• Design & Manufacturing
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• v.2 no.1
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• pp.27-31
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• 2008

The object of this study is a manufacture of buff die using CAM systems. Systems are consist of AutoCAD, CAM software and CNC milling machine. CAM software is purpose of G-code generation for CNC programming. Then CAM software and CNC milling machine are connect to RS-232-C cable for networking.

• Proceedings of The KACE
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• 2018.01a
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• pp.137-140
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• 2018

대한민국의 대표적인 구기 종목 중 하나인 농구는 입문 시 기본 동작에 적응하고 기본 규칙을 이해하기 위해 많은 시간이 소비된다. 또한 기존 농구 학습 분야에서 평가 수행 시 평가 대상자의 실력을 정량적으로 도출하는 것이 힘들어 중 고등학교 체육교과의 수행평가에서 객관적인 평가가 이루어지기 힘들었다. 본 연구에서는 이러한 농구 학습의 한계점을 해결하기 위하여 3축 자이로 센서와 스위치가 적용된 웨어러블 시스템을 기반으로 농구 학습을 도와주는 동작인식 기법을 제안한다. 그리고 실험을 통하여 제안하는 동작인식 기법의 성능을 검증하였으며, 생활체육 활성화를 통한 국민 건강증진과 객관적인 수행평가 실현에 기여할 것으로 기대된다.

• Proceedings of The KACE
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• 2018.01a
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• pp.133-136
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• 2018

최근 하드웨어의 컴퓨팅 능력이 좋아짐에 따라 기계학습 분야가 주목받고 있다. 이에 따라 많은 양의 데이터를 처리하기 수월해졌으며 수많은 데이터들을 기계학습 알고리즘을 통해 학습시키기 간편해졌다. 이러한 발전으로 기계학습이 적용되는 분야 또한 넓어져 교육 분야에도 활발히 적용되고 있다. 본 논문은 SVM(Support Vector Machine)을 사용하여 교실 내 좌석과 시간에 따른 졸음을 예측하는 기법을 제안한다. 제안하는 기법을 통해 교사들은 학생들의 졸음을 사전에 방지 하여 수업 진행에 큰 도움을 줄 것으로 기대된다.

• Proceedings of the Korean Geotechical Society Conference
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• 2009.09a
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• pp.1378-1382
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• 2009

This study is conducted to investigate the possibility of the utilization of the mixed soil formed by mixing stone sludge, bentonite, and residual soil as a soil sealant sustaining both stability and capacity in the barrier system. And the mixed soil formed by mixing stone sludge, river sand is conducted to investigate the possibility of recycle. A series of tests were performed on the mixed soil(stone sludge, bentonite, Cement and residual soil) to evaluate basic properties such as compaction, compressive strength, permeability of these materials. and the stone sludge-river sand mixed soil were performed the discharge capacity tests.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.687-690
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• 2007

OLED devices with a multilayer structure were fabricated using newly synthesized hole transport materials. We confirmed that ELM229 and ELM339, hole transport materials did not affect the electroluminescence color, and that by adopting this novel hole transport materials, OLEDs with a lower driving voltage but a higher efficiency were developed.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.209-212
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• 2011

국가의 미래지향적 정책을 위해서는 무엇보다도 이를 선도해나아갈 핵심인재의 확보가 매우 중요하다. 이러한 핵심인재 확보를 위해 각 부처에서는 지역 R&D 인력양성과 관련된 사업이 진행 중에 있다. 지역 R&D 인력양성사업의 전담기관은 시기와 목적에 따라 변경될 수 있으며, 변경될 때마다 사업목적과 수단이 부합하는지를 점검하기 위하여 사업성과를 객관적으로 분석 및 평가하고 그 결과를 새로운 사업계획 설계에 반영할 필요성이 제기되어 왔다. 그러나, 지역 R&D 인력양성사업은 전담기관 및 사업의 성격에 따라 성과분석 모형을 다르게 적용해 왔으며, 객관적 성과 분석 프레임워크가 부재하다. 따라서, 본 논문에서는 인력양성사업의 특성을 파악하여 객관적으로 분석 및 평가에 활용할 수 있는 성과 분석 모형을 설계하고자 한다.

• Journal of the Korean Applied Science and Technology
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• v.28 no.3
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• pp.345-350
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• 2011

Antioxidant agent, 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane were prepared and investigated the antioxidant activity on recycled rubber mat manufactured with waste tire powder. Mechanical properties of rubber mat are influenced by many factor such as compounding ingredients and state of cure, process of rubber, and fillers. Our study aim is to investigate influence of antioxidant activities on ozone cracking and the thermal aging time. In this work, the degradation of recycled rubber mat was studied and suggested mechanism to involve two-type of degradation, thermal aging and cracking both of which can be contained antioxidant or non-antioxidant agent.

• Investigative Magnetic Resonance Imaging
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• v.20 no.4
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• pp.259-263
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• 2016

Primary diffuse large B-cell lymphoma of the seminal vesicle is an extremely rare disorder, with only two cases reported in the English literature. Here, we present imaging findings of a case of primary diffuse large B-cell lymphoma of the seminal vesicle. On transrectal ultrasonography, the mass presented as a 3.0-cm-sized heterogeneous, hypoechoic lesion in the right seminal vesicle. Computed tomography (CT) revealed a mass with rim-like enhancement in the right seminal vesicle. On magnetic resonance imaging (MRI), the tumor showed iso-signal intensity on T1-weighted images and heterogeneously intermediate-high signal intensity on T2-weighted images. The tumor showed rim-like and progressive enhancement with non-enhancing portion on dynamic scanning. Diffusion restriction was observed in the mass. On fluorodeoxyglucose positron emission tomography-computed tomography (FDG PET/CT) imaging, a high standardized uptake value (maxSUV, 23.5) by the tumor was noted exclusively in the right seminal vesicle.

• Journal of Microbiology and Biotechnology
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• v.22 no.12
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• pp.1629-1635
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• 2012

Previously, we demonstrated that the erythropoietin receptor (EpoR) is present on fibroblasts, where it regulates focal contact. Here, we assessed whether this action of EpoR is involved in the reduced cell adhesion observed in colonocytes exposed to Clostridium difficile toxin A. EpoR was present and functionally active in cells of the human colonic epithelial cell line HT29 and epithelial cells of human colon tissues. Toxin A significantly decreased activating phosphorylations of EpoR and its downstream signaling molecules JAK-2 (Janus kinase 2) and STAT5 (signal transducer and activator of transcription 5). In vitro kinase assays confirmed that toxin A inhibited JAK 2 kinase activity. Pharmacological inhibition of JAK2 (with AG490) abrogated activating phosphorylations of EpoR and also decreased focal contacts in association with inactivation of paxillin, an essential focal adhesion molecule. In addition, AG490 treatment significantly decreased expression of occludin (a tight junction molecule) and tight junction levels. Taken together, these data suggest that inhibition of JAK2 by toxin A in colonocytes causes inactivation of EpoR, thereby enhancing the inhibition of focal contact formation and loss of tight junctions known to be associated with the enzymatic activity of toxin A.

• Journal of Microbiology and Biotechnology
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• v.25 no.10
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• pp.1640-1647
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• 2015

We recently reported that the antimicrobial peptide Lumbricusin (NH₂-RNRRWCIDQQA), isolated from the earthworm, increases cell proliferation in neuroblastoma SH-SY5Y cells. Here, we investigated whether Lumbricusin has neurotropic activity in mouse neural stem cells (MNSCs) and a protective effect in a mouse model of Parkinson's disease (PD). In MNSCs isolated from mouse brains, Lumbricusin treatment significantly increased cell proliferation (up to 12%) and reduced the protein expression of p27^Kip1 through proteasomal protein degradation but not transcriptional regulation. Lumbricusin inhibited the 6-OHDA-induced apoptosis of MNSCs, and also showed neuroprotective effects in a mouse PD model, ameliorating the motor impairments seen in the pole, elevated body swing, and rotation tests. These results suggest that the Lumbricusin-induced promotion of neural cell proliferation via p27^Kip1 degradation has a protective effect in an experimental PD model. Thus, the antimicrobial peptide Lumbricusin could possibly be developed as a potential therapeutic agent for the treatment of PD.