3,908 research outputs found

    Structural and decay properties of Z=132,138Z=132,138 superheavy nuclei

    Full text link
    In this paper, we analyze the structural properties of Z=132Z=132 and Z=138Z=138 superheavy nuclei within the ambit of axially deformed relativistic mean-field framework with NL33^{*} parametrization and calculate the total binding energies, radii, quadrupole deformation parameter, separation energies, density distributions. We also investigate the phenomenon of shape coexistence by performing the calculations for prolate, oblate and spherical configurations. For clear presentation of nucleon distributions, the two-dimensional contour representation of individual nucleon density and total matter density has been made. Further, a competition between possible decay modes such as α\alpha-decay, β\beta-decay and spontaneous fission of the isotopic chain of superheavy nuclei with Z=132Z=132 within the range 312 \le A \le 392 and 318 \le A \le 398 for Z=138Z=138 is systematically analyzed within self-consistent relativistic mean field model. From our analysis, we inferred that the α\alpha-decay and spontaneous fission are the principal modes of decay in majority of the isotopes of superheavy nuclei under investigation apart from β\beta decay as dominant mode of decay in 318322138^{318-322}138 isotopes.Comment: 16 pages, 10 figures , 8 table

    Theoretical studies on structural and decay properties of Z=119Z=119 superheavy nuclei

    Full text link
    In this manuscript, we analyze the structural properties of Z=119Z=119 superheavy nuclei in the mass range of 284 \le A \le 375 within the framework of deformed relativistic mean field theory (RMF) and calculate the binding energy, radii, quadrupole deformation parameter, separation energies and density profile. Further, a competition between possible decay modes such as α\alpha-decay, β\beta-decay and spontaneous fission (SF) of the isotopic chain of Z=119Z=119 superheavy nuclei under study is systematically analyzed within self-consistent relativistic mean field model. Moreover, our analysis confirmed that α\alpha-decay is restricted within the mass range 284 \leq A \leq 296 and thus being the dominant decay channel in this mass range. However, for the mass range 297 \leq A \leq 375 the nuclei are unable to survive fission and hence SF is the principal mode of decay for these isotopes. There is no possibility of β\beta-decay for the considered isotopic chain. In addition, we forecasted the mode of decay 284296^{284-296}119 as one α\alpha chain from 284^{284}119 and 296^{296}119, two consistent α\alpha chains from 285^{285}119 and 295^{295}119, three consistent α\alpha chains from 286^{286}119 and 294^{294}119, four consistent alpha chains from 287^{287}119, six consistent alpha chains from 288293^{288-293}119. Also from our analysis we inferred that for the isotopes 264266,269^{264-266,269}Bh both α\alpha decay and SF are equally competent and can decay via either of these two modes. Thus, such studies can be of great significance to the experimentalists in very near future for synthesizing Z=119Z=119 superheavy nuclei.Comment: 14 pages, 6 figures. arXiv admin note: text overlap with arXiv:1611.00232, arXiv:1704.0315

    The Influence of Profitability and Leverage on Corporate Social Responsibility Disclosure

    Full text link
    This study aims to examine the influence of profitability and leverage on corporate social responsibility disclosure. The study was conducted in companies listed in Indonesia Stock Exchange. Profitability and leverage were treated as independent variables, while disclosure of corporate social responsibility is the dependent variable. The research method was used in this research is a verificative approach. The population in this study is the companies listed in Indonesia Stock Exchange. Sample of the study is the companies included as a member of LQ 45 index for period 2013-2015. Total listed companies were involved in this study is 67 companies. The sampling technique used in this study is nonprobability sampling with the purposive sampling method. The data analysis used in this study is multiple linear regression analysis at a significance level of 5%. The statistical program was used in analyzing data is Eviews version 8. The results showed that profitability influences corporate social responsibility disclosure. However, leverage does not influence corporate social responsibility disclosure. Simultaneously, profitability and leverage influence corporate social responsibility disclosur

    Wireless Communication in Process Control Loop: Requirements Analysis, Industry Practices and Experimental Evaluation

    Get PDF
    Wireless communication is already used in process automation for process monitoring. The next stage of implementation of wireless technology in industrial applications is for process control. The need for wireless networked control systems has evolved because of the necessity for extensibility, mobility, modularity, fast deployment, and reduced installation and maintenance cost. These benefits are only applicable given that the wireless network of choice can meet the strict requirements of process control applications, such as latency. In this regard, this paper is an effort towards identifying current industry practices related to implementing process control over a wireless link and evaluates the suitability of ISA100.11a network for use in process control through experiments

    The Significance of Petroleum Bitumen in Ancient Egyptian Mummies

    Get PDF
    © 2016 The Author(s) Published by the Royal Society. All rights reserved. Mummification was practised in ancient Egypt for more than 3000 years, emerging from initial observations of buried bodies preserved by natural desiccation. The use of organic balms (and other funerary practices) was a later introduction necessitated by more humid burial environments, especially tombs. The dark colour of many mummies led to the assumption that petroleum bitumen (or natural asphalt) was ubiquitous in mummification; however, this has been questioned for more than 100 years. We test this by investigating 91 materials comprising balms, tissues and textiles from 39 mummies dating from ca 3200 BC to AD 395. Targeted petroleum bitumen biomarker (steranes and hopanes) analyses by gas chromatography-mass spectrometry selected ion monitoring (GC-MS SIM, m/z 217 and 191) showed no detectable bitumen use before the New Kingdom (ca 1550-1070 BC). However, bitumen was used in 50% of New Kingdom to Late Period mummies, rising to 87% of Ptolemaic/Roman Period mummies. Quantitative determinations using 14C analyses reveal that even at peak use balms were never more than 45% w/w bitumen. Critically, the dark colour of balms can be simulated by heating/ageing mixtures of fats, resins and beeswax known to be used in balms. The application of black/dark brown balms to bodies was deliberate after the New Kingdom reflecting changing funerary beliefs and shifts in religious ideology

    Quantum Logic Network for Probabilistic Teleportation of Two-Particle State of General Form

    Full text link
    A simplification scheme of probabilistic teleportation of two-particle state of general form is given. By means of the primitive operations consisting of single-qubit gates, two-qubit controlled-not gates, Von Neumann measurement and classically controlled operations, we construct an efficient quantum logical network for implementing the new scheme of probabilistic teleportation of a two-particle state of general form.Comment: 9 pages, 2 figure

    Engineering Entanglement between two cavity modes

    Full text link
    We present scheme for generation of entanglement between different modes of radiation field inside high-Q superconducting cavities. Our scheme is based on the interaction of a three-level atom with the cavity field for pre-calculated interaction times with each mode. This work enables us to generate complete set of Bell basis states and GHZ state

    Plasma amyloid-β levels, cerebral atrophy and risk of dementia: A population-based study

    Get PDF
    Background: Plasma amyloid-β (Aβ) levels are increasingly studied as a potential accessible marker of cognitive impairment and dementia. However, it remains underexplored whether plasma Aβ levels including the novel Aβ peptide 1-38 (Aβ1-38) relate to preclinical markers of neurodegeneration and risk of dementia. We investigated the association of plasma Aβ1-38, Aβ1-40, and Aβ1-42 levels with imaging markers of neurodegeneration and risk of dementia in a prospective population-based study. Methods: We analyzed plasma Aβ levels in 458 individuals from the Rotterdam Study. Brain volumes, including gray matter, white matter, and hippocampus, were computed on the basis of 1.5-T magnetic resonance imaging (MRI). Dementia and its subtypes were defined on the basis of internationally accepted criteria. Results: A total of 458 individuals (mean age, 67.8 ± 7.7 yr; 232 [50.7%] women) with baseline MRI scans and incident dementia were included. The mean ± SD values of Aβ1-38, Aβ1-40, and Aβ1-42 (in pg/ml) were 19.4 ± 4.3, 186.1 ± 35.9, and 56.3 ± 6.2, respectively, at baseline. Lower plasma Aβ1-42 levels were associated with smaller hippocampal volume (mean difference in hippocampal volume per SD decrease in Aβ1-42 levels, - 0.13; 95% CI, - 0.23 to - 0.04; p = 0.007). After a mean follow-up of 14.8 years (SD, 4.9; range, 4.1-23.5 yr), 79 persons developed dementia, 64 of whom were diagnosed with Alzheimer's disease (AD). Lower levels of Aβ1-38 and Aβ1-42 were associated with increased risk of dementia, specifically AD (HR for AD per SD decrease in Aβ1-38 levels, 1.39; 95% CI, 1.00-2.16; HR for AD per SD decrease in Aβ1-42 levels, 1.35; 95% CI, 1.05-1.75) after adjustment for age, sex, education, cardiovascular risk factors, apolipoprotein E ϵ4 allele carrier status, and other Aβ isoforms. Conclusions: Our results show that lower plasma Aβ levels were associated with risk of dementia and incident AD. Moreover, lower plasma Aβ1-42 levels were related to smaller hippocampal volume. These results suggest that plasma Aβ1-38 and Aβ1-42 maybe useful biomarkers for identification of individuals at risk of dementia
    corecore