bluuebunny/crossref_metadata_2025 huggingface dataset:
Insufficient Gas Accretion Caused the Decline in Cosmic Star-formation Activity Eight Billion Years Ago
Authors: Chowdhury Aditya , Kanekar Nissim , Chengalur Jayaram N.
Published: June 2022

Measurements of the atomic hydrogen (Hi) properties of high-redshift galaxies are critical to understanding the decline in the star formation rate (SFR) density of the universe after its peak ≈8–11 Gyr ago. Here, we use ≈510 hr of observations with the upgraded Giant Metrewave Radio Telescope to measure the dependence of the average Hi mass of star-forming galaxies at z = 0.74–1.45 on their average stellar mass and redshift by stacking their Hi 21 cm emission signals. We divide our sample of 11,419 main-sequence galaxies at z = 0.74–1.45 into two stellar-mass (M
*) subsamples, with M
* > 1010
M
⊙ and M
* < 1010
M
⊙, and obtain clear detections, at >4.6σ significance, of the stacked Hi 21 cm emission in both subsamples. We find that galaxies with M
* > 1010
M
⊙, which dominate the decline in the cosmic SFR density at z ≲ 1, have Hi reservoirs that can sustain their SFRs for only a short period, 0.86 ± 0.20 Gyr, unless their Hi is replenished via accretion. We also stack the Hi 21 cm emission from galaxies in two redshift subsamples, at z = 0.74–1.25 and z = 1.25–1.45, again obtaining clear detections of the stacked Hi 21 cm emission signals, at >5.2σ significance in both subsamples. We find that the average Hi mass of galaxies with 〈M
*〉 ≈ 1010
M
⊙ declines steeply over a period of ≈1 billion years, from (33.6 ± 6.4) × 109
M
⊙ at 〈z〉 ≈ 1.3 to (10.6 ± 1.9) × 109
M
⊙ at 〈z〉 ≈ 1.0, i.e., by a factor ≳3. We thus find direct evidence that accretion of Hi onto star-forming galaxies at z ≈ 1 is insufficient to replenish their Hi reservoirs and sustain their SFRs, thus resulting in the decline in the cosmic SFR density 8 billion years ago.
A Resolved Search for AGN in the Centers of Nearby Galaxies with WISE
Authors: Li Megan G. , Sandstrom Karin M. , Leroy Adam K.
Published: June 2022

We investigate the mid-infrared detection of active galactic nucleus (AGN) in nearby galaxies and the effects of contamination by starlight and dust emission from the host galaxy. We used a sample of ∼14,000 nearby galaxies from the z = 0 Multiwavelength Galaxy Synthesis to study the effect of isolating the galaxy center on AGN detection. We identify 39 known AGN and 9 additional previously selected AGN candidates using color selection in WISE Bands 1 and 2. Most AGN identified using the smallest apertures around the nucleus are lost from the WISE color selection at larger aperture radii. This suggests that when low spatial resolution or integrated galaxy measurements are used to identify AGN in the mid-IR, lower luminosity AGN may go undetected due to contamination from the galaxy’s dust emission and starlight.
Vascular Endothelial Growth Factor, Epidermal Growth Factor, and Epithelialization Analysis on Full-Thickness Wound Applied with Topical Erythropoietin
Authors: Sari Noi Maya Anggrita , Saputro Iswinarno Doso , Hutagalung Magda Rosalina
Published: June 2022

BACKGROUND: Skin wounds are a major challenge, such as full-thickness wounds that need a long time to heal. However, the addition of erythropoietin can accelerate the wound healing process.

AIM: This study was aimed to determine the effect of topical erythropoietin administration on vascular endothelial growth factor (VEGF), epidermal growth factor (EGF), and epithelialization in the wound healing process.

METHODS: This was randomized controlled trial. Full-thickness wounds were created on the back of each white rat. No treatment was administered in the control group (n=16), and topical erythropoietin was applied in the treatment group (n=16). The rats were euthanized on day 3 and day 6 post-surgery, respectively. The expression levels of VEGF, EGF, and microscopic epithelialization rate were examined.

RESULTS: The level of EGF expression in the treatment group increased significantly on day 3 by 2.84 times compared to the control group and on day 6 increased to 4.89 times compared to the control group (p < 0.001). The level of VEGF expression in the treatment group on day 3 increased 2.18 times compared to the control group and on day 6 increased to 2.65 times compared to the control group (p < 0.001). Meanwhile, epithelialization in the treatment group on day 3 increased 1.3 times compared to the control group and on day 6 increased up to 7.62 times compared to the control group (p < 0.001).

CONLUSION: Topical administration of erythropoietin could increase the expression of VEGF, EGF, and epithelialization in both early inflammatory and proliferative phases.
Patterns and Determinants of Blood and Blood Products Transfusion in Neonate: An Experience of Single Institute
Authors: Hameed Numan Nafie , Ameen Hiba Khalil , Faraj Safa
Published: June 2022

BACKGROUND: Neonates requiring intensive care are among the most frequently transfused group of patients. Indications for blood transfusion in neonates could be physiological or pathological. However, despite frequent blood transfusions in neonates in Iraq, there is a paucity of studies on its indications and patterns among neonates in our setting.

AIM: The aim of the study is to shed light on the details of giving blood and blood products in the unit of neonate in Children Welfare Teaching hospital, Baghdad and the justifications for giving and its complication.

PATIENTS AND METHODS: A descriptive study (cross-section study) includes all neonates admitted to neonatal care unit in Children Welfare Teaching Hospital. The study includes a group of newborns who were blood transfused during their admission to hospital, over a period of 6 months from October 1, 2019 to March 30, 2020. All data were collected from each patient and recorded in predesigned forma, these data include patient’s clinical data and analyzed using descriptive statistics.

RESULTS: A total number of cases admitted over a period of 6 months were 862. One hundred and forty neonates received blood and its products transfusion, (61.4%) were male and (38.6%) were female, (62.9%) received packed red blood cells (PRBCs) followed by (18.6%) received exchange transfusion, (11.4%) received Fresh frozen plasma and (7.1%) received platelets. Most neonates received blood products transfused at (3–4) weeks. Post-natal age and were term babies (37–41) weeks. Gestational age mostly received PRBCs.

CONCLUSIONS: Most neonates with a high rate of blood and blood product transfusion were males, term, need assistant ventilation, and transfused at 3–4 weeks postnatal age.
Evaluation of Kidneys’ Functional State in Acute Lymphoblastic Leukemia Patients Following Hematopoietic Stem Cell Transplantation
Authors: Murzakhmetova Aigerim , Kemaykin Vadim , Kuttymuratov Aset , Ainabay Ayagul , Meiramova Assel , Tursynbet Yernar , Ainabekova Bayan
Published: June 2022

BACKGROUND: Hematopoietic Stem Cell Transplantation (HSCT) has recently been a widely used method of therapy in various fields of current medicine, particularly in hematology.Some patients develop renal disorders following HSCT.

AIM: This study aims to evaluate the dynamics of changes in the functional state of the kidneys in patients with ALL after HSCT.

METHODS: In the period from 2015 to 2021, for the first time in Kazakhstan, patients with acute lymphoblastic leukemia (ALL) who underwent allogeneic and haploidentical HSCT were prospectively examined.

RESULTS: We determined that the greatest decrease in glomerular filtration rate occurred in the group of patients who underwent haploidentical bone marrow transplantation. Moreover, we believe that our results are related to known contributing risk factors, such as the type of performed transplantation and the duration of taking medications for the prevention of graft versus host disease. Our results also indicate that the lethal outcome in the group with haploidentical HSCT in the studied patients with ALL was greater than in the group with allogeneic HSCT.

CONCLUSION: In conclusion, a decrease in kidney function in patients who have survived HSCT is probably a common complication; however, further prospective studies are required to confirm these results to develop additional algorithms for the treatment and prevention of renal disorders in patients with acute leukemia after HSCT.
Laboratory and Clinical Predictors for Gestational Diabetes Mellitus among Kosovo Pregnant Women
Authors: Emini-Sadiku Merita , Sadiku Izet , Lulaj Shefqet , Kocinaj Venera , Sopjani Mentor
Published: June 2022

BACKGROUND: Gestational diabetes mellitus (GDM) is a condition increasing yearly worldwide.

AIM: We investigated the prevalence and the arrangement of common risk predictors for developing GDM among Kosova pregnant women after 24 gestational weeks.

MATERIALS AND METHODS: A total of 202 hospitalized pregnant women participated in this prospective study. All participants underwent a detailed clinical examination for risk factors for GDM, followed by appropriate biochemical blood analysis and anthropometric measurements. The glucose tolerance test results were interpreted according to the criteria established by the World Health Organization (WHO) and American Diabetes Association. Participants in the first part of the study were divided into the four risk groups and in the second part GDM group (case group) or a normal glucose tolerance group (control group) to determine the risk factors for GDM and associated clinical and biochemical predictors.

RESULTS: The prevalence of gestational diabetes was 5.9%.The average age was 30.0 ± 5.5. Main characteristics of high-risk group of women for GDM were: ages above 30-year-old (p = 0.001), positive glucose intolerance (p = 0.0001), personal history for GDM (p = 0.0001), familiar history for DM (p = 0.0001), obesity (p = 0.0001), previous childbirth with weight higher than 4000 g (p = 0.0001), vulvovaginal infection (p = 0.0001), and polyhydramnios (p = 0.0001). Almost the same characteristics were found also for the GDM group: Like personal history for GDM (p = 0.0018), and family history for DM (p = 0.0018). Moreover, the group with GDM was characterized with significantly higher laboratory parameters such as fasting glycemia (p = 0.0000), triglycerides, and cholesterol concentrations (p = 0.0001). Anthropometric measurements such as weight (p = 0.002), body mass index (p = 0.0015), and systolic (p = 0.0163) and diastolic (p = 0.042) blood pressure were also significantly higher than the control group.

CONCLUSIONS: Older age, family history of diabetes and personal history for GDM, polyhydramnios, stillbirth >4000 g, were significant risk factors for GDM. Screening for risk factors can easily bring at GDM early diagnosis and prevention. Public awareness-raising on the risk factors for GDM and the need for early screening should be strongly pursued, particularly for the women at risk for GDM, especially in developing countries. At every level of health service, GDM screening to pregnant women should be incorporated as a routine antenatal visit.
Growth Velocity and Economic Aspects of Human Growth Hormone Treatment in an Egyptian Cohort with Multiple Pituitary Hormone Deficiency: A Retrospective Minireview
Authors: Attia Amany Ibrahim Mohamed Mohamed , Atef Abeer , Badawi Nora , Abdou Marise , Yassin Sahar , Helmy Eatemad , Ibrahim Hoda Atef Abdelsattar
Published: June 2022

Abstract
Background: Multiple pituitary hormone deficiency (MPHD) is a chronic lifelong disease. Human recombinant growth hormone (hGH) treatment is the optimal therapy for short stature in children with growth hormone (GH) deficiency in patients with MPHD and can effectively increase growth velocity (GV) to attain adult heights within the target range. Objective: to assess the GV during hGH treatment of children with MPHD, to analyze the characteristics of patients and to investigate the possible factors that might affect their height gain. Methods: Data from 18 (8 females) children and adolescents with MPHD with GH, thyroid stimulating hormone, gonadotropin and adrenocorticotropic hormone deficiencies were collected. Subjects were divided into groups: 12 pubescent patients and 6 pre-pubescent patients. Anthropometric measurements were reported regularly for one year. Results: age at onset of study was 13.44±4.66 years. CT and MRI findings were positive in 77.8 %. Peak GH levels after Clonidine and Insulin were 4.06±2.61 and 5.39±4.2 ng/ml respectively. GH was received in a dose of 0.95±0.5 mg/day. Height gain during the period of the study was 3.5±0.47cm /year. The predicted adult height at the first and last visits and delta predicted adult height between the first and last visits were 155.78±10.159, 156.71±7.22 and 0.93±4.64 cm respectively. The cost in dollars was identified using Markov cost-effectiveness simulation model as 98.87±52.4 dollars per one cm height gain, with a total of 346.07±183.42 US dollars/patient/year. For a hGH dose of 0.02±0.01 mg/kg/d (0.95±0.5mg/day). There was a positive correlation between height gain during the study period and both the height SDS at presentation and dose of GH mg/kg/d. Conclusion: the height gain and the cost were higher amongst females than males with MPHD. Height at presentation and hGH dose seemed to be an effective predictor for height gain in patients with MPHD.
Ecosystem condition underpins the generation of ecosystem services: an accounting perspective
Authors: La Notte Alessandra , Czúcz Bálint , Vallecillo Sara , Polce Chiara , Maes Joachim
Published: June 2022

There is a linkage between the condition of ecosystems and the services they provide. In the accounting framework set by the United Nations System of integrated Environmental Economic Accounting – Ecosystem Accounts (SEEA EA), two different sets of accounts assess and monitor ecosystem condition and ecosystem services, respectively. The former are reported as indicators in an asset account format, while the latter are reported as supply and use tables. Without a concrete linkage, the two sets of accounts run in parallel: only an ex-post correlation analysis could confirm (or not) a common path. On the other hand, a clear linkage could create a sequence that justifies and supports the statement that any change in ecosystem condition will affect services and, in turn, the benefits provided to economy and society. Concrete applications undertaken under the project “Integrated system for Natural Capital Accounts” demonstrate at which stage a direct connection can occur between ecosystem condition and ecosystem services accounting. The paper starts with a theoretical background meant to set the basic concepts underlying the transition from condition to services. Next, the accounting framework for condition accounts is briefly presented: the specific ecosystem services case studies concern flood control and crop pollination. In the discussion, a simple proposal is drafted to facilitate a possible procedure for those practitioners interested in having condition and ES accounts operationally linked.
5-year inventory management of drug products using ABC-VEN analysis in the pharmacy store of a specialized public hospital in Vietnam
Authors: Nguyen Phuc Hung , Dang Thi Van Kieu , Nguyen Phuong Thuy , Vo Thi My Huong , Nguyen Thi Tuyet Minh
Published: June 2022

In developing economies, expenses of healthcare delivery have risen disproportionally to the monetary backing supplied by the federal government. However, issues relating to inventory control alongside regulating the pharmaceutical market have been recognized. We conducted a systematic categorization based on ABC and VEN analysis for available drugs at Can Tho Dermatological Hospital (CTDH) from 2016–2020, thereby making evidence-based recommendations for public authorities to attain rationality in monitoring the stock supply network. Results revealed that ratio of Category I with the highest cost and importance to the annual revenues was barely 88%. Meanwhile, fractions of Category II and III to the overall expenses were 5–10% and below 5%, respectively. Given scarce funds, it is crucial that Essential drugs be utilized effectively. Thanks to ABC-VEN integrated matrix, we uncovered medicines for which significant savings could be achieved. This method has proven to be a powerful tool in decision-making for importation and stockholding.
Biotic Interactions as Mediators of Context-Dependent Biodiversity-Ecosystem Functioning Relationships
Authors: Eisenhauer Nico , Bonfante Paola , Buscot François , Cesarz Simone , Guerra Carlos , Heintz-Buschart Anna , Hines Jes , Patoine Guillaume , Rillig Matthias , Schmid Bernhard , Verheyen Kris , Wirth Christian , Ferlian Olga
Published: June 2022

Biodiversity drives the maintenance and stability of ecosystem functioning as well as many of nature’s benefits to people, yet people cause substantial biodiversity change. Despite broad consensus about a positive relationship between biodiversity and ecosystem functioning (BEF), the underlying mechanisms and their context-dependencies are not well understood. This proposal, submitted to the European Research Council (ERC), aims at filling this knowledge gap by providing a novel conceptual framework for integrating biotic interactions across guilds of organisms, i.e. plants and mycorrhizal fungi, to explain the ecosystem consequences of biodiversity change. The overarching hypothesis is that EF increases when more tree species associate with functionally dissimilar mycorrhizal fungi. Taking a whole-ecosystem perspective, we propose to explore the role of tree-mycorrhiza interactions in driving BEF across environmental contexts and how this relates to nutrient dynamics. Given the significant role that mycorrhizae play in soil nutrient and water uptake, BEF relationships will be investigated under normal and drought conditions. Resulting ecosystem consequences will be explored by studying main energy channels and ecosystem multifunctionality using food web energy fluxes and by assessing carbon storage. Synthesising drivers of biotic interactions will allow us to understand context-dependent BEF relationships. This interdisciplinary and integrative project spans the whole gradient from local-scale process assessments to global relationships by building on unique experimental infrastructures like the MyDiv Experiment, iDiv Ecotron and the global network TreeDivNet, to link ecological mechanisms to reforestation initiatives. This innovative combination of basic scientific research with real-world interventions links trait-based community ecology, global change research and ecosystem ecology, pioneering a new generation of BEF research and represents a significant step towards implementing BEF theory for human needs.
Réflexions sur le vivre-ensemble dans les îles du Ponant à travers le prisme de la vie associative
Authors: Bégué Audrey , Brigand Louis , Babinot Marie
Published: June 2022

Dans un contexte où les territoires sont davantage appelés à être acteurs de leur développement et relever des défis de plus en plus complexes, économiques, sociaux et environnementaux, la capacité à coopérer, en particulier celle des habitants, est considérée comme essentielle. Les espaces insulaires sont souvent perçus comme des lieux de solidarité, où le collectif jouerait a priori un rôle important. Pour autant, certains particularismes liés à l’insularité pourraient à l’inverse contribuer à des antagonismes, sur des territoires accueillant des populations d’origines diverses. Notre propos vise à questionner les spécificités du vivre-ensemble insulaire et ses modalités. La discussion est menée à partir d’une étude de cas sur les associations – outil juridique de prédilection de l’action collective – dans les îles du Ponant. Les valeurs de liberté, convivialité et solidarité se traduisent davantage par de la collaboration, notamment informelle, que par une véritable coopération territoriale. Ces dernières années émergent cependant de nouvelles dynamiques qui pourraient conduire à des évolutions en termes de gouvernance locale.
La reconstruction post-catastrophe comme opportunité ? Les enjeux d’une reconstruction durable à Saint-Martin (Antilles françaises)
Authors: Cherchelay Marie
Published: June 2022

Le 6 septembre 2017, la Collectivité d’Outre-mer française de Saint-Martin a été touchée par l’ouragan Irma. Les autorités nationales ont alors mis en place une stratégie visant à la reconstruction durable du territoire. Cet article s’intéresse aux implications de ce concept dans les processus de reconstruction post-catastrophe naturelle. Le cas de Saint-Martin, concentrant problématiques et enjeux, permet d’illustrer le fait que la notion de reconstruction durable est révélatrice des enjeux et des rapports de pouvoir qui s’exercent à plusieurs échelles dans la période post-catastrophe.
Dynamiques de transformation et discours de crise sur la scène du théâtre indépendant en Allemagne
Authors: zum Eschenhoff Silke , Haunschild Axel , Quickert Anja , Robin Guillaume
Published: June 2022

Près de 40 ans après que Bertolt Brecht a fait de l’institution théâtrale une critique globale et fondamentale, une nouvelle impulsion critique s’est développée en Allemagne dans le cadre du mouvement de 1968, dirigée contre le théâtre dans sa forme institutionnalisée prédominante. Ce mouvement a entraîné la création d’une scène théâtrale indépendante, qui s’est développée depuis lors de manière spécifique au niveau local, en fonction des critères de la politique de soutien. L’article fournit un bref aperçu de la dynamique de transformation institutionnelle en tenant compte des méthodes de travail basées sur des projets et de la politique de soutien de la scène indépendante ainsi que des discours actuels sur la crise et la légitimation.
Scènes indépendantes de la marionnette à Berlin : au cœur de changements majeurs à l’échelle de l’Allemagne ?
Authors: Chagot Mansuy Mathilde
Published: June 2022

Cet article propose un état des lieux de la scène indépendante de la marionnette contemporaine à Berlin, à un moment où les évolutions esthétiques et les incertitudes économiques qui touchent ce secteur conduisent un certain nombre de professionnel·le·s à s’interroger ensemble sur l’avenir du théâtre de marionnettes en Allemagne. Dans ce contexte, on verra à travers l’exemple de la Schaubude comment la scène berlinoise, longtemps restée à la marge d’un secteur profondément clivé, se positionne aujourd’hui de plus en plus comme un pôle de création marionnettique fédérateur et particulièrement dynamique à l’échelle nationale et internationale.
Studying forests in an open schooling project
Authors: Mulero Lorena , Cunill Jordi , Grau M. Dolors , Mancho Francesc
Published: June 2022

This study involves a European Erasmus+ project with the goal to encourage Open Science Schooling (OSS), where schools help to promote community well-being in cooperation with other stakeholders. Families, enterprises and society in general are actively involved in bringing real-life projects into the classroom. It is very important the interplay of local, regional and global contexts and dynamics in shaping education and development. This study evaluates the implementation of OSS methods in each of the schools participating using questionnaires designed specifically for this project. In one of the secondary schools students study the key role forests play in the fight against climate change, and the relationship of this natural resource with several Sustainable Development Goals (SDGs).
Students’ conceptual understanding in chemistry learning using PhET interactive simulations
Authors: Rahmawati Yuli , Zulhipri Zulhipri , Hartanto Octaviano , Falani Ilham , Iriyadi Deni
Published: June 2022

This study aims to analyse students' conceptual understanding of chemical equilibrium matter using Physics Education Technology (PhET) Interactive Simulations. Students' misconceptions can be caused by the difficulty in connecting the sub-microscopic, macroscopic, and symbolic levels of understanding in chemistry. The study was conducted at a secondary school with a total sample of 108 students using a quantitative research method. The results showed that multiple-choice questions of the two-tier Chemical Equilibrium Diagnostic Instrument (CEDI) used in this study meet with the Rasch measurement model. The students who answered correctly on content knowledge ranged from 11.1—90.7%. However, the percentage decreased to 11.1—84.3% once the content knowledge and reasons were combined. The option probability curve responses identified the students' misconceptions that were further investigated by interviews. PhET Interactive Simulations require improvements or additional features to help students better understand conceptual understanding through analogies of product and reactant molecules' movement in the equilibrium system.
The Camera-on or Camera-off, Is It a Dilemma? Sparking Engagement, Motivation, and Autonomy Through Microsoft Teams Videoconferencing
Authors: Ahmad Ridho Rojabi  , Slamet Setiawan  , Ahmad Munir  , Oikurema Purwati  , Widyastuti
Published: June 2022

A videoconferencing system to communicate synchronously is an indispensable tool for educators, teachers, students, parents, and administrators in online courses. One of the effective online learning platforms that can increase student engagement and motivation in online courses is Microsoft Teams. This research aimed to explore English as a Foreign Language (EFL) students’ views of enacting Microsoft Teams videoconferencing. This study employed a mixed-method design complemented by observation, open-ended questionnaires, as well as in-depth interviews for qualitative analysis in capturing and exploring their experience of synchronous learning using the Microsoft Teams in the post-pandemic. Furthermore, close-ended questionnaires were also distributed as quantitative data. The results revealed that Microsoft Teams helped the learners to be more involved in debates with both faculty and students as a result of their participation in discussion forums. They also gained a better comprehension and knowledge of language learning. It was clear that they were highly motivated and enjoyed the online course due to its ease of use and fun features, and they appreciated direct feedback in the synchronous online meeting. Thus, the learners with strong motivation can develop their learning autonomy. They can monitor and evaluate their self-progress in learning. Further research is highly recommended for exploiting Microsoft Teams to create innovations in a virtual classroom.
Effectiveness of Collaborative Constructivist Strategies to Minimize Gaps in Students’ Understanding of Biological Concepts
Authors: Prayitno Baskoro Adi , Sugiharto Bowo , Titikusumawati Eni
Published: June 2022

This study aimed to test how the collaborative constructivist learning strategies can reduce the gap in students’ understanding of biological concepts, compared to Novick’s constructivist strategies, and student team achievement divisions (STAD) collaborative strategies. Six classes of tenth graders consisted of 12 upper and lower academic students each were randomly placed into three learning strategy treatment groups: Collaborative constructivist, Novick’s constructivist, and STAD. Students were given essay to tests their biological concepts understanding before and after treatment. The difference in students’ understanding and the gaps in understanding between UA and LA students were analyzed. The results showed no difference in students’ understanding if treated with Novick’s and collaborative constructivist. Differences in students’ understanding were found in the treatment of STAD. Students’ understanding was higher if treated with collaborative constructivist and Novick’s constructivist than STAD. Collaborative constructivist strategies can reduce the gap in students’ understanding and optimize gain in students’ understanding to the other two strategies.
A Ubiquitous Learning Model for Education and Training Processes Supported by TV Everywhere Platforms
Authors: Moreno López Gustavo Alberto , Burgos Daniel , Jiménez Builes Jovani Alberto
Published: June 2022

Advances in technology and digital convergence, for example Netflix, enable users to view TV and video without time or place restrictions. These advances can be applied in education and training processes to enable ubiquitous learning (u-learning). However, a literature review (of the years 2002 to 2018) on u-learning models yielded scarce information about its implementation, specifically demonstrating a lack of application alternatives that could provide access to TV regardless of place and device. To contribute to this and other challenges in education, the objective of this study is to propose a reference model for u-learning implementation involving cloud-supported TV/video platforms. The model was validated in a university context by a group of experts and applied through a prototype in a real setting with students, and it showed favourable results and improvement in student performance.
The Emergence of the Emergency in Higher Education in Argentina
Authors: Lion Carina , Cukierman Uriel , Scardigli Mónica
Published: June 2022

The context of COVID-19 has deeply penetrated various aspects of university life such as academic and administrative management; teaching practices and learning have been challenged, shaken and, in some way, transformed. This arti-cle will describe an ongoing study of trends in relation to the inclusion of tech-nologies; the representations about online teaching itself, before and during the COVID-19 emergency, and also a projection into the post-COVID and the impli-cations for student’s achievements before and during the emergency. A compari-son will be made between the data obtained from these two Argentinean universi-ties and the information published by the IAU Global Survey Report [1] in order to develop a broader map about the challenges ahead for Higher Education (HE). Besides, the article will include some inquiries about whether post-pandemic ped-agogical practices will change according to teachers' own views. Based on the re-sults of the survey, we have delved into a qualitative study that focuses on chang-es in teaching and assessment practices in HE that allow us to extract from the voices of practicing professors with many years of experience, possible scenarios that account for transformations in teaching practices and ways of learning for the next few years. The empirical statistical survey carried out on more than 400 pro-fessors and the in-depth qualitative study offer results that are enlightening to re-view, in addition, management, training and relationship decisions with the stu-dent body for the coming years
Influence of Self-Regulated Strategy Development on the Performance of Virtual Reality-Based Teaching in Online Learning
Authors: Shen Huadong , Li Li
Published: June 2022

Virtual reality technology has been fully integrated into the field of education. Such technology has become the focus of online learning that uses efficient and advanced virtual reality technology to improve the efficiency of learners. Online learning also gives full play to the characteristics of free learning time, flexible location, and free learning pace. Although online learning also easily leads to low efficiency due to physical isolation, it can effectively improve the performance of virtual reality-based teaching by using the self-regulated strategy development (SRSD) model. Based on this model, an experiment was conducted on online teaching course for first-year linguistics students of a provincial graduate school in China to test the influence of the model on the performance of virtual reality-based teaching in online learning. Results show that after the SRSD model, a significant difference is observed between pretest scores and post-test scores of graduate students in the experimental group (t=−4.925, p=0.000). A significant difference is observed between pretest self-regulation and post-test self-regulation of graduate students in the experimental group (t=−7.505, p=0.000). Finally, significant differences are observed between the experimental and control groups in the improvement of post-test scores and post-test self-regulation. Conclusions are of important reference value for enriching the application of the SRSD model in virtual reality-based teaching, improving the self-regulation ability of students, and improving the performance of learners by adopting a model more suitable for the characteristics of online teaching.
Improved Multi-Channel Multi-Interface Routing Protocol for Wireless Mesh Networks
Authors: Nguyen Minh Quy , Nguyen Tien Ban , Vu Khanh Quy
Published: June 2022

In recent years, Wireless Mesh Networks (WMN) are emerging as a potential technology to enhance the ability and availability of wireless networks. WMN consists of wireless mesh routers and terminals connected by wireless multi-hop communication. Besides, in WMN, each wireless node owns many interfaces, and each interface operates on many channels. However, effectively using multiple orthogonal channels and multiple interfaces to increase the performance of WMN and decrease the radio link transmission interference is of significant challenge. In this paper, we consider routing issues in WMN. Then, we proposed an on-demand routing protocol, adaptive multi-channel multi-interface operation, improved from the AODV protocol. This protocol is capable of effectively managing communication in the WMN and limited effects of co-channel interference. The simulation results on NS2 show that our proposed protocol improves throughput, delay and packet delivery rate compared to existing traditional protocols.
ANN-based LoRaWAN Channel Propagation Model
Authors: Mohamed Hadi Habaebi  , Ahmad Shahmi Mod Rofi  , Md Rafiqul Islam  , Ahmed Basahel
Published: June 2022

LoRaWAN wireless communication channels are often impacted by noise and interference over long-range causing loss of a received signal. One of the main drawbacks of using existing propagation models is less accurate as these models in designing the communication link are tailored to simplify the estimation. In this paper, an artificial intelligent real time path loss model is proposed. It is capable of processing complex variables over a short period of time. Providing it with enough data, the model is able to learn channel behavior and predict the path loss accurately. Results of the model are benchmarked against classical statistical curve fitting models where RMSE values are also compared and indicating that the artificial intelligent model has better accurate prediction.
Design of Wearable Textile Patch Antenna Using C-Shape Etching Slot
Authors: M. M. Hasan Mahfuz  , Md Rafiqul Islam  , Mohamed Hadi Habaebi  , Jalel Chebil
Published: June 2022

With today's advanced technology microstrip patch antennas are more flexible and stronger than ever before. These antennas can work on various frequencies ranging from low to high for a huge variety of applications including medical, military and quite a few more. This paper presents the textile antennas those are designed for Wi-MAX application with the frequency range of 3.09–3.94 GHz, fifth generation (5G) lower band with the resonant frequency of 4.23–5.65 GHz and UWB 4.62–10.74 GHz applications. This work also introducing a single C-shape etching slot (CSES) in a rectangular patch antenna. The textile substrate (jeans) has been applied to reduce the surface wave losses and design a wearable textile antenna using microstrip line feed technology. Bending effect up to 750 and radiation effect on human tissue as specific absorption rate (SAR) are analyzed using Computer Simulation Technology (CST) tools. Textile antennas for multiple band applications can be created using CSES which can be attributed to cotton, denim cotton and polyester.
Promoting Students' Learning and Inclusion in Education Through Emerging Technologies of the 21st Century
Authors: Tyagi Nishi , Gupta Bhagwan Ji , Dhillion Diksha
Published: June 2022

Emerging technologies of the 21st century are able to grab the attention of learners, develop motivation, and provide opportunities for collaboration. These technologies offer the opportunity to promote students' learning by providing a safe and controlled environment through simulation that allows them to make mistakes and improve learning. These technologies have the potential to overcome the barrier of time and distance and, therefore, are able to facilitate inclusion. Disabled children can also be benefited by integrating these technologies in teaching learning process. Teachers' attitudes and institutional perspectives will play a central role in successful integration of emerging technologies in teaching learning process. Sense of fear of replacement in teachers due to use of automation in education is seen as a limitation of these technologies. Cost effectiveness is another hindrance to it. Continuous update in the field of technology in education and teachers' training are supposed to go hand in hand to successfully utilize the technology in making the teaching learning process successful.
Integration of AI in Learning
Authors: Mariappan Jasmine , Krishnan Chitra
Published: June 2022

Artificial intelligence (AI) is a cognitive mosaic science that has evolved from information derived from fields like science, mathematics, philosophy, sociology, computing, and others. As a result, any educational institution would be justified in recognizing the need of incorporating AI Readiness to maximize learning across all subjects. AI advancements can be seen everywhere, from our homes to the healthcare industry, and the education sector is no exception. But, in what ways has it progressed in the field of higher education? To ensure that students from all around the world can apply, most colleges allow digital admission applications, and paper submissions are becoming increasingly rare. However, the digital shift in admissions did not end there, as it did in all other areas. This chapter focuses on the integration of artificial intelligence in education.
COVID-19
Authors: Sumi K. V.
Published: June 2022

The SARS-CoV-19 coronavirus pandemic has had a huge economic impact around the world. As a result, the behaviour of all financial instruments, including cryptocurrencies, was significantly affected. Following the COVID-19 market crash, cryptocurrency derivative markets have seen a massive increase in popularity as speculators try to profit from the price and trading volume instability. The fluctuations in the virtual currency market during this time span seem to be a reflection of shifts in other capital and commodity markets. During this challenging era, the demand has remained relatively stable. It's yet another example of how cryptocurrencies can be viewed as a fully developed financial tool. Despite mediocre trade volume, the number of markets available increased significantly in the run-up to this case.
Coalescing Skills of Gig Players and Fervor of Entrepreneurial Leaders to Provide Resilience Strategies During Global Economic Crises
Authors: Arora Manpreet , Sharma Roshan Lal
Published: June 2022

The COVID-19 pandemic has caused diverse sorts of disruption across the globe. The pandemic has drastically impacted the economies of almost every country of the world. The international economic scenario is full of despair as the entrepreneurs and business leaders find it hard to come to terms with the extent of damage caused by the pandemic. In view of largely prevalent gloom and despair, it is imperative that certain resilience strategies are worked out so that global economic crisis can be stemmed from further escalation. The gig economy has been viewed as a powerful resilience mechanism to tide over the economic crisis caused the world over by COVID-19. Entrepreneurial leadership can also make significant difference in providing a paddle-push to the pandemic-struck world by reactivating the engines of economic growth. The nature of this chapter is qualitative, and it seeks to theoretically work out certain strategies that can help various economies of the world to stand up and be resilient in the face of complex challenges that the pandemic has thrown before us.
Interference of weeds in ruziziensis grass pastures
Authors: Pinheiro Guilherme Henrique Rodrigues , Araújo Prissila Pereira dos Santos e , Marques Ricardo Fagundes , Souza Rodrigo Marques de , Silva Ilgner Thiago Duarte , Marchi Sidnei Roberto de
Published: June 2022

The aim of this study was to assess the effect of increasing periods of coexistence of weed plants with Urochloa ruziziensis on the canopy structure and productivity of a pasture already established with this forage species. The experiment was a randomized blocks design with four replications, and treatments consisted of seven increasing periods of coexistence of forage grass with weed plants: 0 (control), 15, 30, 45, 60, 75 and 90 days after regrowth (DAR). The main morpho-structural and productive characteristics of the forage plants were determined at the end of the experimental period (90 DAR). The ratio of the first green leaf height to the tiller height increases, while the leaf to stem ratio diminishes as the period of interaction with the infesting community increases. The number of green leaves per tiller and the tiller height diminishes as the period of coexistence with weed plants increases. The presence of weed plants interferes negatively with all parameters of the grass canopy structure and productivity of a grazing land already established with Urochloa ruziziensis, suggesting that measures of control of the infesting community should be adopted up to 17 days of regrowth of the forage plant.
The genotype does not influence the establishment of elephantgrass (Pennisetum purpureum Schum.)
Authors: Ribeiro Robson Elpídio Pereira , Mello Alexandre Carneiro Leão de , Cunha Márcio Vieira da , Costa Suellen Brandão de Miranda , Coelho Janerson José , Souza Rayanne Thalita de Almeida , Santos Mércia Virginia Ferreira dos
Published: June 2022

This study investigated whether genotype influences the establishment of Pennisetum purpureum Schumach. The experimental design was a randomized complete blocks with four treatments and eight replications (n=8). The treatments were four genotypes of P. purpureum, two classified as tall sizes: P. purpureum cv. Elephant B and cv. IRI 381; and two as dwarf types: P. purpureum cv. Mott and Taiwan A-146 2.37. They were planted in a tropical wet and dry region of Brazil. Tall genotypes showed superior field sprouting rates (p < 0.05), ranging between 95-99%, while dwarfs varied between 88-90%, however, Elephant B and IRI 381 produced a much lower average number of tillers (31 and 32 linear m-1, respectively), than Taiwan A-146 2.37 and Mott (56 and 41 linear m-1, respectively) (p < 0.05). Dwarf genotypes produced lower biomass yields (p < 0.05), but this was genotype-dependent and did not impact on their establishment. The levels of non-structural carbohydrates (NSC) (>10%) in the planted stems were associated with satisfactory field sprouting of the elephantgrass genotypes. Despite some variations between the genotypes in terms of sprouting, tillering, and growth rates, the kind of genotype had no major significance on the establishment of the elephantgrass.
Concepções de letramentos subjacentes às atividades do livro didático four skills 2 produzido por professores em formação inicial
Authors: Costantin Karina dos Reis , Hartemink Patricia Streppel , Ticks Luciane Kirchhof
Published: June 2022

A formação inicial de professores deve elucidar a relação contínua entre teoria e prática, evidenciando que a produção de conhecimento científico deve ser entendida como indissociável das práticas docentes. Entretanto, relacionar aspectos teóricos e práticos configura-se como um letramento complexo para professores em formação inicial. Investigações (Motta-Roth, 2008a) revelam as dificuldades enfrentadas para a transposição de teorias da linguagem para a construção de abordagens de ensino de línguas e, estas, em materiais didáticos (Nascimento, 2017). Diante disto, o presente artigo tem como objetivo discutir os resultados obtidos na análise das concepções de letramento subjacentes às atividades de uma unidade do livro didático Four skills 2 (Schiefelbein, Duarte, & Nascimento, 2018), produzido por professores em formação inicial, em um projeto de extensão, da Universidade Federal de Santa Maria (UFSM). Como referencial teórico de análise, utilizamos as concepções de letramento discutidas por Rojo (2004), Motta-Roth (2008a) e Freire (2001), sendo elas: letramento como a) processamento de decodificação; b) processamento cognitivo; e c) processamento crítico. Os resultados indicam uma recorrência maior de atividades que exploram o letramento como processamento crítico (51,51%), focalizando questões contextuais relacionadas aos textos e seus aspectos críticos e reflexivos, seguido de atividades que exploram o processamento cognitivo (48,48%), evidenciando a localização e/ou cópia de informações.
Pesquisas em toponímia no Brasil: trabalhos produzidos na pós-graduação stricto sensu
Authors: Ananias Anna Carolina Chierotti dos Santos , Tavares Marilze
Published: June 2022

Este artigo tem como objetivo apresentar um levantamento geral das dissertações e teses produzidas no âmbito de diversos programas de pós-graduação stricto sensu de universidades brasileiras com temas voltados para a pesquisa em toponímia. O recorte temporal estabelecido para o levantamento foi o período de 1980 até janeiro de 2020 e o método utilizado para a coleta dos dados foi a Busca Simples pelo Currículo Lattes (Conselho Nacional de Desenvolvimento Científico e Tecnológico [CNPq], n.d.). A pesquisa resultou em um total de 142 trabalhos já concluídos e defendidos. Foi possível constatar, por meio da análise dos dados, que as universidades de maior destaque no que se refere à quantidade de trabalhos produzidos na área em questão são a Universidade de São Paulo (USP), a Universidade Federal de Minas Gerais (UFMS) e a Universidade Federal de Mato Grosso do Sul (UFMS). A análise dos títulos também permitiu observar que os pesquisadores têm optado por recortes diversos para as suas pesquisas, como, por exemplo, foco no tipo de motivação semântica dos designativos, nas relações entre toponímia e história, na procedência linguística dos topônimos, na confecção de atlas, glossários e dicionários de topônimos entre outros; além disso, o levantamento evidencia que a relação entre as pesquisas em toponímia e o ensino tem sido foco de interesse de alguns pesquisadores nos últimos anos.
Malationa, malation ou malatiom? A variação denominativa no processo de criação de um glossário bilíngue da área de química de pesticidas
Authors: Souza José Victor de , Pinto Paula Tavares , Lima Marcela Marques de Freitas
Published: June 2022

A presente pesquisa visa a atender às necessidades de um estudo terminológico na área de química de pesticidas, tendo em vista o fato de o Brasil ser um dos países mais produtivos em atividades agrícolas no mundo. O estudo parte do problema tradutório e terminológico da área, previamente observado por Pinto e Lima (2018) e Souza (2019), e propõe o levantamento de termos da área para a elaboração de um glossário português ⇔ inglês. A fundamentação teórica deste trabalho se baseia em estudos sobre Terminologia (Krieger & Finatto, 2004; Finatto, 2004; Bevilacqua, 2013), Química (Abakerli et al., 2003) e Linguística de Corpus (Sardinha, 2000; Tagnin, 2002). Neste artigo, explicamos o processo de criação do corpus de estudo, bem como os critérios para seleção dos candidatos a termos em inglês. A fim de ilustrar as ocorrências de variação denominativa durante a seleção dos equivalentes em português, apresentamos os passos utilizados para a seleção do termo mais adequado dentre as variantes vernaculares em português ‘malation’, ‘malationa’ e ‘malatiom’ e mostramos por que ‘malation’ é a forma escolhida, levando-se em consideração sua frequência absoluta, Average Reduced Frequency, coeficiente de variação, número de resultados em pesquisa na web, bem como critérios linguísticos, conceituais e normatizadores. Concluímos que a parceria entre ferramentas informatizadas e conhecimento especializado, tanto em linguística quanto em química, trouxe benefícios à discussão que não seriam alcançados somente por meio de cálculos computacionais.