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Wyświetlanie 1-15 z 25
Tytuł:
L-state analytical solution of the Klein-Gordon equation with position dependent mass using modified Deng-Fan plus exponential molecular potentials via Nikiforov-Uvarov method
Autorzy:
Itaa, B. I.
Louis, H.
Amos, P. I.
Joseph, I.
Nzeata-Ibe, N. A.
Magu, T. O.
Disho, H.
Powiązania:
https://bibliotekanauki.pl/articles/1178874.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Deng-Fan Potential
Exponential Molecular Potential
Klein-Gordon equation
Opis:
The solutions of the Klein-Gordon equation with Modified Deng-Fan plus Exponential molecular potentials (MDFEPP) has been presented using the Pekeris-like approximation and parametric Nikiforov-Uvarov (NU) method. The bound state energy eigenvalues and the corresponding un-unnormalized eigen functions are obtained in terms of Jacobi polynomials.
Źródło:
World Scientific News; 2017, 89; 64-70
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charged stellar model with a prescribed form of metric function y(x) in a Tolman VII spacetime
Autorzy:
Malaver, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/1163837.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Compact relativistic objects
Electromagnetic field
Gravitational potential
Metric function
Tolman VII type potential
Opis:
In this paper, we study the behaviour of compact relativistic objects with charged anisotropic matter distribution considering Tolman VII type potential for the gravitational potential Z(x) and a particular form of the metric function y(x) proposed for Komathiraj and Maharaj (2007). The Einstein-Maxwell field equations are integrated analytical and we obtain the radial pressure, energy density, charge density, anisotropy and the mass function. A physical analysis of electromagnetic field indicates that is regular at the origin and well behaved. The new stellar model satisfies all physical properties in a realistic star.
Źródło:
World Scientific News; 2018, 108; 41-52
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charged anisotropic models in a modified Tolman IV spacetime
Autorzy:
Malaver, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/1177697.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Adjustable parameter
Compact relativistic objects
Electromagnetic field
Gravitational potential
Metric function
Tolman IV type potential
Opis:
In this paper, we study the behaviour of compact relativistic objects with charged anisotropic matter distribution considering modified Tolman IV type potential for the gravitational potential Z(x) which depends on an adjustable parameter α and a particular form of the metric function y(x) used by Malaver (2009). The Einstein-Maxwell fields equations are integrated analytical and we obtain the radial pressure, energy density, charge density, anisotropy and the mass function. A physical analysis of electromagnetic field indicates that is regular at the origin and well behaved. The new stellar models satisfies all physical properties in a realistic star for any value of the adjustable parameter.
Źródło:
World Scientific News; 2018, 101; 31-43
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The DMAIC cycle in managing the development of work potential in service enterprise
Autorzy:
Kowalik, Kamila
Powiązania:
https://bibliotekanauki.pl/articles/1075594.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
DMAIC cycle
management
work potential development
Opis:
The objective of the analysis conducted and described in this paper is to present the practical application of the DMAIC cycle in managing the development of work potential in service enterprise. The first part of the article contains the theoretical framework of work potential, its development, and the DMAIC methodology. Afterwards, based on the process approach to work potential development, practical application of the DMAIC cycle has been presented with using an anonymous survey to measure and analyze the problem, the 5Why method for finding the causes, and the Impact and Effort Matrix in improvement phase to choose the solutions worth implementing.
Źródło:
World Scientific News; 2019, 122; 206-217
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytic spin and pseudospin solutions to the Dirac equation for the Manning-Rosen plus shifted Deng-Fan potential and Yukawa-like tensor interaction
Autorzy:
Ita, Benedict Iserom
Hitler, Louis
Nzeata-Ibe, Nelson
Innocent, Joseph
Amos, Pigwe Isa
Magu, Thomas Odey
Ivan, Opara
Powiązania:
https://bibliotekanauki.pl/articles/1178342.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Dirac equation
Manning-Rosen potential
Nikiforov-Uvarov Method
shifted Deng-Fan potential
spin and pseudospin symmetry
Opis:
We solve the Dirac equation for the Manning-Rosen plus shifted Deng-Fan potential including a Yukawa-like tensor potential with arbitrary spin–orbit coupling quantum number κ. In the framework of the spin and pseudospin (pspin) symmetry, we obtain the energy eigenvalue equation and the corresponding eigenfunctions in closed form by using the Nikiforov–Uvarov method. Also Special cases of the potential as been considered and their energy eigen values as well as their corresponding eigen functions are obtained for both relativistic and non-relativistic scope.
Źródło:
World Scientific News; 2017, 81, 2; 292-304
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bound State Solutions of the Klein Gordon Equation with Woods-Saxon Plus Attractive Inversely Quadratic Potential Via Parametric Nikiforov-Uvarov Method
Autorzy:
Ita, B. I.
Louis, H.
Magu, T. O.
Nzeata-Ibe, N. A.
Powiązania:
https://bibliotekanauki.pl/articles/1179619.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Attractive inversely quadratic potential
Bound state solutions
Klein-gordon equation
Nikiforov-Uvarov method
Woods-saxon potential
Opis:
We study the bound state solutions of the Klein-Gordon equation with Woods-Saxon plus attractive inversely quadratic potential using the parametric Nikiforov-Uvarov Method. We obtained the bound state energy eigenvalues and the corresponding normalized eigen functions expressed in terms of hypergeometric functions. Two special cases of this potential are discussed.
Źródło:
World Scientific News; 2017, 74; 280-287
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of groundwater potential zone using Geospatial Technology in Bahir Dar Zuria District, Amhara, Ethiopia
Autorzy:
Yihunie, Dawit
Halefom, Afera
Powiązania:
https://bibliotekanauki.pl/articles/1031666.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ethiopia
GIS
Groundwater potential
geology
geospatial technology
Opis:
Geospatial technology has been done to identify spatially the extents of highly suitable and moderately suitable areas for groundwater demarcation. Several input parameters (land use, soil type, slope, geology, geomorphology, and lineament) used to maps Groundwater potential assessment. Each thematic map has been reclassified into five classes. Suitable weightages have been given to each class with respect to its groundwater potential influences. Area of all raster formats of all parameters were calculated by GIS environment. All the weighted input parameters have been overlaid using “Weighted Overlay Analysis” tool in ArcGIS 10.3 platform. The results showed that 8.26 Km2, 441.74 Km2, 812.86 Km2, 198.01 Km2 and 80.57 Km2 of the study area fall in “Highly suitable, High, suitable, Medium suitable, Low suitable and Very Low suitable” category of groundwater potential respectively.
Źródło:
World Scientific News; 2020, 146; 274-289
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bound State Solutions of the Schrӧdinger’s Equation with Manning-Rosen Plus a Class of Yukawa Potential Using Pekeris-like Approximation of the Coulomb Term and Parametric Nikiforov-Uvarov
Autorzy:
Ita, B. I.
Louis, H.
Magu, T. O.
Nzeata-ibe, N. A.
Powiązania:
https://bibliotekanauki.pl/articles/1178569.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Jacobi polynomials
Manning-Rosen potential
Parametric Nikiforov-Uvarov method
Pekeris-like approximation
Schrӧdinger equation
Yukawa potential
Opis:
The solutions of the Schrӧdinger equation with Manning-Rosen plus a class of Yukawa potential (MRCYP) have been presented using the Pekeris-like approximation and parametric Nikiforov-Uvarov (NU) method. The bound state energy eigenvalues and the corresponding un-normalized eigen functions are obtained in terms of Jacobi polynomials. Also, inversely quadratic Yukawa, Yukawa, Manning-Rosen and coulomb potentials have been recovered from the mixed potential and their Eigen values obtained. The Numerical results are computed for some values of n at l = 0 with α = 0.01, 0.1, 2 and 5 using python 3.6 programming, and these results could be applied to molecules moving under the influence of MRYP potential as negative energy eigenvalues obtained indicate a bound state system.
Źródło:
World Scientific News; 2017, 70, 2; 312-319
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Stage of Tourism Development in Uzbekistan: Actual Problems and Perspectives
Autorzy:
Khamidov, Obidjon
Powiązania:
https://bibliotekanauki.pl/articles/1178282.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Tourism
Uzbekistan tourism
ecotourism
tourism infrastructure
tourism potential
Opis:
This paper investigates major points of tourism sector in Uzbekistan while making emphasize on outlook development perspectives. Moreover, the way of tourism advancement with major outcomes and shortcomings are also underlined with the systematic analyses. In addition, socio-economic development of the study with the positive modernization and diversification possibilities were stated in order to conduct probable future investigations in the future. Last but not least, eco-tourism perspective of country has been analyzed and accentuated as one of the most developing direction of tourism as whole.
Źródło:
World Scientific News; 2017, 86, 3; 134-149
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Making the most of employee as a key element human resources management
Autorzy:
Jędrzejas, Natalia
Sobiegraj, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/1189850.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
staff potential
competencies
employee commitment
human capital
talent management
Opis:
The purpose is to determine the feasibility potential of Staff in the effective management of human resources. The article highlights the fact that appropriate use of competencies the employee contributes to improved labor productivity and increase the competitiveness of the organization. The paper characterized the essence of employee potential, competence and commitment of employees to the job. Based on studies it has been shown that employees have a sense that their potential is not fully exploited. It was found that the maintenance involved employees are required to entrust them with specific tasks that will allow for their development and job satisfaction. Managing a team of people showing extraordinary personality traits requires an individual approach and adapting their competence to the requirements of a particular job.
Źródło:
World Scientific News; 2016, 48; 211-221
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical study of the effect the hydroxyl subgroups on the electronic properties of iso-indene molecule
Autorzy:
Obayes, Abbas Ibrahim
Hasan, Nahida B.
Aboud, Hamed Ibrahem
Mohammed, Mohammed Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/1191969.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
DFT
energy gap
ionization potential
hardness and IR-spectrum
Opis:
In this work, six molecules model are optimized at B3LYP/6-31G** density functional theory. Electronic properties of iso-indene molecules were investigated depending on the three parameters (B3LYP) by density functional theory method. The best geometry for all molecules were investigated at (6-31G**) basis sets. The total energies, energy gaps, ionization potentials, electron affinities and softness were calculated for the studied molecules. Adding the (OH) ion and Nitrogen, Sulfur atoms to the iso-indene molecules leads to decrease the energy gap and the hardness of the studied molecules. The IR-spectra shows the effect of adding the (OH) ion and Nitrogen, Sulfur atoms in the ring on the vibrations of the reference molecule, the electronic properties and IR spectrum for all molecules were investigated by Gaussian 03 program.
Źródło:
World Scientific News; 2016, 50; 49-63
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A modified Nuclear Model for Binding Energy of Nuclei
Autorzy:
Sirma, K. K.
Chelimo, L. S.
Khanna, K. M.
Powiązania:
https://bibliotekanauki.pl/articles/1030120.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Core
Heavy Nuclei
Isotones
Isotopes
Potential
Surface region
light Nuclei
Opis:
A new nuclear model to calculate the binding energy of nuclei is proposed. The nucleus is assumed to be composed of two regions; the inner core region and surface region. The inner core is assumed to be composed of Z proton-neutron pairs (Z = N) and the surface region is composed of the unpaired neutrons for a nucleus in which N>Z. The interaction between the core and neutrons in the surface region is assumed to be such that it leads to an average potential Vo in which each neutron in the surface region can move. Knowing the experimental values for the binding energy of nuclei, this average interaction potential Vo has been calculated for light, medium and heavy nuclei. It is found that Vo varies for isotopes and isotones. For isotopes the value of Vo decreases as the neutron number (N) in the surface region of the nucleus increases. The decrease in Vo is quite large when the neutron number increases by unity in light nuclei compared to heavy nuclei. For isotones, the value of Vo increases with an increase in proton number (Z). This is evident for both light nuclei and heavy nuclei.
Źródło:
World Scientific News; 2020, 143; 203-223
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Industrial Revolution 4.0: An Overview of Readiness and Potential Economic Effects in Malaysia from Millennial’s Perspective
Autorzy:
Idris, Rafiq
Powiązania:
https://bibliotekanauki.pl/articles/1076012.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Industrial Revolution 4.0
millennials
potential effects
public university
readiness
Opis:
Industrial Revolution 4.0 (IR 4.0) and Internet of Things (IOT) have become subjects of much interest in recent years and are expected to gain momentum locally and internationally when they become part of the core initiative of various governments. With the advent of the 4th global industrial revolution, the government recognized the importance of integrating the IR 4.0 initiative into the national agenda as a mean to keep pace with the latest advancements. In this regard, is the Malaysian workforce ready for the change? How is this being perceive by the millennials? Are millennials familiar with internet of things, FINTECH, additive manufacturing, big data or smart manufacturing? This study attempts to investigate whether or not millennials studying at local public university are clear about IR 4.0. In addition, the study attempts to seek millennials on various issues pertaining IR4.0. A survey involving 400 students of public university in Malaysia are being undertaken. The finding of the study indicates that 90% of the respondents have heard about IR4.0. In addition, 70% expressed that they have some understanding on what is happening and expected to happen in the Fourth Industrial Revolution (IR 4.0) in general. There are also concern with regard to the potential impact of IR4.0 on unemployment and the economy.
Źródło:
World Scientific News; 2019, 118; 273-280
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and Theoretical Investigation to Study the Molecular Structure, Electronic Properties, UV–Vis Spectra of Coumarin 102
Autorzy:
Mohi, Ali T.
Abood, Tareq H.
Hadi, Hasan A.
Karim, Mahmood S.
Mutlik, Falah A-H.
Alwan, Tariq J.
Powiązania:
https://bibliotekanauki.pl/articles/1178533.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
DFT
Ionization potential
TDDFT
electron affinity
energy gap and UV spectra
Opis:
In this work, we study the structure, electronic properties and electronic spectra of Coumarin 102 (C102) dissolved in ethanol as an experimental-theoretical investigation. The various properties of the ground and excited electronic states of coumarins 102 using density functional theory (DFT) and time-dependent density functional theory (TDDFT) was calculated by the B3LYP density functional model with 6-31G(d,p) basis set by Gaussian 09 W program. Spectral characteristics of coumarin 102 have been probed into by methods of experimental UV-visible, and quantum chemistry. The UV spectrum was measured in Ethanol. The optimized structures, total energies, electronic states (HOMO- LUMO), energy gap, ionization potentials, electron affinities, chemical potential, global hardness, softness, global electrophilictity, dipole moment and electrostatic potential was calculated. were calculated. We find good agreement between experimental data of UV spectrum and TDDFT excitation energies.
Źródło:
World Scientific News; 2017, 70, 2; 216-229
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Equalized mass can explain the dark energy or missing mass problem as higher density of matter in stars amplifies their attraction
Autorzy:
Czajko, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1179255.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Equalized mass; complete total potential energy; dark matter/energy; missing mass
Opis:
In order to compare properties of celestial bodies regardless of their motions, their masses, which represent also their energy spent on resistance to forced motions, should be expressed with respect to the same (for all of them) material substance, such as water, for instance. Then their density of matter, which has been defined as the ratio of their actual mass/bulk to an equivalent mass of water, should also be taken into account even in the radial Newtonian law of gravitation. Such an equalized mass adheres to the Newton’s definition of “quantity of matter” as conjoined feature (i.e. product) of matter density and the bulk=mass of the body, even though he has never really operated on the notion so defined. The equalized mass conforms to the Einstein’s concept of mass as equivalent of energy, both of which vary with speed. Hence the product of equalized mass and density of matter can increase the radial gravitational force of very dense stars, easing the problem of the allegedly missing mass that pushes galaxies too far away according to former estimates of their masses and their distances. Besides the equalized mass, the need for which has emerged from presence of nonradial potentials acting along paths on equipotential surfaces in radial/center-bound force fields, the repulsive effects of the nonradial angular potentials can also amplify the regular/innate spins of stars, black holes and galaxies, eliminating thus the need for the so-called dark matter/energy invented just to explain the allegedly missing mass/energy.
Źródło:
World Scientific News; 2017, 80; 207-238
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

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