1,505 research outputs found
Modeling Land-Cover Types Using Multiple Endmember Spectral Mixture Analysis in a Desert City
Spectral mixture analysis is probably the most commonly used approach among sub-pixel analysis techniques. This method models pixel spectra as a linear combination of spectral signatures from two or more ground components. However, spectral mixture analysis does not account for the absence of one of the surface features or spectral variation within pure materials since it utilizes an invariable set of surface features. Multiple endmember spectral mixture analysis (MESMA), which addresses these issues by allowing endmembers to vary on a per pixel basis, was employed in this study to model Landsat ETM+ reflectance in the Phoenix metropolitan area. Image endmember spectra of vegetation, soils, and impervious surfaces were collected with the use of a fine resolution Quickbird image and the pixel purity index. This study employed 204 (=3x17x4) total four-endmember models for the urban subset and 96 (=6x6x2x4) total five-endmember models for the non-urban subset to identify fractions of soil, impervious surface, vegetation, and shade. The Pearson correlation between the fraction outputs from MESMA and reference data from Quickbird 60 cm resolution data for soil, impervious, and vegetation were 0.8030, 0.8632, and 0.8496 respectively. Results from this study suggest that the MESMA approach is effective in mapping urban land covers in desert cities at sub- pixel level.
Full-Coupled Channel Approach to Doubly Strange -Shell Hypernuclei
We describe {\it ab initio} calculations of doubly strange, , -shell
hypernuclei (H, H,
He and He) as a first attempt to
explore the few-body problem of the {\it full}-coupled channel scheme for these
systems. The wave function includes , ,
and channels. Minnesota , D2 , and
simulated potentials based on the Nijmegen hard-core model, are used.
Bound state solutions of these systems are obtained. We find that a set of
phenomenological interactions among the octet baryons in and
-2 sectors, which is consistent with all of the available experimental binding
energies of and -2 -shell (hyper-)nuclei, can predict a particle
stable bound state of H.
For H and He,
and potentials enhance the net
coupling, and a large probability is obtained even for a weaker
potential.Comment: 4 pages, 1 figur
Prognostic value of troponins in acute coronary syndrome depends upon patient age
Peer reviewedPostprin
Examining the Product Quality Attributes that influences customer satisfaction most when the price was discounted: A case study in Kuching Sarawak
The study is about customer satisfaction towards the product quality. The effect of low pricing product with the product quality plays the same result of low price products produces low quality product and vice-versa. Data instrument that is used in obtaining data is by distributing survey questionnaire. The main purpose of this research is to classify whether the eight dimension of product quality after price discounting is satisfying towards customer. The respondent of the research was chosen through sampling method by using the non-probability sampling. The results infer that that the customer’s satisfaction towards the discounted product quality is based on the three attributes most namely perceived quality, performance and reliability. The Perceived quality- on image, brand name, and advertising is positively related to the level of satisfaction towards the quality of discounted product; were all supported as the relationships between the variables were statistically significant. This study does also provide useful guidelines for future researcher to be more rigorous and also in-depth to empirical and theoretical processes. In future study, customer satisfaction towards discounted product quality of the product to be specified to a product only determine by one gender (female) and also a perception towards a certain discounted price level of a product and its quality with extension of product design and customer requirements
Lambda Lambda-XiN Coupling Effects in Light Hypernuclei
The significance of -N coupling in double-
hypernuclei has been studied. The Pauli suppression effect due to this coupling
in He has been found to be 0.43 MeV for the coupling
strength of the NSC97e potential. This indicates that the free-space
interaction is stronger by about phase shift than
that deduced from the empirical data of He without
including the Pauli suppression effect. In He and
H, an attractive term arising from -N
conversion is enhanced by the formation of an alpha particle in intermediate
states. According to this enhancement, we have found that the
binding energy () of
He is about 0.27 MeV larger than that of
He for the NSC97e coupling strength. This finding deviates
from a general picture that the heavier is the core nucleus, the larger is
.Comment: 16 pages with 2 figure
-- coupling in He with the Nijmegen soft-core potentials
The -- coupling in
He is studied with the [ + +
] + [ + + ] + [ + + ] model,
where the particle is assumed as a frozen core. We use the Nijmegen
soft-core potentials, NSC97e and NSC97f, for the valence baryon-baryon part,
and the phenomenological potentials for the parts (=,
, and ). We find that the calculated of He for NSC97e and NSC97f are,
respectively, 0.6 and 0.4 MeV in the full coupled-channel calculation, the
results of which are about half in comparison with the experimental data,
MeV.
Characteristics of the sector in the NSC97 potentials are discussed in
detail.Comment: 18 pages, 4 figure
An Econometric Analysis on the Co-Movement of Stock Market Volatility between China and ASEAN-5
This study aims to examine the co-movement of stock market volatility between China and ASEAN-5 countries from the year 2000 to 2009. This study applies the standard linear GARCH (1, 1) model where these models estimate using monthly price data from year 2000 to 2009 for China, Malaysia, Singapore, Thailand, Indonesia and Philippines. The standard time series econometrics analysis is used which are ADF unit root test, JJ co-integration test, and Granger causality test. The results indicate the co movement of stock market volatility between China and ASEAN-5 have fairly relation among them. The result shows there are two way relations which are bidirectional causality between china and Indonesia; China and Thailand; and China and Singapore. Meanwhile, there have no causality relation between China and Malaysia; and also China and Philippines. Though, it can be concluded that there are relationship between regions in the stock market volatility
Stochastic Variational Search for H
A four-body calculation of the bound state, $^{\
4}_{\Lambda\Lambda}NN\Lambda N\Lambda\Lambda\Lambda\Lambda_\Lambda^3{H}+\Lambda\Lambda\LambdaB_{\Lambda\Lambda}(^{6}_{\Lambda\Lambda}{He})d\Lambda\Lambda$ model in the Letter.Comment: Corrected typos, added addtional calculations regarding a truncated
to l=0 interaction model, 4 pages, 3 figure
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