Power Aware Routing in Mobile Ad Hoc Networks

Printing technologies have undergone signficant development because they are an enabler in science and engineering research; they also have significant practical applications in manufacturing. Micro- and nano-printing techniques have found a number of applications in electronics, biotechnology, and material synthesis/patterning. In this review, we look at the important printing methods, including high precision traditional printing methods as well as recently emerging techniques. We also discuss the materials that are printable by these technologies, the challenges for future development, and the applications of micro- and nano-printing.

http://iopscience.iop.org/article/10.1088/0960-1317/24/5/053001/pdf

A review of non-contact micro- and nano-printing technologies

Silicon quantum dots (SiQDs) hold great promise for many future technologies. Silicon is already at the core of photovoltaics and microelectronics, and SiQDs are capable of efficient light emission and amplification. This is crucial for the development of the next technological frontiers—silicon photonics and optoelectronics. Unlike any other quantum dots (QDs), SiQDs are made of non-toxic and abundant material, offering one of the spectrally broadest emission tunabilities accessible with semiconductor QDs and allowing for tailored radiative rates over many orders of magnitude. This extraordinary flexibility of optical properties is achieved via a combination of the spatial confinement of carriers and the strong influence of surface chemistry. The complex physics of this material, which is still being unraveled, leads to new effects, opening up new opportunities for applications. In this review we summarize the latest progress in this fascinating research field, with special attention given to surface-induced effects, such as the emergence of direct bandgap transitions, and collective effects in densely packed QDs, such as space separated quantum cutting.

https://iopscience.iop.org/article/10.1088/0953-8984/26/17/173201/pdf

Silicon quantum dots: surface matters

The journal Mobile Networks and Applications reflects the emerging symbiosis of portable computers and wireless networks, addressing the convergence of mobility, computing and information organization, access and management. In its special issues, the journal places an equal emphasis on various areas of nomadic computing, data management, related software and hardware technologies, and mobile user services, alongside more ‘classical’ topics in wireless and mobile networking. The journal documents practical and theoretical results which make a fundamental contribution.

Mobile Networks and Applications

Among all types of solar cells, multicrystalline silicon (Si) solar cells are the most widely produced. The enhancement of the efficiency of multicrystalline Si solar cells may help broaden the deployment of solar cells worldwide. Here we show that the efficiency of state-of-the-art commercially produced multicrystalline Si solar cells can be enhanced by a simple inkjet printing of Si-quantum-dot (Si-QD) ink at the solar cell surface. It is found that the efficiency enhancement results from both the down-shifting of Si QDs and the antireflection of porous Si-QD films at the solar cell surface. The current results demonstrate that Si-based nanotechnology can facilitate the continuous development of traditional Si solar cells.

Enhancing the Efficiency of Multicrystalline Silicon Solar Cells by the Inkjet Printing of Silicon-Quantum-Dot Ink

Efficiency enhancement of silicon solar cells with silicon nanocrystals embedded in PECVD silicon nitride matrix

A dynamic ad hoc network DANET is a dynamic network of several nodes without any centralised leadership. In DANET, any connecting device and a host is considered as a node. Certain nodes will not take active participation in forwarding messages. In other words, the memory space will not be shared in order to conserve the energy and the resources. Such nodes are called selfish nodes and such nodes are the main reason for reduced data accessibility, query delay and increased communication costs. In this work, selfish nodes are detected by employing evidence based detection. The concern about security is handled by trust authority TA. TA can find the replicated node too, created by an adversary. An improved self-centred friendship ISCF tree is framed and finally, the replica is allocated to the node by taking into account the number of times the data items are accessed and the level of the node. This work outpaces the existing work in terms of selfishness detection accuracy and selfishness detection time in addition to various other factors like data accessibility, query delay and communication cost.

Selfish node detection based on evidence by trust authority and selfish replica allocation in DANET

Nano-arrays of SAM by dip-pen nanowriting (DPN) technique for futuristic bio-electronic and bio-sensor applications

Recent trends in wireless communication show an increase in use of mobile devices to exchange information. Due to frequent mobility, there is a possibility that the devices in the network may move out of the transmission range and may fail to connect to the network. To ensure network connectivity in these situations, researchers have proposed many methodologies to determine optimal location for placing mobile forwarding nodes such as particle swarm optimisation, ant colony etc., that helps in establishing routes effectively. A method that establishes an optimal route using genetic algorithm after determining an effective location using particle swarm optimisation is proposed. The proposed work focuses on integrating the benefits of particle swarm optimisation to determine optimal location for placing mobile forwarding node with genetic algorithm to establish an optimal route to destination. Performance of the proposed methodology when analysed using the simulation studies reveals that the packet drop rate is reduced and throughput is improved significantly.

A swarm intelligence-based approach for addressing network partitioning constraints in mobile ad hoc networks

In this paper, we have considered a model as two serially connected queues M[X]/M/1and M/M/1 queue for cloud computing architecture in healthcare system. The batch of multiple class iusers from the public cloud entering into the queue are naturally based on the FCFS discipline. If the server is free, each user of the batch of multiple class iusers can get service from the first queue, then enter into M/M/1queue with probability ? and leave the system after service completion. Otherwise, leave the system with probability (1-?) without entering onto the second queue. Our proposed work is based on the service request from the public cloud and request management application has been proposed and analysed in terms of waiting time defined as Quality of Service criteria (QoS). The results obtained in our proposed model are the total waiting time, the total number of different class i of users / patients / clients in both queues and in the system.

R. Saravanan

Papers

Efficiency enhancement of silicon solar cells with silicon nanocrystals embedded in PECVD silicon nitride matrix

Selfish node detection based on evidence by trust authority and selfish replica allocation in DANET

Nano-arrays of SAM by dip-pen nanowriting (DPN) technique for futuristic bio-electronic and bio-sensor applications

A swarm intelligence-based approach for addressing network partitioning constraints in mobile ad hoc networks

Performance Analysis of Cloud Computing Using Batch Queueing Models in Healthcare Systems