(SoE) School of Engineering

<p>Shiv Nadar University is a comprehensive, multidisciplinary, research-focused, and student-centric University offering a full range of academic programs at the undergraduate, postgraduate and doctoral level. With state-of-the-art infrastructure, the University comprises of academic wings, sophisticated labs, international standard sports facilities, amphitheaters, auditorium, conference rooms and smart classrooms. The University&rsquo;s goal is to become internationally recognized for the quality of its research and creative endeavors and their applicability to improving quality of life, generating new insights and expanding the boundaries of human knowledge creativity. Committed to excellence in teaching, research and service, the University aims to serve the higher education needs of India and the world beyond.</p>

Shiv Nadar University

In this research paper, a hybrid photovoltaic-thermal (PVT) single slope roof integrated greenhouse solar dryer under natural and forced mode has been tested for climatic condition of New Delhi, India. Thermal modelling of PVT dryer has been experimentally validated under natural and forced mode without load condition. Further, characteristic curves have also been discussed on the basis of thermal efficiency, overall thermal efficiency, overall exergy efficiency and solar cell efficiency including the effect of packing factor and mass flow rate. The thermal energy decreased and the electrical energy increased by 76.39% and 88.73% respectively with increment in packing factor of PV module. It was also found that with increment in mass flow rate, the thermal energy increased by 89.44% and 65.70% for natural and forced mode respectively. © 2016 Elsevier Ltd

Mechanical Engineering

World University root node

Solar Energy

Thermal analysis of photovoltaic-thermal (PVT) single slope roof integrated greenhouse solar dryer

Electrical Engineering

IEEE Transactions on Antennas and Propagation

Comments on 'Theoretical Modeling of a Photoconductive Antenna in a Terahertz Pulsed System'

Acquiring the knowledge about the relationship among friendship network properties and check-in behavior of users (connected in the friendship network) has several benefits such as planning advertising strategies and recommending the friends or places. This paper aims to find the impact of structural patterns hidden in the nodes of a friendship network and external environment changes in the check-in patterns of the users. First, we categorize each spatial check-in event based on its cause into either self reinforcing behavior or social influence or external effect. Then, we explore how network and spatial properties and external factors affect the number of check-ins and influences. Using check-ins data from four major cities/states and its users' friendship graph, we show how network and spatial properties like centrality, network neighborhood overlap, spatial check-ins overlap, strong ties effects the check-ins and influential behavior of individuals. © 2016 IEEE.

Computer Science and Engineering

IEEE International Conference on Data Mining Workshops, ICDMW

Correlating Social Interconnections of Users with Spatio-Temporal Check-Ins Behavior

Hierarchical generative modeling and Monte-Carlo EM in Riemannian shape space for hypothesis testing

Suppression of interference from narrowband frequency signals play vital role in many signal processing and communication applications. A transform based method for suppression of narrow band interference in a biomedical signal is proposed. As a specific example Electrocardiogram (ECG) is considered for the analysis. ECG is one of the widely used biomedical signal. ECG signal is often contaminated with baseline wander noise, powerline interference (PLI) and artifacts (bioelectric signals), which complicates the processing of raw ECG signal. This work proposes an approach using Ramanujan periodic transform for reducing PLI and is tested on a subject data from MIT-BIH Arrhythmia database. A sum (E) of Euclidean error per block (ei) is used as measure to quantify the suppression capability of RPT and notch filter based methods. The transformation is performed for different lengths (N), namely 36, 72, 108, 144, 180. Every doubling of N-points results in 50\% reduction in error (E). © 2016 IEEE.

Fulltext

2016 International Conference on Signal Processing and Communication, ICSC 2016

Removal of narrowband interference (PLI in ECG signal) using Ramanujan periodic transform (RPT)

3G/4G wireless systems employed multiple antennas at both the transmitter and receiver offered significant gains over single-antenna systems. MassiveMIMO (MM) is one of the 5G technologies, which supports to increase the demand for high speed data, capacity, energy efficiency and spectral efficiency. It is known that space-time multiplexing and/or coding offer attractive means of combating fading and increases the capacity in a multi-antenna communication. In this paper, MM downlink scenario is considered. Performance analysis using conventional precoders like Matched Filter (MF), Zero Forcing (ZF), Regularized Beamforming (RBF) and Minimum Mean Square Error (MMSE) with Singular Value Decomposition (SVD) based balanced equalizer are studied in spatio-temporal environment. Signal to Interference Ratio (SINR) and Bit-Error Rate (BER) are used as performance measures. Monte-Carlo simulations are carried out to compute BER and SINR in MATLAB. © 2016 IEEE.

Performance analysis of linear precoders and SVD in downlink MassiveMIMO Frequency selective channels

With the Moore's law drawing in a saturation limit closer for our current technologies in the semiconductor field, the need for efficient technologies better than the present majorly in terms of energy, speed and storage is growing loud every day. Unexpectedly, the key to this solution comes from the past. Memristor thus became the pioneers for opening of such a possibility. A linear ion drift model of memristor was realized along with a memristor based imply logic gate. The analysis were then carried on various parameters affecting its characteristics such as excitation frequency, drift ion mobility, resistances, state function, electrode size and choice of electrode material. This paper presents a theoretical approach to deal with the understanding of parameters making a memristor and controlling it as a switch and also to identify various issues related to its physical realization. © 2015 IEEE.

Proceedings of the 2015 39th National Systems Conference, NSC 2015

Parametric analysis of memristive switching mechanism

Different compilers offer different kind and different level of optimization techniques. These days, scale of applications is increasing rapidly. This increase in scale demands more complex applications to be developed. This results in imbalance of resource capability and application demand. To take maximum of existing resources, compiler optimization techniques are used. There are existing compiler optimization techniques for single core processors. But use of these optimization techniques requires expert level knowledge. Optimization of Compiler means minimization or maximization or various objectives. These objectives may be latency, size, power requirement etc. Importance of these objectives may vary from one application to other. This paper illustrates analysis of existing optimization techniques, which are available for single core processor systems. The speed-up analysis of different applications is performed and architecture level features are extracted. Analysis graphs are generated at the end to show effect of various program features on applicability of optimization techniques. © 2015 IEEE.

Analysis of compiler optimization techniques by using feature mining technique

This paper proposes a novel Active Antenna (AA) has capability of frequency switching. The passive antenna with rectangular slot and frequency splitter is used to design the proposed AA. Two separate networks are designed at two separate frequencies and integrated with three port rectangular slot antenna. PIN Diode switches are used to switch between two networks for achieving frequency switching. The proposed antenna can be used for WLAN applications. © 2015 IEEE.

Proceedings of the 2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation, APCAP 2015

Frequency switchable active antenna

Bandwidth pressure on Ethernet has increased recently because of 3G, 4G, Wi-Fi standards applied to smart phones, tablets, Internet protocol television, social media, gaming etc. Due to above network industries are forced to standardize 100, 400 gigabit Ethernet speeds presently and Terabit Ethernet speeds in near future. According to Moore's law the network bandwidth is doubling every 18 months, and computer bandwidth is doubling every 24 months. This roadmap directs network industry that global network will need 10 Terabit Ethernet by 2020. Such bandwidth achievements are possible either by developing very high speed switches and routers which of course are very costly now, however, significant optical parallelization can provide a low cost solution in present situation. Demand is increasing for more number of PCs, tablets, and smart phones with HD video display day-by-day. Wired entertainment gadgets need complex cabling. To meet above requirements and to avoid complex cabling next generation wireless area networks(WLAN) standards like IEEE802.11ac/ax and 802.11ad can provide very high speed, reliability, and quality. Very high data rates can be obtained using wide frequency bands, high speed processors, and multi-input multi-output antennas. Very high attenuation because of using wide frequency band can be reduced by beam forming using large array of antennas. It results in high reliability at very high speed and wide range. This paper discusses next generation Gigabit Wi-Fi along with wired backhaul with 10, 100, and 400 Gigabit Ethernet extending to Terabit Ethernet which is expected to be available by 2020. © 2016 IEEE.