1,027 research outputs found
Smart technologies: useful tools to assess the exposure to solar ultraviolet radiation for general population and outdoor workers
Beside some documented benefits attributed to ultraviolet solar radiation (solar UVR), a lot of adverse effects are a consequence of a chronic exposure, including the occurrence of photo-induced skin cancer. Improvement in risks perception, due to UVR overexposure, in the case of occupational or recreational exposure, is of great importance for public health. The amount of exposure to UVR has to be assessed as accurately as possible, with the aim to characterize different exposure conditions and, by their appropriate management, to prevent adverse health effects attributed to prolonged exposure to solar radiation (SR). The available technology allows to acquire such information, either using miniaturized and wearable sensors, or through devices who exploit radiative transfer models by integrating satellite-based radiometric data with meteorological data. We proceeded to an intercomparison to evaluate the performance of different devices in three commonly exposure conditions. Applications using satellite data, developed for preventing sunburn during recreational exposure, are adeguate for that purpose, while for a more accurate exposure assessment, only those which evaluate the irradiance in near real-time provide acceptable results. Unlike earlier, the low-cost devices that use wearable sensors showed inadequate performance for our purpose
Parental Time Investments in Children: The Role of Competition for University Places in the UK
We use novel diary surveys coupled with universities' administrative student data for the last three decades to document that increased competition for university places at elite institutions in the United Kingdom contributes to explain growing gaps in time investments between college and non-college educated parents. Competition for university places in the UK grew significantly during the 1980s and early 1990s, and gradually diminished afterwards. We find that the gap in time investments by college and non-college educated parents and their children widened up precisely during this first period, especially in terms of human capital enhancing activities
Consumer attitudes and preference exploration towards fresh-cut salads using best–worst scaling and latent class analysis
This research explored the preferences and buying habits of a sample of 620 consumers of fresh-cut, ready-to-eat salads. A best–worst scaling approach was used to measure the level of preference stated by individuals regarding 12 attributes for quality (intrinsic, extrinsic and credence) of fresh-cut salads. The experiment was carried out through direct interviews at several large-scale retail outlets in the Turin metropolitan area (north-west of Italy). Out of the total number of questioned consumers, 35% said they did not consume fresh-cut salads. On the contrary, the rest of the involved sample expressed the highest degree of preference towards the freshness/appearance attribute, followed by the expiration date and the brand. On the contrary, attributes such as price, organic certification and food safety did not emerge as discriminating factors in consumer choices. Additionally, five clusters of consumers were identified, whose preferences are related both to purchasing styles and socio-demographic variables. In conclusion, this research has highlighted the positive attitude of consumers towards quality products backed by a brand, providing ideas for companies to improve within this sector and implement strategies to answer the needs of a new segment of consumers, by determining market opportunities that aim to strengthen local brands
Birth Timing and Neonatal Health.
We take advantage of a new natural experiment to evaluate the health effects of scheduling birth early for non-medical reasons on infant health. In 2010, the cancellation of a generous child benefit in Spain led may families to schedule birth early in order to remain eligible for the subsidy. We document that the affected cohort of children did not suffer any increase in birth complications or medical conditions right at birth, but were significantly more likely to be admitted to hospital during their second and third weeks of life, suggesting potentially persistent negative health effect
Marriage and housework
This article provides insights into the gains of forming a couple by estimating how much of the difference in housework between single and married individuals is causal and how much is due to selection. Time-varying observed variables and time-invariant heterogeneity explains about half of the observed differences in housework documented in the cross-sectional data. There remains a genuine one-and-a-half-hour increase per week in housework time for each partner, with women specializing in routine and men in non-routine housework tasks
The effect of breastfeeding on children's cognitive and noncognitive development
This paper uses propensity score matching methods to investigate the relationship between breastfeeding and children's cognitive and noncognitive development. We find that breastfeeding for four weeks is positively and statistically significantly associated with higher cognitive test scores, by around one tenth of a standard deviation. The association between breastfeeding and noncognitive development is weaker, and is restricted to children of less educated mothers. We conclude that interventions which increase breastfeeding rates would improve not only children's health, but also their cognitive skills, and possibly also their noncognitive development
Marriage and Housework
This paper provides insights into the welfare gains of forming a couple by estimating how much of the difference in housework time between single and married individuals is causal and how much is due to selection. Using longitudinal data from Australia, UK and US, we find that selection into marriage by individuals with a higher taste for home-produced goods can explain about half of the observed differences in housework documented in the cross-sectional data. There remains a genuine two-hour increase in housework time for each partner upon marriage, with women specializing in routine, and men specializing in non-routine housework tasks
Effective models and predictability of chaotic multiscale systems via machine learning
Understanding and modeling the dynamics of multiscale systems is a problem of considerable interest both for theory and applications. For unavoidable practical reasons, in multiscale systems, there is the need to eliminate from the description the fast and small-scale degrees of freedom and thus build effective models for only the slow and large-scale degrees of freedom. When there is a wide scale separation between the degrees of freedom, asymptotic techniques, such as the adiabatic approximation, can be used for devising such effective models, while away from this limit there exist no systematic techniques. Here, we scrutinize the use of machine learning, based on reservoir computing, to build data-driven effective models of multiscale chaotic systems. We show that, for a wide scale separation, machine learning generates effective models akin to those obtained using multiscale asymptotic techniques and, remarkably, remains effective in predictability also when the scale separation is reduced. We also show that predictability can be improved by hybridizing the reservoir with an imperfect model
The Impact of Eliminating a Child Benefit on Birth Timing and Infant Health
We study the effects of the cancellation of a sizeable child benefit in Spain on birth timing and neonatal health. In May 2010, the government announced that a 2,500-euro universal "baby bonus" would stop being paid to babies born on or after January 1st, 2011. We use detailed micro data from birth certificates from 2000 to 2011, and find that more than 2,000 families were able to anticipate the date of birth of their babies from (early) January 2011 to (late) December 2010 (for a total of about 9,000 births a week nationally). This shifting of deliveries led to a significant increase in the number of low birth weight babies, as well as a peak in neonatal mortality. These results suggest that announcement effects are important in shaping economic decisions and outcomes. They also provide new, credible evidence highlighting the negative health consequences of scheduling births for non-medical reasons
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