• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
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• pp.376-381
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• 1987

There are many kinds of intelligent devices on the factory floor nowadays. Standardized communication methods became a necessity for efficient flow of production information among various systems. MAP (Manufacturing Automation Protocol) based on ISO (International Standard Organization) OSI (Open Systems Interconnection) is gaining acceptance of major industries worldwide.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1994-1995
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• 2007

본 논문에서는 가로등 제어를 위한 전력선 통신 프로토콜을 OSI 7계층을 바탕으로 설계하고, 실제 적용해 봄으로써 그 실용성을 입증한다. 그러나 전력선 채널의 상태가 좋지 않으면 멀리 있는 모뎀까지의 전송 확률이 떨어짐을 확인하였다.

• 대한물리의학회지
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• 제4권2호
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• pp.79-86
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• 2009

Purpose：The purpose of this study was to investigated the effect of stability on heel-heights of insole in healthy adults. Methods：Subjects of 39 males measured stability index of the Biodex Stability System(BSS) by wearing shoes of 2cm, 5cm insoles including bare feet. The BSS was consisted of a movable balance platform and the platform was interfaced with computer software that enables the device to serve as an assessment of balance performance. Stability index of the BSS included overall stability index(OSI), anteroposterior stability index(APSI), mediolateral stability index(MLSI). In the BSS, subjects were asked to step on to the platform of the BSS and assume a comfortable position while maintaining slight flexion in the knees, looking straight ahead. Subjects were trained for 10min for adaptation to the heel-height of insole and then they maintained double limb stance for 2min. Biodex platform set to convert Lv.8 into Lv.1 gradually. Results：There were statistically significant differences between heel-heights of insole and stability index of OSI, APSI, and MLSI(p<.05). The result of post-hoc test were as follows; 1)OSI had significant differences between bare feet and 2cm, 5cm. 2)APSI had significant differences between bare feet and 2cm, 5cm. 3)MLSI had significant differences between bare feet and 2cm, 5cm(p<.05). Conclusions：We found that the more heels of insole high, the more stability index increases. In particular, balance index of insole above 5cm more increased and we could acknowledge that the insole above 5cm more effected balance of healthy adults.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1990년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 26-27 Oct. 1990
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• pp.761-766
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• 1990

Manufacturing Message Specification(MMS) was sewed as an International Standard by International Standardization Organization(ISO). MMS is being accepted throughout the world as a solution to communications among multi vendor factory floor environments. This paper describes an implementation of MMS which operates on Application Layer of Open Systems Interconnection(OSI) 7 layer model. MMS was implemented on MSDOS in apersonal computer environment.

• 한국응용과학기술학회지
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• 제22권1호
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• pp.15-20
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• 2005

$Na_2CO_3$. Sodium orthosilicate (Na-OSi), Tetronix T-701 (T-701), Na-dioctyl sulfosuccinate (303C), Newpol PE-68 (PE-68), MJU-100A, and tetrasodium pyrophosphate were blended to prepare high performance alkaline cleaning agents (ACASs). The results of cleaning test with steel specimen showed that ACAS-6 ($Na_2CO_3$ 50g/Na-OSi 35g/T-701 20g/303C 18g/PE-68 17g/MJU-100A 10g/TSPP 20g/ water 180g mixture) had a good cleaning power. The cleaning power for press-rust preventing oil was 98% and 99% degreasing at 4wt%, $70^{\circ}C$ and $90^{\circ}C$, respectively ; for quenching oil, the cleaning power of ACAS-6 was 91% degreasing at 4wt% and $70^{\circ}C$. The foam heights measured immediately after foaming by Ross & Miles method and Ross & Clark method at 6wt%, $60^{\circ}C$ were 18mm and 65mm, respectively. It was concluded that ACAS-6 had a good low foaming cleaning agent.

• Asian Pacific Journal of Cancer Prevention
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• 제16권12호
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• pp.5059-5062
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• 2015

Background: ALL is an irredeemable disease due to the resistance to treatment. There are several influences which are involved in such resistance to chemotherapy, including oxidative stress as a result of the generation of reactive oxygen species (ROS) and presence of hypodiploid cells. Cluster of differentiation 26 (CD26), also known as dipeptidyl peptidase-4, is a 110 kDa, multifunctional, membrane-bound glycoprotein. Aim and objectives: The aim of this study was to evaluate the clinical significance of serum CD26 in patients with acute lymphoblastic leukaemia patients in the post remission induction phase, as well as the relationship between CD26 activity and the oxidative stress status. Materials and Methods: CD26, total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI), in addition to activity of related enzymes myeloperoxidase, glutathione-s-transferase and xanthine oxidase, were analysed in sixty children with acute lymphoblastic leukaemia in the post remission induction phase. Results: The study showed significant elevation in CD26, TOS and OSI levels in patients with acute lymphoblastic leukaemia in the post remission induction phase in comparison to healthy control samples. In contrast, myeloperoxidase, glutathione-s-transferase and xanthine oxidase activities were decreased significantly. A significant correlation between CD26 concentration and some oxidative stress parameters was evident in ALL patients. Conclusions: Serum levels of CD26 appear to be useful as a new biomarker of oxidative stress in children with acute lymphoblastic leukaemia in the post remission induction phase, and levels of antioxidants must be regularly estimated during the treatment of children with ALL.

• 한국임상수의학회지
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• 제30권1호
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• pp.1-4
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• 2013

본 연구는 개에서 주요 정형외과 수술에 따른 전신 산화 스트레스 상태를 평가하였다. 16 마리의 골절이나 사지의 탈구 질환을 포함하는 환축을 대상으로 연구를 실시하였고 모든 환축은 골절이나 탈구의 치료를 위해 다양한 정형외과 수술을 받았다. 수술 후 혈장 총 산화상태(total oxidant status, TOS) 및 산화스트레스 지수(oxidative stress index, OSI)에서 유의적인 증가가 확인되었다. 수술 후 혈장 총 항산화상태(total antioxidant status, TAS)에서 유의적인 감소를 확인하였다. 본 연구를 통해 정형외과 수술외상에 따른 혈장 내 총 산화 및 항산화 상태가 산화스트레스와 관련 있음을 확인 할 수 있었다.

• Journal of Communications and Networks
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• 제11권6호
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• pp.544-555
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• 2009

This work continues a trend of developments aimed at exploiting the physical layer of the open systems interconnection (OSI) model to enhance wireless network security. The goal is to augment activity occurring across other OSI layers and provide improved safeguards against unauthorized access. Relative to intrusion detection and anti-spoofing, this paper provides details for a proof-of-concept investigation involving "air monitor" applications where physical equipment constraints are not overly restrictive. In this case, RF fingerprinting is emerging as a viable security measure for providing device-specific identification (manufacturer, model, and/or serial number). RF fingerprint features can be extracted from various regions of collected bursts, the detection of which has been extensively researched. Given reliable burst detection, the near-term challenge is to find robust fingerprint features to improve device distinguishability. This is addressed here using wavelet domain (WD) RF fingerprinting based on dual-tree complex wavelet transform (DT-$\mathbb{C}WT$) features extracted from the non-transient preamble response of OFDM-based 802.11a signals. Intra-manufacturer classification performance is evaluated using four like-model Cisco devices with dissimilar serial numbers. WD fingerprinting effectiveness is demonstrated using Fisher-based multiple discriminant analysis (MDA) with maximum likelihood (ML) classification. The effects of varying channel SNR, burst detection error and dissimilar SNRs for MDA/ML training and classification are considered. Relative to time domain (TD) RF fingerprinting, WD fingerprinting with DT-$\mathbb{C}WT$ features emerged as the superior alternative for all scenarios at SNRs below 20 dB while achieving performance gains of up to 8 dB at 80% classification accuracy.

• 한국식품영양과학회지
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• 제40권5호
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• pp.747-752
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• 2011

트랜스산 문제로 경화공정이 기피되는 상황에서 식물성 유지의 산화안정성 향상과 이를 이용한 분말상 식물성크림의 유통기간 향상을 목적으로, 천연 유래의 산화방지제인 토코페롤, 녹차추출물, 로즈마리 추출물의 항산화 효과와 ascorbic acid의 상승효과도 검토하였다. 또한 가속실험을 통하여 이들 제품의 유통기간 연장 가능성을 예측하고자 하였다. 팜유에 대한 항산화 활성이 가장 큰 항산화제는 녹차추출물이었으며 팜유에 400 ppm 첨가한 경우 OSI 시간은 67.7시간으로 팜유 대비 2.3배 향상되었다. 유통기간 예측을 위한 품질지표는 관능점수가 가장 높은 결정계수를 보였고, $20^{\circ}C$에서는 대조군에 비해 녹차추출물(400 ppm) 첨가군 (TE)은 2.5개월(28%), 녹차추출물(400 ppm)과 ascorbic acid(0.002%)를 첨가한 군(TEA)은 5.5개월(62.5%)이 연장되었다. $25^{\circ}C$에서는 대조군이 7.2개월인 데 비하여 TE군은 8.9개월(23%), TEA군은 51% 향상된 10.9개월의 유통기간 연장효과를 보였다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 추계종합학술대회
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• pp.517-520
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• 2005

무선 센서망은 망의 사용목적에 따라 빛, 온도, 진동, 자기 영역, 바람 등을 감지 할 수 있는 센서와 컴퓨팅 기술로 통합된다. 무선 노드들은 센서에서 감지된 정보를 처리하는 신호 처리 기술과 측정자에게 정보가 도달하게 하는 통신 제어 기술과, 무선으로 구동되고 배터리를 사용하기 때문에 발생하는 제한적 에너지 관리 기술이 구현된다. 그 중 신뢰성 있는 측정 및 감지를 하고자 한다면 망의 지속시간의 비중이 크기 때문에 효율적인 에너지 관리 기술이 필요하다. 따라서 본 논문에서는 하드웨어에서의 전원관리가 아닌 OSI 7계층 중 데이터 링크 계층에 해당하는 MAC(Medium Access Control)에서 기존의 무선 MAC 프로토콜인 CSMA/CA(Carrier Sense Multiple Access/Collision Avoidance)과 무선 센서 MAC 프로토콜인 ER-MAC(Energy Rate Medium Access Control)에 대해 설명후 각각 프로토콜에 따른 망의 지속시간을 비교하여 효율성을 분석한다.