Search results for "solu"

Burst analysis tool for developing neuronal networks exhibiting highly varying action potential dynamics

2012

In this paper we propose a firing statistics based neuronal network burst detection algorithm for neuronal networks exhibiting highly variable action potential dynamics. Electrical activity of neuronal networks is generally analyzed by the occurrences of spikes and bursts both in time and space. Commonly accepted analysis tools employ burst detection algorithms based on predefined criteria. However, maturing neuronal networks, such as those originating from human embryonic stem cells (hESCs), exhibit highly variable network structure and time-varying dynamics. To explore the developing burst/spike activities of such networks, we propose a burst detection algorithm which utilizes the firing …

Measurement of pyrophosphate concentration in cells by simple terpyridine-Zn(II) probe

2015

Pyrophosphate (PPi) anion is an integral part of our physiology. It partakes in the crucial energy transactions in cells and proffers energy for the harmonious functioning of the cell machinery. Discrepancies in PPi concentrations have been associated with several pathological aberrations such as chronic pyrophosphate arthropathy, calcium pyrophosphate deposition disease, cancer etc. However, there still exists a strong demand for an efficient and specific cell based assay for PPi in order to tap its importance to full potential. Terpyridine-Zn2+ complex (ZnCl2L probe) binds with PPi in 1:3 stoichiometry. This association engenders an emission band (λem) at ~591 nm when excited at 440 nm wi…

Automated Checking of Flexible Mathematical Reasoning in the Case of Systems of (In)Equations and the Absolute Value Operator

2021

We present an approach and a tool for automatically providing feedback on solutions that involve complicated reasoning patterns. Currently the tool supports linear systems of equations and inequations that may also contain the absolute value operator and a restricted form of rational functions. This suffices for designing problems that are laborious to solve with standard mechanical procedures, but much easier using short-cuts that students may find by creative thinking. Earlier research has found that struggling with important mathematics promotes conceptual development. Our goal is to encourage students to such struggling. A crucial feature is to give them great freedom to choose the path…

Water Dynamics in Biological Systems investigated using Neutron Scattering Techniques

Living systems can not survive in absence of the water environments which play a fundamental role in living functions. Thus in the scienti?c community many studies were and are addressed to characterize water and its dynamics properties in biological systems. However, a clear description of water in such systems has been not reached yet. In fact, the investigations performed with di?erent techniques - those based on Nuclear Magnetic Resonance or those based on Neutron Scattering - look at di?erent di?usive motions and interactions water-biomolecules, leading controversial results and hence generating many debates between scientists. In this thesis we support the idea that two water populati…

Problem solving e metacognizione. L’uso didattico del prompt per sviluppare strategie di problem solving nei futuri maestri

2015

Si presentano i risultati di una ricerca che ha coinvolto in totale 235 studenti del corso di Laurea in Scienze della Formazione Primaria dell’Università di Palermo. Con la ricerca si è inteso individuare le metodologie di sostegno atte a promuovere nei futuri maestri da una parte la capacità di identificare e affrontare situazioni scolastiche problematiche in modo adeguato; dall’altra la capacità di riflettere metacognitivamente sul processo di risoluzione del problema. La ricerca costituisce un esempio di come si possa sviluppare nei futuri insegnanti in formazione quell’insieme di abilità cognitive e metacognitive che confluiscono nella capacità di identificare e risolvere situazioni edu…

PRIME RIFLESSIONI SULLA NUOVA CONCILIAZIONE PROPOSTA DALLA CORTE DI GIUSTIZIA TRIBUTARIA

2022

Il contributo analizza l'istituto della nuova conciliazione proposta dalla corte di giustizia tributaria, previsto dall’art. 4, comma 1, lett. g), della legge n. 130 del 2022, che inserisce – nel corpo del novellato d.lgs. n. 546 del 1992 - l’art. 48-bis.1, soffermandosi in particolare sul significato dell'espressione questioni di facile e pronta soluzione.

Errores conceptuales en el estudio del equilibrio químico : nuevas aportaciones relacionadas con la incorrecta aplicación del principio de Le Chateli…

2021

Resumen basado en el de la publicación Resumen en inglés La utilidad limitada del principio de Le Chatelier y su formulación vaga y ambigua pueden ser algunas de las fuentes de conceptos erróneos en el equilibrio químico. Para diagnosticar conceptos erróneos, se administró una prueba escrita a 170 estudiantes universitarios de primer año. Las respuestas revelaron que los errores surgieron en términos generales: a) la mala aplicación y la incomprensión del Principio de Le Chatelier; b) utilización de recordatorios de memorización y procedimientos algorítmicos; c) control incorrecto de las variables involucradas y uso limitado de la ley de equilibrio químico; d) falta de dominio de los princi…

Incidence de la clarification des moûts de raisin sur les fermentescibilltés alcoolique et malolactique

1993

<p style="text-align: justify;">Des essais de débourbage en vinification en blanc, réalisés de 1988 à 1992, mettent en évidence le rôle important joué par la teneur en macromolécules solubles dans le moût de raisin. Les moûts de faible turbidité conduisent en effet à des fermentations alcooliques lentes en relation avec de faibles populations levuriennes. Il est également confirmé que la libération de polysaccharides exocellulaires par les levures au cours de la fermentation alcoolique est d'autant plus élevée que le moût de départ a été fortement appauvri en colloïdes de raisin. Par contre, ce sont dans les lots les plus clarifiés que l'on observe la meilleure fermentescibilité malol…

A GEM-TPC in twin configuration for the Super-FRS tracking of heavy ions at FAIR

2018

The GEM-TPC [1] described herein will be part of the standard beam-diagnostics equipment of the Super-FRS [2] . This chamber will provide tracking information for particle identification at rates up to 1 MHz on an event-by-event basis. The key requirements of operation for these chambers are: close to 100% tracking efficiency under conditions of high counting rate, spatial resolution below 1 mm and a superb large dynamic range covering projectiles from Z=1 up to Z=92. The current prototype consists of two GEM-TPCs inside a single vessel, which are operating independently and have electrical drift fields in opposite directions. The twin configuration is done by flipping one of the GEM-TPCs o…

DEM-resolution control on rainfall-triggered landslide modeling within a triangulated network-based model

2019

Catchment slope distribution significantly controls rainfall-triggered landslide modeling, in both direct and indirect ways. Slope directly determines the soil volume associated with instability. Indirectly, it affects the subsurface lateral redistribution of soil moisture across the basin, which in turn determines the water pore pressure conditions that impact slope stability. It is thus clear that the accuracy in reproducing slope distribution may be crucial in slope stability analysis. The resolution of the Digital Elevation Model (DEM) regulates the description of the topography. The correlation between raster resolution and landslide model outputs has been investigated in the literatur…