Utility of Landsat Image in the Study of Land Cover and Land Surface Temperature Change

AbstractScientists have aimed at exploring land use and land cover (LULC) and their environmental influence in order to improve our understanding of the causes and consequences of these phenomena. This study addresses and use and land cover change (LUCC) in the upper reaches of Pearl River Delta, China, from 1990 to 2008. Based on remotely sensed images of Landsat, LUCC and land surface temperature were assessed. Results showed that land surface temperature was highly influenced by the LUCC from 1990 to 2008. An examination of the relationship between the LULC and LST maps was finally conducted to comprehension their interactions. Results indicated that Landsat image was effective for quantifying the heat environment and providing reliable measurements of land use change. LST was found to be positively correlated with impervious surface but negatively correlated with vegetated land. Each temperature zone was associated with a dominant LULC category

The first record of \u3cem\u3eScorpiops bhutanensis\u3c/em\u3e Tikader & Bastawade, 1983 from China, with the first report of its female (Scorpiones: Scorpiopidae)

The first record of Scorpiops bhutanensis Tikader & Bastawade, 1983 from China (Xizang). An emended diagnosis, detailed redescription, and illustrations of the species are provided. Its female is reported here for the first time

Ginzburg-Landau-type theory of non-polarized spin superconductivity

Since the concept of spin superconductor was proposed, all the related studies concentrate on spin-polarized case. Here, we generalize the study to spin-non-polarized case. The free energy of non-polarized spin superconductor is obtained, and the Ginzburg-Landau-type equations are derived by using the variational method. These Ginzburg-Landau-type equations can be reduced to the spin-polarized case when the spin direction is fixed. Moreover, the expressions of super linear and angular spin currents inside the superconductor are derived. We demonstrate that the electric field induced by super spin current is equal to the one induced by equivalent charge obtained from the second Ginzburg-Landau-type equation, which shows self-consistency of our theory. By applying these Ginzburg-Landau-type equations, the effect of electric field on the superconductor is also studied. These results will help us get a better understanding of the spin superconductor and the related topics such as Bose-Einstein condensate of magnons and spin superfluidity.Comment: 9 pages, 5 figure

Multiple positive solutions for second order impulsive boundary value problems in Banach spaces

By means of the fixed point index theory of strict set contraction operators, we establish new existence theorems on multiple positive solutions to a boundary value problem for second-order impulsive integro-differential equations with integral boundary conditions in a Banach space. Moreover, an application is given to illustrate the main result

Symplectic self-orthogonal quasi-cyclic codes

In this paper, we obtain sufficient and necessary conditions for quasi-cyclic codes with index even to be symplectic self-orthogonal. Then, we propose a method for constructing symplectic self-orthogonal quasi-cyclic codes, which allows arbitrary polynomials that coprime $x^{n}-1$ to construct symplectic self-orthogonal codes. Moreover, by decomposing the space of quasi-cyclic codes, we provide lower and upper bounds on the minimum symplectic distances of a class of 1-generator quasi-cyclic codes and their symplectic dual codes. Finally, we construct many binary symplectic self-orthogonal codes with excellent parameters, corresponding to 117 record-breaking quantum codes, improving Grassl's table (Bounds on the Minimum Distance of Quantum Codes. http://www.codetables.de)

Gamellia sinensis O.Ktze extract shows anti-colorectal cancer activity via MAPK/ERK signaling pathway

Purpose: To investigate the therapeutic effects of Gamellia sinensis O.Ktze extract (GSOE) on colorectal cancers, as well as the underlying mechanisms.Methods: The effect of GSOE on colorectal cancer cells HCT-116 or Caco-2 growth was tested, and then the apoptosis and invasion was analyzed by MTT, flow cytometry and Transwell assay in vitro. Next, the mice received three doses (200, 400 or 800 mg/kg/day, gastric perfusion) of GSOE to evaluate its effects on tumor growth. Lung metastasis in mouse xenograft models which were inoculated with HCT-116 or Caco-2 cells were also investigated. The expression of p-ERK and  p-MEK were evaluated by western blot analysis in HCT-116 and Caco-2 cells with or without GSOE treatment in vitro.Result: GSOE significantly inhibited colorectal cancer cell growth and induced  apoptosis or cell cycle arrest at G1- and S-phases in HCT-116 cells and Caco-2 cells in a dose-dependent manner. Moreover, GSOE effectively retarded tumor cell migration and invasion through ERK/MAPK signaling pathway suppression.Conclusion: These findings demonstrate that GSOE has an anti-tumor effect in colorectal cancer by inactivating ERK/MAPK signaling pathway.Keywords: Gamellia sinensis O.Ktze, Colorectal cancer, Invasion, Apoptosis, Cell cycle arrest ERK, MAPK