Search results for "MEG"

Calculation of the wetting parameter from a cluster model in the framework of nanothermodynamics

2003

The critical wetting parameter ${\ensuremath{\omega}}_{c}$ determines the strength of interfacial fluctuations in critical wetting transitions. In this Brief Report, we calculate ${\ensuremath{\omega}}_{c}$ from considerations on critical liquid clusters inside a vapor phase. The starting point is a cluster model developed by Hill and Chamberlin in the framework of nanothermodynamics [Proc. Natl. Acad. Sci. USA 95, 12779 (1998)]. Our calculations yield results for ${\ensuremath{\omega}}_{c}$ between 0.52 and 1.00, depending on the degrees of freedom considered. The findings are in agreement with previous experimental results and give an idea of the universal dynamical behavior of the cluste…

ac conductivity inLa2CuO4

1992

Measurements of the complex ac conductivity are reported for a single crystal of ${\mathrm{La}}_{2}$${\mathrm{CuO}}_{4}$ for frequencies ${10}^{2}$\ensuremath{\le}\ensuremath{\nu}\ensuremath{\le}${10}^{9}$ Hz and temperatures 25\ensuremath{\le}T\ensuremath{\le}300 K. The conductivity follows a power-law behavior ${\mathrm{\ensuremath{\omega}}}^{\mathit{s}}$ with the frequency exponent s independent of temperature and independent of frequency. However, the hopping transport is strongly anisotropic, with s\ensuremath{\approxeq}0.75 within the ${\mathrm{CuO}}_{2}$ planes and s\ensuremath{\approxeq}0.25 perpendicular to the planes.

Fourier-transform spectroscopy and coupled-channels deperturbation treatment of theA 1Σ+–b 3Πcomplex of KCs

2010

The laser-induced fluorescence (LIF) A {sup 1{Sigma}+}-b {sup 3{Pi}{yields}}X {sup 1{Sigma}+} spectra of the KCs molecule were recorded in a near infrared region by a Fourier-transform spectrometer with a resolution of 0.03 cm{sup -1}. Overall more than 200 collisionally enhanced LIF spectra were rotationally assigned to {sup 39}K{sup 133}Cs and {sup 41}K{sup 133}Cs isotopomers yielding more than 3400 rovibronic term values of the strongly mixed singlet A {sup 1{Sigma}+} and triplet b {sup 3{Pi}} states with the uncertainty of 0.003-0.01 cm{sup -1}. Experimental data massive starts from the lowest vibrational level v{sub A}=0 of the singlet and nonuniformly covers the energy range E is an e…

Particle in Harmonic E-Field E ( t ) = E sin ω 0 t $$E(t)= E \sin \omega _0 t$$ ; Schwinger–Fock Proper-Time Method

2020

Since the Green’s function of a Dirac particle in an external field, which is described by a potential Aμ(x), is given by

Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g−2 Experiment

2021

The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $\omega_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run in 2018. When combined with a precision measurement of the magnetic field of the experiment's muon storage ring, the precession frequency measurement determines a muon magnetic anomaly of $a_{\mu}({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes the multiple techniques employed in the reconstruction, analysis and fitting of the data to measure the preces…

Una cabaña neolítica en los Picos de Europa

1996

La comunicación da cuenta de los trabajos realizados en la cabaña de la Calvera. Se describen los resultados de la excavación de una cabaña neolítica enmarcada en las investigaciones del conjunto megalítico de la Peña Oviedo (Camaleño, Cantabria). Se discuteu las diferentes estructuras, las industrias -microlíticas, macrolíticas y cerámica-, la función y la relación espacial y cronológica de la cabaña de la Calvera con las estructuras de la Peña Oviedo. In this paper the excavation of a neolithic house at La Calvera is reported The paper describes the results of the excavation of a neolithic house carried out within the Peña Oviedo (Camaleño, Cantabria) project. This report discusses the bu…

Gigantes ecónomicos, enanos políticos

1999

Mozambique’s Megaproject-Based Economic Model: Still Struggling with Uneven Development?

2019

Megaprojects in aluminium production, coal and natural gas extraction, and hydropower generation play a key role in the Mozambican economy. Based on the concepts of global value chains and linkages, this chapter shows that remarkable transformations are taking place in these sectors, including the expansion of production, the attraction of FDI and the emergence of new players from the Global South who now compete with transnational companies from traditional economic partner countries of Mozambique. The authors highlight potentials (in terms of economic transformation, especially positive side effects through the provision of electricity and rehabilitation of transport infrastructure) as we…

Pollination syndromes in African Marantaceae

2009

† Background and Aims The Marantaceae (550 spp.) is the most derived family in the order Zingiberales and exhibits a complex explosive pollination mechanism. To understand the evolutionary significance of this unique process of pollen transfer, comparative morphological and ecological studies were conducted in Gabon. † Methods During a total stay of 11 months, 31 species of Marantaceae were investigated at different sites in Gabon. The study included analyses of floral diversity, observations on the pollinator spectrum as well as ecological measurements (e.g. nectar sugar concentration and volume). † Key Results Analyses reveal five flower types based on flower size and pigmentation, spatia…

2014

Abstract. For the investigation of megacity emission development and the impact outside the source region, mobile aerosol and trace gas measurements were carried out in the Paris metropolitan area between 1 July and 31 July 2009 (summer conditions) and 15 January and 15 February 2010 (winter conditions) in the framework of the European Union FP7 MEGAPOLI project. Two mobile laboratories, MoLa and MOSQUITA, were deployed, and here an overview of these measurements and an investigation of the applicability of such measurements for the analysis of megacity emissions are presented. Both laboratories measured physical and chemical properties of fine and ultrafine aerosol particles as well as gas…