110 research outputs found
Optimizing Average-Maximum TTR Trade-off for Cognitive Radio Rendezvous
In cognitive radio (CR) networks, "TTR", a.k.a. time-to-rendezvous, is one of
the most important metrics for evaluating the performance of a channel hopping
(CH) rendezvous protocol, and it characterizes the rendezvous delay when two
CRs perform channel hopping. There exists a trade-off of optimizing the average
or maximum TTR in the CH rendezvous protocol design. On one hand, the random CH
protocol leads to the best "average" TTR without ensuring a finite "maximum"
TTR (two CRs may never rendezvous in the worst case), or a high rendezvous
diversity (multiple rendezvous channels). On the other hand, many
sequence-based CH protocols ensure a finite maximum TTR (upper bound of TTR)
and a high rendezvous diversity, while they inevitably yield a larger average
TTR. In this paper, we strike a balance in the average-maximum TTR trade-off
for CR rendezvous by leveraging the advantages of both random and
sequence-based CH protocols. Inspired by the neighbor discovery problem, we
establish a design framework of creating a wake-up schedule whereby every CR
follows the sequence-based (or random) CH protocol in the awake (or asleep)
mode. Analytical and simulation results show that the hybrid CH protocols under
this framework are able to achieve a greatly improved average TTR as well as a
low upper-bound of TTR, without sacrificing the rendezvous diversity.Comment: Accepted by IEEE International Conference on Communications (ICC
2015, http://icc2015.ieee-icc.org/
The Reform of Human Resource System in the Public Sector under the New Public Management System
The work presented in this paper focuses on New Public Management (NPM) and the public human resource management system. New Public Management (NPM), which has been used in the West for a number of years, is currently being implemented in China to manage various government departments. China is aware of the benefits that NPM may bring to the management of the government. In the context of New Public Management, departments of public human resources will also need to undergo transformations in order to improve talent management and recruitment efforts. This paper identifies the problems with public sector human resource management, including but not limited to the following: the focus of Chinese public sector personnel on achieving public sector goals at the expense of personal goals; the unfairness of recruitment principles due to human relations, which is not conducive to the rational allocation of talent and leads to brain drain; and the outdated management style, problematic promotion system, and inadequate incentives in China's public administration. Increasing the effectiveness of the performance evaluation process is one way to solve these shortcomings. These deficiencies can be rectified by enhancing the performance appraisal mechanism, establishing a flexible system for workers, and aiming for maximum efficiency in order to improve the difficulties in the public sector. This paper offers some references for the improvement of talent management in public organizations
ANALYSIS ON THE INFLUENCE OF COLLEGE TEACHERSâ PROFESSIONAL IDENTITY PSYCHOLOGY ON JOB PERFORMANCE
ANALYSIS ON THE INFLUENCE OF COLLEGE TEACHERSâ PROFESSIONAL IDENTITY PSYCHOLOGY ON JOB PERFORMANCE
A Survey of Blockchain Applications in Different Domains
Blockchains have received much attention recently since they provide
decentralized approaches to the creation and management of value. Many banks,
Internet companies, car manufacturers, and even governments worldwide have
incorporated or started considering blockchains to improve the security,
scalability, and efficiency of their services. In this paper, we survey
blockchain applications in different areas. These areas include cryptocurrency,
healthcare, advertising, insurance, copyright protection, energy, and societal
applications. Our work provides a timely summary for individuals and
organizations interested in blockchains. We envision our study to motivate more
blockchain applications.Comment: Published in Proceedings of the 2018 International Conference on
Blockchain Technology and Application (ICBTA
Solid lipid nanoparticle suspension enhanced the therapeutic efficacy of praziquantel against tapeworm
Hydatid disease caused by tapeworm is an increasing public health and socioeconomic concern. In order to enhance the therapeutic efficacy of praziquantel (PZQ) against tapeworm, PZQ-loaded hydrogenated castor oil solid lipid nanoparticle (PZQ-HCO-SLN) suspension was prepared by a hot homogenization and ultrasonication method. The stability of the suspension at 4°C and room temperature was evaluated by the physicochemical characteristics of the nanoparticles and in-vitro release pattern of the suspension. Pharmacokinetics was studied after subcutaneous administration of the suspension in dogs. The therapeutic effect of the novel formulation was evaluated in dogs naturally infected with Echinococcus granulosus. The results showed that the drug recovery of the suspension was 97.59% ± 7.56%. Nanoparticle diameter, polydispersivity index, and zeta potential were 263.00 ± 11.15 nm, 0.34 ± 0.06, and â11.57 ± 1.12 mV, respectively and showed no significant changes after 4 months of storage at both 4°C and room temperature. The stored suspensions displayed similar in-vitro release patterns as that of the newly prepared one. SLNs increased the bioavailability of PZQ 5.67-fold and extended the mean residence time of the drug from 56.71 to 280.38 hours. Single subcutaneous administration of PZQ-HCO-SLN suspension obtained enhanced therapeutic efficacy against tapeworm in infected dogs. At the dose of 5 mg/kg, the stool-ova reduction and negative conversion rates and tapeworm removal rate of the suspension were 100%, while the native PZQ were 91.55%, 87.5%, and 66.7%. When the dose reduced to 0.5 mg/kg, the native drug showed no effect, but the suspension still got the same therapeutic efficacy as that of the 5 mg/kg native PZQ. These results demonstrate that the PZQ-HCO-SLN suspension is a promising formulation to enhance the therapeutic efficacy of PZQ
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