Search results for " Air"
showing 10 items of 703 documents
A Short Review of Simple Analytical Methods for the Evaluation of PAHs and PAEs as Indoor Pollutants in House Dust Samples
2022
Studies on indoor air quality are indispensable when considering that people spend approximately 85% of their time in confined environments. This short review mostly takes into consideration research that uses passive samplers to evaluate the quality of indoor environments (houses, school, cars, etc.). This short review summarizes most analytical methods to detect and quantify PAHs and PAEs in house dust used as a passive sampler. The objective of house dust analysis is to identify the presence, amount and distribution of specific hazardous substances in confined spaces and, if possible, to identify their sources. Household dust and the compounds present in it can enter the human body by in…
Novel Porous Carbon Material for the Detection of Traces of Volatile Organic Compounds in Indoor Air
2021
International audience; A highly sensitive and selective silicon-based microanalytical prototype was used to identify a few ppb of volatile organic compounds (VOCs) in indoor air. Herein, a new nonactivated tannin-derived carbon synthesized by an environmentally friendly method, DM2C, a MIL-101(Cr) MOF, and a DaY zeolite were selected for the preconcentration of BTEX compounds (i.e., benzene, toluene, ethylbenzene, and xylenes). Integrating a small amount of these nanoporous solids inside a miniaturized preconcentration unit led to excellent preconcentration performance. By taking advantage of the high adsorption−desorption capacities of the DM2C adsorbent, concentrations as low as 23.5, 30…
Ārstēšanas aspekti bērnu vecuma pacientiem ar zarnu invagināciju
2016
Problēmas būtība. Zarnu invaginācija ir visbiežākais zarnu obstrukcijas iemesls bērniem vecumā no trīs mēnešiem līdz trīs gadiem (Bode, 2008). Neskatoties uz zinātnisko publikāciju klāstu, kas veltīts zarnu invagināciju izpētei, joprojām nav vienotu rekomendāciju par ārstēšanas pielietošanu. Pētījuma mērķi. 1) Literatūras apskates analīze. 2) Analizēt BKUS diagnostikas un ārstēšanas taktiku (rezultātus) pacientiem ar zarnu invagināciju laika posmā no 2006. gada janvāra līdz 2015. gada decembrim. 3) Salīdzināt iegūtos rezultātus ar pasaules literatūras datiem. Darba metode. Pēdējo piecu gadu literatūras atlase, izmantojot medicīnas literatūras datubāzes pēc atslēgas vārdiem. Retrospektīvs pē…
Kokemuksia kokonaisuudesta : tutkielma kehollisuuden ja maailmankatsomuksen suhteesta buenosairesilaisten joogaavien katolisten keskuudessa
2010
Tutkielma käsittelee kehollisuuden ja henkisyyden suhdetta kymmenen buenosairesilaisen joogaavan katolisen elämässä. Keskeisin tutkimuskysymys on, miten informantit merkityksellistävät omaa elämäänsä joogan ja katolilaisuuden kautta, ja millä tavalla nuo merkitykset kohtaavat yksilön maailmankatsomuksessa. Lähestymistapoina toimivat sekä symboli- että kehoantropologia. Symboliselta kannalta yksilö nähdään aktiivisena merkityksentuottajana, joka tulkitsee ja uudelleentulkitsee kokemuksiaan, ihmissuhteitaan ja elämäntapahtumiaan. Kehollinen paradigma muistuttaa kehollisuuden olevan aina osa kokevaa subjektia: kehollisuutta ei voi ottaa kulttuurintutkimuksen ulkoiseksi kohteeksi sen ollessa yk…
Patērētāju attieksmi un izvēli ietekmējošie faktori: zīmolu airBaltic, Ryanair, Wizz Air gadījumu analīze
2018
Bakalaura darba tēma ir “Patērētāju attieksmi un izvēli ietekmējošie faktori: zīmolu airBaltic, Ryanair, Wizz Air gadījumu analīze”. Darba pētniecības mērķis ir noskaidrot patērētāju attieksmi un izvēli ietekmējošos faktorus, izvēloties zīmolu airBaltic, Ryanair un Wizz Air pakalpojumus. Darba teorētiskā daļa sastāv no teorijām par zīmolu un to komunikāciju, sociālo mediju ietekmi uz zīmola komunikāciju un patērētāju uzvedības pamatiem. Empīrisko daļu veido kontentanalīzes, anketu un fokusgrupu analīze. Darbs sastāv no trim daļām: teorētiskā pamatojuma, izstrādātas pētījuma metodoloģijas un empīriskās daļas. Pēc iegūtajiem rezultātiem var secināt, ka noteicošais faktors aviokompāniju pakalp…
Rail and Joint Bar (Fish Plate) NDE Advances in North America
2010
Improvement and development of rail track nondestructive inspection (NDI) technologies to reduce in-service failures of rail and joint bars (fish plates) in a continuous effort to make rail transport safer is a primary focus for the railroad industry. Researchers at The Transportation Technology Center, Inc., working under the direction of the Association of American Railroads and its Strategic Research Initiative Program, have worked with companies worldwide to develop novel NDI approaches for dynamic inspection of rail and joint bars. In the area of rail inspection an ultrasonic rail (U-Rail) system for noncontact rail flaw inspection has been developed. This system combines high energy l…
RPAS AND TLS TECNIQUES FOR ARCHAEOLOGICAL SURVEY: THE CASE STUDY OF THE ARCHAEOLOGICAL SITE OF ERACLEA MINOA (ITALY)
2018
Abstract. Digital documentation and 3D modelling of archaeological sites are important for understanding, definition and recognition of the values of the sites and of the archaeological finds. The most part of archaeological sites are outdoor location, but a cover to preserve the ruins protects often parts of the sites. The possibility to acquire data with different techniques and merge them by using a single reference system allows creating multi-parties models in which 3D representations of the individual objects can be inserted. The paper presents the results of a recent study carried out by Geomatics Laboratory of University of Palermo for the digital documentation and 3D modelling of E…
Hygrothermal conditions in Cross Laminated Timber (CLT) dwellings
2020
The use of CLT has been increasing the last decade, and a subsequently focus on documentation of the accompanying indoor climate and exposed wooden surfaces on human well-being. This study presents the results of a measurement campaign conducted over one year of a CLT apartment building in Grimstad, Norway. The apartment building consists of three floors with 35 apartments and comply with the Norwegian passive house standard and energy grade A. Measurements of the relative humidity (RH), indoor air temperature and wood moisture content (MC) were performed in the exposed CLT spruce panels in three apartments in two different floors. The results from the three apartments show a relatively sma…
Thermodynamic correction of particle concentrations measured by underwing probes on fast-flying aircraft
2016
Particle concentration measurements with underwing probes on aircraft are impacted by air compression upstream of the instrument body as a function of flight velocity. In particular, for fast-flying aircraft the necessity arises to account for compression of the air sample volume. Hence, a correction procedure is needed to invert measured particle number concentrations to ambient conditions that is commonly applicable to different instruments to gain comparable results. In the compression region where the detection of particles occurs (i.e. under factual measurement conditions), pressure and temperature of the air sample are increased compared to ambient (undisturbed) conditions in certain …
Corporate storytelling and the idea of Latin America
2021
The aim of this article is contributing to a great variety of theoretical perspectives and empirical settings to generate cumulative evidence about the influence of historical legacies and organisational ability for managing the past. In a continuation of critical perspectives that challenges the dominance of Anglo-Saxon onto-epistemologies in management and organisation studies (MOS), we conducted an empirical study on a multinational airline company whose past successes depended on the North/South, Anglo/Latin American borderlands. We analysed the grand narratives of Pan American Airways' (PAA) corporate archival material to determine its dominant discourses about people from Latin Americ…