4,746 research outputs found

    The Effects of Additives on the Physical Properties of Electroformed Nickel and on the Stretch of Photoelectroformed Nickel Components

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    The process of nickel electroforming is becoming increasingly important in the manufacture of MST products, as it has the potential to replicate complex geometries with extremely high fidelity. Electroforming of nickel uses multi-component electrolyte formulations in order to maximise desirable product properties. In addition to nickel sulphamate (the major electrolyte component), formulation additives can also comprise nickel chloride (to increase nickel anode dissolution), sulphamic acid (to control pH), boric acid (to act as a pH buffer), hardening/levelling agents (to increase deposit hardness and lustre) and wetting agents (to aid surface wetting and thus prevent gas bubbles and void formation). This paper investigates the effects of some of these variables on internal stress and stretch as a function of applied current density.Comment: Submitted on behalf of TIMA Editions (http://irevues.inist.fr/tima-editions

    The optimal P3M algorithm for computing electrostatic energies in periodic systems

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    We optimize Hockney and Eastwood's Particle-Particle Particle-Mesh (P3M) algorithm to achieve maximal accuracy in the electrostatic energies (instead of forces) in 3D periodic charged systems. To this end we construct an optimal influence function that minimizes the RMS errors in the energies. As a by-product we derive a new real-space cut-off correction term, give a transparent derivation of the systematic errors in terms of Madelung energies, and provide an accurate analytical estimate for the RMS error of the energies. This error estimate is a useful indicator of the accuracy of the computed energies, and allows an easy and precise determination of the optimal values of the various parameters in the algorithm (Ewald splitting parameter, mesh size and charge assignment order).Comment: 31 pages, 3 figure

    The Influence of Community Empowerment, Organizational Commitment, and Organization Learning on Performance of MSMEs South Minahasa Regency-Indonesia

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    The aims of this research are to analyze the influence of (1) Community Empowerment on the performance of MSMEs (2) Learning organization on the performance of MSMEs (3) Community Empowerment on Organizational Commitment (4) Learning Organization on Commitment. This research used Quantitative method by involving 354 samples comprising the owners (for variable of the performance of MSMEs) and employees (for variable of learning organization, community empowerment and organizational commitment). This research was conducted at MSMEs in 17 districts of South Minahasa Regency. Data analysis technique used is SEM (structural equation modeling) and the CFA test (Confirmatory Analysis factor). Models were tested by comparing the model alignment criteria.The results of the research show that four variables are directly significant or proven to be influential. Those variables are: (1) Community Empowerment to the performance of MSMEs (2) Learning Organization directly influences the performance of MSMEs (3) Community Empowerment directly influences Organizational Commitment (4) Learning Organization to Organizational Commitment. Exogenous variables (learning organization, community empowerment) are proved to have an impact on the performance of MSMEs. The findings in this study lead to the need for the development of economic education curriculum such as training, as well as mentoring process, as an effort to improve human resources. Keywords: Community Empowerment, Organizational Commitment, Learning Organization, Performance of MSMEs DOI: 10.7176/EJBM/11-18-05 Publication date:June 30th 201

    Behavior’s Green Consumer Model Development (Green Consumer Study in North Sulawesi, Indonesia)

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    The purpose of this study is to analyze and explain the relationships and effects of green marketing, theory of planned behavior on green consumerism and environmental sustainability through green consumer behavior. The research design uses a quantitative approach through survey methods. The population in this study are consumers who buy and are willing to conduct interviews about green products in modern markets and souvenirs in a number of districts / cities in North Sulawesi province. The research sample analyzed was 381 respondents. Sampling using a purposive sampling technique with data analysis techniques using structural equation models with the help of AMOS, SPSS, and Ms Exel programs. A number of variables in this study are green marketing, theory of planned behavior, green consumer behavior, green consumerism and environmental sustainability.The research findings produce: 1) Equation 1 formed Y1 = 0.408 X1 + 0.195 X2, meaning that green marketing and the theory of planned behavior have a positive relationship and have a significant effect on green consumer behavior; 2) Persuasion 2 is formed Y2 = 0.137 X1 + 0.130 X2 + 0.489 Y1, meaning green marketing and theory of planned behavior have a positive relationship and have a significant effect on green consumerism through green consumer behavior; 3) Perservation 3 is formed Y3 = 0.122 X1 + 0.021 X2 + 0.570 Y1, meaning that green marketing and theory of planned behavior have a positive relationship and have a significant effect on environmental sustainability through green consumer behavior. With the findings of this study, it can be concluded that the green consumer behavior model is a model that can be considered in developing green product development strategies. Keywords: Green Marketing, Theory of Planned Behaviour, Green consumer behavior, Green consumerism, Environmental sustainability DOI: 10.7176/EJBM/11-27-15 Publication date:September 30th 201

    Зміст та основні цілі стимулювання збуту на підприємстві

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    Стаття присвячена висвітленню сутності стимулювання підприємства, як важливої складової для забезпечення ефективного його функціонування, а також проаналізовано головні завдання, та основні переваги та недоліки заходів, які використовуються у системі стимулювання збуту. У статті розглянуто зміст стимулювання збуту продукції підприємства, його цілі та завдання. Виявлено, що стимулювання збуту ‒ це система короткострокових спонукальних заходів на тимчасовій або територіальній основі, що чинить вплив на трьох учасників ринку (споживачів, торгових посередників, торговий персонал), яка покликана стимулювати негайне здійснення покупки і прискорений збут продукції. Наведена характеристика сучасних засобів і прийомів стимулювання збуту. Розглянуто класифікацію стимулювання збуту продукції підприємства за виникненням і впливом на покупців. Дістали подальшого розвитку теоретичні положе ння стимулювання збуту, в тому числі визначення його основних напрямків.The article is devoted to highlighting the essence of stimulating the enterprise as an important component for ensuring its effective functioning, and also analyzed the main tasks and the main advantages and disadvantages of those used in the sales promotion system. The article deals with the content of sales’ promotion in the complex of product promotion, its goals and tasks. It is found that sales promotion is a system of short-term incentives on a temporary or territorial basis, affects three market part icipants (consumers, resellers, sales personnel), which is designed to stimulate immediate purchase and accelerated sales. The characteristic of modern means and methods of sales’ promotion is given. The classification of sales promotion in the work on occurrence and influence on buyers is described. The theoretical positions of sales’ promotion were furt her developed, the main directions of sales promotion were established

    Consumption Behavior of Economics Education Students Faculty of Economics, State University of Manado

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    This study aims to determine the influence of financial literacy and social environmental factors on consumption behaviour of Economics Faculty of Economics students of Manado State University. The design of this study using the quantitative approach with survey method, with the number of samples is 67 students as respondents through proportionate stratified random sampling. The research instrument used questionnaire with a Likert scale which then tested the validity and reliability. Data analysis techniques include 1) Descriptive analysis; 2) Classical assumption test, and 3) Multiple linear regression analysis. The results showed: 1). There is a significant influence on financial literacy and student consumption behaviour, with the influence of financial literacy on student consumption behaviour of 54.4%; 2). There is a significant influence on social environment factor with student consumption behaviour, with the influence of social environment factor to student consumption behaviour equal to 37.5%; and 3). There is the influence of variable of financial literacy and social environment factor to student consumption behaviour variable with a contribution equal to 78.6%. Conclusion, partially or simultaneously financial literacy and social environmental factors have a significant effect on the consumption behaviour of students of Economics Education Faculty of Economics, State University of Manado

    3-(4-Methoxy­phen­yl)isochroman-1-one

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    In the mol­ecule of the title compound, C16H14O3, the aromatic rings are oriented at a dihedral angle of 72.02 (6)°. The heterocyclic ring adopts a twisted conformation. In the crystal structure, there are C—H⋯π contacts between the heterocyclic and phenyl rings, and between the methyl group and methoxy­phenyl ring

    K-edge X-ray absorption spectra in transition metal oxides beyond the single particle approximation: shake-up many body effects

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    The near edge structure (XANES) in K-edge X-ray absorption spectroscopy (XAS) is a widely used tool for studying electronic and local structure in materials. The precise interpretation of these spectra with the help of calculations is hence of prime importance, especially for the study of correlated materials which have a complicated electronic structure per se. The single particle approach, for example, has generally limited itself to the dominant dipolar cross-section. It has long been known however that effects beyond this approach should be taken into account, both due to the inadequacy of such calculations when compared to experiment and the presence of shake-up many-body satellites in core-level photoemission spectra of correlated materials. This effect should manifest itself in XANES spectra and the question is firstly how to account for it theoretically and secondly how to verify it experimentally. By using state-of-the-art first principles electronic structure calculations and 1s photoemission measurements we demonstrate that shake-up many-body effects are present in K-edge XAS dipolar spectra of NiO, CoO and CuO at all energy scales. We show that shake-up effects can be included in K-edge XAS spectra in a simple way by convoluting the single-particle first-principles calculations including core-hole effects with the 1s photoemission spectra. We thus describe all features appearing in the XAS dipolar cross-section of NiO and CoO and obtain a dramatic improvement with respect to the single-particle calculation in CuO. These materials being prototype correlated magnetic oxides, our work points to the presence of shake-up effects in K-edge XANES of most correlated transition metal compounds and shows how to account for them, paving the way to a precise understanding of their electronic structure.Comment: 6 pages, 4 picture

    Relic gravitational waves and present accelerated expansion

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    We calculate the current power spectrum of the gravitational waves created at the big bang (and later amplified by the different transitions during the Universe expansion) taking into account the present stage of accelerated expansion. Likewise, we determine the power spectrum in a hypothetical second dust era that would follow the present one if at some future time the dark energy, that supposedly drives the current accelerated expansion, evolved in such a way that it became dynamically equivalent to cold dark matter. The calculated power spectrum as well as the evolution of the density parameter of the waves may serve to discriminate between phases of expansion and may help ascertain the nature of dark energy.Comment: 20 pages, uses revtex4, 1 figure ps and 3 figures eps. To be published in Physical Review

    Initial results of multilevel principal components analysis of facial shape

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    Traditionally, active shape models (ASMs) do not make a distinction between groups in the subject population and they rely on methods such as (single-level) principal components analysis (PCA). Multilevel principal components analysis (PCA) allows one to model between-group effects and within-group effects explicitly. Three dimensional (3D) laser scans were taken from 240 subjects (38 Croatian female, 35 Croatian male, 40 English female, 40 English male, 23 Welsh female, 27 Welsh male, 23 Finnish female, and 24 Finnish male) and 21 landmark points were created subsequently for each scan. After Procrustes transformation, eigenvalues from mPCA and from single-level PCA based on these points were examined. mPCA indicated that the first two eigenvalues of largest magnitude related to within-groups components, but that the next largest eigenvalue related to between-groups components. Eigenvalues from single-level PCA always had a larger magnitude than either within-group or between-group eigenvectors at equivalent eigenvalue number. An examination of the first mode of variation indicated possible mixing of between-group and within-group effects in single-level PCA. Component scores for mPCA indicated clustering with country and gender for the between-groups components (as ex-pected), but not for the within-group terms (also as expected). Clustering of component scores for single-level PCA was harder to resolve. In conclusion, mPCA is viable method of forming shape models that offers distinct advantages over single-level PCA when groups occur naturally in the subject population
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