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On the Guadalupe River, Texans search for the missing
At the Guadalupe Keys Resort RV Park in Center Point, Texas, volunteers help remove debris and search for the missing on July 9.
Streaming Video
Big rigs : a first look
\"Big rigs can have eighteen wheels, sometimes more! With all the goods they carry around, they have to be big. Full-color photographs and leveled text give readers a peek inside these huge vehicles\"-- Provided by publisher.
BOOK
Simulation Analysis of the Semi-Trailer Steered Wheels Control Algorithm
As part of improving road safety around trucks, a solution was proposed to reduce the swept path width of a moving tractor–semi-trailer. This article presents a mathematical analysis of the movement of a tractor unit with a traditional semi-trailer with fixed axles and steered wheels. A simulation analysis of both presented vehicles was carried out. The core of the algorithm controlling the steering angle of the semi-trailer wheels is presented. The influence of controlling the semi-trailer’s swivel wheels on the swept path width of a tractor–trailer with a semi-trailer equipped with swivel wheels is discussed. The assumptions for building the control algorithm are presented. The article presents the advantages of the solution used along with the control algorithm. Measurable benefits resulting from the use of the presented solution are presented, such as increasing cargo space, reducing cargo transport costs, and reducing aerodynamic resistance and fuel consumption. It is worth emphasizing that reducing fuel consumption is very important because it reduces the emission of harmful exhaust gases into the atmosphere. The swept path width is important especially in the case of vehicles moving in a limited area, for example in the parking lots of transhipment and logistics centers, between urban buildings. Vehicles admitted to traffic meet the minimum conditions imposed by homologation regulations, but reducing the swept path width allows for improving the operational properties of the tractor–semi-trailer. The use of the proposed control algorithm to control the turn of the semi-trailer’s steered wheels brings tangible benefits both in improving road safety and in reducing the emission of harmful substances into the environment.
Journal Article
You may already be a winner
Twelve-year-old Olivia endeavors to care for her younger sister, possibly make a new friend in the quirky and secretive Bart, and keep hope alive for her, her family, and her community of idiosyncratic neighbors at Sunny Pines Trailer Park.
Book
Coming attractions : reading American movie trailers
Movie trailers—those previews of coming attractions before the start of a feature film—are routinely praised and reviled by moviegoers and film critics alike: “They give away too much of the movie.” “They’re better than the films.” “They only show the spectacular parts.” “They lie.” “They’re the best part of going to the movies.” But whether you love them or hate them, trailers always serve their purpose of offering free samples of a film to influence moviegoing decision-making. Indeed, with their inclusion on videotapes, DVDs, and on the Internet, trailers are more widely seen and influential now than at any time in their history. Starting from the premise that movie trailers can be considered a film genre, this pioneering book explores the genre’s conventions and offers a primer for reading the rhetoric of movie trailers. Lisa Kernan identifies three principal rhetorical strategies that structure trailers: appeals to audience interest in film genres, stories, and/or stars. She also analyzes the trailers for twenty-seven popular Hollywood films from the classical, transitional, and contemporary eras, exploring what the rhetorical appeals within these trailers reveal about Hollywood’s changing conceptions of the moviegoing audience. Kernan argues that movie trailers constitute a long-standing hybrid of advertising and cinema and, as such, are precursors to today’s heavily commercialized cultural forms in which art and marketing become increasingly indistinguishable.
eBook
Big rigs
\"This search-and-find book invites early readers to look for new vocabulary words and pictures while giving simple facts about semi trucks and how they are used to haul deliveries across the country\"--Provided by publisher.
Book
Branch-and-Price-and-Cut for the Truck-and-Trailer Routing Problem with Time Windows
In this paper, we present a new branch-and-price-and-cut algorithm to solve the truck-and-trailer routing problem with time windows (TTRPTW) and two real-world extensions. In all TTRPTW variants, the fleet consists of one or more trucks that may attach a trailer. Some customers are not accessible with a truck-and-trailer combination, but can however be serviced by one if the trailer is previously detached and parked at a suitable location. In the first extension, the planning horizon comprises two days and customers may be visited either on both days or only once, in which case twice the daily supply must be collected. The second extension incorporates load transfer times depending on the quantity moved from a truck to its trailer. The exact branch-and-price-and-cut algorithm for the standard variant and the two new extensions is based on a set-partitioning formulation in which columns are routes describing the movement of a truck and its associated trailer. Linear relaxations of this formulation are solved by column generation where new routes are generated with a dynamic programming labeling algorithm. The effectiveness of this pricing procedure can be attributed to the adaptation of techniques such as bidirectional labeling, the
ng
-neighborhood, and heuristic pricing using dynamically reduced networks and relaxed dominance. The cutting component of the branch-and-price-and-cut adds violated subset-row inequalities to strengthen the linear relaxation. Computational studies show that our algorithm outperforms existing approaches on TTRP and TTRPTW benchmark instances used in the literature.
The online appendix is available at
https://doi.org/10.1287/trsc.2017.0765
.
Journal Article
Grass Kings
Three brothers who rule their own trailer park kingdom must face off against the sheriff of a neighboring town who wants their territory. From The New York Times bestselling writer Matt Kindt ( Mind MGMT ) and artist Tyler Jenkins ( Peter Panzerfaust ) comes the critically acclaimed rural mystery series chronicling the tragic lives of the Grass Kings, three brothers and rulers of a self-sufficient trailer park kingdom - a fiefdom of the hopeless and lost seeking a promised land. The grass kingdom is run by eldest brother Robert, who has been grief-stricken since losing his daughter years ago. When a mysterious young woman flees to their community in search of safety, Robert takes her in. As her true identity comes to light, Robert must decide if his chance at atonement is worth risking the entire Kingdom.
Book
Dynamic Responses of a Single-Axle Trailer When Driving Over a Road Obstacle
Trailers for passenger cars are often used for the transportation of goods. There are various trailer designs. Most trailers are equipped with axles, which include swinging arms and are suspended by rubber segments. Observations have revealed that empty trailers have unfavorable driving properties when they are driven on uneven roads, for example, the wheels could jump off the road. Such a situation is dangerous because it is not possible to transmit any contact forces (longitudinal, lateral, or vertical) between the wheel and the road. The goal of the present research was to measure acceleration generated in a single-axle trailer when driving over a road obstacle. Measurements were conducted in a non-public area to avoid the risk of accidents. Acceleration was recorded using two accelerometers placed on the single-axle trailer frame above the wheels’ axle of rotation. Tests were performed using a vehicle–trailer combination at the chosen driving speeds, and the results for driving speeds of 20 and 30 km/h are presented. Wood plates with a height of 25 and 50 mm were used as an artificial road obstacle. The single-axle trailer was loaded with gravel bags weighing 0 to 300 kg. The measurements revealed that heavier trailer loads and lower driving speeds are safer for trailer operation. Furthermore, the measurements also demonstrated that the wheels were significantly more likely to jump off the road with a 0 kg load and low driving speed.
Journal Article