Hybrid wireless mesh networks are the most generic types of wireless mesh networks. Unlike static mesh routers, which have multiple radio interfaces and almost no energy constraint, mobile mesh clients are usually equ...
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Hybrid wireless mesh networks are the most generic types of wireless mesh networks. Unlike static mesh routers, which have multiple radio interfaces and almost no energy constraint, mobile mesh clients are usually equipped with a single radio interface and have energy limitations. A cooperative hybrid routing protocol (CHRP) combining advantages of proactive and reactive routing protocols by letting them work cooperatively is proposed in this paper, which can adapt to features of both routers and clients. In CHRP, in order to make a proper route selection, channel condition, interference and constrained energy of clients are considered in the node-aware routing metric. Besides, a cross-layer approach is used in CHRP. Both gateway and client oriented data flows are considered comprehensively. The simulation results using ns-3 show the advantage of the proposed CHRP in terms of average packet loss rate, average latency, average network throughput, average energy consumption of clients and the minimum residual energy of clients.
Eu(ii) complexes with characteristic d-f transitions demonstrate their potential applications in organic light-emitting diodes (OLEDs) due to their advantages including short excited-state lifetimes, 100% theoretical ...
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Eu(ii) complexes with characteristic d-f transitions demonstrate their potential applications in organic light-emitting diodes (OLEDs) due to their advantages including short excited-state lifetimes, 100% theoretical exciton utilization efficiency and tunable emission colors. Thermally stable and efficient Eu(ii) complexes are necessary for blue OLEDs, which are still the bottleneck as compared to red and green OLEDs. A blue-emitting Eu(ii) complex can be obtained by appropriate ligand design because the 5d energy levels are sensitive to the external environments. Herein, a series of Eu(ii) complexes based on tris(pyrazolyl)borate ligands were designed and synthesized. By carefully adjusting the steric hindrance, a thermally stable sky-blue emission Eu(ii) complex bis[hydrotris(3-tert-butylpyrazolyl)borate]europium(ii) (Eu-tBu) was obtained by employing the bulky tert-butyl group. The sky-blue OLED based on Eu-tBu was fabricated, showing a maximum external quantum efficiency of 15.7%, a maximum luminance of 52 240 cd m(-2), and Commission Internationale del Eclairage coordinates of (0.13, 0.27) at 1000 cd m(-2).
The article describes concerns about the meta-analytic review by H. Baumeister, N. Hutter and J. Bengel on the effects of psychological and pharmacological interventions for depression in patients with diabetes mellit...
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The article describes concerns about the meta-analytic review by H. Baumeister, N. Hutter and J. Bengel on the effects of psychological and pharmacological interventions for depression in patients with diabetes mellitus. Topics discussed include the authors' belief that the forest plot summarizing the effects of pharmacological interventions against placebo on depression is incorrect and their concern about the secondary outcome measure of the study, the health-related quality of life.
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