Volume 6 ~ Issue 6

Abstract:-In thisstudy, in a square- rootdomain, electronicallyadjustablecurrent-mode, secondordermultifunctionfilter circuit isdesigned. High-pass, band-reject and band-pass output currentscanbeobtained as the output current of the multifunctionfilter circuit. In addition, the f0cut-off frequency and Q quality factor of the filter circuit canbeadjustedelectronically by changing the values of the current I0 dc in the circuit. PSPICE computer simulations wereperformed to verify the theoreticalresultobtained

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Author Keywords:- Compandingsystems, current-mode circuits, square-root-domainfilters

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 07

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© Copyright 2014, All rights reserved.

In modern manufacturing contexts, process monitoring is an important tool aimed at ensuring quality standard fulfilment whilst maximising throughput. In this work, a monitoring system comprised of an infrared (IR) camera was employed for tool state identification and surface roughness assessment with the objective of reducing environmental impacts of a milling process. Two data processing techniques, based on statistical parameters and polynomial fitting, were applied to the temperature signal acquired from the IR camera during milling operations in order to extract significant features. These features were inputted to two different neural network based procedures: pattern recognition and fitting, for decision making support on tool condition and surface roughness evaluation respectively. These capabilities are discussed in terms of reducing waste products and energy consumption whilst further improvingproductivity

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Author Keywords:- infrared monitoring, eco-intelligent manufacturing, milling, neural networks, artificial intelligence

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 14

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© Copyright 2014, All rights reserved.

Experimentation is used differently in science, engineering, and science education. The aim of many science fairs is to encourage young talent in scientific inquiry. Based on 57 interviews with participants of a German youth science fair, this article points out typical students' conceptions about the procedure and the purpose of experimentation. The analysis of the interview data revealed that the derived concepts firstly depend on each other and secondly reflect the differences in the way of thinking and working between scientists and engineers. Since experiences with experimentation provide the basis for learning and thus for the conceptual knowledge about science, we conclude that it is essential, for science education, to distinguish the engineer's and the scientist's point of view and to implement more authentic inquiry in science lessons at school.

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Author Keywords:- conceptual change, experiments, inquiry-based learning, science education

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 06

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© Copyright 2014, All rights reserved.

This paper evaluates the efficiency of energy dissipation of the spillway for the Mekin Dam with respect to its capacity by verifying that the flow down the spillway does not result in "transitional flow‟ which can induce vibrations dangerous to the structure. It also verifies the stability of the spillway by calculating the resulting safety coefficients at different times.

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Author Keywords:- Mekin, spillway, Step flow, nappe flow, skim flow, energy dissipation, stability and stress

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 07

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© Copyright 2014, All rights reserved.

Gadolinium aluminate (GAO) was prepared by reverse chemical precipitation out of reagent grade chemical salt precursors i.e. gadolinium oxide and aluminum sulphate derived pseudoboehmite. The obtained gel like precipitates were dried, and calcined at various temperatures. Powders were uniaxially pressed into compacts and sintered in air up to 1600°C. Calcined and sintered compacts were characterized by XRD, FESEM, HRTEM, Raman spectroscopy, Arquimedes density measurements, Vickers indentation micro hardness, and fracture toughness (KIC) from crack indented specimens. Compacts were sintered up to 98.3±3.3 % high density values. Gadolinium aluminate perovskite GdAlO3 phase (GAP) was mainly found throughout all the processing and sintering cycle, however a monoclinic low strength gadolinium aluminate, Gd4Al2O9 (GAM) impurity phase was steadily found to be present despite tight stequiometric and processing control. Such impurity phase was found to lower the fracture toughness down to 0.12±0.01 MPa.m1/2.

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Author Keywords:Reverse, chemical, precipitation, gadolinium aluminates.

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 07

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© Copyright 2014, All rights reserved.

Delays are one of the most common problem faced by the construction industry in India and around the world. Construction delays can be caused by several reasons which can be related to owner, design, labour or could be caused by some external factors such as bad weather. The delay in construction causes time overrun which implies that the project requires additional time for completion than originally anticipated. Time overrun in turn leads to cost overrun which causes huge monetary losses. This study focuses on finding out the most common causes of construction delays in Indian context. The study was carried out in South and Central Mumbai region. A questionnaire based survey was conducted based on 43 questions spread across 9 different categories. The findings were evaluated with Relative Importance Index technique. The aim of the study was to identify various causes of delays in construction and their importance.

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Author Keywords:- Time Overrun, Cost Overrun, Relative Importance Index, Construction Delays, Construction Industry.

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 6

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© Copyright 2014, All rights reserved.

In recent years, wide studies are carried out in usage of isolators in structures and equipment, for the reduction of vibrations transmitted due to earthquakes, machine vibrations and any other minor disturbances. But providing protection against vibrations caused due to blasts still remains challenging due to its high amplitude and very short duration. In this paper, an effort has been put for providing shock isolation for protective structure against dynamic load caused due to Blast, using mechanical springs devoid of damping. Here an analytical study is made to understand the reduction of 10g acceleration to tolerable limit of 0.5g acceleration. Simulations are carried out using ANSYS software to understand the behavior of the spring under varying static and dynamic loads. Transmissibility of the shock from base to top of the spring is also studied using software and results are found to be comparable with the theoretical approach. The results evident that desired transmissibility can be achieved using mechanical springs

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Author Keywords:- Ground shock, mechanical springs, shock isolation, transmissibility

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 10

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© Copyright 2014, All rights reserved.

Long-term goalsto be achievedfromthis studyisthat thespatial developmentof urbansettlementsin DenpasarBali provincecanapply the concept ofdistinctive/uniquelocal wisdombornfromthe local community. Furthermore,it is expected toincrease the attractiveness ofurbansettlementsinBaliwhichhas beenrecognizedas onetourist destinationin Indonesia. Paradigm usedin this studyisphenomenologywithnaturalisticandinterdisciplinaryapproach. Dataindigenous communitiesareexpressed throughpeople's behaviorthroughout Tukad Badungfromupstream todownstream: civitas, activities, facilitiesorequipment used, and thespace usedis collectedthroughdirectobservationinthe field, taking pictureswith photosandcamcorders, measurements, interviewsand sound recordings. The gardenserves asa playground, planting cropshousehold, wherefarming, honingskills, garbagedisposal, andsite preparation/supportceremony. Gangserves as amajor trafficfor humansandspirits. ThengrowingurbansettlementsalongTukadBadungin Denpasarwithspatialconceptsconsisting ofriver(Tukad), border(ambal-ambal/jerogjogan), yards, alleys(Rurung), roads(clan). Urbanhomestead/boardingusingthe concept ofspatialsettlementBaliplainsin generalwithNatahpatternin the middle. Intheyardthere aresomeunitssuch as theshrinebuildings, residentialgroups, andservicegroups(garage,shop,bar).

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Author Keywords:- border, local knowledge, river, spatial concept,urbanhousing.

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 10

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© Copyright 2014, All rights reserved.

In recent times, terrorist attacks are happening at major locations that pose significant threat to human life and infrastructure. The terrorist attack, especially the bomb explosion, causes catastrophic damage on structures, leading to loss of life and damage to assets. Thus, protection of structures against such extreme events or loading conditions is of prime importance. The loss of life and damage of the structure can be minimized by implementing suitable mitigation measures in both structural and non-structural design. The objective of this paper is to discuss on the guidelines for analysis and design of structural components of protective structures against blast pressure for an unconfined explosion. This paper covers in detail about the protection categories, risk assessment, Level of protection and damage, blast phenomenon and methods to predicting blast pressure, dynamic analysis, design and detailing.

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Author Keywords:- Risk assessment, Level of damage, SDOF, Response, Blast phenomena, Dynamic analysis

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 12

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© Copyright 2014, All rights reserved.

The purpose of this experiment is to determine IFT and viscosity of various polymer based fluid in enhancing oil recovery (EOR). Viscosity is a property of a liquid and it is defined as the resistance of a liquid to flow. Interfacial tension is the force that holds the surface of a particular phase together. Enhanced oil recovery (EOR) is the implementation of various techniques for increasing the amount of crude oil that can extracted from a well. One of the main techniques in EOR is by pushing crude oil by some fluids. Each fluid has different viscosity and IFT. A correct knowledge of IFT and viscosity of fluids using in EOR gives petroleum engineering tool of efficiently manage the production process of field. This study aimed to experimentally investigate the effect of different concentration Sodium hydroxide (NaOH), Potassium hydroxide (KOH) & Xanthangum on fluids using EOR. Four samples of fluids with different concentration of NaOH, KOH & Xanthangum which is mixed with water and carbonated water were used in this study.

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Author Keywords:- Redwood viscometer, Tensiometer, NaOH, KOH & Xanthangum different concentration with water and carbonated water in varying temperature.

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 07

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© Copyright 2014, All rights reserved.

Filtration is used in many industries to separate water from the solid. It is important to find fluid loss in drilling, cementing, fracturing, and almost every other type of downhole treatment design. The filter cake characterization is very essential for well selection of drilling fluid problems and formation damage. Therefore this study is taken up to experimentally investigate the effect of different concentrations of CMC, Starch, Wood fibers, Soda ash, Caustic soda, Bentonite and Barite on filtration loss and formation damages. Three different samples are used in this study at different concentration and a comparison is made. Although the discussion presented here is confined to fluid loss during drilling..........

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Author Keywords:- Adiictives, Drilling fluid, Filter cake, Filtration, Fluid loss, Property testing.

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 07

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© Copyright 2014, All rights reserved.

Ensuring of permanent and continuous working process of oil-gas and field equipment alongside with the other factors, depends also on reliability of sealing units. A problem of deterioration modeling of a sealing element of a packer including into an oil field equipment complex is considered in this paper.

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Author Keywords:- corrosion, flush valves, compressor, linguistic variables, diagnosis.

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 03

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© Copyright 2014, All rights reserved.

Vineyard in Kosovo is estimated to have a great economic potential. There are thousands of hectares of vineyards that contribute to the economic potential of Rahovec by expanding the cultivation area year by year. The vines are affected by a number of viral diseases or pathologies similar to them, which significantly have an impact against the plant life and their production. Therefore, this study was conducted in several farms in Rahovec to determine whether there is a presence of viral infection in the vines. Application of Das-Elisa, Protein A-DAS and Antigen Direct Binding...........

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Author Keywords:- Antigen Direct Binding specific antibody, Das-Elisa test, Protein A-DAS, grapevine, viruses.

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 05

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© Copyright 2014, All rights reserved.

Thermodynamic modellings of the Au–Rb system was carried out by means of the CALPHAD (calculation of phase diagrams) method. The liquid phase and the intermetallic compounds Au5Rb, Au2Rb, AuRb and Au7Rb3 and Au3Rb2 (new compounds) in addition to the compound AuRb2 (suspected compound) are taken into consideration in this optimization. The substitutional solution model was used to describe the liquid phase. The six compounds are treated as stoichiometric phases. The enthalpies of formation used in these optimizations were calculated within ab-initio method in precedent work.

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Author Keywords:- CALPHAD, Au-Rb system,Thermodynamic assessment, Phase diagram..

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 07

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© Copyright 2014, All rights reserved.

First-principles calculations within density functional theory (DFT) were used to investigate intermetallics in the Al-Lu system at 0 K. The five compounds of the system were investigated in their observed experimental structures. Thermodynamic modelling of the Au–Lu system was carried out by means of the CALPHAD (calculation of phase diagrams) method. The liquid phase and the intermetallic compounds Al3Lu, Al2Lu, AlLu, Al2Lu3 and AlLu2 are taken into consideration in this optimization. The substitutional solution model was used to describe the liquid phase. The five compounds are treated as stoichiometric phases. The enthalpies of formation of the compounds were found by the ab initio calculations and used in the optimization of the phase diagram..

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Author Keywords:- First principles calculations, CALPHAD, Al-Lu system, Thermodynamic assessment, Phase diagram.

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e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 04

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© Copyright 2014, All rights reserved.