bluuebunny/crossref_metadata_2025 huggingface dataset:
Enfoque Contextualizado para el Desarrollo de la Investigación Artística Musical
Authors: Vásquez-Alburqueque Iris Liliana , Chunga-Amaya Wilson Hugo
Published: November 2021

En los últimos 20 años, poco se ha impulsado el crecimiento de la investigación artística musical. Para desarrollarla este tipo de investigación se necesitó que el docente adaptará la programación curricular y en la Universidad Nacional de Frontera los planes curriculares que no se han contextualizados por diversas razones académicas. El objetivo de esta investigación fue proponer un programa curricular contextualizado que desarrolle la investigación artística musical en estudiantes de administración, hotelera y de turismo. En el presente estudio surgieron 4 preguntas de investigación: ¿cómo identificar el desarrollo de investigación artística?, ¿qué fundamentos teóricos se debe considerar para caracterizar el programa?, ¿cómo validarlo? y ¿qué aspectos considerar?; que dieron origen a una propuesta metodología cuantitativa de tipo no experimental, propositiva. Se elaboraron tres cuestionarios, estos fueron aplicados a 27 estudiantes, 6 jerárquicos, 2 docentes. En esta investigación se aplicaron tres cuestionarios de 9 preguntas cada uno: a los estudiantes, jerárquicos y docentes quienes enseñaron el curso de arte en este semestre. Se concluyó que la investigación artística musical no se fomenta porque los docentes asignados a enseñar el curso de arte, sólo el 50% son de la especialidad, los programas curriculares y sílabos no están contextualizados para el desarrollo de la investigación artística musical y no se promueven proyectos formativos del área en mención.
Creación de Videojuegos como Estrategia Educativa en Algoritmia
Authors: Narváez-Díaz Lizzie Edmea , López-Martínez Rocío
Published: November 2021

La programación de computadoras y en especial los principios básicos de esta área son un aspecto importante. Por ello, la Universidad Autónoma de Yucatán (UADY) crea en la Unidad Multidisciplinaria Tizimín (UMT) la Licenciatura en Ingeniería de Software (LIS) y en ella se emprende a impartir la materia de Algoritmia en el primer semestre de la carrera. La introducción de alumnos al estudio de conceptos básicos de programación no es una tarea fácil, requiere tiempo, esfuerzo y un enfoque especial en la forma en que se aprende y se enseña. La presente investigación basada en lenguaje de programación Scratch fue incluido en la materia de Algoritmia con el objetivo de servir de apoyo en el entendimiento de las estructuras básicas que en ella se estudian y de este modo el alumno organizado en grupos de trabajo pudiera crear un videojuego para plasmar sus conocimientos. La inclusión de Scratch a Algoritmia, de la mano con la metodología del aprendizaje basada en proyectos y la teoría del construccionismo, permitió el desarrollo de habilidades en los alumnos para el desarrollo de sus videojuegos. El enfoque metodológico de la investigación fue mixto y la muestra estuvo formada por todos los alumnos inscritos a Algoritmia en tres períodos semestrales. Durante este tiempo se generaron 24 videojuegos los cuales cumplieron con los objetivos planteados y los resultados obtenidos de todo el proceso investigativo han sido satisfactorios.
Software Educativo como Método Didáctico en la Enseñanza de las Tablas de Multiplicar
Authors: Piratoba-Gil Leonardo Marcedonio
Published: November 2021

Hoy en día las matemáticas siguen siendo un gran obstáculo en la formación de los niños, ya que la observan con temor y desagrado en su proceso de aprendizaje, los profesores en la mayoría de los casos basan sus métodos de enseñanza de manera tradicional y memorística, ocasionando en los estudiantes falta de interés y motivación frente a esta área. Por tal razón, se planteó como objetivo de la presente investigación diseñar un software educativo para ayudar a fortalecer los conceptos de multiplicación en estudiantes de segundo grado de primaria. El estudio se llevó a cabo bajo la metodología investigación-acción, basado en el modelo pedagógico Escuela Nueva, se realizó el estudio a 15 estudiantes de la escuela de la vereda Santa Ana de la ciudad de Duitama. De igual forma, como instrumentos de recolección de información se aplicó una prueba diagnóstica, una de finalización y una entrevista final, resultados con los cuales se pudo establecer el impacto del software educativo en la enseñanza de las tablas de multiplicar. Los resultados obtenidos dieron muestra de la importancia de la implementación de herramientas como los softwares educativos en la enseñanza de las tablas de multiplicar, en donde se hace esencial poner a la vista de los docentes la utilidad de este material con el propósito de usarlos para mejorar los procesos de enseñanza y aprendizaje en los estudiantes. De esta manera se generó motivación el cual les permitió adquirir habilidades y competencias en matemáticas acorde a como se presenta en el mundo actual.
Habilidades Tecnológicas del Cálculo Diferencial en el Bachillerato
Authors: Herrera-López Helí , Moreno-Beltrán Reyna
Published: November 2021

El desarrollo tecnológico de la sociedad en los últimos cincuenta años ha incorporado una serie de modificaciones dentro del panorama mundial de todos los sectores productivos. Esta investigación tuvo como objetivo analizar la visión de los estudiantes más allá de un número, explorar a través de un cuestionario su perspectiva sobre el uso de elementos tecnológicos en el aula, el manejo del docente frente a la incorporación de dichos medios, así como la opinión sobre su inclusión en la asignatura de cálculo diferencial, con miras a un mejor desempeño académico y docente. Se utilizó un enfoque cuantitativo a través de un cuestionario, éste contemplaba dimensiones de valoración y perspectiva de los participantes al incluir aspectos tecnológicos en las clases de cálculo diferencial. Al analizar el impacto de la tecnología dentro del proceso formativo de los estudiantes, esta investigación aplicó un cuestionario utilizando preguntas cerradas y abiertas. Los resultados mostraron la coherencia con investigaciones previas sobre las dificultades del cálculo. Sin embargo, el presente estudio abre una visión general de elementos cualitativos de los jóvenes sobre los dispositivos digitales enfocados a la enseñanza del cálculo, los cuales permiten crear conciencia en los docentes para mostrarles una propuesta de solución ante las fuertes problemáticas existentes entornos al curso de cálculo diferencial.
Teoría del Conectivismo en el Proceso de Aprendizaje en Red de la Respiración Celular
Authors: Wilches-Vega Juan Diego
Published: November 2021

El ciclo básico de los programas de medicina se compone de asignaturas caracterizadas por ser enseñadas de manera tradicionalista, presentar contenidos complejos y en constante actualización, generando dificultades y rechazo en los aprendices. Por este motivo, el presente trabajo tuvo como objetivo analizar la incidencia del conectivismo de George Siemens en el proceso de aprendizaje en red en los cursos de Bioquímica y Biología Molecular, pues esta teoría propone herramientas para mejorar el aprendizaje de los estudiantes, a través de su inmersión, navegación y construcción de redes de aprendizaje atractivas, autogestionadas y mediadas por tecnología. Se realizó una investigación de corte cualitativo, basado en la metodología de investigación acción, el aprendizaje basado en problemas y características propias del conectivismo, con estudiantes de pregrado de primer semestre de Medicina. La población considerada en esta investigación fueron estudiantes de las carreras del área de la salud que, dentro de sus cursos formativos, debían cursar asignaturas relacionadas con bioquímica y biología molecular. Se aplicaron cuestionarios de entrada y de salida, de y se aplicaron entrevistas a los participantes, como parte del diseño de una unidad didáctica, encaminada hacia la construcción de Blogs sobre la respiración celular, estudiada desde diversos procesos fisiológicos humanos. El conectivismo facilitó y motivó a los estudiantes a explorar las herramientas que tiene a su disposición y desconoce, los invitó a construir su propia red de aprendizaje y a gestionar su proceso formativo.
Halo Mass-concentration Relation at the High-mass End
Authors: Xu Weiwei , Shan Huanyuan , Li Ran , Wang Chunxiang , Jiang Linhua , Jullo Eric , Favole Ginevra , Kneib Jean-Paul , Zhang Chaoli
Published: November 2021

The concentration–mass (c–M) relation encodes key information about the assembly history of dark matter halos. However, its behavior at the high mass end has not been measured precisely in observations yet. In this paper, we report the measurement of the halo c–M relation with the galaxy–galaxy lensing method, using the shear catalog of the Dark Energy Camera Legacy Survey (DECaLS) Data Release 8, which covers a sky area of 9500 deg2. The foreground lenses are selected from the redMaPPer, LOWZ, and CMASS catalogs, with halo masses ranging from 1013 to 1015
M
⊙ and redshifts ranging from z = 0.08 to z = 0.65. We find that the concentration decreases with the halo mass from 1013 to 1014
M
⊙, but shows a trend of upturn after the pivot point of ∼1014
M
⊙. We fit the measured c–M relation with the concentration model

c
(
M
)
=

C

0

M

10

12

M

⊙

/

h

−
γ

1
+

M

M

0

0.4

, and we get the values (C
0, γ, log10(M
0)) = (5.119−0.185
0.183,

0.205

−
0.010

0.010

,

14.083

−
0.133

0.130

) and (

4.875

−
0.208

0.209

,

0.221

−
0.010

0.010

,

13.750

−
0.141

0.142

) for halos with 0.08 ≤ z < 0.35 and 0.35 ≤ z < 0.65, respectively. We also show that the model including an upturn is favored over a simple power-law model. Our measurement provides important information for the recent argument over the massive cluster formation process.
In Search of Infall Motion in Molecular Clumps. III. HCO+ (1-0) and H13CO+ (1-0) Mapping Observations toward Confirmed Infall Sources
Authors: Yang Yang , Jiang Zhibo , Chen Zhiwei , Ao Yiping , Yu Shuling
Published: November 2021

The study of infall motion helps us to understand the initial stages of star formation. In this paper, we use the IRAM 30 m telescope to make mapping observations of 24 infall sources confirmed in previous work. The lines we use to track gas infall motions are HCO+ (1-0) and H13CO+ (1-0). All 24 sources show HCO+ emissions, while 18 sources show H13CO+ emissions. The HCO+ integrated intensity maps of 17 sources show clear clumpy structures; for the H13CO+ line, 15 sources show clumpy structures. We estimated the column density of HCO+ and H13CO+ using the RADEX radiation transfer code, and the obtained [HCO+]/[H2] and [H13CO+]/[HCO+] of these sources are about 10−11–10−7 and 10−3–1, respectively. Based on the asymmetry of the line profile of the HCO+, we distinguish these sources: 19 sources show blue asymmetric profiles, and the other sources show red profiles or symmetric peak profiles. For eight sources that have double-peaked blue line profiles and signal-to-noise ratios greater than 10, the RATRAN model is used to fit their HCO+ (1-0) lines, and to estimate their infall parameters. The mean V
in of these sources is 0.3–1.3 km s−1, and the

M

̇

in

is about 10−3–10−4
M
⊙ yr−1, which is consistent with the results of intermediate or massive star formation in previous studies. The V
in estimated from the Myers model is 0.1–1.6 km s−1, and the

M

̇

in

is within 10−3–10−5
M
⊙ yr−1. In addition, some identified infall sources show other star-forming activities, such as outflows and maser emissions. Especially for those sources with a double-peaked blue asymmetric profile, most of them have both infall and outflow evidence.
Extinction in the Large Magellanic Cloud Bar around NGC 1854, NGC 1856, and NGC 1858
Authors: De Marchi Guido , Panagia Nino , Milone Antonino P.
Published: November 2021

We report on the extinction properties in the fields around the clusters NGC 1854, NGC 1856, and NGC 1858 in the bar of the Large Magellanic Cloud. The color–magnitude diagrams of the stars in all these regions show an elongated red giant clump that reveals a variable amount of extinction across these fields, ranging from A

V
≃ 0.2 to A

V
≃ 1.9, including Galactic foreground extinction. The extinction properties nonetheless are remarkably uniform. The slope of the reddening vectors measured in the (V − I, V) and (B − I, B) color–magnitude planes is fully in line with the A

V
/E(B − V) ≃ 5.5 value found in the outskirts of 30 Dor. This indicates the presence of an additional gray extinction component in the optical requiring big grains to be about twice as abundant as in the diffuse Galactic interstellar medium (ISM). Areas of higher extinction appear to be systematically associated with regions of more intense star formation, as measured by the larger number of stars more massive than 8 M
⊙, thus making injection of big grains into the ISM by a SNII explosion the likely mechanism at the origin of the observed gray extinction component.
Reproducing the UVJ Color Distribution of Star-forming Galaxies at 0.5 < z < 2.5 with a Geometric Model of Dust Attenuation
Authors: Zuckerman Leah D. , Belli Sirio , Leja Joel , Tacchella Sandro
Published: November 2021

We analyze the distribution of rest-frame U − V and V − J colors for star-forming galaxies at 0.5 < z < 2.5. Using stellar population synthesis, stochastic star formation histories, and a simple prescription for the dust attenuation that accounts for the shape and inclination of galaxies, we construct a model for the distribution of galaxy colors. With only two free parameters, this model is able to reproduce the observed galaxy colors as a function of redshift and stellar mass remarkably well. Our analysis suggests that the wide range of dust attenuation values measured for star-forming galaxies at a given redshift and stellar mass is almost entirely due to the effect of inclination; if all galaxies at a given stellar mass were observed edge-on, they would show very similar dust attenuation. This result has important implications for the interpretation of dust attenuation measurements, the treatment of UV and IR luminosity, and the comparison between numerical simulations and observations.
High Molecular-gas to Dust Mass Ratios Predicted in Most Quiescent Galaxies
Authors: Whitaker Katherine E. , Narayanan Desika , Williams Christina C. , Li Qi , Spilker Justin S. , Davé Romeel , Akhshik Mohammad , Akins Hollis B. , Bezanson Rachel , Katz Neal , Leja Joel , Magdis Georgios E. , Mowla Lamiya , Nelson Erica J. , Pope Alexandra , Privon George C. , Toft Sune , Valentino Francesco
Published: November 2021

Observations of cold molecular gas reservoirs are critical for understanding the shutdown of star formation in massive galaxies. While dust continuum is an efficient and affordable tracer, this method relies upon the assumption of a “normal” molecular-gas to dust mass ratio, δ
GDR, typically of order 100. Recent null detections of quiescent galaxies in deep dust continuum observations support a picture where the cold gas and dust have been rapidly depleted or expelled. In this work, we present another viable explanation: a significant fraction of galaxies with low star formation per unit stellar mass are predicted to have extreme δ
GDR ratios. We show that simulated massive quiescent galaxies at 0 < z < 3 in the simba cosmological simulations have δ
GDR values that extend >4 orders of magnitude. The dust in most simulated quiescent galaxies is destroyed significantly more rapidly than the molecular gas depletes, and cannot be replenished. The transition from star-forming to quiescent halts dust formation via star formation processes, with dust subsequently destroyed by supernova shocks and thermal sputtering of dust grains embedded in hot plasma. After this point, the dust growth rate in the models is not sufficient to overcome the loss of >3 orders of magnitude in dust mass to return to normal values of δ
GDR despite having high metallicity. Our results indicate that it is not straight forward to use a single observational indicator to robustly preselect exotic versus normal ratios. These simulations make strong predictions that can be tested with millimeter facilities.
Early Activity in Comet C/2014 UN271 Bernardinelli–Bernstein as Observed by TESS
Authors: Farnham Tony L. , Kelley Michael S. P. , Bauer James M.
Published: November 2021

We used long duration observations from the Transient Exoplanet Survey Satellite (TESS) to investigate the behavior of comet C/2014 UN271 Bernardinelli–Bernstein at large heliocentric distances. By combining data from sector 03 (976 30 minute exposures from 2018), and sectors 29 and 30 (3585 and 3410 10 minute exposures, respectively, from 2020), we produced deep coadded images of the comet. A comparison of these results with similarly processed images of inactive Kuiper Belt objects and asteroids reveals that the comet was already exhibiting coma at heliocentric distances 23.8 and 21.2 au, making this one of the most distant comets for which preperihelion activity has been directly detected. A simple syndyne analysis of asymmetries in the coma suggests that activity probably started several years prior to these observations, and likely arose from emission in roughly the sunward direction. The images were used to produce photometric lightcurves, though no rotational variability was detected. We used NEOWISE observations from 2020 November 26–28 to place an upper limit of 2 × 1028 molecules s−1 (3σ) on the CO production rate.
Sunkist Peel Ethanol Extract Ameliorates Diabetic Nephropathy in Streptozotocin-Induced Diabetic Wistar Rats
Authors: Sari Maya , Ginting Chrismis Novalinda , Yulizal OK
Published: November 2021

Background: Kidney disorders in diabetic patients can gradually fall into end-stage kidney disease (ESKD) which can greatly interfere with the person's quality of life, in developed countries about 50% of patients with ESKD are caused by diabetes. On the other hand, various studies on citrus fruits have been performed to explore its pharmacological benefits.
Aim: this study was aimed to explore the benefits of Sunkist orange peel ethanol extract against diabetic nephropathy in wistar rats as animals’ trial.
Methods: This study was used 25 rats and was divided into five groups: viz. control, standard, Sunkist Peel Ethanol Extract-I, II, and III (500, 750, and 1500 mg/kg BW). After 28 days of intervention, BUN and Creatinine levels were measured in all rats. Meanwhile, data analysis used is parametric statistics in the form of One-Way ANOVA with alternative analysis in the form of the Kruskal Wallis test.
Results: This study showed that the Sunkist peels ethanol extract significantly decreased BUN (P-Value < 0.05) and creatinine (P-Value < 0.05) level. The highest dosage of extract did not show a significant difference in BUN level against standard group.
Conclusion: Overall, it can be concluded that the Sunkist peel ethanol extract has kidney protection effect against diabetic nephropathy at highest dosage (1500 mg/ kg BW).
The Effect of Gembili Starch (Dioscorea esculenta) and Eubacterium rectal Supplementation on Skeletal Muscle Peroxisome Proliferator-Activated Receptor γ Coactivator 1α (Pgc-1α) Expression in Diabetic Mice Models
Authors: Setyawati Tri , Jati Kusuma Rio , Freitag Luglio Harry , Oktiyani Neni , Sunarti Sunarti , Nur Rosmala , Hendra Syaiful
Published: November 2021

BACKGROUND: Gembili or Dioscorea esculenta is a local food that is produced by several areas in Indonesia. Few studies have reported its health benefits for diabetes mellitus but a little is understood about its mechanism of action. PGC-1α is a transcriptional coactivator for genes that involved in energy metabolism and increased expression of this gene has previously been associated with improved insulin sensitivity.

AIM: The objective of this study was to investigate the effect of Gembili starch and Gembili starch with butirogenic bacteria Eubacterium rectal on PGC-1α expression in skeletal muscle of diabetic mice.

MATERIALS AND METHODS: Three months old male diabetic Wistar mice were divided into groups based on dietary supplement: Gembili starch only; Gembili starch with E. rectal; and E. rectal only. Positive (diabetic mice) and negative (non-diabetic) control groups were used in this study. After 4 weeks of supplementation, mice were sacrificed and muscle tissue was taken from musculus vastus latissimus. Plasma blood glucose was measured before and after intervention. PGC-1α expression was measured with immunohistochemistry and quantified by dividing cells that produce PGC-1α with total cells.

RESULTS: Plasma blood glucose was reduced after invention in group that received Gembili starch only (p < 0.001); Gembili starch with E. rectal (p < 0.001); and E. rectal only (p < 0.001). The protein expression of PGC-1α in diabetic mice receiving Gembili starch only was significantly higher compared to control (p < 0.05).

CONCLUSION: This study shown that Gembili starch supplementation was able to improve glucose control in diabetic mice and this effect was obtained perhaps through PGC-1α activation. Further study is needed to investigate the effect of Gembili starch supplementation on fat metabolism.
Haploidentical Stem Cell Transplantation in Patients with Myelodysplastic Syndrome: Case Report First Experience
Authors: Pivkova-Veljanovska Aleksandra , Panovska-Stavridis Irina , Chadievski Lazar , Trajkova Sanja , Popova-Labachevska Marija , Mojsovska Tara , Stojanoska Simona , Ridova Nevenka , Krstevska-Balkanov Svetlana , Stojanoski Zlate , Spasovski Dejan , Grubovic-Rastvorceva Radica , Georgievski Borce
Published: November 2021

BACKGROUND: Allogeneic stem cell transplantation (ASCT) is a potentially curative therapeutic approach in patients with intermediate and high-risk myelodysplastic syndrome (MDS). If a family sibling or unrelated donor is not available mismatched donors are viable option for young patients with no comorbidities. The aim of this case presentation was to evaluate our first experience with haploidentical transplantation for this indication.
CASE PRESENTATION: We present a case of 50 years male patient with myelodysplastic syndrome (MDS) diagnosed at University Clinic for hematology, Skopje, North Macedonia. Patient was scored in IPSS -R as high risk patient. He was referred for HLA DNA typing of family siblings and since he didn’t have identical sibling and unrelated donor, he was referred to continue treatment with haploidentical stem cell transplantation. He received Flu Bu conditioning and PTCY, cyclosporine and MMF for GVHD prophylaxis. Peripheral blood stem cells (PBSC) from his mismatched brother were infused in the amount of CD34=5.8x106/kg. He experienced prolonged engraftment, severe infective bacterial infections and CMV reactivation with clinical manifestation of CMV colitis. He was successfully treated with antiviral drug and completely resolved. His bone marrow analysis showed complete remission and chimerism evaluation revealed high donor engraftment. Patient is now +34 months post transplant in complete remission.
CONCLUSION: The use of a mismatched donor increases the risk of NRM, but there is also evidence to suggest that an haploidentical donor is a valid choice, as general outcome appears to be at least similar to MUD.
Two new species of Diaporthe (Diaporthaceae, Diaporthales) associated with tree cankers in ﻿the Netherlands
Authors: Jiang Ning , Voglmayr Hermann , Piao Chun-Gen , Li Yong
Published: November 2021

Diaporthe (Diaporthaceae, Diaporthales) is a common fungal genus inhabiting plant tissues as endophytes, pathogens and saprobes. Some species are reported from tree branches associated with canker diseases. In the present study, Diaporthe samples were collected from Alnus glutinosa, Fraxinus excelsior and Quercus robur in Utrecht, the Netherlands. They were identified to species based on a polyphasic approach including morphology, pure culture characters, and phylogenetic analyses of a combined matrix of partial ITS, cal, his3, tef1 and tub2 gene regions. As a result, four species (viz. ﻿﻿Diaporthe pseudoalnea sp. nov. from Alnus glutinosa, Diaporthe silvicola sp. nov. from Fraxinus excelsior, D. foeniculacea and D. rudis from Quercus robur) were revealed from tree branches in the Netherlands. Diaporthe pseudoalnea differs from D. eres (syn. D. alnea) by its longer conidiophores. Diaporthe silvicola is distinguished from D. fraxinicola and D. fraxini-angustifoliae by larger alpha conidia.
Glossoloma wiehleri (Gesneriaceae), a new species from the northwestern Andes of Ecuador
Authors: Clark John L. , Tobar Francisco
Published: November 2021

A new species of Glossoloma is described from the western Andean slopes of the Pichincha Province in northern Ecuador. Glossoloma wiehleri J.L.Clark & Tobar is differentiated from all other congeners by an epiphytic habit, elongate scandent shoots that exceed four meters in length, and coriaceous leaves with a velutinous indument on the lower leaf surface. The new species is illustrated, featured with field images from recent expeditions, and assigned the category of Endangered (EN) according to IUCN Criteria.
A new Diancta species of the family Diplommatinidae (Cyclophoroidea) from Vanua Levu Island, Fiji
Authors: Bochud Estée , Haberthür David , Hlushchuk Ruslan , Neubert Eike
Published: November 2021

A new species of Diancta of the staircase snail family Diplommatinidae is described from Mt. Savusavu, Vanua Levu Island, Fiji. Due to its left coiling shell and a constriction before the last whorl, it is placed in the genus Diancta. Micro-CT imaging reveals two apertural teeth and an inner lamella that is situated at the zone of constriction. The shell abruptly changes coiling direction by 45 degrees before the last whorl. Up to now, this coiling modus had not yet been documented for any species of Diplommatinidae from the Fiji Islands.
Two new species of cricket genus Anaxiphomorpha Gorochov, 1987 (Orthoptera, Trigonidiidae, Trigonidiinae) in China
Authors: He Zhi Xin , Ma Li Bin
Published: November 2021

Two new species, Anaxiphomorpha nonggangensissp. nov. and Anaxiphomorpha manereserratussp. nov., are reported from Guangxi Province, China. Descriptions and illustrations for the new species and a key to all known species of Anaxiphomorpha are provided.
Solving reduced biquaternion matrices equation $ \sum\limits_{i = 1}^{k}A_iXB_i = C $ with special structure based on semi-tensor product of matrices
Authors: Ding Wenxv ,   College of Mathematical Sciences, Liaocheng University, Liaocheng 252000, China, Li Ying , Wei Anli , Liu Zhihong ,   Research Center of Semi-tensor Product of Matrices: Theory and Applications, Liaocheng 252000, China
Published: November 2021

In this paper, we propose a real vector representation of reduced quaternion matrix and study its properties. By using this real vector representation, Moore-Penrose inverse, and semi-tensor product of matrices, we study some kinds of solutions of reduced biquaternion matrix equation (1.1). Several numerical examples show that the proposed algorithm is feasible at last.
Hahn-Banach type theorems and the separation of convex sets for fuzzy quasi-normed spaces
Authors: Li Ruini ,   College of Mathematics Science, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, P. R. China, Wu Jianrong
Published: November 2021

In this paper, we first study continuous linear functionals on a fuzzy quasi-normed space, obtain a characterization of continuous linear functionals, and point out that the set of all continuous linear functionals forms a convex cone and can be equipped with a weak fuzzy quasi-norm. Next, we prove a theorem of Hahn-Banach type and two separation theorems for convex subsets of fuzzy quasinormed spaces.
Investigating the impact of vaccination and non-pharmaceutical measures in curbing COVID-19 spread: A South Africa perspective
Authors: Oloniiju Shina D. ,   Department of Mathematics, Rhodes University, Makhanda, PO Box 94, Grahamstown 6140, South Africa, Otegbeye Olumuyiwa , Ezugwu Absalom E. ,   School of Computer Science and Applied Mathematics, University of Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa,   School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa
Published: November 2021

The year 2020 brought about a pandemic that caught most of the world population by surprise and wreaked unimaginable havoc before any form of effective reaction could be put in place. COVID-19 is proving to be an epidemic that keeps on having an upsurge whenever it looks like it is being curbed. This pandemic has led to continuous strategizing on approaches to quelling the surge. The recent and welcome introduction of vaccines has led to renewed optimism for the population at large. The introduction of vaccines has led to the need to investigate the effect of vaccination among other control measures in the fight against COVID-19. In this study, we develop a mathematical model that captures the dynamics of the disease taking into consideration some measures that are easier to implement majorly within the African context. We consider quarantine and vaccination as control measures and investigate the efficacy of these measures in curbing the reproduction rate of the disease. We analyze the local stability of the disease-free equilibrium point. We also perform sensitivity analysis of the effective reproduction number to determine which parameters significantly lowers the effective reproduction number. The results obtained suggest that quarantine and a vaccine with at least $ 75\% $ efficacy and reducing transmission probability through sanitation and wearing of protective gears can significantly reduce the number of secondary infections.
El legado olvidado de Fernando Higueras y Antonio Miró: la Casa Rufino. Innovación constructiva y adaptación paisajística
Authors: Mayoral-Campa Esther , Navarro-de-Pablos Javier
Published: November 2021

A finales de la década de los sesenta, los arquitectos Fernando Higueras (Premio Nacional de Arquitectura 1961) y Antonio Miró elaboran cuatro proyectos en la comarca del Aljarafe sevillano. Este artículo profundiza en el menos conocido y documentado de ellos, la Casa Rufino (Palomares del Río). Para ello, se aporta un material gráfico inédito que ayuda a esclarecer cómo la obra, a pesar de su escasa difusión, asume un papel fundamental dentro de la trayectoria de sus autores. La innovación técnica que supone la utilización de las tabiquillas, el acceso a la casa desde cotas inferiores o la manipulación topográfica se convierten en recursos habituales en obras posteriores. Los hallazgos que se exponen buscan poner en valor un proyecto que, a pesar de su singularidad en el panorama de la arquitectura del siglo xx en Andalucía, muestra un alto grado de vulnerabilidad por su abandono y falta de protección patrimonial.
Correspondência espacial entre a suinocultura intensiva e a incidência de COVID-19 nos EUA, Brasil e Alemanha
Authors: Bombardi Larissa , Fiebrig Immo , Nepomuceno Pablo Luiz Maia
Published: November 2021

A imprensa internacional tem noticiado a ocorrência de surtos de contaminação por Covid-19 entre trabalhadores da produção de carnes, especialmente a de suínos, em diferentes localidades de países como os Estados Unidos, o Brasil e a Alemanha. Apesar da possibilidade de transmissão do vírus, tanto de animais para humanos, como o contrário, ainda não ter sido confirmada pelas organizações epidemiológicas de saúde e serem negadas pelas empresas e agências reguladoras, também são raras as pesquisas relacionadas a esta temática, e é praticamente inexistente a testagem em animais submetidos à criação intensiva. Por outro lado, diversos pesquisadores têm indicado que determinadas semelhanças no sistema respiratório e gastrointestinal de animais e humanos, especialmente no caso dos porcos, podem favorecer a possiblidade de transmissão interespecífica do vírus.A partir de tais questionamentos e utilizando-se técnicas da cartografia temática, essa pesquisa teve como objetivo principal identificar e analisar uma possível correspondência na distribuição espacial entre as taxas de contágio de Covid-19 e os dados de produção de suínos nestes três países. Para tanto, foram obtidos, classificados, relacionados, analisados e representados na forma de mapas temáticos, os dados de contágio de COVID-19 (até junho de 2020) e de produção de suínos nos Estados Unidos, na Alemanha e no Brasil. Países que se caracterizam por estarem entre os maiores produtores de carne suína do mundo, assim como, ao menos Estados Unidos e Brasil, estão entre os que têm apresentado as maiores taxas de contágio pelo novo coronavírus.Como resultado foi possível identificar uma evidente correspondência na distribuição espacial destes dados nos três países, indicando a necessidade urgente de maior investigação e monitoramento in loco por parte dos órgãos de vigilância sanitária e das empresas produtoras do setor.
Agricultura Urbana e a transformação da vida e da paisagem no Tatuquara, Curitiba-PR
Authors: Yonegura Valéria Borges , Silva Henrique Manoel da
Published: November 2021

A agricultura urbana (AU) caracteriza-se pela produção agrícola no perímetro urbano e periurbano, tanto para fins alimentícios de subsistência quanto para geração de renda. Dependendo do contexto do local desenvolvido, essa prática pode ocasionar melhorias na paisagem e na qualidade de vida de seus produtores, do ponto de vista nutricional e social. Este artigo tem como objetivo apresentar as transformações observadas nos anos de 2017 e 2018 no bairro Tatuquara e em alguns pontos de sua regional (Curitiba, PR) que fazem parte do entorno imediato de hortas urbanas. Observou-se que a AU foi responsável por melhorias na vida, na paisagem e na segurança da comunidade local, além do aumento do sentimento de topofilia, criação de laços afetivos com o lugar, segundo Yi-Fu Tuan. Apesar de ser usada no City marketing, a continuidade da prática está ameaçada pelo possível fim da parceria com a concessionária de energia elétrica e pela pressão do mercado imobiliário. Para este estudo, realizou-se um levantamento bibliográfico sobre o conceito de AU e um estudo histórico-geográfico do referido bairro. Foram feitas entrevistas com os horteiros do Tatuquara para avaliar seus sentimentos em relação à AU e como suas vidas foram afetadas pela sua prática.
Resilience and Sustainability Development
Authors: Wilson Lynn A.
Published: November 2021

Informed action by the leaders of the future is critical for creating resilient communities. Preparing these future leaders through formal and informal education, research, and environmental/climate change programs that interweave local knowledge with the most current global science positions them to becomes the catalysts that propel community leaders to engage a wider range of possible futures. This chapter integrates findings from a SeaTrust Institute research project with the sustainable development goals in an analysis supporting dynamic and reconfigurable combinations of agents that promote the attributes of elasticity, future orientation, and motivation to address the high stakes choices for resilience to climate and environmental/social change. Author objectives in this chapter are to illustrate the optimum roles of youth in the process and what preparations and conditions are needed to instill and support youth in their ability to flip a process at the point of catastrophe to restore equilibrium and promote resilience.
Impact of Climatic Changes on Earth's Survival
Authors: Akash  , Navneet
Published: November 2021

Every species' survival on earth is dependent on each other for their demand and dependent on the environment and various other sources. These resources include fresh food, clean drinking water, timber for construction, natural gas and coal for industries, fibers for clothing. All the human activity affects the environment severely in different ways. The biggest threats to the environment are climatic changes. Climate is an important factor that affects all survival on earth. The different pollutants, transport, dispersion, chemical transformation, as well as the deposition can be affected by meteorological variable such as humidity, wind, temperature. Climatic changes are expected to worsen the quality of air and water by changing the atmospheric processes and chemistry. Not only human beings but every aspect of the ecosystem is affected due to the changing climate. This chapter will explore the impacts of climatic changes on biodiversity by various activities of humans. Additionally, it will sketch how the impacts can be reduced by plants.
The Climate Change and Air Pollution
Authors: Maheshwari A. S.
Published: November 2021

Environmental pollution states the toxification by different forms of pollutants in the surroundings. This causes the natural system imbalance and affects the life on earth in different ways. The emissions of pollutants into air result in climate changes. The rising levels of CO2 and other air-polluting gases increase the greenhouse effect which results in temperature elevations and affects global weather patterns. Bill Gates also warned “Climate change is a terrible problem, and it absolutely needs to be solved; it deserves to be a huge priority”. Though climate change and air pollution are closely linked, these are treated as separate problems. Hence, it is aimed to understand the aspects of association between climate change and air pollution in this chapter with the objectives: (i) To know the basics of climate change and air pollution, (ii) To review the active background studies on climate change as well as on air pollution, (iii) To identify the issues, controversies, problems which include the effects of global warming and greenhouse gases followed by the types of air pollutants and its harmful effects, (iv) To find the solutions and recommendations, the discussions are made on climate laws and policies, (v) To retrieve, analyze and store the climate change related information, the description about models, tools and databases are given, (vi) To have a flawless insights on the association of climate change and air pollution, (vii) To exemplify species indicators for the assessment of the effect of air pollution on climate change are also included. As Bernie Sanders said “Climate change is a planetary crisis. We've got to act, and we have to act boldly”.
Science Communication for Climate Change Disaster Risk Management and Environmental Education in Africa
Authors: Chirisa Innocent , Matamanda Abraham Rajab
Published: November 2021

This chapter describes and explains the role of science communication to advance environmental education on climate change with a special reference on Africa being one of the regions suffering from the effects of climate-induced disasters and risks in the increased anthropogenic effects of modern development. It is argued that scientists are poor communicators on what they do, and hence, are often misunderstood by the media and society. This then calls for attention to be paid with regards to science communication, which has to be packaged in ways that make it easier for the generality of citizens to interpret and understand. Efforts in this regard are made possible through environmental education, which has proved to be useful in the discourse of disaster risk management in different parts of the world. The buttressing methodological philosophy to this chapter is applied systems approach. Critical areas of reference are health and diseases, resilient communities, coastal adaptation, and farming practices and technologies.
Investigation of the Methods of Self-Heating Climate Prevention
Authors: Strebkov Dmitry
Published: November 2021

The investigation has shown that the main cause of the global climate change is “anthropogenic thermal pollution,” which is created by the activity of mankind and creates the prerequisites for breaking the heat balance of the planet and transferring the climate into a state of self-heating. By different estimates, in 20-60 years there could be a point of no return for the warming of the climate of Earth when no material resources of mankind are able to stop the global disaster connected with thawing of glaciers, increasing level of the ocean of 80-100 m and the transition of the Earth climate to a condition incompatible with biological life. Urgent transition to fuel-free power and a change of radiation balance of Earth by increasing the albedo of the cities and deserts is necessary. Calculating the area of specular reflectors and the area of deserts necessary for their location, are necessary to prevent global warming, and showed that the required area is 0.95-1.21% of the area of the African desert.
Livestock's Near-Term Climate Impact and Mitigation Policy Implications
Authors: Wedderburn-Bisshop Gerard , Rickards Lauren
Published: November 2021

Human consumption of livestock remains a marginal issue in climate change debates, partly due to the IPCC's arbitrary adoption of 100-year global warming potential framework to compare different emissions, blinding us to the significance of shorter-term emissions, namely methane. Together with the gas it reacts to form - tropospheric ozone - methane has been responsible for 37% of global warming since 1750, yet its atmospheric life is just 10 years. Neglecting its role means overlooking powerful mitigation opportunities. The chapter discusses the role of livestock, the largest anthropogenic methane source, and the need to include reduced meat consumption in climate change responses. Looking beyond the conventional focus on the consumer, we point to some underlying challenges in addressing the meat-climate relationship, including the climate science community's reluctance to adopt a short-term focus in its climate projections. Policy options are presented.
Climate Variability and Urban Agricultural Activities in Ibadan, Nigeria
Authors: Popoola Ayobami Abayomi
Published: November 2021

Two terms that are enjoying increasing overwhelming global literature advocacy and discussion are urban farming and climate change. While there is increasing advocacy towards the relevance of urban agriculture for urban dwellers and how it translates into a mitigation strategy against climate change variability and adaptation to urban poverty, the effect of some urban farming activities and how it serves as a driver to climate change needs to be investigated. In most of the urban periphery where there is availability of a large expanse of land areas, farming activities are usually practised in form of settlement farm, livestock rearing, or plantation agriculture. The study based on quantitative and qualitative data from urban farmers in Ibadan argues that the location of urban farmlands is dependent on climatic factor such as access to land. The study identified that climate variability as reported by the urban farmers has resulted in the increased use of fertilizer for farming by urban farmers, and the main activity that is pro-climate change and variability is bush burning.
Climate Change on Fertility and Reproductive Processes of Female Livestock
Authors: Nyika Joan Mwihaki
Published: November 2021

The effects of climate change continues to be a growing modern-day challenge. Climate change-induced heat stress disrupts reproductive and fertility systems in livestock. In males, it modifies the physiology of the spermatogenic cycle resulting to poor quality semen and high prevalence of secondary sperm defects. In female livestock, heat stress decreases the production of gonadotrophins, results to hormonal imbalance, decreases the quality of oocytes, and lengthens the oestrous period leading to infertility. These effects can be reversed through genetic modifications, nutritive supplementation, physical cooling mechanisms, and hormonal therapies. The successful implementation of the ameliorative strategies is pegged on improved research and their combined administration. Ultimately, climate change mitigation and adaptation are indispensable to overcome fertility problems in livestock among other environmental effects of the climate variations.
Potential Impacts of Climate Change on Land Degradation and Desertification
Authors: Dharumarajan S.  , Veeramani S.  , Beeman Kalaiselvi , Lalitha M.  , Janani N.  , Srinivasan R.  , Hegde Rajendra
Published: November 2021

Land degradation and desertification have been graded as a major environmental and social dispute in most of the emerging countries. Changes in temperature, wind speed, and precipitation patterns will influence plant biomass production, land use, land cover, soil moisture, infiltration rate, runoff and crop management, and ultimately, land degradation. Close relations between climate change and land degradation processes have been perceived in the past decades. Climate change models and land use models should be combined with hydrologic/erosion models to accurately compute or predict climate change impacts on land degradation. This chapter introduces the advancements in modeling of impact of climate changes in land degradation and need for the critical investigation to better understand and forecast the responses of land degradation processes to a changing climate in the future.
Impact of Climate Change on Tourism
Authors: Siddiqui Samreen , Imran Muhammad
Published: November 2021

Climate change is an influencing phenomenon in present global perspective having a wide range of impacts at different levels within the society and industries. This chapter introduces the climate change basics and its major impacts on the global environment. Further, it describes the tourism industry and identifies its relationship with climate change. Scientists take different approaches to deal with climate indices and their application to identify the impact of climate change on the tourism industry. This chapter classifies the tourism industry into different industry type based on the regional characteristics links with the geographical locations. Climate effects have been discussed with different case studies and regions. Then the chapter has been concluded with the major overall impact of climate change in terms of temperature rise, sea level rise (SLR), change in precipitation and extreme events in some cases, on the tourism industry, and next steps to be taken towards sustainable tourism industry.
Climate Change and Fecal Peril
Authors: Khadra Ahmed
Published: November 2021

Fecal peril caused by intestinal parasites is commonly reported to be causing health problems in the world. Furthermore, global climate change is inevitable. The purpose of this chapter is to examine the health effects of climate change. Water shortage contribute to increase the pressure on regional water resources and force a greater number of people to use urban wastewater as an alternative for irrigation. Therefore, unsafe management and inappropriate wastewater use in urban agriculture is likely to be responsible of exacerbating the transmission of infectious diseases, including those caused by intestinal protozoa and helminths parasitic worms. It should be taken into account that waterborne diseases are influencedby climate change. The frequency and severity of intertwined extreme weather events driven by climate change are occurring worldwide and likely to cause epidemics of waterborne gastroenteritis. The association found between both rainfall, river flooding, and the majority of waterborne disease outbreaks was frequently proved to be preceded by climatic change events.