L’évolution des enfants difficiles

Dans cet article, les auteurs relatent une recherche faite, dans le cadre du projet Concordia Longitudinal Risk Project, sur l'ajustement des enfants socialement atypiques durant l'adolescence. Plus précisément, ils tentent de répondre à la question suivante: Quels comportements de l'enfant et quelles tangentes de son développement mènent à des problèmes psychologiques majeurs à l'adolescence et à l'âge adulte? Après une analyse complexe de divers facteurs, leurs résultats indiquent que les enfants perçus comme agressifs, repliés sur eux-mêmes ou souvent agressifs et repliés sur eux-mêmes par leur camarades, sont susceptibles d'avoir des problèmes à l'adolescence. Ils explicitent ensuite selon ces trois groupes les difficultés de chacun.In this article, the authors discuss a study carried out during a Concordia Longitudinal Risk Project that deals with the adjustment of socially atypical children in their adolescent years. More precisely, they try to answer the following question : What child behaviors and which tangents of their development lead to major psychological problems as an adolescent and as an adult? After a complex analysis of various factors, their results indicate that children perceived as aggressive, keeping to themselves or often aggressive and keeping to themselves because of peer pressure, are liable to have problems in their adolescent years. The authors then elaborate on the difficulties experienced by each of these three groups

До питання про взаємодію публічної адміністрації та суб’єктів благодійнти

Сербин Р. А. До питання про взаємодію публічної адміністрації та суб’єктів благодійництва / Р. А. Сербин // Lex Portus : юрид. наук. журн. / редкол. : С. В. Ківалов (голов. ред. ради), Б. А. Кормич (голов. ред.), І. В. Сафін (заст. голов. ред.), Т. В. Аверочкіна (наук. ред., відп. секр.) [та ін.] ; НУ "ОЮА", ГО "МА Святий Миколай". - Херсон : ФОП Грінь Д. С., 2017. - № 1. - C. 87-96.У статті з метою удосконалення організаційно-правового механізму благодійництва та благодійної діяльності в Україні охарактеризовано особливості взаємодії публічної адміністрації та суб’єктів благодійництва. Автором визначено взаємодію суб’єктів публічної адміністрації із суб’єктами благодійництва як спонтанний або спланований процес зв’язку між двома та більше суб’єктами, що здійснюється за допомогою наявних засобів у формі боротьби чи співробітництва та спрямований на досягнення визначених цілей.В статье с целью усовершенствования организационно-правового механизма благотворительности и благотворительной деятельности в Украине охарактеризованы особенности взаимодействия публичной администрации и субъектов благотворительности. Автором определено взаимодействие субъектов публичной администрации с субъектами благотворительности как спонтанный или спланированный процесс связи между двумя и более субъектами, осуществляемый с помощью имеющихся средств в форме борьбы или сотрудничества и направлен на достижение определенных целей.The article describes the features of public administration and business philanthropy, to improve charity and philanthropy in Ukraine. The author defines the88 interaction of public administration entities with the subjects of charity, which is spontaneous or planned process of communication between two or more entities, implemented using available tools in the form of struggle or cooperation and aims to achieve these goals

Повышение устойчивости процессов горения в камере сгорания ГТД газодинамическим совершенствованием проточной части

Сербин, С. И. Повышение устойчивости процессов горения в камере сгорания ГТД газодинамическим совершенствованием проточной части = Increasing the stability of combustion processes in the combustion chamber of GAS-Turbine engine through the improvement of the airgas channel / С. И. Сербин, А. В. Козловский // Вісн. НТУ «ХПІ». Сер. Енергетичні та теплотехнічні процеси й устаткування. – Харків : НТУ «ХПІ», 2016. – № 9 (1181). – С. 65–69.A possibility of carrying out the numerical experiment using the up-to-date tools of computational hydrodynamics to predict pulsating combustion modes at the stage of engine development has been discussed. It will allow us to considerably reduce the expenditures required for the engine design and its development increasing simultaneously the operating efficiency of power systems. The purpose of this investigation is to increase the stability of combustion processes of gaseous fuel in the low-emission combustion chambers of gas turbine engines due to the gas-dynamic improvement of the air-gas channel. Theoretical studies showed that the gas-dynamic improvement of the air-gas channel in the low-emission combustion chambers of gas turbine engines allows us to enlarge the range of the stable operation of fuel-combustion system, to reduce pressure pulsations in the air-fuel mixture, and consequently reduce the vibrations of elements in the combustion chamber and in the engine on the whole. Theoretical investigations of the pulsation characteristics of the low emission combustion chamber with the preliminary mixing of air-fuel mixture for the gas turbine engine of 25 MW allowed us to establish that amplitude maximum pressure pulsations are observed in the paraxial recirculation zone, in the region of secondary air inlets; inside the flame tube in the region of the third and fourth cowlings; on inlet diffuser walls, in the output cross-section of flame tube before the turbine blades; on peripheral swirler blades, in the region of fuel outflow orifices and in swirler channels. The most efficient reduction of pulsations is observed in the primary combustion zone and the pulsations produced by the central vortex in the mixing zone closer to the chamber output are less efficient.Статья посвящена вопросу стабилизации пульсационных процессов в камерах сгорания газотурбинных двигателей за счет газодинамического совершенствования проточной части. Проведен анализ пульсационных процессов в низкоэмиссионной камере сгорания газотурбинного двигателя с помощью современных инструментов вычислительной гидродинамики. Проведены теоретические исследования пульсационных характеристик низкоэмиссионной камеры сгорания с предварительным перемешиванием топливо-воздушной смеси Разработаны практические рекомендации по повышению устойчивости горения в низкоэмиссионной камере сгорания ГТД

Computing matrix functions solving coupled differential models

In this paper a modification of the method proposed in [E. Defez, L. Jódar, Some applications of Hermite matrix polynomials series expansions, Journal of Computational and Applied Mathematics 99 (1998) 105–117] for computing matrix sine and cosine based on Hermite matrix polynomial expansions is presented. An algorithm and illustrative examples demonstrate the performance of the new proposed method. © 2009 Elsevier Ltd. All rights reserved.Defez Candel, E.; Sastre, J.; Ibáñez González, JJ.; Ruíz Martínez, PA. (2009). Computing matrix functions solving coupled differential models. Mathematical and Computer Modelling. 50(5):831-839. doi:10.1016/j.mcm.2009.05.012S83183950

The pharmacognosy investigation of associated coumarins Lupinus luteus L.

The genus Lupinus (Lupinus L.) is attributed to the legumes family (Fabaceae L.). About 1000 herbaceous, semi-bush and shrub, annual, winter and perennial lupines are described. In this paper we focuses on the issue of pharmacognostical study of plants is widely used in animal breeding, is the active substance in the manufacture of dietary supplements - the yellow lupine (Fabaceae). Harvested grass were analyzed after acid hydrolysis. Gas-liquid chromatography was first performed with mass spectrometric detection of hydrolysed raw material of Lupinus luteus L., where 56 compounds were found, of which 35 components were identified. After hydrolysis, the raw material of L. luteus L. contained a number of biologically active substances – fatty acids, alcohols, ketones etc. Two components from the class of true coumarins were identified: coumarin (16.4 mg%) and 6–methylcoumarin (2.7 mg%)

Повышение экологичности камер сгорания ГТД использованием слаботочных плазмохимических стабилизаторов

Сербин, С. И. Повышение экологичности камер сгорания ГТД использованием слаботочных плазмохимических стабилизаторов = Increasing the Ecological Efficiency of Combustion Chambers in Gas-Turbine Engines Using Low-Current Plasmochemical Stabilizers / С. И. Сербин, А. В. Козловский // Вісн. НТУ «ХПІ». Сер. Енергетичні та теплотехнічні процеси й устаткування. – Харків : НТУ «ХПІ», 2017. – № 9 (1231). – С. 29–33.Стаття присвячена питанню зниження викидів токсичних компонентів в камерах згоряння газотурбінних двигунів за рахунок використання слабкострумових плазмохімічних стабілізаторів. Проведено аналіз нестаціонарних процесів в низькоемісійній камері згоряння газотурбінного двигуна за допомогою сучасних інструментів обчислювальної гідродинаміки. Розроблено практичні рекомендації щодо підвищення екологічності горіння газоподібного палива в низькоемісійній камері згоряння ГТД.Consideration is given to the numerical experiment carried out using the state-of-the-art tools of computational hydrodynamics to predict the emission level of toxic components at the engine design stage that would allow for a considerable reduction of expenditures required for the engine design and its development and also increase the operation efficiency of power systems. The purpose of this research was to increase the ecological efficiency of the combustion of gaseous fuel in the low-emission combustion chambers of gas turbine engines (GTE) due to the use of low-current plasmochemical stabilizers. The theoretical research done showed that the use of low current plasmochemical stabilizers for low-emission combustion chambers of GTE enables to expand the range of stable operation of the fuel firing device and decrease the emission level of toxic components. Theoretical investigation of pulsation performances of the low-emission combustion chamber with a preliminary mixing of the fuel-&-air mixture of GTE 25 MW allowed us to establish that the plasmochemical stabilization of processes in the combustion chamber would enable an increase in the service life of flue tubes and gas-turbine engines on the whole, getting an economic effect due to the reduction of the emissions of toxic components.Статья посвящена вопросу снижения выбросов токсичных компонентов в камерах сгорания газотурбинных двигателей за счет использования слаботочных плазмохимических стабилизаторов. Проведен анализ нестационарных процессов в низкоэмиссионной камере сгорания газотурбинного двигателя с помощью современных инструментов вычислительной гидродинамики. Разработаны практические рекомендации по повышению экологичности горения газообразного топлива в низкоэмиссионной камере сгорания ГТД

A novel model–data fusion approach to terrestrial carbon cycle reanalysis across the contiguous U.S using SIPNET and PEcAn state data assimilation system v. 1.7.2

The ability to monitor, understand, and predict the dynamics of the terrestrial carbon cycle requires the capacity to robustly and coherently synthesize multiple streams of information that each provide partial information about different pools and fluxes. In this study, we introduce a new terrestrial carbon cycle data assimilation system, built on the PEcAn modeldata eco-informatics system, and its application for the development of a proof-of-concept carbon "reanalysis" product that harmonizes carbon 5 pools (leaf, wood, soil) and fluxes (GPP, Ra, Rh, NEE) across the contiguous United States from 1986- 2019. We first calibrated this system against plant trait and flux tower Net Ecosystem Exchange (NEE) using a novel emulated hierarchical Bayesian approach. Next, we extended the Tobit-Wishart Ensemble Filter (TWEnF) State Data Assimilation (SDA) framework, a generalization of the common Ensemble Kalman Filter which accounts for censored data and provides a fully Bayesian estimate of model process error, to a regional-scale system with a calibrated localization. Combined with additional 10 workflows for propagating parameter, initial condition, and driver uncertainty, this represents the most complete and robust uncertainty accounting available for terrestrial carbon models. Our initial reanalysis was run on an irregular grid of   500 points selected using a stratified sampling method to efficiently capture environmental heterogeneity. Remotely sensed observations of aboveground biomass (Landsat LandTrendr) and LAI (MODIS MOD15) were sequentially assimilated into the SIPNET model. Reanalysis soil carbon, which was indirectly constrained based on modeled covariances, showed general agreement 15 with SoilGrids, an independent soil carbon data product. Reanalysis NEE, which was constrained based on posterior ensemble weights, also showed good agreement with eddy flux tower NEE and reduced RMSE compared to the calibrated forecast. Ultimately, PEcAn’s carbon cycle reanalysis provides a scalable framework for harmonizing multiple data constraints and providing a uniform synthetic platform for carbon monitoring, reporting, and verification (MRV) and accelerating terrestrial carbon cycle research.Published versio