Search results for "MeaNS"

K-means Clustering to Study How Student Reasoning Lines Can Be Modified by a Learning Activity Based on Feynman’s Unifying Approach

2017

Background:Research in Science Education has shown that often students need to learn how to identify differences and similarities between descriptive and explicative models. The development and use of explicative skills in the field of thermal science has always been a difficult objective to reach. A way to develop analogical reasoning is to use in Science Education unifying conceptual frameworks.Material and methods:A questionnaire containing six open-ended questions on thermally activated phenomena was administered to the students before instruction. A second one, similar but focused on different physical content was administered after instruction. Responses were analysed using k-means Cl…

Normal and Abnormal Tissue Classification in Positron Emission Tomography Oncological Studies

2018

Positron Emission Tomography (PET) imaging is increasingly used in radiotherapy environment as well as for staging and assessing treatment response. The ability to classify PET tissues, as normal versus abnormal tissues, is crucial for medical analysis and interpretation. For this reason, a system for classifying PET area is implemented and validated. The proposed classification is carried out using k-nearest neighbor (KNN) method with the stratified K-Fold Cross-Validation strategy to enhance the classifier reliability. A dataset of eighty oncological patients are collected for system training and validation. For every patient, lesion (abnormal tissue) and background (normal tissue around …

Los beneficios del mar: negocios e inversiones económicas de la oficialidad naval en el siglo XVIII

2019

Throughout the eighteenth century, the Spanish navy was extensively reformed and enhanced as a consequence of the new model of Monarchy that the Bourbons introduced. Among the measures adopted, it is remarkable the erection of the naval officers corps according to the needs and obligations that maritime war had in this century. This group becomes the paradigm of the new professionalization and new training approach, and its members had great relevance due to its great mobility around the empire and the power of the naval institution. This means that a part of the naval officers were placed in privileged positions and at the intersection of diverse political, social and economic networks. Th…

A hybrid algorithm for planning public charging stations

2014

International audience; Green mobility solutions are receiving currently an enormous attention. Indeed, during last years, electric vehicles, being part of the field of the smart-grid, entered the automobile market of the whole world. This technology requires an effective deployment of charging stations of electric refill since the main problem in this system remains over the duration of refill of the batteries. In this work, we propose an optimized algorithm to locate electric charging stations. The main task of the algorithm is to find the best site of charging stations locations so as to minimize loss on the way to the charging station, as well as minimize investment cost, we take into a…

Cluster-based RF fingerprint positioning using LTE and WLAN signal strengths

2017

Wireless Local Area Network (WLAN) positioning has become a popular localization system due to its low-cost installation and widespread availability of WLAN access points. Traditional grid-based radio frequency (RF) fingerprinting (GRFF) suffers from two drawbacks. First it requires costly and non-efficient data collection and updating procedure; secondly the method goes through time-consuming data pre-processing before it outputs user position. This paper proposes Cluster-based RF Fingerprinting (CRFF) to overcome these limitations by using modified Minimization of Drive Tests data which can be autonomously collected by cellular operators from their subscribers. The effect of environmental…

Pattern Classification from Multi-beam Acoustic Data Acquired in Kongsfjorden

2021

Climate change is causing a structural change in Arctic ecosystems, decreasing the effectiveness that the polar regions have in cooling water masses, with inevitable repercussions on the climate and with an impact on marine biodiversity. The Svalbard islands under study are an area greatly influenced by Atlantic waters. This area is undergoing changes that are modifying the composition and distribution of the species present. The aim of this work is to provide a method for the classification of acoustic patterns acquired in the Kongsfjorden, Svalbard, Arctic Circle using multibeam technology. Therefore the general objective is the implementation of a methodology useful for identifying the a…

Using anatomic and metabolic imaging in stereotactic radio neuro-surgery treatments

2016

Wykorzystanie środków unijnych w obszarze edukacji w województwie opolskim w latach 2004 - 2015. Wybrane problemy

2017

Korzystanie przez Polskę ze środków unijnych bywa kontestowane. Wydaje się konieczna i rzetelna ocena w różnych obszarach naszego życia społecznego, zwłaszcza w edukacji, zakresu i sposobu ich wykorzystania. Środki unijne w dużym stopniu wsparły różne działania. Jednak od nas samych zależy na co je wykorzystamy i jak je spożytkujemy. Badania przeprowadzone na terenie województwa opolskiego i gmin z województw sąsiednich pozwalają na stwierdzenie, że środki te przyczyniły się do aktywizacji nauczycieli, dyrekcji szkół, gmin, placówek edukacyjnych w pozyskiwaniu środków na działania podnoszące poziom wiedzy i umiejętności uczniów. Z przeprowadzonych badań wynika, że środki pozyskane za sprawą…

Komentarz do art. 26 -29, 35, 37 i 40 ustawy z dnia 24 maja 2013 r. o środkach przymusu bezpośredniego i broni palnej - uprawnienia funkcjonariuszy S…

2017

W niniejszym artykule podjęto problematykę uprawnień Służby Więziennej w zakresie stosowania środków przymusu bezpośredniego i broni palnej w oparciu o przepisy ustawy z 2013 r., która ujednoliciła zasady dotyczące wszystkich uprawnionych organów. Autor dokonał komentarza do przepisów tej ustawy analizując kolejno zagadnienia związane z umieszczeniem skazanego w celi zabezpieczającej, umieszczenia nieletniego w celi izolacyjnej, umieszczenia w pokoju izolacyjnym cudzoziemca przebywającego w strzeżonym ośrodku a także kwestie dotyczące postępowania w razie zranienia osoby w związku ze stosowanymi środkami przymusu bezpośredniego i bronią palną.

Automated prostate gland segmentation based on an unsupervised fuzzy C-means clustering technique using multispectral T1w and T2w MR imaging

2017

Prostate imaging analysis is difficult in diagnosis, therapy, and staging of prostate cancer. In clinical practice, Magnetic Resonance Imaging (MRI) is increasingly used thanks to its morphologic and functional capabilities. However, manual detection and delineation of prostate gland on multispectral MRI data is currently a time-expensive and operator-dependent procedure. Efficient computer-assisted segmentation approaches are not yet able to address these issues, but rather have the potential to do so. In this paper, a novel automatic prostate MR image segmentation method based on the Fuzzy C-Means (FCM) clustering algorithm, which enables multispectral T1-weighted (T1w) and T2-weighted (T…