bluuebunny/crossref_metadata_2025 huggingface dataset:
The use of ePortfolio in health profession education to demonstrate competency and enhance employability: A scoping review
Authors: Hamilton Anita , Downer Terri , Flanagan Belinda , Chilman Laine
Published: July 2023

The use of an ePortfolio to support the education of health and social care professionals is increasing in higher education. ePortfolios support the educational journey of students; however, it is unclear how they are used to demonstrate competency or enhance employability. The aims of this study were to explore the literature to identify the use of ePortfolios in health and social care higher education curricula to demonstrate competency or improve employability. Three electronic databases were searched to identify papers using scoping review methodology. Studies that were published between 2001 and 2019 were included. A total of 1530 articles were initially identified after duplicates were removed. Nine studies were included in the final qualitative synthesis following a robust review. Data were synthesised into themes that describe the role of ePortfolios in demonstrating competencies in higher education or improving employability they were (1) Self-Directed Learning, (2) Deeper Learning, (3) Expanding Literacies, (4) Successful Implementation. These studies highlight that ePortfolio is both a product and a process. ePortfolios support students to gather artefacts that demonstrate professional competency which can be applied in the job-seeking process. The ePortfolio development process applies social constructionist approaches to learning which support lifelong learning and enhance employability. The findings also highlight the importance of providing students with clear expectations of the role of an ePortfolio in their professional learning journey.
Bird Diversity in Paddy Field Habitats During The Paddy Ripening Phase (Oryza sativa L.) Jurong Peujeura Village, Aceh Besar Regency, Indonesia
Authors: Putri Mardiana , Fithri Aida Fithri , Siregar Zuriana
Published: July 2023

Birds are organisms that can be found in a variety of habitats. One of the bird habitats is paddy fields. Birds found in paddy fields generally carry out activities such as foraging, breeding, and competing. This study aims to determine the diversity of birds in paddy field habitats during the paddy ripening phase (Oryza sativa L.). The study was conducted from April to June 2022. The location of the study was Jurong Peujera Village, Ingin Jaya District, Aceh Besar Regency. This study used the Point Count method with a radius of 50 m and a distance between points of 150 m. Observations were made at 9 observation points with 4 repetitions, in which the duration of observations was 10 minutes at each observation point. The observation was conducted in the morning and evening at 06.30-10.00 AM and 03.30-05.00 PM. The results obtained were 2586 bird individuals consisting of 14 species from 11 families. The species with the highest number of individuals are Lonchura punctulata with 1535 individuals and Bubulcus ibis with 637 individuals. The highest percentage of families by species is Ardeidae (22%), and Estrildidae (15%). The Shannon-Wiener bird species diversity index in the paddy field area during paddy ripening phase was obtained H'=1.24 which indicates the level of diversity of the bird species is moderate. Meanwhile, based on the dominance index, Simpson shows a value of C=0.42 which indicates a low bird dominance level. The low level of bird dominance is due to the moderate diversity of species in the paddy field area.
Efficient approximate algorithms for a class of dynamic lot size problem under product substitution
Authors: Huang Shanming , Yang Wanshuo
Published: July 2023

Our motivation to study the production substitution between the products come from the firms’ practice. A significant issue to the firms is the effective balance of setup and substitution cost. Since the firms can adjust the operation policy to lower the setup and substitution costs or both, the operation manager would like to know how best to make the adjustment. Given this, we consider a class of dynamic lot sizing problems with one-way and two-way product substitution under durable and perishable products. According to some structural properties in an optimal solution, we devise a forward dynamic programming algorithm to work out the problem with two durable products in polynomial time, and develop an efficient approximate dynamic programming algorithm to solve the problem with multiple perishable products. Finally, on a comprehensive test bed, we gain some useful insights on the impact of substitution on the total costs. The effectiveness of the approximate algorithm is also tested.
Numerical Simulations for Deterministic-Stochastic Chaotic Cancer Model
Authors: Alalhareth Fawaz , Laksaci Noura , Boudaoui Ahmed , Abdeljawad Thabet , Alharbi Mohammed H.
Published: July 2023

Some real-world problems have complicated behaviors, so in the last twoyears, piecewise calculus has been developed to more accurately depict these issues. Thispaper will elaborate on and examine cancer tumor’s chaotic model from determinism torandomness. Several scenarios are considered. The existence and the uniqueness of thesolutions of the system are proved via Mao’s theorem. Graphics of numerical schemesand their numerical simulations.
AMS (MOS) Subject Classifications: 92B05, 65P20, 26A33
Union Membership and Wage Gap between Public and Private Sectors: Evidence from China
Authors: MA Xinxin
Published: July 2023

As trade unions are active in corporations worldwide, the union effects on the labor market have attracted global attention. However, empirical evidence is scarce regarding how the trade unions’ effects on the wage gaps differ between the public and private sectors. Using the six-wave national longitudinal survey data of 2010-2020, this study estimates the effects of union membership on the wage gap between public and private sectors in China. The results show that there is a positive union wage premiums in both sectors, and the effect is greater for the private sector. The union coverage differences widen the wage gap between the public and private sectors; conversely, the union wage premium difference reduces the wage gap. The results indicate that a policy expanding union coverage in the private sector may effectively reduce the wage gap between the two sectors.
JEL classification: J51, J53, J31, P21, P31, P41
Simulation of gravity field estimation of Phobos for Martian Moon eXploration (MMX)
Authors: Yamamoto Keiko , Matsumoto Koji , Ikeda Hitoshi , Senshu Hiroki , Willner Konrad , Ziese Ramona , Oberst Jürgen
Published: July 2023

To study the origin and evolutionary process of the Martian moon Phobos, understanding its internal structure is important. In this study, we simulate the dynamic orbit and gravity field estimation using Doppler, image landmarks, and LIght Detection And Ranging (LIDAR) data based on a mission plan of Martian Moon eXploration (MMX) and investigate whether the differences in the internal density structure of Phobos can be detected through this mission. Degree 2 Stokes coefficients of the Phobos gravity field, C20 and C22, which are necessary to obtain the moment of inertia by combining with the libration amplitude, could be determined at an accuracy of the order 0.1% using datasets from two-dimensional (2D) quasi satellite orbits (QSOs). If observations from 3D QSO could be realized at low altitude, coefficients up to degree and order 5 could be estimated, which could be used to detect regional density anomalies. Moreover, the observation data from the ascending trajectory after landing on the Phobos surface can be used to detect local density anomalies around the landing site, which could help interpret the origin of the samples.
Noise in digital and digital-analog quantum computation
Authors: Molina Paula García , Martin Ana , de Andoin Mikel Garcia , Sanz Mikel
Published: July 2023

Quantum computing uses quantum resources provided by the underlying quantum nature of matter to enhance classical computation. However, the current Noisy Intermediate-Scale Quantum (NISQ) era in quantum computing is characterized by the use of quantum processors comprising from a few tens to, at most, a few hundreds of physical qubits without implementing quantum error correction techniques. This limits the scalability in the implementation of quantum algorithms. Digital-analog quantum computing (DAQC) has been proposed as a more resilient alternative quantum computing paradigm to outperform digital quantum computation within the NISQ era framework. It arises from adding the flexibility provided by fast single-qubit gates to the robustness of analog quantum simulations. Here, we perform a careful comparison between the digital and digital-analog paradigms under the presence of noise sources. The comparison is illustrated by comparing the performance of the quantum Fourier transform and quantum phase estimation algorithms under a wide range of single- and two-qubit noise sources. Indeed, we obtain that when the different noise channels usually present in superconducting quantum processors are considered, the fidelity of these algorithms for the digital-analog paradigm outperforms the one obtained for the digital approach. Additionally, this difference grows when the size of the processor scales up, making DAQC a sensible alternative paradigm in the NISQ era. Finally, we show how to adaptthe DAQC paradigm to quantum error mitigation techniques for canceling different noise sources, including the bang error.
Effect of agroforestry technology on yield of maize in Sapoba Forest Reserve, Orhionmwon Local Government Area, Edo State, Nigeria
Authors: Owombo Paul Temegbe , Idumah Felix Oaikhena , Ogunsusi Kayode
Published: July 2023

Enhancing crop yield through the adoption of fertility and eco-system enhancing agricultural technologies is an important step towards a sustainable food production system among rural farming households in developing countries. The study was therefore conducted using cross-sectional data from smallholder farming households to assess the effect of agroforestry technology on the yield of maize in Sapoba forest reserve in Orhionmwon Local Government area of Edo State, Nigeria. We correct for endogeneity in adoption and employ instrumental variables analysis to investigate the effect of adoption of the technology on the yield of maize. Our analysis shows that the adoption of the technology had positive and significant effect on the yield of maize in the study area. This finding provides empirical evidence that the yield of maize among smallholder maize farmers can be raised through the use of agroforestry technology.
Multiobjective optimization-based trajectory planning for Laser 3D scanner Robots
Authors: Huang yumeng , Liu guangyu , Yu wujia , Yu shanen
Published: July 2023

In our industrial material defect detecting processes, the multi criteria is considered in two-level motion planning structure.Firstly, the feed speed of the end-effector should be programmed in optimal time for satisfying the requirement of high efficiency.Secondly, the planned joint velocities and accelaration are characterized by high-order derivatives to guarantee smooth motion, taking into account the kinematic constraints.Last but not least,energy consumption of the robot’s movement is a focus during designing trajectories.The Pareto optimal method is applied to solve the trajectory planning problem.The results of the experiments suggest that the Pareto approach can realize effective multi-objective optimization and deliver a group of Pareto solutions for decision makers. Based on the actual requirements, suitable Pareto-optimal trajectory can be achieved and the practical operation of the industrial robot is good
Voracity and conversion efficiency in females of two feral populations of Macrolophus pygmaeus, a biocontrol agent of Tuta absoluta
Authors: Borges Isabel , Oliveira Luísa , Barbosa Francisco , Figueiredo Elisabete , Franco José Carlos , Durão Ana C. , Soares António Onofre
Published: July 2023

Macrolophus pygmaeus(Rambur, 1839) (Hemiptera: Miridae) is a polyphagous predator used in programs of biological control and integrated pest management as natural enemy against small arthropod pest populations, including whiteflies, thrips, spider mites and aphid. This mirid is also successfully mass reared under factitious prey for commercial purposes. In the present study we assessed and compared the voracity, weight gain and conversion efficiency in females of two populations ofM. pygmaeus, one from Portugal mainland and the other from the Azores, fed on single prey diets ofEphestia kuehniellaZeller (Lepidoptera: Pyralidae) eggs, orTuta absoluta(Meyrick) (Lepidoptera: Gelechiidae) eggs. We found that female’s voracity on eggs ofT. absolutawas higher than that ofE. kuehniella, presumably due to the comparative size/amount of biomass of the eggs. Translating voracity in biomass ingested, we only find a significant difference for consumption onE. kuehniellaeggs byM. pygmaeusfrom the Azores. Despite the smaller size of females from the Azores, they were able to consume more prey and ultimately reaching a similar body weight and conversion efficiency compared with females from mainland, independently of the prey provided. Our results are in line with a previous study, showing differences in the life-history traits ofM. pygmaeusfrom Portugal mainland and Azorean populations fed on alternative preys. From an applied perspective, our results are a contribution to the decision-making on the use of the most effective biocontrol agents for different preys and/or agroecosystem contexts.
Condom use increased after a peer group intervention implemented by community volunteers in Malawi
Authors: Norr Kathleen F. , Banda Chimwemwe K. , Chang Cecilia , Krishna Shruthi , Kumbani Lily C. , Liu Li , McCreary Linda L. , Patil Crystal L.
Published: July 2023

Background
HIV prevention remains a global priority, especially in sub-Saharan Africa. Our research team previously developed an evidence-based peer group program for HIV prevention called Mzake ndi Mzake (Friend to Friend). A community-engaged collaboration adapted the program for community ownership and implementation. Here we report whether this HIV prevention program, implemented by community volunteers, increased condom use among sexually active individuals in rural Malawi.
Methods
Three communities sequentially rolled out the program. Effectiveness was evaluated using repeated surveys. At Time 1, no community had offered the intervention. At Time 2, the first community had offered the intervention and two had not (control group). At Time 3, two communities had offered the intervention and one had not (control group). We used two condom use indicators; condom use frequency in the last 2 months (N = 776) and condom use at last sex (N = 880). For each indicator, the sample included all sexually active persons answering that question at one or more time points. Regression analyses were used to model the two condom indicators over time, controlling for demographic factors, UNAIDS HIV knowledge, safer sex self-efficacy and partner communication.
Results
This peer group intervention implemented by trained community volunteers increased both condom use indicators at Times 2 and 3. In the final regression models. Other predictors of greater condom use for at least one condom use indicator included younger age group (13–19), male gender, not married/cohabiting, high involvement in religiously affiliated activities, higher safer sex self-efficacy, and greater partner communication. Although the intervention increased UNAIDS HIV knowledge, knowledge did not predict condom use.
Conclusions
This community engaged implementation study found that an evidence-based peer group program for HIV prevention increased condom use when delivered by trained community volunteers. Leveraging community strengths and human capital resources facilitated implementation of this effective HIV prevention program in rural Malawi. Community ownership and program delivery by trained local volunteers offers an innovative and cost-effective strategy to address ongoing HIV prevention needs without overburdening heathcare systems in sub-
Trial registration
Clinical Trials.gov NCT02765659 Registered May 6, 2016
Curves Along Lorentzian Submersions
Authors: TÜKEL Gözde ÖZKAN
Published: July 2023

We explore the impact of curve theory on the characterization of Lorentzian submersions which are special cases of semi-Riemannian submersions. We firstly give a classification of curves according to their causal character along a Lorentzian submersion. Then, we investigate the effects of certain curves, specifically the non-null Frenet curve, the non-null circle, the non-null helix, and the geodesic, under a Lorentzian submersion, and we seek their geometric meaning. Finally, we examine the situation where a Cartan-framed lightlike curve is carried from the total manifold to the base manifold through a Lorentzian submersion.
Mathematics Subject Classification (2010): 58D17, 58A05, 53C40, 53C20.
Influence of Primordial Black Holes on Cosmic Reionization through Semi-Analytical Modelling
Authors: Jhurani Krish , Gunhal Pranav
Published: July 2023

This research addresses the influence of Primordial Black Holes (PBHs) on cosmic reionization, using a robust semi-analytical model. This model encapsulates cosmological theory, PBH physics, and radiative transfer, with a lognormal PBH mass function as the fulcrum, with the mean PBH mass set at 30 solar masses and the fraction of dark matter in PBHs ( f_PBH) varied from 1.26 to 10. We also adopt a standard thin-disk accretion model and a one-dimensional radiative transfer code for a comprehensive depiction of cosmic reionization under the influence of PBHs. Our major findings reveal an inverse relationship between PBH mass and ionizing efficiency. For instance, when the mean PBH mass is 10 solar masses, and f_PBH is 0.1, the resulting ionizing efficiency is approximately 0.25, which drops to 0.15 with a mean PBH mass of 50 solar masses. However, with f_PBH nearing unity, even large PBHs (mean mass of 100 solar masses) can achieve an ionizing efficiency close to 0.2. The ionization history indicates that for a mean PBH mass of 10 solar masses and f_PBH at 0.01, rapid ionization commences at z=12.5±0.5 and concludes at z=9±0.5. Conversely, with a larger PBH mass of 100 solar masses and f_PBH at 0.01, reionization initiates later, at z=10.8±0.4. Our two-point correlation function analysis unveils the formation of ionized bubbles with an initial size of approximately 10 Mpc at z=7.5±0.5 for an f_PBH of 0.01, expanding to 20 Mpc by the end of reionization. With f_PBH of 0.1, larger bubbles form, starting at approximately 15 Mpc and reaching 30 Mpc by reionization's end. In conclusion, PBHs significantly influence cosmic reionization, with PBH mass and their contribution to dark matter modulating this impact.
Full Immersion Virtual Reality Based Rehabilitation on Upper Extremities Motoric Recovery at Ischemic Stroke Chronic Phase
Authors: Wirawan Florencia , Kusumaningsih Widjajalaksmi , Mistivani Ira , Kekalih Aria
Published: July 2023

Background: This study aims to show the effect of full immersion virtual reality-based rehabilitation (VR) using commercial gaming software on upper limb motor recovery in chronic ischemic stroke patients with hemiparesis.
Case Presentation: This is a case series study in stroke patients who come for treatment at the Medical Rehabilitation Clinic of Cipto Mangunkusumo General Hospital under University of Indonesia. Patients’ baseline data were examined in the form of Fugl-Meyer Upper Extremity (FM-UE), Chedoke Arm, and Hand Activity Inventory (CAHAI), and Brain Derived Neurotrophic Factor (BDNF) scores. Patients received physical rehabilitation treatment for 3 times a week, 30 minutes per session for 6 weeks using Occulus Quest with Beat Saber and Hand Physics Lab software. Post intervention, FM-UE, CAHAI and BDNF data were collected. The study subjects consisted of 2 men and 3 women with an age range of 45 – 59 years, 4 left hemiparesis and 1 right hemiparesis, Brunnstrom IV – VI. After the intervention was given, there was an increase in all three parameters FM-UE (median difference: 2, min – max: 1 – 19, MCID: 5.25), CAHAI (median difference: 2, min – max: 1-18, MCID: 6 .3), and BDNF (median difference: 16.68, min – max: 9.76 - 46.8).
Conclusion: Full immersion virtual reality-based rehabilitation using commercial gaming software shows a promising positive improvement phenomenon in upper limb motor recovery in chronic ischemic stroke patients after 6 weeks of intervention.
Graph Entropy for Adjacently and Non-Adjacently Configured Pentagonal Structure of Carbon Nanocones
Authors: Xavier D. Antony , Baby Annmaria , Varghese Eddith Sarah , Alsinai Ammar , Ahmed Hanan
Published: July 2023

Carbon nanoparticles are gaining much importance in the contemporary world. Among which carbon nanocones have wide range of acceptance in the field of nanotechnology due to its effective properties and applications. Nanocones, also known as nanohorns are carbon networks which are planar in structure and has majority of hexagonal faces along with some non-hexagonal faces, which are most commonly pentagons. Nanocones which include pentagons in their structure can be referred to as adjacently or non-adjacently configured pentagonal structure of nanocones. Carbon nanocones possess properties like specific surface area, high yield, high chemical stability, high purity, low toxicities, exceptional catalytic properties, superior porosity, and good conductivity compared to other carbon nanostructures. These exceptional properties help nanocones to be a good replacement for carbon nanotube. Also nanocones have secured its place in fields like electrochemical sensing or biosensing, biofuel cell, as an electrode material, supercapacitor, gas storage device and biomedical applications. The information entropy was introduced to analyse and quantify the complexity of data and information transmission. It is applied to study the complexity and the quantum chemical electron densities of molecular structures. Later, the idea of graph entropy came into role to characterise the complexity of graphs. The concept of graph entropy is to assign a probablity function to the edges in the chemical graph using the topological descriptor. In this work, the degree based descriptors and the corresponding graph entropies for the adjacently and non-adjacently configured pentagonal structure of nanocones are determined.
A New Approach to Solve Fuzzy Linear Fractional Programming Problems via Rank Function of Trapezoidal Fuzzy Numbers
Authors: Nawkhass Maher A. , Sulaiman Nejmaddin A.
Published: July 2023

Ranking fuzzy numbers is essential to descriptive decision-making and several other fuzzy systems and applications. Numerous techniques have been put forth to rank fuzzy numbers. It has been demonstrated that each of these approaches occasionally yields findings that are counterintuitive. The aim of this studies can be factors such as: firstly, Willingness to improve manufacturing production. Secondly, to minimize production time (negated iteration). Finally, the aspiration to discover new linear fuzzy script The study of “Fuzzy Linear Fractional Programming” FLFP problems with “trapezoidal fuzzy numbers” has been addressed in this research, where the constraints are actual numbers and the objective functions are fuzzy numbers. Obtaining the fuzzy optimum solution with unconstrained variables and parameters has been made possible in this study by the introduction of a modern, effective strategy for the FLFP problems. The newly employed transformation methodology is similarly based on the suggested method of crisp linear fractional programming foundation. To get an ideal answer, a computational method has been provided. A real-world example has been given to show the effectiveness of our suggested methodology.
Bohdan Hawrylishyn's contacts with the Soviet Union
Authors: Gavrylyshyn Petro
Published: July 2023

The purpose of the study is to investigate that part of Bohdan Gavrylyshyn’s life, which is connected with his contacts with the USSR. His trips to the Soviet Union are discussed in detail with interesting facts and events.
The main milestones of his biography are briefly presented. His contacts in Geneva, a well-known center of international life, with Ukrainians who worked as representatives of the Soviet Union, in particular with Oleg Belarus, who worked at the UN Commission on Economic Affairs of Europe, are considered.
His cooperation with the USSR as the director of the Management Training Center in Geneva is analyzed. The factors influencing his vision of the need for contacts with the Soviet Union are described. Bohdan Gavrylyshyn’s contacts with Jermen Gvishiani, who worked in the State Committee of the Council of Ministers of the USSR on Science and Technology, are described. The arrival of interns from the USSR to study at the National Academy of Sciences is shown. His forecast of various options for the future of the USSR and the possibility of its reform were considered.
His first three visits to the Soviet Union are analyzed, in particular his stay in Moscow, Kyiv, Lviv and his native village. The meetings of Bohdan Gavrylyshyn with famous figures of science and technology of the USSR have been revealed. His friendly contacts in Ukraine, the institutions founded by him (the International Institute of Management in Kyiv, the International Renaissance Foundation, the International Center for Prospective Studies), their influence and significance for Ukrainian society are shown. The creation of the Advisory Council under the Verkhovna Rada of Ukraine is described.
His vision of the ineffectiveness of the Soviet Union, which he proved based on his experience in the USSR, is highlighted. The lack of motivation of some trainees who arrived in Geneva from the Soviet Union was noted.
Bohdan Havrylyshyn is one of the extraordinary figures of the Ukrainian diaspora. It was found that by the will of fate and personal interest, he mostly established working contacts with the State Committee for Science and Technology of the USSR. Thanks to this, he visited the Soviet Union several times, even meeting his relatives in his native village. The experience gained helped him to form clearer ideas about the Land of the Soviets, becoming even more convinced of its inefficiency and future disintegration.
During the visit in 1988, he began to establish deeper contacts in Ukraine, firmly intending to devote his further life to its development. As a result, Bohdan Havrylyshyn gradually gained authority in his homeland, became an adviser to Leonid Kravchuk, created a number of institutions that contributed to the development of democracy and civil society in Ukraine.
He managed to integrate incredibly well into Ukrainian society, becoming a bridge between Ukraine and the Western world. Interestingly, during his lifetime he saw with his own eyes the disintegration of the Union of Soviet Socialist Republics, predicted by him back in 1979.
The policy of the administration of the US President Richard M. Nixon on PRC (March-July 1969)
Authors: Goncharenko Anatoliy
Published: July 2023

The article investigates the formation of the foreign policy course of US President Richard M. Nixon on China in March-July 1969. The practical implementation of pre-election initiatives by the administration of the President Richard M. Nixon in the Chinese direction in March-July 1969 was studied. There were analyzed reasons, course and consequences of intensification of Washington's foreign policy strategy towards Beijing during the during investigated period. The role of various groups in the American establishment in the process of forming the foreign policy course of the new administration towards China in March-July 1969 is outlined. It is described the specific US foreign policy actions towards communist China at the beginning of Richard M. Nixon presidential period.
Despite the presence in the political, academic and social circles of the United States of certain attitudes in favor of the recognition of the People's Republic of China as the political reality of international life, the question of the legal recognition of China in the second half of the 1960’s constantly moved to the background.
The victory of Richard М. Nixon in the presidential election in 1968 was accompanied by a series of changes in the system of geopolitical and military priorities of the United States. The new administration’s more realistic approach to China was due primarily to the fact that Beijing, which renounced its alliances and claimed the role of a «third force», was a strong player in the international arena. Moreover, the policy of Kennedy–Johnson did not justify itself, as China has intensified its foreign policy, established relations with many countries, including the US allies.
At the beginning of the presidency of Richard М. Nixon in March-July 1969, his administration was managed to quickly develop and begin to implement a holistic concept of «new policy» for China. His Chinese policy was inextricably linked to the US foreign policy in Asia and reflected the clash of American and Chinese interests in the region. At the same time, the representatives of the American establishment have a clear idea of how they could influence Soviet-Chinese relations in order to deepen the rift between the USSR and China, and what concrete benefits they could derive from this.
A number of objective and subjective factors not prevented the administration of the 37th President of the United States, Richard М. Nixon, radically changing Washington’s Chinese policy. Communist China continued to be recognized as a powerful factor in the US-Soviet dialogue.
In spite of this, in the late 60’s of the twentieth century the objective preconditions began to evolve gradually, which promoted to the normalization of US-China relations in the future, and allowed to resolve most of the controversial issues that ultimately led to the international recognition of the People’s Republic of China by the United States of America.
Numerical study of trimaran wave load based on time-domain Rankine method
Authors:   Navigation College, Dalian Maritime University, Tang Haoyun , Wan Qian , Ren Huilong
Published: July 2023

Due to the complex fluid interference between outrigger and main hull, it is difficult to predict the trimaran load fluctuation accurately in different marine environments. Therefore, a time-domain Rankine method is developed to improve the accuracy of trimaran load prediction. This method successfully adds the nonlinear load components in time-domain load simulation by taking into account the factors such as instantaneous hull wetted surface, steady ship waves, green wave and slamming. Additionally, the nonlinear growth of green wave and slamming is also observed at outrigger and wet deck, with the increasing of speeds and wave heights. Finally, the relatively smaller errors in the Rankine method are confirmed by comparison with the values from a trimaran model test and linear time-domain load prediction method. Furthermore, the weakly nonlinear Rankine method is considered to be more suitable for trimaran load prediction under harsh marine environment.
Smart contracts: Uso da tecnologia blockchain para garantia da eficácia dos acordos celebrados
Authors: Engelmann Wilson , Cantali Fernanda Borghetti , De Zorzi Maya Simões Isabelle
Published: July 2023

O blockchain e os smart contracts têm sido apresentados como soluções inovadoras para diversas questões, em especial, para as formas de contratar e para os modelos de negócio. O blockchain é uma rede descentralizada em que as informações registradas adquirem imutabilidade. Essa tecnologia viabilizou a efetivação dos smart contracts, que, apesar do nome, não são contratos propriamente ditos, mas, softwares capazes de autoexecutar o que foi previamente acordado entre as partes, garantindo eficácia aos acordos celebrados, segurança e redução de custos. Ambas as tecnologias têm se destacado pelas inúmeras vantagens que apresentam, tornando pertinente a reflexão sobre a substituição dos métodos contratuais tradicionais perante o novo cenário tecnológico. Mediante pesquisa exploratória e descritiva, buscou-se identificar os fatores desencadeadores da natureza da tecnologia blockchain, com a realização de apontamentos acerca das principais características constatadas. Os procedimentos utilizados incluíram a pesquisa bibliográfica e a documental, com o objetivo de examinar os reflexos na sociedade contemporânea. Como conclusões, pode-se destacar que os smart contracts não são propriamente contratos, mas softwares, que fazem cumprir e executam os acordos registrados entre as partes, por meio da plataforma blockchain, desenvolvidos para, garantindo o enforcement dos acordos, formalizar e assegurar os relacionamentos digitais, frequentemente utilizados, mas que se tornarão a regra no futuro.
A (in)visibilidade da violência no cotidiano escolar dos alunos cegos
Authors: Ribeiro Solange Lucas , Porto Klayton Santana , Duboc Maria José Oliveira
Published: July 2023

Este estudo buscou compreender quais são as situações de violência simbólica vivenciadas pelos alunos cegos no cotidiano da sala de aula/escola comum. Para tanto, foi realizada uma pesquisa de natureza qualitativa, do tipo etnográfica. Para a coleta de dados, foram utilizadas a entrevista semiestruturada e a observação sistemática. Como sujeitos da pesquisa, foram incluídos 8 alunos cegos de 6 escolas comuns da rede pública municipal, e 20 professores que atuam nas classes onde esses alunos estão inseridos. Os resultados evidenciam que a violência na/da escola está expressa na inacessibilidade, tanto no que se refere à dimensão físico-arquitetônica quanto à programática, metodológica comunicacional e tecnológica, dentre outras. No que se refere ao processo de ensino/aprendizagem, a instituição de ensino costuma atribuir as dificuldades dos alunos com deficiência ao seu déficit sensorial, intelectual e a outros transtornos, e nunca a uma prática docente ou mediação inadequadas, visto que as rotinas e rituais da escola ainda estão presos ao estereótipo do aluno padrão, que não se coaduna com a diversidade dos alunos que estão adentrando as escolas.
Realidad Aumentada como recurso didáctico para el aprendizaje de Biología: un estudio exploratorio desde la percepción de los estudiantes universitarios
Authors: Romero Saritama José Miguel , Cabero Almenara Julio , Gallego Pérez Óscar
Published: July 2023

La pandemia generada por la Covid-19 nos ha dejado grandes desafíos educativos, sobre todo en el contexto de adopción de ciertas tecnologías por parte de los autores educativos para mejorar métodos de enseñanza clásicas. En este sentido, el objetivo del presente trabajo se fundamenta en analizar las posibilidades educativas de la Realidad Aumentada en la asignatura de Biología en la educación universitaria. Se realizó un estudio exploratorio no experimental de corte transversa donde, los estudiantes, luego de revisar y manipular diferentes objetos 3D incorporados en un aplicativo de Realidad Aumentada desarrollado por la Universidad Técnica Particular de Loja, valoraron el trabajo mediante un instrumento de escala tipo Likert. Los datos obtenidos se compararon con las variables sexo, edad y conocimientos previos de los participantes. Los resultados evidenciaron valoraciones altas positivas al uso del aplicativo, limitando diferencias significativas para dos elementos de las dimensiones empleadas, según la edad de los participantes. Este estudio nos permite indicar que el aplicativo de Realidad Aumentada usado, es una herramienta que puede potencializar, favorecer y motivar el aprendizaje de los estudiantes.
E-module Newton's Law of Gravity based Guided Inquiry to Train Critical Thinking Skills
Authors: Sari Deswita Elliya , Herlina Kartini , Viyanti Viyanti , Andra Doni , Safitri Ida
Published: July 2023

The study aims to develop an electronic module based on guided inquiry on Newton's law of gravity material that is valid, practical, and effective. The developed e-module aims to practice critical thinking skills in physics learning. This development research uses the ADDIE development method which consists of five steps, namely analysis, design, development, implementation, and evaluation. Student response questionnaires to guided inquiry e-modules and tests of critical thinking skills became research instruments. Data analysis presented with quantitative descriptive. The product validity was assessed by 3 experts with an average score of 3.63 with category very valid. The practicality of the product consisted of readability which was tested on 15 high school students in Grade X and the teacher's perception of the suitability of guided inquiry-based learning activities in e-modules by obtaining an average percentage of 90% in the category very practical. The effectiveness of the product is assessed based on students' responses of critical thinking skills are improve after using the e-module by obtaining a product effectiveness percentage of 87% with category very effective. Student response questionnaire showed a positive response to the developed e-module. Based on the analysis of the research results, it is stated that the guided inquiry-based e-module on Newton's law of gravity is valid, practical, and effective for practicing critical thinking skills.
On the Boundedness of Solutions of a Quasilinear System of Ordinary Differential Equations
Authors:   Vologda State University, Mukhamadiev Ergashboy , Naimov Alizhon Nabidjanovich ,   Vologda State University
Published: July 2023

In the paper, the question of the boundedness of an arbitrary solution of a quasilinear system of ordinary differential equations is investigated under boundedness of the observed values of the solution. The observed values of the solution are a finite set of scalar products of the solution with given vectors. In terms of the properties of the matrix of coefficients of the system of equations and the matrix of coefficients of observed values, theorems on the boundedness of an arbitrary solution with boundedness of the observed values are formulated and proved. The novelty of this paper is that using the method of limit equations, estimates are derived from which the boundedness or stability follows an arbitrary solution of a quasilinear system in terms of boundedness or stability of the observed values of the solution.
A Time-optimal Problem of Stopping a Two-link Pendulum on a Movable Mount
Authors:   Instute of Control Sciences RAS (ICS RAS), Potapov Anton Pavlovich ,   Lomonosov Moscow State University, Galyaev Andrey Alekseevich ,   Instute of Control Sciences RAS (ICS RAS),   Lomonosov Moscow State University
Published: July 2023

We consider a time-optimal problem of stopping a two-link pendulum on a movable mount. Given nonlinear system with the lack of and limitation on the control resource is linearized in the neighborhood of a stable equilibrium position. For a linearized system the Pontryagin maximum principle is used and the optimal control law obtained. To estimate parameters of the law basing on finding out an orthogonal subspace was an algorithm developed for constructing a time-optimal system control. A software module has been developed in the Matlab environment with the help of which a comparison of the dynamics of linear and nonlinear systems with the obtained control law was made.
Atriopathy and atrial fibrillation. Part II
Authors:   Pavlov First Saint Petersburg State Medical University, Yashin Sergei , Shubik Yuri ,   St. Petersburg State University
Published: July 2023

Atrial fibrillation is based on various forms of congenital and acquired pathology. When choosing a method of treatment, it is important to understand not only the causes of arrhythmia in a particular patient, but also the features of its mechanism and progression factors. Obviously, there is a difference in the mechanisms of paroxysmal and nonparoxysmal forms of atrial fibrillation. Criteria and methods for assessing the stage of possible reverse structural and functional changes in the atria after stabilization of the heart rate are of great clinical importance. The second part of the review reflects the immediate causes of atriopathy, including heart amyloidosis, mutations of the natriuretic peptide precursor A, hereditary myodistrophia, heart failure, obstructive sleep apnea, drug effect, myocarditis, genetic disorders of repolarization, aging, arterial hypertension, obesity, diabetes mellitus, heart defects, atrial fibrillation itself. Qualitative and quantitative methods of atrial fibrosis evaluation are described, as well as the possibilities of reverse remodeling. The potential role of fibrosis as a direct cause of systemic thromboembolism and ischemic stroke in atrial fibrillation patients is considered. Ways of atriopathy prevention and treatment are discussed. An algorithm for assessing the severity of atriopathy and the probability of maintaining sinus rhythm are presented.
Alexandre Benois and Denis Diderot
Authors:   Research Institute of Theory and History of Fine Arts of the Russian Academy of Arts, Zavyalova Anna E.
Published: July 2023

The article is the first to consider the influence of the views of Denis Diderot (“Salons”) on the works of Alexandre Benois — as an art historian, first of all — on his “The History of painting of all times and peoples”. As a result of a comparative analysis of the texts by two authors, it was established that both Benois and Diderot paid the greatest attention to the works of J. B. S. Chardin, F. Boucher, C. (Sh. A.) Vanloo, J.-B. Greuze, J.Robert. It has also been established that Benois described the art of Chardin and Boucher practically in the words of Diderot. The source study analysis of Benois’s article “The Collection of Drawings by Stepan Yaremich”, as well as Benois’s “Art letters” of different years, made it possible to find out his own attitude to Busher. The source study analysis of Benois’s memoirs “My Memories” and the work of R. Muther “The History of Painting in the 19th Century” made it possible to find out the source of Benois’s negative assessment of narrative and edifying in the art of Dreams — precisely those qualities that Diderot especially appreciated in the works of this artist. Comparative analysis of the text of Benois’s article “On Narrative in Painting”, his work “History of Russian Painting in the 19th Century” with the text of “Salons” by Diderot made it possible to find out that Benois used at the beginning of his activity the Diderot’s method of an expanded description.
Works of Art in the Thematic Collections of the Grand Duke Mikhail Nikolaevich. From the Experience of the Collection Reconstruction
Authors:   The Altai State University, Kreydun Yuri A. , Reutova Elena M. ,   The Altai State University,   Omsk Regional Museum of Fine Arts named after M. A. Vrubel
Published: July 2023

The article is devoted to the collection of works of art by the Grand Duke Mikhail Nikolaevich, which was located in the New Mikhail Palace before the revolution, which today does not exist as a single whole, but has been preserved as separate parts in central and regional Russian museums. On the basis of the reconstruction of the collection, carried out with the help of written sources and the revealed pictorial series, its composition was analyzed, the main thematic blocks were highlighted and the characteristic features of the collecting activity of its owner were determined. Until now, this aspect has not become the subject of special study. The novelty of the study also lies in the use of previously unpublished archival documents, the main place among which is occupied by the surviving inventories of the movable property of the New Mikhail Palace, compiled during the life of Grand Duke Mikhail Nikolaevich, as well as after the nationalization of the palace. The study of sources, as well as works of art stored in Russian museums, made it possible to fully recreate and reconstruct the composition of this collection. The study showed that numerous items related to military history, Caucasian life, and hunting were kept in the New Mikhail Palace, which reflected the professional occupations and interests of Grand Duke Mikhail Nikolaevich. Works of art have been an integral part of these thematic collections. The main criterion for their selection was the plot, and the main requirement for works of art was the exact fixation of the events depicted, many of which were witnessed or participated by the owner himself. The authors of numerous paintings, graphic works and sculptural compositions located in the New Mikhail Palace were both renowned artists of their time and lesser-known Russian and European masters. The significant role of Emperor Nicholas I in the formation of the artistic tastes of the Grand Duke Mikhail Nikolaevich and the requirements that he set for works of art is noted.
Wanderers of Russian roads: Images of folk religiosity
Authors:   St. Petersburg Mining University, Dorofeev Daniil Yu.
Published: July 2023

The article is devoted to the study of the philosophical, theological and religious significance of the Wandering in Russian Orthodox culture, primarily as a unique image of folk religiosity. The author considers the concept of ‘Wanderer’ as one of the fundamental concepts in Russian culture. Its multiple meanings and semantic heterogeneity are revealed and analyzed both in European and domestic cultures; for this, in particular, the author refers to the experience of European and especially Russian literature of the 19th–20th centuries, in which a polysemantic image of a wanderer appears. The author is indicated value of visual image of Wanderer is studied in more detail in Russian painting of the 19th century. The valuable material on the cultural characteristics of Russian Wandering was collected by S.V.Maksimov in the second half of the 19th century. The main attention is directed to the image of Wanderer in the religious and philosophical perspective of Russian Orthodoxy. The author refers to the Christian origins of the image of Wanderer. The specificity of Wanderer’s attitude to the world, his existence, other people, God is specified, as well as the connection of the concept of Wandering with the principles of Hesychasm. The author draws a special attention to the importance of good looks and tenderness as important characteristics of the image of Wanderer. Through an appeal to the traditions of Christology and patristic Orthodoxy, Hesychasm and eldership, the writings Russian literature, the anonymous author of ‘Frank Stories of a Wanderer to His Spiritual Father’, Russian painting of the 19th century, and modern Orthodox religious and philosophical thought, the author of the article is to reveal the unique meaning of the image of Wanderer and emphasize its special meaning-forming role for Russian Orthodox culture.
The Cell Biocompatibility of a new Polycaprolactone-based Endodontics Sealer Compared with AH Plus Sealer
Authors: Torbati Mostafa , Maleki Anita Basiri , Torbati Mohammadali , Shahi Shahriar , Dizaj Solmaz Maleki , Sharifi Simin
Published: July 2023

Background:

One of the important materials needed for root treatment is the sealers. They fill the space between the gutta and the canal walls and create a suitable seal to prevent the colonization of oral microorganisms in the peri-apical tissues and inside the canal space.

Aim:

The aim of this study was to prepare and test the cell biocompatibility of a new polycaprolactone-based endodontics sealer in comparison to AH plus sealer against dental pulp stem cells.

Methods:

MTT assay was used to evaluate the cytotoxicity.

Results:

The results showed that AH plus showed moderate cytotoxicity effects against cells (the number of living cells was 49.45 ± 10.56%). However, for the new sealer, the number of living cells was ≥ 80% (81% ± 4.11). Thus, the sample was non-cytotoxic against tested cells.

Conclusion:

More investigations are needed on the new sealer to validate its biocompatibility and usefulness.