Search results for "Issues"
showing 10 items of 669 documents
On the improved Estimation of the Compliance-Parameters of the Physiologically Closed Cardiovascular System
1987
The influence of the type of the sampling-schedule and of the system-excitation with respect to identifiability and estimation-accuracy of the compliance-parameters of a nonlinear model of the physiologically closed cardiovascular system will be investigated. Using the sensitivity-functions of the arterial systemic pressure with respect to the compliance-parameters it will be shown how to select the sample-schedule and system-excitation in order to get optimal estimation-accuracy.
Shooting methods for 1D steady-state free boundary problems
1993
AbstractIn this note, we present two numerical methods based on shooting methods to solve steady-state diffusion-absorption models.
Dades massives i estadística: La perspectiva d'un estadístic
2014
Les dades massives (big data) representen un recurs sense precedents per a afrontar reptes científics, econòmics i socials, però també incrementen la possibilitat de traure conclusions enganyoses. Per exemple, l’ús d’enfocaments basats exclusivament en dades i que es despreocupen de comprendre el fenomen en estudi, que s’orienten a un objectiu esmunyedís i canviant, que no tenen en compte problemes determinants en la recopilació de dades, que resumeixen o «cuinen» inadequadament les dades i que confonen el soroll amb el senyal. Repassarem alguns casos reeixits i il·lustrarem com poden ajudar els principis de l’estadística a obtenir una informació més fiable de les dades. També abordarem els…
Improving light propagation Monte Carlo simulations with accurate 3D modeling of skin tissue
2008
In this paper, we present a 3D light propagation model to simulate multispectral reflectance images of large skin surface areas. In particular, we aim to simulate more accurately the effects of various physiological properties of the skin in the case of subcutaneous vein imaging compared to existing models. Our method combines a Monte Carlo light propagation model, a realistic three-dimensional model of the skin using parametric surfaces and a vision system for data acquisition. We describe our model in detail, present results from the Monte Carlo modeling and compare our results with those obtained with a well established Monte Carlo model and with real skin reflectance images.
Quantification and automatized adaptive detection of in vivo and in vitro neuronal bursts based on signal complexity.
2015
In this paper, we propose employing entropy values to quantify action potential bursts in electrophysiological measurements from the brain and neuronal cultures. Conventionally in the electrophysiological signal analysis, bursts are quantified by means of conventional measures such as their durations, and number of spikes in bursts. Here our main aim is to device metrics for burst quantification to provide for enhanced burst characterization. Entropy is a widely employed measure to quantify regularity/complexity of time series. Specifically, we investigate the applicability and differences of spectral entropy and sample entropy in the quantification of bursts in in vivo rat hippocampal meas…
Information Technology Issues in Finland
2020
Information technology (IT) industry is essential in Finland because of its significant export contribution, extensive workforce, and research and innovation contributions. This chapter highlights key issues in this important industry. For instance, IT reliability and efficiency are the top issues necessary for the Finnish IT industry’s competitiveness in a global context. Furthermore, business intelligence and analytics tools, techniques and skills are central to the Finnish IT industry. The industry has a very experienced workforce that is however aging and thus there is a need for training of young personnel to join the industry. Generally, the Finnish IT workers are satisfied with their…
Ethics, Computer Simulation, and the Future of Humanity
2019
This chapter explores some of the key ethical issues impacting the field of computer modeling and simulation (MS this framework is not a set of ethical guidelines, but a toolkit for guiding ethical decision-making in this interdisciplinary endeavor. In the fourth section, we ask: even if we can model the origin and destiny of humanity, does that mean we should? Finally, in the conclusion we issue an ethical challenge to M&S professionals.
Editorial message
2006
Geometric Computing and Reasoning (GCR) is a new track of SAC and it is dedicated to the recent trends in the domain of geometric constraint solving and automated, or computer aided, deduction in geometry.
Delving Into the Body Fears’. Teacher Training in Art Education Attending to the Work of Women Artists
2018
Planteamos el uso del arte contemporáneo en la formación de docentes. Consideramos de gran interés acercar los actuales dispositivos del arte a las futuras generaciones de maestros y maestras, ya que en el mundo del arte se están tratando temáticas sociales y culturales que van a resultar decisivas en la labor que deberán llevar a cabo quienes eduquen. Desde una perspectiva regeneradora y vitalista, proponemos una posibilidad de estrategias en la formación artística del colectivo docente. Integramos temáticas que habitualmente no se tratan en el ámbito escolar, pero que están vinculadas a las emociones, a las necesidades y a la vida cotidiana del alumnado. Conceptos como «el miedo» o «el cu…
A Phenomenographic Research Study of Students’ Conceptions of Mobile Learning: An Example From Higher Education
2019
This article aims to identify different ways of using mobile devices in students’ learning in higher education. This qualitative research presents the findings from a phenomenographic research of students’ conceptions of mobile learning (m-learning) in higher education. A cohort of 16 students from four universities of Bangladesh took part in semi-structured interviews to explore their in-depth understandings and experiences of m-learning. The findings indicate that university students perceived five qualitatively different ways of using mobile devices in their learning: a medium for communication; a medium for management of learning materials; a tool for effective learning; a means for co…