Search results for "Ultra"
showing 10 items of 4451 documents
How to address the treatment of idiopathic plantar fasciitis with mini-invasive techniques: HRUS criterion
2009
VUV emission spectroscopy combined with H- density measurements in the ion source Prometheus I
2016
“Prometheus I” is a volume H− negative ion source, driven by a network of dipolar electron cyclotron resonance (ECR; 2.45 GHz) modules. The vacuum-ultraviolet (VUV) emission spectrum of low-temperature hydrogen plasmas may be related to molecular and atomic processes involved directly or indirectly in the production of negative ions. In this work, VUV spectroscopy has been performed in the above source, Prometheus I, both in the ECR zones and the bulk (far from ECR zones and surfaces) plasma. The acquired VUV spectra are correlated with the negative ion densities, as measured by means of laser photodetachment, and the possible mechanisms of negative ion production are considered. The well-e…
Pleiras telpas patoloģijas diagnosticēšanas algoritmi radioloģijā
2018
Bakalaura darba tēma ir „Pleiras telpas patoloģijas diagnosticēšanas algoritmi radioloģijā”. Darba mērķis bija noskaidrot pleiras patoloģiju diagnostisko algoritmu novērtēšanu. Mērķa sasniegšanai tika izvirzīti sekojoši uzdevumi: analizēt literatūru par pleiras patoloģijām, par pleiras patoloģijas veidiem un biežākajiem slimības cēloņiem; analizēt literatūrā aprakstītās pleiras telpas patoloģijas diagnosticēšanas algoritmu iespējas; izpētīt radioloģijas metožu pielietošanu pleiras pataloģijas diagnosticēšanā, izdarīt secinājumus. Veicot pētījumu ar kvalitatīvo pētījuma metodi tika pētīta radioloģisko metožu diagnostikas iespējas pie pleiras telpas pataloģijām. Apkopota informācija par krūšu…
Análisis ideológico-discursivo de la nueva derecha radical. El caso de Vox y el nativismo
2022
Durante las últimas décadas ha ido desarrollándose un nuevo auge de la ultraderecha a nivel mundial que está protagonizado por unas formaciones de derecha radical nacidas en el contexto sociopolítico actual y que persiguen unos intereses y emplean unos discursos populistas que no coinciden con las directrices profundamente antidemocráticas que seguían tradicionalmente las organizaciones que representaban este espacio del espectro ideológico desde los años treinta, pero que actualmente ha quedado dividido en dos grandes familias: la vieja y, en la que se centra este trabajo, la nueva. España, al igual que la mayoría de los países europeos, no se ha librado del auge de esta nueva familia, pue…
Comparison of Post-Weld Treatment of High-Strength Steel Welded Joints in Medium Cycle Fatigue
2010
This paper presents a comparison of three post-weld treatments for fatigue life improvement of welded joints. The objective is to determine the most suitable post-weld treatment for implementation in mass production of certain crane components manufactured from very high-strength steel. The processes investigated are: burr grinding, TIG dressing and ultrasonic impact treatment. The focus of this investigation is on the so-called medium cycle area, i.e. 10 000-500 000 cycles and very high stress ranges. In this area of fatigue design, the use of very high strength steel becomes necessary, since the stress range can exceed the yield-strength of ordinary structural steel, especially when consi…
Challenges Associated with Byproducts Valorization—Comparison Study of Safety Parameters of Ultrasonicated and Fermented Plant-Based Byproducts
2020
In order to promote the efficient use of byproducts from the production of plant-based beverages, which still contain a large amount of nutritional and functional compounds, microbiological and chemical safety characteristics should be evaluated and, if needed, improved. Many challenges are associated with byproducts valorization, and the most important ones, which should be taken into account at the further steps of valorization, are biological and chemical safety. For safety improving, several technological treatments (biological, physical etc.) can be used. In this study, the influence of low-frequency ultrasonication (US) and fermentation with Lactobacillus casei LUHS210 strain, as phys…
Evaluation of Clutch Plate Integrity with Non-Destructive Methods
2009
Abstract Nondestructive evaluation (NDE) represents an important phase in the life cycle of a product to detect defects both in service and in production. NDE techniques most commonly used to detect surface defects are visual inspection and methods based on eddy current and ultrasound. Laser and non-contact sensors have been recently used to inspect ultrasonically without contact. Components with complex geometry are usually inspected combining several NDE techniques, or simply visually where analysis and evaluation of results are performed by an operator based on specific parameters of acceptance. This last method is currently used to inspect the clutch plates since their complex geometry,…
Entre Communitas e immunitas: la profanación de la Comunidad Jurídica
2011
RESUMEN Partiendo del nexo entre comunidad y violencia, se analizan las categorías communitas e immunitas del filósofo italiano Roberto Esposito para plantear la posibilidad de una comunidad impolítica experimentada a través de la profanación. ABSTRACT Based on the link between community and violence, analyzes the immunitas and communitas categories of the Italian philosopher Roberto Esposito to explain the possibility of an impolitic community experienced by the profanation
Extraction Methods of Essential Oils From Herbs and Spices
2017
International audience; This chapter describes both conventional and non‐conventional extraction methods of essential oils (EOs) from herbs and spices. Although hydrodistillation, steam distillation and solvent extraction are the most applied methods, several non‐conventional technologies have been evaluated, especially in respect to EO recovery, and a great potential has been attributed to these non‐conventional methods. For instance, ultrasound, microwave, supercritical fluid, pulsed electric fields, ohmic‐heating and microwave (MW) extraction techniques applied alone or combined with other techniques are potent tools to obtain EOs in a 'green' way from natural resources such as aromatic …
Ultrafast Interface Charge Separation in Carbon Nanodot-Nanotube Hybrids
2021
Carbon dots are an emerging family of zero-dimensional nanocarbons behaving as tunable light harvesters and photoactivated charge donors. Coupling them to carbon nanotubes, which are well-known electron acceptors with excellent charge transport capabilities, is very promising for several applications. Here, we first devised a route to achieve the stable electrostatic binding of carbon dots to multi- or single-walled carbon nanotubes, as confirmed by several experimental observations. The photoluminescence of carbon dots is strongly quenched when they contact either semiconductive or conductive nanotubes, indicating a strong electronic coupling to both. Theoretical simulations predict a favo…