bluuebunny/crossref_metadata_2025 huggingface dataset:
Projection Methods for Dynamical Low-Rank Approximation of High-Dimensional Problems
Authors: Kieri Emil , Vandereycken Bart
Published: July 2018

We consider dynamical low-rank approximation on the manifold of fixed-rank matrices and tensor trains (also called matrix product states), and analyse projection methods for the time integration of such problems. First, under suitable approximability assumptions, we prove error estimates for the explicit Euler method equipped with quasi-optimal projections to the manifold. Then we discuss the possibilities and difficulties with higher-order explicit methods. In particular, we discuss ways for limiting rank growth in the increments, and robustness with respect to small singular values.
Factors Influencing Gas Generation Behaviours of Lump Coal Used in COREX Gasifier
Authors: Xu Runsheng , Zhang Jianliang , Wang Wei , Zuo Haibin , Xue Zhengliang
Published: July 2018

The influences of coal rank, particle size, temperature and gasifier atmosphere on the gas generation of lump coals used in COREX gasifier were investigated. The results showed that an increase in gasifier temperature and a decrease in particle size hardly affected the final mass loss of lump coals but strongly enhanced the gas generation rate. When the temperature was greater than 1000 °C, a decrease in coal rank increased the gas yield but had little effect on the gas generation rate. Moreover, the promotion ability of the atmosphere for the gas generation rate of lump coal from low to high was as follows: N2, CO2, CO and H2. Considering energy conservation, to improve the gas generation rate of the gasifier, the coal rank and particle size should be decreased first, and afterwards, an increase in reduction potential of the atmosphere in gasifier is also encouraged.
Evaluating the effect of storage conditions on milk microbiological quality and composition
Authors: Paludetti L.F. , Jordan K. , Kelly A.L. , Gleeson D.
Published: July 2018

In this study, the effect of storage temperature (2 or 4°C) on the composition of milk and microbiological load was investigated over 96 h. Milk samples were collected from farm bulk milk tanks after one complete milking and stored at 2 or 4°C over 96 h. Total bacterial count (TBC), psychrotrophic bacterial count (PBC) and proteolytic bacterial count (PROT) were affected by storage time and temperature and varied significantly between farms (P < 0.05). The levels of TBC, PBC and PROT bacterial count increased from 4.37 to 6.15 log cfu/mL, 4.34 to 6.44 log cfu/mL and 3.72 to 4.81 log cfu/mL, respectively, when the milk was stored for 96 h at 2°C. The milk samples stored at 4°C had higher increases in these bacterial counts after 72 h in comparison to milk samples stored at 2°C. The casein fraction content was lower in milk samples stored at 4°C, which could be due to high levels of PROT bacteria or enzyme activity in these samples. Milk stored for 96 h at 2°C has less impact on composition or processability parameters compared to milk stored at 4°C.
Mathematical Modeling of Ethane Cracking Furnace of Olefin Plant with Coke Formation Approach
Authors: Barza Amir , Mehri Behrouz , Pirouzfar Vahid
Published: July 2018

In this study, ethylene furnace modeling is carried out by ethane pyrolysis (thermal cracking or hydrocracking) method in Arya Sasol Petrochemical Company (ninth olefin unit, Assaluyeh, Iran), which includes the solution of kinetic equations and transfer phenomena, by the forward finite difference method in the MATLAB. Due to study and compare coke formation, a specific time period has been selected in equal segments and equations have been solved. It means that in a length segment of coil (Δz), momentum, energy as well as mass equations are solved, then the amount of precipitated coke in each length segment is achieved. With new efficient coil diameter calculating all mentioned approach will be repeated for next time segment. The results of this model have been compared with actual data and deviation has been reported. It was found that modeling approach is more capable to define the parameters of coke formation equations. The model has a good agreement between the values of prediction and experimental of in most cases.
Strategies for the reinterpretation of normative texts within the Hebrew Bible
Authors: Levinson Bernard M.
Published: July 2018

Contemporary constitutional theory remains divided between competing approaches to the interpretation of normative texts: between originalism or original intent, on the one hand, and living constitution approaches, on the other. The purpose of this article is to complicate that problematic dichotomy by showing how cultures having a tradition of prestigious or authoritative texts addressed the problem of literary and legal innovation in antiquity. The study begins with cuneiform law from Mesopotamia and the Hittite Empire, and then shows how ancient Israel’s development of the idea of divine revelation of law creates a cluster of constraints that would be expected to impede legal revision or amendment. The well-known Decalogue, or Ten Commandments, provides a valuable test-case, with its normative statement that God punishes sinners across generations (vicariously extending the punishment due them to three or four generations of their progeny). A series of inner-biblical and post-biblical responses to that rule demonstrates, however, that later writers were able to criticize, challenge, reject, and replace it with the alternative notion of individual accountability. The article will provide a series of close readings of the texts involved, drawing attention to their legal language and hermeneutical strategies. The conclusions stress the remarkable freedom to modify ostensibly normative statements available to ancient judicial interpreters, despite the expected constraints of a formative religious canon attributed to divine revelation.
Stability, Bifurcation and Optimal Control Analysis of a Malaria Model in a Periodic Environment
Authors: Panja Prabir , Kumar Mondal Shyamal , Chattopadhyay Joydev
Published: July 2018

In this paper, a malaria disease transmission model has been developed. Here, the disease transmission rates from mosquito to human as well as human to mosquito and death rate of infected mosquito have been constituted by two variabilities: one is periodicity with respect to time and another is based on some control parameters. Also, total vector population is divided into two subpopulations such as susceptible mosquito and infected mosquito as well as the total human population is divided into three subpopulations such as susceptible human, infected human and recovered human. The biologically feasible equilibria and their stability properties have been discussed. Again, the existence condition of the disease has been illustrated theoretically and numerically. Hopf-bifurcation analysis has been done numerically for autonomous case of our proposed model with respect to some important parameters. At last, a optimal control problem is formulated and solved using Pontryagin’s principle. In numerical simulations, different possible combination of controls have been illustrated including the comparisons of their effectiveness.
Förderung des kritischen Denkens und des Fremdverstehens im DaF-Unterricht am Beispiel von Texten aus deutschen Straßenzeitungen
Authors: Winter da Silva Christina
Published: July 2018

Im ersten Teil des folgenden Aufsatzes wird die Situation des DaF-Unterrichts in Brasilien beschrieben und der Ansatz der critical literacy präsentiert, der den Fremdsprachenunterricht auch als Raum zur Förderung kritischen Denkens versteht und aus der brasilianischen Fremdsprachendidaktik kaum wegzudenken ist. Im zweiten Teil wird eine didaktische Sequenz zur Förderung des kritischen Denkens und des Fremdverstehens vorgestellt, bei der Texte aus Straßenzeitungen, die von obdachlosen Menschen geschrieben wurden, eingesetzt wurden. Außerdem wird die Erstellung von Profilen obdachloser Menschen aus einem der DACHL-Länder sowie der gedankliche Transfer zum Heimatland der Lernenden beschrieben. Die wichtigsten Studienergebnisse werden am Ende präsentiert.
Untreated congenital hypothyroidism due to loss to follow-up: developing preventive strategies through quality improvement
Authors: Matlock Kristal Anne , Corathers Sarah Dawn , Yayah Jones Nana-Hawa
Published: July 2018

Background

Children with congenital hypothyroidism (CH) are at risk for preventable intellectual disability without adequate medical management. The purpose of this manuscript is to discuss quality improvement (QI)-based processes for improving provider adherence to practice guidelines and ultimately identifying at-risk patients with chronic illness prior to the occurrence of adverse events.

Methods

Our study population included patients ages ≤3 years diagnosed with CH; lost to follow-up was defined as >180 days since last evaluation by an endocrinology provider. Iterative testing of interventions focused on establishing standardized care through (1) registry-based identification, (2) scheduling future appointments during current visits, (3) outreach to patients lost to follow-up and (4) provider and family education of current practice guidelines.

Results

A population-validated, electronic medical registry identified approximately 100 patients ages ≤3 years diagnosed with CH; initially, 12% of patients met criteria for lost to follow-up. Through serial testing of interventions, the rate of loss to follow-up declined to the goal of <5% within 8 months. Additional measures showed improvement in provider adherence to standard of care. All patients identified as lost to follow-up initially were seen within the first 3 months of intervention.

Conclusions

Applying QI methodology, a multidisciplinary team implemented a process to identify and contact high-risk CH patients with inadequate follow-up. Focused interventions targeting population management, scheduling and patient/provider education yield sustained improvement in the percentage of patients with a chronic condition who are lost to follow-up.
Mycenaean e-pi-ko-wo and alphabetic Greek ἐπίκουρος revisited
Authors: Mahoney Kyle
Published: July 2018

This paper revisits the etymology of Greek ἐπίκουρος, which for over a century has been analyzed as a compound of ἐπί and an otherwise non-extant verbal root *κορσο-, from an Indo-European root familiar in Latin currō ‘run’. After reviewing the linguistic, epigraphic, and philological evidence, I conclude that this etymology is untenable. From here I turn to the Linear B data and demonstrate that the e-pi-ko-wo of the Pylian o-ka texts (ca. 1200 B.C.) should be interpreted as /epikor woi/; this presents us with the linguistic antecedent of ἐπί- κουρος, which should be etymologized as a prepositional Rektionskompositum, where ἐπί governs κόρϝος (‘he who is in close proximity to the κόρϝος (warrior)’ / ‘he who is attached to/accompanying the warriors’). Early in the Archaic period, this older Mycenaean term was replaced by a new coinage - σύμμαχος - which more appropriately described a military relationship binding one Greek polis to another. These conclusions are supported by early epic usage, historical linguistic analysis, and a full study of the Linear B texts in question. This new etymology has stimulating archaeological correlates and exemplifies the importance and broad applications of the Linear B texts for the reconstruction of Greek prehistory and society and our understanding of the epic tradition
Observations pour une datation de la tablette KN V(1) 114+
Authors: Monti Orazio
Published: July 2018

L’association, dans la tablette lineaire B KN V(1) 114+, du terme wa-tu (wastu ‘ville’) avec le toponyme d’Amnisos, l’examen des pieces archeologiques trouvees dans ce site et l’analyse du contexte de la ≪Room of the Chariot Tablets≫ - ou cette tablette a ete trouvee - indiquent la possibilite que KN V(1) 114+ ait ete redigee au cours de la phase initiale du Minoen Recent IIIA2, peu avant la ‘destruction MR IIIA2 initial’ du palais de Cnossos
Complete albinism inOxymycterus dasytrichus(Schinz 1821) (Rodentia: Cricetidae)
Authors: Stumpp Rodolfo , Casali Daniel , Cunha Heitor , Paglia Adriano
Published: July 2018

Reports of albinism are available for several groups of mammals, including the secondmost diverse family of Rodentia, Cricetidae. Nonetheless, in South America, where cricetid rodents are the most representative of the small mammals, both in richness and abundance, few records of albinism exist. Here, we document the first case of albinism for the cricetidOxymicterus dasytrichus, and compare the skin, hair and skull morphology of the albino with specimens of the regular coat color pattern ofO. dasytrichuscollected in the state of Minas Gerais, where the albino specimen was collected. Despite the marked external morphological differences observed in the hair and skin colors, cranial measurements indicate that no salient differences can be observed when comparing particular measures for the skulls of albino and non-albino specimens, neither through a multivariate statistical analysis. We also briefly discuss the relative rarity of complete albinism in Neotropical rodents.
Circular action treatment (CAT): a new strategy for mechanical treatment of old corrugated containers II – comparison of CAT with low-consistency beating
Authors: Kim Jin-Doo , Lee Tai-Ju , Lee Jae-Hoon , Ryu Jeong-Yong , Won Jong-Myoung
Published: July 2018

In Korea, old corrugated containers (OCC) are a common material for paperboard production. Unfortunately, the quality of Korean OCC (KOCC) is low due to irreversible effects such as hornification that could occur by repeated drying and wetting during paper recycling. Generally, beating is a fibrillation method for improving paper strength. However, beating also results in fiber shortening and excessive fines. Circular action treatment (CAT) is a new method designed for the mild mechanical treatment of KOCC containing undesirable materials and fines. The effect of CAT and low-consistency beating on KOCC were analyzed at various conditions. The results show that increased revolution speed and passing length of CAT resulted in higher water retention values and paper strength without a sudden change in the freeness, fiber length and fines content. While paper strength was higher upon beating compared to the case of CAT, the intensive beating action in the former resulted in fiber damage, generating excessive fines and decreasing fiber length. The fines generated by beating might be negative to retention and drainage in wet-end. Therefore, CAT is a promising new strategy for KOCC mechanical treatment, and an increase in the revolution speed and passing length of CAT could improve KOCC quality.
Generalized convergence analysis of the fractional order systems
Authors: Ruzitalab Ahmad , Farahi Mohammad Hadi , Erjaee Gholamhossien
Published: July 2018

The aim of the present work is to generalize the contraction theory for the analysis of the convergence of fractional order systems for both continuous-time and discrete-time systems. Contraction theory is a methodology for assessing the stability of trajectories of a dynamical system with respect to one another. The result of this study is a generalization of the Lyapunov matrix equation and linear eigenvalue analysis. The proposed approach gives a necessary and sufficient condition for exponential and global convergence of nonlinear fractional order systems. The examples elucidate that the theory is very straightforward and exact.
Complementary wave solutions for the long-short wave resonance model via the extended trial equation method and the generalized Kudryashov method
Authors: Cimpoiasu Rodica , Pauna Alina Streche
Published: July 2018

In this paper the nonlinear long-short (LS) wave resonance model is analyzed through a new perspective. We obtain the classification of exact solutions by making use of the complete discrimination system for the trial equation method and through the generalized Kudryashov method. These methods do generate complementary wave solutions such as bright and dark solitons, rational functions, Jacobi elliptic functions as well as singular and periodic wave solutions. Some among them extend the already reported solutions through other techniques. For some types of solutions adequately graphical representations are displayed. The concerned methods could also be used in order to study other interesting nonlinear evolution processes in n dimensions.
Attitude as mediation: Peritextual commentary in the translation of the Platform Sutra
Authors: Yu Hailing , Wu Canzhong
Published: July 2018

As explicit expression of attitude is restrained in translations of canonical texts, the peritext often becomes a place for the translator’s attitudinal mediation. Unlike previous studies where the translational peritext is under the name of the translator, this study presents a special case in which the peritext attached to the translation of thePlatform Sutra, a religious text, is attributed to the translator’s teacher, whose lectures in the source language served as the basis of the peritextual commentary. By adopting the appraisal framework, the study demonstrates how explicit attitudes, especially judgements, are instilled in the commentary to direct the readers to see the protagonist Huineng as a hero and many other characters as villains. Despite the apparent attribution of the commentary to the translator’s teacher, the translator plays an active role in reorganizing, translating and sometimes modifying the attitudinal expressions from the original lectures. Putting the commentary under the name of the translator’s teacher functions to further enhance the mediating power of the attitude. The specialness of the case study will make it complementary to existing studies on attitude as mediation.
Effects of Geometric Design on Early-Age Thermal Behavior of Drilled Shaft
Authors: Han Sangyoung , Lawrence Adrian M. , Tia Mang , Bergin Michael
Published: July 2018

This article presents an investigation on the early-age thermal behavior of drilled shafts with different geometric dimensions through numerical analysis. Finite-element models by using DIANA software were developed to analyze the thermal behavior of drilled shafts. In order to validate the finite-element model, four concrete drilled shafts were constructed and evaluated under Florida conditions for monitoring their actual thermal behavior. The calculated temperatures from the analytical model matched well with the measured values from the constructed shafts. All the drilled shafts with a diameter greater than 1.83 m (6 ft) produced a high maximum temperature and a maximum temperature differential which failed the allowable temperature set by the American Concrete Institute and the Florida Department of Transportation to prevent thermal cracking. Also, it was found that the dimension of the drilled shaft had the greatest influence on the maximum temperature inside a shaft. Analysis was performed to investigate whether the use of drilled shafts with a centroid void in the shaft could reduce the maximum temperature and maximum temperature differential. The results indicated that this is a viable alternate shaft design for controlling the maximum temperature and maximum temperature differential in concrete drilled shafts at an early age.
Plane Stress/Strain Compressive Behavior of Perlite Composite Foam
Authors: Arifuzzaman Md , Kim Ho Sung
Published: July 2018

The novel mechanical behavior of perlite/sodium silicate composite foam, a type of syntactic foam made of non-spherical particles, subjected to compression is studied in relation to plane stress and plane strain conditions. Plane stress and plane strain conditions were conceptualized and experimentally verified using various specimen sizes with aspect ratios ranging from 0.25 to 1.5 for compressive strength and modulus. Two distinctive sets of compression properties dependent on plane stress/strain were produced for practical characterization. The greatest compressive strength occurring under plane strain dominant condition was experimentally found to be ∼50 % greater than the lowest value occurring under plane stress dominant condition. The greatest compressive modulus occurring under plane stress dominant condition was also experimentally found to be ∼ 200 % greater than the lowest value occurring under plane strain dominant condition. A new failure mode under plane strain dominant condition for perlite foam was found to be the progressive densification of individual perlite particles.
Device-technological simulation of the magnetosensitive sensor with integrated magnetic concentrator
Authors: Stempitsky V. R. , Ha Dao
Published: July 2018

The paper presents results on research and optimization on the basis of device-technological modeling of the structural and operational characteristics of the magnetosensitive sensor with a disk-shaped integrated magnetic concentrator (IMC).
The high magnetic permeability of the IMC material provides a high value of the induction of the magnetic field along its edges, which leads to a significant enhancement of the applied external field. The IMC plays the role of a magnetic amplifier, and also affects the signal-to-noise and signal-to-bias ratios; the magnetic gain depends not only on the size of the IMC, but also on its shape.
This research is devoted to the development of a disc-shaped magnetic concentrator integrated into the Hall sensor. The concentrator has a high magnetic flux gain and can be used in 3D magnetic field recording systems.
Analysis of the geometric dimensions, deflection angle and the material of the integrated magnetic concentrator influence on the characteristics of a three-dimensional magnetic field sensor showed that the inclusion of a ferromagnetic concentrator in the Hall sensor design provides a significant (up to 10 times) increase in the magnetic flux gain. This makes it possible to use the investigated sensor designs to detect weak magnetic fields (from 0.01 µT to 2 mT).
It is shown that a supermindure integrated magnetic disc-shaped concentrator with a diameter of D = 200 µm, a thickness of l = 10 µm and an angle of deflection of  = 60° provides a magnetic flux gain G = 10.81 with a maximum external magnetic field of B0 = 120 mT.
The obtained results indicate the prospects of using the proposed constructive solution for the practical manufacture of three-dimensional sensors of weak magnetic fields with a magnetic sensitivity up to 3026 V/(A∙T) along the sensor surface. The type of sensor devices studied extends the scope of Hall sensors as an elemental base of medical equipment, equipment for magneto-resonant imaging (MRI), and also in instruments for geological and geodetic research.
Scintillation materials based on solid solutions ZnSxSe1–x
Authors: Trubaieva O. G. , Chaika M. A. , Galkin S. M. , Lalayants A. I. , Nepokupnaya T. A.
Published: July 2018

Composite materials based on ZnSxSe1–x solid solutions are promising materials for gamma and X-ray detectors. However, influence of compositions and particle size on scintillation properties is unclear, which prevents their application. This paper reports on the complex study of microcrystalline ZnSxSe1–x powdered scintillations, prepared by solid phase synthesis from ZnS and ZnSe initial compounds. ZnSxSe1-x solid solutions were obtained in the range of x from 0.07 to 0.86 and in the following sizes: 200—250, 140—200, 140—80 µm, and less than 80 µm.
X-ray diffractions of powder ZnSxSe1–x shows formation of a cubic lattice of sphalerite structure. ZnSxSe1–x powders demonstrate a presence of a luminescence band in the 590—615 nm regions, while an increase in sulfur concentration leads to a shift of the maximum intensity of X-ray induced luminescence to the short-wave region, which is associated with an increase of the band gap width. The best parameters of X-ray induced luminescence are obtained for the solid solution with 39 at.% of sulfur. The ZnS0,39Se0,61 solid solutions obtained under these conditions have an X-ray induced luminescence intensity that is 4 times higher than that of ZnSe(Al) single crystal and a relatively low level of afterglow.
In ZnSxSe1–x solid solutions, increasing of particle size leads to shifts of the X-ray induced luminescence to the longwave region. The highest intensity of the X-ray induced luminescence corresponds to the ZnS0,39Se0,61 composition with the particle size of less than 80 µm. Also, ZnS0,39Se0,61 solid solutions, with particle size less than 80 microns, are more homogeneous in composition, which is why the process of solid phase reaction in them passes more efficiently.
It is shown that the ZnSxSe1-x composite scintillators can be used as gamma and X-ray detectors. It has been established that the effectiveness of these materials depends on their composition. ZnS0,5Se0,5 and ZnS0,39Se0,61 composites demonstrate the best scintillation characteristics, with twice as high an efficiency as that of the «commercial» ZnSe(Al) composite.
Planfulness: A Process-Focused Construct of Individual Differences in Goal Achievement
Authors: Ludwig Rita M. , Srivastava Sanjay , Berkman Elliot T.
Published: July 2018

Goal pursuit outcomes are partly caused by the way people think about goals. Specific patterns of thought can increase the likelihood of goal achievement, such as generating heuristics to automate goal-related decision making, orienting present-moment attention to the future to increase the salience of a distal goal, and contrasting the anticipated enjoyment of an achieved goal with the progress required to complete it. However, it is unknown whether there are stable individual differences in the tendency to deploy particular meta-cognitions during goal pursuit. A tool to assess such differences would help to identify and intervene on personal barriers to goal progress. Here, we define a new construct within the conscientiousness domain—planfulness—that captures a person’s proclivity to adopt efficient goal-related cognition in pursuit of their goals. We hypothesize that planfulness consists of three interrelated facets representing distinct mental processes, temporal orientation (TO), cognitive strategies (CS), and mental flexibility (MF), and that planfulness predicts goal achievement on an individual basis. We developed a 30-item Planfulness Scale with three subscales tested and refined across 5 studies and 10 samples (total unique N = 4,318) using iterative exploratory and confirmatory factor analysis on data collected from both student and on-line samples. The Planfulness Scale demonstrated both convergent and discriminant validity when compared to other measurements, and scale scores predicted goal progress in a longitudinal study. We find that planfulness is a useful new construct for self-regulation research, and the 30-item Planfulness Scale to be a valid and reliable measurement of real-world goal achievement.
The Legal Regulation of Neighbourly Water use in Ukraine: Development Prospects
Authors: Muronenko Ihor
Published: July 2018

The article is devoted to some questions of the legal adjusting of neighbourliness relations. Neighbourly water use should be defined as the use of water resources aimed at meeting the needs of owners or tenants of neighbouring land parcels. The regulation of neighbourly water use has historically been an inseparable part of neighbour law. Regulations of this kind were contained in many historically significant Ukrainian legal documents, including “The Statutes of the Grand Duchy of Lithuania”. Currently, the regulation of the use of water resources mainly comes under the sphere of public law. Consequently, the current Land Code of Ukraine does not contain regulations of this kind. Nevertheless, a study of international legislation and regulation policies on neighbourly relations emphasizes the necessity to legislate on the private aspects of neighbourly water use. The findings of the study has made it possible to formulate the proposals aimed at improving the current legislation on this issue.
Legal Regulation of Environmental Impact Assessment in Ukraine: Current State
Authors: Shparyk Nazar
Published: July 2018

The article analyzes the main provisions of the new Law of Ukraine “On Environmental Impact Assessment”. The terminology, procedure and mechanisms for environmental impact assessment are described. The possible problems that the parties will face in practice undergoing an environmental impact assessment procedure are reflected. The advantages and disadvantages of the new Law are highlighted and possible problems in the implementation of the norms of the Law are analyzed.
Contributing to Nature’s Recovery through Urban Agriculture
Authors: Matthews Jamie , Afshin Akhtar-Khavari
Published: July 2018

The paper analyses the legally established practice of agriculture has been forced out of the urban environment as land value increases with higher population densities. It’s stated, that cities and surrounding urban environments have grown dependent upon regional areas and industrial agricultural practices to provide food for their increasing populations. Most commonly, urban agriculture is practiced by third world nations as a first line of defence against hunger and malnutrition or as poverty alleviation in times of economic stress. This paper argues that the practice of urban agriculture contributes to vital environmental recovery necessary in this, the geological age of the Anthropocene. As human activity continues to impact the functioning of earth systems at the planetary scale, we must actively assist nature to recover rather than assume that our existing environmental protection and conservation strategies are effective in preserving the natural environment.
Morphology, phase composition and radiological properties of fly ash obtained from the Burshtyn thermal power plant
Authors: Mironyuk I.F. , Tatarchuk T.R. , Vasylyeva H.V. , Yaremiy I.P. , Mykytyn I.M.
Published: July 2018

The physic-chemical properties of ash extracted from smoke during the combustion of coal at the Burshtyn thermal power plant were investigated. The particles formed in the flame are crystallized glass beads with a size of 0.8–600 μm. It was found that the ash particles are heterogeneous in their chemical composition. The mass content of the ferric oxides can vary from 2.1% to 96.4%, however, despite this, the Al2O3/SiO2 ratio in the glass balls remains constant at a value of 0.47±0.02. Phase analysis confirmed the presence of α-quartz particles (~ 62 wt%), mullite (~ 32 wt%) and α-FeOOH, α-Fe2O3 and Fe3O4 mixtures (totaling 6 wt%). Radiological studies have revealed higher β- and γ-activity of fly ash, selected from the dump, compared with the fly ash from the electro-filter. This is due to the accumulation of 214Pb and 214Bi radionuclides particles formed on the surface of the particles due to due to decay of 222Rn.
Novel Ti2CuCx and Ti3Cu2Cx Carbides Obtained by Sintering of Products of Mechanochemical Synthesis of Ti, Cu and Carbon Nanotubes
Authors: Nakonechna O.I. , Belyavina N.N. , Dashevskyi M.M. , Ivanenko K.O. , Revo S.L.
Published: July 2018

Mechanical alloying of the elemental powder mixture of titanium and copper (particle size of both powdersis about 40 μm, purity is not less than 99.6% wt. %) was performed in a high energy planetary ball mill to obtainTi:Cu (2:1 and 3:1) compositions. An addition of 1 vol. % of multiwalled carbon nanotubes (MWCNT, averagediameter 10-20 nm) into Ti-Cu charge results in a formation of nanoscaled Ti2CuCx and Ti3Cu2Cx carbides(containing 0.5 and 4.2 at.% of carbon and 30.8 and 37.5 at.% of copper, respectively). These carbides havesynthesized for the first time. Nature of interaction of the charge components at processing in a ball mill hasstudied on test samples using a complex of X-ray techniques. These techniques include a full-profile analysis forthe primary processing of diffractograms obtained with DRON-3M apparatus; qualitative and quantitative phaseanalysis for determining the phase composition of the products of synthesis; X-ray structural analysis to verifyand refine the structural models; Williamson-Hall method for determining the grain sizes. The Vickers hardnessof compacted (by sintering) samples with 20.1 and 27.3 at. % Cu varies substantially within (6.9-7.1) GPa. Thus,the average microhardness of synthesized materials is 7 times higher than that of pure titanium microhardness.
Presentación
Authors: Casalino Sen Carlota
Published: July 2018

En esta oportunidad nos complace enormemente presentar el número 3 de la Revista ISHRA, órgano oficial del Instituto Seminario de Historia Rural Andina. Se trata de una publicación que refleja los cambios que están ocurriendo dentro del SHRA-ISHRA, de adaptarnos a los lineamientos de investigación establecidos por el Vicerrectorado de Investigación y Posgrado, así como al proceso de inserción a la Facultad de Ciencias Sociales, según lo establecido por el Estatuto de la Universidad vigente. Una estrategia central de San Marcos para desarrollar la actividad de investigación es la conformación de Grupos de Investigación. Estos GI son unidades funcionales —tal como señala la respectiva directiva— de duración temporal y renovable integrados por docentes, alumnos y tesistas de la universidad que se reúnen para desarrollar actividades de investigación, desarrollo e innovación sobre un tema específico. De manera particular, en el ISHRA los grupos de investigación se han convertido en un círculo virtuoso que ha permitido que investigadores de diversas disciplinas encuentren un espacio fructífero para desarrollar conjuntamente actividades de investigación con un fuerte intercambio de saberes.
Editorial
Authors: Silva Sifuentes Jorge Elías T.
Published: July 2018

El Instituto Seminario de Historia Rural Andina de la Facultad de Ciencias Sociales de la Universidad Nacional Mayor de San Marcos se complace nuevamente en poner a disposición del público lector un volumen más que se suma al medio millar de números que el Seminario, hoy Instituto, ha publicado de manera sostenida y consistente desde la década de 1960. Como se recordará el Artículo 37° del Estatuto de la Universidad Nacional Mayor de San Marcos, expedido por R.R. 03013-R-16 del 6 de junio del 2016, dispuso incorporar el Seminario de Historia Rural Andina a la Facultad de Ciencias Sociales bajo el nombre de Instituto Seminario de Historia Rural Andina, el mismo que conjuntamente con el Instituto de Investigaciones Histórico Sociales «depende del Vicedecanato de Investigación y Posgrado».
Fiestas, rituales y nuevas TIC. Usos políticos y religiosos del Internet y el celular en la Comunidad de Yanque (Caylloma, Arequipa)
Authors: Sánchez Dávila Mario
Published: July 2018

Este artículo se propone comprender, a través de un enfoque cualitativo y etnográfico, los usos políticos y religiosos de las nuevas tecnologías de información y comunicación (o nuevas TIC) en la comunidad de Yanque (Caylloma, Arequipa, Perú), encontrando que el Internet y el celular, lejos de desintegrar la comunidad, son utilizados como un medio para preservar las tradiciones de su cultura local, pero también son usados como una herramienta para reforzar el estatus y el prestigio de los grupos de poder, y, por ello, para reafirmar las jerarquías y desigualdades dentro del campo social estratificado de Yanque.
Acerca de computación y sus líneas de investigación
Authors: Delgadillo Rosa , Fermín-Pérez Armando
Published: July 2018

Las tecnologías de la información y comunicaciones se encuentran en cada actividad humana y en todos los campos de la ciencia, ingeniería, negocios entre otros, tanto así que la computación se ha convertido en un conocimiento básico que todos deben conocer.
Un modelo de self-management para mejorar la eficiencia de la productividad en la administración de una base de datos
Authors: Del Mar Arzola Jorge L.
Published: July 2018

En la actualidad, las organizaciones enfrentan dos graves problemas con respecto a la gestión de base de datos. El primero de los problemas es el aumento en el volumen de los datos y la complejidad de los requerimientos de información, el segundo problema es que los administradores de base de datos con buenos conocimiento y amplia experiencia son un recurso cada vez más escaso y sus costos se han elevado. Debido a estos problemas, en los últimos años, los proveedores de software de base de datos buscan automatizar las funciones de la Administración de Base de Datos y existen diversos enfoques para dar solución a este problema. En el presente trabajo se propone un modelo para apoyar a la Administración de Base de Datos basado en el concepto de Self-Management, el modelo da énfasis a los requerimientos particulares de una organización buscando que la función de Administración de Base de Datos sea más efectiva. El modelo propuesto se ha implementado utilizando un software que permite reducir los costos que ocasionan los problemas en aplicaciones con base de datos. Además, para aplicar el modelo propuesto se realizaron pruebas en una organización de producción.
Semidiscrete Integrable Nonlinear Schrӧdinger System with Background-Controlled Intersite Resonant Coupling. Short Summary of Key Properties
Authors: Vakhnenko O. O.
Published: July 2018

The most featured items characterizing the semidiscrete nonlinear Schr¨odinger system with background-controlled intersite resonant coupling are summarized. The system is shown to be integrable in the Lax sense that makes it possible to obtain its soliton solutions in the framework of a properly parametrized dressing procedure based on the Darboux transformation accompanied by the implicit form of B¨acklund transformation. In addition, the system integrability inspires an infinite hierarchy of local conservation laws, some of which were found explicitly in the framework of the generalized recursive approach. The system consists of two basic dynamic subsystems and one concomitant subsystem, and its dynamics is embedded into the Hamiltonian formulation accompanied by the highly nonstandard Poisson structure. The nonzero background level of concomitant fields mediates the appearance of an additional type of the intersite resonant coupling. As a consequence, it establishes the triangular-lattice-ribbon spatial arrangement of location sites for the basic field excitations. At tuning the main background parameter, we are able to switch system’s dynamics between two essentially different regimes separated by the critical point. The physical implications of system’s criticality become evident after a rather sophisticated procedure of canonization of basic field variables. There are two variants to standardize the system equal in their rights. Each variant is realizable in the form of two nonequivalent canonical subsystems. The broken symmetry between canonical subsystems gives rise to the crossover effect in the nature of excited states. Thus, in the under-critical region, the system supports the bright excitations in both subsystems; while, in the over-critical region, one of the subsystems converts into the subsystem of dark excitations.
Analytical Approach for Calculating the Chemotaxis Sensitivity Function
Authors: Vasilev A. N.
Published: July 2018

We consider the chemotaxis problem for a one-dimensional system. To analyze the interaction of bacteria and an attractant, we use a modified Keller–Segel model, which accounts for the attractant absorption. To describe the system, we use the chemotaxis sensitivity function, which characterizes the nonuniformity of the bacteria distribution. In particular, we investigate how the chemotaxis sensitivity function depends on the concentration of an attractant at the boundary of the system. It is known that, in the system without absorption, the chemotaxis sensitivity function has a bell shape maximum. Here, we show that the attractant absorption and special boundary conditions for bacteria can cause the appearance of an additional maximum in the chemotaxis sensitivity function. The value of this maximum is determined by the intensity of absorption.
МАСА ТА ВОЛОГІСТЬ ХВОЇ СОСНИ ЗВИЧАЙНОЇ У ДЕРЕВ РІЗНИХ КАТЕГОРІЙ СМОЛОПРОДУКТИВНОСТІ
Authors: Osadchuk L.S.
Published: July 2018

Наведено результати дослідження особливостей нагромадження маси та вологості хвої для визначення репрезентативних показників високосмолопродуктивних форм сосни звичайної (Pinus sylvestris L.). Встановлено, що дерева з високою смолопродуктивністю за абсолютно сухою масою хвоїнки перевищують дерева з низькою продуктивністю. Водночас, вологість хвоїнок високосмолопродуктивних дерев є істотно нижчою відносно дерев із низькою продуктивністю. Виявлено значний кореляційний зв'язок смолопродуктивності з масою хвоїнок у низькосмолопродуктивних дерев. Знижена вологість хвої у високосмолопродуктивних дерев свідчить, що у них значно активніше відбувається вуглеводнева спрямованість обміну речовин.
ЕКОЛОГІЧНА РОЛЬ ОМОЛОДЖУВАЛЬНОГО ОБРІЗУВАННЯ ДЕРЕВ РОДУ TILIA L. У ВУЛИЧНИХ НАСАДЖЕННЯХ ЖИТОМИРА
Authors: Oleksiychenko N.O. , Matkovska S.I.
Published: July 2018

Наведено результати вивчення впливу омолоджувального обрізування на дерева роду Tilia L., визначено фітосанітарний стан представників видів липи серцелистої (Тilia cordata Mill.) та липи крупнолистої (Тilia platiphyllos Scop.) на центральних вулицях Житомира. Встановлено, що глибоке обрізування крони дерев липи з роками негативно впливає на життєвий стан дерев, позначається на їхній декоративності, прискорює процеси старіння та скорочує середню тривалість життя. Виявлено, що дерева роду Тilia L., які піддавались глибокому обрізуванню крони, найчастіше уражуються трутовиком справжнім (Phellinus igniarius (L.) Quél. та трутовиком лускатим (Polyporus squamosus (Huds.) Fr.).
СТАТИСТИЧНІ ПЕРЕДУМОВИ МОДЕЛЮВАННЯ РОСТУ МОДАЛЬНИХ ДЕРЕВОСТАНІВ ДУБА ЗВИЧАЙНОГО ВЕГЕТАТИВНОГО ПОХОДЖЕННЯ ЛІСОСТЕПУ УКРАЇНИ
Authors: Bala O.P. , Khan E.Yu.
Published: July 2018

Проаналізовано основні таксаційні показники повидільної бази даних дубових деревостанів Лісостепу України ВО "Укрдержліспроект" станом на 01.01.2011 р. За допомогою кластерного аналізу здійснено класифікацію та групування даних та з використанням t-критерію Ст'юдента встановлено, що вагомий вплив на ріст дуба звичайного мають його походження та умови місцезростання. Статистично підтверджено значущість різниці між таксаційними показниками деревостанів дуба звичайного насіннєвого та вегетативного походження для ліво- та правобережної частин лісостепової зони.
ВПЛИВ ВІКУ МАТОЧНИХ РОСЛИН НА РЕГЕНЕРАЦІЙНУ ЗДАТНІСТЬ СТЕБЛОВИХ ЗЕЛЕНИХ ЖИВЦІВ ФУНДУКА (CORYLUS DOMESTICA KOSENKO ЕT OPALKO)
Authors: Balabak O.A.
Published: July 2018

Представлено результати досліджень впливу віку маточних рослин на регенераційну здатність стеблових живців сортів фундука, характеристику вкорінених живців, ріст і розвиток надземної частини. Встановлено, що живці мають різну регенераційну здатність залежно від сорту, строків заготівлі і висаджування на вкорінення, частини пагона та віку маточних рослин. Показано, що добір маточних рослин оптимального віку істотно впливає на збільшення вкорінення живців різних сортів фундука та призводить до покращення ризогенної активності. В Україні стеблові живці досліджуваних сортів фундука потрібно заготовляти з 5‑9-річних маточних рослин.
ПІДСУМКИ ВИРОЩУВАННЯ ВЕГЕТАТИВНИХ ПІДЩЕП ДЛЯ ФОРМОВОГО РІЗНОМАНІТТЯ MORUS ALBA L.
Authors: Vitenko V.A.
Published: July 2018

Подано основні результати багаторічних досліджень з вирощування вегетативних підщеп для декоративного різноманіття Morus alba L.: Morus alba ′Pendula′, M. a. ′Globosa′, M. a. ′Pyramidalis′, M. a. ′Contorta′, M.a. ′Macrophylla′, M. a. ′Tatarica′. Встановлено найбільш оптимальні строки живцювання Morus alba L. та вплив стимуляторів росту на регенераційну здатність зелених і здерев'янілих живців Morus alba L. Практично обґрунтовано (з економічним підґрунтям) доцільність вирощування вегетативного садивного матеріалу (щеп) для декоративних форм Morus alba L. у розсадниках нашої країни.
ОСОБЛИВОСТІ АВТОВЕГЕТАТИВНОГО РОЗМНОЖЕННЯ ДЕКОРАТИВНИХ ФОРМ THUJA OCCIDENTALIS L.
Authors: Lisoviy M.М.
Published: July 2018

Наведено характеристику найпоширеніших в озелененні декоративних форм Thuja occidentalis L. Представлено характеристику проведених експериментальних досліджень з вегетативного розмноження живцюванням таких декоративних форм досліджуваного виду: 'Aurea', 'Smaragd', 'Bodmeri', 'Danica nana' та 'Elegantissima' із застосуванням трьох найбільш популярних комерційних стимуляторів укорінення. Детально описано використану методику досліджень: терміни заготівлі живців та проведення експериментів, види застосованих стимуляторів і тип ґрунтового субстрату. Узагальнено, проаналізовано та наведено отримані результати.
ОЦІНЮВАННЯ ТИПОЛОГІЧНОГО АСПЕКТУ ВЕДЕННЯ ГОСПОДАРСТВА НА ТЕРИТОРІЇ ДЕРЖАВНОЇ ОРГАНІЗАЦІЇ "РЕЗИДЕНЦІЯ "ЗАЛІССЯ"
Authors: Lakyda M.O.
Published: July 2018

За результатами аналізу лісовпорядкувального матеріалу із бази даних "Лісовий фонд України" оцінено типологічну структуру лісів Державної організації "Резиденція "Залісся". Проаналізовано основні типи лісу з переважанням таких деревних видів: сосна звичайна, дуб звичайний, береза повисла, вільха чорна тощо. Виконано групування за такими показниками: трофотопи, гігротопи, групи віку, типи лісу та класи бонітету. Сформульовано висновок щодо проведення діяльності з урахуванням типологічних особливостей.
СОЦІАЛЬНО-ЕКОНОМІЧНІ ПРИЧИНИ ПРАВОПОРУШЕНЬ У ЛІСАХ УКРАЇНСЬКИХ КАРПАТ
Authors: Henyk Ya.V. , Henyk O.V. , Kaspruk O.I. , Lutsiv N.G.
Published: July 2018

Представлено результати досліджень щодо визначення соціально-економічних причин правопорушень у лісових екосистемах Українських Карпат. Оцінено стан лісів населенням гірських регіонів Івано-Франківської та Львівської обл. Встановлено основні причини здійснення правопорушень у лісах Карпат: високий рівень безробіття та бідність населення, недостатнє фінансування лісогосподарських підприємств і бажання мешканців отримати додатковий дохід. Наведено види незаконних рубань, які найбільш поширені у лісових насадженнях Карпат. Визначено найвагоміші заходи із запобігання та зменшення обсягів незаконних рубань і правопорушень у лісових екосистемах Українських Карпат.
ОЦІНЮВАННЯ ДЕКОРАТИВНОСТІ МОХОПОДІБНИХ НА ПРИКЛАДІ ПРЕДСТАВНИКІВ БРІОФЛОРИ МІСТА КИЄВА
Authors: Maievskyi K.V.
Published: July 2018

Розглянуто питання оцінювання декоративності мохоподібних для потреб садово-паркового мистецтва. Проаналізовано наявні методи оцінювання декоративності рослин. На основі методу Котєлової-Виноградової розроблено оригінальну методику комплексного декоративного оцінювання бріофітів. Виділено складові елементи загального оцінювання декоративності кожного бріофіта (декоративність форми росту, забарвлення вегетативної частини, текстура поверхні вегетативної частини, декоративність вегетативної частини у сухому стані, декоративність генеративних органів) та встановлено відповідні коефіцієнти їх значущості. Внаслідок комплексного декоративного оцінювання бріофлори Києва, за розробленою методикою, встановлено, що зі 128 виявлених видів мохоподібних – представники 60 є досить декоративними видами, 52 – задовільно декоративними, 14 – високодекоративними, 2 – низькодекоративними. Розроблену методику комплексного декоративного оцінювання можна застосовувати для оцінювання декоративності інших представників мохоподібних.
ДЕЯКІ АСПЕКТИ ВЕДЕННЯ СІЛЬСЬКОГО ГОСПОДАРСТВА НА РАДІОАКТИВНО ЗАБРУДНЕНИХ ЗЕМЛЯХ КИЇВСЬКОГО ПОЛІССЯ
Authors: Raychuk L.А.
Published: July 2018

На основі оброблених матеріалів проаналізовано стан сільськогосподарського виробництва на території Київського Полісся за існуючих соціально-економічних та екологічних умов. Окреслено низку пріоритетних шляхів реабілітації та розвитку аграрного сектору регіону. Доведено потребу переходу на агроландшафтну концепцію природокористування. Удосконалено принципи ведення сільськогосподарського виробництва на радіоактивно забруднених територіях у сучасних радіоекологічних та економічних умовах. Обґрунтовано спеціалізацію виробництва радіологічно безпечної сільськогосподарської продукції залежно від рівня радіоактивного забруднення території.