Color Transformations of Photometric Measurements of Galaxies in Optical and Near-Infrared Wide-Field Imaging Surveys

Over the past 2 decades, wide-field photometric surveys in optical and infrared domains reached a nearly all-sky coverage thanks to numerous observational facilities operating in both hemispheres. However, subtle differences among exact realizations of Johnson and SDSS photometric systems require one to convert photometric measurements into the same system prior to analysis of composite datasets originating from multiple surveys. It turns out that the published photometric transformations lead to substantial biases when applied to integrated photometry of galaxies from the corresponding catalogs. Here we present photometric transformations based on piece-wise linear approximations of integrated photometry of galaxies in the optical surveys SDSS, DECaLS, BASS, MzLS, DES, DELVE, KiDS, VST ATLAS, and the near-infrared surveys UKIDSS, UHS, VHS, and VIKING. We validate our transformations by constructing k-corrected color-magnitude diagrams of non-active galaxies and measuring the position and tightness of the "red sequence". We also provide transformations for aperture magnitudes and show how they are affected by the image quality difference among the surveys. We present the implementation of the derived transformations in Python and IDL and also a web-based color transformation calculator for galaxies. By comparing DECaLS and DES, we identified systematic issues in DECaLS photometry for extended galaxies, which we attribute to the photometric software package used by DECaLS. As an application of our method, we compiled two multi-wavelength photometric catalogs for over 200,000 low- and intermediate-redshift galaxies originating from CfA FAST and Hectospec spectral archives.Comment: 24 pages, 21 figures, accepted for publication in PASP. The "Color transformations" web service and the Python and IDL codes are available at https://colors.voxastro.org

МОДЕЛИРОВАНИЕ И СТРУКТУРИЗАЦИЯ СИСТЕМЫ УПРАВЛЕНИЯ ПРЕДПРИЯТИЯМИ КУРОРТНО-РЕКРЕАЦИОННОЙ СФЕРЫ НА ОСНОВЕ ЭЛЕМЕНТОВ ТЕОРИИ НЕЙРОННЫХ СЕТЕЙ: ОСНОВЫ МЕТОДОЛОГИИ

The article describes the methodology of modeling andstructuring of business networks theory. Accounting ofenvironmental factors mega-, macro- and mesolevels, theinternal state of the managed system and the error management command execution by control system implemented inthis. The proposed methodology can improve the quality of enterprise management of resort complex through a moreflexible response to changes in the parameters of the internaland external environments.В статье излагается методология моделирования и структуризации системы управления предприятиями курортно-рекреационной сферы на основе элементов теории нейронных сетей. При этом осуществляется учет факторов внешней среды на мега-, макро-и мезоуровнях, внутреннее состояние управляемой системы, точность выполненияуправляющих воздействийсистемойуправления. Предложеннаяметодологияпозволяет повысить качество управления предприятиями курортно-рекреационного комплекса за счет более гибкого реагирования на изменения параметров внутренней и внешней среды

Electrophilically Activated Nitroalkanes in Synthesis of 3,4-Dihydroquinozalines

Nitroalkanes activated with polyphosphoric acid serve as efficient electrophiles in reactions with various nucleophilic amines. Strategically placed second functionality allows for the design of annulation reactions enabling preparation of various heterocycles. This strategy was employed to develop an innovative synthetic approach towards 3,4-dihydroquinazolines from readily available 2-(aminomethyl)anilines

Improved Method for Preparation of 3-(1H-Indol-3-yl)benzofuran-2(3H)-ones

3-(1H-Indol-3-yl)benzofuran-2(3H)-ones were efficiently accessed via polyphosphoric acid-mediated condensation of 3-(2-nitrovinyl)-1H-indoles with phenols

Discutindo a educação ambiental no cotidiano escolar: desenvolvimento de projetos na escola formação inicial e continuada de professores

A presente pesquisa buscou discutir como a Educação Ambiental (EA) vem sendo trabalhada, no Ensino Fundamental e como os docentes desta escola compreendem e vem inserindo a EA no cotidiano escolar., em uma escola estadual do município de Tangará da Serra/MT, Brasil. Para tanto, realizou-se entrevistas com os professores que fazem parte de um projeto interdisciplinar de EA na escola pesquisada. Verificou-se que o projeto da escola não vem conseguindo alcançar os objetivos propostos por: desconhecimento do mesmo, pelos professores; formação deficiente dos professores, não entendimento da EA como processo de ensino-aprendizagem, falta de recursos didáticos, planejamento inadequado das atividades. A partir dessa constatação, procurou-se debater a impossibilidade de tratar do tema fora do trabalho interdisciplinar, bem como, e principalmente, a importância de um estudo mais aprofundado de EA, vinculando teoria e prática, tanto na formação docente, como em projetos escolares, a fim de fugir do tradicional vínculo “EA e ecologia, lixo e horta”.Facultad de Humanidades y Ciencias de la Educació

Air navigation: Optimisation control ofmeans cueing of the air-traffic control system

Article is devoted to one of important problems of navigation of aircraft - increase of the effectiveness of air traffic control system at the expense of cueing perfecting. In process, based on methods of the optimal control theory, is offered approach to optimization of functioning of measuring means supplying by trajectory information of motion variables of air vessels control system of air traffic. Results of simulation allowed to draw conclusion of essential increase of cueing efficiency of such system

SPACE MONITORING OF THE LARGEST AGRICULTURAL REGION IN THE INTERESTS OF ITS SUSTAINABLE DEVELOPMENT

The ways of creation and application of technologies of complex information support and monitoring of large agricultural territories are used to create basic thematically oriented means of solving problems of managing sustainable development of territories using the results of space activities. It is shown that the use of these technologies will allow us to regulate the development process when creating a set of monitoring tasks using the results of space activities, which have been called "basic elements", which allows us to shorten the development time of basic elements, create on their basis space monitoring systems, solving tasks in different sectors economy. When developing the monitoring system, it was proposed to use the domestic base geoinformation system COSMOS, providing the possibility of linking the elements of the technological chain of monitoring of territories from ready technical solutions, and in the absence of such, to create new ones. It is shown that agriculture is the most promising field of application of remote sensing data of the Earth, including in order of increasing the sustainability of territories for agrarian exploitation. Crops are well manifested in space images, are not hidden, and are single-tiered, well-decoded both in texture and spectral characteristics. The problem of ensuring sustainable development of the agricultural sector of the region is complex, which must be solved on the basis of interpenetration of space and information technologies, management technologies of large economic entities, as well as methods of systems theory and systems analysis. The purpose of the study is to analyze and develop proposals for the creation of a space monitoring system for agricultural areas in the South of Russia aimed at ensuring the sustainable development of this sector of the economy. The analysis showed that the subjects of the Russian Federation most in demand technologies for the formation, maintenance and use of the aggregate regional information resource (databases and knowledge), which has the following properties: integration with electronic maps and data of the GLONASS system; structuring by branches of the economy, territories and other management objects; updating on the basis of space images and other remote sensing systems; provision to any end-users - both the population and managers of various levels in the form of visual, accessible and regulated services. The structure of the basic geoinformation platform has been determined and justified