Distance to old parents

In the present study, features of and trends in child-parent proximity in Sweden are analyzed using comprehensive register data. The results show that 85% of older parents have adult children within a radius of 50 km, of which 10% live ‘just around the corner’; corresponding figures for adult children are 72% and 5%, respectively. The study gives no indication of increasing intergenerational distances. Results from logistic regressions show that adult children who are well educated, female, older, born in Sweden, who are not parents, who live in densely populated areas, and have siblings are less likely to stay in the same region as their parents.adult children, aging, child-parent proximity, distance, intergenerational contacts, logistic regression analysis, old parents, register data, Sweden

USABILITY TESTING OF INTERACTIVE SYSTEMS CONDUCTED BY UNIVERSITY STUDENTS DURING A PANDEMIC

This case study describes a usability testing course in which students learn by practicing several evaluation methods. The on-campus format makes it possible for teachers and students to meet to discuss recorded test sessions and students can observe other students’ execution of pilot studies conducted on campus. The COVID-19 pandemic placed new demands on this course. In-person activities were avoided by some students and many test participants. Some student teams tried remote usability testing. Interestingly, screen recordings (with sound) of the test sessions show that remote testing sometimes helped the students focus more on observation and less on (inappropriately) guiding the test subjects. Another effect was that the students found it easier to recruit participants than during the previous years when the university was teeming with students, lecturers, and non-academic staff. However, the recruited participants were often notably limited to the students’ circles of friends

The Onsala Tide Gauge Station: Experiences from the first four years of operation

A tide gauge station was installed at the Onsala Space Observatory in 2015. The official tide gauge station includes several independent senors: one radar and three pneumatic sensors (also referred to as bubblers). The radar and two bubblers are mounted in a well and one bubbler outside the well. Additional sensors such as one laser sensor and three radar sensorshave been used during dierent time periods in order to further assess the quality of the acquired sea level data.Here we compare the four ocial sensors and the laser sensor which was installed in April 2016. The expected accuracy (one standard deviation) for all of these sensors is approximately 3 mm, according to the datasheet specifications. Results from the first four years of operations are used to assess and estimate the actual accuracies by means of comparisons between the sensors. We observe typical biases over time scales of months of up to 10 mm. Biases are caused by uncertainties ofthe reference level of the sensor, the density of the water for the bubblers, multipath eects for the radar, and nonlinearities with temperature for the laser. The observed monthly standard deviation between the sensors in the well vary between 2 mm and 6 mm, which is roughly consistent with the data sheet specifications

Профессиональный контекст содержания практико-ориентированных задач по химии в условиях профильного обучения

ОБРАЗОВАНИЕ МЕДИЦИНСКОЕОБРАЗОВАНИЕ МЕДИЦИНСКОЕ ПОДГОТОВИТЕЛЬНОЕДОВУЗОВСКАЯ ПОДГОТОВКАПРОФИЛЬНОЕ ОБУЧЕНИЕПРАКТИКО-ОРИЕНТИРОВАННЫЕ ЗАДАЧИПРАКТИКО-ОРИЕНТИРОВАННОЕ ОБУЧЕНИ

Potassium, chlorine, and sulfur in ash, particles, deposits, and corrosion during wood combustion in a circulating fluidized-bed boiler

The effect of the addition of chlorine and/or sulfur to the fuel on fly ash composition, deposit formation, and superheater corrosion has been studied during biomass combustion in a circulating fluidized-bed boiler. The chlorine (HCl (aq)) and sulfur (SO2 (g)) were added in proportions of relevance for the potassium chemistry. The composition of the bottom and the fly ashes was analyzed. Gas and particle measurements were performed downstream of the cyclone before the convection pass and the flue gas composition was recorded in the stack with a series of standard instruments and an FTIR analyzer. At the position downstream of the cyclone, a deposit probe was situated, simulating a superheater tube. Deposits on the probe and initial corrosion were examined. It is concluded that addition of sulfur and chlorine increases the formation of submicron particles leading to deposition of potassium sulfate and chloride. The results compare well with earlier work based on laboratory-scale experiments concerning effects of chlorine and sulfur on potassium chemistry

Onsala Space Observatory – IVS Technology Development Center Activities during 2017–2018

We give a brief overview of the technical development related to geodetic VLBI done during 2017 and 2018 at the Onsala Space Observatory

The Onsala Tide Gauge Station: Experiences from the first three years of operation

A tide gauge station was installed at the Onsala Space Observatory in 2015. The official tide gauge station includes several independent senors: one radar and three pneumatic sensors (also referred to as bubblers). The radar and two bubblers are mounted in a well and one bubbler outside the well. Additional sensors such as one laser sensor and three radar sensorshave been used during dierent time periods in order to further assess the quality of the acquired sea level data.Here we compare the four ocial sensors and the laser sensor which was installed in April 2016. The expected accuracy (one standard deviation) for all of these sensors is approximately 3 mm, according to the datasheet specifications. Results from the first four years of operations are used to assess and estimate the actual accuracies by means of comparisons between the sensors. We observe typical biases over time scales of months of up to 10 mm. Biases are caused by uncertainties ofthe reference level of the sensor, the density of the water for the bubblers, multipath eects for the radar, and nonlinearities with temperature for the laser. The observed monthly standard deviation between the sensors in the well vary between 2 mm and 6 mm, which is roughly consistent with the data sheet specifications

Status of the Onsala Twin Telescopes – Two Years After the Inauguration

We give a brief overview on the status of\ua0the Onsala twin telescopes (OTT), two years after their\ua0inauguration. The dierent components of the VGOS\ua0systems are briefly described, and the development towards\ua0routine operations

Status of the Onsala Twin Telescopes – One Year After the Inauguration

We briefly describe the status of the Onsala\ua0twin telescopes and the experience gained since the official\ua0inauguration in May 2017

Role of Tobacco Use in the Etiology of Acoustic Neuroma

Two previous studies suggest that cigarette smoking reduces acoustic neuroma risk; however, an association between use of snuff tobacco and acoustic neuroma has not been investigated previously. The authors conducted a case-control study in Sweden from 2002 to 2007, in which 451 cases and 710 population-based controls completed questionnaires. Cases and controls were matched on gender, region, and age within 5 years. The authors estimated odds ratios using conditional logistic regression analyses, adjusted for education and tobacco use (snuff use in the smoking analysis and smoking in the snuff analysis). The risk of acoustic neuroma was greatly reduced in male current smokers (odds ratio (OR) = 0.41, 95% confidence interval (CI): 0.23, 0.74) and moderately reduced in female current smokers (OR = 0.70, 95% CI: 0.40, 1.23). In contrast, current snuff use among males was not associated with risk of acoustic neuroma (OR = 0.94, 95% CI: 0.57, 1.55). The authors’ findings are consistent with previous reports of lower acoustic neuroma risk among current cigarette smokers than among never smokers. The absence of an association between snuff use and acoustic neuroma suggests that some constituent of tobacco smoke other than nicotine may confer protection against acoustic neuroma