bluuebunny/crossref_metadata_2025 huggingface dataset:
Para repensar o cânone: "Pensamento fronteiriço" e distribuição geopolítica da produção intelectual
Authors: Oliveira Maria Aparecida Cruz de
Published: February 2021

Through Walter D. Mignolo’s (2003) concept of “border thinking”, I discuss the urgency of the observation that the valuation of the object of knowledge and art, like literature, is not associated with the predications of the object itself, but exclusively in relation to the place of enunciation (from where the discourse comes from and who formulates it). In a context of coloniality of knowledge, it is the self of discourse that indicates the value of the artistic and scientific object and, consequently, establishes the distribution of the legitimate place of production. And it is obvious that in the history of artistic and scientific production, the place of enunciation allowed has always been the First World, where art and science have always been produced by whites, more specifically, white men. The idea is also to show how Ana Maria Gonçalves in Um defeito de corquestions the literary canon through a poetics with epistemic diversity and how it becomes the place for the production of “another thought” (border thinking).
Maria Firmina dos Reis: a fundadora negra de outra tradição literária brasileira
Authors: Miranda Fernanda Rodrigues de
Published: February 2021

In this paper we analyze the work Úrsula (1859), by Afro-Brazilian writer Maria Firmina dos Reis, pioneer in the publication of the novel and the abolitionist content in Portuguese-language fiction. Through some general lines about the context of the work, the observation of the preface and the constitution of black characters, the objective is to highlight the extent to which the work operates a fracture to the colonial order as a unique framework for black people, establishing a new tradition in Brazilian literature
O vulto da Bahia e o lugar da mulher: Maria Quitéria/Soldado Medeiros no carnaval carioca
Authors: Maia Helder Thiago
Published: February 2021

Neste artigo, analiso a presença de Maria Quitéria de Jesus/Soldado Medeiros na cultura brasileira a partir de doze sambas-enredos de Escolas de samba do Rio de Janeiro e de seus respectivos desfiles, entre os carna-vais de 1954 e 2020. Com base no material encontrado e nas análises realizadas, podemos dizer que há duas narrativas significativamente distintas sobre a personagem. Na primeira, entre as décadas de 50 e 70, há uma perspectiva militarizada, onde a personagem é construída a partir de sua capacidade guerreira e da sua atuação nas lutas de independência; na segunda, entre as décadas de 90 e 10, há uma perspectiva feminista, sendo a personagem construída a partir de sua capacidade de transgredir as normatividades de gênero.
Estratégias cimarronas para narrar a negritude no século XIX em "Autobiografía" de Juan Francisco Manzano (Cuba, 1835) e "Úrsula" (Brasil, 1859)
Authors: Silva Liliam Ramos da
Published: February 2021

This reflection will analyze the strategies used by two Latin American black writers to present the theme of blackness in the 19th century. On one side, the autobiography written by the cuban Juan Francisco Manzano (1835), the only autobiography text that shows one Latin American semiliterate slave black man that nar-rates your life in exchange for your liberty. On the other side the narrative written by Maria Firmina dos Reis, a free black woman considered the first female novelist in Brazil: Úrsula (1859), an abolitionist text whose main characters are white, surprises by giving voice to the slave people, who narrate their memories in Africa and are aware of their condition. Theoretical references will be used about the novel as a form of projection of an ideal future (Sommer, 2004), abolitionist texts as thesis novel (Jeffers, 2013), mask of speechlessness (Kilomba, 2019) and cimarronagem’s pedagogy (Mendes, 2019) intending to revise the Latin American literary canon in an inclusion proposal the two narratives to mandatory readings in the Litera-ture studies in the Latin American universities.
Patricia López-Gay. Ficciones de verdad. Archivo e narrativas de vida
Authors: Welge Jobst
Published: February 2021

Some of the most interesting narrative literature recently produced in Spain is distinguished by the incorporation of auto- or bio-fictional elements (for instance, Miguel Ángel Hernández, El dolor de los demás [2018]; Pablo Martín Sánchez, Diario de un viejo cabezota [2020]). Not surprisingly, this ‘trend’ has already led to many academic studies on different aspects of autobiographical fiction. The new book by Patricia López-Gay is an extremely valuable contribution to this field, since it charts in a convincing and sophisticated manner the specifically Spanish genealogy and phenomenology of this literary tendency, covers the work of representative writers in a synthetic fashion, and develops an original argument about the intersection of auto-fictional prose and the narrative configuration of the archive.
Patients with Protein-Truncating PKD1 Mutations and Mild ADPKD
Authors: Lanktree Matthew B. , Guiard Elsa , Akbari Pedram , Pourafkari Marina , Iliuta Ioan-Andrei , Ahmed Syed , Haghighi Amirreza , He Ning , Song Xuewen , Paterson Andrew D. , Khalili Korosh , Pei York P.C.
Published: February 2021

Background and objectives

Progression of autosomal dominant polycystic kidney disease (ADPKD) is highly variable. On average, protein-truncating PKD1 mutations are associated with the most severe kidney disease among all mutation classes. Here, we report that patients with protein-truncating PKD1 mutations may also have mild kidney disease, a finding not previously well recognized.

Design, setting, participants, & measurements

From the extended Toronto Genetic Epidemiologic Study of Polycystic Kidney Disease, 487 patients had PKD1 and PKD2 sequencing and typical ADPKD imaging patterns by magnetic resonance imaging or computed tomography. Mayo Clinic Imaging Classification on the basis of age- and height-adjusted total kidney volume was used to assess their cystic disease severity; classes 1A or 1B were used as a proxy to define mild disease. Multivariable linear regression was performed to test the effects of age, sex, and mutation classes on log-transformed height-adjusted total kidney volume and eGFR.

Results

Among 174 study patients with typical imaging patterns and protein-truncating PKD1 mutations, 32 (18%) were found to have mild disease on the basis of imaging results (i.e., Mayo Clinic Imaging class 1A–1B), with their mutations spanning the entire gene. By multivariable analyses of age, sex, and mutation class, they displayed mild disease similar to patients with PKD2 mutations and Mayo Clinic Imaging class 1A–1B. Most of these mildly affected patients with protein-truncating PKD1 mutations reported a positive family history of ADPKD in preceding generations and displayed significant intrafamilial disease variability.

Conclusions

Despite having the most severe mutation class, 18% of patients with protein-truncating PKD1 mutations had mild disease on the basis of clinical and imaging assessment.

Podcast

This article contains a podcast at https://www.asn-online.org/media/podcast/CJASN/2021_02_18_CJN11100720_final.mp3
РАЗРАБОТКА И ИЗГОТОВЛЕНИЕ МИКРОМОДУЛЕЙ И СИСТЕМ В КОРПУСЕ НА БАЗЕ ТЕХНОЛОГИИ LTCC С УЧЕТОМ СПЕЦИФИЧЕСКИХ ОСОБЕННОСТЕЙ ИСПОЛЬЗУЕМЫХ МАТЕРИАЛОВ РАЗЛИЧНЫХ ПРОИЗВОДИТЕЛЕЙ
Authors: Косевский В.А. , Скрынник Е.А. , Кваша М.Ю.
Published: February 2021

В статье рассматриваются некоторые аспекты конструирования и примеры изготовления микромодулей и изделий типа «система в корпусе» (СвК) с учетом индивидуальных свойств систем материалов керамики низкотемпературного обжига от различных производителей. На реальных изделиях продемонстрирована необходимость учета специфических свойств материалов LTCC и их поведения в ходе выполнения технологических операций.
Atención y raciocinio visoespacial en jugadores de voleibol de alto rendimiento
Authors: Prado Serenini Antonio Luiz , M. Rueda Fabián J. , Arroyo Moreno Maria Perla
Published: February 2021

Este estudio tuvo como objetivo analizar las relaciones de la atención y el raciocínio visoespacial con el rendimiento deportivo, en el contexto de voleibol Participaron 159 jugadores de voleibol de alto nivel, de ambos sexos, con edad promedio de 21.60 años (DE= 4.11). Los instrumentos utilizados fueron la Bateria Psicológica de Evaluación de la Atención (BPA), Escala de Atención Selectiva Visual (EASV) y Test de los Cubos. El rendimiento deportivo fue medido utilizando el software Data Volley. Los resultados indican que los jugadores obtuvieron medias superiores a los patrones normativos de los manuales, en todas las pruebas, y sólo se encontraron correlaciones significativas entre los test y el rendimiento deportivo en el test BPA en la categoría juvenil, y en el Test de los Cubos en la categoría infanto. Los resultados de los test (BPA, EASV y Test de los Cubos) de forma general, y en categorías deportivas, no presentaron correlaciones significativas con el rendimiento deportivo.
A CRACK DETECTION SYSTEM FOR STRUCTURAL HEALTH MONITORING AIDED BY A CONVOLUTIONAL NEURAL NETWORK AND MAPREDUCE FRAMEWORK
Authors: Filatova Darya , El-Nouty Charles
Published: February 2021

The quickly expanded development of artificial intelligence offers alternative ways to solve numerous civil engineering problems. The work is devoted to the development of a computer-vision-based crack detection system capable to process big data related to pathology recognition. In this study, we discuss an automated crack type classification pipeline based on CNN deep learning algorithm and MapReduce framework. The results of numerical modeling illustrate the potential of the crack detection system.
JUSTIFICATION OF STRENGTHENING A SLIDING BRIDGE SUPPORT (ON THE EXAMPLE OF THE BRIDGE THROUGH THE R. IZHORA ON THE HIGH-SPEED ROAD SAINT PETERSBURG - MOSCOW)
Authors: Mangushev Rashid , Nikitina Nadezhda , Osokin Аnatolii , Polunin Viacheslav , Zavodchikova Maria
Published: February 2021

The article describes the experience of strengthening the foundations of the bridge support laying on a landslide slope. The bridge under consideration crosses the river Izhora in the Leningrad region. Numerical modeling of the process of development of support deformations is carried out. Analysis of the calculations showed that the development of the landslide process occurred as a result of waterlogging of the soil massif and soaking of soils at the base of support No. 10. Structural strengthening of the support in the form of buttresses was developed and numerically substantiated to eliminate deformation of the bridge support.
DURABILITY ASSESSMENT OF BENDING STRUCTURES MADE OF NONLINEAR ELASTIC MATERIAL
Authors: Petrov Vladilen , Mishchenko Roman , Pimenov Dmitry
Published: February 2021

Experimental studies and field tests indicate that the effect of corrosive media leads to significant changes in the physical and mechanical characteristics of structural materials. The article proposes a mathematical model that allows predicting the negative impact of aggressive media and assessing the durability of bent structures.
GDPR implementation in public administrationin Poland – 1.5 year after: An empirical analysis
Authors:   Department of Computer Science in Economics, Lisiak-Felicka Dominika ,   Faculty of Economics and Sociology,   University of Lodz, Lodz, Poland, Szmit Maciej ,   Department of Computer Science; Faculty of Management; University of Lodz, Lodz, Poland
Published: February 2021

Aim/purpose – The paper contains descriptive exploratory research on the implementa- tion of General Data Protection Requirements (GDPR) in a group of Polish public ad- ministration offices. The purpose of this research is to investigate the current state of personal data protection in the entities surveyed. Design/methodology/approach – The diagnostic survey method using the Computer Assisted Web Interview was employed. The survey was conducted in local government administration offices a year and a half after the GDPR implementation. Findings – All marshal offices and the majority of districts (about 80%) confirmed that they comply with all the GDPR requirements. The situation was slightly worse in munic- ipal offices – about 23% of them declared that they do not comply with all the GDPR requirements. In officials’ opinion this situation may be improved by conducting training for employees, employee engagement, and appropriate support of the office manage- ment. Another aspect that draws attention is a very small budget dedicated to the GDPR implementation and maintenance in most of the offices surveyed. Research implications/limitations – The limitation of the findings is the relatively low responsiveness of the questionnaire survey. Originality/value/contribution – The research concerns a relatively new subject. The state of personal data protection in public administration in Poland after 18 months of the GDPR implementation was analyzed. So far, there is no comprehensive research that has been conducted into this field in local government administration. Keywords: General Data Protection Regulation (GDPR), public administration, personal data, GDPR implementation, data protection breaches. JEL Classification: M15, H83, K24.
Análisis de las competencias núcleo y el desarrollo empresarial en las MIPES: estudio de caso
Authors: Neme-Castillo Omar , Valderrama-Santibáñez Ana Lilia , Chiatchoua Cesaire
Published: February 2021

El documento identifica las competencias núcleo, entendidas como base de la ventaja competitiva, de una muestra de micro y pequeñas empresas de Iztapalapa en la Ciudad de México. Se sigue una doble metodología. Primero, se evalúan atributos de unicidad, colectividad y flexibilidad estratégica de las capacidades; después, se estima un modelo de corte transversal para determinar su contribución en el desarrollo empresarial. Para el sector industrial se establecen a los procesos y compras como competencias núcleo y ventas y marketing para los servicios. Se estima que estas competencias contribuyen a mantener bajos costos, a un rápido ajuste y al aumento de ventas e ingresos en el sector industrial y a la reducción de efectos negativos externos, implicando una pronta respuesta y un incremento de ventas e ingresos en el sector servicios. Los resultados sientan bases para el diseño de políticas de fomento de este grupo de empresas con carácter sectorial a través del impulso de competencias núcleo. Es necesario el diseño de programas de desarrollo de procesos de producción para empresas industriales con la esperanza de que configuren estructuras de costos por debajo del promedio. También es indispensable el diseño de programas de competencias en ventas y marketing para el sector de los servicios que minimicen los efectos negativos de competidores de mayor tamaño.
Writing Tips for Your Next Research Article
Authors: Cavalleri Matteo
Published: February 2021

An academic article is often regarded just as an archival device
for storing a completed research program. Actually, a successful paper
is also the blueprint for planning your research in progress. We will
discuss how to write articles that not only successfully navigate the
peer-review process, but are also discovered, read, cited, and make an
impact in the research community.
Flood disasters and social resilience during the decline of the Qing Dynasty: case studies of 1823 and 1849
Authors: Hao Zhixin , Xiong Dangyang , Zheng Jingyun
Published: February 2021

Based on historical records and crop harvest scores extracted from
historical documents, this study reconstructed the spatial-temporal
distribution and severities of floods in the Yangtze-Huai River valley
in 1823 and 1849. We also summarized the effects of the floods on
society and identified government measures taken to cope with the floods
in the context of the economic recession in the period of 1801–1850.
The 1823 flood, which was caused by the heavy precipitation of the Meiyu
period and typhoons, severely affected areas in the lower reaches of the
Yangtze River. Meanwhile, the 1849 flood, triggered by long-term,
high-intensity Meiyu precipitation in the middle and lower reaches of
the Yangtze River, mainly affected areas along the Yangtze River. The
1849 disaster was more serious than the one in 1823. In the lower
reaches of the Yangtze River, the 1849 flood caused the worst
agricultural failure of the period 1730–1852. To deal with the
disasters, the Qing government took relief measures, such as exempting
taxes in the affected areas, distributing grain stored in warehouses,
and transferring grain to severely afflicted areas. These relief
measures were supplemented by auxiliary measures, such as exempting
commodity taxes on grain shipped to disaster areas and punishing
officials who failed to provide adequate disaster relief. The flood
disasters disrupted the water system of the Grand Canal and forced the
Qing government to transport Cao rice by sea beginning in 1826. This
laid the groundwork for the rise of coastal shipping in modern China.
With the economic recession of the 19th century, Chinese society was not
as resilient to floods as it was in the 18th century. Compared to
droughts, floods are more difficult to deal with and pose greater
threats to infrastructure and to normal life and work in the cities.
CT in every step: Long COVID
Authors: Aydin Sonay , Unver Edhem , Karavas Erdal , Yalcin Seven , Kantarci Mecit
Published: February 2021

Background and aim: Some patients continue to experience symptoms
related to COVID-19 after the acute phase of infection. Imaging studies,
especially chest computerized tomography (CT), has been gaining
importance from the beginning of the pandemic with its ability of
diagnosing COVID-19, assessing the extent of pulmonary involvement,
predicting disease severity. We intend to define the frequency of
persistent symptoms and correlate the presence of persistent symptoms
with laboratory findings and CT severity levels. Methods and Materials:
We tried to patients who had been discharged from the study hospital
after the treatment and who had a positive nasopharyngeal swab result
for SARS-CoV-2, after at least four weeks from the initial diagnosis.
The patients were questioned for the presence of persisting symptoms. In
addition to demographic data, laboratory results and CT severity levels
were recorded. Results: 116 patients were included into the study. 61
patients reported at least one persisting symptom (52.5%). Mean age of
the population is 48.90±17.74 years. Shortness of breath, chest pain,
cough, muscle weakness, dizziness, headache, fatigue, and palpitation
were found as persisting symptoms. Mean CT severity score value of the
population is 3.80±0.38. Mean CT severity score value is lower in
patients without any persistent symptoms. Conclusion: CRP, fibrinogen
levels, anemia and female gender were associated with some of the
persistent symptoms. CT severity, as being a successful predictor for
disease severity/prognosis, is also related with future long COVID
presence, and CT severity is related with more persistent symptoms than
laboratory parameters.
Contrasting demographic histories revealed in two invasive populations of the dry rot fungus Serpula lacrymans
Authors: Skrede Inger , Murat Claude , Hess Jaqueline , Maurice sundy , Sønstebø Jørn Henrik , Kohler Annegret , Barry-Etienne Dominique , Eastwood Dan , Högberg Nils , Martin Francis , Kauserud Håvard
Published: February 2021

Globalization and international trade have impacted organisms around the
world leading to a considerable number of species establishing in new
geographic areas. Many organisms have taken advantage of human-made
environments, including buildings. One such species is the dry rot
fungus Serpula lacrymans, which is the most aggressive wood-decay
fungus in indoor environments in temperate regions. By using population
genomic analyses of 36 full genome sequenced isolates, we revealed that
isolates from Europe and Japan are highly divergent and that these
populations split 3,000 - 19,000 generations ago, probably predating
human influence. Approximately 250 generations ago, the European
population went through a tight bottleneck, likely corresponding to the
time it colonized the built environment. Moreover, evidence of admixture
between European and Japanese populations was shown in an isolate from
New Zealand. Genomic analyses revealed that low differentiation appeared
in genes with functions related to of growth and intracellular
transport, possibly important to its ability to effectively decay large
substrates. These functions may have enabled both populations to
independently establish in the human-made environment. Further,
selective sweep analyses identified rapid changes in genes possibly
related to decay of various substrates in Japan and in genes involved
DNA replication and protein modification in Europe. These two fungal
populations were preadapted to the built environment, but have more
recently and independently adapted to their local environment.
Prey preferences of the chimpanzee (Pan troglodytes)
Authors: Bugir Cassandra , Butynski Thomas , Hayward Matthew
Published: February 2021

Chimpanzees Pan troglodytes are the closest extant relative of modern
humans, and are often used as a model organism to help understand
prehistoric human behavior and ecology. Originally presumed herbivorous,
chimpanzees have been observed hunting 24 species of birds, ungulates,
rodents, monkeys, and other primates, using an array of techniques from
tools to group cooperation. Using the literature on chimpanzee hunting
behavior and diet from 13 studies, we aimed to determine the prey
preferences of chimpanzees. We extracted data on prey-specific variables
such as targeted species, their body weight, and their abundance within
the prey community, and hunter-specific variables such as hunting
method, and chimpanzee group size and sex ratio. We used these in a
generalized linear model to determine what factors drive chimpanzee prey
preference. We calculated a Jacobs’ Index value for each prey species
killed at two sites in Uganda and two sites in Tanzania. Chimpanzees
prefer prey with a body weight of 7.6 ± 0.4 kg or less, which
corresponds to animals such as juvenile bushbuck Tragelaphus scriptus
and guereza colobus monkeys Colobus guereza. Sex ratio in chimpanzee
groups appears to drive chimpanzee prey preference, where chimpanzees
increasingly prefer prey when in male-dominated groups. Prey preference
information from chimpanzee research can assist conservation management
programs by identifying key prey species to manage, as well as
contribute to a better understanding of the evolution of human hunting
behavior.
Predictive factors facilitate identification of potential aortic dissection in patients with obstructive sleep apnea syndrome
Authors: wu dinghui , Jiang Dandan , Chen Qu , yao xiangyang , dong chunping , su weiming
Published: February 2021

Objective: Investigating potential predictors of aortic dissection
development in high-risk hypertensive patients with obstructive sleep
apnea syndrome (OSAS). Methods: Hypertensive patients with aortic
dissection, admitted to hospital between January 2010 and July 2020, was
diagnosed with OSAS by overnight sleep study with polysomnography (PSG).
Results: Male was liable to aortic dissection compared to female in both
groups（84.7% and 86% respectively）.There were actually significant
differences with regard to neutrophil to lymphocyte ratio (NLR),
platelet to lymphocyte ratio (PLR), mean platelet volume (MPV) /
platelet count (PLT) ratio and D-dimer that we concerned about and were
of great value in aortic dissection as previously reported. As
multivariable regression analysis revealed, NLR (odds rate [OR],
2.258, 95% confidence interval [CI], 1.464-3.482,
P<0.05), MPV/PLT (OR, 2.743, 95%CI, 1.713-4.392,
P<0.05) and apnea and hypopnea index (AHI) (OR, 1.746,95% CI,
1.225-1.320, P<0.05) were all independent risk factors for
aortic dissection. receiver operating characteristic curves analysis of
NLR, MPV/PLT, AHI and combination of indicators for aortic dissection
revealed combination of NLR, MPV/PLT ratio and AHI is of outstanding
predictive value with sensitivity of 0.904 and specificity of 0.847. At
the thresholds of 4.41 for NLR and 5.14 for MPV/PLT and 35.95 for AHI,
87.5% of all studied patients were expected to be correctly diagnosed
with regard to aortic dissection. Conclusion: Inflammation, platelet
alteration is crucial for initiation and progression of aortic
dissection. Combined detection of NLR, MPV/PLT ratio and AHI could
assist sleep physicians to identify silent or potential aortic
dissection in patient comorbidity OSAS and hypertension.
How resilient is Calluna vulgaris to drought during germination and its seedling stage?
Authors: Birkeli Kristine , Gya Ragnhild , Haugum Siri , Velle Liv Guri , Vandvik Vigdis
Published: February 2021

The coastal heathlands of North-west Europe are valuable cultural
landscapes, created and maintained over millennia by a land-use regime
involving burning and grazing. These heathlands are now critically
threatened throughout their range by land-use change and, increasingly,
climatic changes. The climatic change impacts are complex, as the
coastal heathland regions are experiencing increased temperature and
precipitation, but also increased frequency and severity of extreme
events, such as drought. Previous studies reveal that established
heathland vegetation, including Calluna, are vulnerable to drought, but
also that these vulnerabilities vary throughout the range, and with
successional stage after fire. Recruitment from seed is an important
regeneration strategy for Calluna heathland vegetation after burning,
and our study is the first to assess how the seed germination and early
seedling growth of Calluna respond to drought. We will do this in a lab
germination experiment, where we will expose Calluna seeds to five
different drought treatments, from -0.25 MPa to -1.7 MPa, and measure
germination, and record germination percentage, germination rates, and
seedling growth, below-ground allocation, and functional traits
(Specific Leaf Area, Specific Root Length). To allow assessment of
variation in drought responses due to geographic origin, successional
stage, and the maternal plants’ drought exposure, we will conduct this
experiment on seeds from 540 Calluna plants sampled from across three
drought treatments (control, 50%, and 90% coverage), in three
successional stages after fire (pioneer, building, mature), in two
regions (60N, 65N), using a factorial design.
Feasibility of radical gastrointestinal tumor resection with simultaneous off-pump coronary artery bypass surgery for patients with severe heart problems: a retrospective cohort study from a single institutional database
Authors: Jiang Rongrong , Xiao Ziying , Huang Jiechun , Sun Xiaotian , Chu Xianglin , Wang Fangrui , Wang Yiqing , Pang Liewen , luo fen
Published: February 2021

Purpose: Clinical treatment of gastrointestinal neoplasms in patients
with severe coronary stenosis is difficult, and it remains controversial
to perform staged or simultaneous surgeries. The purpose of this study
was to retrospectively analyze the feasibility and indications for
simultaneous gastrointestinal tumor resection and off-pump coronary
artery bypass (OPCAB) graft surgery. Methods: Data collected from a
total of five patients, including three patients with gastric cancer and
two patients with colorectal cancer, who underwent simultaneous radical
cancer resection and OPCAB between September 2010 and October 2019, were
retrospectively analyzed. Among these patients, one had an incomplete
colonic obstruction. All patients had severe coronary stenosis, and one
experienced acute heart failure before surgery. OPCAB was performed
first, followed by the radical cancer resection. Results: All five
patients were discharged from hospital without perioperative death,
major cardiovascular events or anastomotic leakage. The mean
postoperative hospital stay was 9.4 days. One patient experienced slight
gastrointestinal bleeding after surgery, which improved with
conservative treatment. After a mean follow-up of 39 months, two
patients with gastric cancer died from tumor metastasis at 28 months and
37 months, while the remaining three patients did not have tumor
recurrence or metastasis. None of the patients experienced myocardial
ischemia. Conclusion: It is safe and feasible to perform simultaneous
OPCAB and gastrointestinal surgeries on the premise of strictly
controlling the indications for patients with gastrointestinal tumors
complicated with severe coronary artery stenosis.
Correction to: Solvability and stability of the inverse Sturm-Liouville problem with analytical functions in the boundary condition (Math. Meth. Appl. Sci. 43 (2020), no. 11, 7009-7021)
Authors: Bondarenko Natalia
Published: February 2021

This short note corrects minor mistakes in the original paper.
Opening a next-generation black box: ecological trends for hundreds of species-like taxa uncovered within a single bacterial >99% 16S rRNA operational taxonomic unit
Authors: Hahn Martin , Huemer Andrea , Pitt Alexandra , Hoetzinger Matthias
Published: February 2021

Current knowledge on environmental distribution and taxon richness of
free-living bacteria is mainly based on cultivation-independent
investigations employing 16S rRNA gene sequencing methods. Yet, 16S rRNA
genes are evolutionarily rather conserved, resulting in limited
taxonomic and ecological resolutions provided by this marker. We used a
faster evolving protein-encoding marker to reveal ecological patterns
hidden within a single OTU defined by >99% 16S rRNA
sequence similarity. The studied taxon, subcluster PnecC of the genus
Polynucleobacter, represents a ubiquitous group of planktonic
freshwater bacteria with cosmopolitan distribution, which is very
frequently detected by diversity surveys of freshwater systems. Based on
genome taxonomy and a large set of genome sequences, a sequence
similarity threshold for delineation of species-like taxa could be
established. In total, 600 species-like taxa were detected in 99
freshwater habitats scattered across three regions representing a
latitudinal range of 3400 km (42°N to 71°N) and a pH gradient of 4.2 to
8.6. Besides the unexpectedly high richness, the increased taxonomic
resolution revealed structuring of Polynucleobacter communities
by a couple of macroecological trends, which was previously only
demonstrated for phylogenetically much broader groups of bacteria. A
unexpected pattern was the almost complete compositional separation of
Polynucleobacter communities of Ca-rich and
Ca-poor habitats, which strongly resembled the
vicariance of plant species on silicate and limestone soils. The
presented new cultivation-independent approach opened a window to an
incredible, previously unseen diversity, and enables investigations
aiming on deeper understanding of how environmental conditions shape
bacterial communities and drive evolution of free-living bacteria.
Relationships between identities for quantum Bernstein bases and formulas for hypergeometric series
Authors: Zünacı Fatma , Goldman Ron , Simeonov Plamen
Published: February 2021

Two seemingly disparate mathematical entities - quantum Bernstein bases and
hypergeometric series - are revealed to be intimately related. The partition
of unity property for quantum Bernstein bases is shown to be equivalent to
the Chu-Vandermonde formula for hypergeometric series, and the Marsden
identity for quantum Bernstein bases is shown to be equivalent to the
Pfaff-Saalsch?tz formula for hypergeometric series. The equivalence of the
q-versions of these formulas and identities is also demonstrated.
Weak and strong convergence results for the modified Noor iteration of three quasi-nonexpansive multivalued mappings in Hilbert spaces
Authors: Chaolamjiak Watcharaporn , Khan Suhel , Hammad Hasanen , Dutta Hemen
Published: February 2021

The paper aims to present an advanced algorithm by taking help of the
Noor-iteration scheme along with the inertial technical term for three
quasi-nonexpansive multivalued in Hilbert spaces. A weak convergence theorem
under certain conditions has been given and added the CQ and shrinking
projection methods to our algorithm to obtain certain strong convergence
results. Furthermore, numerical experiments are provided by constructing an
example and comparison results have also been incorporated.
Bayesian and non-Bayesian estimation of four-parameter of bivariate discrete inverse Weibull distribution with applications to model failure times, football and biological data
Authors: Eliwa M.S. , El-Morshedy M.
Published: February 2021

In this paper we have considered one model, namely the bivariate discrete
inverse Weibull distribution, which has not been considered in the
statistical literature yet. The proposed model is a discrete analogue of
Marshall-Olkin inverse Weibull distribution. Some of its important
statistical properties are studied. Maximum likelihood and Bayesian methods
are used to estimate the model parameters. A detailed simulation study is
carried out to examine the bias and mean square error of maximum likelihood
and Bayesian estimators. Finally, three real data sets are analyzed to
illustrate the importance of the proposedmodel.
Fractional integral identity, estimation of its bounds and some applications to trapezoidal quadrature rule
Authors: Kashuri Artion , Awan Muhammad , Noor Muhammad
Published: February 2021

The aim of this paper is to introduce a new extension of preinvexity called
exponentially (m,?1,?2, h1,h2)-preinvexity. Some new integral inequalities
of Hermite-Hadamard type for exponentially (m,?1,?2,h1,h2)-preinvex
functions via Riemann-Liouville fractional integral are established. Also,
some new estimates with respect to trapezium-type integral inequalities for
exponentially (m,?1,?2,h1,h2)-preinvex functions via general fractional
integrals are obtained. We show that the class of exponentially (m,?1,?2,
h1,h2)-preinvex functions includes several other classes of preinvex
functions. We shown by two basic examples the efficiency of the obtained
inequalities on the base of comparing those with the other corresponding
existing ones. At the end, some new error estimates for trapezoidal
quadrature formula are provided as well. This results may stimulate further
research in different areas of pure and applied sciences.
Some properties of the generalized Fibonacci and Lucas numbers
Authors: Djordjevic Gospava , Djordjevic Snezana
Published: February 2021

In this paper we consider the generalized Fibonacci numbers Fn,m and the
generalized Lucas numbers Ln,m. Also, we introduce new sequences of numbers
An,m, Bn,m, Cn,m and Dn,m. Further, we find the generating functions and
some recurrence relations for these sequences of numbers.
Oscillations in difference equations with continuous time caused by several deviating arguments
Authors: Chatzarakis George , Péics Hajnalka , Roznjik Andrea
Published: February 2021

Sufficient conditions for the oscillation of all solutions of difference
equations with continuous time caused by several deviating arguments are
presented. Examples are provided to illustrate the results and compare them
to relevant results in the literature.
Digital co-Hopf spaces
Authors: Ege Ozgur , Karaca Ismet
Published: February 2021

In this work, we deal with co-Hopf space structure of digital images. We
prove that a pointed digital image having the same digital homotopy type as
a digital co-Hopf space is itself a digital co-Hopf space. We conclude that
a k-deformation retract of a digital co-Hopf space is a digital co-Hopf
space. We also show that the digital equivalences are digital co-Hopf
homomorphisms.
On Riemann-Stieltjes integral boundary value problems of Caputo-Riemann-Liouville type fractional integro-differential equations
Authors: Ahmad Bashir , Alsaedi Ahmed , Alruwaily Ymnah
Published: February 2021

Under different criteria, we prove the existence and uniqueness of solutions
for a Riemann-Stieltjes integro-multipoint boundary value problem of
Caputo-Riemann-Liouville type fractional integrodifferential equations. Our
results rely on the modern methods of functional analysis and are
well-illustrated with the help of examples. Some interesting observations
are also presented.
Weighted inequalities involving conformable integrals and its applications for random variable and numerical integration
Authors: Erden Samet
Published: February 2021

We establish new weighted inequalities for conformable integrals and
derivatives. Then, some results involving ?-fractional moments are
presented. Next, ?-fractional Uniform, Gamma and Weibull distribution are
defined and exclusive results by using these inequalities developed are
obtained. Also, some applications of obtained inequalities in numerical
integration are given.
Automorphisms and isomorphisms of enhanced hypercubes
Authors: Lu Lu , Huang Qiongxiang
Published: February 2021

Let Zn2 be the elementary abelian 2-group, which can be viewed as the vector
space of dimension n over F2. Let {e1,..., en} be the standard basis of
Zn2 and ?k = ek +...+ en for some 1 ? k ? n-1. Denote by ?n,k the
Cayley graph over Zn2 with generating set Sk = {e1,..., en,?k}, that
is, ?n,k = Cay(Zn2,Sk). In this paper, we characterize the automorphism
group of ?n,k for 1 ? k ? n-1 and determine all Cayley graphs over Zn2
isomorphic to ?n,k. Furthermore, we prove that for any Cayley graph ? =
Cay(Zn2,T), if ? and ?n,k share the same spectrum, then ? ? ?n,k. Note
that ?n,1 is known as the so called n-dimensional folded hypercube FQn, and
?n,k is known as the n-dimensional enhanced hypercube Qn,k.
Calidad y satisfacción de los servicios escolares de una institución de educación superior mexicana: la visión de los estudiantes
Authors: Patrón-Cortés Roger Manuel
Published: February 2021

La presente investigación se realizó en el departamento de Servicios Escolares (SE) de una institución de educación superior ubicada en México y tuvo como objetivo medir la calidad del servicio ofrecido desde la percepción de los estudiantes. Este estudio, por tanto, fue exploratorio y descriptivo; primero se realizó una medición cuantitativa y posteriormente se aplicaron entrevistas cualitativas mediante la técnica de grupos focales. Los resultados indican que el servicio que ofrece el departamento de SE es de adecuada calidad, de acuerdo con la percepción de los estudiantes. Las calificaciones más bajas se presentan en las dimensiones capacidad de respuesta y empatía, ya que prevalece como principal inconveniente la actitud que asume una parte del personal del departamento de SE, caracterizada en ocasiones por la falta de amabilidad, disposición y tiempo de respuesta. Se requiere, por tanto, que los administradores inspiren en estos empleados el significado y la importancia que tiene el servicio a los estudiantes, plasmados en su misión, visión y objetivos. Por eso, se propone que la institución fomente una cultura de sensibilidad del servicio, apoyada en la teoría del comportamiento organizacional, en donde todos los trabajadores sean amigables, corteses, accesibles y expertos. Asimismo, se recomienda establecer un sistema de evaluación constante en la institución para determinar los niveles de satisfacción en beneficio de la calidad de los servicios escolares ofrecidos.
Peningkatan Hasil Belajar Konfigurasi Elektron dengan Menggunakan KIT SELECTION (Smart Electron Configuration)
Authors: Fernanda Anisa , Enawaty Eny , Rasmawan Rahmad
Published: February 2021

This research was motivated by the low learning outcomes of students on the electron configuration subject matter at SMA negeri 2 Sungai Raya. This research aims to determine whether there was a difference in student learning outcomes between those who were given learning using KIT Selection media and those not on the electron configuration subject matter. Quasi experimental in the form of pretest-posttest control group design in the type of this study. The sample of this study were X IPA 2 as the control class and X IPA 3 as the experiment class. In experiment class, cooperative learning assisted by KIT Selection was given, whereas cooperative learning without KIT Selection was applied in control class. The result of U-Mann Whitney Test showed that the significant value of 0,004 < 0,05. Based on this result, it can be concluded that there was differences in learning outcomes between those who were given learning using KIT Selection media and those not on the electron configuration subject matter. The result of the Effect Size KIT Selection is 1,01 which is categorized as high and has an effect on learning outcomes by 34,38%.
Analisis Pemanfaatan Media Daring dalam Pembelajaran Matematika Ditinjau dari Kemandirian Belajar Siswa di Kelas XI SMAN 1 Koto Balingka
Authors: Armiati Armiati , Yanrizawati Yanrizawati
Published: February 2021

Covid pandemic 19 has had a huge impact on education. Large-scale social restrictions make learning only possible at home. Teachers must have alternative means so that learning can be carried out so that learning objectives can be achieved properly. One of the learning media that can be used is learning media through the internet network (online). Online media that can be used include whatsapp, google classroom, zoom, etc. The purpose of this study is to see whether learning through online media can be carried out well in class XI of SMAN 1 Koto Balingka. This research is a descriptive study, literature study and survey method through the analysis of learning documents such as assignments and achievement of students carrying out the tasks given through whatsapp online media. The results of this study are through analysis it can be seen that learning conducted through online is less well implemented because of the internet network constraints where students live less well and burdened students with internet quotas and the still presence of students do not yet have the means for online learning.
Kemampuan Penalaran Mahasiswa saat Memecahkan Masalah pada Mata Kuliah Telaah Kurikulum Matematika Sekolah Menengah
Authors: Aziz Saddam Al , Azmar Ali , Ahmad Defri , Tasman Fridgo , Rifandi Ronal
Published: February 2021

This study aims to analyze the mathematical reasoning abilities of students in the mathematics education study program in the secondary school mathematics curriculum review course. This research was conducted by giving quiz questions in the form of descriptions to a class of students who were then analyzed the answers. The results of the student's answer analysis show that the students' mathematical reasoning ability is still low. The low level of students' mathematical reasoning skills in general lies in the ability of students to analyze problems, make conjectures, determine relationships between variables, and identify links between processes or concepts in a given case. So that many answers from students are not logical and wrong in concluding.
Kesepian dan Problematic Internet Use pada Mahasiswa
Authors: Rinaldi Martaria Rizky
Published: February 2021

Penelitian ini bertujuan untuk mengetahui hubungan antara kesepian dengan problematic internet use pada mahasiswa. Hipotesis dalam penelitian ini yaitu terhadap hubungan positif antara kesepian dengan problematic internet use pada mahasiswa. Subjek penelitian ini berjumlah 120 mahasiswa. Pengambilan subjek penelitian menggunakan sampling purposive dengan pengumpulan data menggunakan Skala Problematic Internet Use dan Skala Kesepian. Data dianalisis menggunakan korelasi product moment dengan program SPSS. Berdasarkan hasil analisis, diperoleh nilai korelasi (rxy) sebesar 0,721 dan p = 0,000 (p < 0,01). Hasil tersebut menunjukan bahwa terdapat hubungan positif antara kesepian dengan problematic internet use pada mahasiswa. Hasil tersebut menunjukkan bahwa hipotesis diterima, artinya semakin tinggi kesepian pada mahasiswa maka semakin tinggi pula problematic internet use pada mahasiswa dan sebaliknya, semakin rendah kesepian pada mahasiswa maka semakin rendah  pula problematic internet use pada mahasiswa. Koefisien determinasi (R2) =  0,52, hal ini menunjukkan bahwa kesepian memiliki kontribusi sebesar 52 % terhadap problematic internet use.
Validitas dan Reliabilitas Skala Student Engagement
Authors: Junianto Mahmud , Bashori Khoiruddin , Hidayah Nurul
Published: February 2021

Research on student engagement has been incrase in recent years. Therefore, to determine the high or low level of student engagement, a valid and reliable measuring instrument is required. This means that the measuring instrument of student engagement must measure only the construct of student engagement reliably and consistently in measurement. The purpose of this research was to test the validity and reliability of the student engagement construct based on Fredrick et al theory. The components of student engagement that are used as a reference for making measuring instruments consist of behavioral engagement, emotional engagement, and cognitive behavior. The study was conducted on 100 high school students using a proportional sampling technique. The measuring instrument is constructed using a semantic differential scaling model. The validity and reliability test used the confirmatory factor analysis (CFA) approach with the help of PLS 3.2.9 software. The results showed that the student attachment measurement tool was declared valid and reliable to be used as a measuring tool. The convergent and discriminant validity tests have met the standards, with loading factor score value of P> 0.5, while the Cronbach alpha reliability score is 0.753 and the composite reliability is 0.835. This measuring instrument is also declared fit with an RSMR value of 0.033. 7 items dropped out of the 18 items tested. Keywords :Student Engagement, Validity,Reliability, Measurement
The effect of Planned Behavior Theory on Corruption Intention Intracampus Organization
Authors: Dian Nur Ema Zaka
Published: February 2021

This study aim to determine the effect of Planned Behavior Theory and it’s components on the corruption intention of intracampus organization administrators. The research subject were 111 administrator at Padang State University. The research design used is quantitative associative type with purposive sampling technique. The research used a corruption intention scale and Theory of Planned Behavior scale. The result found that there was a significant positive effect between Theory of Planned Behavior (TPB) and the intention of corruption in intracampus organization administrators with R2= 0,454 or 45,4%  effective contribution. The TPB components that have the most influence on corruption intentions are in order of attitude towards behavior, subjective norm, and perceive behavior control. There were no differences in corruption intention, both in terms of gender and frequency of joining organizations. This research can be used to consider the procurement of anti-corruption education courses in universities and student organizations can add a measure of TPB and corruption intention for recruitment of new members.