bluuebunny/crossref_metadata_2025 huggingface dataset:
Does ICT diffusion exacerbate or mitigate the environmental impacts of renewable energy projects in Sub-Saharan Africa?
Authors: Bello AAbdulwahab Ahmad , Hassan Abubakar , Bekun Festus , Aliyu Umar , Akadiri Seyi
Published: September 2024

The interplay between ICT, renewable energy, and CO2 emissions is a critical area of research, especially in the context of Sub-Saharan Africa, which faces significant challenges in terms of energy access, environmental sustainability, and technological development. This study examines the direct impact of information and communication technology (ICT) on environmental quality and its indirect impact through its interaction with renewable energy consumption. It also controls for other important macroeconomic variables across 48 Sub-Saharan African (SSA) countries from 2005 to 2020. The research employs various econometric panel data methods, including standard linear regression pooled-OLS, fixed-effects, random-effects models, and a more robust system-GMM approach. The results indicate that increased energy consumption, urbanization, and education negatively affect environmental quality, whereas trade openness has a positive impact. These findings are significant for policymakers, especially in the context of globalization and Africa's growing integration into the world economy through the African Continental Free Trade Area (AfCFTA) Agreement and the accompanying urbanization challenges. The study suggests an urgent need for a sustainable environmental strategy. It also highlights that the interaction between renewable energy and ICT diffusion can enhance environmental quality in SSA, implying that investments in R&D for renewable energy technologies are crucial for achieving environmental sustainability.
JEL Classification :C23, Q43, Q53
The Impact of a Romantic Partner on Patient Experience of Heart Rate Variability Biofeedback: Recommendations and Considerations for Clinicians
Authors: Knauss Adrian , Jensen Jakob , Fish Matthew , Bolin Linda , Brimhall Andrew
Published: September 2024

Biofeedback is a health intervention that trains people to exert control over physiological processes through real-time monitoring and feedback mechanisms (Schwartz et al., 2016). One modality, heart rate variability biofeedback, can be used to promote self-regulation and manage stress (Lehrer et al., 2020; Tan et al., 2016). However, these interventions are often conducted individually and practitioners rarely utilize the patient’s social network to assist in the development of self-regulation skills (Frank et al., 2010; Schwartz et al., 2016). This is a notable omission since research has established that social systems impact patients’ psychophysiology (Kleinbub, 2017). Participants (N = 12) completed a heart rate variability biofeedback intervention with their romantic partner either present or absent from the room. A qualitative interview was conducted with the romantic partners (N = 12) to explore how the presence or absence of a partner impacted the participants’ experience of the intervention. Based on the themes generated from the interviews, a series of recommendations for clinicians are provided to encourage participation of social support persons during biofeedback interventions.
Exploring Inflammatory Bowel Disease in Familial Mediterranean Fever Patients: Insights From a Retrospective Study
Authors: Yayla Emine Nur Sunar , Yıldırım Deniz Gezgin , Öztürk Hakan , Sarı Sinan , Söylemezoğlu Oğuz
Published: September 2024

Background
In light of the accepted association between familial Mediterranean fever (FMF) and inflammatory bowel disease (IBD), as well as the limited previous research on this subject, this study aimed to investigate the prevalence of IBD among individuals diagnosed with FMF and to explore the clinical features and genetic mutations present in FMF patients with IBD.
Methods
The study was conducted among patients diagnosed with FMF between 2006 and 2022. Patients diagnosed with IBD were included. Patient records were reviewed for demographic data, presenting symptoms and their duration, laboratory results at the time of initial diagnosis and during follow-up, colonoscopy findings, treatments administered, and post-treatment follow up colonoscopy results.
Results
Among 1176 patients diagnosed with FMF, 9 patients (0.76%) also diagnosed with IBD were included in the study. Genetic analysis showed that all patients had a detected MEFV gene mutation, with the M694V mutation being the most frequently observed. Approximately 44% of FMF and IBD patients exhibit homozygosity for the M694V mutation. Among 1122 FMF patients analyzed for MEFV gene mutations, 19% were homozygous for this variant. The frequency of the M694V homozygous mutation is higher in patients with both IBD and FMF compared to those with only FMF (p = 0.079). In the patients with IBD, diarrhea was the most common presenting complaint. Fever attacks accompanied by abdominal pain were observed in all patients. Further investigations through colonoscopy were conducted on 9 patients, revealing inflammation in the colonic mucosa in the majority (66%). All patients had been receiving colchicine. Methylprednisolone, mesalamine, azathioprine, tumor necrosis factor (TNF) inhibitors, and interleukin-1 (IL-1) inhibitors were among the treatments administered. Following the treatment, all patients experienced a reduction in symptoms, and acute phase reactants were found to be negative in all except one (6.6%).
Conclusion
The prevalence of IBD is increased in FMF patients with M694V homozygous mutation. Therefore, careful monitoring and thorough evaluation, including colonoscopies, are crucial for assessing IBD risk in these individuals.
The impact of regular physical activity on health-related quality of life among young employees
Authors: Hasni Achref , Bedhioufi Hafsi
Published: September 2024

Objectives
This article examines the impact of regular physical activity on the health of young Tunisian employees.
Methods
This study employed a cross-sectional design involving 400 young employees aged between 18 and 35 from a various field of work. Health status was assessed using the SF-36 questionnaire, which evaluates the physical and mental components of health using eight subscales. Data were analysed using the Mann-Whitney U test.
Results
Our analysis reveals significant differences between physically active and inactive employees (p < 0.05). For the physical component, the General Health, Functioning Physical, Physical Role and Bodily Pain subscales revealed p-values of less than 0.05, indicating that physically active people perceive themselves as having better overall physical health. In terms of the mental component, the Emotional Role, Mental Health and Vitality subscales showed p-values of less than 0.05, indicating better mental and emotional health among practitioners. The Social Functioning subscale showed no significant difference, but the composite analysis of the mental component revealed a significant difference (p < 0.05).
Conclusions
Our research highlights the importance of regular physical activity in improving the physical and mental health of young employees.
Exploring the Microbiome of Fermented Soy Products: Implications for Gut Health in China
Authors: Xiang Xuesong , Li Yingying , Ye Junbin , Li Baolong , He Guozhong , Zhu Mingyu , Zhang Jiawen , Zhang Bike , Miao Ming , Yang Yuexin
Published: September 2024

Background:Fermented foods have a long history in China, and they continue to be widely consumed today. Fermented foods have recently been reported as a pivotal approach to restoring gut microbial diversity and are recommended by the International Scientific Association for Probiotics and Prebiotics for inclusion in dietary guidelines. However, there are potential safety concerns associated with fermented foods, such as the transfer of antibiotic resistance genes to the human gut. This underscores the need for a deeper understanding of the microbial communities in fermented foods and additional data to facilitate health risk assessments.Results:In this study, we employed shotgun metagenomic analysis to investigate the microbiota of three commonly consumed fermented soy products in China and compared them with the gut microbiota of the Chinese population. Our findings revealed significant differences in both the microbial composition and functions among these three fermented soy products. Intriguingly, network analysis revealed an antagonistic interaction between beneficial speciesBacillalesandLactobacillales, and potentially harmful speciesEnterobacterales. In examining the Chinese gut microbiota, we identified a high prevalence of potentially harmful bacteria from the Enterobacterales order, which were also found in significant amounts in fermented foods. Using genome-level and strain-level analyses, we hypothesize that fermented foods may serve as a source of harmful bacteria, such asKlebsiella pneumoniaeandKlebsiella quasipneumoniae, for gut microbiota. Horizontal gene transfer analysis highlighted the potential transfer of numerous antibiotic resistance genes from fermented foods microbes to those in the human gut microbiome.Conclusions:While there is substantial evidence supporting the potential health benefits of consuming fermented foods, our research highlights important safety concerns. Notably, consuming fermented foods could increase exposure to pathogenic microorganisms and increase the risk of antibiotic resistance gene transmission. This accentuates the need for enhanced microbial monitoring and quality control measures for fermented foods.
Iron Deficiency and Its Cognitive Effects Among University Women: Findings From a Cross-sectional Study
Authors: BENEDETTI FABIO , Franzon Evelin Centenaro , Mastella Gustavo Antunes , Zugno Alexandra Ioppi
Published: September 2024

Iron deficiency is considered a worldwide problem, with an incidence of 10 to 15% in the adult female population in developed countries and estimated to double in developing countries. In the adult population, some studies have shown a relationship between cognitive deficit in the population with iron deficiency. However, this evidence is still incipient, despite its biological plausibility regarding the influence of iron on monoamine metabolism. With the aim of correlating anemia and iron deficiency with cognitive impairment, this cross-sectional study recruited university women of childbearing age, assessing their hemoglobin, iron stores, and their executive functions using the 19-position Tower of London test. In addition, cobalamin deficiency, hypothyroidism, and depression were evaluated to avoid possible confounders. Anemia was found in 8% of the participants, while 30% had iron deficiency. Among the participants, 43% of depression criteria were observed, measured by the PHQ-2 test. No statistical correlation was found between anemia or iron deficiency and performance in the cognitive test. On the other hand, a correlation was found between depression and iron deficiency. It is likely that this study did not find a correlation between anemia or iron deficiency and cognitive performance because the sample size became insufficient due to the high prevalence of depression, which may have interfered with cognitive test performance. Additionally, the prevalence of anemia was lower than that reported in global literature. This study draws attention to the high rate of depression in the population of young university students and points to its correlation with iron deficiency, while showing the need for further studies in this area, still leaving open the possibility of a relationship between executive function performance and iron deficiency.
How BMI-restrictive policies impact women seeking NHS-funded IVF in the United Kingdom: A qualitative analysis of online forum discussions
Authors: Muir Rebecca , Hawking Meredith K.D.
Published: September 2024

Background: Across the United Kingdom’s National Health Service (NHS), women* with a Body Mass Index (BMI) of >30 face restrictions accessing In Vitro Fertilisation (IVF) treatment. This study asks: what are the (un)expected and (un)intended harms and consequences experienced by women restricted from accessing NHS-funded IVF due to BMI threshold criteria?
Methods:Posts from a popular infertility online forum were collected and reflexively thematically analysed.
Results:On the forum, users discussed how they struggled to lose weight, how they faced time pressures to meet BMI thresholds, and they shared knowledge on how to comply or appear compliant with BMI cut-offs. Our study found widespread moral discourses around body weight were reproduced in the forum, particularly commonplace narratives that body weight is under personal control, that people with a high BMI should ‘work’ to change their bodies, and that this work helps demonstrate deservingness for IVF treatment. Moralising discourses around weight were linked to the responsibilities of a hoped-for future of motherhood, as users performed deservingness through emphasising their commitment to meeting the BMI threshold.
Conclusion: We conclude that NHS-IVF policies in the United Kingdom do not consider the burdensomeemotional and moral work placed on people seeking treatment due to inflexible upper-limit BMI criteria.
Comparative analysis of the trends in thyroid cancer burden in China and worldwide from 1990 to 2021
Authors: Zhang Yuhan , Wang Hanyu , Chen Xiao , Wang Zixuan , Liu Jiaqi , Sun Hui
Published: September 2024

In recent years, the incidence of thyroid cancer has been increasing, posing a significant public health problem. This study aims to assess the burden of thyroid cancer in China and globally between 1990 and 2021. It seeks to elucidate trends in incidence, prevalence, mortality, and disability-adjusted life years (DALYs), while also identifying variations across different age groups and genders. Data were extracted from the Global Burden of Disease (GBD) database from 1990 to 2021, focusing on thyroid cancer indicators in China and globally. We calculated age-standardised incidence (ASIR), age-standardised prevalence (ASPR), age-standardised mortality (ASMR), and age-standardised DALY rate (ASDR) for each age group, and analyzed the annual percentage change (APC) in trends over the study period using Joinpoint regression models. In China, the incidence of thyroid cancer increased by 295.70% between 1990 and 2021, with a significant annual increase of 2.242%. The global incidence increased by 177.62% and the APC was 1.139%. While ASMR declined slightly both in China and globally, ASPR showed a substantial increase. It is worth noting that the burden of thyroid cancer is higher in women, and the increased risk of developing the disease has been more pronounced in men in recent years. The findings highlight the need for targeted prevention strategies, improved diagnostics to avoid overdiagnosis, and equitable allocation of public health resources to address the growing thyroid cancer challenge.
Social disconnection and paranoid thoughts in the general population sample: A network analysis investigating differential associations of social isolation and loneliness
Authors: Misiak Błażej
Published: September 2024

Purpose
Social disconnection has been implicated in the development of paranoia. Yet, both components of social disconnection, i.e., social isolation and loneliness, were mostly investigated separately. The present study aimed to explore as to whether social isolation and loneliness show differential associations with paranoid thoughts.
Methods
The study was based on a representative sample of 5,099 general population adults (aged 44.9 ± 15.4 years, 52.2% women). Self-reports were used to assess psychopathological symptoms, cognitive processes, perceptions of social interactions, loneliness, and social isolation.
Results
Linear regression and network analyses were performed. Loneliness and social isolation were significantly and independently associated with paranoid thoughts in linear regression analyses. Paranoid thoughts were more strongly associated with loneliness than social isolation. No significant association of the interaction between social isolation and loneliness with paranoid thoughts was found. A network analysis revealed that the nodes representing social isolation and loneliness were not directly connected to the nodes of paranoid thinking. In the shortest pathways, loneliness and social isolation were independently associated with paranoia. The shortest pathway between loneliness and paranoia led through only one mediating node representing external attribution biases. In turn, the shortest pathway between social isolation and paranoia led through two mediating nodes representing social anhedonia and external attribution biases.
Conclusion
The findings imply that social isolation and loneliness might exert additive effects on the occurrence of paranoid thoughts. External attribution biases and social anhedonia might play important roles in the association of social disconnection with paranoia.
Mathematical Models for Predicting Network Traffic in Cloud Computing Environments
Authors: Liu Xingyu , Zhong Zhongkezhen , Chen Chenxi , Cha Junjie , maan troy
Published: September 2024

Effective network traffic prediction is crucial for optimizing resource allocation and ensuring efficient performance in cloud computing environments. In this research, mathematical models are developed to use historical data, factors, and other data to predict future network traffic patterns more effectively. In this context, we then compare an array of time series models such as ARIMA, LSTM, as well as the Prophet model so that we can determine the cloud environments most appropriate for each. These models include time and day of the week as well as the general activities of the users in the network in order to mimic the real flow of network traffics. The experimental results concern the efficiency of the proposed models as opposed to existing approaches and give a lot of information to network administrators and cloud service providers. The outcomes make a significant contribution as to the formulation of intelligent approaches in resource management and improve the dependability and performance of cloud computing environments.
Adaptive investment behaviours enable earlier carbon peak in low-carbon electricity transition
Authors: Zou Hongyang , Du Huibin , Zuo Jian , He Gang , Feng Kuishuang , Yang Yuting , Wang Chengshan , Tang Lixin , Brown Marilyn
Published: September 2024

Electricity planning often employs average production costs and efficiencies, assuming that energy companies are homogeneous. In reality, firms are heterogeneous in the scale, cost and efficiency of their power generation, leading to various adaptive behaviours such as differentiated investments in CO2 reductions and offsets. This has resulted in misjudgments about climate tipping points and unanticipated delays in phasing out coal-fired technology. Here we develop an agent-based model using company-level technology-specific installed capacity, cost and efficiency within China’s electricity sector. We estimate renewable energy expansion and carbon peaks by simulating companies’ adaptive behaviours. The results indicate that if such behaviours focused on technology stock and return-on-investment, China’s electricity sector could have reached carbon peak by 2019-2020, ahead of the national 2030 target. By analyzing adaptive investment behaviours, we pinpoint distinct profit strategies for companies with varying technology capacities. This enables tailored incentives, avoiding the fiscal inefficiencies of one-size-fits-all policies like uniform feed-in-tariffs. Our behavioural analysis further illustrates that the delayed phase-out of coal-fired technology, due to lock-in effects, could result in coal power overcapacity and hinder the operation of renewable energy generation. Policies to accelerate the phase-out of coal capacity are becoming increasingly imperative relative to incentivizing the scale-up of renewables.
ArchMap: A web-based platform for reference-based analysis of single-cell datasets
Authors: Bright Chelsea , Lotfollahi Mohammad , Theis Fabian , Skorobogat Ronald , George Xavier , Richter Simon ,   Mohammad Dehkordi1, Lücken Malte , Topalova Aleksandra
Published: September 2024

Leveraging single cell reference atlases to analyse new data has brought about a paradigm shift in single cell data science akin to the first reference genome in genomics. However methods to perform this mapping require computational expertise as well as sometimes considerable compute power, and thus may exclude the researchers from this innovation who may benefit the most from it. ArchMap, a no-code query-to-reference mapping tool, removes this barrier by providing all-in-one automated mapping, cell type annotation, and collaborative features to analyse single-cell datasets from a wide range of integrated, often published, reference atlases and allows extension of atlases with the growing Human Cell Atlas and related efforts. This paves the way for a democratisation of reference mapping capabilities.
Anti-Markovnikov hydroallylation reaction of alkenes via scandium-catalyzed allylic C‒H activation
Authors: Dong Shunxi , Wang Shiyu , Ning Lichao , Mao Tao , Zhou Yuqiao , Pu Maoping , Feng Xiaoming
Published: September 2024

Here, we described a direct anti-Markovnikov hydroallylation reaction of styrene derivatives with 1-aryl-2-alkyl alkenes and α-alkenes by rare-earth metal catalysts. This protocol provided a straightforward and atom-efficient route for the synthesis of valuable chain elongated internal alkenes (65 examples, up to 99% yield, >19:1 E/Z ratio). The reaction proceeded via an allylic Csp3‒H activation pathway initiated by site-selective deprotonation with the assistance of cationic imidazolin-2-iminato scandium alkyl species followed by alkene insertion into the resulting scandium-allyl bond. A catalytic amount of Lewis base additives, such as amine and THF showed significant effects on the reactivity and E/Z selectivity. The reaction mechanism has been elucidated by experimental studies and theoretical calculations.
A Comparative Study on the Length-Weight Relationships of Two Freshwater Fish Families, Nandidae and Channidae, from Kawadighi Haor in North-eastern Bangladesh
Authors: Hridoy MD. Abdullah Al Mamun , Shahriar Fardin , Chowdhury Shahir
Published: September 2024

Length-weight relationships (LWRs) were determined for two fish species from the Kawadighi Haor, Moulvibazar District, Bangladesh. Fish specimens were collected across the Haor region from March to July 2024 using multi-mesh gill nets (approximately 1 cm) and conical and box-shaped traps. Additional specimens were obtained from local fish markets and small-scale fishermen in the Haor region. Statistical analysis was done by linear regression model and confidence interval using rstudio 4.3.2. The relationships between length and weight were found to fit well, with R² values of 0.931 for Nandus nandus and 0.708 for Channa punctatus. The b values of the LWR equations ranged from 2.976 for N. nandus to 3.231 for C. punctatus.
Optimising Electroless Copper Plating Parameters on Insulative Substrate for Enhanced Efficiency and Quality
Authors:   School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia, Gan Yuyin , Ong Jun Du ,   School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia, Lee Swee Kah ,   Infineon Technologies (Malaysia) Sdn. Bhd., Free Trade Zone, Batu Berendam, 75350 Melaka, Malaysia, Wan Tatt Wai ,   Infineon Technologies (Kulim) Sdn. Bhd., Infineon Plant, Jalan A7, Kulim Hi-Tech, 09000 Kulim, Kedah, Malaysia, Low Siew Chun ,   School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia
Published: September 2024

The operating parameters of electroless copper plating significantly dictate the deposition rate and the quality of the metal layer deposited on the substrate surface. This study investigates the impact of pH and temperature on electroless copper plating on an insulative substrate, pioneering a departure from the conventional metal-based substrate. Varied pH levels (12, 12.5, 13) at a constant 70°C and adjusted temperatures (60°C, 70°C, 80°C) using the optimal pH were explored. Optimal conditions were found to be a pH of 12.5 and 70°C, yielding a deposition rate of 0.758 mg/hr and a surface roughness of 0.422 nm. Despite a 17.34% reduction in deposition rate compared to 60°C, 70°C offered superior surface coverage and minimised roughness. X-ray diffraction (XRD) confirmed high copper purity and minimal oxide presence at 70°C. Nanoindentation revealed peak hardness (1.173 GPa) and low elastic modulus (13.35 GPa) at this temperature, reflecting a compact copper grain structure. These findings establish an optimum parameter set for efficient electroless copper plating on a non-metal substrate, enhancing both process efficacy and reliability.
Aplicação do Teste de Anormalidades Nucleares Eritrocíticas em Organismo Modelo Submetidos à Estressores Ambientais
Authors: Miranda Alice da Silva , Soares Emily Catarine da Silva , Silva Francijara Araujo da
Published: September 2024

O objetivo da pesquisa é analisar as alterações genotóxicas em peixes, como organismo modelo, através do teste de ANE´s. Nesse estudo foram utilizados peixes da espécie Hoplosternum littorale, coletados dos igarapés da cidade de Manaus-Am, espécie popularmente conhecida como tamoatá. Para atingir os objetivos propostos e testar as hipóteses experimentais formuladas, realizou-se um estudo laboratorial em duas fases distintas: a primeira consistiu na classificação das espécies que seriam utilizadas para o estudo, na segunda fase procedeu-se ao estudo microscópico das lâminas disponibilizadas, com a finalidade de viabilizar o teste de ANE´s. Foram identificados 72 ANE’s nas células da espécie amostrada dos três igarapés, sendo distribuídos entre: Ponte do Paraíba 25/1.000 eritrócitos = 0,025% (2,5%); Presidente Dutra 13/1.000 eritrócitos = 0,013% (1,3%); Comunidade da Sharp 34/1000 eritrócitos = 0,034% (3,4%). Foi possível detectar nas análises realizadas o impacto genotóxico nas amostras submetidas em estudo, e que o ambiente juntamente com outros fatores contribui para que ocorra a mutação genética acerca do núcleo da espécie, o que nos traz conhecimento e evidências científicas necessárias pra a aplicação de medidas de prevenção e controle da exposição aos agentes tóxicos ambientais no âmbito das políticas públicas.
COMPARISON OF CUSPAL DEFLECTION & MICROLEAKAGE IN CLASS II RESTORATION WITH DIFFERENT MATERIALS: AN INVITRO STUDY
Authors: D. Desai Priti , Ghosh Sayanti , Bera Maiti Moupriya , Basu Pratyaee , Ghosh Abhijit
Published: September 2024

Aim & objective: To compare the cuspal deflection and microleakage in class II restoration with Nanocomposite,Bulkfill composite resin & new hybrid GIC cement. Materials and Methods: Freshly extracted human maxillary 1st premolar teeth were collected ((n=30).Samples were embedded 3mm beneath the CEJ in selfcure acrylic resin block.Small glass beads were fixed with X-Flow resin on the cusps as reference point.Buccopalatal width was measured with a Digital Micrometer Gauge before prepartion.Standardized Class II MOD cavities prepared on all the samples in dimensions:2mm width x 2mm axial depth x 2mm depth. Samples were divided into groups according to restoration done:GroupA: Nanocomposite(Filtek Z350 XT),Group B:Bulk fill composite(FiltekBulkfill), Group C:Hybird GIC cement.Bucco palatal width were measured after restoration and after thermal cycling(500cycle) to measure cuspal deflection then immersed in 2 % methylene blue dye for 24 hours.The samples were sectioned vertically(mesiodistally) and dye penetration were recorded under a stereomicroscope(20X) using a scoring system. Results: The mean Bucco-Palatal width of cusp decreased after restoration and after thermocycling as compared to before restoration in group A&C but in Group B increases after restoration & after thermal cyclinig.The mean dye penetration of Group-A (1.90Â±1.10) followed by Group-C (1.80Â±0.79) were higher than that of Group-B (1.60Â±0.70) but one-way analysis of variance (ANOVA) showed that there was no significant difference between them. Conclusion: Nanocomposite, bulkfill composite and GIC hybrid cement causes cuspal deflection and microleakage on the MOD cavities, though not statistically significant.
SEASONAL FLUCTUATIONS IN PHYSICO - CHEMICAL PARAMETERS OF RIVER SIND IN KASHMIR HIMALAYAS
Authors:   Department of Zoology, Bhagwant University, Ajmer, Rajasthan., Sarwar Sumiya , Shrivastava Purnima ,   Dean Research, Bhagwant University, Ajmer, Rajasthan., Farooq Mir Mohammad ,   Hydrobiology Research Laboratory, S.P College, Cluster University, Srinagar.
Published: September 2024

A study was conducted to study the seasonal fluctuation in physico-chemical parameters of river Sind in Kashmir Himalayas to determine the current status of river. Water samples were collected seasonally for a period of one year from three different stations of river situated at different altitudes and were examined following the standard methods of APHA (2004). The study revealed that pH of water varied from 7.4 to 8.9 with an average value of 7.95 Â± 0.47, depicting alkaline nature of water.Electrical conductivity varied from 238 Î¼S cmâˆ’1 to 177 Î¼S cmâˆ’1with a mean value of 206.75 Â± 18.41, depicting oligotrophic nature of water body.Total hardness varied from 75 mg/l to 133 mg/l with a mean value of 100.33 Â± 15.59, depicting hard water nature of river. DO content varied from 8 mg/l to 13 mg/l with a mean value of 10.37 Â±1.82. FCO2content varied from 3 mg/l to 17.3 mg/l with a mean value of 9.08 Â± 5.05. Total alkalinity varied from 73 mg/l to 183 mg/l with a mean value of 128.16 Â± 28.74. Chloride content varied from 11 mg/l to 31 mg/l with a mean value of 22.58 Â± 5.10, depicting organically polluted water. Nitrate content varied from 118Î¼g/l to 234Î¼g/l with a mean value of 168 Î¼g/l Â± 36.34. Total Phosphorous content varied from 43Î¼g/l to 157Î¼g/l with a mean value of 85.5 Î¼g/l Â± 31.1. The study further revealed that river Sind is under constant anthropogenic pressure, which is major responsible factor of current ecology of river.
EVALUATION DU CLIMAT PSYCHOLOGIQUE DE TRAVAIL PAR RAPPORT A LEPUISEMENT PROFESSIONNEL CHEZ LES INFIRMIERS DE LINSTITUT NATIONAL DONCOLOGIE SIDI MOHAMMED BEN ABDELLAH DE RABAT
Authors:   Maitre de Conferences en Psychologie, Faculte des Lettres et des Sciences Humaines, Universite Ibn Zohr - Agadir, Maroc., Nassife A. , Boulahya M. ,   Docteur en Psychologie du Travail, Faculte des Lettres et des Sciences Humaines, Universite Mohammed V - Rabat, Maroc.
Published: September 2024

The primary aim of this study is to evaluate the psychological work climate among the nursing staff at the National Institute of Oncology Sidi Mohammed Ben Abdellah in Rabat, as well as explore the relationship between the components of the psychological work climate and burnout. Additionally, we aim to focus on identifying the role of nurses perception of the organizational work climate in explaining, interpreting, and predicting their burnout levels. This research involved a sample of 70 nursing staff members, consisting of 47% male respondents (33 nurses) and 53% female respondents (37 nurses). The average age of this sample is 38.78 years (SD = 9.63). Meanwhile, the average professional experience is 13.3 years (SD = 12.5). The findings of this study reveal that 63.72% of the nursing staff at the National Institute of Oncology perceive the work climate negatively, while 70% of the total sample exhibits a high level of burnout. This study also revealed that intervening to positively influence the perception of the psychological work climate by 63.72% would reduce the occurrence and persistence of burnout syndrome among the nursing staff from 70% to 39.76%.
PROPOSTA DE SÍNTESE ONE-POT: PRÁTICAS EXPERIMENTAIS DE QUÍMICA ORGÂNICA E MEDICINAL A PARTIR DA PREPARAÇÃO DO HETEROCICLO TIAZOL
Authors: de Assis Gonsalves Arlan , Laysna dos Anjos Santos Victória , Silva Simplicio Sidney , Galvão Guimarães Délis , Melo Araújo Cleônia Roberta
Published: September 2024

ONE-POT SYNTHESIS PROPOSAL: EXPERIMENTAL PRACTICES IN ORGANIC AND MEDICINAL CHEMISTRY USING THE PREPARATION OF THE THIAZOLE HETEROCYCLE AS AN EXAMPLE. In this work we explore some theoretical and practical aspects of one-pot synthesis. The focal point of the study is the preparation of the thiazole heterocycle, with an emphasis on theoretical aspects of the organic and medicinal chemistry of this important privileged structure. The entire set of experimental procedures and characterization steps explored in this work has the potential to assist in the training and/or technical improvement of undergraduate students, and contribute to the teaching of chemistry in Brazilian higher education. It is worth emphasizing these aspects because the experiments shown in the proposed practices involve simple, rapid, low-risk, and low-cost procedures, making it perfectly feasible to reproduce them in undergraduate classes, even in laboratories with limited material resources.
Analysis of the force and power characteristics of a twin crank-type mechanism of an enhanced vibration exciter
Authors: Korendiy Vitaliy , Predko Rostyslav , Danylo Yaroslav , Yaniv Oleksandr
Published: September 2024

The crank-type vibration exciters represent innovative and promising actuators for a variety of vibratory technological equipment. Extensive research has demonstrated their potential for generating specific trajectories of the working components of various technological machines. This study builds upon previous investigations of the authors, focusing on the kinematics and dynamics of crank-type vibration exciters, with a specific emphasis on analyzing the forces, moments, and torques acting on the elements of the twin crank-type actuating mechanism. The research methodology involves the development of a simplified dynamic diagram of the mechanism and derivation of the analytical expressions to describe its force parameters. Mathematical modeling and computer simulation are then conducted to analyze the forces, moments, and torques experienced by the mechanism during its motion under different operational conditions and design parameters. The results obtained provide time-dependent profiles of these parameters across various conditions and design configurations of the twin crank-type mechanism. A key scientific contribution of this paper consists in the development of the theoretical basis for creating novel techniques of dynamic and strength analysis and optimization of design and operational parameters of enhanced vibration exciters equipped with twin crank-type mechanisms. The research findings offer valuable insights for engineers involved in the development and enhancement of vibratory technological machines equipped with crank-type vibration exciters.
Experimental and performance analysis of carbon/carbon bolt
Authors: Zhou Jingyi , Shi Jiale
Published: September 2024

In this paper, the mechanical properties of C/C composite bolts at normal temperature are studied. The strength performance of bolts under different load conditions of tension and shear is tested, which shows that they have different failure modes. It is concluded that the strength performance and failure mode of C/C bolts are directly related to the structural size and the braiding characteristic of the bolt. This can provide a basis for the optimal design of C/C bolts.
Study on vibration isolation design using elastomeric pads and its application
Authors: Xia Wei
Published: September 2024

The vibration mechanism of railways and urban rail transit is highly intricate, particularly within the railway environment. This study employs a variety of vertical stiffness damping pads to develop an integrated damping system for a floating slab. Through optimization of damper stiffness and arrangement, the modal characteristics of the floating slab are analyzed, resulting in a reduction of the inherent frequency of the track structure and attenuation of vibration transmission. Subsequently, this damping system is implemented in an actual engineering project to assess its effectiveness. The findings indicate that lower stiffness in the vibration isolation pad corresponds to a smaller inherent frequency for the floating slab, thereby enhancing its damping efficacy. Utilizing elastic supports for vibration isolation pads within the track structure can mitigate upper structure vibrations induced by trains.
Dynamic performance of compound vibration damping device for sport fitness equipment
Authors: Liu Jinkun , Sun Yu , Li Qianru
Published: September 2024

Composite vibration damping is a crucial aspect in enhancing the performance of shock absorber, with potential for significant application in multi-degree-of-freedom sports facilities. Based on the finite element method, the modal analysis, harmonic response analysis and stiffness analysis of metal rubber shock absorber were realized, and the parameters of natural frequency, acceleration transmissibility and average stiffness were verified. Through ABAQUS, the finite element model of shock absorber was established and reasonably simplified, and the influence of wire diameter and relative density on the comprehensive performance was studied under the condition of prestress modal analysis. The results indicate that the shock absorber with a relative density of 0.35 exhibits higher average stiffness, but lower energy dissipation coefficient. Additionally, it shows larger peak values for natural frequency and acceleration transmissibility, but reduced damping. The simulation findings are in line with the experimental results, demonstrating the accurate acquisition of nonlinear mechanics and dynamic response properties of metal rubber shock absorber.
Noise control of audio recognition equipment for multimedia system
Authors: Li Qianru , Liu Jinkun , Sun Yu
Published: September 2024

Noise control is one of the most critical technical indicators to improve the performance of intelligent audio recognition system. Based on the noise cancellation technology, a distributed low noise amplification circuit design was proposed, and the PE15-0P technology was applied to realize broadband low noise amplification. The amplifier circuit used diodes and resistors for voltage division, which effectively achieved bias saturation at the transistor and then diode structure. According to the design of low noise amplifier, the noise output characteristics were simulated and analyzed. An audio enhancement method based on noise type recognition was proposed, which can optimize noise estimation by selecting parameter combinations according to noise type, so as to improve the quality and intelligibility of noise frequency signals in various noise environments. From the aspects of hardware and algorithm design, the noise signal was comprehensively reduced, and the accuracy of audio recognition was significantly improved.
Modeling of unsteady-state creep of asphalt concrete
Authors: Iskakbayev Alibay , Teltayev Bagdat , Aitbayev Yerbol , Zhaisanbayev Azamat
Published: September 2024

The article experimentally investigated unsteady-state creep of a hot fine-grained dense asphalt concrete under uniaxial tension at temperatures of 22-24 °C. 61 samples of the asphalt concrete in the form of a rectangular beam with dimensions of 50×50×150 mm were tested to complete failure at seven different stresses (from 0.084 MPa to 0.3053 MPa) in a special installation with a heat chamber. Based on the test results, unsteady-state creep curves were constructed, which were normalized and approximated with high accuracy by a power function. Reliable dependences of the limiting time of hardening, the limiting strain of hardening, and the hardening rate on stress have been established.
Self-synchronisation of vibration exciters of a biharmonic vibration drive
Authors: Yaroshevich Nikolay , Puts Vitalii , Yaroshevych Tetyana , Martyniuk Viktor
Published: September 2024

The paper considers the practical possibility of self-synchronisation of two biharmonic unbalanced vibration exciters mounted on a solid body with plane oscillations. The problem is solved by the method of direct separation of motions. The equations for slow processes of establishing synchronous modes of rotation of the exciters are obtained; expressions for vibration torque; the vibration coupling coefficient and the condition for the existence of an synphase mode of motion. It is shown that the latter condition is relatively “soft”. An expression for the vibration torque is obtained for the case of “stuck” velocity of a biharmonic exciter in the resonance zone of a vibration machine. Recommendations for selecting the parameters of the vibration drive are given. The analytical conclusions are confirmed by computer modelling.
Constructing the schematic and mathematical model of the dynamics of a vibratory drum separator
Authors: Rebot Dariia , Topilnytskyy Volodymyr , Svidrak Inga , Stotsko Rostyslav , Shevchuk Anzhela
Published: September 2024

A structural diagram of a vibratory drum separator has been developed, and based on it, a mathematical model of the separator’s oscillatory motion has been constructed. The mathematical model was built using nonlinear mechanics methods and Lagrange equations. The obtained dependencies allow for determining the influence of geometric and physico-mechanical parameters on various factors affecting the intensity of the separation process. The research results should be used both at the design stages of vibratory separators and when selecting their parameters and operational modes.
Mathematical modeling of the possibility of creating interresonance discrete-continuous vibration technological equipment without a spring
Authors: Lanets Oleksii , Derevenko Iryna
Published: September 2024

In the article is implemented interresonance mechanical oscillating system vibrational technological equipment, which provides using two continuous of connected area successively to working body vibrational machines. Disturbance of the structure is carried out by applying a variable-sign power supply voltage to the reactive continuous section, where in interaction with the magnetic field from the permanent magnets, a variable-sign disturbance force occurs. Inertial forces from the reactive continuous section are transferred to the intermediate continuous section, which resonates with the working body. In fact, an interresonance discrete-continuous oscillating system is obtained in which there are no springs. The function of springs is performed by bodies with distributed parameters that have elastic properties. Based on the Krylov-Duncan functions, a system of equations was formed that establishes the amplitude of oscillations of the working body. The amplitude-frequency characteristic of the discrete-continuous system was studied, which confirms the possibility of creating interresonance oscillating systems of vibrating technological equipment without springs.
Bending of a piecewise homogeneous plate with a circular interfacial materials separation zone and radial crack considering the strip contact of its edges
Authors: Slobodian Mykola , Zvizlo Ivan , Bilash Oksana , Sorokatyi Mykola , Petruchenko Oksana , Markevych Lukiian
Published: September 2024

The work presents a solution to the bending problem of an infinite piecewise homogeneous isotropic plate with an elastic circular washer and a radial through straight crack. It was assumed that under the action of an external loads at infinity, the edges of the crack are smoothly contacted on area of constant width (strip contact) on the upper base of the plate. The solution of the problem is built using the methods of the theory of functions of a complex variable and complex potentials and is reduced to a system of singular integral equations, which is numerically solved using the method of mechanical quadrature A numerical analysis of the problem is conducted and graphic dependencies of contact force, coefficients of intensity of moments and forces at various parameters of the problem were constructed.
Identifying ordinal categories for the Water Insecurity Experiences Scales
Authors: Frongillo Edward A. , Bethancourt Hilary J. , Miller Joshua D. , Young Sera L. ,   the Household Water Insecurity Experiences Scales (HWISE)-Research Coordination Network (RCN)
Published: September 2024

The Household Water Insecurity Experiences (HWISE) and Individual Water Insecurity Experiences (IWISE) Scales are globally suitable tools for comparably measuring water insecurity experiences among households and adults, respectively. The potential range for HWISE and IWISE scores is 0–36. When the WISE Scales were first published, scores of 12 and higher were considered indicative of water insecurity, but additional cut-points are needed to provide more nuanced insights. We therefore sought to develop a practical set of cut-points for the WISE Scales using HWISE data from 13 sites across 12 countries (n = 3,293) and nationally representative samples of IWISE data from 38 countries collected by the Gallup World Poll (n = 52,343). We selected cut-points in water insecurity scores to establish four ordinal categories: no-to-marginal (0–2), low (3–11), moderate (12–23), and high (24–36) water insecurity. These categories were monotonically associated with increasing odds of reporting water dissatisfaction and helped to differentiate the breadth of water insecurity across populations with heterogenous water insecurity experiences and frequencies. These four water insecurity categories can be used to better understand how water insecurity may be related to livelihoods, health, and well-being, both at low and high water insecurity.
Advancement in Glucose Biosensors and Current Development of Electrochemical Sensing
Authors: Pramanik Rajib , Ikbal Mohammed , Mishra Nimai , Parvin Shabnam , Hoque Rabiul
Published: September 2024

Since the introduction of the first enzyme electrode in 1962, the area of glucose
biosensing has undergone substantial expansion and advancement. The ongoing development
of sensing platforms has been achieved by extensive study on different immobilization
methods and improvements in electron transfer efficiency between enzymes and
electrodes. The advancement of nanostructures and their composites has further accelerated
this process. Some noteworthy examples include carbon nanotubes, graphene/graphene
oxide, and metal oxides. Nanomaterials are used in biosensors to optimize the immobilization
process and enhance the electrocatalytic activity of glucose. This article provides a
concise overview of the development of glucose biosensors, emphasizing several iterations
and recent patterns in utilizing nanostructures for glucose detection, with or without
using enzymes. A complete overview was created by collecting, evaluating, analyzing,
and reviewing the most recent literature on electrochemical glucose biosensors, including
enzymatic and non-enzymatic approaches. The paper comprehensively analyzes the evolution
from the 1st to the 4th generation, focusing on the prospects for the most recent generation
of glucose biosensors. In addition, this article examines the many mechanisms of
glucose sensors using complex materials and methods for glucose detection technology.
We specifically aim to comprehend the mechanisms revealed by different electrochemical
techniques that enhance glucose oxidation and its interaction with the electrode. To
heighten our comprehension of glucose oxidation, we examine the historical background
of these biosensors, progress made in improving electron transfer, the creation of several
sensing platforms that utilize nanomaterials, and their resulting performance.