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IEEE802.15.4 WPAN에서의 Cyclic Contention Free Access 기법
곽원근, 이재용, Kwak. Woon-Geun, Lee. Jai-Yong 한국통신학회 한국통신학회논문지. The Journal of Korea Information and Communications Society. 네트워크 및 서비스 8 Pages
한국통신학회 한국통신학회논문지. The Journal of Korea Information and Communications Society. 네트워크 및 서비스 2007, Vol.32 455-462 (8 pages)
IEEE802.15.4의 비경쟁기반 다중 접속 기법으로 적용된 GTS(Guaranteed Time Slot)의 성능 분석과 문제점 분석을 통해, 개선된 형태의 Cyclic Contention free Access(Cyclic-CFA) 기법을 제안한다. Cyclic-CFA 기법은 Polling 기법을 개선한 스케줄링 방식으로, 장치(device)들은 PAN 코디네이터(coordinator)로부터 부여받은 Sequence Number를 기반으로 순차적으로 데이터를 전송한다. 별도의 Polling 패킷(packet)이 없고 단일방향성(unidirectional)으로 동작하므로, 고전적인 Polling 기법의 오버헤드를 줄일 수 있어 보다... -
Prevention and Intervention of Adolescents’ Maladaptive Internet use
Oh Yeon Ju 경인교육대학교 교육연구원 The Journal of Education 15 Pages
경인교육대학교 교육연구원 The Journal of Education 2019, Vol.2 No.2 1 1-15 (15 pages)
the change in dopamine secretion and resulting stimulation of the pleasure center. There have been four major points of contention concerning the addiction perspective. First, the term addiction results in reducing the serious problem of a medically recognized addiction, such as substance addiction. Second, most studies from an addiction point of view use unverified self-scale. Third, there is... This article presents the characteristics of addiction, cognitive behavior, and social cognitive perspectives, which are the mainstream views of maladaptive Internet use. As the academic branch dealing with mental health, such as psychology and psychiatry, first raised the issue of maladaptive Internet use and continued research, views in the context of mental health, such as addiction and cognitive behavior perspectives, have become mainstream. The mental health perspective, however, shows... -
Conditioning-induced cardioprotection
Puneet Kaur Randhawa, Anjana Bali, Jasleen Kaur Virdi, Amteshwar Singh Jaggi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 13 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2018, Vol.22 No.5 1 467-479 (13 pages)
in the aged cells [65]. This contention is supported by a previous study conducted by Duicu et al. indicat- ing that aging significantly reduces mitochondrial membrane po- tential and increases ROS production. Furthermore, the authors reported that aging markedly increases the mitochondrial sensi- tivity to Ca 2+-induced mPTP opening [66]. Accordingly, it may be proposed that aging may decrease... The aging process induces a plethora of changes in the body including alterations in hormonal regulation and metabolism in various organs including the heart. Aging is associated with marked increase in the vulnerability of the heart to ischemia-reperfusion injury. Furthermore, it significantly hampers the development of adaptive response to various forms of conditioning stimuli (pre/post/remote conditioning). Aging significantly impairs the activation of signaling pathways that mediate... -
Scant Extracellular NAD Cleaving Activity of Human Neutrophils is Down-Regulated by fMLP via FPRL1
Md.AshrafulHasan, Md.TipuSultan, Won-GyunAhn, Yeon-JaKim, Ji-HyeJang, Chang-WonHong, Dong-KeunSong 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2014, Vol.18 No.6 8 497-502 (6 pages)
human neu- trophil functions. This contention is in line with the pre- vious report that extracellular application of as low as 1 μM NAD, but not ADPR, increases [Ca 2+ ]i in human neu- trophils [8]. However, about 25 fold higher concentration of NAD is required for [Ca 2+ ]i increase in human monocytes [9]. Our observation indicates that human monocytes have a much higher extracellular NAD... Extracellular nicotinamide adenine dinucleotide (NAD) cleaving activity of a particular cell type determines the rate of the degradation of extracellular NAD with formation of metabolites in the vicinity of the plasma membrane, which has important physiological consequences. It is yet to be elucidated whether intact human neutrophils have any extracellular NAD cleaving activity. In this study, with a simple fluorometric assay utilizing 1,N6-ethenoadenine dinucleotide (etheno-NAD) as the... -
Effect of Neurosteroid Modulation on Global Ischaemia-Reperfusion-Induced Cerebral Injury in Mice
AmarjotKaurGrewal, AmteshwarSinghJaggi, AvtarChRana, NirmalSingh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.6 2 485-492 (8 pages)
in synthesis of neurosteroids. This contention is further supported by the observation of the study at hand that indomethacin, an in- hibitor of 3α-HSD [18,35] has attenuated the neuro- protective effect of carbamazepine. Carbamazepine has been reported to produce blocka de of sodium channels [30] which may also be contributing to its neuroprotective effect. On the other hand, mexiletine , a... The present study was designed to investigate the putative effect of neurosteroid modulation on global ischaemia-reperfusion-induced cerebral injury in mice. Bilateral carotid artery occlusion followed by reperfusion, produced a significant rise in cerebral infarct size along with impairment of grip strength and motor coordination in Swiss albino mice. Administration of carbamazepine (16 mg/kg, i.p.) before global cerebral ischaemia significantly attenuated cerebral infarct size and improved the... -
Effects of Erythropoietin on Memory Deficits and Brain Oxidative Stress in the Mouse Models of Dementia
RohitKumar, AmteshwarSinghJaggi, NirmalSingh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.5 15 345-352 (8 pages)
rationale for treatment of de- mentia closely related to AD (Becker, 1991) and support the use of animal models using muscarinic receptor antago- nists (Yamazaki et al, 1995). This contention is further sup- ported by our study, whereby a significant impairment of learning and memory in mice treated with scopolamine has been observed. Moreover, scopolamine treatment also pro- duced a... The present study was undertaken to explore the potential of erythropoietin in memory deficits of mice. Memory impairment was produced by scopolamine (0.5 mg/kg, i.p.) and intracerebroventricular streptozotocin (i.c.v STZ, 3 mg/kg, 10Ռl, 1st and 3rd day) in separate groups of animals. Morris water- maze test was employed to assess learning and memory. The levels of brain thio-barbituric acid reactive species (TBARS) and reduced glutathione (GSH) were estimated to assess degree of oxidative... -
Ceramide is involved in MPP+-induced Cytotoxicity in Human Neuroblastoma Cells
Eun-JooNam, Hye-SookLee, YoungJaeLee, Wan-SeokJoo, SunghoMaeng, Hye-InIm, Chan-WoongPark, YongSikKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.6 1 281-286 (6 pages)
of CAPP, strongly supports the contention that CAPP activity is tightly coupled to the elevation of intracellular ceramide levels. Recently, Brugg et al. (1996) showed that ceramide plays a role in TNF- α-induced apoptosis of dopaminergic neurons cultured from mesencephalon, the most vulnerable region of neuronal degeneration in PD. In this study, we investigated the involvement of a novel... To understand the cytotoxic mechanism of MPP, we examined the involvement of ceramide in MPP- induced cytotoxicity to human neuroblastoma SH-SY5Y cells. When SH-SY5Y cells were exposed to MPP, MPP induced dose-dependent cytotoxicity accompanied by 2-fold elevation of intracellular ceramide levels in SH-SY5Y cells. Three methods were used to test the hypothesis that the elevated intracellular ceramide is related to MPP-induced cytotoxicity: C2-ceramide was... -
Calcium Modulates Excitatory Amino Acid (EAA)- and Substance P-induced Rat Dorsal Horn Cell Responses
HongKeeShin, SokHanKang, InDukChung, KeeSoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 5 35-45 (11 pages)
and ofset DISCUSSION Many experimental findings suggest that NMDA and SP are implicated in the processing of nociceptive informations in the spinal cord. The evidence which supports this contention includes 1) high density of their binding sites in superficial layers of dorsal hom where the nociceptive primary afferent fibers ter minate (Henley et al， 1993; Marshall et al， 1996)， 2)... Excitatory amino acid (EAA) and substance P (SP) have been known to be primary candidates for nociceptive neurotransmitter in the spinal cord, and calcium ions are implicated in processing of the sensory informations mediated by EAA and SP in the spinal cord. In this study, we examined how Ca2 modified the responses of dorsal horn neurons to single or combined iontophoretical application of EAA and SP in the rat. All the LT cells tested responded to kainate, whereas about 55% of low... -
Effect of Nifedipine on Endocrine and Cardiovascular Responses to Angiotensin II in SHR Fed with Different Sodium Diets
Choi, Eun-Kyung, Park, Yoon-Yub, Ahn, Dong-Kuk, Park, Jae-Sik, Lee, Won-Jung 대한생리학회 대한생리학회지 10 Pages
대한생리학회 대한생리학회지 1993, 제 27권 제 1호 6 57-66 (10 pages)
the Ang II-stimulated ANP secretion close to the basal level. In contrast, al- dosterone release and pressor response to Ang II were only partially inhibited by nifedipine. Our results support the contention that a calci- um-dependent mechanis~ is a part of the physiological responses to Ang II, but indicate the existance of local differences in Ang II mechanisms at specific target cells suc... Effects of a voltage dependent calcium channel antagonist, nifedipine, on the responses of blood pressure, and secretion of atrial natriuretic peptide (ANP) and aldosterone to angiotensin II (Ang II) were compared in male Wistar and spontaneously hypertensive rats (SHR). A low, control or high sodium diet (2, 10 or 25 mmol Na/100 g diet) was fed for 6 weeks from the age of 6 weeks. On the morning of the experiment catheters were inserted under ether anesthesia in the femoral artery for pressure... -
Implementation Of 802.15.4 Wireless Sensor Network in Real-time Monitoring and Control System for GreenHouse
Jaypal Baviskar, Afshan Mulla, , Amol Baviskar, Jeet Desai 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 19 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2015, 제 5권 제 5호 10 87-105 (19 pages)
bandwidth to achieve low latency [11]. such application should get some dedicated bandwidth and guaranteed time slots on deterministic basis instead of probabilistic one. This is possible in Contention Free Period (CFP) only. PAN coordinator can allocate such slots (maximum 7) known as guaranteed time slots (GTSs) which forms the CFP. Sometimes channel access can be denied because of low... In order to meet the increasing need for quality conscience crops and to utilize the resources efficiently, the concept of Greenhouse was introduced. It assists in accurate monitoring and controlling of various parameters, in order to nurture healthy crops. In this paper efforts are made to acknowledge the problems associated with maintaining precise environmental conditions, and to implement a sophisticated system to supervise the real-time monitoring and controlling operation inside the...