bluuebunny/crossref_metadata_2025_split huggingface dataset:
Observation of Complex Organic Molecules Containing Peptide-like Bonds Toward Hot Core G358.93–0.03 MM1
Authors: Manna Arijit , Pal Sabyasachi 
Published: June 2024

Abstract
In star formation regions, the complex organic molecules (COMs) that contain peptide bonds (–NH–C(=O)–) play a major role in the metabolic process because –NH–C(=O)– is connected to amino acids (R-CHNH2–COOH). Over the past few decades, many COMs containing peptide-like bonds have been detected in hot molecular cores (HMCs), hot corinos, and cold molecular clouds, however, their prebiotic chemistry is poorly understood. We present the first detection of the rotational emission lines of formamide (NH2CHO) and isocyanic acid (HNCO), which contain peptide-like bonds toward the chemically rich HMC G358.93–0.03 MM1, using high-resolution and high-sensitivity Atacama Large Millimeter/submillimeter Array bands 6 and 7. We estimate that the column densities of NH2CHO and HNCO toward G358.93–0.03 MM1 are (2.80 ± 0.29) × 1015 cm−2 and (1.80 ± 0.42) × 1016 cm−2 with excitation temperatures of 165 ± 21 K and 170 ± 32 K, respectively. The fractional abundances of NH2CHO and HNCO toward G358.93–0.03 MM1 are (9.03 ± 1.44) × 10−10 and (5.80 ± 2.09) × 10−9. We compare the estimated abundances of NH2CHO and HNCO with the existing three-phase warm-up chemical model abundance values and notice that the observed and modeled abundances are very close. We conclude that NH2CHO is produced by the reaction of NH2 and H2CO in the gas phase toward G358.93–0.03 MM1. Likewise, HNCO is produced on the surface of grains by the reaction of NH and CO toward G358.93–0.03 MM1. We also find that NH2CHO and HNCO are chemically linked toward G358.93–0.03 MM1.
Inter-ELM pedestal turbulence dynamics dependence on q95 and temperature gradient
Authors: Yan Z. , McKee G.R. , Xia J. , Jian X. , Groebner R. , Rhodes T. , Barada K. , Haskey S. , Chen J. , Banerjee S. , Laggner F. ,   the DIII-D Team
Published: June 2024

Abstract
A series of dedicated experiments from the DIII-D tokamak provide spatially and temporally resolved measurements of electron density and temperature, and multiscale and multichannel fluctuations over a wide range of conditions. Measurements of long wavelength density fluctuations in the type-I ELMing H-mode pedestals routinely reveal a coexistence of multiple instabilities that exhibit dramatic different dynamic behaviors as q95 and temperature gradients are varied, apparently responsible for limiting pedestal temperature profiles. Two distinct frequency bands of density fluctuations are modulated by an ELM cycle with frequency above 200 kHz propagating in the electron diamagnetic direction in the lab frame (electron mode) and below 200 kHz propagating in the ion diamagnetic direction (ion mode). The electron mode amplitude peaks near the electron temperature gradient region and increases with q95 which seems to be correlated with the increased χe
at higher q95, similar to the characteristics expected for the micro-tearing mode (MTM). At higher q95, during the inter-ELM period, the ion mode decays at the later phase of the ELM cycle. Consistently, the poloidal correlation length of the ion mode is also found to reduce, which suggests the possible E × B flow shear suppression of the ion mode at the later phase of the ELM cycle as the Er
well recovers. In contrast, the electron mode grows during the ELM cycle and reaches saturation at around 50%–60% of the ELM period. Linear gyrokinetic simulations find the MTMs to be the most unstable mode in the pedestal electron temperature gradient region. The higher q95 and lower magnetic shear destabilize the MTMs. These observations provide key insights into the underlying physics of multifield properties and a rich dataset of experimental ‘fingerprints’ that enable new tests of theoretical pedestal models and lead to the development of a predictive model for pedestal formation on the ITER and future burning plasma experiments.
An effort to distinguish the effects of cloud cover and aerosols on the decadal variations of surface solar radiation in the Northern Hemisphere
Authors: Jiao Boyang , Su Yucheng , Li Zichen , Liao Longshi , Li Qingxiang , Wild Martin 
Published: June 2024

Abstract
Surface solar radiation (SSR) serves as the primary energy source on Earth. However, a relative lack of research systematically quantifies long-term SSR variations and their driving factors based on complete and reliable baseline data. This paper presents a new assessment of the Northern Hemisphere/regional SSR variations and the influence of total cloud cover (TCC) on these variations, based on the latest reconstructed SSR gridded dataset. We also address multicollinearity among multiple aerosol types and quantify the effects of multiple aerosol/precursors on SSR variability using a partial least squares regression model. The results indicate that TCC is not the predominant driver of longer-term SSR variations, known as ‘dimming’ and ‘brightening’. The variations of NH3 and SO2 primarily drive inter-decadal SSR variations in North America, while the variations of SO2 and NO
X
mainly influence inter-decadal SSR variations in Europe.
Variations on the Choi–Jamiołkowski isomorphism
Authors: Frembs Markus , Cavalcanti Eric G 
Published: June 2024

Abstract
The Choi–Jamiołkowski isomorphism is an essential component in every quantum information theorist’s toolkit: it allows to identify linear maps between two quantum systems with linear operators on the composite system. Here, we analyse this widely used gadget from a new perspective. Namely, we explicitly distinguish between its kinematical and dynamical properties, that is, we study the isomorphism on two different levels: Jordan algebras and the different

C
∗

-algebras they arise from, which are distinguished by their order of composition. A number of important and novel insights stem from our analysis. We find that Choi’s theorem, which asserts that Choi’s version of the isomorphism (Choi 1975 Lin. Alg. Appl.
10 285) further maps the positive cone of completely positive linear maps (such as quantum channels) to the cone of positive linear operators (such as quantum states) on the composite system, crucially depends on the dynamical structure in

C
∗

-algebras. We explain in detail how this dependence gives rise to the mismatch between the basis-dependence of Choi’s version of the isomorphism, and the basis-independent version by Jamiołkowski (1972 Rep. Math. Phys.
3 275). We then overcome this subtle but pervasive issue in a number of ways: first, we prove a version of Choi’s theorem for Jamiołkowski’s isomorphism, second, we define a basis-independent variant of Choi’s isomorphism and, third, by making explicit the dynamical distinction between Jordan and

C
∗

-algebras, we combine the different variants of the isomorphism into a unified description, that subsumes their individual features. We also embed and interpret our results in the graphical calculus of categorical quantum mechanics.
Completing the bootstrap program for

T

T

―

-deformed massive integrable quantum field theories
Authors: Castro-Alvaredo Olalla A , Negro Stefano , Sailis Fabio 
Published: June 2024

Abstract
In recent years a considerable amount of attention has been devoted to the investigation of 2D quantum field theories perturbed by certain types of irrelevant operators. These are the composite field

T

T

―

—constructed out of the components of the stress-energy tensor—and its generalisations—built from higher-spin conserved currents. The effect of such perturbations on the infrared and ultraviolet properties of the theory has been extensively investigated. In the context of integrable quantum field theories, a fruitful perspective is that of factorised scattering theory. In fact, the above perturbations were shown to preserve integrability. The resulting deformed scattering matrices—extensively analysed with the thermodynamic Bethe ansatz—provide the first step in the development of a bootstrap program. In this paper we present a systematic approach to computing matrix elements of operators in generalised

T

T

―

-perturbed models, based on employing the standard form factor program. We show that for theories with diagonal scattering and certain types of fields the deformed form factors, factorise into the product of the undeformed ones and of a perturbation- and theory-dependent term. From these solutions, correlation functions can be obtained and their asymptotic properties studied.
The method for determining the safety factor of rock mass stability
Authors: Shchokin Vadym , Shchokina Olha , Aniskov Oleksandr 
Published: June 2024

Abstract
The article is devoted to determining the safety factor of rock mass stability by measuring the intensity of electromagnetic pulses in the rock mass that are derived from natural stresses within the massif as well as additional applied loads imposed on it. The rock mass stability is evaluated according to the parameters of the electromagnetic pulses. The distinctiveness of this lies method in the preliminary determination of a frequency range corresponding to a specified depth within the mining massif, facilitating the calculation of the stability reserve coefficient. Explosive events resulting from the detonation of geological formations serve as external influences for instrumental measurements of the mass. The approach entails the measurement of electromagnetic pulses and the time required for these impulses to decay from post-explosion levels to the background electromagnetic pulses level. The stability reserve coefficient of the mass is subsequently determined through an equation accounting for the internal friction angle of the geological formations, the maximum electromagnetic pulses amplitude induced by the explosion, and the duration of decay until the background electromagnetic pulses level is reached.
Controlling the dynamic characteristics of steel bunker containers for bulk materials
Authors: Bannikov Dmytro , Tiutkin Oleksii , Hezentsvei Yukhym , Muntian Antonina 
Published: June 2024

Abstract
The article presents the main results of research devoted to the definition and analysis of the dynamic characteristics of steel small-sized bunker containers for storing bulk materials. All studies were carried out using the finite element method with the use computer complex SCAD. The object of research was a bunker of a bypass track for feeding bulk materials with a total volume of up to 70 m3. The study analysed the natural partial frequency spectrum and the partial oscillation modes of individual load-bearing elements of the bunker. Based on the results of the data analysis, a rather high quantitative density of the natural frequency spectrum was determined. At the same time, its lower limit is about 25-30 Hz for an empty bunker capacity and decreases to 3-5 Hz when the bunker is fully loaded, which is dangerous from the point of view of the possibility of resonance phenomena. In order to qualitatively and quantitatively control the dynamic characteristics, it was proposed to change the steel strength of the structure, which made it possible to change the natural frequencies by about 15% for every 100 MPa change in steel strength for the bunker containers of the considered type.
Optimization of the technology of hoisting operations when drilling oil and gas wells
Authors: Khomenko Volodymyr , Pashchenko Oleksandr , Ratov Boranbay , Kirin Roman , Svitlychnyi Serhii , Moskalenko Alla 
Published: June 2024

Abstract
In the process of drilling deep wells, hoisting operations are, although unproductive, a necessary expenditure of working time and occupy 25-60% of the total time of well construction. In the case of major repair of wells, this share can be even higher. It is clear that the technical and economic indicators of drilling and capital repair of wells largely depend on the speed of execution of hoisting operations. Existing technologies and time standards for their implementation are outdated and do not take into account the current state of technology development. The article deals with the issue of optimization of the rationing of time for the execution of hoisting operations during drilling and capital repair of oil and gas wells. This problem is solved using the example of the TW-125 CA A6 well overhaul installation, which are used during overhaul of wells by branches of JSC “Ukrgazvydobuvannya”. With the help of the kinematic scheme of the installation, the rotation speeds of the winch shaft at each gear of the gearbox were determined, which made it possible to determine the optimal time for performing hoisting operations, and, as a result, to reduce the time spent on drilling, depending on the type of rock, in general.
Bench studies of the process of transporting an inverse gravel filter of block type along the well
Authors: Chudyk Ihor , Sudakova Diana , Pavlychenko Artem , Sudakov Andrii 
Published: June 2024

Abstract
The purpose of the study is to develop a technology for fresh water treatment in deep hydrogeological wells with productive horizons represented by medium-grained, fine-grained, and silty sands by equipping their intake part with block-type inverse gravel filters. Experimental studies were carried out using provisions of the general theory of scientific experiment and the theory of random processes. A theory concerning the possibility of equipping the water intake part of hydrogeological wells, being more than 200 m deep, with block-type inverse gravel filters using the proposed technology was further developed. For the first time, the dependence of the maximum depth of transporting block-type inverse gravel filters on the length of their section, the mass concentration of a binding agent, and the ambient temperature was established. A scope of the proposed technology was substantiated. A range of depths for equipping with block-type inverse gravel filters depending on the mass concentration of a binding agent in the polymer-gravel filter element and the length of its section was substantiated.
Network model optimization of existing mining enterprises to sustain production capacity
Authors: Brovko Dmytro , Kononenko Volodymyr , Khvorost Vasyl , Tyshchenko Vitalina 
Published: June 2024

Abstract
The paper is devoted to the sustainability of the production capacities of mining enterprises when extracting minerals. The timely capacity restoration is the main problem for scientists dealing with sustainable development in mining construction. The paper presents the use of network planning and optimization methods of dynamic programming to solve problems of sustaining the existing capacities of mining enterprises. The proposed methods allow for the integrated use of network planning and dynamic programming to optimize the parameters of mining operations. A network model of the technological scheme of mining operations with optimal parameters is proposed. The necessity of timely restoration of capacities of mining enterprises with the use of network planning and mathematical programming methods in solving these problems is highlighted.
The innovativeness of technologies of Industry 4.0 in the modern mining environment
Authors: Vnukova Nataliya , Tyshchenko Viktoriia , Ostapenko Viktoriia 
Published: June 2024

Abstract
The article presents the results of Industry 4.0 technologies in the modern mining environment. The study is aimed at identifying trends in interest in the topic of innovativeness of Industry 4.0 technologies in the modern global mining environment. To solve the problem of implementing innovations in the context of Industry 4.0 in the modern mining environment, particularly those related to mining science, two approaches were used: the Google Trends search service and the VOSviewer software. The first stage of the study identified the level of interest in mining science and Industry 4.0 in the world. According to the results of the second stage of the study, 8 strategic directions for the development of the mining industry within Industry 4.0 were identified in accordance with the qualitative composition of clusters by keywords in scientific publications, the Scopus scientometric database on the topic of innovativeness of Industry 4.0 technologies in the modern mining environment. It is proposed through amending the mining legislation in accordance with the development of Industry 4.0 technologies for the automation and digitalization of mining significantly increase interest in transformational changes.
Improvement of the device’s design for increasing the efficiency of geophysical research using the Earth’s natural pulsed electromagnetic field method
Authors: Chepurnyi Volodymyr , Liash Serhii , Hrytsai Olena , Dobrovolska Zoia 
Published: June 2024

Abstract
Long-term field studies have shown the high efficiency of the geophysical method of the earth’s natural pulsed electromagnetic field (NPEMFE). It is a modern and experimentally substantiated tool for studying geodynamic processes in the geological environment. Disadvantages of the known device are the low efficiency of recording the intensity level of the NPEMFE, low productivity and high costs of manual labor when performing complex registration. The application of the proposed improvements will make it possible to increase the efficiency of registration of the intensity level of the NPEMFE with an increase in productivity and a decrease in costs and the level of manual labor. The technical result is achieved due to the mobility of the structure and the provision of the possibility of simultaneous registration of the intensity level of the NPEMFE both in the frequency band and in its spatial position.
Development of the oil-contaminated wastewater treatment technology for trucking companies
Authors: Kovrov Oleksandr , Kulikova Daria 
Published: June 2024

Abstract
Industrial activity of trucking companies belongs to environmentally dangerous processes, which leads to the pollution of natural ecosystems, both in local and regional scale. Currently, there are strict requirements for the quality of wastewater discharged from trucking companies and car-wash sites into the outer sewer or the storm water network. This erases the urgency of the installation of local treatment facilities and implementing of the water circulating supply systems with maximum water consumption and minimum discharge of wastewater into natural water bodies. The improved technology of wastewater treatment for the trucking companies with preliminary stage of the multilayer oil-trap treatment is presented. The modeling of sedimentation process of wastewater contaminated with petroleum products allowed determine structural parameters of the proposed oil trap. The main technological parameters of wastewater treatment according to the proposed technological scheme have been determined. Implementation of the proposed technology at the trucking company allows reduce the content of petroleum products and suspended solids according to Ukrainian normative standards for water quality. This improvement minimizes the impact of contaminated wastewater on neighboring water bodies and extends capacity for water reuse in the technological process of trucking companies.
Functional materials based on high-purity zirconium compounds for applications in alternative energy
Authors: Mukhachev Anatolii , Yelatontsev Dmytro , Kharytonova Olena , Snizhnoi Hennadii 
Published: June 2024

Abstract
The paper presents the results of experiments on obtaining functional materials (piezoceramics, catalysts, heat-resistant coatings) based on zirconium oxide. It is shown that zirconium oxynitrate, obtained in the process of extraction separation of zirconium and hafnium, has a low content of impurities determining the quality of products based on zirconium oxide. The method of homogeneous deposition of stoichiometric zirconium compounds with alloying additives provided homogeneous salt systems for functional ceramics. The high homogeneity of the material and its physicochemical and mechanical properties allowed to obtain powders at much lower temperatures than solid-phase synthesis, providing high-quality products at low energy consumption.
Reducing operational risks during suspensions separation in rare metals technology
Authors: Yelatontsev Dmytro , Nefedov Volodymyr , Kharytonova Olena 
Published: June 2024

Abstract
The work presents the results of studies of the solid-liquid separation processes of different mineralogical and granulometric compositions, different viscosity and concentrations of uranium, zirconium, nitric acid, soda, sodium nitrate. It has been shown that the process of industrial filtration is impossible for finely dispersed phases due to the low separation rate. Requirements for the purity of technological solutions of uranium and zirconium for the extraction process are limited by the technological ability of the filter fabric to retain the smallest particles, including chemical compounds with a particle size of 1–5 μm. The control filtration process is only possible under pressure, for which a new disk press filter was created, which reduced the concentration of the solid phase in the filtrate to 0.06 g/L. For difficult-to-filter suspensions, a screw centrifuge was developed, which ensured minimum sediment moisture after separating the finely dispersed phase from a solution of soda and sodium silicate and created conditions for maximum extraction of zirconium and hafnium from the solid phase. The separation of water-soluble sodium silicate ensured the stability of the process of extraction separation of zirconium and hafnium and made it possible to isolate silicon oxide.
Utilization of drilling waste when drilling wells in the fields of the western oil and gas region of Ukraine
Authors: Mykhailovska Olena , Zotsenko Mykola 
Published: June 2024

Abstract
The article analyzes known technological solutions for storage and processing of well drilling waste. The advantage of the solution is the presence of a soil-cement coating. The authors propose to fill the waste repository with alternating layers of drilling mud and fly ash of the Darnytsia Thermal Power Plant. The authors advise to use sorbents for neutralization of petroleum products as needed. It is suggested to introduce the sorbent periodically into the mud storage barn. The thickness of the layers for disposal with the addition of ash was chosen in order to obtain optimal humidity. It is proposed to add ash removed from the Darnytsia Thermal Power Plant when arranging the walls and coating of the mud storage tank from soil cement. When adding 10% of ash by weight of cement, the compressive strength increases by 8.01% on average, and when adding 20% - by 12.57%. The results obtained show that the average compressive strength of soil cement samples increases with an increase in the percentage of fly ash content. The results were compared to samples without additives.