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Volume 4 Issue 6 (June 2017)

S.No. Title & Authors Page No View
1

Title : Co-processing of Scrap Tires and Waste from the Re-refining of Used Lube Oil in Cement Kilns

Authors : Rogerio Jose da Silva, Renata Vitor Chaves S. G. Francisco, Alexandre Oliveira Lopes

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The cement industry has a high consumption of thermal energy through the burning of fuels. The use of wastes as alternative fuels allows, through co-processing, its destruction and the use of its calorific value in the production process. Scrap tires and the wastes generated in re-refining of used motor oil has been used in co-processing in cement kilns due the increase of automotive vehicles. Co-processing has multiple variations according to its location, the productive process and its facility. This way, it is possible to reach high thermal destruction efficiency and low emission of pollutants. This paper analysis the environmental and production restrictions that determine the use limits of waste in the kiln, when the main fuels are petroleum coke or coal and the waste co-processing occurs in rotary kiln with preheaters stages, precalciner with tertiary air and grate coolers. 

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Title : Stabilization of Soil Using Sugarcane Straw Ash and Polypropylene Fibres

Authors : T. Suresh Reddy, Dr. D S V Prasad

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Soils pose problems to civil engineers in general and to geotechnical engineers in particular. They cause damage to structure founded in them because of their potential to react to changes in moisture regime. Soil stabilization is the process of altering some soil properties by different methods, mechanical or chemical in order to produce an improvement soil material which has all the desired engineering properties. In this paper, sugarcane straw ash and polypropylene fibres were used at varying percentages are blending to stabilize the soil. Various geotechnical laboratory tests like compaction, Unconfined Compression Test and California Bearing Test were carried by varying the percentage of sugarcane straw ash (10% ,15%,20% and 25%) and polypropylene fibres (0.5%, 1.0% and 1.5%) respectively. It is found that 20 % increase in the percentage of sugarcane straw ash and 1% polypropylene fibres increases the UCS and CBR values.

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Title : Effect of Shot Size and Peening Pressure on the Low Stress Abrasive Wear Behavior of Annealed Medium Carbon Steel

Authors : S.L. Ahirwar, D.P. Mondal, Mukesh Pandey, Shyam Birla

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The effect of shot size and peening pressure on abrasive wear of annealed medium carbon steel has been studied. The peening pressure was varied between 3-5 bar and shot size in the range  of 0.6-1.00 mm at fixed peening intensity of 0.27A.The low stress abrasive wear tests were conducted using dry abrasion test rig TR-38 at an applied load of 50 N. It was noted in general, that the wear rate decreases with increase in sliding distance. It is interestingly noted that the minimum wear rate is observed at 0.8 mm shot size and 4 bar peening pressure. Further, decrease or increase in peening pressure or shot size leads to higher wear rate. This has been understood from the surface and the subsurface microstructures, work hardening and residual stress distribution after shot peening. The wear rate further correlated empirically with peening parameters. 

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Title : Identifying Critical Success Factors of Building Green Logistics Business in China

Authors : Sung-Chi Wu, Shih-Ming Ou

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Since environmental pollution makes the problem of limited human living space become more severe, any logistics companies, an important source of pollution, need to deal with this issue. This paper intends to explore the critical success factors for building smart green logistics business in China. We first investigate and collect the factors impacting on the operations of smart green logistics business. In order to acquire the assessments from the experts to investigate the influence between each two factors, we invite the managers who serve in the top five logistics companies in Fujian and conduct the expected questionnaire investigation. By using Decision Making Trial and Evaluation Laboratory (DEMATEL) method, we explore the causal effect among factors. Our results show that the government investments and green power development are the two most influential factors among all.

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Title : The geographical latitude index of the relevance of research results activity as scientometric index

Authors : Popova Olga, Romanov Dmitriy, Drozdov Alexander, Mironova Marina

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The purpose of the research is to suggest and the describe a new standard for productivity of the research activity. The Hirsh index based on scree method has become popular inperforming scientists` work productivity. This index is also applied to scientific groups (organisations). However, h-index and other scientometric indexes based on citations can be artificially increased with the help of scam models. Thus, there is a necessity to develop a new standard of assessment of a research activity efficiency that will be difficult (hard) to “improve”. The authors suggest geographic latitude index of the relevance of citations. Despite the fact that suggested index as h-index based on citations, its big importance indicates that scientific union accepts the results of academic staff activity. Moreover, the given index could be a standard for identifying prospective (productive) scientific workers. To achieve the objectives and tasks the following correlated methods  have been used: the analysis of problem citation, the analysis of scientific references and best practice of research activity management in scientific institutions, universities (benchmarking), cognitive, structure-functional and mathematic modeling, the method of graph theory, sets and relations; automated systematic cognitive  analysis; method of qualimetry (theory of latent variables); method of mathematic statistics, method of analytic geometry. The research was carried out on the basis of high schools of Krasnodar Region. It was also used methodological base of the research: system approach, metasystem approach, probabilistic statistical method, sociological and qualimetric approaches.

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6

Title : Characterization of Natural Fiber Reinforced Composites

Authors : P. Hema Aditya, K. Siva Kishore, D.V.V. Krishna Prasad

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With advancements in the methods of research, the branch of Material science has seen its extremes but there are some areas upon which much attention should be focussed. One such area is the natural composites. Taking the ecological problems created by synthetic material into account, there is a need to search for the alternatives for which the nature gives answer which furnishes us with a wide variety of plant material with extraordinary properties leaving us to explore its engineering applications. This work focuses on the extraction of fibers from pineapple leaf, sisal plant, and date palm leaf. Hand layup technique is being used to prepare the samples of composites. ASTM standards are being followed while fabricating the natural fiber reinforced composite. The properties such as tensile strength, flexural strength and impact strength and hardness are to be studied. The corresponding strengths are to be compared to select the best alternative.

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Title : 3-Quinonlinecarbaldehyde thiosemicarbazones: Synthesis from N-arylacetamide, Characterization, Antibacterial and Antioxidant activities

Authors : Sreenivasulu Enumula, Satish Mudam, Khursheed Ahmed

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Four different Schiff bases of 3-quinolinecarbaldehydes are synthesized from differently substituted thiosemicarbazides. The structures of compounds are established using modern analytical technique FT-IR, 1H-NMR and mass spectral data. Antimicrobial screening results are also presented against clinical isolates of pathogenic strains of Staphylococcus aureus, and E. coli. Simultaneously, antioxidant activities also have been carried out using DPPH radical scavenging properties to understand other functional applications of compounds. Depending on the structures of four synthesized compound, the compound d showed higher free radical neutralizing abilities as well as antimicrobial activities that may be due to the presence of 6-flouro group of the quinoline which might be facilitating the flow of electrons through polarization of electron density of the quinoline ring.

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Title : Diagnosis of solid waste management in the petrochemical-plastic sector of Cartagena de indias, Northern Colombia

Authors : Elias Alberto Bedoya Marrugo, Carlos Alberto Severiche Sierra, Dario David Sierra Calderon, Maria de Jesus Meza Aleman

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In the production of most petrochemical products there is a generation of associated solid waste. The objective is to diagnose solid waste management in a company in the petrochemical-plastic sector. The methodology initially consisted in the identification of the different operational areas and type of waste under the NTC GTC 24, in the second instance the solid waste classification was carried out taking into account the simple method of analysis of CEPIS and finally the quantification of The waste taking as a reference what Ruiz (2012)[1] did. It is evident that there is an increase (10.2%) in the generation of solid waste generated, from 545,750 kg in 2013 to 601,492 kg in 2014. The activities with the largest generation of solid waste (cardboard, plastic, wood) Are those of the reception and storage processes and the packaging process in each of the plants.

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9

Title : Scaling and Corrosion in Oil Production-How Do They Relate to Each other?

Authors : Amin Rezaee, Ali Mobaraki Nejad, Hamidreza Mansouri

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Formation of mineral scales and metallic corrosion are main concerns in flow assurance of oil production wells. Carbonates, sulfates, oxides and hydroxides are compounds observed in oilfield condition. Formation of such solid compounds, due to characteristics of the brine and/or corrosion processes, reduce the effective internal diameter of the production tubing in the well’s column. Presence of acid gases such as CO2 and H2S in aqueous environment of oil wells triggers chemical and electrochemical reactions involved in metallic corrosion.  At the first glance, scaling and corrosion are separate issues, but in fact, they can influence each other.  Corrosion products such as iron carbonate, any forms of iron sulfides and/or iron oxides are directly affected by the magnitude of corrosion rate. On the other hand, formation of scales on the surface of tubulars either decrease or increase the corrosion rate depends on the physiochemical characteristics of the surface layers. This paper briefly reviews such interaction between main mineral scales and corrosion processes in oil well condition based on the available literature data.

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Title : On The System Of Double Equations

Authors : S.Devibala, S.Vidhyalakshmi, G.Dhanalakshmi

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This  paper  concerns  with the  problem of obtain infinitely many non-zero distinct integers N1, N2 such that N1-N2 = 4k + 2(k>0)and  N1N2 = (2k+1)a2 where 2k+1 is square-free. A few  examples  are  given.  Some observations among N1, N2 are presented.

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Title : An Approach to Locate Site of Renewable Energy Source (RES) and Application of Big Bang Optimization to Size the RES

Authors : C.V.Gopala krishna Rao, Dr.G.Ravindranath, C.V.S.Anirudh

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In recent days the Renewable energy sources (RES) are being integrated into power transmission network which has many advantages which include reduction in cost of electrical generation, reduction in line losses and operating load bus at specified voltage. But inappropriate siting of RES causes severe penalty to advantages gained. The non-availability of electric power from conventional sources leads to excess slack power generation. This leads to violation of slack bus limits resulting in increased losses and poor bus voltages. Newton Raphson Load Flow(NRLF) is used to obtain voltage magnitude of transmission system. From this voltage profile by NRLF the siting of RES is decided. After deciding the site for RES the next issue is to size the RES so that system will not violate slack power limit. To satisfy slack power limit an optimization function with loss minimization, real power and reactive power balance as constraints is defined. This optimization function is solved using Big Bang-Big Crunch optimization. The RES variables obtained by minimization of objective function are also verified using RES indices namely total voltage deviation and real loss reduction index. These indices advocate real loss reduction index to be less than unity and total voltage deviation to be greater than unity. The approach proposed in this work confirm proper site and size of RES. This is confirmed upon application of proposed approach to WSCC-9 bus system.

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Title : A Sensor Interface For Human Health Monitoring In IOT

Authors : Miss M.R.Desai, Miss Neha Kulkarni, Miss Ranjita Timmapur, Miss Krushnashri Sasalatti, Miss Nilamma Byakod

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Wireless Sensor(WSN)has been employed to collect data about physical phenomenon in various application such as health monitoring and industrial monitoring. Internet of Things(IoT) has attracted a lot of attention and is expected to bring benefits to numerous application areas including industrial WSN systems and health care systems. Internet of things(IOT) refers to the interconnection of uniquely identifiable embedded computing like services within the existing internet infrastructure. Each sensor connected to the device is required to write complicated and cumbersome data collection code. To solve these problems an method is proposed to design a reconfigurable smart sensor interface for industrial WSN in IoT environment. Thus, it can read data in parallel and in real time with high speed on multiple different sensor data. The performance of the proposed system is verified and good effects are achieved in practical application of IoT. By detecting the values of sensors it can easily find out the Temperature, Gas present in the industrial environment. So that critical situation can be avoided and preventive measures are successfully implemented.

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13

Title : Impact Of Marketing Strategies And Performance Of Banks And Its Ffects On Nigeria Economy

Authors : Ishola J.A, Adedoyin I.S., Adeoye O. A, Dangana K. A

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The banking industry has been facing a lot of challenges in recent times in Nigeria. These include competition among them and non banking financial institutions such as insurance Companies. Therefore this research, impact of marketing strategies and performance of banks and its effects on Nigeria economy is aimed to  identify the various types of the marketing mix components employed by the  banks . to examine the effect of the marketing strategies on the performance of the banks. And  to determine if the marketing strategies employed by the Banks differ significantly from one another. Questionnaire was administered on two population which are  Management and  staff of the  banks and customers of the  banks. 250 questionnaire was administered to  Management and  staff of the  banks,  and also 250 was administered to customers of the bank in Nigeria. Result of the analysis revealed four factors which were distribution network, quality of service, promotion and price with the percentage contribution of each factor being 51.9%, 73.6%, 31.2% and 38.5% respectively. Multiple regression analysis shows that R2 = 0.563 which indicated that the four factor accounted for 56% variability in the performance of  marketing strategies employed by the banks. The result of the analysis of variance indicated that the mean ratings for the  banks were not significantly different at 0.05level. We thereby conclude that banks should focus its innovative efforts on enlarging the size of the market in which it participates by introducing new products and services, promoting new uses for existing products and seeking out new class of customers.

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Title : The Case Study of Availability of Livestock in Traditional Trade Fairs of Kumaun Region of Uttarakhand and their gradual Changes in their use todays Context

Authors : Bhagwant kumar Pandey

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This paper analyses the theoretical role played by the trade fairs organized in different parts of Kumuan region of Uttarakhand. It is well known that festivalsand fairs have always been part and parcel of human culture since time immemorial. These areoftencelebrated at certain/ particular places on specific dates, wherein confluence of culture, trade and entertainment take place.In the Himalayan region trade has always been a challenge due to uneven terrains, dense forests, inaccessible and distant places. Furthermore diversity of flora and fauna, scarcity of ground water indeed make it difficult and in viable. Even though in the past the trade of articles to distant places had been in existence and this fact is consolidated by the presence of manuscripts/ Pandu scripts& commercial ledgers found in these regions. The researcher has vastly surveyed the region to make the case study resourceful to other persons.

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Title : The Minimum Inhibitory Concentrations exerted by the N-salicylidene-2-substituted aniline against various strains of phytopathogenic

Authors : Mohamed Yazid Belghit, Zohir Nedjar, Abdelhamid Moussi, Djamel Barkat

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Fusarium genus includes several plant pathogenic fungi that may attack a large number of plants, causing diseases called fusarioses. In our strategy of the fight against this kind of fungus in vitro, we tested the acidity and the basicity of the culture medium (PDA) on mycelial growth of this genus of fungus, followed by the determination of the minimal inhibitory concentration of synthetic compounds (Schiff bases) such as N-salicylidene-2-methoxyaniline and N-salicylidene-2-nitroaniline against three species plant pathogenic: Fusarium culmorum, Fusarium graminearum and Fusarium verticillioides, using the agar dilution method at different concentrations of these two Schiff base derivatives and Tachigaren 30% SL as a standard fungicide. We found that the low acidity of the culture medium revealed better mycelial growth. The results show that the inhibition of mycelial growth seems to be proportional to the concentration of these compounds, however a better activity was revealed for the compound N-salicylidene-2-methoxyaniline with Minimum Inhibitory Concentration (MIC) =10 mg / ml against of the F. culmorum and F. graminearum strains. The two compounds tested showed a diversity of activity for all the fungal strains. This may be due to the presence of the various substituted groups (methoxy and nitro) on the structure of these compounds.

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Title : Bioremediation of heavy metal in crude oil contaminated soil using isolated Indigenous microorganism cultured with E coli DE3 BL21

Authors : Oluwamodupe Emmanuel Giwa, Francisca Omolara Ibitoye

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Soil contamination from crude oil have often been observed in recent years to increase the heavy metals and some hydrocarbon level in the environment from the soil to the plant and animals from the soil and hence the risk of bioaccumulation of this toxic compounds in the ecosystems which may threaten the human health in the endemic society. Bioremediation potency of individual indigenous bacteria isolated from soil polluted with crude oil was evaluated. Conventional method of identification was used to isolate and identify the indigenous microbes and the following were identified; Bacillus spp, Staphylococcus aureus, Micrococcus sp and Pseudomonas aeruginosa. The microbial accounts of total viable count after bio-augmentation 4.3×108, 2.7×108, 2×107 and 1.6×107 CFU g−1 for Pseudomonas aeruginosa, Bacillus spp, Micrococcus sp and Staphylococcus aureus respectively. Each microbe was bio-amplified in an improvised bioreactor containing nutrient broth and re-inoculated into a 20 gram of sterilized polluted soil with crude oil to ensure mono-bioremediation. The heavy metal analyses were carried out using AS machine in the space of 60 days. There was a significant different at a probability level 0.05 in the degree of bioremediation in all the treatment using t-test, comparing the Bio-Augmented Mechanic Site Sample + PET system and Bio-Augmented Mechanic Site Sample. PET System E. coli DE3 BL21 aided in a synergistic relationship with each selected bacteria to achieve remediation of the polluted soil which may be associated with natural gene sharing and protein amplification by the PET system. Moreover, the gene in each isolated indigenous bacteria encoding bioremediation should be excised and cultured with PET system (E. coli DE3 BL21). The proteins harvested may be used directly to study its bioremediation potentials.

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Title : Electrochemical Investigation of the Influence of an Amine-Based Corrosion Inhibitor on Corrosion -Erosion of Gas Pipelines

Authors : Mohammad Rasti, Ali Mobaraki Nejad

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Gas pipelines are exposed to erosion-corrosion phenomena in production fields. The synergetic effect of fluid parameters (such as velocity, turbulence, fluid regime, etc.) and the characteristics of the corrosion scales formed on the pipe wall can accelerate erosion-corrosion inside oil and gas pipelines. Most of times, injection of corrosion inhibitors (CI) is the only available option to prevent internal corrosion of pipelines. In this study, the influence of an amine-based CI on erosion-corrosion rates, in flowing fluid condition, is electrochemically investigated. The test electrolyte is synthesized to simulate condition of a multiphase gas pipeline. The corrosion rate is measured by Electrochemical Impedance Spectroscopy (EIS) in presence of different concentration of corrosion inhibitor (0, 5, 50, 100 ppm). The dynamic properties of the flowing fluid inside gas pipelines is simulated by means of a cylindrical working electrode with 1200 (rpm) rotational speed. The results showed that in the lack of good adhesion of the corrosion inhibitor films, they could be readily detached form the steel surface by the erosional characteristics of the flowing fluid, exposing the bare metal to corrosive media. This dramatically reduces the life span of the pipeline and causes immature erosion-corrosion failures. The adhesion force of the corrosion inhibitor films are directly related to the thickness of the formed film on the pipe surface and the shear stress generated by flow at the steel surface.

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Title : Analysis of Optimal Connected Designs Using Minimal Replicates

Authors : Adijat Bukola Aiyelabegan, Reuben Adeyemi Ipinyomi

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Minimizing type I and type II errors with appropriate sample sizes in order to have convincing conclusions often pose a great challenge to experimenter. REML and ML criteria are popular for estimating variance-covariance matrix. Which one to use might pose another challenge to an experimenter.  Huge error has effect on experiment. How to get the best information on Incomplete Block Design experiment is the focus of this paper.

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Title : Votetrust: Strenthening the online social network

Authors : Miss. SushmaTorvi, Miss Pallavi koli

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Online social networks (OSNs) are popular collaboration and communication tools for millions of users and their friends. Unfortunately, in the wrong hands, they are also effective tools for executing spam campaigns and spreading malware. Intuitively, a user is more likely to respond to a message from a Facebook friend than from a stranger, thus making social spam a more effective distribution mechanism than traditional email. In fact, existing evidence shows malicious entities are already attempting to compromise OSN account credentials to support these “high-return” spam campaigns. Recently, there has been much excitement in the research community over using social networks to mitigate multiple identity, or Sybil, attacks. A number of schemes have been proposed, but they differ greatly in the algorithms they use and in the networks upon which they are evaluated. As a result, the research community lacks a clear.

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Title : On The Nature of Ring Patterns In Ice Crystals of Hailstones: A Signature of Global Warming

Authors : C. Siam, R. Bora Bordoloi, R. Mahanta, J. Saikia, R. Bordoloi, A. Sarmah, G.D. Baruah

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In the present work we report for the first time the ring patterns in the ice crystals procured from hailstones at Doom Dooma (27.40N, 95.30E) on March 17, 2016 and April 9, 2017. We have measured the intensity patterns of the rings with the help of a software (ImageJ). Since the ring patterns have been observed in the ice crystals of hailstones only in recent years, it is reasonable to believe that they will give valuable information on the process of ice nucleation and possibly on global warming.

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Title : Analysis Simulation of Interaction Information in Chaotic Systems of Fractional Order

Authors : Ismailov Bahram Israfil

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In article, in terms of Tsallis entropy, a model of generalized information losses for chaotic systems of fractional order in proposed. It is shown that the generalized model is the interaction of memory losses and process losses (transition from a state of relaxation to a gate of equilibrium) caused by the duration of the relaxation processes. Interaction demonstrates a variable mode of work.

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Title : Analyzing the effects of operational excellence in safety performance

Authors : Chen Zhang, Yuan Wan, Yong Zou

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In the present exceptionally competitive construction industry, there is a basic requirement for directors to consistently enhance their company's proficiency and adequacy. Even more particularly, directors need to know which execution measures are most basic in deciding their association's general achievement. Benchmarking, when done legitimately, can precisely distinguish both effective organizations and the hidden purposes behind their prosperity. Be that as it may, thorough benchmarking inside the construction business remains an embryonic field. This paper dissects and studies both the execution measures and measurements utilized generally in the construction business and the benchmarking models created to date for the business. In view of the aftereffects of this investigation, benchmarking models utilizing information envelope examination are recommended that offer noteworthy upgrades over current models. The proposed models measure construction firm execution on a vast premise, encourage exchange off examinations among different execution measurements, and tie the assets exhausted by construction firms to how well those organizations perform generally. The models additionally give supervisors direction in deciding how particular organization assets can be reallocated to enhance general organization execution.

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Title : The introduction of a simulated model using a sphygmomanometer blood pressure measurement and evaluation of error for the model to different cuffs

Authors : Gholam Reza Ataei, Maryam Chopani

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Measurement of blood pressure by using of a sphygmomanometer is the common practice in medical centers. So evaluation of how to measurement, accuracy and realization conditions to increase it is very important. In this research, the effects of different Cuff lengths used in sphygmomanometer were evaluated and its error has been compared with the reality of it. this study done on thirty patient by using of sphygmomanometer Piezoelectric Transducer Pulse ,flow meter and then in the laboratory model with providing sufficient conditions was close to reality, the effects of Cuff length in different diameter of arms and amount of error determined. Evaluation of results on sample show 129.722 mm Hg pressure is systolic pressure end of regular waves of sphygmomanometer happens in the pressure of 78.889 mmHg that is diastolic pressure. In this situation, Flow and pulse reach to its initial value. With Comparison of wood with different dimensions was seen that in the wood with 27 cm circumference, complete closure occurs and two stick figures with 23 and 35 cm circumference with low-noise have similar conditions and thus the rage of 23-35 cm can be considered as a reliable range and considered an average between systolic and diastolic pressure as a correct pressure and the condition of two woods with the 21.5 and 38cm circumference with high noise is the same. The results show that the gap from 14.5 to 23 cm circumference and 35 cm above, the measurement has an error, or is false entirely and in the gap 23-35cm can be have reliable measured. Despite the differences in wood and real arm, also the results obtained from the observations apply to the reality.

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Title : Primary Decomposition of Ideals Arising from Hankel Matrices

Authors : Katie Brodhead

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Hankel matrices have many applications in various fields ranging from engineering to computer science. Their internal structure gives them many special properties.  In this paper we focus on the structure of the set of polynomials generated by the minors of generalized Hankel matrices whose entries consist of indeterminates with coefficients from a field k. A generalized Hankel matrix M has in its jth codiagonal constant multiples of a single variable Xj. Consider now the ideal in the polynomial ring k[X1, ... , Xm+n-1] generated by all (r Í r)-minors of M.  An important structural feature of the ideal is its primary decomposition into an intersection of primary ideals.  This decomposition is analogous to the decomposition of a positive integer into a product of prime powers.  Just like factorization of integers into primes, the primary decomposition of an ideal is very difficult to compute in general. Recent studies have described the structure of the primary decomposition of.  However, the case when r > 2 is substantially more complicated. We will present an analysis of the primary decomposition of  for generalized Hankel matrices up to size 5 Í 5.

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Title : Robust Least Squares Dummy Variable Estimation Of Dynamic Panel Models In The Presence Of Outliers

Authors : Okeke Joseph Uchenna, Okeke Evelyn Nkiruka, Obi Jude Chukwura

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This research is focused on the consistent, robust least squares dummy variable (LSDVR) estimator which is predicated on the correction of the bias of the inconsistency of the least squares dummy variable estimator of the parameters of the dynamic panel data model, as an extension of earlier results. We compared the results of the bias corrected least squares dummy variable estimator of the dynamic panel data models in the presence of outliers, at stated specifications of the model with the consistent instrumental variable (IV) and the generalized method of moments (GMM) estimators of Anderson and Hsiao (AH), Arellano and Bond (AB) and Blundell and Bond (BB) to validate the claims or otherwise of the estimators. We observe at  and B=0.2 that the robust least squares dummy variable estimator (LSDVR) performs better than the IV- GMM in finite and large samples in terms of predictive powers and in the estimation of the autoregressive coefficient in large samples followed by the LSDV, though, with maximum RMSE property while the Blundell and Bond (BB) performs better than the other contending models in estimation of the autoregressive coefficient in finite samples showing that the presence of an outlier does not affect the predictive power of the robust least squares dummy variable (LSDVR) estimator.

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Title : Information model portal of scientific knowledge

Authors : Jamalova Jala

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Information model portal of scientific knowledge which should provide substantial access to scientific information resources is proposed. Information model combines the models of domain and problem fields of the portal, as well as describes the types of the presented information. On the base of this model, the internal portal data storage is constructed, its information content, navigation and search are organized.

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Title : Computational Investigation of Effect of Turbulator Arrangements on Turbine Blade Cooling

Authors : C. Sriram, S. Suthagar, M.R. Swaminathan

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Turbine inlet temperature is limited by metallurgical considerations and many modern engines make use of air cooled blades to permit operation at elevated temperatures and then it can be assumed that the mass flow remains constant throughout as explained earlier. At higher temperatures it is necessary to extract air from the compressor to cool both stator and rotor blades called as bleed flow of cooling air. The rotor blade cooling is the most difficult problem. It should not be forgotten that, with high gas temperatures, oxidation becomes as significant a limiting factor as creep, and it is therefore equally important to cool unstressed components such as nozzle blades and annulus walls. The objective of the analysis is to study the effect of reduction of temperature and to attain the maximum cooling efficiency on gas turbine blade cooling by varying the geometry of the cooling passages. An attempt is made in this paper to compare the performance of various shapes of blades by using computational fluid dynamics. It was found that blade cooling passage with angled turbulators is more effective in heat transfer while comparing with all other configurations of with and without turbulators. 

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