bluuebunny/crossref_metadata_2025 huggingface dataset:
THE STATE OF ENFORCEMENT OF REGULATORY REGULATION OF THE TOURISM SECTOR OF THE CITY OF SEVASTOPOL
Authors:   Севастопольский государственный университет, Севастополь, Россия, Станислав Александрович Васильев
Published: April 2023

The relevance of this study is to maintain the attractiveness of individual tourist destinations, despite the imposed foreign economic restrictions (sanctions) and the difficult logistical situation due to the conduct of a special military operation on the territory of Ukraine. In order to develop tourism against the background of the closure of a large number of foreign destinations for Russians, it is necessary not only to create a high-quality regulatory framework, but also to organize its effective implementation. The purpose of this work was to conduct a study of the application of the provisions of the legislative act of the city of Sevastopol, which regulates the implementation of tourist activities in order to identify certain pathogenic practices. The method of analysis was used as materials and methods, parsing the law into separate norms, followed by an assessment of the practice of implementing the most significant ones. The comparative legal method was used, both in relation to acts that have become invalid, and from the standpoint of comparing regional legislation and subordinate regulatory regulation. In addition, the method of expert assessments and deduction was used. As a result, some inconsistencies were identified in terms of the development of the provisions of the legislation in the acts of the executive authorities, which should be eliminated. In addition, certain areas of activity have been identified that have been qualitatively regulated, but have not been properly implemented. Conclusion. Law enforcement monitoring seems to be one of the most important functions of the authorities at the level of the subject of the federation, because allows you to look at the implementation of legal norms in a different way: not from the position of “everything somehow works and gives some kind of result”, but in the spirit of a true legal state, proclaimed in Art. 1 of the Constitution of the Russian Federation.
ACTUAL PROBLEMS OF MAKING CHANGES TO THE CONSTITUENT DOCUMENTS OF NON-PROFIT ORGANIZATIONS
Authors:   Южно-Российский институт управления – филиал Российской академии народного хозяйства и государственной службы при Президенте РФ, Ростов-на-Дону, Россия, Николай Алексеевич Сармин , Анастасия Сергеевна Дороганова ,   Южно-Российский институт управления – филиал Российской академии народного хозяйства и государственной службы при Президенте РФ, Ростов-на-Дону, Россия
Published: April 2023

The introduction into circulation of voluntary associations of citizens and/or legal entities that do not aim to extract profit as the main one, entailed the need for the development of special legal regulation. The article discusses certain features of the legal status, state registration and amendments to the constituent documents, as well as information in the Unified State Register of Non-profit organizations. The authors conclude that it is necessary to unify the procedure for state registration of legal entities according to the model of registration of commercial organizations.
Prática docente e Educação CTSA: estágio supervisionado em ciências em uma Escola Municipal do interior do estado de São Paulo
Authors: Breviglieri Enrico Lopes , Ganiko-Dutra Matheus
Published: April 2023

Um importante elemento de coerência na formação de professores é a compatibilidade entre aquilo que se aprende na universidade e o que pode ser observado durante os estágios supervisionados, o que nem sempre acontece devido à divergência de teorias adotadas nos cursos de graduação e nas práticas pedagógicas nas escolas. Neste artigo são exploradas as experiências no Estágio Supervisionado com temática da Educação CTSA (Ciências, Tecnologia, Sociedade e Ambiente) e suas interseções com a Pedagogia Histórico-Crítica (PHC). O estágio foi realizado nos 7os e 8os anos do Ensino Fundamental, acompanhando um professor monitor que segue a pedagogia materialista. Durante as observações, foram feitas anotações baseadas em evidências para a análise. O estagiário também realizou uma regência. Foram realizadas uma análise dos resultados do estágio e uma análise da articulação da aula do professor com os eixos da ênfase CTSA. Apesar das diferenças entre a Educação CTSA e a PHC, o professor monitor consegue inserir conteúdos CTSA em suas aulas através de suas explicações e demais atividades. Sobre a regência, foi concluído que permaneceram algumas distorções conceituais, que poderiam ser superadas caso o estagiário fosse responsável por uma sequência de aulas, podendo dar continuidade com o ensino e a aprendizagem.
Roteiros de Aprendizagem como gênero para produção de material didático para o ensino e aprendizagem de Língua Inglesa
Authors: Nascimento Diana Ketlem Paula do , Santos Tamara Afonso dos , Guedes Luiz Eduardo , Moura Sonaira de Araújo
Published: April 2023

O presente estudo tem por objetivo discutir possibilidades de elaboração de materiais didáticos a partir da apresentação do gênero roteiro de aprendizagem (FARIAS, 2019) e análise de um roteiro tomando por base as contribuições teóricas acerca da temática (PAIVA, 2014; RAJAGOPALAN, 2012; SCHEYERL, 2012, entre outros). Assim, fundamentados numa abordagem qualitativa de pesquisa de caráter documental, apresentamos a análise de um roteiro de aprendizagem elaborado por educadores da rede pública e privada de ensino, fundamentados em teorias para o ensino de línguas, produção e análise de materiais didáticos. Os resultados da análise apontam que o gênero roteiro de aprendizagem possui características fundamentais para um material didático como: capacidade de reusabilidade, contextualização, personalização, construção colaborativa, hipertextualidade e a autonomia do professor.
Una mirada histórico-reflexiva al acto educativo
Authors: Rebolledo Cortés Henry Steven , Covaleda Polo Carlos Francisco
Published: April 2023

Este documento nace de las reflexiones de los autores quienes, con sus roles, uno desde la Escuela de Ciencias Sociales Artes y Humanidades y otro desde el Centro de Investigación Acción Psicosocial (CIAPSC), en la UNAD en la zona sur, adelantan una línea de investigación entre la psicología y la pedagogía que pase por una reflexión epistemológica y filosófica crítica. Tiene la intencionalidad dar una mirada al constructo histórico-reflexivo del proceso de enseñanza-aprendizaje, hoy acto educativo, desde esferas filosóficas y psicológicas, desde los distintos modelos educativos y estrategias pedagógicas que se han derivado de estas. En este sentido, en primera instancia se da revisión desde la escolástica, aquella establecida en las escuelas monásticas, que estuvo presente desde el siglo IV hasta el siglo XII. Seguido, se aduce a la postura psicológica conductista, que aparece con el positivismo de la era moderna, la cual se encargaría de observar el comportamiento e interpretarlo; consecuentemente, des-emboca en el surgimiento del enfoque subjetivista que reconoce múltiples miradas y está mediado por la percepción. Finalmente, se reflexionan los modelos educativos importantes como los derivados de las teorías conductistas y cognitivistas, presentan-do nuevas perspectivas desde la teoría crítica de la educación a través de las pedagogías contemporáneas, esperando ver la necesidad de la constitución de un marco de referencia para repensar la educación en articulación con la disciplina psicológica del momento actual.
Financial impact on the labor market in the Balkan countries
Authors: Rexhepi Shaqir , Vataj Gjelosh
Published: April 2023

The purpose of the paper has to do with the level of influence of the labor force on the labor market in the countries of the Western Balkans. Labor force categories of which, age, gender, and education, can affect economic business. What social policies the countries of the Western Balkans have undertaken for the categories with a low level of employment? According to the research, the level of unemployment varies from around 30% to 35%, where the countries of the Western Balkans have constant problems in finding workers with the required qualifications, according to different profiles. From the research data, we found that the biggest shortages are in the production sector and the technical profile, which is also related to the level of professional training. In order to have effective results, in the paper, we used empirical and comparative analysis, of how the workforce in the Balkan countries affects the working business in the business sector for the period 2016–2019. In terms of research, various statistics were analysed, which were related to the causes of labor shortage in the labor market.
Transfer pricing optimization in the developing economy: A tax consultant’s view
Authors: Apriyanti Hani Werdi , Sulaiman Suzana , Jamaluddin Adibah
Published: April 2023

Transfer pricing (TP) is usually used by multinational companies (MNCs) to minimize corporate tax liabilities, using affiliates. This practice involves tax consultants optimizing transfer pricing without violating the tax regulation. Tax consultants contribute to supervising companies to make transparent documentation and transfer pricing policies. This qualitative research explores the tax consultant perspective on companies’ transfer pricing optimization behaviour using planned behaviour theory. Data was collected through interviews, documentation, and observations. This research involves 5 transfer-pricing experts that have experience in transfer pricing issues, in 5 interview sessions. Data triangulation among data sources, written feedback, online interviews, and documentation review was used to ensure validity and reliability. The finding gives an understanding that MNCs in Indonesia optimize transfer pricing by the perception of TP benefit specifically for corporate profit allocation among parties in a different taxation area and tax payment minimization. While business norms, environments, and international regulations of transfer pricing are not fully considered by MNCs in Indonesia. International transfer pricing regulations are not considered the organizational perception of this TP practice. This finding enriches the discussion on the tax consultant perspective, specifically companies’ transfer pricing optimization behaviour to improve guidelines on the TP arm’s length principle (Djaja & Sonny, 2021; Sari, 2021)
Facile synthesis and exfoliation of micro-sized LDH to fabricate 2D membranes towards Mg/Li separation
Authors: Li Biao , Peng Juanjuan , Li Menghan , Yang Zeya , Lu Jun , Han Jingbin
Published: April 2023

Two-dimensional (2D) membranes have demonstrated potential for molecular
separation; however, their applicability for Li/Mg ion separation has
been restricted by their negatively-charged and easily-swellable
properties in water. Moreover, their practical application has been
hindered by the challenge of producing significant quantities of
single-layer nanosheets. To overcome these challenges, we have developed
a scalable method for synthesizing micro-sized nitrate ZnAl layered
double hydroxide (LDH) and subsequent exfoliating to yield monolayer
nanosheets for the construction of 2D membranes. The sub-nanometer
channels of the LDH membrane is positively charged, which prevents the
passage of magnesium ions. These channels also impede the flow of
magnesium ions that are more difficult to dehydrate. As a result, the
LDH membranes exhibit robust lithium-magnesium separation ability, with
a separation ratio of 6 (Li/Mg). This work provides a method for
producing high-quality LDH nanosheets and validates the enormous
potential of LDH membranes in the field of lithium-magnesium separation.
The safety of steel space truss under fire conditions according to the system reliability analysis.
Authors: Kubicka Katarzyna
Published: April 2023

The proposed paper focuses on the method of estimating the reliability
index β (as a safety measure) of the spatial steel truss under fire
conditions. The whole procedure connected with computation of
temperatures of elements, effects of actions and bearing capacities is
realised in author-designed C++ code, prepared according to Eurocode.
The probabilistic model includes mechanical properties of steel (yield
strength), geometrical characteristics of bar cross-sections and effect
of actions. In the next step, the stiffness matrix spectral analysis is
realized. The code prepared by the author is being developed to be
useful for spatial structures. The program realization leads to finding
so called cut-sets, i.e. possible ways of transforming the structure
into mechanism. These sets of elements create a logical model, which
will be introduced to the SYSREL module, which is part of STRUREL
program. This is the software that was created in Munich University of
Technology to solve reliability problems. SYSREL module is dedicated to
conduct system reliability analysis connected with different reliability
methods including, among others, the FORM,SORM, Monte Carlo and Subset
Simulation method.
Solar Wind Control of Hemispherically-Integrated Field-Aligned Currents at Earth
Authors: Fleetham Amy L , Milan Stephen E. , Imber Suzanne Mary , Vines Sarah Kimberly
Published: April 2023

Magnetic reconnection occurring between the interplanetary magnetic
field and the dayside magnetopause causes a circulation of magnetic flux
and plasma within the magnetosphere, known as the Dungey cycle. This
circulation is transmitted to the ionosphere via field-aligned currents
(FACs). The magnetic flux transport within the Dungey cycle is
quantified by the cross-polar cap potential (CPCP or transpolar
voltage). Previous studies have suggested that under strong driving
conditions the CPCP can saturate near a value of 250 kV. In this study
we investigate whether an analogous saturation occurs in the magnitudes
of the FACs, using observations from the Active Magnetosphere and
Planetary Electrodynamics Response Experiment (AMPERE). The solar wind
speed, density and pressure, the Bz component of the interplanetary
magnetic field, and combinations of these, were compared to the
concurrent integrated current magnitude, across each hemisphere. We find
that FAC magnitudes are controlled most strongly by solar wind speed and
the orientation and strength of the interplanetary magnetic field. FAC
magnitude increases monotonically with solar wind driving but there is a
distinct knee in the variation around IMF Bz = -10 nT, above which the
increase slows.
A Transfer Learning Method to Generate Synthetic Synoptic Magnetograms
Authors: Li Xiaoyue , Valliappan Senthamizh Pavai , Shukhobodskaia Daria , Butala Mark D , Rodriguez Luciano , Magdalenic Jasmina , Delouille Veronique
Published: April 2023

Current magnetohydrodynamics (MHD) models largely rely on synoptic
magnetograms, such as the ones produced by the Global Oscillation
Network Group (GONG). Magnetograms are currently available mostly from
the front side of the Sun, which significantly reduces the accuracy of
MHD modeling. Extreme Ultraviolet (EUV) images can instead be obtained
from other vantage points. This study explores the possibility of using
EUV information from the Atmospheric Imaging Assembly (AIA) to directly
generate the input for the state-of-the-art 3D MHD model European
Heliospheric FORecasting Information Asset (EUHFORIA). Towards this
goal, we develop a method called Transfer-Solar-GAN which combines a
conditional generative adversarial network with a transfer learning
approach to overcome training dataset limitations. The source domain
dataset is constructed from multiple pairs of the central portion of
co-registered AIA and Helioseismic and Magnetic Imager (HMI) line of
sight (LOS) full-disk images, while the target domain is constructed
from pairs of portions of AIA and GONG sine-latitude synoptic maps that
we call segments. We evaluate Transfer-Solar-GAN by comparing modeled
and measured solar wind velocity and magnetic field density parameters
at the L1 Lagrange point and along the Parker Solar Probe (PSP)
trajectory which were determined with EUHFORIA using both empirical GONG
and artificial-intelligence (AI)-synthetic synoptic magnetograms as
inputs. Our results demonstrate that the Transfer-Solar-GAN model can
better provide the necessary information to run solar physics models by
EUV information. Our proposed model is trained with only hundreds of
paired image segments and enforces a reliable data division strategy.
An unsupervised learning approach for predicting wind farm power and downstream wakes using weather patterns
Authors: Clare Mariana C A , Warder Simon C , Neal Robert , Bhaskaran B , Piggott Matthew
Published: April 2023

Wind energy resource assessment typically requires numerical modelling,
but this is too computationally intensive for multi-year timescales.
Increasingly, unsupervised machine learning techniques are used to
identify small numbers of representative weather patterns that can help
simulate long-term behaviour. Here we develop a novel wind energy
workflow that for the first time combines the weather patterns from
unsupervised clustering with a numerical weather prediction model (WRF)
to obtain efficient and accurate long-term predictions of wind farm
power and downstream wakes. We use ERA5 reanalysis data and, for the
first time, compare clustering on low altitude pressure and wind
velocity, a more relevant variable for wind resource assessment. We also
compare varying domain sizes for the clustering. A WRF simulation is run
at each cluster centre and the results aggregated into a long-term
prediction using a novel post-processing technique. We consider two case
study regions and show that our long-term predictions achieve excellent
agreement with a year of WRF simulations in 2% of the computational
time. The most accurate results are obtained when clustering on wind
velocity. Clustering over a Europe-wide domain is sufficient for
predicting wind farm power output, but clustering over smaller domains
is required for downstream wake predictions. Our approach facilitates
multi-year predictions of power output and downstream farm wakes, by
providing a fast, accurate and flexible methodology applicable to any
global region. Moreover, this constitutes the first tool to help
mitigate effects of wind energy loss downstream of wind farms, via the
identification of optimum wind farm locations.
Numerical analysis of the contemporary interaction between the Phoenix Metro Area Urban Boundary Layer and the local thermo-topographical circulation
Authors: Brandi Aldo , Georgescu Matei , Salamanca Francisco , Alberto Alberto
Published: April 2023

Anthropogenic modification of natural landscapes to urban environments
impacts land-atmosphere interactions in the boundary layer. Ample
research has demonstrated the effect of such landscape transitions on
development of the near-surface urban heat island (UHI), while
considerably less attention has been given to impacts on regional wind
flow. Here we use a set of high-resolution (1 km grid-spacing) regional
climate modeling simulations with the Weather Research and Forecasting
(WRF) model coupled to a multi-layer urban canopy scheme to investigate
the dynamical interaction between the urban boundary layer (UBL) of the
Phoenix Metro (U.S.) area and the thermal circulation of the complex
terrain it resides within. We conduct paired simulations for the
extremely hot and dry summer of 2020, using a contemporary urban
representation and a pre-settlement landscape representation to examine
the effect of the built environment on local to regional scale wind
flow. Analysis of our simulation results shows that, for a majority of
the diurnal cycle, 1) the thermo-topographical circulation dominates, 2)
the built environment obstructs wind flow in the inertial sublayer
during the nighttime, and (3) the built environment of Phoenix Metro
produces an UHI circulation of limited vertical extent that interacts
with the background flow to modulate its intensity. Such interaction is
modulated by greater daytime urban sensible heat flux and dampens the
urban roughness induced drag effect by promoting a deeper UBL through
vigorous mixing. Our results highlight the need for future research –
both observational and simulation based - into urbanizing regions where
multi-scale flows are dominant.
Towards The Review of Artificial Intelligence Programme Curriculum and Effective Collaborations Among Academia for AI Programme Development in Africa
Authors:   1,2 Department of Computer Science and Information Technology, Igbinedion University Okada, Nigeria. 3Computer Science Department, Federal University of Technology, Minna, Nigeria Corresponding Author’s Email: ask4osas@iuokada.edu.ng, 1Omorogiuwa O. , Ohiagu K. , Lawal K.H.
Published: April 2023

Artificial Intelligence (AI) is an area of Computer Science that emphasizes the creation of intelligent systems that work, reasons and react like humans. In recent times information and computing solutions are leveraged on the concept of Artificial Intelligence with regard to Artificial Neural Network, Machine Learning, Fuzzy logic, Deep learning and Robotic Science. Applications of AI solutions have being highly effective in all sectors of human endeavors. During the Covid 19 pandemic, AI applications resulted in the rapid development and implementation of solutions which ordinarily would have taken years to achieve especially in the area of vaccine. Despite the gains of AI, we realized that less emphasis is placed in this trending area of computer science by the educational systems in Africa especially at university level. This research seeks to demand for an urgent need for a review of our educational curriculum to include AI and other trending disciplines in the frontiers of Information Technology. A multidisciplinary cloud based research model was also formulated which can be adopted in our educational system to foster multidisciplinary research. This will improve quality and efficient research outputs from universities in Africa. Keywords: Artificial Intelligence, Machine learning, academic-collaboration-models, Curriculum Review, AI Applications
Closure operators and connectedness in bounded uniform filter spaces
Authors: Khadim Sana , Qasim Muhammad
Published: April 2023

In this paper, we characterize both closed and strongly closed subobjects in
the category of bounded uniform filter spaces and introduce two notions of
closure operators which satisfy weakly hereditary, idempotent and productive
properties. We further characterize each of Tj (j= 0,1) bounded uniform
filter spaces using these closure operators and examine that each of them
form quotient-reflective subcategories of the category of bounded uniform
filter spaces. Also, we characterize connected bounded uniform filter
spaces. Finally, we introduce ultraconnected objects in topological category
and examine the relationship among irreducible, ultraconnected and connected
bounded uniform filter spaces.
Geometric intersection numbers between multiple and elementary curves on punctured torus
Authors: Dülger Alev
Published: April 2023

We obtain formulas that give the geometric intersection numbers between
multiple curves and elementary curves, which are particular types of multiple
curves, on the punctured torus with boundary by using Dynnikov coordinates.
To do this, we first determine what the elementary curves on this surface
are, and then find separately the formulas that give the number of geometric
intersections of multiple curves with each elementary curve.
A topology on categorical algebras
Authors: Ulualan Erdal , Yılmaz Koray
Published: April 2023

On categorical algebras, we define an idempotent filter as an analogous
version of Gabriel?s. We also construct topologies on 2-crossed modules of
algebras and categorical algebras.
Coverings of local topological groups
Authors: Fulya Akız H.
Published: April 2023

In this paper it is proved that local group structure of a local topological
group which has a universal cover lifts to any covering space.
Intrinsic strong shape of global attractors
Authors: Shekutkovski Nikita , Shoptrajanov Martin
Published: April 2023

We present a proof of the strong shape theorem for global attractors in
compact metric spaces using the intrinsic approach to strong shape from [18]
which combines continuity over a covering and the corresponding homotopies
of second order.
Linearly S-closed spaces
Authors: Singh Gunjan , Prasannan A.R.
Published: April 2023

We introduce the class of linearly S-closed spaces as a proper subclass of
linearly H-closed spaces. This property lies between S-closedness and
countable S-closedness. A space is called linearly S-closed if and only if
any semi-open chain cover posses a member dense in the space. It is shown
that in the class of extremally disconnected spaces the class of linearly
H-closed spaces and linearly S-closed spaces coincide. We gave
characterizations of these spaces in terms of s-accumulation points of chain
filter bases and complete s-accumulation points of families of open subsets.
While regular S-closed spaces are compact there is a non compact, regular,
linearly S-closed space. It is shown that a Hausdorff, first countable,
linearly S-closed space is extremally disconnected. Moreover, in the class
of first countable, regular, compact spaces the notions of S-closedness,
linearly S-closedness and extremally disconnectedness are equivalent. Some
cardinality bounds for this class of spaces are obtained. Several examples
are provided to illustrate our results.
Bifurcation analysis of a predator-prey system with density dependent disease recovery
Authors: Kashyap Ankur , Govaerts Willy , Bhattacharjee Debasish , Sarmah Hemanta
Published: April 2023

The center manifold is an invariant manifold that plays a crucial role in the
bifurcation analysis of dynamical systems. The center manifold existence
theorem assures the local existence of an invariant submanifold of the state
space of a dynamical system around a non-hyperbolic equilibrium point.
Center manifold theory is essential in the reduction of different
bifurcation scenarios to their normal forms. Our study focuses on a
predator-prey interactive system with density-dependent growth in predators
subject to a contagious disease. The disease is assumed to be horizontally
transmitted, and the rate of recovery of the infected predator is assumed to
be density-dependent. At the trivial (zero) equilibrium, the center manifold
is calculated whose dynamical behaviour is similar to that of the original
system. Further, using the center manifolds, the normal form of a Hopf
bifurcation point is determined fromwhich the criticality of the system can
be deduced. Finally, numerical simulations are performed with biologically
plausible parameters to substantiate the analytical findings. Using
numerical continuation methods we detect Generalized Hopf and Zero-Hopf
bifurcation points. We discuss their normal form coefficients, compute their
two-parameter unfoldings and relate these results to the mathematical theory
of codimension two bifurcations.
Dual topologies for the space of multi-functions
Authors: Gupta Ankit , Sarma Ratna
Published: April 2023

Dual topology for the function space topologies for multifunctions are
introduced and investigated. It is found that a topology T on CM(Y,Z) is
splitting (resp. admissible) if and only if its dual pair (T+,T?) is
splitting (resp. admissible). Similarly, the pair (T+,T?) is splitting
(resp. admissible) if and only if its dual T(T+,T?) is splitting (resp.
admissible).
Topological properties of multi-valued functions
Authors: Temizel Gökhan , Karac İsmet
Published: April 2023

In this paper, we generalize properties for single-valued functions in
homotopy theory to multi-valued functions. We present new definitions for
multi-valued functions such as locally m-pathwise connected, m-simply
connected, m-covering space, and regular m-covering space. We apply some
topological properties from algebraic topology to the multi-valued
functions.
The Adaptive sampling revisited
Authors: Drescher Matthew , Louchard Guy , Swan Yvik
Published: April 2023

The problem of estimating the number n of distinct keys of a large collection of N data is well known in computer science. A classical algorithm is the adaptive sampling (AS). n can be estimated by R2 J , where R is the final bucket size and J is the final depth at the end of the process. Several new interesting questions can be asked about AS (some of them were suggested by P.Flajolet and popularized by J.Lumbroso). The distribution of W = log(R2 J /n) is known, we rederive this distribution in a simpler way. We provide new results on the moments of J and W. We also analyze the final cache size R distribution. We consider colored keys: assume also that among the n distinct keys, m do have color K We show how to estimate p = m n. We study keys with some multiplicity : we provide a way to estimate the total number M of some color K keys among the total number N of keys. We consider the case where we know a priori the multiplicities but not the colors. There we want to estimate the total number of keys N. An appendix is devoted to the case where the hashing function provides bits with probability different from 1/2.
Parvo B19 and Anaemia: The Various Profiles – A Mini Review
Authors: AH Shulman
Published: April 2023

Introduction: Parvovirus 19 (Parvo B19) is a single stranded DNA virus which predominantly affects school-aged children, parents of such children and adults who are working in day care centres or schools. Individuals with underlying haemoglobinopathies, haemophilia, immunocompromised, malignancy and pregnancy states are at a higher risk of infection. This virus has been associated with multiple clinical manifestations including erythema infectiosum, arthopathy, fetal cardiomyopathy and hydrops fetalis. However, one of the most significant complications is the anaemia caused in the adult population. This includes pure red cell aplasia and transient aplastic crisis (TAC). Review: Pure red cell aplasia occurs predominantly in patients with immunocompromised states. The aplasia characteristically presents with a chronic or recurrent severe normocytic normochromic anaemia with reticulocytopaenia. The bone marrow reveals an absence of red-cell precursors or with the presence of giant pro-normoblasts with intra-nuclear inclusions. The condition is effectively managed using packed red cell transfusions, based on the degree of anaemia, and with intravenous immunoglobulin at 1g/kg over a period of 2 days or, more preferably, 500mg/kg over 5 days. The majority of patients respond after 1-3 doses. Correction of the underlying patient risk factors is vital. TAC occurs more frequently in patients with underlying red-cell abnormalities. This presents with a one to two week severe anaemia with variable smear and cellular findings varying from microcytic hypochromic to normocytic normochromic. Additionally, there is a reduced reticulocyte percentage and index. Packed red cell transfusion and correction of the underlying risk factor are often sufficient for the management of anaemia. The addition of immunoglobulin administration, 500mg/kg over 5 days, may be needed for patients who are immunocompromised. Conclusion: Parvovirus B19 remains a prevalent and prominent virus associated with multiple medical conditions particularly in immunocompromised states such as that of HIV, as well as erythrocyte disorders. Clinically, the virus has a plethora of presentations, two of which are severe anaemias: transient aplastic crisis and pure red cell aplasia. These conditions may be effectively and successfully managed with intravenous packed red-cell transfusions, intravenous immunoglobulins and by addressing of the underlying patient risk factors.
Biogenic SiO2 Nanoparticle-based Nanofluid for Fines Migration Control
Authors: J Castillo
Published: April 2023

Fines migration in reservoirs has a major impact on the oil industry, causing damage to formations due to micrometric particle mobilization and a consequent reduction in well productivity, thus resulting in significant economic damage. An emerging alternative for solving this problem is the use of nanofluids to mitigate fines migration. Due to their physicochemical properties, the mesoporous nanoparticles present in nanofluids interact with fines in the well, diminishing their mobility without an important decrease in permeability. In this work, the effect of a nanofluid composed of biogenic SiO2 mesoporous nanoparticles on fines migration control was studied. A biogenic mesoporous nanosilica was synthesized from rice husks and dispersed in a fluid composed of a mixture of diesel and xylene. Laboratory core-flooding experiments with crude oil were performed. The compositions of the crude oil and the collected material were measured to determine the changes in the crude oil after it interacted with the nanofluid. Fines production was significantly reduced by the use of the nanofluid. The results showed that 0.4% SiO2 nanoparticle fluid decreased fines migration by up to 60% with a small variation in permeability. The results of the GPC-ICP-HRMS analysis of the crude oil after treatment showed that the nanoparticles adsorbed a fraction of the asphaltenes in the crude oil and served as nucleation centers for the agglomeration of fines, forming larger structures with high porosity and allowing the fines to be retained in the core with a low decrease in permeability.
Improved Scoring of Satisfaction with Life Scale: Scoring of SWLS
Authors:   Indian Statistical Institute, Indian Maritime University, Indian Ports Association, Chakrabartty Satyendra Nath
Published: April 2023

The Satisfaction with Life Scale (SWLS), a 5-item instrument with 7 response-categories per item, measures cognitive judgments of satisfaction with one's life using summative scoring where higher score implies higher life satisfaction. Discrete scores of SWLS using Likert-type items fail to satisfy equidistant property and do not consider distributions of item scores or scale scores. The paper gives an assumption-free method to convert item scores of SWLS to continuous scores following normal distribution and scale score is taken as sum of such normally distributed item scores. The proposed scores avoiding tied-scores facilitate better admissibility of arithmetic aggregation, meaningful comparisons, ranking, classification of individuals, assessment of progress/deterioration across time and undertaking parametric statistical analysis. In addition, it helps to assess changes in successive time-periods for an individual or a group of individuals, drawing of progress-paths and test of significance of progress or deterioration. Normality of proposed scores facilitates finding equivalent scores of several measures of life satisfactions with different scale formats and different score-ranges. Empirical illustration is given with hypothetical data. The proposed method is recommended to enhance the utilization of the SWLS for better measurement of satisfaction with life along with meaningful comparisons and inferences.
O Impacto da pandemia na aprendizagem dos estudantes: Um ensaio sobre o futuro do ensino superior
Authors:   Universidade Autónoma de Lisboa, Santos Antonio Duarte
Published: April 2023

A pandemia da COVID-19 forçou uma mudança na aprendizagem remota e presencial da noite para o dia para a maioria dos alunos do ensino superior, a partir da primavera de 2020. Para complementar as videoaulas e envolver os alunos numa sala de aula virtual, os professores adotaram tecnologias que permitiram mais interatividade e modelos híbridos de ensino online e atividades presenciais. Essas ferramentas mudaram a metodologia, o ensino e a avaliação de feições que podem persistir após a pandemia e eventuais epidemias. Para se envolverem de uma forma mais eficaz com os alunos, as instituições de ensino superior terão de se concentrar em oito dimensões da experiência de aprendizagem. Nesta análise descrevemos os resultados de um estudo das tecnologias de aprendizagem que podem possibilitar aspetos de várias dessas oito dimensões da experiência de aprendizagem online. Existe a necessidade urgente de reeducar as próximas gerações de alunos com ferramentas digitais e fazer uso de práticas e competências digitais. A educação em Comportamento Educacional (CE) é difundida em todo o mundo. Existe algum consenso no campo sobre quais os construtos a medir. Foi determinado no estudo a existência de padrões ou princípios seguidos para o esboço da avaliação e atividades presenciais nos vários níveis de ensino. Essas ferramentas mudaram a aprendizagem, o ensino e a avaliação de maneiras que podem persistir após a pandemia. Ter filhos em idade jovem, adolescente e adulta e no ensino deu para constatar o impacto da pandemia na aprendizagem e no bem-estar dos alunos e dos agregados familiares, professores, responsáveis escolares e comunidades académicas inteiras. Estudantes de todo o mundo estão, em média, oito meses atrasados em relação ao que estariam se não fosse a pandemia. Até 2040, os alunos com o curso superior inacabado devido ao COVID-19 podem custar à economia global US$ 1,6 trilião. Então, qual é o caminho a seguir para os sistemas escolares?
Elecciones 2021 en la Comunidad de Madrid: Movilización del votante de partidos de izquierdas en Telegram
Authors:   Universidad Complutense de Madrid, Fernández Rodríguez Aitor , Varona Aramburu David ,   Universidad Complutense de Madrid
Published: April 2023

Este trabajo analiza la labor de las formaciones políticas PSOE, Más Madrid y Podemos en la red social Telegram durante la campaña de las elecciones autonómicas en la Comunidad de Madrid del martes 4 mayo de 2021. La investigación analiza todos los mensajes publicados en un total de cinco canales (los tres partidos más los canales de los candidatos Mónica García y Pablo Iglesias) para conocer los principales datos cuantitativos acerca del uso de la plataforma: suscriptores, mensajes, uso de enlaces, imágenes, vídeos o emojis. El análisis ha permitido, desde una perspectiva cualitativa, conocer el empleo que hacen los partidos políticos dentro de su estrategia de comunicación política: uso de Telegram, segmentación y adaptación de los mensajes empleados, tono y discurso. Durante el presente análisis se ha trabajado para conocer los usos empleados en esta red social, la estrategia desplegada por cada formación durante las dos semanas de la campaña electoral y los mensajes con los que trataron de cautivar a los votantes.
Structure design and performance analysis of downhole hydraulic decoder
Authors: Fang H. , Zhou X. , Liu Z. , Peng Y. , Wu Y. , Li J.
Published: April 2023

In order to reduce the number of hydraulic decoders and hydraulic control pipelines in hydraulically controlled intelligent wells, reduce production costs and improve oil recovery efficiency, the structural design of ICV control of two hydraulic control pipelines and a single hydraulic decoder for four production layers in the well was completed. By simulating the response law of downhole hydraulic signals and the stress analysis of each structure, the motion equation of the layer selection structure of the hydraulic decoder was established with 4 MPa as the unlocking pressure, and ADAMS was used to complete the dynamic simulation analysis. The variation results of displacement, angle, velocity and acceleration in the process of motion were obtained. Finally, the prototype of the hydraulic decoder was processed by stereo photo curing 3D printing equipment. Two hydraulic pumps were used to press alternately, and the selection of four layers of the hydraulic decoder was realized through two hydraulic control pipelines. The self-locking structure could realize the established function, and there was no interference and stuck between the components, which verifies the effectiveness of the design.
Savoir-Faire: Challenges with Leading Learning in IB Authorized Schools in Japan
Authors: Kameda Quincy
Published: April 2023

The study explores the reception of the new IB evaluation process by several IB authorized Article 1 schools in Japan, and how they responded to the challenges they faced during the implementation of their respective program development plans. The study examines the nature of the learning process that took place during implementation, focusing on the strategies that the schools came up with to overcome the challenges they encountered. The evaluation process introduced by the IB likely presented new and complex challenges to the schools, such as adapting to new evaluation criteria or meeting the expectations of the IB. By examining the responses of the schools to these challenges, the study may offer insights into effective strategies for managing complex educational programs and for implementing new evaluation processes. This information could be useful not only to other IB authorized schools in Japan, but also to educational institutions around the world facing similar challenges.
The Effect of Mathematics Anxiety on Cognitive Failures Among High School Students
Authors: Mosahab Arya
Published: April 2023

The present study examined the effect of mathematics anxiety on cognitive failure among the high school students at Altrincham Grammar School for Boys (AGSB), a selective school in Greater Manchester, UK. A sample of 211 students studying in year 7 to year 11 completed the questionnaires. Regression analyses on the cross-sectional data generated a β value of 0.111 (p=0.031) between mathematics anxiety and the lack of concentration dimension of cognitive failure, demonstrating a mild relationship. The effect of mathematics anxiety on other three cognitive failure dimensions of disrupted motor function, memory loss, and high distractibility were not supported at a significance level of 0.05.
Strengthening Resilience to Fire Disasters through Community Participation in Gikomba Market, Nairobi City County, Kenya
Authors: Ongoro Daniel Juma , Muiya Benard Munyao
Published: April 2023

Fire disasters accounts for 20% of the total disaster in Kenya, with direct property loss estimated at USD 595,715 From 2014 to 2022, a total of 248 fire incidences were reported in Nairobi, about 30 of which occurred in the Gikomba market. Contribution of community in disaster risk mangenet can never be overlooked in disaster resilience building. Even though the concept of multi-stakeholder has been adopted in Kenya, the community's involvement in disaster risk management has always been passive. Therefore, the objective of the study was to determine how the level of fire risk awareness by the Gikomba community affects their participation in disasters risk management. This study was guided by the model of Sense of Community Responsibility (SOCR), Rocha’s community empowerment model, and the theory of margin. A mixed research design was adopted in the study. A stratified random sample was obtained by dividing the Gikomba market population into several homogenous and non-overlapping strata based on the nature of the business. Open-ended questionnaires were administered to collect quantitative data from 384 respondents. On the other hand, the no-probability sampling technique was used through purposive snowball sampling to collect qualitative data through interviews. Key informants were mainly disaster experts drawn from, national, county, and private stakeholders. Quantitative data was analyzed through SPSS (version 26) software, while qualitative data was organized into meaningful and reasonable units that were coded using words or short phrases. The study established that level of community understanding of their involvement in disaster risk management was low since 52% of the respondents believed that disaster risk reduction was the sole duty of the national government or county governments. Therefore, this study recommends that, both national and county governments enact and implement laws that will enhance community participation in disaster risk management programs as part of the stakeholder group in line with the existing multiagency concept of operation. Further disaster risk awareness should be integrated into school curricula to improve disaster awareness at the local level.
Phytochemical Profile and Antibacterial Activity Test of Medicine Plants in Southeast Sulawesi Against Salmonella Typhi YCTC as An Alternative Addition to Substitution Ingredients for Halal Products
Authors: Budikafa Muhammad Jefriyanto , Sahidin  , Rini Hamsidi
Published: April 2023

Phytochemical profile and antibacterial activity test performed on several medicinal plants methanol extracts of plants Keji beling (Strobilanthes crispus BI), Starfruit (Averrhoa bilimbi Linn.), Kangkung (Ipomoea aquatica), Secang (Caesalpinia sappan Linn.) and Jathropa (Jatropha curcas Linn.) existing in the Southeast Sulawesi. Phytochemical screening carried out by TLC method to identify classes of secondary metabolic compounds like alkaloids, flavonoids, tannins, saponins and triterpenoids, while the antibacterial activity test against the bacteria Salmonella typhi YCTC using the agar diffusion method with chloramphenicol as a positive control. The results obtained show that the extract of the roots and leaves of plants of S. crispus yield a diameter of 9 mm and 5 mm clear zone, the extract of the leaves of plants A. bilimbi yield a diameter of 9 mm clear zone, while the extract of the trunks and flowers of C. sappan. plants produce a clear zone diameter of 3,5 mm and 6 mm against the bacteria. extracts from plant parts that have activity against salmonella bacteria can then be further investigated to obtain compounds that have potential as antibacterial and can be used as alternatives as herbal medicinal ingredients in halal products.
Female English Majors’ Perceptions of E-portfolios at Some Saudi Universities
Authors: Nasser Dahmash Jawaher
Published: April 2023

Numerous higher education institutions have been increasingly utilizing e-portfolios to serve multiple purposes. E-portfolios provide a wide range of possibilities for promoting language learning in terms of both the learning processes and the learning outcomes. This study tries to gain insight into the perception of female English majors towards e-portfolios at some Saudi universities. Data were collected from 181 female English majors by means of a web-based questionnaire with items eliciting responses using a five-point Likert-type scale. The questionnaire was adapted from Ritzhaupt, Singh, and Seyferth’s (2008) Electronic Portfolio Student Perspective Instrument (EPSPI). The questionnaire included two domains related to student’s perceptions of e-portfolios as learning and assessment tools. Results indicate that most students have a positive perception of e-portfolios as learning and assessment tools. However, participants expressed neutrality toward some items concerning time spending, group working, errors in assessment, and having some difficulties with e-portfolios. Furthermore, there was no significant difference in perceptions of e-portfolios among students from different universities and levels. These findings promote the use of e-portfolios in English major programs. They also show that the e-portfolios might have a good potential to be part of EFL education.