Charge conjugation from space-time inversion in QED: discrete and continuous groups

We show that the CPT groups of QED emerge naturally from the PT and P (or T) subgroups of the Lorentz group. We also find relationships between these discrete groups and continuous groups, like the connected Lorentz and Poincar\'e groups and their universal coverings.Comment: 7 page

The CPT group of the spin-3/2 field

We find out that both the matrix and the operator CPT groups of the spin-3/2 field (with or without mass) are respectively isomorphic to $D_4\rtimes\mathbb{Z}_2$ and $Q\times\mathbb{Z}_2$. These groups are exactly the same groups as for the Dirac field, though there is no a priori reason why they should coincide.Comment: 9 pages. We are replacing the original version (v1) because there was a mistake in the calculation which led to wrong group

Charge Conjugation from Space-Time Inversion

We show that the CPT group of the Dirac field emerges naturally from the PT and P (or T) subgroups of the Lorentz group.Comment: 4 pages, no figure

Influence of high-pressure processing at different temperatures on free amino acid and volatile compound profiles of dry-cured ham

The effect of high pressure processing (HPP) (600 MPa during 6 min) at different temperatures (0, 20 and 35 °C) in dry-cured ham has been studied in order to optimize the technique and reduce its impact on chemical characteristics, which are widely related with sensorial parameters. Vacuum-packed slices from 120 dry-cured hams were used. These slices were submitted to four different treatments: without application of pressure or temperature (CO), high pressure treatment at 0 °C (HPP-0), high pressure treatment at 20 °C (HPP-20), and high-pressure treatment at 35 °C (HPP-35). The effect of the treatments on free amino acids and volatile compounds profile was evaluated. The HPP-35 treatment significantly (P < 0.001) increased the total free amino acid content (6415.63 mg/100g dry matter) when compared to the contents of the CO, HPP-0 and HPP-20 treatments (5313.16, 4787.30 and 5072.48 mg/100g dry matter, respectively). Significant differences were also found among treatments in the content of 13 individual free amino acids, and HPP-35 samples presented the highest values in 12 of them. Similarly, the total volatile compound content was influenced by temperature-assisted HPP treatments. The HPP-35 treated samples showed the highest content (78,415.27 AU × 103/g dry-cured ham) and the HPP-0 treated samples the lowest content (28,584.14 AU × 103/g dry-cured ham). No significant differences were observed between CO and HPP-20 treatments. The fractions of volatile compounds derived from lipolysis, proteolysis and microbial activity were significantly modified by the different treatments. HPP-0 samples presented lower values of alcohol and hydrocarbon contents, whereas HPP-35 samples showed higher ketone and ester contents.info:eu-repo/semantics/acceptedVersio

Les Coves de Santa Maira (Castell de Castells, La Marina Alta-Alacant):

Es presenta una descripció preliminar de la seqüència arqueològica de les Coves de Santa Maira (Castell de Castells). Els conjunts arqueològics i les datacions C 14 obtingudes indiquen que la cavitat registra ocupacions humanes estratificades entre el XIV i el VI mil·lenni BP, amb materials arqueològics que poden ser relacionats amb el magdalenià superior, epipaleolític sauvaterrià, mesolític i neolític II. Des d’aquest moment la cavitat es va fer servir, bàsicament, de corral per al tancament de ramat domèstic. Paraules clau: Cova. Magdalenià. Epipaleolític. Mesolític. Neolític. Marina Alta (Alacant).A preliminary description of the archaeological sequence of Les Coves de Santa Maira (Castell de Castells) is offered. Archaeological assemblies and obtained C 14 datings indicate that the cavity registers stratified human occupations between 14th and 6th millenium BP, with archaeological record that can be related to the Upper Magdalenian, Sauveterroid Epipaleolithic Period, Mesolithic and Neolithic II. Since this moment the cavity had a function, basically, of corral for the closing of domestic cattle. Key Words: Cave. Magdalenian. Epipaleolithic. Mesolithic. Neolithic. Marina Alta (province of Alicante).Se ofrece una descripción preliminar de la secuencia arqueológica de las Coves de Santa Maira (Castell de Castells). Los conjuntos arqueológicos y las dataciones C 14 obtenidas indican que la cavidad registra ocupaciones humanas estratificadas entre el XIVº y VIº milenio BP, con materiales arqueológicos que pueden ser relacionados con el Magdaleniense superior, Epipaleolítico sauveterroide, Mesolítico y Neolítico II. A partir de este momento la cavidad tuvo una función, básicamente, de corral para el cierre del ganado doméstico. Palabras Clave: Cueva. Magdaleniense. Epipaleolítico. Mesolítico. Neolítico. Marina Alta (Alicante)

A young and complex binary star - HD 144432

The southern emission-line star HD 144432 has received considerable attention due to its relative brightness (V ~ 8.17), its late spectral type (late A-type or perhaps early F) and its relative isolation from a bona-fide active star formation region. We present new imaging and spectroscopic data of this star, which in the past has been classified as both evolved (post-AGB) object and an isolated Herbig Ae/Be star. We confirm the presence of a faint companion source located 1.4 arcseconds north, which appears physically associated with HD 144432. New infrared spectroscopy reveals this companion to be a late-type (early-mid K) star, devoid of any emission lines. Furthermore, we confirm the pre-main sequence nature of this object, report the detection of Li I 6707.8 AA absorption toward the HD 144432 system, and its apparent association with Sco OB2-2 located at 145 pc.Comment: 9 pages, 11 figures, accepted by A&

Co-located wind and wave energy farms: Uniformly distributed arrays

publisher: Elsevier articletitle: Co-located wind and wave energy farms: Uniformly distributed arrays journaltitle: Energy articlelink: http://dx.doi.org/10.1016/j.energy.2016.07.069 content_type: article copyright: © 2016 Elsevier Ltd. All rights reserved

Influence of the length of hospitalisation in post-discharge outcomes in patients with acute heart failure: Results of the LOHRCA study

Objective: To investigate the relationship between length of hospitalisation (LOH) and post-discharge outcomes in acute heart failure (AHF) patients and to ascertain whether there are different patterns according to department of initial hospitalisation. Methods: Consecutive AHF patients hospitalised in 41 Spanish centres were grouped based on the LOH (15 days). Outcomes were defined as 90-day post-discharge all-cause mortality, AHF readmissions, and the combination of both. Hazard ratios (HRs), adjusted by chronic conditions and severity of decompensation, were calculated for groups with LOH >6 days vs. LOH <6 days (reference), and stratified by hospitalisation in cardiology, internal medicine, geriatrics, or short-stay units. Results: We included 8563 patients (mean age: 80 (SD = 10) years, 55.5% women), with a median LOH of 7 days (IQR 4–11): 2934 (34.3%) had a LOH 15 days. The 90-day post-discharge mortality was 11.4%, readmission 32.2%, and combined endpoint 37.4%. Mortality was increased by 36.5% (95%CI = 13.0–64.9) when LOH was 11–15 days, and by 72.0% (95%CI = 42.6–107.5) when >15 days. Conversely, no differences were found in readmission risk, and the combined endpoint only increased 21.6% (95%CI = 8.4–36.4) for LOH >15 days. Stratified analysis by hospitalisation departments rendered similar post-discharge outcomes, with all exhibiting increased mortality for LOH >15 days and no significant increments in readmission risk. Conclusions: Short hospitalisations are not associated with worse outcomes. While post-discharge readmissions are not affected by LOH, mortality risk increases as the LOH lengthens. These findings were similar across hospitalisation departments

Acculturation of Pacific mothers in New Zealand over time: findings from the Pacific Islands Families study

Immigration and acculturation are increasingly recognized as important explanatory factors for health disparities, although their impact on oral health is less well understood. This study investigates the relationship between Pacific children's cultural orientation and oral health, after adjusting for potentially moderating and confounding variables