1,355,098 research outputs found
Case Study: Gesture and posture recognition using WSN
No full textAdvances in embedded systems have made it possible to design wireless sensor networks that are tiny, low-power, wearable and hence suitable for bio-monitoring. This case study proposes a short overview of possible solutions and uses of an inertial-based wireless sensor node called WiMoCA, (Farella et al. 2005), both for use alone or in a body area network to track gestures and movements for different purposes. Thanks to the flexibility of WiMoCA architecture, it was possible to implement a different node along with the ones known as 3dID glove nodes, dedicated to hand movement tracking. The general scenario is one of ambient intelligence where gestures and movements can be used as natural interfaces for humanmachine
interaction. Moreover, movement, posture and gait tracking may be the keys to understanding user behaviour and thus enabling seamless provision, in a smart environment, of context-aware services such as domotic applications and remote medical monitoring
Case Study: Gesture and posture recognition using WSN
No full textAdvances in embedded systems have made it possible to design wireless sensor networks
that are tiny, low-power, wearable and hence suitable for bio-monitoring. This case study
proposes a short overview of possible solutions and uses of an inertial-based wireless sensor
node called WiMoCA, (Farella et al. 2005), both for use alone or in a body area network to
track gestures and movements for different purposes. Thanks to the flexibility of WiMoCA
architecture, it was possible to implement a different node along with the ones known as 3dID
glove nodes, dedicated to hand movement tracking. The general scenario is one of ambient
intelligence where gestures and movements can be used as natural interfaces for humanmachine
interaction. Moreover, movement, posture and gait tracking may be the keys to
understanding user behaviour and thus enabling seamless provision, in a smart environment,
of context-aware services such as domotic applications and remote medical monitoring
SOFIA - Smart Objects for Intelligent Applications
No full textProgetto Artemis, Prima Call, 2009-11, Coordinatore Nokia, 19 partners, costi preventivati circa 35 ME, costi preventivati Unibo circa 1.1 ME. Obiettivo: piattaforma interoperabile per servizi basati sul paradigma "space based computing". Partecipano sei gruppi di ricerca di Unibo, i cui referenti sono: Paolo Bellavista, Luigi Di Stefano, Alessandra Costanzo, Luciano Bononi, Elisabetta Farella, Tullio Salmon Cinotti. Quest'ultimo svolge il ruolo di coordinatore dell'Unità dell'Università di Bologna
A Wireless Body Area Sensor Network for Posture Detection
No full textBody Area Sensor Networks (BASN) are an emerging technology enabling the design of natural Human Computer Interfaces (HCI) in the context of Ambient Intelligence. This class of interactive applications poses new challenges on sensor network design that are hard to be faced using traditional solutions optimized for environmental monitoringlike applications. In this paper we present a novel solution for wireless and wearable posture recognition based on a custom-designed wireless body area sensor network, called WiMoCA. Nodes of the network, mounted on different parts of the human body, exploit tri-axial accelerometers to detect body postures. Afterwards we discuss results of interactive performance and power consumption optimizations required to match application constraints
Inertial sensors for Wireless Body Area Networks: the WiMoCA Solution
No full textST JOURNAL OF RESEARC
Immediately restored one-piece single-tooth implants with reduced diameter: one-year results of a multi-center study
No full textObjectives: The aim of the present multi-center study was to evaluate the treatment outcome of immediately restored one-piece single-tooth implants with a diameter of 3 mm after 1 year.
Material and methods: A total of 57 one-piece implants (NobelDirect® 3.0) were inserted in 47 patients (26 females, 21 males) with a mean age of 31 years (range: 17–76 years) at five different centers. The implants replaced maxillary lateral incisors and mandibular incisors. The implants were placed either in conjunction with tooth extraction or in healed sites, and all implants were immediately restored with a provisional resin crown. If needed, the abutment part of the implant was prepared before crown cementation. The permanent crown was placed after 1.9–14.5 months. Radiographs were taken at implant insertion as well as after 6 and 12 months to evaluate the peri-implant marginal bone level and bone loss. Moreover, plaque, bleeding on probing and complications were assessed.
Results: A total of 44 patients (23 females, 21 males) with 54 implants were available for the 1-year follow-up. One implant was lost, thus the 1-year implant survival was 98%. A statistically significant mean marginal bone loss was observed between baseline and 6 months (1.1 mm, range: −0.7 to 4.4 mm; n=49) and between baseline and 12 months (1.6 mm, range: −0.8 to 4.6 mm; n=50). A total of 18% of the implants were characterized by a bone loss of more than 3 mm. No bleeding on probing was observed around 83% of the implants. Plaque was registered at 15% of the implants. The most common complications were related to the provisional crown, i.e. fracture (n=3) and loss of retention (n=3).
Conclusions: A high 1-year implant survival was observed in the present study. However, the excessive peri-implant marginal bone loss around several implants indicates that this implant should be used with caution until further studies have been conducted.
To cite this article: Zembić A, Johannesen LH, Schou S, Malo P, Reichert T, Farella M, Hämmerle CHF. Immediately restored one-piece single-tooth implants with reduced diameter: one-year results of a multi-center stu
A fast interactive reverse-engineering system
No full textA new method of reverse engineering for fast, simple and interactive acquisition and reconstruction of
a virtual three-dimensional (3D) model is presented. We propose an active stereo acquisition system,
whichmakes use of two infrared cameras and awireless active-pen device, supported by a reconstruction
method based on subdivision surfaces. In the 3D interactive hand sketching process the user draws and
refines the 3D style-curves, which characterize the shape to be constructed, by simply dragging the
active-pen device; then the systemautomatically produces a low-resolutionmesh that is naturally refined
through subdivision surfaces. Several examples demonstrate the ability of the proposed advanced design
methodology to produce complex 3D geometric models by the interactive and iterative process that
provides the user with a real-time visual feedback on the ongoing work
6) Farella M., Michelotti A., Steenks M.H., Cimino R., Romeo R., Bosman F. The diagnostic value of pressure algometry in myofascial pain of the jaw muscl
No full text6) Farella M., Michelotti A., Steenks M.H., Cimino R., Romeo R., Bosman F. The diagnostic value of pressure algometry in myofascial pain of the jaw muscl
No full textA regional assessment of cumulative impact mapping on Mediterranean coralligenous Outcrops
No full textIn the last decade, the 'Cumulative Pressure and Impact Assessment' (CPIA) approach emerged as a tool to map expected impacts on marine ecosystems. However, CPIA assumes a linear response of ecosystems to increasing level of cumulative pressure weighting sensitivity to different anthropogenic pressures through expert judgement. We applied CPIA to Mediterranean coralligenous outcrops over 1000 km of the Italian coastline. Extensive field surveys were conducted to assess the actual condition of coralligenous assemblages at varying levels of human pressure. As pressure increased, a clear shift from bioconstructors to turf-dominated assemblages was found. The linear model originally assumed for CPIA did not fit the actual relationship between expected cumulative impact versus assemblage degradation. A log-log model, instead, best fitted the data and predicted a different map of cumulative impact in the study area able to appreciate the whole range of impact scenarios. Hence, the relative importance of different drivers in explaining the observed pattern of degradation was not aligned with weights from the expert opinion. Such findings stress the need for more incisive efforts to collect empirical evidence on ecosystem-specific responses to human pressure in order to refine CPIA predictions
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