954 research outputs found
Retinal Vessel Extraction with the Image Ray Transform
No full textExtraction of blood vessels within the retina is an important task that can help in detecting a number of diseases, including diabetic retinopathy. Current techniques achieve good, but not perfect performance and this suggests that improved preprocessing may be needed. The image ray transform is a method to highlight tubular features (such as blood vessels) based upon an analogy to light rays. The transform has been employed to enhance retinal images from the DRIVE database, and a simple classification technique has been used to show the potential of the transform as a preprocessor for other supervised learning techniques. Results also suggest potential for using the ray transform to detect other features in the fundus images, such as the fovea and optic disc
Letter from Tommy Ow, Palace Meat Company, to whom it may concern
No full textCorrespondence from Tommy Ow to Whom it May Concern regarding employment history of George Hideo Nakamura.The Japanese American Archival Collection documents the people, places, and daily life of Japanese Americans, primarily those who lived in the once thriving community of pre-war Florin in the Sacramento region, as well as the conditions in American incarceration camps during World War II. The approximately 7,000 original items include personal and official letters, photographs, diaries, arts and crafts, newsletters, textiles, camps artifacts, yearbooks and other publications
Landsat MSS classification of fire fuel types in Wood Buffalo National Park, northern Canada
No full textJ1: Global Ecology & Biogeography Letters; M3: Article; Milne, David Franklin, Steven E. Wilson, Bradley A. Ghitter, Geoff Heathcott, Mark McCaffrey, Thomas M. Ow, Charlotte F. Y.; Source Information: Mar1994, Vol. 4 Issue 2, p33; Subject Term: FOREST fires; Author-Supplied Keyword: Canada (Wood Buffalo National Park); Author-Supplied Keyword: Forest fire; Author-Supplied Keyword: Fuel type classification; Author-Supplied Keyword: Landsat data; Number of Pages: 0p; Document Type: Articl
Fluorescence in situ hybridization analysis of chromosome 12p in paraffin-embedded tissue is useful for establishing germ cell origin of metastatic tumors
No full textShrink Sleeve Labeling: Fundamental understanding of heat transfer due to the ow field
No full textIn this thesis the goal is to grow the fundamental understanding of the Shrink Sleeve Labeling process, speciffically on the steam tunnel equipment. The research is focused on the heat transfer phenomena of the ow on to the bottle. From literature was found that the problem could be split into 3 general domains: 1) free jet ow, 2) heat transfer by impinging jet and 3) condensation heat transfer. The condensation part was seen as an optional part since it would have a big impact on the way the numerical model will be setup. This thesis therefore is setup to handle the free jet ow and heat transfer by an impinging jet.Aerospace Engineering | Aerodynamics and Wind Energ
Experimental investigation of re-entry aerodynamic phenomena - Development of non-intrusive ?ow diagnostics in a Ludwieg tube
No full textTo further improve the design of hypersonic vehicles so that fully reusable systems become a reality, the detailed understanding of the ?ow ?eld that the vehicle generates is of paramount importance. The thesis deals with the aspects of experimental ?ow research which includes also the ?ow facility and the measurement techniques. First a description is given of the investigation and assessment of the Hypersonic Test Facility Delft (HTFD), which is the facility used in the experiments. Thereafter two measurement techniques, particle image velocimetry (PIV) and quantitative infrared thermography (QIRT) are introduced that enable to obtain high quality measurement data of the hypersonic ?ow ?eld generated by the HTFD. In the remainder of the thesis two important ?ow phenomena, shock wave boundary layer interaction and boundary layer transition, have been investigated using PIV and QIRT that are of great importance for re-entry vehicles.AerodynamicsAerospace Engineerin
The Challenging Conformational Landscape of Cysteamine···H2O Revealed by the Strong Interplay of Rotational Spectroscopy and Quantum Chemical Calculations
No full textA 1:1 molecular complex of cysteamine with water is shown to adopt a cage-like structure where cysteamine accepts a relatively strong hydrogen bond from water while also engaging in two additional weaker interactions (SH···Ow and CH···Ow). Experimental and theoretical approaches confirm this conformer as the global minimum on the potential energy surface. Fitting of key structural parameters to experimentally determined moments of inertia yields consistent and accurate results for rotational and 14N nuclear quadrupole coupling constants which are shown to be challenging to calculate using ab initio methods. Comprehensive analysis of the intermolecular interactions and a thorough comparison with the properties of aminoethanol-water is presented, utilizing independent gradient models based on Hirshfeld partition, quantum theory of atoms-in-molecules, and symmetry-adapted perturbation theory approaches. As expected, the OH group of aminoethanol is a stronger hydrogen bond donor than the SH group in cysteamine, while the CH···Ow interaction is a key determining factor of the conformational landscape in both cysteamine-water and aminoethanol-water complexes. The results show very clearly that the synergy between theoretical calculations and experimental results is not only desirable but mandatory to get the right answers in such complex conformational surfaces. The results are also clear benchmarks for the accuracy of different theoretical methods in assessing the structures and energy order of the conformations
Identical allelic losses in mature teratoma and other histologic components of malignant mixed germ cell tumors of the testis
No full textNumerical and experimental investigation on the resistance of a human upper airway: A study to decrease pressure loss by the introduction of a swirling flow
No full textThis report comprises the research entitled 'Numerical and experimental investigation on the resistance of a human upper airway'. The objective of this research is: To investigate the effects of a swirl producing inlet on the pressure drop in a simplified human upper airway model at high ow rates, by means of numerical simulations and experiments. In the literature study done by the author Hak (2014b) it is found that during exercise up to 15% of the maximum oxygen uptake (V O2;max) is spent by the breathing muscles. The breathing muscles support the breathing process by moving the diaphragm, creating a low pressure in the thoracic region, thereby starting the inflow of air. Since the human upper airway is featured by a complex shape, associated with highly three-dimensional ow patterns, it has a relatively high ow resistance compared to the remainder of the airways. If the ow pattern would be influenced by passive ow control in the form of a breathing aid, the pressure drop could be reduced, thereby decreasing the demand on the breathing muscles. The result is that more O2 can be used in the skeletal muscles and thus the anaerobic-threshold is postponed. This lead to the following main research question: What kind of swirl generating mouthpiece device can influence the inhaled ow, such that a pressure drop reduction is achieved, during intensive exercise? The research started off with an identification and simulation of the the upper airway ow. Typical human upper airway ow behavior which cause losses in pressure are found to be jetlike ow, re-circulating ow, detached ow, secondary ows such as Dean ow. If the upper airway is highly idealized, it can be seen as 'elbow pipe', a pipe with a 90o bend. Dean vortices and boundary layer separation in bent pipe ow are responsible for pressure losses. For the setting up of the simulation, the process of breathing is translated into boundary conditions. Simpli_cations and assumptions are done to the usual periodic behavior of breathing: a stationary inhalation rate is assumed, and only inspiration is considered. The compliance of the airway is not taken into account for simplicity and the ow rate is based on that of an exercising male adultAerospace Engineerin
Estudios de cronología relativa: el tercer alargamiento compensatorio y la monoptongación de /ej/, /ow/
No full textInternational audienceThis paper deals with the problematic quality of the secondary long-mid vowels as a result of the third compensatory lengthening in Bartonks Doris media and Cyrenaean. The author first examines the data of these dialects in order to stablish the relative chronology between this process and the monophthongization of /ej/, /ow/; secondly, he proposes a new tripartite classification of the greek dialects as far as these two variables are concerned
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