bluuebunny/crossref_metadata_2025 huggingface dataset:
The challenges of undocumented migrant childhood
Authors: Albański Łukasz
Published: March 2020

This article examines the concept of undocumented childhood. Undocumented children have to navigate between protected (as minors) and unprotected (as young adults) contexts. Therefore, they live not only in a relatively difficult situation as children staying in another country, but also face other risks due to their uncertain futures. Their situation calls for a re-examination of the frame that has been triggered to incorporate them. In particular, one may ask: what does it mean to provide children with rights and protections that ultimately expire. Thus, the article aims to bring the discussion about children as a minority groupback. It helps to assure that migrant children will be considered as children first, and not as foreigners.
Aktywność w czasie wolnym młodzieży studiującej
Authors: Słupska Kamila
Published: March 2020

The article refers to students’ free time. It includes: theoretical explanations concerning the essence and meaning of the main above-mentioned category, review of the outcomes of a research conducted on free time activities of the studying youth, and – as an illustration to these considerations – a report from a personal research. As a part of it, the respondents referred to, among others, the significance of free time in life, its functions, ways of making use of it (actual ones and the ones longed for), and factors contributing to it.
Symposium on Recent Developments in the Evaluation of Natural Rubber
Authors: Collier Simon
Published: March 2020

Description

The papers in this book were presented at a symposium held at the 50th anniversary meeting of ASTM International Committee D11 on Rubber.

There may be a number of people who will read the papers of this collection whose experience has been chiefly with synthetic rubber and who therefore are not familiar with the methods used for evaluating or grading crude natural rubber. The introduction paper presents a brief historical sketch of the earlier attempts to introduce a new system for evaluating crude natural rubber on the basis of scientific tests performed in the laboratory. Other papers were prepared on specific topics.
Vulcanization Characteristics of Natural Rubber
Authors: Stiehler Robert D. , Roth Frank L.
Published: March 2020

The present classification program for natural rubbers has been handicapped by the lack of adequate means to characterize their behavior on vulcanization. Several methods have recently been proposed for this purpose. Roth and Stiehler (9)2 in 1948 described the strain test from which three vulcanization parameters can be calculated. Two of these parameters have been combined by Schade (10). Thirion (12) in 1951 proposed a method for calculating two parameters from the customary measurements of stress at 600 per cent elongation. Gee and Morrell (5) have recently suggested a procedure for determining two parameters from measurements of Mooney viscosity and stress at 100 per cent elongation. Workers at The B. F. Goodrich Co. (8) have proposed the use of the Mooney viscometer for determining two parameters.
Differential Effects of Nasal Inflammation and Odor Deprivation on Layer-Specific Degeneration of the Mouse Olfactory Bulb
Authors: Hasegawa-Ishii Sanae , Imamura Fumiaki , Nagayama Shin , Murata Makiko , Shimada Atsuyoshi
Published: March 2020

Harmful environmental agents cause nasal inflammation, and chronic nasal inflammation induces a loss of olfactory sensory neurons (OSNs) and reversible atrophy of the olfactory bulb (OB). Here, we investigated the mechanisms underlying this inflammation-induced OB atrophy by histologically and biochemically comparing the OB changes in mouse models of nasal inflammation and odor deprivation. In addition, we examined whether odor stimulation is necessary for OB recovery from atrophy. One group of adult male C57BL/6 mice was administered lipopolysaccharide (LPS) unilaterally for 10 weeks to induce nasal inflammation (control animals received saline), and a second group received unilateral naris closures (NCs) for 10 weeks of odor deprivation. The OBs atrophied in both models, but odor deprivation shrank the glomerular, external plexiform, mitral, and granule cell layers (GCLs), whereas the olfactory nerve, glomerular, and external plexiform layers (EPLs) atrophied as a result of nasal inflammation. Additionally, nasal inflammation, but not odor deprivation, caused neuroinflammation in the OB, inducing glial activation and elevated expression of interleukin-1β (IL-1β) and TNFα. After 10 weeks of nasal inflammation, mice were housed for another 10 weeks with no additional treatment or with unilateral NC. Nasal inflammation and glial activation subsided in both groups, but glomerular and EPLs recovered only in those with no additional treatment. Our findings demonstrate that nasal inflammation and odor deprivation differentially induce layer-specific degeneration in the OB, that loss of OSN activity rather than neuroinflammation is a major cause of inflammation-induced OB atrophy, and that odor stimulation is required for OB recovery from atrophy.
Cellular Basis of Bitter-Driven Aversive Behaviors inDrosophilaLarva
Authors: Choi Jaekyun , Yu Seungyun , Choi Min Sung , Jang Sooin , Han I Joon , Maier G. Larisa , Sprecher Simon G. , Kwon Jae Young
Published: March 2020

Feeding, a critical behavior for survival, consists of a complex series of behavioral steps. InDrosophilalarvae, the initial steps of feeding are food choice, during which the quality of a potential food source is judged, and ingestion, during which the selected food source is ingested into the digestive tract. It remains unclear whether these steps employ different mechanisms of neural perception. Here, we provide insight into the two initial steps of feeding inDrosophilalarva. We find that substrate choice and ingestion are determined by independent circuits at the cellular level. First, we took 22 candidate bitter compounds and examined their influence on choice preference and ingestion behavior. Interestingly, certain bitter tastants caused different responses in choice and ingestion, suggesting distinct mechanisms of perception. We further provide evidence that certain gustatory receptor neurons (GRNs) in the external terminal organ (TO) are involved in determining choice preference, and a pair of larval pharyngeal GRNs is involved in mediating both avoidance and suppression of ingestion. Our results show that feeding behavior is coordinated by a multistep regulatory process employing relatively independent neural elements. These findings are consistent with a model in which distinct sensory pathways act as modulatory circuits controlling distinct subprograms during feeding.
Study on Thickness of Low Carbon Steel in Rapid Cooling Process: A Short Review
Authors: Abdullah Siti Noradila , Sazali Norazlianie , Jamaludin Ahmad Shahir
Published: March 2020

For any process that engaged with changes of chemical properties and physical is a heat treatment process by cooling or heating a metal. The technique for heat treatment includes, case hardening, annealing, tempering and precipitation strengthening, quenching and tempering. The mechanical properties like hardness, toughness and ductility can be altered by intense heat treating on steel to produce different mechanical properties. This matters with the carbon content in low carbon steel such as mild steel with above 0.4% carbon, in Medium carbon steel with above 0.8% carbon, and in High Carbon Steel with up to 2% carbon content in steels. To change the characteristics of metals and alloys is by heat treatment process where by altering the diffusion and cooling rate within its microstructure to make them suitable for any kind of usage by changing the grain size at different phases and changing the molecular arrangement.
In-situ worn geometry effect over the surface roughness propagation during micro milling process
Authors: Mohadzir Nurul Farhana , Rosli Ainur Munira , Jamaludin Ahmad Shahir , Md Razali Mohd Nizar
Published: March 2020

High-precision miniaturized components for micro-machining operations has an increasingly demand for numerous developing sectors such as medical instrumentations, electronics components, computer manufacturing, aerospace and automotive engineering. Micro-milling has known as a flexible micro machining process and the most familiar micro mechanical machining method. Due to overcome a few difficulties in micro fabrication, micro milling is picked as an alternative way as it has potential and imperative for high accuracy machining. However, micro tools have low tool life as it is unpredictably and wear quickly. Furthermore, it also has tendency to break easily due to its micro size dimension. The study observe the behaviour of micro milling worn geometry during machining and includes a non-conventional method to measure surface roughness resulted by micro milling process in machining of mild steel AISI1045. The workpiece is prepared by using CNC milling machine with facing and slotting process. Then, the mild steel AISI1045 will undergo a machining process by a 1 mm size end mill diameter with different set of parameters which are spindle speed, feed rate, radial depth and axial depth. Lastly, for the results, the surface roughness of the machined surface will be observed and the condition of tool and the measurement of wear for the tool will be investigated.
Effect of ball burnishing medium on the surface characteristics of free machining brass
Authors: Kumara Pavana , Vijendra Bhat V. , Purohit G. K.
Published: March 2020

Burnishing is becoming a promising surface finishing process to enhance materials surface properties.  The control of the various process parameters yields the desired surface characteristics in brass materials. In the current work, free machining brass specimens were burnished by Abrasive Assisted Burnishing(AAB) process and Plain Burnishing (PB) process using ball burnishing tool.  Response Surface Methodology was used to design the experiments in which Burnishing Force, Speed, Feed and Number of Passes were chosen as the process parameters. The minimum surface roughness achieved by PB and AAB was 0.1451 µm and 0.1041 µm respectively. The maximum surface hardness achieved using PB and AAB on the brass specimen was 207 HV and 248 HV respectively. The ball burnishing of free machining brass by AAB resulted in better surface characteristics as compared to the PB process.
Dissecting Adaptive Traits with Nested Association Mapping: Genetic Architecture of Inflorescence Morphology in Sorghum
Authors: Olatoye Marcus O , Marla Sandeep R , Hu Zhenbin , Bouchet Sophie , Perumal Ramasamy , Morris Geoffrey P
Published: March 2020

In the cereal crop sorghum (Sorghum bicolor) inflorescence morphology variation underlies yield variation and confers adaptation across precipitation gradients, but its genetic basis is poorly understood. We characterized the genetic architecture of sorghum inflorescence morphology using a global nested association mapping (NAM) population (2200 recombinant inbred lines) and 198,000 phenotypic observations from multi-environment trials for four inflorescence morphology traits (upper branch length, lower branch length, rachis length, and rachis diameter). Trait correlations suggest that lower and upper branch length are under somewhat independent control, while lower branch length and rachis diameter are highly pleiotropic. Joint linkage and genome-wide association mapping revealed an oligogenic architecture with 1–22 QTL per trait, each explaining 0.1–5.0% of variation across the entire NAM population. There is a significant enrichment (2.twofold) of QTL colocalizing with grass inflorescence gene homologs, notably with orthologs of maize Ramosa2 and rice Aberrant Panicle Organization1 and TAWAWA1. Still, many QTL do not colocalize with inflorescence gene homologs. In global georeferenced germplasm, allelic variation at the major inflorescence QTL is geographically patterned but only weakly associated with the gradient of annual precipitation. Comparison of NAM with diversity panel association suggests that naive association models may capture some true associations not identified by mixed linear models. Overall, the findings suggest that global inflorescence diversity in sorghum is largely controlled by oligogenic, epistatic, and pleiotropic variation in ancestral regulatory networks. The findings also provide a basis for genomics-enabled breeding of locally-adapted inflorescence morphology.
Comparative Cytology of Female Meiosis I AmongDrosophilaSpecies
Authors: Majekodunmi Ahmed , Bowen Amelia O , Gilliland William D
Published: March 2020

The physical connections established by recombination are normally sufficient to ensure proper chromosome segregation during female Meiosis I. However, nonexchange chromosomes (such as the Muller F element or “dot” chromosome in D. melanogaster) can still segregate accurately because they remain connected by heterochromatic tethers. A recent study examined female meiosis in the closely related species D. melanogaster and D. simulans, and found a nearly twofold difference in the mean distance the obligately nonexchange dot chromosomes were separated during Prometaphase. That study proposed two speculative hypotheses for this difference, the first being the amount of heterochromatin in each species, and the second being the species’ differing tolerance for common inversions in natural populations. We tested these hypotheses by examining female meiosis in 12 additional Drosophila species. While neither hypothesis had significant support, we did see 10-fold variation in dot chromosome sizes, and fivefold variation in the frequency of chromosomes out on the spindle, which were both significantly correlated with chromosome separation distances. In addition to demonstrating that heterochromatin abundance changes chromosome behavior, this implies that the duration of Prometaphase chromosome movements must be proportional to the size of the F element in these species. Additionally, we examined D. willistoni, a species that lacks a free dot chromosome. We observed that chromosomes still moved out on the meiotic spindle, and the F element was always positioned closest to the spindle poles. This result is consistent with models where one role of the dot chromosomes is to help organize the meiotic spindle.
El principio de soberanía permanente de los pueblos indígenas sobre los recursos en sus territorios
Authors: León Moreta María Augusta
Published: March 2020

The need for States to access natural resources in indigenous territories has led to confrontations between different rights and principles established in Public International Law. The purpose of the present article is to analyze the conflicts between the principle of permanent sovereignty over natural resources and the right of indigenous peoples to self-determination.  On the one hand, the principle of permanent sovereignty over natural resources is a means to guarantee a State’s access to resources to drive their development model.  On the other hand, the right to self-determination allows indigenous peoples to access the resources necessary for their economic, social and cultural development.  The implementation of extractive projects in indigenous territories has resulted in the deprivation of their territory as well as the limitation of access to resources, including those indispensable for subsistence.  This has significantly undermined their right to freely determine their own development model, and even to warrant their survival as indigenous peoples.  Given this reality, the article raises the idea of ​​an inclusive and not only exclusive sovereignty of the State, through which indigenous peoples may secure and protect their access to the necessary resources for their development.
Infancia, derechos humanos y ciudadanía
Authors: Díaz Arce Sergio Ruiz
Published: March 2020

Although the legal scenario for children after the advent of the International Convention on the Rights of the Child has generated an impact on national laws, the exercise of these rights by their holders continues to present some restrictions.  In this sense, the present article aims to perform an analysis on the paradigm shift in childhood as associated to the notion of citizenship, which is understood as a process of affirmation and conquest of rights.  Thence, the analysis initiates from an old conception of protection that considered the minor as an incapable and incomplete being, in contrast to a new protection paradigm, resulting from new laws for children and their condition as holders of rights.  In this context, childhood citizenship is understood as opposed to the idea of ​​ “future citizens”, based on the rights that were acquired, including the right to participate and be social actors, in accordance with the development of progressive autonomy.  Therefore, it is considered necessary to affirm the citizenship of children through the principle of progressive autonomy in order to achieve equal rights among people and build more democratic societies.
Table of Contents
Authors: - -
Published: March 2020

Table of Contents, Comm. Phys. Vol. 30, No. 1 (2020)
Improving bottleneck features for Vietnamese large vocabulary continuous speech recognition system using deep neural networks
Authors: Nguyen Bao Quoc , Vu Thang Tat , Luong Mai Chi
Published: March 2020

In this paper, the pre-training method based on denoising auto-encoder is investigated and proved to be good models for initializing bottleneck networks of Vietnamese speech recognition system that result in better recognition performance compared to base bottleneck features reported previously. The experiments are carried out on the dataset containing speeches on Voice of Vietnam channel (VOV). The results show that the DBNF extraction for Vietnamese recognition decreases relative word error rate by 14 % and 39 % compared to the base bottleneck features and MFCC baseline, respectively.
Identifying undamaged-beam status based on singular spectrum analysis and wavelet neural networks
Authors: Nguyen Dung Sy , Nguyen Hung Quoc , Ngo Nhi Kieu
Published: March 2020

In this paper, the identifying undamaged-beam status  based on singular spectrum analysis (SSA) and wavelet neural networks (WNN)  is presented. First, a database is built from measured sets and SSA which  works as a frequency-based filter. A WNN model is then designed which consists of the wavelet frame building, wavelet structure designing and  establishing a solution for training the WNN. Surveys via an experimental  apparatus for estimating the method are carried out. In this work, a  beam-typed iron frame, Micro-Electro-Mechanical (MEM) sensors and a  vibration-signal processing and measuring system named LAM_BRIDGE are all  used.
The preservation of good cryptographyic properties of MDS matrix under direct exponent transformation
Authors: Luong Tran Thi , Cuong Nguyen Ngoc , Dung Luong The
Published: March 2020

Maximum Distance Separable (MDS) code has been studied for a long time in the coding theory and has been applied widely in cryptography. The methods for transforming an MDS into other ones have been proposed by many authors in the literature. These methods are called MDS matrix transformations in order to generate different MDS matrices (dynamic MDS matrices) from an existing one. In this paper, some new results on the preservation of many good cryptographic properties of MDS matrices under direct exponent transformation are presented. These good cryptographic properties include MDS, involutory, symmetric, recursive (exponent of a companion matrix), the number of 1's and distinct elements in a matrix, circulant and circulant-like. In addition, these results are shown to have important applications in constructing dynamic diffusion layers for block ciphers. The strength of the ciphers against developing cryptanalytic techniques can be enhanced by the dynamic MDS diffusion layers.
Dynamic semi-supervised fuzzy clustering for dental X-ray image segmentation: an analysis on the additional function
Authors: Tuan Tran Manh , Son Le Hoang , Dung Le Ba
Published: March 2020

Dental X-ray image segmentation is a necessary and important process in medical diagnosis, which assists clinicians to make decisions about possible dental diseases of a patient from a dental X-ray image. It is a multi-objective optimization problem which involves basic components of fuzzy clustering, spatial structures of a dental image, and additional information of experts expressed through a pre-defined membership matrix. In our previous work, the authors presented a semi-supervised fuzzy clustering algorithm using interactive fuzzy satisficing named as SSFC-FS for this problem. An important issue of SSFC-FS is that the pre-defined membership matrix is a fixed function in the sense that it uses the same structure and parameters for all dental images. This is a shortcoming of SSFC-FS since each image has its own structure and morphology so that it needs different membership matrices. In this paper, the authors propose another new dynamic semi-supervised fuzzy clustering called SSFC-FSAI that extends SSFC-FS by employing a collection of pre-defined membership matrices for dental images. A procedure to choose a suitable pre-defined membership matrix for a given dental X-ray image is proposed and attached to SSFC-FSAI. Experimental results on a real dataset of 56 dental X-ray images from Hanoi University of Medical in 2014 - 2015 show that SSFC-FSAI has better accuracy than SSFC-FS and the relevant algorithms.
Table of Contents
Authors: - -
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Symbolic Computational Models for Intuitionistic Linguistic Information
Authors: Phong Phạm Hồng , Cường Bùi Công
Published: March 2020

In \cite{Cuong14, Phong14}, we first introduced the notion of intuitionistic linguistic labels. In this paper, we develop two symbolic computational models for intuitionistic linguistic labels (intuitionistic linguistic information). Various operators are proposed, their properties are also examined. Then, an application in group decision making using intuitionistic linguistic preference relations is discussed.
Approximation Schemes for Two Non-Linear Knapsack Problems and Their Applications in Alternating Current Electric Systems
Authors: Nguyen Thanh
Published: March 2020

The purpose of this paper is to study the approximability of two non-linear Knapsack problems, which are motivated by important applications in alternating current electrical systems. The first problem is to maximize a nonnegative linear objective function subject to a quadratic constraint, whilst the second problem is a dual version of the first one, where an objective function is minimized. Both problems are $\np$-hard since they generalize the unbounded Knapsack problem, and it is unlikely to obtain polynomial-time algorithms for them, unless $\p=\np$. It is therefore of great interest to know whether or not there exist efficient approximation algorithms which can return an approximate solution in polynomial time with a reasonable approximation factor. Our contribution of this paper is to present polynomial-time approximation schemes (PTASs) and this is the best possible result one can hope for the studied problems. Our technique is based on the linear-programming approach which seems to be more simple and efficient than the previous one.
Pythagorean Picture Fuzzy Sets, Part 1- basic notions
Authors: Cuong Bui Cong
Published: March 2020

Picture fuzzy set (2013) is a generalization of the Zadeh‟ fuzzy set (1965) and the Antanassov‟intuitionistic fuzzy set. The new concept could be useful for many computational intelligentproblems. Basic operators of the picture fuzzy logic were studied by Cuong, Ngan [10,11 ].Newconcept –Pythagorean picture fuzzy set ( PPFS) is a combination of Picture fuzzy set with theYager‟s Pythagorean fuzzy set [12-14].First, in the Part 1 of this paper, we consider basic notionson PPFS as set operators of PPFS‟s , Pythagorean picture relation, Pythagorean picture fuzzy softset. Next, the Part 2 of the paper is devoted to main operators in fuzzy logic on PPFS: picturenegation operator, picture t-norm, picture t-conorm, picture implication operators on PPFS.As aresult we will have a new branch of the picture fuzzy set theory.
EXTENDING RELATIONAL DATABASE MODEL FOR UNCERTAIN INFORMATION
Authors: Nguyễn Hòa
Published: March 2020

In this paper, we propose a new probabilistic relational database model, denote by PRDB, as an extension of the classical relational database model where the uncertainty of relational attribute values and tuples are respectively represented by finite sets and probability intervals. A probabilistic interpretation of binary relations on finite sets is proposed for the computation of their probability measures. The combination strategies on probability intervals are employed to combine attribute values and compute uncertain membership degrees of tuples in a relation. The fundamental concepts of the classical relational database model are extended and generalized for PRDB. Then, the probabilistic relational algebraic operations are formally defined accordingly in PRDB. In addition, a set of the properties of the algebraic operations in this new model also are formulated and proven.
A HEDGE ALGEBRAS BASED CLASSIFICATION REASONING METHOD WITH MULTI-GRANULARITY FUZZY PARTITIONING
Authors: Phong Phạm Đình , Du Nguyen Duc , Thuy Nguyen Thanh , Thong Hoang Van
Published: March 2020

During last years, lots of the fuzzy rule based classifier (FRBC) design methods have been proposed to improve the classification accuracy and the interpretability of the proposed classification models. Most of them are based on the fuzzy set theory approach in such a way that the fuzzy classification rules are generated from the grid partitions combined with the pre-designed fuzzy partitions using fuzzy sets. Some mechanisms are studied to automatically generate fuzzy partitions from data such as discretization, granular computing, etc. Even those, linguistic terms are intuitively assigned to fuzzy sets because there is no formalisms to link inherent semantics of linguistic terms to fuzzy sets. In view of that trend, genetic design methods of linguistic terms along with their (triangular and trapezoidal) fuzzy sets based semantics for FRBCs, using hedge algebras as the mathematical formalism, have been proposed. Those hedge algebras-based design methods utilize semantically quantifying mapping values of linguistic terms to generate their fuzzy sets based semantics so as to make use of fuzzy sets based-classification reasoning methods proposed in design methods based on fuzzy set theoretic approach for data classification. If there exists a classification reasoning method which bases merely on semantic parameters of hedge algebras, fuzzy sets-based semantics of the linguistic terms in fuzzy classification rule bases can be replaced by semantics - based hedge algebras. This paper presents a FRBC design method based on hedge algebras approach by introducing a hedge algebra- based classification reasoning method with multi-granularity fuzzy partitioning for data classification so that the semantic of linguistic terms in rule bases can be hedge algebras-based semantics. Experimental results over 17 real world datasets are compared to existing methods based on hedge algebras and the state-of-the-art fuzzy sets theoretic-based approaches, showing that the proposed FRBC in this paper is an effective classifier and produces good results.
Conducting a high-stakes OSCE in a COVID-19 environment
Authors: Boursicot Katharine , Kemp Sandra , Ong Thun How , Wijaya Limin , Goh Sok Hong , Freeman Kirsty , Curran Ian
Published: March 2020

This article was migrated. The article was marked as recommended. The COVID-19 pandemic has presented significant challenges for medical schools. It is critical to ensure final year medical school students are not delayed in their entry to the clinical workforce in times of healthcare crisis. However, proceeding with assessment to determine competency for graduation from medical school, and maintaining performance standards for graduating doctors is an unprecedented challenge under pandemic conditions. This challenge is hitherto uncharted territory for medical schools and there is scant guidance for medical educators. In early March 2020, Duke-National University Singapore Medical School embraced the challenge for ensuring competent final year medical students could complete their final year of studies and graduate on time, to enter the medical workforce in Singapore without delay. This paper provides details of how the final year clinical performance examinations were planned and conducted during the COVID-19 pandemic. The aim of the paper is to provide guidance to other medical schools in similar circumstances who need to plan and make suitable adjustments to clinical skills examinations under current pandemic conditions. The paper illustrates how it is possible to design and implement clinical skills examinations (OSCEs) to ensure the validity and reliability of high-stakes performance assessments whilst protecting the safety of all participants, minimising risk and maintaining defensibility to key stakeholders.
Description of blackberry fruit growth by nonlinear regression models
Authors: Silva Édipo Menezes da , Tadeu Maraísa Hellen , Silva Victor Ferreira da , Pio Rafael , Fernandes Tales Jesus , Muniz Joel Augusto
Published: March 2020

Abstract Blackberry is a small fruit with several properties beneficial to human health and its cultivation is an alternative for small producers due to its fast and high financial return. Studying the growth of fruits over time is extremely important to understand their development, helping in the most appropriate crop management, avoiding post-harvest losses, which is one of the aggravating factors of blackberry cultivation, being a short shelf life fruit. Thus, growth curves are highlighted in this type of study and modeling through statistical models helps understanding how such growth occurs. Data from this study were obtained from an experiment conducted at the Federal University of Lavras in 2015. The aim of this study was to adjust nonlinear, double Logistic and double Gompertz models to describe the diameter growth of four blackberry cultivars (‘Brazos’, ‘Choctaw’, ‘Guarani’ and ‘Tupy’). Estimations of parameters were obtained using the least squares method and the Gauss-Newton algorithm, with the “nls” and “glns” functions of the R statistical software. The comparison of adjustments was made by the Akaike information criterion (AICc), residual standard deviation (RSD) and adjusted determination coefficient (R2 aj). The models satisfactorily described data, choosing the Logistic double model for ‘Brazos’ and ‘Guarani’ cultivars and the double Gompertz model for ‘Tupy’ and ‘Choctaw’ cultivars.
O simulacro da Rainha: performance, ritual e corpo no Reisado Santa Helena
Authors: Oliveira Junior Ribamar José de , Fortes Lore
Published: March 2020

Resumo Este artigo apresenta uma reflexão antropológica para a performance de Francisca da Silva, mais conhecida como Tica, brincante da tradição cultural do Reisado no figural de Rainha no grupo Santa Helena em Juazeiro do Norte, interior do Ceará. O interesse consiste em perceber a forma com que Tica produz a dissidência sexual e de gênero por meio do uso do corpo na repetição da performatividade feminina, sobretudo na forma de inventar a existência social a partir dos eixos de precariedade e de vulnerabilidade. Ao trazer a manifestação popular religiosa do Reisado, procuramos perceber como a noção de teatro como encantamento aparece no momento em que Tica incorpora a Rainha no rito, principalmente do ponto de vista da majestade no corpo da brincante que dignifica a vida comum a partir da expansão criativa e política da dança no contexto subversivo da imitação.
Imitar y fabricar. Las naturalezaculturas de las agriculturas guaraní, colona y agroecológica
Authors: Schiavoni Gabriela
Published: March 2020

Resumen Considerando la imitación y la fabricación como procedimientos de vinculación con la naturaleza, nuestro artículo describe las prácticas agrícolas de las poblaciones locales y de los agricultores inmigrantes, en la provincia de Misiones (Argentina). El énfasis en los procedimientos permite establecer continuidades, y también fricciones, entre grupos juzgados como antagónicos. Descalificadas por el racionalismo, la imitación y la mímesis son valoradas aquí en términos de un enfoque materialista de la significación que discute la primacía otorgada a las representaciones simbólicas.
Effect of the addition of metakaolin on the carbonation of Portland cement concretes
Authors: SANTOS B. S. , ALBUQUERQUE D. D. M. , RIBEIRO D.V.
Published: March 2020

Abstract Carbonation has been a concern of constructors and researchers because, by lowering the pH of the interstitial solution of the concrete, it can favor the post-deposition and subsequent corrosion of reinforced concrete reinforcement. Among the factors that influence carbonation is the use of pozzolanic materials, such as metakaolin. However, there is no consensus as to the positive or negative contribution of these additions. This work evaluated the influence of metakaolin on the mechanical properties, porosity and in particular on the carbonation of concrete, from the addition of 0%, 5%, 10% and 15% of metakaolin, in relation to the cement mass. From the results, it was observed that the addition of metakaolin, while not significantly influencing the porosity, gave the concrete a greater resistance to axial compression, a decrease in the capillary absorption and delayed the advance of the carbonation front in the concrete.
Empirical method for structural damage location using dynamic analysis
Authors: SILVA R. L. , TRAUTWEIN L. M. , BARBOSA C. S. , ALMEIDA L. C. , SIQUEIRA G. H.
Published: March 2020

Abstract This paper presents the use of numerical model techniques for identification and damage location adopting the Modal Curvature Difference (MCD) method as reference for the analysis of a simply supported concrete structure. Then, an empirical formulation to detect damages in this structure is proposed. In this method, called Acceleration Summation Difference (ASD), the difference of acceleration amplitude between intact and damaged structures are calculated for concrete plates simply supported on rubber bearings. During the analyses, the finite element models were developed using SAP2000® software. The results obtained depicted that it is possible to determine the approximate position of one or more damages in the structure, with some restrictions, and the proposed ASD method presented good correlation to localize the position of single or multiple damages.
Thermal properties of polypropylene and high modulus polyethylene fibers reinforced concretes
Authors: AMARAL JR J. C. , MORAVIA W. G.
Published: March 2020

Abstract Concrete is one of the materials most used by the construction industry. Reinforcing this material with fibers is a technique used to improve its mechanical properties. Steel and polymer fibers are the main types used in this application and there are few studies about the influence of polymer fibers on the thermal properties of concrete. In order to analyze this influence, the present work carried out thermal conductivity, thermal expansion, and compressive strength after exposure to a temperature of 200 °C on specimens made of concrete with addition of polypropylene (PP) fibers and concrete with addition of high modulus polyethylene (HMPE). It was also conducted thermogravimetric analysis (TGA) on PP and HMPE fibers. The results show that the addition of polymer fibers alters the thermal properties of the concrete, reducing its thermal expansion, for example.
Study on concrete through its hardened state properties
Authors: MONTELONGO A. , PACHECO F. , CHRIST R. , TUTIKIAN B. F.
Published: March 2020

Abstract The composition characteristics of concrete, such as water/cement ratio, cement consumption and compressive strength directly affect its handling performance and durability. Thus, the technical standards related to concrete structures recommend technical specification concerning different environmental aggressiveness classes. Therefore, this study followed an experimental method aiming to evaluate the relationship between the characteristics of four different concrete mixes produced in accordance to the specifications of the standards EN 1992-1 and EN 206 for quality of hardened state concrete and its behavior during accelerated tests of carbonation and salt spray. Analyzes of compressive strength, void index, total and capillary water absorption, specific gravity, electrical resistivity and ultrasonic wave propagation velocity were executed. For the statistical treatment, a Multivariate Analysis of Variance (MANOVA) was performed, which provided a simplified analysis of the durable potential of reinforced concrete structures by its characteristics. Results lead to two major groups of behavior, and statistical significant differences in deterioration tests between mixes 1 and 4 for the salt spray test and between mix 4 and the others for the carbonation test.
Physical-mechanical potential properties of wastes from glass lapping to produce mortar as partial replacement of the conventional aggregate
Authors: RIBEIRO U. G. , SANTOS D. F.
Published: March 2020

Abstract Glass lapping residues (RLV) are fine tailings from the processing of glass for civil construction, commonly non-recyclable. The present study analyzed the use of these residues in Portland cement mortar composition, partially replacing the conventional aggregate, aiming at better compaction. Percentages of residues were adopted at 0% (reference), 5%, 10% and 20% by mass, replacing the fine conventional aggregate (sand). The binder used was Portland cement CP IV-32. The RLV and fine aggregate were submitted to physical tests, through grain size analysis, grain shape and specific mass; RLV and cement, in turn, submitted to chemical analysis by X-ray spectrometry, to identify the compounds. To evaluate the compressive strength and compaction analysis of the composite in the hardened state, cylindrical specimens 50x100 mm were produced. ANOVA (Analisys of Variance) and Coefficient of Variation showed that the RLV added in 5% resulted in lower voids indexes and moisture absorption than the conventional one. The tests also showed best mechanical performance on compression analisys (30,2 MPa) for 5% of residues in the composite, surpassing the conventional one.
Concrete beam subjected to shear and torsion: a comparison between the Brazilian Standard Code NBR 6118, ACI and AASHTO Provisions
Authors: ANDRADE R. C. de , BITTENCOURT T. N.
Published: March 2020

Abstract Most of torsion studies available are relative to pure torsion, arising from the exclusive application of a torsion moment in a concrete beam. This situation, however, is only possible in laboratories. In practice, the vast majority of twisted beams are subjected to the combination of shear forces and torsion, which gives rise to a more complex state of stress to be analyzed. The purpose of this paper is to present the provisions of the ACI 318/2014 Codes, AASHTO and ABNT NBR 6118: 2014 related to shear and torsion, and compare some results with experimental data from Rahal & Collins[3]. It is shown that if the recommended value of 45º is used for θ, the ACI 318/2014 provisions for shear-torsion interaction give similar results compared to ABNT NBR6118: 2014, but these results are very conservative. If the lower limit of 30º is used, the results obtained using both codes departs, and less consistent results are obtained. This paper concludes that using the recommended value of 36º obtained with the AASHTO provisions, some consistent and more accurate results are obtained.
Analysis of the global tall buildings stability in flat slabs considering the soil structure interaction
Authors: ALVES E. C. , FEITOSA L. A.
Published: March 2020

Abstract The global stability of tall reinforced concrete buildings made up of flat slabs is guaranteed, among other factors, by the existence of considerably rigid elements such as elevator cores and stairways. Such rigid cores recurrently have the "L" or "U" format because they fit the architectural design better. However, it should be emphasized the considerable relevance and influence of the slabs transversal bending stiffness in the building stability. The slabs act in conjunction with the columns in the building stability, in the so-called rigid diaphragm effect. That is, they combine the horizontal displacements in each floor and promote a partial restriction to the warping of the rigid cores and the rotation of the ends of the columns, thus reducing the horizontal displacements and the effects of 2nd order. In contrast the slabs transversal bending stiffenes, it should be emphasized the importance of considering the soil-structure interaction (ISE) in the buildings stability. In buildings formed by flat slabs ISE gains considerable relevance because of their characteristics, ie such buildings are particularly sensitive to the influences of soil-structure interaction. In this work, emphasis is placed on the influence of cross-bending rigidity on slabs and on Soil-Structure Interaction in the analysis and verification of the global stability of multi-storey buildings formed by flat slabs and rigid cores.
Simuladores com o software GeoGebra como objetos de aprendizagem para o ensino da física
Authors: Gutiérrez Araujo Rafale Enrique , Castillo Bracho Luis Andrés
Published: March 2020

Com o intuito de contribuir para o tema do uso de recursos didáticos no ensino das ciências com tecnologias digitais, neste trabalho apresentam-se dois simuladores computacionais elaborados com o software GeoGebra para abordar os movimentos parabólico e harmônico simples, caracterizando-os como objetos de aprendizagem de acordo à perspectiva de Kalinke et ál. (2015). Para realizar esta apresentação, descrevem-se dois planejamentos de aula nos quais estes simuladores podem ser inseridos. O desenvolvimento de cada planejamento de aula contempla o trânsito por três momentos nos quais se reflete sobre os aspectos teóricos a serem estudados, o uso do simulador para interagir com o fenómeno modelado e as conclusões às quais se pode chegar após a atividade realizada. Espera-se que este trabalho seja um apoio direto à prática profissional daqueles docentes que tenham vontade de integrar tecnologias digitais nas suas aulas e seja de inspiração para a criação dos seus próprios materiais didáticos.
Ortaöğretim Öğrenci Velilerinin Tarih Dersinden Beklentileri (Yozgat İli Örneği)
Authors: TURGUT Recep
Published: March 2020

Bir öğrencinin eğitimsel
başarısına, verimliliğine etki eden faktörlerden biri de velisidir. Ortaöğretim
tarih eğitiminde öğrenci, öğretmen, müfredat, okul vb. etkenlerle birlikte
öğrenci velileri de bu eğitimi etkileyen unsurlardan birisidir.  Bu araştırmanın amacı ortaöğretim öğrenci
velilerinin çocuklarının tarih dersinden hangi bilgi, beceri ve değerleri
kazanmalarını beklediklerini ortaya koymaktır. Araştırma Yozgat il merkezi ile
Yerköy ve Sorgun ilçeleri dahil olmak üzere toplam 15 ortaöğretim kurumunda
gönüllü olan 983 öğrenci velisi ile yarı yapılandırılmış veri toplama formu
yoluyla gerçekleştirilmiştir. Çalışmada fen, Anadolu, imam-hatip ve mesleki
liseler şeklinde farklı türdeki ortaöğretim kurumları belirlenmiş ve velilere
lisede tarih dersi alan çocuklarından hangi bilgi, beceri ve değerleri
kazanmalarını bekledikleri sorulmuştur. Elde edilen veriler içerik analizi
yöntemiyle incelenmiş ve elde edilen bulgular kodlanarak temalandırılmıştır. Bu
temalar Türk tarih bilgisi, tarih bilinci, vatanseverlik, milli değerler
şeklinde bilgi ve değer kazanımlarına yoğunlaşmaktadır. Araştırma sonuçları
velilerin bilgi ve değer yönünden beklentilerinin çok yüksek olduğunu ancak
beceri boyutuyla ilgili beklenti düzeylerinin çok düşük olduğunu
göstermektedir.
Tarih Öğretimi Bağlamında İnternete Özgü Epistemik Gerekçelendirme Ölçeğinin Türk Kültürüne Uyarlaması
Authors: ÜZTEMUR Servet , DİNÇ Erkan
Published: March 2020

Bu
araştırmanın amacı “İnternete Özgü Epistemik Gerekçelendirme Ölçeği”ni Türk
kültürüne uyarlayarak geçerlik ve güvenilirlik çalışmalarını yapmaktır.
İnternetten edinilen bilgilerin kapsamının çok geniş olması nedeniyle, bu
araştırmada konu alanı internet üzerinden erişilen tarihsel bilgiler ile
sınırlandırılmıştır. Çalışma Uşak ve Necmettin Erbakan Üniversitelerinde
2019-2020 öğretim yılında öğrenimine devam eden rastgele seçilmiş 192 sosyal
bilgiler öğretmen adayıyla gerçekleştirilmiştir. Doğrulayıcı faktör analizi ve
alfa iç tutarlılık hesaplamaları sonuçları, 12 maddelik ölçeğin üç boyutlu
(kişisel gerekçelendirme, çoklu kaynaklar tarafından gerekçelendirme ve otorite
tarafından gerekçelendirme) orijinal yapısının Türk kültüründe geçerli ve
güvenilir olduğunu ortaya koymuştur. Araştırma sonuçları; internetin bilgi
kaynağı olarak kullanıldığı post-truth zamanlarda, gençlerin web ortamında
karşılaştıkları bilgi iddialarının doğruluğunu sınama sürecinde benimsedikleri
epistemik gerekçelendirme stratejileri ile tarihsel muhakeme ve tarihsel
bağlamsallaştırma becerileri bağlamında tartışılmıştır.
Western blot protocol v1
Authors: Goulding Leah
Published: March 2020

Western blot protocol for detecting influenza A virus proteins
Immunofluorescence Confocal Microscopy v1
Authors: Goulding Leah
Published: March 2020

Immunofluorescence confocal microscopy method for assessing influenza nucleoprotein (NP) intracellular localisation.
THE ATTRACTIVENESS OF TOURISM AS A COMPONENT OF UKRAINE'S COMPETITIVENESS
Authors: Karyuk V.I.
Published: March 2020

The comparative characteristics of the definitions of «attractiveness of tourism» and «competitiveness of tourism» in the context of revealing the essence of economic approach to this concept have been made; determined the level of tourism attractiveness in Ukraine by analyzing the dynamics of the tourism competitiveness index; the necessity of introducing innovations into the tourism business is substantiated and the main types of innovations in tourism are identified; the factors influencing the competitiveness of tourist complexes, as well as the bases for elaboration of a complex concept of enhancing the competitiveness of tourism enterprises are highlighted; prospects for the development of domestic tourism business and the main directions of innovations in the tourism industry are determined. The purpose of the article is to investigate the essence of the concept of "attractiveness of tourism" and its relationship with the level of competitiveness of the country, as well as to determine the impact of innovative factors on the development of tourism business in Ukraine to improve and enhance the attractiveness of national tourism. The methodological basis of the article is general theoretical and specific research methods, in particular, the method of logical generalization (logical-dialectical) for revealing the essence and content of the category "attractiveness of tourism"; the method of scientific abstraction in substantiating the essence of the concept of "innovation in the tourism business"; graphoanalytical method for analysis, comparison and visualization of dynamics of the competitiveness index in tourism and travel of Ukraine in comparison with other European countries; systematic and integrated approaches - to substantiate types of innovations in tourism, to determine the main directions of development of competitiveness of domestic tourism.