bluuebunny/crossref_metadata_2025 huggingface dataset:
The effects of psychological flexibility and night shifts on mental health and well-being in nurses
Authors: Li Xinhong , Han Juan , Lin Hongmei
Published: November 2024

Background

Examining mental health among nurses in the later stages of the COVID-19 pandemic could offer valuable information for addressing these symptoms in the long term. Therefore, the current study aimed to assess the mental health and well-being of Chinese nurses, as well as investigate the impact of psychological flexibility and night shifts on this relationship.

Method

In cross-sectional, hospital-based, multicenter study, 422 Chinese nurses were selected by multistage stratified cluster random sampling. The mental health status, psychological flexibility, and wellbeing were assessed via 12-item General Health Questionnaire (GHQ-12), Chinese version of Personalized Psychological Flexibility Index, and Chinese version of the 5-item WHO Well-Being Index, respectively. To examine the proposed theoretical model, we conducted structural equation modeling using SPSS Amos 26 version. The age, gender, night shift, psychological flexibility, mental health, and well-being data were entered into the model. Pearson correlation and chi-square were used to explore the correlation between variables.

Results

The high night shifts, being young and low psychological flexibility significantly had a direct effect on worse mental health (night shifts: ES, 95% CI: 0.619, 0.328–0.725; age: ES, 95% CI: 0.542, 0.226–0.993; psychological flexibility: ES, 95% CI: 0.675, 0.369–1.466). The low psychological flexibility and worse mental health were able to directly effect on worse wellbeing (psychological flexibility: ES, 95% CI: 0.419, 0.757–1.519; mental health: ES, 95% CI: 0.719, 1.109–2.607). In addition, psychological flexibility through the mediation of mental health also had an indirect effect on wellbeing (ES, 95% CI: 0.269, 0.957–2.165).

Conclusions

Being young, having more night shifts and having less psychological flexibility can be related to the deterioration of mental health and well-being in nurses. Therefore, it is recommended that nurses use the shift routine program with the least focus on the night shifts. Also, interventions to teach younger nurses how to face work stress and interventions to improve the psychological flexibility of all nurses are needed.
Analytical modeling of novel equivalent circuits of double diode solar cell circuits using a special transcendental function approach
Authors: Ali Ziad M. , Ćalasan Martin , Mostafa Mostafa H. , E. Abdel Aleem Shady H.
Published: November 2024

Solar photovoltaic (PV) cell modeling is crucial to understanding and optimizing solar energy systems. While the single-diode model (PVSDM) is commonly used, the double-diode model (PVDDM) offers improved accuracy at a reasonable level of complexity. However, finding analytical closed-form solutions for the current-voltage (I-U) dependency in PVDDM circuits has remained a challenge. This work proposes two novel configurations of PVDDM equivalent circuits and derives their analytical closed-form solutions. The solutions are expressed in terms of the Lambert W function and solved using a special transcendental function approach called Special Trans Function Theory (STFT). The accuracy of the proposed equivalent circuits is demonstrated on two solar cells/modules, RTC-F and MSX-60, showing equal or better performance than the standard PVDDM equivalent circuit. Further testing on a commercial solar panel under different irradiance and temperature conditions confirms the applicability of the proposed models. To address the parameter estimation problem, a novel metaheuristic algorithm, the chaotic honey-badger algorithm, is developed and evaluated. The results obtained validate the accuracy and practicality of the proposed PVDDM equivalent circuit configurations.
Added sugars and risk of osteoarthritis in adults: A case-control study based on National Health and Nutrition Examination Survey 2007–2018
Authors: Liao Xiaolong , Chen Xiali , Zhou Yumei , Xing Limin , Shi Yihua , Huang Guoxin
Published: November 2024

Objective

Added sugars have been associated with a variety of adverse health consequences, but their relationship with osteoarthritis is unclear. This study aimed to demonstrate the association between added sugars and osteoarthritis.

Methods

We used the National Health and Nutrition Examination Survey (NHANES) database from 2007 to 2018 to explore the association between added sugars and osteoarthritis.

Results

In our study, 2,746 adults were included. The average age of the chosen participants was 43.77 years, with 52.33% males and 47.67% females. There were 2,152 in the osteoarthritis group and 594 in the non-osteoarthritis group, weighted to represent 11,854,966 participants. In the fully adjusted multivariable model 3, added sugars were found as a risk factor for osteoarthritis (OR = 1.01; 95% CI 1.00 to 1.01), with populations in the fourth quartile having a greater prevalence of osteoarthritis (OR = 1.40; 95% CI 1.09 to 1.81). When added sugars were treated as a continuous variable in subgroup analysis, the results indicated that never consumed alcohol (OR = 1.02; 95% CI 1.01 to 1.04) and no history of diabetes (OR = 1.02; 95% CI 1.01 to 1.04)were more Likely tend to osteoarthritis. When added sugars were treated as a categorical variable in subgroup analysis, the results indicated that compared to the first group, in the fourth quartile population, females (OR = 1.44; 95% CI 1.02 to 2.02), low BMI (OR = 1.88; 95% CI 1.06 to 3.33), never smoking (OR = 1.55; 95% CI 1.05 to 2.30), never consumed alcohol (OR = 3.31; 95% CI 1.42 to 7.74), no history of hypertension (OR = 1.51; 95% CI 1.00 to 2.27), and no history of diabetes (OR = 1.44; 95% CI 1.11 to 1.87) were more likely tend to osteoarthritis.

Conclusion

Added sugars are a risk factor for osteoarthritis, especially in females, low BMI, never smoking, never consumed alcohol, no history of hypertension, and no history of diabetes.
Misvaluation and technological acquisitions: An empirical study and mechanism analysis
Authors: Zhou Jinwei , Gao Qizheng , Luo Qi
Published: November 2024

This paper investigates the influence of industry-level overvaluation on technological acquisitions, utilizing merger and acquisition (M&A) data from Chinese listed firms spanning 2007 to 2022. Our analysis confirms that industry-level overvaluation promotes technological acquisitions, a finding that remains significant even after several robustness checks. Compared to acquirers with lower financial constraints, those with higher financial constraints rely more on industry-level overvaluation to drive technological acquisitions. Furthermore, the study indicates that technological acquisitions initiated by industry-level overvaluation tend to enhance the innovative output of the acquirer. By exploring the relationship between industry-level overvaluation and technological acquisitions, this research extends the literature on misvaluation-driven M&A. Additionally, this study provides new evidence and perspectives on the impact of capital markets on the real economy, and contributes to the healthy development of capital markets and M&A markets in emerging countries.
Dietary inclusion of olive cake alone or in combination with Saccharomyces cerevisiae in Black goat kids: Implications for performance and health
Authors: Obeidat Belal S. , Al-Khazaleh Jafar , Thomas Milton G. , Obeidat Mohammed D. , Nusairat Basheer M.
Published: November 2024

Background and Aim: To address the problems associated with the availability and prices of conventional feeds, researchers have started to include alternative feeds to reduce the cost of diets and increase profitability. This study examined the influences of olive cake (OC), either alone or in combination with Saccharomyces cerevisiae (SC), in the diet of black kids.

Materials and Methods: Thirty kids were distributed into three treatments: A free OC diet (control [CON]), OC (20% OC), and OCSC (20% OC with 1 g SC head/d). While penned individually, the kids were fed daily and allowed to acclimate to their diets and pens for 7 days. After acclimation, the kids were fed the prescribed diets for 63 days. Five kids were chosen from each group on day 50 of the feeding period and moved to the metabolic cages to evaluate nutrient digestibility and N balance. At the end of the study, all kids were slaughtered to evaluate carcass characteristics and meat quality.

Results: Feeding the OCSC diet increased (p = 0.035) DM intake for kids compared with the OC and CON. The CP intake was higher (p = 0.021) in the OCSC group than in the CON group. Growth performance parameters were higher (p ≤ 0.031) in the OCSC group than in the CON diet. Feed conversion efficiency was improved (p = 0.052) by incorporating OCSC compared with the CON diet. Consequently, economic return was enhanced (p = 0.003) by feeding the OC and OCSC groups. Kids fed the OCSC had a higher cold carcass weight (p = 0.054) than those fed the CON diet. The OCSC group also showed increased (p ≤ 0.027) loin cut and intermuscular fat weights compared with the OC and CON groups. All measured serum metabolites were similar in CON and groups incorporating OCs or OCSCs.

Conclusion: The results showed that adding 20% OC combined with SC to the diet of growing kids improved some growth and carcass characteristic parameters without affecting their health status. Notably, using OC along with SC could be an option for feed cost reduction in kids’ diets.

Keywords: black goat kids, blood parameters, carcass characteristics, olive cake.
Multiplex immunochromatographic assay using a universal labeling reactant for determining antibiotic residues in milk
Authors: Jangulova Assem N. , Taranova Nadezhda A. , Dzantiev Boris B. , Akanova Zhannara Zh. , Bulashev Aitbay K.
Published: November 2024

Background and Aim: In animal husbandry, antibiotics are frequently used as growth promoters, as well as for illness prevention and treatment. They are considered important toxic and allergenic contaminants of food and a serious risk factor for the spread of antibiotic resistance. National and international regulatory authorities have established limits on the permissible residue of antibiotics in food. Immunochromatographic test strips are the most efficient tools for the simple and rapid control of antibiotics for food safety. In these tests, each antibody specific to a particular antibiotic is labeled with a marker, which complicates the manufacturing technology and increases the cost of the test. This study aimed to develop a multiplex immunochromatographic assay (ICA) to determine streptomycin (STR), tetracycline (TC), and chloramphenicol (CAP) residues in milk by indirect labeling of antibiotic-specific antibodies.

Materials and Methods: Test strips were composed using 15 μm pore size CNPC nitrocellulose membranes, GFB-R4 separation, and AP045 adsorption pads. The applied reactants include TC and STR conjugates with bovine serum albumin, and CAP-soybean trypsin inhibitor conjugate; anti-TC, anti-STR, and anti-CAP mouse monoclonal antibodies; goat anti-mouse immunoglobulin G (GAMI) conjugated with gold nanoparticles (GNPs) and staphylococcal protein A. Milk samples were collected from cows and goats that had not been injected with any antibiotics. STR and TC/CAP at concentrations of 0.27–600 ng/mL and 0.04–30 ng/mL were added to skim milk, respectively. Milk samples were tested by ICA and calibration curves were constructed to determine the sensitivity of the assay for each antibiotic used.

Results: A multiplex ICA of three antibiotic residues in milk was achieved through labeling of immune complexes using a single reagent, GNPs-GAMI. The visual limits of detection (LOD) were 600 ng/mL, 10 ng/mL, and 30 ng/mL for STR, TC, and CAP in cow and goat milk, respectively. Instrumental LODs gave higher sensitivity when analyzed goat milk to STR, TC, and CAP (1.2, 0.05, and 1.3 ng/mL) than cows’ milk (7.27, 0.96, and 2.07 ng/mL, respectively).

Conclusion: The developed approach for manufacturing multiplex ICA tests for the detection of antibiotic residues in milk does not involve labeling specific antibodies and is implemented using only GNP conjugates with anti-species antibodies.

Keywords: antibiotic residues, immunochromatographic assay, indirect antibody labeling, limit of detection, milk.
A transposição da paisagem ficcional da Toca Hobbit das obras de J. R. R. Tolkien: uma análise de hospedagens temáticas brasileiras
Authors: Malta Guilherme Augusto Pereira , Fois Braga Humberto , Almeida Luisa Antunes , Moreira Alexia de Freitas Garcez , Da Silva Gomes Ayla
Published: November 2024

O presente estudo buscou compreender como a paisagem da Terra Média, presente na obra do escritor J. R. R. Tolkien, é transposta semioticamente das linguagens narrativas da literatura e do cinema para a cenarizada, tematizada e habitável do turismo, sobretudo como meio de hospedagem que se torna uma experiência de imersão do hóspede em um mundo possível ficcional. Para tanto, foram realizados, em sites de hospedaria, levantamentos de hospedagens temáticas durante o período de novembro de 2022 a abril de 2023 e, posteriormente, optou-se pelo foco nos meios de hospedagem do Brasil. Para auxiliar nas análises, o campo do Turismo e da Geografia foram essenciais, além do campo da Literatura e Narratologia. Para melhor compreensão dos dados, foram elaborados tabelas e gráficos. A partir da concretização das etapas, notou-se, em meio aos resultados, como a topografia local pode interferir diretamente na facilidade para possuir um posicionamento geográfico similar ao da Toca Hobbit. Além disso, constatou-se que há uma questão estruturante e limitante relativa às possibilidades dos códigos de linguagem específicos para cada um dos diversos sistemas representacionais. Ou seja, há clara complexidade e dificuldade na transposição do texto bidimensional para a realidade ancorada no mundo concreto e que enfrente a escassez de recursos físicos, espaciais e econômicos. Por fim, entende-se o potencial que este trabalho apresenta ao desenvolver um método que dá visibilidade à “tematização paisagística” enquanto construtora de experiências, contribuindo na implementação de uma atração turística pautada na “hospitalidade de mundos possíveis ficcionais". Do ponto de vista prático, a pesquisa buscou auxiliar futuros empreendedores a utilizarem novos parâmetros para concepção de projetos de hospedagem tematizadas, tendo como base o imaginário de Tolkien e o universo fantástico das Tocas Hobbit.
Impact of additional IT investments on firm-level competitiveness
Authors: Fejes Balázs , Stocker Miklós
Published: November 2024

Competitiveness and digitalization are important topics for businesses, as in the rapidly changing environment, they determine the ability to survive and thrive. This study examines the impact of information technology (IT) investments on firms’ competitiveness. The study adopts the dynamic capability approach to examine how IT investments enable firms to adapt to digital transformation and generate value. This study employs causal econometrics methods to test the hypothesis that supplementary IT investments enhance the growth, efficiency, and capital accumulation of firms, which are key indicators of ex-ante competitiveness. The hypotheses are tested on a dataset of 65536 Hungarian firms from 1999 to 2014. Empirical evidence was found to support these hypotheses and confirm the positive relationship between IT investments and firm-level growth, efficiency, and capital accumulation. The findings indicate that a small IT investment does not improve efficiency, while an excessive investment is likely to include irrational investments as well.
Optimizing corporate culture dimensions and operational performance in the context of multinational companies in Kenya
Authors: Okore Lavender , Nyongesa Stella Kasobya , Owuor Patrick Mbullo , Molnár Edina
Published: November 2024

The performance of multinational firms in Eastern Africa has raised concerns about their future sustainability. In this paper, the authors argue that optimal management of corporate culture is a way these firms could improve their operational performance. Edgar Schein’s Model of Culture and the Contingency Theory served as the foundation for the research study. The study utilized the descriptive cross-sectional survey technique, in which structured questionnaires were administered to 150 foreign multinational companies in Kenya. Data were analysed for descriptive statistics, correlation, and multiple regression analysis using SPSS. The results showed that adhocracy and bureaucratic culture had a significant positive influence on operational performance. However, market and consensual culture had a positive influence that was not significant. Empirically, the study contributes to management practice by diagnosing corporate traits as a process factor, especially in instances where activities such as recruitment, onboarding, international management, and innovation are being carried out by an organization.
Intelligent handheld ultrasound improving the ability of non-expert general practitioners in carotid examinations for community populations: a prospective and parallel controlled trial
Authors: Sun Pei , Han Hong , Sun Yi-Kang , Wang Xi , Liu Xiao-Chuan , Zhou Bo-Yang , Wang Li-Fan , Zhang Ya-Qin , Pan Zhi-Gang , Huang Bei-Jian , Xu Hui-Xiong , Zhao Chong-Ke
Published: November 2024

Purpose: The aim of this study was to investigate the feasibility of an intelligent handheld ultrasound (US) device for assisting non-expert general practitioners (GPs) in detecting carotid plaques (CPs) in community populations.Methods: This prospective parallel controlled trial recruited 111 consecutive community residents. All of them underwent examinations by non-expert GPs and specialist doctors using handheld US devices (setting A, setting B, and setting C). The results of setting C with specialist doctors were considered the gold standard. Carotid intima-media thickness (CIMT) and the features of CPs were measured and recorded. The diagnostic performance of GPs in distinguishing CPs was evaluated using a receiver operating characteristic curve. Inter-observer agreement was compared using the intragroup correlation coefficient (ICC). Questionnaires were completed to evaluate clinical benefits.Results: Among the 111 community residents, 80, 96, and 112 CPs were detected in settings A, B, and C, respectively. Setting B exhibited better diagnostic performance than setting A for detecting CPs (area under the curve, 0.856 vs. 0.749; P<0.01). Setting B had better consistency with setting C than setting A in CIMT measurement and the assessment of CPs (ICC, 0.731 to 0.923). Moreover, measurements in setting B required less time than the other two settings (44.59 seconds vs. 108.87 seconds vs. 126.13 seconds, both P<0.01).Conclusion: Using an intelligent handheld US device, GPs can perform CP screening and achieve a diagnostic capability comparable to that of specialist doctors.
Latitudinal Dispersal of Southern North American Glacial Refugial Plants within Yukon, Canada
Authors: Strong Wayne L
Published: November 2024

This study investigates the distribution of southern North American glacial refugial migrants that have invaded Yukon (Canada) since the Last Glacial Maximum (LGM), which began about 9500 years ago. The analysis was based on indigenous vascular plant occurrences that were stratified according to 0.33˚ latitudinal bands. Among 90,397 occurrence records, about 37% were postglacial migrants as opposed to former members of the Eastern Beringian flora. Most migrants probably moved northward from LGM refugia in the western U.S. region (Montana-Idaho-Wyoming) and, to a lesser extent, from the midwestern United States, but several were potentially from a Pacific coast refugium in westernmost Washington-Oregon-northern California. Gradients in taxa composition and richness occurred, with Beringian taxa increasing and migrant taxa decreasing at greater latitudes (+3 vs −0.5 taxa per degree, respectively) based on statistically significant regression trends. An interpretation of ordination results based on taxa presence and absence suggests south-to-north migrating plants are strongly influenced by climate. Only half of all Yukon migrant taxa have geographical ranges that extend beyond the latitudinal centre of the territory. Possible constraints on greater dispersal include competition from pre-existing vegetation, colder northward climates, and the presence of the Ogilvie and Wernecke Mountains across the latitudinal centre of the territory. Just over half (24 of 44) of the taxa that occurred in only one latitudinal band were located immediately north of the southern Yukon border, which suggests glacial refugial migrants are still invading Yukon.
Baroclinic Tide Generation at the Dolphin and Union Strait in the Southern Canadian Arctic Archipelago
Authors: Xu Chengzhu , Wu Yongsheng , Williams William J. , Anstey Kurtis , Wan Di , Greenberg David
Published: November 2024

We studied baroclinic tide generation at the Dolphin and Union Strait, a channel in the southern Canadian Arctic Archipelago that consists of a shallow sill. Utilizing both observational data and numerical simulations, we found that, due to the presence of strong stratification in the summertime, baroclinic tides are generated at both M2 and K1 frequencies as a result of the interaction between the amplified tidal currents and bottom topography. The M2 baroclinic current, which is comparable to the M2 barotropic current in terms of amplitude, is dominated by linear dynamics in the first baroclinic mode. The amplitude of the M2 baroclinic current increases as the strength of stratification increases. In contrast, the K1 baroclinic current has a smaller amplitude in general. Dynamics of the K1 baroclinic current are more complicated, possibly due to nonlinear effects as well as contributions from the higher baroclinic modes. On the other hand, increasing the strength of stratification leads to a noticeable reduction of K1 elevation in the nearby basin, but has a very minor effect on M2 elevation.
Permafrost Food Storage Monitoring and Vulnerability Assessment in Utqiaġvik, Alaska
Authors: Nyland Kelsey E. , Klene Anna E. , Nelson Frederick E. , Shiklomanov Nikolay I.
Published: November 2024

Traditional Iñupiaq sigḷuaq are cellars excavated into permafrost for storage of large quantities of game, fish, and other foodstuffs harvested for subsistence. Permafrost provides both a cultural and regulatory ecosystem service to Arctic peoples. A cellar thermal monitoring program in Utqiaġvik (formerly Barrow), Alaska, documented catastrophic flooding, collapses, and other issues in these cellars related to warming climatic conditions, community functions, and development. This paper provides an update on the Utqiaġvik monitoring program, which was operational from 2005 to 2019. All five monitored cellars exhibited stable to warming mean annual internal temperatures over the period of observation. Two cellars flooded, another was abandoned because of sloughing walls, and two were functioning until the COVID-19 pandemic. Based on experiences gained from the 14-year Utqiaġvik monitoring program, we conduct a vulnerability assessment using the source-pathway-receptor-consequence (SPRC) model and identify several vulnerability reduction measures. We recommend the SPRC model to aid evaluation of specific vulnerabilities of cellars and other traditional frozen infrastructure, and to improve future monitoring methods and products through increased community participation. Any attempt to provide data for community-resilience decisions should start with identifying and communicating process components, thereby bridging stakeholder learning and responses (their “heuristics” in the SPRC model) and science-based knowledge.
A Review of Science and Conservation Management for the Cumberland Sound Beluga Population
Authors: Reeves Randall , Lee David
Published: November 2024

For many centuries, belugas, or white whales (Delphinapterus leucas), have been a major source of subsistence and cultural identity for the Inuit living along the shores of Cumberland Sound, southeastern Baffin Island. During the late 1800s and first half of the twentieth century, the whales were also heavily exploited commercially for their oil and skins. By the late 1960s and early 1970s it had become clear that the beluga population was greatly reduced from its historical abundance, and efforts began to limit the harvest and monitor the population. The purposes of this paper are to (i) provide a synthesis of developments in Cumberland Sound beluga science and harvest management since 1980 and (ii) describe and discuss efforts to improve the conservation status of the beluga population. Despite large investments in research since the transition to co-management under the Nunavut Agreement, much uncertainty and disagreement remains. Best scientific estimates of current beluga numbers are in the range of 1000 – 1500, with no clear evidence of an increasing or decreasing trend. Officially reported annual landings of harvested whales for the Baffin Island community of Pangnirtung in recent years have ranged between 15 (1993) and 52 (2006), with an average of around 40 whales. Ongoing known or potential threats identified by hunters and scientists include overharvest, ecosystem (including climate-driven) change, interactions with commercial fisheries, predation by killer whales, and stress due to vessel noise. Addressing these issues will require continued research and improved relations between Inuit and the government. Fresh approaches are needed. Newly available analytical and procedural tools may help to overcome longstanding issues that are deeply embedded in cultural and philosophical differences.
OPTIMIZATION OF TECHNOLOGICAL MAP OF ACCEPTABLE SYSTEM ENGINEERING SOLUTIONS FOR AQUACULTURE VIDEO ANALYTICS
Authors:   St. Petersburg Federal Research Center of the Russian Academy of Sciences, St. Petersburg, Russian Federation, Ronzhin A.L. , Le V.N. , Shuvalov N.
Published: November 2024

The paper considers the problem of video analytics of aquatic organisms in fish farming industrial complexes. It proposes a conceptual model of the video analytics problem, and a corresponding mathematical formulation of the problem with the search for a subset of acceptable options for the technological map, which boils down to the search for options that satisfy functional criteria. The final decision on the structure and functions of video analytics hardware and software takes into account the cost of the entire life cycle of the equipment. The study emphasizes the importance of automation and intellectualization of technological processes in agriculture, the most pressing modern problems, which are the main focus of the research of advanced teams. The paper discusses primary data for the development and implementation of a video analytics system when solving the problem of counting fish and their mass during transplantation, shipment, and reception into the processing shop. The data were obtained in the framework of cooperation with the Ostrov company, specializing in trout cultivation and paying serious attention to the implementation of modern means of automatization and artificial intelligence in technological processes of industrial aquaculture. Full-scale experiments were carried out and images of fishes were collected in a transparent narrow pipe directed by a stream of water, and in air while moving on a conveyor belt. Further research will be aimed at developing model-algorithmic and software necessary for testing the proposed mathematical models and optimizing options for the technological map of video analytics system.
ASYMPTOTICS OF THE SOLUTION OF ONE VALLEY-POUSSIN PROBLEM WITH AN UNSTABLE SPECTRUM
Authors:   Osh State University, Osh, Kyrgyz Republic, Тursunov D.A. , Sadieva A.S.
Published: November 2024

A differential equation describes the relationship between an unknown function and its derivatives. Such connections are sought in various fields of knowledge: mechanics, physics, chemistry, biology, economics, sociology, oceanology, etc. Systems of ordinary differential equations with a small parameter are used in modeling processes of various natures. Typically, when modeling, small factors are discarded in order to obtain a simpler model from which the necessary information can be extracted. Practice has proven that small factors should be included not in equations, but in solutions. Equations containing small factors are called perturbed. Perturbation theory has been widely used in modern applied mathematics. With its help, researchers answer questions about the influence of various factors on the course of the process, about the stability of the obtained solutions, the proximity of the processes described by the obtained solutions to the real objects under study. The article studies the Vallée-Poussin problem for a system of inhomogeneous linear singularly perturbed ordinary differential equations of the first order. The peculiarity of the problem under consideration is that the spectrum of the matrix, which is the coefficient of the linear part of the system, is unstable at three points of the segment under consideration. It is required to construct a uniform asymptotic expansion of the solution to the problem, modifying the classical method of boundary functions.
Optimizing agro-waste substrates for enhanced enzymatic production in ethnomedicinal mushroom Lentinus squarrosulus Mont.
Authors: Saravanan K Ganesh , Thiribhuvanamala G , Angappan K , Praveen T , Revathy N , Anandham R , Jayakanthan M
Published: November 2024

The ethnomedicinal subtropical mushroom Lentinus squarrosulus Mont. is a polypore with high wood-degrading potential. This study aimed to collect L. squarrosulus isolates, analyze lignocellulolytic enzymes - Laccase (Lac), Lignin peroxidase (LiP) and Manganese peroxidase (MnP) and evaluate substrates for mass production. Sporophores of Lentinus sp. (Isolate L1 to L5) were collected from different regions of Tamil Nadu and characterized morphologically and molecularly. Qualitative screening tests with guaiacol substrate demonstrated the production of laccase by all the isolates; however, isolate L3 showed maximum reddish-brown zonation. Additionally, isolate L3 produced the highest green colouration on the ABTS (2,2’-azino-bis 3-ethylbenzthiazoline-6-sulfonic acid) substrate. This confirmed the oxidation of ABTS to ABTS-azine in the presence of laccase, outperforming the other L. squarrosulus isolates. All the isolates tested with Azure-B agar for LiP and MnP showed faint discolouration, suggesting lower secretion of peroxidase enzymes. Quantitative analysis using a lignolysis basal medium also confirmed that isolate L3 secreted Lac predominantly, followed by LiP and MnP enzymes extracellularly. All isolates showed peak Lac activity at pH 4.5, while LiP and MnP production were highest at pH 5.0. The optimal temperature for all lignolytic enzymes was 28±2ºC. Maximum laccase secretion occurred between the 5th - 7th day after inoculation (DAI), with LiP and MnP peaking at 7 DAI. Nine agro-waste substrates were evaluated, with isolate L3 showing the highest biological efficiency on Paddy straw (99.62%), followed by Arecanut sheath (97.43%) and Groundnut shell (95.15%). This study enhances our understanding of L. squarrosulus enzymatic capabilities. It provides insights for mass production, which has strong potential for industrial bioremediation and waste management due to its high laccase production.
Gestaltung von E-Learning-Angeboten in Bibliotheken zur Förderung der Medien- und Informationskompetenz
Authors: Petschenka Anke
Published: November 2024

In einer digitalisierten Welt wird die Förderung von Medien- und Informationskompetenz immer wichtiger. Bibliotheken spielen bei der Vermittlung dieser Kompetenzen eine Schlüsselrolle und stehen vor der Herausforderung, ihre Dienstleistungsangebote zeitgemäß zu gestalten. E-Learning-Angebote gewinnen an Bedeutung, um Wissen und Bildung flexibel, interaktiv und bedarfsgerecht zugänglich zu machen.
Страницы истории журнала «Искусство и художественная промышленность» (1898–1902)
Authors: Грачева Светлана Михайловна
Published: November 2024

Журнал «Искусство и художественная промышленность» издавался с 1898 по 1902 гг. и начал выходить почти одновременно с известным журналом «Мир искусства». Редактором журнала был Н. П. Собко. До недавнего времени журнал «Искусство и художественная промышленность», во многом из-за участия в нем В. В. Стасова, оценивался как довольно консервативный, связанный с эстетикой XIX века, не выполнивший возложенную на него миссию новаторского издания. Благодаря последним исследованиям по истории русской журналистики, библиографии и критики, мнение о журнале изменилось. Его стали оценивать как эстетический феномен, имеющий много ярких художественных качеств. В статье на основе архивных материалов и переписки рассматривается история журнала, выявляется роль Н. П. Собко и В. В. Стасова в нем, анализируются наиболее значимые публикации, сделанные в этом издании. В статье с опорой на архивные материалы воссоздается цельная картина возникновения журнала и характеризуется деятельность основных фигур, связанных с ним. Благодаря сохранившимся документам можно определить место и роль журнала в истории русской культуры.
Gradient bounds and Liouville property for a class of hypoelliptic diffusion via coupling
Authors: Qian Bin , Zhang Beibei
Published: November 2024

In this paper, we obtain the reverse Bakry–Émery-type estimates for a class of hypoelliptic diffusion operator by coupling method. The (right and reverse) Poincaré inequalities and the (right and reverse) logarithmic Sobolev inequalities are presented as consequences of such estimates. Wang–Harnack inequality, Hamilton’s gradient estimate and Liouville property are also presented by the reverse logarithmic Sobolev inequality.
Characterization of multiplicative Jordan n-higher derivations on unital rings
Authors: Kawa Ab Hamid , Hasan S. N. , Ali Shakir , Wani Bilal Ahmad
Published: November 2024

Let

m
≥
1

{m\geq 1}

,

n
≥
3

{n\geq 3}

be fixed integers,

ℛ

{\mathscr{R}}

be a unital ring with a nontrivial idempotent, and let

ζ
m

:

ℛ
→
ℛ

{\zeta_{m}:\mathscr{R}\to\mathscr{R}}

be a multiplicative Jordan n-higher derivation

(

n
≥
3

)

{(n\geq 3)}

. In this paper, we prove that if

c
⁢
h
⁢
a
⁢
r
⁢

(
ℛ
)

≠

2

⁢

𝑎𝑛𝑑

≠

n
-
1

{char(\mathscr{R})\neq 2~{}\textit{and}~{}\neq n-1}

, then

ζ
m

{\zeta_{m}}

is an additive Jordan n-higher derivation, more precisely,

ζ
m

⁢

(
a
)

=

D
m

⁢

(
a
)

+

π
m

⁢

(
a
)

{\zeta_{m}(a)=D_{m}(a)+\pi_{m}(a)}

for all

a
∈
ℛ

{a\in\mathscr{R}}

, where

D
m

:

ℛ
→
ℛ

{D_{m}:\mathscr{R}\to\mathscr{R}}

is an additive higher derivation and

π
m

:

ℛ
→
ℛ

{\pi_{m}:\mathscr{R}\to\mathscr{R}}

is an additive singular Jordan higher derivation.
A relationship between the structure of a quotient ring and
*
*
-identities involving pair of derivations
Authors: Zerra Mohammed , Oukhtite Lahcen , Jorf Mohamed
Published: November 2024

Our fundamental aim in this paper is to study certain

*

{*}

-identities with pair of derivations acting on a prime ideal P and investigate commutativity of a quotient ring

R
/
P

{R/P}

where R is any ring. Some well-known results characterizing commutativity of prime rings have been generalized. Finally, examples are given to demonstrate that the restrictions imposed on the hypothesis of our results are not superfluous.
Algebraic dependence of the Gauss maps on minimal surfaces immersed in ℝ
n+1
Authors: Quang Si Duc , Hang Do Thi Thuy
Published: November 2024

Let

S
1

,

S
2

,

S
3

{S_{1},S_{2},S_{3}}

be oriented non-flat minimal surfaces immersed in

ℝ

n
+
1

{{\mathbb{R}}^{n+1}}

(

n
≥
2

)

{(n\geq 2)}

with the Gauss maps

G
1

,

G
2

,

G
3

{G_{1},G_{2},G_{3}}

into

ℙ
n

⁢

(
ℂ
)

{{\mathbb{P}}^{n}({\mathbb{C}})}

, respectively. Assume that there are conformal diffeomorphisms

Φ
2

,

Φ
3

{\Phi_{2},\Phi_{3}}

of

S
1

{S_{1}}

onto

S
2

,

S
3

{S_{2},S_{3}}

respectively and let

f
1

=

G
1

{f^{1}=G_{1}}

,

f
2

=

G
2

∘

Φ
2

{f^{2}=G_{2}\circ\Phi_{2}}

,

f
3

=

G
3

∘

Φ
3

{f^{3}=G_{3}\circ\Phi_{3}}

. In this paper, we will show that

f
1

,

f
2

,

f
3

{f^{1},f^{2},f^{3}}

are algebraic dependence, i.e.,

f
1

∧

f
2

∧

f
3

≡
0

{f^{1}\wedge f^{2}\wedge f^{3}\equiv 0}

, if they have the same inverse images for a few hyperplanes of

ℙ
n

⁢

(
ℂ
)

{{\mathbb{P}}^{n}({\mathbb{C}})}

in general position with some certain conditions.
Limit cycles for a kind of piecewise differential system with switching line y = 0
Authors: Rezaiki Nabil , Boulfoul Amel
Published: November 2024

This paper aims to determine the maximum number of limit cycles that can bifurcate from the linear center

x
˙

=
y

{\dot{x}=y}

,

y
˙

=

-
x

{\dot{y}=-x}

, when we perturb it inside a class of piecewise smooth differential systems, which are separated by the straight line

y
=
0

{y=0}

. Using the averaging theory of first order for piecewise smooth differential systems, we prove that if the degree of the polynomial that appears in the perturbation term is equal to n, then the maximum number of limit cycles bifurcating from the period annulus around the linear center is at most n or

n
-
1

{n-1}

, and this number can be reached.
Which factors predict teachers’ evaluation of the difficulty and usefulness of phrasal verbs in L2 contexts?
Authors: Sonbul Suhad , El-Dakhs Dina Abdel Salam
Published: November 2024

Research examining teachers’ cognition of lexical items has flourished in the past few years. However, most of these studies focused on individual words rather than formulaic sequences. The present study aims to fill this gap through eliciting teachers’ evaluation of one type of formulaic sequences: phrasal verbs (PVs). The aim is to examine factors (frequency, opacity, and learners’ receptive and productive knowledge) that might predict teachers’ evaluation of the difficulty and usefulness of 100 PV senses. For that purpose, a survey was administered to 174 teachers. Results of generalized mixed-effects modelling showed that teachers’ assessment of both the usefulness and difficulty of PVs was predicted by sense-specific corpus frequency and receptive knowledge of these PV senses. Moreover, difficulty ratings were additionally affected by opacity and productive knowledge of PVs. We discuss these findings in relation to previous research on L2 PV knowledge and implications for L2 teaching practice.
Uncertainty principles for the Dunkl–Weinstein–Stockwell transform
Authors: Soltani Fethi , Maktouf Ibrahim
Published: November 2024

In this paper, we prove a Heisenberg
uncertainty inequality and a local uncertainty inequality for the
Dunkl–Weinstein–Stockwell transform. We give also a Shapiro-type
uncertainty inequality for this transform.
Recovery analysis for the ℓ
p
/ℓ1 minimization problem
Authors: Zhou Zhiyong
Published: November 2024

In this paper, we present a theoretical analysis of the

ℓ
p

/

ℓ
1

{\ell_{p}/\ell_{1}}

minimization method with

0
<
p
<
1

{0<p<1}

for sparse signal recovery.
We provide a verifiable sufficient condition for the exact noiseless sparse recovery and establish reconstruction error bounds using q-ratio constrained minimal singular values (CMSV) and restricted isometry property (RIP) tools. Additionally, we adopt an efficient algorithm to solve the optimization problem and conduct numerical experiments to demonstrate its superior performance.
Collective Management of Environmental Resources: Historical-Anthropological Insights from the Slovenian Karst (19th century to post-socialism)
Authors: Beltrametti Giulia
Published: November 2024

This paper presents the first results of a two-year interdisciplinary research project on the collective management of environmental resources in the Slovenian Karst region from the 19th century through the post-socialist era. Utilizing both anthropological fieldwork and historical archival research, the study explores the historical continuity and discontinuity of local agrarian communities’ practices in managing forests, land and pastures. The research emphasizes the socio-legal capacity of these communities to produce, claim, and negotiate rights amidst varying administrative and political regimes, from the Habsburg Empire to independent Slovenia. The study also compares similar cases in other Eastern European post-socialist countries, highlighting the complex dynamics of re-socialization and ownership morphologies. The findings suggest that a nuanced understanding of the historical and social contexts is crucial for interpreting the collective management of natural resources, with implications for current and future resource accessibility and sustainability.
DEVELOPMENT OF BIODEGRADABLE ACTIVE FOOD PACKAGING FROM AGRICULTURAL WASTES: PRODUCTION, CHARACTERIZATION, AND APPLICATION OF FILMS WITH BANANA PEEL AND OLIVE LEAF EXTRACT
Authors: Yıldız Eda , Kuş Nur , Guner San Selen , Şumnu Servet Gülüm
Published: November 2024

The objective of this study is to produce a biodegradable active food package by using agricultural wastes; banana peel and olive leaf extract (OLE). To investigate the possible effect of plasticized starch at different concentrations (0%, 5%, 10%, and 15%), corn starch was added to the films. The films were analyzed in terms of physical characteristics (moisture content, swelling degree, water solubility, density, opacity), water vapor permeability, and mechanical properties. In addition, the phenolic content and antioxidant activity of the films were measured and antimicrobial activity of the films were tested on common food-borne pathogens. Films with better characteristics (B_S15_OLE) were selected to investigate the possible influence of the active films on shelf life of strawberries. Finally, it was shown that at the end of 10days, the films were almost completely decomposed.
Repeated courses of electrical stimulation for traction neuropathies of the sciatial and femoral nerves after endoprosthetics
Authors: Meshcheryagina Ivanna A.
Published: November 2024

Objective: to substantiate the indications for repeated courses of electrical stimulation using a temporary implanted epidural electrode in patients with traction neuropathies after hip replacement. Material and methods. A method of puncture implantation of epidural electrodes was used to conduct a course of electrical stimulation. An analysis of 162 electrode implantations was performed. The results of treatment of 73 patients with neuropathies of the sciatic (n=65) and femoral (n=8) nerves after hip replacement are presented. The follow-up period was 5.5 years. Results. There was a 2-fold increase in the number of hospitalizations for every 4.5 months of interval between endoprosthetics and the first course of electrical stimulation. Depending on the initial neurological deficit, an increase in the number of hospitalizations by an average of half is predicted to increase muscle strength by 1 point. The maximum number of hospitalizations in this category of patients is 8, the average number of hospitalizations is 3. Conclusion. Indications for repeated courses of electrical stimulation using a temporary implanted epidural electrode in patients with traction neuropathies after hip replacement are substantiated. Epidural electrical stimulation allows you to relieve pain associated with traction damage to nerve axons; repeated courses of electrical stimulation contribute to a more complete restoration of nerve function.
Predictive model of nocturnal hypoglycemia based on the data from mobile application for glucose monitoring
Authors: Rusanov Arseniy N. , Rodionova Tatiana I.
Published: November 2024

Objective: to develop a prognostic algorithm of nocturnal hypoglycemia (NH) based on the glucose monitoring mobile application data. Material and methods. The retrospective analysis of 524 continuous glucose monitoring (CGM) profiles of patients with type 1 diabetes mellitus was performed. CGM was performed using the Medtronic iPro2 system for 6-7 days, overnight periods of CGM were analyzed to identify systematic NH. There were 239 patients included in the study, among them 65 (27.1%) were identified as having systematic NH. Models of 7-point glycemic profiles were built and their data were uploaded to the DiaLog GM mobile application to calculate standardized glucose monitoring parameters. The prognostic model of NH was developed based on the logistic regression method. Results. According to the results of regression analysis the most significant predictors of NH included in the prognostic model were: glycated hemoglobin (p=0.001), using of insulin pump therapy (p=0.001), time below target range level 1 (p<0.001), coefficient of variation for glucose (p=0.02). The area under the ROC curve for the prediction model was 0.917; the optimal cut-off point for the predicted probability of NH was 0.317, with model sensitivity of 85% and specificity of 90%. Conclusions. The developed prediction model based on data from a specialized mobile application allows to improve the existing approaches to NH risk assessment due to higher predictive ability.
Department of Hospital Pediatrics and Neonatology of Saratov State Medical University named after V.I. Razumovsky celebrates its 75th anniversary
Authors: Chernenkov Yuriy V. , Eiberman Alexander S. , Vorotnikova Nataliya A. , Gumeniuk Olga I. , Panina Olga S.
Published: November 2024

The article presents the history of the formation and development of the leading department of the pedi-atric faculty of Saratov State Medical University named after V. I. Razumovsky. The path of formation of the scientific school of pediatric gastroenterology is traced. The main directions of educational, scientific and medical work of the staff of the department are highlighted.
Crowdsourcing as a Pedagogical Tool in Computer Science Higher Education: a Case Study
Authors: Lyberatos Vassilis , Kantarelis Spyridon , Kaldeli Eirini , Bekiaris Spyros , Tzortzis Panagiotis , Menis-Mastromichalakis Orfeas , Stamou Giorgos
Published: November 2024

The approach used and the insights gained from employing crowdsourcing techniques in a computer science homework assignment for higher education students are described in this paper. Making use of a platform that supports crowdsourcing in the cultural heritage domain, students were solicited to enrich the metadata associated with a selection of music tracks. The results of the campaign were further analyzed and exploited by students through the use of semantic web technologies. In total, 98 students participated in the campaign, contributing more than 6400 annotations concerning 854 tracks. The process also led to the creation of an openly available annotated dataset, which can be useful for machine learning models for music tagging. The outcomes of the campaign and the feedback collected via an online questionnaire allow us to draw useful insights about the challenges and benefits of incorporating crowdsourcing techniques into computer science curricula and the educational gains for students.
Cultural Values and Negative Politeness in English and Russian
Authors: Larina Tatiana
Published: November 2024

The phenomenon of politeness is universal and, at the same time, is culture-specific. Traditionally, it is defined as respect and consideration for other people. However, this definition does not work in the intercultural aspect as the concepts of politeness, respect, and consideration are understood differently, and even these words have different meanings. In this paper, politeness is viewed as strategic behaviour, a system of culturallyspecific and highly ritualised communicative strategies that maximise harmonious interaction and minimise the possibility of conflict. The present research is mainly based on Brown and Levinson’s politeness theory (1978, 1987), which gives an effective mechanism for understanding interlocutors’ communicative behaviour. Still, the main emphasis is on the principal strategic differences between English and Russian negative politeness and the attempt to explain them through social organisation and cultural values. The paper gives empirical data on such Speech Acts as Command and Invitation. The comparative analysis was conducted based on ethnographic observation, questionnaires and interviews.