529 research outputs found

    Characterization in bi-parameter space of a non-ideal oscillator

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    The authors thank scientific agencies CAPES, CNPq (112952/2015-1), and FAPESP (2011/ 19269-11). M. S. Baptista also thanks EPSRC (EP/I03 2606/1).Peer reviewedPostprin

    Elastic Constitutive Laws and Stability Analyses

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    In this paper, the influence of several elastic constitutive laws upon the stability analyses of plane trusses is discussed. The chosen laws are connected to the engineering strain, Green’s strain and logarithmic strain concepts. A geometrically exact nonlinear formulation for a truss bar element is developed for each of them and the correspondent tangent stiffness matrices are obtained. The stability analyses of some sample plane trusses are performed by finding the conditions when the determinant of their respective global tangent stiffness matrices is found to be zero. The first example is a symmetric two-bar structure and both limit loads and buckling loads are plotted for the full range of possible initial inclination angles of the bars for the three chosen constitutive laws. A similar truss with an extra vertical bar is studied to discuss possible material instability if Green’s strain concept is adopted

    Analisis Kemampuan Keuangan Daerah Pemerintah Kabupaten Jayapura

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    The purpose of this paper is to analyze and obtain empirical evidence about the financial performance of Jayapura regency government in fiscal year 2010-2014, measured from the level of independence of local, regional dependency rate, the level of fiscal decentralization, the level of effectiveness and efficiency of financial management and fiscal capacity Jayapura regency in fiscal year 2010-2014, measured through share and growth Local Revenue. The results obtained from this study is that the financial capacity of Jayapura regency, measured from the level of the region's autonomy in fiscal year 2010-2014 included in the criteria are lacking, and the level of dependence of the region in that period qualifies as a very high criteria instructive relationship patterns. The ratio of fiscal decentralization is still lacking, the level of effectiveness of regional revenue in 2010-2014 classified in the category of very effective with a ratio of regional revenue collection efficiency is very efficient. The financial capacity of the district of Jayapura in this case the level of independence and dependence of the area and the level of fiscal decentralization is considered good if the government of Jayapura District has been able to raise the percentage of acceptance of regional revenue to be in the top 40% of the fund balance, because then the Local Revenue will contribute greater of the total regional expenditure. Keywords: financial capacity of local, regional autonomy, regional dependence, fiscal decentralization, effectiveness, efficienc

    Design of a millifluidic device for the evaluation of blue-light disinfection on Pseudomonas aeruginosa PA01 biofilm

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    Significance: For the first time to our knowledge, a millifluidic device has been designed to observe the effects of blue-light irradiation in Pseudomonas aeruginosa PA01 bacterial biofilm. Approach: A bacterial biofilm is formed under controlled flow of nutrients in microfabricated channels settled on a microscope stage. The setup is devised to apply defined irradiation and evaluate the photo-killing efficiency in situ using video-microscopy and fluorescent probes. Results: We investigated bacterial survival after delivering a precise, controlled and spatially defined blue light dose upon growing biofilm. We demonstrate in this report that the combined use of constitutive GFP and propidium iodide in a millifluidic setup enables to evidence light-induced mortality at the single cell and community level. Conclusions: Real-time monitoring of a bacterial biofilm growing in a millifluidic device after irradiation opens an avenue for a better understanding of the biofilm community response to blue-light, permitting researchers to approach photokilling efficiency of biofilm as a dynamic process

    A tutorial review on time-frequency analysis of non-stationary vibration signals with nonlinear dynamics applications

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    Time-frequency analysis (TFA) for mechanical vibrations in non-stationary operations is the main subject of this article, concisely written to be an introducing tutorial comparing different time-frequency techniques for non-stationary signals. The theory was carefully exposed and complemented with sample applications on mechanical vibrations and nonlinear dynamics. A particular phenomenon that is also observed in non-stationary systems is the Sommerfeld effect, which occurs due to the interaction between a non-ideal energy source and a mechanical system. An application through TFA for the characterization of the Sommerfeld effect is presented. The techniques presented in this article are applied in synthetic and experimental signals of mechanical systems, but the techniques presented can also be used in the most diverse applications and also in the numerical solution of differential equation

    Analisis Faktor-faktor yang Mempengaruhi Implementasi Anggaran Berbasis Kinerja

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    The purpose of the study was to analyze what factors influence the Performance Based Budget by using a sample of 87 respondents working at the Secretariat of the Papuan People\u27s Representative Council. While the data analysis technique used is the Ordinary least square (OLS) technique. The results of the study are indicated by the calculation of the mean (mean) of 32 item questions and 87 respondents and the result is 137.31. If the value is compared to the criteria that the author has set, then the average value is included in the "Very Good" category. While the results of the partial analysis of organizational commitment (X1) have a significant and positive influence on the performance-based budget of 1,261. Keywords: Performance Based Budge
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