Kent State University

About: Kent State University is a education organization based out in Kent, Ohio, United States. It is known for research contribution in the topics: Liquid crystal & Population. The organization has 10897 authors who have published 24607 publications receiving 720309 citations. The organization is also known as: Kent State & KSU.

Multichannel resonance parametrization of pi N scattering amplitudes.

Abstract: A new manifestly time-reversal invariant and unitary parametrization of {ital S}-matrix elements is described. The method is simpler than the {ital K}-matrix approach in that resonance parameters are parametrized directly. The technique is used to extract resonance parameters from partial-wave amplitudes for {pi}{ital N}{r arrow}{pi}{ital N} and from isobar-model amplitudes for {pi}{ital N}{r arrow}{pi}{pi}{ital N}. Resonance parameters obtained from this approach are tabulated and compared to predictions of quark-model calculations and to results of previous work.

Transition metal dichalcogenides for alkali metal ion batteries: engineering strategies at the atomic level

Abstract: In the past few decades, great effort has been made toward the preparation and development of advanced transition metal dichalcogenide (TMD) materials for anodes of alkali metal ion batteries (AMIBs). However, their electrochemical performance is still severely impaired by structural aggregation and fracture during the conversion reaction. To address these issues, various methodologies for the fabrication of hierarchical and hybrid nanostructures, with optimization of materials and electrodes, have been fully investigated and reviewed. As regards tuning the TMD-based materials, extensive efforts have been undertaken toward optimization of their intrinsic structure at the atomic level, including surface defects, interlayer spacing expansion, phase control, alloying, and heteroatom doping. However, the design strategies and methods to manipulate the intrinsic structures and electrochemical mechanisms in AMIBs have not been fully summarized. This review provides a well-timed and critical appraisal of recent advances in the engineering of TMDs at the atomic level for AMIBs, by combining computational and experimental approaches. The correlation between these strategies and electrochemical performance is highlighted. The challenges and opportunities in this research field are also outlined. We expect that this review would be beneficial for improving the overall knowledge on the charge storage mechanisms in TMDs and for pointing out the importance of intrinsic structure engineering for enhancing the performance of TMDs in energy storage.

Baryon stopping and charged particle distributions in central Pb + Pb collisions at 158 GeV per nucleon

Abstract: Net proton and negative hadron spectra for central Pb+Pb collisions at 158thinspthinspGeV per nucleon at the CERN Super Proton Synchrotron were measured and compared to spectra from lighter systems. Net baryon distributions were derived from those of net protons. Stopping (rapidity shift with respect to the beam) and mean transverse momentum {l_angle}p{sub T}{r_angle} of net baryons increase with system size. The rapidity density of negative hadrons scales with the number of participant nucleons for nuclear collisions, whereas their {l_angle}p{sub T}{r_angle} is independent of system size. The {l_angle}p{sub T}{r_angle} dependence upon particle mass and system size is consistent with larger transverse flow velocity at midrapidity for Pb+Pb compared to S+S central collisions. {copyright} {ital 1999} {ital The American Physical Society}

Computer anxiety in management: myth or reality?

Abstract: Although many informal surveys in the business press have contended that computer anxiety has a significant adverse impact on managers' willingness to use microcomputers, the problem is neither as extensive nor as severe as once believed.