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Interference in vehicle-to-vehicle communication networks - analysis, modeling, simulation and assessment

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ISBN: 9783866445710 Year: Pages: XX, 149 p. DOI: 10.5445/KSP/1000019872 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Computer Science
Added to DOAB on : 2019-07-30 20:01:57
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In wireless vehicular communication networks the periodic transmission of status updates by all vehicles represents a basic service primitive, in particular for safety related applications. Due to the limited communication resources the question raises how much data each node may provide such that the quality of service required by applications can still be guaranteed under realistic interference conditions. Local broadcasts capacity is introduced and analyzed to tackle this open question.

Dynamic Capacity Control in Air Cargo Revenue Management

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ISBN: 9783731500032 Year: Pages: VI, 225 p. DOI: 10.5445/KSP/1000034020 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Business and Management
Added to DOAB on : 2019-07-30 20:01:58
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This book studies air cargo capacity control problems. The focus is on analyzing decision models with intuitive optimal decisions as well as on developing efficient heuristics and bounds. Three different models are studied: First, a model for steering the availability of cargo space on single legs. Second, a model that simultaneously optimizes the availability of both seats and cargo capacity. Third, a decision model that controls the availability of cargo capacity on a network of flights.

Über den Zusammenhang von Tragfähigkeitsmessergebnissen mit mechanischen Modellgrößen bei Asphaltstraßen

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Book Series: Veröffentlichungen des Institutes für Straßen- und Eisenbahnwesen ISSN: 0344970X ISBN: 9783731502692 Year: Volume: 60 Pages: XV, 175 p. DOI: 10.5445/KSP/1000043258 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:01:58
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This work examines the mechanical deformation of flexible pavement under vertical load. Mechanical approaches for the computation of the radius of curvature R0 at the centre of the loaded area from HWD data were developed. Material parameter have been backcalculated in an iterative way using rheological models After that the radius of curvature has been subsequently calculated based on mechanical systems.

Analysis and design of multiple element antennas for urban communication

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Book Series: Karlsruher Forschungsberichte aus dem Institut für Hochfrequenztechnik und Elektronik ISSN: 18684696 ISBN: 9783866445130 Year: Volume: 59 Pages: XI, 140 p. DOI: 10.5445/KSP/1000017825 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:01
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This work focuses on the analysis and design of multiple element antennas (MEA) and their interaction with the propagation channel. In particular, attention is given to urban channels and how its information throughput, i.e. capacity, can be improved. With this in mind, this work extends an existing network model of the communication system in order to reduce computation time, investigates the communicational limits of MEA systems and proposes a synthesis method for capacity maximization.

Rethinking Capitalist Development

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Book Series: Routledge Frontiers of Political Economy ISBN: 9780203645901 9780415159593 9780415651486 9781134722723 9781134722716 9781134722679 Year: DOI: 10.4324/9780203645901 Language: English
Publisher: Taylor & Francis
Subject: Business and Management --- Economics
Added to DOAB on : 2019-11-08 11:21:13
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This collection honours the work of the eminent economist Josef Steindl. Steindl's work is illuminated through a critical appraisal of its central constructs with a focus on its relevance to current economic conditions. This collection charts the thinking of one of the leading economic theorists of the twentieth century.

International Aid and China's Environment

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Book Series: Routledge Studies on China in Transition ISBN: 9780203086520 9780415378208 9780415648684 9781134183166 9781134183159 9781134183111 Year: DOI: 10.4324/9780203086520 Language: English
Publisher: Taylor & Francis
Subject: Environmental Sciences --- Political Science --- Sociology --- Science (General)
Added to DOAB on : 2019-11-08 11:21:21
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Rapid economic growth in the world's most populous nation is leading to widespread soil erosion, desertification, deforestation and the depletion of vital natural resources. The scale and severity of environmental problems in China now threaten the economic and social foundations of its modernization. Using case studies, Morton analyzes the relationship between international and local responses to environmental problems in China, challenging the prevailing wisdom that weak compliance is the only constraint upon local environmental management in China. It advances two interrelated discussions: first, it constructs a conceptual framework for understanding the key dimensions of environmental capacity. This is broadly defined to encompass the financial, institutional, technological and social aspects of environmental management. Second, the book presents the results of an empirical inquiry into the implementation of donor-funded environmental projects in both China's poorer and relatively developed regions. By drawing upon extensive fieldwork, it seeks to explain how, and under what conditions, international donors can strengthen China's environmental capacity, especially at the local level. It will be of interest to those studying Chinese politics, environmental studies and international relations.

Modeling Individual Differences in Perceptual Decision Making

Authors: --- ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889450565 Year: Pages: 140 DOI: 10.3389/978-2-88945-056-5 Language: English
Publisher: Frontiers Media SA
Subject: Psychology --- Science (General)
Added to DOAB on : 2017-07-06 13:27:36
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To deal with the abundant amount of information in the environment in order to achieve our goals, human beings adopt a strategy to accumulate some information and filter out other information to ultimately make decisions. Since the development of cognitive science in the 1960s, researchers have been interested in understanding how human beings process and accumulate information for decision-making. Researchers have conducted extensive behavioral studies and applied a wide range of modeling tools to study human behavior in simple-detection tasks and two-choice decision tasks (e.g., discrimination, classification). In general, researchers often assume that the manner in which information is processed for decision-making is invariant across individuals given a particular experimental context. Independent variables, including speed-accuracy instructions, stimulus properties (i.e., intensity), and characteristics of the participants (i.e., aging, cognitive ability) are assumed to affect the parameters in a model (i.e., speed of information accumulation, response bias) but not the way that participants process information (e.g., the order of information processing). Given these assumptions, much modeling has been accomplished based on the grouped data, rather than the individual data. However, a growing number of studies have demonstrated that there were individual differences in the perceptual decision process. In the same task context, different groups of the participants may process information in different manners. The capacity and architecture of the decision mechanism were found to vary across individuals, implying that humans’ decision strategies can vary depending on the context to maximize their performance. In this special issue, we focused on a particular subset of cognitive models, particularly accumulator models, multinomial processing trees and systems factorial technology (SFT) as applied to perceptual decision making. The motivation for the focus on perceptual decision-making is threefold. Empirical studies of perception have grown out of a history of making a large number of observations for each individual so as to achieve precise estimates of each individual’s performance. This type of data, rather than a small number of observations per individual, is most amenable to achieving precision in individual-level and group-level cognitive modeling. Second, the interaction between the acquisition of perceptual information and the decisions based on that information (to the extent that those processes are distinguishable) offers rich data for scientific exploration. Finally, there is an increasing interest in the practical application of individual variation in perceptual ability, whether to inform perceptual training and expertise, or to guide personnel decisions. Although these practical applications are beyond the scope of this issue, we hope that the research presented herein may serve as the foundation for future endeavors in that domain. To deal with the abundant amount of information in the environment in order to achieve our goals, human beings adopt a strategy to accumulate some information and filter out other information to ultimately make decisions. Since the development of cognitive science in the 1960s, researchers have been interested in understanding how human beings process and accumulate information for decision-making. Researchers have conducted extensive behavioral studies and applied a wide range of modeling tools to study human behavior in simple-detection tasks and two-choice decision tasks (e.g., discrimination, classification). In general, researchers often assume that the manner in which information is processed for decision-making is invariant across individuals given a particular experimental context. Independent variables, including speed-accuracy instructions, stimulus properties (i.e., intensity), and characteristics of the participants (i.e., aging, cognitive ability) are assumed to affect the parameters in a model (i.e., speed of information accumulation, response bias) but not the way that participants process information (e.g., the order of information processing). Given these assumptions, much modeling has been accomplished based on the grouped data, rather than the individual data. However, a growing number of studies have demonstrated that there were individual differences in the perceptual decision process. In the same task context, different groups of the participants may process information in different manners. The capacity and architecture of the decision mechanism were found to vary across individuals, implying that humans’ decision strategies can vary depending on the context to maximize their performance. In this special issue, we focused on a particular subset of cognitive models, particularly accumulator models, multinomial processing trees and systems factorial technology (SFT) as applied to perceptual decision making. The motivation for the focus on perceptual decision-making is threefold. Empirical studies of perception have grown out of a history of making a large number of observations for each individual so as to achieve precise estimates of each individual’s performance. This type of data, rather than a small number of observations per individual, is most amenable to achieving precision in individual-level and group-level cognitive modeling. Second, the interaction between the acquisition of perceptual information and the decisions based on that information (to the extent that those processes are distinguishable) offers rich data for scientific exploration. Finally, there is an increasing interest in the practical application of individual variation in perceptual ability, whether to inform perceptual training and expertise, or to guide personnel decisions. Although these practical applications are beyond the scope of this issue, we hope that the research presented herein may serve as the foundation for future endeavors in that domain.

The Cognitive Neuroscience of Visual Working Memory

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889451685 Year: Pages: 182 DOI: 10.3389/978-2-88945-168-5 Language: English
Publisher: Frontiers Media SA
Subject: Neurology --- Science (General)
Added to DOAB on : 2017-08-28 14:01:09
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Visual working memory allows us to temporarily maintain and manipulate visual information in order to solve a task. The study of the brain mechanisms underlying this function began more than half a century ago, with Scoville and Milner’s (1957) seminal discoveries with amnesic patients. This timely collection of papers brings together diverse perspectives on the cognitive neuroscience of visual working memory from multiple fields that have traditionally been fairly disjointed: human neuroimaging, electrophysiological, behavioural and animal lesion studies, investigating both the developing and the adult brain.

100 Years of Prandtl's Wedge

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ISBN: 9781614998495 9781614998501 Year: Pages: 144 DOI: 10.3233/978-1-61499-850-1-i Language: English
Publisher: IOS Press
Subject: General and Civil Engineering
Added to DOAB on : 2018-06-20 15:09:53
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The biggest problem for a shallow foundation, just as for any other type of foundation, is a failure due to an overestimation of the bearing capacity. This means that the correct prediction of the bearing capacity of the foundation is often the most important part of the design of a civil structure. That is why the publication by Prandtl in 1920 about the hardness of a plastic body, was a major step in solving the bearing capacity of shallow foundations, although it is well possible that he never realised this, because his solution was not made for civil engineering purposes, but for mechanical purposes. Over the last 100 years, a lot of extensions have been made, for example with inclination factors and shape factors. Also many laboratory experiments have been done and numerical calculations have been made. Some even try to extrapolate the failure mechanism for shallow foundations to the failure mechanism around the tip of a pile. All this scientific work leads back to the first publication by Ludwig Prandtl in 1920.This book, “100 Years of Prandtl’s Wedge”, is intended for all those who are interested in these fundamentals of foundation engineering and their history. The Appendices include a copy of Prandtl’s Über die Härte plastischer Körper and of Reissner’s publication of 1924, Zum Erddruckproblem.

Einfluss von Instationarität auf die Wartezeit an Knotenpunkten mit und ohne Lichtsignalanlage

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Book Series: Schriftenreihe des Instituts für Verkehrswesen, Karlsruher Institut für Technologie ISSN: 03415503 ISBN: 9783731506751 Year: Volume: 72 Pages: IX, 155 p. DOI: 10.5445/KSP/1000069797 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:02:00
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Vehicle delay is used to assess the level of service for intersections. The impact of non-stationary arrival flow rates has only partly been included in calculation methods. Empirical data is used to show that traffic volume during the peak hour can be distributed in very different forms. A microscopic traffic simulation study is carried out in order to assess their impact on the delay. As a result a new factor is proposed to include non-stationarity more precisely in the calculation of delay.

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