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Novel Architecture of Self-organized Mobile Wireless Sensor Networks
Rizvi, Syed,Karpinski, Kelsey,Razaque, Abdul Korean Institute of Information Scientists and Eng 2015 Journal of Computing Science and Engineering Vol.9 No.4
Self-organization of distributed wireless sensor nodes is a critical issue in wireless sensor networks (WSNs), since each sensor node has limited energy, bandwidth, and scalability. These issues prevent sensor nodes from actively collaborating with the other types of sensor nodes deployed in a typical heterogeneous and somewhat hostile environment. The automated self-organization of a WSN becomes more challenging as the number of sensor nodes increases in the network. In this paper, we propose a dynamic self-organized architecture that combines tree topology with a drawn-grid algorithm to automate the self-organization process for WSNs. In order to make our proposed architecture scalable, we assume that all participating active sensor nodes are unaware of their primary locations. In particular, this paper presents two algorithms called active-tree and drawn-grid. The proposed active-tree algorithm uses a tree topology to assign node IDs and define different roles to each participating sensor node. On the other hand, the drawn-grid algorithm divides the sensor nodes into cells with respect to the radio coverage area and the specific roles assigned by the active-tree algorithm. Thus, both proposed algorithms collaborate with each other to automate the self-organizing process for WSNs. The numerical and simulation results demonstrate that the proposed dynamic architecture performs much better than a static architecture in terms of the self-organization of wireless sensor nodes and energy consumption.
( Loren W Kline ),( Edward Karpinski ) 대한소화기기능성질환·운동학회 2015 Journal of Neurogastroenterology and Motility (JNM Vol.21 No.1
Background/Aims Resveratrol (3,5,4``-trihydroxystilbene) is a polyphenolic compound (stilbene) and a phytoalexin. The purpose of this study was to determine the mechanism which mediated the resveratrol-induced relaxation of cholecystokinin octapeptide- or KCl-induced tension in male guinea pig gallbladder strips. Methods Gallbladder strips were prepared and suspended in in vitro chambers filled with Krebs-Henseleit solution. The strips were attached to force displacement transducers, and the changes in tension were recorded on a polygraph. All reagents were added directly into the chambers. Results To determine if intracellular Ca2+ release mediated the resveratrol-induced relaxation of cholecystokinin octapeptide-induced tension, 2-aminoethoxydiphenylborane (2-APB) was used. 2-APB significantly (P < 0.01) decreased the amount of RSVL-induced relaxation. To determine if protein kinase A (PKA) mediated the resveratrol-induced relaxation, PKA inhibitor 14-22 amide myristolated (PKA-IM) was used. PKA-IM had no effect on resveratrol-induced relaxation. Neither KT5823, NG-methyl-L-arginine acetate salt, a nitric oxide synthase inhibitor, nor fulvestrant had a significant effect on the amount of resveratrol-induced relaxation. Genistein, a protein tyrosine kinase inhibitor, significantly (P < 0.01) increased the RSVL-induced relaxation. To determine if protein kinase C mediated the RSVL-induced relaxation, the protein kinase C inhibitors bisindolymaleimide IV and chelerythrine Cl- were used together, and a significant (P < 0.05) increase in resveratrol-induced relaxation was observed. The pretreatment of the strips with resveratrol significantly (P < 0.001) decreased the amount of KCl- and cholecystokinin octapeptide- induced tension. Conclusions Resveratrol-induced relaxation is mediated by its effects on L-type Ca2+ channels and intracellular Ca2+ release.
Novel Architecture of Self-organized Mobile Wireless Sensor Networks
Syed Rizvi,Kelsey Karpinski,Abdul Razaque 한국정보과학회 2015 Journal of Computing Science and Engineering Vol.9 No.4
Self-organization of distributed wireless sensor nodes is a critical issue in wireless sensor networks (WSNs), since each sensor node has limited energy, bandwidth, and scalability. These issues prevent sensor nodes from actively collaborating with the other types of sensor nodes deployed in a typical heterogeneous and somewhat hostile environment. The automated self-organization of a WSN becomes more challenging as the number of sensor nodes increases in the network. In this paper, we propose a dynamic self-organized architecture that combines tree topology with a drawn-grid algorithm to automate the self-organization process for WSNs. In order to make our proposed architecture scalable, we assume that all participating active sensor nodes are unaware of their primary locations. In particular, this paper presents two algorithms called active-tree and drawn-grid. The proposed active-tree algorithm uses a tree topology to assign node IDs and define different roles to each participating sensor node. On the other hand, the drawn-grid algorithm divides the sensor nodes into cells with respect to the radio coverage area and the specific roles assigned by the active-tree algorithm. Thus, both proposed algorithms collaborate with each other to automate the self-organizing process for WSNs. The numerical and simulation results demonstrate that the proposed dynamic architecture performs much better than a static architecture in terms of the self-organization of wireless sensor nodes and energy consumption.
Myocardial Infarction Type 4b in Human Immunodeficiency Virus-Infected Patient
Aneta Cybula-Walczak,Filip M. Szymanski,Anna E. Platek,Grzegorz Karpinski 대한심장학회 2014 Korean Circulation Journal Vol.44 No.1
We report a case of a 52-year-old human immunodeficiency virus (HIV)-infected male patient receiving combined antiretroviral therapy(cART), who presented with acute ST-elevation myocardial infarction (STEMI). He was properly treated (e.g., prescribed anti-coagulationdrugs: aspirin, clopidogrel, enoxaparin) and discharged. After 1.5 months, another STEMI related with in-stent thrombosis took place. ThecART scheme was altered, resulting in no further cardiac events in the follow-up period, with undetectable levels of HIV ribonucleic acid. This case highlights the association between HIV infection and the specific drugs of cART, and the risk of cardiovascular disease develop -ment.
Refractive Index and Surface Relief Grating Formation in DNA Based Dye-Doped Films
Alexandrina Tane,Francois Kajzar,Roxana Zgarian,Ileana Rau,Dawid Grabarek,Pawe Karpinski,Andrzej Miniewicz 한국고분자학회 2013 Macromolecular Research Vol.21 No.3
The refractive index and surface relief grating formation in deoxyribonucleic (DNA) based thin films,functionalized with the well known fluorophore LDS698, was studied in holographic two beam coupling geometry and as function of the polarization of incident laser beams. The DNA biopolymer used was functionalized with cetyltrimethylammonium chloride (CTMA) surfactant. If both beams polarization are parallel (p-p) a refractive index grating is formed, as is usually observed, this is also the case when both beams polarizations are perpendicular (sp). This fact is tentatively interpreted as due to the DNA matrix chirality. Also formation of a surface relief refractive index grating is observed in these materials for the first time, in contrary to earlier observations reported in literature. This effect is tentatively explained as due to the creation of an electrostatic bond between DNA and the guest molecules,which are electrically charged.
Marichy, Catherine,Donato, Nicola,Willinger, Marc‐,Georg,Latino, Mariangela,Karpinsky, Dmitry,Yu, Seung‐,Ho,Neri, Giovanni,Pinna, Nicola WILEY‐VCH Verlag 2011 Advanced functional materials Vol.21 No.4
<P><B>Abstract</B></P><P>A new atomic layer deposition (ALD) process for nanocrystalline tin dioxide films is developed and applied for the coating of nanostructured materials. This approach, which is adapted from non‐hydrolytic sol‐gel chemistry, permits the deposition of SnO<SUB>2</SUB> at temperatures as low as 75 °C. It allows the coating of the inner and outer surface of multiwalled carbon nanotubes with a highly conformal film of controllable thickness. The ALD‐coated tubes are investigated as active components in gas‐sensor devices. Due to the formation of a p‐n heterojunction between the highly conductive support and the SnO<SUB>2</SUB> thin film an enhancement of the gas sensing response is observed.</P>
플라즈마 포커스를 이용한 크롬 산화물 박막 성장의 분위기 기체 압력 의존성 연구
정규호,이재갑,임현식,이전국,Jung, Kyoo-Ho,Lee, Jae-Kap,Im, Hyun-Sik,Karpinski, L.,Scholz, M.,Lee, Jeon-Kook 한국재료학회 2007 한국재료학회지 Vol.17 No.6
Chromium oxide thin films have been deposited on silicon substrates using a tabletop 9kJ mathertyped plasma focus (PF) device. Before deposition, pinch behavior with gas pressure was observed. Strength of pinches was increased with increasing working pressure. Deposition was performed at room temperature as a function of working pressure between 50 and 1000 mTorr. Composition and surface morphology of the films were analyzed by Auger Electron Spectroscopy and Scanning Electron Microscope, respectively. Growth rates of the films were decreased with pressure. The oxide films were polycrystalline containing some impurities, Cu, Fe, C and revealed finer grain structure at lower pressure.