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Search Results: 1 - 10 of 404362 matches for " Piia M. Bj?rn "
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Diversity in Family Structure—Diversity in Communication between Family Members?  [PDF]
Piia M. Bjrn, Minna Kytt?l?
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.43A035
Abstract:

This study aims at investigating the parent-adolescent communication of Finnish families from a multi informant perspective. Thirteen- and fourteen-year-old adolescents (n = 171) and their parents were asked to complete a questionnaire examining positive and problematic communication between the two parties. Information about their family structure was collected. The results indicated an interrelationship between parental and adolescent assessments, particularly regarding negative aspects of communication. The boys assessed their communication with parents as more positive than did the girls. The results showed that the mothers still are the synchronizing hearts of communication in modern families, whereas the fathers’ roles in family communication were more modest suggesting that the stereotypical roles in Finnish families persist even today.

The Preauricular Sinus: A Novel Approach for Complete Bilateral Excision via a Modified Face-Lift Incision  [PDF]
Florian M. Lampert, Georgios Koulaxouzidis, G. Bjrn Stark
Modern Plastic Surgery (MPS) , 2013, DOI: 10.4236/mps.2013.32015
Abstract:

Objectives/Hypothesis: To present a novel technique based on the combination of aesthetic and reconstructive techniques for the radical and safe excision of preauricular sinus along with minimal cosmetic impairing. Study Design: Case report, description of surgical method and brief overview of the literature. Methods: In a patient with bilateral preauricular sinus, we used a modified face-lift incision and SMAS-fixation instead of solely excising the sinus with skin ellipse. Results: Total removal of the bilateral fistulous systems could be achieved, along with a very aesthetically pleasing result. Conclusions: The surgical approach shown here allows a radical excision with only minimal aesthetic impairment using a shortened facelift-incision and SMAS-fixation.

Resolution among major placental mammal interordinal relationships with genome data imply that speciation influenced their earliest radiations
Bjrn M Hallstr?m, Axel Janke
BMC Evolutionary Biology , 2008, DOI: 10.1186/1471-2148-8-162
Abstract: The rigorous data handling, recursive BLAST, successfully removed the sequences from gene families, including those from well-known families hemoglobin, olfactory, myosin and HOX genes, thus avoiding alignment of possibly paralogous sequences. The current phylogenomic analysis of 3,012 genes (2,844,615 nucleotides) from a total of 22 species yielded statistically significant support for most relationships. While some major clades were confirmed using genomic sequence data, the placement of the treeshrew, bat and the relationship between Boreoeutheria, Xenarthra and Afrotheria remained problematic to resolve despite the size of the alignment. Phylogenomic analysis of divergence times dated the basal placental mammal splits at 95–100 million years ago. Many of the following divergences occurred only a few (2–4) million years later. Relationships with narrow divergence time intervals received unexpectedly limited support even from the phylogenomic analyses.The narrow temporal window within which some placental divergences took place suggests that inconsistencies and limited resolution of the mammalian tree may have their natural explanation in speciation processes such as lineage sorting, introgression from species hybridization or hybrid speciation. These processes obscure phylogenetic analysis, making some parts of the tree difficult to resolve even with genome data.Recently the resolution of the mammalian tree made a quantum leap forward with the analysis of protein coding sequences of whole genome data [1-4]. The genome data allowed collecting the protein coding sequences from some 3000 genes, which is equivalent to 2.2 million nucleotides (Mnt), representing ≈10% of all coding sequences [2]. During the last 15 years since the influential review of Novacek [5] on the mammalian evolution, many previously uncertain relationships are now becoming consistently resolved by different data sets and analytical approaches. However, lately released mammal genome data have no
Monitoring the Size and Lateral Dynamics of ErbB1 Enriched Membrane Domains through Live Cell Plasmon Coupling Microscopy
Guoxin Rong, Bjrn M. Reinhard
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0034175
Abstract: To illuminate the role of the spatial organization of the epidermal growth factor receptor (ErbB1) in signal transduction quantitative information about the receptor topography on the cell surface, ideally on living cells and in real time, are required. We demonstrate that plasmon coupling microscopy (PCM) enables to detect, size, and track individual membrane domains enriched in ErbB1 with high temporal resolution. We used a dendrimer enhanced labeling strategy to label ErbB1 receptors on epidermoid carcinoma cells (A431) with 60 nm Au nanoparticle (NP) immunolabels under physiological conditions at 37°C. The statistical analysis of the spatial NP distribution on the cell surface in the scanning electron microscope (SEM) confirmed a clustering of the NP labels consistent with a heterogeneous distribution of ErbB1 in the plasma membrane. Spectral shifts in the scattering response of clustered NPs facilitated the detection and sizing of individual NP clusters on living cells in solution in an optical microscope. We tracked the lateral diffusion of individual clusters at a frame rate of 200 frames/s while simultaneously monitoring the configurational dynamics of the clusters. Structural information about the NP clusters in their membrane confinements were obtained through analysis of the electromagnetic coupling of the co-confined NP labels through polarization resolved PCM. Our studies show that the ErbB1 receptor is enriched in membrane domains with typical diameters in the range between 60–250 nm. These membrane domains exhibit a slow lateral diffusion with a diffusion coefficient of = |0.0054±0.0064| μm2/s, which is almost an order of magnitude slower than the mean diffusion coefficient of individual NP tagged ErbB1 receptors under identical conditions.
Variability in Echolocation Call Intensity in a Community of Horseshoe Bats: A Role for Resource Partitioning or Communication?
Maike Schuchmann,Bjrn M. Siemers
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0012842
Abstract: Only recently data on bat echolocation call intensities is starting to accumulate. Yet, intensity is an ecologically crucial parameter, as it determines the extent of the bats' perceptual space and, specifically, prey detection distance. Interspecifically, we thus asked whether sympatric, congeneric bat species differ in call intensities and whether differences play a role for niche differentiation. Specifically, we investigated whether R. mehelyi that calls at a frequency clearly above what is predicted by allometry, compensates for frequency-dependent loss in detection distance by using elevated call intensity. Maximum echolocation call intensities might depend on body size or condition and thus be used as an honest signal of quality for intraspecific communication. We for the first time investigated whether a size-intensity relation is present in echolocating bats.
What causes increasing and unnecessary use of radiological investigations? a survey of radiologists' perceptions
Kristin B Lysdahl, Bjrn M Hofmann
BMC Health Services Research , 2009, DOI: 10.1186/1472-6963-9-155
Abstract: In a mailed questionnaire radiologist members of the Norwegian Medical Association were asked to rate potential causes of increased investigation volume (fifteen items) and unnecessary investigations (six items), using five-point-scales. Responses were analysed by using summary statistics and Factor Analysis. Associations between variables were determined using Students' t-test, Spearman rank correlation and Chi-Square tests.The response rate was 70% (374/537). The highest rated causes of increasing use of radiological investigations were: a) new radiological technology, b) peoples' demands, c) clinicians' intolerance for uncertainty, d) expanded clinical indications, and e) availability. 'Over-investigation' and 'insufficient referral information' were reported the most frequent causes of unnecessary investigations. Correlations between causes of increasing and unnecessary radiology use were identified.In order to manage the growth in radiological imaging and curtail inappropriate investigations, the study findings point to measures that influence the supply and demand of services, specifically to support the decision-making process of physicians.Utilization of high-technology and high-cost diagnostic imaging has increased substantially over the past decades [1-7]. This growth can be attributed to various factors such as aging populations, advances in imaging technology, that radiology is indicated in more clinical conditions [6,8], availability of the technology [9] and increasing number of radiologists [10]. Referring physicians have a central role in how radiological services are used, and studies have singled out several factors affecting their test-ordering behaviour, including patients' expectations [11-14], professional uncertainty [12,14], stress from uncertainty and time constraints [15], defensive medicine [16,17], payment system [18], and physicians' self-referral [19,20]. The significance of these factors may vary by institutional structures and across
Sivilstand og mental helse
Bjrn Lau m.fl.
Norsk Epidemiologi , 2009,
Abstract: -
Kreft og d delighet blant norske feiere: Vurdering av datakvalitet
Bjrn M?ller,Aage Andersen
Norsk Epidemiologi , 2009,
Abstract: ENGLISH SUMMARY M ller B, Andersen Aa. Cancer and mortality among Norwegian chimney sweeps. Nor J Epidemiol 2001; 11 (2): 193-196. The aim of the study was to investigate cancer incidence and mortality among Norwegian chimney sweeps. A cohort of 1483 persons was established by collecting information about current and former chimney sweeps from all the local authorities. Information from housing censuses (HS) in 1960, 1970 and 1980 were used to study the quality of the data. This revealed that the mortality among those chimney sweeps in HS that are included in our cohort is lower than the mortality among those not reported to us from the local authorities. Because of this, only a sub-cohort of 287 chimney sweeps from the largest cities were considered reliable. The uncertainty concerning risks for the different cancer sites in this group is large, since calculations are based on very few cases. The standardized incidence rate (SIR) for total cancer is 1.3 (95% CI: 1.0–1.8), and the standardized mortality rate (SMR) for all deaths is 1.2 (95% CI: 1.0–1.4). We also analyzed the 1292 persons who stated chimney sweep as occupation in the housing censuses in 1960, 1970 or 1980. SIR and SMR analyses in this group show no increased risk for any specific cancer sites, nor for any cause specific death.
Insider Trading in Germany - Do Corporate Insiders Exploit Inside Information?
Bjrn M. Dymke,Andreas Walter
BuR : Business Research , 2008,
Abstract: Our study focuses on the question whether corporate insiders in Germany exploit inside information while trading in their company’s stock. In contrast to prior international studies, which are not able to link insider transactions to a formal definition of inside information, we relate insider transactions to subsequent releases of inside information via ad-hoc news disclosures. We find evidence that corporate insiders as a group seem to trade on inside information. Moreover, members of the supervisory board seem to be most active in exploiting inside information, since they realize exceptionally high profits with their frequent front-running transactions.
Rotating Dilaton Black Holes
Bjrn Jensen,Ulf Lindstr?m
Physics , 1995, DOI: 10.1103/PhysRevD.52.3543
Abstract: We consider the axially symmetric coupled system of gravitation, electromagnetism and a dilaton field. Reducing from four to three dimensions, the system is described by gravity coupled to a non-linear $\sigma$-model. We find the target space isometries and use them to generate new solutions. It seems that it is only possible to generate rotating solutions from non-rotating ones for the special cases when the dilaton coupling parameter $a=0, \pm \sqrt{3}$. For those particular values, the target space symmetry is enlarged.
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