Constraints on the Neutrino Parameters from the `Rise-up' in the Boron Neutrino Spectrum at Low Energies

The rise-up in boron neutrino spectrum at low energies has been studied within the framework of `pure LMA' scenario. Indirect bounds on the spectral `upturn' have been obtained from the available solar neutrino data. These bounds have been used to demonstrate the efficacy of the precision measurements of the `upturn' for further constraining the neutrino parameter space allowed by SNO salt phase data. The sterile neutrino flux has been constrained in the light of the recent 766.3 Ty KamLAND spectral data.Comment: Latex 10pages including 3 postscript figure

Singular Effect of Disorder on Electronic Transport in Strong Coupling Electron-Phonon Systems

We solve the disordered Holstein model in three dimensions considering the phonon variables to be classical. After mapping out the phases of the `clean' strong coupling problem, we focus on the effect of disorder at strong electron-phonon (EP) coupling. The presence of even weak disorder (i) enormously enhances the resistivity (\rho) at T=0, simultaneously suppressing the density of states at the Fermi level, (ii) suppresses the temperature dependent increase of \rho, and (iii) leads to a regime with d\rho/dT <0. We locate the origin of these anomalies in the disorder induced tendency towards polaron formation, and the associated suppression in effective carrier density and mobility. These results, explicitly at `metallic' density, are of direct relevance to disordered EP materials like covalent semiconductors, the manganites, and to anomalous transport in the A-15 compounds.Comment: Final versio

Effect of the symmetry energy on nuclear stopping and its relation to the production of light charged fragments

We present a complete systematics (excitation function, impact parameter, system size, isospin asymmetry, and equations of state dependences) of global stopping and fragment production for heavy-ion reactions in the energy range between 50 and 1000 MeV/nucleon in the presence of symmetry energy and an isospin-dependent cross section. It is observed that the degree of stopping depends weakly on the symmetry energy and strongly on the isospin-dependent cross section. However, the symmetry energy and isospin-dependent cross section has an effect of the order of more than 10% on the emission of light charged particles (LCP's). It means that nuclear stopping and LCP's can be used as a tool to get the information of an isospin-dependent cross section. Interestingly, the LCP's emission in the presence of symmetry energy is found to be highly correlated with the global stopping.Comment: 16 pages, 8 figure

Do CIOs Matter? Assessing the Value of CIO Presence in Top Management Teams

Though the importance of Chief Information Officers (CIOs) is well recognized in academic literature, concerns have often been expressed about the status of CIOs and their waning influence. In fact, not all firms choose to have Chief Information Officers (CIOs)as a part of their top management teams. This research investigates whether CIO presence/absence in top management teams affect firm performance. We assembled a multi-industry dataset of 205 firms that included CIOs in their TMTs and assessed their financial and market performance over a three year period (2002-2004). We found firms that included CIOs in their top management teams to have significantly better financial performance than their peer firms who did not. The results and their implications are discussed. This study provides an initial step towards understanding the empirical linkages between IT leadership and firm performance

Adoption of RFID Technology: An Exploratory Examination from Supplier\u27s Perspective

RFID technology has attracted the attention of several businesses and experts worldwide. Given the potential benefits of RFID such as efficient inventory, streamlined supply chain, reduced stock outs and cost reductions, several retailers such as Wal-Mart and Target have decided to adopt RFID technologies. They have also mandated their suppliers to adopt and use RFID technologies. However, anecdotal reports suggest several challenges that suppliers need to address in the process of RFID adoption. Drawing upon innovation diffusion and inter-organizational technology adoption literature, we seek to understand the RFID adoption process in supplier firms and identify key factors affecting RFID adoption by suppliers. We propose a two-stage research design involving exploratory interviews, followed by a survey. Preliminary results from our ongoing research project will be discussed at AMCIS

Examining the Compensation of Chief Information Officers: Do Firm Performance, Size and Industry Membership Matter?

Increased uncertainty in the economic and business environments have placed IS function and IS leadership in a quandary today. In this paper, we empirically examine the remuneration of CIOs, and examine their association with firm performance, size and industry membership. Based on compensation data of 213 CIOs in 2002, we test several hypotheses linking the total, annual cash, and long term components of the CIO compensation with firm and industry variables. Our results indicate a strong relationship between CIO compensation and performance, firm size, and industry membership. Firm performance exhibited a strong positive association with all components of CIO pay. Firm size was found to have significant positive association with the total pay and the annual cash components. We also found support for association between specific industry memberships (finance and insurance, manufacturing, and professional services) and CIO pay

Coronary computed tomography angiography of spontaneous coronary artery dissection: A case report and review of the literature

Patient: Male, 23 Final Diagnosis: Spontaneous coronary artery dissection Symptoms: Chest discomfort • chest pain Medication: — Clinical Procedure: Coronary computed tomography angiography Specialty: Radiology OBJECTIVE: Rare disease BACKGROUND: Multidetector computed tomography (MDCT) has gained wide acceptance in the evaluation of the cardiovascular system. Of particular clinical interest is its ability to non-invasively evaluate coronary arteries in patients presenting to the emergency room. In acute coronary syndromes, myocardial ischemia is most often caused by atherosclerosis. We present a case of a rare cause of acute coronary syndrome, spontaneous coronary artery dissection (SCAD), which was initially evaluated with MDCT and followed by intravascular ultrasound (IVUS) and invasive coronary angiography (ICA). We discuss the findings and role of each modality with particular attention to coronary computed tomographic angiography (CCTA) in the diagnosis and management of SCAD. As the use of CCTA in the emergency department continues to rise, radiologists must become familiar with CT appearance of SCAD. CASE REPORT: We report the multidetector computed tomography (MDCT), intravascular ultrasound (IVUS), and invasive coronary angiography (ICA) findings in a case of spontaneous coronary artery dissection of the left anterior descending artery in a previously healthy 23-year-old man. The role of coronary computed tomographic angiography (CCTA) in diagnosis and management of this potentially life-threatening condition is discussed. CONCLUSIONS: In the clinical setting of acute coronary syndrome, SCAD must be a consideration, particularly in young patients without clear risk factors for coronary artery disease and in women in the peripartum period. CCTA is a very helpful diagnostic tool to diagnose the condition in a non-invasive manner and to follow up after treatment