24 research outputs found
Coarsening of granular clusters: two types of scaling behaviors
We report on an experimental study of small cluster dynamics during the
coarsening process in driven granular submonolayers of 120mkm bronze particles.
The techniques of electrostatic and vertical mechanical vibration were employed
to excite the granular gas. We measure the scaling exponent for the evaporation
of small clusters during coarsening. It was found that the surface area of
small clusters S vs time t behaves as S ~ (t_0-t)^(2/3) for lower frequencies
and S ~ (t_0-t) for higher frequencies. We argue that the change in the scaling
exponent is related to the transition from three dimensional to two dimensional
character of motion in the granular gas.Comment: 4 pages,5 figures, submitted to Phys.Rev.
Nonclosure technique with saline-coupled bipolar electrocautery in management of the cut surface after distal pancreatectomy
Analysis of DNA Methylation in Young People: Limited Evidence for an Association Between Victimization Stress and Epigenetic Variation in Blood.
DNA methylation has been proposed as an epigenetic mechanism by which early-life experiences become "embedded" in the genome and alter transcriptional processes to compromise health. The authors sought to investigate whether early-life victimization stress is associated with genome-wide DNA methylation
Sources of Variation in the Abundance and Detection of the Endangered Florida Grasshopper Sparrow
Physical and chemical characterization of McIntyre Powder: An aluminum dust inhaled by miners to combat silicosis
Extremity Injuries as Predictors of Emergency Care Resource Needs among Blunt Trauma Patients in Japan
Incommensurate magnetism in PrBa<sub>2</sub>Cu<sub>3</sub>O<sub>6</sub><sub>.</sub><sub>9</sub><sub>2</sub>
The Management of Asymptomatic Congenital Pulmonary Airway Malformation: Results of a European Delphi Survey
Consensus on the optimal management of asymptomatic congenital pulmonary airway malformation (CPAM) is lacking, and comparison between studies remains difficult due to a large variety in outcome measures. We aimed to define a core outcome set (COS) for pediatric patients with an asymptomatic CPAM. An online, three-round Delphi survey was conducted in two stakeholder groups of specialized caregivers (surgeons and non-surgeons) in various European centers. Proposed outcome parameters were scored according to level of importance, and the final COS was established through consensus. A total of 55 participants (33 surgeons, 22 non-surgeons) from 28 centers in 13 European countries completed the three rounds and rated 43 outcome parameters. The final COS comprises seven outcome parameters: respiratory insufficiency, surgical complications, mass effect/mediastinal shift (at three time-points) and multifocal disease (at two time-points). The seven outcome parameters included in the final COS reflect the diversity in priorities among this large group of European participants. However, we recommend the incorporation of these outcome parameters in the design of future studies, as they describe measurable and validated outcomes as well as the accepted age at measurement