Search results for "Constructive"
showing 10 items of 301 documents
Memristors and nonequilibrium stochastic multistable systems
2022
The main aim of this special issue is to report the recent advances and new trends in memristors and nonequilibrium stochastic multistable systems, both theoretically and experimentally, within an interdisci-plinary context. In particular, memristors are multistable systems whose switching dynamics is a stochastic process, which can be controlled by internal and external noise sources, unveiling the constructive role of random fluctuations. Furthermore, the use of memristors as memory elements in neuromorphic systems with noise-assisted persistence of memory states, chaotic dynamics, metastable chaos and chaos synchronization, new stochastic nonlinear models, noise-induced phenomena such as…
Low-cost method for obtaining medical rapid prototyping using desktop 3d printing : a novel technique for mandibular reconstruction planning
2017
Background Three-dimensional (3D) printing is relatively a new technology with clinical applications, which enable us to create rapid accurate prototype of the selected anatomic region, making it possible to plan complex surgery and pre-bend hardware for individual surgical cases. This study aimed to express our experience with the use of medical rapid prototype (MRP) of the maxillofacial region created by desktop 3D printer and its application in maxillofacial reconstructive surgeries. Material and methods Three patients with benign mandible tumors were included in this study after obtaining informed consent. All patient's maxillofacial CT scan data was processed by segmentation and isolat…
Constructing adaptive generalized polynomial chaos method to measure the uncertainty in continuous models: A computational approach
2015
Due to errors in measurements and inherent variability in the quantities of interest, models based on random differential equations give more realistic results than their deterministic counterpart. The generalized polynomial chaos (gPC) is a powerful technique used to approximate the solution of these equations when the random inputs follow standard probability distributions. But in many cases these random inputs do not have a standard probability distribution. In this paper, we present a step-by-step constructive methodology to implement directly a useful version of adaptive gPC for arbitrary distributions, extending the applicability of the gPC. The paper mainly focuses on the computation…
CRITERIA FOR SUSTAINABILITY OF OLD-AGE PENSION SYSTEM BASED ON THE NDC PRINCIPLES
2015
The topicality of the research subject. The foundations of the old-age pension scheme based on notional accounts, also referred to as the “notional defined contribution” or “non-financial defined contribution” (NDC) old-age pension scheme, were laid in Sweden in 1994, when the prevailing view was that a sustainable defined-contribution PAYG old-age pension scheme is impossible. Since then, the NDC system modifications have been implemented in several countries; since 2000, this scheme is also part of the Latvian pension system and works significantly better than the other part of the pension system - the funded pension scheme. However, the sustainability of NDC scheme is still being questio…
La capitalización de los arrendamientos operativos: Análisis del impacto en las empresas del IBEX 35
2018
Purpose: This paper analyzes the consequences of the change in the accounting rules about operating leases in the companies and users of financial information. Design/methodology: We use the constructive capitalization method to estimate the liabilities and leased assets and perform an ex ante analysis of the regulatory impact in the IBEX 35 non-financial companies. Non-parametric tests are employed to examine the effect on certain ratios, and through a multivariate regression we investigate the business characteristics that explain the variation of EBITDA. Findings: The ratios under study are significantly affected by the capitalization of operating leases. The explanatory analysis shows t…
Towards a more humanistic understanding of organizational trust
2011
PurposeThe aim of this paper is to propose a wider and more humanistic understanding of the phenomenon of trust and “trust building” through a dialogue between ethics and social sciences.Design/methodology/approachThis paper offers a constructive critical review of the explanation of trust proposed by Mayer et al. in their 1995 seminal article, and expands this by considering the ethical dimension and the role of virtues.FindingsThe integrative model of organizational trust by Mayer et al. lacks a specific reference to the role played by human will and the ability to make free choices. When assessing the trust built in a relationship, an explicit consideration of human will should be includ…
LA COPERTURA IN FERRO DEL POLITEAMA GARIBALDI. UNA INNOVATIVA SPERIMENTAZIONE NELLA PALERMO DEL XIX SECOLO
2015
The roofing of the nineteenth Politeama Garibaldi in Palermo creates to the designer, Giuseppe Damiani Almeyda, technical and architectural difficulties: in fact, if the scene roofing has been resolved applying established schemes, for the roofing of the stalls area, made years later, an efficient connection with the existing roofing and the external walls was manifested. The goal of this study is the knowledge of the iron structure, the production and processing techniques adopted for the realization of the roofing, also aimed to the recognition of the inspiring structural models, the connecting systems, the state of preservation. Through the analysis of the used shapes and techniques, the…
Mauro Picone, Sandro Faedo, and the numerical solution of partial differential equations in Italy (1928-1953)
2013
In this paper we revisit the pioneering work on the numerical analysis of partial differential equations (PDEs) by two Italian mathematicians, Mauro Picone (1885-1977) and Sandro Faedo (1913-2001). We argue that while the development of constructive methods for the solution of PDEs was central to Picone's vision of applied mathematics, his own work in this area had relatively little direct influence on the emerging field of modern numerical analysis. We contrast this with Picone's influence through his students and collaborators, in particular on the work of Faedo which, while not the result of immediate applied concerns, turned out to be of lasting importance for the numerical analysis of …
Papilla preservation periodontal surgery in periodontal reconstruction for deep combined intra-suprabony defects. Retrospective analysis of a registr…
2021
Background Suprabony defects are the most prevalent defects and there is very little evidence on their treatment. This study aims to assess the effectiveness of papilla preservation periodontal surgery in the periodontal reconstruction of combined deep intra-suprabony defects. Material and Methods 20 patients with combined intrabony and supra-alveolar deep periodontal defects treated by papilla preservation periodontal surgery were analyzed. Defects were treated with enamel matrix derivate plus xenograft. Clinical recordings made before surgery and at 12 months. Results Papilla preservation periodontal surgery showed significant PPD reduction (4.4 ± 1.46 mm; p<0.001), clinical attachment ga…
Two Simple Constructive algorithms for the Distributed Assembly Permutation Flowshop Scheduling Problem
2014
Nowadays, it is necessary to improve the management of complex supply chains which are often composed of multi-plant facilities. This paper proposes a Distributed Assembly Permutation Flowshop Scheduling Problem (DAPFSP). This problem is a generalization of the Distributed Permutation Flowshop Scheduling Problem (DPFSP) presented by Naderi and Ruiz (Comput Oper Res, 37(4):754–768, 2010). The first stage of the DAPFSP is composed of f identical production factories. Each center is a flowshop that produces jobs that have to be assembled into final products in a second assembly stage. The objective is to minimize the makespan. Two simple constructive algorithms are proposed to solve the proble…