Preparation

This article deals with the development of a new composition of a polymer composition for dressing cotton yarn. The optimal concentration of the dressing polymer composition, which is 50 g/kg, against the starch-based dressing is 70 g/kg, i.e. the consumption of starch is reduced by 25-30%. It is experimentally established that the concentration of the dressing, which has a significant impact on the cost of the dressing, varies within 45-50 g/kg of the composition, while the true glue remained at the same level.
Theoretically, the interaction between the polymer groups and the reactive groups PVA and HIPAN is justified. The products resulting from this interaction contain, in particular, amide -CONH, carbamide - NHCONH, carbamate - ОСОNH2, ester - ОСО and other groups. Their presence in the macromolecules of the polymer composition makes it possible to improve the elastic, structural and mechanical properties, and to reduce the electronegativity of the adhesive film formed on the yarn during sizing.
The optimal technological parameters of preparation of dressings based on the polymer dressing material for composition. At the same time, it was found that the use of these preparations makes it possible to give the coated cotton yarn good quality and technological properties, to produce fabric on high-performance weaving equipment with a reduction in breakage by 35-40%, and an increase in productivity by 5.0-10.0%.
It is revealed that in the case of dressing cotton yarn with the developed dressing compositions, a significant reduction in starch is achieved, which indicates the feasibility of using the developed composition in economic and environmental terms

PVA/PAA/PEG/PVP nanofibers with HPMC and aloe vera were fabricated by electrospinning method. HPMC was added to the hybrid polymer solution as the water retention agent and aloe vera which are known over centuries were also added to the system to promote the healing of wounded or infected skin. The fabricated nanofiber mats were characterized using SEM, DSC, and FT-IR. SEM Images exhibited that the electrospun nanofibers were homogenous and linear. The nanofiber diameters ranged between 80-480 nm.

Nanofluid, a simple product of nanotechnology has become a topic of attraction due to its extraordinary heat transfer performance in various areas including cooling, power generation, defense, nuclear, space,microelectronics and bio-medical appliances. However,preparation and stabilization of such fluids are indeed a matter of concern for better understanding. For the last decade numerous research and development works have been done in the synthesis and stability of such materials. In this contribution, a  brief review has been presented to provide an update about the preparation and stabilization methods of nanofluids.

Hydroxyapatite (HA) has been used clinically for many years. It has good biocompatibility in bone contact as its chemical composition is similar to that of bone material. Porous HA ceramics have found enormous use in biomedical applications including bone tissue regeneration, cell proliferation, and drug delivery. In bone tissue engineering it has been applied as filling material for bone defects and augmentation, artificial bone graft material, and prosthesis revision surgery. Its high surface area leads to excellent osteoconductivity and resorbability providing fast bone ingrowth. Porous HA can be produced by a number of methods including conversion of natural bones, ceramic foaming technique, polymeric sponge method, gel casting of foams, starch consolidation, microwave processing, slip casting, and electrophoretic deposition technique. Some of these methods have been combined to fabricate porous HA with improved properties. These combination methods have yielded some promising results. This paper discusses briefly fundamental aspects of porous HA for artificial bone applications as well as various techniques used to prepare porous HA. Some of our recent results on development of porous HA will be presented as well.

http://www.sciencedirect.com/science/article/pii/S1468699606002348

A series of poly(vinyl alcohol) (PVA)/poly(vinyl pyrrolidone) (PVP)/poly(ethylene glycol) (PEG) hybrid nanofibers were fabricated by an electrospinning method, in order to be used as a potential wound dressing material. The effect of Aloe vera was investigated in terms of solution properties such as viscosity, conductivity, pH and surface tension. The nanofibrous wound dressing materials were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) and differential scanning calorimetry (DSC). SEM results revealed that the fiber diameters ranged between 200-500 nm and they were linear, homogenous and free of beads. DSC thermograms indicated that the addition of Aloe vera affects the crystal structure and efficiently cross-links the hybrid polymer, forming an amorphous structure with a melting temperature (Tm) of 219oC at an Aloe vera concentration of 3%. FTIR results clearly resolved the hybrid polymer structure of nanofibers obtained.

A systematic review of the concept of preparation for schooling (PPE) is presented in this study. The dimensions proposed by the United Nations Children's Fund (UNICEF), schools, parents, and “prepared children” is focused on the latter and on the set of competencies required for childhood transitions into primary school. This paper focuses on performing an analysis of the evaluation strategies, i.e., instruments, as part of the preparation of school (PPE) in the field of mathematical thinking and physical education and in response to the problematization in evaluating this set of competences. The problem is however related to the way of evaluating preschool in Mexico. To achieve the objective of the study, observation and the Scale for Evaluating Scientific Articles in Social and Human Sciences instrument were used, which examines, criticizes, and synthesizes representative literature on a topic in an integrated way. It is done in such a way as to compare the findings and generate new perspectives. The articles were consulted in the metasearch engines of SCOPUS, ELSEIVIER, and SCIELO within the period from 2017 to 2021 by filtering 20 articles for rigorous review. In conclusion, the instruments and evaluative forms cannot only be performed by psychometry, but it also contributes to the preschool assessment for a harmonic transition.

Petrochemistry needs stable, environmentally-friendly and efficient materials for use in the transformation, purification, and analysis of oil products. Ionic liquids (ILs) meet these requirements. A novel group of ILs with a very specific anion-dimethyl phosphate (DMP) ion-has appeared recently and can be designated as ILs-DMP. The DMP anion increases hydrophilicity and allocates the complex-formation capacity to ILs-DMP. Although these new materials have been widely used in cellulose dissolution processes, they have not been explored sufficiently in petrochemistry. There is a reason to believe that, in comparison with other ILs, the DMP anion can also provide additional benefits in oil chemistry. Unfortunately, no collected information is available about ILs-DMP in literature. The information presented in the review can pave the way to new applications of these unique materials.

Background: Sport management plays an important role in the athletes' achievement and championship. Sports Management helps us to learn how to overview the business side of sports organization with the use of the latest trends and technologies. Sport management is applied in various fields. The benefit of sport management is to increase the quality of business whether in sport industry, physical education, but it is also used in coaching athletes during the pre-competition, the competition process, and post competition. Purpose: The purpose of this research was to evaluate the principals of sport management like: (1) planning, (2) organizing, (3) staffing, (4) leading and (5) controlling in Asian Games 2018. Design/methodology/approach: This was a qualitative descriptive study. The research sample was made of all Indonesia sports professionals in 2018' games. To collect data, the researcher conducted an assessment of service quality from planning, organizing, staff, leading and control during the Asian championship using questionnaire, interview, and observation. The Results showed that the achievement of the Indonesian athletic team was more programmed and planned, which is evident from the early age athletes were selected and coached by senior athletes. Indonesia's role in the development process was more apparent in the government support, the support of stakeholders, and academics from universities. Conclusion: Sport management is a strong tool that helps physical education teachers, sport medicine managers, and coaching training managers to decide how to improve the peak of performance and to maintain a good quality of athletes and non-athletes.

AER 55 explores the goals of Australian education and of how schools should prepare young people for work and life. Section 1 provides an overview, discussing the nature of broad social and economic changes over the last 20 years, and their implications for the goals of Australian education systems today and for the future, and for what young people need to learn and why. Section 2 critically explores the assumptions which dominate current educational policies about the alignment of schooling with economic goals and work. Section 3 provides an analysis of the policy for social inclusion: the framing of educational goals that are oriented towards civic education, life skills and well-being. Developing curricula that equip young Australians for life involves confronting difficult questions about what kind of society Australia is now and should be in the future. Section 4 considers the nature of school knowledge and questions the learning outcomes traditionally measured. It argues that...

The number of descendants of a node in a binary search tree (BST) is the size of the subtree having this node as a root; the number of ascendants is the number of nodes on the path connecting this node with the root. Using a purely combinatorial approach (generating functions and dierential equations) we are able to extend previous results.

Characteristics models in demand analysis capture the idea that people value goods not For the commodity itself but for the characteristics (or attributes) or embodied in the good. For example, agents may care about the fat content and the taste of different sorts of milk but not the actual type of milk. When we have fewer characteristics than types of good the theory imposes restrictions on observables. We present a revealed preference characteristics model analysis of the demand for milk in Denmark.

Using a semiempirical rule based on a range of existing hard materials, Liu and Cohen predicted that some of the crystalline forms of C3N4 might have values of bulk modulus close to, or even greater than, that of diamond. Subsequent theoretical work has supported this result, although modifying which of the crystal structures had the most extreme properties. Based on the assumption that hardness is primarily determined by the bulk modulus, a large number of groups initiated research to try to make this ‘harder-than-diamond’ material. Although today there are doubts as to the validity of this assumption, the ability to synthesise materials with such a large bulk modulus is of great interest because such substances can be expected to have extreme properties, such as thermal conductivity, compression strength, acoustic velocity, etc. A review is presented of the methods used, and the results obtained, by a variety of groups in their attempts to prepare carbon nitride films. The preparation techniques have been somewhat arbitrarily divided into the following sections: (1) atmospheric-pressure chemical processes, including pyrolysis and explosive shock; (2) ion-beam deposition, including cathode arc; (3) laser techniques; (4) chemical vapour deposition processes, including direct-current (DC) arc, hot-filament chemical vapour deposition (HFCVD) and plasma-enhanced chemical vapour deposition (PECVD); and (5) reactive sputtering, with and without deliberate substrate biasing. We have also included a section describing some of the problems associated with the analysis of carbon nitride films. A brief description of the techniques is provided and we discuss some of the problems associated with the characterisation methods that have been used in the analysis of the deposited material. A somewhat speculative set of conclusions is presented which we hope will be of assistance to colleagues working in this field.

We consider the deterministic evolution of a time-discretized spiking network of neurons with connection weights having delays, modeled as a discretized neural network of the generalized integrate and fire (gIF) type. The purpose is to study a class of algorithmic methods allowing to calculate the proper parameters to reproduce exactly a given spike train generated by an hidden (unknown) neural network. This standard problem is known as NP-hard when delays are to be calculated. We propose here a reformulation, now expressed as a Linear-Programming (LP) problem, thus allowing to provide an efficient resolution. This allows us to "back-engineer" a neural network, i.e. to find out, given a set of initial conditions, which parameters (i.e., connection weights in this case), allow to simulate the network spike dynamics. More precisely we make explicit the fact that the back-engineering of a spike train, is a Linear (L) problem if the membrane potentials are observed and a LP problem if only spike times are observed, with a gIF model. Numerical robustness is discussed. We also explain how it is the use of a generalized IF neuron model instead of a leaky IF model that allows us to derive this algorithm. Furthermore, we point out how the L or LP adjustment mechanism is local to each unit and has the same structure as an "Hebbian" rule. A step further, this paradigm is easily generalizable to the design of input-output spike train transformations. This means that we have a practical method to "program" a spiking network, i.e. find a set of parameters allowing us to exactly reproduce the network output, given an input. Numerical verifications and illustrations are provided.

As the test objects served elks and dappled deer infested with helminthes. The purpose of this work is to study the efficacy of a new antiparasitic drug Ivirsalt used for prevention measures against helminths in wild hoofed animals. The therapeutic efficacy of new anthelmintic drug Ivirsalt used for treatment of nematodosis in wild hoofed animals was tested on 120 dappled deer, 7 elks and 1 roe deer in national Park «Losiny Ostrov». Ivirsalt are briquettes (licks) with a mass of 5 kg containing the active ingredient ivermectine and sodium chloride in the proportion 0,1 : 99,9. Salt lick briquettes were put in the feed-troughs on feeding places and saline soils based on the average daily salt consumption. The preparation was given with-in 14 days taking into account that the animals approach salt lick briquettes not less that 1 time a week. To determine the efficacy of preparation by the method of coproscopy the fecal samples are collected before and every 10 days after distribution ...

The aim of this research is a comparative study of how to attract and prepare students in teacher training institutions in Japan, Australia and Iran. The method of the research is comparative, and based on a range pattern that describes the four stages of description, interpretation, proximity, and comparison in comparative studies. The result showed that three countries of Japan, Australia and Iran, resembles each other in accepting students, such as secondary education and having a diploma, success in entrance exams. But Iran and Japan are more sensitive to teaching and doing interviews about attracting than Australia do. So that the powers of moral, social, physical, clearances, motivation are meticulously assessed. In addition to the items listed in the absorption, in Iran items like age, grade and commitment from the applicants are also important.

The Russian formalism is an approach was introduced at the beginning of 20th century and those who offered such a theory wanted to find a scientific method in literary criticism. They believed that the literary work itself should be criticized instead of its author and the literary nature of the work should be considered as the main subject.    Adopting such a method, they propelled the study of literary works to the issues of Form and Technique.  Besides formalistic reading of Mahmood Dowlatabadi’s “Journey”, in present paper, we are going to make Formalism and its related special concepts clear and to show how critics use these formalistic concepts to analyze this story.

In the IELTS writing preparation class, the teacher can facilitate the students by integrating the stylistic approach in building writing students’ style. Not only achieving the primary goals in English proficiency by focusing on the writing style, but students can also comfortably share their ideas in their style. The paper examined the stylistics integrated material in IELTS writing through noun phrase construction. This study employed a qualitative method and a descriptive design. The data were collected using structured observation sheets as the instrument and were analyzed stylistically. Writing materials and the writing results of 12 students at an English course were collected. Results showed that stylistics was used in phrase complexity and ambiguity as a part of writing strategies. It was supported by the three dominant types of noun phrases produced by the students in their writing: determiner + head, determiner + pre-modifier + head, and pre-modifier + head, as the eviden...

ABSTRACT The problem of designing space-time constellations for communication in spread multiple-antenna wireless systems over Rayleigh fading channel is addressed. Using the asymptotic union bound on error probability as design criterion, codes based on general complex-valued symbols are obtained with a gradient search optimization technique. New space-time constellations are constructed and their performance is assessed. Simulation results show that the proposed technique achieves significant performance gains over existing schemes. Since the designed codebooks do not seem to possess any structure that could reduce the memory requirements for storing the corresponding codebook, the problem of designing structured space-time constellations is also addressed. To overcome this problem, a discrete Fourier transform-based approach is adopted to design structured codebooks and their performance is evaluated. The new structured codebooks also demonstrate significant improvement over state-of-art structured schemes.