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  • 1
    In: The International Journal of Medical Robotics and Computer Assisted Surgery, Wiley, Vol. 19, No. 5 ( 2023-10)
    Abstract: The current study proposes simple methods for assessing the performance of robotic devices intended for Magnetic Resonance Imaging (MRI)‐guided needle biopsy. Methods In‐house made agar‐based breast phantoms containing biopsy targets served as the main tool in the evaluation process of an MRI compatible positioning device comprising a needle navigator. The motion accuracy of mechanical stages was assessed by calliper measurements. Laboratory evaluation of needle targeting included a repeatability phantom test and a laser‐based method. The accuracy and repeatability of needle targeting was also assessed by MRI. Results The maximum error of linear motion for steps up to 10 mm was 0.1 mm. Needle navigation relative to the phantom and alignment with the various biopsy targets were performed successfully in both the laboratory and MRI settings. The proposed biopsy phantoms offered tissue‐like signal in MRI and good haptic feedback during needle insertion. Conclusions The proposed methods could be valuable in the process of validating the accuracy of MRI‐guided biopsy robotic devices in both laboratory and real environments.
    Type of Medium: Online Resource
    ISSN: 1478-5951 , 1478-596X
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2156187-4
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  • 2
    Online Resource
    Online Resource
    Wiley ; 2019
    In:  Computer Animation and Virtual Worlds Vol. 30, No. 3-4 ( 2019-05)
    In: Computer Animation and Virtual Worlds, Wiley, Vol. 30, No. 3-4 ( 2019-05)
    Abstract: Real‐time three‐dimensional (3D) pose estimation is of high interest in interactive applications, virtual reality, activity recognition, and most importantly, in the growing gaming industry. In this work, we present a method that captures and reconstructs the 3D skeletal pose and motion articulation of multiple characters using a monocular RGB camera. Our method deals with this challenging, but useful, task by taking advantage of the recent development in deep learning that allows two‐dimensional (2D) pose estimation of multiple characters and the increasing availability of motion capture data. We fit 2D estimated poses, extracted from a single camera via OpenPose, with a 2D multiview joint projections database that is associated with their 3D motion representations. We then retrieve the 3D body pose of the tracked character, ensuring throughout that the reconstructed movements are natural, satisfy the model constraints, are within a feasible set, and are temporally smooth without jitters. We demonstrate the performance of our method in several examples, including human locomotion, simultaneously capturing of multiple characters, and motion reconstruction from different camera views.
    Type of Medium: Online Resource
    ISSN: 1546-4261 , 1546-427X
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2139568-8
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  • 3
    Online Resource
    Online Resource
    Wiley ; 2016
    In:  Journal of Food Science Vol. 81, No. 1 ( 2016-01)
    In: Journal of Food Science, Wiley, Vol. 81, No. 1 ( 2016-01)
    Abstract: The findings of this work are helpful for the manufacturer, who wants to develop saffron based preparations that will satisfy consumer senses but considers bitter taste of saffron, due to the presence of picrocrocin, as a limiting factor.
    Type of Medium: Online Resource
    ISSN: 0022-1147 , 1750-3841
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2006705-7
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  • 4
    Online Resource
    Online Resource
    Wiley ; 2018
    In:  Journal of Chemical Technology & Biotechnology Vol. 93, No. 12 ( 2018-12), p. 3374-3385
    In: Journal of Chemical Technology & Biotechnology, Wiley, Vol. 93, No. 12 ( 2018-12), p. 3374-3385
    Abstract: The minerals industry is increasingly being forced by regulatory and cost pressures to reduce the amount of liquid acidic waste they produce. This requires a strong focus on waste reduction by recycling, regeneration and reuse. Four mineral acids were examined for recovery from waste acidic solutions including H 2 SO 4 , HNO 3 , HCl, and H 3 PO 4 . The selection of the optimal extractant for acid recovery was based on extraction, stripping and scrubbing efficiencies. The extractants suitable for the recovery of H 2 SO 4 and HCl are in the order of TEHA 〉 Cyanex 923 〉 TBP 〉 Alamine 336. TEHA has the highest degree of acid extraction and stripping compared with Cyanex 923 and almost 99% of the acid can be stripped. Alamine 336 can extract higher acid (for H 2 SO 4 and HCl systems) than Cyanex 923 and TBP. However loaded acid for Alamine 336 system cannot be stripped using water at 60°C. For the recovery of nitric and phosphoric acids from acidic waste effluents, TBP was the best option. This work clearly demonstrates that extractant suitable for acid extraction may not be suitable for its recovery. However such extractant may be applied for the removal of acid from any waste acidic solution sacrificing the back extraction of the loaded acid. The effective implementation of options for acid recovery was examined to improve sustainability in the mineral industry. © 2018 Society of Chemical Industry
    Type of Medium: Online Resource
    ISSN: 0268-2575 , 1097-4660
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1479465-2
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  • 5
    In: Materials and Corrosion, Wiley, Vol. 72, No. 7 ( 2021-07), p. 1243-1248
    Abstract: The effect of electropulsing on the corrosion cracking of titanium aluminide produced by self‐propagating high‐temperature synthesis has been investigated. The electropulsing treatment led to improved corrosion resistance in sodium fluoride solution and also eliminated corrosion cracking at the α 2 /γ interface during corrosion in a solution of nitric and hydrofluoric acids. This behavior was attributed to thermal and athermal effects resulting from electropulsing and leading to the interaction of conduction electrons with the defect structure. The effect of magnetic field accompanying electropusling on depinning of dislocations also has been discussed. Support for this is provided on the basis of X‐ray diffraction analysis and microhardness testing.
    Type of Medium: Online Resource
    ISSN: 0947-5117 , 1521-4176
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1481051-7
    detail.hit.zdb_id: 1224916-6
    detail.hit.zdb_id: 202688-0
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  • 6
    Online Resource
    Online Resource
    Wiley ; 2015
    In:  Computer Graphics Forum Vol. 34, No. 6 ( 2015-09), p. 262-276
    In: Computer Graphics Forum, Wiley, Vol. 34, No. 6 ( 2015-09), p. 262-276
    Abstract: The increasing availability of large motion databases, in addition to advancements in motion synthesis, has made motion indexing and classification essential for better motion composition. However, in order to achieve good connectivity in motion graphs, it is important to understand human behaviour; human movement though is complex and difficult to completely describe. In this paper, we investigate the similarities between various emotional states with regards to the arousal and valence of the Russell's circumplex model. We use a variety of features that encode, in addition to the raw geometry, stylistic characteristics of motion based on Laban Movement Analysis (LMA). Motion capture data from acted dance performances were used for training and classification purposes. The experimental results show that the proposed features can partially extract the LMA components, providing a representative space for indexing and classification of dance movements with regards to the emotion. This work contributes to the understanding of human behaviour and actions, providing insights on how people express emotional states using their body, while the proposed features can be used as complement to the standard motion similarity, synthesis and classification methods.
    Type of Medium: Online Resource
    ISSN: 0167-7055 , 1467-8659
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 1482655-0
    detail.hit.zdb_id: 246488-3
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  • 7
    In: Journal of the American Ceramic Society, Wiley, Vol. 97, No. 12 ( 2014-12), p. 3835-3842
    Abstract: This work deals with the design, the characterization, and testing of a novel glass‐ceramic to be used as sealant for planar solid oxide fuel cells and its compatibility with Mn 1.5 Co 1.5 O 4 ‐coated Crofer22 APU . Thermal, sintering, and crystallization behavior and thermo mechanical properties of the sealant are reviewed and discussed, indicating therefore that these compositions can be deposited at 850°C and provide an excellent compatibility with both the Mn 1.5 Co 1.5 O 4 ‐coated Crofer22 APU and the anode‐supported electrolyte. In particular, Mn 1.5 Co 1.5 O 4 ‐coated Crofer22 APU /sealant/anode‐supported‐electrolyte joined samples have been submitted to thermal tests (in air atmosphere) from RT to 800°C ( SOFC operating temperature) up to 500 h. No interactions, cracks formation, or failure were observed at the Mn 1.5 Co 1.5 O 4 ‐coated Crofer22 APU /sealant interface and between the glass‐ceramic and the anode‐supported‐electrolyte after 500 h of thermal tests in air atmosphere.
    Type of Medium: Online Resource
    ISSN: 0002-7820 , 1551-2916
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 2008170-4
    detail.hit.zdb_id: 219232-9
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  • 8
    Online Resource
    Online Resource
    Wiley ; 2016
    In:  Computer Animation and Virtual Worlds Vol. 27, No. 1 ( 2016-01), p. 35-57
    In: Computer Animation and Virtual Worlds, Wiley, Vol. 27, No. 1 ( 2016-01), p. 35-57
    Abstract: Forward and Backward Reaching Inverse Kinematics (FABRIK) is a recent iterative inverse kinematics solver that became very popular because of its simplicity, convergence speed and control performance, especially in models with multiple end effectors. In this paper, we extend and/or adjust FABRIK to be used in problems with leaf joints and closed‐loop chains and to control a fixed inter‐joint distance in a kinetic chain with unsteady data. In addition, we provide optimisation solutions when the target is unreachable and a proof of convergence when a solution is available. We also present various techniques for constraining anthropometric and robotic joint models using FABRIK and provide clarifications and solutions to many questions raised since the first publication of FABRIK. Finally, a human‐like model that has been structured hierarchically and sequentially using FABRIK is presented, utilising most of the suggested joint models; it can efficiently trace targets in real time, without oscillations or discontinuities, verifying the effectiveness of FABRIK. Copyright © 2015 John Wiley & Sons, Ltd.
    Type of Medium: Online Resource
    ISSN: 1546-4261 , 1546-427X
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2139568-8
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  • 9
    Online Resource
    Online Resource
    Wiley ; 2022
    In:  International Journal of Applied Ceramic Technology Vol. 19, No. 2 ( 2022-03), p. 1017-1028
    In: International Journal of Applied Ceramic Technology, Wiley, Vol. 19, No. 2 ( 2022-03), p. 1017-1028
    Abstract: A summary and update of the research on the design, process, and testing of glass and glass‐ceramic to metal seals for solid oxide cells (SOC) conducted during the last 13 years at the Politecnico di Torino, Italy, within our research group and with several international collaborations, is presented and discussed. Glass and glass‐ceramic‐based materials play a key role in SOC performance and durability as well as in the sealing and joining of metallic interconnects. The sinter‐crystallization method is a powerful technique that is used to obtain dense and reliable glass‐ceramics capable of providing hermetic joining and seals. The issues, learned from our experience, that have an impact on the lifetime behavior of glass and glass‐ceramic to metal seals are briefly reviewed in terms of challenges and working conditions. The mechanical characterization of glass‐to‐metal seal materials has a crucial impact on the overall performance, as the metal–glass interface plays a key role on the final joining strength and reliability. Several glass compositions are presented along with results on their characterization and behavior as joining materials for metallic interconnects, with a focus on their potential use as SOC seals.
    Type of Medium: Online Resource
    ISSN: 1546-542X , 1744-7402
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2167226-X
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