Search results for "cop"
showing 10 items of 25502 documents
Electronic Energy Meter Based on a Tunnel Magnetoresistive Effect (TMR) Current Sensor
2017
In the present work, the design and microfabrication of a tunneling magnetoresistance (TMR) electrical current sensor is presented. After its physical and electrical characterization, a wattmeter is developed to determine the active power delivered to a load from the AC 50/60 Hz mains line. Experimental results are shown up to 1000 W of power load. A relative uncertainty of less than 1.5% with resistive load and less than 1% with capacitive load was obtained. The described application is an example of how TMR sensing technology can play a relevant role in the management and control of electrical energy.
Patterning of supported gold monolayers via chemical lift-off lithography
2017
The supported monolayer of Au that accompanies alkanethiolate molecules removed by polymer stamps during chemical lift-off lithography is a scarcely studied hybrid material. We show that these Au–alkanethiolate layers on poly(dimethylsiloxane) (PDMS) are transparent, functional, hybrid interfaces that can be patterned over nanometer, micrometer, and millimeter length scales. Unlike other ultrathin Au films and nanoparticles, lifted-off Au–alkanethiolate thin films lack a measurable optical signature. We therefore devised fabrication, characterization, and simulation strategies by which to interrogate the nanoscale structure, chemical functionality, stoichiometry, and spectral signature of t…
Técnicas de Evaluación en educación primaria y secundaria
2022
La evaluación en el aula es una acción imprescindible en el sistema educativo y por ende en la enseñanza. El gran desafío que se plantea en nuestro sistema educativo es la evaluación del alumnado en el aula, cómo mejorar la evaluación del alumnado dentro del sistema educativo. Esta simple pero tan profunda cuestión, cómo mejorar la evaluación, implica un esfuerzo de toda la comunidad educativa. Realizar una investigación respecto a la evaluación implica enfrentarse a un gran titán, ya que el estudio de la evaluación es un gran reto de la sociedad actual. Al hablar del modo en que se realiza la evaluación en el aula, se involucra a multitud de agentes: profesorado, alumnado, familia, sistema…
Zinātnisko rakstu un to autoru citējamības tendenču izvērtēšana un salīdzināšana
2021
Mūsdienās zinātniekiem ir grūti izvērtēt pētījumu virzienu tendences, jo esošie publikāciju meklēšanas risinājumi nesniedz pietiekami smalkas datu savākšanas un analīzes iespējas. Bakalaura darbā tiks veidots risinājums automatizētai tīmekļa pārmeklēšanai, datu tīrīšanai un analīzei. Šis risinājums sniegs plašāku ieskatu nodefinētās zinātnes jomās, un sniegs iespēju novērtēt visperspektīvākos pētījumu virzienus.
La Corte eur. dir. uomo e la non discriminazione tra coppie etero e omoaffettive
2018
Il saggio analizza le ricadute sul dibattito in tema di diritti fondamentali della recente decisione della Corte di Strasburgo su un singolare caso di discriminazione in base all’orientamento sessuale per così dire "alla rovescia" , in quanto dovuta all’inaccessibilità alla coppie eterosessuali austriache all’istituto della Partnership registrata, riservato alle coppie same-sex. Esaminata la giurisprudenza della Corte europea dei diritti dell'uomo in tema di non discriminazione in base all'orientamento sessuale e la soluzione adottata nel caso in questione con l'attestarsi della maggioranza dei giudici sulla dottrina del “separate but equal”, l'indagine si volge poi a considerare le spinte …
Using Heart Rate Variability Methods for Health-Related Outcomes in Outdoor Contexts : A Scoping Review of Empirical Studies
2023
Heart rate variability (HRV) is a psychophysiological variable that is often used in applied analysis techniques to indicate health status because it provides a window into the intrinsic regulation of the autonomic nervous system. However, HRV data analysis methods are varied and complex, which has led to different approaches to data collection, analysis, and interpretation of results. Our scoping review aimed to explore the diverse use of HRV methods in studies designed to assess health outcomes in outdoor free-living contexts. Four database indexes were searched, which resulted in the identification of 17,505 candidate studies. There were 34 studies and eight systematic reviews that met t…
Prompt Determination of the Mechanical Properties of Industrial Polypropylene Sandwich Pipes
2021
A simple and prompt method to determine the mechanical properties of industrial multilayer extrusion polypropylene pipes for a gravity sewer network is suggested. The engineering formulas included for calculating the permissible thickness and relative position of a foam core in the pipes are based on a linear-elastic approximation and the rule of mixtures. The applicability of the approximation was justified experimentally during investigation of the effective tensile characteristics of single- and multilayer pipes and each layer specimen by using traditional tests and finite-element calculations. The results obtained were used to formulate engineering recommendations for calculations of th…
Ultra-High Energy Neutrinos at the Pierre Auger Observatory
2013
The observation of ultrahigh energy neutrinos (UHE nu s) has become a priority in experimental astroparticle physics. UHE nu s can be detected with a variety of techniques. In particular, neutrinos can interact in the atmosphere (downward-going nu) or in the Earth crust (Earth-skimming nu), producing air showers that can be observed with arrays of detectors at the ground. With the surface detector array of the Pierre Auger Observatory we can detect these types of cascades. The distinguishing signature for neutrino events is the presence of very inclined showers produced close to the ground (i.e., after having traversed a large amount of atmosphere). In this work we review the procedure and …
Observation of the Early Structural Changes Leading to the Formation of Protein Superstructures.
2014
Formation of superstructures in protein aggregation processes has been indicated as a general pathway for several proteins, possibly playing a role in human pathologies. There is a severe lack of knowledge on the origin of such species in terms of both mechanisms of formation and structural features. We use equine lysozyme as a model protein, and by combining spectroscopic techniques and microscopy with X-ray fiber diffraction and ab initio modeling of Small Angle X-ray Scattering data, we isolate the partially unfolded state from which one of these superstructures (i.e., particulate) originates. We reveal the low-resolution structure of the unfolded state and its mechanism of formation, hi…
Influence of uniaxial pressure on dielectric properties of (1- x )Na 0.5 Bi 0.5 TiO 3– x SrTiO 3 for x = 0.01, 0.04, and 0.1 ceramics
2017
The publication costs of this article were covered by the Estonian Academy of Sciences and the University of Tartu.