bluuebunny/crossref_metadata_2025 huggingface dataset:
Alice Munro Opens Wide the Gate for her Three Floras
Authors: Hesford Walter
Published: October 2020

Trois nouvelles d'Alice Munro présentent un personnage qui se prénomme Flora : “Boys and Girls,” “Friend of My Youth,” et “Runaway”. Écrites sur une période de près de quarante ans, elles révèlent les interactions entre les animaux et les humains, le pouvoir des mythes sexuels, la violence des hiérarchies patriarcales et les stratégies métafictionnelles de Munro qui ouvre toute grande la porte de l'interprétation.
Pride and Discretion
Authors: Lecercle Jean-Jacques
Published: October 2020

Cet essai fait une lecture de la nouvelle intitulée “Pride” d’Alice Munro comme emblème textuel à cinq composantes. (i) une composante sémantique (deux sens pour orgueil et deux pour discrétion) ; une composante narrative (la réécriture ironique d’Orgueil et Préjugé) ; (iii) l’ekphrasis d’un emblème (cinq jeunes mouffettes en train de jouer autour d’une vasque pour oiseaux) ; (iv) des animaux emblématiques (cinq mouffettes et un lièvre) ; (v) un programme lexical (phrases types : “running with the hare and hunting with the hounds”; “keeping oneself to oneself”). Enfin, cet essai dépasse la lecture emblématique pour mettre en lumière la distance ironique de l’auteur.
Du contexte à la situation au cotexte et à l’intertexte
Authors: Portine Henri
Published: October 2020

Les notions de contexte et de situation ont généralement évolué pour ne laisser la place qu’à contexte, d’où une certaine ambiguïté. De ce fait, la notion de contexte est souvent considérée comme approximative. L’auteur présente les conditions d’émergence de la notion de contexte et étudie les liens entre contexte, situation et cotexte à la lumière de théories qui apportent des éclairages particuliers. Puis, il propose ses propres distinctions et termine en mettant rapidement en parallèle contexte et intertexte.
Un « tas » de « narrats étranges » comme « simple veulerie schizophrène en face du réel » : la politique de l’esthétique volodinienne dans Des anges mineurs
Authors: Lesquelen Pierre
Published: October 2020

La fiction hermétique proposée par les « narrats », haillons textuels compilés par Antoine Volodine dans Des Anges mineurs, amène à interroger, en s’inspirant entre-autres des études philosophiques de Jacques Rancière, la politique de cette esthétique inassignable que forge l’écrivain « post-exotique. » La polyphonie fragile composée par le recueil, l’étrangeté des images convoquées et l’effilochage permanent du tissu narratif permettent une résistance de l’espace littéraire à l’agonie politique d’un collectif menacé d’extinction.
École et Citoyenneté au Gabon : le grand hiatus entre orientations officielles et contenus enseignés dans les salles de classe
Authors: Endamne Gilbert Nguema
Published: October 2020

La réflexion esquissée dans ce texte interroge l’éducation à la citoyenneté face aux actes d’incivilités constatés de façon récurrente au Gabon. La nature et la spécificité de cet enseignement montrent que celui-ci est source de problèmes. L’influence de la dimension internationale qui met l’accent sur la citoyenneté universelle, vient affaiblir le projet d’une éducation à la citoyenneté nationale en raison d’une tendance internationale qui bifffe les problèmes nationaux.
Cable Laying Using an ROV
Authors: Choi Jin-Kyu , Araki Eiichiro , Kawaguchi Katsuyoshi
Published: October 2020

AbstractA remotely operated vehicle (ROV) can install submarine cables along a planned route accurately, thereby deploying cabled seafloor observatories at the intended locations. In this study, we developed an ROV-based cable-laying system. Its manual and automated versions
have been successfully used for the installation of the Dense Oceanfloor Network system for Earthquakes and Tsunamis (DONET). The automated cable-laying system shows many advantages; for example, the cable-laying speed increased by approximately 0.1 knot from 0.5 knot, and the number of operators
was reduced by half. Thus, the physical and mental burdens on the shipboard members including ROV operators were relieved. In this paper, we share our experiences when laying cables using an ROV during DONET installation. First, the issues that should be addressed to complete a successful
cable-laying operation are discussed; subsequently, our manual and automated cable-laying systems are introduced. Then, the observations made during field operations for DONET installation are presented, which provide useful tips for developing an ROV-based cable-laying system.
Monitoring the Ocean Environment Using Robotic Systems: Advancements, Trends, and Challenges
Authors: Agarwala Nitin
Published: October 2020

AbstractScientists are able to gain a substantial understanding of various environmental processes (e.g., physical, chemical, or biological parameters) through environmental sensing and monitoring. Most of these monitoring scenarios involve large environmental space and require
a considerable amount of work and time for collecting the required data. Realizing the associated human effort, the data collection process was automated, to some extent, by providing wireless communication capabilities to the sensors. However, with the sensing environments increasing demographically,
the location of the sensors moved far apart, necessitating additional relay nodes. This made data collection time consuming and complex. In order to simplify the effort towards data collection by reducing the human involvement to a minimum and to reduce power requirement of the sensors for
data transmission, thereby increasing their life, use of marine robotic systems has been experimented with successfully. This article aims to discuss the advancements, trends, and challenges of marine robotic systems for environmental monitoring.
The Use of a UVC Lamp Incorporated With an ROV to Prevent Biofouling: A Proof-of-Concept Study
Authors: Braga Cierra , Hunsucker Kelli , Erdogan Caglar , Gardner Harrison , Swain Geoffrey
Published: October 2020

AbstractA proof-of-concept study was designed to investigate using an Ultraviolet C (UVC) lamp mounted on a hull-crawling remotely operated vehicle (ROV) to prevent biofouling on a ship hull. A wheeled cart with a UVC lamp was built to expose two large test panels to UVC.
The test panels were coated with an ablative copper antifouling and a silicone fouling release coating, and these were immersed in seawater at Port Canaveral, Florida. Three exposure frequencies (once a week, twice a week, and three times a week) and two dosages (8 and 16 s of UVC exposure)
were tested. UVC was effective at preventing biofilm growth during the first 2 weeks of UVC treatment but was unable to prevent increased fouling growth as time progressed. It appears that an increase in UVC intensity and duration of exposure would be needed to prevent fouling growth especially
during high-fouling seasons or that UVC exposure would need to be combined with another fouling prevention practice, such as mechanical wiping, to be more effective.
Dialysis access as a source of infective endocarditis in dialysis patients
Authors: Jeon Hee D. , Lo Kevin B. , Quintero Eduardo E. , Lee Byeori , Gulab Asma , Bhargav Ruchika , Pressman Gregg S.
Published: October 2020

The incidence of Infective Endocarditis (IE) is higher in dialysis patients compared to the general population. A major risk factor for IE in this group stems from bacterial invasion during repeated vascular access. Previous studies have shown increased risk of bacteremia in patients with indwelling dialysis catheters compared to permanent vascular access. However, association between the development of IE and the type of dialysis access is unclear. We aimed to examine the associated types of intravascular access and route of infection in dialysis patients who were admitted with infective endocarditis at our center. All patients admitted to Albert Einstein Medical Center in Philadelphia with a diagnosis of infective endocarditis who were on chronic hemodialysis were identified from the hospital database for the period of 1/1/07 to 12/31/18. Modified Duke criteria was used to confirm the diagnosis of infective endocarditis. A total of 96 cases were identified. Of those, 57 patients had an indwelling dialysis catheter while the other 39 had permanent dialysis access. In 82% of patients with dialysis catheters, their dialysis access site was identified as the primary source of infection compared to 30% in those with permanent dialysis access (p<0.001). The number of dialysis catheters placed in the preceding 6 months was strongly associated with endocarditis resulting from the dialysis access site (OR = 3.202, p=0.025). Dialysis catheters are more likely to serve as the source of infection in dialysis patients developing IE compared to permanent dialysis access. Increased awareness of risk of IE associated with dialysis catheters is warranted.
God’s spirit (of wisdom) has been sent into the world, not Covid-19: A contextual systematic-theological perspective
Authors: Veldsman Daniël P.
Published: October 2020

How are we to make theological sense of the Covid-19 pandemic? In response to the viewpoint of Wilhelm Jordaan as expressed in a popular newspaper that it is foolish to understand Covid-19 as God’s punishment or nature’s way for restoration, it is critically argued that Jordaan mostly helps us with what not to think, but not so much with what to think of the current situation from a Christian theological perspective. The theological perspective that is presented in response to Jordaan takes as the vantage point a different interpretative line of an image of God (as ‘regretting/sorrow God’) over against more popular and established lines of God images such as God the Almighty. It is argued that the different God image of a ‘silent God’ and the need for wisdom that is prompted by the image challenges us here and now with an invitation to take (self)responsibility for the Covid-19-pandemic before a silent (distanced) God.Contribution: This article represents original systematic-theological reflection on the doctrine of God and anthropology within contemporary theology-science discourses. It focuses on a Christian biblical neglected God image of a ‘regretting/sorrow God’ (Genesis) in relation to embodied personhood within the current Covid-19 pandemic. It proposes a newly formulated understanding of a ‘silent God’ on the one hand and human self-responsibility and the seeking of wisdom on the other hand.
Differential herbivore occupancy of fire-manipulated savannas in the Satara region of the Kruger National Park, South Africa
Authors: Dlamini Thobile B. , Reilly Brian K. , Thompson Dave I. , Burkepile Deron E. , Botha Judith M. , Rebelo Anthony G.
Published: October 2020

The Kruger National Park’s (KNP) long-running experimental burn plots (EBPs) have a history of research projects, which improve the understanding of fire in savanna ecosystems. Using data from KNP’s aerial censuses (2005–2016) and in situ dung count data (2008–2017), this study assessed (1) herbivore densities on the Satara, N’Wanetsi and Marheya EBPs, on annual, triennial and no-burn treatments and across pre-, during and post-drought climate conditions; (2) herbivore densities of these EBPs relative to their non-manipulated surroundings and (3) the extent to which distance to water and rainfall influence ungulate densities. The results revealed that herbivore mean density differed significantly between the three EBPs of Satara and across their fire treatments. N’Wanetsi showed the highest density (0.30 animals/ha), whilst the lowest was found at Marheya (0.12 animals/ha). Overall, pre-drought density was higher on the annual plots (0.56 animals/ha), whilst higher post-drought density was evidenced on the triennial plots (0.80 animals/ha). On average, there were significantly higher herbivore densities on the EBPs (2.54 animals/ha) compared to the surrounding matrix at the larger scales of the Satara management section (0.15 animals/ha) and the central KNP (0.18 animals/ha). A positive correlation between herbivore mean density estimate and distance to water was shown. However, grazer mean density across fire treatments was strongly correlated to rainfall.Conservation implications: Given the variation in fire regimes and their application, and the non-uniform and elevated herbivore densities of the EBPs, inferences from the EBPs cannot be made to the larger KNP. The trials should rather be viewed as an isolated, fire herbivory experiment. It is also recommended to align the experiment with South African National Parks’ mandate by including biodiversity parameters like small mammals and insects in the monitoring of the plots.
The Cape Town International Convention Centre from the inside: The family physicians’ view of the ‛Hospital of Hope’
Authors: Reid Steve , Ras Tasleem , Von Pressentin Klaus
Published: October 2020

This short report captures the week-by-week reflections of a group of family physicians who joined the clinical and operational management teams tasked with providing the in-patient service of an 862-bed COVID-19 field hospital. The ‘Hospital of Hope’ at the Cape Town International Convention Centre (CTICC) was established as an intermediate care facility specifically to cope with the effects of the COVID-19 pandemic in Cape Town metropole. In an extraordinary feat of engineering, the conference centre floor was transformed within a matter of weeks into wards with piped oxygen at each bed. Whilst the emergency medicine specialists took the lead in designing and commissioning the facility, the medical management and staff were drawn mostly from family physicians. This report is a short reflection on the experience of the first 4 weeks of managing patients in this repurposed space. Our insights evolved during various formal and informal learning conversations as the in-patient service became more organised over time. We hope that these insights, as well as the process of reaching them, will assist other colleagues in serving their communities during this difficult moment in history; moreover, it may reflect a renewed appreciation for team-based interdisciplinary efforts in achieving person-centred care.
Young students’ understanding of mathematical equivalence across different schools in South Africa
Authors: McAuliffe Sharon , Tambara Cosmas , Simsek Emine
Published: October 2020

Background: Mathematical equivalence is a critical element of arithmetic understanding and a key component of algebraic thinking which is necessary for success in all levels of mathematics. Research studies continue to highlight misconceptions related to equivalence and reveal that many primary school students have a narrow and limiting view of the equals sign as an operation.Aim: This study aims to investigate young students’ understanding of mathematical equivalence in South Africa with a particular focus on their interpretations of the equals sign.Setting: Research data was obtained from students across six schools from different contexts within the Western Cape.Methods: We gave students an adapted standardised assessment containing 15 items related to equivalence.Results: Our analyses indicated that students focus more on the equals sign as an operation which involves calculating an answer. While some referred to equivalence as meaning the same as, most of them were inclined to accept the operational definition of the equals sign (i.e. the answer to the problem) as a better and preferred definition. In addition, student performance was poor on equation-solving problems and they rarely used comparative relational strategies in their solutions.Conclusion: The findings of this research confirmed that difficulties with equivalence reported by earlier research is widespread across this group of grade 4 students. This has implications for both curriculum, textbook and materials design and teacher professional development.
The anticipatory psychological contract of management graduates: Validating a psychological contract expectations questionnaire
Authors: Gresse Werner G. , Linde Barend J.
Published: October 2020

Background: It was proposed that if we assess an individual’s mental schema, it may facilitate a better understanding of the psychological contract formation process. This will add a theoretical contribution to the anticipatory psychological contract research, as it will enhance our understanding of the specific terms of the psychological contract, which are only present during the organisation entry phase.Aim: We aimed at developing and validating an instrument to measure the psychological contract expectation of university graduate labour market entrees. This information could enhance our knowledge of both the anticipatory psychological contract and psychological contract development.Setting: The research was conducted on third-year students from two different campuses of a South African university. The sample consisted of a total of 316 participants.Methods: We used an exploratory quantitative research approach to measure prospective employees’ anticipatory psychological contract. The newly developed Psychological Contract Expectations Questionnaire (PCEQ) was administered and analysed.Results: Results indicated that some of the instruments within the PCEQ are reliable and valid to measure the anticipatory psychological contract of graduates. The descriptive statistics and correlation coefficient results clearly enhanced our understanding of how the anticipatory psychological contract works.Conclusion: Our research contributes to anticipatory psychological contract research by introducing the PCEQ questionnaire to effectively measure the anticipatory obligations, anticipatory expectations, entitlement and anticipatory state of the psychological contract of prospective employees’ mental schema.
Comparison between high-velocity low-amplitude manipulation and muscle energy technique on pain and trunk neuromuscular postural control in male workers with chronic low back pain: A randomised crossover trial
Authors: Sturiona Leandro A. , Nowotny Alexandre H. , Barillecb Fabrice , Barette Gilles , Santosa Gabriela K. , Teixeirac Fellipe A. , Fernandes Karen P. , Da Silva Rubens
Published: October 2020

Background: A therapeutic recommendation for restoring function in individuals with chronic low back pain (CLBP) is manual therapy through manipulative spinal or muscle energy techniques.Objectives: To compare the effectiveness of two osteopathic manipulative techniques on clinical low back symptoms and trunk neuromuscular postural control in male workers with CLBP.Method: Ten male workers with CLBP were randomly allocated to two groups: high-velocity low-amplitude (HVLA) manipulation or muscle energy techniques (MET). Each group received one therapy per week for both techniques during 7 weeks of treatment. Pain and function were measured by using the Numeric Pain-Rating Scale, the McGill Pain Questionnaire and the Roland Morris Disability Questionnaire. The lumbar flexibility was assessed by Modified Schober Test. Electromyography (EMG) and force platform measurements were used for evaluation of trunk muscular activation and postural balance, respectively at three different times: baseline, post intervention, and 15 days later.Results: Both techniques were effective (p 0.01) in reducing pain with large clinical differences (-1.8 to -2.8) across immediate and after 15 days. However, no significant effect between groups and times was found for other variables, namely neuromuscular activation and postural balance measures.Conclusion: Both techniques (HVLA thrust manipulation and MET) were effective in reducing back pain immediately and 15 days later. Neither technique changed the trunk neuromuscular activation patterns nor postural balance in male workers with LBP.Clinical implications: These results may facilitate clinical decision-making for CLBP management in physiotherapy programs.
Гостра респіраторна хвороба, спричинена коронавірусом SARS-CоV-2 у Збройних Силах України
Authors: Savytskyi V. L. , Kozhokaru A. A. , Ohorodniychuk I. V. , Ivachevska N. S. , Dobroshtan D. I. , Narozhnov V. V. , Yakymets V. M.
Published: October 2020

Мета. Здійснити порівняльний аналіз захворюваності на COVID-19 серед військовослужбовців Збройних Сил та цивільним населенням України на території відповідальності регіональних санітарно-епідеміологічних управлінь КМС ЗС України для подальшого вивчення особливостей перебігу хвороби та наслідків інфікування вірусом SARS-CoV-2.

Матеріали та методи. Аналізували опубліковані у ЗМІ характеристики епідеміологічного стану наслідків інфікування вірусом SARS-CoV-2 у країнах з найбільшою на час дослідження чисельністю інфікованих осіб, суміжних до України державах: захворюваність на COVID-19 серед військовослужбовців та працівників ЗС України вивчали з використанням електронної бази щоденних донесень щодо стану поширення гострої респіраторної хвороби COVID-19, спричиненої коронавірусом SARS-CoV-2 на території України та хід виконання заходів по запобіганню її поширення у ЗС України надану СЕУ КМС ЗС України. Методи дослідження – бібліосемантичний, епідеміологічнй, соціологічний та концептуального моделювання.

Результати. У статті розглянуто проблему захворюваності на гостру респіраторну хворобу, спричинену коронавірусом SARS-CоV-2 (далі – COVID-19) серед населення України та військовослужбовців Збройних сил. У дослідженнях відслідковується різниця у співвідношенні кількісних показників серед військовослужбовців, які одужали – 2 247осіб (79,5%) та цивільного населення –92 360(44,0%) України. Зазначено, що з точки зору безпеки держави COVID-19 – це є приклад біологічної атаки на суспільство країни і готовність держави до захисту населення.

Висновки. За результатами проведеного аналізу спостерігається різниця у співвідношенні кількісних показників серед одужавших військовослужбовців – 2 247 осіб (79,5%) та цивільного населення – 92 360 (44,0%) України при цьому левову частку виявлених позитивних результатів ПЛР-тестування на SARS-CoV-2 спостерігається серед військовослужбовців частин, які дислоковані на території відповідальності в/ч А 4520 (36.1%) та в/ч А 0972 (35.3%), що корелює з показниками захворюваності цивільного населення цих регіонів. З точки зору безпеки держави, COVID-19 – це є приклад біологічної атаки на суспільство країни і готовність держави до захисту населення. Висока здатність коронавірусів до мутації та поширення у популяції людей, смертність від ускладнень, у тому числі від пневмонії, а з іншого боку – високий відсоток безсимптомного та легкого перебігу хвороби обумовлює виникнення суперечок та напруження у суспільстві, створює величезний тиск на економіку держави. Боротьба з новими вірусними захворюваннями вимагає посиленого розвитку сучасних методів лабораторної діагностики (ПЛР, ІФА), підготовки фахівців вірусологів, впровадження швидких діагностичних тест-систем в лікувальні заклади ЗС України.
Особистісні властивості слухача як передумова професійного становлення та успішної адаптації військового медика
Authors: Trinka I. S. , Kalnysh V. V. , Mudryk N. I. , Voloshyn V. O.
Published: October 2020

Вступ. Професійна підготовка особистості  військового лікаря є динамічним процесом професійного самовизначення, пов’язаним з особистісними кризовими явищами. Причинами внутрішньо особистісних конфліктів у процесі здобуття професійної освіти є низький адаптивний рівень психічних можливостей особистості, який не відповідає вимогам навчально-виховної діяльності  і проявляється у високому рівні тривожності, агресивності.

Метою дослідження було визначення особистісних характеристик та перевірка рівня адаптаційних можливостей слухачів – майбутніх військових лікарів.

Матеріали і методи. Використовувалась методика багатофакторного дослідження особистості Р. Кеттела (16 РF опитувальник). Статистичний аналіз отриманих результатів опитування 135 слухачів проводився методом варіаційної статистики та кластерного аналізу.

Результати. Експериментальні дані з допомогою кластерного аналізу методом k-середніх були поділені на дві підгрупи з різними психологічними характеристиками за комплексом особистісних якостей, які умовно були названі «активні» та «обережні». Встановлено, що слухачі підгрупи «обережних» характеризуються як більш вразливі до невдач, обережні, з сильним почуттям обов’язку, чутливі до оцінки оточуючих, дещо усамітнені, мають достовірно вищі результати навчання в порівнянні з слухачами підгрупи «активних», а слухачі підгрупи «активних» є більш комунікабельними, що є певною перевагою для військової служби. Для представників цієї підгрупи більшу увагу потрібно приділяти якості їх навчання. Показано, що визначені у слухачів особистісні характеристики в цілому підтверджують наявність у них професійно значимих для військового медика рис характеру: самовпевненість, високі розумові здібності, кмітливість, наявність абстрактного мислення, товариськість, домінантність, стриманість, емоційна стійкість, самостійність, незалежність в судженнях та в поведінці, усвідомлена висока нормативність поведінки, осмислене дотримання норм і правил, наполегливість у досягненні мети, відповідальність, мужність, розсудливість, довірливість, доброзичливість щодо інших людей.

Висновки. Запропоновано актуальні шляхи подальшого удосконалення навчального процесу та управління процесом формування професійного світобачення у слухачів факультету підготовки військових лікарів Української військово-медичної академії.
Чвертьсторічна історія розвитку кафедри анестезіології та реаніматології Української військово-медичної академії
Authors: Khytryi G. P. , Levchenko T. M.
Published: October 2020

Вступ. Висвітлення основних історичних моментів становлення кафедри анестезіології та реаніматології Української військово-медичної академії за 25 років є актуальним для відтворення цілісної картини історії кафедри, етапності та періодичності її реорганізації та розвитку. Дослідження вкладу тих науково-педагогічних працівників, які стояли біля витоків створення кафедри, а також тих, хто вносив зміни в навчальний процес, узагальнюючи досвід бойових дій на сході України, і сьогодні продовжує їх справу є важливим аспектом історико-медичного дослідження.

Мета. Розглянути питання процесу становлення і розвитку кафедри анестезіології та реаніматології Української військово-медичної академії.

Матеріали та методи. Матеріалами для статті служили нормативно-правові акти, що стосуються реформування системи військово-медичної освіти, звіти про роботу кафедри. Використано історичний, аналітичний і бібліосемантичний методи.

Результати. За період свого існування кафедра анестезіології та реаніматології УВМА внесла вагомий внесок у підготовку та перепідготовку фахівців як для медичних закладів Збройних Сил України, так і для медичних закладів МОЗ України. У процесі створення кафедри був збережений науковий потенціал її співробітників, їх досвід, наукові та практичні здобутки, що дозволило за відносно короткий термін сформувати науково-педагогічний і науковий колектив кафедри, ефективно організовувати навчальний процес з слухачами Української військово-медичної академії, лікарями-анестезіологами та лікарями інших спеціальностей лікувальних закладів Міністерства оборони України, розвивати наукову, методичну і виховну роботу науково-педагогічних працівників кафедри та вивести систему підготовки військових анестезіологів на якісно новий рівень. Завдяки плідній роботі співробітників кафедри відбулося 23 випуски слухачів-анестезіологів, підготовлено 191 військового лікаря-анестезіолога.

Висновки. За порівняно невеликий термін свого існування кафедра анестезіології та реаніматології УВМА внесла вагомий внесок у підготовку та перепідготовку фахівців як для Збройних Сил України, так і для інших військових формувань і лікувальних закладів України. На сьогоднішній день кафедра анестезіології та реаніматології єдина в Україні, яка здійснює післядипломну підготовку та перепідготовку військово-медичних кадрів за фахом «Анестезіологія та інтенсивна терапія» для зміцнення обороноздатності країни з урахуванням досвіду АТО/ООС.
A Novel Method for Output Characteristics Calculation of Electromagnetic Devices using Multi-kernel RBF Neural Network
Authors: Ding Feng , Gao Yunyun , Tian Jianhui
Published: October 2020

The action performance and reliability of electromagnetic devices is critical to the entire working system. In this paper, a new method for calculating the output characteristics of electromagnetic devices is proposed. This method uses the multi-kernel radial basis function neural network (MK-RBFNN) approximation modeling by the finite element calculation results at the key nodes. It obtains the output response of the electromagnetic device under different coil voltages and air gaps. The key of establishing a MK-RBFNN is to obtain the weight coefficients of each single-kernel radial basis function (RBF) model by using a heuristic weighting strategy. When the electromagnetic output characteristics is calculated in the optimization design of the electromagnetic device, this method solves the problem that the traditional method is difficult to balance the calculation accuracy and speed. The effectiveness of the method is verified by the calculation results of the electromagnetic torque of a typical electromagnetic relay.
A Modified Adaptive Integral Method for Analysis of Large-scale Finite Periodic Array
Authors: Zheng Mingxuan , Zhao Huiling , Zhao Zhonghui
Published: October 2020

A fast algorithm based on AIM is proposed to analyze the scattering problem of the large-scale finite array. In this method, by filling zeros into the local transformation matrix, the near and far fields are isolated thoroughly to eliminate the near correction process. In the far part, a 5-level block-toeplitz matrix is employed to avoid saving the idle grids without adding artificial interfaces. In the near part, only one local cube is required to compute the local translation matrix and near impedance matrix, which can be shared by all elements. Furthermore, the block Jacobi preconditioning technique is applied to improve the convergence, and the principle of pattern multiplication is used to accelerate the calculation of the scattering pattern. Numerical results show that the proposed method can reduce not only the CPU time in filling and solving matrix but also the whole memory requirement dramatically for the large-scale finite array with large spacings.
Design of Dual-Band Printed-Dipole Array Antenna with Omni-directional Radiation Behaviour
Authors: Floch Jean-Marie , Mersani Ameni , Hakim Bandar , Sedraoui Khaled , Rmili Hatem
Published: October 2020

In this paper, we present a compact array of 4 printed dipole antennas with ground plane, operating at 2.7 GHz and 5.2 GHz, designed for base station applications. First, the elementary printed dipole antenna, selected for its small size and good performances, is described. However, this kind of structures cannot cover two bands at the same time, which justify our proposal of a 4-elements network. Next, the 4-elements array is simulated, optimized, and measured to proof its performances with good agreement between the measurements and simulations. The measured gain of the 4-dipoles array is 4.21 dBi and 6.15 dBi for both operating frequencies 2.7 GHz and 5.2 GHz, respectively.
Multi-Mode Narrow-Frame Antenna for 4G/5G Metal-Rimmed Mobile Phones
Authors: Yang Ming , Sun Yu-Fa , Liao Tong-Qing
Published: October 2020

A novel multi-mode narrow-frame antenna is presented for 4G/5G metal-rimmed mobile phones in this paper. The proposed antenna is constituted by a monopole antenna and a coupling strip, which is printed on FR4 substrate with thickness of 0.8 mm. The overall area occupied by the antenna is only 60 × 10.4 mm2, which can be used as a promising narrow-frame antenna. The simulated results shows that the return loss of the antenna can provide four operating bandwidths of 822– 961 (band 1), 1697–3075 (band 2), 3280–3835 (band 3) and 4475–5050 MHz (band 4), which respectively cover 824–960, 1710–2690, 3300–3600 and 4800–5000 MHz in 4G/5G communication systems. In order to verify the accuracy of theoretical analysis and simulated results, the proposed antenna is fabricated and measured. The experimental results are basically consistent with the simulated results, suggesting that the presented antenna has attractive performance for mobile phones.
Realization of Modified Elliptical Shaped Dielectric Lens Antenna for X Band Applications with 3D Printing Technology
Authors: Belen Aysu , Tetik Evrim
Published: October 2020

Placing dielectric lens structures into an antenna's aperture has proven to be one of the most reliable methods of enhancing its gain. However, the selected material and the prototyping method usually limit their fabrication process. With the advances in 3D printing technology and their applications, the microwave designs that were either impractical or impossible in the past to manufacture using traditional methods, are now feasible. Herein, a novel prototyping method by using 3D-printer technology for low-cost, broadband, and high gain dielectric lens designs has been presented. Firstly, the elliptical lens design has been modeled in the 3D EM simulation environment. Then fused deposition modeling based 3D-printing method has been used for the fabrication of the dielectric lens. The measured results of the 3D printed antenna show that the lens antenna has a realized gain of 17 to 20.5 dBi over 8-12 GHz. Moreover, the comparison of the prototyped antenna with its counterpart dielectric lens antenna in the literature has indicated that the proposed method is more efficient, more beneficial, and has a lower cost.
CPW-Fed Wide Band Micro-machined Fractal Antenna with Band-notched Function
Authors: Kumar Ashwini , Pharwaha Amar
Published: October 2020

In this paper, a straightforward yet effective design methodology to design wideband antenna with band notched characteristics has been proposed. Sierpinski carpet fractal geometry has been used to realize the antenna structure. Co-planar waveguide feed is used with a novel structure to achieve larger impedance bandwidth and band notching characteristics. Proposed antenna is designed using High Frequency Structure Simulator (HFSS) on a low cost FR4 substrate (ɛr=4.4) which resonates at three frequencies 1.51 GHz (1.19-2.06GHz), 6.53 GHz and 8.99 GHz (4.44-9.54 GHz) while a band is notched at 10.46 GHz (9.32-11.92 GHz). The proposed antenna has an electrical dimension of 0.36 λm× 0.24 λm, here λm is the wavelength with respect to lowest resonating frequency of the antenna. The resonating and radiation characteristics of the antenna are verified experimentally. Further, investigations are made to achieve easy integration of the antenna to the monolithic microwave integrated circuits. For that the antenna has been designed on micro-machined high index Silicon substrate which improve matching and gain of the antenna. The results of the micro-machined Sierpinski carpet fractal antenna are highly convincing over the conventional FR4 based antenna.
Analysis of Crosstalk Problem in Multi-Twisted Bundle of Multi-Twisted Wire Based on BSAS-BP Neural Network Algorithm and Multilayer Transposition Method
Authors: Huang Chao , Zhao Yang , Yan Wei , Liu Qiangqiang , Zhou Jianming , Meng Zhaojuan , Mueed Abdul
Published: October 2020

Twisted wire used in complex systems has the ability to reduce electromagnetic interference, but crosstalk within the wire is not easy to obtain. This paper proposes a method to predict the crosstalk of multi-twisted bundle of multi-twisted wire (MTB-MTW). A neural network algorithm based on back propagation optimized by the beetle swarm antennae search method (BSAS-BPNN) is introduced to mathematically describe the relationship between the twist angle of the wire harness and the per-unit-length (p.u.l) parameter matrix. Considering the symmetry of the model, the relationship between the unresolved angle of the BSAS-BPNN algorithm and the p.u.l parameter matrix is processed by using the multilayer transposition method. Based on the idea of the cascade method and the finite-difference time-domain (FDTD) algorithm in Implicit-Wendroff format, the crosstalk of the wire is obtained. Numerical experiments and simulation results show that the new method proposed in this paper has better accuracy for the prediction of the model. The new method can be generalized to the MTB-MTW model with any number of wires. All theories provide preliminary theoretical basis for electromagnetic compatibility (EMC) design of high-band circuits.
Resolving mystery behind autonomous retrogression of low-grade gliomas; a systematic review
Authors: Syed Ijlal Ahmed  , Syeda Beenish Bareeqa  , Syeda Sana Samar  , Syed Daniyal Ahmed Jilanee
Published: October 2020

Abstract

Objective: To review evidence-based data on spontaneous retrogression of low-grade gliomas with respect to interval till regression, type of glioma and patient outcome.

Method: The systematic review comprised medical literature in English language published from January 1997 to January 2017 on Scopus, PubMed and Google Scholar databases to establish consensus about the possible mechanism of spontaneous regression, the role of therapeutic intervention and failure of management strategies in low-grade gliomas. Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines were followed during the review.

Results: Of the 176 articles identified, 73(41.5%) were shortlisted for detailed assessment. Of them, 10(13.7%) were included; 5(50%) case reports and 5(50%) case series. There were 23 cases of spontaneous regression; 15(65.2%) males and 8(34.7%) females. The interval of regression varied from 3 months to 15.5 years, and the most commonly presenting low-grade glioma type was optic pathway glioma 11(47.4%).

Conclusion: The phenomenon of regression was most evident in optic pathway glioma. Literature suggested that low-grade gliomas should undergo serial imaging before implying any therapeutic intervention. However, the evidence-based proof, large-scale experimental studies and ethical considerations are still required to standardise this strategy.

Key Words: Pilocytic astrocytomas, Desmoplastic infantile ganglioglioma, DIG, Desmoplastic infantile astrocytomas, DIA, Diffuse astrocytoma, Spontaneous regression.

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Há tendência para agrupamento segmental em classes naturais no balbucio e nas palavras iniciais?
Authors: Baia Maria de Fátima de Almeida
Published: October 2020

Este estudo segue a perspectiva dos Sistemas Adaptativos Complexos e investiga se há evidências na aquisição do português brasileiro (doravante PB) para combinações preferenciais de CV no balbucio e nas produções iniciais como MacNeilage, Davis et al. propõem. Os autores observam em dados de crianças adquirindo diferentes línguas ocorrências de três padrões combinatórios preferenciais em sílaba CV: consoantes coronais produzidas com vogais anteriores, consoantes dorsais produzidas com vogais posteriores, e consoantes labiais com vogais centrais. Essas combinações segmentais compartilham posições no trato vocal e são compatíveis com as classes naturais propostas por Clements e Hume no modelo unificado de traços, no qual vogais e consoantes podem ser classificadas como labiais, dorsais e coronais. Embora este estudo não siga uma perspectiva inatista, o uso de classes naturais na análise não é contraditório, pois assim como há proposta inatista, há proposta emergentista para o fenômeno, segundo a qual os padrões comuns fônicos seriam resultados de mudanças históricas. Após análise de dados longitudinais de um estudo de caso, concluímos que os dados de balbucio e iniciais do PB não sustentam a hipótese de que as combinações iniciais seriam de segmentos de uma mesma classe natural.
variação na produção de sinais da Libras à luz da Fonologia Gestual
Authors: Xavier André Nogueira
Published: October 2020

Os sinais da língua brasileira de sinais, Libras, são tipicamente realizados com uma ou duas mãos. Apesar disso, observa-se a ocorrência de variação no número de mãos de alguns desses sinais. Este trabalho apresenta os resultados de um experimento realizado para determinar se (1) a variação no número de mãos na produção de três sinais da Libras (PRECISAR, QUERER e JÁ) decorre da coarticulação, ou seja, da inluência do número de mãos do sinal precedente (coarticulação perseveratória) ou seguinte (coarticulação antecipatória) sobre o deles, e (2) se, assim como tem sido demonstrado para as línguas orais, o aumento na taxa de elocução também aumenta a ocorrência de coarticulação. O experimento contou com a participação de quatro sinalizantes surdos (dois homens e duas mulheres) e consistiu de três partes. A primeira, uma entrevista, objetivou eliciar os sinais em análise em sua forma isolada. A segunda, um jogo, eliciou tais sinais em diferentes contextos fonético-fonológicos, mas de uma forma lúdica. Por im, a terceira também consistiu na eliciação dos sinais-alvo em contextos fonético-fonológicos distintos, porém, diferentemente do jogo, se restringiu à sinalização de cada enunciado em duas taxas (normal e rápida). Os resultados mostram que a ocorrência de coarticulação varia em função do sujeito, do sinal, do contexto e da taxa.
question of syllable structure: contextual acquisition of English /p/ and /k/ in a laboratory setting
Authors: John Paul , Cardoso Walcir
Published: October 2020

Using a laboratory approach, this study investigates the acquisition of the stops /p k/ by Brazilian Portuguese (BP) learners of English in three contexts: in word-medial position before (1) /t/ or (2) /n/ and (3) in word-final position. Because BP allows only /S r l N/ in these positions, learners tend to resort to a process of i-epenthesis (e.g., cha[pi]ter, te[ki]nique, magi[ki]). While /p k/ clearly syllabify as onsets after i-epenthesis, there is no consensus on their syllabic ailiation in the target contexts. Three views can be distinguished. According to orthodox phonology, /p k/ syllabify as codas in all three locations. From the Government Phonology view, however, /p k/ are codas only word-medially before /t/; in the other two contexts, they syllabify as onsets of empty nuclei. Finally, Strict CV proposes that /p k/ in all three cases are onsets of empty nuclei. In previous research, we established that /p k/ are acquired diferentially in medial position before /t/ and in final position, the latter being the more challenging context. This finding provides tentative support for the Government Phonology claim that /p k/ instantiate a diferent syllabification in these two contexts and hence constitute a distinct learning challenge. To explore the matter further, we include here the context of /p k/ in word-medial position before /n/. A set of non-word-learning tasks and pre/post production tests determine that this context patterns with word-final consonants, as the Government Phonology view predicts. Statistical results support the prediction.
Análise longitudinal de vogais do inglês-L2 de brasileiros
Authors: Lima Jr. Ronaldo M.
Published: October 2020

Este artigo relata dados dos dois primeiros semestres de um estudo longitudinal do percurso de aquisição das vogais [i ? ? æ u ?] de alunos de graduação em Letras-Inglês de uma universidade brasileira. Os dados foram coletados no início do segundo e terceiro semestres, e consistiram de frases-guia com palavras CVC, com o V contendo as vogais-alvo. A análise aqui apresentada é de qualidade espectral, com medições de F1 e F2. A interpretação dos dados parte do pressuposto de que as línguas e seus processos de aquisição são sistemas complexos e dinâmicos, e que, por sua natureza dinâmica, o processo de aquisição de uma língua estrangeira (L2) é mais efetivamente analisado por meio de uma metodologia individual e longitudinal. Também por causa da natureza dinâmica do processo de aquisição fonológica de uma L2, adota-se neste trabalho uma epistemologia que une a fonética e a fonologia, considerando-as como duas dimensões de um mesmo sistema. Os resultados cumprem três propósitos: a) registram os dados de F1 e F2 de 11 alunos de Letras-Inglês no início do segundo e terceiro semestres da graduação; b) revelam o início da criação de categorias fonético-fonológicas distintas para [u] e [?] na interlíngua de dois aprendizes; e c) reforçam o argumento a favor de uma metodologia individual e longitudinal para uma análise dinâmica do desenvolvimento fonológico de L2.
Efeitos do início da exposição linguística na consciência fonológica da Libras (L1) em crianças e adolescentes surdos
Authors: Cruz Carina Rebello , Finger Ingrid , Fontes Ana Beatriz Arêas da Luz
Published: October 2020

O presente estudo verificou o nível de consciência fonológica na Libras em crianças e adolescentes surdos bilíngues Libras/Português, com faixa etária entre 9 e 14 anos, com início da exposição à Libras, primeira língua, entre 0-4 anos de idade e após 4 anos de idade (precoce e tardia). A investigação foi conduzida por meio de um Teste de Consciência Fonológica da Libras (TCF-Libras) que contemplou os parâmetros configuração de mão (CM), locação/ponto de articulação (L) e movimento (M). O TCF-Libras foi apresentado em um computador com o software E-Prime, que registrou as respostas dos participantes (percentual de erro e tempo de resposta) no julgamento dos parâmetros CM, L e M. Os resultados revelaram efeitos positivos da aquisição precoce na consciência fonológica da Libras, corroborando com estudos anteriores sobre efeitos do início da aquisição da linguagem, em diferentes níveis linguísticos. Os achados reforçam a importância de as crianças surdas serem expostas à Libras desde o nascimento ou o mais cedo possível, o que permite o acesso completo de informações linguísticas, visando garantir o processo de aquisição da linguagem em período análogo às crianças ouvintes, e impedir a instalação de atraso linguístico e/ou comprometimentos futuros no desenvolvimento.
percepção da vogal /a/ do espanhol, em contextos nasais, por brasileiros
Authors: Brisolara Luciene Bassols , Matzenauer Carmen Lúcia Barreto
Published: October 2020

Este estudo propõe-se investigar a percepção da vogal /a/ do espanhol, em contextos nasais, por falantes nativos de português brasileiro (PB), estudantes do Curso de Licenciatura em Letras Português-Espanhol de uma universidade do sul do Brasil. Considerando que, no PB, a nasalização fonética é recorrente e atinge mais contextos do que no espanhol, buscamos verificar se os estudantes conseguem perceber quando a vogal /a/ no espanhol é produzida como oral ou nasal, ou se, por influência do português, têm a percepção de nasalidade mesmo em contextos não nasalizados, segundo a literatura, no espanhol. O corpus para a realização da pesquisa foi constituído de uma amostra de quinze estudantes do primeiro semestre do Curso de Letras, com idade entre 18 e 49 anos. Os estudantes foram submetidos a quatro testes de percepção – três de discriminação e um de identificação –, que foram criados no software TP, especificamente para o presente estudo. A análise do processo de percepção da vogal /a/, em contextos nasais, foi feita com base nos pressupostos do Modelo de Aprendizagem de fala (SLM), incluindo também tratamento estatístico dos resultados. Os dados apontaram melhores resultados nos testes de discriminação do que no teste de identificação, o que foi atribuído ao tipo de processamento por cada um exigido, e a dificuldade de percepção da vogal nasalizada no espanhol foi entendida como decorrente da proximidade fonética entre a L1 e a L2, fazendo resultar a percepção de uma categoria já existente na sua L1, especialmente por ser alofônica a nasalidade vocálica na L2.