Search results for "ERROR"

ZigBee networks performance under WLAN 802.11b/g interference

2009

ZigBee is a standard protocol suite for low rate wireless personal area networks (LR-WPANs) and has been widely utilized in various fields. Since both ZigBee and WLAN (802.11b/g) operate in the 2.4GHz unlicensed industrial scientific medical (ISM) frequency band, mutual interference is likely to exist and cause signal degradation. In this paper, an interference analysis model is suggested to obtain an estimate of Packet Error Rate (PER) of a ZigBee network. A ZigBee evaluation kit, AVR RZ200, was implemented for measurement of Packet Loss Ratio (PLR). The measured PLR matches the estimated PER, with varied distances and different center frequency offsets of different channels.

Perceptually weighted optical flow for motion-based segmentation in MPEG-4 paradigm

2000

In the MPEG-4 paradigm, the sequence must be described in terms of meaningful objects. This meaningful, high-level representation should emerge from low-level primitives such as optical flow and prediction error which are the basic elements of previous-generation video coders. The accuracy of the high-level models strongly depends on the robustness of the primitives used. It is shown how perceptual weighting in optical flow computation gives rise to better motion estimates which consistently improve motion-based segmentation compared to equivalent unweighted motion estimates.

The effect of social geographic factors on the untreated tooth decay among head start children

2017

Background: Disparities among untreated dental caries exist for children from low-income families in the United States. Understanding of the mechanism of the disparities is required to reduce it and social geographic factors are one of the important influences. Although the effect of fluoridated water has been well reported, studies of other sociogeograpic factors, such as the density of available dentists, are still very limited. The objective of this study is to explore the effect of sociogeographic factors on the number of primary teeth with untreated dental caries among children from low-income families who are enrolled in Head Start programs throughout Northeast Ohio of the United Stat…

Communication Challenges in CBRN Terrorism Crises: Expert Perceptions

2014

This paper is a follow-up of ‘Terrorism Communication: Characteristics and Emerging Perspectives in the Scientific Literature 2002–2011’, published in JCCM in September 2013, Volume 21, Issue 3.

The Undesired Other

2019

Over the recent years, the theme of abortion has set in the agenda of many countries. Although the abortion law was already present in France, the US and the UK, in some other countries the law was recently sanctioned just after the 2000s. This chapter deals with the problem of hospitality in the days of terrorism. From different angles, this chapter explores the question of abortion and the ideas of hospitality and multiculturalism, points that modern terrorism has instilled as necessary debates. We hold the thesis that the modern self has serious problems to understand the alterity when it confronts the own desires. The right of legal abortion should be framed as a decline of hospitality,…

Field testing of repurposed electric vehicle batteries for price-driven grid balancing

2019

Abstract As electric cars become more widespread, the disposal and recycling of used batteries will become an important challenge. Typically, vehicle batteries are replaced if their capacity drops to 70–80% of initial capacity. However, they may still be useful for stationary applications. In this paper, results from a field test of a molten salt high-temperature electric vehicle battery repurposed as stationary storage for grid balancing are presented. In a previous study, we have shown that a mixed integer linear programming control strategy driven by a spot-market price for electricity is best suited for an implementation on hardware with limited computational resources. A 14-day experim…

Dual-Diameter Laterals in Center-Pivot Irrigation System

2022

Design strategies to enhance modern irrigation practices, reduce energy consumption, and improve water use efficiency and crop yields are fundamental for sustainability. Concerning Center-Pivot Irrigation Systems, different design procedures aimed at optimizing water use efficiency have been proposed. Recently, following a gradually decreasing sprinkler spacing along the pivot lateral with constant diameter and sprinkler flow rate, a new design method providing a uniform water application rate has been introduced. However, no suggestions were given to design multiple-diameter laterals characterized by different values of the inside pipe diameter. In this paper, first the previous design pro…

Die Bestimmung der Molekulargewichtsverteilung von nichtkristallisierenden Polymeren mit dem Elektronenmikroskop, 6. Fehlerkorrektur der experimentel…

1977

A mathematical treatment is described, by means of which the effect of the measuring errors on the number molecular weight distribution of polymers, as obtained with an electron microscope (EM), can be eliminated. It is shown, that the difference in the nonuniformities of the measured and the corrected distribution would be negligible only in the case of samples with high average degrees of polymerization and sufficiently broad distributions. Otherwise differences of 10% or more can be found, depending on the size of the actual measuring error. This is shown by means of four practical examples. For a practical application the measuring error may not exceed some critical value, which, though…

Artifacts in Light Scattering Experiments Using Opaque Scattering Screens on the Example of Spinodal Decomposition

1996

Kollokationsfehler als zentrales Übersetzungsproblem bei angehenden Übersetzern

2017

In the opinion of many translation scholars, when evaluating the quality of the translation it is essential to distinguish between language errors and translation errors, wherein translational errors should have a decisive impact on the assessment of the translation. The article shows that the mentioned dichotomy has by no means a strict character, but rather there are smooth boundaries and differences in the perception of what translational errors are. And so the analysis of collocation errors in translations of trainee certified translators allows us to say, that contrary to the usual treatment for language errors due to the complex nature of the failures in terms of collocation, they oft…