294 research outputs found
Disparidades de gênero em mortalidade: desafios para a equidade na saúde em Porto Rico
The aim of this study is to deepen the analysis of mortality indicators by sex in Puerto Rico. The gender perspective is used to identify the differentials and inequalities that generate disparities in mortality among women and men in that country. In 2008-2010, life expectancy at birth for both sexes reached 78.83 years, with a gap of 7.71 years among women and men, which is higher in the group of very low mortality countries, internationally. The years of potential life lost (YPLL) by age and external causes of death and natural death are used, among other indicators, for further analysis of male mortality from a gender perspective. Young men have a very high premature mortality because many deaths are due to by external causes: homicides, suicides and accidents. In the case of women's, premature deaths are prevalent due natural causes in all age groups. The result of the study is to promote gender mainstreaming to achieve health equity for women and men. Puerto Rico requires health plans, programs and policies that take into account gender disparities in order to achieve a longer life span-free of preventable disease, disability, injury and premature death- which currently affects more men than women.El objetivo de este estudio es profundizar en el análisis de indicadores de mortalidad por sexos en Puerto Rico, desde la perspectiva de género, con el propósito de conocer diferenciales y desigualdades que generan disparidades en la mortalidad de mujeres y hombres en ese país. En 2008-2010 la esperanza de vida al nacer de ambos sexos alcanzó 78.83 años, con una brecha de 7.71 años entre mujeres y hombres, la más elevadas en el conjunto de países de mortalidad muy baja, a escala internacional. Se utilizan los años potenciales de vida perdidos (APVP) por edades y causas de muerte externas y naturales, entre otros indicadores de mortalidad, para profundizar en el análisis de la sobre mortalidad masculina, desde una perspectiva de género. La mortalidad prematura reporta pérdidas elevadas de años de vida, en hombres jóvenes, por causas de muerte externas -homicidios, suicidios y accidentes; en el caso de las mujeres, prevalecen las causas de muerte natural en la mortalidad prematura de todas las edades. Los resultados del estudio promueven la incorporación de la perspectiva de género para lograr la equidad en salud de mujeres y hombres. En Puerto Rico se requieren planes, programas y políticas de salud, que tomen en cuenta las disparidades de género para lograr una vida más larga, libre de enfermedades evitables, invalidez, lesiones y muerte prematura, que en la actualidad afectan más a los hombres que a las mujeres.O objetivo deste estudo é aprofundar na análise de indicadores de mortalidade por sexos em Porto Rico, desde a perspectiva de gênero, com o propósito de conhecer diferenciais e desigualdades que geram disparidades na mortalidade de mulheres e homens nesse país. Em 2008-2010 a expectativa de vida ao nascer de ambos os sexos alcançou 78,83 anos, com uma diferença de 7,71 anos entre mulheres e homens, a mais elevadas no conjunto de países de mortalidade muito baixa, na escala internacional. Utilizam-se os anos potenciais de vida perdidos (APVP) por idades e causas de morte externas e naturais, entre outros indicadores de mortalidade, para aprofundar na análise da mortalidade masculina, desde uma perspectiva de gênero. A mortalidade prematura reporta perdas elevadas de anos de vida, em homens jovens, por causas de morte externas - homicídios, suicídios e acidentes; no caso das mulheres, prevalecem as causas de morte natural na mortalidade prematura de todas as idades. Os resultados do estudo promovem a incorporação da perspectiva de gênero para obter a equidade em saúde de mulheres e homens. Em Porto Rico requerem-se planos, programas e políticas de saúde, que levem em consideração as disparidades de gênero para conseguir uma vida mais longa, livre de doenças evitáveis, invalidez, lesões e morte prematura, que na atualidade afetam mais aos homens que às mulheres
Near-IR and optical radial velocities of the active M-dwarf star Gl 388 (AD Leo) with SPIRou at CFHT and SOPHIE at OHP
Context: The search for extrasolar planets around the nearest M-dwarfs is a
crucial step towards identifying the nearest Earth-like planets. One of the
main challenges in this search is that M-dwarfs can be magnetically active and
stellar activity can produce radial velocity (RV) signals that could mimic
those of a planet.
Aims: We aim to investigate whether the 2.2 day period observed in optical
RVs of the nearby active M-dwarf star Gl 388 (AD Leo) is due to stellar
activity or to a planet which co-rotates with the star as suggested in the
past.
Methods: We obtained quasi-simultaneous optical RVs of Gl 388 from 2019 to
2021 with SOPHIE (R75k) at the OHP in France, and near-IR RV and Stokes V
measurements with SPIRou at the CFHT (R70k).
Results: The SOPHIE RV time-series displays a periodic signal with
2.230.01 days period and 23.60.5 m/s amplitude, which is consistent
with previous HARPS observations obtained in 2005-2006. The SPIRou RV
time-series is flat at 5 m/s rms and displays no periodic signals. RV signals
of amplitude higher than 5.3 m/s at a period of 2.23 days can be excluded with
a confidence level higher than 99%. Using the modulation of the longitudinal
magnetic field (Bl) measured with SPIRou, we derive a stellar rotation period
of 2.23050.0016 days.
Conclusions: SPIRou RV measurements provide solid evidence that the periodic
variability of the optical RVs of Gl 388 is due to stellar activity rather than
to a co-rotating planet. The magnetic activity nature of the optical RV signal
is further confirmed by the modulation of Bl with the same period. The SPIRou
campaign on Gl 388 demonstrates the power of near-IR RV to confirm or infirm
planet candidates discovered in the optical around active stars. SPIRou
observations reiterate how effective spectropolarimetry is at determining the
stellar rotation period.Comment: 25 pages, 23 figures, Accepted by Astronomy and Astrophysic
Optical and near-infrared stellar activity characterization of the early M dwarf Gl~205 with SOPHIE and SPIRou
The stellar activity of M dwarfs is the main limitation for discovering and
characterizing exoplanets orbiting them since it induces quasi-periodic RV
variations. We aim to characterize the magnetic field and stellar activity of
the early, moderately active, M dwarf Gl205 in the optical and nIR domains. We
obtained high-precision quasi-simultaneous spectra in the optical and nIR with
the SOPHIE spectrograph and SPIRou spectropolarimeter between 2019 and 2022. We
computed the RVs from both instruments and the SPIRou Stokes V profiles. We
used ZDI to map the large-scale magnetic field over the time span of the
observations. We studied the temporal behavior of optical and nIR RVs and
activity indicators with the Lomb-Scargle periodogram and a quasi-periodic GP
regression. In the nIR, we studied the equivalent width of Al I, Ti I, K I, Fe
I, and He I. We modeled the activity-induced RV jitter using a
multi-dimensional GP regression with activity indicators as ancillary time
series. The optical and nIR RVs have similar scatter but nIR shows a more
complex temporal evolution. We observe an evolution of the magnetic field
topology from a poloidal dipolar field in 2019 to a dominantly toroidal field
in 2022. We measured a stellar rotation period of Prot=34.40.5 d in the
longitudinal magnetic field. Using ZDI we measure the amount of latitudinal
differential rotation (DR) shearing the stellar surface yielding rotation
periods of Peq=32.01.8 d at the stellar equator and Ppol=45.50.3 d at
the poles. We observed inconsistencies in the activity indicators'
periodicities that could be explained by these DR values. The multi-dimensional
GP modeling yields an RMS of the RV residuals down to the noise level of 3 m/s
for both instruments, using as ancillary time series H and the BIS in
the optical, and the FWHM in the nIR.Comment: 41 pages, 24 figures. Accepted for publication in A&A. Improved
quality of figures and reduced size of Appendi
A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134
Funding: ACC and TGW acknowledge support from STFC consolidated grant numbers ST/R000824/1 and ST/V000861/1, and UKSA grant number ST/R003203/1. RDH is funded by the UK Science and Technology Facilities Council (STFC)’s Ernest Rutherford Fellowship (grant no. ST/V004735/1). SD is funded by the UK Science and Technology Facilities Council (grant no. ST/V004735/1). BSL is funded by a UK Science and Technology Facilities Council (STFC) studentship (ST/V506679/1). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement SCORE no. 851555).We present the characterisation of an inner mini-Neptune in a 9.2292005±0.0000063 day orbit and an outer mono-transiting sub-Saturn planet in a 95.50+0.36-0.25 day orbit around the moderately active, bright (mv = 8.9 mag) K5V star TOI-2134. Based on our analysis of five sectors of TESS data, we determine the radii of TOI-2134b and c to be 2.69±0.16 R⊕ for the inner planet and 7.27±0.42 R⊕ for the outer one. We acquired 111 radial-velocity spectra with HARPS-N and 108 radial-velocity spectra with SOPHIE. After careful periodogram analysis, we derive masses for both planets via Gaussian Process regression: 9.13+0.78-0.76 M⊕ for TOI-2134b and 41.89+7.69-7.83 M⊕ for TOI-2134c. We analysed the photometric and radial-velocity data first separately, then jointly. The inner planet is a mini-Neptune with density consistent with either a water-world or a rocky core planet with a low-mass H/He envelope. The outer planet has a bulk density similar to Saturn’s. The outer planet is derived to have a significant eccentricity of 0.67+0.05-0.06 from a combination of photometry and RVs. We compute the irradiation of TOI-2134c as 1.45±0.10 times the bolometric flux received by Earth, positioning it for part of its orbit in the habitable zone of its system. We recommend further RV observations to fully constrain the orbit of TOI-2134c. With an expected Rossiter-McLaughlin (RM) effect amplitude of 7.2±1.3 m-1, we recommend TOI-2134c for follow-up RM analysis to study the spin-orbit architecture of the system. We calculate the Transmission Spectroscopy Metric, and both planets are suitable for bright-mode NIRCam atmospheric characterisation.Publisher PDFPeer reviewe
The EBLM Project XI. Mass, radius and effective temperature measurements for 23 M-dwarf companions to solar-type stars observed with CHEOPS
Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and radii predicted by theoretical stellar structure models. This ``radius inflation'' problem could have an impact on both stellar and exoplanetary science. We present the final results of our observation programme with the CHEOPS satellite to obtain high-precision light curves of eclipsing binaries with low mass stellar companions (EBLMs). Combined with the spectroscopic orbits of the solar-type companion, we can derive the masses, radii and effective temperatures of 23 M-dwarf stars. We use the PYCHEOPS data analysis software to analyse their primary and secondary occultations. For all but one target, we also perform analyses with TESS light curves for comparison. We have assessed the impact of starspot-induced variation on our derived parameters and account for this in our radius and effective temperature uncertainties using simulated light curves. We observe trends for inflation with both metallicity and orbital separation. We also observe a strong trend in the difference between theoretical and observational effective temperatures with metallicity. There is no such trend with orbital separation. These results are not consistent with the idea that observed inflation in stellar radius combines with lower effective temperature to preserve the luminosity predicted by low-mass stellar models. Our EBLM systems are high-quality and homogeneous measurements that can be used in further studies into radius inflation
Estimating the Worldwide Extent of Illegal Fishing
Illegal and unreported fishing contributes to overexploitation of fish stocks and is a hindrance to the recovery of fish populations and ecosystems. This study is the first to undertake a world-wide analysis of illegal and unreported fishing. Reviewing the situation in 54 countries and on the high seas, we estimate that lower and upper estimates of the total value of current illegal and unreported fishing losses worldwide are between 23.5 bn annually, representing between 11 and 26 million tonnes. Our data are of sufficient resolution to detect regional differences in the level and trend of illegal fishing over the last 20 years, and we can report a significant correlation between governance and the level of illegal fishing. Developing countries are most at risk from illegal fishing, with total estimated catches in West Africa being 40% higher than reported catches. Such levels of exploitation severely hamper the sustainable management of marine ecosystems. Although there have been some successes in reducing the level of illegal fishing in some areas, these developments are relatively recent and follow growing international focus on the problem. This paper provides the baseline against which successful action to curb illegal fishing can be judged
An ultrahot Neptune in the Neptune desert
About one out of 200 Sun-like stars has a planet with an orbital period
shorter than one day: an ultra-short-period planet (Sanchis-ojeda et al. 2014;
Winn et al. 2018). All of the previously known ultra-short-period planets are
either hot Jupiters, with sizes above 10 Earth radii (Re), or apparently rocky
planets smaller than 2 Re. Such lack of planets of intermediate size (the "hot
Neptune desert") has been interpreted as the inability of low-mass planets to
retain any hydrogen/helium (H/He) envelope in the face of strong stellar
irradiation. Here, we report the discovery of an ultra-short-period planet with
a radius of 4.6 Re and a mass of 29 Me, firmly in the hot Neptune desert. Data
from the Transiting Exoplanet Survey Satellite (Ricker et al. 2015) revealed
transits of the bright Sun-like star \starname\, every 0.79 days. The planet's
mean density is similar to that of Neptune, and according to thermal evolution
models, it has a H/He-rich envelope constituting 9.0^(+2.7)_(-2.9)% of the
total mass. With an equilibrium temperature around 2000 K, it is unclear how
this "ultra-hot Neptune" managed to retain such an envelope. Follow-up
observations of the planet's atmosphere to better understand its origin and
physical nature will be facilitated by the star's brightness (Vmag=9.8)
TOI-132 b: A short-period planet in the Neptune desert transiting a V=11.3 G-type star
The Neptune desert is a feature seen in the radius-period plane, whereby a notable dearth of short period, Neptune-like planets is found. Here, we report the Transiting Exoplanet Survey Satellite (TESS) discovery of a new short-period planet in the Neptune desert, orbiting the G-type dwarf TYC 8003-1117-1 (TOI-132). TESS photometry shows transit-like dips at the level of similar to 1400 ppm occurring every similar to 2.11 d. High-precision radial velocity follow-up with High Accuracy Radial Velocity Planet Searcher confirmed the planetary nature of the transit signal and provided a semi-amplitude radial velocity variation of 11.38(-0.85)(+0.84) m s(-1), which, when combined with the stellar mass of 0.97 +/- 0.06 M-circle dot, provides a planetary mass of 22.40(-1.92)(+1.90) M-circle plus. Modelling the TESS light curve returns a planet radius of 3.42(-0.14)(+0.13) R-circle plus , and therefore the planet bulk density is found to be 3.08(-0.46)(+0.44) g cm(-3). Planet structure models suggest that the bulk of the planet mass is in the form of a rocky core, with an atmospheric mass fraction of 4.3(-2.3)(+1.2) percent. TOI-132 b is a TESS Level 1 Science Requirement candidate, and therefore priority follow-up will allow the search for additional planets in the system, whilst helping to constrain low-mass planet formation and evolution models, particularly valuable for better understanding of the Neptune desert
High fatigue scores in patients with idiopathic inflammatory myopathies: a multigroup comparative study from the COVAD e-survey
Idiopathic inflammatory myopathies (IIMs) confer a significant risk of disability and poor quality of life, though fatigue, an important contributing factor, remains under-reported in these individuals. We aimed to compare and analyze differences in visual analog scale (VAS) scores (0–10 cm) for fatigue (VAS-F) in patients with IIMs, non-IIM systemic autoimmune diseases (SAIDs), and healthy controls (HCs). We performed a cross-sectional analysis of the data from the COVID-19 Vaccination in Autoimmune Diseases (COVAD) international patient self-reported e-survey. The COVAD survey was circulated from December 2020 to August 2021, and details including demographics, COVID-19 history, vaccination details, SAID details, global health, and functional status were collected from adult patients having received at least one COVID-19 vaccine dose. Fatigue experienced 1 week prior to survey completion was assessed using a single-item 10 cm VAS. Determinants of fatigue were analyzed in regression models. Six thousand nine hundred and eighty-eight respondents (mean age 43.8 years, 72% female; 55% White) were included in the analysis. The overall VAS-F score was 3 (IQR 1–6). Patients with IIMs had similar fatigue scores (5, IQR 3–7) to non-IIM SAIDs [5 (IQR 2–7)], but higher compared to HCs (2, IQR 1–5; P < 0.001), regardless of disease activity. In adjusted analysis, higher VAS-F scores were seen in females (reference female; coefficient −0.17; 95%CI −0.21 to −13; P < 0.001) and Caucasians (reference Caucasians; coefficient −0.22; 95%CI −0.30 to −0.14; P < 0.001 for Asians and coefficient −0.08; 95%CI −0.13 to 0.30; P = 0.003 for Hispanics) in our cohort. Our study found that patients with IIMs exhibit considerable fatigue, similar to other SAIDs and higher than healthy individuals. Women and Caucasians experience greater fatigue scores, allowing identification of stratified groups for optimized multidisciplinary care and improve outcomes such as quality of life
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