bluuebunny/crossref_metadata_2025 huggingface dataset:
Extraction and Characterization of Bromelain from Pineapple Core: A Strategy for Pineapple Waste Valorization
Authors: Fissore Alex , Marengo Mauro , Santoro Valentina , Grillo Giorgio , Oliaro-Bosso Simonetta , Cravotto Giancarlo , Dal Piaz Fabrizio , Adinolfi Salvatore
Published: July 2023

Bromelain is a mixture of cysteine endopeptidase usually extracted from pineapple juice and is used for the treatment of various human diseases and in industrial applications. Bromelain demand is quickly increasing, and its recovery from pineapple residues appears to be a sustainable waste management strategy. Pineapple core is among the most significant waste materials in the production of canned pineapple and is richer in bromelain than other pineapple residues. In this project, we compared the enzymatic properties and composition of bromelain extracts from either pineapple core or pulp to address the recovery of bioactive bromelain from pineapple core, thus contributing to the valorization of this waste material. Although significant differences were detected in the protein content of the two preparations, no differences could be detected for their proteolytic activity and for the effect of pH on their enzymatic activity. Mass spectrometry (MS) approaches identified the same peptidases in the fruit and in the core. This confirmed the possibility of using pineapple core to obtain relevant amounts of bioactive bromelain by applying a relatively simple procedure, thus paving the way to implementing a circular economy in this specific industrial sector.
Comparative Study of the Yield and Chemical Profile of Rose Oils and Hydrosols Obtained by Industrial Plantations of Oil-Bearing Roses in Bulgaria
Authors: Dobreva Ana , Nedeva Deyana , Mileva Milka
Published: July 2023

Bulgaria is famous for its oil-bearing rose. R. damascena Mill. and R. alba L. are mainly cultivated in the country, but a recent survey of industrial plantations in 2020 revealed that R. centifolia L. and hybrids of R. damascena Mill. X R. gallica L. are also common in the rose valley. Although their essential oil cannot be compared in quality with the classic, these species are preferred by farmers with high yields of flowers and resistance to diseases and pests. All these roses are also used to produce rose water and extracts. The aim of this investigation was to compare the yield and chromatographic fingerprints of seven rose oils and hydrosols produced in Bulgaria. The quantitative composition of the main components of the oils was compared with the norms of the world standards. Our study showed that the yield of essential oil from these roses was in the range of 0.015–0.048%. The main group in the chemical composition is terpene alcohols, which vary in range: geraniol (15.85–34.02%), citronellol (6.70–28.72%), and nerol (5.80–11.90%) but with a different ratio. Hydrocarbons are represented by saturated aliphatic homologs with an odd number of carbon atoms, the main ones being nonadecane (8.10–22.67%), heneicosane (4.37–10.21%), heptadecane (1.07–2.98%), and triclosan (0.81–5.90%). In contrast, the chemical profile of the hydrosols was performed using phenylethyl alcohol (27.45–69.88%), geraniol (13.72–28.67%), and citronelol+nerol (4.56–17.37%). The results show that the presence of plantations with a genotype different from that of R. damascena implies differences in the quality of rose oils and hydrosols. This determines their properties of use.
Hadamard Transform Ion Mobility Spectrometry Based on Matrix Encoding Modulation
Authors: Chen Ke , Li Lingfeng , Li Peng
Published: July 2023

Ion mobility spectrometry (IMS) has been widely used for the on-site detection of trace chemicals, but continue to suffer from a low duty cycle of ion injection. The Hadamard transform ion mobility spectrometry (HT-IMS) technique was employed to address the problem with increased signal-to-noise ratio (SNR). However, in this work, through simulation, a certain deviation between the mathematical principle of Hadamard transform and actual data collection process was found, which resulted in a distortion of the baseline in the spectrum. The reason behind this problem was analyzed and a novel IMS based on Sylvester-type Hadamard matrix encoding modulation (Sylvester-HT-IMS), together with a set of date collection and processing technique, was proposed. Sylvester-HT-IMS offered much improved quality of deconvoluted spectrum and overall performance in the simulation. In experimental verification, with reactant ions and product ions characterized, Sylvester-HT-IMS showed improved SNR and ion discrimination over both conventional signal-averaged IMS (SA-IMS) and HT-IMS, providing an alternative method for multiplexed IMS.
Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids
Authors: Zhang Zhi , Gao Sheng , Zhong Caomao , Zhang Zhaoyun
Published: July 2023

When multiple paralleled distributed generation (DG) units operate in an islanded microgrid, accurate power sharing of each DG unit cannot be achieved with a conventional droop control strategy due to mismatched feeder impedance. In this paper, a small AC signal (SACS)-injection-based modified droop control method is presented for accurate active and reactive power sharing among DG units. The proposed control method adjusts the voltage amplitude of each DG unit by injecting small AC signals to form a reactive power control loop. This strategy does not need communication links or to specifically obtain the physical parameter of the feeder impedance and only requires the local information. Moreover, the parameter design procedure and stability analysis are given full consideration. Finally, simulation and experimental results verify the effectiveness of the proposed control scheme, and accurate active and reactive power sharing can be achieved.
Contribution of Ribbon-Structured SiO2 Films to AlN-Based and AlN/Diamond-Based Lamb Wave Resonators
Authors: Moutaouekkil Mohammed , Streque Jérémy , Marbouh Othmane , El Boudouti El Houssaine , Elmazria Omar , Pernod Philippe , Bou Matar Olivier , Talbi Abdelkrim
Published: July 2023

New designs based on S0 Lamb modes in AlN thin layer resonating structures coupled with the implementation of structural elements in SiO2, are theoretically analyzed by the Finite Element Method (FEM). This study compares the typical characteristics of different interdigital transducer (IDTs) configurations, involving either a continuous SiO2 cap layer, or structured SiO2 elements, showing their performance in the usual terms of electromechanical coupling coefficient (K2), phase velocity, and temperature coefficient of frequency (TCF), by varying structural parameters and boundary conditions. This paper shows how to reach temperature-compensated, high-performance resonator structures based on ribbon-structured SiO2 capping. The addition of a thin diamond layer can also improve the velocity and electromechanical coupling coefficient, while keeping zero TCF and increasing the solidity of the membranes. Beyond the increase in performance allowed by such resonator configurations, their inherent structure shows additional benefits in terms of passivation, which makes them particularly relevant for sensing applications in stern environments.
Mobility-Aware Federated Learning Considering Multiple Networks
Authors: Macedo Daniel , Santos Danilo , Perkusich Angelo , Valadares Dalton C. G.
Published: July 2023

Federated learning (FL) is a distributed training method for machine learning models (ML) that maintain data ownership on users. However, this distributed training approach can lead to variations in efficiency due to user behaviors or characteristics. For instance, mobility can hinder training by causing a client dropout when a device loses connection with other devices on the network. To address this issue, we propose a FL coordination algorithm, MoFeL, to ensure efficient training even in scenarios with mobility. Furthermore, MoFeL evaluates multiple networks with different central servers. To evaluate its effectiveness, we conducted simulation experiments using an image classification application that utilizes machine models trained by a convolutional neural network. The simulation results demonstrate that MoFeL outperforms traditional training coordination algorithms in FL, with 156.5% more training cycles, in scenarios with high mobility compared to an algorithm that does not consider mobility aspects.
Electroacoustic Biosensor Systems for Evaluating Antibiotic Action on Microbial Cells
Authors: Guliy Olga I. , Zaitsev Boris D. , Borodina Irina A.
Published: July 2023

Antibiotics are widely used to treat infectious diseases. This leads to the presence of antibiotics and their metabolic products in the ecosystem, especially in aquatic environments. In many countries, the growth of pathogen resistance to antibiotics is considered a threat to national security. Therefore, methods for determining the sensitivity/resistance of bacteria to antimicrobial drugs are important. This review discusses the mechanisms of the formation of antibacterial resistance and the various methods and sensor systems available for analyzing antibiotic effects on bacteria. Particular attention is paid to acoustic biosensors with active immobilized layers and to sensors that analyze antibiotics directly in liquids. It is shown that sensors of the second type allow analysis to be done within a short period, which is important for timely treatment.
Fast Procedure for Removing Silver Species in Waters Using a Simple Magnetic Nanomaterial
Authors: Vicente-Martínez Yésica , Ruiz-Mendieta Moisés , Caravaca-Garratón Manuel , Hernández-Córdoba Manuel , López-García Ignacio
Published: July 2023

The increase in the production and use of disinfectants containing silver atoms (in both its ionic and nanomeric forms) in their formulation, due to the global pandemic situation caused by COVID-19, has increased the presence of silver species in wastewater. Moreover, silver atoms are now considered as emerging pollutants in water. In this work, we propose a novel method for the instantaneous and simultaneous removal of ionic and nanomeric silver in water samples, using a previously unpublished methodology consisting of the in situ formation of magnetic nanoparticles in the aqueous samples to be treated. While the nanoparticle precursors react to form them, the silver atoms present in the sample are adsorbed onto them due to a strong electrostatic interaction. As the final nanoparticles are magnetic, they can be easily removed from the aqueous medium using a magnet, leaving the samples free of silver species. The innovative feature of the method is that the adsorbent is synthesized in situ, within the sample to be treated, making the approach a low-cost, easy-to-perform solution. Temperature, contact time, dose of Fe3O4, and concentration of nanomeric and ionic silver were investigated. The results showed that at 50 °C, 100% of both silver species were removed from the water samples simultaneously. The surface of Fe3O4 was characterized before and after the application of the removal process using energy-dispersive X-ray spectroscopy and Field Emission scanning electron microscopy. Adsorption kinetics and equilibrium isotherms studied reveal a Langmuir-type physicochemical process. The procedure has been applied to different water samples (river and drinking water) with excellent results, making the method a new standard for the removal of ionic and nanomeric silver. In addition, the nanoparticles formed could be recycled and reused for other analytical and decontamination purposes.
Stifled Screams: Experiences of Survivors of Sexual Harassment in First-Generation Universities in Southwestern Nigeria
Authors: Mapayi Boladale M. , Oloniniyi Ibidunni O. , Oginni Olakunle A. , Opara Onyedikachi J. , Olukokun Kehinde J. , Harrison Abigail , Folayan Morenike O.
Published: July 2023

The aim of this study was to explore the lived experience of survivors of sexual harassment, as well as reportage factors and outcomes, psychosocial sequelae, and how survivors coped in first-generation higher-education institutions in Southwestern Nigeria. A qualitative exploration of the experience of 12 (11 females and 1 male) participants using in-depth interviews was conducted. The findings were grouped into four broad themes, namely: (i) experience of sexual harassment, (ii) reporting patterns, (iii) coping strategies, and (iv) the physical and emotional impact of sexual harassment. Most survivors had experienced sexual harassment multiple times and same-sex harassment occurs in higher-education institutions. Survivors did not report to university authorities because of the perception that the support from the environment was poor. Many shared information with their support networks or visited a psychologist for mental health care. Others used maladaptive coping mechanisms such as increased alcohol consumption. Mental health symptoms ranged from mild to severe. Institutes of higher education need to take decisive actions to improve the environment and to promote the prompt reporting of sexual harassment by survivors; they must also provide access to support to prevent the development of mental health problems, which are a common post-event occurrence, as identified in the present study.
Social Media Platforms and Political Participation: A Study of Jordanian Youth Engagement
Authors: Alodat Abdelsalam M. , Al-Qora’n Lamis F. , Abu Hamoud Muwafaq
Published: July 2023

The wide adoption of social media platforms has altered how people communicate, obtain information, and participate in society. Regarding political participation, social media has emerged as a novel venue for people to voice their opinions, connect with others who share their viewpoints, and engage in activism. As a result, knowing the effect of social media on political participation is critical, particularly in developing nations like Jordan. This research investigates the moderating effect of certain factors on the impact of social media on political involvement among Jordanian youth. The Partial Least Squares Structural Equation Modelling (PLS-SEM) approach is used to analyze data from a survey of 334 young people. The findings show that social media has a favorable and considerable impact on political participation. Gender was also discovered to have a strong moderating effect on the relationship between social media use and political participation. According to the analysis, gender positively moderates the effect of the frequency of social media use on political participation, while gender negatively moderates the effect of the purpose of social media usage on political participation. The study sheds light on the significance of social media in young people’s political participation in Jordan, emphasizing the need of taking differences in gender into account when developing effective tactics to engage young people in the political processes.
Azulene, Reactivity, and Scientific Interest Inversely Proportional to Ring Size; Part 2: The Seven-Membered Ring
Authors: Razus Alexandru C.
Published: July 2023

The second part of the article Azulene, Reactivity, and Scientific Interest Inversely Proportional to Ring Size deals with the chemical behavior of the seven-atom azulenic ring. As the title states, the ability of this system to react is lesser compared to that of the five-atom ring; despite this, a large number of syntheses contain it as a participant in the molecules of starting compounds. This review is focused on certain more frequent syntheses such as nucleophilic substitution of the seven-atom ring or its substituents, vicarious nucleophilic substitutions, substitutions of azulene metallic compounds, or reactions catalyzed by complexes of certain transition metals. The syntheses of tricyclic compounds, porphyrinogenic systems, or azulenocyanines containing an azulenyl moiety are also presented. The adopted presentation is mainly based on reaction schemes that include the reaction conditions, as well as the yields of the products formed.
Balancing Tradeoffs in Network Queue Management Problem via Forward–Backward Sweeping with Finite Checkpoints
Authors: Radwan Amr , Alenezi Taghreed Ali , Alrashdan Wejdan , Hwang Won-Joo
Published: July 2023

Network queue management can be modelled as an optimal control problem and is aimed at controlling the dropping rate, in which the state and control variables are the instantaneous queue length and the dropping rate, respectively. One way to solve it is by using an indirect method, namely forward–backward sweeping based on the Pontryagin minimum principle to derive control the trajectory of the dropping rate. However, there exists some performance balance issues in the network queue, such as memory usage versus runtime of the algorithm, or dropping rate versus network queue length. Many researchers have exploited symmetry for constrained systems, controllers, and model predictive control problems to achieve an exponential memory reduction and simple, intuitive optimal controllers. In this article, we introduce the integration of the checkpointing method into forward–backward sweeping to address such balancing issues. Specifically, we exploit the revolve algorithm in checkpointing and choose a finite number of checkpoints to reduce the complexity. Both numerical and simulation results in a popular network simulator (ns-2) are provided through two experiments: varying bandwidth and offered load, which solidify our proposal in comparison to other deployed queue management algorithms.
Implementation of Deep Learning Models on an SoC-FPGA Device for Real-Time Music Genre Classification
Authors: Faizan Muhammad , Intzes Ioannis , Cretu Ioana , Meng Hongying
Published: July 2023

Deep neutral networks (DNNs) are complex machine learning models designed for decision-making tasks with high accuracy. However, DNNs require high computational power and memory, which limits such models to fitting on edge devices, resulting in unnecessary processing delays and high energy consumption. Graphical processing units (GPUs) offer reliable hardware acceleration, but their bulky sizes prevent their utilization in portable equipment. System-on-chip field programmable gated arrays (SoC-FPGAs) provide considerable computational power with low energy consumption, making them ideal for edge computing applications, owing to their innovative, flexible, and small design. In this paper, we implement a deep-learning-based music genre classification system on a SoC-FPGA board, evaluate the model’s performance, and provide a comparative analysis across different platforms. Specifically, we compare the performance of long short-term memory (LSTM), convolutional neural networks (CNNs), and a hybrid model (CNN-LSTM) on an Intel Core i7-8550U by Intel Cooperation. The models are fed an acoustic feature called the Mel-frequency cepstral coefficient (MFCC) for training and testing (inference). Then, by using the advanced Vitis AI tool, a deployable version of the model is generated. The experimental results show that the execution speed is increased by 80%, and the throughput rises four times when the CNN-based music genre classification system is implemented on SoC-FPGA.
Seropositivity of Anti-Toxoplasma gondii and Anti-Neospora caninum Antibodies in Cattle Intended for Human Consumption in an Amazonian Area of North Brazil
Authors: Sousa Formiga Victor Hugo Alves , Alvares Felipe Boniedj Ventura , Anjos Mariana Moreira , Freitas Jefferson Vieira , Silva Daiane Peixer , Parentoni Roberta Nunes , Lima Brasil Arthur Willian , Medeiros Gláucia Diojânia Azevêdo , Feitosa Thais Ferreira , Vilela Vinícius Longo Ribeiro
Published: July 2023

Toxoplasma gondii and Neospora caninum are obligate intracellular intestinal coccidia distributed worldwide, and are causative agents of toxoplasmosis and neosporosis, respectively. The aim of this study was to evaluate the prevalence of anti-T. gondii and anti-N. caninum antibodies and the factors associated with infections in beef cattle intended for human consumption in an Amazonian area of North Brazil. We collected blood samples of 387 cattle from 50 herds located in different municipalities of the State of Rondônia. An epidemiological questionnaire was distributed to farmers, with regard to nutritional, sanitary and reproductive herd management. The samples were identified, refrigerated and sent for serological analyses via IFAT (Immunofluorescent Antibody Test). Among the 387 analyzed animals, 91 (23.5%; CI 95%: 18.8–27.2) were positive for anti-T. gondii antibodies, with titers varying from 1:64 (75.8%) to 1:512 (2.2%). For anti-N. caninum antibodies, only four animals (1%; CI 95%: 0–2.7) were positive, with titers ranging from 1:400 (50%) to 1:1600 (25%). We observed a significant rate of anti-T. gondii antibodies in the variables “pure breed” and “contact with free-range chickens” (p < 0.2). There were no risk factors associated with the presence of anti-T. gondii or anti-N. caninum antibodies. In conclusion, there was a high prevalence of anti-T. gondii antibodies in beef cattle intended for human consumption in the State of Rondônia, Brazil, and a low prevalence of anti-N. caninum antibodies. Longitudinal studies can better elucidate the cause of these prevalence levels and how they could be better prevented and controlled.
A Simple, Exact Formulation of Number Counts in the Geodesic-Light-Cone Gauge
Authors: Fanizza Giuseppe , Gasperini Maurizio , Marozzi Giovanni
Published: July 2023

In this article, we compare different formulations of the number count prescription using the convenient formalism of the Geodesic-Light-Cone gauge. We then find a simple, exact, and very general expression of such a prescription which is suitable for generalised applications.
Foot-and-Mouth Disease Virus Serotype O Exhibits Phenomenal Genetic Lineage Diversity in India during 2018–2022
Authors: Dahiya Shyam Singh , Subramaniam Saravanan , Mohapatra Jajati Keshari , Rout Manoranjan , Biswal Jitendra Kumar , Giri Priyabrata , Nayak Vinayak , Singh Rabindra Prasad
Published: July 2023

In India, widespread foot-and-mouth disease (FMD) outbreaks occurred in 2021. The objective of this study was to identify genetic lineages and evaluate the antigenic relationships of FMD virus (FMDV) isolates gathered from outbreaks reported between 2019 and 2022. Our study shows that the lineages O/ME–SA/Ind2001e and the O/ME–SA/Cluster-2018 were both responsible for the FMD outbreaks on an epidemic scale during 2021. This observation is in contrast to earlier findings that suggested epidemic-scale FMD outbreaks in India are often connected to a single genetic lineage. Additionally, we report here the identification of the O/ME–SA/PanAsia-2/ANT10 sub-lineage in India for the first time, which was connected to two intermittent outbreaks in Jammu and Kashmir. The current study demonstrates that the O/ME–SA/ind2001e lineage has a strong presence outside of the Indian subcontinent. Furthermore, the O/ME–SA/Cluster-2018 was observed to have a wider geographic distribution than previously, and like the O/ME–SA/Ind2001d and O/ME–SA/Ind2001e lineages in the past, it may eventually spread outside of its geographic niche. For O/ME–SA/Ind2001e and O/ME–SA/Cluster-2018, the predicted substitution rate for the VP1 region was 6.737 × 10−3 and 8.257 × 10−3 nt substitutions per site per year, respectively. The time of the most recent common ancestor of the O/ME–SA/Ind2001e and O/ME–SA/Cluster-2018 strains suggests that the viruses possibly emerged during 2003–2011 and 2009–2017, respectively. Recent sightings of the O/ME–SA/PanAsia2/ANT10 virus in India and the O/ME–SA/Ind2001e virus in Pakistan point to possible cross-border transit of the viruses. The results of a two-dimensional viral neutralization test revealed that all of the field isolates were antigenically matched to the currently used Indian vaccine strain O INDR2/1975. These results suggest that the serotype O vaccine strain can protect against outbreaks brought on by all three circulating lineages.
The Occurrence of Acute Disseminated Encephalomyelitis in SARS-CoV-2 Infection/Vaccination: Our Experience and a Systematic Review of the Literature
Authors: Stoian Adina , Bajko Zoltan , Stoian Mircea , Cioflinc Roxana Adriana , Niculescu Raluca , Arbănași Emil Marian , Russu Eliza , Botoncea Marian , Bălașa Rodica
Published: July 2023

Background: The neurological complications of coronavirus disease 2019 (COVID-19) infection and the side effects of vaccination include immune-mediated diseases of the central nervous system (CNS) such as acute disseminated encephalomyelitis (ADEM). It is an acute-onset demyelinating disease that involves a rapid evolution and multifocal neurological deficits that develops following a viral or bacterial infection or, less frequently, following vaccination. Acute hemorrhagic leukoencephalitis (AHLE) is the hemorrhagic variant of ADEM that presents a more severe evolution which can be followed by coma and death. The objectives of this study consist in evaluating the diagnosis, clinical characteristics, imaging and laboratory features, evolution, and treatment of ADEM and AHLE following COVID-19 infection or vaccination. Methods: We performed a systematic review of the medical literature according to PRISMA guidelines that included ADEM cases published between 1 January 2020 and 30 November 2022 following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and vaccination and also included our own clinical experience regarding this pathology. Results: A total number of 74 patients were diagnosed with ADEM, 45 following COVID-19 infection and 29 after a SARS-CoV-2 vaccine. A total of 13 patients (17.33%) presented AHLE. The moderate form of COVID-19 presented a positive correlation with AHLE (r = 0.691, p < 0.001). The existence of coma and AHLE was correlated with poor outcomes. The following more aggressive immunomodulatory therapies applied in severe cases were correlated with poor outcomes (major sequelae and death): therapeutic plasma exchange (TPE) treatment (r = 382, p = 0.01) and combined therapy with corticosteroids and TPE (r = 0.337, p = 0.03). Conclusions: Vaccinations are essential to reduce the spread of the COVID-19 pandemic, and the monitoring of adverse events is an important part of the strategic fight against SARS-CoV-2. The general benefits and the overall good evolution outweigh the risks, and prompt diagnosis is associated with a better prognosis in these patients.
A Basic Study for Active Steering Wheel System for Steering Burden Evaluation by Driving Position Focus on Driver’s Arm Size
Authors: Uchino Daigo , Kobayashi Ikkei , Kuroda Jumpei , Ogawa Kazuki , Ikeda Keigo , Kato Taro , Endo Ayato , Kato Hideaki , Narita Takayoshi
Published: July 2023

As automated driving has not yet been established, on narrow roads where there is no separation between pedestrians and vehicles, it is essential to switch to manual driving. However, when the driver turns the steering wheel from one hand to another on narrow roads, it causes steering burdens and operational errors if the steering feel or burden is not proper. Thus, this study aims to construct an active steering wheel system that provides an appropriate steering feel or burden by controlling the steering reaction torque, driving position and steering gear ratio for each driver. In this paper, we focused on and examined the driving position among these. A two-dimensional steering model that considers the size of the arms for each driver was established to evaluate steering burden. In addition, a basic study was conducted on the appropriate driving position. Then, based on the joint movements and angles calculation, the appropriate driving position that considers the size of the arms was studied by evaluating the joint power. As a result, it was found that if the steering wheel position is too close to the driver, the amount of joint movement increases, and if it is too far away, the joint movement decreases. Therefore, it was found that the appropriate steering wheel position for each driver’s arm length can be considered by using the joint power.
Promising varieties of oilseed flax in the phytosanitary technology of the Southern Trans-Urals
Authors:   Kurgan Maltsev State Agricultural Academy – a branch of the Federal State Budgetary Educational Institution of Higher Education “Kurgan State University”, Russia, Kurgan region, Lesnikovo, Porsev I. N. , Dunicheva S. G. ,   Kurgan Maltsev State Agricultural Academy – a branch of the Federal State Budgetary Educational Institution of Higher Education “Kurgan State University”, Russia, Kurgan region, Lesnikovo, Slovtsova M. V. ,   Kurgan Maltsev State Agricultural Academy – a branch of the Federal State Budgetary Educational Institution of Higher Education “Kurgan State University”, Russia, Kurgan region, Lesnikovo, Slovtsova M. V. ,   Kurgan Maltsev State Agricultural Academy – a branch of the Federal State Budgetary Educational Institution of Higher Education “Kurgan State University”, Russia, Kurgan region, Lesnikovo
Published: July 2023

Oilseed fl ax is a multi-use crop (oil, fi ber, feed presscakes and meals), which has been used by humans since ancient times. Flax presscake has a high energy value. For example, 1 kg of cake contains 1,27 feed units, 13,73 MJ and 287 g of digestible protein, as well as a rich composition of trace elements and vitamins. Protein of fl axseed presscake is highly digestible and has a good amino acid composition. The fats remaining in the linseed presscake after distilling the oil have all the usefuproperties as linseed oil. The purpose of the research was to characterize promising varieties of oilseed fl ax in the phytosanitary technology of the Southern Trans–Urals. In the experiment, the maximum yield was obtained for the Ural variety – 2,35 t/ha, which signifi cantly exceeded the standard Northern variety. A good level of yield was shown by varieties Itil – 2,23 t/ha, VNIIMK 620 – 2,17 t/ha. The yield of the foreign variety Lirina was lower – 2,15 t/ ha. The yield of straw varied by varieties it reflecting their reaction to the arid conditions of vegetation. The lowest straw yield was shown by Raciol variety – 1,50 t/ha, the highest straw yield was formed by the varieties Lirina – 2,27 t/ha, Itil – 2,29 t/ha, Northern – 2,32 t/ha and Ural – 2,50 t/ha. Unfavorable weather conditions during the years of research contributed to the increase in the incidence of fl ax varieties with Fusarium. Statistical analysis showed a reliable correlation of plant density with the development of Fusarium r = –0,7512 and straw yield r = –0,7795. A signifi cant infl uence of meteorological conditions and Fusarium disease on the formation of the main economically valuable traits of promising varieties of oilseed fl ax under the conditions of the Southern Trans-Urals has been established.
Efectos de la gamificación en la motivación y el aprendizaje
Authors: Huamaní Quispe María del Carmen , Vega Vilca Carlos Sixto
Published: July 2023

Los efectos de la implementación de las actividades con gamificación brindan experiencias y estrategias adecuadas para optimizar la motivación y el aprendizaje de los estudiantes de educación básica. En tal sentido, el objetivo del presente artículo es identificar las estrategias y aportes de los efectos de la gamificación en la motivación y aprendizaje. La metodología aplicada para la recolección de la literatura fue por medio de la revisión sistemática. Para ello se seleccionaron 27 artículos publicados en los resultados de búsquedas en las bases de datos de Scielo, Scopus y Web of Science, los cuales fueron desarrollados entre el 2020 al 2022. La revisión de la literatura permitió concluir que la gamificación repercute significativamente en la motivación y el aprendizaje de los estudiantes, alcanzando mejores resultados cuando se complementan con otras estrategias y elementos adicionales al uso de insignias, puntos y tablas de clasificación.
Digital Leadership towards Performance Through Mediation of Organizational Commitment to E-commerce in Indonesia
Authors: Gunawan Ahmad , Yuniarsih Tjutju , Sobandi A , Muhidin Sambas Ali
Published: July 2023

Entrepreneurs with a strong digital focus were crucial to the development of the e-commerce industry in Indonesia. Some online stores' sales have slowed or even declined as a result of the industry's meteoric rise in recent years. Therefore, remedies are required to ensure the long-term health and growth of e-commerce results. The Purpose of this study to search Solutions to this performance issue are sought in this study by examining the relationships between digital leadership, organizational commitment, and performance, three factors that have received much attention from the academic community. Research method used in the study, a quantitative approach was applied. An electronic questionnaire was circulated via the internet in a snowball pattern, yielding the data used in the study. There were 150 high-level employees and managers from market-place businesses who participated in this survey.According to the result of the study, digital leadership does not have a significant impact on performance factors, but it does have a large impact on organizational commitment. On the other hand, organizational commitment does have a substantial impact on performance variables. It has been determined that digital leadership has a considerable effect on performance factors through the mediation of organizational commitments, which leads to the conclusion that indirect interactions are involved. In these findings, it is necessary to increase commitment so that the company's performance can increase and ultimately achieve company goals.
The Effectiveness of Public Services in Realizing Good Governance
Authors: Dharmika Ida Bagus Made Putra , Subanda I Nyoman
Published: July 2023

Public service is one of the strategic issues in Indonesia because it involves basic needs that must be obtained by society and in its implementation there is interaction between public service providers and the society. Public service can be the benchmark for the success of the performance of the governments, and good governance can be implemented. This research aims to observe and provide solutions in the implementation of public service on Investment and Integrated One Stop Service of (IIOSS) Bali Province to realize good governance. Qualitative descriptive research methods with inductive approaches are used. The data was obtained through interviews, the data was then processed using triangulation methods such as  data reduction, data presentation then drawn conclusions. Based on the research results, The quantity and quality of output of IIOSS Bali Province met the 2022 Indonesian Public Service Standards, IIOSS Bali Province  Using the online system saves time, simplifies the service process and provides more transparency of information flow  to public service recipient, IIOSS Bali Province able to adapt well in response to internal and external changes, by developing a website-based digital service called PRESTISE (Electronically Integrated Licensing), IIOSS Bali Province providing  training to the  employees the use of technology also  Community Satisfaction Survey with service recipients selected as respondents showing score of  93,680 (A-level Quality Service). In conclusion, the effectiveness of Public Services at the Bali Provincial Investment and One-Stop Services Office in realizing good governance has been going well and in line with good governance principles.
Terapia musical para trabajar problemas asociados a la dislexia en alumnos de educación general básica
Authors: Espinosa Pullas Anggie Adhamaris
Published: July 2023

La terapia musical conforma un modelo de tratamiento efectivo en ambientes educativos, que busca mejorar las habilidades de lectura y escritura en los niños que tienen dislexia o problemas asociados a ella, pues su aplicación se basa en el uso de la música como medio para desarrollar habilidades que la persona necesita al momento de desenvolverse y explorar el mundo que lo rodea. En este sentido, la investigación propuso la terapia musical como herramienta funcional para trabajar los problemas asociados a la dislexia en niños de Educación General Básica. El estudio fue de carácter documental con enfoque cualitativo, donde se utilizó el método deductivo. En cuanto a los resultados, se presentó que para tratar a niños con dislexia es preferible hacerlo desde la etapa de la infancia (6/12 años), ya que se generan efectos positivos en mayor medida, según los datos arrojados en el cuadro comparativo basado en el estudio de Insuasti (2021) y el desarrollo de la propuesta de Hernando (2017) donde se observó mejorías de varios ámbitos como el desarrollo motriz, cognitivo, lingüístico, perceptivo, auditivo y emocional que contribuyen a la formación integral de los estudiantes.
Predicción de la concentración de calcio soluble en suelos agrícolas de la provincia de Buenos Aires
Authors: Ferro Daniel Adalberto , Andreini Brian Luis , Lozano Luis Alberto , Merani Victor Hugo , Bongiorno Florencia Marlene , Larrieu Luciano , Millán Guillermo José , Soracco Carlos Germán
Published: July 2023

El calcio (Ca) es un nutriente que las plantas absorben en forma de Ca soluble desde la solución del suelo (CaCE) para abastecer sus requerimientos. La variación de su concentración en este estado es compleja y depende de factores naturales y antrópicos. Los suelos de la provincia de Buenos Aires se encuentran naturalmente bien dotados de Ca, pero se han observado zonas con posibles deficiencias debido a la exportación antrópica sin reposición de este elemento. El objetivo de este trabajo fue estimar la concentración de CaCE en suelos de la provincia de Buenos Aires a partir de funciones matemáticas ajustadas y, en consecuencia, conocer los principales parámetros edáficos que predicen su disponibilidad. Se realizó el muestreo de 24 suelos de la provincia de Buenos Aires, y se realizaron determinaciones fisico-químicas de rutina en laboratorios de suelos. Se realizó una regresión lineal múltiple por selección de variables paso a paso (Stepwise). El análisis retuvo las variables conductividad eléctrica (CE) y a la relación entre el Ca intercambiable (CaCIC) respecto a la sumatoria de las bases (S). La ecuación fue: 2,175 CE (dS m-1) + 2,554 CaCIC/S – 0,925, con un R2 de 0,55 (p<0,01). La presencia de la CE se asociaría a la relación con los iones solubles, mientras que la relación CaCIC/S se relacionaría con la reserva de CaCE en suelo. Estos resultados preliminares demostraron que sería factible obtener estimaciones de CaCE soluble más precisas, sugiriendo que se deberá continuar con su estudio para poder comprender con mayor detalle su dinámica en suelos templados.
Rancang Bangun Alat Vacum Test Untuk Mendeteksi Kebocoran Pada Hasil Pengelasan Plat
Authors: Pardi Pardi
Published: July 2023

Metode pemeriksaan hasil pengelasan material plat terdiri dari beberapa macam, mulai dari Destructive Test (DT) dan Non Destructive Test (NDT). Dalam paper ini penulis membahas tentang desain dan pembuatan alat yang dapat dipergunakan untuk melakukan pengujian hasil pengelasan yang cukup murah dan hasil yang cukup akurat. Alat ini dapat mendeteksi keberadaan cacat las berupa lubang atau retak dengan metode vacum. Alat ini terdiri dari beberapa bagian yaitu pompa vacum, selang, box vacum dan beberapa alat pelengkap lainnya. Dengan menggunakan alat ini posisi kebocoran atau retak terdeteksi dengan adanya munculnya gelembung-gelembung udara yang muncul pada alur hasil pengelasan ketika dilakukan vacum test. Daya hisap kerja yang dilakukan dengan alat ini berkisar -0,2 bar. Dengan tekanan tersebut sudah dapat diketahui jika ada kebocoran atau retak pada sambungan las untuk materila plat.
Autoconocimiento como medio para disminuir el estrés en estudiantes de segundo semestre de la especialidad en programación de educación media superior del CECyTEM plantel Toluca
Authors: PLATA-NAVARRETE Raquel , MENDOZA-GONZÁLEZ Nancy
Published: July 2023

It was proposed to carry out an initial diagnosis, to identify the level of stress among students in group 201 of the programming specialty, two measuring instruments were developed and designed: a survey consisting of 34 items, divided into four areas: school stressors stimuli with 11 items, physical reactions with 10 items, psychological reactions with 5 items and psychological reactions with 5 items. with 11 items, physical reactions with 10 items, psychological reactions with 5 items and behavioral reactions with 8 items, semi-structured interview, made up of 25 open-ended questions which were divided into four areas: personal, educational, family and social. From the significant results obtained it was found that in the school environment certain stressors are perceived when there is an excessive load of activities, in addition they do not understand the subjects or they are not explained in depth, something relevant that students can do as a means of channeling stress are some relaxation and distraction activities, also highlights the fact that when feeling stressed the emotions they perceive are anger and sadness which would have to be worked so that they are not a block to stress management.
Asociacionismo e identidad étnica: el caso de los inmigrantes japoneses y sus descendientes
Authors:   , Gómez Silvina Beatriz
Published: July 2023

El desarrollo de la migración japonesa y su comunidad en Argentina presenta aspectos singulares que lo tornan un significativo tema para comprender mejor nuestra sociedad actual. Comprende una corriente migratoria antigua, mayoritariamente libre con escasas entradas recientes, que además incluye una proporción de migrantes llegados a través de un Acuerdo de Migración. Los principales momentos de constitución de esta corriente fueron el período entre principios de S. XX hasta la Segunda Guerra Mundial y posteriormente a la misma. A su vez, son características de esta comunidad su profuso asociacionismo y la fuerte construcción identitaria que tiende a persistir aún después de décadas de la colectividad de haber cesado la inmigración. A través de esta tesis se explora la relación entre la conformación de asociaciones, sus funciones sociales y el denso entramado institucional existente hacia adentro de la comunidad, y la construcción de una identidad étnico-nacional entre los migrantes japoneses y sus descendientes. Para el análisis de dicha construcción identitaria se observan los elementos simbólicos mediante los cuales se producen los procesos de alteridad Nosotros/ellos, en su relación con el resto de la sociedad argentina, con el Japón, y con otras comunidades de migrantes japoneses y descendientes. Asimismo, se toman en cuenta las heterogeneidades existentes, producto de los orígenes en distintas zonas geográficas de Japón, en particular de Okinawa, las épocas de migración (preguerra y posguerra), las zonas de asentamiento y las generaciones del grupo.
On multidimensional exact solutions of a nonlinear reaction-diffusion system
Authors: Kosov A.A. , Semenov E.I. , Tirskikh V.V.
Published: July 2023

We study a multidimensional case of a nonlinear reaction-diffusion system modeled by a system of two parabolic equations with power nonlinearities. Such systems can be used to simulate the process of propagation in space of interacting distributed formations of robots of two types. Such equations also describe the processes of nonlinear diffusion in reacting two-component continuous media. An original version of the reduction method is proposed, which reduces the construction of the dependence of the exact solution on spatial variables to the solution of the Helmholtz equation, and the dependence on time to the solution of a linear system of ordinary differential equations. A number of examples of multiparameter families of exact solutions given by elementary functions are constructed.
On fuzzy paratopological group and decision making during robot crash
Authors: Muneesh Kumar A. , Gnanachandra P. , Acharjee S.
Published: July 2023

In this article, we introduce fuzzy paratopological group, fuzzy semitopological group and fuzzy quasitopological group with illustrative examples and properties. These new notions belong to fuzzy topological group. Here, we prove that each fuzzy regular paratopological group is completely regular by using fuzzy uniformities. Moreover, we prove some results related to fuzzy semitopological group and fuzzy quasitopological group. In addition, we provide an application in the area of decision making during robot crash by using our above stated notions and nano topology.
Two-time capture of coordinated evaders in a simple pursuit problem
Authors: Petrov N.N.
Published: July 2023

In a finite-dimensional Euclidean space, the problem of pursuit of two evaders by a group of pursuers described by a system of the form
$$
\dot z_{ij} = u_i - v,\quad u_i,v \in V,
$$
is considered. It is assumed that all evaders use the same control. The pursuers use counterstrategies based on information about the initial positions and control history of the evaders. The set of admissible controls $V$ is a unit ball centered at zero, target sets are the origin of coordinates. The goal of the pursuers' group is to capture at least one evader by two pursuers. In terms of initial positions and game parameters a sufficient condition for the capture is obtained. In the study, the method of resolving functions is used as a basic one, which allows obtaining sufficient conditions for the solvability of the approach problem in some guaranteed time.
A new hybrid conjugate gradient algorithm for unconstrained optimization
Authors: Hafaidia I. , Guebbai H. , Al-Baali M. , Ghiat M.
Published: July 2023

It is well known that conjugate gradient methods are useful for solving large-scale unconstrained nonlinear optimization problems. In this paper, we consider combining the best features of two conjugate gradient methods. In particular, we give a new conjugate gradient method, based on the hybridization of the useful DY (Dai-Yuan), and HZ (Hager-Zhang) methods. The hybrid parameters are chosen such that the proposed method satisfies the conjugacy and sufficient descent conditions. It is shown that the new method maintains the global convergence property of the above two methods. The numerical results are described for a set of standard test problems. It is shown that the performance of the proposed method is better than that of the DY and HZ methods in most cases.
Numerical solution of nonstationary problem for convection of binary mixture in horizontal layer
Authors: Stepanova I.V. , Zalizniak V.E.
Published: July 2023

Nonstationary motion of a liquid binary mixture in a narrow long horizontal channel with rigid walls heated according to a certain law is considered. The possibility of applying the Ostroumov-Birikh solution to the description of the flow under study is used. It reduces the problem to solving a mixed boundary value problem for a system of parabolic equations. A feature of the problem is an additional integral condition on the fluid flow rate. It allows finding the pressure gradient together with the functions of velocity, temperature, and concentration. Applying the constructed numerical procedure, the analysis of the obtained characteristics of motion is carried out using water-ethanol solution as a mixture. The possibilities of stabilizing the unsteady flow and controlling the motion by means of a periodically changing thermal load on the channel wall are shown.
Letter to the Editor: Correction to the “Kernel determination problem in an integro-differential equation of parabolic type with nonlocal condition” [Vestn. Udmurt. Univ. Mat. Mekh. Komp'yut. Nauki, 2023, vol. 33, issue 1, pp. 90-102]
Authors: Durdiev D.Q. , Jumaev J.J. , Atoev D.D.
Published: July 2023

In this note we give a complete correct formulation and proof of Lemma 1 of [1].