bluuebunny/crossref_metadata_2025 huggingface dataset:
The simulation of proton beam passage through thin gold films
Authors: Babenko P. Yu.  , Zinoviev A. N.  , Tensin D.S.
Published: March 2023

The results of calculating the energy spectra of protons transmitted and reflected from thin layers of gold are presented. The simulation results are compared with experimental data. It is shown that the stopping measurement results are affected by such factors as the multiple scattering, the geometry of the experiment, and the morphology and roughness of the target. An analysis of the angular dependence for particles passing through a thin film makes it possible to obtain information about the interaction potential between a particle and a solid. The obtained results on the potential agree with the data from experiments on the reflection of particles from the surface of a solid and differ markedly from the data on the potential determined from the scattering of particles in the gas phase. Keywords: energy spectra, angular distribution, interatomic interaction potentials, electronic stopping, straggling.
Non-covalent structures of negative ions formed during the dissociative capture of electrons by molecules
Authors: N. L. Asfandiarov  , M. V. Muftakhov  , A. M. Safronov  , R.V. Galeev  , S. A. Pshenichnyuk
Published: March 2023

The method of dissociative electron attachment (DEA) spectroscopy was used to study the attachment of electrons to 1-chloronaphthalene molecules. It has been established that the dominant channel for the decay of molecular ions is the formation of Cl- ions in three resonances at 0.7, 1.5, and 3.0 eV. Ions [M-H]- and [M-Cl]- are observed at energies from 3.5 to 8.5 eV and have two to three orders of magnitude lower formation cross sections. Long-lived molecular ions were not registered. Calculations in the DFT CAM B3LYP/6-311+G(d,p) approximation predict the presence of six stable anionic structures in which the chlorine anion is coordinated to the neutral residue via noncovalent H-Cl^--H bonds. The electron affinity of the most stable of these structures coincides with the experimentally measured value EA_a=0.2771±0.003 eV. These results agree with the previously obtained data on the DEA of molecules of bromine-substituted biphenyls, naphthalenes, and anthracenes and confirm the existence of anionic structures with non-covalent H-Hal-H bonds. Such non-covalent anion structures should be extremely reactive, which makes them promising for the synthesis of self-assembling hydrocarbon nanomembranes. Keywords: Attachment of electrons to molecules, electron affinity, potential surface, DFT calculations.
Study of the Effect of a Small Addition of ZrO-=SUB=-2-=/SUB=- on the Density and Grain Growth of Alumina
Authors: Boldin M. S.  , Popov A. A.  , Murashov A. A.  , Sakharov S. V.  , Shotin S.V.  , Nokhrin A. V.  , Chuvil’deev V. N.  , Tabachkova N. Yu.  , Smetanina K. E.
Published: March 2023

The effect of an additive of 0.5 wt.% of zirconium oxide on the spark plasma sintering (SPS) kinetics of alumina powders has been studied. Ceramics were obtained by mixing alumina powders in a planetary mill with grinding media from stabilized zirconium oxide. The activation energy of SPS was estimated using the Young-Cutler model. It has been shown that the density and average grain size in ceramics obtained from submicron alumina powders are significantly affected by the nonequilibrium state of the interfaces formed as a result of the transformation of the amorphous phase present on the alumina powder particle surface. The grain size and density of ceramics obtained from fine powders are significantly affected by the coalescence of ZrO2 particles. Keywords: Alumina, zirconium oxide, spark plasma sintering, density, diffusion, activation energy.
Change in the surface state of the single-crystal germanium as a result of implantation with silver ions and annealing with light pulses
Authors: Gavrilova T. P.  , Farrakhov B.F.  , Fattakhov Ya.V.  , Khantimerov S. M.  , Nuzhdin V. I.  , Rogov A. M.  , Valeev V. F.  , Konovalov D.A.  , Stepanov A. L.
Published: March 2023

Single-crystal c-Ge plates implanted with Ag+ ions with an energy of E=30 keV, current density of the ion beam J = 5 μA/cm2 and a dose of D = 2.5· 1016 ion/cm2 were subjected to rapid thermal annealing by single light pulses of various durations from 1 up to 9.5 s. By scanning electron microscopy and optical reflection spectroscopy measurements it was shown that after ion implantation an amorphous porous Ag : PGe layer of spongy structure, consisting of Ge nanowires, is formed on the surface of c-Ge substrates. It was found that the annealing with an increase in the pulse duration up to 5 s successively leads to an increase in the Ge nanowire diameters from 26 to 35 nm. With longer pulses, the porous Ag : PGe structure is destroyed and Ag evaporates from the implanted layers. Keywords: nanoporous germanium, ion implantation, rapid thermal annealing.
Josephson effect in nanographite films
Authors: Lebedev S.G.
Published: March 2023

In nanographite films, for the first time the Josephson current at room temperature has been obtained when measuring the current-voltage characteristics. Sach measurement confirms the earlier observations in nanographite film the effects of weak superconductivity: zeroing of the temperature dependence at 650 K of constant voltage on the sample when it exposed to an alternating microwave voltage due to the inverse Josephson effect, as well as the observation of local areas with the structure of magnetic vortices in a magnetic force microscope at room temperature. The resulting critical current value of 0.8 μA is significantly lower than expected values for the superconducting gap, as well as for pinning at the Bean--Levingston barrier. The measures for increasing the critical current is proposed. Keywords: Josephson effect, nanographite film, superconductivity, room temperature.
Preferential sputtering of alloys by gas cluster ions
Authors: Chernysh V. S.  , Ieshkin A. E.  , Kireev D. S.  , Minnebaev D. K.  , Skryleva E. A.  , Senatulin B. R.
Published: March 2023

Topography and composition of the surface of nickel-based alloys under irradiation with Ar2500+ cluster ions with the energy of 20 keV, and atomic Ar+ ions with the energy of 3 keV have been studied. It has been experimentally found that the surface of the alloys is depleted by a component with a lower binding energy. It is shown that the change in the surface concentrations of the alloy components upon irradiation with cluster ions is an order of magnitude greater than upon sputtering with atomic ions. The degree of change in the surface composition is determined by the ratio of the sputtering yields of the alloy components. Keywords: gas cluster ions, ion sputtering, XPS, preferential sputtering, surface topography.
Gettering properties of nickel in silicon photocells
Authors: Bakhadirkhanov M.K.  , Kenzhaev Z. T.  , Turekeev Kh. S.  , Isakov B.О .  , Usmonov A.A.
Published: March 2023

The effect of doping with nickel on the parameters of silicon photocells, in which the p-n- junction was created by impurities of III (B, Ga) and V (P, Sb) groups, has been studied. It is shown that the positive effect of nickel on the photocell efficiency does not depend on the type of initial silicon and on the nature of impurities used to obtain the p-n- junction, but is mainly determined by the gettering properties of the near-surface nickel-enriched layer Keywords: photocell, silicon, nickel, thermal annealing, clusters, lifetime, gettering, recombination centers.
Current Characteristics of a High-Current Electron Gun with Multi-Gap Initiation of Explosive Emission by Dielectric Surface Flashover
Authors: Petrov V.I.  , Kiziridi P.P.  , Ozur G.E.
Published: March 2023

Current characteristics of a plasma-filled, high-current electron gun at different accelerating voltages and densities of plasma preliminary filling the space between the cahode and collector have been investigated. Multi-gap initiation of explosive emission is performed with the use of parallel operated, resistively decoupled arc plasma sources which electrodes and tube ceramic isolators are built-in to the explosive-emission cathode. Experiments have demonstrated operability of high-current electron gun with a new cathode assembly at accelerating voltage up to 30 kV and its good emissivity (average in area current density) which was approximately 1.4-2.4times higher than an emissivity of traditional electron gun with plasma anode and multi-wire copper cathode. Keywords: high-current electron beams, explosive emission, cathode assembly, multi-gap initiation, dielectric surface flashover.
Bioimpedance analysis of the patient's superficial tissues
Authors: Rybyanets A. N.  , Shvetsov I. A.  , Shvetsova N. A.  , Reznichenko A. N.  , Kolpacheva N. A.
Published: March 2023

A new method for analyzing physiological conditions of the patient's superficial tissues in vivo is proposed. Precision measurements of the complex electrical resistance were performed using the bioimpedance spectroscopy method. The design of a diagnostic module for complex non-invasive diagnostics of the physiological condition and processes in the surface tissues of a patient has been developed. An experimental verification of the developed method of bioimpedance spectroscopy was carried out on reference solutions and patient's superficial tissues in vivo. A biophysical interpretation of the obtained results is proposed. Keywords: bioelectrical impedance analysis, bioimpedance spectroscopy, superficial tissues, diagnostic module, cell membranes, intracellular fluid.
Atomic single bubble sonoluminescence of ytterbium in a colloidal suspension
Authors: Gareev B. M.  , Abdrakhmanov A. M.  , Sharipov G. L.
Published: March 2023

For the first time, atomic single-bubble sonoluminescence of Yb in a colloidal suspension in dodecane of SiO2 nanoparticles containing YbCl3 was recorded. A spectrum was obtained containing Yb, Yb+ lines in the region of 300-550 nm, together with SiO lines, due to the entry of nanoparticles into the bubble during sonolysis of the suspension. The lower limit of determination of ytterbium in the initial aqueous solution of YbCl3 used for depositing onto nanoparticles, according to the intensity of the analytical line at 399 nm in this spectrum, is 3·10-3 mol/l. By comparing the experimental and temperature-dependent calculated spectra of ytterbium, we found the electronic temperature in the nonequilibrium plasma that arises during bubble collapse, where Yb atoms emit light: Te=7000± 500 K. Keywords: single-bubble sonoluminescence, silicon dioxide, ytterbium, colloidal suspension.
Fiber Optic Long Baseline Deformometer for Pit Wall Rock Monitoring System
Authors: Mekhtiyev A. D.  , Yurchenko A. V.  , Kalytka V. A.  , Neshina Ye. G.  , Alkina A. D.  , Madi P. S.
Published: March 2023

A fiber-optic long-base deformometer has been developed, which can be used in rock monitoring systems for open pit walls. The proposed deformometer is based on the method of controlling the additional losses of a light wave propagating in an optical fiber. The fiber optic sensor has a fairly high linearity and stability of the output signal, and is also not subject to the negative occurrence of fading inherent in fiber optic sensors based on the Mach-Zehnder interferometer, with fluctuations in ambient temperature and the appearance of false signals about the displacement of rocks. Keywords: deformometer, interferometer, monitoring system, optical fiber.
MBE growth of InGaN nanowires on SiC/Si(111) and Si(111) substrates: comparative analysis
Authors: Gridchin V. O.  , Reznik R. R.  , Kotlyar K. P.  , Dragunova A. S.  , Kryzhanovskaya N. V.  , Serov A. Yu.  , Kukushkin S. A.  , Cirlin G. E.
Published: March 2023

In this work, InGaN nanowires with a high In content were grown, for the first time on hybrid SiC/Si substrates and compared with InGaN nanowires grown on Si. It was shown that InGaN nanowires on SiC/Si have lower indium content (by about 10%) compared to the nanowires on Si. The results can be beneficial for studying the growth mechanisms of InGaN nanowires and creating optoelectronic devices in the visible spectral range. Keywords: InGaN, nanowires, molecular beam epitaxy, SiC/Si, morphological properties, optical properties, miscibility gap, silicon carbide on silicon
A Digital Self-help Intervention for Atopic Dermatitis: Analysis of Secondary Outcomes From a Feasibility Study
Authors: Kern Dorian , Ljótsson Brjánn , Lönndahl Louise , Hedman-Lagerlöf Erik , Bradley Maria , Lindefors Nils , Kraepelien Martin
Published: March 2023

Background

Atopic dermatitis (AD) is a common inflammatory skin disease characterized by dry skin, eczematous lesions, and an often severe pruritus. The disease may have a negative effect on quality of life and is also associated with symptoms of anxiety and depression. Few individuals with AD receive any form of behavioral intervention. Behavioral interventions for AD are potentially efficacious but need to be constructed so that they are safe, credible, and user-friendly. We have previously reported on a feasibility study that demonstrated that a self-management version of a digital intervention based on cognitive behavioral therapy (CBT) for AD can potentially be effective in reducing AD symptoms. The aim of this secondary report was to further examine treatment feasibility and preliminary effects on dermatological quality of life, itching sensations, depressive symptoms, and perceived stress.

Objective

This is a secondary report on intervention credibility, usability, adverse events, and preliminary effects on secondary measures of a self-management digital intervention for atopic dermatitis.

Methods

In total, 21 adults with AD, recruited nationwide in Sweden, were assessed by telephone, and used the digital intervention for 8 weeks. Participants were also assessed directly afterward and 3 months after the end of the intervention. There was no therapist guidance. Feasibility indicators included intervention credibility, usability, and possible adverse effects. Other measures included preliminary effects on dermatological quality of life, itching sensations, depressive symptoms, and perceived stress.

Results

The intervention was regarded as credible and no serious adverse events were reported. System usability was, however, found to be below the predetermined cutoff for acceptable usability. Preliminary effects at 3-month follow-up were in the moderate to large range for dermatological quality of life (Cohen d=0.89, 95% CI 0.18-1.56), itching sensations (Cohen d=0.85, 95% CI 0.15-1.52), depressive symptoms (Cohen d=0.78, 95% CI 0.1-1.45), and perceived stress (Cohen d=0.75, 95% CI 0.01-1.36).

Conclusions

This 8-week self-management digital CBT-based intervention was, together with telephone calls before and after, a feasible intervention for participants with AD. Preliminary effects were promising and should be explored further in a randomized controlled trial. Intervention usability was, however, rated below cutoff scores. Efforts should be made to improve written material to increase usability.
Using Wearable Technology to Quantify Physical Activity Recovery: Secondary Report From the AFTER (App-Facilitated Tele-Rehabilitation) Program for COVID-19 Survivors Randomized Study
Authors: Churchill Laura , Morrow Mary , Capin Jacob J , Jolley Sarah E , Hare Kristine , MaWhinney Samantha , Stevens-Lapsley Jennifer E , Erlandson Kristine M
Published: March 2023

Background

Knowledge on physical activity recovery after COVID-19 survival is limited. The AFTER (App-Facilitated Tele-Rehabilitation) program for COVID-19 survivors randomized participants, following hospital discharge, to either education and unstructured physical activity or a telerehabilitation program. Step count data were collected as a secondary outcome, and we found no significant differences in total step count trajectories between groups at 6 weeks. Further step count data were not analyzed.

Objective

The purpose of this analysis was to examine step count trajectories and correlates among all participants (combined into a single group) across the 12-week study period.

Methods

Linear mixed models with random effects were used to model daily steps over the number of study days. Models with 0, 1, and 2 inflection points were considered, and the final model was selected based on the highest log-likelihood value.

Results

Participants included 44 adults (41 with available Fitbit [Fitbit LLC] data). Initially, step counts increased by an average of 930 (95% CI 547-1312; P<.001) steps per week, culminating in an average daily step count of 7658 (95% CI 6257-9059; P<.001) at the end of week 3. During the remaining 9 weeks of the study, weekly step counts increased by an average of 67 (95% CI −30 to 163; P<.001) steps per week, resulting in a final estimate of 8258 (95% CI 6933-9584; P<.001) steps.

Conclusions

Participants showed a marked improvement in daily step counts during the first 3 weeks of the study, followed by more gradual improvement in the remaining 9 weeks. Physical activity data and step count recovery trajectories may be considered surrogates for physiological recovery, although further research is needed to examine this relationship.

Trial Registration

ClinicalTrials.gov NCT04663945; https://tinyurl.com/2p969ced
General Practitioners’ Experiences With Potentials and Pitfalls of Video Consultations in Norway During the COVID-19 Lockdown: Qualitative Analysis of Free-Text Survey Answers
Authors: Norberg Børge Lønnebakke , Getz Linn Okkenhaug , Johnsen Tor Magne , Austad Bjarne , Zanaboni Paolo
Published: March 2023

Background

The use of video consultations (VCs) in Norwegian general practice rapidly increased during the COVID-19 pandemic. During societal lockdowns, VCs were used for nearly all types of clinical problems, as in-person consultations were kept to a minimum.

Objective

This study aimed to explore general practitioners’ (GPs’) experiences of potentials and pitfalls associated with the use of VCs during the first pandemic lockdown.

Methods

Between April 14 and May 3, 2020, all regular Norwegian GPs (N=4858) were invited to answer a web-based survey, which included open-ended questions about their experiences with the advantages and pitfalls of VCs. A total of 2558 free-text answers were provided by 657 of the 1237 GPs who participated in the survey. The material was subjected to reflexive thematic analysis.

Results

Four main themes were identified. First, VCs are described as being particularly convenient, informative, and effective for consultations with previously known patients. Second, strategically planned VCs may facilitate effective tailoring of clinical trajectories that optimize clinical workflow. VCs allow for an initial overview of the problem (triage), follow-up evaluation after an in-person consultation, provision of advice and information concerning test results and discharge notes, extension of sick leaves, and delivery of other medical certificates. VCs may, in certain situations, enhance the GPs’ insight in their patients’ relational and socioeconomical resources and vulnerabilities, and even facilitate relationship-building with patients in need of care who might otherwise be reluctant to seek help. Third, VCs are characterized by a demarcated communication style and the “one problem approach,” which may entail effectiveness in the short run. However, the web-based communication climate implies degradation of valuable nonverbal signals that are more evidently present in in-person consultations. Finally, overreliance on VCs may, in a longer perspective, undermine the establishment and maintenance of relational trust, with a negative impact on the quality of care and patient safety. Compensatory mechanisms include clarifying with the patient what the next step is, answering any questions and giving further advice on treatment if conditions do not improve or there is a need for follow-up. Participation of family members can also be helpful to improve reciprocal understanding and safety.

Conclusions

The findings have relevance for future implementation of VCs and deserve further exploration under less stressful circumstances.
The complex influence of the combination of the BDNF (rs6265), VDR (rs2228570), and NMDA (rs4880213) genotypes on the development of cognitive disorders in patients with autoimmune thyroiditis andhypothyroidism
Authors: Kamyshna I. , Pavlovych L. , Pankiv I. , Pankiv V. , Maslyanko V. , Bytsko N. , Kamyshnyi A.
Published: March 2023

Background. Numerous studies have demonstrated that thyroid conditions can affect cognitive function. Gene polymorphisms associated with pathology of the endocrine and nervous system have ethnic and population specificity, which determines the need to study them in a certain region. The purpose of the study was to investigate the combined impact of the BDNF (rs6265), VDR (rs2228570), and NMDA (rs4880213) gene polymorphisms on cognitive impairment in patients with autoimmune thyroiditis and hypothyroidism among the population of Western regions of Ukraine, and to predict the onset of cognitive disorders. Materials and methods. The study involved a total of 153 patients with autoimmune thyroiditis and hypothyroidism. Genotyping of the VDR (rs2228570), BDNF (rs6265), and NMDA (rs4880213) gene polymorphism using TaqMan probes and TaqMan Genotyping Master Mix (4371355) was performed on CFX96™ Real-Time PCR Detection System (Bio-Rad Laboratories, Inc., USA). Polymerase chain reaction for TaqMan genotyping was carried out according to the kit instructions (Applied Biosystems, USA). We detect a decline in cognitive function using the Mini-Mental State Examination. Results. Carrying a combination of CC/AG/CC genotypes significantly reduces the risk of developing cognitive impairment (odds ratio (OR)=0.1410; 95% confidence interval (CI) 0.0181–1.0965; p=0.0416). At the same time, carrying a combination of CT/AG/CT genotypes increases the risk of cognitive impairment by more than 5 times (OR=5.1915; 95% CI 1.2471–21.6107; p=0.0214) and a combination of CT/AG/TT genotypes — by 10 times (OR=10.1224; 95% CI 1.1037–92.8401; p=0.0281). Carriers of the CT/AA/CT genotype combination have a 6.4-fold increased risk of cognitive impairment (OR=6.4062; 95% CI 1.2019–34.1471; p=0.0253). Conclusions. Among patients with autoimmune thyroiditis and hypothyroidism, carriers of the CC/AG/CC genotype combination of the BDNF (rs6265), VDR (rs2228570) and NMDA (rs4880213) genes have a reduced risk of developing cognitive disorders, while carriers of the CT/AG/CT, CT/AG/TT and CT/AA/CT have an increased risk of cognitive impairment.
Developing a Scale to Measure Sense of Resistance to Azatoi Behavior
Authors: Kawatsu Yuki , Kato Daiki
Published: March 2023

The main purpose of the present study is to develop a scale measuring the sense of resistance to azatoi behavior in female Japanese university students. The participants in this study were 114 Japanese female university students and 18 items were rated. First, the factor structure of the Azatoi Behavior Resistance Scale (ABRS) was investigated using exploratory factor analysis. Then, the validity of the structure was examined using confirmatory factor analysis. The result of the analysis showed that the fit indices indicated the best fit for the four-factor model, and the four factors were gesture, physical contact, adjustment, and typical behavior.
DEVELOPMENT AND EVALUATION OF ANTIDIABETIC POLYHERBAL TABLET USING MEDICINAL PLANTS OF TRADITIONAL USE
Authors: KOLHE ROHINI C. , CHAUDHARI RAJESH Y.
Published: March 2023

The aim of the present study is to develop and evaluate polyherbal tablet prepared for the management of diabetes with enhanced disintegration time. The polyherbal extract prepared using methanolic extract of selected traditionally used medicinal plants such as Adenanthera pavonina, Kigelia africana, Parkia biglandulosa and Syzygium jambose (1:1:1:2) was evaluated in      alloxan monohydrate induced diabetic rat model. The polyherbal tablets were prepared by wet granulation method with excipients microcrystalline cellulose; dicalcium phosphate dehydrate and sodium starch glycolate. After preformulation studies, tablets were evaluated by using weight variation, hardness, friability and disintegration time. The diabetic rats treated with polyherbal extract were compared with the diabetic control rats group. Positive results were obtained in the observed parameters, thus favoring the use of the plants. Pre-formulation study revealed that all the evaluated parameters were found to be within acceptable limits. The weight variation of the formulated tablets was 1.43 % RSD. The disintegration time of the formulations was found to be 9.50 min. The tablets also underwent accelerated stability over the period of three months. No marked changes were observed in all the parameters evaluated during three months of accelerated stability study. Laboratory-scale preparation of polyherbal tablet can lead to new powerful and stable oral dosage formulations for diabetes mellitus and lighten the synergistic area of ​​action of herbs.
A Literature Survey on Applications of 5G Technologies for Water Resource Management
Authors: Kadam Saurabh Machhindra , Solanki Pratap Singh
Published: March 2023

Abstract: Information and Communication Technology (ICT) has become the integral part of our everyday life. ICT has been playing vital and essential role in all modern and advance field. ICT covers computing, communication, information accessing, processing and transmitting the same with high security. In addition to increased network capacity requirements to handle a large number of devices running apps that need high data rates and always-on access, 5G can provide high speeds, low latency, and more capacity with the potential to change what we have experienced with our mobile device. This will be extremely beneficial to the emerging business models in the wireless network market that call for networks to be more open. The location, administration, and operation of upcoming 5G wireless networks will differ from those of present wireless networks due to new obstacles that call for new solutions and include revised planning. 5G wireless networks will have among their main goals the compliance provision of service-tailored networks to a wide range of services employing integrated cloud reserves and wireless and wired network assets, which may be offered by various infrastructure suppliers and/or operators.
Path Finder Autonomous Robot
Authors: Salavi Prof. A S , Bhosale Prof. D A
Published: March 2023

Abstract: Now a days many robots have come Developed for automation and navigation is robotics Emerging technologies that reduce human work. Many A variety of robot navigation techniques are available. This is a project to create a robot that finds the world safe way Plan and avoid obstacles. It has an infrared sensor Used to detect obstacles in the robot's path. Robot avoid the obstacles in the way and move forward specific direction. An infrared sensor is used for detection Interrupt and send the information to the controller and then Processing input microcontroller redirects using robots Motors that are controlled by motor drivers.
E-SERVICE BANCÁRIO: UM ESTUDO SOBRE A QUALIDADE DO SERVIÇO BANCÁRIO DIGITAL DURANTE A PANDEMIA DO COVID-19
Authors: Leão Airton Pereira da Silva , Da Silva Sousa Talia
Published: March 2023

Objetivo: Esta pesquisa tem por objetivo analisar a percepção de qualidade do e-service bancário. Para isso, foi proposto um modelo teórico utilizando construtos adaptados e validados da qualidade do e-service bancário, a partir do conjunto de três variáveis: segurança, facilidade de uso e eficiência.
Método/abordagem: Pesquisa quantitativa descritiva de corte transversal, através da coleta de dados primários via google formulários. O questionário obteve a quantidade de 367 respostas, nas quais 348 foram válidas. Para a análise dos dados foi utilizado a técnica de Modelagem de Equações Estruturais (MEE) e os resultados revelaram que a segurança, facilidade de uso e eficiência têm efeito positivo na qualidade do e-service. Além disso, foi testada a variável inovação e constatado que a mesma possui influência na qualidade e satisfação do e-service bancário.
Principais Resultados: Os resultados revelam que os construtos influenciam positivamente a qualidade do e-service e reforçam a importância da inovação em serviços bancários online, que permitam ao cliente, mais agilidade, eficiência e segurança em transações bancárias.
Contribuições teóricas/práticas/sociais: Como contribuição teórica, este trabalho testou a escala ServQual no e-service adaptada para o mercado brasileiro. Com relação às práticas gerenciais, esta pesquisa contribuirá para os bancos que utilizam o e-service bancário, uma vez que estes constroem suas estratégias pautadas no serviço digital.
Originalidade/relevância: O presente estudo inova em testar escala ServQual no e-service adaptada para o mercado brasileiro. Como também na realização da análise, a inserção da inovação como moderador na percepção de qualidade e satisfação no serviço bancário digital.
Optimal (controlled) quantum state preparation and improved unitary synthesis by quantum circuits with any number of ancillary qubits
Authors: Yuan Pei , Zhang Shengyu
Published: March 2023

As a cornerstone for many quantum linear algebraic and quantum machine learning algorithms, controlled quantum state preparation (CQSP) aims to provide the transformation of |i⟩|0n⟩→|i⟩|ψi⟩ for all i∈{0,1}k for the given n-qubit states |ψi⟩. In this paper, we construct a quantum circuit for implementing CQSP, with depth O(n+k+2n+kn+k+m) and size O(2n+k) for any given number m of ancillary qubits. These bounds, which can also be viewed as a time-space tradeoff for the transformation, are optimal for any integer parameters m,k≥0 and n≥1. When k=0, the problem becomes the canonical quantum state preparation (QSP) problem with ancillary qubits, which asks for efficient implementations of the transformation |0n⟩|0m⟩→|ψ⟩|0m⟩. This problem has many applications with many investigations, yet its circuit complexity remains open. Our construction completely solves this problem, pinning down its depth complexity to Θ(n+2n/(n+m)) and its size complexity to Θ(2n) for any m. Another fundamental problem, unitary synthesis, asks to implement a general n-qubit unitary by a quantum circuit. Previous work shows a lower bound of Ω(n+4n/(n+m)) and an upper bound of O(n2n) for m=Ω(2n/n) ancillary qubits. In this paper, we quadratically shrink this gap by presenting a quantum circuit of the depth of O(n2n/2+n1/223n/2m1/2  ).
Органик полимер нарны элементийн А.Ү.К-ийг сайжруулах боломжиийн судалгаа
Authors: Ц Нямаа , Т Болорцэцэг , Н Төвжаргал , Алата  , Алтанбулаг  , Ж Даваасамбуу
Published: March 2023

Бид энэ ажлаар P3HT/PCBM (poly(3-hexylthiophene) 1-(3-methoxycarbonyl) propyl-1-phenyl-methanofullerene) холимог полимер материалд суурилсан органик нарны элементийн ашигт үйлийн коэффициент (А.Ү.К)-ийг сайжруулах судалгааг түүний идэвхт давхарга P3HT/PCBM-ийг тогтоож хатаах горимоос хамааруулан судлав. Эндээс идэвхт давхаргын гэрлийн шингээлт, гадаргуун морфологи, кристалжилт нь идэвхт давхарга тогтоох хугацаа болон дулааны боловсруулалтын горимоос хамааран хэрхэн өөрчлөгдөж байгааг үзүүлэв. Хамгийн сайн үр дүн үзүүлсэн дээжүүдээ ашиглан нарны элемент хийж түүний А.Ү.К-ийг хэмжив. Идэвхт гадаргууг богино хугацаанд суулгаж хатаагаад, дараа нь шаталсан горимоор халааж боловсруулсан идэвхт давхарга бүхий нарны элементийн үр ашиг нэмэгдэж байгааг үзүүлэв.
Утааны механик шинж чанарыг судлах хялбар арга
Authors: Ж Ванчинхүү , Ж Даваасамбуу , Б Бат-Эрдэнэ
Published: March 2023

Утааны бөөмцөрийн шугаман хэмжээ, тоон нягт буюу концентраци, хурд, бөөмцөр хоорондын зай, утаан дахь бөөмцөрийн концентраци зэрэг зарим механик чанарыг хялбар тодорхойлох боломжит арга, аргачлалыг энд судлав. Энд  дэвшүүлж байгаа аргыг ашиглан тамхины утааны зарим механик шинж чанарыг тогтоож агаар мандал руу орж байгаа эмиссийг үнэлэв. Агаарын бохирдлын судалгааны тохиромжтой байх зарим шинэ параметрүүдийг дэвшүүлэн гаргасан.
Улаанбаатар хот орчмын агаар мандлын бохирдлын оптик параметрүүдийг өвлийн улиралд болон түймрийн утаатай байх хугацаанд харьцуулан судалсан дүн
Authors: Б Ганбат , Ц Баатарчулуун , Т Нарангарав , Б Даариймаа
Published: March 2023

Энэхүү судалгааны ажлаар өвлийн улиралд биомасс шатаасны улмаас үүсэх утаатай үед болон зуны улиралд ойн түймрийн утаатай байх үед Улаанбаатар хот орчмын агаар мандлын бохирдлын оптик параметрүүдийг тодорхойлж, тэдгээрийг харьцуулан судалж, зүй тогтлыг тайлбарлах оролдлого хийлээ.
Улаанбаатар хотын агаар дахь радоны хэмжилт
Authors: Б Булгансайхан , Н Норов
Published: March 2023

Улаанбаатар хотын нийт 260 гаруй цэгээс тодорхой аргачлалын дагуу агаарын дээж авч агаар дахь цацраг идэвхит радоны агуулгыг тодорхойллоо. Агаар дахь радоны агуулга нь Улаанбаатар хотын баруун болон хойд хэсгүүдээр илүү өндөр үзүүлэлттэй байна. Нийт хэмжилтийн дүнгээс харахад Нийслэлийн гаднах агаар дахь радоны дундаж хэмжээ 8.3 Бк/м3 байна. Үүнийг Дэлхийн дундаж үзүүлэлт болох 5 Бк/м3-тай харьцуулахад 1.9 дахин их байна.
Mg0.9Ca0.1Fe2O4 нэгдлийн гарган авах арга ба түүний соронзон шинж чанарт үзүүлэх нөлөө
Authors: Feng Chun , Н Цогбадрах , О Төгс , Хашчулуун  , Д Сангаа
Published: March 2023

Хатуу төлөвийн урвалын аргаар Mg0.9Ca0.1Fe2O4 феррит материалыг гарган авч,түүний бүтэц, цэвэршилтийг рентген дифракцын аргаар, соронзон шинж чанарыгмагнетометр ашиглан судлав. Түүнчлэн хувьсах соронзон орны нөлөөгөөр дээжээсялгарах дулааны хэмжээг дээж гарган авах горим, дулааны боловсруулалтаасхамааруулан тодорхойлов. Дээж гарган авах туршилтаас харахад 8 цаг тээрэмдэж,огцом хөргөх замаар гарган авсан дээж дан куб шпинел бүтэцтэй, кристаллынмөхлөгийн хэмжээ харьцангуй том, ханалтын соронзон момент ба хувьсах соронзоноронд дулаан ялгаруулах чанар нь цэвэр магни феррит (MgFe2O4) нэгдэлээс илүүболохыг үзүүлэв. Энд 8 цаг тээрэмдсэн дээжийг огцом хөргөхөд ханалтын соронзонмомент Ms нь 14.22 -аас 25.70 Ам2/кг болж, үлдэгдэл соронзон момент Mr нь 7.68–аас10.16 Ам2/кг болж нэмэгдэж байна. Соронзон албадлага Hc нь дээжийг хөргөхгоримоос хамаарахгүй 192 Oe байна. Хувьсах соронзон орны нөлөөгөөр дээжийнялгаруулах дулааныг хэмжихэд Δt=50оС температурын өөрчлөлт үүсгэх хугацаааяндаа хөргөхөд 122.4 секунд байсан бол огцом хөргөхөд 106.4 секунд болжөөрчлөгдөж байна. Энэ нь дээж гарган авах дулааны боловсруулалтын горимыгөөрчлөх замаар соронзон чанарыг сайжруулж, хувьсах соронзон орны нөлөөгөөрялгарах дулааны шинж чанарыг нэмэгдүүлж болохыг харуулж байна.
Nd2Fe14B соронзон материал гарган авах судалгаа
Authors: Н Төвжаргал , М Отгонбаатар , Ж Даваасамбуу , О Төгс
Published: March 2023

Бид энэ ажлаар Nd2Fe14B соронзон материалыг төмөр (Fe), неодум (Nd), бор (B)-ийн цэвэр нунтаг дээжийг 2:14:1 атомын харьцаатайгаар шууд холих замаар өндөр температурт хайлуулж нэгтгээд дулааны боловсруулалтад оруулж, огцом хөргөх арга ашиглан гарган авах ажлыг хийж гүйцэтгэв. Туршилтын үр дүнгээс үзэхэд эхлээд хольж хайлуулсан хайлш нь дээж бэлтгэл болон боловсруулалтын явцад агаар, орчны нөлөөгөөр исэлдэж неодим оксид (Nd2O3) давамгайлсан фазууд үүссэн байна. Үүнийг инертийн хийн орчинд битүүмжилж дулааны боловсруулалтад оруулж, огцом хөргөсний дараа Nd2Fe14B-ийн хайлш болж байгаа нь рентген бүтцийн анализын үр дүнгээс харагдаж байна. Цаашид Nd2Fe14B-ийн хайлшийг цэврээр кристалжилт сайтай гарган авах болон хүчтэй соронзон ашиглаж соронзжуулах ажлыг хийж гүйцэтгэх шаардлагатай.
Газрын гадаргуугийн хэлбэр бүрэлдэхэд гранитын биетүүдийн оролцоо
Authors: Н Арвисбаатар , Ц Баатарчулуун , Б Бат , Б Жавзандолгор , Б Даариймаа , Т Нарангарав
Published: March 2023

Гадаргуугийн эерэг хэлбэр үүсгэн, интрүзивийн царцсаны дараа агуулагч чулуулгийгнэвтлэх гранитын цулдалын хөөрөлтийн динамикийг судлав. Гранитын талсжилтындараа түүгээр тогтсон томоохон биетүүд Архимедийн хүчний үйлчлэлээр дээшлэххөдөлгөөнөө үргэлжлүүлэх болно. Тухайн хөдөлгөөний хурд интрүзийн оройнхэсгийн өсөлтөөр экспоненциал хуулиар буурах авч удаан хугацаагаар тэрээр хатууурсацын хэмжээгээр үнэлэгдэх денудацийн хурдаас илүү хэвээр үлдэнэ. Үүгээргранитын цулдал дээрх гадаргуугийн эерэг бүтцийн хэлбэрийн оршил тайлбарлагдахболно.
Fabrication and evaluation of Ti-V-Cr hydrogen storage alloy
Authors: P Dashdemberel , N Tuvjargal , A Kamegawa , T Kimura
Published: March 2023

Ti-V-Cr alloys are known to absorb (desorb) nearly 2.6wt% of hydrogen. The hydrogenstorage properties of (30-36%)Ti-(30%)V-(34-40%)Cr compositions were studied in thispaper. The plateau pressure of Ti-30V-(40-x)Cr (x=0, 3, 6) alloys increased with increasingCr content. The properties of the Ti-35V-40Cr alloy were already studied with heat treatmentwas annealing 1173-1623K f by 1hour, and quenched into iced water. The alloy of 33Ti-30V-37Cr exhibits an effective hydrogen capacity of 2.1wt% at 373K
Ургамлын лейцин баялаг давталт агуулсан уургийн 310-хеликс – β- эргэлтээс бүрдэх супер хоёрдогч бүтэц ба домеин бүтцийн тодорхойлолт
Authors: Б Дашдаваа , Мацушима Норио , Энхбаяр Пүрэвжав
Published: March 2023

Эукариот, бактери, архей болон вирусээс тодорхойлсон 430,000 гаруй уураг ЛейцинБаялаг Давталт (ЛБД) агуулж байгаа нь тогтоогдоод байна. ЛБД-ууд нь 20-30 аминхүчлийн урттай бөгөөд зэрэгцсэн дараалалд тохиолддог. ЛБД агуулсан уураг нь тах,супер хеликс, эсвэл призм хэлбэрийн бүтэцтэй байх ба дотоод хүнхэр гадаргуудаапараллель β-утаслаг, гадаад гүдгэр гадаргуудаа ихэвчлэн хеликс бүтэц агуулна.Тухайн нэг ЛБД нь LxxLxLxxNxL консенсус дараалалтай сайн хадгалагдсан хэсэг(СХХ) болон хувьсах хэсэг (ХХ)-ээс бүрдэнэ. ЛБД-ын найман анги байна. УргамлынЛБД-ын хувьсах хэсэг нь 310-хеликс болон β-эргэлтээр тодорхойлогдох ба консенсусдараалал нь 13 амин хүчлийн урттай (xGxLPxxLxxLxx) байна. Ургамлын дархлаанысистемийн болон сигнал дамжуулах уургуудад ЛБД агуулагддаг. Ургамлын ЛБДагуулсан уургийн бүтцийн онцлогийг ойлгохын тулд бид DSSP-PPII, XTLSSTR баSTRIDE гэсэн гурван программ ашиглан хоёрдогч бүтцийн оноолт хийсэн. Уургийн3D бүтэц дэх альфа-нүүрстөрөгч (Cα) атомын координатыг ашиглан HELFITпрограммаар хеликсийн (алхам Р, радиус r, нэг эргэлтэд оногдох амин хүчлийн тоо n,эргэлтийн чиглэл, тэнхлэгийн нэгж вектор) параметрүүдийг тодорхойлсон. ЛБД-ынхувьсах хэсэг нь N-терминал талдаа 5-аас 7 амин хүчлийн урттай баруун эргэлттэй310-хеликс, C-терминал талдаа I төрлийн бета-эргэлтээс бүрдэж байна. Иймдургамалын ЛБД-ын хувьсах хэсэг нь 310-хеликс болон β-эргэлт агуулсан суперхоёрдогч бүтцээр тодорхойлогдож байна. HELFIT-ийн үр дүнгээс харвал I төрлийн β-эргэлт нь баруун (+1) эргэлттэй хеликс байна. HELFIT программаар 310-хеликс (G), β-эргэлт (B), ЛБД домеин (A) тус бүрийн хеликс тэнхлэгийн нэгж векторыгтодорхойлсон. Эдгээр гурван нэгж вектороор тодорхойлогдох Ω1, Ω2, ба Ω3 бүтцийнпараметр супер хоёрдогч бүтэц болон ЛБД домеины бүтцийн онцлогийг тодорхойлжбайна.
InGaAs/InAlAs quantum well дэх цахиурын атомын хольцын нөлөө
Authors: О Оюун-Эрдэнэ , ж Биазиол , Г Тамираа
Published: March 2023

Бид энэхүү ажлаар InGaAs/InAlAs quantum well (QW)-д дельта хэлбэрийн цахиурынатомын хольц хийсэн ба QW ба цахиурын атомын хольцын үе хоорондын зайг 5 – 45нм хүртэл өөрчлөн цахиурын атомын хольцыг QW-н дээр, доор байрлуулан тооцоохийж, хольцын концентрацийг өөрчлөн QW дахь цэнэгийн концентрацид хэрхэннөлөөлөхийг судлав. Үүнээс цахиурын атомын хольцыг QW-с холдуулах тусамэлектроны концентраци буурч байсан ба QW-н дээр хольцыг байрлуулахад шугаманхамааралтай ба хольцын концентраци ихсэхэд QW дотор үүсэх цэнэгийн хэмжээихсэж байгааг харууллаа.
Ялгаатай хэмжээтэй мөнгөний нанопартиклын химийн урвалын катализаторын идэвхийн судалгаа
Authors: Б Ихбаяр , Т Анхбаяр , Н Эрдэнэ , Х Тэгшжаргал , Р Галбадрах , Г Эрдэнэ-Очир
Published: March 2023

Энэхүү судалгааны ажлаар ялгаатай хэмжээтэй мөнгөний нанопартиклыг өөр өөрхарьцаатай ангижруулагчдын тусламжтайгаар нойтон химийн аргаар синтезлэнгаргаж авсан. Нанопартиклын хэмжээний болон спектрийн анализыг фотоны хөндлөнкорреляцийн спектроскопи, хэт ягаан туяа-үзэгдэх гэрлийн спектрофотометрээртодорхойлсон. Нитро бүлэгтэй ароматик нэгдлээр 2,4-динитрофенолыг төлөөлүүлэнавч катализаторын идэвхийг тодорхойлсон. Туршилтын үр дүн мөнгөнийнанопартиклын хэмжээ багасах тусам урвалын хурд өсч байгааг харуулсан
Импортын зарим турмерик нунтгийн элементийн шинжилгээний урьдчилсан дүн
Authors: Н Отгонпүрэв , Д Болортуяа , П Зузаан
Published: March 2023

Бид энэ ажлаар Монгол улсад импортоор орж ирсэн, зах зээлд худалдаалагдаж байгаа зарим турмерикны дээжийг цуглуулан судалгаа хийж, түүнд агуулагдах үндсэн болон дагалдах хортой, хүнд элементүүдийг рентген-флоуресценцийн анализын аргаар тодорхойлов.
Агаарын тоосонцорын олон улсын ур чадварын сорилтын шинжилгээнд оролцсон дүн
Authors: Н Отгонпүрэв , Д Болортуяа , Д Шагжжамба , П Зузаан
Published: March 2023

Бид энэ ажлаар агаарын бохирдлын судалгаа хийдэг лабораториудын дунд ОУАЭАаас зохион байгуулсан ур чадварын сорилтод оролцож, Цөмийн физикийн судалгааны төвийн энергиэр ялгах рентген-флоуресценцийн спектрометр ашиглан элементийн анализ хийж, бусад орны лабораториудын үр дүнтэй харьцуулан үзүүлэв.
Агаар дахь радон, түүний задралын бүтээгдэхүүнийг судалсан тухай
Authors: Н Норов , С Даваа
Published: March 2023

The simple method for determination of RaA, RaB and RaC in air by alpha counting of air filters was described. Diurnal variation of radon equilinrium equivalent concentration in outdoor air at some city Mongolia is observed.
Karakterisasi Kadar Mineral, Logam Berat Serta Distribusi Ukuran Partikel Limbah Abu Terbang (Fly Ash) Sisa Pembakaran Batu Bara Industri Oleokimia
Authors: Tambunan Pravil Mistryanto
Published: March 2023

Telah dilakukan penentuan kadar mineral SiO2, Fe2O3, Al2O3, CaO dan MgO; kadar logam berat Zn, Pb, Cd, Cr dan Cu; serta penentuan distribusi ukuran partikel dari limbah abu terbang (fly ash) batubara industri oleokimia. Penentuan mineral SiO2, Fe2O3, dan Al2O3 dilakukan secara gravimetri sedangkan CaO dan MgO menggunakan metode titrimetri. Penentuan kadar logam berat dilakukan dengan menggunakan metode Spektroskopi Serapan Atom (SSA). Dari penelitian yang dilakukan didapatkan karakteristik komposisi mineral SiO2, Fe2O3, Al2O3, CaO dan MgO dari sampel fly ash batubara yang berasal dari limbah industri oleokimia masing-masing 22,842%; 0,0210%; 20,599%; 2,145%, dan 0,39% serta kandungan logam berat Zn, Pb, dan Cd masing-masing sebesar 21,90625 mg/L; 6,1467 mg/L; dan 0,37065 mg/L. Sedangkan kandungan logam berat Cr dan Cu tidak terdeteksi. Data hasil pengukuran partikel dengan instrumen Laser Scattering Particle Size Distribution Analyzer Tipe LA-950 didapatkan ukuran rata-rata (mean size) dari partikel fly ash adalah 291,08762 Î¼m. Berdasarkan nilai ambang batas yang ditetapkan oleh pemerintah tersebut, kadar logam berat zinc (Zn) dan kadmium (Cd) pada sampel limbah fly ash batubara industri oleokimia masih berada dibawah ambang kadar yang ditetapkan. Sedangkan kadar timbal (Pb) berada di ambang batas yang ditetapkan oleh PP 85 Tahun 1999 Tentang Pengelolaan Limbah B3.
O QUE É A DOUTRINA PUTIN? A QUESTÃO ESTRATÉGICA RUSSA E A SEGURANÇA NACIONAL AMPLIADA
Authors: Hage José Alexandre Altahyde
Published: March 2023

O objetivo deste ensaio é analisar o documento denominado de Doutrina Putin, publicado por Sergei Karaganov, em janeiro de 2022, sua relação com o expansionismo russo encontrado na anexação da região ucraniana da Criméia, em 2014, e sua crítica ao sistema internacional emergente com o fim da Guerra Fria; momento considerado bastante prejudicial, para os russos, à renovação de poder daquele país e sua ascensão como grande potência. O corte de tempo da investigação é de 1991, fim da União Soviética, e janeiro de 2022, início das hostilidades entre Rússia e Ucrânia pelo Donbass. A linha argumentativa, teórico-metodológica, deste ensaio emprega literatura do pensamento geopolítico e de autores pertencentes ao realismo da teoria de relações internacionais.
Innovative stakeholder engagement in rural secondary school: The impact on the learners’ performance and the quality of education
Authors: Ramasimu Ntsieni Fitzgerald
Published: March 2023

The stakeholder engagement process entails schools soliciting information and ideas from various stakeholders for them to meaningfully contribute to the school’s success. The involvement of multiple stakeholders leads to effective school management (Bruns et al., 2011). The presence of stakeholders improves learner performance and educational quality. The stakeholders in the school are those who help the school achieve its goals and objectives, either directly or indirectly (Darrel et al., 2020). This paper seeks to investigate the extent to which rural secondary school principals engage stakeholders such as school governing bodies (SGBs), parents, community members, businesspeople, civic organizations, and teachers in novel ways to improve learners’ performance and educational quality. The quantitative descriptive case study method was employed. Using a simple random sampling method, 110 principals were selected from a population of 151 principals of secondary schools in the Vhembe district, Limpopo province, South Africa. A self-administered questionnaire was used to collect data. The data was analyzed using descriptive statistical methods. The findings of the study revealed that principals involve some stakeholders in school activities, including SGBs, teachers, students, and parents. The study, however, found that principals are not engaging with stakeholders such as civic groups, businesspeople, non-governmental organizations, and alumnae. If principals want to reap the benefits of stakeholder engagement in schools, they should not be picky about who they invite to participate. Since education is a societal issue, they should take a comprehensive approach to stakeholder engagement.
Transformation of fossil energy substitution to new and renewable energy in the emerging economy
Authors: Ariyanto Bintoro , Pramuka Bambang Agus , Ahmad Abdul Aziz
Published: March 2023

Fossil energy is getting less and less and this study aims to determine the effect of the substitution of fossil energy with new and renewable energy on the monetary value of electricity subsidies in Indonesia. Rezki (2012) stated that the level of gross domestic product (GDP) per capita in a country in Southeast Asia had a positive relationship with the level of energy consumption. Indonesia is a relatively small electricity user per capita, with consumption only equivalent to a quarter of the world average (Davis, 2013). The data used is time series data from 2011–2019 with a multiple linear regression analysis method. The regression results three of the four independent variables which include tariffs, cost of supply (CS), and electricity sales volume have a significant influence and have a positive correlation with the subsidy, while the margin variable has no significant effect against subsidies. Based on the F-test, all independent variables have a significant effect on the monetary value of subsidies. This simulation shows a positive relationship between CS and the monetary value of subsidies, it means that the substitution of fossil energy, including coal with new and renewable energy, which is environmentally friendly but is still relatively expensive, will result in an increase in energy subsidies. Thus, the implementation of the energy transition policy from fossil energy to new and renewable energy (NRE) in Indonesia must be carried out conservatively by taking into account the dynamics of the right time.