bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative Study of Mechanical Properties of PPC Mortar and Geopolymer Mortar with NaOH Activator in Seawater Soaking
Authors: Priastiwi Yulita Arni , Hidayat Arif , Husna Khotimatul , Putriagsari Farah Naurah
Published: December 2023

Using Portland pozzolan cement (PPC) is considered suitable for infrastructure in the sea area because it has a high resistance to salt and sulfate but still produces carbon dioxide gas emissions that can damage the environment. Environmentally friendly materials that can completely replace cement are geopolymer materials. This study compared the mechanical properties of PPC mortar and geopolymer mortar with and without white soil under seawater bath conditions. The test object is a 5x5x5 cm mortar cube with fly ash, white soil, sand, water, alkaline activator NaOH 8M, and PPC cement. Mortar variations include PPC mortar, geopolymer mortar without white soil substitution (TTP), and 15% white soil substitution mortar (TP15%). Tests include compressive strength, tensile strength, porosity, density, and absorption for all three variations. Microstructure testing of the influence of the bath is carried out on the TP15% mortar. The test results showed that PPC mortar has better resistance compared to both variations of geopolymer mortar in terms of its compressive and tensile strength at a bath life of 28 days, namely 32,427 MPa and 2,318 MPa, while the geopolymer mortar produced maximum compressive and tensile strength values of 14,373 MPa and 0.993 MPa. TTP mortar has better resistance than TP15% mortar. Microstructure testing showed mortar with baths had a denser matrix.
Modeling of Transportation Mode Selection (Study Case: Faculty of Economics and Business, State University of Malang)
Authors: Rahardjo Boedi , Yulianti Monica , Pranoto Pranoto
Published: December 2023

A traveler will consider many things in choosing a mode because the availability of transportation modes is variated. The traveler's characteristics, the trip's characteristics, and the facilities of transportation mode characteristics can influence a person's decision in choosing a mode. The study of the selection of modes of transportation to campus by students, lecturers, and other workers at the Faculty of Economics and Business, State University of Malang, aims to describe the characteristics of mode users and determine the mode selection models to go to campus. This study used a descriptive analysis method to determine the characteristics of mode users and the binomial difference logit method for modeling transportation. The results of the study showed that five factors are most influential in choosing a mode between private transportation and public transportation at the Faculty of Economics and Business, the State University of Malang, namely ownership of a driving license, travel distance, the comfort of transportation, the safety of transportation, and availability of transportation which produces a regression model UKP – KU = -11.480 + 4.045 (X7) – 1.263 (X8) + 5.102 (X11) + 2.302 (X12) + 5.693 (X14). This model has an R2 value of 0.743 and a classification plot of 0.927. From the results of the modeling equation, the probability value of mode selection for private transportation is 0.997. In contrast, public transportation gets a probability value of 0.003.
Analyzing the structure of bamboo culms using computer vision and mechanical simulation
Authors: Dai Fukuan , Chen Yuxuan , Zhang Wenfu , Zhong Tuhua , Tian Genlin , Wang Hankun
Published: December 2023

Bamboo culm is a natural material characterized by a graded structure of vascular bundles in the radial direction and a regular distribution of bamboo nodes in the axial direction. To investigate the adaptation of bamboo culm structure to its natural environment, the bamboo culm structure was analyzed using a vascular bundle identification model, complemented by mechanical simulations. The results showed a certain pattern in the macroscopic dimensional characteristics of bamboo from the base to the top: the outer diameter decreased linearly; the internode length initially increased before decreasing; the length-to-diameter ratio gradually increased; and the wall-to-cavity ratio initially decreased before increasing. In response to external forces, bamboo exhibited strong stability, which was attributed to the thin and hollow wall as well as parabolic distribution of bamboo nodes. Along the axial direction, vascular bundle numbers linearly decreased, while the ratio of fiber sheath tissue and the distribution frequency of vascular bundles increased from the base to the top. In the radial direction, the length and area of vascular bundles tended to increase before decreasing, while the width tended to increase, leading to a decreasing length-to-width ratio. Overall, the radial variation pattern of vascular bundles showed nonsignificant variations at different heights.
Effect of graphene additive on microstructure and properties of MAO coatings on 6063 aluminum alloy
Authors: Gao Hong , Wang Chao , Jiang Bo , Song Renguo
Published: December 2023

The micro-arc oxidation process is used to improve the properties of 6063 aluminum alloy by forming coatings on the surface of the alloy, in order to further enhance the features of the basic micro-arc oxidation coatings, graphene was added into the silicate alkaline electrolyte. The addition of the graphene influences the surface morphologies, thickness, element distributions, phase compositions, wear resistance and corrosion resistance of the formed coatings. They were studied by means of scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, friction and wear testing and an electrochemical workstation. The results show that the microstructure and properties of the coating were modified with the increase of graphene concentration. However, when too much graphene was added, the performance of the coating became worse.
Synthesis and crystal structure of bis{2-(tert-butyl)-6-((E)-((4-((E)-1-(methoxyimino) ethyl)phenyl)imino)methyl)phenolato-κ
2
N,O}cobalt(II), C40H46CoN4O4
Authors: Zhao Ji-Xing , Chen Da-Qun , Wu Lei-Fang
Published: December 2023

C40H46CoN4O4, monoclinic, P21/n (no. 14), a = 12.0084(5) Å, b = 28.1263(10) Å, c = 12.0351(5) Å, β = 110.800(1)°, V = 3800.0(3) Å3, Z = 4, R

gt
(F) = 0.0575, wR

ref
(F
2) = 0.1150, T = 173(2) K.
Crystal structure of (Z)-3-(4-methoxyphenyl)-4-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)-N-phenylthiazol-2(3H)-imine, C25H21N5OS
Authors: Abdel-Wahab Bakr F. , Alanazi Saud A. , Yousif Emad , Kariuki Benson M. , El-Hiti Gamal A.
Published: December 2023

C25H21N5OS, monoclinic, P21/n (no. 14), a = 12.9303(5) Å, b = 9.1111(4) Å, c = 18.7111(8) Å, β = 97.879(4)°, V = 2183.53(16) Å3, Z = 4, R

gt
(F) = 0.0487, wR

ref
(F
2) = 0.1327, T = 293(2) K.
Beyond the outdoors: indoor air quality guidelines and standards – challenges, inequalities, and the path forward
Authors: Siddique Azhar , Al-Shamlan Maryam Y. M. , Al-Romaihi Hamad E. , Khwaja Haider A.
Published: December 2023

In the last few decades, indoor air quality (IAQ) has become a major threat to public health. It is the fifth leading cause of premature death globally. It has been estimated that people spend ∼90 % of their time in an indoor environment. Consequently, IAQ has significant health effects. Although IAQ-related standards and guidelines, policies, and monitoring plans have been developed in a few countries, there remain several global inequalities and challenges. This review paper aims to comprehensively synthesize the current status of widely accepted IAQ guidelines and standards. It analyzes their global implementation and effectiveness to offer insights into challenges and disparities in IAQ policies and practices. However, the complexity of domestic environments and the diversity of international standards impede effective implementation. This manuscript evaluates international, national, and regional IAQ guidelines, emphasizing similarities and differences. In addition, it highlights knowledge gaps and challenges, urging the international scientific community, policymakers, and stakeholders to collaborate to advance IAQ standards and guidelines. The analysis evaluates the efficacy of guidelines, identifies deficiencies, and offers recommendations for the future of domestic air quality standards.
Comparative vascular effects of levetiracetam and valproate with hyperhomocysteinemia in rat models
Authors: Gökdemir Selim , Todurga Seven Zeynep Gizem , Shahzadi Andleeb , Neşetoğlu Neşet , Ünal Durişehvar , Akkan Gökhan , Özyazgan Sibel
Published: December 2023

Objectives

Hyperhomocysteinemia (HHcy) a significant risk factor for vascular disease, often emerges in epilepsy with the use of antiepileptic drugs. In this relationship, our study investigates the combined effects of HHcy and antiepileptics on vascular function using a rat model.

Methods

Fourty two rats were included and divided into six groups as, 1-Control, 2-L-Met, 3-LEV injected, 4-LEV-injected + L-Met, 5-VAL-injected, 6-VAL injected + L-Met. L-Methionine (L-Met) was added to drinking water of rats for 1 month to develop HHcy. Simultaneously, intraperitoneal (ip) injections of sodium valproate (VAL) and levetiracetam (LEV) were administered. Effects were comparatively investigated, and noradrenaline (NA), followed by acetylcholine (ACh) and glyceryl trinitrate (GTN) were applied in organ bath system. Agonist doses were expressed as ten base logarithm (M) through 10−9, 10−8, 10−7, 10−6, 10−5, 10−4 mol/L in dose-response graph.

Results

NA contractions between LEV and LEV + L-Met groups showed statistical significance (LEV Emax=288.50 ± 46.54, LEV + L-Met Emax=480.40 ± 78.83) (p<0.05) however, no significance was observed among the other groups. ACh relaxations between Control-L-Met (Control Inhmax=12.65 ± 2.09, L-Met Inhmax=50.05 ± 7.43) (p<0.05), and Control-Val + L-Met (Control Emax=328.20 ± 52.83, VAL + L-Met Emax=452.60 ± 71.53) (p<0.01), groups showed statistical significance. Between other groups, no significance was observed. In GTN relaxations, no statistical significance was observed.

Conclusions

This study highlights the adverse impact of HHcy on aortic relaxation. Further impairment was observed with VAL compared to other treatment and control groups. These findings underscore the importance of considering vascular side effects when selecting antiepileptic drugs. Ultimately, our study contributes valuable insights that may aid the choice of appropriate treatment strategies to mitigate potential vascular complications of HHcy.
Dynamic Foraging Behavior Performance Is Not Affected byScn2aHaploinsufficiency
Authors: Schamiloglu Selin , Wu Hao , Zhou Mingkang , Kwan Alex C. , Bender Kevin J.
Published: December 2023

Dysfunction in the geneSCN2A, which encodes the voltage-gated sodium channel Nav1.2, is strongly associated with neurodevelopmental disorders including autism spectrum disorder and intellectual disability (ASD/ID). This dysfunction typically manifests in these disorders as a haploinsufficiency, where loss of one copy of a gene cannot be compensated for by the other allele.Scn2ahaploinsufficiency affects a range of cells and circuits across the brain, including associative neocortical circuits that are important for cognitive flexibility and decision-making behaviors. Here, we tested whetherScn2ahaploinsufficiency has any effect on a dynamic foraging task that engages such circuits.Scn2a+/−mice and wild-type (WT) littermates were trained on a choice behavior where the probability of reward between two options varied dynamically across trials and where the location of the high reward underwent uncued reversals. Despite impairments inScn2a-related neuronal excitability, we found that both male and femaleScn2a+/−mice performed these tasks as well as wild-type littermates, with no behavioral difference across genotypes in learning or performance parameters. Varying the number of trials between reversals or probabilities of receiving reward did not result in an observable behavioral difference, either. These data suggest that, despite heterozygous loss ofScn2a, mice can perform relatively complex foraging tasks that make use of higher-order neuronal circuits.
Indices Of Heart Rate Variability Are Not Associated With Obesity In Patients 30-60 Years Of Age Without Chronic Noncommunicable Diseases
Authors: Olga N. Dzhioeva , Rogozhkina Elizaveta A. , Shvartz Vladimir A. , Shvartz Elena N. , Kiselev Anton R. , Drapkina Oxana M.
Published: December 2023

Objective –– to compare heart rate variability (HRV) in patients aged 30-60 years without chronic noncommunicable diseases (CNCDs) with and without obesity. Methods –– The groups of obese (n=43) and nonobese (n=28) patients without CNCDs ranged 30 through 60 years of age. We assessed the conventional HRV indices according to the clinical guidelines, as well as the synchronization index (S) for low-frequency (LF) oscillations evaluated from HRV and photoplethysmogram (PPG). Results –– No statistically significant differences in HRV indices and S index were detected between the study groups. Conclusion –– HRV indices and synchronization of LF oscillations detected from HRV and PPG were not significantly associated with obesity in patients aged 30-60 years without CNCDs.
Critical Endpoints In Dynamic Follow-Up Of Anemia Patients With Percutaneous Coronary Intervention For Acute Coronary Syndrome
Authors: Simonyan Margarita A. , Posnenkova Olga M. , Zheleznyakova Natalia A. , Puchiniyan Nikita F. , Kalyuta Tatyana Yu. , Gridnev Vladimir I.
Published: December 2023

Introduction — Identifying critical endpoints during long-term follow-up of patients with coronary artery disease (CAD) and anemia after percutaneous coronary intervention (PCI) would allow optimizing management tactics for this group of patients. Objective — To investigate the risks of developing adverse cardiovascular complications in patients with anemia who underwent revascularization for acute coronary syndrome (ACS) and to assess the most significant factors affecting outcomes. Material and Methods — The study included 298 patients with CAD who had undergone PCI at least two years before enrollment. A survey of patients and a retrospective analysis of their medical records were conducted. The outcome was a composite endpoint (death, myocardial infarction, stroke, transient ischemic attack). Kaplan-Meier curves were constructed to assess the effect of anemia on outcomes. To identify predictors of an adverse outcome, a Cox regression model was built. Results — In the group of patients with ACS who underwent PCI, the incidence of anemia was 8.4%. The incidence of the composite endpoint in patients with anemia was 51.6%, which was significantly different from its value in patients without anemia after 400 days of follow-up (logrank test, p<0.008). After day 1,200, both groups exhibited similar dynamics of adverse outcomes. The following factors were statistically significantly linked to the risk of death within 24 months after PCI: left ventricular ejection fraction (p=0.002), anemia (p=0.009), and chronic kidney disease (p=0.02). Conclusion — We demonstrated that anemia influenced the development of adverse outcomes from day 400 to day 1,200 of a follow-up. Some factors, such as left ventricular ejection fraction and the presence of chronic kidney disease, also had a high predictive power for adverse events.
Influence of Stress Resistance on Myocardial Expression of the Pro-Autophagic Protein Beclin-1 After Cardiac Contusion in Experimental Setting
Authors: Klyuchnikova E. I. , Korpacheva O. V. , Mozgovoy S. I. , Zolotov A. N. , Kononov A. V.
Published: December 2023

Objective. Evaluation of myocardial expression of the pro-autophagic protein Beclin-1 after cardiac contusion in experimental animals with diﬀerent stress resistance.

Materials and methods. The study included 68 white mongrel male rats weighing 250–300 g. After ranking for extreme variants of stress resistance, moderately stress-resistant rats (N=36) were excluded from the study. The remaining animals were split into the control (N=16) and study (N=16) groups, each group composed of 8 high stress resistant and 8 low stress resistant rats. In the study group, 24 hours after inﬂicted cardiac contusion, 5×5 mm myocardial tissue specimens were sampled from the intraventricular septum, anterior walls of the left and right ventricles, histological sections were made, and a reaction with primary polyclonal Anti-Beclin-1 antibodies was performed. Beclin-1 expression was evaluated under the microscope.

Results. Immunohistochemical evaluation revealed a statistically signiﬁcant increase in Beclin-1 protein expression (P=0.0002) in the cytoplasm of cardiomyocytes in the study group vs the control group, regardless of animals’ baseline stress resistance. However, expression of Beclin-1 protein in the myocardium of highly stress-resistant rats (Me=4.3; LQ=4.0; HQ=4.3) was signiﬁcantly higher versus low-resistant animals (Me=3.6; LQ=3.3; HQ=3.6) (P=0.0009).

Conclusion. Increased expression of Beclin-1 protein in the post-traumatic period of experimental cardiac contusion indicates autophagic ﬂux activation. Intensity of autophagy varied depending on the animal’s stress resistance.
Determinants of Short- and Long-Term Commercial Lending Rates in Peru, 2010–2022
Authors: Bravo Orellana Sergio
Published: December 2023

Short- and long-term interest rates are crucial for investment and, thus, business dynamism. The injection of money depends on the ability to promote cash flows through credit which boosts productive sectors. In the last decade, among Latin American countries, Peru has stood out for its key financial system and macroeconomic stability characteristics. The Central Reserve Bank of Peru (BCRP) plays a key role in setting the reference rate given its autonomy and strong institutional trust. However, the mixed pension system injects liquidity into the financial system through its private contributions. For the purposes of this study, an autoregressive econometric model of distributed lags (ARDL) was employed. The findings reveal that the reference rate set by the BCRP establishes a long-term relationship for both short and long-term rates, empirically demonstrating the effectiveness of monetary policy. Additionally, the liquidity provided by the pension system triggers an immediate shock response in determining the short-term rate. It is also observed that the issuance of sovereign bonds is a robust tool in determining the long-term rate due to its facilitation of credit access. This research is relevant for identifying macroeconomic and financial variables and guiding the formulation of macroeconomic policies.
Does Insurance Sector Matter for Economic Complexity?
Authors: Ajide Folorunsho M. , Osinubi Tolulope T. , Ojeyinka Titus  A.
Published: December 2023

The study examines the impact of the insurance market on economic complexity in 28 OECD nations within a period of 1995–2020. The study also examines whether the impact of life insurance on economic complexity would be different from that of the non-life insurance sector within the insurance market. The results based on pooled mean group (PMG) estimators reveal that the insurance sector influences economic complexity positively. This finding is further substantiated after employing panel co-integrating regression and method of moment quantile regression (MM-QR). The study concludes that the insurance sector is a key instrument in upgrading the economic complexity of an economy. Since the distributional impact of economic complexity also depends on economic and financial risk, the insurance sector can assist in mitigating the risks and uphold the productive knowledge structure needed to enhance national product sophistication.
Corporate Social Responsibility Activities in Arts: Focusing on Performing Production Firms in South Korea
Authors: Kang HanYi , Shin Hyung-Deok , Park Jihyon
Published: December 2023

The purpose of this study was to investigate CSR activities in the field of arts and culture in South Korea. This study focused on government-driven CSR activities in performing arts production companies. The study collected 425 theater performance data samples from the 2015 Daehak-ro Culture Map Directory published by the Seoul Theater Center to examine which characteristics of performing arts production companies influence participation in the Nanum Ticket Program. Logistic regression analyses were performed with this data to test the hypotheses. After controlling several conditions, we found that the size of the production firm and the genre of the performance had significant effects on donation activities. In this study, the field of CSR empirical research in arts and cultural management was expanded by considering performing arts production companies as subjects of social contribution activities. This study also presents policy implications for expanding CSR activities in the field of arts and culture.
Long-Term Asymmetric Impact of VAT on Domestic Investment in Nigeria
Authors: Abu Nurudeen , Izuagie Blessing , Ben-Obi Onyewuchi Amaechi
Published: December 2023

We employ a non-linear ARDL (NARDL) technique to explore long-term asymmetric influence of value added tax (VAT) on domestic investment using quarterly data for Nigeria from 1994 to 2021. A long-term relation was found between domestic investment and VAT (alongside lending and inflation rates, credit to private sector, exchange rate, openness and households’ consumption expenditure) based on the bounds test to cointegration. We uncovered a long-term asymmetric association between domestic investment and VAT. The results show that a positive shock (an increase) in VAT has a long-term decrease and significant influence on domestic investment, while a negative shock (a decrease) in VAT has an insignificant positive influence on investment during the long-term. Other significant long-term drivers of domestic investment are credit to private sector, inflation and lending rates, openness, exchange rate and households’ consumption expenditure. Some recommendations have been offered based on the empirical outcomes.
The role of nursing in a day center for patients with Alzheimer
Authors: De Libera Márcia Mello Costa , Abi Rached Chennyfer Dobbins , dos Santos Gustavo Alves Andrade , Orfale Adriana Garcia , Hayashi Xavier Angela Mitzi , Japiassu Renato Barbosa , Cordeiro dos Santo Gabriel Augusto , da Silva Maria Selma
Published: December 2023

Introduction: This article addresses the complex composition of the diagnosis of probable dementia caused by Alzheimer's disease, as well as the course of action necessary to access the subjects. Objective: to analyze the trajectory of the disease and/or care through re-reading reference materials for the pathology, considering the trajectory of the disease and care. Methodology: The literature review focused on the phenomenon of dementia and the care of elderly patients with Alzheimer's, their caregivers, and family members. The research supports the writing that was carried out through observations and experiences with the elderly and families who attend the institution Day Center for the Elderly (DCE). This institution receives elderly people with this diagnosis and offers day care through an individual plan related to personal care, medications, food, and therapeutic and memory activities aimed at elderly patients with Alzheimer's. Results and discussion: Next, the care itineraries adopted by the families with the mediation of the CDI, inserted in a broad and unequal context to gender in Brazil, were analyzed. From there, we start with the descriptions and interpretations of the so-called "perceptual dilemmas", faced by those with dementia, both in terms of memory and reasoning disorientations and in terms of everyday skills with their own body. Conclusion: After defining the particularities of subjects with dementia, an analysis of the inter-subjective relationships of care has been proposed, perpetrated in the constant exercise of the caregiver in establishing perceptual alterities to understand the demands of the other to meet them.
The impact of tooth loss and the role of implantology in the elderly population
Authors: Santos Gabriel Mulinari
Published: December 2023

Tooth loss can lead to changes in the mouth and various health complications in older adults. In addition to affecting oral health, the loss of teeth can impact speech, chewing, and overall quality of life. Dental implants have been proposed as one possible solution for missing teeth. This article aims to discuss the potential negative effects of tooth loss in the elderly population and emphasize the important role of implantology in addressing these challenges. The field of implantology extends beyond just replacing a single tooth and involves ongoing research to meet the unique needs of older adults. Ultimately, the goal of implantology is to ensure both oral and overall health, as well as the long-term success of dental implants.
What is Religious Studies?
Authors: Milani Milad
Published: December 2023

This address was given in-person at the 2023 annual conference of the Australian Association for the Study of Religion, hosted by the Institute for Ethics and Society at the University of Notre Dame, Sydney. The purpose of the address was to raise the question about the fundamental aspects of our thinking about religion, and via this process of inquiry to underline the importance of our relationship to words, ideas, and their meaning. So as not to take for granted our existing relationship to the language we use, but to recognise that we are always and already in such a relationship. Thinking about religion, therefore, becomes not only the process but the nature of our being in relation to what we understand about religion. The talk drew upon my reflection on the philosophy of Martin Heidegger, the mysticism of Meister Eckhart, and Zen Buddhism—the cross section of which was made particularly significant for me in reading Caputo’s The Mystical Element in Heidegger’s Thought. All of this, however, is underpinned by the methodological remarks made by Trompf about religious studies in In Search of Origins; something that has stayed with me since my time studying at the Department of Studies in Religion at the University of Sydney.
Psychological and pedagogical problems of using chatGPT in solving physical problems
Authors: Shamshin Alexandr
Published: December 2023

All innovative ways of learning are aimed at enabling the average student to learn to think like an expert, to use his/her knowledge like an expert. Traditional physical education, like all-natural sciences, involves the transfer of information to students in lectures, and its consolidation in practical and laboratory classes and in the form of independent homework. At the same time, several aspects of learning are distinguished: conceptual understanding, direct transfer of information, knowledge and basic physical laws. A general drawback of traditional concepts is the low digestibility of the material, which is related to the psychological characteristics of a person: 10% are able to formulate the main ideas of the material that was taught 15 minutes after the explanation, if it is new material for them. All modern educational technologies using interactive methods and various pedagogical methods are aimed at changing the student's psychology and are called upon in various ways and trajectories to reach the sixth level in Bloom's taxonomy - the level of creativity, expert, specialist.
The ability to solve problems in physics is an important element in the system of physical education, because it allows you to achieve a number of goals: students see the practical application of the acquired theoretical knowledge, which makes the learning process more conscious and changes the attitude to learning; contributes to the development of logical thinking, concretization of knowledge, which connects the theoretical lecture material with its practical application. In the process of solving physics problems, a number of personal abilities develop: mental, creative, logical, intelligence, observation, independence and accuracy.
The integration of artificial intelligence (AI) generative models GPT in solving physical problems has attracted considerable attention this year. This article examines the complex interaction between AI and student decision-making, shedding light on the cognitive and emotional factors that must be considered when using AI to solve physical tasks. In addition, the pedagogical implications of incorporating AI into physics education are explored, emphasizing the importance of maintaining a balanced approach that promotes the development of critical thinking, creativity, and ethical reasoning. By diligently addressing these challenges, we can harness the potential of AI to expand problem-solving capabilities while preserving the undeniable value of human intelligence and expertise in scientific research
The mitigating consequences of perceived organisational support on the influence of worker morale in a distributed work landscape
Authors: Van Heerden Rentia , Naicker Visvanathan
Published: December 2023

The object of this research is the influence of a distributed work methodology on worker morale in the milieu of perceived organizational support. This paper aims to explore the influence of a distributed work methodology on worker morale in the milieu of perceived organizational support. One of the most challenging aspects of distributed work methodology is recognized and adapting to an unanticipated and novel work approach which is unchartered territory for many. During this research, a mixed methodology is used with a hypothetico-deductive approach, which enabled the testing of a working hypothesis through a sample in the administrative cadre in the public health sector, Cape Town, South Africa. As a result of the research, it is shown that mental health with continued well-being was confirmed as primarily well supported and mitigated by numerous organizational support incentives and therefore, work outcomes are found to be positively related to the influence of worker morale. As worker morale influences worker commitment and engagement levels, which has organizational behavior and productivity implications, it is clear from the findings that conceptualizing multi-dimensional well-being at work is vital to an in-depth comprehension of the relationship between living meaningfully and being content at work. Consequently, in terms of application, it befits management cadres to look at the evidence and ponder the best approach for the future of work. The supposition of a shifted and adapted management-subordinate control that relies primarily on the monitoring of remote outputs is supported, and therefore a proposed approach for future research should be focused on the role of organizational control in flexible work practices. More diverse sampling, representative of various corporate entities and inclusive of private entities, is recommended.
Isomolar series methodology in sensory analysis of fish culinary products for HEALTHY-CAFE
Authors: Manoli Tatiana , Nikitchina Tatiana , Kameneva Natalia , Barysheva Yana , Deli Viktoria
Published: December 2023

The object of research is the technology of fish products for HELTHY-CAFE with regulated histamine content for the development of health food diets for the population. One of the most problematic places in the technology of food products from raw materials of aquatic origin is microbiological spoilage and, as a result, the formation and accumulation of HisA, which in a certain amount causes a toxic effect.
In the course of the study, the methods of isomolar series, sensory analysis, and the study of quality indicators were used. The methodology chosen in the work allows to determine the optimal ratio of hydrocolloids in the system for maximum complexation with histamine in the technology of fish culinary products in gelatin fillings with a harmonious sensory profile and adjustable histamine content.
The obtained results of the conducted research allow to state that the proposed method of determining the optimal ratio of sodium alginate and low-esterified pectin substances contributes to the development of a gelatinous filling for fish culinary products in order to ensure the harmonious flavor of ready-made fish dishes and contributes to the expansion of the range of fish products for HELTHY-CAFE with functional and preventive properties. This is due to the fact that taking into account the modern trends in nutrition regarding the safety, functionality, palatability, and attractiveness of fish food products made it possible, based on the method of isomolar series and sensory analysis, to scientifically substantiate the optimal ratio of plant biopolymers, to form requirements for the texture of gelatin filling in fish technology culinary products. On the basis of previous experimental studies, it was shown that the accumulation of histamine occurs more actively in sea fish, which made it possible to substantiate the choice of raw materials for the production of fish culinary products. Taking into account the main global trends in the development of aquaculture, it is proposed to use crucian carp as a raw material, as the main object of aquaculture in Ukraine. The low activity of the peptide hydrolase complex of the muscle tissue of the carp, compared to sea fish, contributes to the formation of a harmonious aromatic profile of fish culinary products, which corresponds to consumer expectations, and the use of natural hydrocolloids of vegetable origin to form a gelatinous structure provides functional properties to the food product and allows controlling the histamine content.
Загальний курс транспорту
Authors: Капіца М. І. , Кислий Д. М. , Десяк А. Є.
Published: December 2023

У підручнику викладено загальні відомості про транспортну систему України та світу в цілому, також показаний зв'язок усіх видів транспорту між собою, який утворює єдину транспортну систему. Приведена техніко-економічна характеристика основних видів транспорту, основні переваги та недоліки, схеми та порівняння видів транспорту між собою. Розглянуті основні засади організації перевізного процесу, сучасні тенденції розвитку транспорту та транспортної системи в цілому, наукові проблеми та шляхи їх вирішення. Підручник призначений для опанування навчальної дисципліни «Загальний курс транспорту» зі спеціальності 073 «Менеджмент».
Логістичні процеси в експлуатації та ремонті локомотивів
Authors: Боднар Б. Є. , Капіца М. І. , Боднар Є. Б.
Published: December 2023

У навчальному посібнику викладено поняття, сутність, зміст, етапи розвитку та інші характеристики логістичних процесів. Розглянуті структури логістичного управління та методи управління виробничими процесами і матеріальними потоками на локомотиворемонтному підприємстві. Призначений для опанування навчальної дисципліни «Логістичні процеси в експлуатації та ремонті локомотивів» зі спеціальності «Залізничний транспорт» за ОПП «Локомотиви та локомотивне господарство».
Вища математика. Математичний аналіз. Частина 1
Authors: Бусарова Т. М. , Гришечкіна Т. С. , Звонарьова О. В. , Семенець Г. І.
Published: December 2023

Посібник містить основний теоретичний матеріал розділу, велику кількість розв’язаних прикладів, приклади для самостійного розв’язання, варіанти індивідуальних завдань, а також приклади тестових завдань з наведеними відповідями. Для студентів першого курсу інженерно-технічних спеціальностей.
GRACEFUL CHROMATIC NUMBER OF SOME CARTESIAN PRODUCT GRAPHS
Authors: Suparta I Nengah , Venkatachalam Mathiyazhagan , Gunadi I Gede Aris , Pratama Putu Andi Cipta
Published: December 2023

A graph \(G(V,E)\) is a system consisting of a finite non empty set of vertices \(V(G)\) and a set of edges \(E(G)\). A  (proper) vertex colouring of \(G\) is a function \(f:V(G)\rightarrow \{1,2,\ldots,k\},\) for some positive integer \(k\) such that \(f(u)\neq f(v)\) for every edge \(uv\in E(G)\). Moreover, if \(|f(u)-f(v)|\neq |f(v)-f(w)|\) for every adjacent edges \(uv,vw\in E(G)\), then the function \(f\) is called  graceful colouring for \(G\). The minimum number \(k\) such that \(f\) is a graceful colouring for \(G\) is called the graceful chromatic number of \(G\). The purpose of this research is to determine graceful chromatic number of Cartesian product graphs \(C_m \times P_n\) for integers \(m\geq 3\) and \(n\geq 2\), and \(C_m \times C_n\) for integers \(m,n\geq 3\). Here, \(C_m\) and \(P_m\) are cycle and path with \(m\) vertices, respectively.  We found some exact values and bounds for graceful chromatic number of these mentioned Cartesian product graphs.
EXPERIMENTAL INVESTIGATION ON THERMAL PERFORMANCE OF ULTRA-THIN FLATTENED HEAT PIPE WITH MIDDLE HEATING FOR ELECTRONICS COOLING
Authors: Liu Tengqing , He Xuehao , Zhang Yaokang , Wang Shuangfeng
Published: December 2023

For cooling the electronics in limited space, this study proposes ultra-thin flattened heat pipes (UTFHP) with two working modes, i.e., a short UTFHP with single-end heating and single-end cooling (SHSC) and a long UTFHP with middle heating and dual-end cooling (MHDC). The length of the short UTFHP is half that of the long UTFHP. The effects of input heat load and cooling temperature on the thermal performance of the short UTFHP with SHSC and long UTFHP with MHDC have been studied for the performance comparison. The input heat load ranges from 0-38 W and the cooling temperature ranges from 15°C to 65°C. The results show that the two layers wrapped 200 in-1 screen mesh can provide adequate capillary pressure; hence, both of the two UTFHP working modes show good temperature uniformity. The short UTFHP with SHSC shows better thermal performance compared to the performance of long UTFHP with MHDC. In addition, the thermal resistances of both UTFHPs decrease with the increase of the input heat load and the decrease of the cooling temperature under the ranges of operating conditions.
qPCR analysis of Puccinia spp. in turfgrass areas in Türkiye
Authors: Ünal Filiz , Tülek Senem
Published: December 2023

In recent years, with the increase in parks, gardens, recreation areas, picnic areas and refuges with urbanization, the interest in turfgrass areas that beautify the aesthetic appearance of these areas has also increased. In these areas, rust diseases are also becoming increasingly common and causing problems. Rust diseases are an important pathogen group that needs to be monitored due to their ability to create new races and their airborne transmission. In this study, surveys were conducted in turfgrass areas in 8 provinces of Türkiye and 110 turfgrass leaf samples showing rust symptoms were collected. As a result of DNA isolation and qPCR analysis from pustules on the leaf surface, 37 Puccinia coronata, 32 P. graminis, 18 P. striiformis and 23 Puccinia spp. have been detected. It was determined that the most common rust species that causes disease in turfgrass areas in Türkiye is P. coronata. This species was followed by P. graminis and P. striiformis, respectively. While P. striiformis was mostly isolated from Kayseri and Istanbul provinces, P. coronata and P. graminis were mostly isolated from İstanbul.
Fumigant and contact toxicity of Ruta chalepensis l. (Rutaceae) essential oil against five coleopteran stored product pests and its effects on cholinesterases
Authors: Yücel Yasemin Yücel , Karakoç Ömer Cem , Servi Hüseyin , Gücel Salih , Nalbantsoy Ayşe , Polatoğlu Kaan
Published: December 2023

The essential oil composition of aerial parts of Ruta chalepensis L. was analyzed with GC-MS. Seventy-nine compounds were detected representing 85.93 ± 1.08% (n = 3) of the essential oil. The major components of the essential oil were 2-undecanone 21.52 ± 0.21%, 2-nonanone 18.31 ± 0.27%, and 2-nonyl acetate 13.22%. The highest insecticidal contact toxicity of the oil was observed against Rhyzopertha dominica F. with 0.018 μl/insect LD50 and 0.039 μl/insect LD90 after 24h. Essential oil also produced considerably low 0.50 and 0.59 μl/insect LD50 values after 24h against Sitophilus oryzae L. and Sitophilus granarius L. respectively. The lowest contact toxicity was observed against Tribolium castaneum Herbst. and Tribolium confusum Jacquelin du Val. 0.138 and 0.078 μl/insect LD50 after 24h respectively. The highest fumigant toxicity was observed against S. granarius for the application concentration of 10 μl, 10% oil/acetone (v:v) in a 10 ml chamber which afforded 100.00 ± 0.00% mortality after 48h. The essential oil also produced high fumigant toxicity against S. oryzae, T. castaneum and R. dominica which were 95.47 ± 3.41%, 93.30 ± 5.54%, and 85.47 ± 3.41% mortality at 20 μl application concentration of the oil solution after 48h. The R. chalepensis essential oil produced low acetylcholinesterase enzyme 5.29 ± 1.20% (n=3) inhibition and mediocre butyrylcholinesterase enzyme inhibition 42.6 ± 0.71% (n=3). According to the insecticidal activity assays performed, the essential oil R. chalepensis seems to be a promising source that could yield natural compounds that could be employed in stored product pest management.
Viewing Meaning in Life in Three Generations: A Qualitative Study in Turkey
Authors: ŞAHİN Samet , KABASAKAL Zekavet
Published: December 2023

The aim of this study was to understand meaning in life as a phenomenon in three different stages of life. Accordingly, this study aimed to investigate the similarities and differences in the way those in emerging, middle and late adulthood from different families view and experience meaning in life. In the 14 Turkish families who participated in this study, the children were in emerging adulthood, the parents in middle adulthood and the grandparents in late adulthood. The data were collected through one-on-one semi-structured interviews. Based on the questions of the semi-structured questionnaire, five main themes were identified, and the data were analyzed in view of these five themes. The main themes identified were: sources of meaning, meaningful life experiences, search for meaning, goals in life and present meaning. The emerged categories were presented separately for three developmental stages. The results were discussed in light of the literature and some suggestions were made for future research.
The Relationship Between Peer Relationships and Social Appearance Anxiety in Teenagers
Authors: ÜSTÜNDAĞ Alev , KARAARSLAN Buse
Published: December 2023

Friendship relationships contribute to teenagers' psychological, physiological, social, and emotional aspects. This study aimed to examine the relationship between peer relationships and social appearance anxiety in teenagers. The study sample comprised 412 teenagers. A "Personal Information Form," "Social Appearance Anxiety Scale (SAAS)," and "Peer Relationship Scale (PRS)” were used to collect the data. One-way ANOVA, t-test for independent groups and correlation analyzes were used in the analysis of the data. The results show that both friendship relations and social appearance concerns of teenagers are moderately positive. A non-significant relationship was obtained between social appearance anxiety and friendship relations. In the study, it was also determined that there was a significant, negative and low level relationship between the social appearance anxiety of teenagers and the variables of being satisfied with their gender and weight. Research findings also show that girls' mean social appearance anxiety levels are significantly higher than boys' mean. As a result, it can be stated that teenagers should be supported so that they are not adversely affected by social appearance anxiety.
Radiation-resistant optic components of a fiber-optic gyroscope
Authors:   Perm State University, Azanova I.S. ,   Perm Scientific-IndustrialInstrument Making Company, Sharonova Yu.O. ,   Perm Scientific-IndustrialInstrument Making Company, Shevtsova A.D. ,   Perm Scientific-IndustrialInstrument Making Company, Pospelova E.A. ,   Perm Scientific-IndustrialInstrument Making Company, Vakhrushev A.S. ,   Perm Scientific-IndustrialInstrument Making Company, Vokhmyanina O.L. ,   Perm Scientific-IndustrialInstrument Making Company, Volyntsev A.B. ,   Perm State University
Published: December 2023

The paper presents the results of an experimental study of specialized fiber-optic components of a fiber-optic gyroscope (FOG) developed and manufactured by PJSC PNPPK. The study aimed to test their resistance to continuous and pulse ionizing radiation (IR). When exposed to continuous IR, the FOG performance is determined by radiation-induced optical attenuation (RIA) of both the Panda-type polarization maintaining optical fiber (OF) of the gyroscope fiber circuit and the active OF, which is part of the superluminescent fiber radiation source (SFS), as well as by the average wave-length stability of the SFS. It is advisable to compensate a change in the average wavelength as a systematic error. In the case of pulse IR, the recovery time of the FOG is determined primarily by the relaxation time of the RIA of the Panda OF.
Magnetic interaction of nanoclusters in a bimodal ferrocolloid
Authors:   University of Vienna, Kuznetsov A. A.
Published: December 2023

The paper discusses the problem of interaction between a pair of superparamagnetic nanoclusters suspended in a nano-dispersed ferrocolloid and subjected to a uniform magnetic field. The main re-search instrument is the Langevin dynamics simulation method. Dipole-dipole and steric interactions between nanoparticles and clusters are directly taken into account. The net force acting on the clus-ters is calculated for various values of the controlling parameters –the intensity of the applied field and the energy of dipole-dipole interparticle interactions. In the wide ranges of these values, there is observed an effective short-range attraction between the clusters. The strength of the interaction in-creases with an increase in the dipolar coupling parameter. It has been established that the self-organizationof nanoparticles in the vicinity of the clusters also enhances their attraction. Other con-ditions being equal, the force of intercluster attraction in a structured ferrocolloid can be 1.5–2 times higher than in a homogeneous one.
Modeling of the use of AFM in the study of polyurethane samples with a carbonized surface
Authors:   Institute of Continuous Media Mechanics UB RAS, Garishin O. K. , Sokolov A. K. ,   Institute of Continuous Media Mechanics UB RAS
Published: December 2023

One of the most important characteristics of polyurethane endoprostheses used in modern medical practice is the quality of their surface. As a rule, such products are coated with a special carbon-ized nanolayer to improve biocompatibility with living tissue. In terms of mechanical properties, these layers are not as flexible as polyurethane and are prone to brittle microdamage. Therefore, a reliable determination of the presence and distribution of microcracks in the nanocarbon layer on the surface of an endoprosthesis is an important factor for assessing the biocompatibility and pos-sible injury to living tissues in the contact zone. The article presents the results of computer simu-lation of an AFM probe contact interaction with polyurethane samples having a carbonized nano-coating. The main goal of the study was to find an answer to the question whether it is possible to determine the presence of microdamages in polyurethane hidden under a carbonized coating using atomic force microscopy, and to classify them. Obviously, their presence can significantly aggra-vate the damaging effect of surface cracks on living biological tissue during the deformation of an endoprosthesis. Three cases of local microdamages that can occur in such samples are considered: a) there is a vertical crack in the carbon nanolayer, no damage in polyurethane; b) a cohesive dam-age of polyurethane (a vertical crack) was added to the vertical crack in the nanolayer; c) an adhe-sive delamination between the layer and polyurethane (a horizontal crack) was added to the verti-cal crack in the nanolayer. Computer modeling has shown that using atomic force microscopy, it is possible to quite accurately determine the presence of microcracks in the surface carbon nanolayer, while microdamages of the polyurethane itself, hidden under it, have a much weaker effect on nanoindentation.