Search results for "gas [meson]"
showing 10 items of 409 documents
Visualization of alveolar recruitment in a porcine model of unilateral lung lavage using3He-MRI
2009
BACKGROUND: In the acute respiratory distress syndrome potentially recruitable lung volume is currently discussed. (3)He-magnetic resonance imaging ((3)He-MRI) offers the possibility to visualize alveolar recruitment directly. METHODS: With the approval of the state animal care committee, unilateral lung damage was induced in seven anesthetized pigs by saline lavage of the right lungs. The left lung served as an intraindividual control (healthy lung). Unilateral lung damage was confirmed by conventional proton MRI and spiral-CT scanning. The total aerated lung volume was determined both at a positive end-expiratory pressure (PEEP) of 0 and 10 mbar from three-dimensionally reconstructed (3)H…
Respiratory GAS Exchange and pO2- Distribution in Splenic Tissue
1973
Little attention has been paid to physiological aspects of O2 supply to splenic tissue. Studies are performed to examine the factors determining the supply conditions for the rabbit’s spleen, which has little reservoir function and, therefore, it is very similar to the human spleen. Previous studies on respiratory gas exchange, applying the arterial and spleno-venous blood gas values, have shown a mean arterio-venous O2-difference of 0.5 Vol.% (2). Taking into account a mean splenic blood flow of 110 ml/100g/min (12), the O2 consumption of splenic tissue amounts to 0.6 ml/100g/min.
Patstāvīgas mācīšanās prasmes un mājasdarbi sākumskolas 2.-3.klasē
2018
Jau izsenis mājasdarbi pedagoģiskajā procesā ir bijis strīdus ābols, jo par tiem nav vienota viedokļa. Pētījumi pierāda, ka mājasdarbu veikšanai ir gan pozitīvi (zināšanu nostiprināšana), gan negatīvi aspekti (zaudē laiku citām aktivitātēm). Akadēmiskie ieguvumi, veicot mājasdarbus, ir novērojami sākot no sākumskolas vecākajām klasēm. Mājasdarbi skolēniem palīdz attīstīt arī patstāvīgās mācīšanās prasmes. Pēc definīcijas mājasdarbs ir skolēna patstāvīgi veikts darbs ārpus mācību stundām, tomēr, ja skolēns nav apguvis prasmi mācīties pats, tas nav iespējams. Sākumskolā ir būtiski attīstīt šīs prasmes stundās ar dažādām metodēm un paņēmieniem, lai skolēni būtu sagatavoti, mērķtiecīgi un zināt…
Sociālā pedagoga sadarbība ar atbalsta personālu Kandavas internātskolā
2018
A. Guļevskas diplomdarba “Sociālā pedagoga sadarbība ar atbalsta personālu Kandavas internātskolā” mērķis ir sociālā pedagoga un atbalsta personāla sadarbības veicināšana priekšlaicīgas mācību pamešanas riska mazināšanai 5. līdz 8. klašu skolēniem. Teorētiskajā daļā autore analizē literatūru par atbalsta personāla darbību kā arī par skolas un vecāku sadarbību. Pētnieciskajā daļā tiek analizēta un raksturota konkrētās skolas atbalsta personāla darbība, un pētīts un raksturots skolas 1. – 9. klašu skolēnu sastāvs. Izveidoti individuāli priekšlaicīgas mācību pamešanas riska mazināšanas plāni piekto līdz astoto klašu skolniekiem. Veikts realizētās sociālpedagoģiskās darbības apraksts.
Percentile Study of chi Distribution. Application to Response Time Data.
2020
As a continuation of our previous work, where a Maxwell&ndash
Coseismic geochemical variations in some gas emissions of Umbria region (Central Italy)
2000
Abstract Coseismic geochemical variations have been detected in some gaseous vents and natural springs during the last seismic crisis occurred in Umbria region (Central Apennines), that started on September 26th, 1997 with several moderate earthquakes (up to M1 5.8). The results of chemical analyses performed on both gas and water samples taken at a weekly rate, combined with analyses on continuous gas flow rate nearby San Faustino site, suggest that the variations can be interpreted as possible consequence of the crustal permeability changes induced by earthquake shaking.
ZnO/polyaniline composite based photoluminescence sensor for the determination of acetic acid vapor
2020
In this study, we report a novel ZnO/polyaniline (PANI) nanocomposite optical gas sensor for the determination of acetic acid at room temperatures. ZnO nanorods, synthesized in powder form were coated by PANI (ZnO/ PANI) by chemical polymerization method. The obtained nanocomposites were deposited on glass substrate and dried overnight at room temperature. Structure and optical properties of ZnO/PANI nanocomposite have been studied by using X-ray diffraction, transmission electron microscopy, scanning electron microscopy, diffuse reflectance and photoluminescence spectroscopy. Tests towards acetic acids were performed in the range of concentrations 1–13 ppm. The adsorption of acetic a…
The ALICE Transition Radiation Detector: Construction, operation, and performance
2018
The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD also contributes significantly to the track reconstruction and calibration in the central barrel of ALICE. In this paper the design, construction, operation, and performance of this detector are discussed. A pion rejection factor of up to 410 is achieved at a momentum of 1 GeV/$c$ in p-Pb collisions and the resolution at high transverse momentum improves by about 40% when including the TRD information in track reconstruction. The triggering capability is demonstrated both …
The upgrade of the ALICE TPC with GEMs and continuous readout
2020
Journal of Instrumentation 16(03), P03022 (2021). doi:10.1088/1748-0221/16/03/P03022
Time performance of a triple-GEM detector at high rate
2020
Gaseous detectors are used in high energy physics as trackers or, more generally, as devices for the measurement of the particle position. For this reason, they must provide high spatial resolution and they have to be able to operate in regions of intense radiation, i.e. around the interaction point of collider machines. Among these, Micro Pattern Gaseous Detectors (MPGD) are the latest frontier and allow to overcome many limitations of the pre-existing detectors, such as the radiation tolerance and the rate capability. The gas Electron Multiplier (GEM) is a MPGD that exploits an intense electric field in a reduced amplification region in order to prevent discharges. Several amplification s…