Search results for "53"
showing 10 items of 2908 documents
Long-term summer temperature variations in the Pyrenees from detrended stable carbon isotopes
2015
Abstract Substantial effort has recently been put into the development of climate reconstructions from tree-ring stable carbon isotopes, though the interpretation of long-term trends retained in such timeseries remains challenging. Here we use detrended δ13C measurements in Pinus uncinata tree-rings, from the Spanish Pyrenees, to reconstruct decadal variations in summer temperature back to the 13th century. The June-August temperature signal of this reconstruction is attributed using decadally as well as annually resolved, 20th century δ13C data. Results indicate that late 20th century warming has not been unique within the context of the past 750 years. Our reconstruction contains greater …
Sterile neutrinos as dark matter candidates
2021
In these brief lecture notes, we introduce sterile neutrinos as dark matter candidates. We discuss in particular their production via oscillations, their radiative decay, as well as possible observational signatures and constraints.
Ice supersaturated regions : properties and validation of ERA-Interim reanalysis with IAGOS in situ water vapour measurements
2020
Cirrus clouds and their potential formation regions, so-called ice supersaturated regions (ISSRs), with values of relative humidity with respect to ice exceeding 100 %, occur frequently in the tropopause region. It is assumed that ISSRs and cirrus clouds can change the tropopause structure by diabatic processes, driven by latent heating due to phase transition and interaction with radiation. For many research questions, a three-dimensional picture including a sufficient temporal resolution of the water vapour fields in the tropopause region is required. This requirement is fulfilled nowadays by reanalysis products such as the European Centre for Medium-Range Weather Forecasts (ECMWF)…
A Universal Length-Dependent Vibrational Mode in Graphene Nanoribbons
2019
Graphene nanoribbons (GNRs) have attracted considerable interest as their atomically tunable structure makes them promising candidates for future electronic devices. However, obtaining detailed information about the length of GNRs has been challenging and typically relies on low-temperature scanning tunneling microscopy. Such methods are ill-suited for practical device application and characterization. In contrast, Raman spectroscopy is a sensitive method for the characterization of GNRs, in particular for investigating their width and structure. Here, we report on a length-dependent, Raman active low-energy vibrational mode that is present in atomically precise, bottom-up synthesized armch…
Israel. Política económica en Israel
2018
This document presents the forecast of macroeconomic developments compiled from different sources as World Bank, International Monetary Fund, Bank of Israel, OECD, etc., in December 2018 regarding the main macroeconomic variables—GDP, inflation, unemployment, foreign trade and the real growth rate. According to international institutions staff forecast, gross domestic product (GDP) and other main macroeconomic indicators are projected till 2018 final results. We analyse the main economic data for a five years period in order to study the yearly results of the economy of Israel. Este documento presenta el pronóstico del desarrollo macroeconómico general de Israel, a parti…
Media de una población normal con varianza conocida.
2014
En la siguiente presentación se resuelve un caso práctico de contrastación paramétrica unilateral. La hipótesis hace referencia a la media de una población normal con varianza conocida.Fecha: 2014Producción: SFPIE(www.uv.es/sfpie)
VÃdeo Tabla de frecuencias Parte 1
2016
En este vÃdeo se describe cómo hacer una tabla de frecuencias;Producción: Servei de Formació Permanent
Evolución del salario mínimo interprofesional 1992-2014
2015
En la siguiente presentación se analiza la evolución del salario mínimo interprofesional en el periodo 1992 a 2014 teniendo en cuenta la evolución del IPCFecha: 2015Producción: www.uv.es/sfpie
Media de una población normal con varianza desconocida y tamaño muestral pequeño.
2015
En la siguiente presentación se resuelve un caso práctico de contrastación paramétrica unilateral. La hipótesis hace referencia a la media de una población normal con varianza desconocida y tamaño muestral pequeño.Producción: Servei de Formació Permanent i Innovació Educativa.(SFPIE) www.uv.es/sfpie
Obtención de información del INE respecto al IPC
2015
El objetivo de la siguiente presentación es obtener información del INE respecto al IPC referido a distintos periodo baseFecha: 2015