bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance of Optimized Security Overhead Using Clustering Technique Based on Fuzzy Logic for Mobile ad hoc Network
Authors: Yadav Amrendra Singh , Singh Avjeet , Vidyarthi Ankit , Barik Rabindra Kumar , Kushwaha Dharmender Singh 
Published: May 2023

AbstractMANET is an autonomous wireless network without any centralized authority, consisting of a dynamic topology with a multi-hop scenario. Clustering provides centralized authority within MANET and makes the network stable up to some extent. Security is one of the most challenging aspects, directly proportional to load and overhead over the network. The model being proposed uses a cluster-based technique and modified secure routing protocol, which minimizes the network’s load and overhead, improving the network’s security and performance. Two major factors are used as contribution level and stability factor for the choice of cluster head, which minimizes the method of re-selection for cluster head. The node addition using authentication and the Modified Secure Routing Protocol increases the security of the network. The Modified Secure Routing Protocol, based on limited and efficient use of the certificates with encryption and decryption of packets, minimizes the overhead and load over the network. Hence, it provides more efficiency and security.
Formulation of Mathematical Model for Stress-Strain Relationship of Normal and High Strength Concrete Under Compression
Authors: Sultan Wisam Hulail , Hamza Dina Mukheef 
Published: May 2023

Abstract
The research includes a new model proposed for the stress-strain relationship of unconfined concrete in compression valid for normal and high strength concrete. A wide range of experimental data with varied lab circumstances has been used for fitting and other data for verifying the model. It is noted that the current model has a good agreement with the experimental data for both its ascending and descending branches in normal and high strength concrete depending on the mean of average values of experimental to calculated stresses, coefficient of variation, and difference ratio. Where values of the average experimental to calculated stresses ranged from 0.723 to 1.354 for 38 samples with a mean of 0.994, while the coefficient of variation values ranged from 16.099 to 48.562 with a mean of 27.704 % for these specimens. Also, difference ratio values ranged from 0.86 % to 31.804 % with a mean of 9.009 % for these specimens. The model gives the best results in comparison with other models.
Stability of the Čachtice Underground Corridors
Authors: Bulko Roman , Mužík Juraj , Gwóźdź-Lasoń Monika , Juraszek Janusz , Segalini Andrea 
Published: May 2023

Abstract
At the beginning of the 16th century, the original inhabitants of Čachtice built a large complex of tunnels and cellars under the village, today called the Čachtice underground. The underground protected people from war conflicts, most recently during World War II, as anti-aircraft shelters. Over time, the underground lost its significance. The corridors were walled up, covered with rubble, and collapsed due to construction work. Later, a part of the underground was repaired, and historical events occurred in such a preserved part. Due to a lawsuit, the Čachtice underground was eventually closed to the public, and it was necessary to test the stability of the walls of the Čachtice underground. A 3D model of the underground was created, and three areas were identified in which numerical calculations were performed in Plaxis 2D software. The whole underground is located in loess soil. The Čachtice underground is stable if the conditions do not change diametrically. The calculated factors of safety support this assumption.
Effect of Steel Fibers on Compressive Strength of Recycled Aggregate Concrete
Authors: Shaikh Iram , Memon B. A , Memon M. A , Oad M. , Memon A. H 
Published: May 2023

AbstractIn this research article effect of steel fibers on workability and compressive strength of recycled aggregate concrete is presented. Recycled aggregates from demolished waste were used in equal proportion with conventional aggregates. Steel fibers of 1 mm diameter and 25 mm length were used. For preparation of concrete 1:2:4 mix with 0.55 water-cement ratio was used. Workability of each mix was checked by slump cone test. Total of 40 samples were prepared in standard way and cured for 28 days. All the specimens were tested for maximum load in universal testing machine under gradually increasing load at the rate of 0.5 kN/sec. Recorded load was converted into compressive strength. The obtained results showed that slump of the concrete decreased with increase in the dosage of the steel fibers than conventional concrete. Compressive strength was observed 15% and 34% higher than the compressive strength of conventional and recycled aggregate concrete at the steel fiber dosage of 3%. It is evident that although addition of recycled aggregates in concrete reduces the compressive strength but binary blending with steel fibers not only overcomes this loss but shows strength gain with increase in the dosage of the fibers.
Impact of duration of land abandonment on soil properties
Authors: Lichner Ľubomír , Šurda Peter , Toková Lucia , Hološ Slavomír , Kollár Jozef , Igaz Dušan 
Published: May 2023

Abstract
Abandonment of agricultural fields triggers the ecosystem recovery in the process referred to as secondary succession. The objective of this study was to find the impact of secondary succession during 12 years lasting abandonment of agricultural fields with loamy sand and sandy loam soils on soil properties, namely soil organic carbon content, pH, water and ethanol sorptivity, hydraulic conductivity, water drop penetration time (WDPT), and repellency index (RI). The method of space-for-time substitution was used so that the fields abandoned at different times were treated as a homogeneous chronosequence. The studied soils showed a permanent increase in WDPT and a monotonous decrease in pH and water sorptivity with the duration of field abandonment. The dependence of the other characteristics on the duration of field abandonment was not unambiguous. The ethanol sorptivity decreased between 0 and 8 years of field abandonment, and increased between 8 and 12 years, when it copied a similar course of sand content during abandonment. The hydraulic conductivity halved within the first eight years of field abandonment and then increased statistically insignificantly between 8 and 12 years of abandonment. The repellency index decreased statistically insignificantly between 0 and 8 years of abandonment and then increased between 8 and 12 years.
New methodological approach to characterize dryland´s ecohydrological functionality on the basis of Balance between Connectivity and potential Water Retention Capacity (BalanCR)
Authors: Rodríguez-Lozano Borja , Martínez-Sánchez Juan , Maza-Maza Jaime , Cantón Yolanda , Rodríguez-Caballero Emilio 
Published: May 2023

Abstract
Drylands are ecohydrologically-coupled ecosystems whose functioning depends on the interplay between hydrological connectivity between runoff source areas and the capacity of vegetation to retain water fluxes and associated resources. In this study we present a new easily applicable methodology for the ecohydrological characterization of dryland ecosystem functioning grounded in the balance between these two strongly interrelated processes using easily obtainable remote sensing data (e.g. UAV and SENTINEL-2 images), the BalanCR method (Balance between Connectivity and potential Water Retention Capacity). This methodology was first tested on synthetic hillslopes representing different configurations of the patchy and heterogenic distribution of vegetation in drylands. The analysis of these synthetic vegetation spatial patterns involving different vegetation patch densities, sizes, and fractional coverage values showed that BalanCR properly characterizes the expected ecohydrological interactions between potential conditions of runoff connectivity and water retention by plants operating in drylands. In a second step, we applied the BalanCR method on four semiarid hillslopes along an altitudinal aridity gradient covered by Mediterranean alpha steppes at very detailed spatial resolution (0.2 m) and at medium resolution (10 m). The obtained results were validated based on soil moisture data and vegetation greening and clearly recognized the four study sites as functional ecosystems, with very low water resource losses, and a pattern of increasing water redistribution processes as vegetation coverage declines. However, the sensitivity of methodology depends on the resolution of the input data (vegetation map and Digital Elevation Model; DEM), and the expected positive effect of small vegetation structures (vegetation patches smaller than the pixel size) on water redistribution is underestimated. Even in this case, the functionality and connectivity of the analyzed sites is correctly characterized as ecosystems showed similar values of both components for the methodology BalanC (hydrological connectivity component) and BalanR (potential water retention capacity component) than those obtained at very detailed scale, with a similar pattern of water allocation values in response to increased aridity. Thus, the proposed metric represents a promising tool for the proper evaluation of dryland conditions and to incorporate hillslope processes in climate change models, which is one of the main gaps to better understand the drylands response upon ongoing climate change.
Academic Identity, School Belongingness, Athletic Identity, and Athletic Expectations as Predictors of Academic and Athletic Time Use of College Athletes
Authors: Santos Jay C. , Sagas Michael 
Published: May 2023

AbstractTime demands are among the primary challenges for college student-athletes. They have to attend to classes and study halls as well as athletic-related activities such as training and competition. Both academic and athletic tasks require tremendous amount of time. Thus, it is argued that academics and athletics compete for the student-athletes’ attention. This research examined the impact of academic and athletic factors on student-athletes’ time use in academics and athletics using a subset of the 2015 United States National Collegiate Athletic Association (NCAA) GOALS data. The relationships of academic identity, school belongingness, athletic identity, and athletic expectations with academic time use and athletic time spent were tested. Differences on the variables of interest according to race, gender, and division level were also investigated. Our findings revealed that academic identity is a positive predictor of academic time use and a negative predictor of athletic time use, while athletic identity is a positive predictor of athletic time spent. We also determined a contrasting influence of athletic expectations in time commitments. Lastly, we likewise found significant effects of race, gender, and division level on the academic and athletic engagements of college athletes. Our findings have implications on the development of programs for athletic department to optimize the academic and athletic experiences of college student-athletes.
Exploring the Dynamic Landscape of Performance Management: A Bibliometric Analysis of Emerging Trends
Authors: Gorski Andra-Teodora , Dumitraşcu Dănuț Dumitru 
Published: May 2023

Abstract
Performance management, as a systematic and continuous process of planning, measuring and improving performance, is an important endeavor for any organization, regardless of being private or public. To understand the current state of research on performance management, a comprehensive bibliometric study was conducted. This paper aims to provide a co-occurrence analysis to identify and explore clusters, prevailing and emerging themes, and future research directions. For this purpose data was collected from the WoS database and processed with VOSviewer and Microsoft Excel. The paper contains visual representations of clusters, keywords and their relationships, as well as an analysis of the novelty of the concepts. Based on the average published year (APY), the hottest keywords identified are Covid-19 (APY: 2021), followed by Industry 4.0 (APY: 2020.17), together with other 4IR tools (big data analytics, big data, machine learning, artificial intelligence, cloud, Iot, etc.). Resulting from the analysis of concepts with APY after 2017, in terms of their representativeness (occurrence), links, and total link strengths (TLS) with other items from the map, three concepts significantly emerged: framework (Cluster 1); public sector (Cluster 3); sustainability (Cluster 4). Based on the overall findings, new research directions were proposed.
Determination of Pinoresinol 4-O-beta-D-glucopyranoside and Vladinol F as Markers in Pandanus tonkinensis Fruits by High Performance Liquid Chromatography
Authors: Thi Huyen Trang Dinh , Van Trung Bui , Quoc Anh Ngo , Hong Anh Duong , Hung Viet Pham 
Published: May 2023

According to the traditional know-how, the Northern wild pineapple (Pandanus tonkinensis) has been used efficiently as a major component of oriental remedies for liver protection. Based on the experimentally found chemical composition of Pandanus tonkinensis and their obtained biological activities in terms of the hepatoprotection purpose, two structure-elucidated compounds pinoresinol 4-O-beta-D-glucopyranoside and vladinol F were selected as potential markers for this medical plant. This paper is aiming to present the validation of proposed HPLC method for simultaneous quantification of the both pinoresinol 4-O-beta-D-glucopyranoside and vladinol F in the fruits of Pandanus tonkinensis with the following conditions: using RP-C18 (250 mm × 4.6 mm; 5 μm) column, detection wavelength measured at 228 nm, the mobile phases consisting of acetonitrile and 0.1% acetic acid in gradient mode with a flow rate of 1mL/min and injection volume was 10 mL. Method validation showed a high specificity, linear calibration ranging from 25.5 to 76.4 mg/ml (r= 0.9991) and from 26.0 to 77.9 mg/ml (r= 0.9987) for two markers, respectively. Besides, a good repeatability and intermediate precisions (RSD < 2%), a reliable accuracy (recovery efficiency between 99.4 and 101.5%, RSD < 1.73%) as well as the obtained limits of quantification in values of 2.55 m/g and 2.60 mg/g for the two mentioned markers were received. Using the above validated method, the content of two markers - pinoresinol 4-O-beta-D-glucopyranoside and vladinol F in Pandanus tonkinensis fruits collected from different locations (Thanh Hoa, Hoa Binh, Thai Nguyen) had been determined falling in the range of 0.0250 - 0.0435 mg/g and 0.0243 - 0.0371 mg/g, respectively.
Keywords: pinoresinol 4-O-beta-D-glucopyranoside, vladinol F, markers, Pandanus tonkinensis, HPLC
CHARACTERISTICS OF MIXED CROPS OF SORGHUM (SORGHUM BICOLOR L.) AND SOYBEAN (GLUCINE HISPIDA MAX.) GROWN FOR FORAGE PRODUCTION SPECIES
Authors: Гасымова А.Г. 
Published: May 2023

В статье приведены сведения о совместном размещении сои и сорго. Приведены сведения о продуктивности и питательности смешанных культур, оценен химический состав зеленой массы. Полученная информация может быть использована при разработке новых технологий кормообеспечения. Несмотря на свои ценные биологические свойства и потенциальное использование, сорго занимает в Азербайджане небольшие площади. Причиной этого является отсутствие технологии полива. Сорго (Sorhum) – ценная кормовая культура в кормопроизводстве, дает гарантированный и обильный урожай не только в чистом посеве, но и в смешанных посевах с соей за счет высокой засухоустойчивости, малотребовательности к земле, высоких кормовых качеств. Зеленую массу используют не только для приготовления силоса, но и для заготовки сена. Питательные преимущества на его основе приводят к увеличению удоев сельскохозяйственных животных.
The article provides information on the joint placement of soybeans and sorghum. Information on the productivity and nutritional value of mixed crops is given, and the chemical composition of the green mass was evaluated. The information obtained can be used in the development of new technologies for feed supply. Despite its valuable biological properties and potential uses, sorghum occupies small areas in Azerbaijan. The reason for this is the lack of irrigation technology. Sorghum (Sorhum) is a valuable fodder crop in fodder production, it gives a guaranteed and plentiful harvest not only in pure crops, but also in mixed crops with soybeans due to its high resistance to drought, low demand for land, and high fodder qualities. Green mass is used not only for making silage, but also for making hay. Nutritional advantages based on it lead to increased milk yield in agricultural animals.
ANALYSIS OF THE EFFICIENCY OF A TRANSFORMER WITH HIGH-TEMPERATURE SUPERCONDUCTING WINDINGS
Authors: Манусов В.З. , Галеев Р.Г. , Реутов С.Н. 
Published: May 2023

Потери энергии в трансформаторном электрооборудовании связаны с использованием активных материалов имеющих омическое сопротивление. Это сказывается на коэффициенте полезного действия и энергоэффективности системы электроснабжения. В статье предложено решения данной проблемы путем внедрения высокотемпературных сверхпроводников.
Energy losses in transformer electrical equipment are associated with the use of active materials having ohmic resistance. This affects the efficiency and energy efficiency of the power supply system. The article proposes solutions to this problem by introducing high-temperature superconductors.
THE PHENOMENON OF THE SKIN EFFECT WHEN THE TRANSFORMER IS OPERATING AT AN INCREASED FREQUENCY
Authors: Манусов В.З. , Галеев Р.Г. , Реутов С.Н. , Переладов М.Е. 
Published: May 2023

С целью уменьшения масса габаритных характеристик электрических машин и трансформаторного электрооборудования в частности, в некоторых видах мобильных систем электроснабжения применяется частота электрической сети 200-400 Гц, но с повышением частоты питающей сети усиливается явление «скин-эффект»
In order to reduce the mass of the overall characteristics of electric machines and transformer electrical equipment, in particular, in some types of mobile power supply systems, the frequency of the electric network 200-400 Hz is used, but with an increase in the frequency of the supply network, the phenomenon of «skin effect» increases
FEATURES OF THE DESIGN TECHNIQUE AND TEST PROGRAMS OF COMPRESSED COMPOSITE PANELS UNDER STABILITY LIMITATIONS CONSIDERING THE EFFECT OF THROUGH DEFECTS
Authors: Митрофанов О.В. , Торопылина Е.Ю. 
Published: May 2023

Московский авиационный институт (Национальный исследовательский университет) Предложена аналитическая уточненная методика проектирования сжатых подкрепленных композитных панелей, основанная на условии равноустойчивости. Модификация исходной методики проведена за счет учета ударных повреждений обшивки. На основе результатов параметрического анализа сделан вывод об ограничении энергии ударного воздействия для программ испытаний панелей крыла легкого самолета.
An analytical refined technique for designing compressed stiffened composite panels based on the condition of equal to stability. Modification of the original technique was carried out by taking into account regulated damage to the skin. Based on the results of parametric analysis, it is concluded that the impact energy is limited for testing programs of light aircraft wing panels.
A EXPLORAÇÃO DE PETRÓLEO E GÁS NATURAL E A RESPECTIVA COMPENSAÇÃO FINANCEIRA DOS ENTES SUBNACIONAIS: OMISSÕES NA AÇÃO CÍVEL ORIGINÁRIA Nº 747 E OPORTUNIDADE DE REEXAME NA AÇÃO DIRETA DE INCONSTITUCIONALIDADE Nº 5936 PELO SUPREMO TRIBUNAL FEDERAL
Authors: Garbaccio Grace Ladeira , Holanda Edson Victor Eugênio de 
Published: May 2023

A exploração do petróleo e gás natural no Brasil sofreu alterações a partir da descoberta do pré-sal. Como consequência, as receitas geradas por sua exploração têm sido objeto de disputas entre os entes federados, notadamente a compensação financeira prevista no art. 20, § 1º, da Constituição Federal de1988. Os embates surgem do conflito entre concentrar na União ou descentralizar as receitas para Estados-membros e Municípios. Nesse contexto, surge o questionamento se é possível a União ser a destinatária exclusiva da participação governamental denominada bônus de assinatura, objeto da Ação Cível Originária n. 747, do Supremo Tribunal Federal (STF), julgada improcedente em 29 de maio de 2020. Entretanto, os fundamentos apresentados pela Corte não observaram a densidade que o tema exige, passando ao largo do conceito de federalismo adotado pela CF/1988, que promove a autonomia financeira dos entes subnacionais como pilar central. Na mesma toada, não se debruça sobre a natureza jurídica dos contratos de exploração de petróleo e gás natural, bem como das compensações financeiras como contraprestação à alienação do patrimônio púbico. Não obstante aspectos essenciais não observados na ACO n. 747, abre-se nova oportunidade para que o STF examine, com devida profundidade, o tema nos autos da Ação Direta de Inconstitucionalidade nº 5936, para que, mesmo mantendo-se contrário ao compartilhamento do bônus de assinatura com os entes subnacionais, enfrente as particularidades técnicas requerida. A metodologia utilizada foi a análise dialética crítica dos discursos e conteúdos relativos às decisões proferidas e estudo das leis e bibliografias previstas sobre o assunto.
VIDA BOA E BEM COMUM UMA RESENHA A MICHAEL SANDEL
Authors: Barzotto Luis Fernando 
Published: May 2023

O presente texto é uma resenha de quatro obras de Michael Sandel: Contra a perfeição, O que o dinheiro não compra, Justiça e A tirania do mérito. Cada uma das obras será apresentada e avaliada a partir da tematização do pensamento de Sandel como uma recuperação da visão aristotélica de vida boa (ética) e bem comum (política). As questões enfrentadas pelo autor serão contrastadas com os argumentos de seus opositores, liberais, libertários e utilitaristas, de modo a realçar o vigor e a originalidade do seu esforço teórico de pensar os dilemas ético-políticos contemporâneos.
SOBERANIA E DIREITO INTERNACIONAL COMO DISCURSO: A ORGANIZAÇÃO MUNDIAL DA SAÚDE, O COMPORTAMENTO DOS ESTADOS E A PANDEMIA DE SARS-COV-2 DE 2020
Authors: Vasconcelos Raphael Carvalho de , Ferreira Marina Rodrigues Souto Barra 
Published: May 2023

A pesquisa consolidada neste artigo teve como ponto de partida a relação entre a soberania e o direito internacional. O problema proposto teve como premissa o fortalecimento, nos últimos anos, do poder soberano dos Estados nas suas relações entre pares e com a institucionalidade internacional buscando compreender em que medida haveria contradição entre o comportamento e o discurso desses sujeitos de direito internacional. A pandemia do vírus Sars-CoV-2 em 2020 e a relação dos Estados com a Organização Mundial de Saúde – OMS - foram escolhidas como variáveis especiais para a análise proposta. Foram consultadas fontes oficiais das organizações internacionais, doutrina e notícias de jornais e sites para a verificação desse movimento em 2020, especificamente, no que se refere ao comportamento dos Estados e as declarações, recomendações e ações da OMS. Conclui-se, finalmente, que pelo fato de o direito internacional proporcionar legitimidade, os Estados, exercendo soberania muitas vezes em aparente confronto com a ordem global instituída, recorrem à institucionalidade internacional – suas regras e princípios jurídicos - para justificar ações e comportamentos.