The present study deals with improvement of corrosion resistance of a low alloy–high carbon steel by pulsed direct current glow discharge mode plasma nitriding. During the nitriding, applied voltage was 540–710 V which resulted in 3–6 A current in the temperature range 450–560°C for a time span of 1–5 hours. The phases formed after nitriding and their morphology were characterized by XRD and SEM analysis. Mostly γ′-Fe4N with a small volume fraction of ε-Fe3N/Fe2N was observed on the surface. ...

An innovative digital halftoning procedure is established on multiscale error diffusion is studied in this paper. In this research a negative multiscale error diffusion technique is proposed having more practical significance. The prominent features of the algorithm are (1) Application of image quadtree (2) Selection of the darkest pixel based on minimum intensity guidance theorem (5) Non causal diffusion of error. The quality of the halftoned image is evaluated both through subjective and ...

A bed is a piece of furniture used as a place to sleep or relax. Students generally need a wide range of accessories to meet their daily requirements like beds for sleeping, tables for studying, shelves for keeping things etc. which demands a lot of space. So, here a multipurpose bed is designed targeting especially on college students living in hostels. Different customer needs have been identified, existing models have been studied and bed has been ergonomically designed. Concept of ergonom...

A multiphase CFD model has been developed to investigate the effect of impinging supersonic oxygen jet on hot-metal bath deformation during basic oxygen steel making process. This model also helps to study and predict the sloping behavior taken place during blowing period inside Linz-Donawitz (LD) converter. Detail knowledge of fluid flow behavior inside the LD converter is essential as steel making through LD converter is most dominant among all the primary steel making processes and the eff...

Taking “Utopias” and “Heterotopias” as representative sites that cannot save us from power, this paper ascertains that though “campy” in nature, in Susan Sontag’s description of the term, “Homotopic” sites are unnamed whereas the relationships are socially sanctioned; the categorization of the sites, having a physicality, remains stagnant, undiscussed yet they hold ample significance in their functionality. In short, this paper projects the principles of homotopias by providing a critical enq...

A strategy for designing methane hydrate inhibitor molecule has been established depending upon geometrical parameters, interaction energy, highest occupied molecular orbital (HOMO) - lowest unoccupied molecular orbital (LUMO) structures and energies, natural bond orbital (NBO) analysis, potential energy curve, Mullikan charge, IR intensity and red shift. One methane hydrate inhibitor molecule namely 2, 2’-oxydipropane-1, 3-diol has been designed based on the established design strategy. Theo...

Electrochemical machining is one the best alternative for producing complex shapes in advanced materials used in aircraft and aerospace industries. The process is influenced by different parameters including tool and work-material. In the present investigation the electrochemical machining has been carried out taking mild steel as work material and copper as tool material. The optimization of the process parameters has been carried out to satisfy the multi-objective response criteria such as ...

From the last few decades there has been an increasing demand of compact, integrated and small size products by micro-manufacturing technique. Micro-wire EDM is a versatile method for manufacturing a variety of micro-products. It is a complex process. In the present investigation, the modeling of microwire EDM has been carried out to determine MRR and validated with experimental results for aerospace material. The temperature distribution and residual stress have also been determined. The m...

System identification methods of structural dynamics, in general solve inverse vibration problems to identify properties of a structure from measured data. The use of computers and efficient mathematical algorithms allow identification of the process dynamics by evaluating the input and output signals of the system. The result of such process identification is usually a mathematical model by which the dynamic behaviour can be estimated or predicted. Models and parameters of practical applica...

Self-excited induction generator (SEIG) is preferred in isolated and remote power generating systems. But the major problem associated with SEIG is change in voltage and frequency during loading condition. For the development of simple voltage and frequency controller it is essential to detect the load transient in less time using less hardware. In this paper Second Generation Wavelet Transform (SGWT) and Discrete Wavelet Transform (DWT) are used for SEIG to detect load transient. It is obser...

In this paper a single phase grid connected photovoltaic (PV) system has been modeled and simulated using Matlab/Simulink. The PV generator is interfaced with the utility grid by a single phase voltage source inverter (VSI). A maximum power point tracking (MPPT) control algorithm is implemented to extract maximum power from the PV generator irrespective of operating conditions. The DC-DC boost converter placed in between PV generator and VSI performs MPPT and amplifies the output voltage fro...

For the first time, we have come up with a new idea of identifying the UV stellar point sources from the extra-galactic sources by choosing a suitable IR colour, J-W1 < 1.2 (W1 is a WISE band at 3.4 micron and J is a 2MASS band). We have used this method to identify the stars and then compared the observed star counts with Besancon model of stellar population synthesis. We have shown that our IR colour cut method is better than the SDSS morphological classification in providing a clean catalo...

Person re-identification is to match the appearance based images of an individual who has already been captured by different camera perspectives. This paper presents an appearance based model for person re-identification. It consists of the formation of prototypes followed by a matching strategy. The prototypes are discovered from the visual appearances among the individuals with similar characteristics. When a probe comes along, it necessitates to be classified through prototype assignment....

This paper presents an approach for re-identification based on appearance. The person re-identification is recently introduced and yet an unsolved problem in computer vision. Re-identification refers to identify an individual who has already been observed by different cameras. The appearance of an individual in different cameras looks unlike due to illumination variations and arbitrary pose alternations. The identity of an individual is represented by a distinct signature model that should i...

Agriculture holds a pivotal place in the economy of Orissa in terms of both income and employment around which economic privileges and deprivations revolve. For the people of Orissa agriculture is not merely a means of livelihood but a way of life. In this paper an attempt has been made to analyse the impact of new agro technology on the rural social institutions with reference to traditional rural family and power structure in Orissa.The study intend to explore the changing socio-political s...

Although several studies have suggested that constructive role of trade unions are crucial for successful change management, but the conceptual explanation and the factors that influence this relationship remains largely unexplored. To fill this gap, this study examines the mediating role of unions in the relationship between industrial relations(IR) and successful change (SC), using organizational-level data from a single site case study based on a survey of 516 employees from Rourkela Steel...

Partial Transmit Sequence (PTS) is one of the promising techniques, that provides good Peak-to-Average Power Ratio (PAPR) reduction for Orthogonal Frequency Division (OFDM) signal. The traditional PTS (T-PTS) has high complexity, as it involves extensive random search over all the combinations of allowed phase vectors. Moreover, the search complexity increases exponentially with the increase in number of phase vectors. In this paper, a suboptimal meta-heuristic algorithm for phase optimizatio...

Rapid prototyping (RP) is a promising technology that has been implemented in many spheres of industry, particularly in the area of new product development due to its unique characteristics of fabricating functional prototypes timely and efficiently. Recent years have seen various rapid prototyping (RP) processes such as stereolithography(SLA), selective laser sintering (SLS), fused deposition modelling(FDM), and laminated object manufacturing (LOM) which can fabricate three dimensional(3D) s...

Axial wall conduction plays a crucial role in the thermal performance of micro device. In this background a numerical investigation is carried out to understand the effect of axial wall conduction in a microtube at low temperature. Helium at 100 K enters a microtube of inner diameter of 0.4 mm and length of 60 mm and subjected to constant wall heat flux while the microtube cross-sectional faces are considered insulated. Temperature varying thermophysical property of helium is considered in th...