Hybrid network combining PLC and IEEE802.16 for hospital environment

This paper presents a novel hospital network which delivers broadband with Quality of Service (QoS) guaranteed by IEEE 802.16/WiMAX and Power Line Communication (PLC) systems. Through the utilization of the QoS features of IEEE 802.16 and PLC systems jointly, the proposed system enables simultaneous transmission of various types of medical data traffic while remaining the advantages of operation flexibility and low deployment cost. Performance is evaluated to demonstrate that the proposed network not only provides throughput guarantee, but also considers QoS requirement of the medical applications

Study on the Contribution of Seaport to Urban Economy: An Empirical and Quantitative Analysis of Xiamen Port

Ports play a vital role in the development of cities. In order to study the contribution of seaports to the urban economy, this paper uses the input–output method and multiplier theory to calculate the direct, indirect, and ripple economic contribution of ports to cities. Then, this paper selects Xiamen Port as an example to calculate the economic contribution. Xiamen Port is a major port on the southeast coast of China and an important node of the 21st Century Maritime Silk Road. It can provide a reference for other port cities. A more detailed index system for evaluating the economic contribution is also constructed. Next, the time series ARIMA model is used to predict the cargo throughput and container throughput of Xiamen Port in the next four years. Finally, there are some suggestions put forward for the development of Xiamen Port. The results show the total economic contribution of Xiamen Port to the city accounted for 10.48% of the city’s GDP in 2017. Direct, indirect, and ripple economic contributions accounted for 2.84%, 2.13%, and 5.51%, respectively. The contribution of Xiamen Port to the city is in line with the growth pole theory, which not only allows for rapid growth in Xiamen Port itself but also drives the development of the entire region through the multiplier effect. The cargo throughput and container throughput of Xiamen Port will maintain continuous growth in the next four years. Therefore, the development of Xiamen Port should be accelerated to enhance its economic contribution to the city

Brain Membrane Proteome and Phosphoproteome Reveal Molecular Basis Associating with Nursing and Foraging Behaviors of Honeybee Workers

The brain is a vital organ in regulating complex social behaviors of honeybees including learning and memory. Knowledge of how brain membrane proteins and their phosphorylation underlie the age-related behavioral polyethism is still lacking. A hitherto age-resolved brain membrane proteome and phosphoproteome were reported in adult worker bees from two strains of honeybee (<i>Apis mellifera ligustica</i>): Italian bee (ITB) and Royal Jelly bee (RJB), a line selected from ITB for increased RJ outputs over four decades. There were 1079 membrane protein groups identified, and 417 unique phosphosites were located in 179 membrane protein groups mainly phosphorylated by kinase families of MAPKs, CDKs, and CK2. Age-resolved dynamics of brain membrane proteome and phosphoproteome are indicative of their correlation with the neurobiological requirements during the adult life of honeybee workers. To stimulate immature brain cell development in newly emerged bees (NEBs), the enriched functional classes associated with metabolism of carbohydrates, nucleosides, and lipids by the up-regulated proteins suggest their enhanced role in driving cell maturity of the brain. In nurse bees (NBs) and forager bees (FBs), a higher number of membrane proteins and phosphoproteins were expressed as compared with in the young stages, and the enriched signal-transduction-related pathways by the up-regulated proteins suggest their significances in sustaining the intensive information processing during nursing and foraging activities. Notably, RJB has shaped unique membrane proteome and phosphoproteome settings to consolidate nursing and foraging behaviors in response to decades of selection underpinning the elevated RJ yields. In RJB NBs, the enriched pathways of phosphatidylinositol signaling and arachidonic acid metabolism indicate a stronger olfaction sensation in response to larval pheromone stimulation. In RJB FBs, the enriched pathways related to signal processing such as SNARE interactions in vesicular transport, wnt signaling, TGF-beta signaling, and taurine and hypotaurine metabolism suggest an enhanced nerve sensitivity to prime the stronger tendency to pollen collection. Our data gain a novel insight into membrane proteome and phosphoproteome-driven cerebral regulation of honeybee behaviors, which is potentially useful for further neurobiological investigation in both honeybees and other social insects

Room-temperature direct synthesis of semi-conductive PbS nanocrystal inks for optoelectronic applications

Lead sulphide (PbS) nanocrystals (NCs) are promising materials for low-cost, high-performance optoelectronic devices. So far, PbS NCs have to be first synthesized with long-alkyl chain organic surface ligands and then be ligand-exchanged with shorter ligands (two-steps) to enable charge transport. However, the initial synthesis of insulated PbS NCs show no necessity and the ligand-exchange process is tedious and extravagant. Herein, we have developed a direct one-step, scalable synthetic method for iodide capped PbS (PbS-I) NC inks. The estimated cost for PbS-I NC inks is decreased to less than 6 $.g(-1), compared with 16$.g(-1) for conventional methods. Furthermore, based on these PbS-I NCs, photo-detector devices show a high detectivity of 1.4 x 10(11) Jones and solar cells show an air-stable power conversion efficiency (PCE) up to 10%. This scalable and low-cost direct preparation of high-quality PbS-I NC inks may pave a path for the future commercialization of NC based optoelectronics