Optimalisasi Performansi Link Transmisi Area Batam

Performansi jaringan dan trasmisi harus mendapatkan perhatian khusus karena seberapa besar kepuasan pelanggan terhadap kualitas sinyal yang diperoleh tergantung pada performansi yang baik dari keduanya. Namun keduanya sangat rentan terhadap kegagalan atau kerusakan yang diakibatkan oleh keadaan lingkungan yang berubah-ubah yang dapat menurunkan kualitas sinyal dalam suatu jaringan, pemeliharaan perangkat yang kurang terpantau, tidak rapinya mobilitas pengaturan jaringan telekomunikasi dan lain-lain.Dengan mengoptimalkan performansi jaringan dan transmisi pada suatu daerah yang dirasa paling banyak kebutuhan pelayanan jasa telekomunikasi akan dapat mengurangi faktor penurunan kualitas sinyal dalam suatu jaringan. Untuk optimalisasi performansi link transmisi pada penelitian ini memanfaatkan teori topologi jaringan dan transformasi teknologi dari PDH ke SDH berdasarkan efisiensi pemakaian pada jaringan

Constituents of talisia nervosa with potential utility against metabolic syndrome

© 2019, The Author(s). As coral cover has declined on Caribbean reefs, space has become occupied by other benthic taxa, including sponges, which may affect the recruitment of new corals, thereby affecting the ability of reefs to recover to coral-dominated states. Sponges may inhibit coral recruitment by pre-empting potential recruitment space, overgrowing recruits, or through allelopathy. This study examined coral recruitment across six coral reef sites surrounding St. Thomas, US Virgin Islands, and the impact of one species of sponge and the sponge community as a whole on coral recruitment. To test the effect of a single species of sponge on coral recruitment, fragments of living or non-living Aplysina cauliformis were attached to terracotta recruitment tiles and deployed at all six sites, along with unoccupied tiles as controls. At two of the sites, a community-level experiment consisted of deploying recruitment tiles in 1 m2 plots that were either cleared of the entire sponge community or control plots where no sponges were removed. Recruitment rates showed a consistent difference among sites over multiple years and experiments. Results of the species-specific experiment showed that the proximity of live or dead A. cauliformis did not affect coral recruitment. However, results of the community-level experiment found greater coral recruitment rates in plots cleared of sponges, suggesting that the presence of the sponge community negatively affected coral recruitment. This study is one of the first to experimentally test and find a significant impact of sponges on coral recruitment, and highlights the need for additional research in this area

OPTIMALISASI PERFORMANSI LINK TRANSMISI AREA BATAM

Performansi jaringan dan trasmisi harus mendapatkan perhatian khusus karena seberapa besar kepuasan pelanggan terhadap kualitas sinyal yang diperoleh tergantung pada performansi yang baik dari keduanya. Namun keduanya sangat rentan terhadap kegagalan atau kerusakan yang diakibatkan oleh keadaan lingkungan yang berubah-ubah yang dapat menurunkan kualitas sinyal dalam suatu jaringan, pemeliharaan perangkat yang kurang terpantau, tidak rapinya mobilitas pengaturan jaringan telekomunikasi dan lain-lain.Dengan mengoptimalkan performansi jaringan dan transmisi pada suatu daerah yang dirasa paling banyak kebutuhan pelayanan jasa telekomunikasi akan dapat mengurangi faktor penurunan kualitas sinyal dalam suatu jaringan. Untuk optimalisasi performansi link transmisi pada penelitian ini memanfaatkan teori topologi jaringan dan transformasi teknologi dari PDH ke SDH berdasarkan efisiensi pemakaian pada jaringan

Build orientation optimization problem in additive manufacturing

Additive manufacturing (AM) is an emerging type of production technology to create three-dimensional objects layer-by-layer directly from a 3D CAD model. AM is being extensively used by engineers and designers. Build orientation is a critical issue in AM since it is associated with the object accuracy, the number of supports required and the processing time to produce the object. Finding the best build orientation in the AM will reduced significantly the building costs and will improve the object accuracy. This paper presents an optimization approach to solve the part build orientation problem considering the staircase effect, support area characteristics and the build time. Two global optimization methods, the Electromagnetism-like and the Stretched Simulated Annealing algorithms, are used to study the optimal orientation of four models. Preliminary experiments show that both optimization methods can effectively solve the build orientation problem in AM, finding several global solutions.This work has been supported and developed under the FIBR3D project - Hybrid processes based on additive manufacturing of composites with long or short fibers reinforced thermoplastic matrix (POCI-01-0145-FEDER-016414), supported by the Lisbon Regional Operational Programme 2020, under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (ERDF). This work was also supported by COMPETE: POCI-01-0145-FEDER-007043 and FCT - Fundação para a Ciência e Tecnologia within the Project Scope: UID/CEC/00319/2013.info:eu-repo/semantics/publishedVersio

Systematic study of the effect of short range correlations on the form factors and densities of s-p and s-d shell nuclei

Analytical expressions of the one- and two-body terms in the cluster expansion of the charge form factors and densities of the s-p and s-d shell nuclei with N=Z are derived. They depend on the harmonic oscillator parameter b and the parameter $\beta$ which originates from the Jastrow correlation function. These expressions are used for the systematic study of the effect of short range correlations on the form factors and densities and of the mass dependence of the parameters b and $\beta$. These parameters have been determined by fit to the experimental charge form factors. The inclusion of the correlations reproduces the experimental charge form factors at the high momentum transfers ($q\geq 2 1/fm$). It is found that while the parameter $\beta$ is almost constant for the closed shell nuclei, $^4$He, $^{16}$O and $^{40}$Ca, its values are larger (less correlated systems) for the open shell nuclei, indicating a shell effect in the closed shell nuclei.Comment: Latex, 21 pages, 6 figures, 1 tabl

Observation of Top Quark Production in Proton-Nucleus Collisions

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