138 research outputs found
Gluino mass limits with sbottom NLSP in coannihilation scenarios
In view of the recent interest in the pMSSM with light third generation
squarks, we consider a hitherto neglected scenario where the lighter bottom
squark () is the next lightest supersymmetric particle (NLSP)
which co-annihilates with the lightest supersymmetric particle (LSP), the dark
matter (DM) candidate. Since the co-annihilation cross section receives
contributions from both electroweak and strong vertices, it is relatively
large. As a result relatively large NLSP-LSP mass difference (25 - 35 GeV) is
consistent with the PLANCK data. This facilitates the LHC signatures of this
scenario. We consider several variants of the sbottom NLSP scenario with and
without light stops and delineate the parameter space allowed by the PLANCK
data. We point out several novel signal (e.g., ) which are not viable in the stop NLSP scenario of DM
production. Finally, we consider gluino () decays in this
scenario and using the current ATLAS data in the jets (with or without
b-tagging) + channel, obtain new limits in the
mass plane. We find that for
upto 500 GeV, 1.1 - 1.2 TeV in
this scenario.Comment: 21 pages, 4 figures, few references added; published in JHE
インド東ガーツ造山帯の地殻深部から浅部の進化過程を説明する年代統合テクトニックモデル
広島大学(Hiroshima University)博士(理学)Doctor of Sciencedoctora
The O-Ring Theory, Geographical Distribution Of Misery And Corruption
The approach in this paper is to explore the relationship between corruption perception index (CPI) and human development index (HDI) in order to determine whether or not poor countries resort to corrupt practices as a way of getting over their level of hopelessness. The results show that corruption poses a problem to all countries and consequently to world economic development
Matching Testing Strategy With Student Personality In A Historically Black University
Most instructors believe that if students know the material that is taught, their knowledge will manifest by successful performance on any type of examination question that instructors devise. The issue that is now evolving is whether or not instructors can alter teaching and testing strategies to bring about an optimal learning environment. More particularly, this study represents an attempt to correlate students’ learning style preferences to performance on four types of examination questions. The results reported in this study shows that intuitive and thinking students do not perform well on open-ended quantitative test. Moreover, intuitive students are not very good when it comes to multiple-choice quantitative test. Finally, feeling, sensing, and thinking students perform better on multiple-choice theory tests. 
MultiViz: A Gephi Plugin for Scalable Visualization of Multi-Layer Networks
The process of visually presenting networks is an effective way to understand
entity relationships within the networks since it reveals the overall structure
and topology of the network. Real networks are extremely difficult to visualize
due to their immense complexity, which includes vast amounts of data, several
types of interactions, various subsystems and several levels of connectivity as
well as changes over time. This paper introduces the "MultiViz Plugin," a
plugin for gephi, an open-source software tool for graph visualization and
modification, in order to to visualize complex networks in a multi-layer
manner. A collection of settings are availabe through the plugin to transform
an existing network into a multi-layered network. The plugin supports several
layout algorithms and lets user to choose which property of the network to be
used as the layer. The goal of the study is to give the user complete control
over how the network is visualized in a multi-layer fashion. We demonstrate the
ability of the plugin to visualize multi-layer data using a real-life complex
multi-layer datasets
Studies on Multifunctional Effect of All-Trans Retinoic Acid (ATRA) on Matrix Metalloproteinase-2 (MMP-2) and Its Regulatory Molecules in Human Breast Cancer Cells (MCF-7)
Background. Vitamin A derivative all-trans retinoic acid (ATRA) is considered as a potent chemotherapeutic drug for its capability of regulating cell growth and differentiation. We studied the effect of ATRA on MMP-2 in MCF-7, human breast cancer cells, and the probable signaling pathways which are affected by ATRA on regulating pro-MMP-2 activity and expression. Methods. Gelatin zymography, RT-PCR, ELISA, Western blot, Immunoprecipitation, and Cell adhesion assay are used. Results. Gelatin zymography showed that ATRA caused a dose-dependent inhibition of pro-MMP-2 activity. ATRA treatment downregulates the expression of MT1-MMP, EMMPRIN, FAK, NF-kB, and p-ERK. However, expression of E-cadherin, RAR, and CRABP increased upon ATRA treatment. Binding of cells to extra cellular matrix (ECM) protein fibronectin reduced significantly after ATRA treatment. Conclusions. The experimental findings clearly showed the inhibition of MMP-2 activity upon ATRA treatment. This inhibitory effect of ATRA on MMP-2 activity in human breast cancer cells (MCF-7) may result due to its inhibitory effect on MT1-MMP, EMMPRIN, and upregulation of TIMP-2. This study is focused on the effect of ATRA on MMP, MMP-integrin-E-cadherin interrelationship, and also the effect of the drug on different signaling molecules which may involve in the progression of malignant tumor development
Microstructural evolution, recovery and recrystallization kinetics of isothermally annealed ultra low carbon steel
The recovery and recrystallization kinetics of 80%cold rolled ultra low carbon steel are investigated during isothermally annealing for temperature ranges 350–640 °C as a function of different annealing time. The recovery is assessed by magnetic coercivity (Hc),while the recrystallization is determined by mechanical hardness.At low temperature (350 to 520 °C) annealing, recovery dominates for long time (∼12 000 s),while the annealing at 550 °C/ 900s and 580 °C/ 300s causes the recrystallized nuclei formation . The recovery kinetics is introduced by differential rate equation, explaining the reduction in
coercivity with the recovery progress and the variation of an activation energy from41–113 kJmol−1. The recrystallization kinetics is found faster at high annealing temperature 640 °C than 550 and 580 °C based on hardness measurement, justifying by apparent activation energy within 114–190 kJ/mol. Furthermore, the recovery and recrystallization rate increase with different annealing time, consistent to the change of microstructures and grain boundary characteristics evaluated by the orientation imaging microscopy (OIM) of electron backscattered diffraction (EBSD)
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