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51.
Francesco Basile Pasquale Chiacchio Domenico Del Grosso 《Control Engineering Practice》2012,20(12):1426-1437
Nowadays the low cost of wireless communications allows the real time monitoring of the state of manual-pick warehouse systems making possible the real time control of these systems. At this aim, an approach based on a two-level model is presented in this paper. At the lower level, Petri nets are used to build online a model representing the active missions state and to detect conflicts among resources. At the upper level, logical expressions are used to add constraints for a single mission or item. The model is proved to be effective for online monitoring, scheduling and rescheduling of warehouse activities. 相似文献
52.
Pasquale De Meo Giovanni Quattrone Domenico Ursino 《User Modeling and User-Adapted Interaction》2010,20(1):41-86
In this paper we propose a query expansion and user profile enrichment approach to improve the performance of recommender
systems operating on a folksonomy, storing and classifying the tags used to label a set of available resources. Our approach
builds and maintains a profile for each user. When he submits a query (consisting of a set of tags) on this folksonomy to
retrieve a set of resources of his interest, it automatically finds further “authoritative” tags to enrich his query and proposes
them to him. All “authoritative” tags considered interesting by the user are exploited to refine his query and, along with
those tags directly specified by him, are stored in his profile in such a way to enrich it. The expansion of user queries
and the enrichment of user profiles allow any content-based recommender system operating on the folksonomy to retrieve and
suggest a high number of resources matching with user needs and desires. Moreover, enriched user profiles can guide any collaborative
filtering recommender system to proactively discover and suggest to a user many resources relevant to him, even if he has
not explicitly searched for them. 相似文献
53.
Simonetta Fois Manuela Sanna Giuseppe Stara Tonina Roggio Pasquale Catzeddu 《European Food Research and Technology》2011,232(4):713-722
Four commercial semolinas and four low-grade semolinas (LGS) samples were used in this study to make flat crispy bread (Carasau).
The meals, doughs, and bread were compared with respect to a set of physical, chemical, and textural characteristics, and
the bread evaluated by a trained sensory panel. LGSs had a higher extraction rate (higher ash content), finer granularity,
and a higher damaged starch content than semolinas. The study revealed the key role of dry gluten content in determining hydration
capacity of the dough, whereas damaged starch affected water absorption only in semolina samples. Gluten index and the ratio
of gluten tenacity to extensibility (alveograph P/L) were significantly correlated with the weight of the dough discs following sheeting and molding. The panelists gave the
highest quality score to the bread with the highest values of crackling and hardness. Textural and sensory attributes were
both correlated with one another, and with gluten strength and tenacity, but not with the gluten content of the meal, which
only affected final moisture content of the bread. Meal samples with a more tenacious and elastic gluten were more suited
to produce flat crispy breads. The yellowness of durum wheat bread could not be predicted by measuring the color of the meal
with a reflectance method. 相似文献
54.
The growth and survival of Aeromonas hydrophila in three types of natural mineral waters were investigated. Mineral waters with different levels of mineral content (low, medium, and high) were experimentally contaminated with A. hydrophila, stored at different temperatures (10 degrees C and 20 degrees C), and analyzed at intervals over a 60-day period. Water samples that were not experimentally contaminated were investigated for indigenous A. hydrophila. The results confirmed that A. hydrophila may occur naturally in mineral waters and showed that the level of mineral content, temperature, length of storage, and, in some cases, the type of container used may favor the growth of A. hydrophila. The greatest proliferation was observed in water with a low mineral content stored in PET bottles at 10 degrees C, in which A. hydrophila peaked at day 28 (4.47 +/- 0.01 log CFU/100 ml). At 20 degrees C, the same load was observed at day 60. The presence of high densities of A. hydrophila in bottled mineral water can constitute a risk for some groups of consumers, such as elderly and immunocompromised persons. 相似文献
55.
Giovanni Semeraro Verner Andersen Hans H. K. Andersen Marco de Gemmis Pasquale Lops 《Universal Access in the Information Society》2008,7(3):179-194
The main contribution of this work is the design of an application framework based on both conversational agents and user
profiling technologies for the development of e-commerce services. User profiles are exploited by conversational agents to
help customers in retrieving potentially interesting products from a catalogue. Three techniques were used for collecting
data for a usability test: eye-movement tracking, questionnaire, and recording the user-system dialogue. The main outcomes
of the experimental sessions are: (1) the dialogue capabilities of the agent facilitate the interaction between the user and
the e-commerce site; and, (2) user profiles improve the retrieval capabilities of the agent. Finally, some limitations of
the user profiling techniques adopted in the framework are discussed and a more sophisticated content-based profiling technique
is proposed. 相似文献
56.
The AidB protein is involved in the adaptive response to DNA alkylation damages in Escherichia coli. Functional proteomic experiments were designed to elucidate AidB biological functions in the presence and in the absence of methyl methanesulfonate as methylating agent. Several proteins were identified in both conditions and according to their reported biological activities, the inter-actors were grouped into three different functional categories: stress response, energetic metabolic pathways and nucleic acid metabolism. Particularly, the interaction between AidB and UvrA, a member of the UvrABCD nucleotide excision system, suggested a new interesting putative role for AidB. 相似文献
57.
A measurement technique based on Electrical Impedance Spectroscopy (EIS) aimed at discriminating electrical effects of the electrical treatment from the electrical characteristics of drug delivery in human skin is presented. The technique turns out to be useful as the first and most crucial step in determining the drug delivered into the skin after electrical treatment. After recalling the background of electrical measurements principle and electrical modeling of biological tissues, the proposed measurement procedure is illustrated. Then, experimental tests of in vivo characterization of the procedure are reported, and the obtained results are discussed. 相似文献
58.
Francesco Basile Fabrizio Caccavale Pasquale Chiacchio Jolanda Coppola Alessandro Marino 《Mechatronics》2013,23(8):1100-1112
In this paper a two-layer decentralized framework for kinematic control of cooperative and collaborative multi-robot systems is developed. The motion of the system is specified at the workpiece level, by adopting a task-oriented formulation for cooperative tasks. The first layer computes the motion of the single arms in the system. In detail, the control unit of each robot computes the end-effector motion references in a decentralized fashion on the basis of the knowledge of the assigned cooperative task and the motion references computed by its neighbors. Then, in the second layer, each control unit computes the reference joint motion of the corresponding manipulator from the end-effector reference motion. The approach is, then, tested in simulation on a work-cell composed by several manipulators, and experimentally on a dual-arm kinematically redundant work-cell composed by industrial manipulators. 相似文献
59.
Buccafurri Francesco De Meo Pasquale Lax Gianluca Ursino Domenico Fugini Mariagrazia Modafferi Stefano Pernici Barbara Furnari Roberto Goy Anna Lops Pasquale Redavid Domenico Semeraro Giovanni 《Multimedia, IEEE》2009,16(1):26-35
An integrated approach to quality of service for content delivery using Web services includes quality definitions, user contracts, and fault monitoring. 相似文献
60.
David Clark Sebastian Hunt Pasquale Malacaria 《Electronic Notes in Theoretical Computer Science》2002,59(3)
Basic information theory is used to analyse the amount of confidential information which may be leaked by programs written in a very simple imperative language. In particular, a detailed analysis is given of the possible leakage due to equality tests and if statements. The analysis is presented as a set of syntax-directed inference rules and can readily be automated. 相似文献