University of Houston

About: University of Houston is a education organization based out in Houston, Texas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 23074 authors who have published 53903 publications receiving 1641968 citations.

Highly Regioselective Arylation of sp3 C−H Bonds Catalyzed by Palladium Acetate

Abstract: A new palladium-catalyzed arylation process based on C−H activation has been developed. The utilization of pyridine-containing directing groups allows the β-arylation of carboxylic acid derivatives and γ-arylation of amine derivatives. Both primary and secondary sp3 C−H bonds, as well as sp2 C−H bonds, are reactive.

Materials for Solid Oxide Fuel Cells

Abstract: Solid oxide fuel cells (SOFCs) have the promise to improve energy efficiency and to provide society with a clean energy producing technology. The high temperature of operation (500−1000 °C) enables the solid oxide fuel cell to operate with existing fossil fuels and to be efficiently coupled with turbines to give very high efficiency conversion of fuels to electricity. Solid oxide fuel cells are complex electrochemical devices that contain three basic components, a porous anode, an electrolyte membrane, and a porous cathode. In this short review, a survey of the types and properties of materials that have been considered for each of these components is presented with an emphasis on the requirements for operation at intermediate temperature (500−800 °C). Some directions for future research are discussed.

The ALICE experiment at the CERN LHC

Abstract: ALICE (A Large Ion Collider Experiment) is a general-purpose, heavy-ion detector at the CERN LHC which focuses on QCD, the strong-interaction sector of the Standard Model. It is designed to address the physics of strongly interacting matter and the quark-gluon plasma at extreme values of energy density and temperature in nucleus-nucleus collisions. Besides running with Pb ions, the physics programme includes collisions with lighter ions, lower energy running and dedicated proton-nucleus runs. ALICE will also take data with proton beams at the top LHC energy to collect reference data for the heavy-ion programme and to address several QCD topics for which ALICE is complementary to the other LHC detectors. The ALICE detector has been built by a collaboration including currently over 1000 physicists and engineers from 105 Institutes in 30 countries. Its overall dimensions are 161626 m3 with a total weight of approximately 10 000 t. The experiment consists of 18 different detector systems each with its own specific technology choice and design constraints, driven both by the physics requirements and the experimental conditions expected at LHC. The most stringent design constraint is to cope with the extreme particle multiplicity anticipated in central Pb-Pb collisions. The different subsystems were optimized to provide high-momentum resolution as well as excellent Particle Identification (PID) over a broad range in momentum, up to the highest multiplicities predicted for LHC. This will allow for comprehensive studies of hadrons, electrons, muons, and photons produced in the collision of heavy nuclei. Most detector systems are scheduled to be installed and ready for data taking by mid-2008 when the LHC is scheduled to start operation, with the exception of parts of the Photon Spectrometer (PHOS), Transition Radiation Detector (TRD) and Electro Magnetic Calorimeter (EMCal). These detectors will be completed for the high-luminosity ion run expected in 2010. This paper describes in detail the detector components as installed for the first data taking in the summer of 2008.

Comprehensive Test of Phonological Processing

Abstract: in learning to read are most frequently contributed to weaknesses in the ability to process the phonological features of language (Blachman, 1994; Blachman, Tangel, Ball, Black, & McGraw, 1999; Fletcher & Lyon, 1998; Mathes, Howard, Allen, & Fuchs, 1998; National Research Council, 1998; Torgesen, Wagner, Rashotte, 1994; Torgesen, Wagner, Rashotte, Alexander, & Conway, 1997). The term phonology is of Greek origin, phone meaning &dquo;voice&dquo; or &dquo;sound.&dquo; Phonological processing refers to the use of the sound system of language to process written and oral infonnation, including sensitivity to the sound segments in verbal language (Clark & Uhry, 1995; Harm & Seidenberg, 1999; Mathes &