Search results for "Artifact"
showing 10 items of 193 documents
A novel technique to follow fast PaO2 variations during experimental CPR
2003
An ultrafast responding fluorescent-quenching PO2 probe allows time-resolved, in vivo measurement of PO2. This study describes several validation experiments of this new device in vitro, and reports its first use during cardiopulmonary resuscitation in an animal model of cardiac arrest.The influence of CO2, temperature and motion artefacts on the signal response of the PO2 probe was analysed in vitro by systematic variation of these values. Thereafter, with approval of the Review Board for the care and use of animals, CPR was performed in four pigs. The PaO2 course was recorded continuously at time resolution of80 ms in the abdominal aorta using an uncoated fluorescence-quenching probe (Fox…
A fully automated method for accurate measurement of geometrical distortion in magnetic resonance imaging of a 3D-lattice phantom
2019
Abstract This paper describes an automated method for extracting the apparent positions of fiducial points from 2D or 3D images of a phantom. We consider a 3D-lattice phantom for two main reasons: first, ease of manufacture and isotropy of its structure with respect to coordinate projections; second, a connected structure allowing to uniquely assess the adjacency relationship between fiducial points even if geometric distortions arising from main magnet inhomogeneity and gradient fields non-linearity is severe as observed in open-bore systems. In order to validate our proposed method and compare different choices for the parameters of our phantom (i.e. number and distance between grids and …
Photoplethysmography In Dogs And Cats: Selection Of Measurement Sites For Pet Monitor
2018
The PPG measurements of the study Cugmas et al, 2018. Notes.txt include all information about the dataset.
Photoplethysmograhic sensors, potential and limitations: Is it time for regulation? A comprehensive review
2023
Healthcare is expected to increasingly shift care out of inpatient settings thanks to wearable monitoring systems. Photoplethysmography (PPG) is an optical technique already integrated into wrist-worn commercial products which presents significant advantages in terms of cost and dimensions. PPG-based devices, despite their ability to detect multiple cardiovascular parameters, are affected by several influencing conditions that depend both on technological or environmental variables, and on intra- and inter-subject variability that influences the whole measurement chain and reliability, hindering an objective characterization of PPG devices. Plus, the lack of standardization for data collect…
Fast multi-directional DSLM for confocal detection without striping artifacts
2020
In recent years light-sheet fluorescence microscopy (LSFM) has become a cornerstone technology for neuroscience, improving the quality and capabilities of 3D imaging. By selectively illuminating a single plane, it provides intrinsic optical sectioning and fast image recording, while minimizing out of focus fluorescence background, sample photo-damage and photo-bleaching. However, images acquired with LSFM are often affected by light absorption or scattering effects, leading to un-even illumination and striping artifacts. In this work we present an optical solution to this problem, via fast multi-directional illumination of the sample, based on an acousto-optical deflector (AOD). We demonstr…
A Sociocultural Approach to Children’s Visual Creations
2021
AbstractThis chapter locates the book within the research on children’s art. It explores interpretations of children’s visual creations throughout the twentieth century and situates the approach of the book within the research landscape. The authors take developmental psychological, educational, and aesthetic approaches to form a sociocultural view of children’s art, challenging many of the previous research assumptions. Through adopting the paradigm of the sociocultural approach, the authors embrace its view of children as competent cultural actors and active participants in cultural production. Thus, the discussion focuses on meaning-making: the authors analyze visual artifacts made by st…
Construction of decision support system in business design based on integration of information technology
2016
In an increasingly competitive environment the successful functioning of any business requires continuous improvement of services, expanding the range of products and range of services, standardization, and implementation of new busines ideas, establishment and dissemination of innovative solutions on the market. The implementation of such measures were carried out in a well-developed business projects. Automating business processes often requires the organization of various programs, which creates a problem of integration. The paper attempts to organizations handling business processes through the integration of various software tools. One of the major component due implementing business p…
The Role of Business Models in Developing Business Networks
2008
Business models have received a substantial amount of interest recently. Also, various research studies have discussed business models, especially in the context of a single company operating in mass markets. Unfortunately, these models often are not applicable for complex products or services that build on long-term knowledge about customer tastes, facilities, and skills. Especially on global markets, the asset specificity and vast geographical distances make it difficult for any single company to provide this kind of service cost-efficiently on a large scale. Instead, it calls for cooperation among multiple firms. Creation of a joint business model for a collaborative network is a necessa…
Collaborative Business Model Innovation Process for Networked Services
2013
This paper presents a process framework for innovating joint business models (co-BM) for multiple companies. Our framework describes the change management that should be carried out in parallel to the rigorous analysis and development of the business model details. With two illustrative cases we show that fruitful co-BM creation process in networks requires both development of the model itself, but also organizational innovation processes including mutual learning and harmonisation of operations. We claim that by understanding this dual process and its key facets might help (1) to coordinate the practical BM creation projects better and (2) to analyse which BM related decisions contribute o…
Supporting start-up business model design through system dynamics modelling
2017
Purpose The purpose of this paper is to explore how system dynamics (SD) modelling can provide a methodological support to business model (BM) design with the intent to better communicate business strategy and manage performance. Design/methodology/approach After a literature review of the field and an analysis of the strengths and limitations of conventional BM frameworks, the paper illustrates and discusses an approach that combines such a framework with SD modelling. A single-case study design was selected to explore the implications and limitations of using this combined approach to business modelling. Findings The methodological support provided by SD to BM design may effectively impr…