Search results for "RAM"

Continuum: A spatiotemporal data model to represent and qualify filiation relationships

2013

International audience; This work introduces an ontology-based spatio-temporal data model to represent entities evolving in space and time. A dynamic phenomenon generates a complex relationship network between the entities involved in the process. At the abstract level, the relationships can be identity or topological filiations. The existence of an identity filiation depends on whether the object changes its identity or not. On the other hand, topological filiations are based exclusively on the spatial component, like in the case of growth, reduction, merging or splitting. When combining identity and topological filiations, six filiation relationships are obtained, forming a second abstrac…

Landowner preferences and conservation prioritization : response to Nielsen et al

2017

Joint second-order parameter estimation for spatio-temporal log-Gaussian Cox processes

2018

We propose a new fitting method to estimate the set of second-order parameters for the class of homogeneous spatio-temporal log-Gaussian Cox point processes. With simulations, we show that the proposed minimum contrast procedure, based on the spatio-temporal pair correlation function, provides reliable estimates and we compare the results with the current available methods. Moreover, the proposed method can be used in the case of both separable and non-separable parametric specifications of the correlation function of the underlying Gaussian Random Field. We describe earthquake sequences comparing several Cox model specifications.

Atbalsta pasākumu īstenošana 4. klasē izglītojamiem speciālās pamatizglītības programmā ar mācīšanās traucējumiem

2021

Bakalaura darba autore ir Ramina Skuja, tēma ir “Atbalsta pasākumu īstenošana 4. klasē izglītojamiem speciālās pamatizglītības programmā ar mācīšanās traucējumiem”. Tēma ir aktuāla, jo arvien vairāk Latvijas vispārizglītojošās skolās tiek īstenotas speciālās pamatizglītības programmas. Tā ir iespēja arvien vairāk bērniem mācīties vispārējā skolā, tādējādi veicināt iekļaujošo izglītību, mazinot bērnu, kuriem ir speciālās vajadzībās, atstumšanu sabiedrībā, ļaujot viņiem iegūt izglītību atbilstoši viņu individuālajām vajadzībām. Neskatoties uz to, ka katram skolēnam, kurš mācās pēc speciālās pamatizglītības programmas, tiek piešķirti dažādi atbalsta pasākumi, tiek izveidots individuālais plāns…

“Never shake thy gory locks at me” (Macbeth, III.iv.50-51): Objecting to Gestures in Macbeth

2018

International audience; Shakespeare's Macbeth displays a pattern of characters objecting to gestures, be it others' or their own. This includes Macbeth refusing to shake hands with his opponent before the battle, his words to Banquo's ghost quoted in the title above, Banquo's own puzzlement at the weird sisters' placing a finger over their lips, the doctor's suspicions at Lady Macbeth's rubbing her hands and sleepwalking, as well as Malcom's request that Macduff not pull his hat over his eyes. In many of these cases, gesture is pitted against speech, which seems to undermine the classically-derived ideal of "suit[ing] the word to the action, the action to the word" (Hamlet, 3.2.16-18). This…

Temperature measurement in gas mixtures by femtosecond Raman-induced polarization spectroscopy

2003

European Conference on Nonlinear Optical Spectroscopy (ECONOS) MAR 30-APR 01, 2003 BESANCON, FRANCE; The potential of femtosecond Raman-induced polarization spectroscopy (RIPS) for the simultaneous determination of temperature and concentrations was investigated. These measurements were related to the rotational time response of the molecular gas mixture, which was measured as a function of the pump-probe time delay. The change of the polarizability anisotropy with respect to the vibrational levels was taken into account. The results of temperature measurements in pure CO2 showed good agreement with the values obtained by a thermocouple. The RIPS technique was also applied to a CO2-N2 gas m…

Structure and dielectric breakdown strength of nano calcium carbonate/polypropylene composites

2013

Nanodielectrics, a 21st-century phenomena, is envisioned to be the answer for material challenges in progressive high-voltage technology. It is well known that the proper dispersion of nanoparticles plays a key role in improving the dielectric properties of a material, but to understand where changes in the properties of a material originate, it is also essential to reveal the multiscale structure of the material. In this study, the dielectric permittivity, breakdown strength, and structure of nano calcium carbonate (nano-CaCO3)/polypropylene composites with 1.8-8.1 wt % doping were characterized systematically. The combined results from transmission electron microscopy, Raman microscopy, a…

BODIPY atropisomer interconversion, face discrimination, and superstructure appending

2016

International audience; A strategy was developed to append sterically hindered apical pickets on both faces of the BODIPY platform to prevent stacking and aggregation. Ortho-substitution of both the meso-phenyl ring and the boron-bound catechol affords the right directionality to append pickets, achieve face discrimination, featuring two inter-convertible atropisomers, and is reminiscent of the picket-fence strategy in porphyrins.

Optical Monitoring of Microplastics Filtrated from Wastewater Sludge and Suspended in Ethanol.

2021

The abundance of microplastics (MPs) in the atmosphere, on land, and especially in water bodies is well acknowledged. In this study, we establish an optical method based on three different techniques, namely, specular reflection to probe the medium, transmission spectroscopy measurements for the detection and identification, and a speckle pattern for monitoring the sedimentation of MPs filtrated from wastewater sludge and suspended in ethanol. We used first Raman measurements to estimate the presence and types of different MPs in wastewater sludge samples. We also used microscopy to identify the shapes of the main MPs. This allowed us to create a teaching set of samples to be characterized …

Spectroscopic characterization of alkaline earth uranyl carbonates

2005

A series of alkaline uranyl carbonates, M[UO{sub 2}(CO{sub 3}){sub 3}].nH{sub 2}O (M=Mg{sub 2}, Ca{sub 2}, Sr{sub 2}, Ba{sub 2}, Na{sub 2}Ca, and CaMg) was synthesized and characterized by inductively coupled plasma mass spectrometry (ICP-MS) and atomic absorption spectrometry (AAS) after nitric acid digestion, X-ray powder diffraction (XRD), and thermal analysis (TGA/DTA). The molecular structure of these compounds was characterized by extended X-ray absorption fine-structure (EXAFS) spectroscopy and X-ray photoelectron spectroscopy (XPS). Crystalline Ba{sub 2}[UO{sub 2}(CO{sub 3}){sub 3}].6H{sub 2}O was obtained for the first time. The EXAFS analysis showed that this compound consists of …