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Search Results: 1 - 10 of 873 matches for " Ardhendu Sekhar Patra "
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A Novel Radio over Fiber System for Long Haul Single-Mode-Fiber Transmission
Ardhendu Sekhar Patra,Anindya Sundar Das,Banibrata Bag,Akinchan Das
International Journal of Soft Computing & Engineering , 2013,
Abstract: We have proposed and demonstrated a novel architecture of a radio over fiber (RoF) system in this paper. In this downlink system, the base band data signals are carried by the optical millimeter-wave generated at the central station and converted to the electrical RF signal by a converter at the base station before we distribute them through antenna. Here we generate and transmit the optical millimeter-wave by using external modulation technique and carrier suppression method. The performance is investigated by the good eye diagram and the significantly low BER at different lengths of the single mode fiber (SMF).
Multiple polarized beam interferometers for array generation with improved efficiency
Ardhendu S. Patra,Alika Khare
Optica Applicata , 2008,
Abstract: A highly efficient multiple polarized beam interferometer for the generation of hexagonal array is reported. An expression for the intensity distribution is worked out using Jones’ calculus and computed pattern is compared with the experimental results. The array pattern could be scanned over large longitudinal distances without loss of distortion. Fringe visibility of interferograms has been studied as a function of relative state of polarization of the interfering beams. Some of the potential applications of such arrays are also proposed.
Strain Rate Effects on Tensile Properties of HDPE-PP Composite Prepared by Extrusion and Injection Moulding Method  [PDF]
Harekrushna Sutar, Himanshu Sekhar Maharana, Chiranjit Dutta, Rabiranjan Murmu, Sangram Patra
Materials Sciences and Applications (MSA) , 2019, DOI: 10.4236/msa.2019.103017
Abstract: The present paper investigates the effect of strain rate on different tensile properties of high density polyethylene (HDPE) and polypropylene (PP) composite. Tensile specimens of virgin HDPE-PP composites are prepared via twin screw extruder and injection moulding methods as per ASTM D638-02a (Type-I); with gage length 50 mm, width 13 mm and thickness 3 mm. Composites are fabricated with PP as reinforcing agent at a loading rate of 10%, 20%, 30%, 40% and 50% by weight. Experiments are carried out at room temperature of 23°C and absolute humidity of 54% at a cross head speed of 30, 40, 50, 60 and 70 mm/min. Stress and strain values at yield and break points are reported. Atomic force microscopy (AFM) is used to study the distribution of polymer molecules in the mixture and surface roughness. As in last, experiments are designed by Taguchi optimization method to find out the dominating factors on tensile strength.
SRS BUILDER 1.0: An Upper Type CASE Tool For Requirement Specification
Ardhendu Mandal
Computer Science , 2011,
Abstract: Software (SW) development is a labor intensive activity. Modern software projects generally have to deal with producing and managing large and complex software products. Developing such software has become an extremely challenging job not only because of inherent complexity, but also mainly for economic constraints unlike time, quality, maintainability concerns. Hence, developing modern software within the budget still remains as one of the main software crisis. The most significant way to reduce the software development cost is to use the Computer-Aided Software Engineering (CASE) tools over the entire Software Development Life Cycle (SDLC) process as substitute to expensive human labor cost. We think that automation of software development methods is a valuable support for the software engineers in coping with this complexity and for improving quality too. This paper demonstrates the newly developed CASE tools name "SRS Builder 1.0" for software requirement specification developed at our university laboratory, University of North Bengal, India. This paper discusses our new developed product with its functionalities and usages. We believe the tool has the potential to play an important role in the software development process.
BRIDGE: A Model for Modern Software Development Process to Cater the Present Software Crisis
Ardhendu Mandal
Computer Science , 2011,
Abstract: As hardware components are becoming cheaper and powerful day by day, the expected services from modern software are increasing like any thing. Developing such software has become extremely challenging. Not only the complexity, but also the developing of such software within the time constraints and budget has become the real challenge. Quality concern and maintainability are added flavour to the challenge. On stream, the requirements of the clients are changing so frequently that it has become extremely tough to manage these changes. More often, the clients are unhappy with the end product. Large, complex software projects are notoriously late to market, often exhibit quality problems, and don't always deliver on promised functionality. None of the existing models are helpful to cater the modern software crisis. Hence, a better modern software development process model to handle with the present software crisis is badly needed. This paper suggests a new software development process model, BRIDGE, to tackle present software crisis.
Capacity of Sum-networks for Different Message Alphabets
Ardhendu Tripathy,Aditya Ramamoorthy
Mathematics , 2015,
Abstract: A sum-network is a directed acyclic network in which all terminal nodes demand the `sum' of the independent information observed at the source nodes. Many characteristics of the well-studied multiple-unicast network communication problem also hold for sum-networks due to a known reduction between instances of these two problems. Our main result is that unlike a multiple unicast network, the coding capacity of a sum-network is dependent on the message alphabet. We demonstrate this using a construction procedure and show that the choice of a message alphabet can reduce the coding capacity of a sum-network from $1$ to close to $0$.
An Empirical Study and Analysis of the Dynamic Load Balancing Techniques Used in Parallel Computing Systems
Ardhendu Mandal,Subhas Chandra Pal
Computer Science , 2011,
Abstract: A parallel computer system is a collection of processing elements that communicate and cooperate to solve large computational problems efficiently. To achieve this, at first the large computational problem is partitioned into several tasks with different work-loads and then are assigned to the different processing elements for computation. Distribution of the work load is known as Load Balancing. An appropriate distribution of work-loads across the various processing elements is very important as disproportional workloads can eliminate the performance benefit of parallelizing the job. Hence, load balancing on parallel systems is a critical and challenging activity. Load balancing algorithms can be broadly categorized as static or dynamic. Static load balancing algorithms distribute the tasks to processing elements at compile time, while dynamic algorithms bind tasks to processing elements at run time. This paper explains only the different dynamic load balancing techniques in brief used in parallel systems and concluding with the comparative performance analysis result of these algorithms.
Role of Temperature and Carbon Nanotube Reinforcement on Epoxy based Nanocomposites  [PDF]
Subhranshu Sekhar Samal
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2009, DOI: 10.4236/jmmce.2009.81003
Abstract: This paper presents the synthesis of epoxy based Multiwalled Carbon nanotubes (MWCNTs) reinforced composites by method of sonication. The variation in the nature of reinforcement (Aligned & Randomly oriented MWNTS) has resulted in the improvement of mechanical properties like flexural modulus, tensile strength and hardness. A small change in chemical treatment of the nanotubes has a great effect in the mechanical and morphological properties of nanocomposites due to effective load transfer mechanism and state of dispersion. The change in properties has been verified by optical microscopy and Scanning electron microscopy. Apart from that the prepared composites has been treated under different temperatures (like hot water, room temperature and liquid nitrogen temperature) and the change in mechanical as well as morphological nature has been verified by SEM of Fractographic surface this proved the elasticity and ductility of the composites.
Characterizations of GEM detector prototype
Rajendra Nath Patra,Amit Nanda,Sharmili Rudra,P. Bhattacharya,Sumanya Sekhar Sahoo,S. Biswas,B. Mohanty,T. K. Nayak,P. K. Sahu,S. Sahu
Physics , 2015,
Abstract: At NISER-IoP detector laboratory an initiative is taken to build and test Gas Electron Multiplier (GEM) detectors for ALICE experiment. The optimisation of the gas flow rate and the long-term stability test of the GEM detector are performed. The method and test results are presented.
Avian Diversity in and around Digha, District—East Midnapore (West Bengal, India)  [PDF]
Goutam Patra, Santanu Chakrabarti
Advances in Bioscience and Biotechnology (ABB) , 2014, DOI: 10.4236/abb.2014.57070
Abstract:

The digha is located at the border of West Bengal and Orissa state. It has both fresh and saline waterbodies rich in aquatic vegetation and several kinds of birds in the harbours in all the seasons. Grassland areas, rice fields, herbs, shrubs and trees located in and around the water bodies provide food and shelter for these birds. Total number of 86 bird species belonging to 10 orders and 35 families were recorded during the 2-year long study period. Passeriformes is the dominant order of birds. But the future of this avian fauna is in danger due to unchecked growth of tourism related hotel industry and urbanisation of the city.

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