On-the-Road Durability and Performance of TWC Exhaust Emission Control Under Real Nordic Driving Conditions

1991 ◽  
Author(s):  
Juhani K. Laurikko
Keyword(s):  
Emission Control ◽  
Exhaust Emission ◽  
The Road ◽  
Driving Conditions ◽  
On The Road ◽  
And Performance

Mobile Learning Technologies

2011 ◽  
pp. 146-152 ◽  
Author(s):  
Diane M. Gayeski
Keyword(s):  
Health Care Professionals ◽  
High Speed ◽  
Learning Technologies ◽  
Social Environments ◽  
The Road ◽  
Powerful Learning ◽  
Large Numbers ◽  
On The Road ◽  
And Performance ◽  
Internet Connections

While educational and corporate training environments have made large investments in getting wired to high-speed Internet connections, our work and social environments are rapidly becoming more mobile and flexible. The Internet and organizationally based intranets are powerful learning and performance tools, as long as users have a high-speed connection and up-to-date computing equipment. Online learning and information is not nearly as convenient or reliable when learners need to access sites from their homes, hotel rooms, client locations, or while on the road. In corporate settings, large numbers of critical employees such as factory engineers, health care professionals, builders, and maintenance workers often do not even have offices in which to use a computer.

A First Investigation of Truck Drivers’ Preferences and Behaviors using a Prototype Cooperative Adaptive Cruise Control System

2018 ◽  
Vol 2672 (34) ◽  
pp. 39-48 ◽  
Author(s):  
Shiyan Yang ◽  
Steven E. Shladover ◽  
Xiao-Yun Lu ◽  
Hani Ramezani ◽  
Aravind Kailas ◽  
...  
Keyword(s):  
Adaptive Cruise Control ◽  
Aerodynamic Drag ◽  
Truck Drivers ◽  
Cruise Control ◽  
Fuel Savings ◽  
The Road ◽  
Cooperative Adaptive Cruise Control ◽  
And Behaviors ◽  
On The Road ◽  
And Performance

Cooperative adaptive cruise control (CACC) is a driver-assist technology that uses vehicle-to-vehicle wireless communication to realize faster braking responses in following vehicles and shorter headways compared with adaptive cruise control. This technology not only enhances road safety, but also offers fuel savings benefits as a result of reduced aerodynamic drag. The amount of fuel savings is dictated by the following distances and the driving speeds. So, the overarching goal of this work is to explore driving preferences and behaviors when following in “CACC mode,” an area that remains largely unexplored. While in CACC mode, the brake and throttle actions are automated. A human factors study was conducted to investigate truck drivers’ experiences and performance using CACC at shorter-than-normal vehicle following time gaps. “On-the-road” experiments were conducted by recruiting drivers from commercial fleets to operate the second and third trucks in a three-truck CACC string. The driving route spanned 160 miles on freeways in Northern California and five different time gaps between 0.6 and 1.8 seconds were tested. Factors such as cut-ins by other vehicles, road grades, and traffic conditions were found to influence the drivers’ opinions about use of CACC. The findings presented in this paper provide insights into the factors that will influence driver reactions to the deployment of CACC in their truck fleets.

scholarly journals THE BITUMEN BATCHING SYSTEM'S MODERNIZATION AND ITS EFFECTIVE ANALYSIS AT THE ASPHALT MIXING PLANT

Transport ◽  
2010 ◽  
Vol 25 (3) ◽  
pp. 325-335 ◽  
Author(s):  
Justas Bražiūnas ◽  
Henrikas Sivilevičius
Keyword(s):  
Asphalt Concrete ◽  
Additive Model ◽  
Technological Parameters ◽  
Destructive Effect ◽  
The Road ◽  
Weighted Matrix ◽  
Bitumen Content ◽  
Before And After ◽  
On The Road ◽  
And Performance

Some particular aspects such as the improvement methods of technological parameters for hot bitu‐ men storage in a pipeline transport system, transportation and dosed supply to batch asphalt mixing plant (AMP) are evaluated in this paper. Bitumen in asphalt concrete binds together the material of mineral particles into a strong conglomerate of a complicated structure, capable of withstanding the destructive effect of vehicles and the factors on the road pavements. The optimal amount of bitumen determined by calculation and laboratory testing should be maintained in mix batches of hot‐mix asphalt (HMA) obtained from AMP mixer. In the periodic type of the asphalt concrete blender mass of the weighted matrix in the all merging batcher's tanks should correspond in percents equally in the HMA to the designed amount of the job‐mix formula (JMF). The bitumen batcher does not always weigh bitumen portions precisely. Their mass deviations from the amount determined by JMF and its variation impair HMA composition and performance. In addition,, an additive model for calculating the effect of factors causing the variance of bitumen content in the produced HMA mixture is presented in this current paper as well. The data on statistical evaluation of bitumen batcher's modernization performed at certain Lithuanian Enterprise are discussed. The differences in structures of reconstructed and not reconstructed bitumen batching systems (BBS) are analysed and methods of determining modernization effectiveness are presented. The effectiveness of BBS is analysed too, defining the deviations of bitumen content in subsamples, taken and extracted everyday for two seasons (before and after the batcher's modernization) of HMA mixture production from the value of JMF and comparing them to the values of tolerances. The analysis of column charts and histograms shows that the made modernization helped to increase the precision of supplying the required amount of bitumen to HMA mixture insignificantly. However, the control of BBS has been considerably increased.

scholarly journals Interpretation of Non-Exhaust Brake Emission Standard: Laboratory Testing

2021 ◽  
Author(s):  
Xinfeng Zhang ◽  
Cheng Tian ◽  
Zhihui Niu ◽  
Xudong Li
Keyword(s):  
Laboratory Testing ◽  
Exhaust Emission ◽  
Brake Disc ◽  
Emission Standard ◽  
The Road ◽  
New Energy ◽  
On The Road ◽  
Detailed Interpretation ◽  
Safety Systems ◽  
New Energy Vehicles

Now there are more and more new energy vehicles on the road, compare to the traditional vehicles that use the oil to offer the power, the new energy vehicles use electric or hydrogen to offer the power, which have no exhaust pollution emission, but also have non-exhaust emission. Brake and tyre system are the special components of vehicles due to the frequent replacement, they are the main source of the non-exhaust emission. Brake system is one of the most important safety systems of vehicles. The system can reduce the speed of the vehicle and keep the vehicle stable when going downhill. Friction between brake disc and pads or shoes during driving creates small particles that are released into the atmosphere, soil and rivers. The particles have different dimensions, some element or matter inside maybe harmful to human and environment. So it is very important to know more about the non-exhaust brake emission. Here, we focus on the specification of GRPE-81-12 “Non-Exhaust Brake Emissions – Laboratory testing – Part 1: Inertia Dynamometer Protocol to Measure and Characterise Brake Emissions Using the WLTP-Brake Cycle” and do the detailed interpretation.

Research and Experiment on the Road Performance of Scoria (Volcanic Ash)

2011 ◽  
Vol 243-249 ◽  
pp. 4101-4105
Author(s):  
Zhen Hua Fan
Keyword(s):  
Theoretical Basis ◽  
Volcanic Ash ◽  
Detection Method ◽  
Road Construction ◽  
Construction Technology ◽  
Engineering Property ◽  
The Road ◽  
Road Performance ◽  
On The Road ◽  
And Performance

According to the tests and researches, this paper combine the constructing condition of scoria (volcanic ash) subgrade and lime-volcanic ash gradation macadam subgrade and the result of investigation and detection after the test section is completed, the physicochemical property, engineering property, compaction mechanism and performance, formation mechanism and increasing rule of strength of scoria (volcanic ash) and lime-volcanic ash are systematically analyzed, propose the construction technology and detection method of scoria (volcanic ash) subgrade and lime-volcanic ash gradation macadam subgrade, provide technical support and theoretical basis for application of scoria (volcanic ash) on road construction.

scholarly journals An Indoor Vehicle-in-the-Loop Simulation Platform Testing Method for Autonomous Emergency Braking

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Ying Gao ◽  
Xiangmo Zhao ◽  
Zhigang Xu ◽  
Jingjun Cheng ◽  
Wenwei Wang
Keyword(s):  
Traffic Safety ◽  
Autonomous Vehicle ◽  
Testing Time ◽  
Simulation Platform ◽  
The Road ◽  
Emergency Braking ◽  
Safety Function ◽  
Fast Solution ◽  
On The Road ◽  
And Performance

Autonomous vehicle (AV) is expected to be the ultimate solution for traffic safety, while autonomous emergency braking (AEB), as a crucial and fundamental active safety function of AV, has excellent potential for reducing fatalities and improving road safety. Although AV has the ability to cope with harsh conditions, it is supposed to be tested fully, systematically, and rigorously before it is officially commercialized. This study developed a novel indoor AV-in-the-loop (AVIL) simulation platform based on Client-Server (C/S) architecture for real full-scale AV testing. The proposed AVIL simulation platform consists of three parts: physical hardware components, software components, and various electrical interfaces that ensure the bidirectional virtual reality (VR) interaction. To validate the functionality and performance of the platform, this paper then adopted the Udwadia–Kalaba (U-K) approach to build the AEB system based on a typical driving situation due to the explicitness and simplicity of the U-K approach. Further, a group of real road-based experiments and AVIL-based experiments were conducted. The experimental results showed that the testing data obtained from the proposed AVIL platform have a high similarity to those of the real road tests, which means that the proposed AVIL platform is capable of simulating the AV running condition when it performs linear emergency braking on the road, thus confirming the feasibility and effectiveness of the AVIL platform for AV AEB testing. Simultaneously, the testing time and repeatability of the latter performed better. The findings of this study provide a new safe, effective, and fast solution to AV testing, and the practicability of this method has been verified.

scholarly journals Needs Analysis for the Development of a Training Module for Hypercontent Examination Emission Inspection at the Ministry of Transportation

2020 ◽  
Vol 4 (4) ◽  
pp. 322
Author(s):  
Galuh Indri Kusumawati ◽  
R.A. Murti Kusuma Wirasti ◽  
Dwi Kusumawardani
Keyword(s):  
Air Pollution ◽  
Needs Analysis ◽  
Exhaust Emission ◽  
Exhaust Gas ◽  
Gas Emissions ◽  
The Road ◽  
The Media ◽  
On The Road ◽  
Motorized Vehicles ◽  
Exhaust Gas Emissions

The main factor of air pollution in Indonesia is motorized vehicles. Motorized vehicles operating on the road will produce exhaust gas emissions which result in air pollution. In overcoming exhaust gas emissions in vehicles, the Ministry of Transportation conducts training for exhaust emission inspection, and conducts training at one of the technical implementation units, namely the Indonesian Land Transportation Polytechnic (PTDI) STTD. The purpose of this study was to conduct a needs analysis to develop a hyper content learning module for training on exhaust emission examinations, using the R&D (research and Development) method using the Derek Rowntree model. The hyper content module is a module that combines hypertext, hyperlinks, and hypermedia, and the media used in the form of video, QR code, YouTube, and cloud computing. With the development of the hyper content module, it is possible to improve the understanding and learning outcomes of training participants in studying exhaust emissions from vehicles when compared to conventional learning.

Development and Performance of the Portable Skid Resistance Tester

1965 ◽  
Vol 38 (4) ◽  
pp. 840-862 ◽  
Author(s):  
C. G. Giles ◽  
B. E. Sabey ◽  
K. H. F. Cardew
Keyword(s):  
Field Trials ◽  
Test Surface ◽  
Skid Resistance ◽  
Textured Surfaces ◽  
Basic Principles ◽  
The Road ◽  
Factors Influencing ◽  
On The Road ◽  
And Performance ◽  
Patterned Tire

Abstract The portable skid-resistance tester can carry out a wide variety of measurements on the road and in the laboratory. This paper outlines the basic principles underlying the design of the tester and describes the laboratory and field trials conducted during the development of the instrument. The factors influencing its performance are emphasized. In its performance, the instrument behaves as a patterned tire skidding at 30 mph. It is particularly well suited for testing rough-textured surfaces, and readings are independent of gradient, camber, or crossfall on the test surface.

“Is God a Three-Letter Word for Love?”

2020 ◽  
pp. 159-186
Author(s):  
Vaughn A. Booker
Keyword(s):  
Religious Literature ◽  
Religious Thought ◽  
Letter Word ◽  
The Road ◽  
Sacred Spaces ◽  
Concepts Of God ◽  
Belief In God ◽  
On The Road ◽  
And Performance

This chapter charts the religious thought of the constantly touring Ellington as he made sense of God on the road without a regular church home. He theologized as he read the Christian Bible and engaged primarily liberal religious literature. Ellington embraced the authority to speak about God that listening audiences afforded him so that Protestants, Jews, and Catholics would accept his musical messages. His private lyrical writings expressed his belief in God, his frustrations with language to refer to God, and his appeal to the very act of believing. His undated hotel stationery writings, in conversation with his engagement of religious literature and ministerial friends, exist as the unexamined arena of his personal religious exploration, reflection, and contention in the process of crafting music to make public expressions of belief. Ultimately, the concepts of God and of love became synonymous for Ellington, and he articulated these most vocally in his final Sacred Concert. With Ellington’s private writings and public professions, his thoughts stand as prominent examples of theological wrestling. They complicate any conclusion that the profession of belief and performance of praise for the divine, within sacred spaces, serve to affirm wholesale the teachings about the divine within those theological communities.

scholarly journals Interference Rejection Combining Approach in Vehicle Communication Systems for Throughput Enhancement

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1922
Author(s):  
Yun-joong Park ◽  
Sang-mo Sung ◽  
Joon-young Kim ◽  
Jae-il Jung
Keyword(s):  
Communication Systems ◽  
High Speed ◽  
Interference Suppression ◽  
Wave System ◽  
Vehicle Speed ◽  
Interference Rejection ◽  
Performance Gain ◽  
The Road ◽  
On The Road ◽  
And Performance

In this paper, we present interference rejection combining scheme for interference suppression in wireless access in vehicular environments (WAVE) system. WAVE system performances depend on interference traffic since various signals and noises are present due to various vehicles on the road. The IRC scheme can minimize the interference presence from the received signal within the massive interference condition, resulting in the substantial gain of signal-to-interference and noise ratios (SINR) and performance. Based on the experiment of our proposed scheme, given the vehicle speed, SINR and different channel condition, our proposed scheme for interference suppression achieved significant improvements by 2 dB SINR performance gain in the low speed condition and above 0.5 dB performance gain at the high speed case. To extend our scheme for the comprehensive analysis, we also produced the vehicle speed and SINR performance map, which showed the performance pattern over vehicle speed and SINR of our scheme.

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