| 1. |
- Ademuyiwa, Adesoji O., et al.
(författare)
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Determinants of morbidity and mortality following emergency abdominal surgery in children in low-income and middle-income countries
- 2016
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Ingår i: BMJ Global Health. - : BMJ Publishing Group Ltd. - 2059-7908. ; 1:4
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Tidskriftsartikel (refereegranskat)abstract
- Background: Child health is a key priority on the global health agenda, yet the provision of essential and emergency surgery in children is patchy in resource-poor regions. This study was aimed to determine the mortality risk for emergency abdominal paediatric surgery in low-income countries globally.Methods: Multicentre, international, prospective, cohort study. Self-selected surgical units performing emergency abdominal surgery submitted prespecified data for consecutive children aged <16 years during a 2-week period between July and December 2014. The United Nation's Human Development Index (HDI) was used to stratify countries. The main outcome measure was 30-day postoperative mortality, analysed by multilevel logistic regression.Results: This study included 1409 patients from 253 centres in 43 countries; 282 children were under 2 years of age. Among them, 265 (18.8%) were from low-HDI, 450 (31.9%) from middle-HDI and 694 (49.3%) from high-HDI countries. The most common operations performed were appendectomy, small bowel resection, pyloromyotomy and correction of intussusception. After adjustment for patient and hospital risk factors, child mortality at 30 days was significantly higher in low-HDI (adjusted OR 7.14 (95% CI 2.52 to 20.23), p<0.001) and middle-HDI (4.42 (1.44 to 13.56), p=0.009) countries compared with high-HDI countries, translating to 40 excess deaths per 1000 procedures performed.Conclusions: Adjusted mortality in children following emergency abdominal surgery may be as high as 7 times greater in low-HDI and middle-HDI countries compared with high-HDI countries. Effective provision of emergency essential surgery should be a key priority for global child health agendas.
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| 2. |
- Carleo, Ilaria, et al.
(författare)
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The Multiplanet System TOI-421*
- 2020
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Ingår i: Astronomical Journal. - : American Astronomical Society. - 1538-3881 .- 0004-6256. ; 160:3
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Tidskriftsartikel (refereegranskat)abstract
- We report the discovery of a warm Neptune and a hot sub-Neptune transiting TOI-421 (BD-14 1137, TIC 94986319), a bright (V = 9.9) G9 dwarf star in a visual binary system observed by the Transiting Exoplanet Survey Satellite (TESS) space mission in Sectors 5 and 6. We performed ground-based follow-up observations-comprised of Las Cumbres Observatory Global Telescope transit photometry, NIRC2 adaptive optics imaging, and FIbre-fed Echelle Spectrograph, CORALIE, High Accuracy Radial velocity Planet Searcher, High Resolution echelle Spectrometer, and Planet Finder Spectrograph high-precision Doppler measurements-and confirmed the planetary nature of the 16 day transiting candidate announced by the TESS team. We discovered an additional radial velocity signal with a period of five days induced by the presence of a second planet in the system, which we also found to transit its host star. We found that the inner mini-Neptune, TOI-421 b, has an orbital period of P-b = 5.19672 +/- 0.00049 days, a mass of M-b = 7.17 +/- 0.66 M-circle plus, and a radius of R-b = R-circle plus, whereas the outer warm Neptune, TOI-421 c, has a period of P-c = 16.06819 +/- 0.00035 days, a mass of M-c = 16.42(-1.04)(+1.06)M(circle plus), a radius of R-c = 5.09(-0.15)(+0.16)R(circle plus), and a density of rho(c) = 0.685(-0.072)(+0.080) cm(-3). With its characteristics, the outer planet (rho(c) = 0.685(-0.0072)(+0.080) cm(-3)) is placed in the intriguing class of the super-puffy mini-Neptunes. TOI-421 b and TOI-421 c are found to be well-suited for atmospheric characterization. Our atmospheric simulations predict significant Ly alpha transit absorption, due to strong hydrogen escape in both planets, as well as the presence of detectable CH4 in the atmosphere of TOI-421 c if equilibrium chemistry is assumed.
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| 3. |
- Sodergren, Erica, et al.
(författare)
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The genome of the sea urchin Strongylocentrotus purpuratus.
- 2006
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 1095-9203 .- 0036-8075. ; 314:5801, s. 941-52
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Tidskriftsartikel (refereegranskat)abstract
- We report the sequence and analysis of the 814-megabase genome of the sea urchin Strongylocentrotus purpuratus, a model for developmental and systems biology. The sequencing strategy combined whole-genome shotgun and bacterial artificial chromosome (BAC) sequences. This use of BAC clones, aided by a pooling strategy, overcame difficulties associated with high heterozygosity of the genome. The genome encodes about 23,300 genes, including many previously thought to be vertebrate innovations or known only outside the deuterostomes. This echinoderm genome provides an evolutionary outgroup for the chordates and yields insights into the evolution of deuterostomes.
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| 4. |
- Crossfield, Ian J. M., et al.
(författare)
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197 CANDIDATES AND 104 VALIDATED PLANETS IN K2's FIRST FIVE FIELDS
- 2016
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Ingår i: Astrophysical Journal Supplement Series. - : American Astronomical Society. - 0067-0049 .- 1538-4365. ; 226:1
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Tidskriftsartikel (refereegranskat)abstract
- We present 197 planet candidates discovered using data from the first year of the NASA K2 mission (Campaigns 0-4), along with the results of an intensive program of photometric analyses, stellar spectroscopy, high-resolution imaging, and statistical validation. We distill these candidates into sets of 104 validated planets (57 in multi-planet systems), 30 false positives, and 63 remaining candidates. Our validated systems span a range of properties, with median values of R-P = 2.3 R-circle plus, P = 8.6 days, T-eff = 5300 K, and Kp = 12.7 mag. Stellar spectroscopy provides precise stellar and planetary parameters for most of these systems. We show that K2 has increased by 30% the number of small planets known to orbit moderately bright stars (1-4 R-circle plus, Kp = 9-13. mag). Of particular interest are 76 planets smaller than 2 R-circle plus, 15 orbiting stars brighter than Kp = 11.5. mag, 5 receiving Earth-like irradiation levels, and several multi-planet systems-including 4 planets orbiting the M dwarf K2-72 near mean-motion resonances. By quantifying the likelihood that each candidate is a planet we demonstrate that our candidate sample has an overall false positive rate of 15%-30%, with rates substantially lower for small candidates (<2 R-circle plus) and larger for candidates with radii >8 R-circle plus and/or with P < 3 days. Extrapolation of the current planetary yield suggests that K2 will discover between 500 and 1000 planets in its planned four-year mission, assuming sufficient follow-up resources are available. Efficient observing and analysis, together with an organized and coherent follow-up strategy, are essential for maximizing the efficacy of planet-validation efforts for K2, TESS, and future large-scale surveys.
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| 5. |
- Jiang, Heng, et al.
(författare)
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The effects of alcohol pricing policies on consumption, health, social and economic outcomes, and health inequality in Australia : a protocol of an epidemiological modelling study
- 2019
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Ingår i: BMJ Open. - : BMJ. - 2044-6055. ; 9:6
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Tidskriftsartikel (refereegranskat)abstract
- Introduction Alcohol use and misuse are associated with substantial health and social issues in Australia and internationally. Pricing policy is considered as one of the most effective means to reduce risky drinking and related harms. This protocol paper describes a study that will model and estimate the effects, effectiveness and cost-benefit of alcohol pricing policy initiatives in reducing risky drinking, health and social harms, and health inequalities among subpopulations in Australia.Methods and analysis The study is a modelling and epidemiological study using data from various resources, such as survey, previous literatures and response agencies. A number of statistical procedures will be undertaken to evaluate the impact of different alcohol pricing policy initiatives on various outcomes, including alcohol consumption in population subgroups, and health and social problems, and to measure health inequalities and cost-effectiveness of those proposed pricing policies, such as a 10% tax increase on all alcohol beverages or introduction of a minimum unit price.Ethics and dissemination The ethics approval of this study was obtained from the College Human Ethics Sub-Committee of the La Trobe University on 9 November 2017 (Ref: S17-206). While examining the heterogeneous effects of price policy across population subgroups, this study will provide the first comprehensive estimates of the likely impacts of alcohol price changes on health inequalities. The study will also provide sophisticated economic analyses of the impact of price policy changes, which is critical information for policy makers and will assist policy makers in directing resources to a more efficient alcohol strategy. Results will be made available to communities and societies, health departments and other researchers.
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| 6. |
- Korth, Judith, et al.
(författare)
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TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by Transit Timing Variations
- 2024
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Ingår i: Astrophysical Journal Letters. - 2041-8213 .- 2041-8205. ; 971:2
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Tidskriftsartikel (refereegranskat)abstract
- We report the discovery and characterization of a small planet, TOI-1408 c, on a 2.2 day orbit located interior to a previously known hot Jupiter, TOI-1408 b (P = 4.42 days, M = 1.86 ± 0.02 M Jup, R = 2.4 ± 0.5 R Jup) that exhibits grazing transits. The two planets are near 2:1 period commensurability, resulting in significant transit timing variations (TTVs) for both planets and transit duration variations for the inner planet. The TTV amplitude for TOI-1408 c is 15% of the planet’s orbital period, marking the largest TTV amplitude relative to the orbital period measured to date. Photodynamical modeling of ground-based radial velocity (RV) observations and transit light curves obtained with the Transiting Exoplanet Survey Satellite and ground-based facilities leads to an inner planet radius of 2.22 ± 0.06 R ⊕ and mass of 7.6 ± 0.2 M ⊕ that locates the planet into the sub-Neptune regime. The proximity to the 2:1 period commensurability leads to the libration of the resonant argument of the inner planet. The RV measurements support the existence of a third body with an orbital period of several thousand days. This discovery places the system among the rare systems featuring a hot Jupiter accompanied by an inner low-mass planet.
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| 7. |
- Savic, Michael, et al.
(författare)
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Defining drinking culture : A critical review of its meaning and connotation in social research on alcohol problems
- 2016
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Ingår i: Drugs. - : Informa UK Limited. - 0968-7637 .- 1465-3370. ; 23:4, s. 270-282
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Forskningsöversikt (refereegranskat)abstract
- There has been growing academic interest in drinking cultures as targets of investigation and intervention, driven often by policy discourse about changing the drinking culture. In this article, we conduct a critical review of the alcohol research literature to examine how the concept of drinking culture has been understood and employed, particularly in work that views alcohol through a problem lens. Much of the alcohol research discussion on drinking culture has focussed on national drinking cultures in which the cultural entity of concern is the nation or society as a whole (macro-level). In this respect, there has been a comparative tradition concerned with categorising drinking cultures into typologies (e.g. wet and dry cultures). Although overtly focused on patterns of drinking and problems at the macro-level, this tradition also points to a multifaceted understanding of drinking cultures. Even though norms about drinking are not uniform within and across countries there has been relatively less focus in the alcohol research literature on cultural entities below the level of the culture as a whole (micro-level). We conclude by offering a working definition, which underscores the multidimensional and interactive nature of the drinking culture concept.
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| 8. |
- Subjak, Jan, et al.
(författare)
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TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission
- 2020
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Ingår i: Astronomical Journal. - : American Astronomical Society. - 1538-3881 .- 0004-6256. ; 159:4
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Tidskriftsartikel (refereegranskat)abstract
- We report the discovery of an intermediate-mass transiting brown dwarf (BD), TOI-503b, from the TESS mission. TOI-503b is the first BD discovered by TESS, and it has circular orbit around a metallic-line A-type star with a period of P.=.3.6772.+/-.0.0001 days. The light curve from TESS indicates that TOI-503b transits its host star in a grazing manner, which limits the precision with which we measure the BD's radius ( = R 1.34+ R b 0.150.26 J). We obtained highresolution spectroscopic observations with the FIES, Ondr.ejov, PARAS, Tautenburg, and TRES spectrographs, and measured the mass of TOI-503b to be Mb.=.53.7.+/-.1.2 MJ. The host star has a mass of Ma.=.1.80.+/-.0.06Me, a radius of Ra.=.1.70.+/-.0.05Re, an effective temperature of Teff.=.7650.+/-.160 K, and a relatively high metallicity of 0.61.+/-.0.07 dex. We used stellar isochrones to derive the age of the system to be 180 Myr, which places its age between that of RIK 72b (a 10 Myr old BD in the Upper Scorpius stellar association) and AD 3116b (a 600 Myr old BD in the Praesepe cluster). Given the difficulty in measuring the tidal interactions between BDs and their host stars, we cannot precisely say whether this BD formed in situ or has had its orbit circularized by its host star over the relatively short age of the system. Instead, we offer an examination of plausible values for the tidal quality factor for the star and BD. TOI-503b joins a growing number of known short-period, intermediate-mass BDs orbiting mainsequence stars, and is the second such BD known to transit an A star, after HATS-70b. With the growth in the population in this regime, the driest region in the BD desert (35-55MJ sin i) is reforesting.
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| 9. |
- Alqasim, A., et al.
(författare)
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TOI−757 b: an eccentric transiting mini−Neptune on a 17.5−d orbit
- 2024
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Ingår i: Monthly Notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966. ; 533:1, s. 1-26
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Tidskriftsartikel (refereegranskat)abstract
- We report the spectroscopic confirmation and fundamental properties of TOI−757 b, a mini−Neptune on a 17.5−d orbit transiting a bright star (V = 9.7 mag) discovered by the TESS mission. We acquired high−precision radial velocity measurements with the HARPS, ESPRESSO, and PFS spectrographs to confirm the planet detection and determine its mass. We also acquired space−borne transit photometry with the CHEOPS space telescope to place stronger constraints on the planet radius, supported with ground−based LCOGT photometry. WASP and KELT photometry were used to help constrain the stellar rotation period. We also determined the fundamental parameters of the host star. We find that TOI−757 b has a radius of Rp = 2.5 ± 0.1R. and a mass of Mp = 10.5+−2212M, implying a bulk density of ρp = 3.6 ± 0.8 g cm−3. Our internal composition modelling was unable to constrain the composition of TOI−757 b, highlighting the importance of atmospheric observations for the system. We also find the planet to be highly eccentric with e = 0.39+−000708, making it one of the very few highly eccentric planets among precisely characterized mini−Neptunes. Based on comparisons to other similar eccentric systems, we find a likely scenario for TOI−757 b’s formation to be high eccentricity migration due to a distant outer companion. We additionally propose the possibility of a more intrinsic explanation for the high eccentricity due to star−star interactions during the earlier epoch of the Galactic disc formation, given the low metallicity and older age of TOI−757.
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| 10. |
- Atkinson, Jo-An, et al.
(författare)
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Harnessing advances in computer simulation to inform policy and planning to reduce alcohol-related harms
- 2018
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Ingår i: International Journal of Public Health. - : Springer Science and Business Media LLC. - 1661-8556 .- 1661-8564. ; 63:4, s. 537-546
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Tidskriftsartikel (refereegranskat)abstract
- Alcohol misuse is a complex systemic problem. The aim of this study was to explore the feasibility of using a transparent and participatory agent-based modelling approach to develop a robust decision support tool to test alcohol policy scenarios before they are implemented in the real world. A consortium of Australia's leading alcohol experts was engaged to collaboratively develop an agent-based model of alcohol consumption behaviour and related harms. As a case study, four policy scenarios were examined. A 19.5 +/- 2.5% reduction in acute alcohol-related harms was estimated with the implementation of a 3 a.m. licensed venue closing time plus 1 a.m. lockout; and a 9 +/- 2.6% reduction in incidence was estimated with expansion of treatment services to reach 20% of heavy drinkers. Combining the two scenarios produced a 33.3 +/- 2.7% reduction in the incidence of acute alcohol-related harms, suggesting a synergistic effect. This study demonstrates the feasibility of participatory development of a contextually relevant computer simulation model of alcohol-related harms and highlights the value of the approach in identifying potential policy responses that best leverage limited resources.
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| 11. |
- Babor, Thomas F., et al.
(författare)
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Alcohol : No Ordinary Commodity - a summary of the third edition
- 2022
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Ingår i: Addiction. - : NLM (Medline). - 0965-2140 .- 1360-0443. ; 117:12, s. 3024-3036
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Tidskriftsartikel (refereegranskat)abstract
- Background and Aims: This article summarizes the findings and conclusions of the third edition of Alcohol: No Ordinary Commodity. The latest revision of this book is part of a series of monographs designed to provide a critical review of the scientific evidence related to alcohol control policy from a public health perspective.Design: A narrative summary of the contents of the book according to five major issues.Findings: An extensive amount of epidemiological evidence shows that alcohol is a major contributor to the global burden of disease, disability and death in high-, middle- and low-income countries. Trends in alcohol products and marketing are described, indicating that a large part of the global industry has been consolidated into a small number of transnational corporations that are expanding their operations in Asia, Africa and Latin America. The main part of the book is devoted to a review of strategies and interventions designed to prevent or minimize alcohol-related harm. Overall, the most effective strategies to protect public health are taxation that decreases affordability and restrictions on the physical availability of alcohol. A total ban on alcohol marketing is also an effective strategy to reduce consumption. In addition, drink-driving counter-measures, brief interventions with at-risk drinkers and treatment of drinkers with alcohol dependence are effective in preventing harm in high-risk contexts and groups of hazardous drinkers.Conclusion: Alcohol policy is often the product of competing interests, values and ideologies, with the evidence suggesting that the conflicting interests between profit and health mean that working in partnership with the alcohol industry is likely to lead to ineffective policy. Opportunities for implementation of evidence-based alcohol policies that better serve the public good are clearer than ever before as a result of accumulating knowledge on which strategies work best.
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| 12. |
- Babor, Thomas F., et al.
(författare)
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Alcohol : No Ordinary Commodity - A Summary of the Third Edition
- 2023
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Ingår i: SUCHT. - 0939-5911 .- 1664-2856. ; 69:4, s. 147-162
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Tidskriftsartikel (refereegranskat)abstract
- Background and Aims: This article summarizes the findings and conclusions of the third edition of Alcohol: No Ordinary Commodity. The latest revision of this book is part of a series of monographs designed to provide a critical review of the scientific evidence related to alcohol control policy from a public health perspective. Design: A narrative summary of the contents of the book according to five major issues. Findings: An extensive amount of epidemiological evidence shows that alcohol is a major contributor to the global burden of disease, disability and death in high-, middle- and low-income countries. Trends in alcohol products and marketing are described, indicating that a large part of the global industry has been consolidated into a small number of transnational corporations that are expanding their operations in Asia, Africa and Latin America. The main part of the book is devoted to a review of strategies and interventions designed to prevent or minimize alcohol-related harm. Overall, the most effective strategies to protect public health are taxation that decreases affordability and restrictions on the physical availability of alcohol. A total ban on alcohol marketing is also an effective strategy to reduce consumption. In addition, drink-driving counter-measures, brief interventions with at-risk drinkers and treatment of drinkers with alcohol dependence are effective in preventing harm in high-risk contexts and groups of hazardous drinkers. Conclusion: Alcohol policy is often the product of competing interests, values and ideologies, with the evidence suggesting that the conflicting interests between profit and health mean that working in partnership with the alcohol industry is likely to lead to ineffective policy. Opportunities for implementation of evidence-based alcohol policies that better serve the public good are clearer than ever before as a result of accumulating knowledge on which strategies work best.
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| 13. |
- Callinan, Sarah, et al.
(författare)
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Age-based differences in quantity and frequency of consumption when screening for harmful alcohol use
- 2022
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Ingår i: Addiction. - : Wiley. - 0965-2140 .- 1360-0443. ; 117:9, s. 2431-2437
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Tidskriftsartikel (refereegranskat)abstract
- Background and aims: Survey questions on usual quantity and frequency of alcohol consumption are regularly used in screening tools to identify drinkers requiring intervention. The aim of this study was to measure age-based differences in quantity and frequency of alcohol consumption on the Alcohol Use Disorders Identification Test (AUDIT) and how this relates to the prediction of harmful or dependent drinking.Design: Cross-sectional survey.Setting: Australia.Participants: Data were taken from 17 399 respondents who reported any alcohol consumption in the last year and were aged 18 and over from the 2016 National Drug Strategy Household Survey, a broadly representative cross-sectional survey on substance use.Measurement: Respondents were asked about their frequency of consumption, usual quantity per occasion and the other items of the AUDIT.Findings: In older drinkers, quantity per occasion [β = 0.53, 95% confidence interval (CI) = 0.43, 0.64 in 43–47-year-olds as an example] was a stronger predictor of dependence than frequency per occasion (β = 0.24, 95% CI = 0.17, 0.31). In younger drinkers the reverse was true, with frequency a stronger predictor (β = 0.54, 95% CI = 0.39, 0.69 in 23–27-year-olds) than quantity (β = 0.26, 95% CI = 0.18, 0.34 in 23–27-year-olds). Frequency of consumption was not a significant predictor of dependence in respondents aged 73 years and over (β = −0.03, 95% CI = −0.08, 0.02). Similar patterns were found when predicting harmful drinking. Despite this, as frequency of consumption increased steadily with age, the question on frequency was responsible for at least 65% of AUDIT scores in drinkers aged 53 years and over.Conclusions: In younger drinkers, frequent drinking is more strongly linked to dependence and harmful drinking subscale scores on the Alcohol Use Disorders Identification Test (AUDIT) than quantity per occasion, yet quantity per occasion has a stronger influence on the overall AUDIT score in this group. In older drinkers, frequency of consumption is not always a significant predictor of the AUDIT dependence subscale and is a weak predictor of the harmful drinking subscale.
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| 14. |
- Callinan, Sarah, et al.
(författare)
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Changes in Australian attitudes to alcohol policy : 1995–2010
- 2014
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Ingår i: Drug and Alcohol Review. - : Wiley. - 0959-5236 .- 1465-3362. ; 33:3, s. 227-234
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Tidskriftsartikel (refereegranskat)abstract
- Introduction and AimsIn 2009 Wilkinson and colleagues reported a downward trend in support for alcohol policyrestrictions in Australia between 1995 and 2004. The aim of the current study is to examine more recent data on policy supportin Australia, specifically for policies covering alcohol availability up to 2010, and to examine specific demographic shifts insupport.Design and MethodsData was taken from the National Drug Strategy Household Surveys from 1995, 1998,2001, 2004, 2007 and 2010 (n = 80 846), primarily responses to attitude items on policy restriction and demographicquestions. The effects of age, sex, drinking patterns and income over time on three items addressing restriction of alcoholavailability were assessed using a factorial analysis of variance.ResultsAlthough availability items are among the lesspopular policy restrictions put forward in the National Drug Strategy Household Surveys, 2004 actually represented a turningpoint in the decrease in popularity, with an increase in support since then.Though some groups show consistently higher ratesof support than others for policy restrictions, the rate of change in support was fairly uniform across demographic and drinkinggroups.Discussion and ConclusionsDespite the lack of an obvious catalyst, there has been an increase in support foralcohol policy restriction as it relates to general availability and accessibility since 2004. Furthermore, this increase does notappear to be a reflection of a change in a specific group of people, but appears to be occurring across the Australian population.
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| 15. |
- Callinan, Sarah, et al.
(författare)
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Drinking Contexts and Alcohol Consumption : How Much Alcohol Is Consumed in Different Australian Locations?
- 2016
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Ingår i: Journal of Studies on Alcohol and Drugs. - : Alcohol Research Documentation, Inc.. - 1937-1888 .- 1938-4114. ; 77:4, s. 612-619
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Tidskriftsartikel (refereegranskat)abstract
- Objective: The aim of this study was to examine where Australians in different demographic groups and drinker categories consume their alcohol. Method: Results were taken from the Australian arm of the International Alcohol Control study, a telephone survey of 2,020 Australian adults with an oversample of risky drinkers. The 1,789 respondents who reported consuming alcohol in the past 6 months were asked detailed questions about the location of their alcohol consumption and how much alcohol they consumed at each place. Results: Sixty-three percent of all alcohol consumption reported by respondents was consumed in the drinker's own home, with much less consumed at pubs, bars, and nightclubs (12%). This is driven primarily by the number of people who drink in the home and the frequency of these events, with the amount consumed per occasion at home no more than in other people's homes or pubs, and significantly less than at special events. The average consumption on a usual occasion at each of these locations was more than five Australian standard drinks (above the Australian low-risk guideline for episodic drinking). Short-term risky drinkers had the highest proportion of consumption in pubs (19%), but they still consumed 41% of their units in their own home. Conclusions: The majority of alcohol consumed in Australia is consumed in the drinker's own home. Efforts to reduce long-term harms from drinking need to address off-premise drinking and, in particular, drinking in the home.
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| 16. |
- Callinan, Sarah, et al.
(författare)
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Heavy drinking occasions in Australia : Do context and beverage choice differ from low-risk drinking occasions?
- 2014
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Ingår i: Drug and Alcohol Review. - : Wiley. - 0959-5236 .- 1465-3362. ; 33:4, s. 354-357
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Tidskriftsartikel (refereegranskat)abstract
- Introduction and Aims. The aim of the current study is to look for differences in drink choice and drinking location between a recent heavy drinking occasion (RHDO) and usual low-risk occasions among those that recently had both types of drinking occasion. Design and Methods. Seven hundred and seventy-four respondents to a population-based survey reported having a RHDO [8 + Australian standard drinks (ASD) for females, 11 + ASD for males] in the past six months also reported that their usual drinking occasion in at least one location involved less than five ASD. Drink choice and drinking locations for the RHDO and usual low-risk occasions were compared using confidence intervals. Results. The RHDO was more likely than usual low-risk occasions to occur away from licensed premises (59%), despite a higher percentage of respondents reporting drinking at a pub, bar or nightclub on a RHDO (28%) than on a usual low-risk night (12%). A higher percentage of respondents nominated bottled spirits (33%) as their main drink for their RHDO, with 11% primarily drinking bottled spirits on a usual low-risk occasion; the converse was true for bottled wine (20% and 33%, respectively). Discussion and Conclusions. While the high proportion of RHDOs that occurred at least in part at pubs or nightclubs was not surprising, a high proportion also occur in private homes. Previously found links between heavy drinking and beer may be a reflection of the usual drink choice of heavier drinkers, rather a choice specific to a particularly heavy occasion.
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| 17. |
- Callinan, Sarah, et al.
(författare)
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How much alcohol is consumed outside of the lifetime risk guidelines in Australia?
- 2018
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Ingår i: Drug and Alcohol Review. - : Wiley. - 0959-5236 .- 1465-3362. ; 37:1, s. 42-47
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Tidskriftsartikel (refereegranskat)abstract
- Introduction and Aims. This study aims to estimate the prevalence of long-term risky drinking within the Australian population and the proportion of standard drinks that is consumed outside of the long-term risk (LTR) guidelines of two Australian standard drinks (ASD) per day.Design and Methods. Recruited by phone, 2020 Australian adults with an oversampling of risky drinkers were asked detailed questions about how much alcohol they consumed at a range of locations in 2013. Descriptive statistical analyses of data weighted to be representative of the Australian adult population were undertaken, with a focus on the ASD consumed above the LTR guidelines.Results. Although 28% of respondents drink at levels above the LTR drinking guidelines, 56% of all ASD consumed are above the two per day recommended to reduce LTR. Three-quarters of cask wine and liqueurs were consumed outside of the LTR guidelines, as were 58% of all ASD consumed in the home, similar to the proportion of ASD consumed above the guidelines in pubs (55%).Discussion and Conclusions. While the minority of Australians drink to LTR levels, the majority of alcohol is consumed by long-term risky drinkers. More research and policy focus on the patterns of alcohol consumption that lead to long-term risk, particularly outside of licensed premises, is required.
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| 18. |
- Callinan, Sarah, et al.
(författare)
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Purchasing, consumption, demographic and socioeconomic variables associated with shifts in alcohol consumption during the COVID-19 pandemic
- 2021
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Ingår i: Drug and Alcohol Review. - : Wiley. - 0959-5236 .- 1465-3362. ; 45, s. 24A-24A
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Tidskriftsartikel (refereegranskat)abstract
- Introduction and Aims: Restrictions introduced to reduce the spread of COVID-19 have had major impacts on the living circumstances of Australians. This paper aims to provide insight into shifts in alcohol consumption and associated factors during the epidemic. Design and Methods: A cross-sectional convenience sample of 2307 Australians aged 18 and over who drank at least monthly was recruited through social media. Respondents were asked about their alcohol consumption and purchasing in 2019 prior to the epidemic plus similar questions about their experiences in the month prior to being surveyed between 29 April and 16 May 2020. Results: Reports of average consumption before (3.53 drinks per day [3.36, 3.71 95% confidence interval]) and during (3.52 [3.34, 3.69]) the pandemic were stable. However, young men and those who drank more outside the home in 2019 reported decreased consumption during the pandemic, and people with high levels of stress and those who bulk-bought alcohol when restrictions were announced reported an increase in consumption relative to those who did not. Discussion and Conclusions: A reported increase in consumption among those experiencing more stress suggests that some people may have been drinking to cope during the epidemic. Conversely, the reported decrease in consumption among those who drank more outside of their home in 2019 suggests that closing all on-trade sales did not result in complete substitution of on-premise drinking with home drinking in this group. Monitoring of relevant subgroups to assess long-term changes in consumption in the aftermath of the epidemic is recommended.
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| 19. |
- Callinan, Sarah, et al.
(författare)
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Who Purchases Low-Cost Alcohol in Australia?
- 2015
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Ingår i: Alcohol and Alcoholism. - : Oxford University Press (OUP). - 0735-0414 .- 1464-3502. ; 50:6, s. 647-653
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Tidskriftsartikel (refereegranskat)abstract
- Debates surrounding potential price-based polices aimed at reducing alcohol-related harms tend to focus on the debate concerning who would be most affected-harmful or low-income drinkers. This study will investigate the characteristics of people who purchase low-cost alcohol using data from the Australian arm of the International Alcohol Control study. 1681 Australians aged 16 and over who had consumed alcohol and purchased it in off-licence premises were asked detailed questions about both practices. Low-cost alcohol was defined using cut-points of 80A cent, $1.00 or $1.25 per Australian standard drink. With a $1.00 cut-off low income (OR = 2.1) and heavy drinkers (OR = 1.7) were more likely to purchase any low-cost alcohol. Harmful drinkers purchased more, and low-income drinkers less, alcohol priced at less than $1.00 per drink than high income and moderate drinkers respectively. The relationship between the proportion of units purchased at low cost and both drinker category and income is less clear, with hazardous, but not harmful, drinkers purchasing a lower proportion of units at low cost than moderate drinkers. The impact of minimum pricing on low income and harmful drinkers will depend on whether the proportion or total quantity of all alcohol purchased at low cost is considered. Based on absolute units of alcohol, minimum unit pricing could be differentially effective for heavier drinkers compared to other drinkers, particularly for young males.
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| 20. |
- Diaz, Matias R., et al.
(författare)
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TOI-132 b: A short-period planet in the Neptune desert transiting a V=11.3 G-type star
- 2020
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 493:1, s. 973-985
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Tidskriftsartikel (refereegranskat)abstract
- 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.
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| 21. |
- Dietze, Paul, et al.
(författare)
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Correlates of alcohol consumption on heavy drinking occasions of young risky drinkers : event versus personal characteristics
- 2017
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Ingår i: Addiction. - : Wiley. - 0965-2140 .- 1360-0443. ; 112:8, s. 1369-1377
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Tidskriftsartikel (refereegranskat)abstract
- Aims Risky single-occasion drinking (RSOD) by young people is a serious public health issue, yet little is known about the specific circumstances of risky drinking occasions. This study examined the independent effects of event- and individual-specific variables on RSOD. Design Longitudinal cohort study measuring self-reported RSOD and event- and individual-specific variables across two drinking occasions approximately 1 year apart. Setting Metropolitan Melbourne, Australia. Participants A sample of 710 young risky drinkers aged between 18 and 25years and defined as engaging in risky drinking practices (males: consumed alcohol in excess of 10 Australian Standard Drinks (ASD: 10g ethanol) in a single occasion in the previous year; females: consumed alcohol in excess of seven ASD for females in a single occasion in the previous year). Measurements Random digit-dial telephone landline survey of the most recent heavy drinking occasion and socio-demographic variables. The primary outcome was the log of the total drinks consumed in the most recent heavy drinking occasion. Event-specific (e.g. number of drinking locations) and time-varying (e.g. weekly income) and time-invariant (e.g. sex) individual-specific variables were examined as correlates of total drinks consumed. Findings Changes in event-specific characteristics including the length of the drinking occasion (Likelihood Ratio (2)(2)=24.4, P<0.001), the number of drinking locations (Wald (2)((1))=7.6, P=0.006) and the number of different drink types (Wald (2)((1))=13.6, P<0.001) were associated with increases in total drinks consumed, after adjustment for time-invariant and time-variant individual-specific variables such as gender, income level and weekly consumption. Few other effects were noted. Conclusions Event-specific characteristics are important predictors of the number of drinks consumed during risky single occasion drinking (RSOD) and illustrate the importance of event contexts when considering interventions targeting RSOD. The total number of drinks consumed in a RSOD session appears to rise independently with the duration of the drinking event, the number of drinking locations and the number of different types of beverage consumed.
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| 22. |
- Fridlund, Malcolm, 1952, et al.
(författare)
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Planets observed with CHEOPS: Two super-Earths orbiting the red dwarf star TOI-776
- 2024
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Ingår i: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 684
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Tidskriftsartikel (refereegranskat)abstract
- Context. M-dwarf stars are the most common of potential exoplanet host stars in the Galaxy. It is therefore very important to understand planetary systems orbiting such stars and to determine the physical parameters of such planets with high precision. Also with the launch of the James Webb Space Telescope (JWST) the observation of atmospheric parameters of planets orbiting these stars has begun. It is therefore required to determine properties of potential targets. Aims. Two planets around the red dwarf TOI-776 were detected by TESS. The objective of our study was to use transit observations obtained by the CHEOPS space mission to improve the current precision of the planetary radii, as well as additional radial velocity (RV) data in order to improve mass estimates of the two planets. Using these quantities, we wanted to derive the bulk densities of those planets, improving the precision in earlier results, and use this information to put them in context of other exoplanetary systems involving very low mass stars. Methods. Utilizing new transit data from the CHEOPS satellite and its photometric telescope, we obtained very high precision planetary transit measurements. Interpretation of these provides updated planetary radii, along with other system parameters. A concurrent ESO large observing program using the high precision spectrograph HARPS has doubled the available radial velocity data. Calculating the power spectrum of a number of stellar activity indices we update the previously estimated stellar rotation period to a lower value. Results. The CHEOPS data provide precise transit depths of 909 and 1177 ppm translating into radii of Rb = 1.798-0.077+0.078 R⊕ and Rc = 2.047-0.078+0.081 R⊕, respectively. Our interpretation of the radial velocities and activity indicator time series data estimates a stellar rotation period for this early M dwarf of ~21.1 days. A further multi-dimensional Gaussian process approach confirm this new estimate. By performing a Skew-Normal (SN) fit onto the Cross Correlation Functions we extracted the RV data and the activity indicators to estimate the planetary masses, obtaining Mb = 5.0-1.6+1.6 M⊕ and Mc = 6.9-2.5+2.6 M⊕. Conclusions. We improve the precision in planetary radius for TOI-776 b and c by a factor of more than two. Our data and modelling give us parameters of both bodies consistent with mini-Neptunes, albeit with a relatively high density. The stellar activity of TOI-776 is found to have increased by a factor larger than 2 since the last set of observations.
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| 23. |
- Gandolfi, D., et al.
(författare)
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The Transiting Multi-planet System HD15337: Two Nearly Equal-mass Planets Straddling the Radius Gap
- 2019
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Ingår i: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8213 .- 2041-8205. ; 876:2
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Tidskriftsartikel (refereegranskat)abstract
- We report the discovery of a super-Earth and a sub-Neptune transiting the star HD 15337 (TOI-402, TIC 120896927), a bright (V = 9) K1 dwarf observed by the Transiting Exoplanet Survey Satellite (TESS) in Sectors 3 and 4. We combine the TESS photometry with archival High Accuracy Radial velocity Planet Searcher spectra to confirm the planetary nature of the transit signals and derive the masses of the two transiting planets. With an orbital period of 4.8 days, a mass of {7.51}-1.01+1.09 {M}\oplus and a radius of 1.64 ± 0.06 R ⊕, HD 15337 b joins the growing group of short-period super-Earths known to have a rocky terrestrial composition. The sub-Neptune HD 15337 c has an orbital period of 17.2 days, a mass of {8.11}-1.69+1.82 {{{M}}}\oplus , and a radius of 2.39 ± 0.12 R ⊕, suggesting that the planet might be surrounded by a thick atmospheric envelope. The two planets have similar masses and lie on opposite sides of the radius gap, and are thus an excellent testbed for planet formation and evolution theories. Assuming that HD 15337 c hosts a hydrogen-dominated envelope, we employ a recently developed planet atmospheric evolution algorithm in a Bayesian framework to estimate the history of the high-energy (extreme ultraviolet and X-ray) emission of the host star. We find that at an age of 150 Myr, the star possessed on average between 3.7 and 127 times the high-energy luminosity of the current Sun.
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| 24. |
- Harakawa, Hiroki, et al.
(författare)
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A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 508
- 2022
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Ingår i: Publications of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 0004-6264 .- 2053-051X. ; 74:4, s. 904-922
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Tidskriftsartikel (refereegranskat)abstract
- We report the near-infrared radial velocity (RV) discovery of a super-Earth planet on a 10.77 d orbit around the M4.5 dwarf Ross 508 (Jmag = 9.1). Using precision RVs from the Subaru Telescope IRD (InfraRed Doppler) instrument, we derive a semi-amplitude of 3.92ms−1, corresponding to a planet with a minimum mass msini=4.00M⊕. We find no evidence of significant signals at the detected period in spectroscopic stellar activity indicators or MEarth photometry. The planet, Ross 508 b, has a semi-major axis of 0.05366au. This gives an orbit-averaged insolation of ≈1.4 times the Earth’s value, placing Ross 508 b near the inner edge of its star’s habitable zone. We have explored the possibility that the planet has a high eccentricity and its host is accompanied by an additional unconfirmed companion on a wide orbit. Our discovery demonstrates that the near-infrared RV search can play a crucial role in finding a low-mass planet around cool M dwarfs like Ross 508.
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| 25. |
- Hirano, Teruyuki, et al.
(författare)
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Exoplanets around Low-mass Stars Unveiled by K2
- 2018
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Ingår i: Astronomical Journal. - : American Astronomical Society. - 1538-3881 .- 0004-6256. ; 155:3, s. 127-
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Tidskriftsartikel (refereegranskat)abstract
- We present the detection and follow-up observations of planetary candidates around low-mass stars observed by the K2 mission. Based on light-curve analysis, adaptive-optics imaging, and optical spectroscopy at low and high resolution (including radial velocity measurements), we validate 16 planets around 12 low-mass stars observed during K2 campaigns 5–10. Among the 16 planets, 12 are newly validated, with orbital periods ranging from 0.96 to 33 days. For one of the planets (K2-151b), we present ground-based transit photometry, allowing us to refine the ephemerides. Combining our K2 M-dwarf planets together with the validated or confirmed planets found previously, we investigate the dependence of planet radius R p on stellar insolation and metallicity [Fe/H]. We confirm that for periods P ≲ 2 days, planets with a radius Rp≳ 2 R⊕ are less common than planets with a radius between 1–2 R⊕. We also see a hint of the “radius valley” between 1.5 and 2 R⊕, which has been seen for close-in planets around FGK stars. These features in the radius/period distribution could be attributed to photoevaporation of planetary envelopes by high-energy photons from the host star, as they have for FGK stars. For the M dwarfs, though, the features are not as well defined, and we cannot rule out other explanations such as atmospheric loss from internal planetary heat sources or truncation of the protoplanetary disk. There also appears to be a relation between planet size and metallicity: the few planets larger than about 3 R⊕ are found around the most metal-rich M dwarfs.
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