Aims. We selected a large sample of O-B stars that were considered as (candidate) slowly pulsating B, β Cep, and Maia stars after the analysis of their hipparcos data. We analysed our new seven ...passband geneva data collected for these stars during the first three years of scientific operations of the mercator telescope. We performed a frequency analysis for 28 targets with more than 50 high-quality measurements to improve their variability classification. For the pulsating stars, we tried both to identify the modes and to search for rotationally split modes. Methods. We searched for frequencies in all the geneva passbands and colours by using two independent frequency analysis methods and we applied a 3.6 S/N-level criterion to locate the significant peaks in the periodograms. The modes were identified by applying the method of photometric amplitudes for which we calculated a large, homogeneous grid of equilibrium models to perform a pulsational stability analysis. When both the radius and the projected rotational velocity of an object are known, we determined a lower limit for the rotation frequency to estimate the expected frequency spacings in rotationally split pulsation modes. Results. We detected 61 frequencies, among which 33 are new. We classified 21 objects as pulsating variables (7 new confirmed pulsating stars, including 2 hybrid β Cep/SPB stars), 6 as non-pulsating variables (binaries or spotted stars), and 1 as photometrically constant. All the Maia candidates were reclassified into other variability classes. We performed mode identification for the pulsating variables for the first time. The most probable $\ell$ value is 0, 1, 2, and 4 for 1, 31, 9, and 5 modes, respectively, including only 4 unambiguous identifications. For 7 stars we cannot rule out that some of the observed frequencies belong to the same rotationally split mode. For 4 targets we may begin to resolve close frequency multiplets.
A dynamic model was developed describing dielectric heating dynamics of a heterogeneous material, in which the dispersed phase heats more quickly than the surrounding phase. The model includes ...effects of scattering by small particles, absorption and differences in thermal and conduction properties, as well as domain size.
The model shows that the smallest domain sizes that can be heated selectively are determined by dielectric and thermal properties of both domains and the applied field strength. In the case of food products, it can be concluded that the minimal size at which significant temperature differences can occur is about 1 mm applying current available microwave technology.
However, in the case of pulsed fields, the domains that can be heated selectively can be orders of magnitude smaller than with constant fields, without requiring higher overall energy inputs.
The Mid-Infrared Instrument (MIRI) on the James Webb Space Telescope (JWST), has imaging, four coronagraphs and both low and medium resolution spectroscopic modes . Being able to simulate MIRI ...observations will help commissioning of the instrument, as well as get users familiar with representative data. We designed the MIRI instrument simulator (MIRISim) to mimic the on-orbit performance of the MIRI imager and spectrometers using the Calibration Data Products (CDPs) developed by the MIRI instrument team. The software encorporates accurate representations of the detectors, slicers, distortions, and noise sources along the light path including the telescope's radiative background and cosmic rays. The software also includes a module which enables users to create astronomical scenes to simulate. MIRISim is a publicly available Python package that can be run at the command line, or from within Python. The outputs of MIRISim are detector images in the same uncalibrated data format that will be delivered to MIRI users. These contain the necessary metadata for ingestion by the JWST calibration pipeline.
This paper presents our experience of the problem of diagnosis and surgical treatment of malignant parotid tumors, based on a retrospective evaluation of a series of 478 parotid tumors, of which 100 ...were malignant. Out of 75 primaris malignant tumors of epithelial origin, 35 belonged to the "epidermoid" group (adenocarcinomas, undifferentiated carcinomas, malignant mixed tumors, squamous cell carcinoma), 20 were mucoepidermoid carcinomas, 15 adenoid cystic carcinomas and 5 were acinic cell carcinoma. Altogether, 58.7% of the treated patients do not at the moment present evidence of disease; 33.3% are dead from the disease or are alive with active disease; 5.3% are dead from other causes and 2.7% are lost to follow-up. Underlining the importance of histologic examination of the swelling by intraoperative biopsy, the authors propose a diagnostic and therapeutic protocol.
Glottal insufficiency in cases of organic & functional dysphonia (N = 71 & 594, respectively) was treated with 98% success by a new method addressing Ss' self-induced tensioadductive hypotonia. ...Depending on type of dysphonia, a frequency band is chosen for either raising or lowering voice tone. Exercises in higher or lower tone are accompanied initially by digital pressure on the larynx & thyroid laminae, producing glottal stricture & providing proprioceptive training. The method is based on observed improvement of voice clarity & vocal cord facing in transitions from a lower- to a higher-pitched vowel sound. 1 Table. J. Hitchcock
Relationships between traits of organisms and the structure of their metacommunities have so far mainly been explored with meta‐analyses. We compared metacommunities of a wide variety of aquatic ...organism groups (12 groups, ranging from bacteria to fish) in the same set of 99 ponds to minimise biases inherent to meta‐analyses. In the category of passive dispersers, large‐bodied groups showed stronger spatial patterning than small‐bodied groups suggesting an increasing impact of dispersal limitation with increasing body size. Metacommunities of organisms with the ability to fly (i.e. insect groups) showed a weaker imprint of dispersal limitation than passive dispersers with similar body size. In contrast, dispersal movements of vertebrate groups (fish and amphibians) seemed to be mainly confined to local connectivity patterns. Our results reveal that body size and dispersal mode are important drivers of metacommunity structure and these traits should therefore be considered when developing a predictive framework for metacommunity dynamics.
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