85 research outputs found
A topological signature of multipartite entanglement
In this manuscript, we present a proposal to relate topological structure of
worldline configurations to multipartite entanglement. Configurations result
from the path-integral formulation of the density matrix in the limit of zero
temperature. We consider hard-core bosons for which configurations, i.e.
collections of particle paths, can be seen as geometric braids with a certain
topological structure. We propose that properties of worldline configurations
may realize a comprehensive deciphering of multipartite entanglement. By means
of Monte Carlo calculations, we study checkerboard, stripe, valence-bond
solids, topologically ordered spin liquid, and superfluid phase.
We find that each ground-state is characterized by a certain `topological
spectrum' which can be used to differentiate among different ground-states.Comment: 6 pages, 3 figures and supplemental material. Version 2 focuses on
the discussion of topological signatures of multipartite entanglement in the
ground-state expansion, with added results. The study of phase transitions
and permutation cycles in version 1 has been moved to a new manuscript:
arXiv:1912.00080. Version 3 corrected some typos and reference
Permutation cycles of hardcore Bose-Hubbard models on square and Kagome lattices
In this paper, we study the statistics of permutation cycles of ground-state
hardcore lattice bosons described by various two-dimensional Bose-Hubbard-type
models on both square and Kagome lattices. We find that it is possible to
differentiate quantum phases by the statistics of permutations cycles. Indeed,
features in the permutation cycles statistics can be used to uniquely identify
certain insulating phases, and are consistent with local resonances of
occupation numbers in the ground-state expansion of the phase. We also confirm
that suitable quantities derived from the probability distribution of the
length of permutation cycles can be used to detect superfluid to insulator
phase transitions.Comment: 7 pages, 9 figures. The study of phase transitions and permutation
cycles originally part of manuscript arXiv:1905.07454v1 (version 1) has been
moved to this manuscript while the discussion of topological signatures of
multipartite entanglement in the ground-state expansion has been further
developed in version 2 of manuscript arXiv:1905.07454v
Epidemiologic study of patients attending the Stomatology Service at Osep Dental Clinic during the 2009 - 2015 period
El presente trabajo consiste en una investigaciĂłn de tipo
retrospectivo sobre la prevalencia de pacientes que concurrieron
al servicio de EstomatologĂa de OSEP durante
el periodo comprendido entre los años 2009 al 2015.
Se analizaron los datos de 693 historias clĂnicas, con el
objetivo de determinar la prevalencia de las patologĂas
estomatolĂłgicas diagnosticadas, incluyendo distribuciĂłn
e influencia en cuanto a edad, sexo y lugar de procedencia.
Además, se estableciĂł la relaciĂłn entre las patologĂas
estomatolĂłgicas y los factores de riesgo asociados y/o enfermedades
sistĂ©micas. Para el procesamiento estadĂstico
de los datos obtenidos, se trabajĂł sobre el fraccionamiento
de la base de datos, obteniendo como resultados que
el mayor porcentaje corresponde al sexo femenino, entre
60 y 69 años de edad; provenientes del Gran Mendoza; la
patologĂa más frecuente fuĂ© liquen, seguido de hiperplasia
y leucoplasia. Las localizaciones más frecuentes fueron
carrillos, labio inferior y cara dorsal de lengua.This work is a retrospective research on the prevalence
of stomatological diseases of patients attending OSEP
Stomatology Service during the 2009 -2015 period.
Data from 693 medical records were analyzed in
order to determine the prevalence of stomatological
diagnosed diseases. It also aims to establish the
relationship between stomatological diseases and
associated risk factors and / or systemic diseases. For statistical processing of the data obtained, we worked
on the splitting of the database, obtaining as results the
highest percentage corresponds to females, between
60 and 69 years old, from the Great Mendoza. The most
common disease is lichen, followed by hyperplasia and
leukoplakia. The most common locations are cheeks,
lower lip and tongue dorsum.Fil: Sansone, Fabio.
Universidad de MendozaFil: Aguado, Cecilia BeatrĂz.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Portillo, MarĂa laura.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Bomprezzi, SofĂa Paola.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Fontana Bustos, Ana Melisa.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Jorquera, MarĂa Eliana.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Alonso, MarĂa Gabriela.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina
Retrospective statistical analysis of patients with carcinomas in the stomatology service of the OSEP Dental Center during a period of 15 months
Se realizĂł un análisis observacional, descriptivo y retrospectivo en el servicio de EstomatologĂa del Centro OdontolĂłgico OSEP de la provincia de Mendoza, con el objetivo de determinar el nĂşmero de pacientes con diagnĂłstico histopatolĂłgico confirmado de carcinoma epidermoide en un periodo de 15 meses, desde febrero de 2020 a mayo de 2021.
Para ello se analizaron las historias clĂnicas de 88 pacientes, de los cuales 5 pacientes tuvieron diagnĂłstico definitivo de carcinoma mediante biopsias.
Los datos analizados mediante la recopilaciĂłn de historias clĂnicas fueron: edad, sexo, motivo de la consulta, tiempo de evoluciĂłn, comorbidades, factores de riesgo asociados, presencia de adenopatĂas y diagnĂłstico definitivo histopatolĂłgico.
El resultado obtenido fue una mayor prevalencia del sexo femenino, entre los 55 y 83 años, asociado a factores de riesgo locales y siendo las localizaciones mas frecuentes lengua, piso de boca y mucosa yugal.An observational, descriptive and retrospective analysis was carried out in the Stomatology service of the OSEP Dental Center of the province of Mendoza, with the aim of determining the number of patients with a confirmed
histopathological diagnosis of squamous cell carcinoma in a period of 15 months, from February of 2020 to May 2021.
For this, the clinical histories of 88 patients were analyzed, of which 5 patients had a definitive diagnosis of carcinoma through biopsies.
The data analyzed by collecting medical records were: age, sex, reason for consultation, time of evolution, comorbidities, associated risk factors, presence of lymphadenopathy and histopathological definitive diagnosis.
The result obtained was a higher prevalence of the female sex, between 55 and 83 years of age, associated with local risk factors and the most frequent locations being the tongue, floor of the mouth and the jugal mucosa.Fil: SimĂłn, Carolina.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Sansone, Fabio.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Puche, MarĂa Sol.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Campagna, Celeste.
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina)Fil: Caputo, Guillermo .
ClĂnica OdontolĂłgica OSEP (Mendoza, Argentina
The erythrocyte membrane lipidome profile in healthy dogs and changes in dogs with diabetes mellitus
Clinical differences among the elderly admitted to the emergency department for accidental or unexplained falls and syncope
It is difficult to distinguish unexplained falls (UFs) from accidental falls (AFs) or syncope in older people. This study was designed to compare patients referred to the emergency department (ED) for AFs, UFs or syncope. Data from a longitudinal study on adverse drug events diagnosed at the ED (ANCESTRAL-ED) in older people were analyzed in order to select cases of AF, syncope, or UF. A total of 724 patients (median age: 81.0 [65–105] years, 66.3% female) were consecutively admitted to the ED (403 AF, 210 syncope, and 111 UF). The number of psychotropic drugs was the only significant difference in patients with AF versus those with UF (odds ratio [OR] 1.44; 95% confidence interval 1.17–1.77). When comparing AF with syncope, female gender, musculoskeletal diseases, dementia, and systolic blood pressure >110 mmHg emerged as significantly associated with AF (OR 0.40 [0.27–0.58], 0.40 [0.24–0.68], 0.35 [0.14–0.82], and 0.31 [0.20–0.49], respectively), while valvulopathy and the number of antihypertensive drugs were significantly related to syncope (OR 2.51 [1.07–5.90] and 1.24 [1.07–1.44], respectively). Upon comparison of UF and syncope, the number of central nervous system drugs, female gender, musculoskeletal diseases, and SBP >110 mmHg were associated with UF (OR 0.65 [0.50–0.84], 0.52 [0.30–0.89], 0.40 [0.20–0.77], and 0.26 [0.13–0.55]), respectively. These results indicate specific differences, in terms of demographics, medical/pharmacological history, and vital signs, among older patients admitted to the ED for AF and syncope. UF was associated with higher use of psychotropic drugs than AF. Our findings could be helpful in supporting a proper diagnostic process when evaluating older patients after a fall
Direct Imaging of Transient Fano Resonances in N2 Using Time-, Energy-, and Angular-Resolved Photoelectron Spectroscopy
Autoionizing Rydberg states of molecular N2 are studied using time-, energy-, and angular-resolved photoelectron spectroscopy. A femtosecond extreme ultraviolet pulse with a photon energy of 17.5 eV excites the resonance and a subsequent IR pulse ionizes the molecule before the autoionization takes place. The angular-resolved photoelectron spectra depend on pump-probe time delay and allow for the distinguishing of two electronic states contributing to the resonance. The lifetime of one of the contributions is determined to be 14±1 fs, while the lifetime of the other appears to be significantly shorter than the time resolution of the experiment. These observations suggest that the Rydberg states in this energy region are influenced by the effect of interference stabilization and merge into a complex resonance
Ultrastable, high-repetition-rate attosecond beamline for time-resolved XUV-IR coincidence spectroscopy
The implementation of attosecond photoelectron-photoion coincidence
spectroscopy for the investigation of atomic and molecular dynamics calls for a
high-repetition-rate driving source combined with experimental setups
characterized by excellent stability for data acquisition over time intervals
ranging from a few hours up to a few days. This requirement is crucial for the
investigation of processes characterized by low cross sections and for the
characterization of fully differential photoelectron(s) and photoion(s) angular
and energy distributions. We demonstrate that the implementation of
industrial-grade lasers, combined with a careful design of the delay line
implemented in the pump-probe setup, allows one to reach ultrastable
experimental conditions leading to an error in the estimation of the time
delays of only 12 as. This result opens new possibilities for the investigation
of attosecond dynamics in simple quantum systems
Probing the therapeutic potential of marine phyla by spe extraction
The marine environment is potentially a prolific source of small molecules with significant biological activities. In recent years, the development of new chromatographic phases and the progress in cell and molecular techniques have facilitated the search for marine natural products (MNPs) as novel pharmacophores and enhanced the success rate in the selection of new potential drug candidates. However, most of this exploration has so far been driven by anticancer research and has been limited to a reduced number of taxonomic groups. In this article, we report a test study on the screening potential of an in-house library of natural small molecules composed of 285 samples derived from 57 marine organisms that were chosen from among the major eukaryotic phyla so far represented in studies on bioactive MNPs. Both the extracts and SPE fractions of these organisms were simultaneously submitted to three different bioassays—two phenotypic and one enzymatic—for cytotoxic, antidiabetic, and antibacterial activity. On the whole, the screening of the MNP library selected 11 potential hits, but the distribution of the biological results showed that SPE fractionation increased the positive score regardless of the taxonomic group. In many cases, activity could be detected only in the enriched fractions after the elimination of the bulky effect due to salts. On a statistical basis, sponges and molluscs were confirmed to be the most significant source of cytotoxic and antimicrobial products, but other phyla were found to be effective with the other therapeutic target
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