Search results for "NTD"
showing 9 items of 19 documents
Electrochemical production and use of chlorinated oxidants for the treatment of wastewater contaminated by organic pollutants and disinfection
2021
Abstract In the last years, an increasing attention has been devoted to the use of electrogenerated chlorinated oxidants for the treatment of wastewater polluted by recalcitrant organics and/or for the disinfection of water contaminated by pathogen microorganisms. In this review, more recent and relevant findings were presented and critically discussed. The main advantages and disadvantages of this technique were commented, including the potential formation of toxic chlorinated organic specie and of chlorate and perchlorate or the difficult selection of proper operative parameters, as well as the key points that should be addressed to enhance the use on an applicative scale.
Incoherent elastic and quasi-elastic neutron scattering investigation of hemoglobin dynamics.
2005
In this work we investigate the dynamic properties of hemoglobin in glycerolD(8)/D(2)O solution using incoherent elastic (ENS) and quasi-elastic (QENS) neutron scattering. Taking advantage of complementary energy resolutions of backscattering spectrometers at ILL (Grenoble), we explore motions in a large space-time window, up to 1 ns and 14 A; moreover, in order to cover the harmonic and anharmonic protein dynamics regimes, the elastic experiments have been performed over the wide temperature interval of 20-300 K. To study the dependence of the measured dynamics upon the protein quaternary structure, both deoxyhemoglobin (in T quaternary conformation) and carbonmonoxyhemoglobin (in R quater…
X-Ray microcalorimeter detectors - Technology developments for high energy astrophysics space missions
2020
Improvements in the design, fabrication, and performance of astronomical detectors has ushered in the so-called era of multi messenger astrophysics, in which several different signals (electromagnetic waves, gravitational waves, neutrinos, cosmic rays) are processed to obtain detailed descriptions of their sources. Soft x-ray instrumentation has been developed in the last decades and used on board numerous space missions. This has allowed a deep understanding of several physical phenomena taking place in astrophysical sources of different scales from normal stars to galaxy clusters and huge black holes. On the other hand, imaging and spectral capabilities in the the hard x-rays are still la…
Fabrication of Electrical Contacts on Pyramid-Shaped NTD-Ge Microcalorimeters Using Free-Standing Shadow Masks
2011
In our effort to fabricate arrays of germanium microcalorimeters for X-ray detection, a truncated square-based pyramid shape has been identified as a suitable geometry for the sensors. It allows to obtain a uniform current spreading across each sensor, and represents a good compromise between having a large support area for the radiation absorber and for maintaining an overall small bolometer volume. This three-dimensional geometry, however, does not allow to create the electrical contacts for the sensors using a regular photoresist-based lift-off metallization process. In this paper we show how to deposit metal contacts on the lateral faces of the pyramidal sensors by metal evaporation thr…
Capacity-based calculation of passenger car equivalents using traffic simulation at double-lane roundabouts
2018
Abstract Calculation of passenger car equivalents for heavy vehicles represents the starting point for the operational analysis of road facilities and other traffic management applications. This paper introduces a criterion to find the passenger car equivalents that reflect traffic conditions at double-lane roundabouts, where the capacity is typically estimated for each entry lane. Based on the equivalence defined by the proportion of capacity used by vehicles of different classes, the criterion implies a comparison between the capacity that would occur with a traffic demand of passenger cars only and the capacity reached beginning from a demand with a certain percentage of heavy vehicles. …
B-MINE, the balloon-borne microcalorimeter nuclear line explorer
2001
B-MINE is a concept for a balloon mission designed to probe the deepest regions of a supernova explosion by detecting Ti-44 emission at 68 keV with spatial and spectral resolutions that are sufficient to determine the extent and velocity distribution of the Ti-44 emitting region. The payload introduces the concept of focusing optics and microcalorimeter spectroscopy to nuclear line emission astrophysics. B-MINE has a thin, plastic foil telescope multilayered to maximize the reflectivity in a 20 keV band centered at 68 keV and a microcalorimeter array optimized for the same energy band. This combination provides a reduced background, an energy resolution of 50 eV and a 3sigma sensitivity in …
Electroplated Indium Bumps as Thermal and Electrical Connections of NTD-Ge Sensors for the Fabrication of Microcalorimeter Arrays
2012
We are developing a method to build arrays of Ge-based microcalorimeters for soft X-rays detection using micro-photolithographic techniques. A key element of the process is the electrical and thermal connection between the germanium sensors and the interconnection electrical tracks, that lay on a substrate acting as mechanical support and thermal sink. The geometry of the sensors, that have a square base truncated pyramid shape, makes feasible a connection through indium soldering. We describe a technique, based on microlithography and electroplating, adopted to grow indium bumps of a few tens of square microns of area and several microns high on top of the contact pads patterned on the sub…
Projekts: Uzņēmuma SIA "RN Meistars" dibināšana
2020
Maģistra darbā “Projekts: Uzņēmuma SIA “RN Meistars” dibināšana” ir aprakstīts plāns kā izveidot uzņēmumu, kas nodarbosies ar nelieliem remonta darbiem un mājsaimniecības sadzīves problēmu risināšanu.Uzņēmuma darbība tiek attiecināta pie būvniecības nozares – būvdarbu pabeigšana un citi specializētie būvdarbi. Uzņēmums SIA “RN Meistars” sniegs saviem klientiem nelielu remontdarbu pakalpojumus tautā vairāk zināmus ka “mājas meistars” pakalpojumus. Uzņēmums saviem klientiem piedāvās tāda veida pakalpojumus kā: Santehnikas darbus,elektrības darbus,remonta kosmētiskie darbus,galdniecības remonta darbus, mēbeļu salikšanas un uzstādīšanas darbus utt.
Dzīvokļu īpašumos nesadalītas daudzdzīvokļu mājas remontdarbu veikšanas problemātika.
2021
Autors, izstrādājot bakalaura darbu “Dzīvokļu īpašumos nesadalītas daudzdzīvokļu mājas remontdarbu veikšanas problemātika”, ir veicis šobrīd spēka esošā normatīvā regulējuma salīdzinājumu, kāds tiek piemērots remontdarbu veikšanai dzīvokļos un arī dzīvokļu īpašumos nesadalītas daudzdzīvokļu mājas remontdarbu - pārbūves un restaurācijas - veikšanai. Bakalaura darba mērķis ir apskatīt kas ir dzīvokļa īpašums, kas ir dzīvokļu īpašumos sadalīta daudzdzīvokļu māja, kas ir dzīvokļu īpašumos nesadalīta daudzdzīvokļu māja, iemesli dzīvokļu īpašumos nesadalītas mājas institūta pastāvēšanai, kā var tikt pieņemt lēmums dzīvokļu īpašumos nesadalītā mājā remontdarbu veikšanai dzīvoklī un arī saistībā ar…