bluuebunny/crossref_metadata_2025 huggingface dataset:
The Increase of Hydration Activity of Portland Cement by Additives of Crystalline Hydrates
Authors: Krivoborodov Yury R. , Samchenko Svetlana V.
Published: December 2019

The article presents the results of a study of the effect of synthesized microdisperse additives of crystalline hydrates based on calcium sulfoaluminates on the properties of cement stone. The effectiveness of the use of a rotary pulsation apparatus (RPA) to obtain microdispersed additives is identified. The possibility of accelerating the hardening of cement stone by entering microdispersed additives into its composition is shown. It has been established that in the presence of microdispersed additives of crystalline hydrates in the cement stone, the phase composition of hydrate tumors changes, the amount of calcium hydrosilicates and ettringite increases, the porosity decreases and the strength of the cement stone increases. This provision is confirmed by the increase in the degree of cement hydration, the amount of bound water in all periods of hardening of the stone. It is proposed to use microdisperse additives, which play the role of primers for the crystallization of ettringite and calcium hydrosilicates, to increase the strength of cement stone in the early stages of hardening.
Developing of Technology for Production of Perlite Based Insulation New Material and Elaborating of Methods for Calculation and Design of Damp Thermal Insulation Drying System
Authors: Melikyan Zohrab , Egnatosyan Naira , Egnatosyan Siranush
Published: December 2019

During last 20-25 years in Armenia has been established new thermal insulation material’s production. This program in short is named “Developing of perlite insulation technology”. The perlite is a volcanic mineral in form of soft stone, which is extracted from perlite mines of Armenia. First of all, the perlite is a construction material, which traditionally has been used in building construction purposes. At the same time, it is a good row material for making thermal insulation goods. The technology of transformation of perlite stone into perlite insulation material is developed by Professor Zohrab Melikyan jointly with experts of “Yerevan Perlite Company” in the framework of the program “Development of Environmentally Safe, cost Effective and Sustainable Energy Sector of Armenia in the Situation of Shutting Down of the Armenian Nuclear Power Plant”. The project was targeted to compensate the energy deficit that could arise in Armenia, following to shutting down of the Nuclear Power Plant (ANPP).
Technical Capabilities of Concrete and its Structure Defects
Authors: Suleymanova Ludmila A.
Published: December 2019

Theoretical and experimental materials for analyzing the technical capabilities of concrete are generalized and the physicochemical basis for the strength and durability of concrete is developed on the basis of the recent advances in building materials science and other sciences. That may increase the traditional concrete potential use and most importantly – to create the most firm and durable concrete of the new generation.
Modification of Concrete with Polymer Additives Based on Secondary Resources
Authors: Evstafyeva Natalya , Stefanenko Igor , Akchurin Talgat
Published: December 2019

Creation of new efficient composite materials and the technologies of their manufacturing are inseparably coupled with corrosion protection of cement stone, which allows preserving construction products from fracture and ensuring their long service life. The development of new compositions of composite materials based on the industrial wastes from regional enterprises and aimed at the corrosion protection of construction products and structures is an urgent task for construction and technology professionals. A filled two-component polymer system (FTPS) for complex protection of construction materials and structures against moister and aggressive environments, which is based on secondary polymer and mineral raw materials, exhibits impregnating properties and can be used as a polymer additive to cement binding matter. The new mineral-polymer binder significantly changes the properties of the resulting material providing it with corrosion-resistance. The introduction of the FTPS polymer component in addition to the main mineral binder (cement) into the composition of concrete mix will allow changing the properties of concrete compositions through the modelling of their internal structure.
Mathematical Simulation of Bottom Ash Effect and Expanded Polystyrene on the Polystyrene Concrete Properties
Authors: Van Lam Tang , Kim Dien Vu , Bulgakov Boris I. , Bazhenova Sofia I.
Published: December 2019

Nowadays various light concrete types have many advantages as compared to heavyweight concrete (total structures mass decrease, increased thermophysical properties, less material consumption). Various industrial wastes use such as fly ashes, slag and bottom ash was suggested to enhance the light concretes effectiveness. This is greatly important for a green light concrete production since it is very important to obtain new types of environmentally friendly materials using wastes. The article substantiates the light concrete use and creation with organo-mineral additives based on industrial waste, analysis of the second-order mathematical model describing the bottom ash (BA) amount effect of Vung Ang TPP and expandable polystyrene spheres (EPS) on the light concrete density and compressive strength at the age of 28 days of normal hardening is done. In this work, the BA and EPS amounts varied from 14.5 to 45.5%, respectively, of the cement weight and from 24.5 to 55.5% of the concrete mix volume. The effect of expanded polystyrene spheres (EPS) and bottom ash (BA) TPP "Vung Ang" amounts as the input parameters on the polystyrene concrete properties (PCP) were investigated in this study. On the one hand, various proportions of BA (14.5, 20, 30, 40 and 45.5%) were blended in concrete mixes as partial weight replacement for Portland cement. On the other hand, EPS amount was replaced by the fresh concrete volume in the range from 24.5% to 55.5%. Additionally, the central composite design method of Box-Wilson for second order factors was used to predict the EPS and BA effects on the polystyrene concrete properties. The results showed that the proposed regression equations of this mathematical model achieved an adequate prediction accuracy. Hence, the effects of both bottom ash contents and expanded polystyrene spheres on the dry density and 28-day compressive strength of the PSC-specimens were significant. In the future, further investigations have to be carried out to study the quality prediction of green light concrete containing various wastes.
The Raw Building Materials’ Research Quantitative Characteristics Radioactivity in Volgograd Region
Authors: Mikhnev Ilya P. , Mikhneva Svetlana V. , Salnikova Natalia A. , Lempert Lev B.
Published: December 2019

The paper attempts to structure the raw materials for radioactivity using Kohonen self-organizing maps. The analysis was carried out on the data on the specific activities of natural radionuclides in the construction raw materials in the Volgograd region, as well as on the natural radionuclides specific effective activities calculated values. Unlike the traditional methods of analysis, the used methodology for assessing radioactivity is based on quantitative characteristics. As a result of the network training on data on the raw materials specific activities, a cluster map with segmentation by the natural radionuclides effective specific activity has been obtained. Based on the results obtained, the conclusions about the possibility and feasibility of using the algorithm used for the classification and analysis of data on the building materials radioactivity have been made.
Aerated Concrete Based on Cullet and Liquid Glass
Authors: Samchenko Svetlana V. , Aleksandrova Olga V. , Zaitseva Anna A.
Published: December 2019

The possibility of using technical glasswork with liquid glass to produce aerated concrete using low-energy technology was considered in the paper. The unsorted technical glass cullet use as a part of aerated concrete will allow the non-decomposing industrial wastes disposal, which makes it possible to speak about the environmental technology development, while reducing the cost of producing effective heat-insulating materials considers its economic efficiency. The optimum liquid glass density was established upon aerated concrete mix receipt, which should be at least 1.23 and not more than 1.35 g / cm3. The technical characteristics of aerated concrete based on cullet and liquid glass obtained in this work are determined. Thermal conductivity of aerated concrete with its density of 150-400 kg / m3 is 0.06 W/m°C. The resulting aerated concrete is recommended for thermal insulation of pipelines both during construction and during their repair.
Study of the Influence of Thin-Dispersed Powders on the Structuring Ability of Stabilizing Additives
Authors: Trautvain A.I. , Yadykina V.V. , Tobolenko S.S.
Published: December 2019

The article presents the results of the study of the bitumen-retaining ability of stabilizing additives developed on the basis of cellulose-paper waste and finely dispersed fillers of various genesis. Analysis of the test results of crushed stone-mastic asphalt mixtures of the same composition showed that all additives provide the value of the runoff index of the organic binder in the mixture, which meets the requirement of the State Educational Standard No. 31015-2002. The introduction of mineral fillers into the stabilizer contributes to a decrease in the studied parameter, which is due to the additional structuring effect. For a two-component additive (without mineral filler), the studied indicator has the greatest value, exceeding the recommended limit. It is important to note that the use of mineral powder in the composition of stabilizing additives has a positive effect on the flow of the binder. Mineral powder, due to the structuring effect on bitumen and the formation of a microporous structure, reduces the run-off rate of the binder. This is due to the fact that bitumen, being in thin interlayers and small pores, falls into the region of influence of the molecules of the surface layer of the mineral part, increasing the density of granules and facilitating the granulation process of the additive. The minimum runoff of the organic binder is observed in the preparation of crushed stone-mastic asphalt-concrete mix with additives based on mechanically activated wastes of wet magnetic separation of ferruginous quartzites and is 0.07.
Heat Resistant Light Solutions on the Activated Composite Binder from the Local Mineral Raw Materials
Authors: Khadzhishalapov G.N. , Hajiyev Abdulla M. , Khezhev T.A. , Alimuradov Shakhmurad A.
Published: December 2019

One of the heat-resistant solutions effective application areas is to protect the structures from the high temperatures’ effects in case of fire. Material damage from fires amounts to hundreds millions of rubles. An effective way to improve the fire resistance of the building structures is to apply heat-insulating coatings to the surface. One of the compositions to protect the structures from high temperatures is a heat-resistant solution based on the expanded clay sand and perlite. The effectiveness of the solutions application to protect against high temperatures exposure increases due to the fact that these solutions perform both thermal and decorative functions. In the field of conventional building structures protection from the high temperatures effects, the extensive studies have been carried out by such scientists such as [6,7,8,9,32,10], and the solutions that simultaneously perform the decorative functions and the functions of protection against the effects of high temperatures in the event of fire have been little studied except for the usual restoration solutions. The study of the solutions’ special properties for the protection of small architectural structures such as fire resistance, thermal conductivity and linear thermal expansion coefficient is a rather important task.
Composite Material Based on Plant Raw Materials
Authors: Khadykina E.A. , Meretukov Z.A.
Published: December 2019

Modern global trends show the preferred low-rise construction, even in large cities. Lightweight concrete is the most common material for low-rise construction. Existing lightweight concrete with the wood residues addition have several disadvantages due to the properties of the aggregate. In the southern regions of Russia, walnut grows in large quantities. Only a small part of the shell is processed, the rest is buried in the ground or burned. The proposed aggregate from crushed walnut shell has several advantages compared to the traditional natural organic fillers: low water demand and decay, high strength. The nutshell in the composition has sugars, which are the cement poisons, there are no data in the literature on the crushed shell technical characteristics. Thus, it is required to determine the crushed shell technical characteristics, to choose a processing method reducing the water-soluble sugars amount in the shell, to select the lightweight concrete composition, ensuring its optimal characteristics. The new kind of lightweight concrete will have characteristics different from existing analogues.
Preconditions of Creation of Self-Adhesive Elastic Radiation Shielding Coverings
Authors: Cherkasov D.V. , Avdonin V.V. , Yurkin Y.V.
Published: December 2019

Results of scientific researches in the field of creation of self-adhesive radiation shielding materials on the basis of polymers are presented in this article. It is stated, that radiation shielding coverings on the basis of ethylene propylene rubber are more preferable than coverings on the basis of BSR and SBS. Materials on the basis of ethylene propylene rubber possess high hardness at scaling from metal (more than 600 N/m) and hardness at breakoff from concrete (more than 0,1 MPa), have a high linear absorption coefficient.
Modeling of Macro-Physical Parameters of Foam Glass under Exposure of Cyclic Thermal Effects
Authors: Fedosov S.V. , Bakanov M.O. , Nikishov S.N.
Published: December 2019

The process of the raw materials mixture heat treatment in the foam glass production is of great importance in the formation of the finished product thermal characteristics. Selection of optimal temperature regimes at the stages when the process of glass particles melting is activated and thermal decomposition of the gasifier occurs is of particular importance. Otherwise, a situation when the gasifier has decomposed by mass on the layers close to the material surface at that the reaction has not been initiated at the raw materials mixture center may emerge. The problem can be solved by the uniform heating throughout the raw materials mixture entire volume. The fact that excessive heating can entail additional financial costs for manufacturers’ energy resources and as a result the cost of the material can be increased and affect its competitiveness among thermal insulation materials should be taken into account. A method for calculating temperature fields allowing to simulate the thermophysical heating process in the center of the material under study on the basis of its surface temperature indicators has been presented in the paper. Such an approach may make calculation of the rational time intervals for the raw material mixture heat treatment prior to the foaming stages and partially optimization of the production process possible.
The Influence of the Temperature Gradient near the Crack Surface on its Stability under Steady-State Thermomechanical Effects
Authors: Shevelev V.V. , Ozherelkova L.M. , Tishaeva I.R.
Published: December 2019

The development of methods for predicting the reliability of structural elements based on brittle fracture criteria is a rather complex mathematical task. This is due to the fact that these criteria are usually obtained in the framework of the mathematical theory of cracks, the boundary problems of which allow a limited number of exact analytical solutions. To this we must add that the brittle fracture of materials with disc-shaped circular fractures has been studied in thermomechanics and in the kinetic theory of strength, from our point of view, is not enough and research in this area seems to be relevant to us. In this regard, in this work, within the framework of the linear theory of elasticity, two cases of external impact on a material containing a circular disk-shaped fracture are considered: mechanical, in the form of a uniaxial tensile stress, and temperature, in the form of a temperature gradient in the region of a material containing a circular disk-shaped crack destruction. From the extremum condition, brittle fracture criteria such as the Griffith criterion are obtained both for the case of only mechanical loading of the material with uniaxial tensile stress, and for the case of only temperature exposure of the material in the form of a local temperature gradient at the crack surface.
Perspectives of the Application for the Nonlinear Deformation Model in the Calculations of Reinforced Concrete Elements
Authors: Toshin D.S.
Published: December 2019

The perspective directions of the calculation method applied application based on the nonlinear deformation model are presented. Some examples of the elements reinforced sections calculation applicability method with flexible, rigid steel reinforcement, composite reinforcement are given as well as the application of this method for the calculation of the uneven distribution of the strength and deformative characteristics of concrete and other damage to reinforced concrete structures; for the gain structure design, including the non-removing load; to assess the stiffness and carrying capacity of the elements with composite sections of various combinations of materials; for the calculation of the effect of repeated, alternating loads. To a large extent, the possibility of a broad application of the nonlinear deformation model is provided by the flexible form of mathematical writing of expressions for determining stiffness characteristics, which are transformed to the requirements of the solved problem.
Rectangular Cross Section Beams Calculation on the Stability of a Flat Bending Shape Taking into Account the Initial Imperfections
Authors: Zotov I.M. , Lapina Anastasia P. , Chepurnenko Anton S. , Yazyev B.M.
Published: December 2019

The article presents the derivation of the resolving equation for the calculation of lateral buckling of rectangular beams. When deriving the basic equation, the initial imperfections of the beam are taken into account, which are specified in the form of the eccentricity of the applied load, the initial deflection in the plane of least stiffness and the initial twist angle. The influence of initial imperfections on the process of beam stability loss is investigated.
Strength and Deformation of Bendable Plastic-Concrete-Tubal Structures
Authors: Dolzhenko Alexander V. , Naumov Andrey E. , Shevchenko Andrey V. , Simonov N.A.
Published: December 2019

In modern construction production, structures with the use of tube concrete elements are increasingly used [1]. The use of such structures can significantly reduce the weight of the building, as well as reduce the cost of construction and installation works by 2-3 times compared with similar structures made of classical reinforced concrete. At the same time, labor costs are reduced by 4–5 times. In comparison with metal structures, the cost is significantly reduced and the steel consumption is reduced by a factor of 2–3 with a slight increase in weight. Currently in our country the use of tube concrete structures is not widespread due to insufficient study of their work under various influences. The tube in tube concrete structures simultaneously plays the role of a shell, as well as longitudinal and transverse reinforcement. For a classic tube concrete, the tube is able to perceive the resulting forces from different angles and in all directions. Concrete in the plastic tube, being in conditions of triaxial compression and withstands stresses considerably exceeding the cube and prism strength of concrete. In such structures, the tube prevents the formation of microcracks in the concrete core.
Light Steel Thin -Walled Structures Composite Beam of Cellular Concrete
Authors: Ghareb AL-Hasnawi Yasser Sami , Shevchenko Andrey V. , Alhashimi Omar Ismael
Published: December 2019

The cost-efficient field design is very important in the civil engineering. Therefore, the cold-formed steel structures (CFS) are preferred for construction. A Sophisticated CFS structure which uses a Cellular Concrete is implemented in this paper. The utilization Cold-Formed Steel (CFS) structures have become increasingly popular in different fields of building technology. The reasons behind the growing popularity of these products include their fabrication ease, high strength/weight ratio and suitability for a wide range of applications. These advantages can result in more economic designs, as compared with hot-rolled steel, especially in short-span applications. In this project work an attempt to use a Cold formed steel section as replacement to conventional steel reinforcement bar has been made.
Features of Phasea Mineralogical Conversions when Burning Wall Ceramics on the Basis of Secondary Materials for Processing Coal Deposits of Eastern Donbass
Authors: Yavruyan Kh.S. , Gaishun E.S. , Kotlyar V.D. , Okhotnaya A.S.
Published: December 2019

The paper presents the results of the studies on the phase conversions taking place during the firing of the refuse piles processing sieve residue in the Eastern Donbass, which are the promising raw materials for the production of various types of structural ceramics – common, lining and clinker bricks, high-performance ceramic stones, ceramic tiles and siding. It is established that the sieve residue is the raw material of the low-temperature baking. Depending on the degree of grinding, the raw material may belong to the group of mid-baking or high-baking raw materials. The sieve residues have a rather narrow baking interval - no more than 50 °C, which is possible to expand by increasing the content of fine fractions during the preparation of sieve residue. The main mineral phases at the firing temperature of 1000-1100 оС are quartz, feldspar, ferrous silicates and aluminum silicates (fayalite, hypersten, etc.), hematite. The features of the phase and mineralogical conversions allow us to recommend to fire products on the basis of sieve residue at temperatures of 1000 °C and higher.
Computer Simulation of Composite Beams Dynamic Behavior
Authors: Fyodorov V.S. , Sidorov Vladimir N. , Shepitko E.S.
Published: December 2019

The paper is devoted to the computer simulation of polymer composite beams dynamic behavior. The use opportunity of one-dimensional beam models for the design of composite elements instead of three-dimensional ones is discussed. The tree-dimensional modeling is implemented using the finite-element software SIMULIA Abaqus considering the orthotropic properties of the composite material. For the one-dimensional modeling two hypothesis of the internal friction – local and nonlocal – are applied and compared. The Kelvin-Voigt hypothesis is used as a local damping model. The nonlocal model is based on the nonlocal mechanics principals and obtained using the Galerkin method. The example glass fiber reinforced plastic beam with the fixed ends is considered under an instantly applied load. The parameters of the nonlocal damping model are defined using the least squares method. The flexibility of the nonlocal damping model is shown and the use opportunity of one-dimensional beam models for the design of composite elements is justified.
The Solution of a Spectral Task on Variable Section Compressed Beams Vibrations by Numerical Methods
Authors: Kulterbaev Khusen P. , Baragunova Lyalusya A. , Shogenova Maryana M. , Shardanova Maryana A.
Published: December 2019

Free flexural free vibrations of variable section are considered. The vibrations mathematical model represents the boundary value problem consisting of the hyperbolic type and boundary conditions main equation. By means of separation method of variables the task at the beginning comes to homogeneous differential equation of the fourth order for fundamental function with the corresponding boundary conditions. The grid area of an argument change and fundamental function in it are applied. That leads to an algebraic problem of eigenvalues. Multimodal non-negative function which null values match its eigenvalues is designed. The finite differences methods and coordinate descent in combination with the specified function sections graphic visualization at a small amount of descents with an adequate accuracy for eigenvalues practice are given. The known ways to define fundamental functions are applied.
The Elastoplastic Impact Process Study of the Indenter and the Plate Lying on the Base
Authors: Rukhlenko Sergei A.
Published: December 2019

The massive body impact on a uniformly stretched pivotally supported rectangular plate on an elastic Winkler base and on an endless plate lying on the surface of an ideal incompressible fluid is investigated. The asymptotic behavior of the Green influence function is used. The elastoplastic impact solution is in good agreement with numerical calculations and experimental data. The results to study the material properties are used when an indenter impacts ice.
Management of the Design Parameters in Optimal Design Problems
Authors: Klyuev Sergey V. , Klyuev A.V. , Grishko A.K. , Trukhanov S.V.
Published: December 2019

The solution to the problem of designing rational load-bearing structures should be associated with the direct use of the principles that govern the deformation of a solid. If the functional of the direct problem has as Euler – Lagrange equations and natural boundary conditions the equations and boundary conditions of the accepted deformation theory, then they must correspond to the functional of the design problem, in addition, to additional equations indicating the dependence of the system energy change on the configuration change and the elastic modules of the body material. Possible variations of the configuration functions and modules of elasticity of the material will be infinitely small changes of the functions satisfying the prescriptive requirements to the structure and material; they are continuous and satisfy the requirements of differentiability. Due to the small variations in the functions that determine the configuration, we neglect changes in the arrangement of external forces relative to individual parts of the body and changes in the temperature field.
Development of the Compositional Binder for Cement-Concrete Used in Monolithic Construction
Authors: Kazlitina O.V. , Martynova Karina Y. , Golubinsky Artem K. , Kazlitin S.A.
Published: December 2019

One of the urgent problems of modern concrete science is the use and improvement of high-quality concrete. The emergence of such concretes has opened a new era in construction. Their unique properties are: high strength and corrosion resistance, water resistance and frost resistance, adjustable deformability. High-quality concretes provide high guaranteed parameters of the operational reliability of buildings and structures under the conditions of complex environmental effects and loads, significantly reduce construction time and reduce investment risks. One of the promising materials that allows you to ensure all of the above characteristics is fine-grained concrete based on a composite binder.
Chipboards with Plasma Protective Decorative Coatings
Authors: Bondarenko Nadezhda I. , Chuev Sergey A. , Dogaeva Ludmila A. , Jalovencko Tatiana A.
Published: December 2019

A plasma technology has been developed for the production of chipboard with vitreous protective decorative coatings. To prevent high temperatures of the plasma jet from being applied to the front surface of the chipboard, an intermediate layer was applied, which included a mixture of sodium liquid glass with colored glass powders based on profiled and sheet cullet. The technology of a two-stage deposition of an intermediate layer before plasma spraying of the main vitreous coating has been developed. The technology provides for the preliminary front surface preparation and the liquid glass application on a wood chipboard, the intermediate layer application and subsequent drying at 95 °C. The adhesion strength of the intermediate layer with the matrix was 1.6–1.8 MPa. The optimal technological parameters of plasma-chemical modification of a protective decorative coating based on fine powders of sheet and profiled glasses have been established: the power of an electric arc plasma installation operation is 8 kW, the flow rate of argon plasma gas - 2.0 m3/hour. It is shown that the water resistance of protective decorative coatings based on profiled and sheet glass is III hydrolytic class. Vitreous coatings had high reliability and durability, in particular, acid resistance, alkali resistance and microhardness. Due to the electric arc plasma installations use for plasma-chemical modification of protective decorative coatings based on profiled and sheet glass cullet, the technology is resource and energy efficient, and is also recommended for introduction both in furniture industry and in the construction industry.
Examining the strings of our violins whilst Rome is burning: A rebuttal
Authors: Veldsman Theo H.
Published: December 2019

Problemification: In response to the admirable objective of Efendic and Van Zyl’s (2019) article to offer recommendations to address the crisis of replication in industrial organisational psychology (IOP), I offer the counter-argument that this immediate crisis, although important, is of lesser importance in the greater scheme of the challenges faced by IOP, going into the future. It is merely symptomatic of a deeper and greater illness in IOP.Implications: I contend that the ‘lesser’ crisis of replication pales into insignificance against the backdrop of three accelerating and snowballing, interacting meta-crises within IOP: (1) growing irrelevance (= a burning Rome), (2) an outdated, constraining research paradigm (= an antiquated violin) and (3) ill, even toxic, research community dynamics and functioning (= our stressed-out violinists).Purpose: The aim of my rebuttal is to elucidate the three meta-crises and point out their life-threatening implications for IOP going into the future. Future-fit responses to address these meta-crises are offered.Recommendations: Given these meta-crises, going forward in building the academic reputation of the South African Journal of Industrial Psychology (SAJIP), a number of recommendations are made regarding making SAJIP future-proof (= fit-for-purpose, fire-fighting violins and violinists).
A Modified NHL-BFM-95 Regimen Produces Better Outcome Than HyperCVAD in Adult Patients with T-Lymphoblastic Lymphoma, a Two-Institution Experience
Authors: Li Chun , Wuxiao Zhi-Jun , Chen Xiaoqin , Chen Guanjun , Lu Yue , Xia Zhongjun , Liang Yang , Wang Hua
Published: December 2019

PurposeLymphoblastic lymphoma (LBL) is an invasive neoplasm of precursor T-cell or B-cell lineage. A broadly accepted standard treatment for adult LBL has not yet been defined.Materials and MethodsTo address this issue, we compared two chemotherapy regimens: a modified non-Hodgkin lymphoma Berlin–Frankfurt–Münster-95 (NHL-BFM-95) regimen and HyperCVAD/MA. This retrospective study consecutively enrolled 207 adult LBL patients at two hospitals from 2000 to 2018. Univariate and multivariate analysis were used to assess prognostic factors.ResultsIn the present study, most clinical characteristics were similar between the two treatment groups except for age and lactate dehydrogenase (LDH) level. Patients treated with modified NHL-BFM-95 regimen tended to be younger and with elevated LDH level. The modified NHL-BFM- 95 regimen produced better treatment outcomes than those with HyperCVAD/MA in patients with T-LBL or patients < 40 years. Treatment with HyperCVAD/MA, high Eastern Cooperative Oncology Group scores, and bone marrow involvement were independent risk factors in T-LBL. No patients interrupted treatment for severe adverse events.ConclusionThe results suggested that the modified regimen is well-tolerated and can produce the promising outcomes in patients with T-LBL or patients < 40 years.
Além dos registros instrumentais: a metodologia qualitativa na construção de pesquisas da geografia do clima
Authors: Mendes Lidiana De Pinho , Tommaselli José Tadeu Garcia
Published: December 2019

O objetivo do presente artigo foi desenvolver uma reflexão teóricometodológica acerca da adoção de metodologias qualitativas em pesquisas voltadas à compreensão geográfica do clima. As discussões estão balizadas pelo exemplo da rotina de trabalho de varredoras(es) de ruas de Presidente Prudente/SP. A atividade em foco é realizada a céu aberto, em uma cidade tipicamente tropical. Sob esta situação, questiona-se quais poderiam ser as relações e percepções dessas(es) trabalhadoras(es) com os elementos atmosféricos? Certamente, suas experiências e percepções em relação ao clima se diferem de outros sujeitos como, por exemplo, aqueles que atuam em locais fechados. A discussão busca centralizar os sujeitos nas pesquisas em Geografia do Clima e apresentar as potencialidades das metodologias em pesquisa qualitativa.
Movimentos pendulares para trabalho e estudo: estratégias metodológicas a partir dos censos demográficos de 2000 e 2010
Authors: Tavares Érica , Monteiro Jéssica
Published: December 2019

Os movimentos da população no espaço constituem um processo social ligado à estruturação urbana e regional. Esses movimentos resultam das transformações sociais, políticas e econômicas, mas também influenciam a organização da sociedade no espaço. Nesse contexto, os movimentos pendulares são uma expressão da mobilidade cotidiana e estão relacionados às diferentes formas de apropriação do espaço urbano e regional. O objetivo desse texto é apresentar orientações metodológicas para análise dos movimentos pendulares para trabalho e estudo, a partir de informações dos Censos Demográficos brasileiros de 2000 e 2010, dada a sua relevância para os estudos demográficos, urbanos e regionais. Portanto, a metodologia adotada consiste em uma sistematização operacional para tratamento dos microdados censitários referentes aos movimentos pendulares.
Hedonic eating behaviors and food preferences associated with medication-assisted treatment for opioid use disorder
Authors: McDonald, MS, FNP-BC Elizabeth , Laurent, PhD, FNP-BC Jennifer
Published: December 2019

Objective: To characterize hedonic eating behaviors such as sugar cravings, food preferences, and appetitive responsiveness for sweet and hyper-palatable foods, and to determine the prevalence of addictive like eating behaviors and food addiction (FA) in individuals receiving medication-assisted treatment (MAT) for opioid use disorder (OUD).Design: Quasi-experimental.Setting: Outpatient MAT center.Participants: Nonpregnant adult patients undergoing MAT (n = 116) receiving either buprenorphine/naloxone or methadone for at least 6 months.Main outcome measures: Hedonic eating, FA, and food craving.Results: Of the aggregate sample, 13.3 percent met criteria for FA. More than onethird of all subjects endorsed consuming larger amounts of highly palatable food than intended, unsuccessful attempts to quit or cut down on eating such foods, and a great deal of time spent on consuming or recovering from consuming such foods. Both medication groups demonstrated greatest cravings for sweets and fast foods followed by carbohydrates and fats (p < 0.001). Similarly, subjects reported “giving in” most frequently to sweets and fast foods followed by carbohydrates then fats (p < 0.001). Greater appetitive responsiveness was noted in the presence of hyper-palatable foods. No group differences were found. Weight change was not associated with addictive like eating, food craving, or appetitive responsiveness.Conclusions: Individuals receiving MAT exhibit preferences for sweet and fast foods that appear to be influenced by the proximity of such foods. FA was present. Collectively, such eating behaviors and food preferences may pose additional adverse health consequences and associated co-morbidities. This underlies the importance of comprehensive healthcare for patients with OUD, including nutrition education and evaluation of eating behaviors and food preferences.
Patterns in opioid prescription in the United States by region and prescribers over a 4-year period
Authors: Bigal, BA Luisa M. , Bibeau, PhD Kristen , Dumbar, PhD Stephanie
Published: December 2019

Background: As determinants of the opioid epidemic are several, describing patterns of opioid prescription over time is of importance.Objective: To characterize the prescribing patterns of opioids per US region and physician specialty from 2012 to 2015.Methods: Truven Health Analytics MarketScan® Databases were used to obtain data on opioid prescription rates per US region and physician specialty for the years 2012-2015. Opioids included in the study are tramadol, hydrocodone, codeine, oxycodone, oxymorphone, methadone, and fentanyl.Results: Starting sample consisted of 5,860,096 individuals. An increase in prescriptions was seen for codeine (22.3 percent), oxycodone (22.4 percent), and tramadol (22.4 percent), while other opioids had decreases between 6.5 and 20.2 percent during this period. Family medicine physicians were the most frequent prescriber for all opioids except for oxycodone; nonphysician prescribers’ share of prescriptions nearly doubled for all opioids. The share of oxycodone and of tramadol among all opioids increased in all regions, while the opposite was seen for hydrocodone. Codeine prescription share increased substantially in the South but not in other regions. When comparing the period of 2012-2015, differences were significant for all regions (p < 0.0001 for all regions). In 2015, the rate of prescription of oxycodone was nearly twofold higher in the Northeast vs North Central (38 percent vs 18.5 percent, p < 0.0001), while tramadol was substantially more frequently prescribed in the South, where it responded to nearly 20 percent of all opioid prescriptions (p < 0.0001).Conclusion: Patterns of prescription per opioid vary considerably per physician specialty and per US region. Although an overall decrease in prescriptions was seen, certain opioids were more frequently prescribed in 2015 than in 2012.
Key characteristics and habits of the recreational opioid user
Authors: Schinas, MSc Anna , Nanji, BSc Shein , Vorobej, MSc Kira , Mills, MSc Catherine , Govier, BSc Dawn , Setnik, PhD Beatrice
Published: December 2019

Objective: To identify key characteristics and habits of recreational opioid users.Design: The data were compiled from volunteers who participated in clinical studies at a contract research organization in Toronto, Ontario, Canada.Interventions: Data were collected from 5,018 male and female recreational opioid users via telephone and face-to-face screening interviews. Five recreational opioid users participated in a live interview broadcast on the internet.Main outcome measures: Demographic data, recreational drug use history, routes of recreational drug administration, alcohol use, and smoking status. A subset of the demographic information and recreational drug use history was summarized separately using data collected between 2013 and 2016 from 114 recreational opioid users who were not dependent on opioids. Interview excerpts were included from five recreational opioid users who described their real-world experiences with drug abuse, including the impact of abuse-deterrent opioid formulations on their drug abuse behavior.Results: The preferred route of administration of opioids was oral (52 percent), followed by intranasal (36 percent), intravenous (10 percent), and buccal (chewing on a patch; 2 percent). Other substances used included nicotine, alcohol, and non-opioid psychoactive drugs (primarily cannabis). Oxycodone was the most frequently reported opioid of abuse.Conclusions: Recreational opioid users have distinct drug-related behaviors and preferences. Monitoring current trends and examining these behaviors is an important component to understand the potential safety risks associated with recreational opioid use.
Heavy metals in blood and in nests affect reproduction parameters in Eretmochelys imbricata, Linnaeus, 1766 (Testudines: cryptodira)
Authors: Simões Thyara Noely , Silva Arley Candido , Santos Andre Mauricio , Chagas Cristiano Aparecido
Published: December 2019

In this study, blood, eggshells, and nest sediments of sea turtles Eretmochelys imbricata, collected during their reproductive period, were analyzed by X-Ray fluorescence to determine the presence and concentrations of Ni, Co, Cu, Pb and Cr. Moreover, we analyzed the possible interference of such metals in some reproductive data. All elements were detected in low concentrations. Ni was the element found in the highest concentrations in the blood, eggshells, and sediment. Our results demonstrated that females with the highest concentrations of Ni in their blood presented fewer eggs in their nests; and that when the concentration of Cu in their blood is higher, the number of eggs increases. Cu has a different effect when in the sediments covering the nests; Cu concentrations in the sediment appear to be related to an increase in dead embryos. Hence, our results demonstrate that sea turtles are exposed and contaminated by heavy metals, and that such metals may influence the reproduction of hawksbill turtles E. imbricata, and probably other species of sea turtles.
Climate change in a conceptual atmosphere–plankton model
Authors: Károlyi György , Prokaj Rudolf Dániel , Scheuring István , Tél Tamás
Published: December 2019

Abstract. We develop a conceptual coupled atmosphere–phytoplankton model by combining the Lorenz'84 general circulation model and the logistic population growth model under the condition of a climate change due to a linear time dependence of the strength of anthropogenic atmospheric forcing. The following types of couplings are taken into account: (a) the temperature modifies the total biomass of phytoplankton via the carrying capacity, (b) the extraction of carbon dioxide by phytoplankton slows down the speed of climate change, (c) the strength of mixing/turbulence in the oceanic mixing layer is in correlation with phytoplankton productivity. We carry out an ensemble approach (in the spirit of the theory of snapshot attractors) and concentrate on the trends of the average phytoplankton concentration and average temperature contrast between the pole and equator, forcing the atmospheric dynamics. The effect of turbulence is found to have the strongest influence on these trends. Our results show that (a) sufficiently strong mixing is able to force the typical phytoplankton concentration to always decay globally in time, and the temperature contrast to decrease faster than what follows from direct anthropogenic influences. Simple relations found for the trends without this coupling do, however, remain valid, just the coefficients become dependent on the strength of coupling with oceanic mixing. In particular, the phytoplankton concentration and its coupling to climate is found to modify the trend of global warming, and is able to make it stronger than what it would be without biomass.
UNDERSTANDING LINK BETWEEN LAND SURFACE TEMPERATURE AND LANDSCAPE HETEROGENEITY: A SPATIO-TEMPORAL AND INTER-SEASONAL VARIABILITY STUDY ON KABUL CITY, AFGHANISTAN
Authors: Mahmoodi S. , Dutta K. , Basu D. , Agrawal S.
Published: December 2019

Abstract. Satellite imageries were used to study temporal and seasonal patterns of Land Surface Temperature (LST) in Kabul, followed by establishing an interrelation with Land Use Land Cover (LULC) changes occurring in the city. LULC and LST changes were examined based on Landsat Thematic Mapper (TM) and Landsat Operational Land Imager (OLI), Thermal Infrared Sensors (TIRS). LST Maps were derived from the thermal band of Landsat images for decadal study (Winter/Summer; 2008–09 and 2018–19). Visible bands were utilized for supervised LULC classification in the same decade. Results showed that Kabul City expanded rapidly over the study period from 232.28 km2 to 371.08 km2 in one decade (2009–2019). Other land cover classes i.e. barren land, mountains and vegetation, were observed to be converted to urban class i.e. residential, commercial, and industrial. High LST zones of Kabul city consisted of mountains, barren land and urban areas. Notable difference of 3 °C was observed between urban and vegetated lands. This study successfully identified the areas (i.e. district 12, district 13 and district 17) currently affected by rapid urban sprawl. The results also highlighted the changes in LST pattern caused by urbanization. The study will help the government, private sector investors and land planners to develop sustainable land management policies.
GIS BASED MULTI-PARAMETER OPTIMAL PATH ANALYSIS FOR RURAL SCHOOLS
Authors: Meena D. K. , Tripathi R. , Agrawal S.
Published: December 2019

Abstract. Using the Geographic Information System (GIS) technology, transportation and network analysis has become a straightforward application. An underlying problem in transportation and network analysis is to find optimal paths between different locations from sources to destination on a network. Sometimes this optimal path between source to destination has to be done in real-time. Several optimal path algorithms have been proposed by the researchers based on single parameter problem. In this paper, a multi-parameters based optimal path solution is proposed using GIS software for the travelling of children to schools. For these rural schools of Bara tehsil of Prayagraj district in India is selected. Three different parameters are taken to find the optimal path which is population density-based, travelling distance-based and travelling time-based optimal path. The developed optimum path is the least cost and satisfied by the other technical, environmental, economic and social criteria. This paper provides a solution if the government need to apply any policy that needs to visit each school. This paper will help the government in land management. On the basis of this paper, government can find schools which are not connected with road and can plan a new road to connect each school by road.