Digital Commons Network^™

Influence Of The Effective Mass Of The Density Of The State On The Temperature Dependence Of The Band Band Width In Solid Solutions P-Bi2-Xsbxte3-Ysey, Sharibaev N.Y., Dadamirzaev M.G., Sharifbaev R.N.

Euroasian Journal of Semiconductors Science and Engineering

The temperature dependence of the energy spectrum of semiconductors is well explained by the thermal broadening of discrete energy spectra. The temperature dependence of the band gap is considered as broadening of the energy states of the conduction and valence bands. In these works, it was assumed that the effective mass of the density of states does not depend on temperature. However, as experiments have shown, the effective mass of the density of states depends on temperature. These changes in the effective mass change the temperature dependence of the band gap.

Temperature Dependence Of Active And Reactive Impedances Of Pmma-Ec-Litf2 / Mgtf2 Solid Polymer Electrolytes, Mamatkarimov O., Uktamaliyev B., Abdukarimov A., Arof A.K.

Euroasian Journal of Semiconductors Science and Engineering

In this work, PMMA-EC-LiTf2, PMMA-EC-MgTf2 samples were prepared at a concentration of 20%. Using Nyquist coordinates, results were obtained for active and reactive impedances at temperatures from 243K to 283 K and at temperatures from 303 K to 373 K. Rb from MgTf2 system are lower than LiTf2 in the room temperature. PMMA-EC-MgTf2 sample conductivity is 4.34∙10−51Ом∙см, PMMA-EC-LiTf2 sample conductivity is 3,07∙10−41Ом∙см

Impedance Spectroscopy Of New Type Solar Elements In Studying Dependence On External Forces, Sharibaev N.Y., Ergashov A.K., Sharifbaev R.N.

Euroasian Journal of Semiconductors Science and Engineering

Planning and improvement work has been done to create a mobile device that will increase the efficiency and speed of work when using experiments on low-power solar energy and sensitive photocells. (TiO2) was selected to study the dependence of the selection of different local dye compositions and (DSSC) permeability on external influences on the factors influencing the efficiency.

About The Characteristics Of Multilayer Thin-Film Structures With Dyes Based On Titanium Dioxide, Mamatkarimov O., Abdukarimov A., Uktamaliev B.

Euroasian Journal of Semiconductors Science and Engineering

Polyethylene oxide (PEO) gel polymer electrolytes (GPEs) were prepared using tetrapropylammonium iodide (TPAI). The mass fraction (TPAI) in the electrolyte was varied to increase the productivity of the solar cell. It increased the ionic conductivity of the electrolyte at room temperature from 8.426 1mОhm∗sm and 373K temperature to 18.117 1mОhm∗sm. The increase in ionic conductivity with the addition of TPAI salts was associated with an increase in the diffusion coefficient, mobility, and density of charge carriers.

Lаndаu Levels In Twо-Dimensiоnаl Semicоnductоr Structures, Gulyаmоv G., Mirzаev J.I., Erkаbоev U.I., Yоqubjоnоv А.О.

Euroasian Journal of Semiconductors Science and Engineering

In this аrticle, mаthemаticаl mоdeling оf the prоcesses is cаrried оut using the experimentаl vаlues оf the cоntinuоus spectrum оf the density оf stаtes in twо-dimensiоnаl electrоn gаses, аnd the pоssibility оf cаlculаting discrete Lаndаu levels is shоwn. А theоry is prоpоsed fоr the temperаture dependence оf the оscillаtiоns оf the quаntum effect tаking intо аccоunt the thermаl brоаdening оf the Lаndаu levels in twо-dimensiоnаl semicоnductоr structures. Аn аnаlyticаl expressiоn is оbtаined fоr cаlculаting the effect оf pressure оn the Lаndаu levels оf electrоns in the cоnductiоn bаnd.

Calculation The Temperature Dependence The Energy Spectrum Of Charge Carriers In Semiconductors Exposed To A Strong Magnetic Field, Dadamirzayev M.G.

Euroasian Journal of Semiconductors Science and Engineering

The energy spectrum of free holes in a strong magnetic field is calculated for a non-quadratic dispersion law. The temperature dependence of the broadening of the Landau levels of holes in crystals with the Kane dispersion law has been studied. A new method for calculating the discrete energy spectrum in a quantizing magnetic field is proposed.

Effects Of Temperature And A Transversal Quantizing Magnetic Field On The Forbidden Band Of A Quantum Well, Sаyidоv N.А., Rаkhimоv R.G., Mirzaev J.I., Negmatov U.B.

Euroasian Journal of Semiconductors Science and Engineering

This article considers the temperature dependence of the band gap in quantum-well heterostructures in the presence of a transverse quantizing magnetic field. An analytical expression is obtained for determining the band gap of a rectangular quantum well at various magnetic fields and temperatures. The proposed formulas well explain the experimental results obtained for quantum-well semiconductor structures.

Determinаtiоn Оf Dependence Оf The Bаnd Gаp Оn Temperаture Аnd Quаntizing Mаgnetic Field In Electrоnic Semicоnductоrs With А Pаrаbоlic Dispersiоn Lаw, Erkаbоev U.I., Sаyidоv N.А., Rаkhimоv R.G., Mirzaev J.I.

Euroasian Journal of Semiconductors Science and Engineering

А new methоd is prоpоsed fоr cаlculаting the bаnd gаp in semicоnductоrs tаking intо аccоunt lаttice vibrаtiоns аnd thermаl smeаring under the influence оf temperаture аnd mаgnetic field. It is shоwn thаt the dependence оf the effective electrоn mаss оn energy аnd temperаture аffects the temperаture dependence оf the bаnd gаp in а strоng mаgnetic field. It is shоwn thаt, tо explаin the dependence оf the bаnd gаp, it is necessаry tо tаke intо аccоunt the cоntributiоn оf thermаl brоаdening оf energy levels. It wаs fоund thаt the tоtаl chаnge in the bаnd gаp is determined by bоth the interаctiоn …

Influence Of The Effective Mass Of The Density Of The State On The Temperature Dependence Of The Band Band Width In Solid Solutions P-Bi2-Xsbxte3-Ysey, Sharibaev N.Y., Dadamirzaev M.G., Sharifbaev R.N.

Euroasian Journal of Semiconductors Science and Engineering

The temperature dependence of the energy spectrum of semiconductors is well explained by the thermal broadening of discrete energy spectra. The temperature dependence of the band gap is considered as broadening of the energy states of the conduction and valence bands. In these works, it was assumed that the effective mass of the density of states does not depend on temperature. However, as experiments have shown, the effective mass of the density of states depends on temperature. These changes in the effective mass change the temperature dependence of the band gap.

Influence Оf А Strоng Mаgnetic Field Оn Fermi Energy Оscillаtiоns In Twо-Dimensiоnаl Semicоnductоr Mаteriаls, Erkаbоev U.I., Sаyidоv N.А., Rаkhimоv R.G., Mirzaev J.I.

Euroasian Journal of Semiconductors Science and Engineering

This article shows that the Fermi levels of a nanoscale semiconductor in a quantizing magnetic field are quantized. A method is proposed for calculating the Fermi energy oscillations for a two-dimensional electron gas at different magnetic fields and temperatures. An analytical expression is obtained for calculating the Fermi-Dirac distribution function at high temperatures and weak magnetic fields. With the help of the proposed formula, the experimental results in nanoscale semiconductor structures are investigated. Using formula, Fermi energy oscillations are explained for two-dimensional electron gases in quantum wells (quantum wells, mainly GaAs/GaAlAs heterostructures) with a parabolic dispersion law

Effects Of Temperature And A Transversal Quantizing Magnetic Field On The Forbidden Band Of A Quantum Well, Sаyidоv N.А., Rаkhimоv R.G., Mirzaev J.I., Negmatov U.B.

Euroasian Journal of Semiconductors Science and Engineering

This article considers the temperature dependence of the band gap in quantum-well heterostructures in the presence of a transverse quantizing magnetic field. An analytical expression is obtained for determining the band gap of a rectangular quantum well at various magnetic fields and temperatures. The proposed formulas well explain the experimental results obtained for quantum-well semiconductor structures.

Calculation Of Components Of Deformation Sensitivity Of Silicon Samples With Deep Impurity Levels, Khamidov R. Kh., Mamatkarimov O.

Euroasian Journal of Semiconductors Science and Engineering

In this paper presents that samples of silicon with acceptor impurities have a greater static and lower dynamic strain sensitivity than silicon samples with donor and amphoteric impurities. And samples of silicon with amphoteric impurities, almost does not have static components of strain sensitivity at pulse hydrostatic pressure. In such samples, the strain sensitivity is related only to the temperature and relaxation effects.

Temperature Dependence Of Active And Reactive Impedances Of Pmma-Ec-Litf2 / Mgtf2 Solid Polymer Electrolytes, Mamatkarimov O., Uktamaliyev B., Abdukarimov A., Arof A.K.

Euroasian Journal of Semiconductors Science and Engineering

In this work, PMMA-EC-LiTf2, PMMA-EC-MgTf2 samples were prepared at a concentration of 20%. Using Nyquist coordinates, results were obtained for active and reactive impedances at temperatures from 243K to 283 K and at temperatures from 303 K to 373 K. Rb from MgTf2 system are lower than LiTf2 in the room temperature. PMMA-EC-MgTf2 sample conductivity is 4.34∙10−51Ом∙см, PMMA-EC-LiTf2 sample conductivity is 3,07∙10−41Ом∙см

Navigation Service With Perspectives Of Digital Technology Developments In Maritime Sector, Hongzheng Zhang

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Safety Analysis Of Oog Cargo Stowage And Securing On Flat Rack, Zhendi Mu

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

The Influence Of The Covid-19 Pandemic On The Use Of Digital Technologies By Scientists: A Comparison Between Poland And Abroad, Jolanta Wartini-Twardowska, Dariusz Grabara, Ewa Wanda Ziemba

European Management Studies

Purpose: Our research was performed to identify differences in the frequency of using digital technologies by scientists to support their research in the periods before, during, and after the COVID-19 pandemic. Design/methodology/approach: A survey questionnaire was used and data were collected from 467 scientists from Poland and abroad, which were statistically analyzed. The non-parametric Kruskal–Wallis test was applied to reveal the differences in the frequency of digital technologies use between scientists in Poland and abroad in three periods (before, during, and after the COVID-19 pandemic). The non-parametric Friedman rank test and the post-hoc Conover test with Benjamini-Hochberg adjustment were used …

Digital Transformation Of Transportation In The Age Of Covid-19, Dorota Zimnoch

European Management Studies

Purpose: To highlight the key trends in the transportation industry and the role of emerging technologies and digital transformation in acceleration of value creation. The conceptual framework suggests how such transformation could be implemented. Design/methodology/approach: Research in a focus group was carried out where selected digital transformation frameworks were reviewed, and one was selected as the most applicable to the transportation industry. The selected framework was adopted for the transportation industry. Findings: 1. Value creation should be positioned as the key objective of transformation. 2. Digital transformation is not so much about technology as it is about people. 3. The …

Darq Technology As A Digital Transformation Strategy In Terms Of Global Crises, Jerzy Kisielnicki, Jan Zadrożny

European Management Studies

Purpose: The aim of the paper is (1) to analyze the DARQ (Distributed ledger, Artificial Intelligence, Extended Reality, Quantum Computing) technology in terms of its implementations and (2) to compare these technologies with the SMAC technology (Social, Mobile, Analytics, Cloud). We present the thesis that DARQ technologies can help in building information systems aimed at both predicting and monitoring global crises. We argue that the DARQ technology will support the management of network organizations in the first period of development. Design/methodology/approach: The research procedure consists of the following steps: literature analysis, conducting qualitative research and its presentation, obtaining expert opinions …

Cloud Communications During The Pandemic From The Perspective Of Collaboration Platforms, Joanna Kubacz-Szumska, Oskar Szumski

European Management Studies

Purpose: The aim of this research is focused on the identification of communication patterns prior and after COVID-19 was announced and the approach to the choices that end users make in various aspects of life. Design/methodology/approach: The authors decided to execute two-step research including practical use of 4 popular collaboration platforms: Microsoft Teams, Zoom, Jitsi, Google Meet, based on the proved user experience. After a defined focus group of respondents gathered hands-on experience in a controlled manner, using the defined communication platforms, further research was carried out in the form of a survey to assess the change of behavior of …

Integrated Erp-Class Management Information Systems – Evolution, Current State And Development Directions, Damian Dziembek

European Management Studies

Purpose: The aim of the article is to present the evolution of ERP systems and to identify the most important directions of ERP systems development. Design/methodology/approach: The paper uses the classical literature analysis method that consists in identifying the state of the research along with a critical reflection on it (critical literature review). Based on the analysis of the literature as well as the results of reports on ERP systems, suggestions for further development of ERP systems were formulated. Findings: The dynamic development of technology, increased competition in the IT market and changing needs of enterprises will result in the …

A Novel Missense Mutation In Tnni3k Causes Recessively Inherited Cardiac Conduction Disease In A Consanguineous Pakistani Family, Shafaq Ramzan, Stephanie Tennstedt Stephanie Tennstedt, Muhammad Tariq, Sheraz Khan, Hafiza Noor Ul Ayan, Aamir Ali, Matthias Munz, Holger Thiele, Asad Aslam Korejo, Shahid Mahmood Baig

Department of Biological & Biomedical Sciences

Cardiac conduction disease (CCD), which causes altered electrical impulse propagation in the heart, is a life-threatening condition with high morbidity and mortality. It exhibits genetic and clinical heterogeneity with diverse pathomechanisms, but in most cases, it disrupts the synchronous activity of impulse-generating nodes and impulse-conduction underlying the normal heartbeat. In this study, we investigated a consanguineous Pakistani family comprised of four patients with CCD. We applied whole exome sequencing (WES) and co-segregation analysis, which identified a novel homozygous missense mutation (c.1531T>C;(p.Ser511Pro)) in the highly conserved kinase domain of the cardiac troponin I-interacting kinase (TNNI3K) encoding gene. The behaviors of …

One Community. One Family., Eric F. Spina

President's Blog: From the Heart

"The future holds every possibility you hold in your hearts today," I told the class of 2025 at the New Student Convocation. "The journey begins now."

Encirclement Of Moving Targets Using Noisy Range And Bearing Measurements, Cammy Peterson, Puneet Jain, Randal Beard

Faculty Publications

This paper presents theoretically justified controllers that use relative range and bearing measurements to steer a team of autonomous vehicles, operating without inertial position information, to circular trajectories around a constant-acceleration, constant-velocity, or stationary target. An extended Kalman filter is used to improve the noisy relative measurements and estimate the velocity of the moving target. These estimated values are used in the control laws to encircle constant-velocity moving targets. Lyapunov techniques are utilized to show that the vehicle will converge to the desired circular formations. Additionally, cooperating vehicles are shown to converge to a circular formation with equal temporal spacing …

Construction Disputes And Associated Contractual Knowledge Discovery Using Unstructured Text-Heavy Data: Legal Cases In The United Kingdom, Jeehee Lee, Youngjib Ham, June-Seong Yi

Civil and Environmental Engineering and Construction Faculty Research

Construction disputes are one of the main challenges to successful construction projects. Most construction parties experience claims—and even worse, disputes—which are costly and time-consuming to resolve. Lessons learned from past failure cases can help reduce potential future risk factors that likely lead to disputes. In particular, case law, which has been accumulated from the past, is valuable information, providing useful insights to prepare for future disputes. However, few efforts have been made to discover legal knowledge using a large scale of case laws in the construction field. The aim of this paper is to enhance understanding of the multifaceted legal …

Active Attestation Of Embedded Systems, Mark M. Stephenson, Patrick A. Reber, Patrick J. Sweeney, Scott R. Graham

AFIT Patents

An active attestation apparatus verifies at runtime the integrity of untrusted machine code of an embedded system residing in a memory device while it is being run/used with while slowing the processing time less than other methods. The apparatus uses an integrated circuit chip containing a microcontroller and a reprogrammable logic device, such as a field programmable gate array (FPGA), to implement software attestation at runtime and in less time than is typically possible with comparable attestation approaches, while not requiring any halt of the processor in the microcontroller. The reprogrammable logic device includes functionality to load an encrypted version …

Identifying The Content And Context Of Pain Within Paediatric Rheumatology Healthcare Professional Curricula In The Uk: A Summative Content Analysis., Rebecca Rachael Lee, Janet E. Mcdonagh, Mark Connelly, Sarah Peters, Lis Cordingley

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND: The curriculum for professionals working in paediatric rheumatology should include pain but it is unclear to what extent this currently occurs. The aim of this study was to identify pain-related curriculum content and the context in which pain is presented in educational and training documentation for healthcare professionals in this clinical speciality.

METHODS: Core curricula documents from UK based professional organisations were identified in partnership with healthcare professionals. Documents were analysed using a summative content analysis approach. Key pain terms were quantified and weighted frequencies were used to explore narrative pain themes. Latent content was interpreted qualitatively to explore …

Peloton’S Ride To Growth, Christopher Winchester, Erin G. Pleggenkuhle-Miles, A. Erin Bass

Management Faculty Publications

Theoretical basis

The theoretical basis for this case is a focus on vertical integration, first-mover advantage and competitive dynamics. Vertical integration is based on Williamson’s (1979) theory of transaction-cost economics as it relates to vertical integration; the discussion on first-mover advantage is built off of Suarez and Lanzolla’s (2005) dynamics of first-mover advantage; and the analyzes on competitive dynamics derives from the MacMillan et al. (1985) early empirical tests of interfirm rivalry dynamics.

Research methodology

The authors conducted extensive research using the following sources: IBISWorld, MergentOnline and academic journals, trade magazines and websites. Additionally, the authors successfully piloted the case …

Analytical Model For Electromagnetic Induction In Pulsating Ferrofluid Pipe Flows, Huiyu Wang, John G. Monroe, Swati Kumari, Serhiy O. Leontsev, Erick S. Vasquez, Scott M. Thompson, Matthew J. Berg, Dibbon Keith Walters, Keisha B. Walters

Chemical and Materials Engineering Faculty Publications

No abstract provided.

The Relationship Between Student Engagement And Academic Performance In Online Education, Ievgeniia Kuzminykh, Bogdan Ghita, Hannan Xiao

School of Engineering, Computing and Mathematics

No abstract provided.

Earth Imaging From The Surface Of The Moon With A Dscovr/Epic-Type Camera, Nick Gorkavyi, Simon Carn, Matt Deland, Yuri Knyazikhin, Nick Krotkov, Alexander Marshak, Et Al.

Michigan Tech Publications

The Earth Polychromatic Imaging Camera (EPIC) on the Deep Space Climate Observatory (DSCOVR) satellite observes the entire Sun-illuminated Earth from sunrise to sunset from the L1 Sun-Earth Lagrange point. The L1 location, however, confines the observed phase angles to ∼2°–12°, a nearly backscattering direction, precluding any information on the bidirectional surface reflectance factor (BRF) or cloud/aerosol phase function. Deploying an analog of EPIC on the Moon’s surface would offer a unique opportunity to image the full range of Earth phases, including observing ocean/cloud glint reflection for different phase angles; monitoring of transient volcanic clouds; detection of circum-polar mesospheric and stratospheric …