Restricted Number of Waiting Vehicles at a Merging Section in a PRT System with Connected Vehicles

2016 ◽  
Vol 136 (5) ◽  
pp. 373-374
Author(s):  
Chuan Tian ◽  
Takahiro Hoshino ◽  
Yoshio Hamamatsu
Keyword(s):  
Connected Vehicles ◽  
Restricted Number

An Edge-Computing Based Task-Unloading Technique with Privacy Protection for Internet of Connected Vehicles

2021 ◽  
Author(s):  
Hasnain Ali Almashhadani ◽  
Xiaoheng Deng ◽  
Suhaib Najeh Abdul Latif ◽  
Mohammed Mohsin Ibrahim ◽  
Ali Hussien Alshammari
Keyword(s):  
Privacy Protection ◽  
Edge Computing ◽  
Connected Vehicles

Past, Present, Future: An Overview of Roman Malta

2021 ◽  
Vol 7 (1) ◽  
pp. 231-255
Author(s):  
David Cardona
Keyword(s):  
Seventeenth Century ◽  
Predictive Model ◽  
Clear Picture ◽  
Maltese Islands ◽  
Restricted Number ◽  
The Subject ◽  
New Research

Abstract Roman Malta has been the subject of numerous historical and archaeological studies since the seventeenth century. However, the lack of documented excavations and the restricted number of sites – particularly those within the boundaries of the two main Roman towns – meant that numerous grey areas persist in our understanding of the islands under Roman rule, regardless of how many studies have been done so far. This article attempts to provide an overview of past works, studies and a discussion of the known consensus on knowledge of sites, populations and economies. This in an attempt to provide a clear picture of what we know (and what we do not) about Roman Malta. Finally, I will comment on current and new research and projects which are being carried out by various local entities and foreign institutions to enhance our knowledge of this very important historic era for the Maltese islands. This culminates into a proposal for the use of a predictive model that may help us identify new sites and, consequently, provide new data on this phase.

scholarly journals You Only Look Once, But Compute Twice: Service Function Chaining for Low-Latency Object Detection in Softwarized Networks

2021 ◽  
Vol 11 (5) ◽  
pp. 2177
Author(s):  
Zuo Xiang ◽  
Patrick Seeling ◽  
Frank H. P. Fitzek
Keyword(s):  
Machine Learning ◽  
Object Detection ◽  
Low Latency ◽  
Connected Vehicles ◽  
Network Nodes ◽  
Machine Learning Model ◽  
Fold Reduction ◽  
Broad Variety ◽  
Computational Resources ◽  
Service Latency

With increasing numbers of computer vision and object detection application scenarios, those requiring ultra-low service latency times have become increasingly prominent; e.g., those for autonomous and connected vehicles or smart city applications. The incorporation of machine learning through the applications of trained models in these scenarios can pose a computational challenge. The softwarization of networks provides opportunities to incorporate computing into the network, increasing flexibility by distributing workloads through offloading from client and edge nodes over in-network nodes to servers. In this article, we present an example for splitting the inference component of the YOLOv2 trained machine learning model between client, network, and service side processing to reduce the overall service latency. Assuming a client has 20% of the server computational resources, we observe a more than 12-fold reduction of service latency when incorporating our service split compared to on-client processing and and an increase in speed of more than 25% compared to performing everything on the server. Our approach is not only applicable to object detection, but can also be applied in a broad variety of machine learning-based applications and services.

Sequential Optimization of an Emergency Response Vehicle’s Intra-Link Movement in a Partially Connected Vehicle Environment

2021 ◽  
pp. 036119812110179
Author(s):  
Gaby Joe Hannoun ◽  
Pamela Murray-Tuite ◽  
Kevin Heaslip ◽  
Thidapat Chantem
Keyword(s):  
Emergency Response ◽  
Lateral Position ◽  
Automated System ◽  
Sequential Optimization ◽  
Connected Vehicles ◽  
Linear Programs ◽  
Connected Vehicle ◽  
Market Penetration ◽  
Short Term ◽  
New Approach

This paper introduces a semi-automated system that facilitates emergency response vehicle (ERV) movement through a transportation link by providing instructions to downstream non-ERVs. The proposed system adapts to information from non-ERVs that are nearby and downstream of the ERV. As the ERV passes stopped non-ERVs, new non-ERVs are considered. The proposed system sequentially executes integer linear programs (ILPs) on transportation link segments with information transferred between optimizations to ensure ERV movement continuity. This paper extends a previously developed mathematical program that was limited to a single short segment. The new approach limits runtime overhead without sacrificing effectiveness and is more suitable to dynamic systems. It also accommodates partial market penetration of connected vehicles using a heuristic reservation approach, making the proposed system beneficial in the short-term future. The proposed system can also assign the ERV to a specific lateral position at the end of the link, a useful capability when next entering an intersection. Experiments were conducted to develop recommendations to reduce computation times without compromising efficiency. When compared with the current practice of moving to the nearest edge, the system reduces ERV travel time an average of 3.26 s per 0.1 mi and decreases vehicle interactions.

scholarly journals The development and validation of the perceived safety of intelligent connected vehicles scale

2021 ◽  
Vol 154 ◽  
pp. 106092
Author(s):  
Jianqin Cao ◽  
Li Lin ◽  
Jingyu Zhang ◽  
Liang Zhang ◽  
Ya Wang ◽  
...  
Keyword(s):  
Connected Vehicles ◽  
Perceived Safety ◽  
Development And Validation

Using Traffic Disturbance Metrics to Estimate and Predict Freeway Traffic Breakdown and Safety Events

2021 ◽  
pp. 036119812110124
Author(s):  
Leila Azizi ◽  
Mohammed Hadi
Keyword(s):  
Traffic Safety ◽  
Management Strategies ◽  
Connected Vehicles ◽  
Freeway Traffic ◽  
Transportation Management ◽  
Time To Collision ◽  
Decision Tools ◽  
Traffic State ◽  
Traffic Performance ◽  
Traffic Disturbance

The introduction of connected vehicles, connected and automated vehicles, and advanced infrastructure sensors will allow the collection of microscopic metrics that can be used for better estimation and prediction of traffic performance. This study examines the use of disturbance metrics in combination with the macroscopic metrics usually used for the estimation of traffic safety and mobility. The disturbance metrics used are the number of oscillations and a measure of disturbance durations in the time exposed time to collision. The study investigates using the disturbance metrics in data clustering for better off-line categorization of traffic states. In addition, the study uses machine-learning based classifiers for the recognition and prediction of the traffic state and safety in real-time operations. The study also demonstrates that the disturbance metrics investigated are significantly related to crashes. Thus, this study recommends the use of these metrics as part of decision tools that support the activation of transportation management strategies to reduce the probability of traffic breakdown, ease traffic disturbances, and reduce the probability of crashes.

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