Search results for "tilt"
showing 10 items of 124 documents
The extensional Messaria shear zone and associated brittle detachment faults, Aegean Sea, Greece
2005
Structural, thermochronological and metamorphic data are used to elucidate the tectonic nature and evolution of the ductile extensional Messaria shear zone and the associated brittle Messaria and Fanari detachment faults, which exhumed their footwall from mid-crustal depths on the island of Ikaria in the Aegean. Thermobarometric data indicate that the Messaria shear zone formed at 350–>400 °C and 3–4 kbar (i.e. at a depth of c . 15 km). Normal faulting was accompanied by the intrusion of two granites, which together with the thermobarometric data indicate a relatively high thermal field gradient of 25–35 °C km −1 . Zircon and apatite fission-track and apatite (U–Th)/He ages demonstrate rapi…
Cardiovascular and respiratory variability during orthostatic and mental stress: A comparison of entropy estimators
2017
The aim of this study is to characterize cardiovascular and respiratory signals during orthostatic and mental stress as reflected in indices of entropy and complexity, providing a comparison between the performance of different estimators. To this end, the heart rate variability, systolic blood pressure, diastolic blood pressure and respiration time series were extracted from the recordings of 61 healthy volunteers undergoing a protocol consisting of supine rest, head-up tilt test and mental arithmetic task. The analysis was performed in the information domain using measures of entropy and conditional entropy, estimated through model-based (linear) and model-free (binning, nearest neighbor)…
Disentangling cardiovascular control mechanisms during head-down tilt via joint transfer entropy and self-entropy decompositions
2015
A full decomposition of the predictive entropy (PE) of the spontaneous variations of the heart period (HP) given systolic arterial pressure (SAP) and respiration (R) is proposed. The PE of HP is decomposed into the joint transfer entropy (JTE) from SAP and R to HP and self-entropy (SE) of HP. The SE is the sum of three terms quantifying the synergistic/redundant contributions of HP and SAP, when taken individually and jointly, to SE and one term conditioned on HP and SAP denoted as the conditional SE (CSE) of HP given SAP and R. The JTE from SAP and R to HP is the sum of two terms attributable to SAP or R plus an extra term describing the redundant/synergistic contribution to the JTE. All q…
Particle Filtering for Tracking in 360 Degrees Videos Using Virtual PTZ Cameras
2019
360 degrees cameras are devices able to record spherical images of the environment. Such images can be used to generate views of the scene by projecting the spherical surface onto planes tangent to the sphere. Each of these views can be considered as the output of a virtual PTZ (vPTZ) camera with specific pan, tilt and zoom parameters. This paper proposes to formulate the visual tracking problem as the one of selecting, at each time, the vPTZ camera to foveate on the target from the unlimited set of simultaneously generated vPTZ camera views. Assuming that the selected vPTZ camera is a stochastic variable, the paper proposes to model the posterior distribution of the underlying stochastic p…
Tiopurīna metiltransferāzes fenotipa analīze pacientiem ar iekaisīgām zarnu slimībām
2018
Lai izvērtētu pacientu atbilstību tiopurīnu grupas medikamentu terapijai, ir iespējams veikt TPMT aktivitāti novērtējošas analīzes. Pētījuma mērķis ir pētīt Latvijā jaunas laboratoriskās diagnostikas metodes - tiopurīna metiltransferāzes aktivitātes noteikšanas asinīs – pielietošanas iespējas un nepieciešamību pacientiem ar iekaisīgām zarnu slimībām, kuri stacionēti Paula Stradiņa Klīniskās universitātes slimnīcā. Izvirzīta hipotēze, ka aptuveni 3-14% pacientu pētījumu grupā varētu būt samazināta TPMT aktivitāte. Pētījumā iekļauti dati par astoņiem pacientiem, kas ir vecāki par 18 gadiem un no kuriem 40% ir sievietes (n=3) un 60% vīrieši (n=5). Rezultāti: No astoņiem darbā iekļautajiem paci…
Tiopurīna metiltransferāzes genotipa un fenotipa saistība ar tiopurīnu blakusparādībām pacientiem ar iekaisīgām zarnu slimībām
2019
Ievads. Tiopurīna metiltransferāze (TPMT) ir enzīms, kurš piedalās tiopurīnu metabolismā. Skaitās, ka TPMT genotipa un fenotipa noteikšana ļauj atklāt pacientus, kuri ir pakļauti mielosupresijas riskam tiopurīnu terapijas gadījumā. Latvijā TPMT testēšana ir jauna metode. Neskatoties uz vairākiem pētījumiem par TPMT testēšanas efektivitāti, joprojām pastāv bažas par TPMT testēšanas nepieciešamību. Darba mērķis. Noteikt TPMT genotipa un fenotipa saistību ar tiopurīnu blakusparādībām pacientiem ar iekaisīgām zarnu slimībām (IZS). Materiāli un metodes. Prospektīvā pētījumā iekļauti 59 iekaisīgo zarnu slimību pacienti vecumā no 18 līdz 77 gadiem, kuri ārstējās Paula Stradiņa Klīniskās universitā…
5-Metiltio-2,6-diazabiciklo[2.2.2]oktān-5-ēn-3-ona un 3,5-bismetiltio-2,6-diazabiciklo[2.2.2]oktēn-3,5-diēna atvasinājumu sintēze
2021
5-metiltio-2,6-diazabiciklo[2.2.2]oktān-5-ēn-3-onu un 3,5-(bismetiltio)-2,6-diazabiciklo[2.2.2]oktān-3,5-diēnu sintēze. Freimanis T., zinātniskais vadītājs Dr. Chem., vadošais pētnieks Žalubovskis R.. Bakalaura darbs. 41 lappuse, 4 attēli, 15 tabulas, 14 literatūras avoti. Latviešu valodā Darbā ir veikta 5-metiltio-2,6-diazabiciklo[2.2.2]oktān-5-ēn-3-onu un 3,5-(bismetiltio)-2,6-diazabiciklo[2.2.2]oktān-3,5-diēnu sintēze trīs stadijās. Pirmajā stadijā tiek sintezēta virkne 1-alkil-8-aril-2,6-diazabiciklooktān-3,5-dionu atvasinājumu ar dažādiem alkil un arilaizvietotājiem pie bicikla C-1 un C-8 atomiem respektīvi. 2.stadijā tiek apskatīta sulfurilēšanas iespējas un 3.stadijā tiek veidoti S-m…
Progression of transthyretin (TTR) amyloidosis in donors and recipients after domino liver transplantation-a prospective single-center cohort study
2018
Liver transplantation (LT) is the first-line therapy in patients with transthyretin (TTR) amyloidosis and progressive familial amyloid polyneuropathy (FAP). Explanted organs from these patients can be used for domino liver transplantation (DLT). After DLT, de novo amyloidosis may develop in domino recipients (DR). Data were collected prospectively in a transplant database. Electroneurography by nerve conduction velocity (NCV), quantitative sensory testing, heart rate variability (HRV), sympathetic skin response, orthostatic reaction (tilt table test), transthoracic echocardiography, cardiac MRI and organ biopsy results were evaluated. The cohort included 24 FAP- (11 Val30Met, 13 nonVal30Met…
N-Acetilglutamato sintasa : correlaciones estructura-función
2013
La N–acetilglutamato sintasa (NAGS) cataliza la formación del N-acetilglutamato (NAG) usando como sustratos glutamato y acetil-CoA. En microorganismos y plantas, esta reacción es el primer paso de la ruta de biosíntesis de la arginina, mientras que, en animales, está implicada en el control del ciclo de la urea, ya que el NAG es un activador esencial de la carbamilfosfato sintetasa I encargada de la formación del carbamilfosfato, intermedio en el ciclo de la urea. En humanos, la deficiencia de NAGS produce hiperamonemia y, desde 2002, año en el que el gen de la NAGS humana fue identificado, varias mutaciones han sido publicadas. Esta tesis trata, principalmente, de la NAGS bacteriana clásic…
Pedagogisk- psykologisk tjeneste (PPT) og barn og unges psykiske helse i grunnskolen : hvordan opplever og forholder PPT seg til barn og unges psykis…
2014
Background: This project has become as a result of my work in mental hospital for adults, where my experience is that many adults who have had traumatic experiences in early years of life have got reduced quality of life as grownups. My question has been: “who is able to identify children and young people with mental challenges in early years of life?” Objective: The aim of this study has been to get knowledge about which challenges pedagogical- psychological services (PPT) face, and how they help and which experiences the consultants have about children and young people`s mental health. This has lead to the research question: “How experience and in what way does PPT relate to children and …