1,721,185 research outputs found
Lodi (M.) : L’enfance en liberté. Paris ; Gallimard ; 1972
No full textTurbiaux Marcel. Lodi (M.) : L’enfance en liberté. Paris ; Gallimard ; 1972. In: Bulletin de psychologie, tome 25 n°301, 1972. Psychologie de l'enfant. p. 965
Correction to: Computational Thinking, Between Papert and Wing (Science & Education, (2021), 30, 4, (883-908), 10.1007/s11191-021-00202-5)
No full textThe original version of this article unfortunately contains unmatched footnote references and footnote text Reference 9: should point to the text in footnote 35 Reference 10: should point to the text in footnote 9 Reference 11: should point to the text in footnote 10 Reference 12: should point to the text in footnote 11 Reference 13: should point to the text in footnote 12 Reference 14: should point to the text in footnote 13 Reference 15: should point to the text in footnote 14 Reference 16: should point to the text in footnote 15 Reference 17: should point to the text in footnote 16 Reference 18: should point to the text in footnote 17 Reference 20: should point to the text in footnote 18 Reference 21: should point to the text in footnote 36 Reference 22: should point to the text in footnote 20 Reference 23: should point to the text in footnote 21 Reference 25: should point to the text in footnote 22 Reference 26: should point to the text in footnote 23 Reference 27: should point to the text in footnote 37 Reference 28: should point to the text in footnote 25 Reference 29: should point to the text in footnote 26 Reference 30: should point to the text in footnote 27 Reference 31: should point to the text in footnote 28 Reference 32: should point to the text in footnote 29 Reference 33: should point to the text in footnote 30 Reference 34: should point to the text in footnote 31 Reference 35: should point to the text in footnote 32 Reference 36: should point to the text in footnote 33 Reference 37: should point to the text in footnote 34 The original article has been corrected
Online estimation of the current ripple on a saturating Ferrite-core inductor in a boost converter
No full textIn this paper, a nonlinear observer is proposed for the estimation of the current ripple in a ferrite-core inductor working in partial saturation, mounted on a boost converter. The estimator is based on a recently proposed nonlinear inductance model, which expresses the inductance as a function of the inductor current, taking into account also the non-negligible effects of the core temperature. The proposed observer is implemented on a low-cost microcontroller and tested, both offline and online, on a real boost converter with different operating conditions. The offline tests show a satisfactory estimation accuracy both during the electrical (fast) and thermal (slow) transients. Due to the high microcontroller latency, some delays and inaccuracies occur during electrical transients in the online tests. This work suggests that, in order to exploit the observer for control purposes, the target architecture should be a high-performance microcontroller, a system-on-chip, or a field programmable gate array, where parallelism can be exploited to speed-up the computations. The proposed implementation can be instead suitable for switch-mode power supply (SMPS) monitoring purposes
Theoretical Considerations for the Design of Magnetic Scaffolds for Bone Tumor Hyperthermia
No full textThe effectiveness and the quality of the hyperthermia treatment of bone tumors using magnetic implants can be improved. To date, several biocompatible biomaterials loaded with magnetic nanoparticles have been manufactured and characterized. However, the intrinsic parameters of the so-called magnetic scaffolds are not tuned to perform an optimum hyperthermia treatment. This work, for the firs time, deals with the theoretical modeling of bone tumor hyperthermia using magnetic scaffolds. The goal is to investigate the heating abilities of a synthetic, virtual set of potential implants. The analysis is oriented in identifying the most essential features and relevant parameters for providing unique, useful feedbacks, form an electromagnetic engineering point of view, to material scientists and clinicians
Challenging the Modeling of Magnetic Hyperthermia of Secondary Bone Tumors Using Magnetic Prosthetic Implants
No full textMagnetic biomaterials are powerful multifunctional tools in theranostic. They can be remotely controlled by an external magnetic field. When a radiofrequency field is used, the magnetic nano- or microparticles embedded in the biomaterial dissipate heat, which can be used for therapeutic purposes. Hyperthermia treatment of deep- seated tumors, such as bone cancers, can extensively benefit from the use of such class of magnetic responsive biomaterials. Therefore, in this work it is presented the numerical analysis of the hyperthermia treatment of secondary bone tumors performed using a magnetic hydroxyapatite prosthesis
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Design and simulation of a RF resonant reactor for biochemical reactions
Full text linkIn this work the development of a multi-tube reactor for chemical processing, running in a microwave irradiated field, is presented. Considering the need of operating with well-known and reproducible experimental conditions, the aim was to design a resonant cavity inside which the tubes with the fluid to be processed are positioned. The irradiated fluid is exposed to constant microwave power since the system works in resonance conditions, therefore the field intensity and power absorption can be accurately calculated and mapped. The cavity was designed by the authors using proper commercial software for 3D electromagnetic simulation, and then the reactor operation was tested by another commercial multiphysics simulation software. The results here presented show the proper geometrical characteristics of the cavity and of the internal tubes to work at 2.45 GHz of frequency while the irradiation power can be varied depending on the needs of the process. The reactor can work with different homogeneous systems, both chemical and biological (enzyme reactions). The future development will be the construction and the real operation of the designed apparatus in order to confirm the simulation results
Lussazione bipolare della clavicola. Descrizione di un caso e revisione della letteratura
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