bluuebunny/crossref_metadata_2025 huggingface dataset:
Microbiota profiling with long amplicons using Nanopore sequencing: full-length 16S rRNA gene and the 16S-ITS-23S of the rrn operon
Authors: Cuscó Anna , Catozzi Carlotta , Viñes Joaquim , Sanchez Armand , Francino Olga
Published: August 2019

Background: Profiling the microbiome of low-biomass samples is challenging for metagenomics since these samples are prone to contain DNA from other sources (e.g. host or environment). The usual approach is sequencing short regions of the 16S rRNA gene, which fails to assign taxonomy to genus and species level. To achieve an increased taxonomic resolution, we aim to develop long-amplicon PCR-based approaches using Nanopore sequencing. We assessed two different genetic markers: the full-length 16S rRNA (~1,500 bp) and the 16S-ITS-23S region from the rrn operon (4,300 bp).

Methods: We sequenced a clinical isolate of Staphylococcus pseudintermedius, two mock communities and two pools of low-biomass samples (dog skin). Nanopore sequencing was performed on MinION™ using the 1D PCR barcoding kit. Sequences were pre-processed, and data were analyzed using EPI2ME or Minimap2 with rrn database. Consensus sequences of the 16S-ITS-23S genetic marker were obtained using canu.

Results: The full-length 16S rRNA and the 16S-ITS-23S region of the rrn operon were used to retrieve the microbiota composition of the samples at the genus and species level. For the Staphylococcus pseudintermedius isolate, the amplicons were assigned to the correct bacterial species in ~98% of the cases with the16S-ITS-23S genetic marker, and in ~68%, with the 16S rRNA gene when using EPI2ME. Using mock communities, we found that the full-length 16S rRNA gene represented better the abundances of a microbial community; whereas, 16S-ITS-23S obtained better resolution at the species level. Finally, we characterized low-biomass skin microbiota samples and detected species with an environmental origin.

Conclusions: Both full-length 16S rRNA and the 16S-ITS-23S of the rrn operon retrieved the microbiota composition of simple and complex microbial communities, even from the low-biomass samples such as dog skin. For an increased resolution at the species level, targeting the 16S-ITS-23S of the rrn operon would be the best choice.
Adverse events with ayurvedic medicines- possible adulteration and some inherent toxicities
Authors: Paudyal Buddhi , Thapa Astha , Sigdel Keshav Raj , Adhikari Sudeep , Basnyat Buddha
Published: August 2019

Ayurvedic medicine, a traditional system of medicine practiced in the Indian subcontinent is considered to be devoid of adverse effects. We report three cases which highlight the possibility of adverse events related with the use ofwith the use of ayurvedic products. A 35 years old woman with hepatitis took ayurvedic powder medicine and with swarnabhasma (gold salt)s and had her liver injury worsened, possibly due to alkaloids, and developed nephrotic syndrome, possibly due to and gold salt. A 57 years old hypertensive man was taking ayurvedic medicine containing reserpine which had long been withdrawn from the allopathic system of medicine due to wide range of side effects. A 47 years old woman with rheumatoid arthritis was taking an unknown tablet containing a steroid as an adulterant for 2 years and developed side effects typical of steroid excess. We like to highlight the fact that ayurvedic medicines do have propensity to may cause adverse effects due to adulterations or inherent constituents like alkaloids, and hence are may not always be completely safe.
Downtime in the Automotive Industry Production Process – Cause Analysis
Authors: Wolniak Radosław
Published: August 2019

Purpose: The article presents an analysis of the application of selected quality management methods and tools in order to identify factors affecting downtimes in the production line, illustrated with an example of the automotive industry.Methodology/Approach: The paper contains an analysis of downtimes in the production process using selected methods and tools of quality management. The authors used a combination of tools and methods to carry out the analysis. In this concept, first, the 5WHY method and the Ishikawa diagram were used.Findings: The research results presented in the paper suggest that better results can be achieved by using a set of quality tools instead of one particular tool. The authors found that using a wide range of quality tools can be useful to reduce downtimes on the production line.Research limitation/implication: The major limitation of the paper is that it is based on one case of an organisation from the automotive industry. In the future, it will be necessary to conduct studies in more organisations so as to find out if the same result can be achieved.Originality/Value of paper: The article is concerned with the use of quality management methods and tools to analyse production line breakdowns. Until present, in subject literature, the causes of downtimes have been analysed without differentiating between planned and unplanned downitmes of the production line.
Six Sigma: Main Metrics and R Based Software for Training Purposes and Practical Industrial Quality Control
Authors: Costa Ana Rita , Barbosa Carla , Santos Gilberto , Alves M. RUi
Published: August 2019

Purpose: To clarify the different types of data likely to occur in any service or industrial process, the main applicable statistics for each type of data and the Six Sigma metrics that allow characterising and benchmarking organisational processes.Methodology/Approach: A short reference to the statistical process control is carried out, from Shewhart’s works to Motorola’s achievements, followed by a short discussion of the use of Six Sigma tools as a part of today’s total quality approaches, and by a discussion of the continuous, attribute and counting data worlds and their main applications in process analysis. Because many quality professionals may have difficulties dealing with engineering perspectives, a review of main classic and Six Sigma process metrics is done with examples. Complementing discussions, four functions written in the R language are presented, which can deal with real organisational data, or can be used for training purposes.Findings: The functions developed provide useful graphical displays and calculate all necessary metrics, having the ability to let the user provide theoretical values for training activities. Real and simulated case studies help understanding data worlds and respective Six Sigma metrics.Research Limitation/implication: This paper reports an intentionally simple theoretical perspective of Six Sigma metrics and friendly software which is available to all interested professionals on request to the authors.Originality/Value of paper: The paper presents clear definitions of main data types and metrics and is supported by a set of four new functions that can be used by any researcher with a minimum knowledge of the R software.
How Do Sales Efforts Pay Off? Dynamic Panel Data Analysis in the Nerlove–Arrow Framework
Authors: Chung Doug J. , Kim Byungyeon , Park Byoung G.
Published: August 2019

This paper evaluates the short- and long-term value of sales representatives’ detailing visits to different types of physicians. By understanding the dynamic effect of sales calls across heterogeneous physicians, we provide guidance on the design of optimal call patterns for route sales. The findings reveal that the long-term persistence effect of detailing is more pronounced for specialist physicians, whereas the contemporaneous marginal effect is higher for generalists. The paper also provides a key methodological insight to the marketing and economics literature. In the Nerlove–Arrow framework, moment conditions that are typically used in conventional dynamic panel data methods become vulnerable to serial correlation in the error structure. We discuss the associated biases and present a robust set of moment conditions for both lagged dependent and predetermined explanatory variables. Furthermore, we show that conventional tests to detect serial correlation have weak power, resulting in the misuse of moment conditions that leads to incorrect inference. Theoretical illustrations and Monte Carlo simulations are provided for validation.

This paper was accepted by Matthew Shum, marketing
Data-Driven Appointment-Scheduling Under Uncertainty: The Case of an Infusion Unit in a Cancer Center
Authors: Mandelbaum Avishai , Momčilović Petar , Trichakis Nikolaos , Kadish Sarah , Leib Ryan , Bunnell Craig A.
Published: August 2019

Service systems are often stochastic and preplanned by appointments, yet implementations of their appointment systems are prevalently deterministic. At the planning stage of healthcare services, for example, customer punctuality and service durations are often assumed equal their means—and this gap, between planned and reality, motivated our research. Specifically, we consider appointment scheduling and sequencing under a time-varying number of servers, in a data-rich environment where service durations and punctuality are uncertain. Our data-driven approach, based on infinite-server queues, yields tractable and scalable solutions that accommodate hundreds of jobs and servers. We successfully test our approach against near-optimal algorithms (which exist for merely single-servers). This entails the development of a data-driven robust optimization approach with novel uncertainty sets. To test for practical performance, we leverage a unique data set from a cancer center that combines real-time locations, electronic health records, and appointments log. Focusing on one of the center’s infusion units (roughly 90 daily appointments, 25+ infusion chairs), we reduce cost (waiting plus overtime) on the order of 15%–40% consistently, under a wide range of experimental setups.

This paper was accepted by Assaf Zeevi, stochastic models and simulation.
Whistle Blowing, Forced CEO Turnover, and Misconduct: The Role of Socially Minded Employees and Directors
Authors: Bereskin Frederick , Campbell Terry , Kedia Simi
Published: August 2019

We examine the response of prosocial employees and boards of directors to corporate misconduct. We develop several proxies for the presence of prosocial employees and directors based on the density of social networks and social capital in the county of the firms’ headquarters and companies’ relevant corporate social responsibility ratings. We document that proxies for prosocial employees and directors are associated with an increase in whistle blowing and forced chief executive officer turnover in a sample of firms that engage in misconduct. The higher expected cost of misconduct in firms with prosocial employees is associated with a lower likelihood of misconduct. Our findings highlight the role of nonfinancial imperatives of employees and directors in mitigating misconduct.

This paper was accepted by Suraj Srinivasan, accounting.
OM Forum—Healthcare Operations Management: A Snapshot of Emerging Research
Authors: Dai Tinglong , Tayur Sridhar
Published: August 2019

A new generation of healthcare operations management (HOM) scholars is studying timely healthcare topics (e.g., organization design, design of delivery, and organ transplantation) using contemporary methodological tools (e.g., econometrics, information economics, and queuing games). A distinguishing feature of this stream of work is that it explicitly incorporates behavior, incentive, and policy considerations arising from the entanglements across multiple entities that make up the complex healthcare ecosystem. This focus is a departure from an earlier generation of research that primarily centered on optimizing given operations of a single entity. This paper provides an introduction to this burgeoning field and maps out research opportunities. We start with identifying key entities of healthcare delivery, financing, innovation, and policymaking, illustrating them on a healthcare ecosystem map (HEM). Next, we explore the HOM literature examining the interactions among various entities in the HEM. We then develop a taxonomy for the recent HOM literature (published in Manufacturing & Service Operations Management, Management Science, and Operations Research between 2013 and 2017), provide a tool-thrust graph mapping methodological tools with research thrusts, and situate the HOM literature in context by connecting it with perspectives from medical journals and mass media. We close with a reference to technological innovations that have the potential to transform the healthcare ecosystem in future decades.
Employers' duty of care to district nursing team members: health and safety concerns with lone domiciliary visits
Authors: Duncan Monica
Published: August 2019

District nurses and their teams often work in isolation during domiciliary visits. As employers, providers of district nursing services have responsibility to ensure that appropriate policies and procedures are in place to keep district nursing teams safe. If the employer fails to do everything that was reasonable in the circumstances to keep the employee safe, the employer can be deemed to have breached their duty of care. Employees also have responsibility for their own health and wellbeing at work, and they are entitled by law to refuse to undertake work that is not safe, without fear of disciplinary action. Staff training in risk management, personal safety, handling aggressive behaviour, using safety devices such as mobile phone trackers, incident reporting and debriefing are essential for district nurses and their teams, as they face a steeply increased demand for their services and a severely compromised skill mix within their teams.
Recognition and assessment of dementia in primary care
Authors: Dening Karen Harrison
Published: August 2019

The majority of patients are diagnosed within a memory assessment service or a neurology clinic. However, early detection of a possible dementia is often done in a primary care setting. Dementia diagnosis has been seen by some as a ‘tick-box exercise’ but there are significant benefits to patients and their families when screening or testing for dementia is carried out early, especially in supporting the patients management of other comorbid or long-term conditions. Community nurses have a key role in identifying patients who may have the signs and symptoms of dementia by enabling them to access a timely diagnosis.
Sharing the decision about VBAC: introducing the ARCS-V motivational learning model
Authors: Stockdale Janine , Lawther Lorna , McKenna Jennifer , O'Neill Deirdre
Published: August 2019

Shared decision-making is considered key to influencing women's motivation to choose vaginal birth after caesarean section (VBAC), as when women's self-determination is respected, they are more likely to avoid intervention. However, the shared decision-making conversation can be challenging.

This article introduces the ARCS-V (attention, relevance, confidence, satisfaction, volition), an model for understanding and responding to women's motivation to share the decision about VBAC vs repeat caesarean section. Each of the model's components are introduced, including the psychological basis for managing a shared conversation; capturing and holding women's attention on what they need to learn; matching the learning goals with women's personal goals; building their confidence to achieve their optimal birth; and ensuring they are satisfied with decision-making experience. When these educational conditions are met, women are more likely to use shared decision-making conversations to choose optimally.
Never be afraid to question practice: the professional dilemma of a student midwife
Authors: Dunn Cheryl
Published: August 2019

As a third-year caseloading student midwife, I experienced a professional dilemma during an intrapartum placement while working on a busy obstetric unit: to use vaginal examination to confirm full dilatation (a medical approach) or advocate normality and a woman-centred approach. This article explores the three influential forces that contributed to the dilemma: the culture of obstetric units, the midwife-woman relationship, and the importance of assertive behaviours to achieve autonomy. Through reflection and use of Gibbs' (1988) reflective cycle, I highlighted the need to develop my assertive skills, which also led me to make amendments to my own practice; this helped me transition from student to a newly qualified midwife.
Methodical foundations of forecasting the reliability of products of aviation and rocket and space technology
Authors: BIRYUKOV Vasilii I.
Published: August 2019

The study discusses various techniques and algorithms for determining the quantifiable characteristics of the reliability of products of aviation and rocket and space technology at the stages of research and development. The sequences of disaggregation of composite products into components and the drawing up of structural reliability schemes are given on the example of an electric rocket engine having mechanical units and electrical equipment of various types. Various methodological approaches are presented to determine the possibility of failure-free operation of the component parts of products, both with experience data on failure rates of elements and without official data on reliability. Recommendations are given to increase the VBR components, individual parts and the product as a whole.
Control of unmanned aerial vehicles during fire situation monitoring
Authors: EVDOKIMENKOV Veniamin N. , KIM Nikolay V. , KOZOREZ Dmitriy A. , MOKROVA Mariya I.
Published: August 2019

The issues of increasing the efficiency of fire situation monitoring are discussed, during which the search for objects of interest is being conducted to organize rescue operations and plan activities to fight the fire and reduce the consequences. Modern unmanned aerial vehicles equipped with vision systems, allow us to automatically explore the search area and detect various objects of interest. Monitoring is realized by controlling the trajectories and altitude of the aircraft, as well as receiving and analyzing images of the underlying surface, taken by onboard visual systems. The article offers a method for determining the altitude of flight of unmanned aerial vehicles during monitoring of the fire situation, taking into account the safety of aircraft and the conditions of observability of objects of interest. We consider some options for assessing the effectiveness of monitoring based on the search criteria of objects and the safety of unmanned aerial vehicles.
How does a rock musician teach? Examining the pedagogical practices of a self-taught rock musician–educator
Authors: Brook Julia , MacKay Robbie , Trimmer Chris
Published: August 2019

This research examines the pedagogical practices of a self-taught musician who teaches music at an elementary school in Canada. Research on the ways that popular musicians teach has shown that many teachers use a combination of informal and formalized structures. We used Personhood theory as a conceptual framework to illuminate how the context and disposition of the musician–teacher informs their pedagogy. These findings demonstrate how context and disposition inform pedagogical practices and the ways that the teacher’s personhood contributes to students’ learning. We collected data through interviews with the teacher and school principal, distributed questionnaires to students and observed performances. Findings show that one’s personhood can contribute to the medium, message and messenger within a music education setting. Personhood theory helps frame the nested nature of these relationships and these findings point to the need to support development of in-service and pre-service teachers’ personhood.
Effects of Chinese popular music familiarity on preference for traditional Chinese music: Research and applications
Authors: Tan Yunshu , Conti Lauren
Published: August 2019

Teaching and learning popular music and world musics are prominent topics in music education but often play a supplement role in the classroom. The main purpose of this quantitative experimental study was to investigate the effects of Chinese popular music on students’ familiarity and preference for its traditional version. Participants were undergraduate students from a university in the northeastern United States who completed a pre-test, minimum four weekly treatments and post-test. Results suggest participation in a world music course may contribute to preference for Chinese traditional music, but short-term exposure to popular versions of Chinese traditional music does not seem to contribute to preference for Chinese traditional music. A reason for this may be that popular music has its own cultures and characteristics that are not necessarily transferable to music from other music genres. In addition, the personality traits of open-mindedness or closed-mindedness showed significant influence over preference for traditional or popular music, respectively.
PERMACULTURA, O REENCONTRO COM O CUIDADO: o relato da experiência em um processo formativo com professores
Authors: Orsi Raquel Mafra , Rockett Ananda Nocchi
Published: August 2019

Este artigo apresenta o relato de uma Formação Continuada em Educação Ambiental (EA) com educadores/as e educandos/as da Rede Estadual de Santa Catarina. O objetivo geral é refletir em torno desta prática pedagógica desenvolvida durante a formação, estimulando a potência da vida e o reencontro com o cuidado, por meio da Permacultura e da Educação Biocêntrica, com a intenção de sugerir a construção de uma cultura sustentável. E especificamente refletir as práticas pedagógicas que vêm sendo desenvolvidas em torno do trabalho com as hortas escolares; proporcionar o reencontro com o cuidado, permeado pelo contato com a terra, com as pessoas e com o ambiente. Com este estudo compreendeu-se que a permacultura possibilitou aos participantes reverem o espaço escolar, as relações vivenciadas, bem como os métodos de cultivo de plantas e manejo do solo.
NATUREZA E REPRESENTAÇÕES QUE R-EXISTEM: CINCO SÉCULOS DE INVASÃO, APROPRIAÇÃO E VIOLÊNCIA NA AMAZÔNIA BRASILEIRA
Authors: Rodrigues de Andrade Francisca Marli
Published: August 2019

As tensões ideológicas forjadas pelo capital colocaram a Amazônia no centro das lutas simbólicas atuais. De um lado, a Medida Provisória 870 que, defendida pelo governo Bolsonaro, desarticula as principais pautas ambientais. Do outro, os saberes e as ancestralidades indígenas que tem r-existido aos cinco séculos de invasão, apropriação e violência em defesa da floresta. Com esses elementos, pensamos nesta pesquisa que tem como objetivo: identificar os saberes e as ancestralidades indígenas, nas representações sociais de Educação Ambiental de docentes na cidade de Castanhal – Pará. Participaram da pesquisa 121 docentes que, com formação em Pedagogia, responderam ao questionário, complementado por dois grupos de discussão e pela observação participante. Nos resultados mais significativos, destacamos que as estratégias sutis de dominação não conseguiram desenraizar, principalmente, as identidades que tem como base a defesa da natureza.
Reflexão e tomada de decisão acerca de questões ambientais: contribuições de um estudo baseado na formação cidadã
Authors: Vieira Maria Cecília Dos Santos , Martins Garcia Lenise Aparecida
Published: August 2019

A sociedade contemporânea exige que os indivíduos posicionem criticamente e tomem decisões diante de situações como o agravamento de problemas ambientais. Este artigo possui o objetivo de apresentar como o estudo de uma problemática local pode contribuir para o desenvolvimento da reflexão e/ou tomada de decisão acerca de questões ambientais. O estudo constituído por quatro etapas (reconhecimento, diagnóstico, elaboração de propostas e intervenções) envolveu a participação de 30 estudantes e a problemática se relacionou com uma unidade de conservação que se encontra degradada. Foram desenvolvidas intervenções como uma carta para o prefeito, uma ação comunitária, uma música, um glossário e uma página no facebook. As intervenções apresentaram contribuições significativas para a investigação, pois para executá-las foram necessários momentos de planejamento, divisão de grupos e principalmente reflexão e tomada de decisão.
Acute Myelogenous Leukemia as a Rare Cause of Duodenal Ulcers
Authors: Sobotka Lindsay A. , Crilley Tessa , Levine Edward , Afzali Anita
Published: August 2019

Acute myelogenous leukemia (AML) is the most prevalent acute leukemia and is defined by the presence of myeloid blasts in the blood or bone marrow. Rarely, AML can be present in the gastrointestinal tract. We present a patient with AML undergoing treatment with decitabine who presented with hematemesis. He underwent endoscopy which revealed two 5 mm duodenal ulcers that were biopsied, and pathology was consistent with AML. Endoscopy should be considered in patients with leukemia who present with nausea, vomiting, or signs of bleeding to evaluate for gastrointestinal involvement. Patients diagnosed with AML are treated with chemotherapy.
CONTRIBUIÇÃO DO SISTEMA AMBIENTAL URBANO AO ESTUDO DA DENGUE EM IRANDUBA
Authors: Almeida Rayane Brito de , Castro Marcela Beleza de
Published: August 2019

O presente texto objetivou identificar e analisar a formação de áreas vulneráveis ao risco de dengue produzido no espaço urbano de Iranduba a partir do Sistema Ambiental Urbano (SAU). As alterações na paisagem em decorrência da dinâmica espacial têm sido mais aceleradas, principalmente após a construção da ponte Rio Negro, impactando na valorização e desvalorização de solos urbanos, onde as enfermidades são identificadas, sobretudo nos moradores de baixa renda que moram, em sua grande parte, em áreas vulneráveis. Neste estudo foram realizados levantamentos bibliográficos, trabalho de campo e mapeamento das áreas. A problemática foi fundamentada no SAU, por se caracterizar pela abordagem sistêmica aos problemas socioambientais urbanos. Os resultados mostraram que as áreas vulneráveis ao risco de dengue são formadas em decorrência da constituição de moradias em áreas expostas as transformações ambientais, como a enchente; e em áreas com precariedades de estruturas urbanas, como a ineficácia e/ou ausência de saneamento básico (abastecimento de água, coleta de lixo, rede de esgoto) e serviços básicos como a saúde e educação ambiental, construindo particularidades de riscos e vulnerabilidades socioambientais à dengue no contexto urbano de Iranduba.
Improving falls in nursing homes: a post-fall huddle quality improvement project
Authors: Buckner Tekekee , Sherry Daisy
Published: August 2019

Falls are one of the most common preventable health problems in adults 65 years and older (AHRQ, 2013). A fall in this population can have a devastating effect often leading to a significant change in morbidity or death. Adults in assisting living, nursing homes, and skilled facilities (SNF) have an increased risk of falling and having a subsequent fall due to an acute illness, weakness, or confusion. This makes individualizing a plan of care to prevent a secondary fall and identifying the root cause of falls within a facility imperative.In our agency, the fall rate is nearly triple that of the national benchmark. To address this problem, a Post-Fall Huddle project was implemented. The literature recommends and supports the practice of a post-fall assessment program in fall reduction to identify intrinsic and extrinsic fall risk etiologies. There was found to be a reduction in the absolute values of recurrent patient falls per quarterly reporting after the implementation of the post-fall huddle. The results also provided pertinent data that can be used for recommendations in future fall prevention for the SNFÂ
Una experiencia de aprendizaje en formación continua de profesores de química fundamentada en naturaleza de la ciencia y tecnología
Authors: Siso Pavón Zenahir , Sánchez Soto Iván , Cuéllar Fernández Luigi
Published: August 2019

En este artículo se analiza una experiencia de aprendizaje de aspectos epistémicos a partir de actividades lúdicas de situaciones y escenarios, para promover procesos reflexivos en profesores de química respecto de la ciencia que enseñan, en torno a un itinerario de formación sobre visiones de naturaleza de la ciencia y tecnología. Las dos finalidades de la experiencia de aprendizaje fueron 1) reconocer la existencia de aspectos epistémicos y no epistémicos relacionados con la ciencia y la tecnología y 2) reflexionar acerca de la observación, interpretación, creatividad e imaginación como aspectos de NdCyT. La investigación fue de carácter cualitativa interpretativa, con apoyo del análisis temático y uso de NVivo 11, en el que se extraen las partes relevantes de los discursos orales y escritos de los profesores participantes en la producción de datos durante la sesión de trabajo, para agruparlos en temáticas de mayor inclusión. Los resultados muestran que la experiencia de aprendizaje promueve la reflexión no solo en relación con lo metateórico (aspectos epistémicos) tal y como fue intencionado, sino también en torno a dos bloques temáticos adicionales que resultaron centrales, como la enseñanza de la ciencia y valoración de la sesión de trabajo. Las temáticas menos inclusivas dan cuenta de que el profesor piensa desde su actuar en el aula, teniendo su conocimiento profesional como referente en los procesos de reflexión, de igual modo este tipo de experiencias representan una oportunidad para contrastar y cuestionar visiones instaladas socialmente sobre la ciencia que enseñan formas de dialogar y de compartir sus formas de pensar, lo cual incide en el modo como hablan y actúan en el aula a la vez que fortalecen su formación profesional.
Automedicação como tema de situação de estudo
Authors: Bomfim Roberta Conceição , Massena Elisa Prestes
Published: August 2019

A interdisciplinaridade e a contextualização dos conteúdos são sugeridas pela Situação de Estudo que busca a reconfiguração curricular. Este trabalho propõe uma Situação de Estudo cujo tema foi automedicação para ensinar centralmente conteúdos de Química, fruto de uma pesquisa cujo objetivo foi investigar os processos de ensino e aprendizagem possibilitados por meio desta estratégia. O trabalho foi constituído por atividades que foram divididas em quatro momentos e desenvolvidas em oito aulas em uma escola pública, localizada no interior da Bahia, Brasil. As produções dos estudantes foram analisadas pela Análise Textual Discursiva com a utilização de três categorias, sendo uma emergente e duas a priori. Neste trabalho, abordamos duas delas “Compreensões sobre solubilidade” e “Considerações sobre a Situação de Estudo”. Com os resultados, foi possível perceber que os estudantes demonstraram uma evolução conceitual, pois, no início das atividades, muitos traziam uma compreensão do senso comum acerca das questões que envolviam os medicamentos e, no decorrer das atividades desenvolvidas, foi possível observar que os estudantes construíram um novo sistema de conceitos.
Diseño de un instrumento para caracterizar el conocimiento didáctico del contenido en profesores de física sobre un tópico específico
Authors: Campos Nava Marcos , Ramírez Díaz Mario Humberto
Published: August 2019

En este artículo se reporta el proceso llevado a cabo para diseñar un instrumento con el objetivo de caracterizar el conocimiento didáctico del contenido en los profesores en el tópico específico de gráficas cinemáticas. Esta perspectiva ha sido investigada exhaustivamente en las últimas decadas y se consdiera como un elemento orientador en la elaboración de programas de formación y actualización de profesores de ciencias. Debido a la importancia que conlleva lo anterior para la didáctica de la física, resultan pertinentes elementos teóricos y metodológicos con el fin de caracterizar dicho constructo. Esta investigación trabaja por medio del diseño de un instrumento que pueda ser validado, ya que son escasos los instrumentos de esta naturaleza que se reportan en la literatura especializada, sobre todo en América Latina. El producto final se presenta como un cuestionario en escala Likert, el cual fue piloteado con un grupo de 42 profesores de física en servicio, lo que permitió medir la consistencia interna del mismo por medio del coeficiente alfa de Cronbach, calculado por medio del software de análisis estadísticos SPSS© versión 20. Los resultados indican un valor de consistencia interna aceptable, lo cual permite considerar factible el uso de dicho instrumento con fines exploratorios en investigaciones relacionadas con el conocimiento didáctico del contenido en profesores de física en el tópico de gráficas cinemáticas.
Analysis and evaluation of the risks of bird strikes in the international Guarulhos airport surroundings
Authors: Ribeiro José Carlos , Damião Devanildo
Published: August 2019

The first catastrophic avian impact victim killed Cal Rogers in 1912 in the United States. The most recent and catastrophic accident by bird striking occurred on August 11, 2016 with Airbus A320 aircraft apparently after striking at least one bird upon takeoff from New York's LaGuardia Airport. The aircraft landed safely on Hudson River. Fortunately everybody still alive, even though the loss of aircraft hull. The purpose of this study is to present the panorama of the bird strikes, to identify, evaluate the propensities and to present the propositions to mitigating the bird strike risks in the surroundings of the Guarulhos International Airport (SBGR). This study is based on probabilistic and heuristic methods to infer about the risk propensities of avian strikes. The study of bird strikes and risk management are essential to anticipate and minimize the severity and reduction of frequency of occurrences. The results of the statistical analyze point to the flight densities and the frequency of events due to the migratory periods of the neotropic and endemic birds. Native populations of birds travel between the Serra do Mar, the Mata Atlântica and forests around the airport to the Serra da Cantareira forest. Impact events are strongly correlated with the density of aircraft movements in the SBGR.
Certain fractional kinetic equations involving generalized K-functions
Authors: Agarwal Garima , Nisar Kottakkaran Sooppy
Published: August 2019

The main aim of this paper is to investigate the solution of generalized fractional kinetic equations involving the

{{}_{m}{R}_{n}}

function by using the Laplace transform.
Also, we use the differential property of

{{}_{m}{R}_{n}}

to solve kinetic equations.
The obtained results are expressed in terms of generalized K-functions.
The graphical interpretations of the solutions are also presented in this study.
Modified surgical technique in an unusual uterine rupture
Authors: Vujić Goran , Radošević Velena , Matak Luka , Mikuš Mislav , Orešković Slavko
Published: August 2019

Background

Uterine rupture is an extremely rare and unpredictable event for women undergoing trial of labor after cesarean delivery (TOLAC).

Case presentation

We present a patient with a lateral edge uterine rupture after TOLAC and our modified surgical technique for preventing complications of uterine atony.

Conclusion

Further case report studies are required in order to evaluate the effectiveness of our new-modified surgical technique in appropriate selected cases.
Analysis of occupational accidents in the construction industry with regards to selected time parameters
Authors: Szóstak Mariusz
Published: August 2019

The construction industry is characterized by a large variety and variability of implementation conditions. Construction works are carried out throughout the whole calendar year under varying atmospheric conditions, both during the day and also during the evening and night. Construction workers also often work overtime that exceeds the eight-hour working day. Work in such conditions creates a particularly high threat to the health and life of working people. In the issues of work safety the most important is worker, who in the accident process has a triple role: the decision maker, the perpetrator of an accident and the victim. The purpose of this article is to examine whether there is a dependence between the number of occupational accidents in the construction industry and time parameters such as: the time of an accident, the day of the week and the month in which an accident occurred. The article also attempts to determine the dependence between the age of the injured person, work experience and the number of hours worked by the injured person from the time of starting work to the moment of the accident.
Volume Optimization of Solid Waste Landfill Using Voronoi Diagram Geometry
Authors: Koźniewski Edwin , Orłowski Marcin
Published: August 2019

The loose material, falling freely on the flat area, creates a geometric object similar to the roof. This object, which is in fact an embankment, the authors described and examined in previous works. They stated that the top view of such an object is a flat diagram of Voronoi. In view of the need to enlarge the landfill by combining the existing disjoint embankments, the authors were encouraged to apply the results obtained in practice. They also provided a detailed methodology for creating such embankments. In particular, they used the standard version of AutoCAD software and built a 3D model of the landfill based on solid operations. This parametric approach to design enables the rapid determination of the volume and surface area and fits in the BIM technology of designing engineering objects.
The acute effects of decaffeinated versus caffeinated coffee on reaction time, mood and skeletal muscle strength
Authors: Sane Rohit M. , Jadhav Pradeep R. , Subhedar Sanjana N.
Published: August 2019

Background

Caffeinated coffee, a psycho-stimulant, is widely consumed throughout the globe. However, its chronic consumption has deleterious effects on human health. Meanwhile, decaffeinated coffee has low content of caffeine and thus can be an alternative to caffeinated coffee. Therefore, the study was undertaken to explore and compare the acute effects of decaffeinated and caffeinated coffee on reaction time, mood and skeletal muscle strength in healthy volunteers.

Methods

This was a prospective, interventional, comparative type of study. The study included 70 healthy adults divided into two groups (Caffeinated coffee group and Decaffeinated coffee group). The following parameters were assessed: reaction time was assessed by digital display multiple-choice apparatus, mood by Visual Analogue Scale (VAS) and Profile of Mood States revised version (POMS) and skeletal muscle strength by hand dynamometer. All parameters in both groups were assessed pre-intervention (baseline) and 30 min post-intervention.

Results

In both groups (decaffeinated and caffeinated coffee) post-intervention, there was a statistically significant (p < 0.05) improvement in the reaction time (VRT) and mood (VAS, POMS) from the baseline. However, both groups did not show any significant effects on the skeletal muscle strength. Upon comparing the two groups, we found that caffeinated coffee showed higher and significant improvement of mood than decaffeinated coffee.

Conclusions

Decaffeinated coffee exerts an acute significant stimulatory effect on the reaction time and mood. However, these effects in comparison to caffeinated coffee are low. Further randomized control clinical trials are thus needed to validate these interesting findings.
IoT-Based Health Monitoring System Using BeagleBone Black with Optical Sensor
Authors: Saranya K. Durga , Krishnamurthy R. , Srinivas K. N. H. , Sarveswara Rao T. D. N. S. S. , Amiri I. S.
Published: August 2019

There is an increase in the number of chronic and heart diseases due to work culture etc. The current hospital-centric system is becoming inefficient to treat patients that demand immediate attention and this can efficiently be implemented by using the Internet of Things (IoT) technology. The aim of this paper is to implement IoT-based health monitoring system which measures temperature, blood pressure, and heartbeat of a patient located remotely and send the data to the doctor for analyzing the condition of the patient. And also an optical light sensor is used to check the light condition in the patient room and based on the sensor value the light will be controlled (ON/OFF). The system is implemented using a BeagleBone Black (BBB) development board. This model saves the work time of the doctors to check the patient’s condition. By using the Global System for Mobile communication (GSM), the patient’s data is sent to the cloud through which the doctor can monitor the parameters anywhere in the world using the mobile application or web page.
Polish, Silesian and Local Cloth Seals from Excavations in Gdańsk, Poland
Authors: Połczyński Łukasz , Przymorska-Sztuczka Magdalena
Published: August 2019

This article presents a collection of early modern cloth seals revealed during an excavation in Gdańsk (Poland). Our aim is to present a collection of an often-neglected category of artefacts. These are cloth seals from towns and villages located along the Polish-Lithuanian Commonwealth and Habsburg Monarchy border. Tracking the import of cloth to Gdańsk (the most important commercial centre on the Baltic Sea at that time) based on the analysis of the origin of textile seals is crucial as it allows us, in some sense, to reconstruct the cloth market of mid-seventeenth century Gdańsk.
Synthesis, electrical properties, and kinetic thermal analysis of polyaniline/ polyvinyl alcohol - magnetite nanocomposites film
Authors: AlFannakh Huda , Arafat S. S. , Ibrahim S. S.
Published: August 2019

Polyaniline-poly vinyl alcohol (PANI-PVA) conducting blends containing 15 wt% aniline were synthesized by in situ polymerization of aniline. Three-phase polymer blended nanocomposites with different contents of magnetite (5, 10 and 15 wt.%) were also synthesized. We measured the current-voltage (I-V) curves for the conducting blend and its magnetite nanocomposite. We also measured their thermal stability, and performed kinetic analysis through thermogravimetric analysis. We observed that the three phase nanocomposites showed enhanced electrical conductivity compared with that of the conductive blend, and no electrical hysteresis. The PVA/PANi blend was more stable above 350∘C and the addition of Fe3O4 enhanced the thermal stability of the conductive blend. The apparent activation energy of the three phase nanocomposites was greater than those of both the pure PVA and PVA/PANi samples. These results suggest that such three phase nanocomposites could be used in a range of applications.
The value of negative stress echocardiography in predicting cardiovascular events among adults with no known coronary disease
Authors: Samiei Niloufar , Parsaee Mozhgan , Pourafkari Leili , Tajlil Arezou , Pasbani Yeganeh , Rafati Ali , Nader Nader D
Published: August 2019

Introduction: Stress echocardiography is a safe and cost-effective method of evaluating the patients with suspected coronary artery disease (CAD). However, the risk factors of an adverse cardiovascular event after a normal exercise (ESE) or dobutamine (DSE) stress echocardiography are not well established. Methods: A cohort of 705 patients without previous history of CAD and a negative ESE/DSE was studied. All studies were performed in a high-volume echocardiologic laboratory and interpreted by two experienced echocardiography-trained cardiologists. Patients with inconclusive studies and those with an evidence of myocardial ischemia were excluded. Demographic, echocardiographic and hemodynamic findings were recorded. Patients were followed for at least 2 years. Independent predictors of major adverse cardiovascular events (MACE) were determined by regression analysis. Results: During a period of 55.7±17.5 months, MACE occurred in 35 (5.0%) of patients. Negative predictive value (NPV) of DSE was 89.2%, which was significantly less than 96.5% for ESE in predicting the occurrence of MACE (P = 0.001). MACE occurred more frequently among older (≥65 years) men with preexisting diabetes, hypertension, and/or hyperlipidemia. During ESE, a higher maximum blood pressure*heart rate product for the achieved level of metabolic equivalent (METS) of tasks was also an independent predictor of MACE. Conclusion: Inability of patients to undergo traditional ESE that led to the choice of using DSE alternative reduces the NPV of the stress echocardiography among patients without previous history of CAD. A modest rise of heart rate and blood pressure in response to increased level of activity serves as favorable prognostic value and improves the NPV of stress echocardiography.
Role of perceived heart risk factors by outpatient population in predicting cardiovascular risk
Authors: Soroush Ali , Shams-Alizadeh Nasim , Vahdat Afsoon , Mohebi Zeinab , Saeidi Mozhgan , Komasi Saeid
Published: August 2019

Introduction: Regarding the expanding population in developing countries who are at risk for cardiovascular diseases (CVDs), identification and management of effective factors are important in reducing the risk of CVDs. So, the present study aimed to assess the role of perceived heart risk factors (PHRFs) in the prediction of cardiovascular risk among outpatient patients. Methods: The samples of this cross-sectional study included 150 outpatient patients who attend the clinic of Imam Reza hospital during October-December 2016. The participants were completed the Perceived Heart Risk Factors Scale (PHRFS) and Cardiovascular Risk Assessment Questionnaire (CRAQ). Data analyzed through Pearson correlation and multiple regression analyses. Results: Based on the findings, 28%, 40%, 22.7%, and 9.3% of patients were low, medium, high, and severely high-risk, respectively. The strongest predictors of the cardiovascular risk were physiological (β = -0.273; P = 0.004), psychological (β=0.236; P = 0.020), and biological risk factors (β=0.209; P = 0.016), respectively. In addition, the strongest predictor of the lifestyle risk was physiological risk factors (β = -0.264; P = 0.007). Other variables do not play a significant role in predict the lifestyle risk (P > 0.05). Our model was able to explain 9.2% of cardiovascular risk variance and 5.7% of cardiovascular risk caused by lifestyle variance. Conclusion: The higher patients’ perception about biological and psychological risk factors is concerned as an alarm for increased cardiovascular risk while higher perception about physiological risk factors is associated with reduced cardiovascular risk caused by lifestyle and total cardiovascular risk. The programs reducing cardiovascular risk should target the high-risk groups to save cost and time.
Dinner consumption and cardiovascular disease risk factors among a nationally representative sample of Iranian adolescents: the CASPIAN-III Study
Authors: Azadbakht Leila , Akbari Fahime , Qorbani Mostafa , Esmaeil Motlagh Mohammad , Ardalan Gelayol , Heshmat Ramin , Daneshzad Elnaz , Kelishadi Roya
Published: August 2019

Introduction: This cross-sectional study aimed to assess the association between cardiovascular disease (CVD) risk factors and dinner consumption in a nationally representative sample of Iranian adolescents. Methods: The present study was conducted on 5642 adolescents aged 10-18 years old in 27 provinces in Iran. The subjects were included applying by multistage random cluster sampling. Participants who ate ≥5 dinners during a week were considered as a dinner consumer. Results: Among 5642 subjects, 1412 (25%) did not consume dinner. Dinner consumers were less likely to be overweight or obese (P < 0.001) and abdominally obese (P < 0.001) as well as to have an abnormal level of HDL-C (P = 0.02). Dinner skipper youths had a higher risk for overweight or obesity (odds ratio [OR]: 1.62; 95% CI: 1.39-1.89) and abdominal obesity (OR: 1.59; 95% CI: 1.36-1.85) which remained significant after adjusting confounding factors (P <0001). No relationship was observed between dinner consumption and the rest of the CVD risk factors, neither in crude nor in adjusted models. A higher proportion of dinner-consumer adolescents had no CVD risk factors in comparison to dinner-skipper subjects (31.1% vs. 28%). Conclusion: Eating dinner might be inversely associated with some CVD risk factors among Iranian adolescents. Further prospective studies will need to prove this theory.