Search results for "abs"
showing 10 items of 6504 documents
Spectroscopic characterization of alkaline earth uranyl carbonates
2005
A series of alkaline uranyl carbonates, M[UO{sub 2}(CO{sub 3}){sub 3}].nH{sub 2}O (M=Mg{sub 2}, Ca{sub 2}, Sr{sub 2}, Ba{sub 2}, Na{sub 2}Ca, and CaMg) was synthesized and characterized by inductively coupled plasma mass spectrometry (ICP-MS) and atomic absorption spectrometry (AAS) after nitric acid digestion, X-ray powder diffraction (XRD), and thermal analysis (TGA/DTA). The molecular structure of these compounds was characterized by extended X-ray absorption fine-structure (EXAFS) spectroscopy and X-ray photoelectron spectroscopy (XPS). Crystalline Ba{sub 2}[UO{sub 2}(CO{sub 3}){sub 3}].6H{sub 2}O was obtained for the first time. The EXAFS analysis showed that this compound consists of …
Dažādu mikroorganismu adhēziju eksperimentāls pētījums, izmantojot silīcija dioksīda mikrodaļiņas
2018
Ievads: Katru gadu parādās jaunas tehnoloģijas un jaunas metodes mikroorganismu diagnostikā un diferencēšanā. Zinātnei attīstoties, šīs metodes kļūst arvien ātrākas un precīzākas. Precīza un ātra mikroorganismu noteikšana ir ļoti svarīga mūsdienu medicīnā, lai varētu efektīvi izvēlēties empīrisko terapiju un mērķterapiju. Pētījuma mērķis: Pētījuma mērķis ir noskaidrot, vai spektrofotometrija ir efektīvs un ātrs veids kā atšķirt mikroorganismus. Materiāli un metodes: Tika veikts prospektīvs pētījums, kura laikā ar spektrofotometru tika analizētas 4 sēnītes, 5 Gram pozitīvas baktērijas un 8 Gram negatīvas baktērijas ar un bez silīcija dioksīda mikrodaļiņām. Spektrofotometra izmērītās absorbci…
Photodynamics studies of ligand-protected gold nanoclusters by using ultrafast transient infrared spectroscopy
2015
Highly monodisperse samples of three ligand-protected gold nanoclusters Au102(pMBA)44, Au144(SC2H4Ph)60, and a cluster tentatively identified as Au130(pMBA)50, were characterized by UV/vis and infrared spectroscopy, and their photodynamics was studied by transient absorption spectroscopy. The dynamics study for each cluster was performed by electronically exciting the cluster with a pump pulse in the visible or near infrared region and by monitoring the transient absorption of vibrational modes of the ligands with a mid-IR probe pulse. The photodynamics studies were used to determine the molecular or metallic behavior of the cluster, and also to gain important size dependent information abo…
Total absorption γ -ray spectroscopy of niobium isomers
2019
15 pags. 17 figs., 5 tabs.
Spectral analysis of the dipping LMXB system XB 1916-053
2019
Context: XB 1916-053 is a low mass X-ray binary system (LMXB) hosting a neutron star (NS) and showing periodic dips. The spectrum of the persistent emission was modeled with a blackbody component having a temperature between 1.31 and 1.67 keV and with a Comptonization component with an electron temperature of 9.4 keV and a photon index $\Gamma$ between 2.5 and 2.9. The presence of absorption features associated with highly ionized elements suggested the presence of partially ionized plasma in the system. Aims: In this work we performed a study of the spectrum of XB 1916-053, which aims to shed light on the nature of the seed photons that contribute to the Comptonization component. Methods: …
Stability of stochastic nonlinear systems with state-dependent switching
2013
In this paper, the problem of stability on stochastic systems with state-dependent switching is investigated. To analyze properties of the switched system by means of Itô’s formula and Dynkin’s formula, it is critical to show switching instants being stopping times. When the given active-region set can be replaced by its interior, the local solution of the switched system is constructed by defining a series of stopping times as switching instants, and the criteria on global existence and stability of solution are presented by Lyapunov approach. For the case where the active-region set can not be replaced by its interior, the switched systems do not necessarily have solutions, thereby quasi-…
Inter-annotator agreement in spoken language annotation: Applying uα-family coefficients to discourse segmentation
2021
As databases make Corpus Linguistics a common tool for most linguists, corpus annotation becomes an increasingly important process. Corpus users do not need only raw data, but also annotated data, submitted to tagging or parsing processes through annotation protocols. One problem with corpus annotation lies in its reliability, that is, in the probability that its results can be replicable by independent researchers. Inter-annotation agreement (IAA) is the process which evaluates the probability that, applying the same protocol, different annotators reach similar results. To measure agreement, different statistical metrics are used. This study applies IAA for the first time to the Valencia E…
El trabajo del espíritu. Hegel y la Modernidad [Prefaci]
2001
Los ensayos que se reúnen en este libro abordan diferentes aspectos del idealismo de Hegel, con el propósito de presentar su proyecto filosófico como un cierre de algunos problemas metafísicos y epistemológicos recibidos de la tradición filosófica de la Modernidad, entre los cuales se incluyen: la constitución del saber experiencial como síntesis dialéctica de certeza y verdad, la superación de la oposición sujeto-objeto planteada por las filosofías de la conciencia, la conceptualización de la totalidad absoluta como sujeto, la unificación de razón y realidad más allá de los enfoques criticistas, y la síntesis de causalidad y teleología en la concepción especulativa de la naturaleza.
Niewykonanie kary ograniczenia wolności a zastępcza kara pozbawienia wolności
2021
Artykuł odnosi się do ostatniego etapu wykonawczego kary ograniczenia wolności w przypadku jej niewykonania przez skazanego na nią sprawcę przestępstwa w kontekście orzeczenia wobec niego zastępczej kary pozbawienia wolności. Autor dokonuje analizy i oceny zakończenia postępowania w zakresie kary ograniczenia wolności na skutek orzeczenia i wykonania kary zastępczej z uwagi na niepozytywne zakończenie wykonania kary ograniczenia wolności przez skazanych. W szczególności omawia jako najdalej idące alternatywne prawnie dopuszczalne rozwiązanie modyfikujące rodzaj orzeczonej pierwotnie kary i jej wymiar wymierzonej w orzeczeniu końcowym, wobec określonego sprawcy czynu zabronionego. Autor doko…
A Randomized Controlled Trial Protocol for Using an Accelerometer-Smartphone Application Intervention to Increase Physical Activity and Improve Healt…
2021
Physical activity is beneficial for improving health and reducing sick leave absences. This article describes a protocol for an intervention using an interactive accelerometer smartphone application, telephone counselling, and physical activity recordings to increase the physical activity of workers in the military and improve their health. Under the protocol, employees from six military brigades in Finland will be randomly assigned to intervention and control groups. The intervention group’s participants will use accelerometers to measure their daily physical activities and their quality of sleep for six months. They will receive feedback based on these measurements via a smartphone applic…