A longitudinal study of perceived social position and health-related quality of life.

Background: A large body of evidence suggests that there is a social gradient in the association between perceived social position and various health outcomes. Yet only a fraction of this research uses longitudinal data, and these studies usually rely on two data points in time, consider a single health outcome measure, overlook non-linear effects of perceived social position, and come almost exclusively from the Western welfare democracies.

Methods: Using data for 1921 individuals from three waves (2008, 2013, 2018) of the Polish Panel Survey (POLPAN), we fit between- and within-individuals hybrid-effects models with cluster-robust standard errors to investigate the association between one's perceived social position (self-placement on a socioeconomic hierarchy scale varying 1 to 10) and subsequent health-related quality of life (HRQoL) measured using the Nottingham Health Profile (NHP) and its six components.

Subjective Well-Being of Primary and Secondary School Students During the COVID-19 Pandemic: A Latent Profile Analysis.

Unlabelled: This study employs a person-oriented approach to examine the heterogeneity of samples of primary school students ( = 2,333; 56.5% girls) and secondary school students ( = 2,329; 62.9% girls) in terms of levels of subjective well-being (SWB) in five domains: family, friends, school experience, body, and the local area.

BMI and dissatisfaction with life: contextual factors and socioemotional costs of obesity.

Purpose: In this study, we investigate whether individuals' BMI categories are associated with being dissatisfied with one's life, how this association is affected by the social comparison that individuals make, and what the role of the overall BMI levels in this process is.

Methods: We use data for 21,577 men and 27,415 women, collected in 2016 by the European Bank for Reconstruction and Development, from 34 countries in Europe, the Middle East, and Central Asia. To understand the moderating effect of contextual environment, we use multilevel mixed effect logistic regression models and data for national, regional, and cohort-specific BMI levels.

What makes life enjoyable at an older age? Experiential wellbeing, daily activities, and satisfaction with life in general.

Objectives: This study uses a broad range of activities to examine how the type of activity, its social context, associated stress, importance, and the level of effort required are linked with activity enjoyment. Using aggregated data from all activities, it analyses the association between the experiential wellbeing of individuals and their satisfaction with life in general.

Method: The data set included 1809 activities, reported by 200 non-institutionalised adults, aged 65 and above, living in Poland.

How do perceived changes in inequality affect health?

Individuals do not possess an entirely accurate assessment of the level of income differences in their society and so changes in quantitative measures of income inequality may not always align with changes in the perceptions of income inequality. This disconnect is partly driven by how people form their opinions about the level of inequality. In this study we explore whether there is an association between perceptions of inequality and health, and if so, how it differs depending on the specific channel through which people formed their opinions about changes in income inequality.

Compared with whom? Reference groups in socio-economic comparisons and self-reported health in 34 countries.

Background: The association between socio-economic position and health is believed to be mediated, in part, by psycho-social comparison of one's situation with that of others. But with whom? Possibilities include family, friends, elites, or even those in other countries or in previous times. So far, there has been almost no research on whether the reference point matters.

Parental education, health literacy and children's adult body height.

Human anthropometric traits, while significantly determined by genetic factors, are also affected by an individual's early life environment. An adult's body height is a valid indicator of their living conditions in childhood. Parental education has been shown to be one of the key covariates of individuals' health and height, both in childhood and adulthood.

Inequality, validity of self-reported height, and its implications for BMI estimates: An analysis of randomly selected primary sampling units' data.

Any systematic errors in self-reported height, a measure commonly used in health research, may produce biased BMI estimates and reduce the effectiveness of public health interventions. To our knowledge, none of the studies evaluating the validity of self-reported height explore this issue in cross-national settings. This study analyses data on a sub-set of 750 individuals with information on self-reported and measured height from the Life in Transition Survey (LITS) conducted in 34 European and Central Asian countries in 2016.

Class and eating: Family meals in Britain.

This paper examines social differentiation in eating patterns in Britain. It focuses on family meals among individuals with under-age children. Eating with family members has been associated with improvement in wellbeing, nutritional status, and school performance of the children.

Quantification of optical turbulence in the ocean and its effects on beam propagation.

The influence of optically active turbulence on the propagation of laser beams is investigated in clear ocean water over a path length of 8.75 m. The measurement apparatus is described and the effects of optical turbulence on the laser beam are presented.

Impacts of underwater turbulence on acoustical and optical signals and their linkage.

Acoustical and optical signal transmission underwater is of vital interest for both civilian and military applications. The range and signal to noise during the transmission, as a function of system and water optical properties, in terms of absorption and scattering, determines the effectiveness of deployed electro-optical (EO) technology. The impacts from turbulence have been demonstrated to affect system performance comparable to those from particles by recent studies.

Optical turbulence on underwater image degradation in natural environments.

It is a well-known fact that the major degradation source on electro-optical imaging underwater is from scattering by particles of various origins and sizes. Recent research indicates that, under certain conditions, the apparent degradation could also be caused by the variations of index of refraction associated with temperature and salinity microstructures in the ocean and lakes. The combined impact has been modeled previously through the simple underwater imaging model.

Bottom-up determination of air-sea momentum exchange under a major tropical cyclone.

As a result of increasing frequency and intensity of tropical cyclones, an accurate forecasting of cyclone evolution and ocean response is becoming even more important to reduce threats to lives and property in coastal regions. To improve predictions, accurate evaluation of the air-sea momentum exchange is required. Using current observations recorded during a major tropical cyclone, we have estimated this momentum transfer from the ocean side of the air-sea interface, and we discuss it in terms of the drag coefficient.

Extreme waves under Hurricane Ivan.

Hurricane Ivan, a category 4 storm, passed directly over six wave-tide gauges deployed by the Naval Research Laboratory on the outer continental shelf in the northeastern Gulf of Mexico. Waves were observed with significant wave heights reaching 17.9 meters and maximum crest-to-trough individual wave heights of 27.