نتایج جستجو برای: pavement physical characteristics

تعداد نتایج: 1278217  

2012
Kamran Muzaffar Khan Mumtaz Ahmed Kamal

Pavement rutting is one of the most common and destructive pavement distresses being observed in flexible pavements, which is primarily due to axle loads that exceed legal limit and high ambient temperatures, and also poor mix design is one of the cause of rutting. The drastic increase in traffic volume during last few decades has resulted in premature pavement failures of almost the whole road...

Journal: :Current Biology 2013
Olivier Hamant

A new study showing a functional and physical interaction between the ROP effector RIC1 and the microtubule severing enzyme katanin brings together auxin signaling and microtubule ordering in Arabidopsis pavement cells.

Assessment of pavement distresses is one of the important parts of pavement management systems to adopt the most effective road maintenance strategy. In the last decade, extensive studies have been done to develop automated systems for pavement distress processing based on machine vision techniques. One of the most important structural components of computer vision is the feature extraction met...

2007
Kuang-Yang Kou

The occurrence of a wet-pavement crash is actually a complex system, and to a large degree nonlinear, as the behavior of drivers and the interaction between roadway and vehicle characteristics tend to be nonlinear. As a result, prediction of wet-pavement crashes is difficult to model mathematically. Fuzzy logic models, however, can model nonlinear functions of enormous complexity, and can be bu...

2012
Guoqing Zhou

A pavement management system (PMS) is a valuable tool and one of the critical elements of the highway transportation infrastructure. Since a vast amount of pavement data is frequently and continuously being collected, updated, and exchanged due to rapidly deteriorating road conditions, increased traffic loads, and shrinking funds, resulting in the rapid accumulation of a large pavement database...

2004
Martin Herold Dar Roberts Omar Smadi

1. Introduction The quality standards for transportation infrastructure have evolved considerably over the last three decades. The data accuracy requirements to support road management have decreased from tens of meters to a few decimeters with annual update rates. Roads are prioritized for maintenance and treatment as a result of pavement inspections. The cost of frequent, comprehensive inspec...

2012
Bryan T. Adey

In this paper, the potential use of an exponential hidden Markov model to model a hidden pavement deterioration process, i.e. one that is not directly measurable, is investigated. It is assumed that the evolution of the physical condition, which is the hidden process, and the evolution of the values of pavement distress indicators, can be adequately described using discrete condition states and...

2016
D. Balzarini

Reduction in vehicle fuel consumption is one of the main benefits considered in technical and economic evaluations of road improvements considering its significance. Surface roughness, texture, and structural response are the main pavement characteristics influencing rolling resistance. This project investigates the increase in vehicle energy consumption caused by the structural response of a c...

2011
Ghada Moussa Khaled Hussain

Pavement condition evaluation is a significant part of a good pavement management system for effective maintenance, rehabilitation, and reconstruction decision-making. One of the key components of pavement condition evaluation is the quantification of pavement distresses data. Cracking is the main form of early pavement distresses. Cracking of pavement affects road condition, driving comfort, t...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2007
Goro Nishimoto Go Sasaki Eishin Yaoita Masaaki Nameta Huiping Li Kyoko Furuse Hidehiko Fujinaka Yutaka Yoshida Akihisa Mitsudome Tadashi Yamamoto

Hagfish (Eptatretus burgeri) are agnathous and are the earliest vertebrates still in existence. Pavement cells adjacent to the mitochondria-rich cells show orthogonal arrays of particles (OAPs) in the gill of hagfish, a known ultrastructural morphology of aquaporin (AQP) in mammalian freeze-replica studies, suggesting that an AQP homolog exists in pavement cells. We therefore cloned water chann...

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