bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of a digital twin of the heating network in various software systems
Authors: Shishkin A. V. , Meshalova P. V. , Zenin S. A. , Zenkova A. A. , Yavorovsky Y. V. , Malenkov A. S. 
Published: November 2022

The concept of implementation of smart thermal grids or 4th generation heat supply systems is a priority for the development of district heating systems in Russia and is to become the best available technology (BAT) for all new and reequipped energy systems. This will help to reduce inappropriate losses of thermal energy, reduce the accident rate of power systems, increase their energy efficiency and reliability, and simplify the integration of modern renewable energy sources (RES) into existing energy systems.One of the key technologies needed to create such systems is the creation of digital twins of heating networks and simulation models of district heating systems. The paper describes the development of a digital twin for the section under consideration of the heat network. The developed experimental stand — a real physical model — was used as a section of the heating network. It was subjected to tests in order to determine the capabilities of systems for remote monitoring of heat carrier parameters, as well as modeling emergency situations in sections of the heating network. The experimental setup was also used for verification of the digital twin being developed. To create a digital model of the experimental stand authors used Matlab Simulink, ZuluThermo and SimInTech. The ZuluThermo program enables to create a digital twin that simulates stationary modes of the thermal system, Matlab Simulink and SimInTech — both stationary and dynamic processes occurring on sections of heating networks. The dynamic model of the heat supply system was used to simulate the process of mutual influence of heat energy consumers. As scenarios of dynamic processes, situations in Matlab Simulink and SimInTech that arise during the operation of automation at thermal points of consumers were simulated. It was shown the mutual influence of heat consumers on each other when regulating the heat load, as well as their influence on consumers who are unable to independently regulate their heat load.
Soil and Water Conservation Engineering Techniques to Modify the Rhizosphere Climate of Cucumber (Cucumis Sativus L.) for Improving Water Use Efficiency and Yield
Authors: Harinarayanan Mallapurath Narayanamangalam , Ramanatha Subbiah , Nagarajan Karuppalaki , Kalarani Muthusamy Karuppusamy , Sathyamoorthy Nagaranai Karuppasamy , Geethalakshmi Indran , Ramya Sundarapandian 
Published: November 2022

Abstract
The research was conducted to study the performance of cucumber under protected conditions with different plastic mulches. This experiment was conducted in a split plot design, having irrigation levels as main plot and mulches as subplots. The study revealed that mulching helped to maintain the soil moisture higher than bare soil and black mulch showed higher soil temperature and soil moisture (23.3%) under 100% irrigation. Plant height and yield was also influenced by mulching. Plant height and yield decreased in relation to reduction of the irrigation level. The highest water use efficiency (WUE) was found under 50% irrigation and black mulch plot (32 kg·m−3). In conclusion, black mulch with 100% irrigation performed well among the treatments because of higher moisture and favourable soil temperature. In consideration of WUE, black mulch with 50% irrigation performed well.
Numerical Criterion for the Duration of Non-Chaotic Transients in ODEs
Authors: Szczebiot Ryszard , Kaczyński Roman , Gołdyn Leszek 
Published: November 2022

Abstract
The paper proposes an original numerical criterion for the duration analysis of non-chaotic transients based on the Euclidean norm of a properly defined vector. For this purpose, transient trajectories, prior to their entering a small neighbourhood of the limit cycle, are used. The vector has been defined with its components constituting the lengths of the sections, which connect the origin of the coordinate system with appropriately determined transient trajectory points. The norm of the vector for the analysis of non-chaotic transients has also been applied. As an assessment criterion of transients, the convergence of the norm to small neighbourhood of the limit cycle with the assumed accuracy is used. The paper also provides examples of the application of this criterion to the Van der Pol oscillators in the case of periodic oscillations.
Application of the Deformation Fracture Criterion to Cracking of Disc Specimens with a Central Narrow Slot
Authors: Kazberuk Andrzej 
Published: November 2022

Abstract
Using the method of singular integral equations, the elastic-plastic problem for cracked Brazilian disk was solved. Based on the Dugdale model and deformation fracture criterion, the relationships between critical load, notch tip opening displacement and length of the plastic strips were established. Also, the comparison between the present solution for the finite domain and the known solution obtained for the semi-infinite notch in the elastic plane was performed.
Agreement of measures between measured body adiposity and calculated indices of fatness in sedentary and active male and female students
Authors: Malara Marzena , Kęska Anna , Tkaczyk Joanna , Lutosławska Grażyna 
Published: November 2022

Abstract

Study aim: Our study was undertaken to analyze agreement between measured body fat and different indices of fatness in students of both sexes and with different physical activity.

Materials and methods: A total of 330 students not engaged in regular physical activity (150 males and 180 females) and 356 students (180 males and 176 females) engaged in regular physical activity due to their study program (5–7 h/week) were recruited. In all participants body adiposity was measured from skinfold thickness. In addition, calculated indices of fatness based on waist (WC) and hip circumference (HC), such as abdominal volume index (AVI), body adiposity index (BAI) and relative fat mass (RFM) were calculated.

Results: The analysis of Bland-Altman plots revealed that agreement between measured and calculated body fat was found for RFM and BAI in sedentary and active men and for BAI in sedentary women, but not for measured body fat and RFM in sedentary women and for RFM and BAI in active women.

Discussion: Our study showed that in young adult Poles of both sexes and with different physical activity, the calculated obesity rates should be used with caution, especially in women, as an indicator of total body fat.
Appraisal of Teaching and Supervision Load of Academic Staff in Selected Universities in Nigeria
Authors: Oladejo Segilola Yewande 
Published: November 2022

Abstract
Nigerian universities have been attributed to lack of funds, inadequate infrastructure, improper teaching aids (laboratories, projectors, libraries, and computers) and irregular or lack, thereof, of salary as evidenced in some states in Nigeria. It is of little wonder then that the work performance of academic staff will spiral down particularly in terms of their teaching and supervision, research and publication and their involvement in community development services. This study, therefore, assessed teaching and supervision load of lecturers in some selected universities in Nigeria. Data were obtained using semi-structured questionnaire from nine universities. Through proportional sampling technique, 25% of the academic staff in each university were selected giving a total of 969 as the sample size. Data were analyzed using SPSS. The results showed that teaching and supervision load of the academic staff was quite heavy; hence, concluding that the performance of academic staff in terms of their teaching and supervision in the selected universities is unsatisfactory.
Against steady state
Authors: Garzanti Eduardo , Sternai Pietro 
Published: November 2022

AbstractNature is never at a steady state. Natural history is generated by ever-new and ever-interacting forces that produce continuous changes. At virtually all timescales, the geological record shows that these changes do not cancel each other out and, thus, that the steady state is utopic. However, we need a state of equilibrium as a starting point for modelling Nature, and the steady-state condition is widely used as a reference in idealisations aimed at understanding natural processes. The present contribution is meant as an epistemological note of caution − from Earth scientists to Earth scientists − aimed at discouraging the use of theoretical models as true evidence instead of terms of comparison.
Evaluation of Physiological Stress Experienced by Divers Maintaining an Upright Position on the Water Surface Depending on the Buoyancy Control Device
Authors: Żebrowska Aleksandra , Siermontowski Piotr , Mikołajczyk Rafał , Sikora Marcin , Łakomy Olga 
Published: November 2022

AbstractThe knowledge of physiological reactions enabling a diver increasing the functional reserve in a life-threatening situation is not yet complete. It is suggested that the ability to adapt to prolonged stress experienced by divers maintaining an upright position on the water surface is associated with the diver’s individual characteristics and the type of the buoyancy control device. The purpose of this study was to perform a preliminary evaluation of physiological variables in divers wearing two different types of buoyancy control device and floating upright at the surface to determine the level of safety offered by each of them. The physiological variables were measured while participants wearing a classical dive vest and a wing dive vest. The oxygen uptake and heart rate measured after 30 minutes of experiment were significantly greater in participants using wing dive vest than classical dive vest. The results confirm the possibility of using physiological indicators to compare the fatigue and rescue function in divers depending on the buoyancy control device type.
Religiusitas dan Psychological Well-Being selama Masa Pandemi pada Anggota Gerakan Pemuda GPIB Tamansari Salatiga
Authors: Winman Theo Desiano , Soetjiningsih Christiana Hari 
Published: November 2022

<p>The GPIB Youth Movement is a youth association at GPIB Tamansari Salatiga which usually holds worship services and joint choir exercise in churches, but these activities were delayed and had to be held online during the COVID-19 pandemic. This pandemic situation also impact on <em>psychological well-being</em>, especially the youth. One of the factors that influence <em>psychological well-being</em> is religiosity. The purpose of this study was to determine the relationship between religiosity and <em>psychological well-being </em>in the youth of GPIB Tamansari Salatiga during the COVID-19 pandemic. The respondents in this study were 50 youths of GPIB Tamansari. The measuring instruments in this research are<em> Ryff's Psychological Well-Being Scale</em> (α = 0,921) and <em>Centrality of Religiosity Scale</em> (α = 0,904). Correlation test results<em> </em>show a positive relationship between religiosity and <em>psychological well-being </em>in the youth of GPIB Tamansari Salatiga during the COVID-19 pandemic.</p><p> </p><p>Gerakan Pemuda GPIB merupakan persekutuan pemuda-pemudi di GPIB khususnya Tamansari Salatiga yang biasanya mengadakan pelayanan ibadah dan latihan paduan suara bersama di gereja, namun kegiatan-kegiatan tersebut sempat terhambat dan terpaksa diadakan secara online akibat pandemic COVID-19. Situasi dimasa pandemi ini juga berdampak pada <em>psychological well-being</em> khususnya para pemuda. Salah satu faktor yang mempengaruhi <em>psychological well-being</em> adalah religiusitas. Tujuan penelitian ini untuk mengetahui hubungan religiusitas dengan <em>psychological well-being </em>pada pemuda GP GPIB Tamansari Salatiga selama masa pandemi COVID-19. Responden dalam penelitian ini sebanyak 50 orang pemuda GP GPIB Tamansari. Alat ukur dalam penelitian ini yaitu<em> Ryff’s Psychological Well-Being Scale</em> (α = 0,921) dan <em>Centrality of Religiosity Scale</em> (α = 0,904). Hasil uji korelasi<em> </em>menunjukkan adanya hubungan yang positif antara religiusitas dengan <em>psychological well-being </em>pada pemuda GP GPIB Tamansari Salatiga selama masa pandemi COVID-19.</p>
Kepercayaan Diri dan Compulsive Internet Use (CIU) pada Mahasiswa Fakultas Psikologi di Masa Pandemi COVID-19
Authors: Aria Cessna , Rahayu Maria Nugraheni M. 
Published: November 2022

<p><strong>Abstract. </strong><em>This study aims to find out a significant relationship between confidence and compulsive internet use in students during the COVID-19 pandemic. This research uses a quantitative approach with correlation methods.</em> <em>This study has a sample of 159 students studying at the Faculty of Psychology, Satya Wacana Christian University. Personal Evaluation Inventor and Indonesia Problematic Internet Use Scale are used as instruments in collecting research data. Analysis using descriptive statistics and Product Moment techniques. The research analysis results showed a significant negative relationship between the confidence variable and the CIU variable in the 2020 Class of students of the Faculty of Psychology during the COVID-19 pandemic (r=-0.300; p=0.000). This can be interpreted that the higher the confidence, the lower the compulsive internet use, and vice versa the lower the confidence, the higher the compulsive internet use are.</em></p><p><strong><em>Keyword: self-confidence, compulsive internet use, student college, pandemic of COVID-19.</em></strong></p><p><strong><em><br /></em></strong></p><p><strong>Abstrak. </strong>Penelitian ini bertujuan untuk menemukan hubungan yang signifikan antara kepercayaan diri dan penggunaan internet secara kompulsif pada mahasiswa selama pandemi COVID-19. Penelitian ini menggunakan pendekatan kuantitatif dengan metode korelasional. Penelitian ini mengambil sampel dengan metode <em>simple random sampling</em> sebanyak 159 mahasiswa yang berkuliah di Fakultas Psikologi Universitas Kristen Satya Wacana. <em>Personal Evaluation Inventor</em> dan <em>Indonesia Problematic Internet Use Scale</em> digunakan sebagai instrumen dalam pengumpulan data penelitian. Analisis menggunakan statistik deskriptif dan teknik <em>Product Moment</em>. Hasil analisis penelitian menunjukkan bahwa terdapat hubungan negatif yang signifikan antara variabel kepercayaan diri dengan variabel CIU pada mahasiswa Fakultas Psikologi angkatan 2020 pada masa pandemi COVID-19 (r=-0,300; p=0,000). Artinya bahwa semakin tinggi rasa percaya diri maka semakin rendah penggunaan internet secara kompulsif, dan sebaliknya semakin rendah kepercayaan maka semakin tinggi penggunaan internet secara kompulsif.</p><p><strong>Kata kunci: kepercayaan diri, penggunaan internet kompulsif, mahasiswa, pandemi COVID-19.</strong></p>
Forecasting the Effects of Failure Criteria in Assessing Ship Structural Damage Modes
Authors: Prabowo Aditya Rio , Ridwan R. , Tuswan T. , Imaduddin Fitrian 
Published: November 2022

The failure to achieve satisfactory results will cause immense losses in major projects. Nevertheless, the modeling limitations and phenomenon assumptions represented by failure criteria can significantly influence the final results—e.g., the damage mode, affecting its quantification—thus representing an interesting topic for technical assessment. This work aims to forecast the effects of several failure criteria on the damage occurring due to structural loading schemes, such as compression, torsion, and tensile tests. Failure criteria are taken based on the proposal of pioneer researchers and include those of Peschmann (P), Germanischer Lloyd (GL), Liu (LIU), and Rice–Tracey and Cockroft–Latham (RTCL). A series of nonlinear finite element analyses (NLFEA) are conducted by inputting these criteria into different loading schemes. To obtain reliable validation, the proposed models are designed based on previous laboratory experiments. The numerical results of NLFEA in the forms of damage mode, i.e., tearing, plastic deformation, and torsion, are cross-checked with experimental data. The results show that numerical modeling using the LIU criterion produces slightly larger discrepancies compared with experimental data. This indication is founded on the analysis of stress–strain, load–displacement, and shear stress–strain during the tensile test, compressive load, and torsion load, respectively. According to this work, we formulate recommendations based on the forecast tendency and accuracy for each damage mode subjected to failure criteria. Therefore, future works can adopt the findings in our current work when choosing to apply specific criteria in structural modeling and load idealization. Doi: 10.28991/CEJ-2022-08-10-03 Full Text: PDF
A Triangular Shell Element Based on Higher-order Strains for the Analysis of Static and Free Vibration
Authors: Sekkour Hamida , Belounar Lamine , Belounar Abderahim , Boussem Faiçal , Fortas Lahcene 
Published: November 2022

This research paper proposes a new triangular cylindrical finite element for static and free vibration analysis of cylindrical structures. The formulation of the proposed element is based on deep shell theory and uses assumed strain functions instead of displacement functions. The assumed strain functions satisfy the compatibility equations. This finite element possesses only the five necessary degrees of freedom for each of the three corner nodes. The element's displacement field, which contains higher-order terms, satisfies the requirement of rigid-body displacement. The element's performance is evaluated using various numerical static and free vibration tests for cylindrical shell problems, including an analysis of the effect of shell openings on natural frequencies. The results of the developed element are evaluated in comparison with published analytical and numerical solutions. The new cylindrical element's formulation is straightforward. Compared to the degenerate nine-node shell element and other elements, the results of the present element have shown excellent accuracy and efficiency in predicting static and free vibration of curved structures. This element only requires the use of very coarse meshes to converge. In addition, the triangular shape of this element is more advantageous than the quadrilateral shape when the geometric domain of the structure is deformed or complicated. Doi: 10.28991/CEJ-2022-08-10-06 Full Text: PDF
What do Indonesians talk when they talk about COVID-19 Vaccine: A Topic Modeling Approach with LDA
Authors: Saputri Theresia Ratih Dewi , Lestari Caecilia Citra , Siahaan Salmon Charles 
Published: November 2022

To end the COVID-19 pandemics, the government attempted to accelerate the vaccination through various programs and collaboration. Unfortunately, the number is still relatively small compared to the number of populations in Indonesia. There are some reasons attributed to this challenge, one of them being the reluctance of citizens to accept the COVID-19 vaccine due to various factors. Knowing this factor to increase public compliance, the vaccination program can be speed-up. Unfortunately, traditionally acquiring the knowledge related to COVID-19 vaccine rejection can be challenging. One of the ways to capture the knowledge is by conducting a survey or interview related to COVID-19 vaccine acceptance. This method can be inefficient in terms of cost and resources. To address those problem, we propose a novel method for analyzing the topics related to the COVID-19 Indonesians’ opinions on Twitter by implementing topic modeling algorithm called Latent Dirichlet Allocation. We gathered more than 22000 tweets related to the COVID-19 vaccine. By applying the algorithm to the collected dataset, we can capture the what is general opinion and topic when people discuss about COVID-19 vaccine. The result was validated using the labeled dataset that have been gathered in the previous research. Once we have the important term, the strategy based on can be determined by the medical professional who are responsible to administer the COVID-19 vaccine.
Eccellenze cafoscarine nella storia del Dipartimento di Economia
Authors: Billio Monica , Parussolo Marco 
Published: November 2022

In 2018, Ca’ Foscari University of Venice celebrated the 150th anniversary of its foundation. In 2021 the Department of Economics celebrated its first 10 years in the new configuration, following the statutory reform due to the Gelmini law (nr. 240 of 30 December 2010). This volume is a tribute to some excellent cafoscarini who have made the history of Ca’ Foscari but also the cultural heritage of the Department of Economics, without claiming to be exhaustive, but with the desire to tell something about Ca’ Foscari excellences.
Nine academic figures are described: from the economist Francesco Ferrara (founder of the Royal School of Commerce) to the administrative Feliciano Benvenuti (Rector from 1974 to 1982), from the mathematician Mario Volpato to the expert in private law Lycia Contursi-Lisi Gardani, who with their scientific, human and professional contributions, are still today a source of pride and strong inspiration for the Department. The collection includes the profiles of 9 professors who taught at the Venetian university: Francesco Ferrara (1810-1900), Primo Lanzoni (1862-1921), Gino Luzzatto (1878-1964), Silvio Trentin (1885-1944), Giulio La Volpe (1909-1996), Mario Volpato (1915-2000), Feliciano Benvenuti (1916-1999), Lycia Contursi-Lisi Gardani (1920-2004), Giulio Partesotti (1937-2004).
Silvio Trentin
Authors: Benvenuti Luigi 
Published: November 2022

Silvio Trentin (San Donà di Piave, 11 November 1885-Monastier di Treviso, 12 March 1944) was an Italian partisan and jurist. He was Professor of public law at Ca’ Foscari. He participated as a volunteer in the First World War. Deputy since 1919, after the advent of fascism he was part of the constitutional opposition with G. Amendola. Forced into exile (1926), he settled in France, where he carried out an intense publicistic activity and militated in the ranks of Justice and Freedom (1929). After taking part in the French clandestine struggle, he returned to Italy in 1943 and participated in the resistance in the Action Party until his arrest in November of the same year. He died in prison.
Ohio Physicians’ Retrospective Pre-Post COVID-19 Pandemic Reports of Burnout and Well-Being
Authors: McCloskey Rebecca J. , Clark Hammond Gretchen , Gallant Kathleen , Santucci Robert , Koralewski Justin , Kocinski Michael 
Published: November 2022

ABSTRACT
This cross-sectional, retrospective, pre-post repeated measures study aimed to describe Ohio physicians’ burnout and mental health experiences as perceived prior to and during the COVID-19 pandemic. A one-time online survey was completed by 1,613 physicians registered with the State Medical Board of Ohio (SMBO). Wilcoxon signed-rank tests were used to assess differences between physicians’ self-reports of burnout and mental health prior to and during the pandemic. Mann-Whitney U tests examined response differences between physicians and residents. Data revealed statistically significant differences between physicians’ pre-pandemic and pandemic experiences for all measures of burnout and mental health (p &lt; 0.001) with moderate effect sizes for feeling emotionally drained from work (Z = −16.71, r = 0.43); feeling down, depressed, or hopeless (Z = −18.09, r = 0.46); feeling less accomplished (Z = −11.03, r = 0.29); and caring less about what happens to patients (Z = −12.04, r = 0.31). Small effect sizes were found for thoughts of suicide and concerns about one’s substance use. Additionally, resident physicians were more likely than physicians to report many burnout and mental health concerns prior to and during the pandemic, although these effect sizes were small. These findings can inform stakeholders’ efforts toward the prevention and reduction of physician burnout and improvement of well-being.