764 research outputs found
ANALISIS KESESUAIAN LAHAN LAHAN UNTUK TANAMAN UBI KAYU (Manihot utilisima L.) DI DESA BUMELA KECAMATAN BILATO
No full textPenelitian ini bertujuan untuk mengevaluasi kesesuaian lahan tanaman Ubi Kayu (Manihot utilisima L) di Desa Bumela, Kecamatan Bilato, dengan fokus pada karakteristik dan kualitas lahan, kelas kesesuaian lahan, serta faktor pembatas dalam pengembangan tanaman Ubi Kayu (Manihot utilisima L). Penelitian dilaksanakan dari bulan Juli hingga Desember 2019, berlokasi di Desa Bumela, Kecamatan Bilato, Kabupaten Gorontalo. Metode matching digunakan untuk memadukan kriteria kesesuaian lahan dengan data kualitas lahan, dengan mempertimbangkan persyaratan tumbuh tanaman untuk mengidentifikasi kelas kesesuaian lahan yang sesuai. Pengolahan data melibatkan analisis karakteristik dan kualitas lahan, evaluasi kesesuaian lahan, identifikasi keunggulan wilayah, dan analisis ekonomi tanaman ubi kayu. Hasil penelitian menunjukkan bahwa di Desa Bumela, Kecamatan Bilato, kelas kesesuaian lahan yang potensial untuk tanaman ubi kayu (Manihot utilisima L) adalah kelas cukup sesuai (S2) dengan luas 80.568 ha atau 61,46%, sesuai marginal (S3) dengan luas 70,63 ha atau 0,53%, dan tidak sesuai (N) dengan luas 30.056 ha atau 22,92%. Kesesuaian lahan ini dipengaruhi oleh faktor pembatas seperti retensi hara, bahaya erosi, lereng, dan media perakaran. Dari hasil analisis keunggulan wilayah Kecamatan Bilato, terdapat dua komoditas unggulan, yaitu jagung dan ubi kayu. Selain itu, analisis ekonomi tanaman ubi kayu menunjukkan nilai R/C ratio yang menguntungkan, yaitu sebesar Rp. 1,23. Kata Kunci: Kesesuaian Lahan, Ubi Kay
Fullwave coupling to a 3D antenna code using Green's function formulation of wave-particle response
No full textTOPLHA : an accurate and efficient numerical tool for analysis and design of LH antennas
No full textAuxiliary ICRF heating systems in tokamaks often involve large complex antennas, made up of several conducting straps hosted in distinct cavities that open towards the plasma. The same holds especially true in the LH regime, wherein the antennas are comprised of arrays of many phased waveguides. Upon observing that the various cavities or waveguides couple to each other only through the EM fields existing over the plasma-facing apertures, we self-consistently formulated the EM problem by a convenient set of multiple coupled integral equations. Subsequent application of the Method of Moments yields a highly sparse algebraic system; therefore formal inversion of the system matrix happens to be not so memory demanding, despite the number of unknowns may be quite large (typically 105 or so). The overall strategy has been implemented in an enhanced version of TOPICA (Torino Polytechnic Ion Cyclotron Antenna) and in a newly developed code named TOPLHA (Torino Polytechnic Lower Hybrid Antenna). Both are simulation and prediction tools for plasma facing antennas that incorporate commercial-grade 3D graphic interfaces along with an accurate description of the plasma. In this work we present the new proposed formulation along with examples of application to real life large LH antenna systems
Analysis of the corrosive effects of hydrochloric acid (HCl) on human bone: Preliminary microscopic study and observations for forensic purposes
No full textThe destruction of a corpse in caustic acid can cause complex forensic scenarios to deal with. Furthermore, the literature on the subject is poor, having been the few studies carried out only on animal bones. We carried out an experimental analysis on human cranial, ribs, vertebrae, and femur bone fragments. These samples were sent for dissolution by hydrochloric acid (HCl) at two different concentrations in the lab: 10% and 37%. We have performed macroscopic and microscopic histological and cytological observations at set time intervals: 3, 4, 19, 24, 48, and 72 h of immersion in acids. The purpose of the study was threefold: to investigate the temporal evolution of bone dissolution, evaluate the destructive effect of the two hydrochloric acids, and establish whether or not the human pattern of histological structure could be recognized. A more significant destructive action of HCl at 37% has been observed. In the 10% acid, the bone nature of the samples was demonstrable up to 24 h of immersion, but the human pattern of histological structure was already compromised at 19 h, being lost at 24 h. Instead, in the 37% acid, the bone nature of the sample was demonstrable only within 4 h of immersion, and the human pattern of histological structure was markedly compromised within 3 h. At 19 h of immersion, neither the recognition of the bone nor its human nature was feasible. These preliminary findings and observations may be of practical use in forensic investigations of bodies found in acidic substances, for which there is no scientific evidence to refer
Singular Spectrum Analysis as a tool for plasma fluctuations analysis
No full textWe describe the application of the singular spectrum analysis (SSA), an advanced adaptive statistical technique, to denoise experimental signals and to remove trends in order to isolate the relevant fluctuating components. We illustrate a fast denoising algorithm and show its performances relatively to synthetic and experimental signals of the soft x-ray (SXR) spectrometer and the polarimeter installed in the reversed field experiment (RFX) device. As a further application, we report a first estimate of the electron temperature fluctuations in the core of the RFX experiment. They have been performed with a multifilter SXR spectrometer and applying SSA for the first time in plasma physics the singular spectrum analysis. We find that temperature fluctuations are typically not larger than a few percent and are well correlated with magnetic fluctuations. (C) 2001 American Institute of Physics
The impact of the ion-cyclotron-resonance location on the poloidal asymmetries of impurity density in an ICRF-heated rotating plasma
No full textInternational audienceThe recently proposed set of zeroth-order moment equations to model poloidal density asymmetries induced by temperature anisotropies in rotating tokamak plasmas (Bilato et al 2014 Nucl. Fusion 54 072003) is here extended to account for the effects of the localization of the ion-cyclotron (IC) resonance on the poloidal inhomogeneity of the density of the cyclotron-heated ion species. This additional effect has a significant impact on the poloidal density asymmetries due to radio-frequency heating, a key issue for high-Z impurity transport, leading, in particular, to a reduced ICRF heating impact on the in-out accumulation of high-Z impurities when the IC resonance is located on the HFS
Simulation of neutron emission in neutral beam injection heated plasmas with the real-time code RABBIT
No full textIn plasmas heated with deuterium beams a deficit of the expected fusion neutron rate is an indicator of the deterioration of the fast-ion confinement, caused, for instance, by magnetohydrodynamic instabilities. The capability of predicting this deficit during the discharge relies on the availability of real-time estimates of the neutron rate from NBI codes which must be fast and accurate at the same time. Therefore, the recently developed real-time RABBIT code for neutral beam injection (NBI) simulations has been extended to output the distribution function and calculate the neutron emission. After the description of this newly installed diagnostics in RABBIT, benchmarks with NUBEAM, a massively used and validated Monte Carlo NBI solver, are discussed on ASDEX-Upgrade and JET cases. A first application for control-room intershot analysis on DIII-D is presented, and the results are compared on a large database with a slower NUBEAM analysis. Further application possibilities, e.g. for real-time control of Alfvén eigenmodes, are outlined
Declining trends of premature mortality from ischemic heart disease and regional differences in Italy from 2011 to 2017
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