212 research outputs found

    Amplification of large-scale magnetic field in nonhelical magnetohydrodynamics

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    It is typically assumed that the kinetic and magnetic helicities play a crucial role in the growth of large-scale dynamo. In this paper we demonstrate that helicity is not essential for the amplification of large-scale magnetic field. For this purpose, we perform nonhelical magnetohydrodynamic (MHD) simulation, and show that the large-scale magnetic field can grow in nonhelical MHD when random external forcing is employed at scale 1/101/10 the box size. The energy fluxes and shell-to-shell transfer rates computed using the numerical data show that the large-scale magnetic energy grows due to the energy transfers from the velocity field at the forcing scales.Comment: 8 pages, 13 figure

    Energy transfers and magnetic energy growth in small-scale dynamo

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    In this letter we investigate the dynamics of magnetic energy growth in small-scale dynamo by studying energy transfers, mainly energy fluxes and shell-to-shell energy transfers. We perform dynamo simulations for magnetic Prandtl number Pm=20\mathrm{Pm}=20 on 102431024^3 grid using pseudospectral method. We demonstrate that the magnetic energy growth is caused by nonlocal energy transfers from the large-scale or forcing-scale velocity field to small-scale magnetic field. The peak of these energy transfers move towards lower wavenumbers as dynamo evolves, which is the reason why the integral scale of the magnetic field increases with time. The energy transfers U2UU2U (velocity to velocity) and B2BB2B (magnetic to magnetic) are forward and local.Comment: 6 pages, 8 figure

    Dynamo in Protostar

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    In this paper, we estimate the magnetic Reynolds number of a typical protostar before and after deuterium burning, and claim for the existence of dynamo process in both the phases, because the magnetic Reynolds number of the protostar far exceeds the critical magnetic Reynolds number for dynamo action. Using the equipartition of kinetic and magnetic energies, we estimate the steady-state magnetic field of the protostar to be of the order of kilo-gauss, which is in good agreement with observations.Comment: 5 page

    Human Rights of Men in the World of Globalization-An Essence of Time: A Critical Appraisal

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    The life, liberty, and security of men cannot be given into the hands of women as a puppet in the Rule of Law under the conception of human rights, bearing in mind the “abuses of the law, preconceived ideology, predefined consequences and others against men, subjecting to exceptions.”  Men have also the universal, inherent inalienable, and natural human right to life with dignity and security. In today’s changing globalized scenario, the human rights of men have become the need of the hour and essence of time by reason of arbitrary deprivation and denial of human rights. This research has no intention against women’s human rights and feminism in any case and circumstance.  Gender neutrality is required in today’s context for certain matters as to human rights otherwise than some exceptions and exclusions in accordance with the time, necessity, circumstances, and others in this regard This research has especially emphasized the specification of human rights of men in a global perspective. This research has emphasized the human rights of men in the world of globalization as an essence of time as available

    Justice Accessibility in perspective of Juristic Rational Science with Specific Dimension of Medical and Forensic Science

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    To get the Justice accessibility, the Medical and Forensic Science are found to function as one of roots of the Juristic Rational Science as the supplement specifically to ensure justice in matters of offences as murder, culpable homicide and others to obtain the evidence for reliance and proven or disproven the guilt or innocence of the person. In the offences of the life and personal liberty of humans, satisfactory justice accessibility is not found possible only in Juristic Rational Science without the support of Medical and Forensic Science, this research has inclusions of Justice Accessibility in Juristic Rational Science as to the offences against the human body which are the direct integral part of the life (soul) and personal liberty (whatever is needed for the human body to alive basically and advanced) of human with the coordination of Medical and Forensic Science including Medical Jurisprudence simultaneously

    Meninism and Preconceived Ideology with specific Indian Dimension of Human Rights in Today’s Changing Globalized Scenario: A Critical Appraisal

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    Men and Women both are an integral part of nature and integrant with each and another for wholeness to ensure the existence and survival of this human life in contrary time also for revitalization and revival in this mortal world. When time is changed then human conduct also changes consequently some women are abusing the law against men resultantly human rights of men are being violated very seriously in the gravest manner which is the contravention of life, personal liberty and security of men. The deprivation and endanger of life, personal liberty and security of men is in very plight conditions under exceptions in India. To prevent the abuses of law, preconceived ideology, predefined consequences against men in the protection of human rights to secure ends of justice for men is now need of hour and necessity. This research paper deals with human rights of men in today’s changing scenario. It has specially been emphasized on the preconceived ideology of people against men on this basis the discrimination and decision are taken prejudicially. Some laws also are in existence due to this preconceived ideology which is not justified in today’s changing globalized world under rule of law and democratic society, subjecting to exceptions. This preconceived ideology and its predefined consequences against men are inconsistent with and in derogation of human rights, abridging and taking away the rights of men. It reveals the Quantum of doctrine of protective discrimination for women against men, bearing in mind the principle of reasonable classification. When any person says or justifies that the particular thing is right or wrong, the same is stated on the basis of foundation root or quantum of knowledge of that person thereby the person has the understanding and sensibility accordingly and consequently, the person acts. But this research article does not include misogyny. It is not against the feminism. The history gives the evidences about the untold sorrow of women for the contravention of their human rights. This research article also is in favour of women empowerment and women human rights but no innocent men be sentenced. Everyone has inherent human rights by birth including human rights of men. Human rights for men are also available as per laws in today’s changing globalized world.&nbsp

    FIXED POINT THEOREMS USING (CLCS) PROPERTY IN COMPLEX VALUED bb-METRIC SPACES

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    Abstract. Various common fixed point theorems have been proved for oneor two pair of mappings using either (CLR) property ([24]), or by takingone of the range-subspace closed. In this paper, we introduce the notion of(CLCS)-property i.e., “common limit converging in the range sub-space”. Using this property, we prove common fixed point theorems for two pairs ofweakly compatible mappings in complex valued b-metric spaces satisfying acollection of contractive conditions. Our notion is meaningful and valid because the required common fixed point will always lie on the range-subspace of the mapping-pair. We give some examples to show that if a mapping pair (f, g) of a closed complex valued b-metric space X satisfy the (CLRf ) property, then it is also (CLRg), and vice-versa

    Correlation between vitamin D and lipid profile in patients with ischemic stroke

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    Background: This study aimed to investigate the relationship between serum vitamin D level and lipid profile in ischemic stroke patients.Methods: 217 patients with ischemic stroke were selected for analysis between ages 45 and 80 years admitted at our hospital from January 2014 to December 2015. Measurement of serum vitamin-D concentration was made by electrochemiluminescence immunoassay. Confounding variables like diabetes, hypertension, smoking, alcohol, tobacco, BMI, CRP, S. uric acid, duration of sunlight exposure, prior history of drug intake or fracture and S. calcium were considered. 200 age and sex matched controls were taken. The source of data was questionnaires and multiple linear regression analysis and correlation analysis were used.Results: A positive correlation was seen between vitamin D and serum cholesterol, VLDL, LDL, triglycerides, cholesterol/HDL ratio and LDL/HDL ratio but inverse correlation between vitamin D and HDL.Conclusions: In ischemic stroke patients increase in vitamin D is associated with increase in atherogenic lipids
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