2,149 research outputs found
Educational paradigms and mobilization of interactive methodologies with a focus on learning: the use of TIDC for learning to learn / Paradigmas educacionais e mobilização de metodologias interativas com foco na aprendizagem: o uso do TIDC para aprender a aprender
The present work portrays a research on learning styles, with emphasis on what is in fact "concentrating" and "paying attention. "The objective is to show that clear, contextualized and diversified classes, based on the use of TIDCs (Digital Information and Communication Technologies) attract attention and addresses the five most important secrets for students to learn, considering the break with various educational paradigms and mobilization of more interactive methodologies. The study seeks to encourage the use of technologies based on four foundations: awakening curiosity, learning styles, study techniques and the use of TIDCs in the classroom. The discussion and results are based on Law 9394/96 that instructs the teacher to ensure student learning by creating a student / teacher relationship, capable of making the teacher take care of the student in its fullness and equity. The teacher should accept the student as he is, however, develop his / her abilities, be it kinesthetic, auditory or visual. Being the determinant role of the teacher under the students' learning, this one has the task of identifying how each student learns, valuing the identity of each individual as to their way of seeing the world. Only in this way, curiosity will arouse students' interest and learning. When doing a diagnostic evaluation, this result is an indicator, which demonstrates the need to diversify the way of teaching to reach in the student audience: attention and concentration.Â
Intraoperative β-Detecting probe for radio-guided surgery in tumour resection
The development of the β− based radio-guided surgery aims to extend the technique to those tumours where surgery is the only possible treatment and the assessment of the resection would most profit from the low background around the lesion, as for brain tumours. Feasibility studies on meningioma and gliomas already estimated the potentiality of this new treatment. To validate the technique, a prototype of the intraoperative probe detecting β− decays and specific phantoms simulating tumour remnant patterns embedded in healthy tissue have been realized. The response of the probe in this simulated environment is tested with dedicated procedures. This document discusses the innovative aspects of the method, the status of the developed intraoperative β− detecting probe and the results of the preclinical tests
An Intraoperative Detecting Probe For Radio-Guided Surgery in Tumour Resection
The development of the based radio-guided surgery aims to extend
the technique to those tumours where surgery is the only possible treatment and
the assessment of the resection would most profit from the low background
around the lesion, as for brain tumours. Feasibility studies on meningioma,
glioma, and neuroendocrine tumors already estimated the potentiality of this
new treatment. To validate the technique, prototypes of the intraoperative
probe required by the technique to detect radiation have been
developed. This paper discusses the design details of the device and the tests
performed in laboratory. In such tests particular care has to be taken to
reproduce the surgical field conditions. The innovative technique to produce
specific phantoms and the dedicated testing protocols is described in detail.Comment: 7 pages, 15 figure
Integrated Soybean Biorefinery
The concept of biorefinery is analogous to that of petroleum refineries, but it uses renewable raw materials. However, the main objective of the biorefinery is to transform renewable agricultural materials into numerous and different commercially applicable products, allowing a viable economic competitiveness to traditional petrochemical refineries. In this chapter, we present a proposal for a biorefinery integrated from soybean as raw material, demonstrating its potential in this sector. In addition, special focus was given to the high value-added products present in the soybean oil deodorizer distillate (SODD), such as tocopherol, fatty acids, and squalene, which can be applied in the food, pharmacy, and cosmetic industries. In conclusion, the use of soybean raw material as a biomass in a biorefinery presents numerous environmental and economic advantages as high value-added products are formed. It is important to highlight that in this highly evolved integrated biorefinery model, the additional benefits of operational and administrative synergies will emerge over time
3D mandibular superimposition: Comparison of regions of reference for voxel-based registration
The aim was to evaluate three regions of reference (Björk, Modified Björk and mandibular Body) for mandibular registration testing them in a patients' CBCT sample.Mandibular 3D volumetric label maps were built from CBCTs taken before (T1) and after treatment (T2) in a sample of 16 growing subjects and labeled with eight landmarks. Registrations of T1 and T2 images relative to the different regions of reference were performed, and 3D surface models were generated. Seven mandibular dimensions were measured separately for each time-point (T1 and T2) in relation to a stable reference structure (lingual cortical of symphysis), and the T2-T1 differences were calculated. These differences were compared to differences measured between the superimposed T2 (generated from different regions of reference: Björk, Modified Björk and Mandibular Body) over T1 surface models. ICC and the Bland-Altman method tested the agreement of the changes obtained by nonsuperimposition measurements from the patients' sample, and changes between the overlapped surfaces after registration using the different regions of reference.The Björk region of reference (or mask) did work properly only in 2 of 16 patients. Evaluating the two other masks (Modified Björk and Mandibular body) on patients' scans registration, the concordance and agreement of the changes obtained from superimpositions (registered T2 over T1) compared to results obtained from non superimposed T1 and T2 separately, indicated that Mandibular Body mask displayed more consistent results.The mandibular body mask (mandible without teeth, alveolar bone, rami and condyles) is a reliable reference for 3D regional registration
Monitoring of hadrontherapy treatments by means of charged particle detection
The interaction of the incoming beam radiation with the patient body in hadrontherapy
treatments produces secondary charged and neutral particles, whose detection can be
used for monitoring purposes and to perform an on-line check of beam particle range. In
the context of ion-therapy with active scanning, charged particles are potentially attractive
since they can be easily tracked with a high efficiency, in presence of a relatively low
background contamination. In order to verify the possibility of exploiting this approach
for in-beam monitoring in ion-therapy, and to guide the design of specific detectors, both
simulations and experimental tests are being performed with ion beams impinging on
simple homogeneous tissue-like targets (PMMA). From these studies, a resolution of the
order of few millimeters on the single track has been proven to be sufficient to exploit
charged particle tracking for monitoring purposes, preserving the precision achievable
on longitudinal shape. The results obtained so far show that the measurement of charged
particles can be successfully implemented in a technology capable of monitoring both
the dose profile and the position of the Bragg peak inside the target and finally lead to
the design of a novel profile detector. Crucial aspects to be considered are the detector
positioning, to be optimized in order to maximize the available statistics, and the capability
of accounting for the multiple scattering interactions undergone by the charged
fragments along their exit path from the patient body. The experimental results collected
up to now are also valuable for the validation of Monte Carlo simulation software tools
and their implementation in Treatment Planning Software packages
Charged particle's flux measurement from PMMA irradiated by 80 MeV/u carbon ion beam
Hadrontherapy is an emerging technique in cancer therapy that uses beams of
charged particles. To meet the improved capability of hadrontherapy in matching
the dose release with the cancer position, new dose monitoring techniques need
to be developed and introduced into clinical use. The measurement of the fluxes
of the secondary particles produced by the hadron beam is of fundamental
importance in the design of any dose monitoring device and is eagerly needed to
tune Monte Carlo simulations. We report the measurements done with charged
secondary particles produced from the interaction of a 80 MeV/u fully stripped
carbon ion beam at the INFN Laboratori Nazionali del Sud, Catania, with a
Poly-methyl methacrylate target. Charged secondary particles, produced at
90 with respect to the beam axis, have been tracked with a drift
chamber, while their energy and time of flight has been measured by means of a
LYSO scintillator. Secondary protons have been identified exploiting the energy
and time of flight information, and their emission region has been
reconstructed backtracking from the drift chamber to the target. Moreover a
position scan of the target indicates that the reconstructed emission region
follows the movement of the expected Bragg peak position. Exploting the
reconstruction of the emission region, an accuracy on the Bragg peak
determination in the submillimeter range has been obtained. The measured
differential production rate for protons produced with 83 MeV and emitted at 90 with respect to the beam line is: .Comment: 13 pages, 9 figure
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