bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of crack-free laser additive manufactured Inconel 939 alloy driven by computational thermodynamics method
Authors: Zeng Congyuan , Ding Huan , Bhandari Uttam , Guo S. M. 
Published: September 2022

AbstractThis paper examined the effect of Si addition on the cracking resistance of Inconel 939 alloy after laser additive manufacturing (AM) process. With the help of CALculation of PHAse Diagrams (CALPHAD) software Thermo-Calc, the amounts of specific elements (C, B, and Zr) in liquid phase during solidification, cracking susceptibility coefficients (CSC) and cracking criterion based on $$\left| {{\text{d}}T/{\text{d}}f_{{\text{s}}}^{1/2} } \right|$$

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f

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values (T: solidification temperature, fs: mass fraction of solid during solidification) were evaluated as the indicators for composition optimization. It was found that CSC together with $$\left| {{\text{d}}T/{\text{d}}f_{{\text{s}}}^{1/2} } \right|$$

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values provided a better prediction for cracking resistance.
Graphical abstract
Graphitic surface layer formation on organic substrates for electronics using a concentrated solar simulator
Authors: Abuseada Mostafa , Alghfeli Abdalla , Fisher Timothy S. 
Published: September 2022

AbstractHeat spreading is an important attribute that improves thermal management and operation of high-performance packages, such as those for solid-state power amplifiers. This attribute can be enhanced through direct transformation of polymers into graphitic films. The present work reports a custom vacuum deposition process that synthesizes thin graphitic layers on organic substrates through direct pyrolysis via concentrated irradiation from a xenon lamp to produce a peak heated zone of approximately 3 cm diameter with a maximum heat flux of 3.2 MW/m$$^2$$

2

. The light source, replaceable with concentrated terrestrial solar power, provides ultrafast heating of substrates through rapid flashes (< 0.5 s) and improves growth rates over relatively larger areas compared to laser processing, mitigating the issue of porosity in graphitic layers that deteriorate heat spreading capabilities. The enhanced organic substrates are analyzed using Raman and energy-dispersive X-ray spectroscopy, scanning electron microscopy, and thermal diffusivity measurements, indicating graphitic conversion.
Graphical abstract
Justifying parameters for the automatic servo control system of a rotary plate vacuum pump in the milking machine
Authors: Aliiev Elchyn , Paliy Andriy , Kis Viktor , Milenin Andriy , Ishchenko Katerina , Paliy Anatoliy , Levchenko Iruna , Livoshchenko Lyudmila , Livoshchenko Yevheniia , Plyuta Larisa 
Published: September 2022

The scientific task to improve energy efficiency and ensure the process of vacuum regime stabilization in the operation of milking machines has been solved.
A mathematical model of the process of functioning of the servo control system of a rotary plate vacuum pump was built; the numerical modeling of its workflow was carried out.
This paper reports the results of experimental studies on the influence of the regime parameters of the rotary plate vacuum pump on the efficiency of its operation, as well as the results of experimental research on the servo control system for the rotary plate vacuum pump.
The operational process of the rotary plate vacuum pump HB-1200 for a milking machine was investigated. The influence of mode parameters (rotor speed n and vacuum pressure P) on the performance of the vacuum pump, Qa, vacuum pressure fluctuation, ΔP, and the power consumption of the vacuum pump drive, Np, has been determined.
The servo control system of the rotary plate vacuum pump was experimentally investigated based on the developed algorithms of its operation. In a generally accepted algorithm, vacuum fluctuation increases with increasing an airflow rate: at ΔQa=45 l/min – ΔP=2.3 kPa; at ΔQa=90 l/min – ΔP=4.6 kPa; at ΔQa=135 l/min – ΔP=6.4 kPa. Unlike the generally accepted one, the developed algorithm enables a stable vacuum mode with the largest vacuum fluctuation being ΔP=2.4 kPa.
For the first time, the functional dependence of the influence of the regime parameters of the rotary plate vacuum pump with its automatic servo control system on the stability of the vacuum regime of a milk-vacuum system in the milking machine was established.
The results can be applied when improving milking machines in terms of ensuring the stabilization process of the vacuum regime.
Determining the influence of geometric factors and the type of heat carrier on the thermal resistance of miniature two-phase thermosyphons
Authors: Kravets Vlаdіmіr , Konshin Valeriy , Hurov Dmytro , Vorobiov Mykyta , Shevel Ievgen 
Published: September 2022

This paper reports experimental data on the total thermal resistance of copper two-phase thermosiphons with internal diameters of 3 mm, 5 mm, and 9 mm, 700 mm long. Water, ethanol, methanol, and freon-113 were used as heat carriers. During the study, thermosiphons were located vertically. The length of the heating zone varied from 45 mm to 200 mm while the length of the condensation zone was constant and equaled 200 mm. The filling coefficient of thermosiphons varied from 0.3 to 2.0. Two series of experiments were conducted. The first series was distinguished by the fact that the filling coefficient of three thermosiphons with an internal diameter of 9 mm varied from 0.3 to 0.8 with the same length of the heating zone of 200 mm. The second series of experiments was carried out on thermosiphons with internal diameters of 3 mm and 5 mm. With the same amount of heat carrier, the length of the heating zone changed from 45 mm to 200 mm. As a result of research, it was determined that the total thermal resistance of thermosiphons is influenced by both their geometric factors (internal diameter and filling coefficient) and the type of heat carrier. The main factor that influenced the value of thermal resistance was also the transmitted heat flux. An increase in heat flow led to a significant decrease in thermal resistance. The maximum heat flux was determined with minimal thermal resistance. To calculate the value of the thermal resistance of thermosiphons, two dimensionless dependences were derived, which hold for two ranges of Reynolds numbers. For small Reynolds numbers (until 2000), which characterize the beginning of the action of vaporization centers and their gradual increase, the degree indicator was –0.8, and for larger Reynolds numbers, up to critical phenomena, the degree indicator was at the level of –0.3.
Reducing the biogenic corrosion of concrete in a pigsty by using disinfectants
Authors: Shkromada Oksana , Fotina Tatiana , Dudnyk Yevheniia , Petrov Roman , Levytska Viktoriya , Chivanov Vadym , Bogatko Nadiya , Pikhtirova Alina , Bordun Olexandr 
Published: September 2022

The object of this study is the regularity of changes in the biogenic destructive effect of microorganisms on the concrete structural elements of livestock facilities due to the use of the original liquid phase mixture of disinfectant based on aldehyde and surfactant.
Microorganisms use construction materials as a substrate for growth and nutrition; they produce citric acid, which leads to a change in the composition and morphology of hydrated cement new formations.
The composition of the microflora of the pigsty has been determined, and the minimum concentration of disinfectant based on glutaraldehyde and didecyl dimethyl ammonium chloride was found. By the TPD MS method, a decrease in the intensity of carbon dioxide (CO2) release in concrete samples during the heating of the sample to 900 °C was proved, compared to the control intact corrosion sample. Electron microscopy of concrete samples shows the presence of destructive changes and colonies of micromycetes. It was established that calcite was intensively released in the control sample of concrete, which retained its integrity and was not subjected to corrosion when heated to a temperature of 600 °C. Electron microscopy confirms the preservation of the homogeneous structure of concrete.
The use of a disinfectant based on glutaraldehyde and didecyl dimethyl ammonium chloride at a concentration of 1 % destroys colonies of micromycetes, 2 % – the shell of microorganisms, and 3 % – biofilm. Treatment of concrete with a disinfectant at a concentration of 3 % destroys microorganisms Aspergillus fumigatus and Penicillium oxalicum, inhibits the process of biological corrosion of concrete, and strengthens the structure of concrete.
The results of the experiment can be applied to inhibit the corrosion of concrete and extend the life of building structures made of concrete through the use of a disinfectant based on aldehyde and didecyl dimethyl ammonium chloride at a concentration of 3 %.
Indentifying the effect of micro friction stir spot welding (µFSSW) parameters on weld geometry, mechanical properties, and metallography on dissimilar materials of AZ31B and AA1100
Authors: Membala Semuel Boron , Sutresman Onny Sutyono , Arsyad Hairul , Syahid Muhammad , Widyianto Agus 
Published: September 2022

Micro-friction stir spot welding (µFSSW) is one type of welding that is suitable for joining lightweight materials. One of the challenges in joining lightweight materials with µFSSW is that the material is easily perforated, or the join is not strong enough, so it is necessary to select the right µFSSW parameters. In this article discusses about investigates the micro-Friction Stir Spot Welding (µFSSW) parameters on weld geometry, mechanical properties, and metallography on dissimilar materials of AZ31B and AA1100. The material thickness of the AZ31B and AA100 is 0.5 mm and 0.32 mm, respectively. The µFSSW tool is made of high-speed steel (HSS) with a pin diameter of 0.25 mm and a shoulder diameter of 0.5 mm. The constant process parameters of the µFSSW joint used, i. e., plunge depth, dwell time plunge rate, and high tool rotational speed of 33,000 rpm. Welding test results include weld geometry, mechanical properties, and metallography. Weld geometry testing to determine the weld nugget diameter. The mechanical properties test was shear tensile test and cross tensile test, while the metallographic test included macrostructure and microstructure observations. The results of the FSSW weld geometry show that at a dwell time of 700 milliseconds and a plunge depth of 600 microns, the weld pin diameter and weld shoulder diameter are close to the pin diameter and the diameter of the shoulder tool used. Dwell time and plunge depth has a significant effect on tensile strength. The maximum shear and cross loads achieved were 387±17 N and 29±2 N, respectively. Intermetallic compounds (IMC) are observed at the interface of the two materials, while a dwell time of 700 milliseconds give the effect of cracks on the inside of the weld
Improving the technique for assessing the condition and predicting the wear of the rock destruction tool equipment
Authors: Grydzhuk Jaroslav , Dzhus Andriy , Yurych Andriy , Yurych Lidiia , Dorokhov Maksym , Livinskyi Andrii 
Published: September 2022

To ensure the trouble-free operation of the rock-destroying tool, the peculiarities of its interaction with the rock at different stages of work must be additionally studied. Still unexplored in full is the relationship between the state of the equipment of the rock-destroying tool and the oscillatory processes during the operation of the drilling tool. The basic dependences for determining the wear indicators of the equipment of the rock-destroying tool have been proposed. The scheme for implementing the method of assessing the condition and predicting the wear of equipment, taking into account the peculiarities of its interaction with the rock, has been improved. Underlying its implementation is the presence of a law of change of at least one generalized coordinate of an arbitrary cross-section of a drilling tool. Bench experimental studies were carried out, according to the results of which the dependence of the depth of the face deepening on the mode parameters of drilling and the geometry of the equipment was established. It was found that the wear of the cutter by 1 mm causes a decrease in the amplitude of longitudinal oscillations by an average of 1.4 times. The obtained functions of deepening the face were used to determine the energy indicators of the process of rock destruction. Given the peculiarities of the implementation of the experiment, the work and power of the axial load for the destruction of the rocks of the pit were used for such indicators. It should also be noted that the construction of numerical models is necessary for a complete assessment and prediction of the wear of rock-destructive tools. They should reflect the mechanical system and provide the ability to obtain the values of parameters that are not determined by the results of a laboratory experiment.
Development of methods for the study of dicyclomine hydrochloride in combination with paracetamol as an object of forensic-pharmaceutical examination
Authors: Bevz Olena , Sych Igor , Fedosov Andrii , Vislous Olha , Sych Irina , Kryvanych Olga , Kobzar Nataliia , Perekhoda Lina 
Published: September 2022

The aim. Selection and development of methods for the tasks of forensic pharmaceutical examination as case materials suspected of falsification or non-medical use of dicyclomine hydrochloride in combination with paracetamol in the form of tablets.
Materials and methods. The study presents the developed methods of detection and identification of dicyclomine by TLC, IR spectroscopy and GC-MS, which were performed using reagents that meet the EP, USP and USPU requirements, Class A glassware and qualified devices.
Identification by IR spectroscopy was performed in the range from 500 to 4000 cm-1 on the device “Nicolet 380 FT-IR Spectrometer by Thermo Fisher Scientific”.
TLC was performed on Sorbfil plates for TLC-PET-H-UV and Sorbfil plates for TLC-AF-UV (CJSC “Sorbpolymer”, Russia). The following systems were used as mobile phases: dioxane-chloroform-acetone-25 % ammonia solution (47.5:45:5:2.5); toluene-acetone-ethanol-25 % ammonia solution (45:45:7.5:2.5); ethyl acetate-methanol-25 % ammonia solution (17:2:1)). The resulting chromatographic zones were detected by irradiation with UV light and further treatment with color reagents (30 % iron (III) chloride solution; Dragendorff's reagent modified by Munier; Marquis reagent; Froehde reagent; Mandelin reagent; FPN reagent).
Analysis by gas chromatography with mass detection was performed using a gas chromatograph with a mass spectrometric detector GCMS-QP2020. Data were analyzed using the program: GCMSsolution, LabSolutions Insight (Shimadzu Corporation, Tokyo, Japan).
Results. For the first time, the conditions for the extraction of dicyclomine hydrochloride from aqueous solutions were studied and the optimal conditions for their isolation as an object of forensic pharmaceutical examination is defined. The method of detection of dicyclomine hydrochloride and paracetamol in the drug “Trigan-D” by the methods of thin-layer chromatography, gas-liquid chromatography and chromato-mass spectrometry was developed, and the detection limits of the substances under study were determined.
Conclusion. The developed methods for dicyclomine hydrochloride in the form of tablets with paracetamol meet the requirements of the current legislation of Ukraine and the Ministry of Justice of Ukraine. The data obtained prove the high sensitivity and reproducibility of the methods and prove the possibility of their introduction into the practice of forensic pharmaceutical examination
Research of sound insulation frequency response for a multilayer inhomogeneous wall structures
Authors: Zaretskyi Vladyslav , Bida Dmytro 
Published: September 2022

The object of research is the amplitude-frequency characteristic of sound insulation of multi-layer heterogeneous structures. One of the most problematic places is the calculation methodology, due to the existence of standards such as ISO, DBN, which have some differences between them, and software, the calculation methodology of which is not fully known, due to the copyright of the latter.
Using the modeling method in the INSUL software complex, the amplitude-frequency characteristics of the sound insulation of the partition walls between the halls were obtained. On-site measurements were carried out on a real object identical to the simulated fence constructions presented by the MULTIPLEX cinema in the DAFI shopping center in Dnipro (Ukraine). The calculation methodology of the INSUL software is completely unknown. According to information from open sources, it can be concluded that linear modeling of the amplitude-frequency characteristic is used. The measurements were carried out according to DBN B.1.1-31:2013. Data obtained theoretically, during modeling, and experimentally are compared with each other. The expediency of taking into account the results obtained with the help of the INSUL software when writing a new methodology for the state standard or for improving the latter is considered. Comparing real and simulated amplitude-frequency characteristics, it is possible to conclude that the INSUL software complex is not accurate at high frequencies. This phenomenon may be related to the inherent resonances of the existing partition, or to the quality of the installation, which can be equated to a setup error, due to the lack of possibility of influencing the quality of the construction process of the measurement object. A possible error occurs when the soundproof partition is violently connected to the existing structures of the building, or due to the presence of resonating technical elements in the cinema hall (air ducts, metal structures of the stage and seats, etc.). This error is not influential due to the not significantly small wavelength in the frequency of 3000–8000 Hz. Therefore, as a conclusion, the INSUL software can be used in the development of the methodology of state standards for sound insulation in buildings.
Study of correlation between daily calorie intake (DCI) and body composition in type 2 DM patients using bioimpedance analysis as a screening tool
Authors: Dube Sunil R , Dube Manjree , Sabnis Shwet , Damle Sayali 
Published: September 2022

Evaluation of body composition (BC) represents a valuable screening tool to assess nutritional status among diabetic patients. The most commonly used methods to evaluate BC in the clinical practice are based on bicompartmental models such as dual energy X-ray absorptiometry (DXA) etc. Factors like daily caloric intake (DCI), percentage of total body water (%TBW), muscle mass and bone mass and the changes that occur in these components with age could be related to the development of type 2 diabetes mellitus (T2DM). The objective of the study is to use Bioimpedance Analysis (BIA) as a screening tool to assess the correlation between these parameters in type 2 diabetic patients. This study was conducted on 200 T2DM patients aged 25-45 years for a duration of 6 months in an urban out-patients clinic after obtaining proper informed consent and ethics committee approval. A multifrequency body composition monitor TANITA MC 980 was used to analyse muscle mass, bone mass and %TBW. The impedance readings were entered into medically researched formulae to calculate body composition. The results were correlated with DCI. The study results showed a strong correlation between DCI and muscle mass (p&#60;0.01). Scatter diagram analysis showed that muscle mass has a significant correlation with DCI at p&#60;0.01. No significant correlation was observed between bone mass, and metabolic age with DCI. Joint regression analysis by ANOVA showed a significant correlation between %TBW and muscle mass with DCI at p&#60;0.05. This study showed a strong correlation between DCI and increasing muscle mass and basal metabolic rate among diabetic patients. It also shows that BIA is a useful tool for clinical studies in assessing the correlation between DCI and body composition among type 2 diabetic patients.
Anthropometry based nutritional status of unmarried adolescent girls (15-19 Y) of urban Vadodara, Gujarat, India
Authors: Gandhi Hemangini , Dhannalal Taruna , Vishwa Rathi 
Published: September 2022

: The word ‘adolescence’ is derived from the Latin verb ‘adolescere’, which means “grow to maturity.” The World Health Organization (WHO) defines adolescents as young people aged 10-19 years. There are about 1.2 billion adolescents, a fifth of the world’s population. Nutrition is key to unlocking the potential of investment in the health of women, children and adolescents. After obtaining necessary permission from Vadodara Mahanagar Seva Sadan 250 unmarried adolescent girls aged 15-19 years were enrolled in the study. Data on Socio-Economic background (SES) for enrolled girls’ families, Weight and Height was collected using pre-tested semi structured questionnaire. Thinness was assessed using age and sex specific WHO cut-offs for BMI for age (5-19Y). Stunting was identified using WHO cut-offs for Height for age criteria. Mean age of the adolescent girls was 16.3 years. 62% of the adolescent girls were attending school. 70% of adolescent girls were belonging to reserve category (SC/ST/OBC). It was found that 15.2 % and 6.4% of the girls were moderately and severely thin respectively. Only 13.2 % adolescent girls had normal BMI for age. Prevalence of stunting was 80.8%. Thinness and stuntingin unmarried adolescent girls (15-19 years) of urban area is a cause of concern.
ПРО ПЕРСПЕКТИВИ РОЗВИТКУ КРИМІНАЛІСТИЧНОЇ МЕТОДОЛОГІЇ
Authors: Ланцедова Юлія , Грекова Лілія 
Published: September 2022

Мета: запропонувати найбільш обґрунтований варіант класифікації криміналістичних методів і розуміння сутності кожного з власне криміналістичних методів дослідження. Методи дослідження: порівняльно-правовий аналіз, пізнавально-аналітичний та ін. Результати: запропонований варіант класифікації криміналістичних методів і розуміння сутності кожного з базисних власне криміналістичних методів дослідження. Обговорення: на основі аналізу основних точок зору підтриманий та розвинений запропонований Ю.Д. Ткачем варіант класифікації криміналістичних методів дослідження на базисний метод дослідження, загальнонаукові методи і криміналістичні методи з подальшим розподілом останньої з груп методів на власне криміналістичні методи (базисні власне криміналістичні методи, загальні власне криміналістичні методи, часткові власне криміналістичні методи) та запозичені криміналістичні методи.
Звернуто увагу, що відмінність індивідуальної і групової ідентифікації засновано лише на кількості і якості на трасосприймальному об’єкті або всередині нього тих ідентифікаційних ознак, які дозволяють зробити висновок про їх належність лише конкретному трасоутворювальному об’єкту або тільки певної групи трасоутворювальних об’єктів.
КРИМІНОЛОГІЧНИЙ АНАЛІЗ ПОКАЗНИКІВ ВИМІРЮВАННЯ КРИМІНАЛЬНИХ ПРАВОПОРУШЕНЬ ПРОТИ БЕЗПЕКИ РУХУ ТА ЕКСПЛУАТАЦІЇ ТРАНСПОРТУ В УКРАЇНІ
Authors: Новіков Олег 
Published: September 2022

Мета: встановлення сучасного стану та тенденцій динаміки кримінальних правопорушень проти безпеки руху та експлуатації транспорту в Україні на підставі офіційних статистичних даних. Методологічну основу дослідження склали як загальнонаукові, так і специфічні статистичні методи пізнання (зокрема: статистичне спостереження, зведення і групування даних, абсолютні і відносні показники, табличний і графічний методи тощо). Результати: найбільша кількість кримінальних правопорушень проти безпеки руху та експлуатації транспорту виявляється у м. Києві, Дніпропетровській, Одеській, Харківській, Київській та Львівській областях, а найменше – у Луганській, Чернігівській, Тернопільській, Кіровоградській та Хмельницькій областях. За останні 5 років фіксується негативна динаміка досліджуваних кримінальних правопорушень. Обговорення: автор наголошує на необхідності проведення кримінологічних досліджень латентності кримінальних правопорушень проти безпеки руху та експлуатації транспорту.