bluuebunny/crossref_metadata_2025 huggingface dataset:
Modelling the Behaviour of Thermal Energy Harvesting Devices With Phase-change Materials
Authors: Kulish Vladimir , Hyhlík Tomáš , Sláma Pavel
Published: June 2021

The paper presents a general theoretical model of the behaviour of thermal energy harvesting devices (TEHDs), in which phase-change materials (PCMs) are used for energy storage. The main aim of the model is to establish a set of conditions, under which these devices operate in an optimal way, that is, achieve the highest thermal buffering capacity and rapidly exchange heat with the adjacent phase. An expression for the characteristic harvesting time is derived under the optimal performance assumption from the constructal theory viewpoint. A dimensionless criterion, which characterises the performance of PCMs is introduced. Further, a non-field solution of the energy equation governing the heat transfer process within TEHDs with PCMs has been obtained. An expression for the effective thermal effusivity is then derived. Finally, a concise procedure for the best choice of PCMs in TEHDs under a given set of the boundary conditions and geometrical constraints has been formulated.
Lentiviral and AAV-mediated Expression of Palivizumab Offer protection against Respiratory Syncytial Virus infection
Authors: Antepowicz Agata , Habib Omar , Kirsebom Freja , Johansson Cecilia , Gill Deborah R. , Hyde Stephen C.
Published: June 2021

Respiratory syncytial virus (RSV) infection is a common cause of hospitalisation in infants and the elderly. Palivizumab prophylaxis is the only approved treatment modality but is costly and only offered to select vulnerable populations. Here, we investigated gene delivery approaches via recombinant adeno-associated virus (rAAV2/8) and simian immunodeficiency virus (rSIV.F/HN) vectors to achieve sustained in vivo production of palivizumab in a murine model. Delivery of palivizumab-expressing vectors 28 days prior to RSV challenge resulted in complete protection from RSV-induced weight loss. This approach offers prophylaxis against RSV infection, allowing for wider use and reduction in treatment costs in vulnerable populations.
Strategies Used by Clinical Champions to De-Implement a Low-Value Care Service
Authors: Parchman Michael L , Palazzo Lorella G , Mogk Jessica M , Webbon Janna C , Demosthenes Lauren D , Vossenkemper Elizabeth , Hoke George , Moskovitz Joshua , Dunlap Leslie , Carpio Roberto Diaz del
Published: June 2021

Background: Clinical champions are front-line clinicians who advocate for and influence practice change in their local context. The strategies they use when leading efforts to de-implement the use of a low-value service have not been well described. The purpose of this study is to identify and describe important strategies used by six clinical champions who launched a de-implementation project as part of a fellowship training experience.Methods: Fellows participated in a two-round modified Delphi survey to identify the key strategies they used during their de-implementation project. In the second round the fellows were asked to identify one important strategy they would be willing to discuss in an interview. A 30-minute semi-structured interview was conducted with each fellow, transcribed and thematically analyzed.Results: The six strategies were: build a coalition, conduct a local needs assessment, develop a formal implementation blueprint, conduct educational meetings, use facilitation, and develop clinical reminders. Additional common strategies that emerged across the interviews were the use of data to engage clinicians in conversations, including the patient’s perspective in designing the interventions, and investing the time upfront to plan and launch the initiative because of the inherent challenges of relinquishing a service. Conclusions: Clinical champions identified multiple strategies as important when de-implementing a low-value service. Many were used to engage in conversations with stakeholders, including leadership, providers, and patients, to increase buy-in and support, challenge beliefs, promote behavior change, and gather insights about next steps in their effort to support de-implementing their chosen low-value service. Future work is needed to better understand how prepare clinicians for this role and to understand the mechanisms through which these strategies might be effective.
What Happens to Adipokines and Cytokine in Overweight and Obese Girls with Central Precocious Puberty When They Exercise and Stop Exercising? A randomized Controlled Trial
Authors: Shokri Elnaz , pour Ali Heidarian , Razavi Zahra
Published: June 2021

Background

we investigate the levels of adiponectin, resistin, tumor necrosis factor-alpha (TNF-α) and signs of puberty progression after 12-weeks of combined exercise and 4-weeks of detraining.
Methods

Thirty overweight and obese girls (age7-9) with precocious puberty who injected Differlin were randomly divided into two groups (exercise and control). At the beginning, blood samples were obtained from all subjects and serum levels of adiponectin, resistin and TNF-α were measured. Exercise group performed 60minutes of combined (aerobic and resistance) exercises 3 times a week for 12-weeks.Control group did not receive any exercise. 48 hours after the last training session and after four weeks of detraining, blood samples were collected in the second and third stage, respectively. Blood samples were collected from the control group in both steps. BMI, cholesterol, triglyceride, signs of puberty progression (bone age, uterine lengths, ovarian volumes), luteinising hormone (LH) and follicle-stimulating hormone (FSH) were measured on all three occasions.
Results

In the exercise group, adiponectin significantly increased and resistin significantly decreased after 12-weeks. After 4-weeks of detraining, adiponectin significantly decreased and resistin significantly increased. TNF-α levels did not change significantly during the study. There was no significant difference in all of the factors in the control group. Throughout the 16-week study period, the rate of puberty and LH significantly decreased in both exercise and control groups but FSH and LH/FSH significantly decreased in exercise group, alone.
Conclusion

Combined exercise increased adiponectin and decreased resistin and rate of puberty. After 4-weeks of detraining, these effects diminished but did not disappear.
Trial registration:

Trial registration: ISRCTN, ISRCTN39938. Registered 24 may 2021 - Retrospectively registered, https://www.isrctn.com/trialist
A Retrospective Study of Invasive Fungal Disease Treated by High Dosage Micafungin Therapy VS Standard Micafungin Therapy Among Patients with Hematologic Diseases.
Authors: Li Jia , Lv Ying , Zhang Guojun , Hu Rong , Wang Hong-Tao
Published: June 2021

Background: The standard (150mg/day) micafungin treatment regimen, is an effective and well tolerated empirical therapy for invasive fungal disease (IFD) among hematologic patients; however, experience with high dosage (200-300mg/day) micafungin treatment is limited. We retrospectively evaluated both safety and effectiveness of micafungin as an empirical antifungal therapy via standard and high dosage treatments for IFD.Methods: Patients were considered to be qualified for this analysis if they were proven, probable, or possible diagnosed as IFD. Patients without any previous exposure to an echinocandin were included; for those who changed treatment dosages and had previously received another systemic therapy except fluconazole for prevention were excluded. Safety and effectiveness were evaluated in all participated patients. IFD was diagnosed and classified according to standards defined by both European Organization for Research and Treatment of Cancer / Invasive Fungal Infections Cooperative Group, and the National Institute of Allergy and Infectious Diseases Mycoses Study Group Consensus Group.Results: Totally 72 hematologic patients participated this study. 45 patients were received a standard (150mg/day)micafungin treatment, and 27 patients were received a high dosage (200-300mg/day)micafungin treatment. Neutropenia status were similar between two groups (37.78% and 33.33%), so were other underlying risk factors. The mean duration of therapy were 15.27 days (Range: 7-47 days) in standard micafungin group, and 14.96 days (Range: 7-51 days) in high dosagemicafungin group. Drug related adverse events (AEs) occurred in 11.11% of patients received the standard regimen, and 14.81% of patients received the high dosage regimen (difference, 3.70%; 95% confidence interval [CI], -5.75% to 10.89%; statistically insignificant). The most common drug related AEs in the standard and high dosage treatment groups were liver dysfunction. Only 1 patient discontinued standard micafungin treatment, because liver function test value is 5 times greater than the upper limit of normal value. 86.67% of patients from standard treatment group, and 88.89% of patients from high dosage treatment group had favorable overall responses (difference, 2.22%; 95% CI, -4.94% to 8.64%; statistically insignificant).Conclusion: Both micafungin dosing treatments were effective, and well tolerated among hematologic patients with invasive fungal infection. Therefore, there hasn’t arisen any safety concern of high dosage(200-300mg/day) micafungin treatment.
Cinobufagin-Induced DNA Damage Response Activates G2/M Checkpoint and Apoptosis to Cause Selective Cytotoxicity in Cancer Cells
Authors: Niu Jiajing , Wang Jiamei , Zhang Qi , Zou Zhihua , Ding Yushuang
Published: June 2021

Background: Processed extracts from toad skin and parotoid gland have long been used to treat various illnesses including cancer in many Asian countries. Recent studies have uncovered a family of bufadienolides as the responsible pharmacological compounds, and the two major molecules, cinobufagin and bufalin, have been shown to possess robust antitumor activity; however, the underlying mechanisms remain poorly understood.Methods: Intracellular reactive oxygen species (ROS) were measured by DCFH-DA staining and flow cytometry, and DNA damage was analyzed by immunofluorescent staining and the alkaline comet assay. Cytotoxicity was measured by MTT as well as colony formation assays, and cell cycle and apoptosis were analyzed by flow cytometry. In addition, apoptosis was further characterized by TUNEL and mitochondrial membrane poten­tial assays. Results: Here we showed that sublethal doses of cinobufagin suppressed the viability of many cancer but not noncancerous cell lines. This tumor-selective cytotoxicity was preceded by a rapid, cancer-specific increase in cellular ROS and was significantly reduced by the ROS inhibitor N-acetyl cysteine (NAC), indicating oxidative stress as the primary source of cinobufagin-induced cancer cell toxicity. Sublethal cinobufagin-induced ROS overload resulted in oxidative DNA damage and intense replication stress in cancer cells, leading to strong DNA damage response (DDR) signaling. Subsequent phosphorylation of CDC25C and stabilization of p53 downstream of DDR resulted in activation of the G2/M checkpoint followed by induction of apoptosis. These data indicate that cinobufagin suppresses cancer cell viability via DDR-mediated G2 arrest and apoptosis.Conclusion: As elevated oxidative pressure is shared by most cancer cells that renders them sensitive to further oxidative insult, these studies suggest that nontoxic doses of cinobufagin can be used to exploit a cancer vulnerability for induction of cancer-specific cytotoxicity.
Genome-wide Association of Single Nucleotide Polymorphism Loci and Candidate Genes for Frogeye Leaf Spot (Cercospora Sojina) Resistance in Soybean
Authors: Gu Xin , Huang Shanshan , Ma Yansong , Yang Xiaohe , Yao Liangliang , Gao Xuedong , Zhang Maoming , Liu Wei , Qiu Lei , Zhao Haihong , Wang Qingsheng , Li Zengjie , Li Zhimin , Meng Qingying , Yang Shuai , Wang Chao , Hu Xiping , Ding Junjie
Published: June 2021

Background: Frogeye leaf spot (FLS) is a destructive fungal disease in soybean production. The most economical and effective strategy to control FLS is to use resistant cultivars. However, the use of a limited number of resistant loci in FLS management will be countered by the emergence of new, and more virulent, Cercospora sojina races. Thus, we identified quantitative trait loci (QTL) that control resistance to FLS and identified novel resistant genes using a genome-wide association study (GWAS) on 234 Chinese soybean cultivars.Results: A total of 30,890 single nucleotide polymorphism (SNP) markers were used to estimate linkage disequilibrium (LD) and population structure. The GWAS results identified six loci (p<0.001) distributed over chromosomes (Chr.) 2, 5, 20 comprising 69 SNPs significantly associated with FLS resistance. No previous studies have reported resistance loci in these regions. Subsequently, 55 genes in three resistance-related haplotype blocks were annotated. Glyma20g31630 encoding pyruvate dehydrogenase (PDH), Glyma05g28980 encoding mitogen-activated protein kinase 7 (MPK7), and Glyma20g31510, Glyma20g31520 encoding the calcium-dependent protein kinase 4(CDPK4) in the haplotype blocks were found to be associated with FLS resistance.Conclusions: The proteins encoded by these four genes directly, or indirectly participate in the biological pathway of salicylic acid (SA) and jasmonic acid (JA). These two plant hormones can induce the expression of disease resistance related genes and are essential for plant systemic acquired resistance (SAR). Therefore, the novel loci and candidate genes provide genomic location information for further advances in FLS resistance gene cloning and molecular breeding.
The ACE Genes in Aphelenchoides Besseyi Isolates and Their Expression Correlation to the Fenamiphos Treatment
Authors: Hsu Jung-Kai , Weng Chia-Wei , Chen Jeremy J.W. , Chen Peichen J.
Published: June 2021

Aphelenchoides besseyi could cause great yield loss on rice and many economically important crops. Acetylcholinesterase inhibitors were commonly used to mitigate plant parasitic nematodes. However, increasing nematicide-resistance has been reported due to the extensive use of these chemicals. The correlation between the AChE-inhibitor (fenamiphos) sensitivities and acetylcholinesterase (ace) genes in two isolates of A. besseyi (designated Rl and HSF) was established. The LD50 of fenamiphos to Rl and HSF were 572.2 ppm and 129.4 ppm, respectively, indicating that two nematode isolates had different sensitivities to fenamiphos. Three ace genes were cloned and sequenced in A. besseyi, and their homology was supported by phylogenic analysis with AChEs protein sequences from various vertebrate and invertebrate species. Molecular docking showed that the affinities of each AChEs to fenamiphos were higher in HSF isolate, indicating that there should be point mutations in Rl isolate AChEs. Treating the two isolates with 100 ppm fenamiphos for 12 h, three ace genes of HSF isolate were down-regulated but were up-regulated in Rl isolate. The results suggest that fenamiphos can transcriptionally modulate the expression of ace genes, as well as the variants in AChEs and increased expression of ace genes might be associated with fenamiphos-insensitivity in Rl isolate.
Determination of X-ray detection limit and application in perovskite X-ray detectors
Authors: Pan Lei , Shrestha Shreetu , Taylor Neil , Nie Wanyi , Cao Lei
Published: June 2021

X-ray detection limit and sensitivity are important figure of merits for perovskite X-ray detectors. The well-known Currie method and the followed definitions in the International Union of Pure and Applied Chemistry deal with the time-accumulated pulse counting of atomic decay for the detection limit determination of mass or concentration. Literatures lack a validated mathematic expression for determining the lowest detectable dose rate of perovskite X-ray detector working in continuous current mode. We propose new methods based on a statistical model with a mathematic expression for detection limit determination of perovskite X-ray detector, where a prior detection limit can be calculated through only dark current measurement, and a posterior check of the detectability can be performed after measurement of the signal current. With X-ray detectors fabricated of methylammonium lead triiodide (MAPbI3) single crystals from inverse temperature growth, we validated our methods with the lowest detection limit of ~ 2.4 nGyair/s achieved by disabling charge injection of a device architecture.
In.To. COVID-19 Socio-epidemiological Co-causality
Authors: Galbraith Elroy , Convertino Matteo , Li Jie , Vilas Victor Del-Rio
Published: June 2021

Social media can forecast disease dynamics, but infoveillance remains focused on infection spread, with little consideration of media content reliability and its relationship to behavior-driven epidemiological outcomes. Sentiment-encoded social media indicators have been poorly developed for expressed text to forecast healthcare pressure and infer population risk perception patterns.

Here we introduce Infodemic Tomography (InTo) as the first web-based interactive infoveillance cybertechnology that forecasts and visualizes spatio-temporal sentiments and healthcare pressure as a function of social media positivity (i.e., Twitter here), considering both epidemic information and potential misinformation. Information spread is measured on volume and retweets and the Value of Misinformation (VoMi) is introduced as the impact on forecast accuracy where misinformation has the highest dissimilarity in information dynamics. We validate InTo for COVID-19 in New Delhi and three other SE Asian cities. We forecast weekly hospitalization and cases using ARIMA models and interpolate spatial hospitalization using geostatistical kriging on inferred risk perception curves between tweet positivity and epidemiological outcomes. Geospatial tweet positivity tracks accurately ~60% of hospitalizations and forecasts hospitalization risk hotspots along risk aversion gradients. VoMi is higher for risk-prone areas and time periods, where misinformation has the highest predictability, with high incidence and positivity manifesting popularity-seeking social dynamics.

Hospitalization gradients, VoMi, effective healthcare pressure and spatial model-data gaps can be used to predict hospitalization fluxes, misinformation, capacity gaps and surveillance uncertainty. Thus, InTo is a participatory instrument to better prepare and respond to public health crises by extracting and combining salient epidemiological and social surveillance at any desired space-time scale.
Convectively-coupled High-frequency waves triggered Kerala floods in 2018 and 2019
Authors: R KIRAN S
Published: June 2021

Floods have repeatedly battered the South Indian state, Kerala, as a result of extremely anomalous rainfall during Boreal Summers, since 2018. Previous studies have seldom adopted a systematic approach to understand the phenomenon responsible for the extreme events. Hence, this study intends to identify this dynamical phenomenon based on spectral methods, and attempts to render a preliminary solution to the problem. The study exposes the presence of westward-propagating high-frequency tropical atmospheric waves of 5-8 days period, which originated from east Indian Ocean or West Pacific and headed towards the east coast of Africa. The wave troughs ensured sufficient moisture availability along its path, causing extreme precipitation over Kerala on the way.
Design and Optimization of an Electric Car Chassis and Body using Structural Analysis and CFD
Authors: Aiyan Mohammed , Sagar Sumanth , S Sanjay Raghav
Published: June 2021

The transition from traditional gasoline-powered automobiles to electric vehicles (EVs) has taken time, two major challenges of engine- powered vehicles are greenhouse gas emissions and fuel economy. Electric cars require less maintenance. A lot of money can be saved while also helping the environment. In today's world, working with lightweight materials have emerged as a key area for improvement in the automotive industry. The most efficient method for increasing power output is to reduce the weight of vehicle components. Composite materials have benefited greatly from research and development because they are stronger, more recyclable, and easier to integrate into vehicles. The primary goal of this research is to design the body and chassis frame of a two-seater electric car. A CFD analysis was performed to determine the drag coefficient of the body along with structural analysis to obtain the frontal impact and torsional rigidity of the chassis to develop an effective electric car design. The design was carried out with the help of CATIA V5 software, while the analysis was performed using ANSYS 19.2. A comparative analysis of the chassis was undertaken by incorporating three different materials namely, traditional steel i.e., Stainless Steel 304L, Aluminium Alloy 7075-T6, T300 Carbon Fibre composite. The energy efficiency of the car for the three materials are also computed.
Assessing disinformation through the dynamics of supply and demand in the news ecosystem
Authors: Gravino Pietro , Prevedello Giulio , Galletti Martina , Loreto Vittorio
Published: June 2021

Social dialogue, the foundation of our democracies, is currently threatened by disinformation and partisanship, with their disrupting role on individual and collective awareness and detrimental effects on decision-making processes. Despite a great deal of attention to the news sphere itself, little is known about the subtle interplay between the offer and the demand for information. Still, a broader perspective on the news ecosystem, including both the producers and the consumers of information, is needed to build new tools to assess the health of the infosphere. Here, we combine in the same framework news supply, as mirrored by a fairly complete Italian news database - partially annotated for fake news, and news demand, as captured through the Google Trends data for Italy. Our investigation focuses on the temporal and semantic interplay of news, fake news, and searches in several domains, including the virus SARS-CoV-2 pandemic. Two main results emerge. First, disinformation is extremely reactive to people’s interests and tends to thrive, especially when there is a mismatch between what people are interested in and what news outlets provide. Second, a suitably defined index can assess the level of disinformation only based on the available volumes of news and searches. Although our results mainly concern the Coronavirus subject, we provide hints that the same findings can have more general applications. We contend these results can be a powerful asset in informing campaigns against disinformation and providing news outlets and institutions with potentially relevant strategies.
Seroprevalence of SARS CoV-2 infection in Low and Middle-Income Countries and risk classification in the context of rolling out vaccine candidate across these countries : Protocol for a systematic review and meta-analysis
Authors: Ackah Martin , Ameyaw Louise , Akuffo Kwadwo Owusu , Yeboah Cynthia Osei , Wood Nana Esi , Compaore Rachidatou , John Denny , Eusebi Paolo , Tounaikok Narcisse , Salifu Mohammed Gazali , Danso-Appiah Anthony
Published: June 2021

Background Seroprevalence of SARS Cov-2 provides a good indication of the extent of exposure and spread in the population, as well as those likely to benefit from a vaccine candidate. To date, there is no published or ongoing systematic review on the seroprevalence of COVID-19 in Low- and Middle-Income Countries (LMICs). This systematic review and meta-analysis will estimate SARS Cov-2 seroprevalence and the risk factors for SARS Cov-2 infection in LMICs.Methods We will search PubMed, EMBASE, WHO COVID-19 Global research database, Google Scholar, the African Journals Online, LILAC, HINARI, medRxiv, bioRxiv and Cochrane Library for potentially useful studies on seroprevalence of COVID-19 in LMICs from December 2019 to December 2020 without language restriction. Two authors will independently screen all the articles, select studies based on pre-specified eligibility criteria and extract data using a pre-tested data extraction form. Any disagreements will be resolved through discussion between the authors. The pooled seroprevalence of SARS CoV-2 for people from LMICs will be calculated. Random effects model will be used in case of substantial heterogeneity in the included studies, otherwise fixed-effect model will be used. A planned subgroup, sensitivity and meta-regression analyses will be performed. For comparative studies, the analyses will be performed using Review Manager v 5.4; otherwise, STATA 16 will be used. All effect estimates will be presented with their confidence intervals.Discussion The study will explore and systematically review empirical evidence on SARS Cov-2 seroprevalence in LMICs, and to assess the risk factors for SARS Cov-2 infection in Low Middle Income Countries in the context of rolling out vaccines in these countries. Finally, explore risk classifications to help with the rolling out of vaccines in LMICs.Systematic review registration: The protocol for this review has been registered in PROSPERO (CRD422020221548).
Spatial Organization of the Micromollusc Community under Recreational Load
Authors: Yorkina Nadiia , Tarusova Natalia , Umerova Ava , Telyuk Polina , Cherniak Yevheniia
Published: June 2021

The recreational load is an important factor in transforming the living conditions of living organisms in the urban environment. This article examines the role of recreation as a driver of the changing habitat of soil micromolluscs in the park environment in an urban landscape. The hypothesis that recreational exposure changes the hierarchical organization of the spatial distribution of the micromollusc community was tested. An experimental polygon was located in Novooleksandrivskiy Park (Melitopol, Ukraine) and represented 7 transects with 18 test points in each. The set of soil properties explained 24.7% of the variation in the mollusc community. The distance from trees was able to explain 6.8% of mollusc community variation. The distance from recreational pathways was able to explain 12.2% of the variation in the mollusc community. The spatial eigenfunctions were able to explain 54.2% of mollusc community variation. The spatial patterns of variation in the structure of the assemblage of molluscs were found to be due to various causes. Thus, the broad-scale component was due to the distance from trees and the distance fro m the recreational pathways and was associated with the variability of soil penetration resistance, aggregate structure, electrical conductivity, soil moisture and density. The recreational load is the cause of this pattern formation. In turn, the medium-scale component reflected the influence of soil aggregate composition on the mollusс community and components independent of soil properties. The fine-scale component reflected the variability of the mollusc community, which was independent of soil properties.
Symplectic reduction of Yang-Mills theory with boundaries: from superselection sectors to edge modes, and back
Authors: Riello Aldo
Published: June 2021

I develop a theory of symplectic reduction that applies to bounded regions in electromagnetism and Yang--Mills theories.
In this theory gauge-covariant superselection sectors for the electric flux through the boundary of the region play a central role: within such sectors, there exists a natural, canonically defined, symplectic structure for the reduced Yang--Mills theory.
This symplectic structure does not require the inclusion of any new degrees of freedom.
In the non-Abelian case, it also supports a family of Hamiltonian vector fields, which I call ``flux rotations,'' generated by smeared, Poisson-non-commutative, electric fluxes.
Since the action of flux rotations affects the total energy of the system, I argue that flux rotations fail to be dynamical symmetries of Yang--Mills theory restricted to a region.
I also consider the possibility of defining a symplectic structure on the union of all superselection sectors. This in turn requires including additional boundary degrees of freedom aka ``edge modes.''
However, I argue that a commonly used phase space extension by edge modes is inherently ambiguous and gauge-breaking.
Propuestas didácticas mediadas por tecnologías digitales para el desarrollo de competencias de lectura y escritura académicas
Authors: Álvarez Guadalupe , Taboada María Beatriz
Published: June 2021

En el marco de una investigación que buscar caracterizar y comprender prácticas de enseñanza de la escritura con tecnologías digitales que han tenido lugar en el nivel medio y superior en Argentina, el presente artículo describe y analiza dos experiencias educativa (en Facebook y Moodle, respectivamente) que han buscado contribuir al desarrollo de competencias de lectura y escritura para el nivel superior, a partir de diferentes herramientas y dispositivos en los que se integran nuevas tecnologías. El análisis de los casos se realiza teniendo en cuenta cuatro aspectos básicos: 1) los criterios con los cuales fueron planificadas y diseñadas las experiencias; 2) las diferentes modalidades de implementación; 3) las características que adoptaron las discusiones y/o la resolución de ejercicios de reformulación en el muro y en los ejercicios de Moodle, respectivamente; 4) el punto de vista de los estudiantes sobre dichos espacios. Aun cuando las experiencias son preliminares, su análisis brinda herramientas para repensar estrategias didácticas para integrar tecnologías digitales en propuestas de enseñanza-aprendizaje que apuntan a resolver problemáticas propias de la alfabetización académica.
Voces indígenas de Tagual La Pó como referencial de una política pública de protección de territorios
Authors: Vásquez Santamaría Jorge Eduardo
Published: June 2021

El rescate de las voces indígenas en sus lenguas maternas y en sus lugares de origen, se trazó como el medio para respetar y valorar el pensamiento ancestral como principio esencial de simbolización del territorio, objeto de protección que desde las voces indígenas del resguardo Tagual La Pó, dio cuerpo al flujo decisional originario que nutre la construcción del referencial de una política pública en el Departamento de Antioquia. Las voces indígenas fueron rescatadas a partir de instrumentos de historia oral que indagaron por las representaciones e interpretaciones sobre el territorio, las relaciones que se entablan con él, y las realidades territoriales definidas como problemas públicos que en la actualidad victimizan a los integrantes del resguardo Tagual La Pó, identificando el distanciamiento con las experiencias de comunidades indígenas de las subregiones de Urabá y del Suroeste del departamento de Antioquia.
El derecho a la información como elemento integrador para la conformación de un Estado plural
Authors: Morán Ariel
Published: June 2021

La intención primordial de este trabajo es demostrar que el derecho a la información en las sociedades democráticas se convierte en el elemento que puede permitir el equilibrio entre las esferas de lo político, lo civil y de los medios, por lo que allana el terreno hacia un Estado plural, y en ello el bibliotecólogo tiene una injerencia preponderante. Además, se establece que la información, como una necesidad básica legítima, fortalece el desarrollo de una ciudadanía participativa y la toma de decisiones, lo que se traduce en un mejor ejercicio de la autodeterminación y la autonomía, lo que contribuye en autocomprensión y construcción de la identidad personal y colectiva. El artículo se basa en la teoría de justicia social de John Rawls y el pluralismo cultural de León Olivé y Luis Villoro.
Wittgenstein: de la cerrazón solipsista a la apertura comunitaria
Authors: Azar Roberto
Published: June 2021

En este trabajo me concentraré específicamente en la cuestión del solipsismo, posición filosófica a la que Wittgenstein parece haber mirado con especial simpatía en su célebre Tractatus logico-philosophicus (1921). Para demostrar, en primer lugar, que la concepción del lenguaje presentada en el Tractatus conduce inevitablemente al compromiso con una posición eminentemente solipsista y, en segundo lugar, que la ulterior concepción del significado presentada por Wittgenstein en sus Investigaciones, con la consiguiente apertura del lenguaje a su insoslayable dimensión comunitaria, trae aparejada un profundo alejamiento del tan a menudo apedreado solipsismo. Más específicamente, distinguiré dos versiones del solipsismo que, creo, es posible identificar en la concepción tractariana para, luego, considerar cómo, en las Investigaciones filosóficas, Wittgenstein encuentra dificultades esenciales en su anterior perspectiva, dificultades que lo llevan a concluir que el lenguaje no puede sino ser público y, en consecuencia, no puede sino ser un rechazo de la posición solipsista – en sus dos versiones.
La importancia del análisis crítico del discurso y la gramática visual para analizar textos
Authors: Díaz Chelech José
Published: June 2021

En estos momentos en los que parece que las ideas navegan hacia lo local y la relevancia del “yo” frente al “nosotros” es evidente, este libro apunta hacia el rumbo contrario; es decir, la solidaridad, el conocimiento del otro, la cultura global y la educación inclusiva. Hace referencia también al deterioro de la clase media en los países occidentales, que con la globalización está quedando fuera del proceso consumista, lo cual hace que se estructure una sociedad más cerrada, más local y con más muros, todo lo cual está en contra de los principios fundamentales de la educación para la ciudadanía.
La plaza de mercado como espacio de hibridación cultural, sincretismo y creolización en el continente americano
Authors: Ángel Bravo Rafael
Published: June 2021

Los procesos de globalización e industrialización en el continente americano, han llevado a la hibridación y homogeneización cultural, afectando con ello algunas expresiones tradicionales, debido a tendencias globales. Estos efectos globalizadores tienden a uniformar y amenazar el folclore y las identidades locales, al ponerlas en riesgo de desaparición. Enfrentando dichas tendencias, los mercados tradicionales se convierten en un espacio de preservación y resistencia cultural contra la modernidad y la globalización, en un esfuerzo compartido entre fabricantes, comerciantes, consumidores y visitantes, quienes luchan de manera colectiva para preservar sus expresiones culturales, incluidas la artesanía, la herencia alimentaria, las creencias religiosas y supersticiosas, la medicina y otras prácticas tradicionales. Este artículo busca reconocer la importancia y el valor de las plazas de mercado o mercados populares, como un espacio de conservación para una serie de prácticas tradicionales, costumbres y creencias, evidenciando con ello diversos fenómenos socioculturales mediante una amplia variedad de productos, artefactos y parafernalia. Con base en la experiencia directa, el registro fotográfico y distintas perspectivas teóricas, es posible desarrollar un conjunto de aproximaciones taxonómicas, frente a los productos y prácticas que se evidencian en estos lugares, facilitando así la identificación de diversos fenómenos y procesos multiculturales. Como resultado, este proyecto ha permitido identificar algunos aspectos unificadores y diferenciadores, a través de una muestra de mercados en Colombia, con exploraciones complementarias en EE. UU., Panamá y Ecuador. Finalmente, estos referentes continentales ayudan a reconocer una serie de factores geográficos, económicos y socioculturales, que se materializan a través de una amplia oferta de productos y artefactos, disponibles en estos contextos.
¿Puede prescindir Dios de la Ceroidad? Deleuze, Peirce y un experimento mental con colores
Authors: Camargo Flórez Martín Alonso
Published: June 2021

El propósito de este artículo es explorar la idea de que, aun cuando la Ceroidad fue acuñada por Deleuze y no por Peirce, no hay ningún problema en considerarla como el antecedente formal de la Primeridad. La argumentación mostrará que, sin la Ceroidad, Dios no habría podido transformar la nada en el conjunto vacío y, por tanto, no habría podido crear los elementos de la Primeridad. Esto puede ilustrarse con un experimento mental, en el que se hace evidente que, sin el conjunto vacío, no habrían surgido los continuos de la luminosidad y la coloreidad. Es decir, sin la Ceroidad del conjunto vacío, todo intento de crear los colores habría quedado absorbido en el caos de la nada.
Corporate social responsibility disclosure and profitability: Evidence from Islamic banks working in Yemen
Authors: Ahmed Mareai Senan Nabil , Abdulaziz Ali Noaman Aida , Omar Ahmad Al-dalaien Borhan , A. Al-Homaidi Eissa
Published: June 2021

This study aims to examine the influence of corporate social responsibility (CSR) disclosure determinants on profitability of Yemeni Islamic financial institutions. The empirical study was based on a balanced panel for twelve years from 2005 to 2016. Banks’ profitability is measured by four indicators such as return on assets (ROA), return on equity (ROE), profit after tax (PAT), and earnings per share (EPS), while corporate social responsibility, financial leverage, inflation rate, asset size, and age of Islamic banks are considered as independent variables. The results of this study with regard to ROA indicated that corporate social responsibility, asset size, inflation rate, and age of Islamic banks have a significant influence on profitability (ROA). With respect to ROE, the result indicated that financial leverage, asset size, and inflation rate are the most important variables affecting bank profitability (ROE). Concerning PAT, the outcome revealed that financial leverage and age of Islamic banks have a significant effect on profitability (PAT). Finally, the result with respect to EPS indicated that financial leverage, asset size, inflation rate, and age of Islamic banks have a significant impact on bank profitability (EPS). The result will be beneficial to scholars, investors, stakeholders, managers, and policymakers in the Islamic financial sector.
Influence of frugality, materialism and employee demographics on workplace deviant behaviors
Authors: Philip Adekanmbi Foluso , Ukpere Wilfred
Published: June 2021

This paper explores the impact of frugality and materialism on workplace deviant behaviors in business organizations. The investigation sample was drawn from selected business organizations (Stanbic IBTC Bank, Globacom Limited, International Alpha Limited, and Nextzon Business Services Firm) across the Ibadan and Lagos cities of Nigeria. This study espouses a quantitative research approach, and the study’s questionnaires were randomly dispersed. Out of 400 questionnaires, 323 questionnaires were useful for investigation, and the data obtained were analyzed using SPSS version 26. The research results show that the frugal are less likely to engage in workplace deviant behaviors, while materialists are more inclined to exhibit workplace deviant behaviors in business organizations. This paper further indicates that demographics (gender, marital status, and educational qualification) have a statistical effect on workplace deviant behavior. It was confirmed that frugality, materialism, and employee demographics significantly influenced workplace deviant behaviors in business organizations. Therefore, business organizations’ leadership and management should encourage frugality, thereby directly reducing employee workplace deviant behaviors. Besides, the main focus should be on reducing materialistic tendencies through periodic training and seminars on debt prevention, particularly among vulnerable employees who discourage workplace deviant behaviors. AcknowlendgmentThe authors acknowledge the Department of Industrial Psychology and People Management, College of Business and Economics, University of Johannesburg, under Professor Wilfred Ukpere, for funding this study and publishing it.
Mind Mapping: Teaching Students to Think Critically on Basic Chemical Law
Authors: Utami Aisyiyah Dinnur , Yulianto Eko , Hidayah Fitria Fatichatul
Published: June 2021

The purpose of this study was to examine the effect of the concept map learning method on students' critical thinking skills in basic chemical law material. This type of research is a quasi-experimental design with a nonequivalent control group. The research instruments used were tests and questionnaires. The variable measured was students' critical thinking. The results showed that the concept map learning method had an effect on students' critical thinking skills. This can be seen in the average value of student responses and higher learning outcomes.. In the experimental class, there was an increase in critical thinking skills from the pretest average score of 48.31 to the posttest average score of 51.40. Meanwhile, the control class experienced a decrease from the pretest average value of 47.95 to the posttest average score of 44.40. Students in the experimental class who were treated with the concept map method experienced an increase and obtained higher learning outcomes than the control class without treatment.
Chem is Fun: Animation Learning Media Based on Quantum Learning on Atomic Structure
Authors: Astuti Sri Rejeki Dwi , Sari Anggi Ristiyana Puspita , Amelia Rizki Nor
Published: June 2021

Good learning media is the media that can make it easier for students to understand a teaching material. The selection of learning media must be in accordance with these characteristics. To simplify the explanation of the atomic structure which has abstract characteristic, a learning media that can realize this material is needed. This research aims to develop interactive animation learning media Chem is Fun based on quantum learning and to determine the quality of the resulting product. The development model used is adapting the ADDIE. This research involved a media expert, a material expert, three peer reviewers and five reviewers (chemistry teacher) to assess product quality. The research instruments consist of two types of instrument, i.e. suggestion sheet and product quality questionnaire. The result show that the product of Chem is Fun has a good quality, so that it can be used as a learning media to help students' learning process on atomic structure.
Analysis of Students Understanding of Chemical Bonds Concept Using Three Tier Multiple Choice
Authors: Mellyzar Mellyzar
Published: June 2021

Diagnostic tests are needed to determine student weaknesses and can be used as a basis for follow-up with appropriate treatment. One type of diagnostic test is a three tier multiple choice. This study aims to analyze the level of students' understanding of chemical bonding material. The method used is descriptive with the research subjects of chemistry education students totaling 93 people. Data collection with 14 test questions three tier multiple choice and analysis of students' level of understanding using the technique Certainty of Responses Index (CRI). The results showed very low understanding of the chemical bond concept namely 29.50% and 62.77% misconception high category. The use of three tier multiple choice with the CRI technique is able to classify students' conceptual understanding.
Diferencias entre el SARS-CoV-2 y el coronavirus de la Bronquitis Infecciosa Aviar (IBV)
Authors: Iglesias-Osores Sebastian , Saavedra-Camacho Johnny Leandro
Published: June 2021

La enfermedad por el nuevo coronavirus 2019 (COVID-19) es causada por el virus denominado SARS-CoV-2, no obstante, en los pollos de corral los coronavirus causan Bronquitis Infecciosa Aviar. En la actualidad, se ha logrado analizar la secuencia genómica del virus SARS-CoV-2, el cual indica que éste emergió de un reservorio animal, incluso se ha considerado que un virus aislado de un murciélago, idéntico a SARS-CoV, sea el progenitor del nuevo coronavirus. En otros estudios, se ha evidenciado que la glicoproteína de la espícula viral tiene un alto grado de emparentamiento entre virus que infectan mamíferos y aves, que es la que permite el contacto con el huésped. Mientras que en el caso del IBV, al inhalarse, el virus se ligará a los receptores de glucoproteína que contienen ácido siálico en las células epiteliales ciliadas del tejido respiratorio, entonces la replicación viral dará como resultado la pérdida de la función ciliar, acopiamiento de moco, necrosis y descamación, provocando dificultad para respirar y asfixia. El IBV afecta tráquea, riñones y tracto reproductivo de muchas aves. En el caso de las gallinas, el IBV virémico causa lesiones en el magnum y en el útero. Esta revisión dilucida algunos puntos clave en las diferencias en el nuevo coronavirus y el virus de la bronquitis infecciosa. Es muy poco probable que SARS-CoV-2 infecte o cause enfermedades en las aves de corral.
Monte-Carlo for solving large linear systems of ordinary diﬀerential equations
Authors:   St. Petersburg State University, Ermakov Sergey M. , Smilovitskiy Maxim G. ,   St. Petersburg State University
Published: June 2021

Monte-Carlo approach towards solving Cauchy problem for large systems of linear differential equations is being proposed in this paper. Firstly, a quick overlook of previously obtained results from applying the approach towards Fredholm-type integral equations is being made. In the main part of the paper, a similar method is being applied towards a linear system of ODE. It is transformed into an equivalent system of Volterra-type integral equations, which relaxes certain limitations being present due to necessary conditions for convergence of majorant series. The following theorems are being stated. Theorem 1 provides necessary compliance conditions that need to be imposed upon initial and transition distributions of a required Markov chain, for which an equality between estimate’s expectation and a desirable vector product would hold. Theorem 2 formulates an equation that governs estimate’s variance, while theorem 3 states a form for Markov chain parameters that minimise the variance. Proofs are given, following the statements. A system of linear ODEs that describe a closed queue made up of ten virtual machines and seven virtual service hubs is then solved using the proposed approach. Solutions are being obtained both for a system with constant coefficients and time-variable coefficients, where breakdown intensity is dependent on t. Comparison is being made between Monte-Carlo and Rungge Kutta obtained solutions. The results can be found in corresponding tables.
Diagnostic use of Adenosine for Atrial Flutter with Regular Tachycardia
Authors: Lochan Rajeev , Arora Deepaali , Al Rahma Hussain
Published: June 2021

Background:

Supraventricular tachycardia is the commonest type of narrow complex regular tachycardia seen in an emergency room, which can easily be
diagnosed by surface ECG and acutely managed by Adenosine injection. A 59 years old male smoker was presented with palpitation with a pulse
rate of 220/min with mild hemodynamic compromise. ECG confirmed narrow complex regular tachycardia, and the initial working diagnosis was
established as Supraventricular Tachycardia (SVT) in the emergency room.

Case Presentation:

As standard practice, adenosine was given, which failed in terminating the tachycardia but by creating a transient atrioventricular block, slowed
down ventricular rate, and sawtooth-shaped P waves of atrial flutter were exposed. In contrast to the expectations, in this case of narrow complex
regular tachycardia of supraventricular origin, adenosine could not establish the sinus rhythm but confirmed the diagnosis of atrial flutter with the
regular rate with fixed A-V block.

Conclusion:

Instead of therapeutic use, adenosine has been proven to be of diagnostic value, which can be used when the diagnosis of narrow complex
tachycardia is in doubt, however with some cautions.