bluuebunny/crossref_metadata_2025 huggingface dataset:
Fatores condicionantes da formação do meio técnico-científico-informacional na região metropolitana do Vale do Paraíba e litoral norte
Authors: Andrade Daniel José de , Souza Adriane Aparecida Moreira de
Published: November 2015

O atual período tecnológico tem origem após 1970 e caracteriza-se, segundo Santos (2012), pela forte interação da técnica, ciência e informação, elementos responsáveis pelo surgimento de uma nova estrutura social e econômica, com implicações diretas no espaço geográfico, agora denominado meio técnico-científico-informacional. No Brasil, a distribuição de infraestrutura técnica para a modernização do país revela a heterogeneidade no território derivada das estratégias adotadas pelo Estado e pelo capital industrial e financeiro. Nesse contexto de desigualdades socioespaciais se insere a recém-criada Região Metropolitana do Vale do Paraíba e Litoral Norte (RMVPLN), composta por municípios cujas características são mais ou menos representativas do atual período tecnológico. Nesse sentido, este trabalho dedica-se a analisar o processo de modernização da RMVPLN, considerando as políticas públicas voltadas ao desenvolvimento econômico e tecnológico, implementadas ao longo das últimas cinco décadas e seus reflexos na região.
Incubadoras sociais en las universidades como promotoras de innovación y empreendimiento social para el desarrollo de las regiones: el caso del Estado de Hidalgo, México
Authors: Amador Elba Mariana Pedraza , Cadena Maribel González , Castro Judith Alejandra Velázquez
Published: November 2015

As universidades, a partir do ponto de vista social, têm a missão de acompanhar e contribuir, por meio da criação de conhecimento e formação de profissionais, na transformação rumo a uma sociedade equitativa e justa. O presente trabalho descreve o papel das universidades através das incubadoras sociais, para promover a inovação e o empreendimento social em zonas marginadas no México, a fim de facilitar o desenvolvimento sustentável e a reativação da economia melhorando o bem-estar da sociedade. Nesse sentido, no estado de Hidalgo, em diversas universidades operam programas de apoio ao setor social e produtivo através destas incubadoras. A partir de uma revisão documental se identificam as principais ações desenvolvidas pelas mais importantes incubadoras sociais do estado de Hidalgo durante os três últimos anos de operação. O resultado permite reconhecer o trabalho realizado pelas incubadoras sociais das universidades em atenção às problemáticas sociais da entidade, tais como inclusão de pessoas com deficiência e o empreendimento em regiões indígenas promovendo o planejamento e implementação de melhores maneiras de cobrir necessidades de coletivos empobrecidos e marginados, o que permite favorecer o crescimento pessoal e coletivo das regiões e da equidade.
Cálculo dos escores e estatística descritiva do WHOQOL-8 por meio do Microsoft Excel
Authors: Pedroso Bruno , Ferreira Bruna Maria Palotino
Published: November 2015

Haja vista a limitação ocasionada pela obrigatoriedade de utilização do software Statistical Package for Social Sciences (SPSS) na utilização dos instrumentos WHOQOL, o objetivo do presente trabalho foi construir uma ferramenta a partir do software Microsoft Excel para o cálculo dos escores e estatística descritiva do WHOQOL-8. Para testar a fidedignidade da ferramenta proposta, fora realizada uma aplicação do WHOQOL-8 em 56 indivíduos. Os cálculos dos resultados foram realizados por meio da ferramenta construída no presente estudo e também por meio da sintaxe SPSS proposta pelos desenvolvedores do WHOQOL-8. Os resultados retornados pela ferramenta foram comparados com os resultados retornados pelo SPSS, tendo havido 100% de coincidência entre ambos. Conclui-se que a partir do presente estudo foi possível a disponibilização de uma ferramenta alternativa, fidedigna à sintaxe original, que facilita o acesso aos resultados de aplicações do WHOQOL-8, possibilitando a obtenção dos resultados deste por meio de uma interface simples e sem a necessidade de aquisição de softwares para fins específicos e que requerem conhecimentos avançados de utilização.
Comparação do nível de Qualidade de Vida dos indivíduos com Síndrome de Down praticantes e não praticantes de atividade física
Authors: Melo Aline Cristina Sá de , César Eurico Peixoto
Published: November 2015

OBJETIVO: Comparar o nível de qualidade de vida dos indivíduos com Síndrome de Down praticantes e não praticantes de atividade física.

MÉTODO: O estudo é do tipo transversal, comparativo e de caráter qualitativo. A amostra foi composta por oito indivíduos com Síndrome de Down de ambos os sexos divididos em dois grupos, praticantes (20,2 ± 8,7 anos) e não praticantes (25,2 ± 2,0 anos) de atividade física, atendidos na Associação de Pais e Amigos dos Excepcionais (APAE), na cidade de Juiz de Fora/MG. Para realização da pesquisa foi aplicado o Questionário de Qualidade de Vida SF-36 (Medical Outcomes Study 36 – Item Short Form Health Survey), traduzido e homologado para a realidade brasileira. O questionário foi respondido pelos pais e/ou responsáveis dos indivíduos que apresentavam a síndrome, devido ao grau de deficiência de cada um deles.

RESULTADOS: Dentre os oito domínios avaliados na pesquisa, foram encontradas diferenças significativas apenas para Capacidade Funcional (75 vs. 25; p=0,042) e Saúde Mental (86 vs. 60; p=0,028), com resultados favoráveis ao grupo praticante de atividade física em relação ao grupo de não praticantes.

CONCLUSÃO: Numa avaliação geral, verificou-se que a prática de atividade física garantiu melhores resultados nos domínios Capacidade Funcional e Saúde Mental de indivíduos com Síndrome de Down, refletindo, assim, em uma melhor qualidade de vida dessas pessoas. 
A qualidade de vida e o comportamento otimista de pessoas com HIV/AIDS
Authors: Pimenta Bruno Jose Frederico , Santos Camila Ramos dos , Vieira Lenamar Fiorese , Marques Inara
Published: November 2015

OBJETIVO: Avaliar a relação entre o otimismo e os domínios de qualidade de vida em pessoas vivendo com Human Immunodeficiency Virus (HIV)/Síndrome da Imunodeficiência Adquirida (AIDS) (PVHA).

MÉTODOS: Participaram deste estudo 15 indivíduos soropositivos, assistidos por uma Organização não Governamental de Redução de Danos. Os instrumentos de avaliação foram uma anamnese para caracterização dos participantes, o questionário de otimismo em eventos futuros e o questionário de qualidade de vida (SF-36). A análise dos dados foi conduzida por meio da estatística descritiva, mediana e intervalo interquartil e Correlação de Spearman adotando p<0,05.

RESULTADOS: Constatou-se baixo nível de otimismo dos sujeitos e nível moderado de qualidade de vida. Não houve correlações significativas entre otimismo e os domínios de qualidade de vida do SF-36.

CONCLUSÃO: Os dados do presente estudo permite concluir que níveis de otimismo não influenciam na autopercepção da qualidade de vida das pessoas com HIV/AIDS que frequentam uma organização não governamental.
Un autre regard sur la campagne est possible !
Authors: Bourdeau Vincent , Cottin-Marx Simon
Published: November 2015

La recherche scientifique offre un tableau très urbano-centré du monde rural. Dans cet entretien, la ruraliste Georgette Zrinscak, maîtresse de conférence en géographie à l’université Paris 1, invite à abandonner les clichés citadins, à décoloniser nos imaginaires de la campagne fantasmée. Changer de posture nous permet de voir que la campagne garde ses spécificités, partout en Europe elle est traversée par des évolutions très hétérogènes.
Les agriculteurs, maîtres tenaces de l’accès à la terre
Authors: Barral Stéphanie , Pinaud Samuel
Published: November 2015

La politique foncière agricole française a organisé la sélection de grandes et modernes exploitations agricoles capables de nourrir les Trente Glorieuses puis d’intégrer l’économie agricole capitaliste construite au niveau européen. Elle semble aujourd’hui largement obsolète pour répondre à ses propres objectifs de renouvellement de la profession agricole et de prise en compte des enjeux environnementaux liés à l’activité agricole. Ses outils de régulation de l’accès à la terre restent, dans leur ensemble, contrôlés ou détournés par les professionnels agricoles en place, ce qui freine les nouvelles installations et le développement des démarches agroécologiques portées par des acteurs non issus du milieu agricole 1 .
Le rural, espace d’émergence d’un paradigme militant décolonial
Authors: Gervais Mathieu
Published: November 2015

Le monde rural a été le terrain, depuis les années 1970 en France, de beaucoup de luttes sociales. Que ce soit au Larzac, à Sivens, ou encore à Notre-Dame-des-Landes, les résistances et militances alternatives ont pour origine les campagnes. Mathieu Gervais revient sur l’histoire de ces paysans militants et montre en quoi ces paysans peuvent être appréhendés en tant que figures décoloniales.
Ouvrir de nouvelles portes : l’expérience de La Clef , café lecture à Brioude en Haute-Loire
Authors: Bourdeau Vincent , Cottin-Marx Simon
Published: November 2015

Lorsqu’on remonte la rue Jules Maigne, dans le centre de Brioude, sous-préfecture de la Haute-Loire, il faut aiguiser son regard pour remarquer, avant le boulevard du Docteur Devins, au fond d’une petite rue qui part sur la gauche, le café associatif La Clef . Pourtant pour les habitants de Brioude, le café-lecture de la rue de la Pardige fait désormais partie du paysage culturel local. Nous avons rencontré Xavier Lucien, altiligérien d’adoption désormais installé en région parisienne, qui fut l’un des piliers de la création du café-lecture de Brioude en 2006. Dans cet entretien, il revient sur la genèse, le rôle social et politique d’un tel lieu, et la manière dont ce dernier produit des effets jusque dans les campagnes alentour.
Les mouvements d’opposition contre les Grands projets inutiles imposés (GPII) à l’avant-garde de la ruralité ?
Authors: Grisoni Anahita
Published: November 2015

Un certain nombre de territoires pensés par les États comme espaces de relégation font l’objet de restructurations démesurées et incompatibles avec les vies autochtones. Face à ces Grand projets inutiles et imposés, des mouvements d’ampleur transnationale se sont formés. À travers l’exemple du mouvement Notav, critiquant sur le versant italien le projet d’une nouvelle ligne ferroviaire reliant Turin à Lyon, Anahita Grisoni revient sur les problématiques mises en perspective par ces formes de luttes prônant des alternatives de vie en milieu rural.
L’affect à l’école : projet thérapeutique partagé d’un élève en difficulté
Authors: Allegra Julie
Published: November 2015

La relation enseignants-élève à l’école est le lieu d’émergence privilégié d’intenses vécus affectifs. Quels facteurs facilitent la construction d’un bon espace émotionnel où se mettre en jeu pour apprendre et enseigner, et lesquels constituent, au contraire, une entrave à la possibilité d’apprendre et de vivre une harmonieuse relation d’apprentissage ? Les hypothèses formulées ici se fondent sur l’expérience de l’auteure, psychothérapeute d’enfants, ayant accompagné, pendant 5 ans, l’équipe éducative d’une école primaire de Rome d’un jeune enfant en grande difficulté scolaire, Raphaël, suivi parallèlement en psychothérapie. En nous penchant sur les conflits et les mécanismes de projections défensives circulant entre les enseignantes, les parents et l’enfant, nous verrons comment les réunions scolaires avec la psychothérapeute ont permis aux différents interlocuteurs d’entamer un dialogue autour du vécu complexe de l’enfant et d’internaliser une fonction d’étayage. La reconnaissance et l’élaboration de certains affects et aspects moins conscients du monde interne ont permis la transformation d’une expérience de souffrance à l’école en expérience positive de soi, susceptible d’alimenter la relation d’éducation et de la rendre plus gratifiante pour tous les acteurs en jeu.
Enveloppe psychique et Moi-peau dans la prise en charge groupale de patients psychotiques
Authors: Vollon Clarisse , Gimenez Guy
Published: November 2015

Notre article a pour objectif de questionner et de redéfinir les notions de Moi-peau et d’enveloppe(s) psychique(s). Cette démarche théorique, en tant que travail préliminaire, vise à introduire une étude plus globale sur la qualité et la dynamique des enveloppes psychiques que ce soit dans le cadre de prises en charge psychothérapeutiques individuelles et/ou groupales. Notre méthode consiste à revenir sur les différents apports épistémologiques, notamment ceux issus du corpus freudien afin d’apporter un éclairage différent sur les notions de Moi-peau et d’enveloppes psychiques. En effet, elles entretiennent dans la littérature une forte interdépendance. Cette démarche va nous permettre progressivement d’observer qu’il est non seulement possible d’appréhender la notion d’enveloppe psychique comme une refonte de la notion de Moi-peau mais qu’il existe plusieurs types de Moi-peau et d’enveloppes psychiques que nous nous proposons ici de répertorier pour la première fois et que nous proposons d’organiser en six catégories spécifiques.
El imperio medieval hispánico y la Chronica Adefonsi Imperatoris
Authors: Gambra Gutiérrez Andrés
Published: November 2015

La Chronica Adefonsi Imperatoris es un relato histórico de extraordinario interés. Redactado en el entorno de Alfonso VII, propone al lector una visión muy sopesada de la trayectoria del emperador, dirigida a magnificar su figura. La Crónica sitúa al monarca leonés al frente de un imperio de carácter feudo-vasallático, apto para asumir la dirección de las entidades políticas que, bajo el signo de la pluralidad, proliferaban en la Península a mediados del siglo XII; un imperio sin relación con el de su abuelo Alfonso VI, de inspiración neogótica. El cronista localiza la institución de ese imperio de nuevo cuño en el concilio de León en mayo de 1135, donde Alfonso VII fue coronado emperador, versión de los hechos que ha condicionado la imagen de su trayectoria histórica. En estas páginas se intenta demostrar que la realidad fue menos lineal y que el imperio de Alfonso VII atravesó por etapas distintas, de modo que solo en una fase tardía cabe identificar su configuración con la que le atribuye la CAI.
Properties Investigations on Metallic Fiber Reinforced Sandwich Composites
Authors: Vinayagamoorthy R. , Karthikeyan S. , Prem Bhargav R.S. , Rajivalochan T.V.
Published: November 2015

The present study deals with the usage of two types of metallic reinforcements namely bronze and steel, one natural reinforcement namely jute and an artificial reinforcement namely glass for preparation of composite laminates. The study investigates the mechanical behaviour of prepared samples and concludes with the selection of best samples. Four composite laminates were prepared by changing the compositions of reinforcements in polyester resin. Tensile, compressive, flexural and impact tests were carried out on the developed samples and it was found that the inclusion of jute and metallic reinforcements improved the compressive and impact strengths of the composite whereas inclusion of jute and glass improved the tensile and flexural strengths of the composite.
Health Monitoring of a Gear Box Using Vibration Signal Analysis
Authors: Praveen M.R. , Saimurugan M.
Published: November 2015

A gear plays a crucial role in the performance of a gear box. The faults in a gear reduces the gear life and if problem arises in shaft it affects bearing. Gear box is finally affected due to these faults. Vibration signals carries information about condition of a gear box which are captured using piezoelectric accelerometer. In this paper, features are extracted and classified using K nearest neighbours (KNN) algorithms for both time and frequency domain. The effectiveness of KNN in classification of gear faults for both time and frequency domain is discussed and compared.
A Study on the Classification Ability of Decision Tree and Support Vector Machine in Gearbox Fault Detection
Authors: Saimurugan M. , Praveenkumar T. , Krishnakumar P. , Ramachandran K.I.
Published: November 2015

Gearbox is the only medium which balances the power and torque relations for the appropriate operating conditions, at very high speeds it controls the power output of the drive unit. Its application is wide in the field of automotive and industries. Condition monitoring of gearbox access the operating condition of the gearbox components such as gears and, bearings to take necessary condition based maintenance to avoid the machine downtime and operation losses. This paper identifies the suitable accelerometer position to acquire vibration signals for identification of gear faults using machine learning techniques. The study includes 2 fault class, 2 gear speeds (1st and 4th gear), 3 loading conditions and, 3 operating speeds each for 2 sensor locations. Features were collected for each class in both sensor location points from accelerometer. Statistical features were extracted and the classification efficiencies were calculated from both SVM and J48 Decision tree algorithm.
Numerical Study on the Effect of Free Rotating Vaneless Diffuser of Exit Diameter to Inlet Diameter Ratio 1.3 with Speed Ratio 0.50 on Centrifugal Compressor Performance
Authors: Seralathan S. , Roy Chowdhury D.G.
Published: November 2015

Innovative methods in the design of radial diffuser are necessary for reducing the energy losses associated with diffusion in order to design an efficient centrifugal compressor. Rotating vaneless diffusers is one such concept, in which a particular type, free rotating vaneless diffuser, the diffuser speed becomes a fraction of the rotating impeller speed and rotates independently. In this paper, an impeller with stationary vaneless diffuser alone of diffuser diameter ratio 1.40 and the same impeller with a freely rotating vaneless diffuser of diffuser diameter ratio 1.30 along with stationary vaneless diffuser at downstream for the remaining radius ratio are analyzed for flow diffusion and performance. Higher static pressure rise with reduced stagnation pressure losses and a marginally lesser efficiency by around 3.5% compared to SVD is achieved by the free rotating vaneless diffuser configuration (FRVD30SR0.5).
Investigation of Engineering Properties of Paddy Grown in the Coastal Climate of Eastern India
Authors: Pattanayak Binayak , Shankar Mohapatra Siba , Patel Umakanta , Das Harish Chandra
Published: November 2015

The objective of the present study is to investigate the engineering properties of paddy (One-thousand-one) grown in the coastal region of Odisha (India). The average length, width and thickness of paddy are measured as 8.80 mm, 2.65 mm and 1.91 mm respectively at moisture content of 28% (wb). The mean bulk density and true density of the particular variety of paddy are measured to be 0.61 g/cc and 1.47 g/cc. Properties like equivalent diameter, sphericity, grain volume, grain surface area, aspect ratio and porosity are calculated to be 3.58 mm, 0.40, 24.00 mm3, 35.66 mm2, 0.30, 58.24% respectively. The angle of repose and angle of friction of the paddy grains are determined to be 37.73o and 0.43o, 0.25o, 0.30o with plywood, glass and galvanized iron respectively. These engineering properties are useful in design of forced convection dryer for the drying and processing of paddy.
Employee Involvement and Management Commitment in Lean Implementation
Authors: Jobin M.V.
Published: November 2015

Implementation of Lean Manufacturing in Indian Industries is not very successful. Studies have been conducted in this area and the main reason behind this has identified to be Human related issue. But no studies with regard to employees has been done. This Paper deals with a pilot study in a tyre Factory .It is about the level of employee involvement and management commitment in implementing Lean .A survey questionnaire was developed and its validity was tested using Chronbach’s alpha. TThe questionnaire was answered by the employees .It was found that lack of management commitment and improper communication has reduced the employee involvement in lean initiatives. Based on the findings a case study was conducted in Horizontal Bias Cutter. Improving the working conditions based on the study helped to improve employee involvement .This helped in improving the overall efficiency of Horizontal Bias Cutter.
Factors Affecting Leadtime in Spinning Mills
Authors: Anand K.T. , Rajan A.John , Narayanan K.V.
Published: November 2015

An investigation of the factors which affect lead time in spinning mills producing carded and combed counts is reported. Data were collected from 27 mills producing 40 Ne Carded Yarn and 9 mills producing 40 Ne Combed Yarn. A number of 13 parameters which affect lead time were identified and they are FQI (Fibre Quality Index), Roving Production, CSP (Count Strength Product), Yarn Realisation, Spindle Production, Top Arm Roller Pressure (Front), Top Arm Roller Pressure (Middle), Top Arm Roller Pressure (Back), End Breaks, UKG, HOK (the number of Operative Hours required to produce 100 kg of yarn), YQI (Yarn Quality Index), Machine Utilisation. Multiple linear regression analysis have been carried out to find out the dominant parameters which affect lead time. While 71.4% of the variables account for lead time in respect of carded counts, about 78.4% of the variables have dominating influence in combed yarns.
Development of Corrosion Resistance Coating for AISI 410 Grade Steel
Authors: Girisha K.G. , Rakesh R. , Durga Prasad C. , Sreenivas Rao K.V.
Published: November 2015

In this present research work, corrosion behaviour of grit blasted AISI 410 steel substrate coated with NiCr/Al2O3,NiCr/ZrO2 particles was investigated using salt spray test as per ASTM B117. Coatings were prepared using air Plasma spray process. Nickel chromium was used as bond coat for obtaining good fastening between the base metal and coated particles. The microstructures of the coated and un-coated specimens were characterized using scanning electron microscope and optical microscope. Distribution coated particle was found uniform throughout the steel substrate was revealed from SEM microphotographs. The obtained results shows significant improvement in corrosion resistance and micro hardness for NiCr/Al2O3 and NiCr/ZrO2 coating deposited on steel by plasma spray process than the as sprayed base steel substrates.
Effect of Alkali Treatment on Tensile and Physicochemical Characterization of Cissus quadrangularis Fiber
Authors: Mayandi K. , Rajini N. , Pitchipoo Pandian , Arumugaprabu V. , Vishnudev P.K. , Vetrivel M. , Vignesh K.
Published: November 2015

Abstract. This article described about the effect of surface modification on newly identified natural fiber in the name of veldt grape stem fibers (cissus quadrangularis) were extracted and investicated. The extracted veldt grape stem fibers (VSF) is treated with alkali chemical with various concentrations like 5%, 10 % and 15 % for a constant soaking time of 60 min. The true cross sectional areas were measured for treated and untreated fibers using electron microscope and image J software. The tensile properties of chemically treated fiber were studied using Instron universal testing machine and found the better tensile properties on 10% chemical concentrations, which considered as optimum case of alkali treatment. The fibers density, chemical compositions like cellulose, lignin, wax, moisture and ash content also studied for optimal case based on tensile strength. The characterization of optimally NaOH treated fibers was analysed by using of XRD technique.
Mechanical and Morphological Studies of Al6061-Gr-SiC Hybrid Metal Matrix Composites
Authors: Lokesh T. , Mallikarjun U.S.
Published: November 2015

Abstract. In recent years, Aluminium alloy based metal matrix composites (MMC) are gaining wide spread acceptance in several aerospace and automobile applications. These composites possess excellent wear resistance in addition to other superior mechanical properties such as strength, modulus and hardness when compared with conventional alloys. The hybrid composites are new generation of composites containing more than one type, shape or sizes of reinforcements giving superior combined properties of reinforcements and the matrix. In the present work, Al6061 has been used as matrix material and the reinforcing materials selected were SiC and Graphite particulates of 10 to 30µm size. Composites Al6061-Gr (2- 8 wt. %), Al6061-SiC (2 -10wt. %) and Hybrid composites with Al6061 matrix alloy containing 3wt% graphite and varying composition of 2-10wt% SiCp were prepared by stir casting technique. The cast matrix alloy and its composites have been subjected to solutionizing treatment at a temperature of 530 ± 20C for 6 hours, followed by ageing at a temperature of 175 ± 20C for 6 hours. The mechanical properties of as cast and T6 heat treated composites have been evaluated as per ASTM standards and compared. Addition of Graphite particulates into the Al6061 matrix improved the strength and ductility of the composites. Significant improvement in tensile strength and hardness was noticed as the wt. % of SiCp increases in Al6061-SiC composites. Addition of Graphite into Al6061-SiC further improved the strength and ductility of hybrid composites. The heat treatment process had the profound effect in improving the mechanical properties of the studied composites. The microstructural studies revealed the uniform distribution of SiC and Gr particles in the matrix system.
Synthesis and Characterization of Cu-Al-Be-Mn Quaternary Shape Memory Alloys Prepared by Induction Melting Technique
Authors: Shivasiddaramaiah A.G. , Mallikarjun U.S. , Prashantha S.
Published: November 2015

Shape memory materials are stimuli-responsive materials. They are widely used in military, medical, safety, and robotics applications. Until recently, only Ni-Ti based SMA’s are commercially used due to its relatively ease of manufacturing. However, the exorbitantly high cost of Ni-Ti based SMA limits its application to niche markets such as medical stents, aerospace and defence. Recently, it is found that Cu based alloys exhibit shape memory behavior. Out of which, Cu-Al-Be-Mn is most interesting SMA in terms of less process complexity and low cost. Cu–Al–Be-Mn shape memory alloys in the range of 09–15 wt.% of aluminium and 0.1-0.4 wt.% of Beryllium and 0.1 to 0.3 wt.% of Manganese, exhibiting β-phase at high temperatures and manifesting shape memory effect upon quenching to lower temperatures, were prepared through ingot metallurgy. The alloy ingots were homogenized followed by step quenching so as to obtain a structure that is completely martensitic. They were subsequently characterized by X-ray diffractogram (XRD), Differential Scanning Calorimetry (DSC) and Optical Microscope (OM). The shape memory properties of the alloys were studied by bend test. This paper emphasizes the synthesis and characterization of the Cu-Al-Be shape memory alloys.
Development and Analysis of Automotive Component Using Aluminium Alloy Nano Silicon Carbide Composite
Authors: Yadav Govind , rana Ravindra singh , Dwivedi R.K. , Tiwari Ankur
Published: November 2015

Composite materials are important engineering materials due to their outstanding mechanical properties. Composites are materials in which the desirable properties of separate materials are combined by mechanically binding them together. Each of the components retains its structure and characteristic, but the composite generally possesses better properties. Composite materials offer superior properties to conventional alloys for various applications as they have high stiffness, strength and wear resistance. The development of these materials started with the production of continuous-fiber-reinforced composites. The high cost and difficulty of processing these composites restricted their application and led to the development of discontinuously reinforced composites. The aim involved in designing metal matrix composite materials is to combine the desirable attributes of metals and ceramics. The addition of high strength, high modulus refractory particles to a ductile metal matrix produce a material whose mechanical properties are intermediate between the matrix alloy and the ceramic reinforcement. Metal Matrix Composites with Aluminum as metal matrix is the burning area for research now a days.
Electro Discharge Machining of WC/Ni Mixed Ceramic
Authors: Chandrasekaran Vasudevan , Kanagarajan D. , Karthikeyan R.
Published: November 2015

Proper selection of manufacturing conditions is one of the most important aspects in the die sinking Electrical Discharge Machining (EDM) process, as these conditions determine important characteristics such as Material Removal Rate and Surface Roughness.In this work, mathematical models have been developed for relating the Material Removal Rate (MRR) and Surface Roughness (Ra), to machining parameters like tool rotational speed (S), discharge current (C), pulse-on time (T) and flushing pressure (P). The experiment plan adopts the centered central composite design unblocked (CCD). The separable influence of individual machining parameters and the interaction between these parameters are also investigated by using analysis of variance (ANOVA). This study highlights that the proposed mathematical models have proven to fit and predict values of performance characteristics close to those readings recorded experimentally with a 95% confidence interval. Results show that are the two significant factors affecting MRR (discharge current and flushing pressure). The discharge current, flushing pressure and electrode rotation have statistical significance on the Ra.
Evaluation of Cutting Force and Surface Roughness in Turning of GFRP Using Coated Carbide Insert
Authors: Ramesh Kannan C. , Padmanabhan P , Vasantha Kumar K.P.
Published: November 2015

This paper is to evaluate the cutting force and surface roughness in turning of Glass fiber reinforced plastics (E-glass fiber) using coated carbide insert. The comparison of the results with uncoated carbide inserts. The carbide insert is coated by multilayer chemical vapour deposition process, the coating elements are TiN/Al2O3/TiCN. The experiment is carried out in the conventional lathe machine under dry condition by varying the three cutting parameter such as speed, feed and depth of cut. The cutting force is measured using a lathe tool dynamometer and surface roughness are measured by using surf tester.The result of the experiment shows the effect of machining parameter on cutting force and surface roughness. The results have confirmed that the coated carbide insert has better results than uncoated and tool life is increased.
Multiple Performance Optimization in WEDM Parameters Using Grey Relational Analysis
Authors: Rajmohan T. , Krishna Gopi , Singh Ankit Kumar , Swamy Naidu A.P.V.
Published: November 2015

In this investigation, a new approach is based on Grey Relational Analysis and Taguchi method to optimize the machining parameters with multi performance characteristics in WEDM of 304L SS. Experiments are conducted using Taguchi Quality Concept, L9,3-level orthogonal array was chosen for experiments .The WEDM parameters namely pulse-on time (TON), pulse-off time (TOFF), and wire feed (WF) on material removal rate (MRR) .The Grey Relational Analysis with multiple performance characteristics indicates that the pulse-on time (TON), pulse-off time (TOFF) are the most significant factors . The optimum machining parameters have been identified by Grey relational analysis and significant contribution of parameters can be determined by analysis of variance (ANOVA). The confirmation test is also conducted to validate the test result. The results from this study will be useful for manufacturing engineers to select appropriate WEDM process parameters to machine 304L Stainless Steel.
Multi Response Optimization of Process Parameters on AA8011 Friction Stir Welded Aluminium Alloys Using RSM Based GRA Coupled with DEA
Authors: Palani K. , Elanchezhian C.
Published: November 2015

The friction stir welding process is the newly developed material joining process used to join the different materials which are very difficult to join in the conventional fusion welding process. In this investigation using the specially designed straight cam profiled tool, the multiple responses of Ultimate tensile strength, Ultimate yield strength and Percentage of elongation with the process parameters of rotational speed, tool tilt angle and feed rate are optimized. The five level, three factor rotatable central composite design is selected to optimize the responses of friction stir welded AA 8011 aluminium alloys. The highest gray relational grade with the highest relative efficiency is found using the gray relational analysis coupled with the data envelopment analysis to predict the optimum parameters. It exposes that at the rotational speed of 680 rpm, the tool tilt angle of 98 degrees and the feed rate of 24 mm/min the good weld quality can be attained.
Optimization of GMAW Parameters to Improve the Mechanical Properties
Authors: Saravanan S. , Pitchipoo Pandian
Published: November 2015

In this paper, multi objective optimization of Gas Metal Arc Welding GMAW) parameters are carried out to yield good mechanical strength in welded joints. Most of the failures are occurred on the welded elements due to the setting of improper welding parameters. The strength of welded joints in GMAW depends on several input process parameters such as welding current, welding voltage, gas flow rate, torch angle, welding speed, wire size and electrode feed rate. Wrong selection of these process parameters will lead to bad quality welds. So there is a need to control the process parameters to obtain good quality welded joints. For getting the better values of these parameters, it needs to conduct experiments by varying the input process parameters that are affecting the strength of the welded joints. In this work nine experimental runs based on an L9 orthogonal array of Taguchi method are performed to optimize the strength of the welded joint. To achieve this Grey Relational Analysis (GRA) is used. In this work Aluminum6063 material is used as base material.
Sensitivity Analysis for Process Parameters in Cladding of Austenitic Stainless Steel by Pulsed Metal Inert Gas Welding Process
Authors: Prabhu R. , Alwarsamy T.
Published: November 2015

In recent scenario, the automation in weld cladding process has a challenging task for most of the industries like automotive, petrochemical and food processing industries. Because to achieve the best quality of the weld clad bead geometry during automated process it is important to have complete control over the selected process parameters. The cladding process enhances the base material properties. Therefore, it is essential to predict the relationship between the process parameters and response the second order polynomial regression equation has to be developed. It makes more effectiveness of automated weld cladding processes. Palani and Murugan [1] developed a mathematical model for a flux cored arc welding process using an RSM method to study the direct effects and interaction effects of process parameters on clad bead geometry.
An Approach on Fuzzy and Regression Modeling for Hard Milling Process
Authors: Tamilarasan A. , Rajamani D. , Renugambal A.
Published: November 2015

This paper proposes the prediction of cutting temperature, tool wear and metal removal rate using fuzzy and regression modeling techniques for the hard milling process. The feed per tooth, radial depth of cut, axial depth of cut and cutting speed were used as process state variables.The experiements were conducted using RSM based central composite rotatable design methodology. Regression and fuzzy modeling were used to evaluate the input – output relationship in the process. It is interesting to observe that the R2 and average error values for each response are very consistent with small variations were obtained.Also, the confirmation results show that very less relative error varitions. Thus, the developed fuzzy models directly integrated in manufacturing systems to reduce the more computational complexity in the process planning activities.
Studies on Parametric Optimization for Plasma Sprayed Fly Ash - Al2O3 Composite Coatings
Authors: Naveena B.E. , Keshavamurthy R. , Channabasappa B.H.
Published: November 2015

Present investigation deals with the effect of varying process parameters on the characterization of plasma sprayed fly ash - Al2O3 composite coatings using Taguchi’s experimental design method to conduct experiments and optimization of process parameters. Parameters such as standoff distance, powder feed rate and current density were considered for the optimization of bond strength, porosity and hardness. The significance of the parameters and their optimum level is determined by using ANOVA. Experiments were carried out to validate the effect of optimum process parameters on response characteristics and found that selected optimal combination of process parameters is able to achieve the best results.
Optimizing the Coating Parameters for Coated Aluminium Alloy 2024 T351 by Using Factor Analysis Method
Authors: Navas R. Kaja Bantha , Rajan A.John , Topno Udit R. , Chaitanya Sindiri
Published: November 2015

This paper presents a novel approach for the optimization of input parameters on coated aluminum alloy 2024 T351 with Factor analysis method. These Experiments are conducted by varying the input parameters related to surface hardness and surface roughness. In this study, input parameters like coating thickness, substrate temperature and deposition rate are optimized with the considerations of multi responses such as surface hardness and surface roughness. L4 orthogonal array was taken to conduct the experiments. The method shows a good convergence with the experimental and the optimum coating parameters where the maximum surface hardness and the minimum surface finish are obtained.
Swirling Fluidized Bed Polishing: A New Non-Conventional Method of Surface Modification
Authors: Francis N.K. , Viswanadhan K.G. , Paulose M.M.
Published: November 2015

Swirling Fluidized Bed Polishing (SFBP) is a non–traditional alternative abrasive flow surface finishing form of Fluidized Bed Machining (FBM) in which the former has special features to overcome certain significant limitations of the latter, namely the variation of the surface roughness vertically along the component surface and the screening effect owing to the complex contours in the work piece geometry. Owing to its ability to perform machining and generate polished surface from a roughness value of Ra 1.2μ to 0.2 μ within 8 hours of processing, this new method offers greater scope in the surface modification of rough machined surfaces with complex geometry such as component with ducts and grooves. This research focus on investigating the effect of abrasive particle concentration on metal removal rate per unit area of the specimen surface. 3D surface morphology analysis investigates the quality of the polished surface and the study of circumferential uniformity and machining accuracy analysis on a complex-contoured component further investigate its scope and relevance in industrial applications.
Analysis of the Fluid Flow in 3D Symmetric Enlarged Channel
Authors: Ramanathan Seranthian , Thansekhar M.R. , Rajesh Kanna P. , Shankara Narayanan S.
Published: November 2015

A 3-Dimensional fluid flow over the sudden expansion region of a horizontal duct for various Reynolds numbers have been studied by using the CFD Software package ANSYS Workbench Fluent v 13.0. The expansion ratio and aspect ratio for the sudden expansion are taken as 2.5 and 4 respectively. This work deals with the finding of critical Reynolds number for a fluid and also the length of re-attachments on stepped walls at various Reynolds numbers for the same fluid. The simulation is carried out in sudden expansion for Reynolds number ranging from 200 to 4000. The variations of local Nusselt number along the stepped walls of the sudden expansion are presented with the heat flux of 35 W/m2 on the stepped walls. Also, the plots of pressure coefficient (Cp) along the stepped walls for different Reynolds numbers are presented in this work.
Design and Development of V-Grooved Natural Convection Solar Air Heater for Odisha
Authors: Lakshmi D.V.N. , Mohapatra S.S. , Satheesh Anbalgan , Das Harish
Published: November 2015

This paper presents an experimental study of natural convection V-grooved solar heater. Based on the experimental study, the first law and second law efficiencies and entropy generation have been calculated considering the available radiation under the meteorological conditions of Bhubaneswar, Odisha, India. Experiments were conducted during the month of November 2014 to March, 2015 for studying the performance characteristics of the solar air heater. The results obtained are quite significant with respect to outlet air temperature as compared to other solar heaters. The maximum air heater efficiency was found to be 16.91%, calculated at a mass flow rate of 3.55 gm/s of air and the second law efficiency was 6.72%.
Enhancement of Productivity on Double Slope Single Basin Solar still by Flat Plate Collector and Sponge
Authors: Prabahar J. , Balusamy Thangavel , John Varghese M.
Published: November 2015

One of the essential needs of a living thing on earth is the pure water and nowadays this valuable natural resource is facing severe scarcity problems. Solar distillation is a better choice to minimize this problem by harvesting solar radiation in solar still and thereby producing pure water from hard water or brine. In this work, an attempt was made to enhance the productivity of still by flat plate collector, sponge, the combination. Finally, the productivity of the simple still was compared with that of a flat-plate collector, sponge, the combination. Use of flat plate collector and sponge increases the overall temperature of the still water and enhance the evaporation respectively thereby this will improve the condensate production of the solar still. It was observed that productivity increased by 14% in case of still with a collector, 10% for still with a sponge and 17% for still with collector sponge combination when compared with simple still.
Numerical Investigation of Fluid Flow and Heat Transfer in Finned Micro-Channels with Nanofluids
Authors: Kumar Deepak , Mishra D.P.
Published: November 2015

Conservation equations of mass, momentum and energy have been solved using Fluent 14 to compute the Nusselt number and wall temperature of a finned rectangular Micro-channel for a laminar flow for water and nanofluids under mixed flow condition. Alumina based water is considered as nano fluid for the present investigation. It has been found from the numerical investigation that as the percentage of alumina is increased in the base fluid (water) the heat transfer rate is increased. It has been found that the wall temperature decreases with increase in fin number. The heat transfer is found to be more in rectangular shaped fin compared to any other shape both for the water and nanofluid. In addition to thermal characteristics, the variation of pressure drop for different fin number has also been investigated.
Numerical Study on Heat Transfer Enhancement in a Circular Dimpled Surface by Using Inline and Staggered Pattern at Laminar Flow Regimes
Authors: Ravikumar T.S. , Seralathan S. , Micha Premkumar T. , Guntamadugu Hemanth Kumar
Published: November 2015

This paper presents the numerical studies of an irregular surface – a circular dimpled surface with different patterns of dimple arrangement (i.e., inline and staggered) and to identify the one that gives maximum heat transfer rate under laminar flow conditions. The comparative studies are made with a flat plate. The studies are carried out with inlet velocities 1 m/s and 49 m/s at laminar flow regimes. The investigations revealed that heat transfer rate increases as the air flow velocity increases and it decreases as the air flow velocity is decreased. Also, air flow contact with heated plate plays a vital role in heat transfer rate. Based on the study, it is concluded that the heat transfer rate depends on the surface area, air flow velocity and the air flow contact with the heated plate. At air velocities 1 m/s and 49 m/s, the heat transfer rate is highest for the circular dimple with staggered pattern under the laminar flow conditions.
Transient Heat Transfer Solution Using Improved Lumped Model
Authors: Chatrath Anmol , Grover Neel Kanth
Published: November 2015

In present study, transient state one-dimensional heat conduction is analyzed using polynomial approximation method. In comparison with the classical lumped model, an improved lumped model have been employed as the classical lumped model is applicable for biot number of less than 0.1 and it cannot be used for high temperature gradient. An improved lumped model has been employed for sphere to calculate average temperature as a function of time for higher and lower values of biot number. The study shows that the lumped model provides better accuracy as compared to finite difference model.
Experimental Investigation of Heat Transfer in Coated Microchannels for MEMS Applications
Authors: Anbumeenakshi C. , Thansekhar M.R. , Satheeshkumar M. , Vishnu Gayathri R.
Published: November 2015

The microchannel cooling technique appears to be a viable solution to high heat rejection requirements of today’s high-power electronic devices. The thermal design of the small electronics cooling devices is a key issue that needs to be optimized in order to keep the system temperatures at certain levels. Thus the need of microchannel became vital. This present work investigates the experimental work conducted in a coated rectangular microchannel heat sink of hydraulic diameter of 0.763 mm for a heat input of 250 to 1020 Watt with water to study the heat transfer characteristics with two types of header arrangement such as rectangular header and trapezoidal header. The header plays a significant role in distributing the water in to the channels. The uniform distribution of water leads to uniform heat transfer in microchannels. From the experimental results carried with two types of header arrangements, it was found that coated rectangular microchannel with trapezoidal header gives better heat transfer characteristics for the range of heat inputs.
Thermodynamic Modeling of Single Cylinder Direct Injection Compression Ignition Engine in Simulink
Authors: Ravichettu Sindhu , Amba Prasad Rao G. , Madhu Murthy K.
Published: November 2015

The aim of this research is to develop a mathematical model of a compression ignition engine using cylinder-by-cylinder model approach to predict the performances; indicated work, indicated torque, in-cylinder pressures and temperatures and heat release rates. The method used in the study is based on ideal diesel cycle and is modified by the numerical formulations which affect the performance of the engine. The model consists of a set of tuning parameters such as engine geometries, EGR fractions, boost pressures, injection timings, air/fuel ratio, etc. It is developed in Simulink environment to promote modularity. A single-zone combustion model is developed and implemented for the combustion process which accounts for ignition delay, heat release. Derivations from slider-crank mechanism are involved to compute the instantaneous volume, area and stroke at any given crank angle. The results of the simulation model have been validated with experimental results with a close match between them.