Search results for "Control."
showing 10 items of 13063 documents
Refined instability estimates for some inverse problems
2022
Many inverse problems are known to be ill-posed. The ill-posedness can be manifested by an instability estimate of exponential type, first derived by Mandache [29]. In this work, based on Mandache's idea, we refine the instability estimates for two inverse problems, including the inverse inclusion problem and the inverse scattering problem. Our aim is to derive explicitly the dependence of the instability estimates on key parameters. The first result of this work is to show how the instability depends on the depth of the hidden inclusion and the conductivity of the background medium. This work can be regarded as a counterpart of the depth-dependent and conductivity-dependent stability estim…
On a numerical solution of the Maxwell equations by discrete exterior calculus
2014
A graph-based multigrid with applications
2010
Oxidative stress and antioxidant levels in patients with anorexia nervosa: A systematic review and exploratory meta-analysis.
2015
Objective To systematically review and meta-analyze oxidative stress and antioxidant markers in anorexia nervosa (AN). Methods Electronic PubMed search from database inception until 12/31/2013. Out of 1062 hits, 29 studies comparing oxidative stress/antioxidant markers between patients with AN and healthy controls (HCs) with a total of 1,729 participants (AN-=-895, HCs-=-834) were eligible. Data about oxidative stress and antioxidant markers, independent of their source, were extracted. We calculated random effects standardized mean differences (SMDs) as effect size measures for outcomes reported in ≥5 studies; others were summarized descriptively. Results Compared to HCs, AN patients showe…
Intron variants of the p53 gene are associated with increased risk for ovarian cancer but not in carriers of BRCA1 or BRCA2 germline mutations
1999
Two biallelic polymorphisms in introns 3 and 6 of the p53 gene were analysed for a possible risk-modifying effect for ovarian cancer. Germline DNA was genotyped from 310 German Caucasian ovarian cancer patients and 364 healthy controls. We also typed 124 affected and 276 unaffected female carriers with known deleterious BRCA1 or BRCA2 germline mutation from high-risk breast-ovarian cancer families. Genotyping was based on PCR and high-resolution gel electrophoresis. German ovarian cancer patients who carried the rare allele of the MspI restriction fragment length polymorphism (RELP) in intron 6 were found to have an overall 1.93-fold increased risk (95% confidence internal (CI) 1.27–2.91) w…
Predictive value of p53, Ki67 and TLR5 in neoplastic progression of Barrett’s esophagus: a matched case–control study
2022
Abstract Barrett’s esophagus progresses to high-grade dysplasia or cancer along the well-established metaplasia-dysplasia-adenocarcinoma sequence. The aim of this study was to evaluate the value of p53, Ki67, and toll-like receptor 5 (TLR5) in prediction of malignant progression of Barrett’s metaplasia and low-grade dysplasia. This was a retrospective matched case–control study based on Northern and Central Finland population. Patients diagnosed with esophageal high-grade dysplasia or adenocarcinoma were included. From these patients, all previous endoscopy samples were obtained along with original diagnostic HE-slides and clinical data. Age- and sex-matched patients with non-progressing Ba…
Digital control circuitry for the p53 dynamics in cancer cell and apoptosis
2010
Abstract Experimental work and theoretical models deduce a “digital” response of the p53 transcription factor when genomic integrity is damaged. The mutual influence of p53 and its antagonist, the Mdm2 oncogene, is closed in a feedback. This paper proposes an aerospace-based architecture for translating the p53/Mdm2/DNA damage network into a digital circuitry in which the optimal control theory is applied for obtaining the requested dynamic evolutions of some considered cell species for repairing a DNA damage. The purpose of this paper is to demonstrate the usefulness of such digital circuitry design to detect and predict the cell species dynamics for shedding light on their inner and mutua…
PARTE IV - Impresa agricola e sistema agroalimentare. Capitolo III, 3.1. L’informazione, l’etichettatura e la tracciabilità
2023
Questo volume nasce dalla necessità di offrire una lettura contemporanea delle peculiari regole che tradizionalmente hanno attribuito al Diritto agrario un carattere di specialità. Facciamo riferimento alle norme che in un’ottica di programmazione di un settore produttivo centrale per l’economia del nostro paese disciplinano l’impresa agricola, la proprietà terriera, i contratti agrari, il lavoro agricolo, il credito agrario, il mercato dei prodotti agricoli. Regole la cui chiave di lettura è sempre passata dalla considerazione dell’esistenza di un legame stretto tra “agricoltura” e “terra”, considerazione che non riteniamo superata, ma piuttosto aggiornata, dalle numerose innovazioni legis…
Parte IV, Capitolo III, L’informazione, l’etichettatura e la tracciabilità. Il principio di precauzione. I controlli ufficiali e il pacchetto igiene
2021
Questo volume nasce dalla necessità di offrire una lettura aggiornata, contemporanea appunto, delle peculiari regole che tradizionalmente han- no attribuito al Diritto agrario un carattere di specialità. Facciamo riferimento alle norme che in un’ottica di programmazione di un settore produttivo peculiare disciplinano l’impresa agricola, la proprietà terriera, i contratti agrari, il lavoro agricolo, il credito agrario, il mercato dei prodotti agricoli. Regole la cui chiave di lettura è sempre passata dalla considerazione dell’esistenza di un legame stretto tra “agricoltura” e “terra”, considerazione che non riteniamo superata, ma piuttosto aggiornata, dalle numerose innovazioni legislati…