Search results for "Gari"

The aroma of strawberry (Fragaria ananassa): Characterisation of some cultivars and influence of freezing

1990

The volatiles of six strawberry (Fragaria ananassa Duch) cultivars, both fresh and deep-frozen, were isolated by direct dichloromethane extraction. Sixty compounds were identified and quantified by GC—MS. Characterisation of cultivars was achieved by applying principal component analysis to the chromatographic data. Great differences were observed. Maxim and Directeur Paul Wallbaum are rather low in volatiles while Gariguette and Tioga are rich in mesifurane (2,5-dimethyl-4-methoxy-2,3-dihydrofuran-3-one), furaneol' (2,5-dimethyl-4-hydroxy-2,3-dihydrofuran-3-one) and nerolidol. Esters are the major compounds in Senga Sengana and Vicomtesse Hericart de Thury. This last cultivar is also chara…

High-energy evolution to three loops

2018

The Balitsky-Kovchegov equation describes the high-energy growth of gauge theory scattering amplitudes as well as nonlinear saturation effects which stop it. We obtain the three-loop corrections to this equation in planar $\mathcal{N}=4$ super Yang-Mills theory. Our method exploits a recently established equivalence with the physics of soft wide-angle radiation, so-called non-global logarithms, and thus yields at the same time the three-loop evolution equation for non-global logarithms. As a by-product of our analysis, we develop a Lorentz-covariant method to subtract infrared and collinear divergences in cross-section calculations in the planar limit. We compare our result in the linear re…

Evaluating Multiple Polylogarithm Values at Sixth Roots of Unity up to Weight Six

2017

We evaluate multiple polylogarithm values at sixth roots of unity up to weight six, i.e. of the form $G(a_1,\ldots,a_w;1)$ where the indices $a_i$ are equal to zero or a sixth root of unity, with $a_1\neq 1$. For $w\leq 6$, we present bases of the linear spaces generated by the real and imaginary parts of $G(a_1,\ldots,a_w;1)$ and present a table for expressing them as linear combinations of the elements of the bases.

Resummation of Super-Leading Logarithms

2021

Jet cross sections at high-energy colliders exhibit intricate patterns of logarithmically enhanced higher-order corrections. In particular, so-called non-global logarithms emerge from soft radiation emitted off energetic partons inside jets. While this is a single-logarithmic effect at lepton colliders, at hadron colliders phase factors in the amplitudes lead to double-logarithmic corrections starting at four-loop order. This effect was discovered a long time ago, but not much is known about the higher-order behavior of these terms and their process dependence. We derive, for the first time, the all-order structure of these "super-leading logarithms" for generic $2\to l$ scattering processe…

Quantum geometry and microscopic black hole entropy

2006

9 pages, 6 figures.-- PACS nrs.: 04.60.Pp, 04.70.Dy.-- ISI Article Identifier: 000242448900013.-- Published online on Nov 28, 2006.

Effects of divergent ghost loops on the Green’s functions of QCD

2013

In the present work we discuss certain characteristic features encoded in some of the fundamental QCD Green's functions, whose origin can be traced back to the nonperturbative masslessness of the ghost field, in the Landau gauge. Specifically, the ghost loops that contribute to these Green's functions display infrared divergences, akin to those encountered in the perturbative treatment, in contradistinction to the gluonic loops, whose perturbative divergences are tamed by the dynamical generation of an effective gluon mass. In d=4, the aforementioned divergences are logarithmic, thus causing a relatively mild impact, whereas in d=3 they are linear, giving rise to enhanced effects. In the ca…

Machine learning for energy cost modelling in wastewater treatment plants.

2018

Understanding the energy cost structure of wastewater treatment plants is a relevant topic for plant managers due to the high energy costs and significant saving potentials. Currently, energy cost models are generally generated using logarithmic, exponential or linear functions that could produce not accurate results when the relationship between variables is highly complex and non-linear. In order to overcome this issue, this paper proposes a new methodology based on machine-learning algorithms that perform better with complex datasets. In this paper, machine learning was used to generate high-performing energy cost models for wastewater treatment plants, using a database of 317 wastewater…

Savant et populaire. Le post-modernisme (1977-2011) selon Charles Jencks

2015

International audience

Mirosław J. Leszka / Kirił Marinow (eds.). The Bulgarian State in 927–969. The Epoch of Tsar Peter I.

2021

Primi sondaggi sul testimone J del volgarizzamento catalano della Consolatio Philosophiae

2015

Abstract: La vicenda testuale del volgarizzamento catalano del De consolatione philosophiae di Boezio si caratterizza per la problematicita dei suoi aspetti redazionali e per la complessita della sua tradizione manoscritta. Il perduto testo originale di questa traduzione, realizzata dal frate domenicano Pere Saplana in un periodo compreso tra il 1358 e il 1362, si e infatti conservato in due redazioni differenti. La prima (?), anonima, e tramandata da un testimone completo in castigliano e da un frammento catalano. La seconda (?), tradita da un numero elevato di testimoni, e invece il risultato di un lavoro di revisione operato sul testo di Saplana dal domenicano Antoni Ginebreda (1390 c. )…