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Search Results: 1 - 10 of 317 matches for " Mias Pretorius "
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Jacques Freyssinet, Négocier l’emploi. 50 ans de négociations interprofessionnelles sur l’emploi et la formation
Arnaud Mias
La Nouvelle Revue du Travail , 2012,
Abstract: Jacques Freyssinet propose un retour sur cinquante années de négociations sur l’emploi . Il désigne par cette expression celles qui, précisément, font référence à l’emploi comme objectif de la négociation et source de légitimation de leur contenu (p. 11), ce qui couvre un vaste ensemble de thématiques : indemnisation du ch mage, restructurations, formation professionnelle, temps de travail, contrats de travail, gestion prévisionnelle de l’emploi… Malgré son titre, ce bilan ne répond pa...
Characterization of Genome-Wide Association-Identified Variants for Atrial Fibrillation in African Americans
Jessica T. Delaney, Janina M. Jeff, Nancy J. Brown, Mias Pretorius, Henry E. Okafor, Dawood Darbar, Dan M. Roden, Dana C. Crawford
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0032338
Abstract: Background Despite a greater burden of risk factors, atrial fibrillation (AF) is less common among African Americans than European-descent populations. Genome-wide association studies (GWAS) for AF in European-descent populations have identified three predominant genomic regions associated with increased risk (1q21, 4q25, and 16q22). The contribution of these loci to AF risk in African American is unknown. Methodology/Principal Findings We studied 73 African Americans with AF from the Vanderbilt-Meharry AF registry and 71 African American controls, with no history of AF including after cardiac surgery. Tests of association were performed for 148 SNPs across the three regions associated with AF, and 22 SNPs were significantly associated with AF (P<0.05). The SNPs with the strongest associations in African Americans were both different from the index SNPs identified in European-descent populations and independent from the index European-descent population SNPs (r2<0.40 in HapMap CEU): 1q21 rs4845396 (odds ratio [OR] 0.30, 95% confidence interval [CI] 0.13–0.67, P = 0.003), 4q25 rs4631108 (OR 3.43, 95% CI 1.59–7.42, P = 0.002), and 16q22 rs16971547 (OR 8.1, 95% CI 1.46–45.4, P = 0.016). Estimates of European ancestry were similar among cases (23.6%) and controls (23.8%). Accordingly, the probability of having two copies of the European derived chromosomes at each region did not differ between cases and controls. Conclusions/Significance Variable European admixture at known AF loci does not explain decreased AF susceptibility in African Americans. These data support the role of 1q21, 4q25, and 16q22 variants in AF risk for African Americans, although the index SNPs differ from those identified in European-descent populations.
Water warming garment versus forced air warming system in prevention of intraoperative hypothermia during liver transplantation: a randomized controlled trial [ISRCTN32154832]
Piotr K Janicki, Cristina Stoica, William C Chapman, J Kelly Wright, Garry Walker, Ram Pai, Ann Walia, Mias Pretorius, C Wright Pinson
BMC Anesthesiology , 2002, DOI: 10.1186/1471-2253-2-7
Abstract: In this prospective, randomized and open-labelled study, 24 adult patients were enrolled in one of two intraoperative temperature management groups during OLT. The water-garment group (N = 12) received warming with a body temperature (esophageal) set point of 36.8°C. The forced air-warmer group (N = 12) received routine warming therapy using upper- and lower-body forced-air warming system. Body core temperature (primary outcome) was recorded intraoperatively and during the two hours after surgery in both groups.The mean core temperatures during incision, one hour after incision and during the skin closing were significantly higher (p < 0.05, t test with Bonferroni corrections for the individual tests) in the water warmer group compared to the control group (36.7 ± 0.1, 36.7 ± 0.2, 36.8 ± 0.1 vs 36.1 ± 0.4, 36.1 ± 0.4, 36.07 ± 0.4°C, respectively). Moreover, significantly higher core temperatures were observed in the water warmer group than in the control group during the placement of cold liver allograft (36.75 ± 0.17 vs 36.09 ± 0.38°C, respectively) and during the allograft reperfusion period (36.3 ± 0.26 vs 35.52 ± 0.42°C, respectively). In addition, the core temperatures immediately after admission to the SICU (36.75 ± 0.13 vs 36.22 ± 0.3°C, respectively) and at one hr (36.95 ± 0.13 vs 36.46 ± 0.2°C, respectively) were significantly higher in the water warmer group, compared to the control group, whereas the core temperature did not differ significantly afte two hours in ICU in both groups.The investigated water warming system results in better maintenance of intraoperative normothermia than routine air forced warming applied to upper- and lower body.Perioperative hypothermia has been associated with morbidity in the general surgical patient population [1-6]. It is therefore appropriate to keep surgical patients normothermic (i.e., at least 36°C). Despite current advances in intraoperative warming, hypothermia during the extensive abdominal surgeries, including o
Critique of Optical Negative Refraction Superlensing
George Christou,Christos Mias
Physics , 2010,
Abstract: Has the ten-year old quest for the optical superlens, based on Veselago's hypothesis of negative refraction, been a chimera? We argue that Pendry's alternative prescription of the silver superlens is nothing more than an application of the natural phenomenon of surface plasmon resonance that occurs in the noble metal films. This phenomenon does not predict the reality of Veselago's negative refractive index materials. We give a simple explanation of how this resonance achieves a field intensity enhancement at the interface of silver and air without involving the concept of negative refraction.
The Chimaerical Quest for the Optical Plasmonic Superlens
George Christou,Christos Mias
Physics , 2013,
Abstract: This commentary aims to expose the fallacy of claiming that a plasmonic silver film superlens is capable to image real subwavelength objects. This lens was proposed by the Berkeley's group who, in their misleading experiment, inappropriately regarded subwavelength apertures as the objects to be imaged whereas the main function of these apertures was to transform free space laser light into an evanescent field necessary for exciting the surface plasmon resonance phenomenon in silver. In addition, the apertures also determined the constrained effective area on the silver film where the phenomenon could occur. We provide a fresh insightful physical explanation of how this phenomenon is excited and what it entails. We emphasize the phenomenon's important effect of subwavelength conversion (reduction) of the generated surface plasmons and their associated bound enhanced evanescent fields.
Genome-Wide Assessment for Genetic Variants Associated with Ventricular Dysfunction after Primary Coronary Artery Bypass Graft Surgery
Amanda A. Fox,Mias Pretorius,Kuang-Yu Liu,Charles D. Collard,Tjorvi E. Perry,Stanton K. Shernan,Philip L. De Jager,David A. Hafler,Daniel S. Herman,Steven R. DePalma,Dan M. Roden,Jochen D. Muehlschlegel,Brian S. Donahue,Dawood Darbar,J. G. Seidman,Simon C. Body,Christine E. Seidman
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0024593
Abstract: Postoperative ventricular dysfunction (VnD) occurs in 9–20% of coronary artery bypass graft (CABG) surgical patients and is associated with increased postoperative morbidity and mortality. Understanding genetic causes of postoperative VnD should enhance patient risk stratification and improve treatment and prevention strategies. We aimed to determine if genetic variants associate with occurrence of in-hospital VnD after CABG surgery.
Lumboscopia: Experiencia con la técnica en Berazategui. Primeros 600 casos
Santinelli,Flavio; Mias,Fernando; Manduley,Alejandro;
Archivos Espa?oles de Urología (Ed. impresa) , 2007, DOI: 10.4321/S0004-06142007000300008
Abstract: objectives: to show the lumboscopy technique developed in our department, our case series and its results. methods: from august 15th 1997 to date 606 patients were operated on by means of the lumboscopy technique. 152 nephrectomies, 18 partial nephrectomies, 103 pyeloplasties, 5 adrenalectomies, 89 pyelolithotomies, 153 ureterolithotomies, 44 renal cyst unroofing and other 42 procedures were performed. results: we perform the retroperitoneal access in the inferior lumbar triangle, with digital blunt dissection only and direct pneumatic dissection with a high flow insufflator, without balloon or balloon trocar dissection. we describe the development of the working space with perirenal fat flaps, as well as the various types of pathology operated and our complications. conclusions: the working space in lumboscopy must be created by the surgeon beyond using a balloon or direct digital dissection technique. the technique we describe is easy and reproducible, creating an adequate surgical space and requires the anatomical knowledge to be able to identify landmarks.
Absence of Domain Wall Roughening in a Transverse Field Ising Model with Long-Range Interactions
George I. Mias,S. M. Girvin
Physics , 2005, DOI: 10.1103/PhysRevB.72.064411
Abstract: We investigate roughening transitions in the context of transverse-field Ising models. As a modification of the transverse Ising model with short range interactions, which has been shown to exhibit domain wall roughening, we have looked into the possibility of a roughening transition for the case of long-range interactions, since such a system is physically realized in the insulator LiHoF4. The combination of strong Ising anisotropy and long-range forces lead naturally to the formation of domain walls but we find that the long-range forces destroy the roughening transition.
Sleep disorders — a doctor’s nightmare
J Pretorius
Continuing Medical Education , 2003,
Seemingly harmless new Christian religious movements in South Africa pose serious threats of spiritual abuse
HP Pretorius
HTS Theological Studies/Teologiese Studies , 2007,
Abstract: This article argues that Citizen rights in South Africa are as well protected as the structures that ensure their protection. Strict measures are in place to clamp down on the abuse of women and children. Domestic violence is treated in a very serious light. But what about spiritual abuse that occurs in seemingly safe environments – in the church or within religious groups? What about the victims of this type of abuse? In this article the dynamics of spiritual abuse within seemingly harmless new Christian religious groups in South Africa and the effects of spiritual abuse on their victims are exposed. The article maintains that serious threats of spiritual abuse occur within some of the new Christian religious movements in South Africa despite their seemingly harmless outward appearance. It is furthermore contended that measures to curb these abuses are lacking. HTS Theological Studies Vol. 63 (1) 2007: pp. 261-281
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