bluuebunny/crossref_metadata_2025 huggingface dataset:
Heat-Resistant Sitall Coatings for High-Temperature Corrosion Protection of Nichrome Alloys
Authors: Lazareva E.A.
Published: May 2020

The bases of physical and chemical processes of technology of heat-resistant Sitall coatings are considered. Presents the results of investigations of phase composition and nanostructure of the contact layer system "nichrome - sitelove coverage" depending on the chemical composition of stellamaris coatings and their mode of microcrystallization. Identified and established the theoretical and technological special-news stalowych formation of coatings on the surface Narumov.
Precipitation of Composite Wear-Resistant Nickel Ectrodeposits with Nanoparticles
Authors: Degtyar L.A. , Zhukova I.Y. , Mishurov V.I.
Published: May 2020

The composition of the electrolyte-colloid was optimized by the method of mathematical planning of extreme experiments of Box-Wilson to obtain a composite electrochemical coating of nickel-nanodiamond. Polarization researches have shown a decrease in polarization in electrolytes containing diamond nanoparticles. The effect of the colloidal phase introduced into the electrolyte or formed during the electrolysis process on the electroplating process and the quality of precipitation was discussed. The wear resistance, microhardness, corrosion resistance of these deposits was investigated. These semi-bright and wear-and corrosion-resistant (Corrodcote-test) coatings are recommended as a substitute for electroplated chromium (better ecology). The morphology and surface of electroplating nanoparticles based on nickel were investigated using the «semi-contact» method on a PHYWE atomic force microscope. The leveling effect of diamond nanoparticles is shown.
Development of Technology of Robotized Laser Welding of Thin Wall Products from Heat-Resistant Alloys
Authors: Krylova S.E. , Zavyalov V.A. , Goltapin M.I.
Published: May 2020

Results of the developed industrial technology of restoration of a surface corrosion-resistant staly are presented by method of laser building up. The comparative analysis of a microstructure of the built-up wearproof layer, an alloyage zone with material of a basis and diffusive zone at the different technological modes of building up is given. Influence of morphology of particles of additive powder on parametrical characteristics of the roller received by laser gas powder building up is investigated. The optimum modes of building up on a substrate from steel 12Cr18Ni10Ti are set. Tests for firmness against intercrystalline corrosion of the built-up powder compositions are executed by the AM method. Metalgraphic assessment of corrosion resistance is presented.
Structural-Phase State of the Interphase Boundary at Thermal Diffusion Metallization of Diamond Grains by Cr and Ti
Authors: Sharin P.P. , Akimova M.P. , Yakovleva S.P.
Published: May 2020

Structural-phase state of the diamond-metallized coating interphase boundary after thermal diffusion metallization of diamond grains by transition metals Cr, Ti were studied. Metallization were conducted under temperature-time mode corresponding to the sintering of cemented carbide matrices with Cu impregnation. The structural-phase state of the metallized coating and diamond-coating interphase boundary was studied by scanning electron microscopy, X-ray phase analysis and Raman spectroscopy. It was found that a thin continuous metal carbide coating chemically bonded to the diamond and consisting of the corresponding metal, their carbides and small amount of graphite phases is formed during thermal diffusion metallization of diamond by Cr and Ti under the conditions specified in the experiment. It was shown that graphite is formed not by a continuous layer, but in the form of local inclusions. This ensures a strong adhesion of the metallized coating to the diamond through the carbides of the corresponding metals. The results can be useful in the development of compositions and technological methods that provide an increased level of diamond retention in the matrices of tools based on cemented carbide powder mixtures.
The Study of the Destruction of Pipelines, Subject to Stress Corrosion Cracking
Authors: Nasibullina O.A. , Rizvanov Rif G.
Published: May 2020

Stress corrosion cracking (SCC) is one of the reasons of failure of main gas pipelines. SCC appears in the form of the single and multiple cracks arising on an outer surface of a pipe. In work different types of the analysis of destruction of the pipeline having multiple cracks are presented. For the purpose of studying of a number of features of SCC by authors various researches were conducted: electrochemical researches, potentiodynamic measurements at various temperatures. With the help of potentiometric studiesit is shown that at low temperatures process of formation of a passive film is at a loss, however, with temperature increase processes of oxidation of metals proceed much quicker, at the same time decrease of their thermodynamic opportunity is observed. The nature of temperature effect is defined on oxidation rate of metals by temperature dependence of a kinetic constant of chemical reaction that is expressed by the Arrhenius equation.
Improving the Efficiency of Protection of the Forest Fire Machine against Forest Fires with the Help of Composite Materials
Authors: Ustinov A. , Pitukhin Eugene
Published: May 2020

The article presents the results of work aimed at improving the efficiency of forest fire protection machine from forest fires using composite materials. The composition and technology of composite material “water glass – graphite microparticles” production is proposed. It was found that composite material is able to maintain the phase composition and structure at elevated temperatures. Methods of application of fire-retardant composite material on the protected surfaces are considered. The values of limit loads that lead to the destruction of composite material are revealed. A mathematical model was developed and a numerical experiment of high temperatures on composite material was carried out using it as a fire-retardant coating. The resulting composite material can be used as a protective coating for the surfaces of the enclosure of cabins of forest fire machines, building structures. CM can be used as a lining of equipment in the thermal power and metallurgical industries, as well as in equipment used in emergency situations.
Regularities of Changes in the Mechanical Characteristics and Electrical Properties of the Reaction Furnaces Coils Material during Operation
Authors: Naumkin E.A. , Shermatov J.N.
Published: May 2020

The main causes of early failure of reaction furnaces coils are diffusion processes in the material as a result of which structural changes occur, new phases are formed and void structure is formed in the surface layers of the metal, which has a negative effect on the mechanical characteristics. In this regard as a structurally sensitive method, which allows evaluating the changes occurring in the metal, the response parameters of the electrical signal are used which are sensitive to pore formation and allow predicting the zone of formation of the breaking crack. Fragments of the coils of the reaction furnaces from the radiant section, which were in operation for 750, 1300, 8000, and 10000 hours and the pipe element in the delivery condition were chosen as the objects of the study. As a result of the research a correlation between the amplitude of the first harmonic of the electrical signal output voltage with the results of static tests for tensile and impact bending was established. This happens due to the fact that during operation there is an increase in the relative impact viscosity and relative tensile strength, and the relative magnitude of the voltage amplitude of the first harmonic of the output electrical signal also increases. These results can be used as a method of mechanical properties assessment by non-destructive testing, and also they can be used to develop a criterion for the rejection of reaction furnace coils.
Cullet-Filled Concrete
Authors: Shishkanova V.N. , Ivanko M.V. , Kozlov Andrey Yu.
Published: May 2020

The paper considers how cullet of different particle-size distribution affects the concrete strength. Experiments have proven that large-particle cullet (1.25 cm or larger) could be used as an aggregate; the concrete strength will be on par with those of ordinary natural/crushed sand concrete. The paper proves the feasibility of injecting highly dispersed silica fume in combination with effective polycarboxylate-based superplasticizers in cullet-based concrete mixtures. Highly dispersed silica fume will positively affect the strength characteristics of concrete, as silica fume in cement rock reacts with Са (ОН)2, which is released upon the hydration of the clinker minerals С3S and С2S; the reaction produces very strong compounds. Concretes containing up to 30% silica fume in combination with a superplasticizer will feature very high early strength. Use of strong aggregates with a 30% cullet content can produce strong concretes; after steamed, a concrete containing silica fume and polycarboxylate-based superplasticizer will reach 90% of the graded strength. Cement-rock microstructure studies show that the polymer component of the STACHEMENT 2280 superplasticizer will gradually transcend from the glass grains to the cement rock. The interface between the polymer-coated glass grains and the cement rock is blurred and barely present. This strengthens the glass-rock adhesion and improves the concrete strength. This is why cullet is recommended for use in the production of curb stones.
Polymeric Tribotechnical Composites on the Basis of Polytetrafluoroethylene and Complex Fillers
Authors: Isakova T.A. , Petrova P.N.
Published: May 2020

Perspective polymeric materials for use in frictional units as bearings and sliding supports, the mobile sealants of piston rings, cuffs are composites on the basis of polytetrafluoroethylene (PTFE). They significantly improve the performance of equipment at low temperatures, reduce repair expenses and losses from idle times. When modifying polymers, physical methods of exposure are increasingly used, ensuring the activation of materials and high performance characteristics. Objective: the effect of complex fillers, obtained by their joint activation in a planetary mill, on the deformation and strength and tribological characteristics of composites based on PTFE. This work shows the promise of using the joint mechanical activation of components of different nature to obtain complex fillers. The use of the modified ultradispersed polytetrafluoroethylene (UPTFE) of zeolite as a filler of PTFE leads to complex improvement of properties of composites: the tensile strength and elongation at rupture increase by 20% in comparison with initial polymer. The wear resistance increases by 3-6 times in comparison with the composites containing only the activated zeolite and by 900 times in comparison with initial polymer. The addition of the modified UPTFE of a magnesium aluminate spinel (MAS) leads to increase in deformation and strength properties by 10-30% and an increase in wear resistance by 140 times in comparison with initial polymer.
Development of Antifriction Materials Based on Polytetrafluoroethylene with Carbon Fibers and Tungsten Disulfide
Authors: Vasilev A.P. , Struchkova T.S. , Alekseev A.G.
Published: May 2020

This paper presents the results from the investigation of effect the carbon fibers with tungsten disulfide on the mechanical and tribological properties of PTFE. Is carried out a comparison of mechanical and tribological properties of polymer composites PTFE-based with carbon fibers and PTFE with complex filler (carbon fibers with tungsten disulfide). It is shown that at a content of 8 wt.% CF+1 wt.% WS2 in PTFE, wear resistance increases significantly while maintaining the tensile strength, relative elongation at break and low coefficient of friction at the level of initial PTFE. The results of X-ray analysis and investigation of SEM supramolecular structure and friction surfaces of PTFE and polymer composites are presented. It is shown that the degree of crystallinity of polymer composites increases in comparison with the initial PTFE. The images of scanning electron microscope reveal that particles of tungsten disulfide concentrating on the friction surface is likely responsible to a reduction in the coefficient of friction and increase the wear resistance of PTFE-based polymer composites with complex fillers.
Obtaining Biologically Active Polypropylene Fibrous Materials
Authors: Bordunov Sergey , Galtseva Olga , Plotnikova Inna
Published: May 2020

The paper presents the results of the development of the technology of centrifugal-die forming of biologically active fibrous materials. The modification of biologically active polypropylene fibers was carried out directly at the process of their production in the field of centrifugal forces of rotating reactor during their molding from polypropylene melt. The properties of the obtained ion-exchange and biologically active polymer fibers are studied. It is shown that obtained and modified by the centrifugal-die method polypropylene fibers can be used as biologically active fibers.
Assessment of Applicability of the MPF-4 Magnesium Powder for Manufacturing Parts Using 3D Printing Technologies
Authors: Kulchin Yuri N. , Nikitin A.I. , Nikiforov Pavel A. , Pivovarov D.S. , Yatsko D.S.
Published: May 2020

The article provides study results for two samples manufactured with the MPF-4 magnesium powder by means of directed laser energy and material deposition. The authors studied microhardness and microstructure of the samples by means of optical and electronic microscopic techniques; provided results of the impact of annealing on microstructure and microhardness of the samples; and assessed the possibility of using the MPF-4 powder for manufacturing parts using 3D printing technologies.
Composite Materials Based on Magnesium and Calcium Phosphate Compounds
Authors: Podgorbunsky Anatoly B. , Shichalin O.O. , Gnedenkov S.V.
Published: May 2020

This paper presents the process and results of the formation of multifunctional materials based on magnesium for the needs of implant surgery. An integrated approach has been developed, including: (i) the synthesis of porous magnesium preforms by means of a powder metallurgical process; (ii) formation of composites based on synthesized nanoscale hydroxyapatite powder and magnesium metal powder by spark plasma sintering technology.
On the Theory of Determining the Transport Characteristics of Gas Mixtures
Authors: Anisimova I.V. , Ignat'ev A.V.
Published: May 2020

The paper considers the identification of properties of real gases and creation of nanomaterials on the basis of molecular and kinetic theory of gases, namely the Boltzmann equation. The collision term of the Boltzmann equation is used in the algorithm for the identification of transport properties of media. The article analyses the uniform convergence of improper integrals in the collision term of the Boltzmann equation depending on the conditions for the connection between the kinetic and potential energy of interacting molecules. This analysis allows to soundly identify the transport coefficient in macro equations of heat and mass transfer.
Phase Transformations in Cement Matrix at Low Temperatures
Authors: Potapova Ekaterina , Korchunov I. , Perepelitsyna S.
Published: May 2020

The paper presents the results of the phase composition and structure of cement, hardened under alternating freezing/thawing. The fluctuation in the density of the cement through the number of freezing/thawing cycles was determined by the method of helium pycnometry. It is shown that the average size of micropores changes in the presence of plasticizing additives. It is determined that the type and size of pores in the cement effect on frost resistance. The positive effect of mineral slag on the frost resistance of the binder is demonstrated. The positive effect of mineral and polymer additives on the frost resistance of the binder has been discovered and presented in this work.
A Mathematical Model of the Field of the Strain Tensor in Terms of Deformation of the Flat Shell Structures
Authors: Grigorieva A.L. , Grigoriev Y.Y. , Khromov A.I. , Zharikova E.P.
Published: May 2020

The article considers the topic of mechanics of a deformable solid. Mathematical modeling of the process of deformation of shell structures by deforming a flat sample (part of the shell) under conditions of a plane stress state with a discontinuous field of displacement velocities is considered. Analytical solutions were obtained for the fields of strain tensors observed in shells of various materials during their deformation. A comparative analysis is carried out under various deformation states. Such decisions are due to the need to obtain deformation fields at various points of the shells used at objects of various directions (military, industrial, etc.) and there are significant difficulties in determining the strain fields by numerical methods (for example, the finite element method).
Mathematical Models Analysis of Combined Processing Methods of Parts
Authors: Taysaev K.K. , Petrova L.G.
Published: May 2020

In the article researches mathematical models that ensure effectiveness of use combined methods for parts processing. The use of combined processing methods is always associated with the search for technological compromise and boils down to technical and economic indicators comparative assessment. In this case, it is necessary to rely on mathematical models that objectively reflect manufacturing parts technological processes. Mathematical methods and models for optimizing production processes for manufacturing parts that are applicable in combined methods for processing parts are a complex formalized scientific abstraction that describes production functioning process at all stages of its implementation. In the synthesis of various processing methods, it is necessary to ensure that a number of conditions are met that determine necessary and sufficient conditions for implementing feasibility a particular technology in the combined method of processing parts. Multiple regression analysis methods allow minimizing experiments number in mathematical model determining which adequate to processes under study and form the baseline data for the transition from multi-factor to multi-criteria models. Using this approach, it is necessary to determine objective function optimal values parameters and influence factors in each specific technological process, which will allow us to bring the uncertainty removal in the processing materials technology to a new qualitative level.
Modern Techniques for Automated Acquiring and Processing Data of Diffraction Electron Microscopy for Nano-Materials and Single-Crystals
Authors: Sydorets V. , Berdnikova O. , Polovetskyi Ye. , Titkov Ye. , Bernatskyi A.
Published: May 2020

Progress in modern science and technology is impossible without the use of new materials, which include nanoparticles and single crystals. Existing approaches in the field of computer vision are difficult to apply to the processing of diffraction patterns, which contain information about the parameters of the fine structure of nanostructured and single-crystal materials. The aim of the work was to develop modern computer-aided techniques that, interacting with the software of the electron microscope, automatically receive and process the information contained in electron diffraction patterns. Replacing the diffraction pattern obtained by a transmission electron microscope with a three-dimensional relief makes it possible to reduce the problem to the solution of the optimization problem. This approach allows not only automating the process of scientific research, but also significantly reduces the time for obtaining the result and increases its accuracy. The application of the proposed approach is demonstrated in measuring the misorientation angles of large single-crystal tungsten ingots, which are obtained by the plasma-induction growing technology.
Modelling of Ultrasonic Concentrators for Processing of Volume Nanostructured Materials
Authors: Sapozhnik K.R. , Bashkov O.V. , Borisenko M.D. , Solovev Denis B.
Published: May 2020

The article is devoted to studying of stress and displacement amplitude distribution in ultrasonic concentrators of different forms. The modelling of different forms of ultrasonic concentrators was considered in detail that allowed to choose an optimal form of concentrator providing maximum amplitude of vibrational speed and uniform stress amplitude distribution across the concentrator section. The modelling was carried out for purpose of the subsequent application of ultrasonic treatment to nanostructured materials. Numerical calculation in the environment of MatLab is carried out and diagrams of dependences of stress and displacement amplitude distribution of conic, exponential, ampoule and two-ampoule forms of concentrators are constructed. Visual distribution models of stresses on the section of concentrators and elastic displacements of material in samples of these forms are constructed, resonance frequencies of longitudinal fluctuations of ultrasonic half-wave concentrators are found in the program Abaqus complex.
Damage Assessment of Specimens Made of Steel 09G2S Exposed to Low-Cycle Fatigue with the Help of Acoustic Emission Monitoring Method
Authors: Valiev A.S. , Khalikova G. , Kuzeev I.R.
Published: May 2020

Cyclic impact of external parameters on the structure, such as the daily change of temperature, change of operating parameters (pressure, temperature, volumes of loaded raw material) may lead to the brittle fracture of the equipment material with fast propagation of the main crack. In view of this, there is a need to use the nondestructive test methods which allow determining the critical level of damage accumulation. The article considers the pattern of change in properties as a result of low-cyclic loading by studying the parameters of acoustic signal. Changes in acoustic emission (AE) parameters were measured in the process of uniaxial tension of specimens with different degrees of accumulated damage. Upon processing of these AE parameters, stages of damage accumulation in cyclic fatigue were determined. Thus, is was determined that acoustic-emission diagnostics is sensitive to the said changes and may be used for assessment of the damage degree of 09G2S steel specimens.
Changes in the Characteristics of the Profiles of X-Ray Diffraction Lines of Structural Steels in the Elastic Stress Field
Authors: Gulyaev V.P. , Petrov P.P. , Stepanova Ksenia V.
Published: May 2020

The problems of improving operating procedures and diagnosing the bearing capacity of metal structures designed and operating in the Arctic and subarctic regions of the country with a long period of low climatic temperatures remain unresolved. The paper notes that the development of digital methods of non-destructive testing, primarily X-ray diffractometry methods, can provide technical diagnostics of structures by identifying the features of the deformation of the crystalline structure of structural materials in an elastic stress-strain state. It is shown that the application of the method of X-ray diffractometry of complex polycrystalline structural steels has sufficient resolution to detect changes in the fine structure under the elastically stressed state of the samples. The broadening of the diffraction line (B) profile characterizes the effect of the elastically stressed state of steel samples 08 ps and 09Г2С on the course of microdeformation processes in the surface layers of the metal. The effect of periodic annual temperature fluctuations on the profile characteristics of the diffraction lines of 08 ps structural steel samples was studied experimentally. It is established that low climatic temperatures contribute to the elimination of individual instrumental errors due to the design conditions of the experiment. A sharp change in the true half-width of the profile of diffraction lines (В) at stresses σ ≥ 0.5 σтindicates the minimum possible value of the allowable stress [σ] for structural steel 08 ps.
COVID-19 as an Acute Inflammatory Disease
Authors: Manjili Rose H. , Zarei Melika , Habibi Mehran , Manjili Masoud H.
Published: May 2020

The 2019 coronavirus disease (COVID-19) pandemic caused by the virus severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has created an unprecedented global crisis for the infrastructure sectors, including economic, political, healthcare, education, and research systems. Although over 90% of infected individuals are asymptomatic or manifest noncritical symptoms and will recover from the infection, those individuals presenting with critical symptoms are in urgent need of effective treatment options. Emerging data related to mechanism of severity and potential therapies for patients presenting with severe symptoms are scattered and therefore require a comprehensive analysis to focus research on developing effective therapeutics. A critical literature review suggests that the severity of SARS-CoV-2 infection is associated with dysregulation of inflammatory immune responses, which in turn inhibits the development of protective immunity to the infection. Therefore, the use of therapeutics that modulate inflammation without compromising the adaptive immune response could be the most effective therapeutic strategy.
A Case Report of Failure to Thrive Caused by Parental Intellectual Disability: The Invisible Population
Authors: Abu Bakar Atirah Az-Zahrah , Kadir Azidah Abdul , Idris Nursuhaila
Published: May 2020

This case illustrates the medical complication of a child that arose as a consequence of parents with intellectual disabilities in a primary care setting. A 9-month-old girl presented with multiple admissions because of recurrent pneumonia and was later diagnosed with failure to thrive based on child neglect resulting from the parents’ disabilities. This exemplifies a failure to thrive case with a complex and undiagnosed psychosocial background that required interdepartmental involvement to mitigate the health problem.
The hamster egg penetration test may decrease intracytoplasmic sperm injection utilization while maintaining high conventional fertilization rates
Authors: Ibrahim Yetunde , Einerson Brett , Carrell Douglas T , Emery Benjamin R , Johnstone Erica
Published: May 2020

This was a cohort study of in vitro fertilization (IVF) subjects at the University of Utah, Salt Lake City (UT, USA) utilizing partner sperm. Cycles where both the hamster egg penetration test (HEPT) and semen analysis were performed within 2 years prior to IVF cycles were stratified into four groups based on a normal or an abnormal HEPT and morphology. The mean conventional and intracytoplasmic sperm injection (ICSI) fertilization rates were calculated in each group. We performed a univariate analysis on the primary outcome comparing clinically interesting subjects. We performed a cost-effectiveness analysis of a policy of HEPT versus universal ICSI in couples with an abnormal morphology. Among patients with a normal HEPT, there was no difference in the mean conventional fertilization rates between those with a normal and an abnormal morphology. There was no difference in the mean conventional fertilization rates between subjects with a normal morphology without a hamster test and those with a normal HEPT without a morphology assessment. In 1000 simulated cycles with an abnormal morphology, a policy of HEPT was cost saving compared to universal ICSI, yet produced similar fertilization rates. The HEPT is similar to the World Health Organization edition 5 (WHO-5) morphology in predicting successful conventional fertilization while allowing decreased utilization of ICSI. A policy of HEPT for males with abnormal morphology saves cost in selecting couples for a fertilization method.
“Yu Jiyuan 余紀元 and Retrofitting ‘Metaphysics’ for Confucian Philosophy: Human ‘Beings’ or Human ‘Becomings’?
Authors: Ames Roger T.
Published: May 2020

In past work on Chinese “cosmology”, I have resisted using the term “metaphysics” because of the history of this term in classical Greek philosophy. Angus Graham has warned us of the equivocations that arise in eliding the distinction between Greek ontology and classical Chinese cosmology. In this essay, I have been inspired by my dear friend the late Yu Jiyuan’s distinction between classical Greek “metaphysics” and “contemporary metaphysics with ambiguous edges” to adapt the term “metaphysics” for use within the classical Confucian corpus. In the language of Confucian “metaphysics”, the ultimate goal of our philosophical inquiry is quite literally “to know one’s way around things’” (zhidao 知道) in the broadest possible sense of the term “things”. In the application of Confucian metaphysics, “knowing” certainly begins from the cognitive understanding of a situation, but then goes on to include the creative and practical activity of “realizing a world” through ars contextualis—the art of contextualizing things. I apply the insight that “metaphysics” so understood in the Confucian context provides a warrant for establishing a useful contrast between a Greek conception of the “human being” and a Confucian conception of “human becomings”.
Zhang Junmai’s Early Political Philosophy and the Paradoxes of Chinese Modernity
Authors: Nelson Eric S.
Published: May 2020

This article examines the significance of reflexive self-critical modernity in the development of early “New Confucianism” by reconsidering the example of Zhang Junmai in the context of the May Fourth and New Culture Movements. Whereas these movements advocated scientific rationality and thorough Westernization, Zhang’s education and research in Germany before and after the First World War led him to a critical perspective on Western modernity informed by its contemporary crisis tendencies and Western philosophical and social-political critics. Zhang adopted elements from German Idealism, life-philosophy, and social democracy to critique the May Fourth and New Culture Movements and reconstruct the “rational core” and ethical sensibility of Confucian philosophy. Zhang’s “self-critical modernity” was oriented toward a moral and social-political instead of a scientific and technological vision of Westernization. Zhang’s position was condemned by New Culture champions of scientific modernity who construed Zhang’s position as reactionary metaphysics beholden to the past without addressing his self-critical interpretation of modernity that adopted early twentieth century Western critiques of the spiritual and capitalist crisis-tendencies of modernity. In response to this complex situation, Zhang articulated a phenomenological interpretation of the social-political, ethical, and cultural lifeworld, drawing on classic and contemporary Chinese and Western sources, which endeavoured to more adequately address the paradoxes of Westernization and modernization, and the crisis of Chinese ethical life.
Hozonkai – fenomen ohranjanja ljudske glasbe in uprizoritvenih umetnosti na Japonskem: primer združenja Kokiriko uta hozonkai
Authors: Hrvatin Klara
Published: May 2020

Članek proučuje fenomen združenj hozonkai za ohranjanje ljudskih pesmi oz. ljudskih uprizoritvenih umetnosti, ki si prizadevajo ohraniti in prenašati japonske ljudske pesmi v »avtentični«, nespremenjeni obliki. Kot primer enega takšnih združenj in njegovega ravnanja z ljudskim glasbenim izročilom avtorica obravnava organizacijo in trenutne dejavnosti združenja Kokiriko uta hozonkai – ustanovljenega leta 1951 in zadolženega za ohranjanje in prenos plesne pesmi Kagura mai.Ob upoštevanju Hughesovih splošnih značilnosti združenj kot osnove avtorica poudari skupne značilnosti, ki jih Kokiriko uta hozonkai deli z večino združenj, hkrati pa osvetli tudi njegove posebnosti. Kokiriko uta hozonkai ima močnejši koncept lokalnosti in ni povsem konservativen glede morebitnih sprememb v glasbi Kagure mai v prihodnosti. Raziskava o združenju Kokiriku uta hozonkai in njegovem »ohranjanju« Kagure mai zastavlja tudi vprašanje, ali hozonkai resnično prenaša starodavno različico pesmi Kagura mai?
Hisaki Hashi: Das Paradoxon in der Philosophie – Zum Aufbau der humanistischen Welt
Authors: Rošker Jana S.
Published: May 2020

Hashi Hisaki, the author of this interesting book, is founder of the Association for Comparative Philosophy and Interdisciplinary Education (http://kophil-interdis.at/wb/pages/home.php). Since 1995 she has taught at the Department of Philosophy at the University of Vienna, Austria. The present book is written in German, as it is based upon Hashi Hisaki’s philosophy lectures at this university. It elaborates upon intercultural dimensions of a wide scope of problems, linked to the concept of paradox, starting from the famous classical “liar paradox” and then analysing various paradoxes exemplified in the works of Plato, Kant, Hegel, Klein, Reininger, Nagarjuna, Hanfezi, Dogen, and Nishida. The main goal of the work is to illuminate the creative function of paradoxes, and to show that it can raise in readers a vivid interest in independent and critical thinking. At the same time, it represents an inexhaustible source of integrative thinking and acting in our daily life.
Parallel Oppressions
Authors: Jones Alexis
Published: May 2020

Schooling is generally a culture, a context, where there are particular behaviors that are allowable and those that are not. What we allow, recommend, and encourage for both our students and teachers says a great deal about what our society believes about freedom, empowerment, politics, and controversy. This article shares a theoretical view of the authoritarian school structure and its impact on both students and teachers. While this is a primarily theoretical piece, the author also shares examples from current research that paint a picture of the unfortunate teacher-society and teacher-student interactions, but also the potential for meaningful human engagement.
Limiting Learning Environments through Domestication
Authors: Boutelier Stefani
Published: May 2020

This theoretically based paper analyzes the proliferation of domestication in our education systems inside and outside of the classroom. Looking at past and current trends, questions are posed and suggestions are made to break these cycles. Don Miguel Ruiz’s definition of domestication of children frames this paper and engages the reader to question their current practices and expectations of children and/or students.
Expediente
Authors: Da albuquerque: revista de história Editores
Published: May 2020

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Apresentação
Authors: Albuquerque: revista de história Editores de
Published: May 2020

Apresentação do número.
Arqueologia na Região das Grandes Lagoas do Pantanal
Authors: Peixoto José Luis dos Santos
Published: May 2020

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Quando a ação política, por mais destacada e importante, é considerada uma atividade “normal”. (Trajetória política de José Manoel Fontanillas Fragelli)
Authors: Neves Joana
Published: May 2020

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Fontes históricas: Olhares sobre um caminho percorrido e perspectivas sobre os novos tempos
Authors: Barros José d’Assunção
Published: May 2020

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Novela: um gênero polêmico
Authors: Oliveira Peterson José de
Published: May 2020

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Movimento divisionista e as diversas interpretações na historiografia: análise do Movimento Guaicuru
Authors: Verde Aline Xavier Cana , Vieira Thaís Leão
Published: May 2020

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Viagens a Mato Grosso (1887/88) (Segunda Expedição ao Xingu)
Authors: Vogel Peter , Krähenbühl Maria Alvina
Published: May 2020

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Mato Grosso e Concepción, uma experiência de fronteira no período colonial (século XVIII)
Authors: Reynaldo Ney Iared
Published: May 2020

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Repressão ao contrabando no Apa. Instruções. 1917
Authors: Cardoso Mario B.
Published: May 2020

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Retención de fósforo en suelos de drenajes en invernaderos comerciales.
Authors: José A. Dumas  , Joaquín A. Chong  , Magaly Cintrón  , Luis Reinaldo Santiago
Published: May 2020

Se estudiaron cinco invernaderos comerciales en la zona montañosa interior de Puerto Rico para identificar los cambios en las propiedades del suelo que afectan la retención de fósforo. Las muestras de suelo se tomaron a una profundidad de 0 a 15 cm dentro y fuera de los drenajes de los invernaderos. Las propiedades físico-químicas de los suelos dentro y fuera de los drenajes fueron diversas. El alto contenido de Fe y Al en los suelos de este estudio sugiere una alta capacidad de retención de fósforo. Los parámetros de retención de P estimados en el laboratorio indicaron diferencias en la capacidad de absorción de P entre los suelos. Los parámetros de retención de P se correlacionaron altamente con el Fe extraíble con ditionito-citrato. La concentración de P en equilibrio también se correlacionó con el Al extraíble con ditionito-citrato en los suelos fuera de los drenajes. Este hallazgo se debió a que el alto contenido de materia orgánica del suelo en los drenajes tuvo el efecto de contrarrestar la capacidad de retención de P que tiene el Al, lo cual indica la importancia de limpiar los drenajes de los residuos orgánicos para evitar el movimiento excesivo de P fuera del área de los invernaderos.
Botanical composition, yield and fermentative characteristics of lablab (Lablab purpureus L.) and sunn hemp (Crotalaria juncea L.) with yellow corn (Zea mays L.) for silage production.
Authors: Zavala David , Valencia Elide , Randel Paul F. , Ramos-Santana Rafael
Published: May 2020

Corn (Zea mays L.) is an ¡deal crop for silage because of its high levels of fermentable carbohydrates, but its major limitation for use in human and animal feeding is its low crude protein (CP) concentration. An alternative to increase CP in corn silage is through its association with annual legumes. This study involved intercropping two annual legumes, lablab (Lablab purpureus) and sunn hemp (Crotalaria juncea), with two yellow corn cultivars (HR-ORO and QPM) to assess the effect on dry matter yield (DMY); botanical composition of forage; CP, neutral and acid detergent fiber (NDF and ADF) contents; and fermentation products upon ensiling. The experiment was conducted in the Experimental Substation at Isabela, Puerto Rico, between September and December 2009 In an Oxisol soil. The experimental design was a split plot with 2 x 3 factorial; the main plots were the corn cultivars, and the subplots were the legume-corn associations and corn monoculture, with four replicates per treatment. Compared with that in corn monoculture, the mean incidence of weeds in the crop decreased from 31.08 to 13.64% in the associations, as the DMY increased from 8,216 to 10,068 kg/ha. The dry matter (DM) content of the silages was higher (P < 0.05) in monoculture (26.05%) than in association with lablab (24.30%), whereas CP increased from 9.5% (monoculture) to 10.6% (association). The overall content of NDF in the silage was 53.56%, and that of ADF increased from 32.68% in monoculture to 37.26% with legume inclusion. The overall values of the silages were pH, 3.75; percentages of lactic, acetic and total acids, 6.96, 2.53, and 9.40; and proportion N-NK/N total, 5.55%. There was little effect of the treatments on these variables, which is indicative of well-preserved silage. Corn-legume associations benefited weed control and DMY in the field, and increased the CP content of silage without affecting the fermentation process.
Agronomic characteristics and nutritive value of pigeon pea [Cajanus cajan (L.) Millsp.] harvested at different stages of maturity.
Authors: Figueroa Víctor M. , Rodríguez Abner A. , Randel Paul F.
Published: May 2020

This study was divided into three parts. The first evaluated the effects of five stages of plant maturity (60, 75, 90,120 and 180 d) on the agronomic characteristics, chemical composition and in vitro degradability (IVDMD) of pigeon pea [Cajanus cajan (L.) Millsp.] 'Kaki' and its anatomical fractions, leaves and stems. In the second part, the selective consumption of this legume was studied. In the third part, the effects of the inclusion of pigeon pea in diets based on tropical grass hay for goats on voluntary intake, and digestibility of dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) were determined. Plant height increased and leaf :stem ratio decreased, as the plants grew. In the whole plant, DM and NDF content increased (P < 0.05) by 13.9 and 19.2 percentage units, but CP content numerically decreased by 4.8 units as plant maturity progressed from 60 to 120 d. At the five successive stages evaluated, CP content in the leaves exceeded that of the stems, whereas NDF content showed the opposite trend. The IVDMD values were 69.6% in the whole plant, 73.9% in the leaves, and 50.4% in the stems. Whole plant IVDMD decreased (P < 0.05), with advancing plant maturity, from 71.2% at 60 d to 55.8% at 180 d. In the selective consumption trial, intake of fresh pigeon pea was compared with that of fresh native tropical grass (NTG) or NTG hay. A high selection of pigeon pea was observed for the first 10 minutes, but during the following 20 minutes this selection decreased. In the voluntary intake and digestibility trial that utilized six goats (26.4 kg live weight) to evaluate the inclusion of 25% of pigeon pea in a NTG-based diet, CP intake was markedly higher (P < 0.05) with legume supplementation. Dietary inclusion of the legume also tended to improve the digestibility of DM and CP but not at the P < 0.05 level of significance (56.7% vs. 51.4% and 58.7 vs. 51.2%); however, it did not affect NDF digestibility. As the pigeon pea plant increased in height, changes occurred in leafistem proportions and chemical composition. The IVDMD results suggest that the interval from 75 to 120 d of growth is favorable for possible utilization of pigeon pea as fresh forage in diets for small ruminants.
Chicken manure as soil amendment: Effect on yield and foliar nutrient content of tanier, and on chemical properties of the soil.
Authors: González-Vélez Agenol
Published: May 2020

During two consecutive years, chicken manure effects on yield and foliar nutrient content of tanier, and on chemical properties of the soil were evaluated. Treatments were 0, 25 and 50 t/ha of chicken manure incorporated into the soil prior to planting the first year. No significant differences in yield were found among the chicken manure treatments. This lack of differences was attributed to the high coefficient of variation found in the experiment. Nevertheless, with the application of 25 t/ha we observed a 17% and 122% increase in yield on the first and second year of the experiment, respectively, compared to yield in the check treatment. This increase in yield could be related to the ample benefit of applied organic matter, especially in low fertility soil. Only foliar nitrogen content showed a significant increase with the chicken manure application in both years, whereas potassium content increased with manure application during the second year. The application of chicken manure caused an increase of organic matter, electric conductivity and N, P, K and Mg content in the soil during the first year.
FORCIPOMYIA ERIOPHORA WILLISTON (DIPTERA: CERATOPOGONIDAE)NUEVO ECTOPARÁSITO DE PAPILIO DEMOLEUS L. (LEPIDOPTERA: PAPIUONIDAE) EN PUERTO RICO
Authors: Abreu-Rodríguez Edwin , Cardona-Colón Jesús , Cabrera-Asencio Irma
Published: May 2020

FORCIPOMYIA ERIOPHORA WILLISTON (DIPTERA: CERATOPOGONIDAE)NUEVO ECTOPARÁSITO DE PAPILIO DEMOLEUS L. (LEPIDOPTERA: PAPIUONIDAE) EN PUERTO RICO.
RELEASE OF 'BENÍQUEZ' WHITE BEAN (PHASEOLUS VULGARIS L.) CULTIVAR
Authors: Beaver James S. , Godoy-Lutz Graciela , Steadman James R. , Porch Timothy G.
Published: May 2020

RELEASE OF 'BENÍQUEZ' WHITE BEAN (PHASEOLUS VULGARIS L.) CULTIVAR
Limnological conditions at La Plata reservoir in Puerto Rico: 2008 to 2009
Authors: Martínez-Rodríguez Gustavo A. , Sotomayor-Ramírez David
Published: May 2020

Water column profiles of important limnological indicators (temperature, pH, dissolved oxygen, reduction potential, nutrients) were collected at the center section of La Plata reservoir in north-central Puerto Rico during 2008 and 2009. Temperatures at the surface ranged from values close to 25° C during the hemisphere winter months (December-February) to approximately 30° C during summer (June-August). Total nitrogen and phosphorus concentrations at the epilimnion (≤ 3-m depth) averaged 1.06 mg/L and 50 µg/L, respectively. Chlorophyll a values averaged 32.4 µg/L, which altogether with its nutrient status, would place this reservoir within the eutrophic-hypereutrophic categories. The annual average volume-weighed dissolved oxygen concentration for the reservoir was 3.02 mg/L, a reflection of the delicate ecological condition of this reservoir. The reservoir remains stratified during a large portion of the year (≥ eight months), inducing prevailing anoxic conditions at the hypolimnion. However, mixing because of incoming flow associated with intense rain events can be common. As a result, the mixing regime of this reservoir is best classified as discontinuous warm polymictic. Runoff associated with intense rainfall is probably the major contributor of hypolimnion dissolved oxygen and nutrient recharge at this reservoir. The distribution of iron (Fe) and manganese (Mn) is strongly influenced by the redox status of the system. Solid phases containing these metals exert a dominant role in the cycling of phosphate in the system.
UPAYA MENANGANI KERUSAKAN MACHINERY HATCH COVER HYDRAULIC UNTUK MEMPERLANCAR PROSES BONGKAR MUAT DI MV. SHANTHI INDAH
Authors: Murdiyanto Eko , Sitepu Firdaus
Published: May 2020

ABSTRAKMV. Shanthi Indah sendiri adalah salah satu kapal curah yang mengangkut batu bara yang dikelola oleh PT.KSE (Karya Sumber Energy), milik warga negara indonesia sendiri yangberoperasi diwilayah indonesia maupun internasional. Sehingga peralatan bongkar muat diataskapal MV.Shanthi Indah sangat penting untuk diperhatikan maka penulis merusmuskan masalahyaitu pananganan kerusakan machinery hatch cover hydraulic dan dampak kerusakan machineryhatch cover hydraulic untuk menjadi acuan dalam penelitian ini agar menjadi pembatas dalammembuat sebuah penelitian ini. Penelitian ini menggunakan metode deskriptif kualitatif dengan mendeskripsikan secaraterperinci saat pelaksanaan kegiatan bongkar/muat yang tertunda karena terjadinya kerusakanmachinery hatch cover hydraulic di kapal MV. Shanthi Indah. Pengumpulan data melaluiwawancara, observasi, studi pustaka, dan dokumentasi saat dikapal. Tekhnik pengolahan data yangdigunakan adalah fishbone analysis dan fault tree analysis. Machinery hatch cover hydraulic adalah salah satu alat yang perannya sangat vital untukkapal curah, Mesin palka hydrolik berfungsi untuk mengangkat roda pada palka denganmenggunakan cairan minyak hydrolik yang dimampatkan melalui pipe hydraulic dan di teruskan kejack hydraulic agar palka dapat terbuka. Hasil penelitian menunjukkan bahwa penyebab terjadinya kerusakan machinery hatch coverhydraulic di MV. Shanthi Indah adalah kotornya oil filter pada mesin yang menyebabkan cepatnyahigh pressure sehingga pipa hydrolik dapat pecah. Upaya penanganan kerusakan machinery hatchcover hydraulic adalah melakukan pengecekan dan perawatan secara teratur, memberikanpengarahan kepada crew tentang pengoperasian mesin palka hydrolik saat membuka palka denganbenar dan melakukan pengecekan oil filter pada machinery hatch cover hydraulic yang sudah kotor.
Peranan Roh Kudus dalam Pertumbuhan Iman Orang Percaya dan Penerapannya dalam Kelas Pendidikan Agama Kristen
Authors: Simanjuntak Ramses
Published: May 2020

Today, most of believers are still relying on their strenght and taught to do thier daily activities. Sometimes, they are forget that they still need helps and God’s intervention. Before Jesus ascended into heaven, He promised that he would send the Holy Spirit to His disciples (Luke 24: 49).  Not just that promise, He also promised that He would be with them until  the end of the age (Mat. 28: 20). These passages show that God takes the roles in believers daily life.