bluuebunny/crossref_metadata_2025 huggingface dataset:
Limits of the trivial bundle on a curve
Authors: Beauville Arnaud
Published: February 2021

We attempt to describe the rank 2 vector bundles on a curve C which are specializations of the trivial bundle. We get a complete classifications when C is Brill-Noether generic, or when it is hyperelliptic; in both cases all limit vector bundles are decomposable. We give examples of indecomposable limit bundles for some special curves.

Comment: Final version, published in Epiga
Double spinor Calabi-Yau varieties
Authors: Manivel Laurent
Published: February 2021

Consider the ten-dimensional spinor variety in the projectivization of a half-spin representation of dimension sixteen. The intersection X of two general translates of this variety is a smooth Calabi-Yau fivefold, as well as the intersection Y of their projective duals. We prove that although X and Y are not birationally equivalent, they are derived equivalent and L-equivalent in the sense of Kuznetsov and Shinder.
$\overline{M}_{1,n}$ is usually not uniruled in characteristic $p$
Authors: Sawin Will
Published: February 2021

Using etale cohomology, we define a birational invariant for varieties in characteristic $p$ that serves as an obstruction to uniruledness - a variant on an obstruction to unirationality due to Ekedahl. We apply this to $\overline{M}_{1,n}$ and show that $\overline{M}_{1,n}$ is not uniruled in characteristic $p$ as long as $n \geq p \geq 11$. To do this, we use Deligne's description of the etale cohomology of $\overline{M}_{1,n}$ and apply the theory of congruences between modular forms.

Comment: 10 pages, published version
Equivariant perverse sheaves on Coxeter arrangements and buildings
Authors: Weissman Martin H.
Published: February 2021

When $W$ is a finite Coxeter group acting by its reflection representation on $E$, we describe the category ${\mathsf{Perv}}_W(E_{\mathbb C}, {\mathcal{H}}_{\mathbb C})$ of $W$-equivariant perverse sheaves on $E_{\mathbb C}$, smooth with respect to the stratification by reflection hyperplanes. By using Kapranov and Schechtman's recent analysis of perverse sheaves on hyperplane arrangements, we find an equivalence of categories from ${\mathsf{Perv}}_W(E_{\mathbb C}, {\mathcal{H}}_{\mathbb C})$ to a category of finite-dimensional modules over an algebra given by explicit generators and relations. We also define categories of equivariant perverse sheaves on affine buildings, e.g., $G$-equivariant perverse sheaves on the Bruhat--Tits building of a $p$-adic group $G$. In this setting, we find that a construction of Schneider and Stuhler gives equivariant perverse sheaves associated to depth zero representations.

Comment: 28 pages, 6 figures. v5 processed for publication in Epiga
CARTAN GEOMETRIES ON COMPLEX MANIFOLDS OF ALGEBRAIC DIMENSION ZERO
Authors: Biswas Indranil , Dumitrescu Sorin , Mckay Benjamin
Published: February 2021

We show that compact complex manifolds of algebraic dimension zero bearing a holomorphic Cartan geometry of algebraic type have infinite fundamental group. This generalizes the main Theorem in [DM] where the same result was proved for the special cases of holomorphic affine connections and holomorphic conformal structures.

Nous montrons que toute variété complexe compacte de dimension algébrique nulle possédant une géométrie de Cartan holomorphe de type algébrique doit avoir un groupe fondamental infini. Il s’agit d’une généralisation du théorème principal de [DM] où le même résultat était montré dans le cas particulier des connexions affines holomorphes et des structures conformes holomorphes.
Coincidence of two Swan conductors of abelian characters
Authors: Kato Kazuya , Saito Takeshi
Published: February 2021

There are two ways to define the Swan conductor of an abelian character of the absolute Galois group of a complete discrete valuation field. We prove that these two Swan conductors coincide.

Comment: 16 pages. Formatted using epigamath.sty
Isomorphisms between complements of projective plane curves
Authors: Hemmig Mattias
Published: February 2021

In this article, we study isomorphisms between complements of irreducible curves in the projective plane $\mathbb{P}^2$, over an arbitrary algebraically closed field. Of particular interest are rational unicuspidal curves. We prove that if there exists a line that intersects a unicuspidal curve $C \subset \mathbb{P}^2$ only in its singular point, then any other curve whose complement is isomorphic to $\mathbb{P}^2 \setminus C$ must be projectively equivalent to $C$. This generalizes a result of H. Yoshihara who proved this result over the complex numbers. Moreover, we study properties of multiplicity sequences of irreducible curves that imply that any isomorphism between the complements of these curves extends to an automorphism of $\mathbb{P}^2$. Using these results, we show that two irreducible curves of degree $\leq 7$ have isomorphic complements if and only if they are projectively equivalent. Finally, we describe new examples of irreducible projectively non-equivalent curves of degree $8$ that have isomorphic complements.
Variation of stable birational types in positive characteristic
Authors: Schreieder Stefan
Published: February 2021

Let k be an uncountable algebraically closed field and let Y be a smooth projective k-variety which does not admit a decomposition of the diagonal. We prove that Y is not stably birational to a very general hypersurface of any given degree and dimension. We use this to study the variation of the stable birational types of Fano hypersurfaces over fields of arbitrary characteristic. This had been initiated by Shinder, whose method works in characteristic zero.

Comment: 14 pages; final version, published in EPIGA
Fujiki relations and fibrations of irreducible symplectic varieties
Authors: Schwald Martin
Published: February 2021

This paper concerns different types of singular complex projective varieties generalizing irreducible symplectic manifolds. We deduce from known results that the generalized Beauville-Bogomolov form satisfies the Fujiki relations and has the same rank as in the smooth case. This enables us to study fibrations of these varieties; imposing the newer definition from [GKP16, Definition 8.16.2] we show that they behave much like irreducible symplectic manifolds.

Comment: Published version
Opers of higher types, Quot-schemes and Frobenius instability loci
Authors: Joshi Kirti , Pauly Christian
Published: February 2021

In this paper we continue our study of the Frobenius instability locus in the coarse moduli space of semi-stable vector bundles of rank $r$ and degree $0$ over a smooth projective curve defined over an algebraically closed field of characteristic $p>0$. In a previous paper we identified the "maximal" Frobenius instability strata with opers (more precisely as opers of type $1$ in the terminology of the present paper) and related them to certain Quot-schemes of Frobenius direct images of line bundles. The main aim of this paper is to describe for any integer $q \geq 1$ a conjectural generalization of this correspondence between opers of type $q$ (which we introduce here) and Quot-schemes of Frobenius direct images of vector bundles of rank $q$. We also give a conjectural formula for the dimension of the Frobenius instability locus.

Comment: 17 pages; Final version Epijournal de G'eom'etrie Alg'ebrique, Volume 4 (2020), Article Nr. 17
Rationally connected rational double covers of primitive Fano varieties
Authors: Pukhlikov Aleksandr V.
Published: February 2021

We show that for a Zariski general hypersurface $V$ of degree $M+1$ in ${\mathbb P}^{M+1}$ for $M\geqslant 5$ there are no Galois rational covers $X\dashrightarrow V$ of degree $d\geqslant 2$ with an abelian Galois group, where $X$ is a rationally connected variety. In particular, there are no rational maps $X\dashrightarrow V$ of degree 2 with $X$ rationally connected. This fact is true for many other families of primitive Fano varieties as well and motivates a conjecture on absolute rigidity of primitive Fano varieties.

Comment: the final journal version
Exceptional collections on certain Hassett spaces
Authors: Castravet Ana-Maria , Tevelev Jenia
Published: February 2021

We construct an $S_2\times S_n$ invariant full exceptional collection on Hassett spaces of weighted stable rational curves with $n+2$ markings and weights $(\frac{1}{2}+\eta, \frac{1}{2}+\eta,\epsilon,\ldots,\epsilon)$, for $0<\epsilon, \eta\ll1$ and can be identified with symmetric GIT quotients of $(\mathbb{P}^1)^n$ by the diagonal action of $\mathbb{G}_m$ when $n$ is odd, and their Kirwan desingularization when $n$ is even. The existence of such an exceptional collection is one of the needed ingredients in order to prove the existence of a full $S_n$-invariant exceptional collection on $\overline{\mathcal{M}}_{0,n}$. To prove exceptionality we use the method of windows in derived categories. To prove fullness we use previous work on the existence of invariant full exceptional collections on Losev-Manin spaces.

Comment: At the request of the referee, the paper arXiv:1708.06340 has been split into two parts. This is the second of those papers (submitted). 36 pages
Motives with modulus, I: Modulus sheaves with transfers for non-proper modulus pairs
Authors: Kahn Bruno , Miyazaki Hiroyasu , Saito Shuji , Yamazaki Takao
Published: February 2021

We develop a theory of modulus sheaves with transfers, which generalizes Voevodsky's theory of sheaves with transfers. This paper and its sequel are foundational for the theory of motives with modulus, which is developed in [KMSY20].

Comment: 64 pages
Prime Fuzzy Bi-Ideals in Near-Subtraction Semigroups
Authors: Mumtha K. , Mahalakshmi V. , Devi S. Usha
Published: February 2021

A study on fuzzy prime ideals in near-subtraction semigroups is already known. We have to expand the concept of prime fuzzy bi-ideals in near-subtraction semigroups and analyse some of its properties to characterize it. This will lead to learn a new type of fuzzy ideal and to develope the researcher to made their research.
Preliminary Comments on Language Arts Textbooks In Use In The Primary Schools of Trinidad And Tobago
Authors: Knight H. E. , Carrington Lawrence D. , Borely C.
Published: February 2021

One would expect that the linguistic struc­tures presented in the Language Arts text­books used in schools would be appro­priately graded and selected for the particular group of children and would be unquestion­able in their acceptability. For a variety of reasons this is not the case. Thus, in our study, while some attention is paid to features which are un­desirable from any standpoint, our main con­cern is with the suitability of these textbooks for our special needs.
Data Information System Strategies in Business Intelligence
Authors: K Karthikeyan
Published: February 2021

The application of Information Systems (IS) in business necessitates critical comprehension of the business, management activities and the initiatives that structure various business systems. Various IS can be presented as management and business remedies to issues affecting the enterprise and influenced by the ecosystem. The initiatives in IS have significantly influenced how business is run in the modern competitive age. The advent and development of technology have allowed opportunities to be availed to people to prepare the business for challenges in this competitive environment. To effectively manage IS-centred frameworks, it is fundamental to implement effective approaches, which define framework, including the ways of managing them. Strategic data system alignment provides a fundamental approach to maintain and develop IS frameworks, which support operations in business. IS alignment plans and organizational plans are fundamental for enhanced Business Performance (BP). This research paper reviews the critical elements of strategic data system alignment in the transforming organizational conditions in developed countries.
Pengaruh Penempatan Kerja dan Rotasi Kerja terhadap Labour Turn Over pada PT. Beton Prima Indonesia
Authors: Purnama Reka Ardian
Published: February 2021

The turnover rate is a pretty good criterion to measure the stability that occurs in the organization, and it can also reflect the performance of the organization. The aspect of placing employees in filling existing positions in the company is the main thing and affects employee turnover. This study aims to analyze the effect of job placement and job rotation on labor turnover at PT Beton Prima Indonesia. The research method used in this research is regression research. The type of data used in this research is quantitative and the data sources used include primary and secondary data. This study uses a questionnaire instrument. The variables that are the object of this research are job placement (X1), work rotation (X2), and turnover (Y). The analysis technique used is using multiple linear regression analysis. The results of multiple linear regression analysis show that the variables of job placement and job rotation have a simultaneous effect on turnover. The overall contribution of the variables in giving effect to turnover is 93.6% while the remaining 6.4% is influenced by other variables not examined. Partially the job placement variable has no effect on turnover. Partially work rotation variable affects turnover. Work rotation variable is the independent variable which dominantly affects the dependent variable, namely turnover at PT Beton Prima Indonesia.
An Ornamentalist View of Metaphor in Arabic Literary Theory
Authors: Shuqair Khaled M.
Published: February 2021

The aim of the present paper is to examine the kind of thinking and the chain of assumptions that lie behind the reduction of metaphor to a mere ornament in Arabic literary theory.   For this purpose, Arabic ornamentalist thinking is traced from the third century A.H. (the ninth century A.D.) to the seventh century A.H. (the thirteenth century A.D.).  This is not to say, however, that the seventh century marks the end of such thinking in Arabic literary theory, but that at that time the Arabic literary theory, and the theory of metaphor, was developed into fixtures with an increasing emphasis given to form over content and the art of verbal expression in general.  Inordinate attention was given to ornate style, and rhetoric became an arena for displaying verbal acrobatics.  The axioms, "closeness of resemblance" and "congruity of metaphorical elements," represent metaphor's highest degree of formalization and stereotyping.  That is why some of the images in classical theory are mainly based on complete parallelism between the objects compared, particularly with regard to form, size and color.  From that time onwards, the fixtures of the classical theory have been kept intact.   Metaphor, and rhetoric in general, is nowadays reduced to textbooks to be studied in abstract and rigid terms developed by the classical theory.  Arabic rhetoric is a dead discipline: it is merely an ornamental repertoire of figures that could only be used as a sweet adorner for the language.
Entendimentos de professores que ensinam matemática sobre a relação entre jogo e raciocínio lógico
Authors: Souza Renaura Matos de , Souza Ilvanete dos Santos de , Lima Reinaldo Feio
Published: February 2021

Este estudo buscou respostas ao seguinte questionamento: como professores que ensinam matemática, nos Anos Finais do Ensino Fundamental, na rede municipal de Barreiras-BA, entendem os jogos matemáticos como instrumento de desenvolvimento do raciocínio lógico? Trata-se de uma pesquisa de abordagem qualitativa do tipo exploratória, que objetivou identificar e compreender o entendimento dos professores que ensinam matemática, nos Anos Finais do Ensino Fundamental, na rede municipal de Barreiras-BA, sobre os jogos matemáticos como instrumento de desenvolvimento do raciocínio lógico. Os dados foram produzidos por meio de um questionário exploratório, com questões abertas e fechadas e analisados à luz da Análise de Conteúdo de Bardin. A pesquisa evidenciou o reconhecimento pelos professores do uso do jogo enquanto recurso que auxilia o desenvolvimento do raciocínio lógico, mas alguns fatores influenciam o (não) uso do jogo enquanto recurso capaz de estimular o raciocínio lógico, destacando, ainda, as dificuldades conceituais como um “empecilho” para o avanço do raciocínio lógico. No entanto, esses profissionais sinalizam que fazem uso do jogo no contexto no qual atuam.
Rotação de galáxias e matéria escura
Authors: Hernández-Arboleda Alejandro , Rodrigues Davi Cabral
Published: February 2021

Galáxias desempenharam e seguem desempenhando um relevante papel na determinação da matéria escura e suas propriedades. Apresentamos uma introdução sobre a dinâmica interna de galáxias, em particular sobre a rotação de galáxias de disco, e sobre como seus dados indicam a presença de matéria escura. Este texto é destinado a qualquer leitor interessado no assunto, ainda que sem experiência prévia em astrofísica.
The Impact of Covid-19 on Hotel Industry In Asian Countries
Authors: Agustina Indriyani Tri , Yosintha Rolisda
Published: February 2021

The spread of Covid-19 has led to a global problem in all aspects of life, including in the tourism sector that directly affects the hotel industry. Asia as a continent with many countries that rely most of their revenue on tourism suffers a severe blow. The purpose of this study was to investigate the impacts of the novel Covid-19 on the hotel industry in Asian countries. Through a descriptive qualitative method, the researchers collected data from journals, research reports, books, government documents, articles, and websites. In analyzing the data, the researchers make a comparison between the Asian continent and other continents such as Europe, America, Africa, and Australia by focusing on the hotel occupancy in those continents. The result shows that the rate of hotel occupancy in Asia dropped by 57% and 63,4 million employees lose their jobs. This condition is mainly caused by the travel ban regulation that is followed by the temporary closure of tourist destinations. The hotel industry in Asia has lost up to US$ 1.041 million due to massive booking cancellations, and employees in this industry are even more severely affected as they have no income to support their life.
THE INFLUENCE OF PARENTAL DEMANDINGNESS ON MALE ADOLESCENT REBELLIOUS BEHAVIOUR IN PUBLIC SECONDARY SCHOOLS
Authors: Macharia Jane , Shikuku Dr. Mulambula M
Published: February 2021

Purpose: The purpose of this study was to determine the influence of parental demandingness on male adolescent rebellious behaviour in public secondary schools in Kiambu district. Methodology: The study used ex-post facto research design. Stratified sampling was used to select the participants in the study. Schools were stratified into single sex and co-education schools.  Systematic sampling using the class lists was used to identify the students who constituted the sample. The research instruments were the students’ questionnaire, the deputy principal’s and the teacher counsellor’s interview guide. The sample constituted 240 male students, six deputy principles and six teacher counselors. A pilot study was done to pre-test the research instruments so as to estimate their reliability and validity. Data collected was analyzed using Statistical Package for Social Sciences (SPSS). The findings were presented using descriptive and inferential statistics. Descriptive statistics included, frequency distribution, means, bar graphs, and tabulated according to the research objectives. Inferential statistics used included Chi Square and pearson correlation to test the hypotheses at 90% and 95% level of confidence; correlation coefficient was used to measure the strength of linear relationship between the variables of the study.Results: The results indicated that rebellious behaviour was positively and significantly correlated to parental demandingness.Unique contribution to theory, practice and policy: The study came up with a model that is recommended to schools for adoption by guidance and counselling teachers to help create awareness and understanding to both the students and parents with the aim of improving or bettering their relationship, academic performance and prevent rebellion in public secondary schools.
DETERMINANTS OF CAREER CHANGE AMONG TEACHERS IN RURAL KENYA: THE CASE OF TANA RIVER COUNTY
Authors: Kiongo Patrick
Published: February 2021

Purpose: The purpose of this study was to investigate the determinants of career change in rural schools. The study was based on the theory of occupational choice and career typology theory. From the context of the theories, the underlying determinants under investigation were categorized into environmental, organizational and individual factors.Methodology:  The study applied both inferential and descriptive survey research.  Stratified and simple random sampling techniques were used to identify one hundred forty-seven (147) respondents from a study population of 1,555 teachers distributed in one hundred eighty-two public schools.  The study used questionnaire as key instrument to acquire primary data while desk review of reports and publications was applied for secondary data.Findings: The study revealed that 55% of the respondents harbored plans to switch to other career later in life with individuality factors being the most significant compared to environmental and organizational factors which ranked second and third respectively.Unique Contribution to Practice and Policy: Educational institutions should therefore strive to achieve a sustainable balance between the teacher intrinsic and extrinsic influences in management of teacher career change. The findings of this study will illuminate policy assumptions behind different strategies used in efforts to alleviate problems associated with teacher’s career change in rural areas. In addition, the affected teachers will have a common understanding of challenges affecting them and have a common voice in articulating their issues for policy consideration.
IMPACT OF COOPERATIVE MASTERY LEARNING APPROACH ON STUDENTS’ ACADEMIC ACHIEVEMENT IN CHEMISTRY BY GENDER IN BOMET COUNTY, KENYA
Authors: Keter John K , K Ronoh P
Published: February 2021

Purpose: The study investigated the Impact of Cooperative Mastery Learning Approach (CMLA) on Students’ Achievement in Chemistry by Gender in Bomet County, Kenya.Methodology: Non-equivalent control group design under quasi-experimental research was used in which samples of four co-educational sub-county secondary schools were drawn from the schools in the County. Each school provided one Form Two class for the study. This translated to a total of 205 subjects. Students in all the four groups were taught the same chemistry content of the topic, Effect of Electric Current on Substances for a period of five weeks. In the experimental groups, CMLA teaching strategy was used while Conventional Teaching Methods were used in the control groups. Data was collected using a Chemistry Achievement Test (CAT) whose reliability coefficient was found to be 0.78, hence suitable for data collection since the value was greater than the threshold of 0.70.One null hypothesis was stated. The data collected were subjected to statistical analysis at 0.05 α-level of significance using Statistical Package for Social Sciences (SPSS) computer package. t-test statistics was used.Results: The findings from the study indicate that the achievement level was high for students taught using CMLA compared to those taught using Conventional Teaching Methods (CTM). The results also indicate that there was no gender difference in achievement when boys and girls were taught through CMLA implying that the teaching approach is suitable for teaching both male and female students. This in turn will help in bridging the persistent gender gap in chemistry achievement among secondary school students.Unique contribution to theory, practice and policy: Since CMLA enhances students’ achievement in chemistry, educators and teachers should be encouraged to use it in an attempt to improve performance in chemistry. In addition, teacher education institutions should make it part of their teacher training curriculum content.
THE ACTIVITY OF CHINESE MUSLIMS IN THE SOCIAL, ECONOMIC AND CULTURAL LIFE OF THE COUNTRY IN THE IX-XVI CENTURIES
Authors: Ernazaro Odiljon
Published: February 2021

The article presents information about the
socio-political, economic, and cultural conditions in China
in the 9th-16th centuries, the spread of Islam in China and its
adaptation to the local culture, the participation of Muslim
peoples in the social, economic, cultural life and educational
process of the country. Also, it analyzes the formation of
Muslim communities among the majority of followers of
Buddhism, Confucianism, and Taoism by adapting to their
religious beliefs, close to the content of Islam, and the
emergence of 10 separate legal systems, such as “Zu Tang”
(“Foreigner living in China” ), “Fang Ke” (“Descendants
of local Muslims”), “Fang Hue” (“Schools for foreigners”),
“Qadi Department” (for the resolution of Muslim religious
affairs), “Triple Administration” (consisting of an imam,
a khatib and a muezzin dealing with the daily affairs of
Muslims), which regulated the social and religious life of
Muslims in China. It was found that during the Tang, Song,
Yuan, and Ming dynasties, fundamental changes occurred
that contributed to the spread and development of Islam
throughout China. Thanks to an active policy of national
assimilation, the political status of Muslims changed,
and they became the indigenous citizens of China. It was
concluded that the participation of Muslims in the policy of
national assimilation became the basis for the formation of
new national communities based on common values, ethics,
and rituals, as well as for the wider dissemination of Islamic
teachings and philosophy in other parts of China.
STUDY OF AMIR KHUSROW DEHLAVIY’S RUBA’IS
Authors: Nizamova Feruza
Published: February 2021

The article provides data on the manuscripts and studies of the legacy of Amir Khusrow Dehlavi, stored in the Institute of Oriental Studies named after Abu Rayhan Biruni of the Academy of Sciences of the Republic of Uzbekistan. In the manuscripts we examined, there is information about the origin of ghazals, but there is no mention of the origin of the ruba’is. In many manuscripts, the order of fling the ruba’is is not based on any principle. Only a few of them are arranged alphabetically, either by the frst letter of the verse or by the last letter of the rhyme. It should be noted that the mixed order of transmission of the ruba’is in fve divans in the manuscripts involved in the study can be explained by the long-standing tendency of the poet’s attempts to include them in the framework of one collection. As the main sources of research under the heading of Amir Khusrow Dehlavi can be used the manuscripts of the poet’s works stored at the Abu Rayhan Biruni Institute of Oriental Studies of the Academy of Sciences of the Republic of Uzbekistan. The study of these sources will help to address the gaps in the available publications and to bring the ruba’is to a fuller scale. The materials concerning the rubaiyat of Amir Khusrow Dehlavi, published in Kanpur, Tehran, Dushanbe, do not fully cover the works of the poet of this genre. Therefore, they can only be used as auxiliary resources for research. Our research on the ruba’is of Dehlavi shows that the manuscripts of the Abu Reikhan Biruni Institute of Oriental Studies are reliable and important sources for compiling a complete collection of poetry in this genre. The opinions of previous and current researchers of works about the impossibility of compiling a complete collection of the poetic heritage of Amir Khusrow Dehlavi also apply to his ruba’is. But our research shows that it is possible to create the largest collection of Amir Khusrov Dehlavi’s ruba’is based on the poet’s manuscripts from the funds of Uzbekistan. The large number of handwritten copies of the works of Amir Khusrow Dehlavi allows us to determine when and how many works of this genre were copied, which makes it possible to carry out further research in this area.
ACTIVITIES OF CENTRAL ASIAN RESEARCH CENTRES IN THE ARAB STATES
Authors: Ikromov Shavkat
Published: February 2021

This article is devoted to the activities of centers for the scientific study of Central Asia in the Arab states. In the article, based on Arabic-language sources, a comparative and content analysis of research and work carried out in scientific centers of Saudi Arabia, Egypt, Iraq, and Algeria are carried out. As well as scientific research at the universities of Baghdad, Mosul, Mustansiri and Kufa in Iraq, several higher educational institutions and research centers such as Al-Azhar in Cairo on the history and politics of Central Asia. The purpose of this article is to study the coverage of the modern history of Uzbekistan in scientific centers of Arab countries and a comparative analysis of new interpretations of the latest issues of our history. For this purpose, a review of the literature on this topic is presented, the significance and description of research
centers are noted, the features of materials on the modern history of Uzbekistan in scientific centers, and directions of the topics studied are studied. Methodologically, the materials of research centers in Arab countries were studied in the context of historiography, the method of content analysis was used as the main method, as well as systematic and comparative analyzes, chronological-problem methods. The novelty of the research - the article presents an analysis of new interpretations of the modern history of Uzbekistan and classifies the research of scientific centers as an object.
The study revealed the limited knowledge about Uzbekistan in Arab countries, the stability of existing trends and stereotypes in them, the narrowness and one-sidedness
of the current discussions. The conclusion emphasizes the need for deeper,
continuous, and systematic analytical approaches in the study of Uzbekistan by Arab research centers, as well as the need for their constant monitoring.
Mahmudhoja Behbudiy leader of the Jadid reforms
Authors: Xujaev Muminjon
Published: February 2021

We are witnessing that the ideas of our Jadids,
who tried to raise Turkestan through enlightenment to the
level of world civilization at the beginning of the 20th
century, and who showed modern education as a solution to
the problems of that period, have not lost their significance
today. In this sense, the study of the works of the famous
orientalist Mahmudkhodja Behbudi based on new scientific
criteria plays an important role in the study of issues of
interethnic communication, peaceful coexistence, education,
culture, and religious tolerance.
M. Behbudi in the late 19th and early 20th centuries
began a systematic struggle against fanaticism, nationalism,
voluntarism (rejecting the laws of nature and society and
taking into account only desires), which negatively affects
the development of Turkestan. To this end, he visited Saudi
Arabia in 1899-1900 (according to some sources in 1902),
Moscow and St. Petersburg in 1903-1904, to Kazan, Ufa,
Nizhny Novgorod in 1906. As a result of these trips, after his
return, he introduced various new scientific, secular sciences
to his school, began to develop science in Turkestan using
the scientific knowledge of that time.
The fundamental scientific ideas of M. Behbudi on
the issues of ensuring the prosperity and sustainable
development of Turkestan through the reform of the
education system as a solution to the problems remaining
in the field of science, the development of not only religious
but also secular sciences, as well as national tolerance in
the public consciousness, contribute to the development
of advanced sciences. Mahmudkhodja Behbudi reflects on
the importance of the reform of secular sciences - public
education, the need to establish a dialogue with culture,
educational literature and textbooks of the Turkic peoples,
in particular, he published such textbooks as "The Book of
Literacy" (1904), "Introduction to the Geography", (1905),
“Brief General Geography” (1906), “Children's Letter”
(1905), “The Practice of Islam” (1908), “The History of
Islam” (1909). He writes the dramas "Patricide" (1911),
"Khatun with a white fan" (story), "The Grief of a child"
(story), "Kitobat Al-atfol" (in the Old Uzbek language) and
works related to education and training, as well as publishes
his works in the printing house of the publishing house
“Behbudiya”.
Today, the significance of the ideas of the unity of the
scientific heritage of Mahmudkhodja Behbudi is being
studied as a valuable resource in the development of modern
education in Turkestan in the late 19th and early 20th
centuries.
Observations by a statistical watchdog
Authors: Taube Adam
Published: February 2021

During more than five decades, the author has kept a critical eye on how statistical methods are (mis-)used in medical research. Some areas are presented where serious statistical mistakes are prevalent. Two investigations with erroneous conclusions are described in detail. Situations where outside authorities have tried to mute medical researchers are also commented upon. The authors own efforts to improve the use of statistical methods and the current situation with easily accessible statistical program packages are described. Finally, the importance of continued ‘statistical cleansing’ is stressed.
El aprendizaje de los objetivos de desarrollo sostenible en las asignaturas de microeconomía y macroeconomía
Authors: Martí Selva Maria Luisa , Puertas Rosa , Calafat Consuelo
Published: February 2021

Tras cinco años (septiembre 2015) desde que se estableció el acuerdo de Naciones Unidas “Transformar nuestro mundo: la Agenda 2030 para el Desarrollo Sostenible”, la universidad se ha convertido en un canal idóneo para transmitir el conocimiento de los Objetivos de Desarrollo Sostenible (ODS), bajo el lema de “no dejar a nadie atrás” proponen erradicar la pobreza, reducir las desigualdades y cuidar el medio ambiente. Siguiendo con las recomendaciones de la CRUE sobre la necesidad de las universidades de realizar reflexiones estratégicas en materia de integración de ODS en la política universitaria, es necesario incluir estos conceptos en las materias del grado de Administración y Dirección de Empresas (ADE). En este contexto, las asignaturas de microeconomía y macroeconomía, ambas pertenecientes al área de Economía Aplicada del grado de ADE, resultan idóneas para instruir a sus estudiantes en determinados ODS. El objetivo del artículo es introducir innovación docente relacionando algunos ODS con los temas de los programas de microeconomía y macroeconomía. Teniendo en cuenta que microeconomía es una materia centrada en el comportamiento del consumidor, el productor y el Estado, está relacionada con los ODS: (7) “Energía asequible y no contaminante”, (9) “Industria, innovación e infraestructuras” y (12) “Producción y consumo responsable”. Mientras que la asignatura de macroeconomía tiene una visión más global del país, donde se analizan políticas económicas vinculadas con los siguientes ODS: (8) “Trabajo decente y crecimiento económico”, (10) “Reducción de las desigualdades” y (12) “Producción y consumo responsable”. El resultado del aprendizaje consistirá en conseguir que los graduados en ADE adquieran conocimientos sobre determinados ODS y tengan las capacidades necesarias para implementarlos en la empresa donde trabajen en un futuro.
Modelando matemáticamente el teorema de Bayes para investigar el origen de un incendio forestal
Authors: Boigues Francisco J , Estruch Vicente D. , Vidal-Meló Anna
Published: February 2021

La modelización matemática (MMT) es un elemento básico para enseñar matemáticas en ingeniería. Las fases de la MMT serían traducir el problema real a un problema matemático, resolver el problema, interpretar el resultado en clave real y finalmente validarlo. La probabilidad bayesiana es uno de los tópicos que el futuro ingeniero encuentra en su formación. Desde ese enfoque la probabilidad tiene un carácter subjetivo, ya que irá cambiando en la medida que encontremos evidencia que la modifiquen. En esta comunicación mostraremos un proyecto donde el enfoque Bayesiano se utiliza, con la ayuda de MATLAB, para establecer criterios de búsqueda del origen de un incendio forestal. La traducción matemática pasa por identificar la zona quemada con una matriz inicial que fija las probabilidades a priori de que cada zona sea el origen del incendio. A partir de un método de búsqueda, con determinada eficacia de detectar el origen del incendio, y con la ayuda del teorema de Bayes, obtendremos las nuevas probabilidades del origen del incendio, probabilidades a posteriori. Se puede comprobar que si la investigación en una zona resulta negativa entonces la probabilidad a posteriori de que ese lugar sea el origen del incendio disminuye y, en cambio, la de las otras zonas no investigadas aumenta. También mostraremos los scripts de MATLAB que se han utilizado en todo el proceso de la MMT y sobre todo en la transformación de los números de las matrices en un mapa de colores que ayuda a visualizar la búsqueda del origen del incendio. Aunque los estudiantes que llevaron a cabo el proyecto mostraron una actitud positiva, también hay que resaltar que necesitan mayores bases teóricas para llevarlo a cabo y así como mejorar en el uso del MATLAB.
A música e as suas repercussões nas ordens sociais e mentais
Authors: Conceição Beatriz Licursi , Silva Levi Leonido , Cardoso Mário Anibal , Morgado Elsa Maria
Published: February 2021

Foi objetivo geral desse artigo, compreender como a música repercute nas ordens sociais e mentais dos homens. Foi realizada uma revisão de literatura e os dados foram interpretados pelo método qualitativo. Concluiu-se que a música tem grande repercussão na vida social humana, pois os ajuda a manter a capacidade de se conectar com os sistemas emocionais profundos, gerando sentimentos relacionados à capacidade de inter-relações sociais e atividades em equipe. Ouvir música cria estímulos nas áreas do cérebro que são comumente ativadas para entender os sentimentos subjetivos e os pensamentos de outras pessoas.
Mitigating deficiencies of generation Z through new educational methodologies in a business statistic course
Authors: Pinar-Pérez Jesús María , Morales-Arsenal Roberto , Fernandez-Moya María , Cuadros-Solas Pedro , Salvador Carlos
Published: February 2021

Nowadays, most of the students in first course at University are from the so-called Generation Z. Since a young age, these students have been used digital technology such as internet, mobile phones, tablets and laptops developing certain skills. But a large majority of these students have some deficiencies such as low knowledge of mathematics, scarce levels of motivation, concentration or logical reasoning and little patience (they want to understand everything quickly). These characteristics must be improved being a hard work to do by teachers. New educational methodologies are being adapted taking into account these digital skills and mitigating the deficiencies observed in some students. This paper presents an analysis of the impact of using new methodological techniques in a business statistics course. The work focuses on the problem of increase the student´s motivation through the use of new digital tools such as video-lessons, screencasts and flipped classroom combined with neuroeducation techniques. Our hypothesis is mitigating the deficiencies of students through increasing their motivation. A multiple linear regression model to a set of students is carried out. Empirical results show, in general, that females take advantage of this methodology implemented better than males. Moreover, students with “good” performance reach better outputs (higher final score and a deeper knowledge of the subject) if additional methodological tools are implemented in the traditional class. While, there is not improvement for “bad” students.
Acessibilidade no turismo e hotelaria: desafios contemporâneos
Authors: Sousa Jenny Gil , Mangas Catarina
Published: February 2021

Na sociedade contemporânea, o turismo detém uma ligação muito estreita com a realização pessoal e o bem-estar dos indivíduos, convertendo-se numa prática social e cultural, que movimenta milhões de pessoas em todo o mundo. No entanto, e apesar da crescente democratização, este fenómeno ainda não é para Todos. São muitos os cidadãos que pelas suas caraterísticas e incapacidades se veem impossibilitados de usufruir, de forma equitativa, dos espaços e dos equipamentos turísticos, designadamente hoteleiros. Neste exercício de massificação do turismo, as pessoas com deficiência surgem enquanto segmento do mercado ainda pouco contemplado, mas cada vez mais emergente e exigente. Com efeito, as pessoas com deficiência procuram um nível de autonomia cada vez maior e, neste quadro, as unidades hoteleiras veem-se perante um novo paradigma que as desafia, dentro daquilo que é também a rentabilidade financeira e o aumento de valor, a criar ambientes integradores e seguros que possam ser utilizados por todas as pessoas, na sua maior extensão possível. Falamos, pois, da criação de ambientes que respeitem os princípios do Desenho Universal, que no contexto da hotelaria diz respeito a muito mais do que a simples adaptação de espaços físicos para pessoas com deficiência, mas antes ao planeamento de todos os aspetos da vida do hotel. Face ao exposto, com este trabalho, pretendemos realizar uma reflexão teórica que, cruzada com uma análise de natureza mais prática, estimule o debate e aumente o conhecimento sobre a importância do Desenho Universal no âmbito de uma hotelaria realmente para Todos, numa perspetiva de oportunidade de rentabilização e vantagem competitiva.
Factores de involucración del alumnado en la docencia semipresencial de un máster posgrado. Influencia de las características del alumnado en su involucración emocional
Authors: Galan-Cubillo Javier , Garcia-Ortega Beatriz , De-Miguel-Molina Blanca
Published: February 2021

En este artículo se analizan las características del alumnado que propician una mayor o menor involucración emocional en un contexto de enseñanza semipresencial de posgrado en el ámbito de la industria. En particular se consideran la experiencia profesional, la formación previa en la materia, motivaciones de aprendizaje, experiencias previas en docencia semipresencial, edad y sexo. Para ello se obtiene un feedback del alumnado (N=74) mediante una encuesta con escala de Likert. Los resultados muestran que la experiencia profesional en el sector y la formación previa, así como las motivaciones de aprendizaje son las que condicionan de forma significativa la involucración emocional del alumnado en este contexto.
Experiencias de docencia con Microsoft Teams para impartir prácticas informáticas usando software instalado en PoliLabs durante el periodo de COVID-19
Authors: Juste Vidal Belén , Miró Rafael , Mayo Patricia , Verdú Gumersindo , Ortiz Josefina
Published: February 2021

La presente ponencia pretende exponer las experiencias surgidas durante la impartición de prácticas informáticas online a través de la herramienta Microsoft Teams en la Universitat Politècnica de València, a raíz de la etapa de confinamiento por COVID-19. El trabajo dará a conocer los retos, beneficios y conclusiones al respecto. La asignatura “Radioterapia y Protección Radiológica” de 2º de Grado en Ingeniería Biomédica cuenta con tres prácticas. La tercera de ellas, consiste en establecer una planificación en radioterapia utilizando diferentes softwares médicos. Para impartir esta práctica, se ha usado la herramienta educativa Teams (asociada al paquete informático Office 365 de Microsoft) para la comunicación con el profesor, y por otro lado, el uso de la plataforma Polilabs de la UPV para que los alumnos puedan acceder a los softwares correspondientes. El conjunto de estas dos herramientas permite impartir prácticas informáticas virtuales, gestionadas por el docente, donde los alumnos y el profesor pueden compartir distintos tipos de materiales de clase (documentos, apuntes, vídeos, imágenes, screencasts, cuestionarios…), además de mantener conversaciones interactivas, mandar tareas y realizar actividades de evaluación. Esta ponencia se centrará en ofrecer las conclusiones de esta experiencia pedagógica basada en el sentido de comunidad, la participación y la apertura y será discutido como muy significativo en la configuración de una mejor experiencia educativa de aprendizaje a distancia para el futuro.
Tecnologías digitales innovadoras para el diseño de exoesqueletos para la mano aplicados en la rehabilitación de pacientes con artritis crónica
Authors: Magal-Royo Teresa , Moya-Jiménez Roberto , Ponce Diana
Published: February 2021

El artículo describe la metodología planteada  en el diseño de creación de un prototipo de exoesqueleto para la rehabilitación de la artritis reumatoide enfermedad inflamatoria, sistémica y crónica que afecta principalmente al sistema osteomuscular de pies, manos y que desemboca a la larga, en una discapacidad funcional severa. La propuesta de diseño del exoesqueleto de la mano descrito en el artículo tiene en cuenta los accionamientos mecánicos aplicados sobre las articulaciones mediante el uso de servomotores conectados a hilos tensores que permiten el movimiento de flexo-extensión correcto de los dedos. Se propone un planteamiento sistémico en la creación del prototipo final considerando los parámetros de esfuerzos y movimientos que se utilizan normalmente en la rehabilitación convencional y la creación de un dispositivo generado con técnicas de prototipado rápido de la mano tratada que permita diseñar un exoesqueleto único y exacto basado en las características antropométricas de cada paciente. El resultado final ha permitido validar y verificar el proceso de desarrollo innovador de técnicas relacionadas con el Diseño Asistido por Ordenador, DAO y el Prototipado Rápido PR.
Aprendizaje mediante el ejercicio práctico de actividades en asignaturas de ciencias agrarias
Authors: López Cortés Isabel , Velázquez-Martí Borja , Vinueza-Villares Viviana Vanesa , Salazar Herbabdez Domingo M
Published: February 2021

En este trabajo se presenta la experiencia de la aplicación de una metodología de enseñanza-aprendizaje basada en prácticas en asignaturas de temática agrícola y agroindustrial. Ésta consistió en dedicar un 70% de las horas a prácticas de campo y laboratorio, y un 30% de contenidos teóricos. Los contenidos teóricos fueron dirigidos a lecturas de bibliografía que después se exponen en foros antes de la aplicación de la práctica. Las practicas se centraron en experimentar procesos propios de cada cultivo, tales como diferenciación de especies, técnicas de siembra y plantación, reconocimiento de plagas y enfermedades, técnicas de poda, realización de injertos etc. En las asignaturas de agroindustria, tales como aprovechamiento energético de la biomasa, las practicas se orientaron a ejercicios de laboratorio para calcular proiedades de la materia biocombustibles, tales como el poder calorífico, composición de CHN, cenizas etc. La evaluación se realiza de forma tradicional, mediante exámenes parciales y final. También se evalúan las memorias de prácticas. Los resultados obtenidos durante dos años mostraron un aumento de la puntuación de la valoración de la asignatura en las encuestas institucionales. El nivel de aprobados por curso aumentó alrededor de un 10%. Además se realizaron entrevistas para indagar en los aspectos relevantes de la técnica, realizando los alumnos análisis DAFO (Debilidades, Amenazas, Fortalezas, Oportunidades). Entre las debilidades más relevantes se muestra la exigencia de ir a clase para seguir bien el método diseñado de aprendizaje.