49 articles in this issue
Vasudeo Patil, Jeevan Pawde, Rahul Mapari, Sachin Waghmare
In this paper, we aim to describe the cosmic late-time acceleration of the Universe in f(R,Lm) gravity framework proposed by Harko (2010) with the help of an equation of state for strange quark matter. To achieve this, we adopt a specific form of f(R,Lm) ... see more
S. Rita Devi, A. Senorita Devi, Atri Deshamukhya
The present work aims to study the previously unstudied Ultraluminous X-ray sources (ULXs) in the galaxy NGC 3585 at its various epochs of Chandra observation. We report here the detection of two new ULXs viz. CXOUJ111306.0-264825 (X-1) and CXOUJ111325.3-... see more
Sergiy Afanas'ev
The event distribution over the excitation energy of a system of two a-particles (Ex) is measured for the reaction 16O(?,4a). It is found that an intermediate excited 8Be nucleus is formed, and the channels of the 8Be nucleus ground state (GS) formation a... see more
Hadj Mouloudj, Benyoucef Mohammed-Azizi, Oussama Zeggai, Abdelkader Ghalem, Alla Eddine Toubal Maamar
This paper presents the analysis and implementation of the least-squares method based on the Gauss-Seidel scheme for solving nuclear mass formulas. The least-squares method leads to the solution of the system by iterations. The main advantages of the disc... see more
Igor V. Kyryllin, Mykola F. Shul’ga, Oleksandr P. Shchus
The work analyzes the dependence of the diffusion index of high-energy negatively charged particles on the energy of the transverse motion in oriented crystal. The crystal had an axial orientation relative to the direction of particle incidence. The analy... see more
Raksha Mundhra, P.N. Deka
Instability of ion cyclotron waves(ICWs) is investigated in presence of lower hybrid drift waves(LHDWs) turbulence. Plasma inhomogeneity in the Earth’s magnetopause region supports a range of low frequency drift wave turbulent fields due to gradients in d... see more
Harekrishna Deka, Jnanjyoti Sarma
This paper presents a comprehensive study of the numerical simulation of the one-dimensional modified Burgers' equation in dusty plasmas. The reductive perturbation method is employed to derive the equation, and a numerical solution is obtained using the ... see more
Rupam Shankar Nath, Rudra Kanta Deka, Himangshu Kumar
This research paper investigates the effects of thermal stratification on unsteady parabolic flow past an infinite vertical plate with chemical reaction. Using the Laplace transform method, analytical solutions are derived to simulate the physical process... see more
Himangshu Kumar, Rudra Kanta Deka
This study looks at how thermal and mass stratification affect the unsteady flow past an infinitely fast-moving vertical plate when the temperature is changing and there is exponential mass diffusion in a porous medium. By applying the Laplace transformat... see more
Keshab Borah, Jadav Konch, Shyamanta Chakraborty
A numerical study of the heat and mass transfer of a micropolar nanofluid flow over a stretching sheet embedded in a porous medium is carried out in this investigation. The main objective of this work is to investigate the influence of Arrhenius activatio... see more
Lina Wafaa Belhadj Senini, Mustpaha Boussoufi, Amina Sabeur
The objective of this study is to investigate, through numerical simulations, the flow and heat transfer characteristics of Al2O3, Cu, TiO2, and SiC water-based nanofluids flowing over micro-cylinder groups arranged in an inline configuration. The simulat... see more
Debozani Borgohain
The mathematical model to inspect the effects of changeable thermo-physical properties such as thermal conduction, slip effects and viscosity on Maxwellian nanofluid is proposed. The thermal conductivity increases rapidly due to presence of nanoparticles ... see more
Raymond A. Antwi, Isaac Nkrumah, Francis K. Ampong, Mark Paal, Reuben Y. Tamakloe, Robert K. Nkum, Francis Boakye
Pure and manganese doped zinc oxide nanoparticles have been successfully synthesized over the composition range, Zn1-xMnxO (0<x<0.5), by a solution growth process. The effect of Mn doping on the structure, morphology and optical properties were inve... see more
Abderrahim Yousfi, Okba Saidani, Zitouni Messai, Rafik Zouache, Mohamed Meddah, Younes Belgoumri
This paper presents a comprehensive simulation study on the influence of a triple absorber layer configuration in a perovskite-based solar cell using the SCAPS-1D software, under AM1.5 illumination. The simulated structure comprises a Cesium Tin-Germanium... see more
Sharifa B. Utamuradova, Zakirjan T. Azamatov, Murodjon A. Yuldoshev, Nurlan N. Bazarbayev, Abror B. Bakhromov
The article is devoted to nonlinear effects in lithium niobate crystals. The possibility of using digital holographic interferograms obtained with the help of laser radiation of different duration at different moments of time for the reconstruction of dyn... see more
Rustamjon G. Ikramov, Khurshidbek A. Muminov, Mashkhura A. Nuritdinova, Bobur Q. Sultonov, Oybek T. Kholmirzayev
The region of fundamental absorption in the optical spectra of amorphous semiconductors is theoretically studied using the Davis-Mott approximation according to the Kubo-Greenwood formula. As is known, three types of optical transitions of the electron ca... see more
Eshkuvat U. Arzikulov, Alisher D. Nurimov, F.A. Salakhitdinov, U.A. Ashirov, T.S. Sharafova, A.Sh. Khujanov, R.M. Usanov
This article presents experimental results on the technology of obtaining and studying the lateral photoelectric effect (LPE) in hybrid structures (HS) of the Fe/SiO2/p-Si<B, Mn> and Fe/SiO2/n-Si<B, Mn> types. The technology for obtaining such... see more
Khodjakbar S. Daliev, Zavkiddin E. Bahronkulov, Jonibek J. Hamdamov
This article discusses the electrical properties of silicon doped with rare earth elements (REE). Atoms of rare earth elements (REE) diffused onto the surface of the silicon substrate. To measure the electrical parameters, samples of n-Si, n-Si<Lu>,... see more
Daryabay M. Esbergenov, Elmira M. Naurzalieva, Sabirbay A. Tursinbaev
This research paper presents the findings of an investigation into the interaction between zinc (Zn) and nickel (Ni) impurity atoms within a silicon (Si) matrix, which were doped sequentially in various combinations. The characterization techniques employ... see more
Nurulla F. Zikrillaev, Maruf K. Khakkulov, Bobir O. Isakov
The paper presents the results of an experimental study of surface morphology, elemental composition, electrophysical and optical properties of Si samples earlier doped with impurity atoms of Zn and S. The results of the study revealed a sufficient concen... see more
Victor O. Dzenzerskiy, Serhii V. Tarasov, Elena V. Sukhova, Volodymyr A. Ivanov
This study is devoted to the investigation of mechanical properties of a series of low-antimony Pb–Sb–Sn–As–Se grid alloys for lead-acid batteries in as-cast condition and after natural aging during storage. Mechanical properties were characterized by ult... see more
Makhmudhodzha Sh. Isaev, Tokhirjon U. Atamirzaev, Mukhammadsodik N. Mamatkulov, Uralboy T. Asatov, Makhmudjon A. Tulametov
The temperature dependence of the mobility in chromium silicides in the temperature range of 80 ÷ 780 K was studied. The mobility gradually increases to a temperature of 350 K, then it saturates in the temperature range of 350 ÷ 450K, then gradually decre... see more
Khodjakbar S. Daliev, Sharifa B. Utamuradova, Zavkiddin E. Bahronkulov, Alisher Kh. Khaitbaev, Jonibek J. Hamdamov
In this work, lutetium-doped silicon samples were studied using the Raman scattering method. Registration and identification of both crystalline and amorphous phase components in the samples was carried out. There is some violation in the spectra of Raman... see more
Mykola S. Kukurudziak, Volodymyr M. Lipka
The paper investigates the influence of the electrophysical characteristics of silicon on the final parameters of photoelectronic elements using p-i-n photodiodes as an example. It has been found that photodiode samples made on the basis of silicon with a... see more
Shakhrukh Kh. Daliev, Fayzulla A. Saparov
Capacitance spectroscopy was used to study the capacitive-voltage characteristics of multilayer structures with a Si-SiO2 transition layer in Al-SiO2-n-Si type samples fabricated by the thermal oxidation of a semiconductor. It is shown that the inhomogene... see more
Muhammad R. Ramadhan, Salwa A. Khansa, Qoriana Zulindra, Dian P. Handayani, Nina A. Wardani, Fahmia Astuti
Due to the necessity of reducing the reliance on fossil fuels, several systems are considered to be alternative and/or additional support for the existing battery material. In this report, structural and electronic properties of aluminium oxide (Al2O3) an... see more
Amina Noual, Messai Zitouni, Zine-eddine Touati, Okba Saidani, Abderrahim Yousfi
This paper presents a comprehensive investigation into the DC analog and AC microwave performance of a state-of-the-art T-gate double barrier AlGaN/AlInGaN/GaN MOSHEMT (Metal Oxide Semiconductor High Electron Mobility Transistor) implemented on a 4H-SiC s... see more
Ishmumin D. Yadgarov, Farid F. Umarov, Asroriddin S. Kosimov, Khayitmurod I. Jabborov, Shodibek Y. Aminov
Graphene, a carbon sheet one atom thick, with carbon atoms arranged in a two-dimensional honeycomb configuration, has a number of intriguing properties. Fullerenes are a promising material for creating electro-active elements in solar cells and active lay... see more
Yousra Megdoud, Yamina Benkrima, Redhe Meneceur, Latifa Tairi, Abdelghani Lakel, Sebti Ghemid, Hocine Meradji
In this study, an analysis of chalcopyrite compounds CuInTe2 and CuInTe2 is presented, with a focus on their electronic, structural, optical, and thermal properties. The full-potential linearized augmented plane wave (FP-LAPW) method is employed for the i... see more
Rustamjon G. Ikramov, Khurshidbek A. Muminov, Mashkhura A. Nuritdinova, Bobur Q. Sutonov, Oybek T. Kholmirzayev, A’zamxo’ja A. Mamakhanov
In this work, defect absorption spectra for defects characteristic of hydrogenated amorphous silicon are theoretically studied. It is shown that in order to determine defect absorption spectra using the Kubo-Greenwood formula, the indefinite integral in t... see more
Nurulla F. Zikrillaev, Kutup S. Ayupov, Manzura M. Shoabdirahimova, Feruza E. Urakova, Yoldoshali A. Abduganiev, Abdujalol A. Sattorov, Latofat S. Karieva
One of the crucial phenomena is auto-oscillations of current in elementary and binary (AIIIBV, AIIBVI) semiconductor materials, which allow the creation of solid-state oscillators with a wide frequency range from 10-3 to 10-6 Hz. In this paper, we show th... see more
Sabitjan Ya. Inagamov, Ummatjon A. Asrorov, Erkin B. Xujanov
In this paper, the structure and physico-mechanical properties of films of polyelectrolyte complexes (PEC) based on sodium carboxymethylcellulose (Na-CMC) with linear polyacrylamide (PAA) have been studied. Polyelectrolyte complexes were obtained by mixin... see more
Omar Ben Lenda, Hajar El Ganich, El Madani Saad
The structural and mechanical studies of the AISI 302 steel aim to design a correct heat treatment in order to optimize its mechanical properties. In this study, we investigated the influence of temperature and time of aging on the structural and mechanic... see more
Sergey A. Pogarsky, Dmitry V. Mayboroda, Serhii M. Mykhaliuk
The paper presents the results of numerical modeling of the electrodynamic characteristics of a Vivaldi type patch antenna based on a circular disk resonator. The modeling was carried out using the semi-open resonator model by the finite element method (F... see more
Sergey P. Gokov, Viktor M. Horbach, Valentin I. Kasilov, Ludmila N. Kolpakova, Olena A. Lyukhtan, Evgen V. Tsiats’ko
In the work the computer model of a cell of a system for generating fluxes of therapeutic beams of delayed neutrons, based on the use of delayed fission neutrons, was developed in the Geant 4 environment. The principle of such a neutron source is that whe... see more
R. Chandra Sekhar Reddy, Ramasekhar Gunisetty
The advancement of aircraft technology has presented manufacturers with new criteria and problems for the functioning of their devices. It is essential that, in order to guarantee the secure operation of aerospace machinery, the failure mechanisms be iden... see more
Viktor Galaydych, Mykola Azarenkov
We have considered the refraction of surface electromagnetic waves (SEW) at the heterogeneous metasurface. The considered structure consists of three regions: mu-negative metamaterial, ordinary magnetic, and vacuum. The boundaries between considered media... see more
Mykola Azarenkov, Oleksii A. Haluza, Alexander V. Gapon, Volodymyr V. Lytvynenko
The aluminum alloys D16, D16AT are widely used as construction materials in the aircraft industry. Questions connected with the enhancement of the properties of the construction elements made of the alloys through surface modification are of great interes... see more
Sharifa B. Utamuradova, Khojakbar S. Daliev, Shakhrukh Kh. Daliev, Uktam K. Erugliev
The effect of thermal treatment on the behavior of samarium atoms introduced into silicon during the growth process was studied using the method of transient capacitive deep-level spectroscopy (DLTS). It has been shown that various high-temperature treatm... see more
Sharifa B. Utamuradova, Rustam Y. Rasulov, Voxob R. Rasulov, Kamolakhon K. Urinova, Kakhramon M. Fayzullaev
This article discusses studies of size quantization phenomena in zero-, one-, and two-dimensional semiconductor structures. The main attention is paid to the mechanisms of photon-kinetic effects in these structures. Despite many studies of the physical pr... see more
Muhammad Rameez Mateen, Roohi Zafar, Ahmed Ali Rajput, Shafiq Ur Rehman, Muhammad Mustaqeem Zahid
In this study, a well-known Weakest Bound Electron Potential Model (WBEPM) was used to determine the exited-state ionization potential of lithium-like elements for different iso-spectrum series such as 1s2 2p1 P1/2, 1s2 3s2 S1/2 , 1s2 3d2 ... see more
Olga Zhytniakivska, Uliana Tarabara, Kateryna Vus, Valeriya Trusova, Galyna Gorbenko
The protein-based nanosystems for targeted drug delivery of a wide array of substances, ranging from small drugs and therapeutic proteins to nucleic acids and genes, attract increasing attention due to their biocompatibility and biodegradability, extraord... see more
Dudekula Dastagiri Babu, S. Venkateswarlu, E. Keshava Reddy
Numerical model is conducted to investigate the behavior of an incompressible Maxwell nanofluid model flow on a convectively stretched surface, considering the effects of thermophoresis and an inclined magnetic field. The system, originally formulated as ... see more
Volodymyr Olefir, Oleksandr Sporov, Mykola Azarenkov
The article presents the results of the theoretical study of the plasma density axial distribution in a stationary gas discharge sustained by the eigen dipolar wave that propagates in a long cylindrical plasma-metal structure. The discharge structure cons... see more
Vyacheslav M. Beresnev, Serhii V. Lytovchenko, Mykola O. Azarenkov, Olga V. Maksakova, Denis V. Horokh, Bohdan O. Mazilin, Diana Kaynts, Irina V. Doshchechkina, ?leg V. Gluhov
Two series of multilayer coatings with different numbers of bilayers (268 and 536, respectively) were synthesised using the cathodic vacuum-arc deposition (CVAD) with the simultaneous sputtering of two different cathodes. The first cathode was made of the... see more
Gennadiy M. Onyshchenko, Boris V. Grynyov, Ivan I. Yakymenko, Sergey V. Naydenov, Pylyp E. Kuznietsov, Oleksandr Shchus
The results of the study of the contributions of the interaction reactions of fast neutron sources of 239Pu-Be and 252Cf to the counting efficiency of registration by oxide scintillators CdWO4, ZnWO4, Bi4Ge3O12 and Gd2SiO5, presented. The amount of g... see more
Kolawole M. Lawal, Etido P. Inyang, Efiong A. Ibanga, Funmilayo Ayedun
The current work deals with indoor radon (222Rn) concentrations measurements in the Calabar Study Centre of the National Open University of Nigeria using a Corentium Arthings digital radon detector meter for seven days representing a short–term average me... see more
Bhupendra Kumar Shukla, R.K. Tiwari, D. Sofuoglu, A. Beesham
Available observational data regarding current cosmological characteristics suggest that the universe is, to a large extent, both isotropic and homogeneous on a large scale. In this study, our objective is to analyze the Friedmann-Lemaitre-Robertson-Walke... see more
Zozan Y. Mohammed, Sarkawt A. Sami, Jalal M. Salih
The purpose of this Erratum is to correct a misprint presented in the original article.