Search results for "PERFORMANCE"

Hold-in, Pull-in and Lock-in Ranges for Phase-locked Loop with Tangential Characteristic of the Phase Detector

2019

In the present paper the phase-locked loop (PLL), an electric circuit widely used in telecommunications and computer architectures is considered. A new modification of the PLL with tangential phase detector characteristic and active proportionally-integrating (PI) filter is introduced. Hold-in, pull-in and lock-in ranges for given circuit are studied rigorously. It is shown that lock-in range of the new PLL model is infinite, compared to the finite lock-in range of the classical PLL. peerReviewed

Neuromuscular function and bone geometry and strength in aging

2010

Retinal Straylight Before and After Penetrating Keratoplasty in an Eye with a Post-Herpetic Corneal Scar

2008

Objetivo: Estudio in vivo de la luz dispersa que alcanza la retina en un paciente antes y despues de someterse a una queratoplastia penetrante (o sus siglas en ingles, PKP). Metodos: En un paciente varon de 65 anos con una ulcera corneal herpetica se midio la proporcion de luz dispersa que alcanza la retina tanto antes como despues de una PKP, utilizando para ello un metodo psicometrico denominado "de comparacion por compensacion" («Compensation comparison method», C-Quant straylightmeter, Oculus GmbH, Alemania). Resultados: La cantidad de luz dispersa que alcanza la retina medida antes de la cirugia fue elevada en comparacion con los valores obtenidos en estudios previos en sujetos normale…

Inducing Rules of Ensemble Music Performance : A Machine Learning Approach

2013

Previous research in expressive music performance has described how solo musicians intuitively shape each note in relation to local/global score contexts. However, expression in ensemble performances, where each individual voice is played simultaneously with other voices, has been little explored. We present an exploratory study in which the performance of a string quartet is recorded and analysed by a computer. We use contact microphones to acquire four audio signals from which a set of audio descriptors is extracted individually for each musician. Moreover, we use motion capture to extract bowing descriptors (bow velocity/force) from each of the four performers. The gathered multimodal da…

The effects of the anti-mafia entrepreneurial behavior on firm performance: an empirical study on southern Italian small-medium enterprises

2015

The organized crime is a relevant ethical, cultural, legal, sociologic and economic issue in many countries. In the last years there have been some positive signs of a reaction against the mafia like the successful experience of Addiopizzo, an anti-bribery association founded in Palermo in 2004 that today counts over 500 affiliated firms. Gambetta (1993) suggests the mafia could better be understood as a profit maximizing corporation in the marketplace for private protection. Despite this position has been criticized (Scalia, 2010), it highlights the crucial role of the pizzo for the mafia activities. In this study, we identify as “Anti-mafia Entrepreneurial Behaviour” (AEB) the choice of t…

Motor imagery in unipolar major depression

2014

International audience; Background: Motor imagery is a potential tool to investigate action representation, as it can provide insights into the processes of action planning and preparation. Recent studies suggest that depressed patients present specific impairment in mental rotation. The present study was designed to investigate the influence of unipolar depression on motor imagery ability. Methods: Fourteen right-handed patients meeting DSM-IV criteria for unipolar depression were compared to 14 matched healthy controls. Imagery ability was accessed by the timing correspondence between executed and imagined movements during a pointing task, involving strong spatiotemporal constraints (spee…

Networking strategies as enabler for competitive advantage creation: a market-based and a resource-based perspectives

2010

The purpose of this work is to explore the potential of networking strategy as a source of competitive advantage by integrating market-based and resource-based logics. According to the former logic a firm identifies operations performance objectives as drivers for achieving its wished competitive position and advantage. According to the latter logic the firm achieves a competitive advantage through the obtainment and/or the creation of valuable, rare, imperfectly imitable, and not substitutable resources. Both operations performance objectives and strategic resource needs should, thus, directly affect networking strategy decisions. The question is whether they effectively do and how. In thi…

Achieving operations performance objectives through networking strategy

2010

The main objective of this paper is to investigate how firms make strategic networking decisions in order to pursue competitive advantage. Literature analysis with theory building purposes and two case studies to support our theoretical findings and to explore the linkages between networking strategy and operations performance objectives constitute our research methods. Our analysis led to the definition of networking strategy in terms of decisional dimensions, and found effective linkages between networking decisions made by managers and wished operations performance objectives.

Networking Strategies as Enabler for Competitive Advantage Creation: market-based and resource-based Perspectives

2010

This paper explores the potential of networking strategy as a source of competitive advantage by integrating market-based and resource-based logics. It contributes to production economics literature by considering not just supply chain network structures but also others kinds of network that can emerge from horizontal agreements (i.e. alliances, partnerships, joint ventures, consortia, etc.). The paper reviews the literature and develops propositions regarding how make/buy/make together decisions, governance mechanisms and network-base structures allow firms both to pursue pre fixed operations performance objectives and obtain/create valuable resources. The practical applications of the pro…

Triacylglycerol Analysis in Human Milk and Other Mammalian Species: Small-Scale Sample Preparation, Characterization, and Statistical Classification …

2015

In this work, a method for the separation of triacylglycerols (TAGs) present in human milk and from other mammalian species by reversed-phase high-performance liquid chromatography using a core–shell particle packed column with UV and evaporative light-scattering detectors is described. Under optimal conditions, a mobile phase containing acetonitrile/n-pentanol at 10 °C gave an excellent resolution among more than 50 TAG peaks. A small-scale method for fat extraction in these milks (particularly of interest for human milk samples) using minimal amounts of sample and reagents was also developed. The proposed extraction protocol and the traditional method were compared, giving similar results…