6,161 research outputs found

    Aplikasi Pengelolaan Data Praktikum Laboratorium Komputer STMIK Widya Cipta Dharma Berbasis Intranet

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    UPT. Laboratorium komputer STMIK Widya Cipta Dharma merupakan sebuah unit kerja yang memberikan pelayanan akademik. Laboratorium Komputer mempunyai fungsi sebagai tempat proses pembelajaran. Dalam kegiatan praktikum pada laboratorium komputer mahasiswa menggunakan komputer tetap dalam praktikum mata kuliah tersebut karena data-data praktikum hanya ada pada komputer tersebut tanpa mempunyai penyimpanan data yang baik. Apabila mahasiswa maupun dosen ingin meminta data-data tersebut meraka harus menghubungi admin laboratorium tersebut mendapatkan data-data praktikum tersebut lalu membuka komputer mahasiswa tersebut untuk disalin data-datanya. Hal ini tidak efisien dalam melakukan pertukaran data ditambah komputer digunakan oleh banyak mahasiswa membuat data -data praktikum menumpuk dan dapat tercampur dengan data mahasiswa lain. Penelitian ini dibuat untuk mengatasi berbagai kendala yang dihadapi oleh Laboratorium Komputer STMIK WICIDA. Dalam membangun aplikasi ini menggunakan metode pengembangan sistem waterfall, metode pengujian blackbox dan pengujian beta, database MYSQL dan menggunakan bahasa pemrograman PHP (PHP Hypertext Preprocessor), dreamweaver sebagai webeditor, apache sebagai webserver local, flowchart, Data Flow Diagram dan Entity Relationship Diagram sebagai alat bantu perancangan sistem. Dengan adanya aplikasi pengelolaan data praktikum berbasis intranet ini diharapkan dapat membantu laboratorium komputer STMIK WICIDA dan memberikan kemudahan dalam pengelolaan data praktikum

    Information requirements for supersonic transport operation Final report

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    Effects of meteorological parameters and instrument errors on vertical flight performance of supersonic transport

    Combining social network analysis and the NATO Approach Space to define agility. Topic 2: networks and networking

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    This paper takes the NATO SAS-050 Approach Space, a widely accepted model of command and control, and gives each of its primary axes a quantitative measure using social network analysis. This means that the actual point in the approach space adopted by real-life command and control organizations can be plotted along with the way in which that point varies over time and function. Part 1 of the paper presents the rationale behind this innovation and how it was subject to verification using theoretical data. Part 2 shows how the enhanced approach space was put to use in the context of a large scale military command post exercise. Agility is represented by the number of distinct areas in the approach space that the organization was able to occupy and there was a marked disparity between where the organization thought it should be and where it actually was, furthermore, agility varied across function. The humans in this particular scenario bestowed upon the organization the levels of agility that were observed, thus the findings are properly considered from a socio-technical perspective

    Slow flows of an relativistic perfect fluid in a static gravitational field

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    Relativistic hydrodynamics of an isentropic fluid in a gravitational field is considered as the particular example from the family of Lagrangian hydrodynamic-type systems which possess an infinite set of integrals of motion due to the symmetry of Lagrangian with respect to relabeling of fluid particle labels. Flows with fixed topology of the vorticity are investigated in quasi-static regime, when deviations of the space-time metric and the density of fluid from the corresponding equilibrium configuration are negligibly small. On the base of the variational principle for frozen-in vortex lines dynamics, the equation of motion for a thin relativistic vortex filament is derived in the local induction approximation.Comment: 4 pages, revtex, no figur

    Velocity profiles in shear-banding wormlike micelles

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    Using Dynamic Light Scattering in heterodyne mode, we measure velocity profiles in a much studied system of wormlike micelles (CPCl/NaSal) known to exhibit both shear-banding and stress plateau behavior. Our data provide evidence for the simplest shear-banding scenario, according to which the effective viscosity drop in the system is due to the nucleation and growth of a highly sheared band in the gap, whose thickness linearly increases with the imposed shear rate. We discuss various details of the velocity profiles in all the regions of the flow curve and emphasize on the complex, non-Newtonian nature of the flow in the highly sheared band.Comment: 4 pages, 5 figures, submitted to Phys. Rev. Let

    Trust in vehicle technology

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    Driver trust has potentially important implications for how vehicle technology is used and interacted with. In this paper, it will be seen how driver trust functions and how it can be understood and manipulated by insightful vehicle design. It will review the theoretical literature to define steps that can be taken to establish trust in vehicle technology in the first place, maintain trust in the long term, and even re-establish trust that has been lost along the way. The paper presents a synthesis of the wider trust literature, integrates key trust parameters, describes practically how to measure trust, and presents a set of principles for vehicle designers to use in assessing existing design decisions and justify new ones

    On the evolution of credibility and flexible exchange rate target zones

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    This paper considers the optimal management of exchange rate target zones by regarding the operation of a target zone as a dynamic signalling game between the monetary authorities and the financial markets. A Sequential Open Loop (Feedback) policy of sterilised intervention is proposed that depends critically on the evolution of the policy maker’s credibility as opposed to the open loop precommitment strategy that has been implemented, for instance, in the Exchange Rate Mechanism of the EMS and in the Bretton Woods system. The width of the target zone and re-alignments are in turn determined optimally given the policy maker’s credibility. This flexible target zone proposal is shown through simulation to stabilize the exchange rate to a substantial degree while retaining considerable flexibility and robustness in response to shocks

    Velocity Profiles in Slowly Sheared Bubble Rafts

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    Measurements of average velocity profiles in a bubble raft subjected to slow, steady-shear demonstrate the coexistence between a flowing state and a jammed state similar to that observed for three-dimensional foams and emulsions [Coussot {\it et al,}, Phys. Rev. Lett. {\bf 88}, 218301 (2002)]. For sufficiently slow shear, the flow is generated by nonlinear topological rearrangements. We report on the connection between this short-time motion of the bubbles and the long-time averages. We find that velocity profiles for individual rearrangement events fluctuate, but a smooth, average velocity is reached after averaging over only a relatively few events.Comment: typos corrected, figures revised for clarit

    Upper ocean mixing controls the seasonality of planktonic foraminifer fluxes and associated strength of the carbonate pump in the oligotrophic North Atlantic

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    Oligotrophic regions represent up to 75% of Earth's open-ocean environments. They are thus areas of major importance in understanding the plankton community dynamics and biogeochemical fluxes. Here we present fluxes of total planktonic foraminifera and 11 planktonic foraminifer species measured at the Oceanic Flux Program (OFP) time series site in the oligotrophic Sargasso Sea, subtropical western North Atlantic Ocean. Foraminifera flux was measured at 1500 m water depth, over two ~ 2.5-year intervals: 1998–2000 and 2007–2010. We find that foraminifera flux was closely correlated with total mass flux, carbonate and organic carbon fluxes. We show that the planktonic foraminifera flux increases approximately 5-fold during the winter–spring, contributing up to ~ 40% of the total carbonate flux. This was primarily driven by increased fluxes of deeper-dwelling globorotaliid species, which contributed up to 90% of the foraminiferal-derived carbonate during late winter–early spring. Interannual variability in total foraminifera flux, and in particular fluxes of the deep-dwelling species (Globorotalia truncatulinoides, Globorotalia hirsuta and Globorotalia inflata), was related to differences in seasonal mixed layer dynamics affecting the strength of the spring phytoplankton bloom and export flux, and by the passage of mesoscale eddies. As these heavily calcified, dense carbonate tests of deeper-dwelling species (3 times denser than surface dwellers) have greater sinking rates, this implies a high seasonality of the biological carbonate pump in oligotrophic oceanic regions. Our data suggest that climate cycles, such as the North Atlantic Oscillation, which modulates nutrient supply into the euphotic zone and the strength of the spring bloom, may also in turn modulate the production and flux of these heavily calcified deep-dwelling foraminifera by increasing their food supply, thereby intensifying the biological carbonate pump
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