광주 신창동유적 : 제1차조사개보

조현종,장제근 한국고고미술연구소 1992 고고학지 Vol.4 No.-

이 글은 국립광주박물관이 광주시의 의뢰를 받아 실시한 광주 신창동 소재 유적에 대한 조사 약보(略報)이다. 유적은 광주-장성을 잇는 국도확포장구간에 포함되었고 공사의 진척에 따라 유적 일부가 잘려나가는 상황에 놓이게 되었다. 특히 유적 일대의 충적 저지대에서는 공사로 인해 패인 지표하 2m 정도의 깊이에 있는 황갈색 사질층과 흑갈색 진흙층에서 볍씨와 탄화미(炭化米) 등이 곡물자료와 함께 일부 가공흔이 나타나는 목재류 등이 채집되었다. 이에 광주박물관은 광주시 등 관계기관과 협의하여 1차로 공사구간에 대한 유구확인을 위한 발굴조사를 실시하게 되었다. 조사는 1992년 6월 26일부터 7월 25일까지 이루어졌다. 그 결과 국내에서는 처음으로 목제 농기구가 출토된 소택지(沼澤地)의 존재가 알려졌으며 이와 함께 초기철기시대에서 원삼국시대에 이르는 것으로 생각되는 토기요지·구상유구(溝狀遺構)·조상유구(條狀遺構)·주거지 등이 확인되었다. 소위 소택지에서는 흑도(黑陶)·고배(高杯)·점토대토기(粘土帶土器) 등 각종 토기류와 함께 칠기고배, 빗(櫛), 검파(劍把), 통발 등 다양한 목제유물과 볍씨 등 탄화미를 비롯한 곡물자료가 발견되었다. 특히 칠기고배를 비롯한 칠기 등과 목제유물은 지금까지 창원 다호리를 비롯한 영남지방에서는 드물게나마 출토된 바 있으나 한반도 서남부지역에서는 초출(初出)의 자료로서 시사되는 바 크다. 또한, 주거지를 제외한 각 유구에서 출토된 토기류의 형태적 특징에서 요지 출토품과 유사성이 인정됨으로써 당시의 생산과 유통에 관한 새로운 인식의 계기를 마련해 주고 있다. 이러한 물질자료들은 유적의 극히 일부에서 출토된 것이지만 아직 밝혀지지 않은 이 시기의 생산양식과 농경문화의 구체적인 실체에 접근하는 데 필요한 하나의 수확이며 고환경의 복원 및 문화발전과 전파문제의 해석에도 많은 도움이 될 것이다. The Shinchang-dong site in Gwangju, Jeollanam-do Province, was excavated by the Gwangju National Museum in 1992, prior to the construction of the national road. The excavation revealed a peat bog, a pottery kiln, a ditch-shaped feature, a dry field-like feature and a dwelling house. Among the materials recovered from the peat bog were 1) lacquer wares and wooden artefacts including a hoe, mounted dishes, a comb, a dagger handle, basketry fish traps, bird's head-shaped scuplture, and various tools for woodworking, 2) potteries including plain-coarse pottery, black-burnished pottery, and pottery with clay stripe along the rim, the shapes of which are mounted dishes, long-necked jars, wide-mouthed bowls, dish-shaped covers and steamers, 3) organic remains including grains and seeds of rice, barley, wheats, cucumber, legumes and apricots, walnut shells, fish bones and snails, 4) accumulations of large quantities of rice husks. Many wooden pieces, planks and tools with some indications of woodworking as well as the existence of posts for hanging wooden implements indicate the use of swamp as the place for woodworking. The pottery kiln was dug in the direction of contour. Its size is 8m in length by 2m in width, and the slopeness of the floor is 5~8°. It is a open kiln without any additional structure such as roof, wall and combustion chamber. The potteries found from the kiln are similar to those from the bog site. The floor plan of dwelling site is a rectangle about 430cm by 320cm, in the depth of 20cm. It has a central hearth in an oval shape, 50cm in diameter. The peat bog, the kiln and other features date to about the late 2nd century B.C. or the 1st century B.C. while the dwelling site dates to the 3rd century AD. Recognizing the importance of the site, it is designated as the NATIONAL HISTORIC SITE NO. 375.

Effect of <i>Betula platyphylla</i> var. <i>japonica</i> on Proteoglycan Release, Type II Collagen Degradation, and Matrix Metalloproteinase Expression in Rabbit Articular Cartilage Explants

Cho, Yoon-Je,Huh, Jeong-Eun,Kim, Deog-Yoon,Kim, Nam-Jae,Lee, Jae-Dong,Baek, Yong-Hyeon,Cho, Eun-Mi,Yang, Ha-Ru,Choi, Do-Young,Park, Dong-Suk Pharmaceutical Society of Japan 2006 BIOLOGICAL & PHARMACEUTICAL BULLETIN Vol.29 No.7

<P>Articular cartilage is a potential target for drugs designed to inhibit the activity of matrix metalloproteinases (MMPs) to stop or slow the destruction of proteoglycan and collagen in the cartilage extracellular matrix. The purpose of this study was to investigate the effects of <I>Betula platyphylla</I> var. <I>japonica</I> on inhibiting the release of glycosaminoglycan (GAG), the degradation of collagen, and MMP expression and activity in rabbit articular cartilage explants. Interleukin-1α (IL-1α) rapidly induced GAG, but collagen was much less readily released from cartilage explants. <I>Betula platyphylla</I> var. <I>japonica</I> significantly inhibited GAG and collagen release in a concentration-dependent manner. <I>Betula platyphylla</I> var. <I>japonica</I> dose-dependently inhibited MMP-3 and MMP-13 expression and activities from IL-1α-treated cartilage explant culture when tested at concentrations ranging from 0.02 to 0.2 mg/ml. <I>Betula platyphylla</I> var. <I>japonica</I> had no harmful effect on chondrocyte viability or cartilage morphology in cartilage explants. Histological analysis indicated that <I>Betula platyphylla</I> var. <I>japonica</I> reduced the degradation of the cartilage matrix compared with that of IL-1α-treated cartilage explants. These results indicate that <I>Betula platyphylla</I> var. <I>japonica</I> inhibits the degradation of proteoglycan and collagen through the down regulation of MMP-3 and MMP-13 expression and activities without affecting the viability or morphology of IL-1α-stimulated rabbit articular cartilage explants.</P>

Analysis of Optimal Random Access Policies for Cognitive Radio Networks under Rayleigh fading

Hyeon Je Cho,Gang Uk Hwang 한국산업응용수학회 2011 한국산업응용수학회 학술대회 논문집 Vol.6 No.1

We consider a time slotted cognitive radio network under Rayleigh fading where multiple secondary users (SUs) contend for spectrum usage over available primary users’ channels. We analyze a channel access policy where each SU stochastically determines whether to access a wireless channel or not based on a givne access probability. We focus on the queueing performance of an arbitrary SU. To improve the queueing performance of SUs, the access probability in our channel access policy is adapted to the information on channels, e.g., the number of available channels and the probability of a deep fade for channels. It is then important to obtain the optimal access probabilities from the queueing performance perspective. In this paper we consider three scenarios. In the first scenario, all SUs have full information on wireless channel status and fading channel conditions. In the second scenario, all SUs have full information on wireless channel status but do not know their fading channel conditions, and in the last scenario all SUs do not have any information on wireless channel status and conditions. For each scenario we analyze the queueing performance of an arbitrary SU and show how to obtain the optimal access probabilities with the help of the effective bandwidth theory. From our analysis we provide an insight on how to design an optimal channel access policy in each scenario. We also show how the optimal channel access policies in three scenarios are related with each other. Numerical results are provided to validate our analysis. In addition, we investigate the performance behaviors of the optimal channel access policies.

Effect of Betula platyphylla var. japonica on Proteoglycan Release, Type Ⅱ Collagen Degradation, and Matrix Metalloproteinase Expression in Rabbit Articular Cartilage Explants

CHO, Yoon-Je,HUH, Jeong-Eun,KIM, Deog-Yoon,KIM, Nam-Jae,LEE, Jae-Dong,BAEK, Yong-Hyeon,CHO, Eun-Mi,YANG, Ha-Ru,CHOI, Do-Young,PARK, Dong-Suk 경희대학교 동서의학연구소 2006 東西醫學硏究所 論文集 Vol.2006 No.-

Articular cartilage is a potential target for drugs designed to inhibit the activity of matrix metalloproteinases (MMPs) to stop or slow the destruction of proteoglycan and collagen in the cartilage extracellular matrix. The purpose of this study was to investigate the effects of Betula platyphylla var. japonica on inhibiting the release of glycosaminoglycan (GAG), the degradation of collagen, and MMP expression and activity in rabbit articular cartilage explants. Interleukin-1α (IL-1α) rapidly induced GAG, but collagen was much less readily relesed from cartilage explants. Betula platyphylla var. japonica significantly inhibited GAG and collagen release in a concentration-dependent manner. Betula platyphylla var. japonica dose-dependently inhibited MMP-3 and MMP-13 expression and activities from IL-1α-treated cartilage explant culture when tested at concentrations ranging from 0.02 to 0.2 mg/ml. Betula platyphylla vac japonica had no harmful effect on chondrocyte viability or cartilage morphology in cartilage explants. Histological analysis indicated that Betula platyphylla var. japonica reduced the degradation of the cartilage matrix compared with that of IL-1α-treated cartilage explants. These results indicate that Betula platyphylla var. japonica inhibits the degradation of proteoglycan and collagen through the down regulation of MMP-3 and MMP-13 expression and activities without affecting the viability or morphology, of IL-1α-stimulated rabbit articular cartilage explants.

Note : Simple Detection of Opines by Paper Electrophoresis for Hairy Roots Transformed with Agrobacterium rhizogenes Strains

(Hyeon Je Cho,(Hyo Cheol Ha,(Jae Sung Lee,(Jack M . Widholm 한국응용생명화학회 2001 Journal of Applied Biological Chemistry (J. Appl. Vol.44 No.2

A simple protocol for the detection of opines, cucumopines and mikimopines using a general horizontal or vertical get electrophoresis system for protein or DNA separation in the laboratory are demonstrated. This electrophoresis method can also be applied t

Optimal Dynamic Spectrum Access in Cognitive Radio Networks under Rayleigh Fading

Hyeon Je Cho,Gang Uk Hwang 한국산업응용수학회 2011 한국산업응용수학회 학술대회 논문집 Vol.6 No.2

We consider a time slotted cognitive radio (CR) network under Rayleigh fading where multiple secondary users (SUs) contend for spectrum usage over available primary users channels. In the contention, all SUs use common access probabilities to decide whether they access one of available channels. We focus on the throughput performance of an arbitrary SU. To improve the throughput performance of SUs, it is desirable that the access probabilities are adapted to the information on channel status and fading condition. In the analysis, we derive the optimal access probabilities that maximize the throughput performance of an arbitrary SU. From our analysis, we provide an insight on how to obtain optimal access probabilities in the CR network.

한국 연안 해수 및 퇴적물 중 PFCs 잔류농도

조천래(Cho Chon-Rae),윤준헌(Junheon Yoon),김동우(Dongwoo Kim),제인호(Inho Je),조근옥(Geunok Cho),조현서(Hyeon-Seo Cho) 한국해양환경·에너지학회 2009 한국해양환경공학회 학술대회논문집 Vol.2009 No.11월

Investigation of Quality Change of Traditional Soybean Paste (doenjang) in Gyeongnam

Hyeon-Young Kim,Gi-Jeong Ha,Hee-Jeong Je,In-Jong Ha,Sung Rae Cho,So-young Kim 한국식품영양과학회 2018 한국식품영양과학회 학술대회발표집 Vol.2018 No.10

Induction of Myogenic Differentiation in Myoblasts by Electrical Stimulation

( Hyeon-jeong Je ),( Min-gu Kim ),( Il-hoon Cho ),( Hyuck-joon Kwon ) 대한물리의학회 2019 대한물리의학회지 Vol.14 No.2

PURPOSE: While electrical stimulation (ES) is known to be a safe and flexible tool in rehabilitation therapy, it has had limited adoption in muscle regeneration. This study was performed to investigate whether ES can induce myogenic differentiation and to clarify the mechanism underlying the effects of ES on myogenic differentiation. METHODS: This study used rat L6 cell lines as myoblasts for myogenic differentiation. Electric stimulation was applied to the cells using a C-Pace EP culture pacer (IonOptix, Westwood, Ma, USA). The gene expressions of myogenic markers were examined using qPCR and immunochemistry. RESULTS: Our study showed that ES increased the thickness and length of myotubes during myogenic differentiation. It was found that ES increased the expression of myogenic markers, such as MyoD and Myogenin, and also activated the fusion of the myoblast cells. In addition, ES suppressed the expression of small GTPases, which can explain why ES promotes myogenic differentiation. CONCLUSION: We found that ES induced myogenic differentiation by suppressing small GTPases, inhibiting cell division. We suggest that ES-based therapies can contribute to the development of safe and efficient muscle regeneration.

천측두 동맥에 발생한 외상성 가성 동맥류의 치험례

조문제,곽승일,이백권,김경현 大韓成形外科學會 1995 Archives of Plastic Surgery Vol.22 No.2

The traumatic aneurysm or false aneurysm in the head and neck area is a rare vascular lesion. In these area, the most frequently involved vessel is the superficial temporal artery. In the case presented, a 27 year-old male had a blunt trauma history and showed a slow growing pulsatile soft mass on the left temporal area. The diagnosis was made by the angiogram and Doppler sonogram. Aneurysmal lesion was excised. And its proximal and distal vessel was ligated. The pathogenesis and differential diagnosis are discussed.