• 정보통신설비학회논문지
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• 제1권2호
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• pp.30-42
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• 2002

UPnP는 홈 네트워크 미들웨어 가운데 가장 먼저 상용화되었으나 보안에 관한 표준화된 기술이 없는 문제점이 있다. 본 논문에서는 이러한 UPnP를 위한 보안 모델을 설계하고 구현하였다. 설계된 모델은 XML Signature를 이용하여 사용자가 장치를 제어할 때 생성하는 UPnP 메시지에 보안 기능을 부가하도록 설계되었으며, 제공되는 기능은 장치 제어 메시지에 대한 인증 및 사용자 접근 제어이다. 본 보안 모델은 UPnP 모듈과는 독립적으로 구성되어 보안 서비스를 제공하는 특징을 가지고 있으며, 사용자 데이터의 부분 보안 기능을 제공하기위하여 사용자 부분으로 보안 모듈을 이동할 수 있도록 설계하였다. 마지막으로 구현한 UPnP 보안 모델이 사용자가 UPnP 오디오 장치를 제어할 때 적용되는 예를 보인다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 추계종합학술대회
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• pp.943-946
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• 2005

핸드오프 제어에서의 가장 큰 문제점은 핸드오프시 일시적인 링크 절단에 따라 발생하는 서비스 품질의 저하이다. 이에 따라 핸드오프 처리시간을 최소화하는 방안으로 핸드오프 처리시간을 줄이기 위해 인접 AP를 중심으로 하는 무선환경을 측정, 관리하여 핸드오프시 이 정보를 활용한 빠른 핸드오프를 제공하는 방안이 IEEE 802.11k에서 제안되었다. 본 연구에서는 무선랜 기반의 홈네트워크에 이 방식을 적용시 핸드오프 처리시간, 무선스펙트럼 사용 감소, 핸드오프 커버리지의 특성을 분석하였다.

• Bulletin of the Korean Chemical Society
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• 제21권11호
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• pp.1119-1124
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• 2000

$\beta-Cyclodextrin$ derivatives connected with diaza-18-crown-6 through flexible bridges (R) at the secondary face 1a-c (1a: R = $-(CH_2)4-;$ 1b: R = $-CH_2CH_2OCH_2CH2-;$ 1c: R = $-(CH_2)8-)$ have been prepared. The associa tion constants of 1 with (2-naphthoxy)alkylammonium ions (2a: alkyl = butyl; 2b: alkyl = octyl) were determined by induced circular dichroism (ICD) spectroscopy and it was found that the derivatization of $\beta-CD$ with the diazacrown resulted in enhanced binding with 2, compared to the native $\beta-CD.$ ICD Characteristics of the host-guest complexes indicate that a part of the alkylammonium moiety of 2 is protruded from the secondary side of the $\beta-CD$ cavity, and the guest molecules 2a and 2b move to the secondary and primary side, respectively, to make the binding of the ammonium group with the diaza-18-crown-6 moiety more feasible. The energy accompanied by the relocation of the guest molecules inside $\beta-CD$ moiety is compensated by the interaction energy between the ammonium ion and diazacrown ether.

• 유기물자원화
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• 제19권1호
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• pp.115-122
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• 2011

의류용 세탁세제와 샴푸와 같은 합성세제가 혼입된 먹이를 급이하였을 경우 줄지렁이 개체군의 산란률, 난포당 부화개체수 및 차세대 발육 유충수의 증가를 유발시켰으며, 산란된 난포의 부화율에는 영향을 미치지 않는 것으로 나타났다. 따라서 생태독성학적 측면에서 합성세제는 줄지렁이 개체군에 대해 독성 현상을 유발하지 않으며 가정에서 사용하는 합성세제는 하수슬러지를 지렁이에게 지속적으로 급이하였을 때 나타나는 지렁이 개체군 소멸현상의 직접적인 원인이 아닌 것으로 판단된다.

• 대한한의학방제학회지
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• 제29권4호
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• pp.267-275
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• 2021

Objectives : Previously, we reported that compound K isolated from fermented ginseng by Aspillus oryzae has a wide biochemical and pharmacological effect, including anti-cancer activity in prostate cancer PC-3 cells. Despite these findings, its signaling pathway and gene expression pattern are not clearly understood. Methods : To confirm the gene expression study of treated with compound K in PC-3 cells, a cDNA microarray chip composed of 44K human cDNA probes was used. MTT assay, western blot analysis, propidium iodide staining, and annexin V/propidium iodide staining were analyzed. Results : We confirmed the differences of gene expression profiles. Then, we analyzed with the cell cycle arrest, cell death and cell proliferation related genes using DAVID database. Conclusions : Our finding should be useful for understanding genome-wide expression patterns of compound K-mediated cell cycle arrest toward induction of cell death and be helpful for finding future cancer therapeutic targets for prostate cancer cells.

• 대한건축학회논문집:구조계
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• 제34권5호
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• pp.51-58
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• 2018

The purpose of this study was to analyze the effect of seasonal change in characteristics of hygiene activity on domestic hot water energy consumption. With 16 residents of 4 households, the data about frequency of hygiene activity and water temperature was collected from February to August, 2017. The results of collected data discovered that the frequency of hygiene activity was higher especially in summer, whereas the consumption of warm water they used was higher in winter. The seasonal change in characteristics of hygiene activity was analyzed to be changed and strongly influenced by outdoor temperature. The influence of characteristics of hygiene activity on hot water consumption was analyzed. There was 13% of difference between consumption that was calculated taking characteristics of hygiene activity into account and consumption that was not. Therefore, this study suggested hygiene activity schedule, hot water profile and hot water consumption pattern, which can be utilized for improving simulation as well.

• 대한한의학방제학회지
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• 제30권3호
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• pp.155-163
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• 2022

Objectives : Lonicera japonica is known for anti-inflammation and antibiotic effect in Korean medicine. This study aimed for investigating the cytoprotective effect of Lonicera japonica extract (LJE) for HepG2 cells against arachidonic acid (AA)+iron-induced oxidative stress. Methods : The effect of LJE on cell viability was assessed by MTT assay. ROS assay was selected to assess antioxidant effect of LJE. To assess LJE's effect on mitochondrial function, flow cytometric analysis was operated. And immunoblot analysis was used to establish the underlying mechanism of LJE. Results : LJE protected HepG2 cells against AA+iron-induced oxidative stress by phosphorylation of liver kinase B1 and blocked the decline of procaspase 3. Also, LJE preserved the mitochondrial membrane permeability induced by AA+iron. Conclusion : LJE protected the hepatocyte from AA+iron-induced oxidative stress by activation of LKB1 by the preservation of mitochondrial functions.

• 대한한의학방제학회지
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• 제31권1호
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• pp.41-51
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• 2023

Objectives : Raphani Semen (Raphanus sativus L.) is known for the various beneficial effects in Korean medicine. This study aimed to investigate the effect of Raphani Semen extract (RSE) against arachidonic acid (AA)+iron-induced oxidative stress in cells. Methods : Ingredients, their target information, oxidative stress liver injury-related proteins was obtained from various network pharmacology databases and software. A hypergeometric test and enrichment analysis were conducted to evaluate associations between protein targets of RSE. The cell viability was assessed by MTT assay, and immunoblot analysis was used to confirm the molecular mechanisms. Results : A compound-target network of RSE was constructed, which consisted of 336 edges between 18 ingredients and 123 protein targets. PI3K-Akt signaling pathway, ErbB signaling pathway, HIF-1 signaling pathway, PPAR signaling pathway, and AMPK signaling pathway was significantly associated with protein targets of RSE. RSE protected HepG2 cells against AA+iron-induced oxidative stress as mediated with AMPK signaling. Conclusion : RSE was found to protect the cells against oxidative stress via the AMPK signaling pathway.

• 유기물자원화
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• 제25권3호
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• pp.79-89
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• 2017

경기도 포천시 관내 하수 및 인분 처리장들에서 발생하는 유기성 슬러지를 지렁이 먹이로 공급하였을 때, 지렁이 사육상의 수용성 양이온, 음이온 농도 및 pH, 전기전도도 등의 이화학 성상 변화를 추적하였다. 먹이로 공급된 슬러지의 pH, 전기전도도, 유기물 함량 및 함수율은 지렁이의 단기적 섭식이 가능한 범위였으나, 슬러지의 공급량이 늘어감에 따라 섭식속도가 느려지고 결국 지렁이 사멸현상이 나타났다. 또한 슬러지 공급량이 늘어감에 따라 지렁이 사육상이 산성화되었고, 전기전도도가 높아지는 것으로 보아 염류집적 현상이 일어난 것을 알 수 있었으며, 동시에 사육상의 수용성 음이온 및 양이온 농도가 높아졌다. 특히 수용성 이온 중 ${NO_3}^-$의 농도 집적이 두드러졌다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권2호
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• pp.269-278
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• 1996

To overcome the limitations of conventional microsurgical tissue transfer, experimental creation of various neo-flaps using the vessel implantation technique has been reported. We have performed some experiments of fabrication of neo-osseous flap with local vessels and iliac bone slabs to know that the flap vascularity and neo-angiogenesis are achieved enough to microtransfer. As a next step of our previous experiments, the flap viability and the histologic change between the recipient bone and neo-oseous flap was assessed after microsurgical transplantation. The flap was created on the rabbit femoral region(n=25) using femoral vessel and the iliac bone segments($2.5{\times}1.5cm$ in size). Three weeks after neovascularization, the newly formed flap was harvested and microtransferred to the mandibular defect. As a control, contralateral mandibular defect was created and reconstructed with conventional free iliac bone graft. Scintigrams of experimental group performed 3 days after microtransfer showed hot uptake, while that of control poor uptake. Histologic and vital stain labeling study revealed good bone viability and vascularity of neo-osseous flap. In conclusion, prefabricated neo-osseous flap of our model could be transferred to the recipient site with retaining the flap viability and showed advantages over the conventional bone graft in that it was living bone graft.