Search results for "Process"
showing 10 items of 22310 documents
Post-Transcriptional Regulation of Iron Homeostasis in Saccharomyces cerevisiae
2013
Iron is an essential micronutrient for all eukaryotic organisms because it participates as a redox cofactor in a wide variety of biological processes. Recent studies in Saccharomyces cerevisiae have shown that in response to iron deficiency, an RNA-binding protein denoted Cth2 coordinates a global metabolic rearrangement that aims to optimize iron utilization. The Cth2 protein contains two Cx8Cx5Cx3H tandem zinc fingers (TZFs) that specifically bind to adenosine/uridine-rich elements within the 3' untranslated region of many mRNAs to promote their degradation. The Cth2 protein shuttles between the nucleus and the cytoplasm. Once inside the nucleus, Cth2 binds target mRNAs and stimulate…
Isomeric state of $^{80}$Y and its role in the astrophysical rp-process
2001
5 pages, 7 figures.-- PACS nrs: 21.10.Tg; 23.20.Nx; 27.50.+e.
Designing the 5G network infrastructure: a flexible and reconfigurable architecture based on context and content information
2018
5G networks will have to offer extremely high volumes of content, compared to those of today’s. Moreover, they will have to support heterogeneous traffics, including machine-to-machine, generated by a massive volume of Internet-of-Things devices. Traffic demands will be variable in time and space. In this work, we argue that all this can be achieved in a cost-effective way if the network is flexible and reconfigurable. We present the Flex5Gware network architecture, designed to meet the above requirements. Moreover, we discuss the links between flexibility and reconfigurability, on the one side, and context awareness and content awareness, on the other; we show how two of the building…
Pirkstu sīkās motorikas attīstības veicināšana 6 gadīgiem bērniem pedagoģiskajā procesā"
2021
Attīstoties digitālās tehnoloģijas ierīcēm, bērni savu brīvo laiku cenšas aizpildīt ar datora, planšetes vai telefona starpniecību. Bakalaura darbs “Pirkstu sīkās motorikas attīstības veicināšana 6 gadīgiem bērniem pedagoģiskajā procesā” tika izstrādāts ar mērķi pētīt 6 gadīgu bērnu pirkstu sīkās motorikas attīstības iespējas pedagoģiskajā procesā, izmantojot pētījumam atlasītas rotaļas. Bakalaura darbs sastāv no divām daļām. Pirmajā daļā tika analizētas pedagoģiskās un psiholoģiskās literatūras atziņas par pedagoģiskā procesa saturu un tā organizēšanu pirmsskolā, par bērnu fizisko attīstību, par pirkstu sīkās motorikas saistību ar runas attīstību un roku - acu koordināciju nozīmību. Izstrā…
6 - 7 gadīgu bērnu stājas profilakses iespējas pirmsskolas pedagoģiskajā procesā
2021
Bakalaura darba tēma: 6 - 7 gadīgu bērnu stājas profilakses iespējas pirmsskolas pedagoģiskajā procesā Bakalaura darba autors: Kristiāna Aivija Viļumsone Bakalaura darba mērķis: teorētiski analizēt un prakstiski pētīt stājas profilakses iespējas pirmsskolas pedagoģiskajā procesā 6 – 7 gadīgiem bērniem. Bakalaura darba uzdevumi: 1.Analizēt pedagogu un psihologu atziņas par stāju, tās traucējumiem. 2.Raksturot 6 – 7 gadīgu bērnu fizisko attīstību. 3.Izzināt stājas profilakses iespējas pirmsskolas pedagoģiskajā procesā. 4.Pētīt stājas profilakses iespējas pirmsskolas pedagoģiskajā procesā. Bakalaura darba saturs: Bakalaura darbs sastāv no divām daļām – teorētiskās un empīriskās. Darba teorētis…
An extensive pattern of atypical neural speech-sound discrimination in newborns at risk of dyslexia.
2019
Objective: Identifying early signs of developmental dyslexia, associated with deficient speech-sound processing, is paramount to establish early interventions. We aimed to find early speech-sound processing deficiencies in dyslexia, expecting diminished and atypically lateralized event-related potentials (ERP) and mismatch responses (MMR) in newborns at dyslexia risk. Methods: ERPs were recorded to a pseudoword and its variants (vowel-duration, vowel-identity, and syllable-frequency changes) from 88 newborns at high or no familial risk. The response significance was tested, and group, laterality, and frontality effects were assessed with repeated-measures ANOVA. Results: An early positive a…
Inattention and Uncertainty in the Predictive Brain
2021
Negative effects of inattention on task performance can be seen in many contexts of society and human behavior, such as traffic, work, and sports. In traffic, inattention is one of the most frequently cited causal factors in accidents. In order to identify inattention and mitigate its negative effects, there is a need for quantifying attentional demands of dynamic tasks, with a credible basis in cognitive modeling and neuroscience. Recent developments in cognitive science have led to theories of cognition suggesting that brains are an advanced prediction engine. The function of this prediction engine is to support perception and action by continuously matching incoming sensory input with to…
Separation of uncorrelated stationary time series using autocovariance matrices
2014
Blind source separation (BSS) is a signal processing tool, which is widely used in various fields. Examples include biomedical signal separation, brain imaging and economic time series applications. In BSS, one assumes that the observed $p$ time series are linear combinations of $p$ latent uncorrelated weakly stationary time series. The aim is then to find an estimate for an unmixing matrix, which transforms the observed time series back to uncorrelated latent time series. In SOBI (Second Order Blind Identification) joint diagonalization of the covariance matrix and autocovariance matrices with several lags is used to estimate the unmixing matrix. The rows of an unmixing matrix can be deriv…
Extent and persistence of soil water repellency induced by pines in different geographic regions
2018
The extent (determined by the repellency indices RI and RIc) and persistence (determined by the water drop penetration time, WDPT) of soil water repellency (SWR) induced by pines were assessed in vastly different geographic regions. The actual SWR characteristics were estimated in situ in clay loam soil at Ciavolo, Italy (CiF), sandy soil at Culbin, United Kingdom (CuF), silty clay soil at Javea, Spain (JaF), and sandy soil at Sekule, Slovakia (SeF). For Culbin soil, the potential SWR characteristics were also determined after oven-drying at 60°C (CuD). For two of the three pine species considered, strong (Pinus pinaster at CiF) and severe (Pinus sylvestris at CuD and SeF) SWR conditions we…
On the stability of some controlled Markov chains and its applications to stochastic approximation with Markovian dynamic
2015
We develop a practical approach to establish the stability, that is, the recurrence in a given set, of a large class of controlled Markov chains. These processes arise in various areas of applied science and encompass important numerical methods. We show in particular how individual Lyapunov functions and associated drift conditions for the parametrized family of Markov transition probabilities and the parameter update can be combined to form Lyapunov functions for the joint process, leading to the proof of the desired stability property. Of particular interest is the fact that the approach applies even in situations where the two components of the process present a time-scale separation, w…