Физико-химические основы фиксации краски в процессе печати на флокированных поверхностях

В статті досліджуються фізико-хімічні явища при закріпленні офсетної фарби в процесі друкування на флокованих матеріалах.In the article the phenomena at fixing of offset ink in the process of printing on flocking materials physical and chemical are explored.В статье исследуются физико-химические явления при закреплении офсетной краски в процессе печатания на флокованых материалах

Using the debate method for teaching argumentation to 10-12 year-old children

The paper is devoted to peculiarities of using the debate method in teaching argumentation to 10–12 year-old children. The research is aimed at identifying the most effective ways and means of applying the given method. According to the author’s hypothesis, regular integration of discussions into the training course of rhetoric should promote learners’ argumentation, changing it from a mere fantasy through egocentric attitudes to the objective position expressed in a conclusive argumentative way. To achieve the research objectives, the experimental training method was developed applying the debate technique in the form of role plays adapted to peculiarities of children’s age. The experimental results indicated the decentration dynamics in the training process and, therefore, the effectiveness of the experimental training course. The presented training program can be used in teaching rhetoric to 10–12 year-olds, as well as in the optional argumentation course based on the debate technique. In addition, the analysis of children’s argumentation position in the context of socio-cognitive approach can give an impetus for further studies of children’s speech and thinking В статье рассматриваются особенности использования метода дебатов в обучении аргументации детей 10–12 лет. Целью исследования было выявление наиболее эффективных путей и средств применения названного метода. Согласно гипотезе автора, регулярное проведение дебатов в учебном курсе риторики должно способствовать изменению позиции в аргументации учащихся, т. е. переходу от простого фантазирования через эгоцентрические установки к объективной позиции, выражающейся в доказательном высказывании. Для реализации цели исследования была разработана экспериментальная обучающая методика, в рамках которой дебаты применялись как адаптированная к возрастным особенностям учащихся ролевая игра. Результаты эксперимента свидетельствовали о наличии динамики децентрации в процессе обучения и соответственно об эффективности экспериментального учебного курса. Представленная учебная программа может быть использована в обучении риторике детей 10–12 лет, а также для проведения факультативного курса обучения аргументации на основе дебатов. Кроме того, в контексте социокогнитивного подхода анализ позиции в аргументации детей может стать импульсом для дальнейших исследований речи и мышления ребенк

Kinematics of Tycho-2 Red Giant Clump Stars

Based on the Ogorodnikov-Milne model, we analyze the proper motions of 95 633 red giant clump (RGC) stars from the Tycho-2 Catalogue. The following Oort constants have been found: A = 15.9+-0.2 km/s/kpc and B = -12.0+-0.2 km/s/kpc. Using 3632 RGC stars with known proper motions, radial velocities, and photometric distances, we show that, apart from the star centroid velocity components relative to the Sun, only the model parameters that describe the stellar motions in the XY plane differ significantly from zero. We have studied the contraction (a negative K-effect) of the system of RGC stars as a function of their heliocentric distance and elevation above the Galactic plane. For a sample of distant (500--1000 pc) RGC stars located near the Galactic plane (|Z|<200 pc) with an average distance of d=0.7 kpc, the contraction velocity is shown to be Kd= -3.5+-0.9 km/s; a noticeable vertex deviation, lxy = 9.1+-0.5 degrees, is also observed for them. For stars located well above the Galactic plane (|Z|>=200 pc), these effects are less pronounced, Kd = -1.7+-0.5 km/s and lxy = 4.9+-0.6 degrees. Using RGC stars, we have found a rotation around the Galactic X axis directed toward the Galactic center with an angular velocity of -2.5+-0.3 km/s/kpc, which we associate with the warp of the Galactic stellar-gaseous disk.Comment: 23 pages, 7 figures, 4 table

Features of recording the time profile of single picosecond pulses in the real-time mode

A technique for measuring the time profile of a beam-current pulse of runaway electrons that are generated in atmospheric-pressure air is described. The analysis of changes in the pulse shape depending on the bandwidth of the registration path with a temporal resolution of up to 20 ps was performed. It was shown that the electron beam detected behind small-diameter diaphragms has a complicated structure, which depends on the parameters of the gas diode. The issues related to the interpretation of subnanosecond pulses that are picked off capacitive voltage sensors are discussed

Astrometric Control of the Inertiality of the Hipparcos Catalog

Based on the most complete list of the results of an individual comparison of the proper motions for stars of various programs common to the Hipparcos catalog, each of which is an independent realization of the inertial reference frame with regard to stellar proper motions, we redetermined the vector $\omega$ of residual rotation of the ICRS system relative to the extragalactic reference frame. The equatorial components of this vector were found to be the following: $\omega_x = +0.04\pm 0.15$ mas yr$^{-1}$, $\omega_y = +0.18\pm 0.12$ mas yr$^{-1}$, and $\omega_z = -0.35\pm 0.09$ mas yr$^{-1}$.Comment: 8 pages, 1 figur

A caricature of a singular curvature flow in the plane

We study a singular parabolic equation of the total variation type in one dimension. The problem is a simplification of the singular curvature flow. We show existence and uniqueness of weak solutions. We also prove existence of weak solutions to the semi-discretization of the problem as well as convergence of the approximating sequences. The semi-discretization shows that facets must form. For a class of initial data we are able to study in details the facet formation and interactions and their asymptotic behavior. We notice that our qualitative results may be interpreted with the help of a special composition of multivalued operators

The investigation of absolute proper motions of the XPM Catalogue

The XPM-1.0 is the regular version of the XPM catalogue. In comparison with XPM the astrometric catalogue of about 280 millions stars covering entire sky from -90 to +90 degrees in declination and in the magnitude range 10^m<B<22^m is something improved. The general procedure steps were followed as for XPM, but some of them are now performed on a more sophisticated level. The XPM-1.0 catalogue contains star positions, proper motions, 2MASS and USNO photometry of about 280 millions of the sources. We present some investigations of the absolute proper motions of XPM-1.0 catalogue and also the important information for the users of the catalogue. Unlike previous version, the XPM-1.0 contains the proper motions over the whole sky without gaps. In the fields, which cover the zone of avoidance or which contain less than of 25 galaxies a quasi absolute calibration was performed. The proper motion errors are varying from 3 to 10 mas/yr, depending on a specific field. The zero-point of the absolute proper motion frame (the absolute calibration) was specified with more than 1 million galaxies from 2MASS and USNO-A2.0. The mean formal error of absolute calibration is less than 1 mas/yr.Comment: 11 pages, 9 figures, accepte

Potencial do cambuí (Myrciaria tenella) para a elaboração de fermentado.

O presente trabalho objetivou testar o potencial do cambuí, coletado de Morro do Chapéu-BA, para a elaboração de fermentado, como alternativa de agregação de valor para pequenos produtores extrativistas

Desenvolvimento e aceitação de barra de cereal sabor umbu (Spondias tuberosa).

Produto bastante consumido nos dias atuais, a barra de cereal é uma alternativa saudável e prática. Este trabalho teve como objetivo formular barra de cereais contendo umbu, de preparo simples e baixo custo, e avaliar a aceitação do produto pelos consumidores, afim de propor a possível elaboração por pequenas agroindústrias. Foram desenvolvidas três formulações contendo ingredientes em diferentes proporções. A amostra 1 foi composta por xarope de polpa de umbu com sacarose, aveia prensada, coco ralado, castanha de caju, flocos de arroz, uva passa e doce de umbu em corte. A amostra 2 continha xarope de polpa de umbu com glicose, aveia prensada, coco ralado, castanha de caju, flocos de arroz e uva passa; e a amostra 3 foi composta por xarope caramelizado de polpa de umbu com sacarose, aveia prensada, coco ralado, castanha de caju, flocos de arroz e uva passa. Foi realizado teste de aceitação das barrinhas com 50 consumidores que avaliaram o quanto gostaram do produto utilizando escala hedônica de nove pontos (1=desgostei x extremamente; 9=gostei extremamente), além do grau de intenção de compra (1=certamente não compraria; 5=certamente compraria). Para aceitação da aparência, cor e textura as três formulações obtiveram notas sem diferença estatística (p < 0.05) entre si, e acima de 7, equivalente a ?gostei moderadamente? na escala. Para aroma, sabor e impressão global, as amostras 1 e 3 destacaram -se da amostra 2, sendo que a amostra 3 obteve as maiores médias de aceitação. Com relação ao sabor, a amostra 3 obteve média 8, equivalente a ?gostei muito? na escala. Segundo o teste de intenção de compra, 60% dos consumidores responderam que ?certamente comprariam? a amostra 3 caso estivesse a venda. Através desse trabalho pode-se concluir que as formulações testadas apresentaram bons resultados de aceitação, e que a formulação com xarope caramelizado foi a preferida pelos consumidores