Search results for "tolerance"
showing 10 items of 956 documents
Flexible power converters for the fault tolerant operation of Micro-Grids
2010
The progressive penetration level of Distributed Generation (DG) is destined to cause deep changes in the existing distribution networks no longer considered as passive terminations of the whole electrical system. A possible solution is the realization of small networks, namely the Micro-Grids, reproducing in themselves the structure of the main production and distribution of the electrical energy system. In order to gain an adequate reliability level of the microgrids the individuation and the management of the faults with the goal of maintaining the micro-grid operation (fault tolerant operation) is quite important. In the present paper flexible power converters and a companion control al…
The Influence of Ambiguity Tolerance on Willingness to Communicate in L2
2018
The main purpose of this chapter is to find empirical evidence for the role of ambiguity tolerance (AT) in shaping one’s L2 willingness to communicate levels in the context of the English-as-a-foreign-language (EFL) classroom, in the Polish educational context. As the pyramid model of L2 WTC proposes (Maclntyre et al„ 1998), AT’s basis is constituted by the most distal and enduring influences of personality. For this reason, ambiguity tolerance, conceived of as a personality variable (Fumham and Marks, 2013), can have a significant impact on L2 WTC. The complexity of interrelated mechanisms embedded in the foreign language learning context induce ambivalent feelings of being simultaneously …
Contamination of a hospital plumbing system by persister cells of a copper-tolerant high-risk clone of Pseudomonas aeruginosa
2019
Abstract Background Pseudomonas aeruginosa (PA) is an important opportunistic pathogen that thrives best in the distal elements of plumbing and waste-water systems. Although nosocomial outbreaks of PA have been associated with water sources, the role of the plumbing system of healthcare premises as a reservoir for this pathogen is still unclear. Materials and methods We collected water samples from 12 technical areas, distant from any medical activity, in a teaching hospital in France once a week for 11 weeks. We used a method that resuscitates persister cells because of the nutrient-poor conditions and the presence of inhibitors (e.g. chlorine and copper ions). Briefly, water was sampled i…
Alterations of carbohydrate metabolism during pregnancy. Effects on the mother and new born infant.
2020
Abstract Introduction Gestational diabetes is the pathology that most frequently causes medical alterations in pregnancy. The objective of this study is to assess the relationship between the presence of alterations in the metabolism of carbohydrates during pregnancy and the risk of presenting adverse obstetric outcomes in the mother and the fetus. Patients and method An observational study was conducted in 799 women who had just given birth. The clinical and obstetric characteristics of the patients, as well as the data related to pregnancy and delivery, including the state of the newborn were analyzed. The information was evaluated in relation to the alterations in the carbohydrate metabo…
Suppression of humoral antibody formation against sheep red blood cells by infections with HSV-2 and the influence of mouse cytomegalovirus
1987
HSV-2 infections suppress the antibody response to HSV-1 but do not impair the mouse cytomegalo virus (MCMV) antibody generating system. In contrast, the sheep red blood cell (SRBC) IgM response is impaired by preinfections with HSV-2 but not with HSV-1. From the time kinetics of this suppression it can be concluded that only a certain submechanism "spills over" to the SRBC system. MCMV suppresses the antibody formation induced by HSV-1.
Design of an exact data deduplication cluster
2012
Data deduplication is an important component of enterprise storage environments. The throughput and capacity limitations of single node solutions have led to the development of clustered deduplication systems. Most implemented clustered inline solutions are trading deduplication ratio versus performance and are willing to miss opportunities to detect redundant data, which a single node system would detect. We present an inline deduplication cluster with a joint distributed chunk index, which is able to detect as much redundancy as a single node solution. The use of locality and load balancing paradigms enables the nodes to minimize information exchange. Therefore, we are able to show that, …
A fault-tolerant protocol for railway control systems
2006
Railway control systems are largely based on data communication and network technologies. With the adoption of Ethernet-IP as the main technology for building end-to-end real-time networks on railway control systems, the requirement to deliver high availability, quality and secure services over Ethernet has become strategic. Critical real-time traffic is generally penalized and the maximum restoration time of 50 msec sometimes is exceeded because of real-time applications hangings, so passengers' safety could be committed. It occurs on more than twenty percent of critical fail tests performed. Our main goal is to minimize restoration time from the application point of view. This article des…
Novel Fault-Tolerant Routing Technique for ZMesh Topology based Network-on-Chip Design
2020
This paper proposes a novel fault-tolerant routing technique for ZMesh topology based Network-on-Chip (NoC) design. The proposed algorithm caters the link faults and routes the data packets seamlessly to the destination. This algorithm has been compared with the existing techniques proposed for mesh topology counterparts. The experimentations have been carried out by increasing ZMesh network size and percentage of link faults. The results show that in the event of link failures the proposed algorithm routes the data from source to destination flawlessly.
Experimental validation of a distribution theory based analysis of the effect of manufacturing tolerances on permanent magnet synchronous machines
2017
An experimental study on the effect of permanent magnet tolerances on the performances of a Tubular Linear Ferrite Motor is presented in this paper. The performances that have been investigated are: cogging force, end effect cogging force and generated thrust. It is demonstrated that: 1) the statistical variability of the magnets introduces harmonics in the spectrum of the cogging force; 2) the value of the end effect cogging force is directly linked to the values of then remanence field of the external magnets placed on the slider; 3) the generated thrust and its statistical distribution depend on the remanence field of the magnets placed on the translator.
An Augmented Reality (AR) CAD System at Construction Sites
2011
Augmented Reality (AR) technologies allow computer-generated content to be superimposed over a live camera view of the real world. Although AR is still a very promising technology, currently only a few commercial applications for industrial purposes exploit the potential of adding contextual content to real scenarios. Most of AR applications are oriented to fields such as education or entertainment, where the requirements in terms of repeatability, fault tolerance, reliability and safety are low. Different visualization devices, tracking methods and interaction techniques are described in the literature, establishing a classification between Indoor and Outdoor AR systems. On the one hand, t…