bluuebunny/crossref_metadata_2025 huggingface dataset:
Mi participación cuenta: opiniones de estudiantes en formación inicial docente sobre el uso de one minute paper
Authors: Maldonado-Fuentes Ana Carolina
Published: February 2020

La Formación Inicial Docente es una etapa clave de la trayectoria formativa en que se construyen distintas representaciones sobre lo que es ser profesor y evaluador; presentándose la evaluación como contenido y competencia profesional. Sin embargo, aunque se alberga la expectativa de una evaluación orientada al aprendizaje, en Educación Superior prevalece la función sumativa y la hetero evaluación, con escasa participación de los sujetos evaluados (futuros profesores) durante el proceso evaluativo. En este marco, se realizó un estudio transversal de tipo descriptivo, con 41 estudiantes de Pedagogía Básica de una universidad del centro sur de Chile, con el propósito de identificar, a nivel de percepción, qué opinan del uso de One Minute Paper. Los resultados muestran una valoración positiva de la experiencia por parte de los sujetos bajo estudio, al favorecer el aprendizaje activo y la participación, y se alude al tiempo como principal factor obstaculizador.
De la ilusión al desencanto: sentidos y críticas en torno a la inclusión digital. Un estudio con docentes de escuelas secundarias emplazadas en contextos de pobreza urbana
Authors: Armella Julieta , Langer Eduardo
Published: February 2020

De la ilusión al desencanto nombra el pasaje del diseño de una serie de políticas educativas vinculadas con la inclusión digital a su puesta en acto (Ball, et al., 2012) en una cotidianeidad que es sostenida por quienes enfrentan la tarea de enseñar en condiciones altamente inestables y materialmente precarias. Aquí procuramos describir las formas en que los docentes piensan y tramitan los procesos de inclusión digital en instituciones emplazadas en contextos de extrema pobreza urbana, atendiendo a los sentidos, las tensiones y las negociaciones que tienen lugar en las escuelas. La hipótesis de trabajo que desarrollaremos es que en tanto promesas de soluciones mágicas las políticas de inclusión digital transitan un recorrido que va de la ilusión al desencanto y de allí deviene descontento cotidiano de los docentes en las escuelas.
Efectos del sorteo en una escuela secundaria pre universitaria
Authors: Anderete Schwal Mariano
Published: February 2020

En el presente trabajo se analizan las consecuencias de la reciente incorporación del sorteo parcial al sistema de ingreso de una escuela secundaria pública pre universitaria de Bahía Blanca, la cual sostenía históricamente el examen de ingreso. En tal sentido se determinará la eventual eficacia del sorteo como práctica democratizadora y socialmente heterogeneizante respecto de la composición de su alumnado, tal como lo proponía el Consejo Superior Universitario de la UNS al aprobar su reforma. Se utiliza un método cuantitativo donde se compara el origen de los estudiantes antes de la incorporación del sorteo y la situación cinco años después, indagando de qué manera se refleja la segregación educativa en la escuela.
La interacción docente-investigador en las entrevistas de autoconfrontación
Authors: Castorina José Antonio , Scavino Carolina , Sadovsky Patricia , Pereyra Ana , Muñoz de Corrales Elisabeth , Del Campo Rafael
Published: February 2020

Este trabajo se inscribe en la perspectiva de Didáctica Profesional (DP). Expone el análisis realizado en torno a la implementación de una estrategia metodológica: la entrevista de autoconfrontación simple, que propone la DP para promover la reflexión y conceptualización de la actividad docente. Presenta una revisión crítica sobre el uso de esta herramienta para la reflexión docente sobre la base de un estudio realizado con una maestra de matemática de 4to grado sobre la enseñanza de los “cuerpos geométricos”. Dicha revisión metodológica, comprende aspectos autocríticos del equipo, así como aspectos propositivos en torno a las condiciones en que este tipo de entrevistas debe desarrollarse si quiere promoverse algún tipo de reflexión docente.  La reflexividad emerge en un contexto de diálogo con los investigadores en el que es necesario que ambos estén implicados en la conversación, a partir de co-explicitar sus ideas y construir un problema común para dicho intercambio. Se pone en evidencia la imbricación que existe entre las decisiones pedagógicas, didácticas y las relativas al trabajo profesional.
Muraling the invisible strings: Collective memory work from an educator inquiry group
Authors: Clark Margaret
Published: February 2020

In this qualitative study of a year-long educator inquiry workshop, nine early childhood educators engaged in the process of collective memory work to critically reflect on how their past experiences as young learners relates to their current teaching practices. Through an iterative analysis of the participants’ discussions and writings, this paper highlights how a group of educators shifted their way of thinking about teaching from a series of damage-based memories of restrictive learning environments towards a focus on desire-based stories of transformational and expansive learning experiences. For this group of teachers, this shift became an essential component to identifying how they could begin to work to create liberatory learning experiences and spaces for all students.
Parents’ role in adolescents’ leisure time use: From goals to parenting practices
Authors: Van der Eecken Annelore , Spruyt Bram , Bradt Lieve
Published: February 2020

Inspired by Ann Swidler’s toolkit theory, this qualitative study aims to achieve a better understanding of social class differences in parenting practices and, in turn, in young people’s leisure time use. To that end, 32 semi-structured face-to-face interviews with parents from middle- and working-class families were conducted in a small city in Belgium. An inductive thematic analysis revealed substantial social class differences with respect to three parenting practices: (1) setting an example, (2) resolving conflicts and (3) facilitating leisure activities. The interviews showed that these differences were mainly linked to social class differences in parents’ resources: working-class parents more often lacked flexible time, financial resources, an extensive social network on which they could rely and the institutionally required attitudes, skills and experience to engage in the above-mentioned parenting practices. We conclude that young people’s (continued) institutional leisure participation puts high requirements on parents and not all (working-class) parents are able to live up to such requirements. In that way, contemporary leisure settings reproduce rather than mitigate inequality in the use of leisure time.
Colombian retrospective study of the association between breastfeeding duration and eating behaviors
Authors: Rincón Carlos , Escalante Barrios Elsa Lucia , Suarez Enciso Sonia , Estrada Jesús , Anturi Linero Marilyn , Herdénez Alejandra
Published: February 2020

The current retrospective cross-sectional study included 175 Colombian caregivers of children ranging between 24 and 59 months old (M=47.08, SD=7.08) enrolled in childcare centers located in the Caribbean region. 58% of the children are male, and all of them belong to low-income families. Breastfeeding duration ranged between children’s 0 to 37 months old (M=10.84, SD=8.48); 64 of them had exclusive breastfeeding for during their first 6 months (i.e., no fed with bottle). Results showed that the variance of Food Responsiveness explained by the model was 2% (R2=.02, F(3,161)=1.081, p=.359). Breastfeeding duration did not significantly predict Food Responsiveness (β=-.004, p=.219), as well as age (β=.004, p=.346) and gender (β=.056, p=.354) did not significantly explain the dependent variable. Likewise, Satiety Responsiveness variance was not explained by duration of breastfeeding (β=.002, p=.548), age (β=.003, p=.489), and gender (β=.040, p=.561). Overall, the explained variance was less than 1% (R2=.008, F(3,161)= .428, p=.733). Breastfeeding duration does not significantly change the child’s likelihood of being unhealthy (β=-.010, p=.616), while being male and getting older increase the odds of being healthy. Future directions and limitations are discussed.
PENERAPAN KONSEP BATAL DEMI HUKUM DI PERADILAN PIDANA, PERDATA DAN TATA USAHA NEGARA
Authors: Santosa Fajar
Published: February 2020

Konsep batal demi hukum dapat ditinjau dari aspek teoritis maupun dalam praktek penerapan di lapangan diantaranya dalam peradilan pidana, perdata, dan tata usaha negara.  Dalam pemahaman umum konsep batal demi hukum sering disalah pahami penerapannya. Secara tinjauan teoritis, kebatalan suatu produk hukum dapat terjadi karena kondisi batal demi hukum dan dapat dibatalkan. Keduanya memiliki konsep yang berbeda. Kondisi “dapat dibatalkan” terjadi terjadi dengan syarat kebatalannya dilakukan dengan perbuatan hukum tertentu dan diajukan kepada institusi tertentu yang oleh hukum memang diberikan kewenangan melakukan pembatalan suatu produk hukum. Sedangkan kondisi “batal demi hukum” dipahami seolah-olah tidak memerlukan perbuatan hukum tertentu oleh institusi tertentu karena kebatalannya terjadi secara sendiri karena hukum. Padahal sesungguhnya dalam konteks keadaan batal demi hukum suatu putusan badan peradilan, maka keadaan batal demi hukum adalah suatu keadaan yang sesungguhnya masih membutuhkan suatu perbuatan hukum berupa pengajuan pembatalan  kepada suatu badan peradilan. Kata kunci: peradilan, putusan, batal demi hukum
TELAAH FILSAFAT HUKUM DALAM MEMANDANG TINDAK PIDANA KORUPSI DI INDONESIA
Authors: Rozikin Mochammad
Published: February 2020

Korupsi sudah menjadi bahan perbincangan dan bukan hal baru lagi di Indonesia. Sejumlah analisis tentang korupsi dan beberapa upaya untuk pemberantasanya telah dilakukan bahkan oleh para akademisi melalui buah pikiran mereka. Umumnya hasil analisis tersebut menunjukkan bahwa adanya pengesampingan penegakan hukum atas upaya pemberantasan korupsi. Gagasan semacam ini memberikan tantangan serius terhadap bidang keilmuan hukum, sehingga disinilah peranan filsafat hukum dalam mendampingi melakukan sebuah analisis untuk mencapai sebuah cara berfikir yang bijaksana untuk menghadapi ujian pemberantasan tindak pidana korupsi di Indonesia.

 

Kata Kunci: Filsafat, Hukum, Korupsi, Indonesia
The Improvement of Weighted Least Square State Estimation Accuracy
Using Optimal PMU Placement
Authors: Al-Maitah Khaled , Al-Khriesar Batool , Al-Odienat Abdullah
Published: February 2020

This paper proposed a new technique to improve the state estimation performance by optimal placement of phasor measurement units (OPP), the proposed technique is based on Simulating Annealing (SA) algorithm for OPP by comparing between the SA solution sets and choosing the optimal location of PMUs to enhance the state estimation performance. The proposed technique has been tested through IEEE 24 bus test system using power system analysis toolbox in MATLAB program. In this paper the root mean squared deviation (RMSD) has been used to determine the state estimation performance, the simulation result demonstrates that the proposed method proved its effectiveness to be one of the best methods used to improve the state estimation performance
Management of Eco-Economic Efficiency of Using Land Resources of Ukrainian Farms
Authors: Groshev S. V.
Published: February 2020

Development of farms in Ukraine is strategically important for food security ensuring, creating jobs in villages, preserving and developing rural areas. Consequently, rational use of the land, being the main production means in agriculture, serves the basis for the farms’ competitiveness , and the management of eco-economic efficiency of using land resources of Ukrainian farms, at the same time, should become the main tool. The research bases upon general and special methods, application of which allows improving control system of eco-economic efficiency of using land resources of farms. The dynamics of reproduction of farms’ land resources potential is analysed by using the balance method. It is ascertained that through the 2012-2016 soils sustained a loss of 5.95 t/ha of humus, 9.3 centner/ha of nitrogen, phosphorus and potassium, 10.6 centner/ha of calcium, which led to the general economic losses over UAH 71.8 thousand per hectare. It is shown that a complex biologization of agriculture, reorientation of farms to the production of organic agricultural products generally facilitate preservation and increasing soils fertility, and also land clearance operations. Besides, organic agricultural production in times exceeds traditional one according to the indicators of economic efficiency , which regarding the increasing market capacity background makes it niche for farms. In order to stimulate farmers to eco-effective land resources using, the system of administrative responsibility of land users for irrational arable land usage was substantiated, which led to the deterioration in its qualitative state. Besides, this system is agreed with the effective legal support of the land and rent relations, agrochemical certification of lands and the farms’ taxation. For the institutionalization of a system of rational land use and maintaining the fertility of farms soils, it is offered to create in Ukraine the Public Foundation for Soil Protection, which would perform the main functions of cash flows administration and control of their targeted use
Necessity and Ways of Growth of Investment Appeal for Rural Areas on the Basis of Inclusion
Authors: Tymoshenko M. M.
Published: February 2020

The priority direction of solving complex socio-economic problems in the countryside (demographic crisis, high unemployment rate, migratory outflow of population, imperfect social infrastructure, low motivation of labor, etc.) is to increase investment appeal and draw significant investment resources on the basis of inclusion. According to this, the topic is timely accurate and relevant. The purpose of the article is to analyze the current state and trends of investment activity in rural areas, to develop and substantiate strategic directions of growth of investment appeal of rural economy on the basis of inclusion. The methodological basis of the study comprises dialectical and systematic research approaches of the fundamental provisions of economic science in relation to the socio-economic development of rural areas. With the help of the economic-statistical method (such methods as - statistical observation, comparison, tabular, graphical) the present state of investment activity in rural areas is investigated. Strategic guidelines for sustainable rural development in the context of inclusiveness are substantiated according to the analysis and synthesis methods. Abstract-logical method, in particular methods of induction and deduction, analogy and comparison, operationalization of concepts used to systematize research results, theoretical generalization and formulation of conclusions and proposals. The article reveals peculiarities, significance and functions of investment activity in rural areas. An estimation of the current state and trends of investment activity development under the conditions of the rural economic space is done. Overview of scientific and theoretical bases for the interpretation of the concept of "inclusive development" was conducted. The strategic directions of sustainable development of our state in the context of inclusion are outlined on the basis of the developed draft Strategy for Sustainable Development of Ukraine for the period up to 2030. The priority directions of socio-ecological and economic development of the village and ways of increasing the investment appeal of rural areas of Ukraine under the inclusion conditions are determined
Interaction of Agribusiness Enterprises and Public Governments as a Way of Activating Foreign Trade Activities
Authors: Tsiolkovska S. I.
Published: February 2020

The cooperation of state authorities and agribusiness enterprises is relevant in the formation of a favorable business environment, a system of contractual relations between counterparties, and the development of foreign economic relations. In the article presented the scheme of interaction of state authorities and enterprises of agribusiness with the formation of the policy of foreign economic activity. From the system of contractual relations between the subjects of entrepreneurial activity, the following forms of contractual relations are proposed, such as an agricultural trading house, a self-regulatory organization, a cooperative that will serve as a long-term link between the links in the foreign economic activity of agribusiness enterprises. The work is elaborated in the strategic plans of the state, where special attention is focused on small subjects of agribusiness with the added value of the product, which is important for the implementation of foreign economic activities, and the development of rural areas in the complex
Influence of Plants Protection Means on the Productivity of Naked Oats Under the Conditions of the Western Forest-Steppe of Ukraine
Authors: Mazurak I.V.
Published: February 2020

The article presents the results of field research on the production of naked oats yields, depending on the means of plant protection under the conditions of the western forest-steppe of Ukraine. The object of research was the belligerent variety Avgol. The purpose of our research was to study the effects of various protection schemes to obtain the highest yield of oats. In the process of conducting research, the field method of research was used: - to determine the influence of the elements of cultivation technology. From the results of the research, it can be seen that the means of plant protection have an effect on the yield of naked oats. The smallest it was in the first variant with the introduction of the Granstar herbicide (25 g / ha) and was 4.87 t / ha. Intensification of cultivation technology with morphorigulator Stabilan (0.8 l / ha) yields of oats increased to 5.35 t / ha, which is 0.45 t / ha more than the previous one. The morphoregulator thickened the walls of the straw, reduced the height of the plants, and thus protected from falling. In the third variant (Granstar (25g / ha) + Stabilan (0.8l / ha) + Falcon fungicide (0.8 l / ha), the yield increase was 4.98 t / ha, and the growth to the first was 0.96 t / ha Fungicide Falcon protected crops of oats from the defeat of septoriosis, powdery mildew, spots in the phase of tubing. It provided an increase in yields by 0.51 t / ha. Two-time introduction of fungicides (Granstar (25 g / ha) + Stabilan (0.8 l / ha) + Falcon (0.8 l / ha) + Rex Duo fungicide (0.6 l / ha)) positively affected oat crops and contributed to an increase yields to 6.09 t / ha, which is 1.22 t / ha of the control variant. The highest yields over the years have been observed in the fifth variant (Granstar (25 g / ha) + Stabilan (0.8 l / ha) + Falcon (0.8 l / ha) + Rex Duo (0.6 l / ha) + insecticide Fastak (0.2 l / ha)), where it was 6.15 t / ha, which is 1.28 t / ha more than the variant with the application of only Granstar herbicide (25 g / ha). However, the use of insecticides was ineffective in comparison with fungicides. The increase in the yield from the insecticide Fastak was only 0.06 t / ha. Depending on the protection schemes, the protein content did not change significantly and was at 14.42 - 14.44%. Consequently, the yield of naked oat of the variety Avogol due to the introduction of herbicide, morpho-regulator, fungicides and insecticide increased by 1.28 t / ha
Features of Manufacturing Spiral Corrugated Blanks From Various Profiles of Corrugations
Authors: Dragan А.P. , Flionts О.V. , Klendiy М.І. , Kotyk R.М. , Semeniv І.І.
Published: February 2020

The leading role in the field of using spiral mechanisms plays the design and manufacture of corrugated spiral working bodies, which are widely used in mixers, heat exchangers, machines for borontation of free abrasives, in the confectionery and pharmaceutical industries, etc. Increasing the requirements to the design and technological parameters, quality, reliability and durability, enhanced technological capabilities require deep analysis of existing structures and technologies of their production and the development of scientific research on theoretical and experimental studies and their successful implementation in production. The paper focuses on the development and implementation of new advanced technological processes of spiral corrugated and ring blanks. The results of theoretical and experimental research were based on the development and analysis of technological schemes for the formation of screw corrugated blanks in order to improve the mixing of bulk materials. The functional and structural and technological features of spiral corrugated blanks manufacture and the designing of the appropriate technological equipment and facilities with the withdrawal of the analytical dependences for determination of treatment regimes. The analytical dependences for determination of power and structural parameters of technological process of bending blanks between two cylindrical gear cross-sectional toothed wheels. Characteristics curves of spiral corrugated blanks on the basis of width and thickness of the lines and the workpiece step of 1 ... 3 mm thickness and with 15 ... 25….30 mm width are given in the paper. The results of the experiment show that labor productivity will increase by 20-30% in manufacturing, 2-3 times in control operations
Investigation of Transients in Systems of Subordinate Regulation of Speed of an Engine of a Direct Current With Sensors of Intensity
Authors: Myhailova L. M. , Kamyshlov V. H. , Dubik V. M. , Horbovyi O. V.
Published: February 2020

The study presents the method of calculation of transients in the technically optimal [2] at speed (e.m.f.) systems with intensity detectors for controlling actions in the direct current drives A comprehensive analysis of the dynamical systems is given by differential equations, the order of which corresponds to the order of differential equations, which describe the corresponding systems. Moreover, the authors proceed from the assumption that the analytical calculations of automatic control systems allow readers to get more complete information on the transients in these systems. The analytical dependencies for all the DC drives considered in the work are provided.In the study of high order systems, a simplified differential equation may allow errors in the calculation of such parameters of the system as the magnitude of the maximum and the rate of increase of anchor current, when selecting the installed power of the converters and, in particular, their voltages. In more in-depth studies related to the formation of current diagrams of the anchor current, as well as in the calculation of the equalization current in dependent control systems. Also, errors can reach large values, since in these cases derivatives of high orders from the main function are used
The Impact Of Higher Nervous Activity Type On Work Productivity And Horse Growth
Authors: Slyusarenko Yu. L.
Published: February 2020

Estimation of working productivity of horses of sport breeds at an early age is of great selective and economic importance. The purpose of our research was to study the effect of the type of higher nervous activity on the formation of the level of working productivity of horses, basic measurements and live weight. Methodology and source material. The research was carried out on the stock of horses of Ukrainian riding breeding plant PJSC "Rize-Maximko" (N = 77). The assessment of growth and development was carried out according to the following parameters: height in the neck, breast circumference, trunk length, trunk circumference and live weight. Analysis of working productivity of horses was based on the results of factory tests in the farm. In order to achieve this goal, conventional zootechnical methods were used. The origin of horses was determined on the basis of pedigree cards. The determination of the type of higher nervous activity was carried out according to the simplified methodology of the All-Russia Research Institute of Horse Breeding [4]. All data is statistically processed by the methods of variation statistics. Results and discussion. For the analysis of exteriors, 77 horses of Ukrainian horse breed were selected, which was divided into 4 groups by the type of higher nervous activity. According to the results of the study of growth and development of horses. Adult livestock of horses with a weak type of higher nervous activity in height at the withers, oblique body length and chest circumference are likely to exceed the standard breed, respectively, at 2, 5 and 4 cm (P0,01). The lowest indicators of height at the withers were observed in adult horses of 3 other groups (164 cm)
SOME RESULTS RELATED WITH FUZZY a −NORMED LINEAR SPACE
Authors: Arunmaran M. , Kannan K.
Published: February 2020

Zadeh established the concept of fuzzy set based on the characteristic function. Foundation of fuzzy set theory was introduced by him. Throughout this paper, 𝑀𝑛(𝐹) denotes the set of all fuzzy matrices of order 𝑛 over the fuzzy unit interval [0,1]. Inaddi tion (𝑀𝑛 (𝐹), 𝜃) dis called as fuzzy 𝛼 −normed linear space. The objective of this paper is to investigate the relationships between convergent sequences and fuzzy 𝛼 −normed linear space. The set of all fuzzy points in 𝑀𝑛 (𝐹) is denoted by 𝑃∗(𝑀𝑛(𝐹)). For a fuzzy 𝛼 −normed linear space (𝑀𝑛 (𝐹), 𝜃), we have |𝜃(𝑃𝐴)𝛼 −𝜃(𝑃𝐵)𝛼 | ≤ 𝜃(𝑃𝐴,𝑃𝐵)𝛼. Besides 𝜃 is a continuous function on 𝑀𝑛 (𝐹). That is, if 𝑃𝐴𝑛 → 𝑃𝐴 as 𝑛 → ∞ then 𝜃(𝑃𝐴𝑛 )𝛼 → 𝜃(𝑃𝐴)𝛼 as 𝑛 → ∞, where 𝑃𝐴𝑛 is a sequence in (𝑀𝑛 (𝐹), 𝜃). Hence, 𝜃 is always bounded on 𝑀𝑛(𝐹). Next we introduce the following result: Let 𝑃𝐴𝑛 , 𝑃𝐵𝑛 ∈ 𝑃 ∗ (𝑀𝑛(𝐹)) with 𝑃𝐴𝑛 and 𝑃𝐵𝑛 converge to 𝑃𝐴 and 𝑃𝐵 respectively as 𝑛 → ∞. Then 𝑃𝐴𝑛 + 𝑃𝐵𝑛 converge to 𝑃𝐴 + 𝑃𝐵 as 𝑛 → ∞. Furthermore, we are able to compare two different fuzzy 𝛼 −norms with convergent sequence. The result states that for a fuzzy 𝛼 −normed linear space (𝑀𝑛(𝐹), 𝜃), we have 𝜃(𝑃𝐴)𝛼1 ≥ 𝑀𝜃(𝑃𝐴 )𝛼2 , for some 𝑀 > 0 and 𝑃𝐴 ∈ 𝑃 ∗ (𝑀𝑛(𝐹)). If 𝑃𝐴𝑛 converges to 𝑃𝐴 under fuzzy 𝛼1 −norm then 𝑃𝐴𝑛 converges to 𝑃𝐴 under fuzzy 𝛼2 −norm. Moreover, if (𝑀𝑛 (𝐹), 𝜃) has finite dimension then it should be complete. Through these results, we are able to get clear understanding about the concept fuzzy 𝛼 −normed linear space and its properties.
La madera como recurso en grupos cazadores-recolectores patagónicos: métodos de análisis del material leñoso.
Authors: Caruso Fermé Laura
Published: February 2020

La gestión del material leñoso por parte de las sociedades cazadoras-recolectoras patagónicas estuvo condicionada y determinada por la movilidad, la duración y la función de las distintas ocupaciones. El estudio arqueobotánico de restos vegetales leñosos permite comprender el papel que jugaron estos recursos dentro de una sociedad brindando una mejor aproximación a la dinámica socioeconómica de un grupo. Para comprender los modos de obtención y usos de los recursos leñosos en grupos cazadores-recolectores es necesaria la aplicación de diferentes técnicas de análisis. El propósito del presente trabajo es dar a conocer, dentro del dossier Estudios arqueobotánicos en Argentina. Situación actual y nuevas perspectivas, las distintas metodologías utilizadas en 18 estudios arqueobotánicos. Los resultados obtenidos hasta el momento permiten plantear diferencias y algunas similitudes en cuanto a la gestión de los recursos leñosos por parte de los antiguos pobladores de la Patagonia. La integración de las distintas metodologías y técnicas de estudio del material leñoso, utilizado como combustible y/o materia prima, representa un avance dentro de la arqueobotánica patagónica.
Las plantas de los cazadores-recolectores de la Pampa Occidental Argentina. Base de datos de recursos vegetales potencialmente utilizados
Authors: Musaubach M. Gabriela , Plos Anabela
Published: February 2020

En el centro-sur de la provincia de La Pampa (Argentina) se están realizando estudios arqueobotánicos, en el marco de un proyecto de investigación orientado a contribuir al conocimiento de las actividades de procesamiento, consumo y descarte vegetal, llevadas a cabo por las sociedades cazadoras-recolectoras de la Pampa Occidental argentina. El primer paso en la investigación arqueobotánica consiste en la confección de una colección de referencia de plantas de la zona en estudio. A fin de complementar dicha colección de referencia se confeccionó una base de datos de recursos vegetales potencialmente utilizados en el área de estudio. Esta base se confeccionó mediante un relevamiento bibliográfico de fuentes editas con referencias etnobotánicas, etnográficas y etnohistóricas sobre el uso de plantas en la región Pampeana y territorios aledaños. Dicha base de datos incluye el nombre común de las plantas, el nombre científico actualizado, la parte anatómica utilizada y los usos etnobotánicos conocidos. Se registraron principalmente aquellos usos y procesamientos relacionados a cuestiones alimenticias, tecnofacturas y medicinales.
Estudio comparativo de abrigos rocosos en la costa norte de Santa Cruz (Patagonia).
Authors: Zubimendi Miguel Ángel , Ambrústolo Pablo
Published: February 2020

En este trabajo se presenta un estudio comparativo de los abrigos rocosos identificados en la Costa Norte de Santa Cruz (Patagonia Argentina) a partir de un programa sistemático de relevamiento de este tipo de sitios, tanto en la costa como en la franja intermedia. Mediante una ficha descriptiva se registraron variables contextuales, naturales y arqueológicas para poder analizar y comparar distintos aspectos de interés. De esta forma se relevaron 38 abrigos rocosos, de los cuales 26 brindaron evidencias arqueológicas, entre ellos cinco con manifestaciones rupestres. Los abrigos rocosos se ubican en un sector acotado del área de estudio, comprendido entre la cuenca del río y la ría Deseado y la costa ubicada al sur, asociados a la presencia de afloramientos ignimbríticos. Las evidencias obtenidas hasta el momento reflejan bajas densidades arqueológicas en la mayoría de los sitios. En este sentido, en general se identificaron escasos restos faunísticos y sucesiones de fogones pequeños y discretos, lo que sugiere que los eventos de ocupación de los mismos habrían sido relativamente poco intensivos.
Paisaje y experiencia en Oyola a finales del primer milenio D.C. (Dpto. El Alto, Catamarca).
Authors: Quesada Marcos , Zuccarelli Verónica , Ghecco Lucas , Gastaldi Marcos , Boscatto Sofía , Moreno Enrique
Published: February 2020

A lo largo de varias décadas de investigaciones arqueológicas, la sierra de El Alto-Ancasti, en el extremo oriental de la provincia de Catamarca (Argentina), fue reconocida por albergar gran cantidad de abrigos pétreos con pinturas y grabados prehispánicos. Sin descuidar la importancia de estas cuevas y aleros, en este trabajo nos concentramos en caracterizar y contrastar dos paisajes diferentes y complementarios: uno asociado a los abrigos con arte rupestre, nucleados en el sector conocido como Cerro de Oyola, y otro aldeano y agrícola, dispuesto en las áreas más bajas adyacentes. En este marco, se describen los diferentes aspectos del registro arqueológico que conforman cada uno de estos espacios, como estructuras de vivienda, terrazas agrícolas, artefactos de molienda y ciertos contrastes en los conjuntos de arte rupestre detectados en cada lugar. Para finalizar se plantean algunas diferencias en los modos materiales de construir estos paisajes. que podrían corresponder a formas diversas, articuladas e interdependientes de habitarlos.
BANCADA DE ENSAIOS AERODINÂMICOS PARA AERONAVES RÁDIO CONTROLADAS
Authors: Cavalcanti Vinícius Queiroz , Lugones Santiago Martin
Published: February 2020

O presente trabalho relata a concepção, detalhamento e realização de um protótipo de bancada para ensaios de sustentação e arrasto de asas de aeronaves rádio controladas de baixo custo para fins de aquisição de dados e validação de cálculos e estruturação de relatórios da equipe Megazord AeroDesign, representante da Faculdade de Tecnologia Professor Jessen Vidal de São Jose dos Campos. Mediante o uso de Arduino e redundância de componentes eletrônicos de custos relativamente baixos, pretende-se elaborar um protótipo de balança que consiga medir a sustentação e arrasto de um aeromodelo rádio controlado.
Copper-catalyzed enantioselective conjugate addition of organometallic reagents to challenging Michael acceptors
Authors: Pichon Delphine , Morvan Jennifer , Crévisy Christophe , Mauduit Marc
Published: February 2020

The copper-catalyzed enantioselective conjugate addition (ECA) of organometallic nucleophiles to electron-deficient alkenes (Michael acceptors) represents an efficient and attractive methodology for providing a wide range of relevant chiral molecules. In order to increase the attractiveness of this useful catalytic transformation, some Michael acceptors bearing challenging electron-deficient functions (i.e., aldehydes, thioesters, acylimidazoles, N-acyloxazolidinones, N-acylpyrrolidinones, amides, N-acylpyrroles) were recently investigated. Remarkably, only a few chiral copper-based catalytic systems have successfully achieved the conjugate addition of different organometallic reagents to these challenging Michael acceptors, with excellent regio- and enantioselectivity. Furthermore, thanks to their easy derivatization, the resulting chiral conjugated products could be converted into various natural products. The aim of this tutorial review is to summarize recent advances accomplished in this stimulating field.
Pengaruh Konsentrasi Nutrisi AB Mix terhadap Pertumbuhan dan Hasil Sawi Pakcoy (Brassica rapa L.) dengan Hidroponik Sistem Sumbu (Wick System)
Authors: Suarsana Made , Parmila I Putu , Gunawan Kadek Agus
Published: February 2020

This study aims to determine the effect of the concentration of AB Mix nutrients on the growth and yield of pakcoy plants. This research has been carried out at the agronet house of the Faculty of Agriculture, Panji Sakti University at an altitude of 39 m above sea level (above sea level), in March-May 2019. The experimental design used a single randomized block design (RCBD), namely the concentration of the AB Mix nutrition treatment ( K). Statistical analysis showed that AB Mix nutrient concentration had a very significant effect (p <0.01) on plant height at 14 days after planting, 21 days after planting, 28 days after planting, total wet weight per plant, leaf area per plant, and economic fresh weight per plant. The nutrient concentration of AB Mix 1.2% provides the best growth and yield of pakcoy plants. The higher concentration of AB Mix nutrition given causes the total wet weight per plant to change quadratically Ŷ = -137.83x2 + 325.54x - 88.997 with the coefficient of determination (R2) = 1 so that the optimum concentration = 1.18% and wet weight is obtained maximum total planting = 103,226 grams.Keywords: hydroponics, AB Mix nutrition, pakcoy Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi nutrisi AB Mix terhadap pertumbuhan dan hasil tanaman pakcoy. Penelitian ini telah dilaksanakan di rumah agronet Fakultas Pertanian Universitas Panji Sakti pada ketinggian tempat 39 m dpl (dari atas permukaan laut), pada bulan Maret -Mei 2019. Rancangan percobaan menggunakan rancangan acak kelompok (RAK) faktor tunggal yaitu perlakuan konsentrasi nutrisi AB Mix (K). Hasil analisis staistik menunjukkan konsentrasi nutrisi AB Mix berpengaruh sangat nyata (p<0,01) terhadap tinggi tanaman pada umur 14 hst, 21 hst, 28 hst, 35 hst, berat basah total per tanaman, luas daun per tanaman, dan berat segar ekonomis per tanaman. Konsentrasi nutrisi AB Mix 1,2% memberikan pertumbuhan dan hasil tanaman pakcoy terbaik. Semakin tinggi konsentrasi nutrisi AB Mix yang diberikan menyebabkan berat basah total per tanaman berubah secara kuadratik yaitu Ŷ= -137,83x2 + 325,54x - 88,997 dengan koefisien determinasi (R2) = 1 sehingga diperoleh konsentrasi optimum = 1,18% dan berat basah total pertanaman maksimum =103,226 gram.Kata kunci: hidroponik, nutrisi AB Mix, pakcoy
14N/15N Isotopic Ratio in CH3CN of Titan’s Atmosphere Measured with ALMA
Authors: Iino Takahiro , Sagawa Hideo , Tsukagoshi Takashi
Published: February 2020

The nitriles present in the atmosphere of Titan can be expected to exhibit different

values depending on their production processes, primarily because of the various

dissociation processes induced by different sources such as ultraviolet radiation, magnetospheric electrons, and Galactic cosmic rays. For

, one photochemical model predicted a 14N/15N value of 120–130 in the lower stratosphere. This is much higher than that for HCN and

, ∼67–94. By analyzing archival data obtained by the Atacama Large Millimeter/submillimeter Array, we successfully detected submillimeter rotational transitions of

(J = 19–18) located in the 338 GHz band in Titan’s atmospheric spectra. By comparing those observations with the simultaneously observed

(J = 19–18) lines in the 349 GHz band, which probe from 160 to ∼400 km altitude, we then derived 14N/15N in

as 125

. Although the range of the derived value shows insufficient accuracy due to limitations on data quality, the best-fit value suggests that 14N/15N for

is higher than values that have previously been observed and theoretically predicted for HCN and

. This may be explained by the different

dissociation sources according to altitude, as suggested by a recent photochemical model.
Large-scale Mixing in a Violent Oxygen–Neon Shell Merger Prior to a Core-collapse Supernova
Authors: Yadav Naveen , Müller Bernhard , Janka Hans Thomas , Melson Tobias , Heger Alexander
Published: February 2020

We present a 7 minute long 4π-3D simulation of a shell merger event in a nonrotating 18.88

M

⊙

supernova progenitor before the onset of gravitational collapse. The key motivation is to capture the large-scale mixing and asymmetries in the wake of the shell merger before collapse using a self-consistent approach. The 4π geometry is crucial, as it allows us to follow the growth and evolution of convective modes on the largest possible scales. We find significant differences between the kinematic, thermodynamic, and chemical evolution of the 3D and 1D models. The 3D model shows vigorous convection leading to more efficient mixing of nuclear species. In the 3D case, the entire oxygen shell attains convective Mach numbers of ≈0.1, whereas in the 1D model, the convective velocities are much lower, and there is negligible overshooting across convective boundaries. In the 3D case, the convective eddies entrain nuclear species from the neon (and carbon) layers into the deeper part of the oxygen-burning shell, where they burn and power a violent convection phase with outflows. This is a prototypical model of a convective–reactive system. Due to the strong convection and resulting efficient mixing, the interface between the neon layer and the silicon-enriched oxygen layer disappears during the evolution, and silicon is mixed far out into the merged oxygen/neon shell. Neon entrained inward by convective downdrafts burns, resulting in lower neon mass in the 3D model compared to the 1D model at the time of collapse. In addition, the 3D model develops remarkable large-scale, large-amplitude asymmetries, which may have important implications for the impending gravitational collapse and subsequent explosion.
Cyber Security Challenges in Future Military Battlefield Information Networks
Authors: Ďulík M. , Ďulík M.
Published: February 2020

This paper explains the evolution of technology from obsolete military battlefield networks towards the global military battlefield information network from information and cyber security point of view. The authors focus on the threat of the communication medium which is mainly used in military battlefield information networks - the wireless channel, which is the basis of different mobile wireless systems. This paper deals with complex threats to military cyberspace, in which primarily wireless channels may be easily available by the enemy. Employed subnetworks may have different properties. A unifying extended layered model is presented in the article, which in addition to ISO/OSI model spreads cyber threat to geographic and social spheres. The article also shortly illustrates the development of electronic military warfare towards cyber military warfare.
Hydration Bags Construction Materials Resistance to Chemical Warfare Agents and their Comparison
Authors: Kiszka J. , Florus S.
Published: February 2020

When working in a contaminated area while wearing individual protective equipment, there is a high risk of overheating and dehydration. In accordance with the valid documents of the Army of the Czech Republic, a person using protective equipment has to be provided with an adequate fluid intake. To perform the work, it is necessary to equip the soldier with a hydration device that is resistant to chemical warfare agents and is structured in a way that allows its use when means of personal protection or other equipment is used. The aim of the experimental work was to verify resistance of the construction materials of hydration devices and to compare them. For this purpose, devices designed to provide resistance to chemical warfare agents and those that did not provide it were tested. To determine breakthrough times of selected materials, the MIKROTEST and the MINITEST methods were used.
Determinação de isoflavonas e antocianinas em soja preta
Authors: Leithardt Daiana Rosso Ferreira , Yamashita Aline Naomi , Beléia Adelaide Del Pino
Published: February 2020

A soja preta [Glycine max (L.) Merrill] é uma variedade de soja pouco conhecida no Brasil, que além de possuir os benefícios relacionados ao consumo da soja, apresenta antocianinas na casca, auxiliando na atividade antioxidante. Grande parte da literatura científica refere-se à soja amarela, enquanto estudos sobre a soja preta ainda são escassos. O objetivo desse estudo foi analisar grãos de soja preta e amarela, crus e cozidos, quanto ao teor dos principais compostos bioativos. A identificação e quantificação de isoflavonas por CLUE, e antocianinas pelo método do pH diferencial. Os teores de antocianinas totais nos grãos de soja preta sofreram uma redução de 83% após o cozimento. Cinco das doze formas químicas de isoflavonas foram detectadas e quantificadas nos grãos de soja preta e amarela, crus e cozidos. A forma malonilglicosídica apresentou a maior concentração nas duas cultivares, e após o cozimento houve um acréscimo da forma aglicona nas cultivares de soja preta e amarela. Assim, o consumo de soja preta ou mesmo a produção de novos alimentos a partir desses grãos poderá oferecer ao consumidor a possibilidade de diversificar a sua dieta, introduzindo um alimento com a mesma qualidade nutricional da soja amarela e, possivelmente, maiores benefícios à saúde.
Aspectos microbiológicos e higienicossanitários do queijo do Marajó, de leite de búfala: uma revisão
Authors: Figueiredo Elaine Lopes , Andrade Nélio José de , Pires Ana Clarissa Dos Santos , Peña Wilmer Edgar Luera , Figueiredo Hamilton Mendes de
Published: February 2020

Queijos elaborados artesanalmente apresentam uma microbiota particular e heterogênea para diferentes tecnologias de elaboração e área geográfica de origem, e esta microbiota pode modificar-se durante o período de maturação e de armazenamento dos derivados. O Queijo do Marajó, obtido a partir do leite de búfala, representa uma importante atividade econômica e social no Estado do Pará, em especial na Ilha do Marajó, no qual vigora a produção de forma artesanal. O objetivo do presente estudo foi realizar uma revisão de literatura sobre a microbiota do Queijo do Marajó, apresentando os principais micro-organismos benéficos, patogênicos e deterioradores que compõe essa microbiota, além de propor algumas estratégias para obter esse produto com qualidade higienicossanitária.
Aproveitamento integral e não convencional da banana verde inativada em forno micro-ondas para elaboração de farinha
Authors: Ferreira Cintia Soares , Lima Elaine Cristina de , Feijó Márcia Barreto da Silva
Published: February 2020

Decorrente da importância que os alimentos funcionais vêm despertando nos consumidores e nas indústrias alimentícias, esse trabalho objetiva elaborar uma farinha de banana verde integral (casca e polpa), através da inativação do sistema enzimático do fruto verde por micro-ondas. O fruto na forma verde é ainda pouco consumido e utilizado pela indústria, além de ser considerado uma Planta Alimentícia Não Convencional (PANC). Para o processo da farinha, utilizou-se a banana verde, cv. Prata. Os frutos foram higienizados e tiveram o seu sistema enzimático inativado através do forno micro-ondas, posteriormente os frutos forma desidratados e triturados. Foram realizadas as seguintes análises de umidade, cinzas, atividade de água, pH, acidez total, carboidratos, lipídeos, proteína bruta, fibra solúvel, fibra insolúvel, valor energético total, compostos fenólicos, índice de absorção de gordura, índice de absorção de água, índice de solubilidade em água, e as microbiológicas como Salmonella sp, Bacillus cereus, coliformes termotolerantes, Estafilococos coagulase positiva, bactérias mesófilas totais: Os resultados indicaram que a banana verde é viável para o processo de obtenção da farinha de banana, apresentando alto teor de carboidratos (66,16 g.100g-1), fibras totais (17,7 g.100g-1) e índice de absorção de gordura (414), podendo então ser inserida na elaboração de produtos cárneos, sopas e produtos de panificação, contribuindo, portanto, para o aumento do conteúdo de fibras (17,7 g.100g-1)  e diminuição de lipídeos (1,50g.100g-1). Quanto ao uso de boas práticas no processamento, a farinha encontra-se dentro do padrão microbiológico ideal e, portanto, está apta para o consumo.
A new psammophilic species of the catfish genus Ammoglanis (Siluriformes, Trichomycteridae) from the Amazon River basin, northern Brazil
Authors: Henschel Elisabeth , Bragança Pedro H. N. , Rangel-Pereira Filipe , Costa Wilson J. E. M.
Published: February 2020

Ammoglanis obliquussp. nov., a minute catfish species reaching a maximum adult size of 15.5 mm, is described from the Rio Preto da Eva drainage in the central Brazilian Amazon. It is distinguished from all of its congeners in possessing an exclusive combination of character states, including the presence and number of premaxillary and dentary teeth, number of interopercular and opercular odontodes, presence of cranial fontanel, number of dorsal-fin rays, number of anal-fin rays, number of caudal-fin rays, number of pelvic-fin rays, number of pectoral-fin rays, absence of pelvic splint, antorbital morphology, and absence of supraorbital and autopalatine morphology. It is considered to be a member of a clade also including A. pulex and A. amapaensis due to the unique oral, antorbital, and autopalatine morphology. Ammoglanis obliquus is regarded as more closely related to A. pulex than to any other congener, as both species exhibit a similar colour pattern, an absence of the metapterygoid, and the presence of two finger-like projections on the chin region.