Search results for "Glas"
showing 10 items of 1259 documents
Saturation and forward jets in proton-lead collisions at the LHC
2019
We investigate the forward-jet energy spectrum within the Color Glass Condensate framework at 5 TeV center-of-mass energy. In particular, we focus on the kinematic range covered by the CMS-CASTOR calorimeter. We show that our saturation-model calculations are compatible with the CASTOR measurements and that to optimally reproduce the data, effects of multi-parton interactions need to be included. We predict a significant nuclear suppression - reaching down to 50% at the lowest considered jet energies $E_{\rm jet} \sim 500 \, {\rm GeV}$.
Recykling odpadów z szyb samochodowych i szkła budowalnego z folią PVB
2016
Dokonano analizy możliwości wykorzystania odpadów z szyb samochodowych klejonych oraz bezpiecznego szkła budowlanego z folią PVB. Aktualnie najczęściej stosowaną folią w szkle klejonym jest folia poliwinylobutyralu (PVB). Niniejsza praca przedstawia analizę możliwości odzyskania surowców w postaci folii PVB i szkła z odpadów szyb klejonych. Analizowana metoda polega na rozpuszczeniu folii PVB oraz separacji folii od kawałków szkła. Przedstawiono również możliwości zastosowania rozpuszczonej folii PVB, a szkła jako wsadu surowcowego w hutach szkła.
Optical Absorption of Excimer Laser‐Induced Dichlorine Monoxide in Silica Glass and Excitation of Singlet Oxygen Luminescence by Energy Transfer from…
2021
An optical absorption (OA) band of interstitial dichlorine monoxide molecules with peak at 4.7 eV and halfwidth 0.94 eV is identified in F2 laser - irradiated (photon energy=7.9 eV) synthetic silica glass bearing both interstitial O2 and Cl2 molecules. Alongside with intrinsic defects, this OA band can contribute to solarization of silica glasses produced from SiCl4. While the formation of ClClO is confirmed by its Raman signature, its structural isomer ClOCl may also contribute to this induced OA band. Thermal destruction of this band between 300C and 400C almost completely restores the pre-irradiation concentration of interstitial Cl2. An additional weak OA band at 3.5 eV is tentatively a…
Near‐IR Radiation‐Induced Attenuation of Aluminosilicate Optical Fibers
2021
The X-ray radiation-induced attenuation (RIA) growth kinetics are studied online in different single-mode aluminosilicate optical fibers in the near-IR (NIR) domain to evaluate their potential in terms of dosimetry. The optical fibers differ by Al contents, core sizes, drawing parameters, and also by a preform deposition process. The data show no dependence of the RIA on all these parameters, a positive result for the design of point or distributed radiation detectors exploiting RIA to monitor the dose. The RIA growth rate is unchanged for dose rates changing from 0.073 to 6.25 Gy(SiO2) s−1, and the RIA linearly increases with the dose up to 2 kGy(SiO2). Small but noticeable RIA changes are…
Properties of Gd-Doped Sol-Gel Silica Glass Radioluminescence under Electron Beams
2022
International audience; The radiation-induced emission (RIE) of Gd3+-doped sol–gel silica glass has been shown to have suitable properties for use in the dosimetry of beams of ionizing radiation in applications such as radiotherapy. Linear electron accelerators are commonly used as clinical radiotherapy beams, and in this paper, the RIE properties were investigated under electron irradiation. A monochromator setup was used to investigate the light properties in selected narrow wavelength regions, and a spectrometer setup was used to measure the optical emission spectra in various test configurations. The RIE output as a function of depth in acrylic was measured and compared with a reference…
Synthesis and Holographic Properties of Alkyl 2-Cyanoacetate Acceptor Fragment Containing Push – Pull Type Organic Glasses
2015
We present synthesis, optical and holographic properties of original structure organic glasses based on compounds consisting of three fragments: of N,N-bis(2-(trityloxy)ethyl)-4-vinylaniline or N,N-bis(5,5,5-triphenylpentyl)-4-vinylaniline fragments as electron donating fragment (D), 4H-pyran-4-ylidene fragment as linker(π) and of 2-(trityloxy)ethyl 2-cyanoacetate or 5,5,5-triphenylpentyl 2-cyanoacetate as acceptor (A) fragment. These push-pull (D- π-A) type molecular compounds show good solubility in non-polar solvents (CHCl3 or CH2Cl2) and neat thin films with sufficient optical qualities have been obtained by spin-coating technique. Maxima of UV–VIS absorption in dichloromethane solution…
Goodbye Lenin : Neuvostoliiton hajoamisen käsittely ja kylmän sodan jälkeisen maailman spekulointi Yhdysvaltain mediassa 1987-1991
2011
Tässä tutkielmassa kuvaan, miten Yhdysvaltain media reagoi Neuvostoliiton muutosprosessiin ja hajoamiseen vuosina 1987-1991, jolloin Neuvostoliitossa oli käynnissä Mihail Gorbatshovin ajama uudistuspolitiikka. Tutkielmassa käytetyt lehdet edustavat Yhdysvaltain valtamediaa: New York Times, Washington Post sekä Newsweek. Metodina on käytetty historiallis-kvalitatiivista lähilukumenetelmää. Tutkimuksessa on vertailtu sisällöllisiä yhteneväisyyksiä ja eroavaisuuksia. Tutkitut tekstityypit ovat kolumneja, pääkirjoituksia sekä taustoittavia uutisreportaaseja. Neuvostoliiton Kommunistisen puolueen pääsihteeri Mihail Gorbatshov pyrki uudistus- ja avoimuuspolitiikallaan elvyttämään sosialismin heik…
Nürnbergin psykiatri pahuuden olemusta etsimässä
2020
Sodan jälkeen liittoutuneiden vangeiksi jääneet natsijohtajat kiinnostivat suuren yleisön ohella psyyken asiantuntijoita, jotka pyrkivät selvittämään pahuuden olemusta. Teos kertoo mielenkiintoisen ja dramaattisen tarinan korkea-arvoisia natseja tutkineesta psykiatrista, joka ei lopulta ollutkaan niin erilainen kuin tutkimuksensa kohteet. nonPeerReviewed
Toward Sustainable PLA-Based Multilayer Complexes with Improved Barrier Properties
2019
Poly(lactic acid) or PLA is currently considered as one of the most promising substitutes of conventional plastics, with low environmental impact, especially for food packaging applications. Nevertheless, some drawbacks, such as high permeability to oxygen, are still limiting its industrial applications. The objective of this study was to highly increase the oxygen barrier performance of PLA without compromising its sustainable nature and following the principles of circular economy perspective. Coproducts coming from mill industries, such as wheat gluten proteins (WG), were used to produce PLA-WG-PLA multilayer complexes with improved barrier performance. Different technologies of industri…
Non-conventional synthesis and photophysical studies of platinum(ii) complexes with methylene bridged 2,2′-dipyridylamine derivatives
2019
Methylene bridged 2,2′-dipyridylamine (dpa) derivatives and their metal complexes possess outstanding properties due to their inherent structural flexibility. Synthesis of such complexes typically involves derivatization of dpa followed by coordination on metals, and may not always be very efficient. In this work, an alternative synthetic approach, involving the derivatization step after – rather than prior to – coordination of dpa on metal center, is proposed and applied to synthesis of a number of platinum(II) complexes with substituted benzyldi(2-pyridyl)amines. Comparison with the more conventional synthetic route reveals greater efficiency and versatility of the proposed approach. The …