Search results for "element"
showing 10 items of 13601 documents
Trace elements in carbonate raw materials being used in cement and lime industry in Opole Province
2009
Identifying Oscillatory Hyperconnectivity and Hypoconnectivity Networks in Major Depression Using Coupled Tensor Decomposition
2021
AbstractPrevious researches demonstrate that major depression disorder (MDD) is associated with widespread network dysconnectivity, and the dynamics of functional connectivity networks are important to delineate the neural mechanisms of MDD. Cortical electroencephalography (EEG) oscillations act as coordinators to connect different brain regions, and various assemblies of oscillations can form different networks to support different cognitive tasks. Studies have demonstrated that the dysconnectivity of EEG oscillatory networks is related with MDD. In this study, we investigated the oscillatory hyperconnectivity and hypoconnectivity networks in MDD under a naturalistic and continuous stimuli…
Modeling friction between shearing brittle surfaces with a discrete element method
2018
Hauraiden materiaalien murtuminen on eräs materiaalifysiikan peruskysymyksistä. Sille ei ole vieläkään olemassa täydellistä teoreettista selitystä, joten ennusteiden tekeminen nojaa vahvasti kokeisiin ja niihin perustuviin numeerisiin malleihin. Tässä työssä suunnittelemme ja toteutamme diskreettielementtimenetelmän sellaisen fysikaalisen systeemin tutkimiseen, jossa kaksi haurasta pintaa leikkaavat toisiaan. Keskitymme erityisesti siihen kuinka erilaiset voimamallit sisäiselle kitkalle vaikuttavat materiaalin ulkoiseen kitkaan. Käyttämällä graniittia koemateriaalina huomaamme, että sen ulkoinen kitka riippuu voimakkaasti sen sisäisestä kitkasta, kun ulkoinen paine on lähellä materiaalin pu…
Materiales magnéticos híbridos formados por moléculas magnéticas biestables insertadas en redes bimetálicas de coordinación basadas en el ligando oxa…
2013
The preparation and characterisation of [FeIII(sal2-trien)][MnIICrIII(ox)3]·CH2Cl2 and [FeIII(sal2-trien)][MnIICrIII(ox)3]·0.75CH3OH·0.5H2O is presented in Chapter 2. The use of [FeIII(sal2-trien)]+ leads, depending on the synthetic conditions, to two different structures. Compound [FeIII(sal2-trien)][MnIICrIII(ox)3]·CH2Cl2 presents a 2D network and shows coexistence of a complete spin-crossover and a ferromagnetic ordering from the bimetallic oxalate network around 5 K. The second compound, [FeIII(sal2-trien)] [MnIICrIII(ox)3]·0.75CH3OH·0.5H2O, with a 3D achiral network, exhibits a partial spincrossover besides the ferromagnetic ordering. The formation of two different oxalate networks wit…
The Use of Question Modification Strategies to Differentiate Instruction in Eritrean Mathematics and Science Classrooms
2023
This qualitative study aimed at examining the question modification strategies Eritrean elementary and middle school teachers used to differentiate their instruction and meet the diversity in the classroom as well as the functions these strategies served in classroom interactions. The research data consisted of videotaped recordings (N = 11 videotaped lessons) of classroom interactions in eight mathematics and science classrooms, which were analysed through interaction analysis. The findings showed that Eritrean teachers utilised the following five question modification strategies either independently or in combination: repetition; rephrasing; clarification; decomposition; and code-switchin…
Demo 17. Coordenadas curvilíneas: cilindro y esfera
2013
Objetivo: Adquirir familiaridad con las coordenadas cilíndricas y esféricas mediante un modelo real o 3D previo a la representación en el plano mediante la perspectiva.
Social media communications and festival brand equity: Millennials vs Centennials
2019
Abstract The proliferation of live music festivals in Spain has involved for festival managers the need to differentiate their events, creating brand equity through marketing communications, especially in social media. Given the variability in the ages of festival attendees, the present paper aims at analyzing the moderating role of the generational cohort in the influence of social media communications on brand equity creation and its correlates. A personal survey has been conducted for a sample of 622 attendees of the main live music festival in Spain. Respondents have been asked about their perceptions of festival social media communications, the core variables of brand equity, overall b…
El ejercicio físico y la promoción de la salud en la infancia y la juventud
1992
SummaryThe «new health consciousness» that emerged in the developing countries in the 70s and 80s, has contributed to consider exercise as an element of health promotion. But it can establish simplistic relationships between exercise and health, particularly critical for professionals who develop promotion programmes. In this paper, five problematic aspects linked, to exercise and health relationships both in children and youngsters, are discussed and should be taken into account when promoting health programmes. We refer to: 1) the problematic role of exercise in health promotion and in physical education curriculum as an area of privileged action in children and youngsters; 2) the automat…
RAÍCES MITOLÓGICAS EN LA ICONOGRAFÍA DE LA BELLA DURMIENTE EL CASO DE LA BELLA DURMIENTE DE WALT DISNEY
2020
Sleeping Beauty is a story we can all tell. A cursed princess who pricks herself and falls into a deep sleep until her prince wakes her up. But, like all stories, she has evolved into this form. If we trace its origins, the first time it was put down on paper was in the 13th century. Later, in the 14th century, three more versions were added. In the 17th century Giambattista Basile popularized it, but in that same century Perrault adapted it to his own way and in the 19th century the Brothers Grimm simplified it. Through all these forms there remains an essence, a common narrative, some characteristic elements that allow us to identify this story as the same one. And in them we …
SPI/INTEGRAL in-flight performance
2003
The SPI instrument has been launched on-board the INTEGRAL observatory on October 17, 2002. SPI is a spectrometer devoted to the sky observation in the 20 keV-8 MeV energy range using 19 germanium detectors. The performance of the cryogenic system is nominal and allows to cool the 19 kg of germanium down to 85 K with a comfortable margin. The energy resolution of the whole camera is 2.5 keV at 1.1 MeV. This resolution degrades with time due to particle irradiation in space. We show that the annealing process allows the recovery of the initial performance. The anticoincidence shield works as expected, with a low threshold at 75 keV, reducing the GeD background by a factor of 20. The digital …