147,697 research outputs found
PEMETAAN FAKTOR C YANG DITURUNKAN DARI BERBAGAI INDEKS VEGETASI DATAPENGINDERAAN JAVH SEBAGAI MASVKAN PEMODELAN EROSI DI DAS MERAWU (C Factor Mapping Derived from Various VegetationI"deces of ...
No full textPenelitian ini bertujuan untuk mengkaji berbagai indeks vegetasi yang diturunkan dari data
penginderaanjauh dalampemetaan faktorC sebagaimasukandalam pemodelanerosiUSLE(Universal
Soil Loss Equation).
Metode yang digunakan dalam penelitian ini adalah dengaItmenganalisis data penginderaanjauh
Landsat 7 ETM+sehingga menghasiIkan berbagai i,ndeksvegetasi yang kemudian dilakukan analisis
korelasi dengan Faktor C yang diukur di lapangah pada 45 lokasi. Dari analisis ini diperoleh suatu
model untuk pemetaan faktor C (C model )dari berbagai indeks vegetasi. Peta faktor C yang diperoleh
kemudian dilakukan validasi pada 48 lokasi sehingga akan diketahui keakuratan hasil pemodelan.
Dalam penelitian ini dikaji I I (sebelas) indeks vegetasi yang diturunkan dari data penginderaanjauh,
yaitu ARVI, MSAVI,TVI, VIF, NDVI, TSAVI, SAVI,EVI, RVI, DVI dan PVI.
Hasil penelitian menunjukkan bahwa dari I I indeks vegetasi yang dikaji terdapat 8 indeks
vegetasi yang menghasilkan peta faktor C dengan ketelitian yang tinggi, yaitu MSAVI, TVI,
VIF, NDVI, TSAVI, SAVI, EVI dan RVI. Indeks vegetasi yang menggunakan rumus yang lebih
kompleks menghasilkan koefisien korelasi yang lebih tinggi dibanding dengan indeks vegetasi yang
menggunakan rumus yang sederhana. Indeks vegetasi yang mempertimbangkan latar belakang tanah
(MSAVI dan TSAVI) mempunyai koefisien korelasi lebih tinggi dibanding dengan koefisien korelasi
yang tidak mempertimbangkan latar belakang tanah
Mellin-Transform-Based Performance Analysis of FFH -ary FSK Using Product Combining for Combatting Partial-Band Noise Jamming
No full textOn super form factors of half-BPS operators in N=4 super Yang-Mills
Full text linkOpen Access, (c) The Authors. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited
Abstraction Refinement Guided by a Learnt Probabilistic Model
Full text linkThe core challenge in designing an effective static program analysis is to find a good program abstraction -- one that retains only details relevant to a given query. In this paper, we present a new approach for automatically finding such an abstraction. Our approach uses a pessimistic strategy, which can optionally use guidance from a probabilistic model. Our approach applies to parametric static analyses implemented in Datalog, and is based on counterexample-guided abstraction refinement. For each untried abstraction, our probabilistic model provides a probability of success, while the size of the abstraction provides an estimate of its cost in terms of analysis time. Combining these two metrics, probability and cost, our refinement algorithm picks an optimal abstraction. Our probabilistic model is a variant of the Erdos-Renyi random graph model, and it is tunable by what we call hyperparameters. We present a method to learn good values for these hyperparameters, by observing past runs of the analysis on an existing codebase. We evaluate our approach on an object sensitive pointer analysis for Java programs, with two client analyses (PolySite and Downcast)
Quench characteristics of a Cu-Stabilized 2G HTS conductor
No full textThe prospect of medium/high field superconducting magnets using 2G HTS tapes is approaching to reality with continued enhancement in the performance of these conductors. Direct measurements of 1d adiabatic quench initiation and propagation of a Cu-stabilized 2G conductor have been carried out with spatial-temporal recording of temperature and voltage following the deposition of various local heat pulses to the conductor at different temperatures between 40K and 64K carrying different transport currents. It was found that the stabilizer-free 2G tape maintains the unique characteristics previously measured in non-stabilized tape of increasing MPZ with transport current and higher quench energy at lower temperatures. The minimum quench energy, minimum propagation zone (MPZ) length are determined as a function of temperature and transport current. The change in MPZ size is investigated with measured temperature dependent E-J characteristics. The results add more detail to help understand the unique characteristics of increasing MPZ with transport current and lower temperatures
Yang-Baxter maps and the discrete KP hierarchy
Full text linkWe present a systematic construction of the discrete KP hierarchy in terms of Sato–Wilson-type shift operators. Reductions of the equations in this hierarchy to 1+1-dimensional integrable lattice systems are considered, and the problems that arise with regard to the symmetry algebra underlying the reduced systems as well as the ultradiscretizability of these systems are discussed. A scheme for constructing ultradiscretizable reductions that give rise to Yang–Baxter maps is explained in two explicit examples
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Species composition and vegetation pattern of a lowland rain forest at the Nanjenshan LTER site, southern Taiwan
No full text
DC- and pulse electroresistive effects in mixed manganites-a new view
No full textA new concept is introduced which can develop interface electroresistive (ER-) and pulse electro-resistive (EPIR-) effects far from phase transition temperatures and phase separation regions. It is based on strong self-trapping effects in mixed manganites, but this self-trapping is rather connected with larger defect trap states, not just with trapped electrons or holes. Due to a peculiar electrical field induced feedback, this self-trapping does not occur at random, but rather tends to build up space charge accumulation layers which are not at equilibrium with the matrix free carriers. (C) 2013 Elsevier B.V. All rights reserved
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