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6LoWPAN에서 딕스트라 알고리즘을 이용한 에너지 효율적인 라우팅 프로토콜
진소,김중규 대구대학교 정보통신연구소 2010 情報通信硏究 Vol.7 No.1
최근에 IEEE 802.15.4 프로토콜은 데이터 전송 속도가 낮은 무선 통신을 위한 표준 프로토콜로 채택되었다. 서비스의 이용 확산과 센서 네트워크의 관리를 용이하기 위해 IETF 6LoWPAN(IPv6 over Low power WPAN) WG에서는 IEEE 802.15.4 MAC/PHY 상위 계층에 IPv6를 기존 인터넷에서 사용가능 한 무선통신 프로토콜에 대한 표준화 작업을 진행하고 있다. 센서 네트워크에서 노드간의 통신을 위한 라우팅 프로토콜은 AODV, LOAD, DYMO-low 등을 사용하고 있는데, 이러한 라우팅 프로토콜들은 에너지를 고려하지 않기 때문에 센서 네트워크에 그대로 적용하면 에너지 효율적 측면에서 문제점이 발생한다. 따라서 본 연구에서는 에너지 효율적인 라우팅 프로토콜로 DAODV을 제안하고자 한다. 이 방법에서는 노드 에너지 잔량 값을 이용하여 그 라우팅 경로비용이 결정되면 딕스트라 알고리즘을 적용하여 각 노드의 에너지에 대한 최단경로를 선택한다. The IEEE 802.15.4 protocol in the wireless communications technology, which is defined low-data-rate in a wireless personal area network. In order to expand the services and facilitate the management of sensor networks, IETF 6LoWPAN(IPv6 over Low power WPAN) WG by integrating IPv6 with Low-Rate Wireless Personal Area Newtork, which in the IEEE 802.15.4 MAC/PHY upper layer of IPv6, in order to used in the benchmark Internet, is being a standardized wireless communication protocol. For the communication between nodes in sensor network there are AODV, LOAD, DYMO-low routing protocols. However, these routing protocols do not consider the energy, the same problem occurs in terms of energy efficient. For these reasons, energy efficient routing protocol in this research to have suggested DAODV. Using nodes remanent energy, and if the cost of the routing path is determined, each node on the energy of the shortest path by applying the Dijkstra algorithm should calculate and communications.
고속액체크로마토그래피에 의한 나프록센 광학이성질체의 분리 및 품질관리
정수진,진전성,이은주,이은실,강종성 忠南大學校 生命科學硏究院 醫藥品開發硏究所 2006 藥學論文集 Vol.21 No.-
Enantiomeric separation of naproxen is necessary in drug evaluation processes as the pharmacological activity of naproxen resides mainly in the (S)-enantiomer, The enantioseparation of naproxen was carried out with three different stationary phases. The methods were validated with the terms of linearity, intraday and interday precision, accuracy, selectivity and recovery. Among the selected stationary phases, ChiroSil DMB column with hexane : t-butylmethylether : acetic acid (60:40:0.1, v/v/v) as mobile phase showed the best enantioseparation of the naproxen in the commercial preparations. The wavelength for detection was 270 nm and flow rate was 2.0 mL/min. The contents of (S)-naproxen in the commercial preparations were 92.7 - 98.3%, indicating that all tested preparations were satisfactory to current regulation. However, the contents of (R)-naproxen as impurity in the commercial preparations were varied from 0.08% to 1.08%.
Su, Chin-Hui,Cheng, Chih-Hsiang,Lin, Jung-Hsin,Liu, Hsiu-Chou,Yu, Yen-Ting,Lin, Chai-Ching,Chen, Wei-Jung Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.11
Objective: The objective of this experiment was to investigate the effects of different colors produced by light emitting diode (LED) on Brown Tsaiya ducks. Methods: A total of 144 female Brown Tsaiya ducks were randomly allocated into three individual cage rearing chambers with different LED illumination colors as treatments. Three different treatments were: i) white color, ii) blue color, and iii) red color. The experiment periods were from ducks 21 to 49 weeks of age, determined traits included i) egg laying performance, ii) feed intake, iii) egg shell breaking strength, iv) egg shell thickness, v) egg Haugh unit, vi) egg weight, vii) serum Estradiol and Progesterone concentration, and viii) behavior pattern. Results: The results indicated that when compared with white and blue color, red color could stimulate ducks sexual maturation and raised the egg laying performance. The red light group was also observed to have the highest feed intake among three treatments. The blue treatment had the lowest egg shell breaking strength and the highest egg weight among three treatments, nevertheless, no significant difference was observed among three treatments on egg shell thickness and egg Haugh unit. The red light group had higher serum estradiol concentration than the white and blue groups, but no significant difference among treatments on the serum Progesterone concentration was found. The results of behavior pattern indicated that red light group showed more feeding and less resting behavior compared to the blue light group. Conclusion: We found a potential of applying red light illumination in the indoor laying duck raising system with positive results on egg laying performance and acceptable egg weight, equivalent egg qualities compared to white and blue light.
Su, Chun-Lin,Yang, Jia-Ruei,Kuo, Wen-Ling,Chen, Shin-Cheh,Cheong, David Chon-Fok,Huang, Jung-Ju Korean Society of Plastic and Reconstructive Surge 2021 Archives of Plastic Surgery Vol.48 No.5
Background Direct-to-implant (DTI) breast reconstruction after nipple-sparing mastectomy (NSM) with the use of acellular dermal matrix (ADM) provides reliable outcomes; however, the use of ADM is associated with a higher risk of complications. We analyzed our experiences of post-NSM DTI without ADM and identified the predictive factors of adverse surgical outcomes. Methods Patients who underwent NSM and immediate DTI or two-stage tissue expander (TE) breast reconstruction from 2009 to 2020 were enrolled. Predictors of adverse endpoints were analyzed. Results There were 100 DTI and 29 TE reconstructions. The TE group had a higher rate of postmastectomy radiotherapy (31% vs. 11%; P=0.009), larger specimens (317.37±176.42 g vs. 272.08±126.33 g; P=0.047), larger implants (360.84±85.19 g vs. 298.83±81.13 g; P=0.004) and a higher implant/TE exposure ratio (10.3% vs. 1%; P=0.035). In DTI reconstruction, age over 50 years (odds ratio [OR], 5.43; 95% confidence interval [CI], 1.50-19.74; P=0.010) and a larger mastectomy weight (OR, 1.65; 95% CI, 1.08-2.51; P=0.021) were associated with a higher risk of acute complications. Intraoperative radiotherapy for the nipple-areolar complex increased the risk of acute complications (OR, 4.05; 95% CI, 1.07-15.27; P=0.039) and the likelihood of revision surgery (OR, 5.57; 95% CI, 1.25-24.93; P=0.025). Conclusions Immediate DTI breast reconstruction following NSM is feasible in Asian patients with smaller breasts.
Ion-Mediated Electron Transfer in a Supramolecular Donor-Acceptor Ensemble
Park, Jung Su,Karnas, Elizabeth,Ohkubo, Kei,Chen, Ping,Kadish, Karl M.,Fukuzumi, Shunichi,Bielawski, Christopher W.,Hudnall, Todd W.,Lynch, Vincent M.,Sessler, Jonathan L. American Association for the Advancement of Scienc 2010 Science Vol.329 No.5997
<P>Ion binding often mediates electron transfer in biological systems as a cofactor strategy, either as a promoter or as an inhibitor. However, it has rarely, if ever, been exploited for that purpose in synthetic host-guest assemblies. We report here that strong binding of specific anions (chloride, bromide, and methylsulfate but not tetrafluoroborate or hexafluorophosphate) to a tetrathiafulvalene calix[4]pyrrole (TTF-C4P) donor enforces a host conformation that favors electron transfer to a bisimidazolium quinone (BIQ<SUP>2+</SUP>) guest acceptor. In contrast, the addition of a tetraethylammonium cation, which binds more effectively than the BIQ<SUP>2+</SUP> guest in the TTF-C4P cavity, leads to back electron transfer, restoring the initial oxidation states of the donor and acceptor pair. The products of these processes were characterized via spectroscopy and x-ray crystallography.</P>
Ban, Jung Ok,Kim, Dae Hwan,Lee, Hee Pom,Hwang, Chul Ju,Shim, Jung-Hyun,Kim, Dae Joong,Kim, Tae Myoung,Jeong, Heon-Sang,Nah, Seong Su,Chen, Hanyong,Dong, Zigang,Ham, Young Wan,Kim, Youngsoo,Han, Sang-B Wiley (Blackwell Publishing) 2014 British journal of pharmacology Vol.171 No.11
<P>Products of Maillard reactions between aminoacids and reducing sugars are known to have anti-inflammatory properties. Here we have assessed the anti-arthritis effects of (E)-2,4-bis(p-hydroxyphenyl)-2-butenal and its possible mechanisms of action.</P>