Are all net generation students the same? The frequency of technology use at university

This paper looks at the results of a longitudinal study on how frequently the Net Generation students (i.e. those born in the 1980s) use technologies in their first year of university. Eight technology groupings were explored including web 2.0, social networking and computer software. The research investigated whether older Net Generation students (21-25 years) used technologies differently to the younger Net Generation students (≤20 years). Additional factors such as gender, university type (distance-learning or place-based) and nationality (UK or International) were accounted for during the study. The research found that nationality and university type were influential factors in determining the frequency of use across all technologies at the beginning of the academic year and continued to be influencing factors along with gender at the end of the academic year. Age only seemed to be an important factor for the use of Web 2.0 and social networking sites but these uses of technology were also dependent on students’ university type, gender and nationality. Thus these demographic and social factors have to be considered when analysing technology use or designing educational tools. The findings of this study have implications for research into age-related differences in students’ use of digital technologies and universities’ digital technologies training provision

Влияние величины напряжения питания на потери в асинхронных электродвигателях

Рассматривается работа асинхронного двигателя при изменении напряжения питания. Приводятся алгоритм и результаты расчета зависимостей изменения потерь активной мощности от напряжения питания для ряда асинхронных двигателей. Дана оценка величины изменения потерь для электродвигателей различных типоразмеров

Vitamin D Status in Central Europe

Little published information is available regarding epidemiological data on vitamin D status in the large geographical region of Central Europe (CE). We searched the journal literature with regard to 25(OH)D concentrations among community-dwelling or healthy people living in CE. 25(OH)D concentrations varied by age, season, study sample size, and methodological approach [i.e., 25(OH)D assay used]. Concentrations of 25(OH)D in CE appeared lower than 30 ng/mL, and the magnitude of hypovitaminosis D was similar to that reported in Western Europe. While most of the studies reviewed were cross-sectional studies, a longitudinal study was also included to obtain information on seasonal variability. The longitudinal study reported wintertime 25(OH)D values close to 21-23 ng/mL for all studied age groups, with a significant increase of 25(OH)D in August reaching 42 ng/mL for those aged 0-9 years, but only 21 ng/mL for the elderly aged 80-89 years. The decrease in 25(OH)D with respect to age was attributed to decreased time spent in the sun and decreased vitamin D production efficiency. Based on the literature review on vitamin D status in the CE populations, it can be concluded that 25(OH)vitamin D levels are on average below the 30 ng/mL level

Epidemiology of hip fracture in Belarus: development of a country-specific FRAX model and its comparison to neighboring country models

Summary Fracture probabilities resulting from the newly generated FRAX model for Belarus based on regional estimates of the hip fracture incidence were compared with FRAX models of neighboring countries. Differences between the country-specific FRAX patterns and the rank orders of fracture probabilities were modest. Objective This paper describes the epidemiology of hip fractures in Belarus that was used to develop the country-specific fracture prediction FRAX® tool and illustrates its features compared to models for the neighboring countries of Poland, Russia, and Lithuania. Methods We carried out a population-based study in a region of Belarus (the city of Mozyr) representing approximately 1.2% of the country’s population. We aimed to identify all hip fractures in 2011–2012 from hospital registers and primary care sources. Age- and sex-specific incidence and national mortality rates were incorporated into a FRAX model for Belarus. Fracture probabilities were compared with those derived from FRAX models in neighboring countries. Results The estimated number of hip fractures nationwide in persons over the age of 50 years for 2015 was 8250 in 2015 and is predicted to increase to 12,918 in 2050. The annual incidence of fragility hip fractures in individuals aged 50 years or more was 24.6/10,000 for women and 14.6/10,000 for men, standardized to the world population. The comparison with FRAX models in neighboring countries showed that hip fracture probabilities in men and women in Belarus were similar to those in Poland, Russia, and Lithuania. The difference in incidence rates between the surveys including or excluding data from primary care suggested that 29.1% of patients sustaining a hip fracture were not hospitalized and, therefore, did not receive specialized medical care. Conclusion A substantial proportion of hip fractures in Belarus does not come to hospital attention. The FRAX model should enhance accuracy of determining fracture probability among the Belarus population and help guide decisions about treatment

Влияние величины напряжения питания на потери в асинхронных электродвигателях

Рассматривается работа асинхронного двигателя при изменении напряжения питания. Приводятся алгоритм и результаты расчета зависимостей изменения потерь активной мощности от напряжения питания для ряда асинхронных двигателей. Дана оценка величины изменения потерь для электродвигателей различных типоразмеров