Submarine landform assemblages and sedimentary processes related to glacier surging in Kongsfjorden, Svalbard

High-resolution swath-bathymetry data from inner Kongsfjorden, Svalbard, reveal characteristic landform assemblages formed during and after surges of tidewater glaciers, and provide new insights into the dynamics of surging glaciers. Glacier front oscillations and overriding related to surge activity lead to the formation of overridden moraines, glacial lineations of two types, terminal moraines, associated debris lobes and De Geer moraines. In contrast to submarine landform assemblages from other Svalbard fjords, the occurrence of two kinds of glacial lineations and the presence of De Geer moraines suggest variability in the landforms produced by surge-type tidewater glaciers. All the landforms in inner Kongsfjorden were deposited during the last c. 150 years. Lithological and acoustic data from the innermost fjord reveal that suspension settling from meltwater plumes as well as ice rafting are dominant sedimentary processes in the fjord, leading to the deposition of stratified glacimarine muds with variable numbers of clasts. Reworking of sediments by glacier surging results in the deposition of sediment lobes containing massive glacimarine muds. Two sediment cores reveal minimum sediment accumulation rates related to the Kongsvegen surge from 1948; these were 30 cm a-1 approximately 2.5 km beyond the glacier front shortly after surge termination, and rapidly dropped to an average rate of 1.8 cm a-1 in ∼ 1950, during glacier retreat

Physical demand but not dexterity is associated with motor flexibility during rapid reaching in healthy young adults

Healthy humans are able to place light and heavy objects in small and large target locations with remarkable accuracy. Here we examine how dexterity demand and physical demand affect flexibility in joint coordination and end-effector kinematics when healthy young adults perform an upper extremity reaching task. We manipulated dexterity demand by changing target size and physical demand by increasing external resistance to reaching. Uncontrolled manifold analysis was used to decompose variability in joint coordination patterns into variability stabilizing the end-effector and variability de-stabilizing the end-effector during reaching. Our results demonstrate a proportional increase in stabilizing and de-stabilizing variability without a change in the ratio of the two variability components as physical demands increase. We interpret this finding in the context of previous studies showing that sensorimotor noise increases with increasing physical demands. We propose that the larger de-stabilizing variability as a function of physical demand originated from larger sensorimotor noise in the neuromuscular system. The larger stabilizing variability with larger physical demands is a strategy employed by the neuromuscular system to counter the de-stabilizing variability so that performance stability is maintained. Our findings have practical implications for improving the effectiveness of movement therapy in a wide range of patient groups, maintaining upper extremity function in old adults, and for maximizing athletic performance

Ice thickness measurements and volume estimates for glaciers in Norway

Glacier volume and ice thickness distribution are important variables for water resource management in Norway and the assessment of future glacier changes. We present a detailed assessment of thickness distribution and total glacier volume for mainland Norway based on data and modelling. Glacier outlines from a Landsat-derived inventory from 1999 to 2006 covering an area of 2692 ± 81 km² were used as input. We compiled a rich set of ice thickness observations collected over the past 30 years. Altogether, interpolated ice thickness measurements were available for 870 km² (32%) of the current glacier area of Norway, with a total ice volume of 134 ± 23 km³. Results indicate that mean ice thickness is similar for all larger ice caps, and weakly correlates with their total area. Ice thickness data were used to calibrate a physically based distributed model for estimating the ice thickness of unmeasured glaciers. The results were also used to calibrate volume–area scaling relations. The calibrated total volume estimates for all Norwegian glaciers ranged from 257 to 300 km³

Demographical, personality, alcohol use, and mental health characteristics associated with different alcoholic beverage preferences among students

The study investigates correlates (i.e. demographics, personality, alcohol use and alcohol-related harm, alcohol expectancies, and mental health) of different alcoholic beverage preferences (i.e. beer/alcopops/cider, wine, and liquor/spirits). Data were collected by an online survey during fall 2016. Participants were invited to the survey based on participation in a former survey that was sent to students in Bergen, Norway, in fall 2015. The current sample consists of 5,217 participants. A multinomial regression analysis was conducted, where alcoholic beverage preferences comprised the dependent variable. Several correlates were associated with beverage preferences. For instance, being a woman and the personality trait conscientiousness were inversely related to a preference for beer/alcopops/cider while positively associated with a preference for wine. Preferences for wine or liquor/spirits were positively associated with depression and inversely related to anxiety. Conscientiousness as a personality trait might be a common factor in the relationship between wine preference and favourable health outcomes, and this trait should be controlled for in future studies. The current findings seem contrary to the assumed gender equality in Norway, where the strong association between sex and alcoholic beverage preferences suggests that traditional gender divisions prevail even in the current young and urban sample.publishedVersio

Telemedicin: Et maktperspektiv

Til tross for betydelige statlige investeringer over flere år, er ikke telemedisin en etablert behandlingsform i norsk helsevesen. Lav utbredelse forklares ofte med at leger og andre helseprofesjonelle fungerer som portvakter. Etter vår mening er det behov for å heve blikket og supplere forklaringene på individnivå. I denne artikkelen presenterer vi en empirisk analyse inspirert av Bourdieus maktperspektiv. Vi har brukt intervju, observasjons og dokumentmateriale fra to empiriske case, teleslag og teledermatologi. I begge casene var legene positive til bruk av telemedisin, men løsningene ble lite brukt. Analysen får frem hvordan telemedisin er mer enn nye verktøy for klinkerne, og faktisk trigger diskusjoner om selve kjernen i helsefeltets autonomi; spørsmålet om hva som er den riktige behandling. Vi konkluderer med at mottagelsen av telemedisin i klinisk praksis må forstås i lys av pågående maktkamper i helsefeltet, mellom statlige styringsinteresser på den ene siden og profesjonell autonomi på den andre.Telemedicine; power disruptions in health careAlthough the development of telemedicine has been a priority in Norwegian public health care for over 20 years, only a limited number of applications have been established as routine services. Dominant explanations of slow diffusion points to clinicians and their role as gatekeepers. We argue there is a need to look beyond the ubiquitous accounts of individual influences, and include power structures in the analysis of telemedicine diffusion. In this paper, we present an empirical analysis inspired by Bourdieu’s conceptual framework. The data consist of interviews, observations, and public- and project documents from two case studies; telestroke and teledermatology. In both cases, the clinicians were positive and involved in the implementation of telemedicine. Nevertheless, the services were not developed into routine practice; in fact, they were rarely used. Telemedicine touches upon the core value of health care activity: how to define the best patient treatment. The paper argues telemedicine might disrupt and be disrupted by existing power struggles in the health care sector. We conclude that slow diffusion of telemedicine should be understood in light of ongoing negotiations and power struggles between state regulatory powers on the one hand and health professional autonomy on the other

Bivariate causal mixture model quantifies polygenic overlap between complex traits beyond genetic correlation.

Accumulating evidence from genome wide association studies (GWAS) suggests an abundance of shared genetic influences among complex human traits and disorders, such as mental disorders. Here we introduce a statistical tool, MiXeR, which quantifies polygenic overlap irrespective of genetic correlation, using GWAS summary statistics. MiXeR results are presented as a Venn diagram of unique and shared polygenic components across traits. At 90% of SNP-heritability explained for each phenotype, MiXeR estimates that 8.3 K variants causally influence schizophrenia and 6.4 K influence bipolar disorder. Among these variants, 6.2 K are shared between the disorders, which have a high genetic correlation. Further, MiXeR uncovers polygenic overlap between schizophrenia and educational attainment. Despite a genetic correlation close to zero, the phenotypes share 8.3 K causal variants, while 2.5 K additional variants influence only educational attainment. By considering the polygenicity, discoverability and heritability of complex phenotypes, MiXeR analysis may improve our understanding of cross-trait genetic architectures