bluuebunny/crossref_metadata_2025 huggingface dataset:
Culturally Responsive Program Evaluations
Authors: Stevens Helena , Peed Tracy
Published: May 2020

Program evaluations in education programs are conducted to address the outcomes, experiences, and phenomena that occur from programs. Program evaluation models are plentiful, and commonly used models include objectives, summative, formative, process, and outcome approaches. The strength of the model relies on the competencies and confidence of the evaluators. When used properly models are a reliable method for judging programs and their outcomes. Absent from these models is the intentional inclusion of culture. Culture is multidimensional and intersectional and holistically affects programs. Therefore, as the cultural makeup of the education systems continues to grow in diversity, program evaluation models must consider the impacts and influences that multi-dimensional culture has on programs at all stages of planning, delivery, and evaluation. This chapter provides specific areas of cultural identity to address with explicit steps for infusing deliberate emphasis into the program evaluation models.
Answering the Call for School-Based Mental Health
Authors: Starr Maxine Blanche Langdon
Published: May 2020

A largely unmet need exists for school-based mental health services by students who are of an ethnic minority and who may not have insurance, access, and/or the knowledge of mental health services. These same students may not receive effective, culturally sensitive counseling services, interventions, or valid/accurate measures of psychological testing. In order to resonate and connect with these students who need the most help and support despite these barriers to accessing quality treatment, what is the school-based mental health provider to do? This chapter will initially discuss a comprehensive review of culturally competent interventions for school-based mental health providers as well as recommendations for culturally competent training for mental health providers and school staff to ensure that culturally competent collaboration and appropriate support exists for all students.
Investigation of Thermal Fields at Phase Boundaries in Powder Mixtures that are Subject to Melting and Chemical Transformation
Authors: Dmitriev S.F. , Malikov Vladimir , Ishkov Alexey V.
Published: May 2020

An important part of the process of parts hardening by the induction surfacing method is the heating of hard alloy particles and flux in charge mixture. The article describes comprehensive studies on measurement and simulation of temperatures at phase boundaries in complex melting and heat-sensitive powder mixtures. To record the temperature in the induction surfacing process, it is proposed to apply CA micro-thermocouple method and the thermal indication method using SHS compositions. The developed methods for complex temperature recording in the process of induction surfacing allow to determine the melting temperature of the charge mixture and its single components.
Failure Analysis of Polymer Blinder Using Acoustic Emission Method
Authors: Khon H. , Bashkov O.V. , Bryansky A.A. , Solovev Denis B.
Published: May 2020

In this work the features of the propagation of the acoustic waves in the matrix sample (DERAKANE 411-350 epoxy vinyl ester resin) by the source pencil lead break (PLB) with different places and extract the feature of the registered AE parameters from the tensile test were studied. Using the typical features of the AE signals such as the frequency characteristic and the energy of the signals for classify and characterize the AE source in both PLB and tensile test. By analyzing the features of the AE signals based on the continuous wavelet transform, the features of the high frequency and the energy of the signal can be used to characterize the AE source, which is useful to establish relation between the characteristics of acoustic signals and the parameter of the fracture of structure in the material.
Reinforcement of Ice Crossings with Geosynthetic Materials
Authors: Karpushko Marina O. , Bartolomei Igor L. , Karpushko Elena N. , Zhidelev A.V. , Trapeznikov A.A.
Published: May 2020

An ice crossing is a road constructed on an ice-covered river, organized in the absence of a bridge, as well as in view of the impossibility of a ferry crossing in winter due to the formation of ice cover on water bodies. For most of the regions of Russia, in the cold season, the establishment of negative temperatures is typical, as a result of which ice crossing is a common transport facility. So, in the country annually opens more than 500 crossings, about 20 of which are located in the Perm Krai. Their opening takes place in December - early January, and closing - in late March - early April. The easiest way to arrange crossings is on natural ice, as a result of which their carrying capacity increases as the natural thickness of the ice increases. Because of this, the passing of heavy vehicles is possible only in January – February, which is a significant drawback. Today, there are several ways to artificially increase the carrying capacity, which include reinforcing the ice sheet with geosynthetic material. This method is a new and rather promising direction in road construction due to the reusable use of geomeshs. The article discusses the dependence of changes in the characteristics of the ice cover on the applied geosynthetic material, as well as technological and economic comparison of reinforcement variants. To this end, materials were collected on organized crossings of the Perm Krai, possible types of geomeshs were examined, and calculations were carried out to determine the carrying capacity of the crossing. This reinforcement method contributes to the earlier passage of heavy vehicles at the crossing, and also improves the safety of traffic on it and prolongs its service life.
Fine-Grained Concrete with Nanodispersed Silica Additive
Authors: Lukuttsova N.P. , Borovik E.G. , Pehenko D.A.
Published: May 2020

The effect of the modifying nanodispersed silica (NS) additive, obtained by the polycondensation method, on the properties of fine-grained concrete (FGC) is studied. It is revealed that the dependence of the NS-additive particle size on its age is extreme. The maximum number of particles of up to 100 nm in the additive is observed at the age of 10 days, and then their number decreases. However, it affects the FGC strength little even after 30 days of the additive storage. It is established that the NS-additive could be most effectively used with 0.23% of an active silica concentration and pH 4.1 in combination with S-3. At that, the porosity declines from 17.5 to 12.9% and the pore diameter diminishes from 3.171 to 0.689 μm. It leads to an increase in the compressive strength by 2 times and a decrease in water absorption by 1.6 times as compared to the control composition without additives. An increase in the frost resistance of the modified fine-grained concrete to F250 is recorded; it occurs due to a decrease in porosity at portlandite binding with amorphous silica additives into low-basic calcium hydrosilicates.
Analysis of the Structure of Cellulose Fibers Using the Imagej Program and Fibercement Properties on their Basis
Authors: Mestnikov A.E. , Fedorov V.I.
Published: May 2020

This article presents the results of an experimental study of the effect of morphometric parameters of secondary cellulose fiber from various brands of waste paper on the strength characteristics of cement stone. The article is based on the results of determining the morphometric parameters of cellulose fibers. Visual analysis of microphotographs of cellulosic fibers showed that the smallest fractions of fibers were obtained from newspaper waste paper of grade MS-8V. A causal relationship has been established between the fiber content and the strength of an incident stone. It was found that samples with a content of cellulose fibers of 0.5-0.75% of the mass of cement have high strength. The most durable were samples with the addition of cellulosic fibers based on newspaper recycled paper MS-8V.
Processes of the Foaming Mixture’ Components Interaction during the Foam Glass Synthesis
Authors: Goltsman B.M. , Yatsenko L.A. , Yatsenko Elena A.
Published: May 2020

The prospects for the use of foam glass in construction were described. The modern compositions of foaming mixtures for foam glass synthesis were considered. Compositions for studying the influence of the foaming mixture components on the formation of foam glass porous structure were developed, their internal structure and properties were studied. The role of each component of the mixture on its foaming was revealed. Glycerol is a pore-forming agent, which decomposes and produces foaming gases. Waterglass is a stabilizing agent reducing glycerol combustion process. Recommendations on the application of the described patterns in the foam glass synthesis were given.
Mechanical Properties of Superconcentrates Based on Ethylene-Vinyl Acetate Copolymer and Microcrystalline Cellulose
Authors: Shelenkov P.G. , Pantyukhov P.V. , Popov A.A.
Published: May 2020

In the study, highly filled superconcentrates based on various grades of ethylene-vinylacetate copolymer (EVA) and microcrystalline cellulose (MCC) were studied. It is assumed that adding superconcentrates to various polyolefins will make them biodegradable in the environment. The influence of EVA rheological characteristics and the content of vinyl acetate (VA) groups on the properties of the superconcentrates were studied. It was shown that increasing the concentration of VA groups in EVA leads to an increase in the elongation at break of the composites; increase in EVA melt flow index (MFI) greatly reduces the basic mechanical properties of the composite.
Synthesis of Poly(Ethylene 2,5-Furanoate): I. Kinetics of 2,5-Dimethyl Ester of Furandicarboxylic Acid Transesterification
Authors: Molodtsova T.A. , Boldyreva E.V. , Klushin V.A.
Published: May 2020

The kinetics of the 2,5-dimethyl ester of furandicarboxylic acid transesterification in the presence of various catalysts at different temperatures was investigated. It was shown that the catalytic activity follows the order: Mn (OAc)2 < Co (OAc)2 < Zn (OAc)2 < Ti (OBu)4. The transesterification catalyzed by Ti (OBu)4 leads to the formation of the polymers with the higher molecular weight compared to Me (OAc)2.
Destruction of Epoxy-Based Composite Materials under the Influence of Impact Load
Authors: Gafarova V.A. , Kuzeev I.R.
Published: May 2020

Some features of impact destruction are shown on the example of a composite material with epoxy matrix and hybrid filler, magnetic particles of iron oxide of micron size and nanoparticles of iron oxide are used in the capacity of it. Dependence of the impact viscosity of the material on the temperature was discovered experimentally, which demonstrates the increase of this value at the decrease of the temperature.
Microstructure of Filled Biocomposites Based on Polyolefin Blends
Authors: Mastalygina Elena E. , Anpilova A. , Popov A.A.
Published: May 2020

Binary and ternary composites based on low-density polyethylene and a copolymer of ethylene and vinyl acetate with / without the addition of microcrystalline cellulose have been investigated. The analysis of microstructure of the filled composites has shown more uniform distribution of particles at the mechanochemical treatment of the composite melt. Based on DSC study results, polymers amorphisation in the composites occurred under ultrasonic action. The stress-related characteristics of the materials increased that is explained by improved compatibility and partial copolymerization of the blended polymers.
High-Performance Polyesters: Synthesis, Characterization, and Properties of Poly(P-Oxybenzoate)
Authors: Akhmetshina A.I. , Karimova L.K. , Deberdeev R.Ya.
Published: May 2020

Poly (p-oxybenzoate) samples were synthesized via the esterification and the transesterification reactions. The structure of the obtained target products was investigated by IR spectroscopy and has revealed that these substances were oligomers. The transesterification method has facilitated the synthesis of higher molecular weight grades of the polymer. This resulted in enhanced thermal properties of polyester synthesized by transesterification (up to 340 °C). The other specimen has performed thermal stability up to 320 °C.
Analysis of Technological Capabilities and Peculiarities of Fuse Welding of Products Made of Metal-Matrix Composite Materials Based on Aluminum Alloy Produced by Internal Oxidation
Authors: Chernyshov E.A. , Kulinchenko N.A. , Zhilin P.L.
Published: May 2020

This paper describes the outcomes of practical experiments in the validation of a technology for welding of the Al-Al2O3 metal-matrix composite material produced by the internal oxidation method. Technological capabilities are herein considered for argon-arc welding (Tungsten Inert Gas/ TIG) with filler wire and arc welding in a protective inert/active gas medium using a melting electrode (Metal Inert Gas/ MIG) for joining sheets of A6 aluminum alloy-based metal-matrix composite material (MMC). Mechanical properties of welded joints are determined and the fracture macrostructure is investigated. Fracture patterns and tensile strength are shown for different modes of welding procedure for alloy plates of 5, 8 mm in thickness by the TIG method and 25 mm by the MIG method. The macrostructural and mechanical heterogeneity of welded joints is shown. Welds made under optimal conditions are free of any macrodefects. The welded joint strength is up to 96% of the base material strength.
Development of Multifunctional Composites Based on Ultrahigh Molecular Weight Polyethylene
Authors: Gogoleva O.V. , Petrova P.N. , Kolesova E.S.
Published: May 2020

The present study investigates the influence of carbon fibers of «Belum» brand on the performance properties of polymer composites based on ultrahigh-molecular weight polyethylene. It was established that the composite complex with the content of carbon fibers in the amount of 5 wt.% has the optimum complex of properties. The rate of mass wear is reduced by 3.3 times while maintaining the physical and mechanical characteristics at the level of the original polymer. It was established that the creep of PCM with the composition of UHMWPE + 5 wt.% Belum is 2 times less than the initial polymer. Also, the properties of the developed material based on UHMWPE were compared with unfilled and modified polytetrafluoroethylene (PTFE). It is shown that the creep of UHMWPE is less than the creep of PTFE by 12.5 times. The creep of the composite based on UHMWPE is less than the creep of the composite based on PTFE 13 times.
Microwave Electromagnetic Field Influence on the Stability of Reinforced Carbon Plastics with Built-In Lightning Protective Coating during Dynamic Loads Action
Authors: Zlobina I.V. , Bekrenev N.V.
Published: May 2020

Currently, significant part of advanced air transport structural elements is made of fiber-reinforced polymer composite materials (PCM), in particular, carbon plastics. In order to increase the resistance of these materials to static electricity and lightning discharges while air transport passes through lightning fronts, lightning protection coatings in the form of copper grids are incorporated into PCM structure . For load-bearing structures and aircraft shells, the influence of dynamic loads in the form of low-cycle high-amplitude loading and hitting by solid objects is typical. The presence of inbuilt metal structure introduces additional uncertainty into the anisotropic PCM perception of these loads. Studies of the strength of carbon-fiber-reinforced plastics with built-in LPC at low-cycle loading and their perception of shock load has been carried out. It is established that short-term processing in the microwave electromagnetic field leads to an increase in the strength of the samples under low-cycle loading by 210%. CFR with LPC absorbs a part of the shock impulse and does not transfer it completely to subsequent structures. The microwave electromagnetic field helps to improve the damping properties of materials by 19.5% in average with a low impact energy. With an increase in the impact force energy, the effect of the microwave electromagnetic field is manifested to a less extent; further improvement of the damping properties does not occur. It increases the elastic characteristics of the material and practically does not lead to cracking and exfoliation of the surface layer in the impact area. The results can be used in the development of technologies for final processing of the products made of PCM in order to increase their resistance to dynamic loads.
Treated Textile Electrostatic Properties Study
Authors: Cherunova I.V. , Tashpulatov S.S. , Kurenova S.V.
Published: May 2020

In the article research results are presented, which aim to provide treated textile electrostatic properties study. In the article research results are presented, which aim to provide find out abilities of an anti-electrostatic treatment and binding agents for it in treatment of special textile materials and their dependance from modes of operating textile washing. Results of determine a composition and abilities of a functional impregnation; develop a method to study values of electrostatic field for tribocharging conditions of textile materialsare; experimental studies of electrostatic values of materials with functional treatment depending on operating washing modes also presented here. Study results allowed to establish efficiency of the proposed combination of anti-electrostatic active composition based on 5 % solution of dialkyldimethylammonium chloride with a binding agent with the effect to preserve the treatment in the material structure and content of which is 4 % in application of textile fabric with widely used fiber content (cotton 53 %, polyester + oil and water-proofing finish). Acrylic dispersion is stable film-forming component suitable in preserving anti-electrostatic treatment on the surface of a textile material. The research was made in Don State Technical University within the framework of State Assignment of the Ministry of education and science of Russia under the project 11.9194.2017/BCh.
Study of the Stress-Strain State of the Process of Drawing Wire from an Alloy of Palladium with Nickel
Authors: Sidelnikov S. , Lopatin V. , Dobrovenko M. , Lopatina E. , Sokolov R.
Published: May 2020

This article present the results of studies of the process of wire drawing from the PdNi-5 alloy, performed using computer simulation in the DEFORM 3D software package. В качестве материала для исследований использовали сплав с содержанием 95% палладия и 5% никеля. An alloy with a content of 95% palladium and 5% nickel was a material for research. The patterns of changes in the stress-strain state for the current processing mode determined, and a more rational drawing mode with a redistribution of drawing coefficients along transitions proposed. For the proposed regime, using the created model, the values of drawing stresses, drawing forces and Cockcroft-Latham criterion determined. It was found that the stress distribution in the deformation zone corresponds to the generally accepted laws of their change, and their maximum values are realized in the metal located in the calibrating zone of the drawing die. In addition was revealed that the stresses in the current mode have limit values at the second and fourth passes. The redistribution of deformation indicators in the proposed mode allowed reduce the magnitude of these stresses and, thereby, reduce the likelihood of wire breaks. The maximum value of the Cockcroft-Latham criterion is achieved in the last transitions, but at the same time, destruction will not occur, since they do not exceed the limit value. The drawing force also decreases with the implementation of the proposed mode and does not exceed the permissible values regulated by the technical characteristics of the equipment. Since it is the proposed mode of wire drawing, it is characterized by a decrease in energy power indicators and the likelihood of wire breakage in the process of metal deformation it can be recommend it for implementation in existing production.
Improving the Characteristics of Wear-Resistant Coatings Obtained by HDTV-Boration, their Modification by Intermetallic Compounds of Fe-Al and Ni-Al Systems
Authors: Ivanaysky Victor V. , Krivochurov N.T. , Aulov V.F.
Published: May 2020

Innovative technology of HDTV-borating, that is distinguished by high hardness, strength, wear resistance and corrosion resistance occupies a special place among the hardening processes for steels and construction materials. During the new technology process HDTV-boration of structural steel 65Mn (65Г in Russian) under a mix layer of charge mixture based on fused borate fluxing agent P-0.66, boron carbide and intermetallic compounds FexAly, NixAly.Using the methods of X-ray phase analysis, spectrography and metallography, the composition and structure of coatings were determined, the microhardness distribution over the coating thickness was studied. In the coatings, new phases of intermetallic compounds, the double superhard boride Fe2AlB2, were found; in the coatings, the base iron boride is FeB, what leads to an increase in their hardness and wear resistance. Modification of boride coatings formed by intermetallic compounds with melting temperatures close to the process temperature of HFC surfacing leads to a decrease in the cracks number and the appearance of new consumer qualities of the material.
The Impact Evaluation of Factors on the Adhesion of Modified Polytetrafluoroethylene Films in a Glow Discharge Non-Thermal Plasma
Authors: Mokeev M.A. , Urkhanova L.A. , Khagleev A.N. , Solovev Denis B.
Published: May 2020

Mechanical, chemical and plasma treatment are the main kind of treatment of polytetrafluoroethylene (PTFE) films. Each method is different from each other by the adhesive force: the value of the wetting angle. Mechanical treatment allows different particles to permeate into the structure of the polymer. Chemical treatment creates new functional groups on the polymer surface, but this method is toxic and dangerous. Plasma treatment, in a glow discharge non-thermal plasma, is a more ecological and practical method. The experiment showed that the plasma treatment successfully increases the adhesion, this has been proven by infrared spectroscopy and scanning electron microscopy. According to the obtained data of the wetting angle, the regression equation was derived. A graphical model is constructed by regression equations allows you to determine the main processing factor and choose the optimal values of treatment.
Modifying the Metal Oxide Filler with a Silicon-Organic Oligomer in a Solution of an Organic Solvent
Authors: Yastrebinsky R.N. , Karnauhov A.A. , Yastrebinskaya Anna V.
Published: May 2020

The use of tungsten dioxide as a filler for a non-polar polymer matrix is limited due to its high hydrophilicity and abrasiveness, which degrades the properties of the filled polymers. The paper presents the results of studies on the surface modification of tungsten oxide with organosilicon polyethylsiloxane. The mechanisms for modifying the surface of tungsten dioxide, based on the fixation of the modifier under the action of intermolecular forces of attraction and interaction of the hydroxyl groups of the oxide surface with the reactive bonds of the Si-H oligomer, have been established. To create additional active centers in the form of groups (–OH) on the surface of tungsten dioxide, it was boiled, which contributes to the forced hydroxylation of the surface. The adsorption of polyethylsiloxane with powdered tungsten dioxide from n-hexane solution was investigated. The results on determination of the wetting angle of unmodified and modified tungsten dioxide powder are presented. It has been established that modification with polyethylsiloxane leads to an increase in the wetting angle of tungsten dioxide to 121o, which indicates its hydrophobic properties.
Foam Concrete and Composite Fittings Cohesion Parameters: Experimental Result and Numerical Simulation
Authors: Kotova K.S. , Slavcheva G.S.
Published: May 2020

The article presents the computer simulation results and real experiment of foam concrete cohesion with glass-composite, basalt-composite and metal fittings in bending elements. Numerical simulation of beams implemented with software package “Lira-SAPR 2013” using finite element method for modeling. For real experiment used bending beam test method according to ISO 10406-1:2015. As a result, the influence of the loading level and foam concrete density on the reinforcement slipping value and foam concrete cohesive strength with reinforcement in the bending elements. The foam concrete cohesive strength with glass-composite fittings meets the standard requirements, so it can be recommended for the foam concrete bending elements reinforcement. Verification of the computer simulation results with the real experiment data allowed to establish the efficiency of the used numerical model and revealed the need to use the cohesion parameters in the "foam concrete – reinforcement" system for foam concrete structures calculations in specialized programs.
Simulation of Nonlinear Pyroelectric Response of Ferroelectrics near Phase Transition: Fractional Differential Approach
Authors: Moroz L. , Maslovskaya Anna
Published: May 2020

The paper is devoted to mathematical modeling pyroelectric current of ferroelectric single crystal under the conditions of intensive light heating in view of fractal behavior of these materials. The proposed approach is based on numerical simulation of thermal distribution in a ferroelectric sample using time fractional operator as well as computation of pyroelectric response. The simulation results for typical TGS ferroelectric crystal were described in one-dimensional case of the model in comparison with experimental data. Pyroelectric signals depending on temperature pyroelectric coefficient and thermal physical characteristics were also analyzed.
Experimental Evaluation of Thermal Protection Properties of Volume Textile Materials
Authors: Cherunova I.V. , Kovaleva A.A. , Nazarenko E.V.
Published: May 2020

In the article research results are presented, which aim to provide evaluation of thermal protection properties of volume textile materials. However, as a result of experts wearing it has been revealed that by their operational performance their characteristicsare quite high to such materials: Holofiber, Tinsulate, Arctic, etc. At the present time to research thermal protection properties of sewing materials methods are used that can be divided into 2 groups: Methods based on the principle of steady heat mode and Methods based on the principle of unsteady (regular) mode. New device has been developed which allows to simplify both the schematic diagram and the methodological approach to experimental evaluation of thermal protection properties of volume textile materials. The corresponding experimental research were held based on the developed bicalorimeter. Study results allowed to establish heat insulation material «ArcticP» possesses the highest thermal resistance.It is located with its metallized coating facing outside. High values of thermal protection properties of this material are explained by availability of metallized coating from outer side which ensures partial heat reflection.. The research was made in Don State Technical University within the framework of State Assignment of the Ministry of education and science of Russia under the project 11.9194.2017/БЧ.
Development of a Mathematical Model of the Interrelation between the Technological Parameters of the Synthesis and Properties of Foamed Glass Materials
Authors: Yatsenko L.A. , Yatsenko Elena A. , Goltsman B.M.
Published: May 2020

For optimal experimental design and development of a mathematical model of the relationship between the technological parameters of synthesis and the properties of foam glass materials, statistical methods were used to design an experiment with a mathematical description in the form of a polynomial. A fractional factorial experiment was carried out, multivariate regression models of linear structure were constructed and analyzed, the Pareto model for standardized model variables, the Pareto curve of the dependence of the response function on independent variables, a histogram of the predicted values of the independent variables and their influence on the effective factor, the dispersion model of the indicator values, the projection of the relationship of factors with a dependent variable, the mathematical equation of the relationship of factors and the effective indicator of the response function.
Theoretical Preconditions for Determination of the Elastic Modulus of Clt-Panels
Authors: Labudin B.V. , Karelskiy A.V. , Lyapin D.M.
Published: May 2020

Cross laminated timber panels (CLT) are promising building structures that are actively used in the construction of buildings around the world. In Russia the construction is rarely used, despite the existing factories for their manufacturing. In regulatory documents there are no specific data on the elastic modulus for these structures. As a method for determining this calculated characteristic, a numerical experiment in the SCAD Office software package is proposed. During the experiment, panels of various thickness and different numbers of layers are considered. Based on the obtained displacements from the action of the applied load, the values of the elastic modules are determined and summarized in the table. According to the results of the calculation, graphs of dependences of the reduced elastic modules on the thicknesses and the number of layers are constructed and analyzed.
Treatment of swine wastewater using the Fenton process with ultrasound and recycled iron
Authors: João Jair Juarez , Silva Cíntia Souza da , Vieira José Luiz , Silveira Milena Felipe da
Published: May 2020

Pork production involves the generation of wastewater containing a high pollutant load. Although the biological systems show satisfactory efficiency for the treatment of these effluents, they demand an elevated area for installation and high production of biological sludge. Alternatively, oxidative processes are an alternative for treating such effluents, requiring minor areas and increasing the efficiency of the treatment. We studied the Fenton process assisted with ultrasound for the treatment of swine slaughterhouse wastewater. Nails used in civil construction were used as the iron source. We evaluated the influence of pH, contact time, nail mass, and hydrogen peroxide concentration on color removal, turbidity, chemical oxygen demand (COD) and biochemical oxygen demand (BOD5). The removal of nutrients and oils and greases was also evaluated. The best results using the ultrasound-assisted Fenton process were obtained at pH 3, hydrogen peroxide concentration 90 mg L-1, and a nail unit (2.7g). In these conditions, color, turbidity, COD, and BOD5 removal of 98, 98.2, 84.6, and 98%, respectively, were achieved. The reduction in the other parameters evaluated was above 70%. Catalytic activity maintained above 90% until the sixth cycle of use. In general, the ultrasound-assisted Fenton process using the nail as a catalyst would be an alternative for the treatment of swine slaughterhouse wastewater. This alternative is responsible for the higher removal of organic load and nutrients in a shorter time when compared with biological systems.
Traitement et prévention de la cryptosporidiose chez les jeunes ruminants (chevreaux) : intérêt des polysaccharides naturels
Authors: Adjou Karim Tarik
Published: May 2020

Cryptosporidiosis is a cosmopolitan parasitosis affecting many animal species. It causes neonatal diarrhea in ruminants causing economic losses in farms. The main protozoan responsible is Cryptosporidium parvum. No fully effective treatment is available to control cryptosporidiosis. In this article, we present a new therapeutic approach based on the use of natural polysaccharides (chitosan). In our work, using 2 in vitro models of intestinal cells (HCT-8 and Caco-2), we have shown that Chitosan is effective in reducing the number of oocysts of C. parvum. Another study was also conducted to confirm these inhibitory effects on experimentally infected goat kids. The results show, in infected animals treated with a product containing Chitosan, a decrease in faecal excretion of C. parvum oocysts and the severity of diarrhea.
Parasitologie et environnement : exemple de démarche « One health »
Authors: Dreyfuss Gilles
Published: May 2020

Le parasitisme est un concept lié au comportement qui conditionne le développement des organismes dans leur environnement. Il s’exprime différemment selon leur développement cyclique. Les modifications de l’environnement parasitaire sont nombreuses : probabilité de contact hôte-parasite, climat, éthologie des espèces, anthropisation, habitudes et réceptivité de l’hôte. Les facteurs environnementaux sont encore plus déterminants sur le développement parasitaire si le cycle biologique nécessite un hôte intermédiaire. Deux concepts dominent les relations entre parasites et environnement : la coévolution et l’adaptation. Les parasites représentent un modèle d’étude de l’approche «One health» .
Knowing Your Team: Rapid Assessment of Residents and Fellows for Effective Horizontal Care Delivery in Emergency Events
Authors: Dennis Bradley , Highet Alexandra , Kendrick Daniel , Mazer Laura , Loiselle Sean , Bandeh-Ahmadi Hoda , Gupta Tanvi , Abbott Kenneth , Lea Jarrett , Dang Thu , Ramey Mischon , George Brian , Terhune Kyla
Published: May 2020

Background

Horizontal care, in which clinicians assume roles outside of their usual responsibilities, is an important health care systems response to emergency situations. Allocating residents and fellows into skill-concordant clinical roles, however, is challenging. The most efficient method to accomplish graduate medical education (GME) assessment and deployment for horizontal care is not known.

Objective

We designed a categorization schema that can efficiently facilitate clinical and educational horizontal care delivery for trainees within a given institution.

Methods

In September 2019, as part of a general emergency response preparation, a 4-tiered system of trainee categorization was developed at one academic medical center. All residents and fellows were mapped to this system. This single institution model was disseminated to other institutions in 2020 as the COVID-19 pandemic began to affect hospitals nationally. In March 2020, a multi-institution collaborative launched the Trainee Pandemic Role Allocation Tool (TPRAT), which allows institutions to map institutional programs to COVID-19 roles within minutes. This was disseminated to other GME programs for use and refinement.

Results

The emergency response preparation plan was disseminated and selectively implemented with a positive response from the emergency preparedness team, program directors, and trainees. The TPRAT website was visited more than 100 times in the 2 weeks after its launch. Institutions suggested rapid refinements via webinars and e-mails, and we developed an online user's manual.

Conclusions

This tool to assess and deploy trainees horizontally during emergency situations appears feasible and scalable to other GME institutions.
Évaluation des effets d'une prise en charge de l'entourage sur les capacités de communication d’un patient aphasique et de son partenaire de communication
Authors: Gillet Sophie , Bonnet Juliette , Hiernaux Anne , Poncelet Martine
Published: May 2020

L’aphasie affecte à la fois la communication de la personne aphasique et celle de son entourage qui peut adopter des comportements inadaptés de communication avec le patient. Nous avons mis en place un programme d’intervention inspiré de Simmons-Mackie, Kearns, & Potechin (2005) qui avait pour objectif de réduire l’occurrence de comportements non facilitateurs de communication produits par le conjoint d’une personne aphasique. Cinq comportements non facilitateurs ont été sélectionnés en fonction de leur nombre élevé d’occurrences. Deux d’entre eux ont fait la cible d’une intervention spécifique consistant à entraîner le conjoint à les identifier et à les remplacer par des stratégies de communication plus adaptées. Un comportement a fait l’objet d’une intervention psychoéducative et deux comportements n’ont fait l’objet d’aucune intervention afin d’évaluer une éventuelle généralisation de l’intervention à des comportements non travaillés. Les résultats montrent que seule l’intervention spécifique a permis d’améliorer les habiletés de communication du couple.
Normalisation franco-québécoise d’une batterie d’Évaluation des Compétences de Lecture chez l’Adulte de plus de 16 ans (ECLA 16+)
Authors: Rosier Clothilde , Tabet Sabrina , Gauthier Sandra , LeBlanc Joanne , de Guise Elaine
Published: May 2020

La normalisation des outils d’évaluation du langage écrit fait face à certaines lacunes compromettant la fiabilité diagnostique. La batterie d’Évaluation des Compétences de Lecture chez l’Adulte de plus de 16 ans (ECLA 16+) est un outil de dépistage normé sur la base de sujets français de 16 à 18 ans, aux niveaux de scolarité peu distincts. Cette normalisation n’est alors pas représentative de la population franco-québécoise. L’objectif de cette étude était d’établir des normes de l’ECLA 16+ adaptées au Québec, à différents âges (de 16 à 68 ans) et à différents niveaux scolaires (du secondaire à universitaire). Pour cela, la batterie a été administrée à 165 participants franco-québécois répartis selon trois niveaux scolaires et trois tranches d’âge. Des analyses de régressions ont montré des effets de l’âge et du niveau scolaire sur les performances de lecture. Ainsi, l’utilisation de cette normalisation permet d’optimiser l’évaluation des troubles du langage écrit des Franco-québécois.
Enhancing Flipped Mathematics Education by Utilising GeoGebra
Authors: Weinhandl Robert , Lavicza Zsolt , Hohenwarter Markus , Schallert Stefanie
Published: May 2020

Combining new educational approaches and educational technologies can make mathematics education more adaptable to pupils’ needs in the 21st century. Our explorative educational study aimed to identify how learning settings and learning environments should be designed to facilitate synthesising flipped approaches to education and using GeoGebra. To discover how to combine flipped approaches and GeoGebra in mathematics education, we conducted a nine-month educational study at a Viennese secondary school. In our study, we focused on pupils’ needs, as pupils are key to combining successfully new educational approaches and using technologies. Analysing our qualitative research data following design-based and grounded theory approaches indicates that the categories (a) clear task definition and task design, (b) feedback, (c) context and benefits, and (d) single-source learning environments are important for pupils when utilising GeoGebra for enhancing flipped education.
Teacher Talk in Professional Learning Communities
Authors: Brodie Karin , Chimhande Tinoda
Published: May 2020

Professional learning communities can be important sites for teacher learning depending on the quality of the conversations in these communities. This paper shows how different activities in teacher communities support different kinds of conversation at different levels of depth, through examining the conversations of four professional learning communities of mathematics teachers over two years. Our analysis suggests three key findings. First, there were strong relationships between different activities and the content of the conversations in the communities. Second, the depth of the conversation in the communities was constant across activities and over time. Third, conversations about learner thinking, a key goal of the project, did not increase over time, but there were increases in talk about mathematics and practice. We explore the implications of these findings for teacher learning.
A Multilevel Binary Logistic Regression Model of Success in Anatomy and Physiology I: A Retrospective Analysis
Authors: Lindsay Keston G.
Published: May 2020

Anatomy and physiology (AP) are subfields of biology that are gatekeeper courses for the health professions. This exploratory study used multilevel binary logistic regression to determine if age/gender and race/ethnicity were used as predictors of success, while the term offered and the identification number were specified as random effects. Two models were used. Those earning the grades of A, B and C were defined as successful for both models. Those earning the grades of D and F and those who withdrew (W) were defined as successful for one model, while the other model had the withdrawals removed. Ethnicity and gender predicted success in both models, with Native Americans and African Americans being less likely to succeed than Caucasians with the withdrawn students included. The model without withdrawn students was similar, except Hispanic students were also less likely to succeed than Caucasians. Females were more likely to succeed than males in both models. Efforts to retain equity in AP pedagogy should be prioritized.
Changes in Nature of Science Understandings of Preservice Chemistry Teachers in an Explicit, Reflective, and Contextual Nature of Science Teaching
Authors: Celik Suat
Published: May 2020

This study aimed to investigate changes in the understandings of the Nature of Science (NOS) of preservice chemistry teachers after participating in the explicit, reflective, and contextual NOS teaching. The sample of the study consisted of nine preservice chemistry teachers who attended scientific research methods course at the undergraduate level. The study was designed and conducted according to the qualitative research method. Preservice chemistry teachers' understandings of the NOS was collected through the "Views on the Nature of Science-C" (VNOS-C) questionnaire, which consists of 10 open-ended items. The questionnaire was translated and applied before and after an explicit, reflective, and contextual NOS teaching. The data were analyzed descriptively through the use of a rubric. To ensure the reliability of the collected data, interviews were also conducted with participants to clarify their answers to the questions. According to the results, it was determined that the majority of the participants had a very poor understanding of NOS before teaching. It was determined that changes in the understandings did not occur at the desired level for all NOS aspects despite some positive changes after the teaching.
EDUCAÇÃO E COVID-19: AS TECNOLOGIAS DIGITAIS MEDIANDO A APRENDIZAGEM EM TEMPOS DE PANDEMIA
Authors: Barros dos Santos Junior Verissimo , Monteiro Jean Carlos da Silva
Published: May 2020

The article addresses digital technologies as a key element for mediating the learning process in pandemic times. It aims to present the pedagogical potential for remote teaching with Google Classroom and ZOOM application, asynchronous and synchronous communication tools, respectively. This study of a descriptive- exploratory nature, uses bibliographic and documentary analysis to discuss the contributions of digital technologies to the learning process in times when education is forced to face a new scenario due to the COVID – 19. The results demonstrate how the learning process had to adapt in times of pandemic, especially with the use of digital technologies. In this context, the study considers that although Google Classroom and the ZOOM applications are effective tools to remote mediation, their strategic insertion into the formative process demands more technology training for teachers.
Expediente
Authors: De albuquerque: revista de história Editores
Published: May 2020

Expediente e ficha catalógráfica de albuquerque: revista de história.
Exposição Cênica – Arqueologia Histórica de Mato Grosso do Sul
Authors: Martins Gilson Rodolfo
Published: May 2020

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Capa e quarta capa
Authors: Leite Marília , Godoi Lennon
Published: May 2020

Imagens da versão impressa.
Baudelaire a mulher e ‘Amor Que Não Ousa Dizer Seu Nome’
Authors: Menezes Marco Antonio de
Published: May 2020

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A cerca dos problemas enfrentados pela burocracia do exército na introdução do sorteio militar no estado de Mato Grosso (1916 – 1945)
Authors: Silva Ferreira Bruno Torquato
Published: May 2020

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Capa e quarta capa
Authors: Leite Marília , Godoi Lennon
Published: May 2020

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Indústrias mineradoras no desenvolvimento de Corumbá
Authors: Nascimento Tchoya Gardenal Fina do
Published: May 2020

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Eurocentrismo, racismo e la estigmatización del diferente no contexto da Globalização
Authors: Marin José
Published: May 2020

Este trabalho tem um caráter introdutório e não tenta esgotar ou explicar todos os múltiplos rostos de categorias históricas tão complexas como o eurocentrismo e o racismo. No entanto, essas categorias são muito importantes para traduzir, interpretar, entender e imaginar alternativas, para nossas realidades americanas, dentro de um contexto de globalização. Um processo que causa grandes mutações geopolíticas prejudicando grandes setores sociais. Além de destruir muitas certezas e verdades definitivas. O mundo de hoje enfrenta grandes desafios, desde a preservação de nossos ecossistemas até a forma de imaginar a forma social, viver juntos, com um mínimo de respeito e dignidade para todos.
Estudantes e intelectuais do PCB: a luta por liberdades democráticas durante a ditadura
Authors: Rodrigues Gomes Aguinaldo
Published: May 2020

A discussão da resistência de intelectuais e estudantes do PCB ao regime ditatorial, aqui, insere-se no recente debate historiográfico acerca do tema, que tem buscado pensar como esse acontecimento político, um dos mais dramáticos de nossa história, repercutiu fora dos centros de poder do Brasil – eixo Rio-São Paulo. Portanto, a ênfase recairá sobre as estratégias do PCB na construção de uma luta pelos diretos civis no campo educacional por parte de estudantes e professores que ousaram enfrentar o regime em defesa das liberdades de expressão
Effects of BMI and Food Habits on Menstrual Characteristics among Adolescent Girls
Authors: Amgain Kapil , Neupane Sujana
Published: May 2020

Background: Menstruation, a normal physiological process in a woman’s body is affected by dietary habit and it can arise different menstrual disorders. The aim of this study is to find out the menstrual health status of young female and its association with their food habit.

Methods: A cross-sectional study was conducted among the nursing students of Maharajgunj Nursing Campus from March 2019 to September 2019.. Pretested and semistructured questionnaire was used to collect the data regarding menstrual history, dietary habit, fast food intake, and food skipping behavior. HEAT (Healthy Eating Assessment Tool) Score was used to assess the food habit and the Visual Analogue Scale (VAS) was used to assess the intensity of dysmenorrhea.

Result: Data was collected among 140 students. The mean age was 24.56±2.65 years. The study showed that 87.9% had problems, and 80.7% have dysmenorrhea. The occurrence of the menstrual problems was more in the participants who were having a non-vegetarian diet than in a vegetarian diet which was statistically significant (p<0.001). Similarly, 68.6% of the participants eat fast food and 91.6 % of them have menstrual problems. Meal skipping habit was found to significantly associated with the menstrual problems (P=0.03). Similarly, 105 (75%) of the participants had good food eating habits, and 32 (22.9%) of the participants had a poor eating habit. The poor eating habit was significantly associated with menstrual problems. The intensity of dysmenorrhea was more in the participant having a nonvegetarian diet. Further, the pain was more severe among the participants who consume tea and coffee more frequently.  

Conclusion: The menstrual problems were the alarming problems in the adolescent college going girls of Kathmandu Valley. BMI and excessive intake of junk/fast food, alcohol and tea/coffee had a significant association with menstrual problems.