Kashif Nisar

Real-time holographic backlighting positioning sensor for enhanced power coupling efficiency into selective launches in multimode fiber

This paper presents a qualitative, real-time backlighting positioning sensor for the alignment of an optical beam to a minutely deviated diffraction order axis to increase the power coupling efficiency into a multimode fiber in selective launches. Results show that the technique facilitates the alignment of the lenses to the first diffraction order axis and improves the power coupling efficiency into a multimode fiber.

Greening emerging IT technologies: techniques and practices

The tremendous increase in global industrial activity has resulted in high utilization of natural energy resources and increase in global warming over the last few decades. Meanwhile, computing has become a popular utility of modern human lifestyle. With the increased popularity of computing and IT services, the corresponding energy consumption of the IT industry has also increased rapidly. The computing community realizes the importance of green measures and provides technological solutions that lead to its energy-aware operations along with facilitating the same in other IT enabled industries. Green and sustainable computing practices review the environmental impact of the computing industry to encourage the adoption of practices and technologies for efficient operations. “Green Computing” paradigm advocates the energy-proportional and efficient usage of computing resources in all emerging technologies, such as Big Data and Internet of Things (IoT). This article presents a review of green computing techniques amidst the emerging IT technologies that are evident in our society. The best practices for green computing and the trade-off between green and high-performance policies is debated. Further, we discuss the imminent challenges facing the efficient green operations of emerging IT technologies.

On the cache performance of the information centric network

The current Internet model has proved more sustainable then the provisioned capacity at the time when the architecture was designed. The voluminous growth of traffic over the Internet has brought challenges for the exiting networking architecture. The information centric paradigm appears to offer efficient solution towards content dissemination model. It is a content-focused networking paradigm rather than host-to-host communication. Caching is one of the major components of information centric networks. This paper is intended to explore the impact of cache on critical attributes of networks. We have made a comparative analysis of in-network and edge network caching mechanism using network simulation. The results proved that in-network caching mechanism is far better than network edge caching with improved throughout, increase link capacity to avoid congestion.

A new model of application response time for VoIP over WLAN and fixed WiMAX

The Voice over Internet Protocol (VoIP) and Wireless Local Area Networks (WLANs) has observed the fastest growth in the world of communication. The WLAN is the most assuring of technologies among the wireless networks, which has facilitated high-rate voice services at low cost and good flexibility over IP-based networks. Worldwide Interoperability for Microwave Access (WiMAX) technology is also a preliminary step to develop Fourth Generation networks (4G) technologies. WiMAX is a recent wireless broadband standard that has promised high bandwidth over long-range transmission. The standard specifies the air interface, including the Medium Access Control (MAC) and Physical (PHY) layers, of Broadband Wireless Access (BWA). It has not only succeeded in the utilization of several of the latest telecommunication techniques in the form of unique practical standards, but also paved the way for the quantitative and qualitative developments of high-speed broadband access. The Institute of Electrical and Electronics Engineers (IEEE 802.16) Standard introduces several advantages; one of them is support for Quality of Services (QoS) at the Media Access Control (MAC) level. However, the existing VoIP over WLAN and WiMAX architecture does not provide sufficient QoS in both networks. In this paper we provide an overview and develops a new distributed model to improve QoS performance for VoIP over WLAN and Fixed WiMAX network with respect to Application Response Time (ART). The model was simulated in the OPNET modeler (16.0) with Multiple Access Points (APs), Base Stations (BSs)as well as mobile devices, Subscribers Stations (SSs), and some server BSs that were selected based on Nearest Neighborhood Algorithm and Orthogonal Frequency Division Multiplexing (OFDM) techniques. The results obtained from this proposed model showed significant performance in network application response time.

Performance Studies of Integrated Network Scenarios in a Hospital Environment

Hospital network is evolving towards a more integrated approach by interconnecting wireless technologies into backbone networks. Although various integrated network scenarios have been published in the networking literature, a generic hospital model has not yet been fully explored and it remains a challenging topic in practice. One of the problems encountered by network practitioners is the seamless integration of network components into healthcare delivery. A good understanding of the performance of integrated networks is required for efficient design and deployment of such technologies in hospital environments. This research paper discuss on the modelling and evaluation of integrated network scenarios in hospital environments. The impact of traffic types e.g. data, voice and video, traffic load, network size and signal strength on network performance is investigated by simulation. Three piloted case studies look at client performance in radiology Accident and Emergency A & E and Intensive Care Unit ICU scenarios. Each scenario reflects the need for various traffic types that end up distinct network behaviours. In the radiology scenario, email and File Transfer Protocol FTP traffic is found to perform well for medium-to-large networks. In the A & E scenario, Voice over Internet Protocol VoIP traffic is shown to generate very limited jitter and data loss. The performance is aligned with the Quality of Service QoS requirements. In the ICU scenario, the performance of video conference degrades with network size, thus, a QoS-enabled device is recommended to reduce the packet delay and data loss. IEEE 802.11a suits in hospital environment because it mitigates interference on the 2.4GHz band where most wireless devices operate.

A Smart Home Model Using Android Application

Smart Home Models are used to monitor and control home appliances through various methods, such as ZigBee, Bluetooth, and SMS. With the rapid growth of technology, the smart home model based on the Android application is designed using Android Smartphones. The smart home model will be able to ease the effort of physically challenged individuals in controlling their home appliances, such as lamps, fan, and Television. Simulation method in this research paper is done by Proteus simulator and Android Software (IDE). This paper presents a survey of all the existing systems and studies their features. This paper also shows how to simulate the smart home model using Arduino Uno.

A Model New for Smart Home Technologies Knee Monitor and Walking Analyser

Over the past century, in the most developed and rapidly developing countries, there has been a continuous increase in life expectancy primarily due to improvements in public health, nutrition, and medicine. However, this is now in parallel with aging population demographics and falling birth rates, which when combined, are expected to significantly burden the socio-economic well-being of many of these countries. In fact, never in human history have we been confronted with such a large aging population, nor have we developed solid, cost-effective solutions their healthcare and social needs, as well as the well-being of the elderly. In this paper, we will describe an ongoing project in Ubiquitous (U)-Healthcare - a smart medical home. In our research work, we are using advances in Information Technology (IT), wireless communication, web-based technologies, and autonomics, to develop new, smart, and cost-effective solutions for the health wellness of the elderly. Such a solution would enable the elderly to lead independent lifestyles in their own homes while being continuously, non-invasively, and non-intrusively monitored for the early detection of symptoms, so diseases can be treated in the early stages; to promote health wellness; as well as to treat chronic illnesses. In this research paper, through a few examples, we will discuss our ongoing work and the challenges we have uncovered, plus some of the research issues we are pursuing. We will particularly focus on the critical role of IT in developing innovative, low-cost, and high impacting solutions to the pending elderly demographic crisis. Several examples will be given to highlight IT for U-Health.

On-Demand DTN Communications in Heterogeneous Access Networks Based on NDN

With the development of wireless communication technologies, the mobile terminal can be installed with more than one wireless interfaces to support its flexible roaming and vertical handover between heterogeneous access networks. Traditionally, the ongoing session has to be re-established when the multi-interface terminal hands over vertically while maintaining the Delay Tolerant Networking (DTN) communication. In this paper, a novel solution is proposed to efficiently support the on-demand DTN communication under the heterogeneous access networks based on Named Data Networking (NDN) architecture.

Smart home for elderly living using Wireless Sensor Networks and an Android application

A Smart Home (SH) is a house or an apartment equipped with advanced automation technologies to provide the occupants with intelligent monitoring and actionable information that can be situation specific. It allows for improvements in the way we live or work, and for improved energy efficiencies. The smart home is especially relevant for the elderly because the intelligent sensing systems would allow for remote monitoring and possibly control of health and environmental parameters according to their health status and living needs. The burgeoning elderly population and rising costs of elderly healthcare and home needs have led to a rapid evolution of the elderly smart living environment. However, the lack of proper eldercare smart home technologies has inspired us to develop Information and Communication Technologies (ICT) based smart home for the elderly using the Android platform. We have proposed a model for the elderly using Wireless Sensor Networks (WSNs) implemented as an Android application. Our smart home research potentially allows the elderly to continue to live in their own homes while being monitored non-invasively, seamlessly and economically according to their healthcare needs and status.

A Holistic Approach in Developing an Ensemble Mobile Peer-to-Peer Computing

The tremendous growth of mobile computing in recent years has created a lot of interesting potentials for digital economy activities. However, the mobile computing constitutes of various complexities in many forms or types. These heterogeneities have posed various challenges in creating an ensemble environment where multiple heterogeneous mobile devices can communicate smoothly and coherently. These include various mobile platforms, battery life-time, screen sizes, radio access technologies, etc. Couple with other mobile platform requirements; security, forensic tool, resource management, mobile application support, etc. will create great challenges in developing digital economy applications in an ensemble mobile peer-to-peer platform. This paper presents significant issues in our holistic approach of overcoming these challenges. We also elaborate our ideas and plans in approaching some challenges of the issues in this ensemble mobile computing. We also suggest a couple of application development supports for mobile peer-to-peer communication environment.