bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effect of Radiation Sterilization on the Stress-Strain Properties of Non-Woven Materials -Based on Polypropylene
Authors: Rakhmatullina Elvina R. , Lisanevich M.S. , Galimzyanova Rezeda Yu. , Khakimullin Yu.N.
Published: May 2020

Non-woven materials are widely used for the manufacture of disposable medical clothing and underwear. Radiation is widely used to sterilize single-use medical devices. The paper analyzes the effect of ionizing radiation at absorbed doses of 0-60 kGy on the stress-strain properties of medical non-woven spanmelt material based on polypropylene obtained by blow-molding technology. It has been established that ionizing radiation significantly reduces the breaking load and elongation in the machine and cross directions of the web. For this type of material, the most critical is the decrease in strength in the cross direction of the web, primarily because the level of strength in the cross direction of spanmelt materials is generally low. Sterilization by ionizing radiation further reduces strength and leads to the fact that non-woven materials irradiated with an absorbed dose of 50-60 kGy are close to unacceptable values in accordance with the requirements of EN 13975-2011.
Impact Toughness of Low Alloy Steels Subjected to Heat Treatment and Equal-Channel Angular Pressing at Low Temperature
Authors: Ivanov A.M. , Alexandrova E.S.
Published: May 2020

The paper deals with the impact toughness and fracture mode of the low-alloy 09G2S steel in the as-delivered state and in the condition after equal-channel angular pressing (ECAP) and annealing at impact bending in the temperature range of 293-203 [K]. The results on impact toughnessKCVand fracture mode of Charpy test specimens made of the 09G2S steel in the as-delivered state and in the condition after hardening are presented. There is a decrease in the steel impact toughness in the examined temperature range after annealing at 673 [K], ECAP, and ECAP with annealing compared to the corresponding value for steel in the as-delivered state. For the 09G2S steel treated with various techniques, the temperature-KCVplot drop occurs smoothly, without abrupt changes, in the examined temperature range, in contrast to the behavior of this value with the upper threshold of the fracture appearance transition temperature for the steel in the as-delivered state.
Kinetics of Phase Transformations in FeAl(Cr,Si) / Fe3Al(Cr,Si) / Fe(Al,Cr,Si) Laminated Coating on the Cr15Al5 Alloy
Authors: Shmorgun Victor Georgievich , Bogdanov Artem I. , Kulevich Vitaliy P. , Kharlamov V.O.
Published: May 2020

The influence of thermal action at 1150 °C on the kinetics of phase transformations in a layered coating FeAl (Cr,Si) / Fe3Al (Cr,Si) / Fe (Al,Cr,Si), obtained using a technology involving aluminizing of an Cr15Al5 alloy by hot dipping in silumin melt AK12M2 and heat treatment. It was shown that after 100 hours of exposure, the visually distinguishable boundary between the coating and the alloy disappears. The aluminum content in the Cr15Al5 alloy increased to 17 at. %, silicon up to 3 at. %, and chromium is reduced to 14 at. %. The microhardness of the alloy increases from 1.6 to 2.4 GPa and survivability at a test temperature of 1150 °C increases from 120 to at least 920 hours.
Development of Ultra-Fluid Compositions of Feedstock for Metal Injection Molding
Authors: Korotchenko A.Yu. , Khilkov D.E. , Tverskoy M.V. , Khilkova A.A.
Published: May 2020

In this paper, to reduce the cost of production of parts by injection molding technology of metal powder mixtures (MIM technology), it is proposed to use metal powder mixtures (feedstock) with high fluidity for the manufacture of green parts. High fluidity is achieved by increasing the proportion of paraffin wax in the binder. This can significantly reduce the pressing pressure when pressing the feedstock into the mold cavity to values less than 1 bar, and eliminate the use of expensive injection molding machines with high compression pressure. High fluidity also allows the use of powders with large particle sizes, which significantly reduces the cost of feedstock. The absence of high pressure on the mold walls during the pressing of the feedstock allows the use of molds made of cheaper materials such as silicone, plastic, gypsum and others.
Prospects for the Development of Building Ceramics Based on Clays and Nickel Slags of Orenburg Region
Authors: Gurieva Victoria A. , Ilyina Anastasia A. , Doroshin A.V.
Published: May 2020

This paper discusses the properties of ceramic bricks produced on the basis of the raw material base of the Orenburg region, namely, waste generated during the development of brown coal from the Tyulgansk deposit - white and red clays and nickel slag of JSC Southern Urals Nickel plant of the Orenburg region. Man-made products, namely dumps of nickel slags of non-ferrous metallurgy, is a serious problem from the point of view of environmental pollution, therefore the disposal of this type of waste is relevant. One of the directions of disposal of these wastes is their use as an additive in the manufacture of ceramic products. The study presents data from the study of the technological properties of the raw materials, the development of the composition of the ceramic mixture. The influence of the material composition of the clay / slag mixture on the compressive strength, fire shrinkage, water absorption and density of experimental samples - bricks after calcination at a temperature of 1000 ° C is determined.
Analysis of Fractional Composition and Specific Surface of Silicone Dioxide Nanopowders
Authors: Kravtsova O.N. , Vinokurov G.G. , Struchkov N.F.
Published: May 2020

For the development of new compositions of modified powder mixtures a comprehensive analysis of the technical characteristics of powder additives is required. The specific surfaces of nanosized powders of "Tarkosil" silicone dioxide were determined by the experimental method. Therefore, at present, the estimating relationships of sizes, particles shapes and specific surface area of nanosized powder is relevant scientific and practical task. And the particles shape was evaluated by the values of these surfaces. Using the method of small-angle scattering the functions of distribution of the modifying powders particles on their sizes were estimated, and the average values of particles size of "Tarkosil" powder were specified The particle shape of the modifying powders has been estimated according to the specific surface values. The particle shapes of T50 powders are close to isometric (a ball, a cube); particle shapes of T150 powders correspond to a tetrahedron, the particle size T80 and T110 corresponds to the intermediate value of the specific surface area.
Chemically Resistant Glass-Enamel Coating for the Protection of Steel Pipelines
Authors: Klimova L.V. , Ryabova A.V. , Kerimova V.V.
Published: May 2020

At present, the problem of obtaining a defect-free corrosion-resistant glass-enamel coating for steel pipelines is extremely urgent. In this paper, the development of a corrosion-resistant glass-enamel coating for steel pipelines is presented, as well as the technical and operational properties of synthesized glass-enamel coatings are investigated. The composition of the enamel coating is developed, which has a high adhesion index, chemical resistance to aggressive media and can be recommended for introduction in the production of enameled pipes.
Structural and Mechanical Aspects of Creating Coatings Based on Biopolymers
Authors: Titov E.I. , Sokolov Alexander Yu. , Litvinova E.V.
Published: May 2020

Structural and mechanical features of collagen-containing raw materials and biomaterials that can be used as coatings based on biopolymers are presented. Studies reveal the presence of materials with targeted texture, rheological properties; chemical composition and biocompatibility. In particular, for mycelial fungi.
Rhenium as a Perspective Anodic Material in Materialogy of Surface at Electric Spark of Alloying
Authors: Ivanov Valeriy I. , Konevtsov L.A. , Aulov V.F.
Published: May 2020

Electric spark of alloying – ESA – from the standpoint of materialogy, a new stage in the development of the materials science, is a method of surface hardening that refers to technologies meeting the new development vector of the materials science, including its most important sections – surface materialogy. As an anode material, an unconventional material for the electric-spark coating method (ESA) - rhenium is of practical interest for creating protective and hardening coatings. The results of studies of the formation modes by the method of ESA are given on the surface of steel grade 35 of the alloyed layer and its properties using the anodic material from rhenium is shown. The kinetics of the doped layer formation depending on the ESD regimes, their justification is shown. It is established that with an increase of the frequency of discharge pulses in the range of 1600>fcps>20 Hz, a trend to increase the thickness of the AL hav.AL is observed, and with an increase in energy 1.8>E>0.11 J, on the contrary, there is a trend of its decrease; the latter is associated with a decrease of the pulses frequency with the increase of energy. The obtained series of the efficiency of the ESA process make it possible to predict the achievement of the required parameters of the doped layer using Re as the anode material.
Processing the Working Parts of Tools Used in Construction Industry Using High Energy Methods
Authors: Bogoduhov S.I. , Kozik E.S. , Shvidenko E.B. , Garipov B.S.
Published: May 2020

This paper considers the effect of hardening of throwaway cutting inserts made of hard alloy T15K6 using continuous laser impact at various modes. Tests were carried outon inserts made of hard alloy T15K6. The cutting properties of the inserts were determined by cutting on a T612 vertical milling machine. A face mill with a diameter of 100 mm with mechanical mounting of tested inserts was used as a tool.Dry milling was performed using two inserts. At that, cutting mode was of impact natureas the mill diameter was larger than the width of machined workpiece. Number of passes – 5. Cutting modes:v = 197 m/min, h = 1 mm, S = 160 mm/min, b = 90 mm. Machiningwasperformedonworkpieces made of 40X grade steel (GOST 4543-71). Workpiecedimensions– 160x60x90 mm. During the machining, hard alloy inserts moved beyond the workpiece edge and cut into it from the other side. One of the main performance characteristics of hard alloys is material rigidity (modulus of elasticity, Е). Tests were carried out after various types of laser impact at bending and material rigidity was determined by strain gauging. Decreasein the slopeofstraight-lineportionofrelativestrain-versus-stress curve at bending indicates the decrease in hard alloys’ modulus of elasticity after laser processing. Small defect structure is being formed.
Insulation Systems of Frameless Buildings
Authors: Bobrova Ekaterina Yu. , Ter-Zakaryan K.A. , Zhukov Alexey D. , Medvedev A.A. , Poserenin A.I.
Published: May 2020

The article analyzes different ways of creating an insulating coating within the scope of frameless buildings. Among such constructions, the production halls, raw material and finished-products storages, agricultural storages, livestock housing, garages, covered parking, sports and cultural facilities are to be distinguished. Criteria that the heat-insulating materials should meet in the context of effective and durable insulation coatings are low thermal conductivity, vapor and water permeability, high operational durability and environmental friendliness as well.
It is confirmed that products based on polyethylene foam, such as mats and rolls, fully meet the above-mentioned criteria. Furthermore, the possibility of obtaining a seamless joint during the installation process significantly increases the effectiveness of the insulating coating by means of minimizing cold bridges and eliminating leakages when connecting separate insulating elements.
Polyethylene foam is an elastic and well stretching material. When fixing polyethylene foam rolls on the metal covering of the frameless construction, they will change their shape together with the metal due to the climatic temperature drops (stretch and constrict). The performed tests have revealed that the longitudinal tensile strength of the products with a metallized coating is 80–92 kPa, without a metallized coating - 80–87 kPa, and 29–32 kPa of the weld seam.
The article includes information regarding the results of thermal imaging monitoring of frameless constructions with an insulating coating based on polyethylene foam. It is shown that hot-air welding (with the help of a hot air gun) allows minimizing heat losses both at the joints of the sheets and in the areas adjoining to the base and to the side walls of the buildings.
Application of Nickel Tablets in Hot-Dip Galvanizing for Silicon and Phosphorus Steel Reactivity Control
Authors: Bondareva O.S. , Turovsky A.M. , Turovsky Y.M.
Published: May 2020

Alloying zinc melt with nickel is used to control the thickness of the zinc coating on steels with different contents of silicon and phosphorus. Nickel is involved in the formation of iron-zinc phases in the coating and inhibits their growth. The use of zinc-nickel master alloys is well studied and has a significant disadvantage - the significant wastage of nickel in the bottom dross. The application of nickel tablets avoids wastage, because it allows us to distribute nickel evenly throughout the bath volume. The aim of this work was to determine the working concentration of nickel introduced into the melt from nickel tablets for a wide range of silicon-containing steels and for a galvanizing time of 2-5 minutes. It was found that the nickel concentration of 0.04% leads to the coating thickness decrease and normalization of the variation in coating thickness on steels with a silicon equivalent SiEV 0.12-0.28% at the galvanizing time of 2-5 minutes, and on high-silicon steel (SiEV 0.75%) at the holding time of 3 minutes. A nickel concentration of 0.03% is effective for SiEV steels 0.12-0.18% with a galvanizing time of 2-3 minutes. "Sandeline Peak" is completely smoothed out with a holding time of 3-5 minutes in the melt with a Ni content of 0.05%. The nickel presence in the zinc melt modifies the ζ-phase structure in the coating, making it more dense and uniform in thickness.
Research on Anticorrosive Effects of Larch Bark Extract with Addition of Collagen
Authors: Kuzmina I.E. , Fedorova A.I.
Published: May 2020

The results of the study of the anticorrosive protective effects of the larch bark extract with addition of collagen have been given in this article. It was found that the best way of water extraction of tannins from larch bark is a temperature of 60 ° C during 1 hour, since at high temperatures, partial destruction of tannins occurs, and with an increase in the extraction time of more than an hour, the process of adsorption of these substances by the bark takes place. The corrosion rate was determined by the intensity of the blue colour of the complex compound of iron (II) cations - the truncul blue Fe3[Fe (CN)6]2 on a photocolorimeter with a yellow light filter at a wavelength of 590 nm. The average corrosion rate was calculated by the concentration of the resulting Fe2+ cations (within 1 minute). Based on the average corrosion rates, the protective effect of the extract (Z) and the drag coefficient (γ) were determined. It has been identified that the protective effect of the larch bark extract is equal to 37.5%, while addition of collagen leads to 2.3 time increase of protective effects of the extract. This can be explained by the fact that, with collagen additive, good adhesion of tannins to the surface of iron occurs resulting from formation of complex compounds, and a protective collagen film is formed, preventing an access of oxidizing agents to the metal surface.
The Influence of Physicochemical and Structural Properties of Polymetallorganosiloxanes on their Tribotechnical Characteristics
Authors: Shapkin Nikolai P. , Leontiev L.B. , Khal'chenko I.G. , Makarov V.N.
Published: May 2020

The effect of molecular structure and physicochemical parameters of polymetalphenylsiloxanes in a solid state on their tribotechnical properties has been investigated. Characteristics of polymetalphenylsiloxanes (PMPS) have been determined by means of physicochemical methods. Inner structure of a solid phase of PMPS has been examined by means of positron annihilation spectroscopy (PAS). Minimal sizes of ordered (matrix) and disordered (voids) regions were calculated based on the obtained PAS data. Specific polarizing potentials responsible for the stability of PMPS spherical particles have been calculated based on physicochemical parameters.
Spark Plasma Sintering of SiC Ceramics Based on Natural Renewable Raw Materials
Authors: Zavjalov A. , Shapkin Nikolai P. , Papynov Evgenii K.
Published: May 2020

The paper presents the results of obtaining silicon carbide SiC ceramic from organic raw materials by the reaction spark plasma sintering (SPS). Annealed rice husks are used as an organic raw material. A feature of the batch preparation for sintering is annealing in an inert atmosphere. Thus, the carbon source C for further reaction with silicon dioxide SiO2 to form SiC is the organic part of the rice husk. This way let to achieve the most uniform reacting components mixing directly at the stage of annealing the husks and to exclude the mixing stage from the technological process. The reaction SPS method was used for the first time for the production of ceramic material from such a raw material. The results of a comprehensive study of the obtained material by various methods are presented in the article: scanning electron microscopy, Raman spectroscopy, X-ray phase analysis, strength analysis, and others.
Dry Adhesive Friction Process Regularities during Frictional Contact of Heterogeneous “Copper-Aluminum” System Materials
Authors: Kalashnikova T.A. , Chumaevskii Andrey V. , Gusarova A.V.
Published: May 2020

By means of optical and scanning electron microscopy the surface layer structure of aluminum alloy AMg5 samples with introduced copper part after adhesive frictional contact with AISI 420 steel counterbody was studied. It is revealed that under plastic deformation and material fragmentation in the frictional contact zone a complex mixture of different phase layers is formed due to the formation of different flows of aluminum alloy and copper during friction. Mechanical mixing of a material occurs on all length of a friction path with different intensity depending on distance to copper fragment. Both laminar and turbulent flows of material are formed in the surface layer, as well as a wide range of solid solutions, intermetallic phases and mechanical mixtures.
Study of the Transport Loads Influence on the Nature of Belite Sludge Hardening in Pavement
Authors: Lytkin A.A.
Published: May 2020

The article describes the characteristics of belite sludge - large-tonnage waste of the aluminium industry. The ability of the sludge and sludge-rubbing materials to restore the damaged structure after re-compaction has been revealed. The influence of multiple transport loads on the nature of the sludge hardening and slurry materials in structural layers on an annular test bench under full-scale conditions has been investigated. It has been established that mobile loads have a positive effect on the nature of the hardening of these materials. After 20 months of operation, the strength of the sludge and sludge material on the sections under movement is 13.0% and 33.8% higher compared with the materials of the control sections. Consequently, there is no need to close the traffic immediately after the construction of pavement layers using sludge. In addition, it is not necessary to regulate the time after which the installation of a coating on a slurry base is allowed.
Research of Physical and Chemical Properties of Powder Cellulose from Various Type of Raw Materials
Authors: Momzyakova K.S. , Deberdeev T.R. , Valishina Z.T. , Deberdeev R.Ya. , Ibragimov A.V. , Alexandrov A.V.
Published: May 2020

The features of obtaining powder cellulose from non-woody plant materials, excluding the stages of acid and / or enzymatic hydrolysis using the original technological approach at atmospheric pressure and temperature, were studied 90-100 degree of Celsius. The feedstock after alkaline treatment, according to the proposed technology, is subjected to physico-chemical activation using a modified extrusion unit, providing intensive grinding and defibrillation of the fibers, washing, drying, grinding on a hammer mill. Physicochemical and structural studies of the obtained powder pulp from lucerne, oat straw and cotton powder pulp were carried out. The efficiency and prospects of the proposed process are shown.
Evaporation Rate Management Using Substrates with Graphene Nanoflakes Coating
Authors: Dmitriev A.S. , Ivlev N.F. , Makarov Petr G.
Published: May 2020

This work is devoted to finding of a solution of the actual problem of modern solar power engineering that consists in incomplete conversion of the Planck spectrum of solar radiation using photoelectric conversion. Concentrated solar power being an alternative faces other limiting features such as high cost of building and maintenance, large areas occupied by these plants, the need of precise adjustment of mirrors-lenses systems and also its detrimental effect on nature, birds in particular. An intensification of vaporization from the surface of water can become a solution. In this work a thin layer made of graphene nanoflakes was used as an absorbing media for solar radiation that intensifies evaporation. Also it acts as a catalyst for transmission of water through porous substrate that was made of wood. Results for these experiments were compared with evaporation from free surface. The possibility of using of these porous substrates for the purpose of desalting and purifying water was also experimentally studied.
Criteria of Mora-Coulomb with Three Parameters of Material
Authors: Aleksandrov A.S. , Dolgih G.V. , Kalinin A.L.
Published: May 2020

A modified Mohr – Coulomb criterion is presented. This criterion, in addition to adhesion and the angle of internal friction, contains the third parameter of the material (d). Depending on the value of this parameter (d), the modified criterion can take the form of the original Mohr – Coulomb criterion (with d = 0.5) or the original Treska criterion (with d = 0). For all other values of the parameter (d), varying in the range of 0 <d <0.5, the tangential stresses by the modified criterion are larger than the Mohr – Coulomb criterion, but less than the Tresca criterion. The paper presents the methodology and results of determining this parameter (d) using experiments on the triaxial compression of soils. The technique contains recommendations for the appointment the value of the axial strain of the sample material when determining the value of the parameter d. The value of the ultimate deformation is advisable to take in the range from 8 to 12%. This range is due to the fact that with axial deformation of the sample of 8%, the formation of slip areas begins in it, and with axial deformation of the sample 12%, the slip area is completely formed. In this case, the parameter d varies in the range 0 <d <0.5, having a shear strength bigger than in the Tresca criterion, but less than in the original Mohr – Coulomb criterion. The tangential stresses according to the modified criterion, on the contrary, have a bigger value than according to the Mohr – Coulomb criterion, but the values of the tangential stresses are lower than in the Tresca criterion.
Computer Modelling when Selecting the Activated Mineral Powders Compositions
Authors: Galdina V.D. , Galdin N.S.
Published: May 2020

When selecting the compositions and studying the properties of the activated mineral powders based on superacid fly ash, mineral and organic activating agents, the computer modelling was performed. The activated mineral powders compositions corresponding to the properties of GOST 32761 2014 requirements to the MP-1 activated mineral powders of carbonate rocks were selected using the experiment mathematical planning method. When processing the experimental data for obtaining the adequate mathematical model, optimizing the compositions and constructing the graphical dependencies, the Maple package was used. The software for the personal computer including the algorithm and se-lection program of the activated mineral powders compositions was developed. The software makes it possible to automate the calculation of the activated mineral powders formulas with the specified technical properties.
Modeling of the Rheological and Thermophysical Properties of Food Materials when Frying in a Deep Fryer
Authors: Gaysin I.A. , Samigullin A.D. , Israfilov Irek H.
Published: May 2020

The deep-frying is one of the most widespread technologies for the production of culinary products and one of the foundations of the global food industry. In this connection, the researchers are faced with the continuous task of stable improve product quality, thermal efficiency and operating characteristics of equipment which, including, can be solved by increasing the precision of setting the thermal regime of heating the frying oil. In turn, the thermal mode of heating the frying oil directly affects its quality and the quality of the final product. It is known that for some media the macroscopic state at a given time depends on their state at earlier time (the phenomenon of memory). These work deals with the modeling of thermophysical processes in frying oil on the basis of the theory of materials with memory are considered. The influence of the oil degradation degree on the changes in its viscosity and convective heat transfer coefficient is shown. As a result of the analysis of the data, formulas for the corresponding corrections are derived. The conclusion is drawn that for the management of the quality of food requires data analysis when developing a mathematical model of the process.
The Effectiveness of Using Bitumen Emulsion in the Technology of Dedusting Roads with a Transitional Type of Coating
Authors: Burenina O.N. , Savvinova M.E. , Andreeva A.V.
Published: May 2020

The article considers the effectiveness of using bitumen emulsion in technologies for dedusting sections of the Vilyui A-331 federal highway. The sections allocated for the work have transitional coatings of sand and gravel (crushed stone), crushed stone sand and gravel mixtures. Their wear degree is up to 100% and they belong to dust-forming and highly dusting ones. The average traffic intensity on Vilyui A-331 highway is 937 units per day. The efficiency of technologies for dedusting coatings of transitional type has been evaluated and the prospects of using cationic bitumen emulsions for these purposes have been shown.
Dynamics of Plane Waves in a Semi-Bounded Electro-Magneto-Elastic Medium
Authors: Levi M.O.
Published: May 2020

The problem of harmonic oscillations in electro-electromagnetic composites is studied. Oscillations can be initiated by the extended load vector, including the horizontal and vertical components of mechanical displacements, and electrical induction distributed on top of the surface. Boundary conditions assume full mechanical coupling for all layers of the structure. Electrical conditions on the surface top can be both electrically open, and electrically shorted. Magnetic conditions are similar to electric ones and describe the continuity of fields in between two mediums, or indicate the isolation of the magnetic field between them. The Green's function of electro–magneto–elastic medium is constructed. Phase velocities are obtained for various geometric proportions and materials.
Physico-Chemical Foundations and Practical Significance of Unification of Metallic and Nonmetallic Substances and Materials within a Unified Model of Chemical Bond
Authors: Sirotkin R.O. , Sirotkin O.S.
Published: May 2020

In the present work, in the framework of solving the problem of obtaining a new generation of materials with a set of properties not inherent in traditional metal and non-metal types, the practical necessity of developing a unified approach to designing their structure and properties is substantiated. Within the framework of the paradigm of multi-level structural organization of materials, based on a single model of chemical bonding, a generalization of physicochemical prrinciples was carried out, revealing the unity of nature and the causes of differences in the structure and properties of metallic and non-metallic substances and materials. Through the effects of the ratio of the components of the chemical homo - or heteronuclear interaction of the elements of the fine microstructure of substances and materials on the differences in subsequent levels of the structure (molecular and non-molecular, etc.) and properties (conductor-dielectric, ductile, elastic or fragile and hard, etc.) of metals and nonmetals the practical significance of the scientific approach developed in the work was shown.
Laser Conoscopy of Optically Active Crystals
Authors: Pikoul O.
Published: May 2020

The article discusses a laser conoscopic method for studying optically active crystals in order to determine such optical characteristics as the sign of rotation of the polarization plane and the optical sign of an optically active crystal from its interference conoscopic pattern obtained with circularly polarized radiation. Such a conoscopic pattern in the form of two spirals inserted into each other allows one to simultaneously and reliably determine the indicated characteristics by the orientation of the spirals and the direction of their twisting for an optically active crystal.
Non-commutative crepant resolutions for some toric singularities. II
Authors: Špenko Špela , Van den Bergh Michel
Published: May 2020

Using the theory of dimer models Broomhead proved that every 3-dimensional Gorenstein affine toric variety Spec

R

admits a toric non-commutative crepant resolution (NCCR). We give an alternative proof of this result by constructing a tilting bundle on a (stacky) crepant resolution of Spec

R

using standard toric methods. Our proof does not use dimer models.
Comment les vétérinaires communiqueront-ils demain? Tendances pour les praticiens et pour la profession
Authors: Thébaud Emmannuel
Published: May 2020

How will veterinarians communicate tomorrow ? Tendencies for practitioners and veterinary profession.

French veterinarians are now allowed by the Code of ethics to communicate more. This important change for the profession comes at the same time as a massive transformation of global corporate and institutional communication driven by the internet. Two major new concepts seem to apply to veterinary communication, customer experience and human to human. Now, pet owners expect veterinarians to offer them not only an efficient service, but also a positive overall emotional experience that extends to all real or virtual contacts upstream and downstream of the veterinary consultation. To meet this challenge, the concept of a personalized communication, centered on the human relation, from human to human, seems to impose itself. Like veterinarian companies, professional institutions and associations face the same challenges, which require the same solutions.
Évolution et perspectives de la santé publique vétérinaire en Italie
Authors: Marabelli Romano
Published: May 2020

Evolution and outlook of veterinary public health in Italy.

Since their origin the Italian veterinary services have always given particular importance to public health and safety. Born after the unification of Italy in 1861, they were officially recognized in 1865 and assigned to the Ministry of the Interior with a connotation and tasks of public safety. After the Second World War a High Commissariat was established which ensured the transition until the creation of the Ministry of Health in 1958. Since 1978, with the establishment of the National Health Service, veterinary activities have left the Ministry of the Interior’s Police competences to assume complete autonomy in the Ministry of Health. It is however clear that the imprint of a century has left Italian veterinarians with the awareness of being, above all, part of a national security system. Currently there is a strong generational renewal of the Italian veterinary class both centrally and in the territory that requires careful consideration of the most suitable organization model for the future.
Intérêts des techniques de modifications ciblées du génome («genome editing») chez les animaux de rente
Authors: Pailhoux Eric , Vilotte Jean-Luc
Published: May 2020

Des nouvelles nucléases permettent de modifier le génome de nombreuses espèces de façon ciblée ; à un endroit précis et défini dudit génome. Concernant les animaux de rente, les applications envisagées peuvent se classer dans trois grandes perspectives : (i) les projets à visée de recherche fondamentale, lorsque l’espèce murine ne peut pas être utilisée (cornage, saisonnalité, à titre d’exemples) ; (ii) les projets à visée biomédicale pour créer des animaux modèles de pathologies humaines quand le modèle murin n’est pas adéquat ; et (iii) les projets à visée agronomique pour apporter un caractère favorable, décrit dans une autre espèce ou race, à une race ou une espèce ne possédant pas ce caractère. Ces techniques représentent une alternative très efficace à l’introgression, tout en abolissant la barrière d’espèce. Elles pourront également être envisagées en appui à la sélection génomique pour éliminer les allèles défavorables lorsque leur utilisation sera autorisée en Europe, ce qui n’est pas encore le cas.
La période préimplantatoire du développement des mammifères: la souris est-elle un bon modèle ?
Authors: Duranthon Véronique
Published: May 2020

Preimplantation development in mammals : how relevant is the mouse model ?

Knowledge of the molecular and cellular events of the early stages of mammalian embryo development is essential for biomedical research. The mechanisms involved, sometimes very specific to this period, are also the subject of much basic research. The mouse has long been used as a unique model for the analysis of these stages of development. Its features and the tools available to study it make it a very interesting model, but it is insufficient to represent all mammals and in particular the human embryo.
La morsure des mustélidés : données sur l’anatomie, l’éthologie et la pathologie
Authors: Cabrit Nicolas
Published: May 2020

Mustelids’ bite : anatomical, ethological and pathological data.

Mustelids live in almost all land-based ecosystems, on plains, in the mountains, in deserts or on the coast. Each one of them has specificities. However their bite is powerful compared to their small size which makes their restraint a dangerous threat. The scientific literature on the topic is summed up in this article. The anatomical study of mustelids’ skulls shows us why their teeth and musculoskeletal system can cause severe wounds. In regard to their several feeding behaviors, major variations exist despite their common jaw-closing strength. Understanding their behavior allows us appraise the part of the bite within their species or with their environment. As some mustelids are closed to humans, foreseeing handling accidents is necessarily through understanding their behavior, their living spaces shifts and captivity, though there is a clear difference between pet mustelids that can learn on biting and wild mustelids that should not change their behavior. Once biting happened, first trauma is taken over so as to minimize the injury extent. Then infectious side should be considered. On one hand, commensal microorganisms and especially Pasteurella should be treated. On the other hand, regarding to the kind and geographic origin of the mustelid that bite, other public health infectious risks should be considered (rabies, mycobacteriosis, streptobacillosis, tetanus …).
Un cas d’amyloïdose généralisée chez un cheval
Authors: Linster Maud , Laloy Eve , Audigie Fabrice , Foucher Nathalie , Tapprest Jackie , Cordonnier-Lefort Nathalie
Published: May 2020

Les amyloïdoses sont un groupe de maladies dont la caractéristique commune est le dépôt d’une substance amyloïde dans le milieu extracellulaire. L’amyloïdose est le plus souvent de type AA ou AL selon le type de protéine à l’origine du dépôt (respectivement la protéine SAA ou les chaînes légères des immunoglobulines). On distingue des formes généralisées et localisées d’amyloïdose en fonction de la distribution de la substance dans les tissus ou organes. Les formes généralisées, les plus courantes chez le cheval, sont les amyloïdoses de type AA dont l’évolution est secondaire à un processus inflammatoire chronique. Les formes localisées chez le cheval sont quant à elles plus souvent de type AL. Nous présentons ici un cas original d’amyloïdose généralisée, probablement de type AA, diagnostiqué à l’autopsie, secondaire à un processus infectieux chronique sous-cutané et osseux.
Standard for Refrigerant Risk Analysis for Mobile Air Conditioning Systems
Authors:   Interior Climate Control Vehicle OEM Committee
Published: May 2020

This SAE Standard describes methods to understand the risks associated with vehicle mobile air conditioning (MAC) systems in all aspects of a vehicle’s lifecycle including design, production, assembly, operation, and end of life. Information for input to the risk assessment is provided in the appendices of this document. This information should not be considered to be complete, but only a reference of some of the data needed for a complete analysis of the risk associated with the use of refrigerants in MAC systems.
Confucian Post-Liberalism
Authors: Carleo III Robert Anthony
Published: May 2020

This paper reviews parallel attacks on the ethical basis of liberal principles from within and without that tradition, one the Confucian-Kantian perspective of contemporary philosopher Li Zehou 李澤厚 and the other the un-Kantian “post-liberalism” of John Gray. Both reject foundational claims regarding the universality of liberal values and principles while still affirming the universal value of those principles via their practical function in fostering for human flourishing. I point out that Gray’s anti-foundationalist liberalism not only aligns with the Confucian elements of Li Zehou’s theory, but may even be enriched by them.
Imprints of the Thing in Itself: Li Zehou’s Critique of Critical Philosophy and the Historicization of the Transcendental
Authors: Van den Stock Ady
Published: May 2020

Kant’s concept of the “thing in itself” constitutes a formidable challenge to the project of “(anthropological-)historical ontology” with which the name of Li Zehou has become synonymous. Li’s radical reinterpretation of Kant’s critical philosophy, which locates the conditions of the possibility of knowledge and experience within historical and social evolution and thus seeks to allow for a form of human self-determination, brings us face to face with the close relation between the epistemological/ontological and normative dimensions of the notion of the thing in itself. My paper attempts to tease out some of the conceptual presuppositions and repercussions of Li’s approach to the thing in itself in the Critique of Critical Philosophy (Pipan zhexue zhi pipan 批判哲学之批判), while locating his reading in the broader context of Kant’s transcendentalism.
Li Zehou’s Ethics and the Structure of Confucian Pragmatic Reason
Authors: Rošker Jana S.
Published: May 2020

Li Zehou believes that human psychology, just like humanness or “human nature”, is not fixed or given, but is rather something characterized by changing developmental forms of human pragmatic reason, which is formed over millions of years, and is still continuously accumulating and changing. However, reason alone is by no means something that would absolutely separate humans from their sensuality and thus from other animals. The difference between human beings and animals primarily occurs somewhere else, namely in the very realm of the specifically human social existence, which is defined by “subjectality” (zhutixing 主體性) and includes specific human values. In this context, Li shows that Confucian pragmatic reason is formed and functions within the “emotio-rational formation” (qingli jiegou 情理結構), which is deeply rooted in the human world. It is based on actual human conditions and arises from human social emotionality, transforming these culturally integrated general communal emotions through rites in the process of “condensation of reason” (lixing ningju 理性凝聚) into rational concepts of right and wrong, good and evil. The rationality of these concepts governs the subjective personal feelings of each member of a community; the pragmatic nature of this rationality, however, is tightly linked to and intertwined with human emotions. In the concrete social life, these rational concepts can nevertheless dissolve—through the process of the “melting of reason” (lixing ronghua 理性融化)––in the heart-minds of people and thus become an integral part of individual emotions. This paper aims to posit the Confucian pragmatic reason into the framework of Li Zehou’s ethics and political axiology.
Different Approaches to Modern Art and Society: Li Zehou versus Xu Fuguan
Authors: Sernelj Téa
Published: May 2020

Proceeding from the inseparable relation between ethics and aesthetics in traditional (and often also modern) Chinese thought, this article aims to illuminate two important approaches to the aesthetic foundations of Chinese modernity. The relation between the individual and society, which is a core question of modern ethics, is reflected in most of the ethical theories of 20th century China. In this context, the article first presents Li Zehou’s theory of aesthetics and his definition of aesthetic experience. In this way, it aims to illuminate Li’s interpretation of modern art and society, and to posit it into a contrastive position to Xu Fuguan’s ethico-aesthetic theories, especially the ones regarding modernity and Western culture. The basic approaches applied by these two important modern Chinese scholars reveal great differences in attitude towards the spiritual and material development of humanity in the 20th century, which is especially interesting since they are both rooted in the abovementioned belief that ethics cannot be separated from aesthetics. Besides, Li Zehou sincerely admired Xu Fuguan’s work on traditional Chinese aesthetics and referred to his comprehension of general concepts of traditional Chinese aesthetics in many of his own works dealing with aesthetics.
Using Dewey's Conception of Democracy to Problematize the Notion of Disability in Public Education
Authors: Mullins Ricky Dale
Published: May 2020

In this paper I examine ways in which students with disabilities have the capacity to be full, contributing citizens within a participatory, communicative, and pluralistic democracy. In many instances, institutions such as schools provide barriers that disallow and dissuade students with disabilities from full participation in society and their education, which  prevents them from becoming co-creators of their educational experience. I argue that in a Deweyan democracy, all students must have not just the right, but be allowed to grow in their capacity to develop into fully participating, contributing citizens. My hope is that by situating disability and special education within the Deweyan democratic discourse it will be possible to render that discourse more genuinely inclusive of all students, so that the needs of all are met and the unique contributions of each become a part of the educational process.
The Politics of Culture
Authors: Strunc Abbie
Published: May 2020

Using Van Dijk’s sociocognitive theory as a framework for discourse analysis, the state-mandated standards were examined to determine how the educational culture is impacted by the social studies curriculum. The process to revise the curriculum in Texas is highly politicized and outside interest groups, such as Mel and Norma Gabler’s Educational Research Analysts, have inserted their own cultural perspective over the last 50 years. The article considers the impact of this influence and discusses the norms and power structures produced.

            Keywords: discourse analysis, social studies, Texas, culture
The Challenge with Educational Transformation
Authors: Etherington Matthew
Published: May 2020

The digital culture is a challenge for a sustainable future because it adopts the same values embraced by proponents of the Industrial Period of the 18th century. The digital culture, in the same way as the industrial culture, promote the values of consumerism, progress, change, innovation and individualism, all of which contribute to a decline in the conversations, and collaborative problem solving that comprise the pool of collective ideas and sources of intergenerational knowledge of local self-sustaining communities.. In order for this conversation to begin, educators must first engage themselves in understanding the metaphors that are carried forward by words such as progress, change, innovation and individualism and the advantages of encouraging the revitilaztion of the local cultural commons.
Incorporating Digital Technology in the General Education Classroom
Authors: Solas Eddia , Sutton Frances
Published: May 2020

The implementation of technology-based pedagogic practices is becoming increasingly significant in higher education as the admission of digital natives increase. This generation of students, so defined as digital natives because they grew up using computers, tablets, smart phones and other digital technology, show a high level of technological competence, but exhibit deficiencies in competencies related to digital academic tools.

 A group of activities which supports learning, and facilitates student academic success, were compiled in a 28-item challenge for beginning General Education students, as a part of a Life and Study Skills course. Each challenge invited students to access some aspect of digital technology which has the potential to increase their academic competence. The main aim of the exercise was to increase studentsâ€™ digital academic literacy, exposing them to applications and ICT skills which would increase their efficiency, self-efficacy and accuracy in executing academic tasks. The technology tools used were aimed at accomplishing tasks such as group formation and communication, notetaking, information capture, summarization, synchronous and asynchronous collaboration on tasks, referencing, formatting, grammar check, plagiarism and assessment.

Students were challenged to complete particular tasks using specific applications. A screenshot of each completed activity was submitted as evidence of task completion. Students were given 28 days to complete the tasks, after which they were required to do two quizzes, using learning platforms they were exposed to in the challenge, demonstrating their new found proficiencies.
Preparing teachers for the use of digital technologies in their teaching practice
Authors: Dagdilelis Vasileios
Published: May 2020

Greece these last 15 years has developed and implemented a large-scale system for the integration of digital technologies in education and more specifically in the teaching practice. "Large-scale" means that the whole program concerns all Greek education system. A very important part of this nationwide project is the training of teachers program that involves practically all Greek teachers - so far more than 120,000 teachers have been involved and soon they will be involved all of them (approximately 150.000). In this paper we present a summary of this plan. The monitoring of this project at national level, almost from its very beginning, gave to us the opportunity of collecting a large volume of raw information and data of both quantitative and qualitative nature.