bluuebunny/crossref_metadata_2025 huggingface dataset:
ESTIMATION OF THE CAPABILITIES OF BROADBAND RECEIVERS FOR DETECTING BROADBAND SIGNALS
Authors: Махров В.А. , Найденов А.В.
Published: May 2021

Рассмотрена задача обнаружения радиолокационных дискретных составных частотных сигналов широкополосными приемниками с программными обнаружителями. Данный тип сигналов нашел большое применение в радиолокации благодаря высокой помехоустойчивости и энергетической скрытности. Для их обнаружения часто используют широкополосный энергетический обнаружитель, который измеряет энергию принятого сигнала, сравнивая ее с пороговым уровнем, и на основе этого выносит решение о наличии либо отсутствии сигнала. Недостатком таких устройств является факт срабатывания их на одиночные отчеты, которые могут и не являться полезным сигналом. За счет того, что обнаружение ведется в широкой полосе частот, ухудшаются возможности приема таких сигналов. Для повышения возможностей приема составных частотных сигналов применяются программные обнаружители. За счет определенных правил принятия решения возрастает качество обнаружения, а одиночные отчеты более не воспринимаются. В результате была разработана методика, позволяющая провести оценку вероятности правильного и ложного обнаружения сигналов широкополосным приемником с программным обнаружителем в системах связи с применением широкополосных сигналов на примере радиолокационных дискретных составных частотных сигналов. Показано преимущество применения программной обработки

We considered the problem of detecting radar discrete composite frequency signals by broadband receivers with software detectors. This type of signal is widely used in radar due to its high noise immunity and energy secrecy. To detect them, a broadband energy detector is often used, which measures the energy of the received signal, comparing it with a threshold level, and, based on this, makes a decision on the presence or absence of a signal. The disadvantage of such devices is the fact that they are triggered for single reports, which may not be a useful signal. Due to the fact that the detection is carried out in a wide frequency band, the ability to receive such signals is impaired. To improve the reception capabilities of composite frequency signals, software detectors are used. Due to certain decision rules, the quality of detection increases, and single reports are no longer accepted. As a result, we developed a technique that makes it possible to assess the probability of correct and false signal detection by a broadband receiver with a software detector in communication systems using wideband signals using the example of discrete composite frequency radar signals. Here we show the advantage of using software processing
STABILIZATION OF QUALITY AND PRODUCTIVITY OF GRINDING OF EXTENDED CYLINDRICAL SURFACES OF SHAFTS WITH PETAL CIRCLES
Authors: Бишутин С.Г. , Шупиков И.Л.
Published: May 2021

Статья посвящена проблеме стабилизации показателей лепесткового шлифования протяженных цилиндрических заготовок для исключения влияния изнашивания инструмента на качество и производительность данной обработки. Представлены результаты исследований влияния изнашивания абразивного инструмента на процессы съема металла и формирования шероховатости обрабатываемой поверхности при лепестковом шлифовании. Более интенсивно изнашиваются круги большей зернистости, причем стойкость инструментов зернистостью 12…20 (ГОСТ 3647- 80 (в ред. 1995 г.)) в 2…3 раза выше кругов зернистостью 40…50 и составляет 5...10 минут. Приведены данные по стойкости лепестковых шлифовальных кругов с учетом основных факторов процесса обработки. Установлено, что скорость съема металла при шлифовании неизношенными лепестковыми кругами зернистостью от 12 до 40 составляет 130...270 мм/мин, параметр шероховатости Ra находится в пределах от 0,4 до 3,0 мкм, Sm - от 0,08 до 0,20 мм. Значения параметров шероховатости обрабатываемой поверхности вследствие изнашивания инструмента возрастают до 2-3 раз, а скорость съема материала с течением времени непрерывно уменьшается и может стать равной нулю. Предлагается стабилизировать показатели лепесткового шлифования путем непрерывного или периодического увеличения деформации (натяга) инструмента в процессе абразивной обработки, что позволит поддерживать на необходимом уровне требуемое число режущих зерен

The article is devoted to the problem of stabilization of indices of petal grinding of extended cylindrical billets in order to exclude the effect of tool wear on the quality and productivity of this treatment. We present the results of studies of influence of abrasive tool wear on processes of metal removal and formation of roughness of treated surface during petal grinding. Circles of greater grain wear more intensively, and the resistance of instruments with grain 12... 20 (GOST 3647- 80 (ed. 1995)) is 2...3 times higher than circles with grain 40...50 and is 5...10 minutes. We give the data on resistance of blade grinding wheels taking into account the main factors of the processing process. We found that the rate of metal removal when grinding with unworn petal circles with grain size from 12 to 40 is 130...270 mm/min, the roughness parameter Ra can vary in the range from 0.4 to 3.0 μm, Sm - from 0.08 to 0.20 mm. The values of the roughness parameters of the treated surface due to wear of the tool increase by 2-3 times, and the rate of material removal over time continuously decreases and can become zero. We proposed to stabilize the indicators of petal grinding by continuous or periodic increase of deformation of the tool during abrasive processing, which will allow one to maintain the required number of cutting grains at the required level
Kapitał niejedno ma imię… Przemysł filmowy w świecie przedcovidowym
Authors: Lewicki Arkadiusz
Published: May 2021

Artykuł jest recenzją książki Marcina Adamczaka Kapitały przemysłu filmowego. Hollywood, Europa, Chiny (2020). Autor monografii opisuje w niej sposoby funkcjonowania współczesnego rynku filmowego. Książka składa się z trzech rozdziałów dotyczących: hollywoodzkiego systemu kinematograficznego, od jego początków do czasów obecnych; europocentrycznego podsystemu festiwalowego opartego na budowaniu prestiżu społecznego, kulturowego i symbolicznego; oraz wzrastającej roli Chin w pejzażu współczesnej produkcji i dystrybucji filmów. Książka zawiera też propozycje metodologiczne, które mogą być wykorzystywane w dalszych badaniach dotyczących nie tylko działania rynku filmowego, ale również innych przemysłów kreatywnych, choć nie sposób przewidzieć, czy w świecie postcovidowym rynki te będą funkcjonowały według zasad opisanych w książce Adamczaka.
Biogeographical importance of the Elbe Sandstones Protected Area (Labské pískovce)
Authors: Ložek Vojen
Published: May 2021

The Elbe Sandstones Protected Area is situated on one of the two main Central European biocorridors. The stream corridor of the Elbe River forms the only connection between the Bohemian and North European Lowlands and it is the only interruption of the Bohemian border mountains. Specific environmental conditions of this area are influenced not only by the intersection effect but also by the sandstone, river and summit phenomena, which provide very suitable conditions for ecological and biogeographical studies.
The Děčín District on Early Maps
Authors: Mucha Ludvík
Published: May 2021

The history of cartographical images of the Děčín District is examined. The period between early 16th to the second half of the 19th century is of main interest. Sections of early maps are shown as well.
Photodegradation Properties of Earlywood and Latewood Spruce Timber Surfaces
Authors: Preklet Edina , Tolvaj László , Tsuchikawa Satoru , Varga Dénes
Published: May 2021

Spruce (Picea abies Karst.) samples were irradiated using an ultraviolet light emitter mercury vapour lamp. The examined specimen surfaces contained earlywood or latewood to determine the photodegradation properties of these two tissue types. The generated chemical changes were monitored by diffuse reflectance Fourier transformed infrared spectroscopy. The difference spectrum method was used to present absorption changes. The earlywood suffered considerably greater degradation than the latewood during the UV irradiation. Most of the lignin molecules in the examined surface layer degraded during the first 11 days of UV irradiation for both earlywood and latewood. Results demonstrated that two types of unconjugated carbonyls absorbing at 1705 and 1764 cm–1 wavenumbers were created during the photodegradation. Time dependence of the absorption changes showed correlation between the guaiacyl lignin degradation and the generation of unconjugated carbonyl group absorbing at 1764 cm–1 wavenumber.
Optimization problems, first order approximated optimization problems and their connections
Authors:   FACULTY OF MATHEMATICS AND COMPUTER SCIENCE BABES-BOLYAI UNIVERSITY M. KOGALNICEANU 1 400084 CLUJ-NAPOCA, ROMANIA E-mail address: lory pel@yahoo.com, emilia.pop@ubbcluj.ro, POP EMILIA-LOREDANA , DUCA DOREL I. ,   FACULTY OF MATHEMATICS AND COMPUTER SCIENCE BABES-BOLYAI UNIVERSITY M. KOGALNICEANU 1 400084 CLUJ-NAPOCA, ROMANIA  E-mail address: dorelduca@yahoo.com, dduca@math.ubbcluj.ro
Published: May 2021

In this paper, we attach to the optimization problem ... where X is a subset of Rn, f : X → R, g = (g1, ..., gm) : X → Rm and h = (h1, ..., hq) : X → Rq are functions, the (0, 1) − η− approximated optimization problem (AP). We will study the connections between the optimal solutions for Problem (AP), the saddle points for Problem (AP), optimal solutions for Problem (P) and saddle points for Problem (P).
Tonellis Lemma and applications
Authors:   BABES-BOLYAI UNIVERSITY FACULTY OF ECONOMIC SCIENCES AND BUSINESS ADMINISTRATION DEPARTMENT OF STATISTICS, FORECASTS AND MATHEMATICS T. MIHALI 58-60, 400591 CLUJ-NAPOCA, ROMANIA E-mail address: anton.muresan@econ.ubbcluj.ro, MURESAN ANTON S.
Published: May 2021

In this paper we give some applications of Tonelli’s Lemma to the separation of the zeros of the solutions of some functional differential equations.
Opportunities in Optimizing Car Door Weight
Authors: Shinde Suraj , Majumder Himadri
Published: May 2021

Car door is an important part that is used for the protection of passengers from side collisions and also for the comfort of entering and leaving the car. Car doors weigh around 2% of total car weight. Conventional car doors are made from steel as it is sturdy. But it also contributes to the increment of the car weight. As scientific researchers are getting more advanced, finding out new materials as a substitute for conventionally used steel becomes more evident. Advancement in manufacturing and joining technologies pave the way to encouraging us to search for new improvement opportunities in car door weight optimization. Side impact collision of a car is the most hazardous as it directly hits the driver which causes injuries or death all over the world. Vehicle is one the medium of the terribly hazardous crashes causing injuries and death annually around the word. In this research paper, the most important parameters including materials, loads, stresses and deformation were studied to find out opportunities of car door weight optimization. Reduction in car weight means less fuel consumption which enables automobile industries to reduce carbon emission levels of a car. But the safety of passengers is the main priority which demands a light-weight as well as strong material that can sustain collision impact. The aim of the report is to compare the structure of different materials used in car door with currently used material. The designing of the car door is done using computer-aided three-dimensional interactive application (CATIA) software. Impact analysis is conducted on the door using ANSYS Workbench software by varying the materials. S-glass epoxy UD alloys become promising substitutes because of their satisfactory mechanical properties and specifific strength.
Eye Drowsiness Tiredness Detection Based on Driver Experience Using Image Mining
Authors: Raj. S Stephen , P Sripriya.
Published: May 2021

These techniques introduce eye position state and it is parameter as a feasible means of sleepiness recognition. It has been recommended that an increase of eye sleepy state might indicates sleepiness. Thus this method can be used to caution the driver’s risk if driver drives the vehicle. These suggestion were derived from investigative an example of driver’s in attentive and sleepy situation. The gadget evaluate is base on tracking of the eye retina pupil (circular area) to calculate rate of eye sleepy condition. In this research study, individual change in the path of growing sleepiness from a drivers’ eye retina is examined. Data analysis study is interest on the improvement of a prepared display of sleepiness based on an arrangement of eye white and eye black measure values. This will use very accurate operational indicator of drowsiness. However, the main constraint of measure is that driver’s may not show this eye state until they are purely sleepy and/or weaken.
Oklahoma
Authors: Christiansen Mark D.
Published: May 2021

The case of White Star Petroleum, LLC v. MUFG Union Bank, N.A. presented two questions of state law certified to the Oklahoma Supreme Court by the United States Bankruptcy Court for the Western District of Oklahoma: (1) Are the “trust funds” create[d] by Title 42 O.S. § 144.2, entitled “Creation and Appropriation of Trust Funds for Payment of Lienable Claims,” limited to obligations due nonoperator joint working interest owners, or do such funds include payments due [to] holders of mechanic’s and materialmen’s liens arising under and perfected by Title 42 O.S. § 144? (2) Does the Oil and Gas Owners’ Lien Act of 2010 grant an operator and non-operator working interest owner a lien in proceeds from purchasers of oil and gas which is prior and superior to any claim of the holder of a mechanic’s and materialmen’s lien asserted under Title 42 O.S. § 144? The above questions were certified to aid in the bankruptcy court’s resolution of two particular adversarial proceedings.
Federal Legal and Regulatory Developments Relating to the U.S. Pipeline Industry
Authors: Marie Chloe J. , Pifer Ross
Published: May 2021

The Atlantic Coast Pipeline (“ACP”) was designed as a 600-mile underground, pipeline project transporting natural gas from well sites in West Virginia to end users throughout Virginia and North Carolina. Atlantic Coast Pipeline, LLC (“Atlantic Coast”), the developer of the ACP project, began the extensive process of obtaining the necessary regulatory approvals for this project by initiating a pre-filing process with the Federal Energy Regulatory Commission (“FERC”) in October 2014. In the nearly six years that followed, the project received various permits related to water and air quality as well as other matters from state and federal agencies. At nearly every step of the way, however, opponents of the project challenged the grant of these permits. In one case, several environmental groups challenged the propriety of the U.S. Forest Service granting a right-of-way for the pipeline to traverse a portion of the Appalachian National Scenic Trail. The ensuing litigation eventually reached the U.S. Supreme Court, which rendered an opinion on June 15, 2020, upholding the grant of the right-of-way and apparently paving the way for the completion of the project. Despite receiving this favorable ruling, Duke Energy and Dominion Energy— the companies that created Atlantic Coast Pipeline, LLC as a joint venture—announced they were abandoning construction of the project on July 5, 2020.
California
Authors: Baker Joshua L. , Mahoney Ryan
Published: May 2021

Oil and gas output in California has declined as the industry faces increasing regulatory and market headwinds. However, California remains a major oil and gas producing jurisdiction at the present. California is the seventh-largest producer of crude oil in the United States and contains the fifth-largest crude oil reserves.
Montana
Authors: Brown Stephen R.
Published: May 2021

In 2019, Montana produced nearly twenty-three million barrels of crude oil, up slightly from its 2018 production, and 48.5 million cubic feet of natural gas. Through mid-2020, both crude oil and natural gas production declined by more than 25% when compared to the same period in 2012.
New Mexico
Authors: Shaheen Sharon T.
Published: May 2021

The New Mexico appellate courts issued no opinions relating to oil and gas in the past year.
Techniques Of Cognitive Development And Competence
Authors:   Dotsent, Bukhara Engineering-Technological Institute, Bukhara, Uzbekistan, Fattoxovna Djalolova Dilafruz , Narzullayevna Azimova Madina ,   Assistant, Bukhara Engineering-Technological Institute, Bukhara, Uzbekistan
Published: May 2021

The article describes the techniques of cognitive development and competence. The students with weak accomplishments are at the lowest level of these relationships, the level characterized by a lack of relation to knowledge. The cognitive technique can be labeled in different ways, but the most important thing is to define its goal, so that it is clear to the participants, so that it brings advice /instructions/ for implementation, so that it is open to modification and transformation. It must direct the study process towards thinking, towards the stages of comprehension, towards the conditionality of the relation "memorization–competence."
Development Of Ecoturism In Aydar-Arnasay Lakes System And Its Surroundings
Authors:   Candidate Of Geographical Science, Associate Professor JSPI Department Of Geography And Fundamentals Of Economics, Uzbekistan, Gudalov Mirkomil , Imamova Dilfuza ,   Associate Professor, Candidate Of Biology Science JSPI Department Of Biology Teaching Methods, Uzbekistan
Published: May 2021

The prospects of development of ecotourism with consideration of natural geographical features of Aydar-Arnasay swamp were analyzed.
Research Of Training Loads On The Simulator “Concept -2” In The Preparation Of Youth In Academic Rowing
Authors:   Uzbek State University Of Physical Culture And Sports, Uzbekistan, Azimov Zikirillo Nasrullaevich
Published: May 2021

The article studies the features of the research of training loads on the simulator “concept -2” in the preparation of youthin academic rowing . Academic rowing refers to cyclical sports, which are characterized by a significant display of endurance and speed-power abilities. The complex development of these abilities requires the use of a wide range of training tools and methods.
Influence Of Surface Additives On Strength Indicators Of Cement Systems
Authors:   Assistant, The Department Of Construction Of Buildings And Structures, Ferghana Polytechnic Institute, Ferghana, Uzbekistan, Mutalib ogli Хaydarov Abduхalil , Djurayevna Teshabayeva Nodira ,   Senior Lecturer, Department Of Construction Of Buildings And Structures, Fergana Polytechnic Institute, Fergana, Uzbekistan
Published: May 2021

In the state predostavlena, v issledovaniy yavilos ustanovlennыe vliyaniya dobavok poverxnostno - aktivnyx veshchestv na prochnostnыe pokazateli tsementnyx sistem. Definitions were made on cement of various mineralogical composition, svejemolotom and lejalom and on tsementno- peschannyx solutions and betonax.
Assessment Of Seismic Resistance Of Existing Preschool Educational Institutions And Recommendations For Their Provision Seismic Safety
Authors:   Phd Institute Of Mechanics And Seismic Resistance Of Structures Named After M.T. Urozbayev Academy Of Sciences Of The Republic Of Uzbekistan, Sagdiev Khamidulla Sadullaevich , Yuvmitov Anvar Sayfullayevich ,   Phd Institute Of Mechanics And Seismic Resistance Of Structures Named After M.T. Urozbayev Academy Of Sciences Of The Republic Of Uzbekistan, O'g'li Uktamov Botirjon Baxrom ,   Assistant Fergana Polytechnic Institute, Uzbekistan, Qodirov G`Iyosjon Mirzajonovich ,   Assistant Fergana Polytechnic Institute, Uzbekistan
Published: May 2021

The article presents the results of calculations of buildings for seismic effects, selected preschool educational institutions in Fergana, as well as some recommendations for their further safe operation.
Development Of Spatial Metal Wooden Bar Constructions Of Coatings, From Composition Wooden Elements
Authors:   Senior Lecturer, Department Of Construction Of Buildings And Structures, Fergana Polytechnic Institute, Fergana, Uzbekistan, Sultanboevich Tursunov Narimonjon
Published: May 2021

Metal wooden spatial core structure, including upper and lower grids, braces, combining the nodes of the upper and lower grids, and vertical strands, characterized in that, in order to ensure redistribution of forces and uniform load of structural elements and giving additional stiffness compressive composite small-sized boards of the upper belt and the lower metal belt with a special tensile nut to give the building a structural lift, are displaced in plan relative to each other by 45 °, while the braces in the nodes of the grids are located mutually perpendicular and in one direction they are made descending, and in the other ascending, through one node.
Methods For Generation Of Cluster Particles Of Different Stochiometry
Authors:   Academician Sadykov Institute Of Bioorganic Chemistry, Uzbekistan, Sh.T. Khozhiev , I.O. Kosimov ,   Academician Sadykov Institute Of Bioorganic Chemistry, Uzbekistan, D.M. Murodkobilov ,   Tashkent State Technical University, Uzbekistan, B.B. Gaibnazarov ,   Tashkent State Technical University, Uzbekistan, J.N. Bekmirzaev. ,   Academician Sadykov Institute Of Bioorganic Chemistry, Uzbekistan, L. Z Mutalliev. ,   Academician Sadykov Institute Of Bioorganic Chemistry, Uzbekistan
Published: May 2021

The main purpose from this paper, in semiconductor technology silicon oxide is to study notable of the surface and catalysis process. As a result, cluster fragmentation processes, we obtained information about the emission of the clusters and the chemical and physical properties of the clusters. We found during the study that oxide clusters are heterogeneous clusters. In heterogeneous clusters, the bonds in the main chain are different from the bonds in the side chain, as in organic polymers. We tried to prove on the basis of the analysis of experimental data that the formation, excitation and molecular decomposition of SinO2n + 1Hk- (k = 1-3) cluster ions are based on the model of the combinatorial synthesis mechanism.
The Analysis Of Influence Of Productions Of Open Mountain Works On Environment At Formation Of Various Zones On Deep Open-Cast Mines
Authors:   Doctor  Of  Technical Sciences ,  Professor ,  Deputy  Director Of The  Almalyk  Branch Of  NUST  “M ISiS”, Almalyk C ity, Uzbekistan, Fatidinovich Nasirov Utkir , Atoevich Ochilov Shukhratulla ,   PhD. ,  Associate Professor ,  Department  Of  Mining ,  Tashkent City , 100095,  Tashkent State  Technical Uni versity  Named  After  Islam Karimov ,  Uzbekistan, Abdurashidovich Umirzoqov Azamat ,   PhD  Scholar Of The  Department Of   Mining ,  Tashkent City , 100095,  Tashkent State Technical  University  Named  After  Islam Karimov ,  Uzbekistan
Published: May 2021

In the article ways of perfection of processes of chisel, explosive and excavation-loading works, moving of career cargoes, a sailing of formation and application of is cyclic-line technology on deep open-cast mines with is difficult-structural conditions for the purpose of reduction of an ecological damage by environment are considered. The analysis of studying of experience of development of mountain works on is difficult-structural deposits fulfilled in the open way where depth of mountain works reaches a point more than 500 m with division into the natural -technological zones is carried out.
Morpho-Functional Organization Of Hypothalamus
Authors:   Senior Lecturer Of The Department Of Biology Teaching Methods, Jizzakh State Pedagogical Institute, Uzbekistan, Pardaeva Khurshida Olimjonovna , Sobirova Zilola Olimjonovna ,   Senior Lecturer Of The Department Of Biology Teaching Methods, Jizzakh State Pedagogical Institute, Uzbekistan
Published: May 2021

This article highlights the theory of critical stages in the development of integrative brain activity in the phylogenesis of the vertebrate brain, examines the quantitative parameters of temperature and their extreme fluctuations in natural conditions; considered that the duration and intensity of the increase ,exposure to high temperatures leads to the development of hyperthermia; the facts of the negative effect of high temperature on physical performance are given, which leads to a violation of a number of body functions and the occurrence of stress reactions.
Application Of The Law Of Conservation Of Energy In Economics
Authors:   Associate Professor Bukhara State University, Uzbekistan, Farhodovna Atoeva Mehriniso , Abdishukurovna Eshmirzaeva Matluba ,   Associate Professor, Karshi Institute Of Engineering And Economics, Uzbekistan
Published: May 2021

The article is devoted to the effective use of the laws of nature for the economy. Here we are talking about the law of conservation of energy. The article will be useful for students in the field of physics.
The Methodology Of Teaching Physics Electromagnetism Lectures
Authors:   Master's Degree From Bukhara State University, Uzbekistan, Hikmatovna Fayzieva Zarifa
Published: May 2021

In this article, we are talking about private teaching methods characteristic of teaching electrical engineering disciplines, electromagnetism and their application, in subordination to the goal of developmental education. Here are presented particular questions of the methodology for teaching sections of the course of general electrical engineering, features of the practical implementation of the technology of organizing and conducting laboratory-practical classes in electrical disciplines are considered. The importance of the systematic and purposeful activity of the teacher in conducting educational and methodological work, stimulating and motivating students to master subject knowledge is shown, attention is paid to the problem of forming the professional thinking of students in the learning process. independent work in the process of studying electrical engineering disciplines. The article is intended for teachers working in the field of physics, as well as for students of the specialty "physics".
Characteristics Of Articulate Syndrome In Patients With Reactive Arthritis
Authors:   Tashkent Medical Academy, Uzbekistan, F.I. Khalmetova , K.S. Akhmedov ,   Tashkent Medical Academy, Uzbekistan
Published: May 2021

In many countries and in our country reactive arthritis (RA) is a topical rheumatologic problem requiring early and individual therapy. Recently in the diagnostics of RA there is an active search of early biomarkers (BM) of articulate structures damage, which provide revealing of the symptoms of lesion of articulate soft tissues elements at the early stages of the disease. It can also help to assess the stage of lesion and prognosis of the disease. Later it will assist to prescribe adequate therapy according to the stage of the pathological process and perform monitoring of the therapy [1].
Educación Estadística, Democracia y Empoderamiento de los Ciudadanos
Authors: Engel Joachim , Ridgway Jim , Weber Stein Florian
Published: May 2021

La democracia prospera en argumentos basados en evidencia. La desinformación e ignorancia son amenazas para nuestra forma de vida. La democracia y ciudadanía activa necesitan ciudadanos bien informados que puedan comprender los problemas sociales, debatirlos, participar activamente en la vida cívica y contribuir a la toma de decisiones públicas. En respuesta a estos retos, en este documento se introduce la Estadística Cívica, conceptualizada por el proyecto internacional ProCivicStat. La Estadística Cívica se centra en la comprensión y reflexión crítica de la información estadística sobre la sociedad, proporcionada en los medios de comunicación, las oficinas de estadística y otros organismos. Describimos las características específicas de la información que los ciudadanos reciben sobre temas cívicos y las habilidades, facetas y herramientas necesarias para comprender la información estadística sobre la sociedad. Examinamos los problemas que son esenciales para promover los cambios necesarios para introducir la enseñanza de la Estadística Cívica en los planes de estudio y la educación de los docentes, con la finalidad de para empoderar a los ciudadanos para que participen en el razonamiento basado en datos sobre temas candentes en la sociedad. Se proporcionan ejemplos del monitoreo del cambio climático y la medida de la calidad democrática.
EXPERIENCIAS DE FORMACIÓN DOCENTE EN CONTEXTOS DE INSERCIÓN E INDUCCIÓN PROFESIONAL EN INSTITUCIONES BRASILEÑAS Y URUGUAYAS
Authors: Tinti Douglas da Silva , Nakayama Bárbara Cristina Moreira Sicardi
Published: May 2021

Este texto parte da experiência de intercâmbio (prática profissional) entre instituições formadoras de professores no Brasil e no Uruguai e visa apresentar elementos para compreender como se caracterizam as práticas de inserção e indução profissional docente compartilhada. Recorremos inicialmente a alguns aportes teóricos para buscar conceituar a inserção profissional e a prática de indução. Baseando-se principalmente nas definições sobre início de carreira e inserção profissional apresentadas por Lima (1999), Vaillant & Marcelo García (2012) e indução profissional a partir das contribuições de Ferreira e Reali (2005), apresentamos experiências realizadas por quatro instituições de formação integrantes diferentes dimensões da prática profissional, articulando cultura, currículo, pesquisa, políticas e demandas pedagógicas. Os resultados nos remetem ao entendimento da colaboração e associação entre a instituição formadora e a escola de Educação Básica e a relação incontornável entre ensino, pesquisa e extensão na medida em que se configuram como poderosas marcas e experiências formativas de iniciação à docência, indução e profissionalização. inserção.
FORMACIÓN Y ENSEÑANZA: dimensiones que se cruzan en la clase de la Universidad
Authors: Starling Cláudia , Saraiva Ana Maria Alves
Published: May 2021

El proceso educativo como elemento constitutivo de la sociedad ha experimentado importantes cambios en las últimas décadas. La producción académica presenta nuevas perspectivas teóricas para el rol de la escuela, del docente y los procesos de enseñanza y aprendizaje, resultando en diferentes acciones y concepciones sobre la formación y la práctica pedagógica. Así, el objetivo de este artículo es comprender el proceso de inserción de maestros universitarios, problematizando las relaciones entre formación, expectativas y trabajo real. Los datos presentados provienen de investigaciones que tienen como objetivo comprender el proceso de inserción de profesores en universidades federales. Partiendo de la perspectiva (auto) biográfica, el estudio se basa en la entrevista narrativa como dispositivo de investigación. En el camino, presentamos las narrativas de uno de los docentes, participante de la investigación más amplia, que trabaja en la Licenciatura en Matemáticas, dialogando con estudios sobre gestión de clases y gestión de asignaturas, en una perspectiva reflexiva sobre el ejercicio de la docencia. el concepto de desarrollo profesional docente. Los resultados indican que las condiciones y contextos en los que se desarrolla la docencia, combinados con las trayectorias de los docentes, refuerzan la necesidad de implementar procesos de formación colaborativa en la Educación Superior.
Caracterización de las Tareas propuestas sobre Tablas Estadísticas en Libros de Texto Chilenos de Educación Básica
Authors: Pallauta Jocelyn D. , Gea María M. , Arteaga Pedro
Published: May 2021

El objetivo del trabajo es caracterizar las tareas escolares relacionadas con las tablas estadísticas presentadas en libros de texto chilenos de 5º a 8º (10 a 13 años) de educación básica, que se distribuyen gratuitamente en el sistema público y subvencionado de Chile. Se realiza un análisis de contenido de las tareas, estudiando: el tipo de tabla y su complejidad semiótica, contexto (entre los considerados en el informe PISA), la actividad planteada y el nivel de lectura requerido para desarrollarla. Se observa predominancia de tablas de frecuencias, sin incremento de la complejidad semiótica según nivel educativo. La principal actividad propuesta es el cálculo a partir de datos de la tabla, seguido de la lectura y traducción, con un nivel de lectura elemental de los datos representados. Se utilizan todos los contextos sugeridos en PISA, con predominio del personal, y se añaden los experimentos aleatorios como nuevo contexto.
Facetas de la Estadística Cívica Implícitas en una Experiencia de Enseñanza centrada en el Estudio de Indicadores Sociales
Authors: Tauber Liliana Mabel
Published: May 2021

A partir de una investigación de diseño, se desarrolló una propuesta didáctica centrada en el estudio de indicadores sociales y asociada a ella, se diseñó una evaluación continua. Se describen las distintas etapas de la investigación, identificando las modificaciones y ampliaciones realizadas durante cuatro años. Además, se expone un análisis de contenido centrado en las facetas de la Estadística Cívica, realizado sobre la experiencia aplicada en 2020, que estuvo centrada en un enfoque de aula y aprendizaje invertidos. Se describen y analizan las producciones de algunos estudiantes, a lo largo del cursado y al finalizar el proceso de evaluación. Se analizan las potencialidades y limitaciones de la propuesta, brindando una valoración de la misma en función de las facetas de la Estadística Cívica. A partir de las producciones de los estudiantes, se brindan evidencias de las relaciones complejas que logran establecer cuando trabajan con datos reales y contextos propios de su área, se describen distintos razonamientos y se analizan algunos perfiles típicos según las facetas de la Estadística Cívica. La experiencia permite mostrar que, aunque los estudiantes no dispongan de conocimientos previos, es posible implementar un proceso de estudio que propicie el pensamiento estadístico y el cuestionamiento sobre la información.
Biosynthesis and Characterization of Silver Nanoparticles from Bitter Melon (Momordica charantia) Fruit and Seed Extract and their Antimicrobial Activity
Authors: Umme Ruman  , Poonah Kia
Published: May 2021

Momordica charantia is a phenolic rich vegetable. In this study, the fruits and seeds extract of M. charantia were used to synthesize silver nanoparticles (Ag NPs) using biotechnological approach. Structural, morphological, and antimicrobial properties of the synthesized Ag-NPs were characterized using UV/Vis Spectrophotometry, Dynamic Light Scattering (DLS), High Resolution Transmission Electronics Microscopy (HRTEM), Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray diffraction (XRD). In DLS, the average particle size of Ag-NPs was found 17.5 ± 2.1 nm and 18.3 ± 1.9 nm using seed and fruit extract, respectively. HRTEM has revealed their spherical structure for both seed and fruit extract of M. charantia. FESEM images found Ag-NPs with the size between ~20 and ~35 nm. The Ag NPs exhibited Surface Plasmon Resonance (SPR) centered at 405 nm for seed extract and 402 nm for fruit extract using a UV–visible spectrophotometer. FT-IR results showed phenolic and carbohydrate compounds involved in the synthesis of the Ag NPs. Furthermore, the synthesized Ag NPs has found highly rich in antibacterial properties against Escherichia coli and Pseudomonas aeruginosa bacterium. Thus, bioconversion of Ag NPs by M. charantia could be employed as a potential antibacterial source to eliminate pathogenic microorganisms from agricultural and food preservation industry.
Microwave Irradiation Assisted Synthesis of Silver Nanoparticles using Pullulan as Reducing Agent and Its Antibacterial Activity
Authors: Mohd Shahrul Nizam Salleh  , Sangetha Cheladorai  , Roshafima Rasit Ali  , Kamyar Shameli  , Zatil Izzah Tarmizi  , Justin Chan Zhe
Published: May 2021

In this studies, synthesis of silver nanoparticles (Ag-NPs) on pullulan-based biofilm was achieved by microwave irradiation technique. Synthesis of Ag-NPs was achieved using pullulan as both a reducing and stabilizing agent. The effect of different microwave irradiation duration on pullulan and silver nitrate in synthesis of silver nanoparticles (Ag-NPs) was investigated. The synthesized Ag-NPs/PL were first screened and identified using surface plasmon peaks of UV–Vis spectroscopy. The research results indicated that the surface plasmon resonance peaks were observed between 400–414 nm wavelengths in UV-VIS spectroscopy studies. From Fourier-transform infrared spectroscopy (FTIR) spectra, stretching vibrations of hydroxyl (OH), carbonyl (C=O) and C=C stretches exhibits the reduction and stabilization of Ag-NPs. Further, five characteristic peaks Ag(111), Ag(200), Ag(210), Ag(220) and Ag(311) confirmed the presence of elemental silver and the crystalline structure of silver nanoparticles from X-ray Diffraction analysis. Biofilms were produced by mixing the synthesized Pulullan-Ag-NPs with polyvinyl alcohol. The AgNP/PL were applied for the antimicrobial activity against Bacillus subtilis and found to have high antibacterial activity. In addition, the clear zones of inhibition was found at 11 mm to 16 mm against Bacillus Subtillis. The experimental results demonstrated that pullulan could be used as reducing and stabilizing agent for formation of Ag-NPs.
Avaliação de desempenho na experiência de gestão colaborativa do INSS no seguro defeso
Authors: Andrade Luiz Henrique Alonso de
Published: May 2021

De forma a contornar as restrições que enfrenta na concessão do Seguro Defeso, o INSS adotou uma política de gestão colaborativa, por meio de parcerias com as entidades representativas dos pescadores artesanais. Este artigo verifica a hipótese de que a política adotada pode ser capaz de promover ganhos de desempenho sob as dimensões de efetividade e equidade, na perspectiva do próprio pescador, na região do litoral sul da Bahia. É empregado o método de diferenças em diferenças, comparando indicadores entre os pescadores atendidos de forma convencional e aqueles objetos da intervenção, durante os períodos de defeso do camarão no Nordeste em 2015 e 2016. Os resultados são complementados com informações levantadas em entrevistas com gestores do INSS e representantes dos pescadores. Não apenas são verificados ganhos significativos de desempenho, mas também são apontadas restrições de natureza qualitativa.
OPPORTUNITIES FOR THE DEVELOPMENT OF A GREEN ORGANISATION IN THE CONTEXT OF NATIONAL AND INTERNATIONAL STRATEGIC DOCUMENTS AND INICIATIVES
Authors: SKAČKAUSKIENĖ Ilona , SMIRNOVA Juliana
Published: May 2021

The article emphasizes the aspects of organisational development in the context of green organisation, de-
scribing the importance of changes in an external environment for the development of the organisation.
Purpose – the purpose of the article is to analyse the relevance of green organisation development at the national and
international levels by examining it through the prism of strategic documents and initiatives. In order to determine the
development directions of the green organisation on the basis of strategic documents and initiatives.
Research methodology – the methods of critical analysis of scientific literature, strategic documents, initiatives and
synthesis as well as abstrahation have been applied.
Findings – main findings of the research proved that development of green organisation is relevant in the context of key
international and national strategic documents. Also the definition of the development of green organisations is proposed
by authors. The analysis of strategic documents and initiatives at the national and international levels has shown that
their impact on the development of a green organisation can be both direct and indirect.
Research limitations – the limitation of this reseach is that mainly key international and national strategic documents
were analyzed. Analysis of other strategic documents can be stated as a direction for future research.
Practical implications – the results of the research could be used as a basis for the promotion of the development of
green organisations at the national and international level both directly and indirectly.
Originality/Value – the originality of this research can be defined by complex approach to analysis related to the impact
of actual legal regulation to the development of green organisations.
GAME EQUILIBRIUM BASED CONTROL ANALYSIS ON THE SUSTAINABLE MARKET STRUCTURE OF RARE METAL MINERAL RESOURCES – EVIDENCE FROM CHINA
Authors: Ding Shijie , Huang Jianbai , Zhang Xiaodan , Zhong Meirui
Published: May 2021

In rare metal mineral market, as a complex system, multiple decision-making among the stakeholders increases the complexity in its market structure and dynamic process. The unreasonable compensation pricing mechanism for the development of the rare metal mineral resources in China requires to be studied. Drawing on the methods of game theory model and chaos control analysis, this paper builds theoretical model of rare metal mineral market structure, corporating related parameters of rare metal in the game theory model, to conduct the chaotic nature and path analysis, expecting to solve the bottleneck problems that restrict the rare metal pricing and resource security and enhance the waste valorization for the sustainability. Specificly, a Cournot-Nash Equilibrium model is built to analyze the Cournot-equilibrium point, the stability of the Cournot Equilibrium point, the chaotic status, as well as the pattern to chaos of the game system in the rare metal mineral resource market, numerical simulation is used to verify the model. The conclusions facilitate the formulation of industrial economic policies and further improvement of managerial strategies to solve market problems.
IN MEMORIAM: PROF. PRANAS BALTRĖNAS (1940–2021)
Authors: Grubliauskas Raimondas
Published: May 2021

“In memoriam: Prof. Prof. Pranas Baltrėnas (1940–2021)”. Journal of Environmental Engineering and Landscape Management, 29(2), pp. 72
First Observations of Anomalous Cosmic Rays in to 36 Solar Radii
Authors: Rankin J. S. , McComas D. J. , Leske R. A. , Christian E. R. , Cohen C. M. S. , Cummings A. C. , Joyce C. J. , Labrador A. W. , Mewaldt R. A. , Posner A. , Schwadron N. A. , Strauss R. D. , Stone E. C. , Wiedenbeck M. E.
Published: May 2021

NASA’s Parker Solar Probe mission continues to travel closer to the Sun than any prior human-made object, with an expected closest approach of <10 solar radii (<0.046 au) by 2024. On board, the Integrated Science Investigation of the Sun instrument suite makes unprecedented in situ measurements of energetic particles in the near-Sun environment. The current low level of solar activity offers a prime opportunity to measure cosmic rays closer to the Sun than ever before. We present the first observations of anomalous cosmic rays in to 36 solar radii (0.166 au), focusing specifically on helium. Our results indicate a strong radial intensity gradient of ∼25 ± 5%/au over energies of ∼4 to ∼45 MeV/nuc. These values are larger than prior observations, further out in the heliosphere, and come at a unique time in our understanding and modeling of particle transport and acceleration, particularly as both Voyagers have crossed the heliopause and IBEX has accumulated a full solar cycle of observations. Thus, continued measurements of cosmic rays by Parker Solar Probe will play a critical role in linking past observations with our present knowledge and significantly advancing our understanding of cosmic ray transport in the heliosphere.
Effects of Photoionization and Photoheating on Lyα Forest Properties from Cholla Cosmological Simulations
Authors: Villasenor Bruno , Robertson Brant , Madau Piero , Schneider Evan
Published: May 2021

The density and temperature properties of the intergalactic medium (IGM) reflect the heating and ionization history during cosmological structure formation, and are primarily probed by the Lyα forest of neutral hydrogen absorption features in the observed spectra of background sources. We present the methodology and initial results from the Cholla IGM Photoheating Simulation (CHIPS) suite performed with the graphics process unit–accelerated Cholla code to study the IGM at high, uniform spatial resolution maintained over large volumes. In this first paper, we examine the IGM structure in CHIPS cosmological simulations that include IGM uniform photoheating and photoionization models where hydrogen reionization is completed early or by redshift z ∼ 6. Comparing with observations of the large- and small-scale Lyα transmitted flux power spectra P(k) at redshifts 2 ≲ z ≲ 5.5, the relative agreement of the models depends on scale, with the self-consistent Puchwein et al. IGM photoheating and photoionization model in good agreement with the flux P(k) at k ≳ 0.01 s km−1 at redshifts 2 ≲ z ≲ 3.5. On larger scales, the P(k) measurements increase in amplitude from z ∼ 4.6 to z ∼ 2.2, faster than the models, and lie in between the model predictions at 2.2 ≲ z ≲ 4.6 for k ≈ 0.002–0.01 s km−1. We argue that the models could improve by changing the He ii photoheating rate associated with active galactic nuclei to reduce the IGM temperature at z ∼ 3. At higher redshifts, z ≳ 4.5, the observed flux P(k) amplitude increases at a rate intermediate between the models, and we argue that for models where hydrogen reionization is completed late (z ∼ 5.5–6), resolving this disagreement will require inhomogeneous or “patchy” reionization. We then use an additional set of simulations to demonstrate that our results have numerically converged and are not strongly affected by varying cosmological parameters.
A Search for Cloud Cores Affected by Shocked Carbon Chain Chemistry in L1251
Authors: Liu 刘 X.-C. 训川 , Wu Y. , Zhang 张 C. 超 , Chen X. , Lin L.-H. , Qin S.-L. , Liu T. , Henkel C. , Wang J. , Liu H.-L. , Yuan J. , Yuan L.-X. , Li J. , Shen Z.-Q. , Li D. , Esimbek J. , Wang K. , Li L.-X. , Kim Kee-Tae , Zhu L. , Madones D. , Inostroza-Pino N. , Meng F.-Y. , Zhang T. , Tatematsu K. , Xu Y. , Ju B.-G. , Kraus A. , Xu F.-W.
Published: May 2021

We searched for shocked carbon chain chemistry (SCCC) sources with C3S abundances surpassing those of HC5N toward the dark cloud L1251, using the Effelsberg telescope at the K band (18–26 GHz). L1251-1 and L1251-3 are identified as the most promising SCCC sources. The two sources harbor young stellar objects. We conducted mapping observations toward L1251-A, the western tail of L1251, at λ ∼ 3 mm with the Purple Mountain Observatory 13.7 m and the Nobeyama Radio Observatory 45 m telescopes in lines of C2H, N2H+, CS, HCO+, SO, HC3N, and C18O as well as in CO 3–2 using the James Clerk Maxwell Telescope (JCMT). The spectral data were combined with archival data including Spitzer and Herschel continuum maps for further analysis. Filamentary substructures labeled as F1–F6 were extracted in L1251, with F1 being associated with L1251-A hosting L1251-1. The peak positions of dense gas traced by HCO+ are misaligned relative to those of the dust clumps. Episodic outflows are common in this region. The twisted morphology of F1 and velocity distribution along L1251-A may originate from stellar feedback. SCCC in L1251-1 may have been caused by outflow activities originated from the infrared source IRS1. The signposts of ongoing SCCC and the broadened line widths of C3S and C4H in L1251-1 as well as the distribution of HC3N are also related to outflow activities in this region. L1251-1 (IRS1) together with the previously identified SCCC source IRS3 demonstrate that L1251-A is an excellent region to study SCCC.