Daegu, South Korea
Daegu, South Korea

Keimyung University is a private university in South Korea. The university was founded in 1954 by the leaders of the Northern Presbyterian Church of the U.S. as a Christian university. Its motto is 'For the Kingdom of Truth, Justice and Love'. KMU is composed of three campuses in the city of Daegu, South Korea. They are named for their locations within the city; Daemyeong, which is near the downtown area, Seongseo, which is in the western part of the city, and also Dongsan campus which includes Dongsan Medical Center. Wikipedia.

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Disclosed herein is a method for predicting a chlorophyll-a concentration in a river using satellite image data and a nonlinear RANSAC method. In detail, the method includes (1) receiving a chlorophyll-a concentration, which was actually measured at a measurement station at a prescribed basin and an image from a satellite on a same date and at a same site as when and where the chlorophyll-a concentration was measured at the measurement station, (2) correcting a distortion of the image received from the satellite, (3) applying the chlorophyll-a concentration actually measured at the measurement station and data of the corrected satellite image to a nonlinear RANSAC method to extract a second-order function, and (4) inputting corrected data of a satellite image collected at the prescribed basin to the extracted second-order function to predict a chlorophyll-a concentration at the prescribed basin.

Kundu J.K.,Keimyung University | Surh Y.-J.,Seoul National University
Free Radical Biology and Medicine | Year: 2012

The role of inflammation in carcinogenesis has been extensively investigated and well documented. Many biochemical processes that are altered during chronic inflammation have been implicated in tumorigenesis. These include shifting cellular redox balance toward oxidative stress; induction of genomic instability; increased DNA damage; stimulation of cell proliferation, metastasis, and angiogenesis; deregulation of cellular epigenetic control of gene expression; and inappropriate epithelial-to-mesenchymal transition. A wide array of proinflammatory cytokines, prostaglandins, nitric oxide, and matricellular proteins are closely involved in premalignant and malignant conversion of cells in a background of chronic inflammation. Inappropriate transcription of genes encoding inflammatory mediators, survival factors, and angiogenic and metastatic proteins is the key molecular event in linking inflammation and cancer. Aberrant cell signaling pathways comprising various kinases and their downstream transcription factors have been identified as the major contributors in abnormal gene expression associated with inflammation-driven carcinogenesis. The posttranscriptional regulation of gene expression by microRNAs also provides the molecular basis for linking inflammation to cancer. This review highlights the multifaceted role of inflammation in carcinogenesis in the context of altered cellular redox signaling. © 2012 Elsevier Inc. All rights reserved.

This study investigated the effects of synthetically designed diesel fuel properties i.e. cetane number (CN), aromatic content, and 90% distillation temperature (T90) on the combustion characteristics and exhaust emissions in low-temperature diesel combustion (LTC). LTC was achieved by a similar approach to previous work via alteration of injection strategy, a cooled heavy EGR rate at low speed and low load, and at 1500 rpm and 2.6 bar BMEP in a 1.9 L common rail direct injection diesel engine. The test fuels were synthetically designed, whose properties constitute CNs of 30 and 55, aromatic contents of 20% and 45%, and T90 temperatures of 270 and 340°C. In LTC operating conditions, the CN is found to be the most dominant factor in the ignition delay time, followed by the T90 temperature for the lower CN fuels, and the aromatic content for the higher CN fuels. Given a CN, the location of mass fraction burned (MFB) 5% and MFB50% showed a linear relationship, and thus the aromatic content and T90 temperature effects can be diminished by adjusting the start of injection timing. PM was strongly dependent on the ignition delay time regardless of fuel types: no PM was observed as long as the ignition delay time was longer than 18°CA. For CN55 fuels, the NOx emission showed strong dependence on the location of MFB50% regardless of fuel types, i.e. NOx decreases as the MFB50% location retards. For CN30 fuels, the aromatic content acts as a crucial factor in the increase of NOx as similar to the studies of conventional diesel combustion. © 2013 Elsevier Ltd. All rights reserved.

Song K.-S.,Keimyung University
Journal of Bone and Joint Surgery - Series B | Year: 2010

We have investigated whether early anatomical open reduction and internal fixation (ORIF) reduces the incidence of complications of fracture of the femoral neck in children, including avascular necrosis, compared with closed reduction and internal fixation (CRIF). We retrospectively reviewed 27 such fractures (15 type-II and 12 type-III displaced fractures) in children younger than 16 years of age seen in our hospital between February 1989 and March 2007. We divided the patients into three groups according to the quality of the reduction (anatomical, acceptable, and unacceptable) and the clinical results into two groups (satisfactory and unsatisfactory). Of the 15 fractures treated by ORIF, 14 (93.3%) had anatomical reduction and reduction was acceptable in one. Of the 12 treated by CRIF, three (25.0%) had anatomical reduction, eight had acceptable reduction (66.7%), and one (8.3%) unacceptable reduction. Of the 15 fractures treated by ORIF, 14 (93.3%) had a good result and one a fair result. Of the 12 treated by CRIF, seven (58.3%) had a good result, two (16.7%) a fair result and three (25.0%) a poor result. There were seven complications in five patients. ORIF gives better reduction with fewer complications, including avascular necrosis, than does CRIF in fractures of the femoral neck in children. ©2010 British Editorial Society of Bone and Joint Surgery.

Kim K.,Keimyung University
Environmental Research | Year: 2012

Although animal experiments have shown that cadmium exposure induces alterations in lipid profiles, no epidemiological study of this relationship has been performed. The objective of this study was to evaluate the association between blood cadmium concentration and blood lipid levels in Korean adults. A cross-sectional study comprising participants (n=3903) aged 20 years or older from the 2005, 2008, and 2009 Korea National Health and Nutrition Examination Surveys was conducted. Demographic characteristics and dietary intake were obtained from the participants by questionnaire, and cadmium and lipid levels were determined by analysis of blood samples. After adjusting for demographic and dietary factors, blood concentration of cadmium was positively associated with the risk of low high-density lipoprotein cholesterol (HDL-C) in a dose-dependent manner (p for trend <0.001). In addition, the odds ratios (ORs) of a high triglyceride to HDL-C ratio was significantly increased in the high blood cadmium groups [OR=1.36; 95% confidence interval (CI), 1.03-1.79 for fourth quintile and OR=1.41; 95% CI, 1.07-1.86 for fifth quintile] compared with the lowest quintile group. However, high blood cadmium was not associated with a risk of high total cholesterol, high low-density lipoprotein cholesterol, or high triglycerides. These data suggest that an increased cadmium body burden increases the risk of dyslipidemia, mainly due to the increased risk of low HDL-C and the high ratio of triglycerides to HDL-C. © 2011 Elsevier Inc.

Disclosed is a method for manufacturing a SiO_(2)/carbon nanofiber composite on the basis of a nickel/copper catalyst using electrophoretic deposition, and a method for manufacturing a secondary battery using the same as an anode material. The method for manufacturing a SiO_(2)/carbon nanofiber composite on the basis of a nickel/copper catalyst using electrophoretic deposition including: depositing a nickel (Ni) and copper (Cu) catalyst on a carbon fiber textile by electrophoretic deposition using a carbon electrode as an anode and the carbon fiber textile as a cathode; reducing the carbon fiber textile on which the nickel and copper catalyst is deposited; growing carbon nanofiber on the reduced carbon fiber textile to by chemical vapor deposition using an ethylene gas; and coating the grown carbon nanofiber with SiO_(2).

The treatment for chronic hepatitis C (CHC) is removal of the virus in order to prevent progression to liver cirrhosis and hepatocellular carcinoma (HCC). Few data have been presented regarding the clinical significance of changes in the alanine aminotransferase (ALT) level in this context. We analyzed the patterns of changes in ALT level and investigated the relationship between the rapid normalization of ALT and sustained virologic response (SVR) after combined treatment with peginterferon and ribavirin. CHC patients (n=370) were classified into four groups according to the initial ALT level and subsequent changes: (1) initially abnormal ALT level and sustained abnormal ALT level during treatment, (2) initially abnormal ALT level but achievement of ALT normalization, (3) initially normal ALT level and variable ALT abnormality during treatment, and (4) initially normal ALT level and sustained normalization of ALT level during treatment. We subdivided groups 1 and 2 into those with patterns of decreased and normalization of ALT, with or without rapid normalization. We checked the end-treatment response (ETR) and SVR rates in each group and the factors associated with SVR, including patterns of changes in ALT level. A total of 168 patients completed the therapy (age=54.34±10.64 years [mean±SD], 95 males [56.5%], genotype 1:82 [48.8%]). SVR was achieved in 115 (68.45%) of the completely treated patients. The SVR rate was significantly lower in group 1 than in group 2 (37.8 vs. 81.6%, P<0.001), and significantly higher in the rapid normalization group than in the group without rapid normalization (78.5% vs. 41.2%, P<0.001). Multiple logistic regression analysis revealed that age (odds ratio [OR]=0.94, 95% confidence interval [CI]=0.91-0.98, P=0.005), viral genotype (OR=2.76, 95% CI=1.20-6.38, P=0.017), and initial hepatitis C virus RNA titer (OR=0.28, 95% CI=0.10-0.75, P=0.012) were identified as independent significant predictive factors for SVR. The SVR rate is significantly associated with normalization, and especially rapid normalization of ALT. Rapid normalization of ALT by 4 weeks after treatment might be a useful response factor that is readily available in clinical practice, and especially for genotype 1 patients.

Daegu University, Myongji University, Korea Institute of Science, Technology and Keimyung University | Date: 2014-08-26

Disclosed herein is a bioenergy production system with reduced carbon dioxide emissions and process wastes; including a process for producing a bioalcohol and a biogas by subjecting a biomass, such as: herbaceous and woody plants, fruit pulp, freshwater and sea algae, grains, aerobic and anaerobic sludge, saccharides, polyols and carbohydrates, to a combined process of a biosaccharification/alcohol fermentation, including a biomass pretreatment process; and a process for producing a methane biogas with a reduced level of carbon dioxide and hydrogen sulfide, via an algae cultivation process with a view to purifying the carbon dioxide and hydrogen sulfide contained in the biogas; wherein, when the algae to be cultivated is microalgae, biodiesel is produced by subjecting the harvested microalgae to a biodiesel manufacturing process while recycling the glycerol and the saccharide-containing waste produced as byproducts to the biosaccharification/alcohol fermentation process, and when the algae to be cultivated is macroalgae the harvested macroalgae is recycled to the biosaccharification/alcohol fermentation process. The method of the present invention is effective in reducing carbon dioxide emissions, a representative green house gas contributing to the global warming, and also in optimizing a zero-waste bioenergy production system.

A method of detecting the smoke of a forest fire using the spatiotemporal Bag-of-Features (BoF) of the smoke and a random forest is provided. In the method, whenever each frame of a video sequence is input, a difference between the input frame and a previous frame is detected, and the input frame is set as a key frame if the difference exceeds a predetermined first threshold value. One or more moving blocks are detected in the set key frame. One or more candidate smoke blocks are extracted from the moving blocks using a smoke color model. BoF representations are generated from the detected candidate smoke blocks. Whether smoke of the candidate smoke blocks is actual smoke is determined by performing random forest learning on the generated BoF representation.

Keimyung University | Date: 2014-01-27

Disclosed is an implantable wireless electrocardiogram sensor device, including: a cylindrical capsule provided with four recesses on a lateral surface thereof in a longitudinal direction thereof at equal intervals; electrodes installed on upper and lower surfaces of the cylindrical capsule and configured to measure electrocardiogram; a wireless electrocardiogram sensor module installed inside the capsule; a data transceiving antenna wound around two recesses symmetrical at a center; and a coil for charging wound around the remaining two recesses in a direction vertical to the antenna.

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