Báo cáo hóa học: "Energy consumption and lifetime analysis in clustered multi-hop wireless sensor networks using the probabilistic cluster-head selection method" pdf

... Access Energy consumption and lifetime analysis in clustered multi-hop wireless sensor networks using the probabilistic cluster-head selection method Jinchul Choi and Chaewoo Lee * Abstract Clustering sensor ... clusters and for the cluster-heads, respec- tively. Then, the cluster-heads and the sink node distri- bute the schedules to their cluste...

Ngày tải lên: 20/06/2014, 22:20

... constraint for network upgrading and expanding (Figure 1). Within A-MAC and ASMAC pro- tocols, no common timescale is needed any more, which will free the energy for setting up and maintaining. Furthermore, ... Petrovic, and K. Ramachandran, “A distributed and adaptive signal processing approach to reducing energy consumption in sensor networks, ” in Proceedings of 22nd A...

Ngày tải lên: 22/06/2014, 22:20

... sleep/wake scheduling as minimizing en- ergy consumption or maximizing sensor network lifetime [23]. However, they make quite different assumptions regarding the sensors and the sensor network, and also ... uncertain in each iteration and the maximum value is n, the complexity can be denoted as O(n). Therefore, in each iteration of the merging and ranking phase,...

Ngày tải lên: 21/06/2014, 17:20

... 192 μs). Otherwise, LIFS is used (LIFS = 640 μs). The time computed includes the passive listening of all the nodes involved in the proxy searching process. When the probability of sharing a secret ... Communications Maga- zine, vol. 40, no. 8, pp. 102–114, 2002. [2] C. Karlof and D. Wagner, “Secure routing in wireless sensor networks: attacks and countermeasures,” in...

Ngày tải lên: 21/06/2014, 22:20

... transport (ESRT) in wireless sensor networks [12] uses change in local buffer level of a node during consecutive intervals to predict congestion resulting in a decrease in the reporting rate by the sink. In ... event to the sink in order to provide the same per-node throughput at the sink. Therefore, sensor nodes within a single flow adjust their reporting rates i...

Ngày tải lên: 21/06/2014, 23:20

... Realisti- cally, the sensors typically work in harsh environments and therefore, fading and noise should be taken into account. The problem of fusing sensor decisions over noisy and fading channels ... stands for the right-hand side of the complex plane. The BER at the FC for the GLRT decision rule can be readily obtained by combining (14 )and( 19). 4. OPTIMIZATION OF...

Ngày tải lên: 22/06/2014, 19:20

... was measured using two instruments, the 15D and the GHQ-12. The 15D instrument measures 15 dimensions including mobility, vision, hearing, breath- ing, sleeping, eating, speech, elimination, usual ... 2000 and July 2001. The two-stage stratified cluster sampling design was planned by Statistics Finland. The sampling frame comprised adults aged 30 years and over living in m...

Ngày tải lên: 18/06/2014, 19:20

... to the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analyses. Study concept and design: CA and OB. Acquisition of data: CA and OB. Analysis ... activity) and impair- ment of energy availability (with reduction in intracellu- lar phosphate and mitochondrial oxygen consumption) and metabolism (including...

Ngày tải lên: 19/06/2014, 08:20

... their preferred speed. In order to reach the first platform with the right foot and the second platform with the left foot, for each subject the starting point was identified and located on the ... to the subject's weight and to the walking velocity were calculated as kinetic parameters in order to investigate the push-off ability during the propulsive phase...

Ngày tải lên: 19/06/2014, 10:20

... flurbiprofen, indomethacin) reduced brain inflammation and Aβ levels in addition to the dep- osition of Aβ in brain [13,14]. Despite this evidence, and the considerable theoretical and therapeutic interest, ... as inflammation. Thus, we observed that this antioxidant further suppressed both amyloidosis and brain inflammation when combined with indomethacin. In summary, our f...

Ngày tải lên: 19/06/2014, 22:20