171,914 research outputs found
Extraction of a one-particle reduced density matrix from a quantum monte carlo electronic density: A new tool for studying nondynamic correlation
No full textIn this work, we present a method to build a first order reduced density matrix (1-RDM) of a molecule from variational Quantum Monte Carlo (VMC) computations by means of a given correlated mapping wave function. Such a wave function is modeled on a Generalized Valence Bond plus Complete Active Space Configuration Interaction form and fits at best the density resulting from the Slater-Jastrow wave function of VMC. The accuracy of the method proposed has been proved by comparing the resulting kinetic energy with the corresponding VMC value. This 1-RDM is used to analyze the amount of correlation eventually captured in Kohn-Sham calculations performed in an unrestricted approach (UKS-DFT) and with different energy functionals. We performed test calculations on a selected set of molecules that show a significant multireference character. In this analysis, we compared both local and global indicators of nondynamic and dynamic correlation. Moreover, following the natural orbital decomposition of the 1-RDM, we also compared the effective temperatures of the corresponding Fermi-like distributions. Although there is a general agreement between UKS-DFT and VMC, we found the best match with the functional LC-BLYP
Peuple autochtone, éthique et générations futures. À propos de l’arrêt Cour suprême du Canada, 2014.06.26., Nation Tsilhqot’in c. Colombie-Britannique (2014 CSC 44)
No full textNaim-Gesbert Éric. Peuple autochtone, éthique et générations futures. À propos de l’arrêt Cour suprême du Canada, 2014.06.26., Nation Tsilhqot’in c. Colombie-Britannique (2014 CSC 44). In: Revue Juridique de l'Environnement, n°4, 2014. pp. 609-611
Op-Ed: “Interpreting the Dublin Regulation amid fundamental rights violations at the EU’s border – Reflections on the Judgment of the Court of Justice in X v Staatssecretaris van Justitie en Veiligheid, C-392/22”
No full textThis op-ed analyzes the judgment of the Court of Justice of the European Union (CJEU) in X v Staatssecretaris van Justitie en Veiligheid (C-392/22), which addresses the interplay between fundamental rights violations at EU borders and the Dublin III Regulation’s principle of mutual trust. The case involves a Syrian asylum seeker contesting their transfer to Poland due to systemic deficiencies in its asylum system, including repeated pushbacks and harsh detention practices. The Court clarified that such practices, while serious violations of EU law and the Charter of Fundamental Rights, must fulfill specific conditions to halt Dublin transfers. The judgment reaffirms that systemic flaws affecting asylum seekers must be substantiated with evidence demonstrating risks post-transfer, emphasizing the role of individualized guarantees and updated information in assessing potential breaches of Article 4 CFR
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Common fragile sites: a new tool to study chromosome instability diseases
No full textReplication stress is a major cause of Chromosomal Instability (CIN) that manifests as chromosome rearrangements, gaps and breaks, including those cytological expressed within specific chromosome regions named Common Fragile Sites (CFSs). The molecular mechanisms of CFSs instability have not been completely elucidated yet. In the first part of my work, I characterized the expression and the replication timing of human CFSs upon treatment with aphidicolin (APH), a DNA polymerase α (alpha) inhibitor, in three cellular lines: Glioblastoma Multiforme U-251 MG cell line and two isogenic Fanconi Anemia lymphoblastoid lines (the mutated HSC72 FA-A and the corrected HSC72 FANCA). GBM and FA cell lines are both associated with high physiological levels of CIN and thus are good genetic models to understand the causes underlying CFSs instability. Glioblastoma Multiforme (GBM) is a tumor of the Central Nervous System (CNS) and Fanconi Anemia (FA) is a rare multigenic disorder caused by mutations in FA DNA repair genes. I identified CFSs that showed a frequency equal to at least 1% of the total gaps/breaks: 17 CFSs in GBM, 16 CFSs in HSC72 FA-A, 19 CFSs in HSC72 FANCA. Only few of them were found to be cell type-specific. In the last part of my work, CFSs induced by 4', 6′-diamidino-2-phenylindole hydrochloride (DAPI), a DNA dye binding to AT-rich sequences and acting as an under-condensing agent in G2-phase, were analyzed in a pathological background such as FA cells (which are characterized by a prolonged G2-phase upon DNA damage) to understand how the post-replicative chromatin compaction is essential to their integrity. Presence of long genes, incomplete replication, improper chromatin condensation and DNA synthesis during mitosis (MiDAS) after APH and DAPI treatment suggest that impaired replication process and defective chromatin compaction may contribute to the loci-specific fragility in U-251 MG cells and in both HSC72 FA lymphoblasts cell lines. Altogether, my work offers a comprehensive characterization of CFSs expressed in GBM and FA cells that may be further exploited for cytogenetic and clinical studies to advance our understanding of the physiological status and these genic and genetic disorders
Zur Auslegung des Begriffs 'illegal überschreitet' in Art 13 Abs 1 Dublin-III- VO: , Besprechung des EuGH-Urteils in der Rs C-646/16 (Jafari) vom 26.07.2017
No full textIm Rahmen eines vielbeachteten Vorabentscheidungsverfahrens urteilte der EuGH, dass Asylsuchende dann im Sinne der Dublin-III-VO die Grenze eines Mitgliedstaates „illegal überschreiten“, wenn die allgemeinen Einreisevoraussetzungen nach dem Schengener Grenzkodex nicht erfüllt sind, selbst wenn die Behörden des betreffenden Mitgliedstaates die Einreise gestatten. Dabei argumentiert der EuGH in einem streng formellen Sinn und vernachlässigt weitestgehend die besonderen Umstände des Sachverhalts
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
sj-docx-1-pit-10.1177_15269248211064879 - Supplemental material for Effect of Hepatitis C Viremia on Posttransplant Diabetes Mellitus in Liver Transplant Recipients
No full textSupplemental material, sj-docx-1-pit-10.1177_15269248211064879 for Effect of Hepatitis C Viremia on Posttransplant Diabetes Mellitus in Liver Transplant Recipients by Kelsey Klein, Joelle Nelson, Christina Long, Kermit Speeg, Naim Alkhouri and Reed Hall in Progress in Transplantation</p
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