bluuebunny/crossref_metadata_2025 huggingface dataset:
Bounded distance geodesic foliations in Riemannian planes
Authors: Ge Jian , Guijarro Luis
Published: April 2023

A conjecture of Burns and Knieper (1991) asks whether a 2-plane with a metric without conjugate points, and with a geodesic foliation whose lines are at bounded Hausdorff distance, is necessarily flat. We prove this conjecture in two cases: under the hypothesis that the plane admits total curvature, and under the hypothesis of visibility at some point. Along the way, we show that all geodesic line foliations on a Riemannian 2-plane must be homeomorphic to the standard one.
Constant scalar curvature Kähler metrics on ramified Galois coverings
Authors: Arezzo Claudio , Della Vedova Alberto , Shi Yalong
Published: April 2023

We give sufficient conditions for the existence of Kähler–Einstein and constant scalar curvature Kähler (cscK) metrics on finite ramified Galois coverings of a cscK manifold in terms of cohomological conditions on the Kähler classes and the branching divisor. This result generalizes previous work on Kähler–Einstein metrics by Li and Sun [C. Li and S. Sun, Conical Kähler–Einstein metrics revisited, Comm. Math. Phys. 331 2014, 3, 927–973], and extends Chen–Cheng’s existence results for cscK metrics in [X. Chen and J. Cheng, On the constant scalar curvature Kähler metrics (II)—Existence results, J. Amer. Math. Soc. 34 2021, 4, 937–1009].
Multiplicative (generalized)-reverse derivations in rings and Banach algebras
Authors: Koç Sögütcü Emine
Published: April 2023

In this work, the subject of ideal in a semiprime ring with multiplicative
(generalized)- reverse derivations studied is included. We give new
essential results for researchers in this field and generalize some results
found in the literature. Also, the application of continuous reverse
derivations in Banach algebras is discussed for the first time.
Role of α-Fe2O3 nano-particles in protecting wood from ultraviolet light degradation
Authors: Yi Tengfei , Morrell Jeffrey J.
Published: April 2023

The incorporation of nano-particles into coatings to protect wood against UV light has tremendous potential for improving coating performance. However, the understanding of the mechanisms by which these particles function on wood surfaces remains limited. The distribution and potential chemical interactions between alpha Fe2O3 and wood were studied. The ability of different sizes of Fe2O3 particles to intercept various wavelengths of light was assessed using ultraviolet/visible (UV–vis) spectroscopy using TiO2 and ZnO particles for comparison. All particles intercepted UV light, but α-Fe2O3 also intercepted a portion of the visible spectrum which might help explain its better performance. Scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM-EDS) analysis of α-Fe2O3 nano-particle distribution on different wood orientations of radiata pine (Pinus radiata D. Don) and shining gum (Eucalyptus nitens) showed that iron particles were uniformly distributed on both pine and shining gum, but provided better UV protection to the more permeable radiata pine surfaces. Characterization of chemical interactions between α-Fe2O3 and isolated lignin and cellulose by Fourier Transform Infrared Spectroscopy (FTIR) suggested substantial interactions between these particles and lignin components, but little interaction with cellulose. The results suggest that the role of nano-particles in the UV protection of wood surface is to intercept and disperse the light energy while interacting with the wood.
Euler–Maruyama algorithm in estimating UGV path and location in nuclear emergency and security applications
Authors: Zaky Hany Nasry , Abd Elfatah Mohamed G. , El-Mongy Sayed A. , Abdel-Rahman Mohamed A.E.
Published: April 2023

Mobile Robots (MR) are currently used across a variety of different sectors and have military, nuclear and industrial applications among others. In unmanned systems, teleoperation sensors, navigation instruments, control systems and radiation sensors can be fixed on the MR to perform required tasks such as radiological scanning, identifying, and surveying the contaminated environment that has been exposed to radiation. In this work, an estimation of the mobile robot location and the optimum path for time-delay compensation for MR teleoperation are investigated. As the MR teleoperation has a stochastic nature, the kinematics equations are modeled using stochastic differential equations (SDEs). Afterwards, these SDEs are solved using Numerical algorithms such as Euler–Maruyama algorithm which is used to approximate SDEs solution with the aid of MATLAB. Additionally, the results are discussed and depicted in tables and figures. Finally, the simulated results for the solution are performed and are found to highly agree with the ideal path of the simulated MR. This result is of great importance to be used in the case of nuclear emergency response and mitigation.
Biocompatibility of biomaterials and test methods: a review
Authors: Karakullukcu Altun Buse , Taban Emel , Ojo Olatunji Oladimeji
Published: April 2023

Biomaterials research has gained considerable momentum recently. The development of technology and the changing human lifestyles have also changed human health needs. The developed materials for use in different areas like in medical products and living bodies have necessitated adding biocompatibility to the mechanical, physical, and chemical properties of these materials. This article is a review of the concept and evaluation of biocompatibility. It explains how biomaterials change with the development of technology, human changing lifestyles, and needs, and how these materials are developed with the same technology. It contains what biocompatibility is, the factors that affect biocompatibility, what can happen in case of low biocompatibility, and the standards and work plans required for tests such as hemocompatibility, genotoxicity, toxicokinetic, and immunotoxicology for biocompatibility..
Effect of boric acid addition to seawater on wear and corrosion properties of ultrashort physical vapor deposited Ti layer on a 304 stainless steel
Authors: Karabeyoğlu Sencer Süreyya , Eker Bülent , Yaman Paşa , Ekşi Olcay
Published: April 2023

AISI 304 stainless steel specimens are deposited with Ti using physical vapor deposition method for 3, 5, and 8 min. Then, specimens are subjected to wear test with 10 and 20 N applied loads in seawater and boric acid reinforced seawater. Optical microscope and scanning electron investigations showed that ultrashort PVD process formed non-uniform Ti deposit zones on the substrate. Abrasive wear mechanism is observed for 10 N applied load and increasing the applied load to 20 N transformed the wear into adhesive which is attributed to counteract dynamic reaction of the surface. Besides, boric acid addition to seawater lowered the wear rate and coefficient of friction for all tests and stick-slip phenomenon is removed in boric acid addition. In corrosion properties, boric acid addition improved the corrosion resistance of the specimens.
Heat treatment effects on near threshold region for AISI 4340 steels
Authors: Çalışkan Salim , Gürbüz Rıza
Published: April 2023

The microstructure effect is critical in the near-threshold region in terms of fatigue crack propagation. Despite numerous studies on the crack growth phenomenon in the literature, there is still no comprehensive understanding of the mechanism behind it. The fatigue crack growth mechanism occurs in the plastic zone region, which is quite small in size; the order is regarded as microstructural units, particularly at low stress intensities. Microstructural differences caused by heat treatment methods are frequently attributed to changes in monotonic and yield strength, resulting in differences in plastic zone size. The driving force required for crack growth under alternating loading is proportional to the plastic zone size ahead of the crack tip. When the microstructure is modified using isothermal transformations, the stress intensity near the threshold and corresponding crack propagation rates were found to be affected by stress ratio, material yield strength, particle size distribution, and impurity segregation. The crack growth threshold ΔK
0 is discovered to be inversely related to steel strength, and a relationship between ΔK
0 and cyclic yield stress is established. In the scope of this paper, annealed and tempered conditions were investigated to assess near threshold behavior for AISI 4340 steel. Effect of microstructure will be detailed around low stress intensities via performed crack growth tests.
Electrochemical photonics: a pathway towards electrovariable optical metamaterials
Authors: Edel Joshua B. , Ma Ye , Kornyshev Alexei A.
Published: April 2023

This review article focuses on the latest achievements in the creation of a class of electrotuneable optical metamaterials for switchable mirrors/windows, variable colour mirrors, optical filters, and SERS sensors, based on the voltage-controlled self-assembly of plasmonic nanoparticles at liquid/liquid or solid/liquid electrochemical interfaces. Practically, these experimental systems were navigated by physical theory, the role of which was pivotal in defining the optimal conditions for their operation, but which itself was advanced in feedback with experiments. Progress and problems in the realisation of the demonstrated effects for building the corresponding devices are discussed. To put the main topic of the review in a wider perspective, the article also discusses a few other types of electrovariable metamaterials, as well as some of those that are controlled by chemistry.
O QUE É POSSÍVEL APRENDER ASSISTINDO SÉRIES
Authors: Silva José Rodolfo , Do Carmo Melo Iuli , Ferrari Anderson
Published: April 2023

As pedagogias culturais oportunizam um olhar diferenciado para educação prezando pelas múltiplas formas de ser, estar, ensinar e aprender dos sujeitos. Valendo-nos dessa possibilidade e apoiados na perspectiva pós-estruturalista, o presente artigo tem como objetivo refletir sobre a série Anne with E. Uma produção que, baseada no livro de Anne de Green Gables, que traz elementos discursivos e cenográficos, para se pensar as relações de gênero e explorar as potencialidades das pedagogias culturais. Desse modo, quando questionamos o que é possível aprender assistindo séries? Nos concentrando na representação de feminilidade expressa na personagem Anne, analisamos de que forma como os modos de endereçamento[1], da produção podem afetar masculinidades e feminilidades educando para possibilidades de desconstrução de aspectos agressivos referente a masculinidades e submissão de feminilidades atribuídos como naturais de caráter essencialista produzindo circunstâncias de violência e discriminação. Portanto, nos concentramos na representação de feminilidade expressa por Anne.
A Targeted, Low-Throughput Compound Screen in aDrosophilaModel of Neurofibromatosis Type 1 Identifies Simvastatin and BMS-204352 as Potential Therapies for Autism Spectrum Disorder (ASD)
Authors: Dyson Alex , Ryan Megan , Garg Shruti , Evans D. Gareth , Baines Richard A.
Published: April 2023

Autism spectrum disorder (ASD) is a common neurodevelopmental condition for which there are no pharmacological therapies that effectively target its core symptomatology. Animal models of syndromic forms of ASD, such as neurofibromatosis type 1, may be of use in screening for such treatments.Drosophilalarvae lackingNf1expression exhibit tactile hypersensitivity following mechanical stimulation, proposed to mirror the sensory sensitivity issues comprising part of the ASD diagnostic criteria. Such behavior is associated with synaptic dysfunction at the neuromuscular junction (NMJ). Both phenotypes may thus provide tractable outputs with which to screen for potential ASD therapies. In this study, we demonstrate that, while loss ofNf1expression within the embryo is sufficient to impair NMJ synaptic transmission in the larva, constitutiveNf1knock-down is required to induce tactile hypersensitivity, suggesting that a compound must be administered throughout development to rescue this behavior. With such a feeding regime, we identify two compounds from a targeted, low-throughput screen that significantly and consistently reduce, but do not fully rescue, tactile hypersensitivity inNf1P1larvae. These are the HMG CoA-reductase inhibitor simvastatin, and the BKCachannel activator BMS-204352. At the NMJ, both compounds induce a significant reduction in the enhanced spontaneous transmission frequency ofNf1P1larvae, though again not to the level of vehicle-treated controls. However, both compounds fully rescue the increased quantal size ofNf1P1mutants, with simvastatin also fully rescuing their reduced quantal content. Thus, the further study of both compounds as potential ASD interventions is warranted.
Microbiologia Forense: uma revisão
Authors: Weçoski Déborah Aline Diniz , Dalzoto Patricia
Published: April 2023

A microbiologia forense é um ramo das ciências forenses que está ganhando crescente atenção como ferramenta investigativa. Atuando em conjunto com outras áreas, a microbiologia forense visa à análise e ao estudo de microrganismos que possam fornecer explicações sobre a ocorrência de crimes e servir como evidência em julgamentos. Visando fornecer um panorama sobre a microbiologia forense no mundo e no Brasil, foi realizada uma revisão de publicações sobre o tema dos últimos 22 anos (2000-2022), abordando o emprego de bactérias, fungos e vírus como ferramentas forenses. Foram encontradas 50 publicações, dentre os quais 39 foram publicadas em inglês e 11 em português, evidenciando a escassez de publicações sobre o tema no Brasil. Por meio da compilação dos artigos encontrados, esta revisão aborda preferencialmente bioterrorismo, biocrimes, o uso de bactérias da pele como forma de identificação humana, o microbioma humano na determinação do intervalo post-mortem e o emprego de fungos nas análises forenses.
Análise de assinaturas estáticas produzidas em tela
Authors: Okado Jessica Baleiro , Diana Mariana Cepollaro
Published: April 2023

Este trabalho comparou assinaturas físicas em papel e caneta e produzidas em tela de celular com diferentes instrumentos: dedo indicador e mínimo livres, dedo em posição de pinça (“finger pen adaptada”), e caneta stylus em tela de celular, sem treino prévio e com treino de dois minutos. Foram analisados diferentes elementos discriminadores da escrita (morfologia, alógrafos, método de construção, andamento, espaçamentos interliterais e intervocabulares, conexões, alinhamentos, inclinação, calibre, proporção, velocidade, dinamismo, qualidade do traçado, ataques e remates, valores angulares e curvilíneos). As amostras foram produzidas por 20 voluntários adultos com escrita automatizada. De maneira geral, os elementos discriminadores da escrita que mais apresentaram alteração foram: qualidade do traçado, valores angulares e curvilíneos, calibre e dinamismo. Os que apresentaram menor alteração em relação às assinaturas em papel e caneta foram o método de construção e alógrafos utilizados. Os resultados vão de encontro a literatura, reforçando que a ponta dos dedos não possui a mesma precisão e acurácia que o uso de caneta, apresentando menor reprodutibilidade de traçado. O instrumento em tela mais comparável com papel e caneta foi uso de caneta stylus. Com relação ao treino, os resultados corroboram achados anteriores de que o treino auxilia na adaptação do movimento grafomotor, em especial no caso de dedos desprovidos de memória muscular. Observou-se ainda que assinaturas totalmente estilizadas apresentaram menor mudança qualitativa que assinaturas legíveis.
Risk of complications after core needle biopsy in pheochromocytoma/paraganglioma
Authors: Zhang Liang , Åkerström Tobias , Mollazadegan Kazhan , Beuschlein Felix , Pacak Karel , Skogseid Britt , Crona Joakim
Published: April 2023

Core needle biopsy (CNB) has been used with caution in pheochromocytoma and paraganglioma (PPGL) due to concerns about catecholamine-related complications. While it is unclear what scientific evidence supports this claim, it has limited the acquisition of biological samples for diagnostic purposes and research, especially in metastatic PPGL. We performed a systematic review and individual patient meta-analysis to evaluate the risk of complications after CNB in PPGL patients. The primary and secondary objectives were to investigate the risk of death and the occurrence of complications requiring intervention or hospitalization, respectively. Fifty-six articles describing 86 PPGL patients undergoing CNB were included. Of the patients (24/71), 34% had metastases and 53.4% (31/58) had catecholamine-related symptoms before CNB. Of the patients (14/41), 34.1% had catecholamine excess testing prior to the biopsy. No CNB-related deaths were reported. Four patients (14.8%, 4/27) experienced CNB-related complications requiring hospitalization or intervention. One case had a temporary duodenal obstruction caused by hematoma, two cases had myocardial infarction, and one case had Takotsubo cardiomyopathy. Eight patients (32%, 8/25) had CNB-related catecholamine symptoms, mainly transient hypertension, excessive diaphoresis, tachycardia, or hypertensive crisis. The scientific literature does not allow us to make any firm conclusion on the safety of CNB in PPGL. However, it is reasonable to argue that CNB could be conducted after thorough consideration, preparation, and with close follow-up for PPGL patients with a strong clinical indication for such investigation.
An Investigation on the Relationship Between Mineral Nutrition of Lemon and Rumple
Authors: Kocamaz Cengiz , Eşitken Ahmet
Published: April 2023

This study investigated the relationship between Rumple and tree crown parts regarding direction, fruit development stages and fruit rind nutrient content. A Lemon orchard on which Rumple disorders have shown severely were chosen among Erdemli and Silifke region where the majority of grown lemon cultivar is Kütdiken. In this orchard, from healthy and contaminated trees samples were taken from the South and West half parts of crown and the North and East parts of the crown separately. Also, fruit samples were taken at four fruit development stages which were hazelnut-sized fruit, end of fruit enlargement, the beginning of maturation and fully mature fruit stages. The rind of samples fruit was analyzed, and their content of N, P, K, Ca, Mg, S, Mn, Fe, Zn, B, Cl and Na was determined. PCA was used to analyze these data. Biplot scheme of the 2nd Sampling from the part one-half of the trees which includes the South and West directions, that is, from the Healthy (G2S) and Rumple signed trees (G2B) taken were examined. The increase in K, Zn, Fe, Ca, and Mg is associated with Na, P and Cl concentration reduction. Besides this, in this period, it was observed that fruit rind has higher N, S, Mn and B content which were taken from part one, that is, the South and West sides, of healthy plants. The relationship identified here is important because Rumple’s symptoms become visible after this stage.
Investigation of the Effects of Potassium on Some Agronomic Traits in Dry Bean Genotypes
Authors: Yıldırım Hasan , Önder Mustafa
Published: April 2023

This study was carried out to investigate the effects of 5 different doses of potassium (0, 15, 20, 25 and 30 kg da-1) on some yield and important yield components on 6 different dry bean genotypes of bean [Phaseolus vulgaris L.] in Yunak Town – Konya City (TURKIYE) ecological conditions. was made in 2018. The aforementioned research was designed with 3 replications based on "Split Plots in Randomized Blocks Trial Design". According to the results of the research, it has been determined that potassium applications at different doses are statistically significant in terms of emergence time, flowering time, pod setting time, and vegetation period. As a result of the research; the emergence period was 6.33 – 15.67 days, the flowering period 32.00 – 71.67 days, the pod setting time 48.67 – 88.00 days, the vegetation period 84.67 – 118.00 days, the spad value 41.57 – 53.87 spad, number of main branches per plant 2.90 – 5.00, first pod height 9.40 – 18.40 cm, root neck diameter of 4.97 – 31.50 mm, the number of pods per plant varied between 13.30 – 42.00, the number of seeds per pod varied between 3.20 – 5.67 values. When evaluated in general, emergence time, flowering time, pod setting time increased with increasing potassium application, while vegetation time, and first pod height (maximum value at 15 kg da-1 dose) values decreased. In the study, all of the shortest duration values in terms of all phonological observations emerged in the Akkiraz genotype, which was applied at a fertilizer dose of 15 kg da-1. The highest value for the first pod height was determined in the 25 kg da-1 fertilizer dose X Nirvana genotype, the highest pod number value in the 20 kg da-1 fertilizer dose X Nirvana genotype, the highest seed number value in 15 kg da-1 fertilizer dose X Nirvana genotype. For the consistency of the research findings, it can be said that longer-term studies and evaluation of different genotypes in different ecologies are required.
Survey of Herd Management on Conventional Dairy Farms in North Algeria
Authors: Meskini Zakaria , Dahou Abdelkader , Radja Djamaia Sabiha , Yerou Houari , Homrani Abdelkader
Published: April 2023

A survey was conducted to evaluate husbandry practices and herd health management in dairy farms in Mostaganem province, located in north Algeria. Data was collected through face-to-face interviews with 56 farmers, followed by a visit to the production environment of the dairy cows. The results showed that 64% of farmers feed their cows a basic ration of oat hay and straw, while 32% use corn silage. On average, 9.85 ±0.32 kg of concentrate was distributed per dairy cow. Most farms didn’t have efficient forage production, while only 21% of them produced all the necessary forage. The average milk production per cow on the surveyed farms was 18.19 ±0.45 L, with a lactation length of 293.5 ±1.65 days. The cows were milked using a portable milking machine in poor hygienic conditions. Estrus detection was performed occasionally by farmers, and natural breeding was the main method of insemination, occurring at a rate of 63%. The voluntary waiting period was on average 76.6 ±3.56 days, and the average calving interval was 14.35 ±0.2 months. The culling rate in dairy farms was 23% on average, with the most common reasons for culling being mastitis and age at a rate of 23% and 21% respectively. The main diseases reported by the farmers were mastitis (82%), followed by lameness (57%). All surveyed farmers vaccinated their herds against only rabies and foot-and-mouth disease. This survey can help to identify the challenges and potential opportunities for improving dairy farm productivity and welfare in the Mostaganem province. The agricultural and economic sectors should work with farmers towards improving dairy farming techniques and practices, using efficient feeding systems and enhanced technology of dairy herd management, providing training and education to farmers, and resolving herd health issues to increase the economic efficiency of the dairy industry.
TOPSIS Methods for Probabilistic Hesitant Fuzzy MAGDM and Application to Performance Evaluation of Public Charging Service Quality
Authors: Qi Quan-Song
Published: April 2023

The performance evaluation of public charging service quality is frequently viewed as the multiple attribute group decision-making (MAGDM) issue. In this paper, an extended TOPSIS model is established to provide new means to solve the performance evaluation of public charging service quality. The TOPSIS method integrated with FUCOM method in probabilistic hesitant fuzzy circumstance is applied to rank the optional alternatives and a numerical example for performance evaluation of public charging service quality is used to test the newly proposed method’s practicability in comparison with other methods. The results display that the approach is uncomplicated, valid and simple to compute. The main results of this paper: (1) a novel PHF-TOPSIS method is proposed; (2) the extended TOPSIS method is developed in the probabilistic hesitant fuzzy environment; (3) the FUCOM method is used to obtain the attribute weight; (4) the normalization process of the original data has adapted the latest method to verify the precision; (5) The built models and methods are useful for other selection issues and evaluation issues.
Existence of a solution for a nonlinear integral equation by nonlinear contractions involving simulation function in partially ordered metric space
Authors: Lo'Lo' Parvaneh , Shams Maryam , De la Sen Manuel
Published: April 2023

In a recent paper, Khojasteh et al. presented a new collection of simulation functions, said Z-contraction. This form of contraction generalizes the Banach contraction and makes different types of nonlinear contractions. In this article, we discuss a pair of nonlinear operators that applies to a nonlinear contraction including a simulation function in a partially ordered metric space. For this pair of operators with and without continuity, we derive some results about the coincidence and unique common fixed point. In the following, many known and dependent consequences in fixed point theory in a partially ordered metric space are deduced. As well, we furnish two interesting examples to explain our main consequences, so that one of them does not apply to the principle of Banach contraction. Finally, we use our consequences to create a solution for a particular type of nonlinear integral equation.
Existence of multiple positive solutions for a third-order boundary value problem with nonlocal conditions
Authors: Smirnov Sergey
Published: April 2023

We study the existence of multiple positive solutions for a nonlinear third-order differential equation subject to various nonlocal boundary conditions. The boundary conditions that we study contain Stieltjes integral and include the special cases of m-point conditions and integral conditions. The main tool in the proof of our result is Krasnosel’skii’s fixed point theorem. To illustrate the applicability of the obtained results, we consider examples.
The Relationship between Internality and Self-development of Psychology Students: the Effect of Optimistic Attributional Style
Authors: Ketler-Mytnytska Tetyana , Shevchenko Nataliia
Published: April 2023

The article represents the research of relationship between internality and self-development in the case of the different levels of optimistic attributional styles. The sample consists of psychology students of Ukraine. The strong positive impact of internality on self-development under conditions of medium optimistic attribution has been revealed. A decrease has also been set in self-development of psychology students with high internality in the case of a highly developed optimistic attributional style. It has been established that the psychology students with a medium level of optimistic attributional style and a high level of internality have the highest scores of self-development. The lowest self-development is typical of psychology students with high internality and pessimistic attributional style.
Strengthening the Treatment and Rehabilitation Infrastructure, Demand Reduction and Prevention of Substance Abuse in Northern Cyprus
Authors: Şimşek Melike , Tekyaprak Nilgün
Published: April 2023

In this study, the data of many sources/institutions working on cigarettes, alcohol and other psychoactive substances were used in Northern Cyprus by using the document analysis technique. In order to carry out a comprehensive study, official institutions and non-governmental organizations were called through the Anti-Drug Commission Presidency and the data they had were reached. Anti-Drug Commission's studies were examined under 4 themes. These themes were handled as Community-Based, School-Based, Law Enforcement/ Justice-Based and Health Care-Based intervention studies. As a result of this study it is seen that "Northern Cyprus Drugs and Addiction Report 2021" aims to provide an overview of the drug situation, which is necessary to develop effective actions for today's problems, by contributing to the creation of a healthier and safer society against drugs and addictions in Northern Cyprus.
The relationship between normal glucose level of blood and people’s interest for watching cricket
Authors: Hassan Arslan
Published: April 2023

The purpose of current study was to correlate the glucose level of blood and people’s interest forwatching cricket. Blood glucose level is the quantity of sugar which is present within the blood of organisms.The body maintain the glucose level in blood for homeostasis. Glucose is present in every cell of body and it is stored in a liver and skeletal muscles. In humans, glucose is very necessary for normal functioning of body and tissues like the brain of humans. There are also different types of fans which are more interested in cricket and can do anything for cricket. We all know that cricket makes us perfect mentally as well physically. So, many parent advices their children to play games. Cricket is very easy game so mostly people play cricket. There is no scientific relation between people’s interest for watching cricket and glucose level of blood.
Aeroelastic Characteristics of Rotor Blades of Last Stage of a Powerful Steam Turbine
Authors:   Anatolii Pidhornyi Institute of Mechanical Engineering Problems of NAS of Ukraine, Kolodiazhna Liubov V. , Bykov Yurii A. ,   Anatolii Pidhornyi Institute of Mechanical Engineering Problems of NAS of Ukraine
Published: April 2023

Blades of powerful steam turbines are subjected to significant unsteady loads, which, in some cases, can lead to the appearance of self-excited oscillations or auto-oscillations. These fluctuations are extremely dangerous and negatively affect the life time of the blading. When developing new or upgrading existing turbine stages, it is necessary to carry out research on the aeroelastic behavior of the rotor blades. As a result of the modernization of a low-pressure cylinder of a 1000 MW steam turbine, the length of the rotor blades of the last stage increased to 1650 mm. In this regard, a numerical analysis of the aeroelastic characteristics of the last-stage rotor blades in the nominal operation mode was carried out. The analysis used the method of solving the coupled problem of unsteady aerodynamics and elastic blade vibrations, which allows the prediction of the amplitude-frequency spectrum of unsteady loads and blade vibrations in a viscous gas flow. The paper presents the results of numerical analysis of aeroelastic characteristics of the last stage rotor blades both for the mode of controlled harmonic oscillations with a given amplitude and inter-blade phase shift, and for the mode of coupled oscillations of the blades under influence of unsteady aerodynamic forces. The results of the simulation of coupled oscillations of blades for the first five natural forms are presented in the form of the time distribution of displacement of the blade peripheral cross-section, as well as the time distribution of forces and moments acting on the peripheral cross-section. The corresponding amplitude-frequency spectra of displacements and loads in the peripheral section are also given. The results of the calculations showed a positive damping of oscillations, the absence of flutter and auto-oscillations for the first five natural forms of oscillations of the blades in the nominal operation mode of the steam turbine
COMBINED CONTROL OF GEARLESS ARC-CORE SHIP RADAR ANTENNA ELECTRIC DRIVE WITH FUZZY LOGIC REGULATOR
Authors:   Institute of Electrodynamics of the National Academy of Science of Ukraine,  Peremohy Ave., 56, Kyiv, 03057, Ukraine, Stiazhkin V.P. , Zaichenko O.A. ,   Institute of Electrodynamics of the National Academy of Science of Ukraine,  Peremohy Ave., 56, Kyiv, 03057, Ukraine, Gavryluk S.I. ,   Institute of Electrodynamics of the National Academy of Science of Ukraine,  Peremohy Ave., 56, Kyiv, 03057, Ukraine, Ryzhkov O.M. ,   Institute of Electrodynamics of the National Academy of Science of Ukraine,  Peremohy Ave., 56, Kyiv, 03057, Ukraine, Teriaiev V.I. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”,  Peremohy ave., 37, Kyiv, 03056, Ukraine, Krasnoshapka N.D. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”,  Peremohy ave., 37, Kyiv, 03056, Ukraine
Published: April 2023

The synthesis of a fuzzy proportional-integral-differential speed regulator of the arc stator electric drive of the rotation of the radar station antenna with combined control was carried out. The structural diagram of the fuzzy regulator was developed, the input and output linguistic variables are defined, the rule base was compiled, the dependence surfaces of the output control variable on the input coordinates are obtained. A simulation model of an electric drive in the Matlab system with a synthesized fuzzy logic regulator based on a two-phase model of an asynchronous arc-stator motor was built. Modeling of the nominal and the most difficult mode of operation of the electric drive was carried out, graphs of transient processes were obtained, which confirm its operability even under conditions of extreme loads. Refreces 9, figures 7, table 1.
CALCULATION OF CORRECTIONS OF DIFFERENTIAL TWO-ELECTRODE CONDUCTIVITY CELLS WITH CALCULATED CONSTANT
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Peremohy ave., 56, Kyiv, 03057, Ukraine, Mikhal O.O. , Meleshchuk D.V. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Peremohy ave., 56, Kyiv, 03057, Ukraine, Stennik O.Y. ,   SE “Ukrmetrteststandart”,  Metrolohichna str., 4, Kyiv, 03143, Ukraine
Published: April 2023

The object of study is a differential two-electrode conductivity cell with a calculated constant, designed for the practical realization of the unit of length – a meter in national measurement standards of electrolytic conductivity of liquids. The differential cell consists of two tubes of the same diameter but different lengths. The article presents an idealized model for calculating cell constants and determining electrolytic conductivity. The presence of holes for filling the cell, caus-ing a distortion of the uniformity of the current density distribution in the middle of the cell, and a significant dielectric permeability of aqueous solutions lead to significant errors when measuring the resistance of liquid columns. The arti-cle presents mathematical expressions for calculating two types of corrections. First, the correction caused by the dis-tortion of the field uniformity due to the presence of the inlet and outlet holes of the cell. Secondly, the correction caused by the presence of bias currents in aqueous solutions of electrolytes. The appearance of a differential cell based on two tubes with a diameter of 9 mm and a length of 50 and 100 mm, respectively, which is being tested as a part of the national measurement standard of Ukraine, is given. References 7, figures 5, tables 2.
Problematyka bezpośredniego zgłaszania kandydatów na członków obwodowych komisji wyborczych
Authors:   Uniwersytet Szczeciński, Pyrzyńska Agata
Published: April 2023

The aim of the article is to analyze the solution that allows voters to report directly to a member of the district electoral commission (without the participation of the election committee), in particular to present the advantages of such a solution from the point of view of the fairness of the election. The indicated procedure is an interesting solution both from the point of view of the voter and the election administration. In the first case, it eliminates the need for the voter to manifest his political sympathies. In the second one, it regulates the procedure of supplementing the committee members in the event of vacancies. As part of this paper, an attempt was also made to answer the question of what potential this procedure may have in the context of improving the electoral process. The formal and legal method was used in the work.
Sądy konstytucyjne w państwach Kaukazu Południowego (Armenia, Azerbejdżan, Gruzja)
Authors:   Krakowska Akademia im. Andrzeja Frycza Modrzewskiego, Czachor Rafał
Published: April 2023

The functioning of the constitutional courts is a European standard, widely accepted also in post-Soviet countries. The following paper looks at the basic legal provisions of the constitutional courts in Armenia, Azerbaijan, and Georgia from a comparative perspective. While Armenia and Georgia undertake some democratic reforms, Azerbaijan remains a consolidated autocracy, what justifies such comparisons. It argues that despite being in line with European practice, there is no one model of a South Caucasus of the constitutional judiciary. The most important differences affect the nomination of judges, the scope of competencies, and the subjects eligible to submit the complaints. The study did not confirm the hypothesis that the model of the constitutional judiciary in Azerbaijan, as an authoritarian state, differs significantly from the more democratic models of Armenia and Georgia.
Glosa do wyroku Naczelnego Sądu Administracyjnego z 7 kwietnia 2022 r., sygn. akt III OSK 4374/21
Authors:   Uniwersytet Wrocławski, Jabłoński Mariusz
Published: April 2023

In the commented judgment, the Supreme Administrative Court (hereinafter: the Supreme Administrative Court) made a significant confirmation of the effectiveness of sending applications by electronic means (ordinary e-mail) to entities obliged under the provisions of the Act on Access to Public Information, even when such an application (e-mail) does not go directly to the mailbox address or to the e-mail address of a specific person indicated as competent to accept them on behalf of the obligated party, but to spam, or other various defined folders in the IT system used by the obligated party. The author emphasizes the legitimacy of not only the ruling of the Supreme Administrative Court, but also its substantive justification.
Glosa do wyroku Sądu Okręgowego w Kielcach z 25 sierpnia 2022 r., sygn. akt IX Ka 715/22
Authors:   Uniwersytet Łódzki, Kulesza Jan Witold
Published: April 2023

The gloss aims to indicate the limits of freedom of expression, set by provisions on hate speech and destruction of property. These limits are indicated by the analyzed case where the property was damaged as a result of publicly displaying political posters. However, the court misinterpreted the law, leading to a conviction for an offense rather than a crime. There was also no obligation to redress the damage. The author discusses how there were generally no grounds for conviction and the accused should be acquitted for a different reason.
O pensamento decolonial nos estudos da infância: epistemologias críticas e pós-críticas
Authors: Soares Ademilson de Sousa , Gebara Tania Aretuza Ambrizi , Martins Lucas Ramos
Published: April 2023

O artigo discute como o pensamento decolonial aparece na base de dados dos estudos da infância no campo da educação composta por dissertações, teses, trabalhos completos apresentados nos Grupos de Trabalho (GTs) em Reuniões Nacionais da ANPEd e artigos científicos publicados em revistas qualis A1. O estudo é caracterizado como metapesquisa, ou seja, uma pesquisa sobre as pesquisas de um campo e/ou área, no caso desse artigo os estudos da infância no campo da educação, e tem como objetivo indicar abordagens, enfoques, perspectivas e modelos analíticos. O debate sobre a descolonização das pesquisas é seguido pela apresentação de 11 (onze) autores (0,48% da produção) que tematizam o pensamento decolonial no total de 2246 (dois mil, duzentos e quarenta e seis) trabalhos catalogados. Como resultado, fica indicada a pouca presença do pensamento decolonial nos estudos da infância no campo da educação e emergem três campos temáticos para novas pesquisas na interface com as epistemologias críticas e pós-críticas: 1) pensamento decolonial crítico, infâncias e desigualdades; 2) pensamento decolonial, multiculturalismo, infâncias e diversidades; e 3) pensamento pós-colonial, paradigmas pós-críticos e infâncias contemporâneas.
COMPARISON OF THREE PROTOCOLS OF DNA EXTRACTION IN Myliobatis peruvianus
Authors: Lino Amaya Carlos Alfonso , Quijano Jara Carlos Helí , Cruz López Cinthya Santa
Published: April 2023

Myliobatis peruvianus“raya” is a regionally endangered (EP) species based on the drastic decrease in shipments of the species by 90%. There is also a lack of information on the species in different aspects such as the maximum depth it frequents; longevity, rate of population increase, also lacking genetic information through the use of DNA molecular markers. The objective of the present investigation was to compare three DNA extraction protocols for their subsequent use in genetic studies through the use of DNA molecular markers. Three extraction protocols were used, which were Phenol-Chloroform, Common Salt and Mezzomo, the concentration and quality of DNA were measured with NanoDrop One C, the data were subjected to an analysis of variance and a Tukey multiple comparison test, obtained good quality DNA in the common salt and phenol-chloroform protocols; while regarding the DNA concentration, the protocol that gave the best result was that of common salt.
Переосмысление города: соединение формы и потоков
Authors: Салат Серж , Новацки Каролин
Published: April 2023

Неудержимый рост экологических ограничений требует принципиально пересмотреть городской образ жизни и потребление природных ресурсов, особенно потребление энергии. Современные технические решения позволяют повысить энергоэффективность зданий и предотвратить или уменьшить их отрицательное воздействие на окружающую среду. Однако эти решения должны быть частью более глобального процесса планирования, который направлял бы городскую структуру и поведение жителей в сторону более эффективных моделей.
Роли локальной идентичности в сопротивлении реновации: кейс района Свиблово в Москве
Authors: Переяславцев Даниил
Published: April 2023

В работе представлено исследование роли образов места, составляющих локальную идентичность местных жителей, в городских протестах. В качестве примера использовался московский район Свиблово, с 2017 года активно протестующий против проведения программы реновации. Основная методология исследования — семантический анализ текстов из социальных сетей и протестных петиций с помощью алгоритмов обработки естественного языка; найденные закономерности подкреплялись материалами о протестных кампаниях из средств массовой информации. В результате исследования выявлена взаимосвязь между возникновением городских конфликтов и мобилизацией системы образов места, присутствующих как в повседневной риторике местных жителей, так и в их протестной риторике. Демонстрируется увеличение частотности использования образов места, связанных с естественными или запланированными параметрами среды, одновременно с использованием этой же группы образов в протестной агитации. Выявленная закономерность прослеживается и при ретроспективном анализе других градостроительных конфликтов в Свиблове, однако для подтверждения результатов требуется дополнительное исследование на расширенной выборке районов.
Step by Step from Environmental Samples to Preservation Vials v1
Authors: not provided phangguanjie
Published: April 2023

This protocol shows how to generate a MICROBES ISOLATION FROM ENVIRONMENTAL SAMPLES into LAB COLLECTION. Please follow the instructions and do not modify the protocols by yourself. If any changes are needed please inform the lab manager or admin.
Development of organic farming as a prospective way to environmental security of the Bulgarian village
Authors:   Bulgarian Academy of Sciences, Sofia, Bulgaria, Georgieva Maria
Published: April 2023

The importance of agriculture for the Bulgarian economy is reflected in historical and economic scientific research in the field of agrarian history, economics and law, influencing the growing interest of the scientific community in agrarian problems, including agrarian-ecological ones. In the conditions of the tense European agricultural market, despite numerous agreements, the state support of the Bulgarian agricultural producer in most developed countries is steadily increasing. Bulgaria, whose economy is organically and inextricably linked with agriculture, also found itself in the conditions of an urgent need to review, reassess the system of state support for ecological agriculture, in-depth analysis of the legal basis of its functioning, establishing ways of improvement and further development of ecologically oriented agricultural production. The problem of implementing ecological aspects of agricultural production in Bulgaria in the context of European integration is highlighted. The Bulgarian model of sustainable agricultural nature management is considered, and the main environmental problems that prevented its implementation are described. Attention is focused on the main aspects of state policy regarding the support of ecological agricultural production. Agricultural production, as one of the most common types of human activity, had a harmful effect on the surrounding natural environment, since industry and transport were considered the main violators of the natural balance at one time. Currently, agriculture is in the first place in terms of environmental pollution. The condition of the agricultural lands in Bulgaria is unsatisfactory. However, it was determined that serious problems for the environment arose due to the irregular use of mineral fertilizers and agrochemicals in agricultural production, which, together with rainwater and underground water, enter rivers and lakes, causing significant damage to large river basins, fish stocks and vegetation. As a result of the scientific research, it was established that the problem of forming the concept of biological agricultural production in Bulgaria has not been solved. The model of environmentally-oriented agricultural production required organizational and economic support for the management of sustainable agricultural nature management.
El casco histórico de León ante los nuevos tiempos / The historic core of León in the face of new times
Authors: Relea Fernandez Carlos Emilio
Published: April 2023

Toda ciudad está sometida, en mayor o menor grado, a un constante proceso de renovación que afecta a su tejido urbano y que responde a las particularidades de cada época, renovación generadora de cambios que dejan su impronta en la morfología urbana y que son especialmente sensibles en los barrios fundacionales de todo hecho urbano que personalizan los cascos históricos En muchos casos, como en el de la ciudad de León, estamos asistiendo desde finales del siglo pasado a una destrucción del concepto social y económico de barrio en aras de una artificiosidad, una musealización provocada por el importante proceso de turistificación al que se están viendo sometida en esta parte “sagrada de la ciudad” en la que descansa la esencia de la diferenciación de cada núcleo urbano. Pero las actuaciones en estos espacios tan significativos son una continua fuente de conflictos, ya sea desde el ámbito privado o desde el público. A la excesiva protección en la que se superponen diferentes figuras de planeamiento urbanístico y que retrae la iniciativa privada se le suman las controversias entre gobiernos locales y ciertos sectores de la población a la hora de actuar sobre el dominio público.