The Optical Environment of a Cylindrical Turret with a Flat Window and the Impact of Passive Control Devices

2005 ◽  
Author(s):  
Stanislav Gordeyev ◽  
Eric Jumper ◽  
Terry Ng ◽  
Alan Cain
Keyword(s):  
Passive Control ◽  
Control Devices ◽  
The Impact

Functional tests of the ETCS and rail traffic control systems

2021 ◽  
Vol 133 ◽  
pp. 15-26
Author(s):  
Paweł Drózd ◽  
Adam Rosiński
Keyword(s):  
Traffic Control ◽  
Functional Model ◽  
Field Tests ◽  
Base Layer ◽  
Initial State ◽  
Railway Traffic ◽  
Control Devices ◽  
Traffic Control Devices ◽  
The Cost ◽  
The Impact

The paper presents the issues of railway traffic control devices testing and focuses on European Train Control System (ETCS) devices widely implemented in railways. The functions of the ETCS system, principles of operation are described. The basic telegrams transmitted in the track-to-train relation are listed. The process of designing and verifying the implemented data and what parameters are checked at the stage of field tests using the locomotive is briefly described. The functional model of the SRK devices, including ETCS elements, was presented, and the close relationship between the base layer of the railway traffic control devices and the ETCS was shown. Equipment testing reduces the availability of the rail network, engages staff, and generates costs. A test generation method is presented to minimize the impact. Two indicators are proposed for reducing the set of checks, the cost of checking and the information effectiveness. The cost of checking due to the problematic estimate is generalized, divided into three groups taking into account the difficulty and resource consumption of bringing the devices to the initial state and their operation according to the test. Therefore, the obtained set of checks is suboptimal and ensures complete coverage of the functions with tests, which is essential when testing devices. The tests are carried out using available setting commands and the implementation of tasks - entry and exit routes at the station. The proposed method is universal and can be applied to any railway traffic control device, regardless of the manufacturing technology. It is a non-invasive method in the structure of the tested devices and does not require additional hardware resources.

Liner Deployed Flow Control Devices in SAGD Infill Producers

2021 ◽  
Author(s):  
Michael Hardcastle ◽  
Ryan Holmes ◽  
Frank Abbott ◽  
Jesse Stevenson ◽  
Aubrey Tuttle
Keyword(s):  
Flow Control ◽  
Oil And Gas ◽  
Distributed Temperature Sensing ◽  
Steam Assisted Gravity Drainage ◽  
Well Production ◽  
Flow Control Devices ◽  
Control Devices ◽  
The Impact ◽  
Mobility Variable

Abstract Connacher Oil and Gas has deployed Flow Control Devices (FCDs)on an infill well liner as part of a Steam Assisted Gravity Drainage (SAGD) exploitation strategy. Infill wells are horizontal wells drilled in between offsetting SAGD well pairs in order to access bypassed pay and accelerate recovery. These wells can have huge variability in productivity, based on several factors: variable initial temperature due to variable steam chamber development and initial mobility variable injectivity from day one limiting steam circulation and stimulation significant hot spots during production that limit drawdown of the well and oil productivity FCDs have shown great value in several SAGD schemes and are becoming common throughout SAGD applications to manage similar challenges in SAGD pairs, but their application in infill wells is less prevalent and presents a novel challenge to design and evaluate performance. This case study will examine the theory, operation, and early field results of this field trial. Density-based FCDs designed for thermal operations were selected to minimize the impact of viscous fluids commonly encountered early in cold infill well production. The design also limited steam outflow during the stimulation phase, where steam is injected in order to initiate production of the well. Distributed Temperature Sensing (DTS) data, pressures and rates are utilized to analyze the impact of the FCDs towards conformance of the well in the early life. The value of FCDs has led to further piloting of this technology in a second group of nine infill wells, where further value is to be extracted using slimmer wellbores.

Effect of Pedestrian-Related Factors on Intersection Performance

2005 ◽  
Vol 1920 (1) ◽  
pp. 65-73
Author(s):  
Hoe Kyoung Kim ◽  
Michael P. Hunter
Keyword(s):  
Traffic Control ◽  
National Standard ◽  
Related Factors ◽  
Minimal Impact ◽  
Traffic Lane ◽  
Cycle Lengths ◽  
Control Devices ◽  
Traffic Control Devices ◽  
Walking Speeds ◽  
The Impact

The Manual on Uniform Traffic Control Devices (MUTCD) contains the national standard for installing and maintaining traffic control devices on all streets and highways. The 2003 MUTCD contains numerous corrections, revisions, and updates to the millennium edition (2000). One update is related to the definition of crossing distance at signalized intersections, where the crossing distance is extended to the far-side curb rather than the center of the farthest traffic lane. This study investigated the sensitivity of intersection performance to crossing distance and walking speed, critical constraints in the determination of the minimum green time. Three crossing distance standards and four walking speeds are considered. With Highway Capacity Manual (HCM) procedures, the impacts of the given crossing distance definitions and walking speeds on intersection operations were tested on two intersection configurations over a range of cycle lengths and traffic volumes. The effect on intersection performance was found to be most significant at low cycle lengths, in some instances with the delay increased manyfold. However, when cycle lengths were increased to account for the pedestrian constraints, optimal delay rarely increased by more than a few seconds. Additionally, as the discrepancy between the critical lane traffic volume on the main and cross streets was increased, the impact of pedestrian green times on vehicle delay also increased. It was seen that as the cycle length increased, pedestrian minimum green times no longer governed, so the impact of pedestrians on intersection performance became increasingly insignificant, often with a minimal impact on the optimal performance.

Development of Active and Passive Fatigue Manipulations Using a Driving Simulator

2007 ◽  
Vol 51 (18) ◽  
pp. 1237-1241 ◽  
Author(s):  
Dyani J. Saxby ◽  
Gerald Matthews ◽  
Edward M. Hitchcock ◽  
Joel S. Warm
Keyword(s):  
Time Course ◽  
Passive Control ◽  
Driving Simulator ◽  
Negative Mood ◽  
Subjective Response ◽  
Passive Condition ◽  
Full Control ◽  
Active Condition ◽  
The Impact ◽  
Simulated Wind

The present study investigates driving simulator methodologies for inducing qualitatively different patterns of subjective response. The study tested Desmond and Hancock's (2001) theory that there may be two types of fatigue: active and passive. 108 undergraduates participated. There were 3 conditions (active, passive, control) and 3 durations (10, 30, 50 minutes). The active condition used simulated wind gusts to increase the required number of steering and acceleration changes. The passive condition was fully automated. In the control condition, drivers were in full control of steering and acceleration. Task engagement (e.g., energy) was lowest in the passive fatigue condition, followed by the control and active conditions. Distress (e.g., negative mood) was found to be highest in the active fatigue condition. The time course of fatigue responses was also determined. The results suggest methods for developing manipulations to determine the impact of fatigue on performance.

Some aspects of project management in terms of design automation for railway traffic control devices

2018 ◽  
Vol 121 ◽  
pp. 411-421
Author(s):  
Paweł Wontorski ◽  
Andrzej Kochan
Keyword(s):  
Project Management ◽  
Traffic Control ◽  
Design Automation ◽  
Graphical Form ◽  
Project Management System ◽  
Railway Traffic ◽  
Selection Of Variables ◽  
Control Devices ◽  
Traffic Control Devices ◽  
The Impact

The article presents the concept of integration system of design automation and system of project management. A model was developed cooperation between the two systems on several levels, based on continuous monitoring of the design process and comparing the assumed values of the selected parameters from the actual values. The selection of variables transmitted based on the assumption of cooperation project management system with the system of design automation for railway traffic control devices, designed to support of designers. Due to the nature of projects for railway traffic control devices drew attention to the quality control of the project in the context of the safety and reliability of railway traffic control system, the impact of deviations from the schedule to the railway timetable, version compatibility, and changes in the chamfering work on objects with continuous rail traffic. The structure of the model is presented in graphical form.

The Impact of Rotating Control Devices on the Incidence of Blowouts: A Case Study for Onshore Texas, USA

2011 ◽  
Vol 26 (03) ◽  
pp. 364-370 ◽  
Author(s):  
Christopher Jablonowski ◽  
Augusto L. Podio
Keyword(s):  
Control Devices ◽  
The Impact

Quantifying the Impact of Flow Control Devices in SAGD Applications in the Surmont Area Through Numerical Analysis

2014 ◽  
Author(s):  
Somiari Ajumogobia-Bestman ◽  
Robert Jobling ◽  
Erik Pederson ◽  
Andrew Cao
Keyword(s):  
Numerical Analysis ◽  
Flow Control ◽  
Flow Control Devices ◽  
Control Devices ◽  
The Impact

The Impact of Rotating Control Devices on the Incidence of Blowouts: A Case Study for Onshore Texas, USA

2010 ◽  
Author(s):  
Christopher J. Jablonowski ◽  
Augusto L. Podio
Keyword(s):  
Control Devices ◽  
The Impact

Control of Shear Cutting Noise: Effectiveness of Passive Control Measures

2002 ◽  
Vol 33 (7) ◽  
pp. 6-12
Author(s):  
Joseph C. S. Lai ◽  
Colin Speakman ◽  
Hugh M. Williamson
Keyword(s):  
Noise Reduction ◽  
Passive Control ◽  
Poor Performance ◽  
Metal Sheet ◽  
Control Measures ◽  
Noise Abatement ◽  
The Cost ◽  
The Impact

In an attempt to reduce noise from roll former shears three noise abatement enclosures of different designs and sheet dampers were assessed. Results indicate that only a noise reduction of 5dB can be achieved at the operator position by noise abatement enclosures, virtually independent of their designs and materials. This rather poor performance of enclosures is basically caused by structure-borne paths whereby vibrations are transmitted through the metal sheet product itself from the inside of the enclosure to the outside. Sheet dampers which have been designed to reduce the impact induced vibrations of the sheet product achieves a similar noise reduction as the enclosures but at about one quarter of the cost.

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