bluuebunny/crossref_metadata_2025 huggingface dataset:
Water supply and demand in the lower Rio Bravo/Rio Grande basin: The irrigated agriculture scenario
Authors: Návar José
Published: April 2023

El manejo convencional de los recursos hidrológicos no puede sustentar el desarrollo en la cuenca baja del Rio Bravo/Rio Grande. Proyecciones a largo plazo del suministro y demanda del agua proveen información para planear el manejo sustentable de los recursos hidrológicos. Cuatro escenarios se estudiaron para proyectar Ia disponibilidad y el suministro del agua en Ia parte mexicana de la cuenca baja del Río Bravo/Río Grande: (i) desarrollo de la infraestructura para el aprovechamiento de las aguas del rio Conchos, (ii) sequia histórica, (iii) hidrología normal y (iv) Ia presencia simultanea de (i) y (ii). El área agrícola de riego podría ser más variable, con pérdida de superficie agrícola irrigada en el distrito 025 de México de la cuenca baja del Río Bravo/Rio Grande, por la creciente demanda del agua en los sectores doméstico, industria, municipal y comercial de los municipios fronterizos del Rio Bravo/Río Grande, magnificado por la sequía y el desarrollo en infraestructura para el aprovechamiento de las aguas del rio Conchos.doi: sin doi
Fractal and cumulative trace analysis of wire-line logs from a well in a naturally fractured limestone reservoir in the Gulf of Mexico
Authors: Arizabalo Rubén Darío , Oleschko Klavdia , Korvin Gabor , Ronquillo Gerardo , Cedillo-Pardo Esteban
Published: April 2023

Hemos demostrado que los registros de pozo medidos en un yacimiento carbonatado naturalmente fracturado tienen un carácter fractal, estando sus parámetros fractales correlacionados con las propiedades petrofísicas de los depósitos. Los registros de porosidad neutrón, densidad, rayos gamma, tiempo de transito de Ia onda P y resistividad somera y profunda, se relacionaron bien con cinco estratos: Jurasico Superior Tithoniano y Kimmeridgiano (JST, JSK), Cretácico Superior, Medio e Inferior (KS, KM, KI). Cada una de estas capas tiene dimensiones fractales diferentes. Utilizando el software BENOIT se ajustaron las trazas de los registros como movimientos Brownianos fraccionarios (fBm) obteniéndose dimensiones fractales promedio para el registro de porosidad D=l.70 (KS), D=1.66 (KM), D=1.75 (KI), D=1.84 (JST), D= 1.67 (JSK). Establecemos que la geometría fractal de los poros controla las fluctuaciones y dimensiones fractales de los registros en cada unidad geológica. El análisis de las trazas acumuladas ha proporcionado una mejor comprensión del sistema, incluyendo las cinco unidades principales.doi: sin doi
Application of SINTACS method to the aquifers of Piana di Palermo, Sicily, Italy
Authors: Cusimano G.
Published: April 2023

Piana di Palermo es caracterizada por la presencia de dos acuíferos diferentes: uno somero constituido por calcarenitas y otro profundo en rocas carbonatadas fracturadas. El acuífero calcarenítico presenta un bajo potencial hídrico comparado con el acuífero carbonatico. El comportamiento químico del agua en ambos acuíferos refleja severos procesos como interacción agua-roca, intrusión marina. cambio iónico, etc. La aplicación del método SINTACS mostró que cerca del 80 % del área en estudio puede ser clasificada como de alta a muy alta vulnerabilidad.doi: sin doi
Foreword
Authors: Macías José Luis , Espíndola Juan Manuel
Published: April 2023

La erupción del volcán El Chichón en 1982 ha sido el peor desastre de origen volcánico en la historia de México. Aún no se ha cuantificado el número de muertos que asciende a miles y la destrucción de bienes. Aún más difícil de evaluar es el sufrimiento de las personas que eludieron la muerte pero soportaron las secuelas: aquellas cuyas vidas fueron profundamente perturbadas y vieron dispersas a sus comunidades.doi: sin doi
IRIS-Based Human Identity Recognition with Deep Learning Methods
Authors: Anithakarthi Dr. , M Dharani , P Bindu Sri , V Monika , M Sailaja
Published: April 2023

Abstract: One of the most important computer system modules is the one in charge of user security. It has been demonstrated that simple logins and passwords cannot provide high efficiency and are simple for hackers to crack. The popular substitute is identity identification using bio-metrics. Iris as a biometric characteristic has attracted increased attention in recent years. It was brought on by the high efficiency and precision this quantifiable aspect ensured. Throughout the literature, the effects of this curiosity can be seen. Several authors have put forth a variety of various approaches. This paper describe methods for an irisbased algorithm for recognizing human identity. Artificial neural networks (ANN) and a CNN-based transfer learning model (Mobile-net) were employed in the classification process. Once the output has been categorized, the iris component is segmented using a process called segmentation. Tests that have been run have demonstrated that the suggested procedure can produce results that are adequate.
Design and Prototyping of Micro Mobility Electric Vehicle
Authors: Surani Piyush , R Parmar Urmish. , Dhameliya Parth , Kapuriya Harish
Published: April 2023

Abstract: The design and development of a micro mobility electric vehicle are detailed in this work. Since the last ten years, gasoline prices have increased in India, and air pollution is a major global concern. The majority of the city's air pollution comes from traditional power plants, but the vehicles that are driven around the populous areas also add to the problem. As the amount of green space in major cities is drastically decreasing, tiny mobility electric vehicles are becoming more and more popular as a form of urban transportation. Small, ultra-lightweight electric vehicles with long ranges may be the preferred mode of transportation. Due to growing concerns over issues including fuel prices, pollution, and increased traffic, electric vehicle (ev) are gaining popularity , as a vehicle an ev is quiet easy to operate and does not have the fuel costs associated with conventional vehicles, it is highly useful electric scooters work simply when the rider uses throttle , electric signals go from the throttle through wires to the controller , which instructs the battery to release electric energy to one or two motor in the wheels. the motor transforms that energy into a movement of the wheels , and the ev moves forward. Most of the component of system are either electric or electronic which are almost maintenance free for long duration. In the presented paper, the authors tried to prototype the concept that reduces overall cost of the vehicle with higher range of operation and with moderate speed such that the daily commuters in the city are benefited.
QT interval analysis in individuals with idiopathic mitral valve prolapse
Authors: Jasim Riyadh Abdullah , Hassan Alaa Yousif , Shadhar Sabah Abed
Published: April 2023

Objectives: The goals of the study are to determine whether or not there is a correlation between the QT interval and IMVP, to provide an explanation for sudden cardiac death in some cases, and to show how IMVP symptoms are linked to certain arrhythmias.

Methods: QTC intervals were measured in 43 patients with idiopathic mitral valve prolapse (11 men and 32 women with mean age 46±17 years). All patients underwent a clinical and echocardiographic examination, and ECG taking to assess the incidence of long QT in patients with IMVP.

Results: The data show that 36 of the 43 patients with IMVP have a prolonged QT interval, while only 2 of the 38 patients in the control group have. There was also an uptick in arrhythmia cases when the QT interval was prolonged.

Conclusion: Individuals with IMVP have an increased risk of arrhythmias, and this risk is even greater in patients with very long QT, which can cause life-threatening ventricular arrhythmias, as shown by this study.
Matrix concentration inequalities and efficiency of random universal sets of quantum gates
Authors: Dulian Piotr , Sawicki Adam
Published: April 2023

For a random set S⊂U(d) of quantum gates we provide bounds on the probability that S forms a δ-approximate t-design. In particular we have found that for S drawn from an exact t-design the probability that it forms a δ-approximate t-design satisfies the inequality P(δ≥x)≤2Dte−|S|xarctanh(x)(1−x2)|S|/2=O(2Dt(e−x21−x2)|S|), where Dt is a sum over dimensions of unique irreducible representations appearing in the decomposition of U↦U⊗t⊗U¯⊗t. We use our results to show that to obtain a δ-approximate t-design with probability P one needs O(δ−2(tlog⁡(d)−log⁡(1−P))) many random gates. We also analyze how δ concentrates around its expected value Eδ for random S. Our results are valid for both symmetric and non-symmetric sets of gates.
Finite-rate sparse quantum codes aplenty
Authors: Tremblay Maxime , Duclos-Cianci Guillaume , Kourtis Stefanos
Published: April 2023

We introduce a methodology for generating random multi-qubit stabilizer codes based on solving a constraint satisfaction problem (CSP) on random bipartite graphs. This framework allows us to enforce stabilizer commutation, X/Z balancing, finite rate, sparsity, and maximum-degree constraints simultaneously in a CSP that we can then solve numerically. Using a state-of-the-art CSP solver, we obtain convincing evidence for the existence of a satisfiability threshold. Furthermore, the extent of the satisfiable phase increases with the number of qubits. In that phase, finding sparse codes becomes an easy problem. Moreover, we observe that the sparse codes found in the satisfiable phase practically achieve the channel capacity for erasure noise. Our results show that intermediate-size finite-rate sparse quantum codes are easy to find, while also demonstrating a flexible methodology for generating good codes with custom properties. We therefore establish a complete and customizable pipeline for random quantum code discovery.
El enigma ontoepistemológico de la consciencia. Acerca del transhumanismo y la analogía computacional del cerebro
Authors: Sierra Carlos Hugo
Published: April 2023

El propósito principal de este artículo es presentar un análisis crítico sobre algunos de los planteamientos epistemológicos y filosóficos más destacados que se han elaborado desde el transhumanismo contemporáneo en relación con la actividad anatómico-funcional del cerebro y a la naturaleza de la consciencia. Desde ese punto de vista, se pretende considerar si el modelo hermenéutico tecnológico-instrumental que se promueve desde los planteamientos de la corriente transhumanista supone una variante comprensiva alternativa a la hora de dilucidar la complejidad ontoepistemológica de la consciencia. Para ello, se lleva a cabo una exploración sobre el modo en que el transhumanismo se ha centrado en ciertos campos tecnocientíficos para desarrollar una prospectiva concreta asociada a las potencialidades cognitivas del ser humano. En ese sentido, se toma en consideración ciertos avances concretos de la neurotecnología de vanguardia y de la neuromodulación artificial (implantología neural, dispositivos neuromórficos, reprogramación neuronal, cultivo controlado en laboratorio de cerebroides, etc.), así como de la inteligencia artificial. De este análisis se desprende un profundo escepticismo en torno a la posibilidad de que el enfoque transhumanista ofrezca un modelo prometedor para abordar exitosamente el antiguo problema de la relación mente-cerebro, ya que, pese al atractivo de algunas de sus especulaciones más audaces en torno a la condición bioantropológica del hombre y de la ontología de lo real, ha optado por actualizar una visión reduccionista y fisicalista de la mente humana.
COVID-19 disruptions and pivoting in SMEs in the hidden middle of Kenya’s potato and fish value chains
Authors: Naziri Diego , Belton Ben , Loison Sarah Alobo , Reardon Thomas , Shikuku Kelvin Mashisia , Kaguongo Wachira , Maina Kelvin , Ogello Erick , Obiero Kevin
Published: April 2023

Small and medium enterprises (SMEs) in Kenya were severely affected by the COVID-19 pandemic and restrictions put in place to contain it. This study assesses the impact of these restrictions on the midstream of the potato and fish value chains, with a focus on traders and processors, and investigates the short- and longer-term responses and ‘pivoting’ strategies deployed by these firms. Longitudinal data were collected from 937 respondents with three recall periods: (1) the pre-pandemic situation (2019); (2) the period of strictest restrictions, necessitating immediate adaptations by firms (2020); and (3) a period of anticipated recovery with longer-term business adaptation strategies (2021). Firms in both value chains reported a dramatic drop in turnover in 2020. Potato SMEs partially recovered in 2021, but fish SMEs reported further declines in turnover. In the face of restrictions, SMEs shifted toward more localized procurement and sales, shorter supply chains (often by-passing intermediaries and increasing use of contracts), use of smaller vehicles, and toward the adoption of information and communication technology (ICT) to search for and engage with business partners. Smaller firms and the biggest of businesses were more resilient and less subject to large fluctuations in business turnover, suggesting an inverted U-shape relationship between firm size and impact. Firms located close to production areas and selling primarily within their own county were also less affected. We provide recommendations for increasing business resilience to shocks based on these findings.
Exploring how EU agri-food SMEs approach technology-driven business model innovation
Authors: Pellegrini Giustina , de Mattos Camila Silva , Otter Verena , Hagelaar Geoffrey
Published: April 2023

The EU agri-food sector, which is mainly composed of small and medium-sized enterprises has become more demanding in terms of technological inputs to reduce costs, improve the added value of food products, achieve sustainability issues, or address new market opportunities. The introduction of new technologies poses challenges for SMEs that lack the resources and time to cope with the technological transformation, which involves not only the assimilation of new technology in organizational processes but also business model innovation. In this context, this research aims to empirically explore the paths of agri-food SMEs engaged in the technological transformation process, based on the drivers and barriers, as well as the strategies used by these companies to overcome these barriers. In-depth semi-structured interviews with 14 EU agri-food SMEs were conducted and analysed using a combination of deductive pattern-matching and inductive approach. Based on similarities in terms of drivers, barriers, and strategies, seven main groups were identified to draw the paths of the technological transformation process for agri-food SMEs. Findings reveal that there is one common strategy that is adopted by all 14 companies, namely the employment of different types of partnerships and collaborations that allow companies to successfully enter new markets. The study contributes to the literature on technology transformation related to the agri-food sector, by proving insights into how EU agri-food SMEs cope with this process.
El impacto de las ciencias humanas y sociales en el desarrollo científico de Colombia
Authors: Jiménez García Williams Gilberto
Published: April 2023

El actual capítulo ofrece una reflexión sobre el impacto de las ciencias sociales y las ciencias humanas en el desarrollo científico de Colombia, tanto en su crecimiento como en su calidad, de forma que se justifique la creación de un doctorado en este campo científico. Para el desarrollo de la pregunta orientadora se utilizaron diversas herramientas como: análisis estadístico de descriptivo la producción de las ciencias sociales y ciencias humanas en la producción científica del país; y el análisis del im-pacto de la inversión de Minciencias en las ciencias sociales, mediante un análisis bi-variado de regresión. Se concluyó que las ciencias sociales son el campo científico que mayor impacto tiene en SNCTI debido a la relación directa entre la inversión de Minciencias y el crecimiento y la productividad de este campo científico, a su vez, las CH son el campo científico con mayor crecimiento relativo en los últimos 3 años.
Stimulating achievements: The mediating effect of employee commitment between high-performance work practices and employee engagement
Authors: Arubayi Damaro Olusoji , Odiri Vincent I. O.
Published: April 2023

Drawing on the social exchange paradigm, this study evaluated the mediating effects of employee commitment (EC) in the relationship between high-performance work practices (HPWP) and employee engagement (EE) in Nigeria. The study used the social exchange theory and this paradigm has been previously used in the works of Blau (1964), Gouldner (1960), and Settoon et al. (1996). The study adopts a cross-sectional survey research design via questionnaire administration. Three employee engagement (vigor, dedication and absorption) and employee commitment (affective, normative and continuance) dimensions, and six high-performance work practices (employee selection process, motivational compensation, job and work design, participative decision-making, information sharing, and training/development) were employed. Data collected from one hundred and sixty-eight employees in selected ministries in Delta State were analyzed via structural equation modeling (SEM). Results showed that engagement positively affects high-performance work practices. The result also indicated that employee commitment mediated the influence of high-performance work practices on employee engagement. The results further suggest that affective commitment does not mediate the link between vigor and high-performance work practices. Notably, the theoretical and managerial inferences have been methodically discussed in this paper.
Fintech and financial sector performance in Saudi Arabia: An empirical study
Authors: Al-Matari Ebrahim Mohammed , Mgammal Mahfoudh Hussein , Senan Nabil Ahmed Mareai , Kamardin Hasnah , Alruwaili Talal Fawzi
Published: April 2023

Globally, the Fintech industry has grown in importance as a means of staying ahead of changes in the financial sector. This study aims to assess the influence of Fintech on Saudi Arabia’s finan-cial corporate performance. The sample of the study is the financial service industry comprising banks and insurance companies. Data are gathered from the annual reports and DataStream for the years from 2014 to 2021. Banks and insurance companies make up the bulk of the financial ser-vices industry, which serves as a good representative sample. The associations between the in-dependent and dependent variables in five models are examined using ordinary least squares (OLS) and feasible generalized least squares (FGLS) regressions. The results reveal that Fintech has a positive impact on corporate performance. The results of additional tests are consistent with the main findings. We contributed to the literature and associated theories by shedding light on the impact of fintech on the financial sector. The findings have ramifications for a wide range of parties. Researchers can utilize the study and findings to learn more about Fintech in the context of Saudi Arabia, which stands for the Gulf region and the Arab World.
Phenotypic divergence in an island bee population: Applying geometric morphometrics to discriminate population-level variation in wing venation
Authors: Ostwald Madeleine , Thrift Charles , Seltmann Katja
Published: April 2023

Phenotypic divergence is an important consequence of restricted gene
flow in insular populations. This divergence can be challenging to
detect when it occurs through subtle shifts in morphological traits,
particularly in traits with complex geometries, like insect wing
venation. Here, we employed geometric morphometrics to assess the extent
of variation in wing venation patterns across reproductively isolated
populations of the social sweat bee, Halictus tripartitus. We
examined wing morphology of specimens sampled from a reproductively
isolated population of H. tripartitus on Santa Cruz Island
(Channel Islands, Southern California). Our analysis revealed
significant differentiation in wing venation in this island population
relative to conspecific mainland populations. We additionally found that
this population-level variation was less pronounced than the
species-level variation in wing venation among three sympatric congeners
native to the region, Halictus tripartitus, Halictus
ligatus, and Halictus farinosus. Together, these results provide
evidence for subtle phenotypic divergence in an island bee population.
More broadly, these results emphasize the utility and potential of wing
morphometrics for large-scale assessment of insect population structure.
Allergy to stings and bites from rare or locally important arthropods: worldwide distribution, available diagnostics, and treatment
Authors: Arzt-Gradwohl Lisa , Sturm Gunter , Boni Elisa , Antolin-Amerigo Dario , M.Beatrice Bilo , Breynaert Christine , Fassio Filippo , Spriggs Kymble , Vega Arantza , Ricciardi Luisa , Hemmer Wolfgang
Published: April 2023

Insect venom allergy is the most frequent cause of anaphylaxis in Europe
and possibly worldwide. The majority of systemic allergic reactions
after insect stings are caused by Hymenoptera and among these, vespid
genera induce most of the systemic sting reactions (SSR). Honey bees are
the second leading cause of SSR. Depending on the global region, other
Hymenoptera such as different ant genera are responsible for SSR. Widely
distributed hornets and bumblebees or local vespid or bee genera rarely
induce SSR. Hematophagous insects such as mosquitoes and horse flies
usually cause (large) local reactions while SSR occasionally occur. This
position paper aims to identify either rare or locally important insects
causing SSR as well as rarely occurring SSR after stings or bites of
widely distributed insects. We summarized relevant venom or saliva
allergens and intended to identify possible cross-reactivities between
the insect allergens. Moreover, we aimed to locate diagnostic tests for
research and routine diagnosis, which are sometimes only regionally
available. Finally, we gathered information on disposable
immunotherapies. Major allergens of most insects were identified, and
cross-reactivity between insects was frequently observed. While some
diagnostics and immunotherapies are locally available, standardized skin
tests and immunotherapies are generally lacking in rare insect allergy.
Deadlock Prevention Policy for Automated Manufacturing Systems with Multiple Unreliable Resources Based on Resource-Oriented Petri Nets
Authors: lu xueqin , Liu Wei
Published: April 2023

Automated manufacturing systems (AMSs) use a limited set of resources to
process multiple parts simultaneously. Inappropriate resource allocation
may lead to deadlocks in AMSs. Deadlocks can cause some parts to never
be finished, resulting in enormous economic losses. To this end, this
work extends the existing models of resource-oriented Petri nets (ROPNs)
to establish special resource marked graphs (SRMGs). In contrast to
existing deadlock prevention strategies, A-structures are proposed to
represent a special kind of deadlock caused by the inability to complete
assembly operations. To simplify the structure of the supervisor, the
subset of saturable structures is found based on the inclusion and
coverage relation. By designing controllers for each structure in this
subset and central hazard structures, the supervisor for the entire
system is obtained. It can prevent SRMGs from reaching unsafe markings.
Then, resource buffer subnets are added for SRMGs to resolve blocking
issues. This can ensure that parts requiring failed resources will not
affect the normal production of other parts. Eventually, an example is
given to illustrate the application prospect and performance of the
method.
On Hurwitz stability for families of polynomials
Authors: Villafuerte-Segura Raúl , Oaxaca Guillermo , Hernández Baltazar
Published: April 2023

The robustness of a linear system in the view of parametric variations
requires a stability analysis of a family of polynomials. If the
parameters vary in a compact set A, then obtaining necessary and
sufficient conditions to determine stability on the family F A is one of
the most important tasks in the field of robust control. Two interesting
classes of families arise when A is a diamond or a
box of dimension n+1. These families will be denoted by F
D n and F B n , respectively. In this paper a study is presented to
contribute to the understanding of Hurwitz stability of families of
polynomials F A . As a result of this study and the use of classical
results found in the literature, it is shown the existence of an
extremal polynomial f ( α ∗ , x ) whose stability determines the
stability of the entire family F A . In this case f ( α ∗ , x ) comes
from minimizing determinants and sometimes f ( α ∗ , x ) coincides with
a Kharitonov’s polynomial. Thus another extremal property of
Kharitonov’s polynomials has been found. To illustrate the
versatility/generality of our approach, this is addressed to families
such as F D n and F B n , when n≤5. Furthermore, the study is
also used to obtain the maximum robustness of the parameters of a
polynomial. To exemplify the proposed results, first, a family F D n is
taken from the literature to compare and corroborate the effectiveness
and the advantage of our perspective. Followed by two examples where the
maximum robustness of the parameters of polynomials of degree 3 and 4
are obtained. Lastly, a family F B 5 is proposed whose extreme
polynomial is not necessarily a Kharitonov’s polynomial.
Investigating the Space Weather Impact of the 2003 Halloween Geomagnetic Storm by the Ground Magnetic Field Variations: a Global View
Authors: Hu Hongyi
Published: April 2023

Space weather is the phenomenon of solar storms and other events in
space that can have impacts on Earth. They are a major concern for power
grids which can be severely damaged by geomagnetic field variations
during such natural phenomena. To reduce such impact and the possible
consequences following, the study aims to determine how the storm’s
impact spreads across the Earth during a strong event, the October 29th,
2003 Halloween Storm. The impact of the Halloween Storm is analyzed by
using global maps of geomagnetic variations to find where it is received
and how it propagated. Cross-correlation is done on specific latitudinal
and longitudinal distributed chains. The maps show that impacts are
received first in high-latitude regions and then propagate toward mid-
and low-latitude regions. The regions of impact during the first storm
are on the magnetic dayside while the second storm is on the magnetic
night side. The cross-correlation study shows that localized patterns
occur more in the high-latitude regions with more intensive impacts,
such as Norway, Finland, Sweden, Russia, and Canada. Global patterns
occur more in the mid and equatorial regions with less intensive
impacts. The mid-latitude countries such as France, UK, and the US can
also be impacted during extreme events. The visualization package is
developed and available to researchers and the industry. The global view
of space weather impacts can help us to understand and mitigate the
hazardous impacts on modern society.
Influence of Er3+ doping on the mechanical and thermophysical properties of (ErxY1-x)3Al5O12 ceramics
Authors: Wang Xuanli , Xing Jinxin , Xie Min , Mu Rende , Song Xiwen
Published: April 2023

In this work, Er3+ was selected to replace Y3+ in the yttrium aluminium
garnet (YAG) in order to improve its mechanical and thermophysical
properties. A series of (ErxY1-x)3Al5O12 (x = 0, 0.1, 0.3, 0.5, 0.7, 0.9 and
1.0) ceramics were prepared by solid-state synthesis method at 1000 ?C and
finally sintered at 1600 ?C for 5 h. The microstructure and morphology of
the prepared ceramics were investigated. The results showed that all Er3+
doped Y3Al5O12 ceramics exhibited single garnet-type YAG phase and good
compactness. With the increase of Er3+ doping concentration, the thermal
conductivity of the (ErxY1-x)3Al5O12 ceramics decreased slowly and then
increased subsequently. Among the investigated specimens, the
(Er0.7Y0.3)3Al5O12 had the lowest thermal conductivity (1.51W/m?K, at 1000
?C), which was about 28% lower than that of the pure YAG (2.1W/m?K, at 1000
?C). As the Er3+ doping concentration increased, the thermal expansion
coefficient of the (ErxY1-x)3Al5O12 ceramics hardly changed, remaining
around 9.08 ? 10?6 K?1 at 1200 ?C. Moreover, when the Er3+ doping
concentration exceeded 0.5, the mechanical properties of the
(ErxY1-x)3Al5O12 ceramics increased suddenly. Specifically, the hardness
increased from 14.28 to 16.53GPa and the bending strength increased from
231.74 to 324.49MPa.
Comments on the paper “Structure, electric and dielectric properties of PbFe1/3Ti1/3W1/3O3 single perovskite compound” by P.G.R. Achary, R.N.P. Choudhary, S.K. Parida, published in Processing and Application of Ceramics 14 (2020) 146-153
Authors: Tomaszewski Paweł
Published: April 2023

My comments concern the errors in the crystallographic part and possible
misconduct of the authors of the commented paper regarding their usage of
the same SEM image in different subsequent works. Moreover, the true
chemical composition of the studied sample is questionable since the authors
claim different systems for the same SEM micrograph in five different papers
mentioned here.
A stochastic inventory model with price-sensitive demand, restricted shortage and promotional efforts
Authors: Khedlekar Uttam , Kumar Lalji , Keswani Mamta
Published: April 2023

This paper is attempt to develop a stochastic inventory model with quadratic price-sensitive demand. Objective function is developed by incorporating promotional efforts to boost the market demand, preservation technology to reduce the rate of deterioration, proportionate shortage time and partial backloggings. The proposed work is to generalise the stochastic demand with different probability distributions and their comparisons. The objective is to find the optimal price, optimal replenishment, and optimal preservation technology investment while optimizing the total profit per unit time. In the case of partial backlogging and lost sale, we deduced the optimal replenishment schedules for respective price and preservation technology cost. Also, we shown analytically and graphically that the total profit per unit time is a concave function with respect to per unit time, price, and preservation cost. The theoretical implications have been validated by useful results and numericals. Also, we examine the impact of various parameters for the best course of action. The conclusions drawn from the assessment might be useful for managerial purposes.
Decision making model for detecting infected people with COVID-19
Authors: Mahmood Sahar
Published: April 2023

The detection of people that are infected with COVID-19 is critical issue due to the high variance of appearing the symptoms between them. Therefore, different medical tests are adopted to detect the patients, such as Polymerase Chain Reaction (PCR) and SARS-CoV-2 Antibodies. In order to produce a model for detecting the infected people, the decision-making techniques can be utilized. In this paper, the decision tree technique based Decisive Decision Tree (DDT) model is considered to propose an optimized decision-making approach for detecting the infected people with negative PCR test results using SARS-CoV-2 antibodies and Complete Blood Count (CBC) test. Moreover, the fever and cough symptoms have been adopted as well to improve the design of decision tree, in which the precision of decision is increased as well. The proposed DDT model provide three decision classes of Infected (I), Not Infected (NI), and Suspected (S) based on the considered parameters. The proposed approach is tested over different patients? samples in off and real-time simulation, and the obtained results show a satisfactory decision class accuracy ratio that varies from 95% to 100%.
Multi-server Markovian heterogeneous arrivals queue with two kinds of working vacations and impatient customers
Authors: Yohapriyadharsini R.S. , Suvitha V.
Published: April 2023

This paper deals with multi-server queueing system with two kinds of Working Vacations (WVs) and impatient customers. A random timer is started whenever a customer comes into the system. The customer may abandon the system if the service is not completed before the impatience timer expires. Each time after serving all the customers, the system becomes empty and then the server begins 1st kind of vacation. On returning from 1st kind of WV, the server begins 2nd kind of WV whenever a system has no customers. When the server comes back from either 1st kind or 2nd kind of WV, if there is at least one customer in the system, the server switches to busy period. The steady state probabilities have been derived using the Probability Generating Functions (PGFs) method. Various measures of performance are presented and numerical illustrations are also provided.
Diskurser om skrivande i styrdokument för svenska som andraspråk på grundläggande och gymnasial nivå inom vuxenutbildning
Authors: Palm Clara
Published: April 2023

Ämnet svenska som andraspråk syftar till att ge elever den språkliga beredskap som krävs för att få tillgång till studie-, yrkes-, samhälls- och vardagsliv i Sverige. Centralt är därför att utveckla en allsidig skriftspråklig kompetens. I den här artikeln undersöks vilka diskurser om skrivande som återfinns i de läro-, kurs- och ämnesplaner som reglerar ämnet svenska som andraspråk inom vuxenutbildning. Materialet analyserades med hjälp av Ivaničs (2004) diskursanalytiska verktyg. Resultaten visar att det trots skrivandets allt större betydelse i samhället är få delar i styrdokumenten som explicit rör skrivande. Totalt sett återfanns fler diskurser på grundläggande än på gymnasial nivå, men det är begränsat till ett fåtal diskurser. Analysen indikerar att ämnet omgärdas av en övergripande nyttodiskurs på gymnasial nivå, där skrivandet framför allt ska komma eleven till gagn i ett vidare akademiskt studieliv. På båda nivåer ges individens egna mål med skrivandet ett begränsat utrymme, liksom skrivande för kreativa syften. Ett kritiskt perspektiv i relation till skrivande saknas. På gymnasial nivå har skrivande för vardags- och samhällsliv därutöver en nedtonad betydelse. Artikeln föreslår att en bred skrivundervisning med tydligare vägledning i såväl styrdokumentens ämnesinnehåll som betygskriterier kan öka förutsättningarna för elever att utveckla en hög skriftspråklig kompetens.
ENGLISH ABSTRACT
The discourses of writing in the syllabus of Swedish as a second language at secondary and upper secondary levels within the municipal Swedish adult education
This study set out to investigate what discourses of writing dominate the syllabus of Swedish as a second language at secondary and upper secondary levels within the municipal adult education in Sweden. The material was analyzed using Ivanič’s (2004) discourse analytical framework. The results show that writing is given limited space in the syllabus. Although, in total, more discourses were found at the secondary than at the upper secondary level. The analysis indicates that the subject is surrounded by an overall discourse of usefulness, especially at upper secondary level, where writing above all should benefit the student for future studies and a professional life. The individual’s own goals with writing are secondary, as well as writing for creative purposes. A critical perspective in relation to writing is also lacking. This article proposes that the syllabus should give writing a greater space with clearer guidance in both subject content and knowledge requirements to provide students with conditions to develop a high level of written language competence.
Etterkommere av innvandrere i arbeidslivet – en bourdieusk klasseanalyse
Authors: Kaasa Jorunn , Slettebak Marie Holm
Published: April 2023

The long-term effect of immigration will be determined by how descendants of immigrants fare. In this chapter, we use individual-level register data to compare the class position of descendants (aged 30–40) of immigrants from Pakistan, India, Morocco and Turkey with the population without immigrant background. Using a Bourdieusian class scheme, we contribute to the literature by studying class horizontally (cultural vs. economic capital) as well as vertically. We find that in the vertical class hierarchy, there are relatively small differences between employed descendants and the remaining population. This suggests that descendants are successfully integrated into the class structure. There are, however, clear horizontal class differences, as descendants are underrepresented in the cultural classes. This can partly be explained by descendants’ educational choices. We discuss possible reasons for this inequality and its implications.
Reproduktive reiser: Om å begrepsfeste et grensekryssende fenomen
Authors: Stuvøy Ingvill
Published: April 2023

People are currently crossing borders and jurisdictions in search of ways to have the child they desire and to become parents. The question this chapter deals with is how we are to make sense of this reproductive traveling. Is it a case of consumerist tourism, where people combine vacation with infertility treatment, or are we dealing with a phenomenon of people in need of medical care but not getting it in their home countries? The argument posed here is that how we conceptualize this reproductive traveling matters for what we see – and the kind of knowledge we bring about. This is of significance in a world of not only increased mobility but also new type of relations: between those who travel in search of reproductive assistance and those who come to assist them.
«Du må bare leve med det» – om strukturelle føringer, handlingsrom og strategier blant sesongmigranter i landbruket
Authors: Sæther Inga
Published: April 2023

Agricultural seasonal labour is associated with long hours, physically demanding work, and low wages, and is mostly performed by labour migrants. The macro structures that shape seasonal migrants’ experiences are mostly constructed to fit employers’ needs for flexible working hands, and thus contribute to the marginalisation of seasonal migrants. This chapter discusses the ways in which seasonal migrants express their agency by way of resilience, reworking, and resistance within a system of marginalising structures. Based on a qualitative study of seasonal migrants working at a Norwegian fruit and berry farm, I analyse the different ways in which seasonal migrants display agency within the realms of work, social relations, and housing conditions. The analysis shows how resilience at times is used as a coping strategy in day-to-day-life, and at other times as a way of working to improve conditions in the longer run.
Teacher Strategies and Student Preferences in Overcoming Disruptive Behavior of Elementary School Students
Authors: Khotimah Nur , Endang Fauziati  , Choiriyah Widyasari  , Minsih
Published: April 2023

The background of this study is that there are still many students who carry out disruptive activities during the learning process. Disruptive behaviour in the classroom can adversely affect the learning process and affect the performance of students, teachers, and the class as a whole. This study is aim to analyse teacher's strategies and student preferences regarding disruptive behaviour in elementary school students. This method uses a qualitative approach with a case study design. The subjects included students and teachers of grade 4 at elementary school. The data collection techniques are using observation and interviews. The data analysis techniques include data reduction, data display, and data verification. The results of this study show that the teacher's strategy in overcoming disruptive behaviour uses three approaches, namely behavioristic, cognitive, and humanistic. Student preference in dealing with disruptive behaviour lies in the problem of learning styles that must be adapted to the way teachers teach their students. This has implications going forward so that in the learning process, teachers can use a variety of learning approaches in order to minimize disruptive behaviour by students in the classroom. If disruptive behaviour is ignored, it will be difficult to overcome it later.
Gamification Based on Android to Improve Comprehension Civics for Deaf Student
Authors: Aisyah Ayu Mustikasari  , Munawir Yusuf  , Triana Rejekiningsih
Published: April 2023

The problems that occur in the learning process for class III SLB B or deaf students originate from how the teacher conveys the material and the characteristics of the students. Teachers still teach in a simple method, so students get bored quickly. In the learning process, media is needed that prioritizes visuals to make it easier for students to capture the material presented by the teacher. This study aims to develop android-based gamification learning media on Civics theme 8 material. This research uses the Research and Development (RnD) method using the ADDIE approach. The participants in this study were 20 students of class III SLB B. The process of collecting data with interviews, questionnaires, and observation. At the same time, the instruments used are questionnaires and tests. Data analysis technique using SPSS with independent t-test. The result is that Android-based gamification media can be used in the learning process. In the experimental class, the average post-test score is 9.10, while in the control class is 8.00. Based on these values, the use of Android-based gamification learning media in the experimental class increased students' understanding of Civics compared to the control class, which did not use gamification learning media. Thus, gamification has a positive influence on increasing student understanding.
LAPS-HEURISTIC Learning Model Improves Mathematical Problem-Solving Ability
Authors: Ni Made Wiyasmei Gyanthi  , I Gusti Ayu Tri Agustiana  , Dewe Gede Firstia
Published: April 2023

Mathematics learning still needs to show more optimal results. The results of the data analysis found that around 10% of the total students were below the KKM. This research aims to analyze the application of the LAPS learning model to the problem-solving abilities of fifth-grade elementary school students. This type of research is quantitative research. The design used is a quasi-experiment. The experimental design used is the Nonequivalent Control Group Design. The population in this study is class V in elementary school, with as many as 126 students. The sampling technique uses simple random sampling. The number of samples is 28 students. The method of collecting data is a test. The data collection instrument was a test in the form of an essay. The data analysis technique used is descriptive analysis and inferential statistics. The research results are that the LAPS-Heuristic learning model significantly affects the math problem-solving abilities of fifth-grade elementary school students. It was concluded that the LAPS-Heuristic learning model could improve the math problem-solving abilities of fifth-grade elementary school students. This research implies that using the LAPS-Heuristic learning model makes students feel happy in learning mathematics, so it has an impact on students' understanding and problem-solving abilities to increase.
Faktor Penyebab dan Alternatif Solusi Rendahnya Kemampuan Reasoning Siswa Sekolah Dasar
Authors: Dharma I Made Aditya , Wahyuni Luh Tu Selpi , Suastra I Wayan , Arnyana Ida Bagus Putu
Published: April 2023

Kemampuan penalaran (reasoning skill) di sekolah dasar masih tergolong rendah Pola pikir dalam pembelajaran IPA di sekolah dasar sepatutnya dimulai dari pendidik untuk meningkatkan kemampuan reasoning siswa sekolah dasar. Tujuan penelitian ini untuk menganalisis faktor penyebab rendahnya kemampuan reasoning siswa sekolah dasar. Penelitian ini merupakan penelitian dengan menggunakan metode studi kepustakaan atau literatur review. Metode studi literatur adalah serangkaian kegiatan yang berkenaan dengan metode pengumpulan data pustaka, membaca dan mencatat, serta mengelolah bahan penulisan. Studi literatur bisa didapat dari berbagai sumber baik jurnal, buku, dokumentasi, internet dan pustaka. Penelitian ini melakukan pencarian jurnal penelitian yang dipublikasikan di internet menggunakan seach engine ProQuest, PubMed, Research Gate, SagePub dan Schoolar dengan kata kunci self-directed learning, nursing student, nursing education, competency, learning outcome. Hasil analisis dan studi kepustakaanyang dilakukan didapatkan bahwa faktor penyebab rendahnya kemampuan reasioning siswa sekolah dasar adalah motivasi siswa, sikap pendidik, lingkungan, media pembelajaran, postur sekolah dasar yang besar, dan kualitas sarana dan prasarana pendidikan. Upaya yang dilakukan oleh pemerintah sebagai solusi dalam meningkatkan hasil belajar IPA antara lain kebijakan pemerintah, kurikulum, sumber daya dan tenanga pendidik, kualitas sarana dan prasarana.
Dampak Model Project Based Learning terhadap Hasil Belajar pada Perkuliahan Bahasa Inggris Sistem Rombel
Authors: Meirawati Desak Ketut , Kresnawati Ni Luh Putu Dian
Published: April 2023

Permasalahan pembelajaran Bahasa Inggris di Perguruan Tinggi salah satunya dalah kurangnya pembelajaran yang mendorong siswa mengaplikasikan pengetahuan yang dipelajari untuk memecahkan permasalahan dunia nyata di sekitar mereka yang memberikan suatu makna bagi diri sendiri. Penelitian ini bertujuan untuk menganalisis model pembelajaran berbasis Project Base Learning terhadap hasil belajar pada perkuliahan bahasa inggris sistem rombel. Penelitian ini merupakan penelitian kuasi eksperimen (eksperimen semu) sedangkan pengumpulan data menggunakan tes/soal (pre-test dan post-test) pada kelas eksperimen dan kontrol. Teknik analisis data menggunakan analisis deskriptif. Teknik analisis data menggunakan analisis deskriptif yang meliputi uji normalitas, uji Paired Sample Test (jika data normal), uji wilcoxon jika data tidak normal, uji homogenitas, uji independent sample t test jika data normal, uji man whitney jika data tidak normal.  nilai rata-rata posttest eksperimen degan model PBL sebesar 77,90 dengan rata-rata posttest kontrol dengan model konvensional sebesar 76,78. Sehingga, model pembelajaran Project Base Learning berpengaruh terhadap hasil belajar mahasiswa pada mata pelajaran Bahasa Inggris. Serta ada perbedaan hasil belajar mahasiswa antara model Project Base Learning dengan model konvensional. Implikasi penelitian ini diharapkan dapat membantu dosen maupun mahasiswa dalam meningkatkan hasil belajar.