Search results for "experimentation"

Random Slicing: Efficient and Scalable Data Placement for Large-Scale Storage Systems

2014

The ever-growing amount of data requires highly scalable storage solutions. The most flexible approach is to use storage pools that can be expanded and scaled down by adding or removing storage devices. To make this approach usable, it is necessary to provide a solution to locate data items in such a dynamic environment. This article presents and evaluates the Random Slicing strategy, which incorporates lessons learned from table-based, rule-based, and pseudo-randomized hashing strategies and is able to provide a simple and efficient strategy that scales up to handle exascale data. Random Slicing keeps a small table with information about previous storage system insert and remove operations…

Cilvēka dzīvības radīšanas un pārtraukšanas bioētiskie aspekti

2005

Modeling of out-of-plane behavior of masonry walls

2009

The flexural behavior of rectangular masonry sections is investigated by considering nonlinear stress-strain in compression and limited-tension material. A preliminary analysis shows that, with variation in the parameters specializing with the adopted conventional constitutive law, the experimentally observed behavior of different kinds of masonry materials can be approximated. Subsequently, moment-curvature dimensionless curves are derived numerically by satisfying the equilibrium equations of the section. In the case of negligible tensile strength these curves exhibit a typical shape that can be approximated by analytical expressions; consequently, suitable functions are proposed that are…

Engineering multi-agent systems: State of affairs and the road ahead

2019

International audience; The continuous integration of software-intensive systems together with the ever-increasing computing power offer a breeding ground for intelligent agents and multi-agent systems (MAS) more than ever before. Over the past two decades, a wide variety of languages, models, techniques and methodologies have been proposed to engineer agents and MAS. Despite this substantial body of knowledge and expertise, the systematic engineering of large-scale and open MAS still poses many challenges. Researchers and engineers still face fundamental questions regarding theories, architectures, languages, processes, and platforms for designing, implementing, running, maintaining, and e…

The Development of a new Philosophy of Physics in the 18th Century

2012

The study of books on physics published in the 18th century shows that the evolution since the 17th century is much more than just a furthering of the discoveries of Newton, as we often tend to present it these days. Descartes’s mechanistic physics, severely criticized by Newton, was to develop with help from many scientists, particularly from the Academy of Sciences in Paris. The discussions between Cartesians and Newtonians did not end in the 1740’s. This real scientific duel, which lasted over half a century, was the heart of a broader way of thinking about physics which operated on several levels: Mathématization, Concepts, définitions, laws, the role of experimentation and hypotheses, …

Continuous experimentation on artificial intelligence software : a research agenda

2020

Moving from experiments to industrial level AI software development requires a shift from understanding AI/ ML model attributes as a standalone experiment to know-how integrating and operating AI models in a large-scale software system. It is a growing demand for adopting state-of-the-art software engineering paradigms into AI development, so that the development efforts can be aligned with business strategies in a lean and fast-paced manner. We describe AI development as an “unknown unknown” problem where both business needs and AI models evolve over time. We describe a holistic view of an iterative, continuous approach to develop industrial AI software basing on business goals, requiremen…

Methanol fuel processor and PEM fuel cell modeling for mobile application

2010

International audience; The use of hydrocarbon fed fuel cell systems including a fuel processor can be an entry market for this emerging technology avoiding the problem of hydrogen infrastructure. This article presents a 1 kW low temperature PEM fuel cell system with fuel processor, the system is fueled by a mixture of methanol and water that is converted into hydrogen rich gas using a steam reformer. A complete system model including a fluidic fuel processor model containing evaporation, steam reformer, hydrogen filter, combustion, as well as a multi-domain fuel cell model is introduced. Experiments are performed with an IDATECH FCS1200™ fuel cell system. The results of modeling and experi…

Problematiche di percorso e di collegamento: “una idea antica, buona per il futuro”

2011

Il legno fa parte della storia dell’uomo, della sua evoluzione sociale e culturale, fin dalle costruzioni su palafitte, che esprimono un’architettura primordiale fondata su due elementi strutturali fondamentali: colonna e architrave, verticale e orizzontale. È questa una idea antica, buona per il futuro, che vede e ricerca l’innovazione a partire dal gesto primordiale che gli antichi praticavano nel gettare un semplice tronco d’albero tra due sponde per oltrepassare un fiume. In questo senso, il legno ritorna ad essere il migliore materiale per la realizzazione di strutture di collegamento, di passerelle pedonali, come quella necessaria a “collegare” la Via Sacra nella Valle dei Templi di …

Periodontal impact of surgically induced dental lesions in mandibular osteodistraction: An animal study.

2009

SUMMARY. Aim: The objective of the study was to evaluatethe impact of dental lesions on the periodontium, in a canine model of mandibular osteodistraction. Material and methods: In six adult male Beagle dogs, an osteotomy was made between the right second lateral incisor and canine, and a distraction device placed. The roots adjacent to the osteotomy were deliberately damaged by the reciprocating saw and chisel, with preservation of the attached gingiva. The osteodistraction protocol used was: latency of 7 days, rate of distraction 1 mm per day, and rhythm once a day for 5 days. Vital staining was carried out with tetracycline, Xylenol Orange and Calcein Green. The dogs were sacrificed afte…

Intravitreal Docosahexaenoic Acid in a Rabbit Model: Preclinical Safety Assessment

2014

PurposeThe purpose of the present study was to evaluate the retinal toxicity of a single dose of intravitreal docosahexaenoic acid (DHA) in rabbit eyes over a short-term period.MethodsSixteen New Zealand albino rabbits were selected for this pre-clinical study. Six concentrations of DHA (Brudy Laboratories, Barcelona, Spain) were prepared: 10 mg/50 µl, 5 mg/50 µl, 2'5 mg/50 µl, 50 µg/50 µl, 25 µg/50 µl, and 5 µg/50 µl. Each concentration was injected intravitreally in the right eye of two rabbits. As a control, the vehicle solution was injected in one eye of four animals. Retinal safety was studied by slit-lamp examination, and electroretinography. All the rabbits were euthanized one week a…