bluuebunny/crossref_metadata_2025 huggingface dataset:
THE REASONS FOR DRYING OUT PINUS PALLASIANA AND PINUS BRUTIA VAR. PITYUSA IN THE CRIMEA IN 2020
Authors: Lsikov V. P. , Trikoz N. N.
Published: May 2021

В статье рассматриваются вопросы усыхания аборигенных видов сосен в природныхэкосистемах и искусственных насаждениях Крыма в 2020 г. Проведено дендрологическое и фитопатологическое обследование погибших деревьев, сделан анализ метеорологических показателей в периоды большого и малого роста корней. Причиной внезапной гибели сосен стали аномальные климатические условия осени 2019 и весны 2020 г., которые повлияли на рост корней. У хвойных деревьев при нормальных условиях наблюдается два периода большого роста корней - осенью и весной. В период осеннею (2019) роста корней дефицит осадков в Крыму составлял 40% от нормы, в период весеннего (2020) - 87% и продолжался на протяжении 60 дней. Деревья испытали катастрофический дефицит влаги в верхнем корнеобитаемом слое почвы, из-за чего рост боковых сосущих корней прекратился. Известно, что при влажности почвы ниже 10% рост корней у хвойных прекращается совсем и дерево погибает. Общее количество полностью усохших деревьев разных типах насаждений в среднем составляет 1-3%, количество деревьев с частичным отмиранием кроны составляет от 30 до 50%. Все отмершие деревья находились в неблагоприятных для роста условиях Выявленные на отмерших деревьях короеды и лубоеды являются вторичными вредителями и не могут быть причиной отмирания деревьев.
DYNAMICS OF ASCORЬIC ACID AND PHENOLIC COMPOUNDS CONTENT IN THE BUDS OF GENUS FICUS SOME SPECIES AND CULTIVARS ON THE SOUTHERN COAST OF THE CRIMEA
Authors: Grebennikova О. А.
Published: May 2021

The results of ascorbic acid and phenohc compounds accumulation dynamics in the buds of the genus Ficus species and cultivars with different degree offrost resistance, growing under the conditions of the Southem Coast of the Crimea, аге presented. It was found that the frost resistance of the genus Ficus studied genotypes depends on the degree of flavonols and ascorbic acid accumulation and does not depend оп the total concentration of phenohc compounds. The participation of ascorbic acid and phenohc substances in the implementation of defense mechanisms of the genus Ficus studied genotypes under low-temperature stress is assumed.
Impact of COVID-19 on Patients with Cancer Receiving Immune Checkpoint Inhibitors
Authors: Bui Ai-Tram N. , Tyan Kevin , Giobbie-Hurder Anita , Klein Isaac A. , Manos Michael P. , Zubiri Leyre , Reynolds Kerry , Grover Shilpa , Weinhouse Gerald L. , Ott Patrick A. , LeBoeuf Nicole R. , Rahma Osama
Published: May 2021

Introduction

To evaluate the impact of Sars-Cov-2 infection on mortality and immune checkpoint inhibitor (ICI) toxicity in patients with cancer receiving ICIs compared to those not receiving ICIs.

Methods

We conducted a retrospective matched cohort study of 25 patients receiving ICIs within 1 year of coronavirus disease 2019 (COVID-19) diagnosis between March 20, 2020, and June 3, 2020, at the Dana-Farber Cancer Institute/Mass General Brigham. Cases were matched 1:1 with controls based on age, sex, and anticancer therapy within the prior 6 months.

Results

Seven of 25 (28%) patients receiving ICIs died from COVID-19 as compared with nine of 25 (36%) controls. Through multivariable analysis adjusting for age, sex, and anticancer therapy, ICI use was not associated with increased risk for COVID-19 death (OR [odds ratio] 0.36, 95% CI 0.07–1.87). Determinants of mortality included age (OR 1.14, 95% CI 1.03–1.27) and chronic obstructive pulmonary disease (OR 12.26, 95% CI 1.76–85.14). Statin use was protective against mortality (OR 0.08, 95% CI 0.01–0.63). Two patients experienced persistent immune-related adverse events (irAEs) (hypophysitis); one had new-onset irAE (hypothyroidism) during their COVID-19 course. Patients with ICIs had significantly higher platelet (p = 0.017) and D-dimer (p = 0.037) levels. Elevated troponin levels (p = 0.01) were associated with COVID-19 death in patients using ICI.

Conclusion

There is insufficient evidence to conclude COVID-19–related outcomes are associated with ICIs, and we did not observe an increased risk of COVID-19–related death associated with ICIs. The potential protective effect of statin therapy and role of laboratory biomarkers warrant further investigation.
Implementation of a Novel Web-Based Lesion Selection Tool to Improve Acquisition of Tumor Biopsy Specimens
Authors: Xu Mingxuan , Tapia Coya , Hajjar Joud , Sabir Sharjeel , Colen Rivka , Nagarajan Priyadharsini , Aung Phyu P. , Gong Jing , Rodon Jordi , Fu Siqing , Stephen Bettzy , Roy-Chowdhuri Sinchita , Le Hung , Yang Vincent , Zarifa Abdulrazzak , Abdelsalam Mohamed Elsayed , Jhingran Anuja , Javle Milind , Pant Shubham , Carter Brett , Milton Denai R. , Sun Ryan , Karp Daniel D. , Koay Eugene Jon , Yang Yali , Wistuba Ignacio I. , Hwu Patrick , Meric-Bernstam Funda , Naing Aung
Published: May 2021

Introduction

For maximum utility of molecular characterization by next-generation sequencing (NGS) and better understanding of tumor microenvironment with immune correlates analysis, biopsy specimens must yield adequate tumor tissue, and sequential biopsy specimens should sample a consistent site. We developed a web-based lesion selection tool (LST) that enables management and tracking of the biopsy specimen collections.

Methods

Of 145 patients, the LST was used for 88 patients; the other 57 served as controls. We evaluated consistency of the lesion biopsied in longitudinal collections, number of cores obtained, and cores with adequate tumor cellularity for NGS. The Fisher exact test and Wilcoxon rank sum test were used to identify differences between the groups.

Results

The analysis included 30 of 88 (34%) patients in the LST group and 52 of 57 (91%) in the control group. The LST workflow ensured 100% consistency in the lesions biopsied compared with 75% in the control group in longitudinal collections and increased the proportion of patients in whom at least five cores were collected per biopsy.

Conclusions

The novel LST platform facilitates coordination, performance, and management of longitudinal biopsy specimens. Use of the LST enables sampling of the designated lesion consistently, which is likely to accurately inform us the effect of the treatment on tumor microenvironment and evolution of resistant pathways. Such studies are important translational component of any clinical trials and research as they guide the development of next line of therapy, which has significant effect on clinical utility. However, validation of this approach in a larger study is warranted.
Histórico e perspectiva da situação sanitária da febre aftosa no Estado de São Paulo
Authors: Costa Hugo Leonardo Riani , Debiazzi Adriano Macedo , Guido Maria Carolina , Lagatta Luciano
Published: May 2021

A febre aftosa é uma doença infecciosa aguda, causada por vírus do gênero Aphthovirus, da família Picornaviridae. Apresenta grande impacto sobre a sanidade dos animais e, em função da elevada capacidade de difusão, é considerada a doença com maior interferência no comércio internacional de carnes. Em virtude de suas consequências diretas e indiretas, o combate à febre aftosa é uma das maiores preocupações de todos os envolvidos com a pecuária nacional, desde o início do século passado. Em decorrência dos grandes esforços realizados, o Brasil passou a ser reconhecido como país livre de febre aftosa e, atualmente, busca galgar um novo patamar, com a suspensão da vacinação em todo seu território. A participação dos médicos-veterinários foi fundamental neste processo e continuará sendo essencial nos desafios futuros.
Truck Platooning on Flexible Pavements in Illinois
Authors:   University of Illinois at Urbana-Champaign, Al-Qadi Imad , Okte Egemen ,   University of Illinois at Urbana-Champaign, Ramakrishnan Aravind ,   University of Illinois at Urbana-Champaign, Zhou Qingwen ,   University of Illinois at Urbana-Champaign, Sayeh Watheq ,   University of Illinois at Urbana-Champaign
Published: May 2021

Truck platoons have many benefits over traditional truck mobility. Truck platoons have the potential to improve safety and reduce fuel consumption between 5% and 15%, based on platoon configuration. In Illinois, trucks carry more than 50% of freight tonnage and constitute 25% of the traffic on interstates. Therefore, expected fuel savings would be significant for trucks. Deployment of truck platoons within interstate highways may have a direct effect on flexible pavement performance, as the time between consecutive axle loads (i.e., resting time) is expected to decrease significantly. Moreover, platoons could potentially accelerate pavement damage accumulation due to trucks’ channelized position, decreasing pavement service life and increasing maintenance and rehabilitation costs. The main objective of this project was to quantify the effects of truck platoons on pavements and to provide guidelines to control corresponding potential pavement damage. Finite-element models were utilized to quantify the impact of rest period on pavement damage. Recovered and accumulated strains were predicted by fitting exponential functions to the calculated strain profiles. The results suggested that strain accumulation was negligible at a truck spacing greater that 10 ft. A new methodology to control pavement damage due to truck platoons was introduced. The method optimizes trucks’ lateral positions on the pavements, and an increase in pavement service life could be achieved if all platoons follow this optimization method. Life cycle assessment and life cycle cost analysis were conducted for fully autonomous, human-driven, and mixed-traffic regimes. For example, for an analysis period of 45 years, channelized truck platoons could save life cycle costs and environmental impacts by 28% and 21% compared with human-driven trucks, respectively. Furthermore, optimum truck platoon configuration could reduce life cycle costs and environmental impacts by 48% and 36%, respectively, compared with human-driven trucks. In contrast, channelized traffic could increase pavement roughness, increasing fuel consumption by 15%, even though platooning vehicles still benefit from reduction in air drag forces. Given that truck platoons are expected to be connected only in the first phase, no actions are required by the agency. However, in the second phase when truck platoons are also expected to be autonomous, a protocol for driving trends should be established per the recommendation of this study.
Moçambique e “uma guerra que parece não ter fim” em Terra Sonâmbula
Authors: Alves Lamas Isabella , Bueno Natália
Published: May 2021

Em 4 de outubro de 1992, foi assinado o Acordo Geral de Paz (AGP) que pôs fim ao conflito armado que assolou Moçambique por dezesseis anos. Apesar de este dia ser celebrado como o dia da Paz e da Reconciliação e oficialmente marcar o fim da guerra entre a Frelimo e a Renamo (1976-1992), este também pode ser visto, de uma forma mais ampla, como o fim de uma era de violência direta e de conflito armado que começou com a Luta de Libertação Nacional (1964-1974) contra o colonialismo português. Em seu romance Terra Sonâmbula, Mia Couto entrelaça duas histórias diferentes, misturando o presente e o passado, com o intuito de denunciar a destruição causada por “uma guerra que parece não ter fim”. Argumentamos que essa ideia de continuidade da guerra em Moçambique se expressa em três dimensões: através das ligações entre a guerra colonial-libertação e a guerra civil, por meio das memórias daquelas pessoas que a vivenciaram de forma direta ou indireta, e da memória coletiva de forma mais geral e, por fim, através da permanência de relações de colonialidade na sociedade moçambicana contemporânea. Com base na obra de Mia Couto e recurso às gramáticas do Pós-colonialismo, dos Estudos para a Paz e dos Estudos da Memória, este artigo reflete sobre a continuidade da guerra no país e como esse passado ainda se faz tão presente através das narrativas de memórias acerca do mesmo.
Mundo em desencanto em tempos de guerra civil
Authors: Moraes Claudia Letícia
Published: May 2021

A presente investigação visa empreender uma leitura do romance Antes de Nascer o Mundo (2009), do moçambicano Mia Couto, considerando alguns eixos norteadores das representações feitas pelo autor. Assim, por se tratar de uma narrativa que está centrada na vida de personagens que estão escondidos no interior da savana africana a fim de fugir das agruras da guerra, a análise que ora propomos pretende considerar de que maneira a narrativa intenta elaborar e superar determinados traumas causados pela guerra civil moçambicana do pós-independência. Para tanto, serão utilizados como escopo teórico autores como Nazir Can (2020), Elena Brugioni (2019, 2012) e Jane Tutikian (2006) para compreender os mecanismos utilizados pelo autor na intenção de retratar traumas de guerra, esfacelamentos familiares e a própria linguagem elaborada por Couto na representação de uma Moçambique tomada de assalto por conflitos internos.
PERBEDAAN PENGETAHUAN PRE DAN POST PENYULUHAN KESEHATAN TENTANG KANKER SERVIKS PADA WANITA DI DUSUN RINGINSARI BOKOHARJO PRAMBANAN SLEMAN DAERAH ISTIMEWA YOGYAKARTA
Authors: Nita Vio , Astuti Tutik
Published: May 2021

Pendahuluan : Kanker serviks merupakan kanker kedua di dunia yang paling banyak dideritawanita setelah kanker payudara terutama di Negara Berkembang seperti Indonesia. Faktor yangmembuat telambatnya deteksi dini yang dilakukan oleh wanita karena kurangnya pengetahuantentang kanker serviks, misalnya untuk menjaga kebersihan daerah kewanitaan (vagina)sangatlah penting dilakukan khususnya untuk wanita dan bagaimana cara mendeteksi dini agarwanita tidak terkena kanker serviks.Tujuan : Untuk mengetahui perbedaan pengetahuan Pre dan Post Penyuluhan KesehatanTentang Kanker Serviks Pada Wanita Di Dusun Ringinsari Bokoharjo Prambanan SlemanDaerah Istimewa YogyakartaMetode : Metode yang digunakan yaitu quasi eksperiment dengan pendekatan “One GroupsPretest-Posttest Design”. Jumlah sampel yaitu 35 orang. Pengambilan sampel pada penelitian iniyaitu menggunakan teknik sampling Accidental Sampling.Hasil : Sebagian besar (45,71%) pre test pengetahuan kanker serviks dan deteksi dini dalamkategori kurang dan setelah diberi penyuluhan sebagian besar (71,43%) dalam kategori baik.Diketahui p_value 0,000 < 0,05.Kesimpulan : Ada perbedaan antara pengetahuan tentang kanker serviks sebelum diberipenyuluhan dan setelah diberi penyuluhan.
ORIENTALISM IN THE AMERICAN AND BRITISH MEDIA EDITORIALS: ORIENTALIZING ISLAM AND ISLAMISTS IN THE COVERAGE OF THE EGYPTIAN REVOLUTION AND ITS AFTERMATH (2011-2018)
Authors: Ayyad ECHINE
Published: May 2021

The Arab revolutions of 2011 and their aftermath produce a myriad of political contexts that triggered much coverage in the Western media. This study draws on Edward Said’s postcolonial critical model of Orientalism (1978) to locate Orientalist tropes in Western media editorials that cover the revolution and its aftermath in Egypt (2011-2018). It discusses the ideological manipulative functions of the media to see if they are utilized to provide a coverage that emanates from the classical Orientalist frames when reporting about the revolution’s participants –Muslims/Islamists. Using critical discourse analysis, this thesis examines the editorial narratives (n=101) of four highly read US and British newspapers: The New York Times, The Washington Post, The Telegraph and The Guardian. The thesis outlines evidence that suggests that the selected media’s representation of the revolution’s participants is imbued with the ideology of Orientalism: Islam, political Islam, and the Muslim Brotherhood are reported through stereotypical lenses that posits them as an antithesis of the modern Western society and its values.
The “virtual OR:” creation of a surgical video-based gynaecologic surgery teaching session to improve medical student orientation and supplement surgical learning during COVID-19
Authors: Stairs Jocelyn , Amir Baharak , Vair Brett
Published: May 2021

Implication Statement

The COVID-19 pandemic resulted in changes to clinical clerkship delivery including decreased surgical exposure. The Department of Obstetrics and Gynaecology at Dalhousie University developed a novel, resident-led learning experience using a curated presentation of operative footage. This session aimed to improve medical students’ orientation to the operative environment and supplement teaching on pelvic anatomy and gynaecologic surgery in response to decreased exposure during the COVID-19 pandemic. Medical students perceived this session as valuable and felt it improved their preparedness for the operating room. This initiative has the potential to improve medical student orientation to the operative environment.
Assessment of coxarthritis risk with dimensionless biomechanical parameters
Authors: Uršič Bojana , Kocjančič Boštjan , Romolo Anna , Iglič Aleš , Kralj-Iglič Veronika , Zupanc Oskar
Published: May 2021

Purpose: Unfavourable distribution of contact stress over the load bearing area is considered a risk factor for early coxarthritis and it is of interest to outline respective biomechanical parameters for its prediction. The purpose of the work was to develop a transparent mathematical model which can be used to assess contact stress in the hip from imaged structures of pelvis and proximal femora, in large population studies and in clinical practice. Methods: We upgraded a previously validated three-dimensional mathematical model of the human hip in the one-legged stance HIPSTRESS by introducing parameters independent from the size of the structures in the images. We validated a new parameter – dimensionless peak stress normalized by the body weight and by the radius of the femoral head (pmaxr2/WB) on the population of 172 hips that were in the childhood subjected to the Perthes disease and exhibited increased proportion of dysplastic hips. Results: The dimensionless parameter pmaxr2/WB exhibited smaller number of indecisive cases of hip dysplasia predicted by the model than the previously used parameter pmax/WB (6% vs. 81%, respectively). A threshold for an increased risk of early coxarthritis development by the HIPSTRESS parameter H = pmaxr2/WB was found to be 2. Conclusions: We proposed a dimensionless peak stress on the load bearing area with the border value of 2 as a decisive parameter over which hips are at risk for early development of degenerative processes and presented a method for determination of biomechanical parameters with the use of nomogram.
Evaluation of brain injury criteria based on reliability analysis
Authors: Hazay Máté , Bojtár Imre
Published: May 2021

Purpose: Among the proposed brain injury metrics, Brain Injury Criteria (BrIC) is a promising tool for performing safety assessment of vehicles in the future. In this paper, the available risk curves of BrIC were re-evaluated with the use of reliability analysis and new risk curves were constructed for different injury types based on literature data of tissue-level tolerances. Moreover, the comparison of different injury metrics and their corresponding risk curves were performed. Methods: Tissue-level uncertainties of the effect and resistance were considered by random variables. The variability of the tissue-level predictors was quantified by the finite element reconstruction of 100 frontal crash tests which were performed in Simulated Injury Monitor environment. The applied tests were scaled to given BrIC magnitudes and the injury probabilities were calculated by Monte Carlo simulations. New risk curves were fitted to the observed results using Weibull and Lognormal distribution functions. Results: The available risk curves of diffuse axonal injury (DAI) could be slightly improved, and combined AIS 4+ risk curves were obtained by considering subdural hematoma and contusion as well. The performance of several injury metrics and their risk curves were evaluated based on the observed correlations with the tissue-level predictors. Conclusions: The cumulative strain damage measure and the BrIC provide the highest correlation (R2 = 0.61) and the most reliable risk curve for the evaluation of DAI. Although the observed correlation is smaller for other injury types, the BrIC and the associated reliability analysis-based risk curves seem to provide the best available method for estimating the brain injury risk for frontal crash tests.
Gender differences of the improvement in balance control based on the real-time visual feedback system with smart wearable devices
Authors: I-Lin Wang  , Li-I Wang  , Shi-Jie Xue  , Rui Hu  , Rong-Jiun Jian  , Chun-Sheng Ho
Published: May 2021

Purpose: The body maintains stability by integrating inputs from the central nervous system of vision, hearing, proprioception, and multiple senses. With the development of smart wearable devices, smart wearable devices can provide real-time center of pressure position-assisted balance control, which is beneficial to maintain physical balance. Methods: Forty healthy college students (20 male, 20 female) participated in this study, and the posture balance actions of left-leg stance non-visual feedback, left-leg stance visual feedback, right-leg stance non-visual feedback, and right-leg stance visual feedback were performed. Visual feedback provided smart insoles matching Podoon APP on a tablet computer with the COP position displayed by a dot as real-time visual feedback. Results: The experimental results show that the displacement, velocity, radius, and area of the COP decreased significantly in the left-leg stance visual feedback/right-leg stance visual feedback, the test compared the parameters in the left-leg stance non-visual feedback/right-leg stance nonvisual feedback (P < 0.05). Providing visual feedback through intelligent insoles can reduce the movement of the center of mass and maintain physical stability for healthy young people of different genders. In the one leg visual/non-visual in standing, the COP maximum anteroposterior displacement, COP anteroposterior velocity, COP radius, and COP area in women are significantly smaller than in men (P < 0.05). Women have better real-time balance control ability than men with smart insoles. Conclusions: The simple intelligent wearable assisted devices can immediately increase the control ability in static stance of men and women, and women have better real-time balance control ability than men.
Continuous dependence on a parameter of the countable fractal interpolation function
Authors: Secelean Nicolae-Adrian
Published: May 2021

In this paper we will show that, if a countable interpolation data depends continuously on a parameter and some proper continuity conditions are fulfilled, then its associated attractor and the corresponding countable fractal interpolation function depends also continuously on the respective parameter. An example in R^2 is given.
n-th relative nilpotency degree and relative n-isoclinism classes
Authors:   DEPARTMENT OF MATHEMATICS MALAYER UNIVERSITY FACULTY OF MATHEMATICAL SCIENCES POST BOX: 657719–95863, MALAYER, IRAN E-mail address: ras rezaei@yahoo.com, REZAEI RASHID , RUSSO FRANCESCO G. ,   DEPARTMENT OF MATHEMATICS UNIVERSITY OF PALERMO ARCHIRAFI 34, 90123 PALERMO, ITALY E-mail address: francescog.russo@yahoo.com
Published: May 2021

P. Hall introduced the notion of isoclinism between two groups more than 60 years ago. Successively, many authors have extended such a notion in different contexts. The present paper deals with the notion of relative n-isoclinism, given by N. S. Hekster in 1986, and with the notion of n-th relative nilpotency degree, recently introduced in literature.
Analytical investigation of beam deformation equation using perturbation, homotopy perturbation, variational iteration and optimal homotopy asymptotic methods
Authors:   DEPARTMENT OF CIVIL ENGINEERING BABOL UNIVERSITY OF TECHNOLOGY, BABOL, IRAN, FARROKHZAD F. , MOWLAEE P. ,   DEPARTMENT OF ELECTRICAL ENGINEERING AMIRKABIR UNIVERSITY, HAFEZ, TEHRAN, IRAN, BARARI A. ,   DEPARTMENT OF CIVIL ENGINEERING AALBORG UNIVERSITY SOHNGRDSHOLMSVEJ 57, 9000 AALBORG, DENMARK E-mail address: ab@civil.aau.dk, amin78404@yahoo.com, CHOOBBASTI A. J. ,   DEPARTMENT OF CIVIL ENGINEERING BABOL UNIVERSITY OF TECHNOLOGY, BABOL, IRAN, KALIJI H. D. ,   DEPARTMENT OF MECHANICAL ENGINEERING ISLAMIC AZAD UNIVERSITY, SEMNAN BRANCH, SEMNAN, IRAN
Published: May 2021

The beam deformation equation has very wide applications in structural engineering. As a differential equation, it has its own problem concerning existence, uniqueness and methods of solutions. Often, original forms of governing differential equations used in engineering problems are simplified, and this process produces noise in the obtained answers. This paper deals with solution of second order of differential equation governing beam deformation using four analytical approximate methods, namely the Homotopy Perturbation Method (HPM), Variational Iteration Method (VIM) and Optimal Homotopy Asymptotic Method (OHAM). The comparisons of the results reveal that these methods are very effective, convenient and quite accurate to systems of non-linear differential equation.
Applications to discrete Morse theory: The collapsibility of CAT(0) cubical complexes of dimension 2 and 3
Authors:   BABES-BOLYAI UNIVERSITY DEPARTMENT OF GEOMETRY M. KOGALNICEANU 1 400084 CLUJ-NAPOCA, ROMANIA E-mail address: lioana@math.ubbcluj.ro, LAZAR IOANA-CLAUDIA
Published: May 2021

We investigate, using discrete Morse theory, the collapsibility of finite cubical complexes of dimension 2 and 3. Our main result states that any finite cubical complex of dimension 3 or less endowed with the standard piecewise Euclidean metric that is non-positively curved, and that satisfies the property that every 2-cell is the face of at most two 3-cells in the complex, collapses to a point.
Sharp form of inequality for the constant e
Authors:   HENAN POLYTECHNIC UNIVERSITY SCHOOL OF MATHEMATICS AND INFORMATICS JIAOZUO CITY 454003, HENAN PROVINCE, CHINA E-mail address: chenchaoping@sohu.com, CHEN CHAO-PING , MORTICI CRISTINEL ,   VALAHIA UNIVERSITY OF TARGOVISTE DEPARTMENT OF MATHEMATICS UNIRII 18, 130082 TARGOVISTE, ROMANIA E-mail address: cmortici@valahia.ro
Published: May 2021

(i) We determine the best possible constants α and β such that the inequalities ... are valid for all integers n ≥ 1...We determine the values a, b which provide the fastest sequence (vn)n≥1 approximating the constant e. (ii) Let the sequence vn be defined by
Computing Zagreb, Hyper-Wiener and Degree-Distance indices of four new sums of graphs
Authors:   UNIVERSITY OF KASHAN DEPARTMENT OF MATHEMATICS, STATISTICS AND COMPUTER SCIENCE KASHAN 87317-51167, I R IRAN E-mail address: ashrafi@kashanu.ac.ir, ASHRAFI A. R. , HAMZEH A. ,   UNIVERSITY OF KASHAN DEPARTMENT OF MATHEMATICS, STATISTICS AND COMPUTER SCIENCE KASHAN 87317-51167, I R IRAN, HOSSEIN-ZADEH S. ,   UNIVERSITY OF KASHAN DEPARTMENT OF MATHEMATICS, STATISTICS AND COMPUTER SCIENCE KASHAN 87317-51167, I R IRAN
Published: May 2021

Eliasi and Taeri [M. Eliasi and B. Taeri, Four new sums of graphs and their Wiener indices, Discrete Appl. Math., 157 (2009), 794-803] presented four new sums and computed their Wiener index. In this paper, we continue this work to compute the Zagreb, Hyper-Wiener and Degree-Distance Indices of these graph operations. Some applications are also presented.
Investigating the Generalization Ability of Parameterized Quantum Circuits with Hierarchical Structures
Authors: Ran Runheng , Situ Haozhen
Published: May 2021

Quantum computing provides prospects for improving machine learning, which are mainly achieved through two aspects, one is to accelerate the calculation, and the other is to improve the performance of the model. As an important feature of machine learning models, generalization ability characterizes models' ability to predict unknown data. Aiming at the question of whether the quantum machine learning model provides reliable generalization ability, quantum circuits with hierarchical structures are explored to classify classical data as well as quantum state data. We also compare three different derivative-free optimization methods, i.e., Covariance Matrix Adaptation Evolution Strategy (CMA-ES), Constrained Optimization by Linear Approximation (COBYLA) and Powell. Numerical results show that these quantum circuits have good performance in terms of trainability and generalization ability.
A NEW CLASS OF TRANSMUTED MODIFIED WEIGHTED WEIBULL DISTRIBUTION AND ITS PROPERTIES
Authors: Badmus N.I. , Adeleke K.A. , Olufolabo A.A.
Published: May 2021

An additional parameter was added to Modified Weighted Weibull distribution with method of quadratic rank transmutation which led to a newly developed distribution called Transmuted Modified Weighted Weibull distribution. Two distributions that emanated from the new distribution are Transmuted Modified Rayleigh and Transmuted Modified Exponential distributions. Some properties of the distribution that were obtained include; the survival rate, hazard rate, reverse hazard rate function; and moment generating function, mean and variance. Also, parameters of the model were estimated using maximum likelihood estimation method. The model was applied to a life time data set of total milk production of the first birth of 107 cows which showed a better performance compared to some existing known distributions.
Perfil de consumo y costo de bebidas habituales y recomendadas en México, 2012-2018
Authors: Mendoza-Velazquez Alfonso , Pérez-Gómez Ana Elena
Published: May 2021

El objetivo de este estudio fue medir y comparar el comportamiento inflacionario del costo de las Bebidas Habituales y del costo de la Jarra de Bebidas Recomendada para la población mexicana. Basados en información sobre el consumo de bebidas en adultos (Encuesta Nacional de Salud y Nutrición) y de los precios promedio mensuales (Instituto Nacional de Estadística y Geografía) para cada bebida durante enero 2012 - Junio 2017, se calcularon los costos del consumo y la inflación de bebidas habitual y recomendado. El costo de las Bebidas Recomendadas es consistentemente mayor que el de las Bebidas Habituales. Las tasas de inflación son similares excepto en 2014 cuando se introdujo el impuesto a las bebidas azucaradas. Se encuentra que los precios y la inflación de las bebidas con azucares añadidos y de las bebidas habituales responden menos que proporcionalmente. Una inflación del costo de las bebidas recomendadas más alta que las habituales puede incrementar la demanda por bebidas habituales. El comportamiento de la inflación revela que el impuesto a bebidas azucaradas puede ser efectivo pero transitorio.
The aim of this study was to measure and compare the inflationary behavior of the Usual Drinks Intake cost and the Recommended Drinks Intake Jar cost for the Mexican population. Based on information about the consumption of drinks in adults (National Health and Nutrition Survey) and of the average monthly prices (National Institute for Statistic and Geography) for each specific drink during January 2012-June 2017, we calculate consumption costs and inflation of usual and recommended drink intakes. The cost of the recommended drinks is consistently higher than the usual drinks cost. Inflation rates are similar in both drink intakes except in 2014, when the tax to sugary drinks was implemented. Prices and inflation of sugary drinks and usual drinks respond less than proportionally. A higher inflation of recommended drink costs compared to the usual drinks inflation could increase the demand for usual drinks. The behavior of inflation reveals that the tax to sugary drinks can be effective, but transitory.
Caracterización del consumo de alimentos e ingesta de nutrientes de población residente en las Islas Galápagos
Authors: Neira-Mosquera Juan Alejandro , Sánchez-Llaguno Sungey Naynee , Villena-Esponera María Pilar , Moreno-Ortega Alicia , Moreno-Rojas Rafael
Published: May 2021

Las Islas Galápagos es una de las provincias de Ecuador con mayores índices de sobrepeso y obesidad en población adulta. Debido a las restricciones de producción de alimentos, la presión turística y otros factores sociales; la disponibilidad, el acceso y consumo de alimentos saludables y recomendables puede estar afectando al estado de seguridad alimentaria y nutricional de su población. Por ello, el objetivo de este estudio es analizar el consumo de alimentos de la población y su adecuación a las necesidades nutricionales. Sobre una muestra de 120 personas residentes en las Islas Galápagos se aplicaron 3 R24h. Los resultados de la valoración nutricional fueron comparados con las IDR, realizando un análisis factorial multivariante para analizar diferencias por grupo de edad o desempeño profesional. Se realizó un análisis de componentes principales para caracterizar el perfil de ingesta de nutrientes. Para energía y principios inmediatos se sobrepasan las recomendaciones, principalmente entre las mujeres, a la vez que se evidencia una ingesta inadecuada de fibra, iodo, ácido fólico y vitamina E. Respecto a los grupos de alimentos, el consumo medio de frutas y verduras frescas es muy escaso y el aporte proteico proviene en mayor medida de productos cárnicos (46%), seguido de pescado (24%) y arroz (17%). Los resultados de este estudio evidencian la necesidad de asegurar el acceso a alimentos frescos y saludables, en especial frutas y verduras, y promover la adopción de pautas nutricionales que promuevan un consumo adecuado de ciertos alimentos.
Preferencia y grado de satisfacción de productos panaderos con una mezcla cereal-leguminosa en adultos de Chile
Authors: Fonseca-Bustos Verónica , Márque Constanza , Ulloa Natalia , Ruíz López Mario Alberto , Valdés Miramontes Elia Herminia
Published: May 2021

El presente trabajo tuvo como objetivo determinar la preferencia y el grado de satisfacción de cuatro productos de panadería (galletas y grissinis) elaborados a base de una mezcla de trigo y frijol común (Phaseolus vulgaris) o trigo y lupino (Lupinus albus) en adultos de Chile, y comparar los resultados obtenidos para estos productos en población mexicana. El análisis sensorial se realizó mediante dos pruebas sensoriales hedónicas, una de preferencia y otra de grado de satisfacción. Los participantes fueron 60 adultos de Concepción, Chile. Los resultados mostraron que los cuatro productos fueron del agrado de los participantes, siendo las versiones elaboradas a base de harina de trigo y lupino las más preferidas y mayor puntuadas (2,05 ± 1,05 galleta y 1,28 ± 1,22 grissini) respecto a las elaboradas a base de harina de trigo y frijol (1,90 ± 1,22 galleta y 1,28 ± 1,22 grissini). Al comparar los valores obtenidos de los cuatro productos, se encontró diferencia estadística significativa en los puntajes otorgados a las galletas. En los grissinis los puntajes otorgados fueron idénticos. Los resultados de los participantes mexicanos mostraron una mayor preferencia y grado de satisfacción para los productos elaborados a base de harina de trigo y frijol. De acuerdo a los resultados se puede concluir que los productos de panadería elaborados con mezclas de cereales y leguminosas son una opción mediante la cual se puede favorecer el consumo de leguminosas, el cual ha disminuido en los últimos años.
Evaluación del contenido nutricional de productos lácteos en programa de alimentación venezolano
Authors: Hernandez Pablo , Marcano Patricia , Deniz Roberto
Published: May 2021

En Venezuela se distribuyen productos lácteos en polvo a través de los Comité Locales de Abastecimiento y Producción (CLAP). Con el objetivo de evaluar la composición nutricional de catorce marcas de productos lácteos provenientes de industrias mexicanas y distribuidos en Venezuela, se realizó un estudio descriptivo y transversal, con muestreo a conveniencia de 14 marcas de lácteos obtenidas en hogares beneficiados del área metropolitana de Caracas-Venezuela. Se cotejó la información presentada en el rotulado del producto y se efectuó un análisis químico de la composición nutricional. Los valores obtenidos se compararon utilizando como referencia a la norma COVENIN. En el etiquetado se encontró que sólo 2 marcas se denominan producto lácteo y el 43% de las marcas expresan el mismo contenido nutricional en el rótulo. En la analítica química se encontró inexactitud con la información presentada en el etiquetado nutricional. El análisis de componentes principales seguido de un conglomerado jerárquico permitió diferenciar 4 clúster o grupos: 2 reales y 2 ideales. La mayoría de los productos analizados son significativamente más altos en carbohidratos y sodio (p<0,05), además de bajos en proteínas y calcio (p<0,05). En conclusión, todas las muestras evaluadas incumplen la normativa correspondiente, al presentar irregularidades en la denominación del producto e informar valores que no se corresponden con el contenido nutricional resultante de los análisis químicos.
Consumo de Stevia según nivel socioeconómico y sexo en universitarios chilenos
Authors: Guerrero Marion , Angarita Dávila Lisse , Vásquez Leiva Alejandra , Morales Illanes Gladys , Schifferli Castro Ingrid , Sanhueza Espinoza Claudia , Encina Vega Claudia , Vivanco Cuevas Karla , Mena Bolvaran Francisco , Durán Agüero Samuel
Published: May 2021

La Stevia es un edulcorante no calórico de origen natural. En Chile, se ha convertido en uno de los edulcorantes más populares y de mayor consumo. El objetivo del estudio fue comparar la ingesta de Stevia según nivel socioeconómico (NSE) y sexo en una muestra de 473 estudiantes universitarios chilenos durante el periodo abril-junio 2014; 67% de sexo femenino y edad promedio de 20,4 ± 2,5 años. El consumo de Stevia fue de 0,85 mg/kg/día, no superó la ingesta diaria admisible (IDA) y, el mayor consumo fue de 83,7% del IDA. Se encontró una mayor ingesta de Stevia en mujeres de NSE alto y medio-alto que se consumieron a través de la ingesta de alimentos y gotas (p<0,05). Al comparar por sexo y NSE, las mujeres de NSE alto presentaron un mayor consumo (0,64 ± 1,4), en comparación con los hombres (0,26 ± 0,48) (p<0,05). Mientras que en los estratos bajos las diferencias entre mujeres y hombres fueron (0,42 ± 0,41) y (0,11 ± 0,42) respectivamente. El principal resultado de este estudio es que el consumo de Stevia es mayor en estudiantes universitarias de mayor nivel socioeconómico, específicamente alto y medio alto. Se esperaría un incremento en el consumo ENCs post incorporación de la nueva ley de etiquetado nutricional (Ley 20.606) del año 2016. Se sugieren nuevas investigaciones acerca del consumo de edulcorantes en grupos poblacionales de distintos estratos socioeconómicos.
Indicadores de transformación de alimentos consumidos en Chile para su uso en planificación de minutas
Authors: Lataste Claudia , Sandoval Sonia , Maturana Daniela , Delgado Carolina , Gajardo Sabrina , Cáceres Paola
Published: May 2021

Muchos de los alimentos consumidos a diario sufren previamente algún grado de transformación, desde mínimas operaciones de limpieza hasta cambios mayores producto de la cocción. Estas operaciones culinarias pueden afectar el volumen y/o peso de los alimentos, lo que implica una diferencia entre lo adquirido y lo realmente servido al plato. Algunos alimentos pierden gramaje mientras otros lo aumentan, dependiendo del alimento y del tipo y condiciones de la operación culinaria aplicada. Lo anterior influye en la planificación de minutas afectando el presupuesto y las raciones servidas. Para considerar estas variaciones se deben aplicar los indicadores de transformación de alimentos (ITA) que cuantifican las pérdidas por operaciones preliminares y los cambios generados por la cocción. El objetivo de este estudio fue obtener los ITA para distintos alimentos consumidos en Chile bajo diferentes operaciones culinarias. Para ello los alimentos fueron pesados, en bruto y neto, luego de lo cual se calcularon sus ITA correspondientes. Los indicadores obtenidos representan una estandarización nacional, no publicada previamente, cuya principal utilidad es la planificación de minutas, aunque también contribuyen a afinar el cálculo de la composición química de alimentos y preparaciones y al análisis de encuestas de consumo, lo que representa un aporte al área de alimentos y alimentación colectiva en Chile.
Many of the foods we eat suffer some grade of previous transformation, which can go from minimal cleaning operations to major transformations resulting from the application of heat. These actions produce a change in the volume and / or weight of the food, which implies a variation between the food that is acquired or bought and the food that is actually served and / or consumed. These variations could result in loss or gain in weight, depending on the type of food and the type and conditions of the culinary operation applied. On the other hand, these variations have implications in the planning of the menus since they can affect the budget and the quantities of the portion presented in the plate. In order to take these changes into account, the food transformation indices (ITA) must be applied, which consider losses due to preliminary operations and changes generated by cooking processes. The aim of this study was to obtain the different ITAs resulting from culinary operations carried out on food consumed in Chile. For this, the food was weighed, gross and net, calculating for each one the corresponding ITA. The indicators obtained represent a national standardization, not previously published, whose greatest usefulness is the planning of menus, although they are also useful in calculating the chemical composition of food and meals, and for intake survey analysis, being a contribution to the food area and the area of collective food in Chile.
Recomendaciones para los equipos que gestionan los comedores escolares en la emergencia sanitaria de COVID-19 en Argentina
Authors:   Grupo federal de trabajo para la elaboración de recomendaciones en comedores escolares en la pandemia de COVID-19 en Argentina, Moyano Daniela
Published: May 2021

El impacto de la pandemia causada por el COVID-19 puede profundizar las situaciones de malnutrición, donde será necesario adaptar los programas alimentarios a este nuevo contexto. El objetivo de este trabajo fue presentar la metodología y los principales resultados del proceso de formulación de una guía federal basada en la evidencia científica y adaptada a la realidad de la población infanto-juvenil que asiste a los comedores escolares de las 24 jurisdicciones de Argentina. Se observó que las modalidades de implementación de CE durante la pandemia fueron: módulos alimentarios (la más frecuente); módulos alimentarios entregados en la escuela con sostenimiento del CE regular y, viandas y/o refrigerios entregados diariamente. Existió escasa evidencia a nivel global y regional sobre recomendaciones específicas aplicadas a la implementación de CE, aunque se encontraron recomendaciones sobre higiene y manipulación de alimentos. A partir de un proceso participativo entre actores claves se obtuvieron recomendaciones específicas según las dimensiones de la seguridad alimentaria y nutricional (SAN). Se concluye que resulta necesario aumentar las experiencias participativas en el diseño de recomendaciones basadas en la evidencia, adaptadas al territorio y que asuman un enfoque integral desde las dimensiones de la SAN.
The Importance Of Relating Mathematical Problems With Other Subjects In The Formation Of Student’s Research Skills
Authors:   Master, Faculty Natural Sciences, Named After Nizami TSPU, Tashkent,Uzbekistan, Ikhtiyorjon Qizi Muqadasova Odina , Mirvali Qizi Shodmonkulova Shakhnoza ,   4th Year Student Majoring In Mathematics Teaching Methods, Named After Nizami TSPU, Tashkent, Uzbekistan, Xayrulla Qizi Xusanboyeva Zulfizar ,   4th Year Student Majoring In Mathematics Teaching Methods, Named After Nizami TSPU, Tashkent, Uzbekistan
Published: May 2021

In this article, you will learn about the importance of linking mathematics to other disciplines. Teaching science in conjunction with a variety of disciplines shapes and enhances a student’s ability to research. Any of the lessons using the questions and questions listed below will help students learn more. Because repetition strengthens knowledge. And solid knowledge is the foundation of the future. In this, the importance of mathematics is great. As the great scientist Lobachevsky said, "Mathematics is such a language - all exact sciences speak this language."
World Experience In The Organization And Functioning Of Financial And Industrial Groups
Authors:   Doctoral Student, Tashkent State Technical University, Tashkent, Uzbekistan, Abdullayeva Dilfuza Abubakirovna
Published: May 2021

The article considers the generalization of the international experience of FIGs and also substantiates the regularity of the merger of banking and industrial capital in modern conditions. It outlines the experience of the formation of financial in-industrial groups in Japan, Germany, France, USA, South Korea.
The Role Of Physical Exercises In The Development Of Consciousness
Authors:   Student Of Uzbek State University Of Physical Culture And Sport, Uzbekistan, Bakhshullaevich Dilmurodov Doston
Published: May 2021

This article deals with the importance of exercise in the development of consciousness. Here, in the examples, one can see the positive effects of exercise on human health, on performance and life. The article will be useful to all interested readers.
Factors For The Development Of Aesthetic Education In Modern Pedagogy
Authors:   Senior Lecturer Of The Department Of Music Education, Namangan State University, Uzbekistan, Akbarov Bakhtiyor , Abdulboqiyeva Mohicheha ,   Student Of The Faculty Of Music Education, Namangan State University, Uzbekistan
Published: May 2021

The music lesson is a leading scholar in the system of music education, because it covers sounds in a general way. Music lessons are different from other science lessons in that they are less artistically interesting and give children more creative pleasure, arousing emotional feelings and figurative experiences. Music, in particular, has a great positive effect on the mental and moral development of children.
Ethnic Factors And Attitudes Towards Human Capital Development
Authors:   Base Doctorate, Namangan State University, Uzbekistan, Makhamadaminovich Sodirjonov Mukhriddin
Published: May 2021

The main factor in the development of modern society is the scientific and innovative development of education, health, professional creativity and information technologies. The article analyzes the processes of ethnic originality in determining the place of a person and an ethnic group in the surrounding socio-cultural space, achieving human progress through a system of relations in the conditions of national relations.
The Continuation Task For Abstract Bicaloric Equation
Authors:   Assistant Of Professor, Namangan Engineering – Construction Institute, Uzbekistan, Egamberdiev O.M.
Published: May 2021

An ill-posed problem for an abstract bichaloric equation is studied and Tikhonov stability estimate is given.
The Stages Of Chronic Kidney Disease
Authors:   Samarkand State Medical Institute Assistant Of The Department Of Pediatric Dentistry, Samarkand City, Uzbekistan, Botirovna Saidmurodova Jamila , Tilavkulovich Obloqulov Axmad ,   Samarkand State Medical Institute Assistant Of The Department Of Pediatric Dentistry Samarkand City, Uzbekistan, Abdunosirovich Raximberdiyev Rustam ,   Samarkand State Medical Institute Head Of The Department Of Pediatric Dentistry, Samarkand City, Uzbekistan
Published: May 2021

This article discusses in detail the drugs used to prevent chronic kidney disease and the diseases that result from them. Chronic kidney disease is developing rapidly today, and short-term treatments are being found in medicine.