Indian Institute of Technology Palakkad&nbsp;(IIT Palakkad or IIT PKD) is a public autonomous&nbsp;engineering&nbsp;and&nbsp;research&nbsp;institute located in&nbsp;Palakkad,&nbsp;Kerala. It was&nbsp;one of the five new&nbsp;IITs&nbsp;proposed in the&nbsp;2014 Union budget of India. The campus was inaugurated on 3 August 2015. The institute has 94 faculty, 978 students, and 63 non-teaching staffs.

IT Palakkad currently offers four-year Bachelor of Technology (B.Tech) and two years MS programmes in 8 different engineering disciplines including&nbsp;Computer Science, Electrical, Mechanical, Civil among others.

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IIT Palakkad

This paper presents a robust nonlinear control scheme for task-space trajectory control for an autonomous underwater vehicle- manipulator system (AUVMS) based on an improved proportional integral derivative (PID) control scheme used for deep-sea intervention tasks. A planar underwater vehicle manipulator system (consists of an underwater vehicle and two link rotary (2R) serial planar manipulator) with dynamic coupling between them is considered for the study and numerical simulation. The actuator and sensor dynamics of the system are also considered. The proposed controller integrates the known approximated inverse dynamic model output as a model-base portion of the controller; uses a feed forward term to enhance the control activity with indulgence from known desired acceleration vector; carries an estimated perturbed term to compensate for the unknown effects namely external disturbances and un-modelled dynamics and a decoupled nonlinear PID controller as a feedback portion to enhance closed-loop stability and account for the estimation error of uncertainties. The primary objective of the proposed control scheme is to track the given end-effector task-space trajectory despite of external disturbances, system uncertainties and internal noises associated with the AUVMS system, which show the robustness of the proposed control scheme. Simulation results confirmed that the AUVMS can successfully track the given desired spatial trajectory. © 2015 IEEE.

World University root node

Department of Mechanical Engineering

IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM

Robust nonlinear task space position tracking control of an autonomous underwater vehicle-manipulator system

A novel heuristic approach to resource estimation and target determination in interrupted and shortened Twenty20 cricket matches is presented. The present approach mimics Kleiber's allometric relation to define the effective resources for a team. Unlike existing methods, the present methodology computes the resources using a simple non-statistical method to decide on the revised target, called the Kleiber target, in interrupted matches. The proposed approach is applied to a wide range of real-match scenarios involving one or more interruptions. Case studies show that the Kleiber target is consistent and reasonable over a spectrum of match situations and offers an inexpensive, robust and elegant methodology to reset targets in shortened Twenty20 matches. © 2015 Institution of Mechanical Engineers.

Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology

Bio-allometry inspired resource estimation in Twenty20 cricket

A generic methodology for the design of interface capturing schemes for immiscible multi-fluid flows using the VOF (Volume-Of-Fluid) approach is outlined. Interface capturing schemes are devised as a blend of high-resolution and compressive schemes and their efficiency and accuracy are dependent on the choice of the constituent schemes and the blending function. On the basis of a set of design principles proposed in this work, we show that interface capturing schemes proposed in literature may be encompassed into a single class of GPL (Generalised Piecewise Linear)-κ schemes allowing for a unified approach for development of such schemes. This methodology is used to de-construct four existing schemes and to propose two new schemes for interface capture in an unstructured finite volume framework. The schemes are tested on challenging advection problems using both structured and unstructured grids to evaluate their performance. The new schemes perform as well as existing schemes and even outperform them on unstructured grids, while also exhibiting near Courant number independence for all test problems and grid topologies. The CUIBS (Cubic Upwind Interpolation based Blending Scheme) proposed in the study shows the best performance among all interface capturing schemes discussed herein and is applied to the study of immiscible binary fluid flows. Numerical simulations of viscous sloshing in a tank and Rayleigh-Taylor instability demonstrate the ability of the CUIBS scheme to resolve fluid-fluid interfaces with minimal diffusion. © 2014 Elsevier Ltd.

Computers and Fluids

A generic framework for design of interface capturing schemes for multi-fluid flows

As machine learning techniques mature and are used to tackle complex scientific problems, challenges arise such as the imbalanced class distribution problem, where one of the target class labels is under-represented in comparison with other classes. Existing oversampling approaches for addressing this problem typically do not consider the probability distribution of the minority class while synthetically generating new samples. As a result, the minority class is not represented well which leads to high misclassification error. We introduce two probabilistic oversampling approaches, namely RACOG and wRACOG, to synthetically generating and strategically selecting new minority class samples. The proposed approaches use the joint probability distribution of data attributes and Gibbs sampling to generate new minority class samples. While RACOG selects samples produced by the Gibbs sampler based on a predefined lag, wRACOG selects those samples that have the highest probability of being misclassified by the existing learning model. We validate our approach using nine UCI data sets that were carefully modified to exhibit class imbalance and one new application domain data set with inherent extreme class imbalance. In addition, we compare the classification performance of the proposed methods with three other existing resampling techniques.

Department of Data Science

IEEE Transactions on Knowledge and Data Engineering

RACOG and wRACOG: Two probabilistic oversampling techniques

In an attempt to synthesize a zero valent germanium compound, we have carried out the reaction of [(Cp∗RuCO)(GeCl2)]2, 1 with potassium metal that led to the formation of a metallagermoxane [(Cp∗Ru(CO)2Ge)4(μ-O)6], 2. Compound 2 is the first example of a tetrametallagermoxane with an exo-{Cp∗Ru(CO)2} fragment. DFT calculations were used to examine the key intermediates associated with the formation of 2. © 2015 The Royal Society of Chemistry.

Department of Chemistry

Dalton Transactions

All-metallagermoxane with an adamantanoid cage structure: [(Cp∗Ru(CO)2Ge)4(μ-O)6] (Cp∗ = η5-C5Me5)

Ternary content addressable memory (TCAM) is a popular hardware device for quick routing operation and a best solution for applications like packet forwarding and classification. However, the high price and power consumption area unit limiting its quality and flexibility. During this paper, a Low outflow power TCAM design that uses match line technique is planned to scale Minimize the outflow power dissipation of the SRAM cells. The experimental results show that outflow power may be reduced by using UMC 90nm CMOS method with 1.0 offer voltage compared with the traditional TCAM design.

LOW POWER TCAM USING PRE-CHARGE MATCH LINE TECHNIQUE

A large number of studies in the literature have looked at secondary atomization of Newtonian liquids such as n-Heptane, water, ethyl alcohol, mercury and glycerol solutions and ‘drop deformation and breakup regime maps’ have been plotted based on the studies. The aim of the present research is to study the secondary atomization of heated liquids. One of the liquids that was studied is molten beeswax which is a shear-thinning non-Newtonian liquid. A mono-disperse stream generator equipped with a piezo-stack and a heater produced mono-disperse droplets of molten beeswax and their breakup due to cross-flow was captured using backlit imaging. The continuous jet method was used in this study. The Weber number was varied by changing the velocity of air jet and bag breakup, multimode breakup and sheet-thinning breakup were observed in the range studied. © 2015 International Conference on Liquid Atomization and Spray Systems. All rights reserved.

ICLASS 2015 - 13th International Conference on Liquid Atomization and Spray Systems

Studies on secondary atomization of non-newtonian molten droplets

Spray characteristics are considered as influencing factors which determine air-fuel mixing and combustion in a diesel engine combustion chamber. Almost all modern diesel engines are fitted with high pressure common rail injection system and multi-hole injectors. In the present work, spray characteristics are studied for a multi-hole common rail injector with all nozzle holes open and with a single nozzle hole open. This is important as in the characterization of multi-plume dense sprays like diesel, often a single-plume is used by blocking the other nozzle holes. Experiments have been conducted in a constant volume, high pressure and high temperature chamber with various injection pressures and at various ambient conditions. A six-hole injector is considered for the study. The penetration and cone angle of the spray from each hole is measured and the hole-to-hole variation is studied. Later, five holes of the injector are blocked by micro welding and the remaining single-plume has been characterized and compared with multi-plume spray. It has been observed that hole-to-hole variation in respect with spray penetration and cone angle are minimal both at lower and higher temperatures. The study also shows that the penetration length and cone angle of the single-plume matches well with that of the multi-plumes at all pressure and temperature conditions. The spray from the single-hole has been characterized by both Mie scattering and backlit shadow imaging techniques to compare the penetration length and cone angle measured from the two imaging techniques. © 2015 International Conference on Liquid Atomization and Spray Systems. All rights reserved.

Comparison of a single-plume-spray with a multi-plume-spray from a multi-hole common-rail diesel injector

The importance of sequence-defined polymers is evident in highly developed biological systems. As such, their synthetic de novo production with similar macromolecular diversity, efficiency, and speed has been the focus of considerable research. In this brief review, the rationale behind the new synthesis of sequence-defined oligothioetheramides (oligoTEAs) will be placed in context with the accepted methods of peptide and peptoid synthesis, where all methods notably utilize chemical orthogonality in their design. Along with the conceptual design, we will discuss the assembly of oligoTEAs by highlighting the solution-phase kinetics of each orthogonal reaction, the liquid-phase fluorous purification methodology, a proof-of-principle synthesis, and the assembly of a full-length oligomer. Overall, the success of oligoTEAs stems from the rapid orthogonal chemical reactions at each end of the unique N-allyl-N-acrylamide monomer. OligoTEAs seek to contribute and advance the field of sequence-defined polymers by providing additional structural diversity to fundamentally study sequence-structure-function relationships for both material science and biological applications. 1 Introduction 2 Supported Synthesis via Orthogonal Chemistries 3 Conceptual Design of OligoTEA Assembly 4 Proof-of-Principle 5 Synthesis and Characterization of OligoTEAs 6 Conclusion © Georg Thieme Verlag Stuttgart New York Synlett 2015.

Synlett

Sequence-defined oligothioetheramides

Efficient sensing of trace amount nitroaromatic (NAC) explosives has become a major research focus in recent time due to concerns over national security as well as their role as environment pollutants. NO2-containing electron-deficient aromatic compounds, such as picric acid (PA), trinitrotoluene (TNT), and dinitrotoluene (DNT), are the common constituents of many commercially available chemical explosives. In this article, we have summarized our recent developments on the rational design of electron-rich self-assembled discrete molecular sensors and their efficacy in sensing nitroaromatics both in solution as well as in vapor phase. Several π-electron-rich fluorescent metallacycles (squares, rectangles, and tweezers/pincers) and metallacages (trigonal and tetragonal prisms) have been synthesized by means of metal-ligand coordination-bonding interactions, with enough internal space to accommodate electron-deficient nitroaromatics at the molecular level by multiple supramolecular interactions. Such interactions subsequently result in the detectable fluorescence quenching of sensors even in the presence of trace quantities of nitroaromatics. The fascinating sensing characteristics of molecular architectures discussed in this article may enable future development of improved sensors for nitroaromatic explosives. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.