Penelitian Awal Penempatan Turbin Pembangkit Listrik Tenaga Arus Laut (Pltal) Dari Data Arus Dan Morfologi Dasar Laut Di Selat Boleng, Nusa Tenggara Timur

Distribusi kecepatan arus di Selat Boleng sangat dipengaruhi oleh kondisi pasang surut, kedalaman dan bentukan morfologi dasar lautnya. Kecepatan arus bergradasi naik dari dangkal ke kedalaman yang lebih dalam. Dibagian selatan dan tengah selat distribusi kecepatan arus maksimum pada kedalaman laut antara 20 – 50 m, 50 – 100 m dan 100 – 180 m, masing-masing antara 0.5 – 2.0 m/det, 2.1 – 3.0 m/det dan di atas 3.0 m/det. Kecepatan arus maksimum terjadi pada saat kedudukan air pasang menuju pasang maksimum dan kedudukan air pada saat surut menuju surut minimum. Berdasarkan kedalaman laut, bentuk morfologi dasar laut dan distribusi kecepatan arus vertikal dan horizontalnya, maka lokasi penempatan turbin representatif adalah pada kedalaman 75 – 100 m yang terletak di sisi barat bagian selatan (area 1) dan tengah selat (area 2). Sedangkan di bagian utara selat (area 3) pada kedalaman 50 – 100 m. Kecepatan arus di lokasi ini pada saat pasang surut berkisar antara 1.5 – 3.1 m/dtk. Dari ketiga area ini paling representatif adalah area 2 dengan tipe turbin sistem pemberat (gravity base) dan turbin terapung. Kata kunci : pasang surut, kedalaman laut, morfologi dasar laut, kecepatan arus, lokasi turbin, Selat Boleng Current velocity distribution in the Strait of Boleng strongly influenced by tidal conditions, the depth of the sea and seabed morphology formation. Graded current velocity increased from shallow to deeper depths. In the southern and central strait at ocean depths between 20-50 m maximum current velocity distribution ranged from 0.5 - 2.0 m/s, depths 50-100 m maximum current velocity distribution ranged from 2.1 - 3.0 m/s and a depth of 100-180 m maximum current velocity distribution above 3.0 m/s. The maximum current velocity occurs when position of the flood toward the maximum flood and position of the ebb toward the minimum ebb. Based on the depth sea, seabed morphology and distribution of vertical and horizontal current velocity, the location of the turbine placement representative is on the west side of the strait at a depth 75-100 m, located in the southern part of the strait (area 1) and the middle of the strait (area 2). While in the northern part of the strait (area 3) at a depth of 50-100 m. Current velocity at the site in tidal conditions ranged from 1.5 - 3.1 m/sec. Of the three areas, the most representative area is the area 2 with a suitable turbine type is the type turbine with a ballast system (gravity base) and floating turbines. Keywords: tidal, depth sea, strait, current velocity, seabed morphology, turbine location, Boleng Strai

The homotopy type of the loops on (n−1)(n-1)-connected (2n+1)(2n+1)-manifolds

For $n\geq 2$ we compute the homotopy groups of $(n-1)$-connected closed manifolds of dimension $(2n+1)$. Away from the finite set of primes dividing the order of the torsion subgroup in homology, the $p$-local homotopy groups of $M$ are determined by the rank of the free Abelian part of the homology. Moreover, we show that these $p$-local homotopy groups can be expressed as a direct sum of $p$-local homotopy groups of spheres. The integral homotopy type of the loop space is also computed and shown to depend only on the rank of the free Abelian part and the torsion subgroup.Comment: Trends in Algebraic Topology and Related Topics, Trends Math., Birkhauser/Springer, 2018. arXiv admin note: text overlap with arXiv:1510.0519

Scaling in the Bombay Stock Exchange Index

In this paper we study BSE Index financial time series for fractal and multifractal behaviour. We show that Bombay stock Exchange (BSE)Index time series is mono-fractal and can be represented by a fractional Brownian motion.Comment: 11 pages,3 figure

Curling: Content-ubiquitous resolution and delivery infrastructure for next-generation services

CURLING, a Content-Ubiquitous Resolution and Delivery Infrastructure for Next Generation Services, aims to enable a future content-centric Internet that will overcome the current intrinsic constraints by efficiently diffusing media content of massive scale. It entails a holistic approach, supporting content manipulation capabilities that encompass the entire content life cycle, from content publication to content resolution and, finally, to content delivery. CURLING provides to both content providers and customers high flexibility in expressing their location preferences when publishing and requesting content, respectively, thanks to the proposed scoping and filtering functions. Content manipulation operations can be driven by a variety of factors, including business relationships between ISPs, local ISP policies, and specific content provider and customer preferences. Content resolution is also natively coupled with optimized content routing techniques that enable efficient unicast and multicast-based content delivery across the global Internet

Dynamic correlations in an ordered c(2×\times2) lattice gas

We obtain the dynamic correlation function of two-dimensional lattice gas with nearest-neighbor repulsion in ordered c(2$\times$2) phase (antiferromagnetic ordering) under the condition of low concentration of structural defects. It is shown that displacements of defects of the ordered state are responsible for the particle number fluctuations in the probe area. The corresponding set of kinetic equations is derived and solved in linear approximation on the defect concentration. Three types of strongly correlated complex jumps are considered and their contribution to fluctuations is analysed. These are jumps of excess particles, vacancies and flip-flop jumps. The kinetic approach is more general than the one based on diffusion-like equations used in our previous papers. Thus, it becomes possible to adequately describe correlations of fluctuations at small times, where our previous theory fails to give correct results. Our new analytical results for fluctuations of particle number in the probe area agree well with those obtained by Monte Carlo simulations.Comment: 10 pages, 7 figure

Enhanced transport protocols

The book presents mechanisms, protocols, and system architectures to achieve end-to-end Quality-of-Service (QoS) over heterogeneous wired/wireless networks in the Internet. Particular focus is on measurement techniques, traffic engineering mechanisms and protocols, signalling protocols as well as transport protocol extensions to support fairness and QoS. It shows how those mechanisms and protocols can be combined into a comprehensive end-to-end QoS architecture to support QoS in the Internet over heterogeneous wired/wireless access networks. Finally, techniques for evaluation of QoS mechanisms such as simulation and emulation are presented. The book is aimed at graduate and post-graduate students in Computer Science or Electrical Engineering with focus in data communications and networking as well as for professionals working in this area

The genetic aetiology of cannabis use initiation: a meta-analysis of genome-wide association studies and a SNP-based heritability estimation

While initiation of cannabis use is around 40% heritable, not much is known about the underlying genetic aetiology. Here, we meta-analysed two genome-wide association studies of initiation of cannabis use with >10000 individuals. None of the genetic variants reached genome-wide significance. We also performed a gene-based association test, which also revealed no significant effects of individual genes. Finally, we estimated that only approximately 6% of the variation in cannabis initiation is due to common genetic variants. Future genetic studies using larger sample sizes and different methodologies (including sequencing) might provide more insight in the complex genetic aetiology of cannabis use

Novel loci affecting iron homeostasis and their effects in individuals at risk for hemochromatosis

Variation in body iron is associated with or causes diseases, including anaemia and iron overload. Here, we analyse genetic association data on biochemical markers of iron status from 11 European-population studies, with replication in eight additional cohorts (total up to 48,972 subjects). We find 11 genome-wide-significant (

Novel loci affecting iron homeostasis and their effects in individuals at risk for hemochromatosis.

Variation in body iron is associated with or causes diseases, including anaemia and iron overload. Here, we analyse genetic association data on biochemical markers of iron status from 11 European-population studies, with replication in eight additional cohorts (total up to 48,972 subjects). We find 11 genome-wide-significant (P<5 × 10(-8)) loci, some including known iron-related genes (HFE, SLC40A1, TF, TFR2, TFRC, TMPRSS6) and others novel (ABO, ARNTL, FADS2, NAT2, TEX14). SNPs at ARNTL, TF, and TFR2 affect iron markers in HFE C282Y homozygotes at risk for hemochromatosis. There is substantial overlap between our iron loci and loci affecting erythrocyte and lipid phenotypes. These results will facilitate investigation of the roles of iron in disease