance was analyzed.

• Journal of Acupuncture Research
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• v.17 no.3
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• pp.168-175
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• 2000

Stimulation of the auricle is known to be effective in reducing obesity. The aim of the present study is to investigate whether stimulating a specific auricular acupuncture point is effective on suppression of appetite. Cholesystokinin (CCK) is known to induce a powerful feeding response after central administration and particularly abundant in the cerebral cortex. In food-deprived rats exhibiting a strong drive for feeding, decreased CCK release was markedly detected in the cerebral cortex of the brain. Needling the fasted rats on the specific auricular region increased the CCK level of the cerebral cortex. In conclusion, stimulating the specific auricular points increases CCK-expression in the cerebral cortex of the fasted rats and may be useful for controlling obesity.

• Bulletin of the Korean Chemical Society
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• v.30 no.2
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• pp.323-326
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• 2009

SR proteins are essential splicing regulators and also modulate alternative splicing events, which function both as redundant and substrate-specific manner. The Drosophila B52/SRp55, a member of the SR protein family, is essential for the fly development in vivo, as deletion of B52 gene results in lethality of animals at the second instar larval stage. Identification of the splicing target genes of B52 thus should be crucial for the understanding of the specific developmental role of B52 in vivo. In this study, we performed whole-genome DNA microarray experiments with a B52- knock-out animal. Analysis of the microarray data not only provided the B52-dependent gene expression signature, but also revealed a larval-stage specific, alternative splicing target gene of B52. Our result thus provides a starting point to understand the essential function of B52 at the organismal level.