In this paper we have demonstrated the possibility of the MWCNT growth on initially amorphous Co–Zr–N–O alloy thin film which was crystallized during heating followed by formation of Co particles on ...the surface. It was found that during CVD not only the growth of usual MWCNT array but also the formation of MWCNT arrays with a top covering layer and bilevel MWCNT arrays take place. The details of MWCNT array growth process are discussed. We have found that carbon nanotubes growth strongly depends on the Co concentration in the alloy film. The presented technique of MWCNT growth can be used in the preparation of new advanced engineering materials.
Research has found that the parameters of the surface to be treated, the speed of the unit, the lateral movements of the working bodies and the instantaneous center of rotation, due to the ...redistribution of the gravity of the unit on the slopes, lead to uneven processing depth. To study the characteristics of the change in the stroke depth of the working bodies of the combined unit, according to the results of field experiments, an assessment was made of the uniformity of the stroke depth of the working bodies of the combined unit for slope treatment.
In order to expand the spectral capabilities of the SERS method, Ag–Cu alloy nanoparticle arrays were studied. Arrays of Ag–Cu nanoparticles were formed by vacuum thermal evaporation and condensation ...on an unheated substrate followed by heat treatment at 230 °C. A higher Raman scattering enhancement in the red region of the spectrum when using an array of nanoparticles of the Ag–Cu eutectic system was found. This enhancement is comparable to the one of pure silver particle array in the blue region of the spectrum. Transmission electron microscopy study has shown that the feature of the Ag–Cu array is that many particles are composite: one part consists of copper, and the other part is made up of silver. These parts have a perfect (possibly heteroepitaxial) boundary. It is believed that the localized surface plasmon resonance excited in the copper part by red light can be transmitted without any loss into the silver part, while the one excited in the silver part by blue light, quickly fades out in the copper part, because blue light has a higher frequency than the copper plasma frequency. From the point of view of SERS applications, the use of Ag–Cu particle arrays allows extending the advantage of silver to the red region of the spectrum.
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•Maximum amplification of the Raman signal for the array of Ag–Cu particles is observed in the red region of the spectrum.•Many particles in the array are composite: one part is copper the other is silver.•The border between the copper and silver parts is perfect.
Данная работа исследует использование ChatGPT, мощной модели искусственного интеллекта, для поддержки принятия решений на различных этапах жизненного цикла ИТ-инновации. Работа основана на анализе ...эффективности и применимости ChatGPT в контексте поддержки принятия решений внаучно-исследовательских работах и процессах разработки программного обеспечения. Исследование описывает принципы взаимодействия с ChatGPT, его способность анализировать и обрабатывать текстовую информацию, а также его возможности в генерации содержательных и контекстно связанных ответов в контексте решаемых задач в научно-исследовательских работах и тестировании программного обеспечения. В работе рассматривается потенциальное использование использования ChatGPT для поддержки принятия решений, для определения преимуществ и ограничений.
This paper explores the use of ChatGPT, a powerful artificial intelligence model, to support decision-making at various stages of the IT innovation lifecycle. The work is based on the analysis of the effectiveness and applicability of ChatGPT in the context of decision support in scientific research and software development processes. The study describes the principles of interaction with ChatGPT, its ability to analyze and process textual information, as well as its capabilities in generating meaningful and contextually related answers in the context of tasks being solved in research and software testing. The paper discusses the potential use of using ChatGPT to support decision-making, to identify advantages and limitations.
By means of small magnetic field ac susceptibility measurement at 10 kHz we
found that the real and imaginary parts of ceramic $YBa_2Cu_3O_ x$
susceptibility in presence of the external low frequency ...field close to 0.1 Hz
exhibit frequency dependence. The wide maximum of hysteresis losses and
{\color{black} the exponential dependence} of the {\color{black} effectiveness
of flux penetration} with increasing of external field frequency were obtained.
We observed a nonlinear dynamic magnetic response in presence dc field and we
suggest that this behavior is due to the dynamic and static Josephson
vortex-vortex interaction.
By means of small magnetic field ac susceptibility measurement at 10 kHz we found that the real and imaginary parts of ceramic \(YBa_2Cu_3O_ x\) susceptibility in presence of the external low ...frequency field close to 0.1 Hz exhibit frequency dependence. The wide maximum of hysteresis losses and {\color{black} the exponential dependence} of the {\color{black} effectiveness of flux penetration} with increasing of external field frequency were obtained. We observed a nonlinear dynamic magnetic response in presence dc field and we suggest that this behavior is due to the dynamic and static Josephson vortex-vortex interaction.
The kinetics of the grafting of functionally active monomers
N
-methylolmorpholine,
N
-methylol-acrylamide, and
N
-methylolmethacrylamide onto chitosan molecules is investigated. Kinetic constants ...and the activation energies of the grafting of these monomers onto glucosamine polymer are determined. The activity of grafting
N
-methylol monomer derivatives onto chitosan is determined from the resulting data.
To date, the success of conventional chemotherapy, radiotherapy, and targeted biological therapies in cancer treatment is not satisfactory. The main reasons for such outcomes rely on low target ...selectivity, primarily in chemo- and radiotherapy, ineffectiveness to metastatic disease, drug resistance, and severe side effects. Although immune checkpoint inhibitors may offer better clinical promise, success is still limited. Since cancer is a complex systemic disease, the need for new therapeutic modalities that can target or block several steps of cancer cell characteristics, modulate or repolarize immune cells, and are less toxic to healthy tissues is essential. Of these promising therapeutic modalities are pleiotropic natural products in which scorpion venom (SV) is an excellent example. SV consists of complex bioactive peptides that are disulfide-rich of different peptides' length, potent, stable, and exerts various multi-pharmacological actions. SV peptides also contain ion channel inhibitors. These ion channels are dysregulated and overexpressed in cancer cells, and play essential roles in cancer development and invasion, as well as depolarizing immune cells. Furthermore, SV has been found to induce cancer cell apoptosis, and inhibit cancer cells proliferation, invasion, metastasis, and angiogenesis. In the current review, we are presenting data that show the pleiotropic effect of SV against different types of human cancer as well as revealing one potential anticancer agent, Rhopalurus princeps venom. Furthermore, we are addressing what is needed to be done to translate these potential cancer therapeutics to the clinic.
The design and operation of an experimental installation are described, used for simulating those factors that most greatly affect the properties of materials and microelectronic devices in ...conditions of the near Earth (Low Earth Orbit) environment. The simulator apparatus is in the form of a cylindrical metal vacuum chamber constructed and mounted to the electron accelerator facility of the Center for the Advancement of Natural Discoveries using Light Emission Synchrotron Research Institute (Armenia) which allows the production of accelerated electrons with the following parameters: ultra-short pulse duration (τ = 4·10−13 s), electron energy 3.5 MeV, pulse current intensity 60 A/cm2, pulse frequency 12 Hz. A comparison may be made with conventional electron accelerators, which employ micro-second pulse duration, and a far lower current intensity of 2∙10−3 A/cm2. Thus, the specific features of this installation enable the simulation of ultra-fast processes as occur in cosmic space or under other extreme conditions. Here, we present the initial results obtained, concerning the influence of high-density electron irradiation on the behavior of the electro-physical properties of silicon crystals. Peculiarities and differences are presented between the results obtained from silicon crystals irradiated by electrons with an energy of 3.5 MeV and a pulse duration of τ = 4·10−13 s, and those from silicon samples irradiated with 7.5 MeV or 50 MeV energy electrons, using conventional electron accelerators.
•A vacuum chamber was designed and constructed for LEO environment simulation.•The chamber was connected to ultra-short pulse duration electron beam.•The simulator tested and parameters correspond to the main LEO conditions.•First results are presented on silicon properties investigation in the simulator.•The created stand allows in-situ and complex study of materials under LEO factors.
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