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김상균,박세명,최흥국,최항묵 인제대학교 1998 仁濟論叢 Vol.14 No.1
Extracting a license plate is an essential stage in the automatic car identification. Because car images are usually degraded and processes for the images are a computationally intensive job, it is difficult to extract a license plate correctly from the images. In this paper, we propose an extraction method of a license plate region based on color image segmentation. To segment the color image, we use a distributed genetic algorithm and transformed Hue-Saturation-Intensity color space as a measure of distance. The method offers robustness in dealing with deformation of car images and inherent parallelism to improve processing time. A test with car images on the roads shows an extraction rate of 93.8%. This result suggests that the proposed method works well with real-world situations, and is pertinent to be put into practical use.
신흥묵,金吉萱 東國大學校韓醫學硏究所 1993 東國韓醫學硏究所論文集 Vol.2 No.1
This study is to know the concept and function of Vital Gate. The results are summarized as follows, 1. Vital Gate is the original of life, which is essential to life. 2. A physiological function if Vital Gate controls the physiological activity of the whole body through Triple Heater. 3. It is said that a partial establishment of Vital Gate is the concept of Hwang jeong(黃庭) as the central point of the body. 4. It is effective that a clinical application of Vital Gate uses on the basis of Zoagyuyeum(左歸飮) and Woogyuyeym(右歸陰). 5. Fire of the Vital Gate means a original activity of life-activity and is different from the concept of the fire of Pericardium as a substitute for King Fire. 6. It is said that to explain the essence of Vital Gate in relation of kidney is to say the generative function. According to the above results, Vital Gate is understood as the control of physiological activity of the whole body as the original point of life-activity.
Ethanol-유도 위점막손상에 대한 葛花解酊湯의 항산화 효과
신흥묵,김길훤,이규현 東國大學校 1998 東國論叢 Vol.37 No.-
Oxygen radicals are associated with organ injury in a wide spectrum of human disease. Ethanol-induced experimental gastric injury may also involve the generation of oxygen radicals. This Study was carried out to investigate the antioxidant effects of GalHwaHaJungTang(GHT) on the gastric lesions induced by ethanol in rats. Rats were pretreated with GHT extract 1.7㎖/kg, 3.4㎖/kg, 5㎖/kg respectively, 30min prior to exposing the stomach to 100% ethanol. The animals were killed lhr after ethanol treatment. Ethanol treatment increase lipid peroxidation catalase(CAT) levels and decreased superoxide dismutase(SOD), glutathione(GSH). On the other hand pretreatment of GHT extract significantly inhibited ethanol-induced lipid peroxidation and also induced an increase of activity of SOD, CAT and GSH levels. These results suggest that antioxidant activities of GHt are effective in prevent of ethanol-induced gastric lesions formation, and more study are required.
화목피 추출물이 Streptozotocin 으로 유발시킨 흰쥐의 당뇨와 Free Radical 에 미치는 효과
임병우,서태원,신흥묵,박동기,김선여,조금호,김호철 대한본초학회 2000 大韓本草學會誌 Vol.15 No.2
Type I diabetes is caused by destruction of the pancreatic beta cells responsible for insulin-secretion. It can be induced by the drugs alloxan or streptozotocin (STZ). Both an increase in reaction oxygen free radical species and a decrease in the antioxidant defense mechanism lead to the increase in oxidative stress in diabetes mellitus. Oxygen radicals scavengers are effective in preventing diagetes in animal models. Experiments were conducted by two system. The Sprague-Dawley rats were treated with STZ intravenous injection after oral administrated Betula's extract and quercetin for a week, and were administrated them for a week. In vitro, Betula's extracts and quercetin showed a tendency towards inhibition of free radical oxidation in all. In vivo, Betula's extracts group exhibited suppression morphologic change in pancreatic islet compare quercetin group on light microscopy. The Betula's extract significantly inhibited formation of MDA compared to the STZ-induced diabetic group in pancreas.They also significantly inhibited formation of Phosphatidylcholine hydroperoxide(PCOOH) compared to the STZ-induced diabetic group in pancreas and plasma, which considered defense against destruction in beta cells. The protection by Betula's extracts may be due to scavenging of deleterious and highly reactive free radical which is generated by STZ. In streptozotocin-induced diabetic rats, the effect of Betula's extract are greater than that of quercetin. Based on this result, we concluded that Betula's extract has the ability to effectively suppress in vitro and in vivo oxidation, thereby providing additional evidence for their potential beneficial type I diabetes.
Kim, Chul-Heung,Lee, Soochang,Woo, Sung Yun,Kang, Won-Mook,Lim, Suhwan,Bae, Jong-Ho,Kim, Jaeha,Lee, Jong-Ho IEEE 2018 IEEE transactions on electron devices Vol.65 No.5
<P>We investigate the characteristics of a synaptic imitation device using a thin-film transistor (TFT)-type NOR flash memory cell with a half-covered floating gate. The long-term potentiation (LTP) and long-term depression (LTD) required for the operation of the spike-timing-dependent plasticity (STDP) algorithm are implemented using the proposed pulse scheme. Unsupervised learning is successfully demonstrated by applying the STDP learning rule through software MATLAB simulation reflecting the LTP/LTD characteristics of the fabricated TFT-type NOR flash memory array. We present the learning and recognition processes of <TEX>$28\times28$</TEX> MNIST handwritten digit patterns. First, STDP learning in a single-neuron string ( <TEX>$784\times1$</TEX>) is investigated, after which STDP learning is demonstrated in a multineuron array ( <TEX>$784\times10$</TEX>) with a lateral inhibition function to demonstrate the ability of multipattern learning and recognition. Meanwhile, we investigate the key factors of STDP unsupervised learning. Finally, an approach is suggested to implement a hardware neural network using the conventional CMOS technology for STDP unsupervised learning as a visual pattern recognition system.</P>
Emerging memory technologies for neuromorphic computing
Kim, Chul-Heung,Lim, Suhwan,Woo, Sung Yun,Kang, Won-Mook,Seo, Young-Tak,Lee, Sung-Tae,Lee, Soochang,Kwon, Dongseok,Oh, Seongbin,Noh, Yoohyun,Kim, Hyeongsu,Kim, Jangsaeng,Bae, Jong-Ho,Lee, Jong-Ho IOP 2019 Nanotechnology Vol.30 No.3
<P>In this paper, we reviewed the recent trends on neuromorphic computing using emerging memory technologies. Two representative learning algorithms used to implement a hardware-based neural network are described as a bio-inspired learning algorithm and software-based learning algorithm, in particular back-propagation. The requirements of the synaptic device to apply each algorithm were analyzed. Then, we reviewed the research trends of synaptic devices to implement an artificial neural network.</P>
A Novel Distributed Translator for an ATSC Terrestrial DTV System
Heung Mook Kim,Sung Ik Park,Ho Min Eum,Jae Hyun Seo,Hyuckjae Lee IEEE 2013 IEEE transactions on broadcasting Vol.59 No.3
<P>This paper presents a new design and implementation method of distributed translator (DTxR), termed the equalization DTxR (EDTxR), for distributed translator network in ATSC systems. EDTxR has a simple structure and does not require any devices to be added to studio or transmitter facilities already deployed. EDTxRs which retransmit the same transmitter signal can have identical output symbol streams among them without additional synchronization information by utilizing the structure of the equalization digital on-channel repeater (EDOCR). Moreover, they can synchronize output frequency among them without global positioning system (GPS) clock receivers by adopting a crystal oscillator for each translator and compensating the frequency offset of the each crystal oscillator through the carrier and timing recovery. To verify the proposed method, multiple EDTxRs are implemented and tested in the laboratory and in the field. Through the tests, it is confirmed that EDTxR is a simple and economic distributed translator for distributed transmission system which does not need additional synchronization devices. Therefore, EDTxR can be a promising translator for coverage extension of digital terrestrial television broadcasting under spectrum deficient situations.</P>