Search results for "CEM"

A new method to evaluate the influence of the glenosphere positioning on stability and range of motion of a reverse shoulder prosthesis

2019

Abstract Purpose Shoulder instability and reduced range of motion are two common complications of a total reverse shoulder arthroplasty. In this work, a new approach is proposed to estimate how the glenoid component positioning can influence the stability and the range of motion of a reverse shoulder prosthesis. Materials and methods A standard reverse shoulder prosthesis has been analysed. To perform virtual simulation of the shoulder-prosthesis assembly, all the components of the prosthesis have been acquired via a 3D laser scanner and the solid models of the shoulder bones have been reconstructed through CT images. Loads on the shoulder joint have been estimated using anatomical models d…

Monnaie endogène, refinancement bancaire et offre de crédit

1993

Post Keynesians have developped the view that credit availability is fundamentally determined by demand-side pressures. However, two aproaches o f money supply endogeneity are here distinguished : full and partial accommodation by central banks of reserve needs arising from bank lending. In the first case, central banks only set the supply price but not the supply quantity of reserves, in the second they can and do control reserve quantities. We examine the major implications of these theories on short term interest rates determination, management practices (particularly liability management) of commercial banks, financial innovations and quantity rationing by banks. We try to show that bot…

Enzyme Promiscuity in Enolase Superfamily. Theoretical Study of o-Succinylbenzoate Synthase Using QM/MM Methods

2015

The promiscuous activity of the enzyme o-succinylbenzoate synthase (OSBS) from the actinobacteria Amycolatopsis is investigated by means of QM/MM methods, using both density functional theory and semiempirical Hamiltonians. This enzyme catalyzes not only the dehydration of 2-succinyl-6R-hydroxy-2,4-cyclohexadiene-1R-carboxylate but also catalyzes racemization of different acylamino acids, with N-succinyl-R-phenylglycine being the best substrate. We investigated the molecular mechanisms for both reactions exploring the potential energy surface. Then, molecular dynamics simulations were performed to obtain the free energy profiles and the averaged interaction energies of enzymatic residues wi…

Doege-Potter syndrome: When seizures and hypoglycemia collide.

2018

About the Application in Practice, and Unavoidable Reform, of the Chilean Model of Recognition and Enforcement of Foreign Judgements

2014

El Derecho internacional privado chileno ofrece un reducido y disperso número de normas, poco elaboradas además. El artículo se centra en el punto del reconocimiento y ejecución de resoluciones judiciales y laudos arbitrales extranjeros, en especial con base en la práctica adoptada por la Corte Suprema desde 2000 hasta 2014. El resultado final del estudio pone en duda el modelo vigente y apunta hacia una reforma urgente de la normativa en materia de reconocimiento y ejecución de resolución judiciales extranjeras en Chile. The Chilean private international Law has a small and scattered, not quite developed, number of rules. This article focuses on the recognition and enforcement of foreign l…

Places of ancient agrarian culture : the discovery of a grain pit

2020

The recovery of memory as well as the protection, preservation, conservation and enhancement of the cultural heritage of our territory – both material and immaterial – are the starting points for this multidisciplinary research, which aims to recount a history that has almost been forgotten. We refer to the tradition of agrarian culture, and to the ancient production, commercialization and conservation of wheat: a valuable asset of sustenance for the community that, in centuries past, played a fundamental role for the socio-economic development of our country, particularly for cities overlooking the Mediterranean basin. Several methods and places have been used to store wheat. This study fo…

A Deep Reinforcement Learning scheme for Battery Energy Management

2020

Deep reinforcement learning is considered promising for many energy cost optimization tasks in smart buildings. How-ever, agent learning, in this context, is sometimes unstable and unpredictable, especially when the environments are complex. In this paper, we examine deep Reinforcement Learning (RL) algorithms developed for game play applied to a battery control task with an energy cost optimization objective. We explore how agent behavior and hyperparameters can be analyzed in a simplified environment with the goal of modifying the algorithms for increased stability. Our modified Deep Deterministic Policy Gradient (DDPG) agent is able to perform consistently close to the optimum over multi…

Performance Enhancement of Vapour-Compression Refrigeration Systems Using Nanoparticles: An Experimental Study

2021

In recent years, the development and characterization of new refrigerants with higher energetic efficiency have gained considerable interest [1], with a particular emphasis on the energetic performance of suitable replacements. Nanofluids have been proposed as possible alternative due to their role in enhancing the thermophysical proprieties of traditional refrigerants [2]. The comprehensive review in [2] suggests that thermal conductivity of nanofluid increases with temperature and volume concentration, but it is dependent on nanoparticle size distribution; specific heat is also increased if nanoparticles are added to the refrigerant.

Image-based MRI Gradient Estimation

2017

In order to reduce geometric distortion phenomena in MR images, every MRI system main magnet undergoes a shimming process. Since this process aims at optimizing magnetic field homogeneity within a so-called uniformity sphere, image quality outside this sphere is neglected. Since the fields vary smoothly in space, MR signal-to-noise ratio is still non-zero just outside the uniformity region, but correction of MR image distortion fails due to lack of magnetic field knowledge outside it. We propose a novel algorithm for measuring all the fields involved in the generation of images. Our proposal is based on exploitation of the distortion which can be observed in images of a known phantom. The p…

Hyperglycemia at admission, comorbidities, and in-hospital mortality in elderly patients hospitalized in internal medicine wards: data from the RePoS…

2021

Abstract Aims The association between hyperglycemia at hospital admission and relevant short- and long-term outcomes in elderly population is known. We assessed the effects on mortality of hyperglycemia, disability, and multimorbidity at admission in internal medicine ward in patients aged ≥ 65 years. Methods Data were collected from an active register of 102 internal medicine and geriatric wards in Italy (RePoSi project). Patients were recruited during four index weeks of a year. Socio-demographic data, reason for hospitalization, diagnoses, treatment, severity and comorbidity indexes (Cumulative Illness rating Scale CIRS-SI and CIRS-CI), renal function, functional (Barthel Index), and cog…