196,045 research outputs found
Spin density and state of order in the alloy Ni78Mn22
No full textThe experimentally measured spin density of a partially ordered Ni78Mn22 alloy is used to study the magnetic state of Mn within an fcc environment. The present data, together with those obtained by Petrillo, Sacchetti, and Scafi [Phys. Rev. 44, 9418 (1991)), are used to determine the form factor and magnetic moment of the Mn atoms in various atomic configurations. It is found that Mn carries a magnetic moment with fluctuating spin, while an appreciable charge transfer from Mn to Ni is suggested
Low-code design of collective systems with ScaFi-Blocks
No full textScaFi-Blocks is a visual, low-code programming environment for designing and implementing swarm algorithms. Built on the ScaFi aggregate computing framework and the Blockly visual programming library, ScaFi-Blocks enables users to visually compose algorithms using intuitive building blocks, abstracting away the complexities of traditional swarm programming frameworks. This approach simplifies the development of collective behaviours for a wide range of swarm systems, including robot swarms, IoT device ensembles, and sensor networks, fostering broader accessibility and innovation within the field. This contribution bridges the gap between visual programming and textual code, lowering the barrier to entry for non-experts while promoting a deeper understanding of aggregate computing principles
Spin density in MnNi3.55: A magnetic state of fcc manganese
No full textThe magnetic structure factors determined using polarized-neutron scattering have been employed to analyze the magnetic-moment distribution of Mn in MnX3 alloys (X = Ni,Pt). In particular, a spin-density measurement in MnNi3.55 at a low degree of long-range order has been performed at room temperature. Results suggest that Mn is found in a high-magnetic-moment state in this class of compounds, independently of the system, thus indicating a small dependence of the magnetic state on the atomic volume. Furthermore, a rather direct evidence of the presence of Mn atoms having a negative magnetic moment is also obtained. The information, which can be derived on the electron distribution in fcc Mn, is also discussed in a phenomenological fashion
ScaFi-Web: A Web-Based Application for Field-Based Coordination Programming
No full textField-based coordination is a model for expressing the coordination logic of large-scale adaptive systems, composing functional blocks from a global perspective. As for any coordination model, a proper toolchain must be developed to support its adoption across all development phases. Under this point of view, the ScaFi toolkit provides a coordination language (field calculus) as a DSL internal in the Scala language, a library of reusable building blocks, and an infrastructure for simulation of distributed deployments. In this work, we enrich such a toolchain by introducing ScaFi-Web, a web-based application allowing in-browser editing, execution, and visualisation of ScaFi programs. ScaFi-Web facilitates access to the ScaFi coordination technology by flattening the learning curve and simplifying configuration and requirements, thus promoting agile prototyping of field-based coordination specifications. In turn, this opens the door to easier demonstrations and experimentation, and also constitutes a stepping stone towards monitoring and control of simulated/deployed systems
ScaFi-Blocks: A Visual Aggregate Programming Environment for Low-Code Swarm Design
No full textSwarm programming is focused on the design and implementation of algorithms for large-scale systems, such as fleets of robots, ensembles of IoT devices, and sensor networks. Writing algorithms for these systems requires skills and familiarity with programming languages, which can be a barrier for non-expert users. Even if visual programming environments have been proposed for swarm systems, they are often limited to specific platforms or tasks, and do not provide a high-level programming model that can be used to design algorithms for a wide range of swarm systems. Therefore, in this paper, we propose a low-code swarm programming environment, called ScaFi-Blocks, which allows users to design and implement swarm algorithms visually. ScaFi-Blocks is based on the ScaFi aggregate computing framework, which provides a high-level programming model for the design of distributed algorithms. Aggregate computing is based on the concept of field-based coordination, and it allows users to design algorithms by composing simple building blocks, which motivates the design of the proposed artefact. The environment is designed to be user-friendly and to support the design of a wide range of collective applications. In this paper, we present the architecture of ScaFi-Blocks, discuss its features and capabilities, and provide a preliminary evaluation of the programming environment based on a case study featuring articulated swarm behaviour
Alessandro Scafi (éd.), The Cosmography of Paradise : The Other World from Ancient Mesopotamia to Medieval Europe
No full textLa notion de paradis, présente de façon plus ou moins affirmée dans toutes les cultures influencées par le Moyen Orient, est examinée dans cet ouvrage en une suite de monographies introduites par Alessandro Scafi. Sont ainsi successivement présentés la Mésopotamie ancienne (M. J. Geller), l’Iran pré-islamique (A. C. D. Panaino), les débuts de la cosmographie juive (A. Y. Reed), les paradis de la Gnose (E. Thomassen), le dualisme médiéval et ses origines juives (Y. Stoyanov), les conceptions d..
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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