Search results for "Instrument"
showing 10 items of 5652 documents
Piekrastes pārvaldības novērtējums un attīstības priekšlikumi Jūrmalas pilsētas pašvaldībā
2020
Piekrastes pārvaldība mūsdienās kļūst arvien aktuālāka, jo problēmas piekrastes teritorijās arvien vairāk pieaug gan klimata pasiltināšanās dēļ, gan arī dažādu citu faktoru ietekmē. Taču viena no problēmām ir tāda, ka piekrastes teritorija ir uzskatāma par ārkārtīgi grūti pārvaldāmu sistēmu, jo tā vienlaikus ir gan ļoti dinamiska zona, gan tai pat laikā arī ļoti jutīga pret dažādām antropogēnām ietekmēm, gan arī tāpēc, ka tā ir interešu konfliktu zona, kurai raksturīgs savdabīgs un daudzveidīgs dabas un kultūrvēsturiskais mantojums. Šādas sarežģītas sociāli-ekoloģiskas sistēmas pārvaldīšanā svarīga ir visaptveroša un integrēta pieeja. Maģistra darba „Piekrastes pārvaldības novērtējums un at…
Theoretical advancements on a recently proposed method to measure rainfall energy
2022
Soil erosion induced by rainfall is mainly due to the rainfall impact besides the consequent surface runoff. Rainfall kinetic energy is the most used variable to represent its erosivity. The latter represents the weathering attitude to erode soil and is a fundamental variable of the erosion process. Consequently, precise measurements of rainfall erosivity have to perform to develop a reliable prediction model of the erosive phenomenon. Currently, impact energy can be reliably measured only by disdrometers. These instruments measure the Drop Size Distribution (DSD) which, joined with the raindrop falling velocity, allow to calculate, by integration, the impact kinetic energy. However, disdro…
Sukupuolelleen epätyypillisen soitinvalinnan tehneiden tie musiikkiharrastuksen alusta ammattilaisiksi
2015
Tutkimuksen tarkoituksena oli selvittää aiempien tutkimusten valossa sukupuolelleen epätyypillisen soitinvalinnan tehneiden henkilöiden instrumenttivalinnan ja soittamisen motivaation syitä. Aiemmissa tutkimuksissa on todettu instrumenttien olevan sukupuolittuneita ja onkin esitetty instrumenttiin liitettävän maskuliinisen tai feminiinisen mielikuvan vaikuttavan jopa soitinvalintaan. Tässä tutkimuksessa haastattelin sukupuolelleen epätyypillisen soitinvalinnan tehneitä instrumentalisteja, jotka olivat jatkaneet soittamista aina ammattiopintoihin asti. Selvitin heidän instrumenttivalintansa syitä, soittomotivaatiotaan sekä kartoitin, miten he kokevat oman soittimensa mahdollisen sukupuolittu…
On-Orbit Degradation of Solar Instruments
2013
International audience; We present the lessons learned about the degradation observed in several space solar missions, based on contributions at the Workshop about On-Orbit Degradation of Solar and Space Weather Instruments that took place at the Solar Terrestrial Centre of Excellence (Royal Observatory of Belgium) in Brussels on 3 May 2012. The aim of this workshop was to open discussions related to the degradation observed in Sun-observing instruments exposed to the effects of the space environment. This article summarizes the various lessons learned and offers recommendations to reduce or correct expected degradation with the goal of increasing the useful lifespan of future and ongoing s…
miMic
2016
miMic, a sonic analogue of paper and pencil is proposed: An augmented microphone for vocal and gestural sonic sketching. Vocalizations are classified and interpreted as instances of sound models, which the user can play with by vocal and gestural control. The physical device is based on a modified microphone, with embedded inertial sensors and buttons. Sound models can be selected by vocal imitations that are automatically classified, and each model is mapped to vocal and gestural features for real-time control. With miMic, the sound designer can explore a vast sonic space and quickly produce expressive sonic sketches, which may be turned into sound prototypes by further adjustment of model…
The Gaia-ESO Public Spectroscopic Survey
2012
The Gaia-ESO Public Spectroscopic Survey has begun and will obtain high quality spectroscopy of some 100000 Milky Way stars, in the field and in open clusters, down to magnitude 19, systematically covering all the major components of the Milky Way. This survey will provide the first homogeneous overview of the distributions of kinematics and chemical element abundances in the Galaxy. The motivation, organisation and implementation of the Gaia-ESO Survey are described, emphasising the complementarity with the ESA Gaia mission. Spectra from the very first observing run of the survey are presented.
A concept for the extraction of the most refractory elements at CERN-ISOLDE as carbonyl complex ions
2021
The European physical journal / A 58(5), 94 (2022). doi:10.1140/epja/s10050-022-00739-1
Characterization of a CZT focal plane small prototype for hard X-ray telescope
2005
The promise of good energy and spatial resolution coupled with high efficiency and room temperature operation has fuelled a large international effort to develop cadmium zinc telluride (CZT) for hard X-ray applications. We are involved on the development of a hard X-ray telescope based on multilayer optics and focal plane detector operative in the 10-80 keV energy range. This telescope requires a high efficiency focal plane providing both fine spatial resolution and spectroscopy with a compact and robust design. This paper reports preliminary results on the characterization both in spectroscopic and spatial response of two small pixellated CZT detectors (10times10times1 mm3 and 10times10tim…
Trapped Ion Oscillation Frequencies as Sensors for Spectroscopy
2010
The oscillation frequencies of charged particles in a Penning trap can serve as sensors for spectroscopy when additional field components are introduced to the magnetic and electric fields used for confinement. The presence of so-called "magnetic bottles" and specific electric anharmonicities creates calculable energy-dependences of the oscillation frequencies in the radiofrequency domain which may be used to detect the absorption or emission of photons both in the microwave and optical frequency domains. The precise electronic measurement of these oscillation frequencies therefore represents an optical sensor for spectroscopy. We discuss possible applications for precision laser and microw…
Steroidal supramolecular metallogels
2020
The review deals with an expanding number of steroidal compounds that are capable of forming a metallogel providing a multitude of novel materials rich in their properties. The future of steroidal metallogels holds a myriad of potential applications as new intelligent materials. Detection of potentially harmful compounds without expensive instrumentation, entrapment of environmentally hazardous substances, and sensitive and selective nanomaterials represent only a few of these potential applications. This article reviews the design, synthesis, characterization, and applications of steroidal metallogels. peerReviewed