System design description for portable 1,000 CFM exhauster Skids POR-007/Skid E and POR-008/Skid F

DOE Office of Scientific and Technical Information (OSTI.GOV)

Nelson, O.D.

1998-07-25

The primary purpose of the two 1,000 CFM Exhauster Skids, POR-007-SKID E and POR-008-SKID F, is to provide backup to the waste tank primary ventilation systems for tanks 241-C-106 and 241-AY-102, and the AY-102 annulus in the event of a failure during the sluicing of tank 241-C-106 and subsequent transfer of sluiced waste to 241-AY-102. This redundancy is required since both of the tank ventilation systems have been declared as Safety Class systems.

Evaluation of Fine Aggregate Morphology by Image Method and Its Effect on Skid-Resistance of Micro-Surfacing.

PubMed

Xiao, Yue; Wang, Feng; Cui, Peide; Lei, Lei; Lin, Juntao; Yi, Mingwei

2018-05-29

Micro-surfacing is a widely used pavement preventive maintenance technology used all over the world, due to its advantages of fast construction, low maintenance cost, good waterproofness, and skid-resistance performance. This study evaluated the fine aggregate morphology and surface texture of micro-surfacing by AIMS (aggregate image measurement system), and explored the effect of aggregate morphology on skid-resistance of single-grade micro-surfacing. Sand patch test and British pendulum test were also used to detect skid-resistance for comparison with the image-based method. Wet abrasion test was used to measure skid-resistance durability for feasibility verification of single-grade micro-surfacing. The results show that the effect of Form2D on the skid-resistance of micro-surfacing is much stronger than that of angularity. Combining the feasibility analysis of durability and skid-resistance, 1.18⁻2.36 grade micro-surfacing meets the requirements of durability and skid-resistance at the same time. This study also determined that, compared with British pendulum test, the texture result obtained by sand patch test fits better with results of image method.

Sediment pathways in a tropical forest: effects of logging roads and skid trails

NASA Astrophysics Data System (ADS)

Sidle, Roy C.; Sasaki, Shozo; Otsuki, Mieko; Noguchi, Shoji; Rahim Nik, Abdul

2004-03-01

Significant erosion occurred from recently constructed forest logging roads and skid trails in a small headwater catchment in Peninsular Malaysia. Soil loss was estimated by measuring dimensions of all significant rills and gullies along the road, as well as by measuring height of preserved soil pedestals in sidecast and fill material and on skid trails. Estimates of surface erosion from logging roads and skid trails were 272 +/- 20 t ha-1 year-1 and 275 +/- 20 t ha-1 year-1 respectively. However, owing to lack of connectivity of skid trails to the stream, much of the sediment mobilized on skid trails was stored either on adjacent hillslopes or the trails themselves, rather than being transported to the stream system, as was the case for the road. Steeper skid trails (>20% gradient) had slightly higher erosion rates (320 +/- 24 t ha-1 year-1) than trails with gentler gradients (245-264 t ha-1 year-1). Some 60% of the soil loss on logging roads comes from erosion of the running surface. Disturbed cut and fill material along the road supplied the remaining 40% of the soil loss from roads. Roads and skid trails had no designed drainage systems; runoff discharged onto the hillslope at 25 major discharge nodes from the logging road (690 m total length) and at 34 nodes from skid trails (2300 m). Sediment pathways were either fully or moderately connected to headwater channels at 64% of the logging road nodes, but at only 26% of the nodes emanating from skid trails. A detailed sediment budget revealed that 78% of the soil loss from the road system (including log landings) was delivered to the stream in the first 16 months after logging began. Most (90%) of the deposition from skid trails occurred below just three discharge nodes. Runoff from and onto skid trails often exacerbated the sediment connectivity to channels. Clearly, sediment discharge from logging roads was more highly connected to the stream than discharge from skid trails. Once in the channel, much of this sediment was temporarily stored in the floodplain and behind woody debris.

Best management practices for erosion control from bladed skid trails

Treesearch

Charles R. Wade; W. Michael Aust; M. Chad Bolding; William A. Lakel III

2012-01-01

Sediment from forest operations is primarily associated with roads and skid trails. We evaluated five skid trail closure treatments applied to bladed skid trails in the Virginia Piedmont. Closure treatments were Waterbars, Seed, Mulch, Pine slash, and Hardwood slash. Sediment traps were used to collect monthly sediment samples for one year. The Mulch, Pine slash, and...

X-38 Landing Gear Skid Test Report

NASA Technical Reports Server (NTRS)

Gafka, George K.; Daugherty, Robert H.

2000-01-01

NASA incorporates skid-equipped landing gear on its series of X-38 flight test vehicles. The X-38 test program is the proving ground for the Crew Return Vehicle (CRV) a gliding parafoil-equipped vehicle designed to land at relatively low speeds. The skid-equipped landing gear is designed to attenuate the vertical landing energy of the vehicle at touchdown using crushable materials within the struts themselves. The vehicle then slides out as the vehicle horizontal energy is dissipated through the skids. A series of tests was conducted at Edwards Airforce Base (EAFB) in an attempt to quantify the drag force produced while "dragging" various X-38 landing gear skids across lakebed regions of varying surface properties. These data were then used to calculate coefficients of friction for each condition. Coefficient of friction information is critical for landing analyses as well as for landing gear load and interface load analysis. The skid specimens included full- and sub-scale V201 (space test vehicle) nose and main gear designs, a V131/V 132 (atmospheric flight test vehicles) main gear skid (actual flight hardware), and a newly modified, full-scale V201 nose -ear skid with substantially increased edge curvature as compared to its original design. Results of the testing are discussed along with comments on the relative importance of various parameters that influence skid stability and other dynamic behavior.

19 CFR 10.41a - Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of international...

Code of Federal Regulations, 2011 CFR

2011-04-01

... 19 Customs Duties 1 2011-04-01 2011-04-01 false Lift vans, cargo vans, shipping tanks, skids... Traffic § 10.41a Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of international traffic; repair components. (a)(1) Lift vans, cargo vans, shipping tanks, skids, pallets, caul...

19 CFR 10.41a - Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of international...

Code of Federal Regulations, 2010 CFR

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Lift vans, cargo vans, shipping tanks, skids... Traffic § 10.41a Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of international traffic; repair components. (a)(1) Lift vans, cargo vans, shipping tanks, skids, pallets, caul...

The effect of contaminant on skid resistance of pavement surface

NASA Astrophysics Data System (ADS)

Lubis, A. S.; Muis, Z. A.; Gultom, E. M.

2018-03-01

Skid resistance of the pavement surface is the force generated by the movement of the wheels of the vehicle on the surface of the pavement. Contaminants are materials that cover the surface of the pavement affecting the skid resistance of the pavement surface. The contaminant acts as a coating interface or direct contact of the pavement surface with the wheels of the vehicle which can cause adverse effects, such as the decreasing value of skid resistance of the pavement surface. This study aims to analyze the effect of some types of contaminants on skid resistance of pavement surfaces. The contaminants that used in this study were water, sand, salt, and lubricating oil. The study was conducted by direct testing on two types of pavement: flexible pavement and rigid pavement. The measurements of the skid resistance were made using the British Pendulum Tester with British Pendulum Number for two conditions: before and after the pavement surface was covered with contaminants. The results showed that there was a contaminant effect on skid resistance of pavement surface. Skid resistance of pavement surfaces decreased after the contaminants were covered in water, sand, salt, and lubricant by 20.1%, 22.8%, 37.1% and 50.5% respectively.

Changes in soil bulk density resulting from construction and conventional cable skidding using preplanned skid trails

Treesearch

Jingxin Wang; Chris B. LeDoux; Pam Edwards

2007-01-01

A harvesting system consisting of chainsaw felling and cable skidder extraction was studied to determine soil bulk density changes in a central Appalachian hardwood forest site. Soil bulk density was measured using a nuclear gauge preharvest and postharvest systematically across the harvest site, on transects across skid trails, and for a subset of skid trail transects...

A decision algorithm for determining safe clearing limits for the construction of skid roads

Treesearch

Chris LeDoux

2006-01-01

The majority of the timber harvested in the United States is extracted by ground-based skidders and crawler/dozer systems. Ground-based systems generally require a primary transportation network (a network of skid trails/roads) throughout the area being harvested. Logs are skidded or dragged along these skid roads/trails as they are transported from where they were cut...

Mor-Bell Logger: Skidding Case Study

Treesearch

Bryce J. Stokes; Jerry L. Koger; Frank J. Pickle

1983-01-01

A production equation was developed for the Mor-Bell logger for skidding while thinning a loblolly pine plantation. Production and costs for skidding and iron gate delimbing were determined for a range of operating conditions.

Portable exhauster POR-007/Skid E and POR-008/Skid F storage plan

DOE Office of Scientific and Technical Information (OSTI.GOV)

Nelson, O.D.

1998-07-25

This document provides storage requirements for 1,000 CFM portable exhausters POR-O07/Skid E and POR-008/Skid F. These requirements are presented in three parts: preparation for storage, storage maintenance and testing, and retrieval from storage. The exhauster component identification numbers listed in this document contain the prefix POR-007 or POR-008 depending on which exhauster is being used.

Measurement, Construction, and Maintenance of Skid-Resistant Airport Pavement Surfaces

DOT National Transportation Integrated Search

1997-03-18

This advisory circular (AC) contains guidelines and procedures for the design : and construction of skid-resistant pavement, pavement evaluation with friction : measuring equipment, and maintenance of high skid-resistant pavements. 45p.

Generation of urban road dust from anti-skid and asphalt concrete aggregates.

PubMed

Tervahattu, Heikki; Kupiainen, Kaarle J; Räisänen, Mika; Mäkelä, Timo; Hillamo, Risto

2006-04-30

Road dust forms an important component of airborne particulate matter in urban areas. In many winter cities the use of anti-skid aggregates and studded tires enhance the generation of mineral particles. The abrasion particles dominate the PM10 during springtime when the material deposited in snow is resuspended. This paper summarizes the results from three test series performed in a test facility to assess the factors that affect the generation of abrasion components of road dust. Concentrations, mass size distribution and composition of the particles were studied. Over 90% of the particles were aluminosilicates from either anti-skid or asphalt concrete aggregates. Mineral particles were observed mainly in the PM10 fraction, the fine fraction being 12% and submicron size being 6% of PM10 mass. The PM10 concentrations increased as a function of the amount of anti-skid aggregate dispersed. The use of anti-skid aggregate increased substantially the amount of PM10 originated from the asphalt concrete. It was concluded that anti-skid aggregate grains contribute to pavement wear. The particle size distribution of the anti-skid aggregates had great impact on PM10 emissions which were additionally enhanced by studded tires, modal composition, and texture of anti-skid aggregates. The results emphasize the interaction of tires, anti-skid aggregate, and asphalt concrete pavement in the production of dust emissions. They all must be taken into account when measures to reduce road dust are considered. The winter maintenance and springtime cleaning must be performed properly with methods which are efficient in reducing PM10 dust.

93. VIEW OF LIQUID OXYGEN TOPPING TANK BEHIND SKID 9 ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

93. VIEW OF LIQUID OXYGEN TOPPING TANK BEHIND SKID 9 AND GASEOUS NITROGEN TANKS BEHIND SKID 7 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

The Demise of Skid Row.

ERIC Educational Resources Information Center

Siegal, Harvey A.; Inciardi, James A.

1982-01-01

Describes the history and evolution of the American skid row; analyzes the changes it has undergone, particularly in the face of urban renewal; and speculates on its future. Includes opinions of the inhabitants of skid row which were obtained from interviews. (MJL)

Televised movie trailers: undermining restrictions on advertising tobacco to youth.

PubMed

Healton, Cheryl G; Watson-Stryker, Ella S; Allen, Jane Appleyard; Vallone, Donna M; Messeri, Peter A; Graham, Philip R; Stewart, Anna M; Dobbins, M David; Glantz, Stanton A

2006-09-01

To determine the proportion of televised movie trailers that included images of tobacco use during 1 year and the extent of youth exposure to those trailers. Content analysis combined with Nielsen data measuring media exposure. All movie trailers (N = 216) shown on television from August 1, 2001, through July 31, 2002. Exposure among youth aged 12 to 17 years to televised movie trailers that included smoking imagery. Of the movie trailers televised during the study period, 14.4% (31 trailers) included images of tobacco use. Tobacco use was shown in 24.0% of the 23 trailers for R-rated (restricted) movies and 7.5% of the 8 trailers for PG-13- and PG-rated (parental guidance) movies. Ninety-five percent of all youth aged 12 to 17 years in the United States saw at least 1 movie trailer depicting tobacco use on television during this 1 year, and 88.8% saw at least 1 of these trailers 3 or more times. Nearly all US youth aged 12 to 17 years were exposed to images of tobacco use on television in the context of a movie trailer during the study period. Given the relationship between youth exposure to tobacco use in movies and smoking initiation, the public health community should work to enact policy to reduce or eliminate the influence of tobacco use in televised movie trailers.

Variations in skid resistance over time.

DOT National Transportation Integrated Search

1980-01-01

The purpose of this project was to quantify the magnitude of changes in skid resistance over time, to isolate the variables that seem most important with respect to the changes, and, to the degree possible, formulate a model for converting skid resis...

Evaluation of skid test automatic digital recording system.

DOT National Transportation Integrated Search

1974-01-01

The Virginia skid vehicle has been equipped with a digital data recording system to provide rapid reduction of skid measurement data. It was found that five to ten minutes are required to evaluate a single measurement using the original analog strip ...

Test procedures and data input techniques for skid testing.

DOT National Transportation Integrated Search

1974-01-01

The purpose of this report is to describe the system for obtaining and handling skid data, including skid testing procedures and data input procedures. While all testing devices used in Virginia are covered (other than the British portable tester), t...

Requirements for munitions lift trailers to support strategic bombers

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

1985-05-21

Munitions lift trailers are large support vehicles used to transport and load air launched cruise missiles and other nuclear weapons onto strategic bombers. The Air Force has identified total requirements for 245 trailers for B-52 and B-1B bombers. About one-third of these trailers have been acquired. The Air Force Aeronautical Systems Command is considering remanufacturing 80 of the lift trailers it has acquired for B-52s to incorporate recent design improvements which are expected to make these trailers easier to operate and less costly to support. GAO believes Air Force requirements for new trailers may be overstated by as many asmore » 39 trailers. This could result in the unnecessary expenditure of up to $13 million. GAO also questions the cost effectiveness of remanufacturing the 80 trailers, which would cost $20 million.« less

Field evaluation of skid resistant surfaces : final report : part I.

DOT National Transportation Integrated Search

1970-06-01

This project was undertaken to establish a thin bituminous surface course that would possess good skid resistant qualities as well as, being both economical and durable. : This is the final report on the evaluation of skid resistant surfaces which wa...

Acceptance Test Procedure for New Pumping Instrumentation and Control Skid Q

DOE Office of Scientific and Technical Information (OSTI.GOV)

KOCH, M.R.

2000-03-27

This Acceptance Test Procedure (ATP) provides for the inspection and testing of the new Pumping Instrumentation and Control (PIC) skid designed as ''Q''. The ATP will be performed after the construction of the PIC skid in the fabrication shop.

90. VIEW OF OXIDIZER APRON AND SOUTH SIDE OF SKID ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

90. VIEW OF OXIDIZER APRON AND SOUTH SIDE OF SKID 9, SKID 7, AND SKID 9A. COOLING TOWER ON NORTH SIDE OF OXIDIZER APRON. LEFT TO RIGHT IN BACKGROUND: METEOROLOGICAL TOWER, SLC-3W MST, SURPLUS ATLAS E/F LAUNCHER, PYROTECHNIC SHED (BLDG. 757), STORAGE SHED (BLDG. 776), CABLE TRAYS, AND TOP OF LAUNCH OPERATIONS BUILDING (BLDG. 763). - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Estimation of Skidding Offered by Ackermann Mechanism

NASA Astrophysics Data System (ADS)

Rao, Are Padma; Venkatachalam, Rapur

2016-04-01

Steering for a four wheeler is being provided by Ackermann mechanism. Though it cannot always provide correct steering conditions, it is very popular because of its simple nature. A correct steering would avoid skidding of the tires, and thereby enhance their lives as the wear of the tires is reduced. In this paper it is intended to analyze Ackermann mechanism for its performance. A method of estimating skidding due to improper steering is proposed. Two parameters are identified using which the length of skidding can be estimated.

Relationships between skid numbers, paving materials and mix design, and accumulated traffic.

DOT National Transportation Integrated Search

1977-01-01

The objectives of this study were to determine the periods of time over which materials used in pavement surfaces provide adequate skid resistance and to classify various aggregate sources on the basis of the skid resistance qualities of the material...

Evaluation of skid inventory data for development of trends : pilot study : final report.

DOT National Transportation Integrated Search

1983-12-01

This study examined historical data of the skid resistance inventory in Louisiana from 1974 through 1981 to determine trends. The data showed that no trend exists when using number of vehicle passes versus skid number difference on any surface presen...

Skid resistance study : final report.

DOT National Transportation Integrated Search

1977-06-01

This is a report of a research project involving, in Phase I, the skid resistance of asphaltic concrete overlays. Phase II is a report of a pilot study set up in order to determine the best way to perform a skid resistance inventory of the highway ne...

New findings regarding the significance of pavement skid resistance for road safety on Swiss freeways.

PubMed

Lindenmann, H P

2006-01-01

The significance of the influence of poor pavement skid resistance values on accident frequency in wet pavement conditions has been the object of many studies over several years. The various investigations have produced very diverse findings. Only seldom, however, has detailed consideration been given to the central question of whether pavement skid resistance is a decisive parameter in the occurrence of local accident "black spots." Until now, the focus has been more on describing a relationship between pavement skid resistance and accident frequency. In the course of the network-wide survey of the states of pavements and of accident occurrence on Switzerland's freeways from 1999 to 2003, it emerged that a relationship with inadequate pavement skid resistance was provable for only a small proportion of accident black spots. These findings were used to frame a guideline for authorities and highway operators about how to treat skid resistance when assessing pavements and accident occurrence on freeways.

Validation of asphalt mixture pavement skid prediction model and development of skid prediction model for surface treatments.

DOT National Transportation Integrated Search

2017-04-01

Pavement skid resistance is primarily a function of the surface texture, which includes both microtexture and macrotexture. Earlier, under the Texas Department of Transportation (TxDOT) Research Project 0-5627, the researchers developed a method to p...

Skidding Coefficients on an Alluvial Soil

Treesearch

W. N. Darwin

1965-01-01

The Southern Hardwoods Laboratory is studying the influence of ground conditions and load characteristics on the performance of skidding vehicles in southern bottom lands. The exploratory test was aimed at evaluating the effects of bark on skidding coefficients, but it also yielded information on other log characteristics and on effects of soil moisture.

Effectiveness and costs of overland skid trail BMPs

Treesearch

Clay Sawyers; W. Michael Aust; M. Chad Bolding; William A. Lakel III

2012-01-01

Forestry Best Management Practices (BMPs) are designed to protect water quality; however, little data exists comparing the efficacy and costs of different BMP options for skid trail closure. Study objectives were to evaluate erosion control effectiveness and implementation costs of five overland skid trail closure techniques. Closure techniques were: waterbar only (...

Friction and wear characteristics of wire-brush skids

NASA Technical Reports Server (NTRS)

Dreher, R. C.

1979-01-01

The testing technique consisted of towing the skids with a ground test vehicle over asphalt and concrete surfaces at ground speeds up to 80 km/hr (50 mph) and bearing pressures up to 689 kPa (100 psi) over sliding distances up to 1585 m (5200 ft). Results indicate that the friction coefficient developed by wire brush skids is essentially independent of ground speed, is slightly increased with increasing bearing pressure, is noticeably affected by surface texture, and is not degraded by surface wetness. Skid wear is shown to increase with increasing bearing pressure and with increasing ground speed and is dependent on the nature of the surface. Runway surface damage caused by the skids was in the form of an abrasive scrubbing action rather than physical damage.

The effect of aggregate type and mix design on the wet skid resistance of bituminous pavement : recommendations for Virginia's Wet Accident Reduction Program.

DOT National Transportation Integrated Search

1995-01-01

This report (1) identified and characterized Virginia's nonpolishing aggregates in terms of their wet skid resistance, (2) compared the standard ASTM E 274-90 skid test to the British Accelerated Polishing Machine (BAPM) and British PendulumTester (B...

14 CFR 29.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2010 CFR

2010-01-01

...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions... along the bottom of both skids, the vertical reactions must be applied as prescribed in paragraph (a) of this section. (c) Drag reactions in the level landing attitude. In the level attitude, and with the...

14 CFR 29.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2011 CFR

2011-01-01

...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions... along the bottom of both skids, the vertical reactions must be applied as prescribed in paragraph (a) of this section. (c) Drag reactions in the level landing attitude. In the level attitude, and with the...

14 CFR 27.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2010 CFR

2010-01-01

...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions... along the bottom of both skids, the vertical reactions must be applied as prescribed in paragraph (a) of this section. (c) Drag reactions in the level landing attitude. In the level attitude, and with the...

14 CFR 27.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2011 CFR

2011-01-01

...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions... along the bottom of both skids, the vertical reactions must be applied as prescribed in paragraph (a) of this section. (c) Drag reactions in the level landing attitude. In the level attitude, and with the...

Soil Wetness Influences Log Skidding

Treesearch

William N. Darwin

1960-01-01

One of the least explored variables in timber harvesting is the effect of ground conditions on log production . The Southern Hardwoods Laboratory is studying this variable and its influence on performance of skidding vehicles in Southern bottom lands. The test reported here was designed to evaluate the effects of bark features on skidding coefficients, but it also...

Evaluation of drilled-ball bearings at DN values to three million. 2: Experimental skid study and endurance tests

NASA Technical Reports Server (NTRS)

Holmes, P. W.

1972-01-01

Both drilled-and solid-ball 120-mm-bore bearings were tested at speeds up to 24,000 rpm to determine skid characteristics. The thrust loads were varied from 5000 lb down to 370 lb. No gross skidding occurred, and the behavior of the two bearing types was generally similar; however, two drilled-ball bearing failures occurred during the skid tests. In the endurance tests, 25 cycles of start, run (for one hour), and stop were completed before a drilled-ball bearing failed. In all three cases, the ball had failed in flexure fatigue.

An investigation of the internal and external aerodynamics of cattle trucks

NASA Technical Reports Server (NTRS)

Muirhead, V. U.

1983-01-01

Wind tunnel tests were conducted on a one-tenth scale model of a conventional tractor trailer livestock hauler to determine the air flow through the trailer and the drag of the vehicle. These tests were conducted with the trailer empty and with a full load of simulated cattle. Additionally, the drag was determined for six configurations, of which details for three are documented herein. These are: (1) conventional livestock trailer empty, (2) conventional trailer with smooth sides (i.e., without ventilation openings), and (3) a stream line tractor with modified livestock trailer (cab streamlining and gap fairing). The internal flow of the streamlined modification with simulated cattle was determined with two different ducting systems: a ram air inlet over the cab and NACA submerged inlets between the cab and trailer. The air flow within the conventional trailer was random and variable. The streamline vehicle with ram air inlet provided a nearly uniform air flow which could be controlled. The streamline vehicle with NACA submerged inlets provided better flow conditions than the conventional livestock trailer but not as uniform or controllable as the ram inlet configuration.

Alternative skid trail retirement options for steep terrain logging

Treesearch

Mathew F. Smidt; Randall K. Kolka

2001-01-01

In winter 1999-2000 trials of deep tillage and recontouring of skid trails were implemented on three sites in northeastern Kentucky, USA to examine their potential as skid trail retirement options. While effective, current Best Management Practices (BMPs) for trail retirement do not address two potential benefits of retirement: recovery of normal hill slope hydrology...

Alternative skid trail retirement options for steep terrain logging

Treesearch

Mathew F. Smidt; Randall K. Kelka

2001-01-01

In winter 1999-2000 trials of deep tillage and recontouring of skid trails were implemented on three sites in northeastern Kentucky, USA to examine their potential as skid trail retirement options. While effective, current Best Management Practices (BMPs) for trail retirement do not address two potential benefits of retirement: recovery of normal hill slope\\r\\...

Ground skidding and harvested stand attributes in Appalachian hardwood stands in West Virginia

Treesearch

Andrew F. Egan; John E. Baumgras

2003-01-01

A statewide logging-in-progress study was conducted in West Virginia to examine the associations among several ground skidding and harvested stand attributes. There was a strong positive association between skidding distance and cycle time, and a significant negative relationship between the percent of trees removed in the stand and total cycle time. The number of...

19 CFR 10.41a - Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of international...

Code of Federal Regulations, 2014 CFR

2014-04-01

... for inspection by Customs officials upon reasonable notice. (3) If the container does not exit the U.S... 19 Customs Duties 1 2014-04-01 2014-04-01 false Lift vans, cargo vans, shipping tanks, skids... Traffic § 10.41a Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of...

19 CFR 10.41a - Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of international...

Code of Federal Regulations, 2012 CFR

2012-04-01

... for inspection by Customs officials upon reasonable notice. (3) If the container does not exit the U.S... 19 Customs Duties 1 2012-04-01 2012-04-01 false Lift vans, cargo vans, shipping tanks, skids... Traffic § 10.41a Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of...

19 CFR 10.41a - Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of international...

Code of Federal Regulations, 2013 CFR

2013-04-01

... for inspection by Customs officials upon reasonable notice. (3) If the container does not exit the U.S... 19 Customs Duties 1 2013-04-01 2013-04-01 false Lift vans, cargo vans, shipping tanks, skids... Traffic § 10.41a Lift vans, cargo vans, shipping tanks, skids, pallets, and similar instruments of...

Skid Prevention for EVs Based on the Emulation of Torque Reduction Characteristics of Separately-excited DC Motor

NASA Astrophysics Data System (ADS)

Kodama, Shinya; Hori, Yoichi

It is well-known that the separately-excited DC motor has effective torque (current) reduction characteristics in response to rapid increase in the rotational speed of the motor. These characteristics have been utilized in adhesion control of electric railway trains with separately-excited DC motor. Up to now, we have proposed a new skid prevention method for EVs, utilizing these characteristics and have made experiments with the hardware skid simulator “Motor-Generator setup”. In this paper, we applied this skid prevention control to our new vehicle “UOT CADWELL EV" equipped with BLDC motors and showed its effectiveness.

Streamlined Livestock Trailer

NASA Technical Reports Server (NTRS)

1980-01-01

Bull Nose livestock trailer, manufactured by American Trailer, Inc. is one of a line of highway transport vehicles manufactured by American Trailers, Inc. The slant side front end is a streamlining feature based on a NASA Research Program which investigated the aerodynamic characteristics of trailer/tractor combinations and suggested ways of reducing air resistance. Application of NASA's aerodynamic research technology to the bull nose design resulted in a 10 percent reduction in air drag, which translates into annual fuel savings of several hundred dollars.

49 CFR 1039.16 - Exemption of new highway trailers or containers.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 8 2014-10-01 2014-10-01 false Exemption of new highway trailers or containers. 1039.16 Section 1039.16 Transportation Other Regulations Relating to Transportation (Continued) SURFACE... of new highway trailers or containers. The rail transportation of new highway trailers or containers...

49 CFR 1039.16 - Exemption of new highway trailers or containers.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 8 2011-10-01 2011-10-01 false Exemption of new highway trailers or containers. 1039.16 Section 1039.16 Transportation Other Regulations Relating to Transportation (Continued) SURFACE... of new highway trailers or containers. The rail transportation of new highway trailers or containers...

49 CFR 1039.16 - Exemption of new highway trailers or containers.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 8 2013-10-01 2013-10-01 false Exemption of new highway trailers or containers. 1039.16 Section 1039.16 Transportation Other Regulations Relating to Transportation (Continued) SURFACE... of new highway trailers or containers. The rail transportation of new highway trailers or containers...

49 CFR 1039.16 - Exemption of new highway trailers or containers.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 8 2012-10-01 2012-10-01 false Exemption of new highway trailers or containers. 1039.16 Section 1039.16 Transportation Other Regulations Relating to Transportation (Continued) SURFACE... of new highway trailers or containers. The rail transportation of new highway trailers or containers...

49 CFR 1039.16 - Exemption of new highway trailers or containers.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 8 2010-10-01 2010-10-01 false Exemption of new highway trailers or containers. 1039.16 Section 1039.16 Transportation Other Regulations Relating to Transportation (Continued) SURFACE... of new highway trailers or containers. The rail transportation of new highway trailers or containers...

Quick-Fit Trailer Coupling For A Grader

NASA Technical Reports Server (NTRS)

Soper, Terry A.; Moulton, Calvin T.

1992-01-01

Ripper attachment on grading tractor adapted to lift tongue of trailer tow bar hydraulically. Unnecessary for tractor operator to use jack or fork, lift to raise tongue. Enables tractor operator, acting alone, to hitch trailer to tractor, without expense and complication of dedicated hydraulic lifting mechanism for trailer hitch.

Structural analysis of hatch cover plates on FMEF high bay mezzanine

DOE Office of Scientific and Technical Information (OSTI.GOV)

Dixson, G.E.

1997-05-29

In order to move the Idaho National Engineering Laboratory (INEL) Light Duty Utility Arm (LDUA) trailer into position for testing on the Fuels and Materials Examination Facility (FMEF) 42 ft level mezzanine one of the trailer`s wheels will have to sit on a circular hatch cover fabricated from one-inch thick steel plate. The attached calculations verify that the hatch cover plate is strong enough to support the weight of the INEL LDUA trailer`s wheel.

Cost of skid roads for arch logging in West Virginia

Treesearch

George R., Jr. Trimble; Carl R. Barr

1960-01-01

In the mountain hardwood country of the northern Appalachians, tree-length skidding with tractor and arch has proved to be economical logging. One essential part of this type of logging is that tree-length logs are winched to the skid roads: tractor and arch do not run around through the woods. Winching distance is commonly 200 to 300 feet; and occasionally an extra...

49 CFR 238.413 - End structures of trailer cars.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 4 2012-10-01 2012-10-01 false End structures of trailer cars. 238.413 Section... II Passenger Equipment § 238.413 End structures of trailer cars. (a) Except as provided in paragraph (b) of this section, the end structure of a trailer car shall be designed to include the following...

49 CFR 238.413 - End structures of trailer cars.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 4 2010-10-01 2010-10-01 false End structures of trailer cars. 238.413 Section... II Passenger Equipment § 238.413 End structures of trailer cars. (a) Except as provided in paragraph (b) of this section, the end structure of a trailer car shall be designed to include the following...

49 CFR 238.413 - End structures of trailer cars.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 4 2013-10-01 2013-10-01 false End structures of trailer cars. 238.413 Section... II Passenger Equipment § 238.413 End structures of trailer cars. (a) Except as provided in paragraph (b) of this section, the end structure of a trailer car shall be designed to include the following...

49 CFR 238.413 - End structures of trailer cars.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 4 2014-10-01 2014-10-01 false End structures of trailer cars. 238.413 Section... II Passenger Equipment § 238.413 End structures of trailer cars. (a) Except as provided in paragraph (b) of this section, the end structure of a trailer car shall be designed to include the following...

49 CFR 238.413 - End structures of trailer cars.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 4 2011-10-01 2011-10-01 false End structures of trailer cars. 238.413 Section... II Passenger Equipment § 238.413 End structures of trailer cars. (a) Except as provided in paragraph (b) of this section, the end structure of a trailer car shall be designed to include the following...

Radiometric, Spectral and Effectiveness Equipment

DTIC Science & Technology

1993-09-24

modified Contraves Kineto Tracking Mount (KTM) Model 443. The KTM is a self-contained trailer and mount. The trailer is a four wheel duel-axle bed with...measurement system also uses the Contraves (KTM) Model 433. The KTM is a self-contained trailer and mount. The trailer is a four wheel duel-axle bed with

An adaptable walking-skid for seabed ROV under strong current disturbance

NASA Astrophysics Data System (ADS)

Si, Jianting; Chin, Chengsiong

2014-09-01

This paper proposed a new concept of an adaptable multi-legged skid design for retro-fitting to a remotely-operated vehicle (ROV) during high tidal current underwater pipeline inspection. The sole reliance on propeller-driven propulsion for ROV is replaced with a proposed low cost biomimetic solution in the form of an attachable hexapod walking skid. The advantage of this adaptable walking skid is the high stability in positioning and endurances to strong current on the seabed environment. The computer simulation flow studies using Solidworks Flow Simulation shown that the skid attachment in different compensation postures caused at least four times increase in overall drag, and negative lift forces on the seabed ROV to achieve a better maneuvering and station keeping under the high current condition (from 0.5 m/s to 5.0 m/s). A graphical user interface is designed to interact with the user during robot-in-the-loop testing and kinematics simulation in the pool.

26 CFR 145.4051-1 - Imposition of tax on heavy trucks and trailers sold at retail.

Code of Federal Regulations, 2013 CFR

2013-04-01

...) Automobile truck chassis and bodies; (ii) Truck trailer and semitrailer chassis and bodies; and (iii.... A sale of an automobile truck, truck trailer or semitrailer, shall be considered to be a sale of a... is an automobile truck, truck trailer or semitrailer, or a tractor of the kind chiefly used for...

26 CFR 145.4051-1 - Imposition of tax on heavy trucks and trailers sold at retail.

Code of Federal Regulations, 2014 CFR

2014-04-01

...) Automobile truck chassis and bodies; (ii) Truck trailer and semitrailer chassis and bodies; and (iii.... A sale of an automobile truck, truck trailer or semitrailer, shall be considered to be a sale of a... is an automobile truck, truck trailer or semitrailer, or a tractor of the kind chiefly used for...

26 CFR 145.4051-1 - Imposition of tax on heavy trucks and trailers sold at retail.

Code of Federal Regulations, 2012 CFR

2012-04-01

...) Automobile truck chassis and bodies; (ii) Truck trailer and semitrailer chassis and bodies; and (iii.... A sale of an automobile truck, truck trailer or semitrailer, shall be considered to be a sale of a... is an automobile truck, truck trailer or semitrailer, or a tractor of the kind chiefly used for...

26 CFR 145.4051-1 - Imposition of tax on heavy trucks and trailers sold at retail.

Code of Federal Regulations, 2011 CFR

2011-04-01

...) Automobile truck chassis and bodies; (ii) Truck trailer and semitrailer chassis and bodies; and (iii.... A sale of an automobile truck, truck trailer or semitrailer, shall be considered to be a sale of a... is an automobile truck, truck trailer or semitrailer, or a tractor of the kind chiefly used for...

78 FR 51724 - California State Motor Vehicle Pollution Control Standards; Tractor-Trailer Greenhouse Gas...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-21

... applicable to new and in-use 53-foot and longer box-type trailers and to new and in-use tractors that haul... Tractor-Trailer GHG Regulation pertaining to new tractors (2011 through 2013 model years) and new trailers (2011 and subsequent model years). This notice announces that EPA has scheduled a public hearing...

Weaving a Virtual Story--Creating Book Trailers 101

ERIC Educational Resources Information Center

Bates, Naomi

2012-01-01

Book trailers are fast becoming today's marketing technique for newly published books. They have changed the way students select books, and trailers meet the expectations of today's teens who have been brought up on graphic visuals. Book trailers are also quite new, starting as a trend only about four years ago. Since then, they have proliferated,…

Guide To Mobile Aircraft Arresting System Installation - Air Force Handbook 10-222, Volume 8

DTIC Science & Technology

2000-03-01

38. Anchor Connection at Right Rear Wheel .................................................66 39. Store Tire Away from Runway – Right MAAS Trailer...MAAS Trailer .......68 42. Right Rear Wheel Anchor Point – Right MAAS Trailer.......................68 43. Right Rear Wheel Anchor Point Using...Rear Wheel .......................................73 47. Store Tire Away from Runway – Both MAAS Trailers ........................74 48. Left Rear

Projectile Roll Dynamics and Control With a Low-Cost Skid-to-Turn Maneuver System

DTIC Science & Technology

2013-03-01

scheme. The mechatronics of the maneuver system was provided. The suitability of this design for survival at gun launch was assessed through...Projectile Roll Dynamics and Control With a Low-Cost Skid-to-Turn Maneuver System by Frank Fresconi, Ilmars Celmins, Mark Ilg, and James...5069 ARL-TR-6363 March 2013 Projectile Roll Dynamics and Control With a Low-Cost Skid-to-Turn Maneuver System Frank Fresconi, Ilmars

Final Environmental Assessment for the Skid Strip Area Development Plan at Cape Canaveral Air Force Station Florida

DTIC Science & Technology

2009-07-01

including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215...Canaveral Air Force Station (CCAFS) Skid Strip. Since the facility no longer operates as a missile skid strip, it is referred to as the "Airfield...construction of a new 65 foot tall control tower; construction of a new Airfield Manager (AM) Operations Building that would adjoin the new tower; and

Validation of Filtration Skid During Land-Based & Shipboard Tests

DTIC Science & Technology

2012-10-12

b. ABSTRACT c. THIS PAGE 19b. TELEPHONE NUMBER (include area code) Standard Form 298 (Re . 8-98) v Prescribed by ANSI Std. Z39.18 12...skid device that it had previously developed. A prototype unit was developed and deployed on the bulk carrier M/ V Indiana Harbor, and commissioning...a preliminary design of a filter skid device that it had previously developed. A prototype unit was developed and deployed on the bulk carrier M/ V

88. VIEW OF OXIDIZER APRON ON EAST SIDE OF LSB ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

88. VIEW OF OXIDIZER APRON ON EAST SIDE OF LSB (BLDG. 751). LIQUID OXYGEN TOPPING TANK ON RIGHT; GASEOUS NITROGEN IN CENTER; LIQUID OXYGEN RAPID-LOAD TANK ON LEFT. SKID 9 ON RIGHT; SKID 7 IN CENTER; SKID 9A ON LEFT. FEATURES LEFT TO RIGHT IN BACKGROUND: LAUNCH DECK, UMBILICAL MAST, MST, AND NORTH CAMERA TOWER. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Cigarette smoking and perception of a movie character in a film trailer.

PubMed

Hanewinkel, Reiner

2009-01-01

To study the effects of smoking in a film trailer. Experimental study. Ten secondary schools in Northern Germany. A sample of 1051 adolescents with a mean (SD) age of 14.2 (1.8) years. Main Exposures Participants were randomized to view a 42-second film trailer in which the attractive female character either smoked for about 3 seconds or did not smoke. Perception of the character was measured via an 8-item semantic differential scale. Each item consisted of a polar-opposite pair (eg, "sexy/unsexy") divided on a 7-point scale. Responses to individual items were summed and averaged. This scale was named "attractiveness." The Cronbach alpha for the attractiveness rating was 0.85. Multilevel mixed-effects linear regression was used to test the effect of smoking in a film trailer. Smoking in the film trailer did not reach significance in the linear regression model (z = 0.73; P = .47). Smoking status of the recipient (z = 3.81; P < .001) and the interaction between smoking in the film trailer and smoking status of the recipient (z = 2.21; P = .03) both reached statistical significance. Ever smokers and never smokers did not differ in their perception of the female character in the nonsmoking film trailer. In the smoking film trailer, ever smokers judged the character significantly more attractive than never smokers. Even incidental smoking in a very short film trailer might strengthen the attractiveness of smokers in youth who have already tried their first cigarettes.

Vertical Drop Testing and Analysis of the Wasp Helicopter Skid Gear

NASA Technical Reports Server (NTRS)

Jackson, Karen E.; Fuchs, Yvonne T.

2007-01-01

This report describes an experimental program to assess the impact performance of a skid gear for use on the Wasp kit-built helicopter, which is marketed by HeloWerks, Inc. of Hampton, Virginia. In total, five vertical drop tests were performed. The test article consisted of a skid gear mounted beneath a steel plate. A seating platform was attached to the upper surface of the steel plate, and two 95th percentile Hybrid III male Anthropomorphic Test Devices (ATDs) were seated on the platform and secured using a four-point restraint system. The test article also included ballast weights to ensure the correct position of the Center-of-Gravity (CG). Twenty-six channels of acceleration data were collected per test at 50,000 samples per second. The five drop tests were conducted on two different gear configurations. The details of these test programs are presented, as well as an occupant injury assessment. Finally, a finite element model of the skid gear test article was developed for execution in LS-DYNA, an explicit nonlinear transient dynamic code, for predicting the skid gear and occupant dynamic responses due to impact.

LANL Skid Testing Summary

DOE Office of Scientific and Technical Information (OSTI.GOV)

Dickson, Peter

2014-04-09

Our improved understanding of the processes occurring during complex drop / skid events has explained the previously observed scatter in skid and drop test data, and provided new insights into effective mitigation strategies. However, it has been perceived to undermine our current safety assumptions, which is inaccurate. We have no reason to believe that our safety margin from HEVR (the event of concern) is any different to that previously assumed – we just have a much better experimental and theoretical basis by which to measure it more accurately. Until this work is complete or, at least, more mature, we cannotmore » draw any conclusions on whether we are more or less safe than we thought, but we know that use of cushioned surfaces, along with sensible housekeeping, mitigates the potential activation of the skid-grit mechanism.« less

ETF Facility evaporator skid orifice sizing design analysis

DOE Office of Scientific and Technical Information (OSTI.GOV)

ELLINGSON, S.D.

1999-08-31

This document releases and records the design analysis for sizing the Orifice plate being installed on the Effluent Treatment Facility (ETF) evaporator skid per Engineering Change Notice (ECN) 651583.

Skid correction program : user's manual.

DOT National Transportation Integrated Search

2012-06-01

This document outlines methods for use by UDOT personnel to address pavements with unacceptable skid numbers. The program involves coordination between Safety, Pavement Management, Region, and Maintenance managers. A process has been recommended usin...

Design of bituminous mixes with high skid resistance.

DOT National Transportation Integrated Search

1979-01-01

Certain highway locations need exceptionally high skid resistance because of the alignment, geometry, and drainage of the roadway and the complex turning maneuvers required. Several beam specimens made of bituminous mixes incorporating unconventional...

Full-Tree Skidding Favors Black Spruce Reproduction Under Certain Peatland Conditions

Treesearch

William F. Johnston

1980-01-01

Two trials on different sites indicate that clearcut black spruce reproduces well after full-tree skidding only on nonbrushy sites that have fairly abundant sphagnum seedbeds and adequate natural seeding.

Methodology for utilizing survey skid data.

DOT National Transportation Integrated Search

1975-01-01

This report sets forth procedures for utilizing survey skid data with consideration given to testing variabilities and relationships between the three testing devices used in Virginia namely, the Virginia Department of Highways & Transportation's tra...

Blended aggregate bituminous mixes.

DOT National Transportation Integrated Search

1975-01-01

Virginia has provided skid resistant pavements in the limestone area of the state by placing thin overlays of sand mixes incorporating local materials, by sprinkling highly skid resistant aggregates on limestone bituminous mixes prior to rolling, and...

Truck accident and fatality rates calculated from California highway accident statistics for 1980 and 1981

DOE Office of Scientific and Technical Information (OSTI.GOV)

Smith, R.N.; Wilmot, E.L.

California state highway accident rates for three types of truck vehicles (pickup, truck without trailer, and truck with trailer) were analyzed for 1980 and 1981 and for various road types in each of eleven state highway districts. Accident rates have not been available previously that are specific to truck vehicles, particularly truck with trailer. Reported data are presented that lead to several significant observations about truck accident rates: pickup truck accident rates are about twice the composite rates for all vehicle types; the fatality rates for trucks with trailer are nearly twice that for all vehicle types; fatality rates formore » trucks (without trailer) are comparable to the composite rates; and total accident and fatal-plus-injury rates for trucks with trailer are close to the composite rates in urban areas but higher in rural areas. The values for average total accident rates reported in 1981 are: 2.2 accidents per million vehicle miles (mvm) for pickups, 1.5 accidents per mvm for trucks, and 1.4 accidents per mvm for trucks with trailer. The values for average fatality rates reported in 1981 are: 3.8 fatalities per 100 mvm for pickups, 2.8 fatalities per 100 mvm for trucks, and 4.3 fatalities per 100 mvm for trucks with trailer. The reported rates for 1980 are approximately the same.« less

Trailer siting issues: BP Texas City.

PubMed

Kaszniak, Mark; Holmstrom, Donald

2008-11-15

On 23 March, 2005, a series of explosions and fires occurred at the BP Texas City refinery during the startup of an isomerization (ISOM) process unit. Fifteen workers were killed and about 180 others were injured. All of the fatalities were contract workers; the deaths and most of the serious injuries occurred in and around temporary office trailers that had been sited near a blowdown drum and stack open to the atmosphere as part of ongoing turnaround activities in an adjacent unit. Due to problems that developed during the ISOM startup, flammable hydrocarbon liquid overfilled the blowdown drum and stack which resulted in a geyser-like release out the top into the atmosphere. The flammable hydrocarbons fell to the ground releasing vapors that were likely ignited from a nearby idling diesel pickup truck. A total of 44 trailers were damaged by the blast pressure wave that propagated through the refinery when the vapor cloud exploded. Thirteen trailers were totally destroyed and workers were injured in trailers as far as 479ft away from the release. The focus of this paper will be on trailer siting issues, including: need for work/office trailers within process units, adequacy of risk analysis methods in API RP 752, and minimum safe distance requirements

Recovery of residue tops in selectively cut northern hardwood stands.

Treesearch

James A. Johnson; Rodger A. Arola; Edwin S. Miyata

1982-01-01

Tests the feasibility and economics of compacting hardwood tops with a prototype shearing and bunching device prior to skidding. Presents productivity levels and costs associated with compacting, skidding, and chipping hardwood tops.

49 CFR 571.224 - Standard No. 224; Rear impact protection.

Code of Federal Regulations, 2010 CFR

2010-10-01

... trailers, pulpwood trailers, road construction controlled horizontal discharge trailers, special purpose... latches are excluded from the determination of the rearmost point. Road construction controlled horizontal... machine or paving equipment for road construction and paving operations. Rounded corner means a guard's...

Lunar surface operations. Volume 4: Lunar rover trailer

NASA Technical Reports Server (NTRS)

Shields, William; Feteih, Salah; Hollis, Patrick

1993-01-01

The purpose of the project was to design a lunar rover trailer for exploration missions. The trailer was designed to carry cargo such as lunar geological samples, mining equipment and personnel. It is designed to operate in both day and night lunar environments. It is also designed to operate with a maximum load of 7000 kilograms. The trailer has a ground clearance of 1.0 meters and can travel over obstacles 0.75 meters high at an incline of 45 degrees. It can be transported to the moon fully assembled using any heavy lift vehicle with a storage compartment diameter of 5.0 meters. The trailer has been designed to meet or exceed the performance of any perceivable lunar vehicle.

Body position and direction preferences in horses during road transport.

PubMed

Smith, B L; Jones, J H; Carlson, G P; Pascoe, J R

1994-09-01

It has been hypothesised that horses have a preference for facing backward in a trailer during road transport in order to minimise shifts of body weight due to accelerations and decelerations. To determine if horses have preferences for facing forward vs. backward in a horse trailer, the authors analysed the percentages of time horses spent in different body positions and directions while standing in a moving or parked horse trailer. Body positions and directions of 8 Thoroughbred geldings were videotaped while horses were transported singly and untethered in a 4-horse stock trailer over a 32 km route of country roads; or while the same horses were untethered in the same trailer stationary in a parking lot. Analysis of the logit-transformed percentages of time horses spent in different directions indicated that they spent significantly more time facing backward when the trailer was in motion, but not when it was parked. Several horses displayed strong individual preferences for the directions they faced during road transport.

Design of bituminous surface mixes with high skid resistance.

DOT National Transportation Integrated Search

1974-01-01

The Virginia Highway Research Council has proposed a study of the skid resistance of bituminous surfaces incorporating relatively hard and expensive aggregates. The hardness of the aggregates to be used aluminum oxide (Exolon) and calcined kaolin -- ...

Orbiter post-tire failure and skid testing results

NASA Technical Reports Server (NTRS)

Daugherty, Robert H.; Stubbs, Sandy M.

1989-01-01

An investigation was conducted at the NASA Langley Research Center's Aircraft Landing Dynamics Facility (ALDF) to define the post-tire failure drag characteristics of the Space Shuttle Orbiter main tire and wheel assembly. Skid tests on various materials were also conducted to define their friction and wear rate characteristics under higher speed and bearing pressures than any previous tests. The skid tests were conducted to support a feasibility study of adding a skid to the orbiter strut between the main tires to protect an intact tire from failure due to overload should one of the tires fail. Roll-on-rim tests were conducted to define the ability of a standard and a modified orbiter main wheel to roll without a tire. Results of the investigation are combined into a generic model of strut drag versus time under failure conditions for inclusion into rollout simulators used to train the shuttle astronauts.

Development of an electric, battery powered, skid-steer loader

DOE Office of Scientific and Technical Information (OSTI.GOV)

Alcock, R.; Froehlich, D.P.; Christianson, L.L.

1985-01-01

A battery powered, skid-steer loader was developed for farm chore routines and materials handling activities. Outlined are details on drive train, hydraulics, loader, frame, cab, controls, battery and controller. Preliminary performance characteristics of the hydraulics are presented.

49 CFR 571.7 - Applicability.

Code of Federal Regulations, 2014 CFR

2014-10-01

..., and sold directly to, the Armed Forces of the United States in conformity with contractual... a new cab is used in the assembly of a truck, the truck will be considered newly manufactured for... components in trailer manufacture. When new materials are used in the assembly of a trailer, the trailer will...

49 CFR 571.7 - Applicability.

Code of Federal Regulations, 2010 CFR

2010-10-01

..., and sold directly to, the Armed Forces of the United States in conformity with contractual... a new cab is used in the assembly of a truck, the truck will be considered newly manufactured for... components in trailer manufacture. When new materials are used in the assembly of a trailer, the trailer will...

49 CFR 571.7 - Applicability.

Code of Federal Regulations, 2012 CFR

2012-10-01

..., and sold directly to, the Armed Forces of the United States in conformity with contractual... a new cab is used in the assembly of a truck, the truck will be considered newly manufactured for... components in trailer manufacture. When new materials are used in the assembly of a trailer, the trailer will...

49 CFR 571.7 - Applicability.

Code of Federal Regulations, 2013 CFR

2013-10-01

..., and sold directly to, the Armed Forces of the United States in conformity with contractual... a new cab is used in the assembly of a truck, the truck will be considered newly manufactured for... components in trailer manufacture. When new materials are used in the assembly of a trailer, the trailer will...

49 CFR 571.7 - Applicability.

Code of Federal Regulations, 2011 CFR

2011-10-01

..., and sold directly to, the Armed Forces of the United States in conformity with contractual... a new cab is used in the assembly of a truck, the truck will be considered newly manufactured for... components in trailer manufacture. When new materials are used in the assembly of a trailer, the trailer will...

Environmental Assessment: BRAC Construction and Operation of Armed Forces Reserve Center at Malmstrom Air Force Base, Great Falls, Montana

DTIC Science & Technology

2009-06-01

Day-Night Levels in Urban Areas in the United States .................................4-31 4-5 Typical Construction Equipment and Composite Site...ramp 2 Reefer 4 1.5-ton Trailer 1 2.5-ton Trailer 1 5-ton Trailer 4 Mobile Kitchen Trailer 1 4-kilovolt (kV) Generator sets 3 10-kV generator...encountered in urban areas of the U.S. In general, 30 to 50 dB represents a quiet classification, 65 to 70 dB represents a moderately noisy

Installation report on porous friction course hot plant mix.

DOT National Transportation Integrated Search

1972-01-01

An investigation was initiated in the spring of 1972 to develop surface mixes with high skid resistance for use at special locations. The porous friction course will hopefully provide high skid coefficients where water drainage and hydroplaning may b...

An evaluation of the NCSA hydrochloric acid leaching procedure.

DOT National Transportation Integrated Search

1970-02-01

In the past several years the National Crushed stone Association : has been conducting a research study into the skid resistance of carbonate : aggregate. The aim of the study has been the establishment of a relationship : between the skid resistance...

100. INTERIOR OF SKID 9A: VENT VALVE AND RELIEF VALVE ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

100. INTERIOR OF SKID 9A: VENT VALVE AND RELIEF VALVE FOR RAPID-LOAD LIQUID OXYGEN TANK - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Skidder load capacity and fuel consumption HP-41C program

Treesearch

Ross A. Phillips

1983-01-01

This program gives the log weight that the skidder can move and gives fuel consumption either in liters or gallons per turn. Slope of the skid trail, skidder weight, and skid distance must be entered into the program.

49 CFR 571.121 - Standard No. 121; Air brake systems.

Code of Federal Regulations, 2011 CFR

2011-10-01

.... Agricultural commodity trailer means a trailer that is designed to transport bulk agricultural commodities in... response to those signals. Auto transporter means a truck and a trailer designed for use in combination to transport motor vehicles, in that the towing vehicle is designed to carry cargo at a location other than the...

77 FR 31423 - Qualification of Drivers; Application for Exemptions; National Association of the Deaf

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-25

... dump trucks and tractor trailer trucks. He would like to drive tractor trailer trucks in interstate... CDL and drive heavy equipment such as a dump truck, or rig truck with a trailer, if granted an... intrastate commerce. This includes experience driving heavy equipment, dump trucks and public works trucks...

26 CFR 48.4052-1 - Heavy trucks and trailers; certification requirement.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 16 2010-04-01 2010-04-01 true Heavy trucks and trailers; certification requirement. 48.4052-1 Section 48.4052-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY..., Tread Rubber, and Taxable Fuel Automotive and Related Items § 48.4052-1 Heavy trucks and trailers...

Non-contact skid resistance measurement : final report, December 2009.

DOT National Transportation Integrated Search

2009-12-01

In this research, a correlation between the SN40R collected by locked wheel skid tester and the : texture data or Mean Profile Depth (MPD) collected by a vehicle mounted laser operating at highway : speeds was developed. The proposed correlation betw...

Wet weather highway accident analysis and skid resistance data management system (volume I).

DOT National Transportation Integrated Search

1992-06-01

The objectives and scope of this research are to establish an effective methodology for wet weather accident analysis and to develop a database management system to facilitate information processing and storage for the accident analysis process, skid...

An evaluation of disinfectants for the sanitation of porcine reproductive and respiratory syndrome virus-contaminated transport vehicles at cold temperatures

PubMed Central

2005-01-01

Abstract The objective of this study was to evaluate the efficacy of commercially available disinfectants to sanitize porcine reproductive and respiratory syndrome virus (PRRSV) contaminated trailer models in cold climates (−20°C and 4°C). Disinfectants evaluated included Synergize, Aseptol 2000, Biophene, Sentramax, Virkon, Tek Trol, and DC&R. All products were applied to trailers via fumigation at 4°C. Following experimental contamination of model trailers with PRRSV MN 30-100 (5 × 105 TCID50), models were tested for the presence or absence of PRRSV-RNA by polymerase chain reaction (PCR) on swabs collected 0, 30, and 60 min after treatment. Treatments included washing only, washing plus disinfectant fumigation, washing plus fumigation, and washing plus overnight drying. The PRRSV-RNA detected across trailers ranged from 0/12 replicates in trailers treated with Synergize or allowed to dry for 8 h. These trailers were also negative for the presence of infectious PRRSV, based on the lack of sentinel pig infection (0/4 replicates). In contrast, the detection of PRRSV-positive swabs by PCR ranged from 3/12 (Aseptol) to 10/12 (Biophene). Based on these results, the efficacy of Synergize was evaluated at −20°C. In an attempt to reduce the impact of freezing on disinfectant activity, 30 mL of disinfectant was added to a 3840 mL of a 40% methanol solution, a 10% propylene glycol (PG) solution, or water alone. The PRRSV-contaminated trailers were treated with 1 of 3 disinfectant mixtures via fumigation, stored for 8 h at −20°C, allowed to thaw, and sampled as described. Trailers treated with 40% methanol or 10% PG did not freeze and were negative for PRRSV-RNA and infectious virus following thawing. In contrast, trailers treated with disinfectant and water were frozen within 60 min at −20°C, and decontamination was not successful. PMID:15745225

Low-drag ground vehicle particularly suited for use in safely transporting livestock

NASA Technical Reports Server (NTRS)

Saltzman, E. J. (Inventor)

1982-01-01

A low-drag truck consisting of a tractor-trailer rig characterized by a rounded forebody and a protective fairing for the gap conventionally found to exist between the tractor and the trailer is described. The fairing particularly suited for establishing an attached flow of ambient air along its surfaces. The truck is also comprised of a forward facing, ram air inlet and duct and a plurality of submerged inlets and outflow ports communicating with the trailer for continuously flushing heated gases from the trailer as the rig is propelled at highway speeds.

Effects of trailer design on animal welfare parameters and carcass and meat quality of three Pietrain crosses being transported over a long distance.

PubMed

Weschenfelder, A V; Torrey, S; Devillers, N; Crowe, T; Bassols, A; Saco, Y; Piñeiro, M; Saucier, L; Faucitano, L

2012-09-01

This study aimed at evaluating the effects of trailer design on stress responses and meat quality traits of 3 different pig crosses: 50% Pietrain breeding with halothane (HAL)(Nn) (50Nn); 50% Pietrain breeding with HAL(NN) (50NN); and 25% Pietrain breeding with HAL(NN) genotype (25NN). Over a 6-wk period, pigs (120 pigs/crossbreed) were transported for 7 h in either a pot-belly (PB) or flat-deck (FD) trailer (10 pigs/crossbreed(-1)·trailer(-1)·wk(-1)). Temperature (T) and relative humidity (RH) were monitored in each trailer. Behaviors during loading and unloading, time to load and unload, and latency to rest in lairage were recorded, whereas a sub-population of pigs (4 pigs/crossbreed(-1)·trailer(-1)·wk(-1)) was equipped with gastro-intestinal tract (GIT) temperature monitors. Blood samples were collected at exsanguination for measurement of cortisol, creatine kinase (CK), lactate, haptoglobin, and Pig-MAP concentrations. Meat quality data were collected at 24 h postmortem from the LM and semimembranosus (SM) and adductor (AD) muscles of all 360 pigs. Greater T were recorded in the PB trailer during transportation (P = 0.006) and unloading (P < 0.001). Delta GIT temperature was greater (P = 0.01) in pigs unloaded from the PB. At loading, pigs tended to move backwards more (P = 0.06) when loaded on the FD than the PB trailer. At unloading, an interaction was found between trailer type and crossbreed type, with a greater (P < 0.01) frequency of overlaps in 50NN and 25NN pigs and slips/falls in 50Nn and 50NN pigs from the FD than the PB trailer. Cortisol concentrations at slaughter were greater (P = 0.02) in pigs transported in the PB than FD trailer. Greater lactate concentrations were found in 50Nn and 50NN pigs (P = 0.003) and greater CK concentrations (P < 0.001) in 50Nn pigs. As expected, 50Nn pigs produced leaner (P < 0.001) carcasses, with greater (P = 0.01) dressing percentages, as well as lower (P < 0.001) ultimate pH values and greater (P < 0.001) drip loss percentages in the LM and greater (P = 0.002) drip losses and a paler color (greater L* values, P = 0.02) in the SM than 50NN pigs. When used for long distance transportation under controlled conditions, the PB trailer produced no detrimental effects on animal welfare or pork quality. Pigs with 50% Pietrain crossbreeding appear to be more responsive to transport stress, having the potential to produce acceptable carcass and pork quality, provided pigs are free of the HAL gene.

Commercial Grade Item (CGI) Dedication for Leak Detection Relays

DOE Office of Scientific and Technical Information (OSTI.GOV)

KOCH, M.R.; JOHNS, B.R.

1999-12-21

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping and Instrumentation Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

Commercial Grade Item (CGI) Dedication for Leak Detection Relays

DOE Office of Scientific and Technical Information (OSTI.GOV)

KOCH, M.R.

2000-02-28

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping Instrumentation and Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

Commercial Grade Item (CGI) Dedication for Leak Detection Relays

DOE Office of Scientific and Technical Information (OSTI.GOV)

KOCH, M.R.

1999-08-11

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping and Instrumentation Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

Commercial Grade Item (CGI) Dedication for Leak Detection Relays

DOE Office of Scientific and Technical Information (OSTI.GOV)

JOHNS, B.R.

1999-05-05

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping and Instrumentation Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

Commercial Grade Item (CGI) Dedication for Leak Detection Relays

DOE Office of Scientific and Technical Information (OSTI.GOV)

KOCH, M.R.

1999-10-26

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping and Instrumentation Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

Commercial Grade Item (CGI) Dedication for Leak Detection Relays

DOE Office of Scientific and Technical Information (OSTI.GOV)

JOHNS, B.R.; KOCH, M.R.

2000-01-28

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping Instrumentation and Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

Wet weather highway accident analysis and skid resistance data management system (volume II : user's manual).

DOT National Transportation Integrated Search

1992-06-01

The objectives and scope of this research are to establish an effective methodology for wet weather accident analysis and to develop a database management system to facilitate information processing and storage for the accident analysis process, skid...

146. FUEL LINE TO SKID 2 (FUEL LOADER) IN FUEL ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

146. FUEL LINE TO SKID 2 (FUEL LOADER) IN FUEL CONTROL ROOM (215), LSB (BLDG. 751). LIQUID NITROGEN/HELIUM HEAT EXCHANGER ON RIGHT. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

82. GENERAL VIEW FROM NORTH OF FUEL STORAGE AND TRANSFER ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

82. GENERAL VIEW FROM NORTH OF FUEL STORAGE AND TRANSFER CONTROL SKID (SKID 2) ON SOUTH END OF SLC-3W FUEL APRON - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Durability of certain configurations for providing skid resistance on concrete pavements.

DOT National Transportation Integrated Search

1974-01-01

The main objective of this study was to establish the factors that influence the durability of the surface configurations that are used or can be used to provide high and long lasting skid resistance for portland cement concrete pavements. In the dev...

An assessment of the skid resistance effect on traffic safety under wet-pavement conditions.

PubMed

Pardillo Mayora, José M; Jurado Piña, Rafael

2009-07-01

Pavement-tire friction provides the grip that is required for maintaining vehicle control and for stopping in emergency situations. Statistically significant negative correlations of skid resistance values and wet-pavement accident rates have been found in previous research. Skid resistance measured with SCRIM and crash data from over 1750km of two-lane rural roads in the Spanish National Road System were analyzed to determine the influence of pavement conditions on safety and to assess the effects of improving pavement friction on safety. Both wet- and dry-pavement crash rates presented a decreasing trend as skid resistance values increased. Thresholds in SCRIM coefficient values associated with significant decreases in wet-pavement crash rates were determined. Pavement friction improvement schemes were found to yield significant reductions in wet-pavement crash rates averaging 68%. The results confirm the importance of maintaining adequate levels of pavement friction to safeguard traffic safety as well as the potential of pavement friction improvement schemes to achieve significant crash reductions.

The Short Readings Project: A CALL Reading Activity Utilizing Vocabulary Recycling

ERIC Educational Resources Information Center

Johnson, Andrew; Heffernan, Neil

2006-01-01

In 2003 multimedia-based English Trailers (www.english-trailers.com) joined the vast array of web sites dedicated to language learning enabling students, either autonomously or in a CALL classroom, to study English via movie commercials. To assist students in comprehending 10 trailers found on the site, the authors created the Short Readings…

Highway pavement performance test for colored thin anti-skidding layers

NASA Astrophysics Data System (ADS)

Gao, Wei; Cui, Wei; Xu, Ming

2018-03-01

Based on the actual service condition of highway pavement colored thin anti-skidding layers, with materials of color quartz sand and two-component acrylic resin as basis, we designed such tests as the bond strength, shearing strength, tear strength, fatigue performance and aggregate polished value, and included the freeze-thaw cycle and de-icing salt and other factors in the experiment, connecting with the climate characteristics of circumpolar latitude and low altitude in Heilongjiang province. Through the pavement performance test, it is confirmed that the colored thin anti-skidding layers can adapt to cold and humid climate conditions, and its physical mechanical properties are good.

The contribution of micro- and macro-texture to the skid resistance of flexible pavement.

DOT National Transportation Integrated Search

2016-02-01

Skid resistance is an important characteristic of the pavement surface to reduce the number of road accidents. The : mechanisms involved in the activation of the frictional force required for a safe braking of the vehicle depend on both : the macro- ...

Grounding and Shielding Requirements for the Radiation and EMP Environments of an Underground Nuclear Test

DTIC Science & Technology

1978-03-17

the trailers as Electro-magnetic Interference ( EMI ) tight as possible; such items included removal of all unnecessary wiring penetrations, conductive...20 12. CABLE TRAYS, GROUT-FILLED ............ .................. 21 13. THE MESA TRAILER PARK CONSIDERATIONS...enclosed cable shields. 12. The mesa trailer park received some attention regarding the GSP, although not as intense as the tunnel environment. Specifically

Trailer temperature and humidity during winter transport of cattle in Canada and evaluation of indicators used to assess the welfare of cull beef cows before and after transport.

PubMed

Goldhawk, C; Janzen, E; González, L A; Crowe, T; Kastelic, J; Kehler, C; Siemens, M; Ominski, K; Pajor, E; Schwartzkopf-Genswein, K S

2015-07-01

The current study evaluated 17 loads of cull beef cows transported in Canadian winter conditions to assess in-transit temperature and humidity, evaluation of events during loading and unloading, and animal condition and bruising. Regardless of the use of boards to block ventilation holes in trailers, temperatures were higher within trailers than at ambient locations during both travel and stationary periods (P < 0.01). Boarding was associated with smaller differences in trailer temperature, compared with ambient conditions, while the trailer was traveling at highway speeds versus when trailers were stationary (P < 0.01). Moisture levels within trailers were not different from ambient conditions when loads using boarding were traveling (P < 0.01), whereas loads without boarding had a larger difference (P < 0.01). The moisture within trailers relative to ambient conditions increased when trailers were stationary compared with traveling when boarding was used (P < 0.01). The majority of cattle transported were in good body condition (97.4% within BCS of 2 to 3.5) and had calm temperaments (96.7%). Although all comparisons were made, only the doghouse compartment had an increased risk of severe bruising compared with all other compartments (odds ratio [95% confidence interval]: 3.0 [1.6–5.5], 3.7 [2.1–6.4], 2.2 [1.3–3.7] and 3.8 [1.5–9.6] in comparison with the back, belly, deck, and nose compartments, respectively; P < 0.05). Increasing the duration of waiting to unload 30 min relative to a 1 h duration increased the odds of severe bruising by 1.18 times (95% confidence interval: 1.09–1.29; P < 0.01). Scoring systems that have been developed for auditing unloading of cattle had limited variation across loads at both loading and unloading. Pretransport assessment of animal condition using the American Meat Institute’s compromised animal score was the only scoring system that was consistent with posttransport scores. We inferred from the temperature and humidity data in the current study that under commercial conditions, boarding may increase ventilation within trailers during travel and decrease ventilation during stationary periods. The current study provides the first indication that issues in Canadian cull cow transport may be related to pretransport animal condition and management of unloading.

Pyrogasification of blended animal manures to produce combustable gas and biochar

USDA-ARS?s Scientific Manuscript database

The objective of this study is to evaluate the efficiency of a skid-mounted pyrogasificaiton system for producing combustible gas from from animal manures: chicken litter, swine solids, and swine solids blended with rye grass. The skid-mounted pyrolysis system by the US Innovation Group, Inc. (USIG,...

149. SOUTHEAST CORNER OF FUEL CONTROL ROOM (215), LSB (BLDG. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

149. SOUTHEAST CORNER OF FUEL CONTROL ROOM (215), LSB (BLDG. 751), WITH SKID 2 IN FOREGROUND; FUEL LINE TO LAUNCH VEHICLE ENTERING WALL ON LEFT BEHIND SKID 2 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

49 CFR Figure 3 to Subpart E of... - Trailer Car End Structure Conceptual Implementation 1-to Subpart E

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 4 2010-10-01 2010-10-01 false Trailer Car End Structure Conceptual Implementation 1-to Subpart E 3 Figure 3 to Subpart E of Part 238 Transportation Other Regulations Relating to... to Subpart E of Part 238—Trailer Car End Structure Conceptual Implementation 1—to Subpart E ER12MY99...

49 CFR Figure 3 to Subpart E of... - Trailer Car End Structure Conceptual Implementation 1-to Subpart E

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 4 2014-10-01 2014-10-01 false Trailer Car End Structure Conceptual Implementation 1-to Subpart E 3 Figure 3 to Subpart E of Part 238 Transportation Other Regulations Relating to... to Subpart E of Part 238—Trailer Car End Structure Conceptual Implementation 1—to Subpart E ER12MY99...

Service Test of the Airfield Specialized Trailer System

DTIC Science & Technology

1966-10-31

universal trailer is a lightweight, air-transportable, four- wheel trailer. It is capable of transferring loads to compatible main- tenance and storage...transverse beams). The suspension sys- tem is a specially designed, three-point system which protects loads from excessive wheel displacement when...lightweight steel and can accommodate hoist and lift facilities. Sockets are provided to permit attachment of several accessory kits (running gear caster

NASA diagonal-braked test vehicle evaluation of traction characteristics of grooved and ungrooved runway surfaces at Miami International Airport, Miami, Florida, 8-9 May 1973

NASA Technical Reports Server (NTRS)

Horne, W. B.

1977-01-01

Two runways were evaluated under artificially wetted conditions with the NASA diagonal-braked vehicle (DBV). Results of the evaluation which included a pavement drainage analysis, a pavement skid resistance analysis, and a DBV wet/dry stopping distance ratio analysis indicated that the ungrooved runway surfaces had poor water drainage characteristics and poor skid resistance under wet conditions at high speeds especially in rubbercoated areas of the runways. Grooving runways to a transverse 1-1/4 x 1/4 x 1/4 inch pattern greatly improved both the water drainage and pavement skid resistance capability of these asphaltic concrete surfaces.

An evaluation of the effects of tread depth, pavement texture, and water film thickness on skid number-speed gradients : supplement.

DOT National Transportation Integrated Search

1975-03-01

The raw data and the initial curves for the study entitled, "An Evaluation of the Effects of Tread Depth, Pavement Texture, and Water Film Thickness on Skid Number-Speed Gradients" are so voluminous that they are included in the Supplement rather tha...

77 FR 21662 - Amendment of Class D Airspace; Cocoa Beach, FL

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-11

...-0099; Airspace Docket No. 12-ASO-11] Amendment of Class D Airspace; Cocoa Beach, FL AGENCY: Federal... Class D airspace at Cape Canaveral Skid Strip, Cocoa Beach, FL, by correcting the geographic coordinates... of Cape Canaveral Skid Strip, Cocoa Beach, FL. Also, the geographic coordinates for the airport need...

Soil response to skidder trafficking and slash application

Treesearch

Brian M. Parkhurst; W. Michael Aust; M. Chad Bolding; Scott M. Barrett; Emily A. Carter

2018-01-01

Ground-based timber harvesting systems are common in the United States. Harvesting machinery can negatively influence soils by increasing erosion and decreasing site productivity. Skid trails can become compacted and erosive. Slash applications to skid trails are effective for erosion control, yet few investigations have examined effects of slash on soil physical...

Function investigation of stone mastic asphalt (SMA) mixture partly containing basic oxygen furnace (BOF) slag.

PubMed

Chen, Zongwu; Wu, Shaopeng; Pang, Ling; Xie, Jun

2016-07-04

In this paper, the effect of the size gradations of basic oxygen furnace (BOF) slag on the functional performances of stone mastic asphalt (SMA) mixture including skid and deformation resistances was investigated. The industrially produced BOF slag coarse aggregates (BSCA) with size gradations of 4.75-9.5 mm and 9.5-16 mm were used. SMA mixtures were designed according to Marshall procedure. British pendulum number (BPN), indicating the skid resistance of asphalt mixture, was measured by a British pendulum skid resistance device. Flow number (FN) and Marshall quotient (MQ), reflecting the deformation resistance of asphalt mixture, were determined, respectively, based on the results of dynamic creep test and Marshall test (stability and flow value). Showed that BSCA with a size gradation of 9.5-16 mm performed better in improving the skid and deformation resistance of SMA mixture than BSCA with a size gradation of 4.75-9.5 mm. Furthermore, BSCA with combined size gradations, namely, 4.75-16 mm, worked the best. These conclusions would benefit the future extensive utilization of BSCA in asphalt pavement.

3-D Transient Heat Transfer Analysis of Slab Heating Characteristics in a Reheating Furnace in Hot Strip Mills

NASA Astrophysics Data System (ADS)

Jang, J. Y.; Lee, Y. W.; Lin, C. N.; Wang, C. H.

2016-05-01

A three-dimensional mathematical transient heat transfer model for the prediction of temperature distribution within the slab has been developed by considering the thermal radiation in the walking-beam-type reheating furnace chamber. The steel slabs are heated up through the non-firing, preheating, 1st-heating, 2nd-heating, and soaking zones in the furnace, respectively, where the furnace wall temperature is function of time. Comparison with the in-situ experimental data from Steel Company in Taiwan shows that the present heat transfer model works well for the prediction of thermal behavior of the slab in the reheating furnace. The effects of different skid button height (H=60mm, 90mm, and 120mm) and different gap distance between two slabs (S=50mm, 75mm, and 100mm) on the slab skid mark formation and temperature profiles are investigated. It is found that the skid mark severity decreases with an increase in the skid button height. The effect of gap distance is important only for the slab edge planes, while it is insignificant for the slab central planes.

Fleet Evaluation and Factory Installation of Aerodynamic Heavy Duty Truck Trailers

DOE Office of Scientific and Technical Information (OSTI.GOV)

Beck, Jason; Salari, Kambiz; Ortega, Jason

2013-09-30

The purpose of DE-EE0001552 was to develop and deploy a combination of trailer aerodynamic devices and low rolling resistance tires that reduce fuel consumption of a class 8 heavy duty tractor-trailer combination vehicle by 15%. There were 3 phases of the project: Phase 1 – Perform SAE Typed 2 track tests with multiple device combinations. Phase 2 – Conduct a fleet evaluation with selected device combination. Phase 3 – Develop the devices required to manufacture the aerodynamic trailer. All 3 phases have been completed. There is an abundance of available trailer devices on the market, and fleets and owner operatorsmore » have awareness of them and are purchasing them. The products developed in conjunction with this project are at least in their second round of refinement. The fleet test undertaken showed an improvement of 5.5 – 7.8% fuel economy with the devices (This does not include tire contribution).« less

Assessing the Adequacy of the Industrial Base

DTIC Science & Technology

1992-05-01

OPERATION DESERT SHIELD Production information items Tactical and support vehides Heavy Expanded Mobility Tactical Truck (HEMTT) M936A2 wrecker Trailer ...heaters’ Ballistic-Laser Protective Spectacles (BLPS)a Location of water Desert camouflage nets Desert camouflage helmet covers MSS laundry, trailer ...wind, and dust goggles (app. for acceleration) Pallatibility of T-Rations Bodybags Floodlight set, trailer mounted’ M702 6,000 Btu and M894 18,000

The Environmental Assessment and Management (TEAM) Guide: South Dakota Supplement

DTIC Science & Technology

2010-02-01

Nonpermanent Bulk Pesticide Storage Containers - mobile containers positioned on or part of movable equipment, such as trucks, trailers , and tank cars...Storage Containers - containers which are not positioned on or a part of movable equipment, such as trucks, trailers , and tank cars (SDAR 12:56:01:01...premises such as houses, trailer courts, commercial buildings, and institutions (SDAR 74:53:01:01) [Citation Revised April 1998]. • Domestic Water

41 CFR 302-7.20 - If my HHG shipment includes an item (e.g., boat, trailer, ultralight vehicle) for which a weight...

Code of Federal Regulations, 2010 CFR

2010-07-01

... includes an item (e.g., boat, trailer, ultralight vehicle) for which a weight additive is assessed by the... which a weight additive is assessed by the HHG carrier, am I responsible for payment? If your HHG shipment includes an item (e.g., boat or trailer of reasonable size) for which a weight additive is...

41 CFR 302-7.20 - If my HHG shipment includes an item (e.g., boat, trailer, ultralight vehicle) for which a weight...

Code of Federal Regulations, 2011 CFR

2011-07-01

... includes an item (e.g., boat, trailer, ultralight vehicle) for which a weight additive is assessed by the... which a weight additive is assessed by the HHG carrier, am I responsible for payment? If your HHG shipment includes an item (e.g., boat or trailer of reasonable size) for which a weight additive is...

A Summary of the Experimental Results for a Generic Tractor-Trailer in the Ames Research Center 7- by 10-Foot and 12-Foot Wind Tunnels

NASA Technical Reports Server (NTRS)

Storms, Bruce L.; Satran, Dale R.; Heineck, James T.; Walker, Stephen M.

2006-01-01

Experimental measurements of a generic tractor-trailer were obtained in two wind tunnels at Ames Research Center. After a preliminary study at atmospheric conditions in the 7- by 10-Foot Wind Tunnel, additional testing was conducted at Reynolds numbers corresponding to full-scale highway speeds in the 12-Foot Pressure Wind Tunnel. To facilitate computational modeling, the 1:8-scale geometry, designated the Generic Conventional Model, included a simplified underbody and omitted many small-scale details. The measurements included overall and component forces and moments, static and dynamic surface pressures, and three-component particle image velocimetry. This summary report highlights the effects of numerous drag reduction concepts and provides details of the model installation in both wind tunnels. To provide a basis for comparison, the wind-averaged drag coefficient was tabulated for all configurations tested. Relative to the baseline configuration representative of a modern class-8 tractor-trailer, the most effective concepts were the trailer base flaps and trailer belly box providing a drag-coefficient reduction of 0.0855 and 0.0494, respectively. Trailer side skirts were less effective yielding a drag reduction of 0.0260. The database of this experimental effort is publicly available for further analysis.

Photovoltaic Power System and Power Distribution Demonstration for the Desert RATS Program

NASA Technical Reports Server (NTRS)

Colozza, Anthony; Jakupca, Ian; Mintz, Toby; Herlacher, Mike; Hussey, Sam

2012-01-01

A stand alone, mobile photovoltaic power system along with a cable deployment system was designed and constructed to take part in the Desert Research And Technology Studies (RATS) lunar surface human interaction evaluation program at Cinder Lake, Arizona. The power system consisted of a photovoltaic array/battery system. It is capable of providing 1 kW of electrical power. The system outputs were 48 V DC, 110 V AC, and 220 V AC. A cable reel with 200 m of power cable was used to provide power from the trailer to a remote location. The cable reel was installed on a small trailer. The reel was powered to provide low to no tension deployment of the cable. The cable was connected to the 220 V AC output of the power system trailer. The power was then converted back to 110 V AC on the cable deployment trailer for use at the remote site. The Scout lunar rover demonstration vehicle was used to tow the cable trailer and deploy the power cable. This deployment was performed under a number of operational scenarios, manned operation, remote operation and tele-robotically. Once deployed, the cable was used to provide power, from the power system trailer, to run various operational tasks at the remote location.

Analysis and experimental kinematics of a skid-steering wheeled robot based on a laser scanner sensor.

PubMed

Wang, Tianmiao; Wu, Yao; Liang, Jianhong; Han, Chenhao; Chen, Jiao; Zhao, Qiteng

2015-04-24

Skid-steering mobile robots are widely used because of their simple mechanism and robustness. However, due to the complex wheel-ground interactions and the kinematic constraints, it is a challenge to understand the kinematics and dynamics of such a robotic platform. In this paper, we develop an analysis and experimental kinematic scheme for a skid-steering wheeled vehicle based-on a laser scanner sensor. The kinematics model is established based on the boundedness of the instantaneous centers of rotation (ICR) of treads on the 2D motion plane. The kinematic parameters (the ICR coefficient , the path curvature variable and robot speed ), including the effect of vehicle dynamics, are introduced to describe the kinematics model. Then, an exact but costly dynamic model is used and the simulation of this model's stationary response for the vehicle shows a qualitative relationship for the specified parameters and . Moreover, the parameters of the kinematic model are determined based-on a laser scanner localization experimental analysis method with a skid-steering robotic platform, Pioneer P3-AT. The relationship between the ICR coefficient and two physical factors is studied, i.e., the radius of the path curvature and the robot speed . An empirical function-based relationship between the ICR coefficient of the robot and the path parameters is derived. To validate the obtained results, it is empirically demonstrated that the proposed kinematics model significantly improves the dead-reckoning performance of this skid-steering robot.

Observations of market pigs following transport to a packing plant.

PubMed

Kephart, K B; Harper, M T; Raines, C R

2010-06-01

A field study was conducted to record observations of 41,744 market-weight pigs upon arrival at a commercial abattoir to evaluate the relationships between various independent factors and open-mouth breathing, skin discoloration, lameness, unloading time, and mortality during transport. Observations were recorded from 242 trailer loads on 46 separate days over a period of 14 mo. Travel time (<2.5 h or >or=2.5 h), wait time before unloading (<20 min or >or=20 min), loading pressure (<260 kg of BW/m(2) trailer floor space or >or=260 kg of BW/m(2) trailer floor space), ambient temperature while unloading (<17 degrees C or >or=17 degrees C), and trailer type [potbelly (PB); straight-deck with conventional unloading doors (SDC); or straight-deck with wide unloading doors (SDW)] were recorded for each load. Open-mouth breathing was more prevalent in pigs when transported on PB trailers compared with that of SDC or SDW trailers (P < 0.01), and at warmer temperatures (>or=17 degrees C, P < 0.001). Skin discoloration was more prevalent (P < 0.001) among pigs unloaded at temperatures >or=17 degrees C. Lameness was more prevalent (P < 0.05) after shorter travel times at greater loading pressure compared with shorter travel times at decreased loading pressure. Unloading time for PB trailers was longer (P < 0.001) than for SDC and SDW. Mortality rates during transport were minimal (0.06%) in the deliveries that we observed, and there were no significant (P > 0.10) relationships between mortality and any independent variable tested. Wait time before unloading was not associated (P > 0.10) with any of the dependent variables included in the statistical model. In conclusion, warmer ambient temperatures (>or=17 degrees C) and the use of PB trailers are associated with an increased incidence of open-mouth breathing and skin discoloration, and longer unloading times after the transport of market pigs.

Modeling of traction-coupling properties of wheel propulsor

NASA Astrophysics Data System (ADS)

Sakhapov, R. L.; Nikolaeva, R. V.; Gatiyatullin, M. H.; Makhmutov, M. M.

2017-12-01

In conditions of operation of aggregates on soils with low bearing capacity, the main performance indicators of their operation are determined by the properties of retaining the functional qualities of the propulsor. Therefore, the parameters of the anti-skid device can not be calculated by only one criterion. The equipment of propellers with anti-skid devices, which allow to reduce the compaction effect of the propulsion device on the soil, seems to be a rational solution to the problem of increasing traction and coupling properties of the driving wheels. The mathematical model is based on the study of the interaction of the driving wheel with anti-skid devices and a deformable bearing surface, which takes into account the wheel diameter, skid coefficient, the parameters of the anti-skid device, the physical and mechanical properties of the soil. As a basic mathematical model that determines the dependence of the coupling properties on the wheel parameters, the model obtained as a result of integration and reflecting the process of soil deformation from the shear stress is adopted. The total value of the resistance forces will determine the force of the hitch pressure on the horizontal soil layers, and the value of its deformation is the degree of wheel slippage. When the anti-skid devices interact with the soil, the traction capacity of the wheel is composed of shear forces, soil shear and soil deformation forces with detachable hooks. As a result of the interaction of the hook with the soil, the latter presses against the walls of the hook with the force equal to the sum of the hook load and the resistance to movement. During operation, the linear dimensions of the hook will decrease, which is not taken into account by the safety factor. Abrasive wear of the thickness of the hook is approximately proportional to the work of friction caused by the movement of the hook when inserted into the soil and slipping the wheel.

76 FR 7098 - Dealer Floor Plan Pilot Program

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-09

... inventory, including but not limited to automobiles, motorcycles, boats (including boat trailers..., including but not limited to automobiles, motorcycles, boats (including boat trailers), recreational...

Oil Spill Response Technology Initiation Decision Report to the Pollution Abatement Ashore Program

DTIC Science & Technology

2007-12-01

Canada, Mexico ITAC – International Boats/Helos – VHF Trailers /Tracks – Internet, phones, 800 mHz Handhelds, VHF Patching – connect to other...EPA Trailer w/ com antenna Lisa, START (Superfund Tech Assessment + Response Team) Contractor, Emerg Response Team Bob, Fields unit, using...NMCI access – can’t work for response + satellite comms tested VOIP & internet + participation by City of Chicago – Trailer brought to get comms to

Full-Tree SKidding Black Spruce: Another Way to Favor Reproduction

Treesearch

William F. Johnston

1975-01-01

An alternative to burning is needed for clearcut peatlands where only slash disposal is required to rapidly reproduce black spruce. A 2-year trial in north-central Minnesota indicates that reproduction will be rapid after full-tree skidding on nonbrushy sites taht have well-distribted sphagnum seedbeds and ample natural seeding. Broadcast burning is still recommended...

Forestry best management practices and sediment control at skidder stream crossings

Treesearch

Laura R. Wear; W. Michael Aust; M. Chad Bolding; Brian D. Strahm; Andrew C. Dolloff

2015-01-01

Stream crossings for skid trails have high sediment delivery ratios. Forestry Best Management Practices (BMPs) have proven to be effective for erosion control, but few studies have quantified the impact of various levels of BMPs on sedimentation. In this study, three skid-trail stream-crossing BMP treatments were installed on nine operational stream crossings (three...

77 FR 4914 - Consumer Information Regulations; Fees for Use of Traction Skid Pads

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-01

... found at 49 CFR 575.104. To aid consumers in making an informed choice in the purchase of passenger car..., App. B. Several commercial facilities also have traction skid pads. The current fees charged for use... these tires for purchase by manufacturers. Based on NHTSA's assessment using a ``market price'' analysis...

Felling and skidding productivity and harvesting cost in southern pine forests

Treesearch

R.A. Kluender; B.J. Stokes

1996-01-01

Sixteen stands were harvested at various levels of basal area removed (intensity). Chainsaw felling productivity was more sensitive to stem diameter than harvest intensity. Skidding productivity was highest when removing large trees at high intensity. Harvesting cost was more sensitive to stem size than harvest intensity, although harvest intensity was a very important...

46 CFR 160.042-2 - General requirements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... requirements. (a) The requirements of this subpart provide for a standard life raft skid for use on ocean and coastwise vessels in conjunction with the stowage of Type A rafts which may be used on such vessels. (b) Life raft skids shall be constructed and arranged so as to properly support a Type A life raft in the...

Flail-Delimbing of Loblolly Pine - A Case Study

Treesearch

Bryce J. Stokes

1985-01-01

Flail-delimbing was tested in small-diameter loblolly pine. Most of the limbs left on the stems were less than 6 inches long. Over 75 percent of the delimbed stems had three or fewer remaining limbs. The cost was determined by comparing skidding-flailing with skidding only. The cost difference was approximately $6.00 per unit.

Characteristics of Trailer Thermal Environment during Commercial Swine Transport Managed under U.S. Industry Guidelines

PubMed Central

Xiong, Yijie; Green, Angela; Gates, Richard S.

2015-01-01

Simple Summary Temperature and thermal conditions of the interior of a swine trailer during transport were monitored over a broad range of outdoor conditions (34 trips total) managed according to industry best practice (Transport Quality Assurance (TQA) guidelines (NPB, 2008)). For the outdoor temperature range of 5 °C (40 °F) to 27 °C (80 °F), generally acceptable trailer thermal conditions were observed according to the TQA. Beyond this outdoor temperature range, undesirable conditions within the trailer were prevalent. Areas for potential improvement in transport management were identified. Stops resulted in rapid increases in temperature, which could be beneficial during cooler outdoor temperatures, but detrimental for warmer outdoor temperatures. Abstract Transport is a critical factor in modern pork production and can seriously affect swine welfare. While previous research has explored thermal conditions during transport, the impact of extreme weather conditions on the trailer thermal environment under industry practices has not been well documented; and the critical factors impacting microclimate are not well understood. To assess the trailer microclimate during transport events, an instrumentation system was designed and installed at the central ceiling level, pig level and floor-level in each of six zones inside a commercial swine trailer. Transport environmental data from 34 monitoring trips (approximately 1–4 h in duration each) were collected from May, 2012, to February, 2013, with trailer management corresponding to the National Pork Board Transport Quality Assurance (TQA) guidelines in 31 of these trips. According to the TQA guidelines, for outdoor temperature ranging from 5 °C (40 °F) to 27 °C (80 °F), acceptable thermal conditions were observed based on the criteria that no more than 10% of the trip duration was above 35 °C (95 °F) or below 0 °C (32 °F). Recommended bedding, boarding and water application were sufficient in this range. Measurements support relaxing boarding guidelines for moderate outdoor conditions, as this did not result in less desirable conditions. Pigs experienced extended undesirable thermal conditions for outdoor temperatures above 27 °C (80 °F) or below 5 °C (40 °F), meriting a recommendation for further assessment of bedding, boarding and water application guidelines for extreme outdoor temperatures. An Emergency Livestock Weather Safety Index (LWSI) condition was observed inside the trailer when outdoor temperature exceeded 10 °C (50 °F); although the validity of LWSI to indicate heat stress for pigs during transport is not well established. Extreme pig surface temperatures in the rear and middle zones of the trailer were more frequently experienced than in the front zones, and the few observations of pigs dead or down upon arrival were noted in these zones. Observations indicate that arranging boarding placement may alter the ventilation patterns inside the trailer. PMID:26479232

Drag Reduction CFD Simulations and Flow Visualization of Light Vehicle-Trailer Systems

NASA Astrophysics Data System (ADS)

Sigurdson, Lorenz; Boyer, Henry; Lange, Carlos F.

2016-11-01

Experiments and CFD were performed to study the effect a deflector had on the flow and drag force associated with a 2010 F-150 truck and cargo trailer Light Vehicle-Trailer System (LVTS). Image Correlation Velocimetry (ICV) on smokewire streaklines measured the velocity field on the model mid-plane. CFD estimated the drag reduction as 13% at a Re of 14,900 with a moving ground-plane, and 17% without. Experiments suggested that the low Re does not diminish the full-scale relevance of the drag reduction results. One low Re effect was the presence of a separation bubble on the hood of the tow vehicle whose size reduced with an increase in Re. Three other characteristic flow patterns were identified: separation off the lead vehicle cab, stagnation of the free-stream on the trailer face for the no-deflector case, and subsequent separation at the trailer front corner. Comparisons of the ICV and CFD results with no deflector indicated good agreement in the direction of the velocity vectors, and the smoke streaklines and CFD streamlines also agreed well. However, for the deflector case, the CFD found an entirely different topological solution absent in the experiment. A pair of vertically-oriented mid-plane vortices were wrapped around the front of the trailer. Support from the Canadian Natural Sciences and Engineering Research Council Grant 41747 is gratefully acknowledged.

Freight Wing Trailer Aerodynamics Final Technical Report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Sean Graham

2007-10-31

Freight Wing Incorporated utilized the opportunity presented by a DOE category two Inventions and Innovations grant to commercialize and improve upon aerodynamic technology for semi-tuck trailers, capable of decreasing heavy vehicle fuel consumption, related environmental damage, and U.S. consumption of foreign oil. Major project goals included the demonstration of aerodynamic trailer technology in trucking fleet operations, and the development and testing of second generation products. A great deal of past scientific research has demonstrated that streamlining box shaped semi-trailers can significantly reduce a truck’s fuel consumption. However, significant design challenges have prevented past concepts from meeting industry needs. Freight Wingmore » utilized a 2003 category one Inventions and Innovations grant to develop practical solutions to trailer aerodynamics. Fairings developed for the front, rear, and bottom of standard semi-trailers together demonstrated a 7% improvement to fuel economy in scientific tests conducted by the Transportation Research Center (TRC). Operational tests with major trucking fleets proved the functionality of the products, which were subsequently brought to market. This category two grant enabled Freight Wing to further develop, test and commercialize its products, resulting in greatly increased understanding and acceptance of aerodynamic trailer technology. Commercialization was stimulated by offering trucking fleets 50% cost sharing on trial implementations of Freight Wing products for testing and evaluation purposes. Over 230 fairings were implemented through the program with 35 trucking fleets including industry leaders such as Wal-Mart, Frito Lay and Whole Foods. The feedback from these testing partnerships was quite positive with product performance exceeding fleet expectations in many cases. Fleet feedback also was also valuable from a product development standpoint and assisted the design of several second generation products intended to further improve efficiency, lower costs, and enhance durability. Resulting products demonstrated a 30% efficiency improvement in full scale wind tunnel tests. The fuel savings of our most promising product, the “Belly Fairing” increased from 4% to 6% in scientific track and operational tests. The project successfully demonstrated the economic feasibility of trailer aerodynamics and positioned the technology to realize significant public benefits. Scientific testing conducted with partners such as the EPA Smartway program and Transport Canada clearly validated the fuel and emission saving potential of the technology. The Smartway program now recommends trailer aerodynamics as a certified fuel saving technology and is offering incentives such as low interest loans. Trailer aerodynamics can save average trucks over 1,100 gallons of fuel an 13 tons of emissions every 100,000 miles, a distance many trucks travel annually. These fuel savings produce a product return on investment period of one to two years in average fleet operations. The economic feasibility of the products was validated by participating fleets, several of which have since completed large implementations or demonstrated an interest in volume orders. The commercialization potential of the technology was also demonstrated, resulting in a national distribution and manufacturing partnership with a major industry supplier, Carrier Transicold. Consequently, Freight Wing is well positioned to continue marketing trailer aerodynamics to the trucking industry. The participation of leading fleets in this project served to break down the market skepticism that represents a primary barrier to widespread industry utilization. The benefits of widespread utilization of the technology could be quite significant for both the transportation industry and the public. Trailer aerodynamics could potentially save the U.S. trucking fleet over a billion gallons of fuel and 20 million tons of emissions annually.« less

14 CFR 29.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2012 CFR

2012-01-01

... exceed those obtained in a drop test of the gear with— (i) A drop height of 1.5 times that specified in § 29.725; and (ii) An assumed rotor lift of not more than 1.5 times that used in the limit drop tests...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions...

14 CFR 27.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2012 CFR

2012-01-01

... exceed those obtained in a drop test of the gear with— (i) A drop height of 1.5 times that specified in § 27.725; and (ii) An assumed rotor lift of not more than 1.5 times that used in the limit drop tests...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions...

14 CFR 29.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2014 CFR

2014-01-01

... exceed those obtained in a drop test of the gear with— (i) A drop height of 1.5 times that specified in § 29.725; and (ii) An assumed rotor lift of not more than 1.5 times that used in the limit drop tests...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions...

14 CFR 27.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2014 CFR

2014-01-01

... exceed those obtained in a drop test of the gear with— (i) A drop height of 1.5 times that specified in § 27.725; and (ii) An assumed rotor lift of not more than 1.5 times that used in the limit drop tests...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions...

14 CFR 29.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2013 CFR

2013-01-01

... exceed those obtained in a drop test of the gear with— (i) A drop height of 1.5 times that specified in § 29.725; and (ii) An assumed rotor lift of not more than 1.5 times that used in the limit drop tests...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions...

14 CFR 27.501 - Ground loading conditions: landing gear with skids.

Code of Federal Regulations, 2013 CFR

2013-01-01

... exceed those obtained in a drop test of the gear with— (i) A drop height of 1.5 times that specified in § 27.725; and (ii) An assumed rotor lift of not more than 1.5 times that used in the limit drop tests...) The ground reactions rationally distributed along the bottom of the skid tube. (b) Vertical reactions...

46 CFR Appendix A to Part 520 - Standard Terminology and Codes

Code of Federal Regulations, 2011 CFR

2011-10-01

... DTB Firkin FIR Flo-Bin FLO Frame FRM Flask FSK Forward Reel FWR Garment on Hanger GOH Heads of Beef... Private Vehicle POV Pipe Rack PRK Quarters of Beef QTR Rail (semiconductor) RAL Rack RCK Reel REL Roll ROL Reverse Reel RVR Sack SAK Shook SHK Sides of Beef SID Skid SKD Skid, Elev, Lift Trk SKE Sleeve SLV Spin...

46 CFR Appendix A to Part 520 - Standard Terminology and Codes

Code of Federal Regulations, 2012 CFR

2012-10-01

... DTB Firkin FIR Flo-Bin FLO Frame FRM Flask FSK Forward Reel FWR Garment on Hanger GOH Heads of Beef... Private Vehicle POV Pipe Rack PRK Quarters of Beef QTR Rail (semiconductor) RAL Rack RCK Reel REL Roll ROL Reverse Reel RVR Sack SAK Shook SHK Sides of Beef SID Skid SKD Skid, Elev, Lift Trk SKE Sleeve SLV Spin...

46 CFR Appendix A to Part 520 - Standard Terminology and Codes

Code of Federal Regulations, 2013 CFR

2013-10-01

... DTB Firkin FIR Flo-Bin FLO Frame FRM Flask FSK Forward Reel FWR Garment on Hanger GOH Heads of Beef... Private Vehicle POV Pipe Rack PRK Quarters of Beef QTR Rail (semiconductor) RAL Rack RCK Reel REL Roll ROL Reverse Reel RVR Sack SAK Shook SHK Sides of Beef SID Skid SKD Skid, Elev, Lift Trk SKE Sleeve SLV Spin...

46 CFR Appendix A to Part 520 - Standard Terminology and Codes

Code of Federal Regulations, 2014 CFR

2014-10-01

... DTB Firkin FIR Flo-Bin FLO Frame FRM Flask FSK Forward Reel FWR Garment on Hanger GOH Heads of Beef... Private Vehicle POV Pipe Rack PRK Quarters of Beef QTR Rail (semiconductor) RAL Rack RCK Reel REL Roll ROL Reverse Reel RVR Sack SAK Shook SHK Sides of Beef SID Skid SKD Skid, Elev, Lift Trk SKE Sleeve SLV Spin...

46 CFR Appendix A to Part 520 - Standard Terminology and Codes

Code of Federal Regulations, 2010 CFR

2010-10-01

... DTB Firkin FIR Flo-Bin FLO Frame FRM Flask FSK Forward Reel FWR Garment on Hanger GOH Heads of Beef... Private Vehicle POV Pipe Rack PRK Quarters of Beef QTR Rail (semiconductor) RAL Rack RCK Reel REL Roll ROL Reverse Reel RVR Sack SAK Shook SHK Sides of Beef SID Skid SKD Skid, Elev, Lift Trk SKE Sleeve SLV Spin...

Skidding with horses to thin young stands in western Washington.

Treesearch

Norman P. Worthington

1957-01-01

Increased use of commercial thinning to provide an additional source of needed raw material and to boost overall yields from forest lands has again brought horses into the northwest woods. They are particularly well adapted to skidding small logs under the light, frequent cuts typical of a thinning operation. Horses can, moreover, work at close quarters in a young...

Felling and skidding cost estimates for thinnings to reduce gypsy moth impacts

Treesearch

Michael D. Erickson; Curt C. Hassler; Chris B. LeDoux

1991-01-01

The gypsy moth is a serious threat to the hardwood forests of the eastern United States. Although chemical treatments currently exist which can be used to help control the impacts of the moth, silvicultural control measures are just now being proposed and tested. Felling and skidding cost estimates for harvesting merchantable timber under two such proposed...

Economic comparisons of haul road construction versus forwarding versus longer skid distances

Treesearch

Michael D. Erickson; Curt C. Hassler; Chris B. LeDoux

1992-01-01

There currently exists no set of basic guidelines for Appalachian loggers to use in the decision making process for selecting the best way to harvest a tract of timber. Specifically, guidelines are needed for deciding between the alternatives of constructing truck haul roads to access an area or other alternatives such as skidding or forwarding timber longer distances...

Logging costs and cutting methods in young-growth ponderosa pine in California

Treesearch

Philip M. McDonald; William A. Atkinson; Dale O. Hall

1969-01-01

Mixed-conifer stands at the Challenge Experimental Forest, Calif., were cut to four specifications: seed-tree, group selection, single tree selection, and clearcut. Logging costs and production rates were compared and evaluated. Cutting method had little effect on felling or skidding production; felling ranged from 1,802 to 2,019 bd ft per hour, and skidding from 3,138...

78. GENERAL VIEW OF SLC3W FUEL APRON FROM NORTH. HELIUM ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

78. GENERAL VIEW OF SLC-3W FUEL APRON FROM NORTH. HELIUM AND NITROGEN STORAGE TANKS AND CONTROL SKIDS IN LEFT CENTER. FUEL STORAGE TANK AND CONTROL SKID IN RIGHT BACKGROUND. SLC-3E MST IN DISTANT RIGHT BACKGROUND. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Command, Control, Communications And Intelligence (C3I) Project Book, Fiscal Year 1993

DTIC Science & Technology

1992-10-30

trailers . PM MILSTAR will integrate the GNDCPs into the Army force structure. , . A /" " 1 9S. N/TRC -194 HISTORICAL BACKGROUND: Feb 89 - Army assigns...configuration consists of an S-250 shelter mounted on a truck with a trailer and generator. SCOTT is the ground segment terminal . of the Milstar system...WITH A TRAILER MOUNTED THREE KILOWATT GENERATOR AND ANTENNA. MILSCOTT/11 11-2 PM. MILSTAR (ARMY) SECURE MOBILE ANTI-JAM RELIABLE TACTICAL TERMINAL

A Survey of Commercial Local Delivery Security Methods and Their Potential for Application at NSC (Naval Supply Center), San Diego, California.

DTIC Science & Technology

1986-12-01

Dry Provisions 35 ft. 4 40 ft. 3 --Trailer, 40 ft., flatbed 20 GSK --Trailer, 35 ft., lowboy 1 Bulk 55 ft., 1 Commercial Hire --Stake Truck, 2 / ton 2...wn r r r r------------ *0 warehouse area have plastic laminated badges. Visitors are also issued plastic identification badges after gate clearance...GSK material in warehouses is, therefore, considered very secure. In transit, GSK generally travels by flatbed trailer. Vans are not used because

7 CFR 868.1 - Meaning of terms.

Code of Federal Regulations, 2011 CFR

2011-01-01

... by a cooperator. (9) Carrier. A truck, trailer, truck/trailer(s) combination, railroad car, barge... limited to machines, utensils, vehicles, and fixtures located in or about the premises) used or employed...

Outlook for trucks and trailers

DOT National Transportation Integrated Search

2005-11-01

Demand for commercial trucks and trailers scored impressive gains last year as a vibrant : economy, strong customer markets, relatively modest levels of inflation and interest rates, : and the accelerated depreciation provisions of the Tax Stimulus p...

49 CFR 391.21 - Application for employment.

Code of Federal Regulations, 2010 CFR

2010-10-01

... (such as buses, trucks, truck tractors, semitrailers, full trailers, and pole trailers) which he/she has... fatalities or personal injuries it caused; (8) A list of all violations of motor vehicle laws or ordinances...

Effects of soil compaction on residual stand growth in central Appalachian hardwood forest: a preliminary case study

Treesearch

Jingxin Wang; Chris LeDoux; Michael Vanderberg; Li Yaoxiang

2006-01-01

A preliminary study that quantified the impacts of soil compaction on residual tree growth associated with ground-based skidding traffic intensity and turn payload size was investigated in the central Appalachian hardwood forest. The field study was carried out on a 20-acre tract of the West Virginia University Research Forest. Skid trails were laid out in 170' -...

Long-term stand growth after helicopter and ground-based skidding in a tupelo-cypress wetland: 21-year results

Treesearch

D.E. Evans; W.M. Aust; J.A. Peterson

2013-01-01

Three disturbance treatments were implemented on a tupelo-cypress forested wetland in southwestern Alabama on the Tensaw River in 1986: (1) clearcutting with helicopter log removal (HELI), (2) HELI followed by rubber-tired skidder traffic simulation (SKID), and (3) HELI followed by removal of all vegetation during the first two growing seasons via glyphosate herbicide...

Reclamation of skid roads with fiber mats and native vegetation: effects on erosion

Treesearch

shawn T. Grushecky; David w. McGill; William Grafton; John Edwards; Lisa Tager

2007-01-01

A research study was established to test the effectiveness of fiber mats and native seed mixtures in reducing soil erosion from newly-constructed skid roads in the Elk River Watershed in central West Virginia. Twelve road sections of equal grade were paired with a randomly-selected section receiving a fiber mat and native grass seed while the other road section was not...

114. WEST SIDE OF LIQUID OXYGEN CONTROL ROOM (205). LIQUID ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

114. WEST SIDE OF LIQUID OXYGEN CONTROL ROOM (205). LIQUID NITROGEN (LN2) SUBCOOLER ON LEFT; SKID 8, LIQUID OXYGEN CONTROLLER FOR SWITCHING BETWEEN RAPID-LOAD AND TOPPING ON RIGHT. LIQUID OXYGEN LINE FROM SKID 9A AT RIGHT EDGE OF PHOTO. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Soil disturbance and 10-year growth response of coast Douglas-fir on nontilled and tilled skid trails in the Oregon Cascades.

Treesearch

Ronald Heninger; William Scott; Alex Dobkowski; Richard Miller; Harry Anderson; Steve Duke

2002-01-01

We (i) quantified effects of skidder yarding on soil properties and seedling growth in a portion of western Oregon, (ii) determined if tilling skid trails improved tree growth, and (iii) compared results with those from an earlier investigation in coastal Washington. Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were hand planted at...

'Skidding' of the CRRES G-9 barium release

NASA Technical Reports Server (NTRS)

Huba, J. D.; Mitchell, H. G.; Fedder, J. A.; Bernhardt, P. A.

1992-01-01

A simulation study and experimental data of the CRRES G-9 ionospheric barium release are presented. The simulation study is based on a 2D electrostatic code that incorporates time-dependent coupling to the background plasma. It is shown that the densest portion of the barium ion cloud 'skids' about 15 km within the first three seconds following the release, consistent with the optical data analyses.

Effects of Mechanical Soil Disturbance on Rill Connectivity and Soil Erosion Following Logging on Burned Hillslopes in Central California

NASA Astrophysics Data System (ADS)

Olsen, W.; Wagenbrenner, J. W.; Demirtas, I.; Robichaud, P. R.

2016-12-01

Soil erosion rates in forests increase after severe fires and may pose a threat to aquatic resources. While research has shown that the harvest of burned trees ("salvage logging") may elevate post-fire erosion, it is less clear how disturbance from logging affects rill erosion and sediment yields. We studied 14 catchments (900-7400 m2 "swales") in the area burned by the 2013 Rim Fire in the California Sierra Nevada, nine of which were burned and logged, and five that were burned and unlogged. We installed silt fences, surveyed mechanical disturbance and rill networks, and measured ground cover following logging that occurred between fall 2014 and fall 2015. The logged swales had 20-162 trees ha-1 removed, and high traffic skid trails covered 8-28% of the swale area while low traffic skid trails covered 0-13% of the area. Feller-buncher tracks were minimal at 0-6% of the swale area. Following logging, wood cover increased, while vegetation cover remained about the same. Rills densities ranged from 0.3-22 m m-2 in logged swales and 2.2-16 m m-2 in unlogged swales. Higher bare soil percentages led to increased rill density in all swales. Rills that initiated in high traffic skid trails averaged 42 m in the swales, while rills from untrafficked burned soil averaged 26 m. The number of rills from high traffic skid trails increased with the amount of skid trail area, and often were diverted by waterbars toward the swale outlets. Sediment yields increased with rill density, and did not appear to respond to the modest increase in wood cover post-logging. Results indicate that rill erosion is a dominant sediment transport mechanism for both burned forests and salvage logged forests at the hillslope to small catchment scale. Mitigating skidding disturbance, appropriate placement of waterbars, and reducing the connectivity of bare soil after logging will be important to reduce rilling and sediment yields related to salvage logging.

SCaN Transportable Communication Platform (STCP)

NASA Technical Reports Server (NTRS)

Haddad, George; Tanger, Thomas; Pleva, David; Schoenholz, Bryan; Nam, Connor

2017-01-01

NASA Glenn Research Center required a satellite communication trailer that served dual purposes; 24/7 Emergency Communication Services (ECS) in the event of a natural or manmade disaster that disrupted conventional communications, and a Ka Band NASA TDRS capability providing a research capability for over the air evaluations/characterizations. The trailer was to be field deployable, environmentally controlled and self-contained providing local area networks (LANs) and Wide Area Networks (WAN's) with user access both wired (Ethernet) and wireless (802.11) supporting VoIP, Internet Web access and Email. The TDRSS terminal included a 200W TWT amplifier mounted on the feed boom, individual up and down converters, and custom integrated waveguide and a supporting feed system. Other features such as a mast, generator, electrical, lighting, surveillance, and storage capabilities were also required. The Trailer was developed and demonstrated these original requested capabilities. New Requirements are defined and the trailer is now being evolved and upgraded to be a backup for the Near- Earth Network (NEN) Stations at KSC that will support the launch phase of EM-1. This paper presents the current and future capabilities of the trailer and additional options that will make it a valuable deployable asset to support remote operations from any launch from location.

Driver assistance system for passive multi-trailer vehicles with haptic steering limitations on the leading unit.

PubMed

Morales, Jesús; Mandow, Anthony; Martínez, Jorge L; Reina, Antonio J; García-Cerezo, Alfonso

2013-04-03

Driving vehicles with one or more passive trailers has difficulties in both forward and backward motion due to inter-unit collisions, jackknife, and lack of visibility. Consequently, advanced driver assistance systems (ADAS) for multi-trailer combinations can be beneficial to accident avoidance as well as to driver comfort. The ADAS proposed in this paper aims to prevent unsafe steering commands by means of a haptic handwheel. Furthermore, when driving in reverse, the steering-wheel and pedals can be used as if the vehicle was driven from the back of the last trailer with visual aid from a rear-view camera. This solution, which can be implemented in drive-by-wire vehicles with hitch angle sensors, profits from two methods previously developed by the authors: safe steering by applying a curvature limitation to the leading unit, and a virtual tractor concept for backward motion that includes the complex case of set-point propagation through on-axle hitches. The paper addresses system requirements and provides implementation details to tele-operate two different off- and on-axle combinations of a tracked mobile robot pulling and pushing two dissimilar trailers.

Driver Assistance System for Passive Multi-Trailer Vehicles with Haptic Steering Limitations on the Leading Unit

PubMed Central

Morales, Jesús; Mandow, Anthony; Martínez, Jorge L.; Reina, Antonio J.; García-Cerezo, Alfonso

2013-01-01

Driving vehicles with one or more passive trailers has difficulties in both forward and backward motion due to inter-unit collisions, jackknife, and lack of visibility. Consequently, advanced driver assistance systems (ADAS) for multi-trailer combinations can be beneficial to accident avoidance as well as to driver comfort. The ADAS proposed in this paper aims to prevent unsafe steering commands by means of a haptic handwheel. Furthermore, when driving in reverse, the steering-wheel and pedals can be used as if the vehicle was driven from the back of the last trailer with visual aid from a rear-view camera. This solution, which can be implemented in drive-by-wire vehicles with hitch angle sensors, profits from two methods previously developed by the authors: safe steering by applying a curvature limitation to the leading unit, and a virtual tractor concept for backward motion that includes the complex case of set-point propagation through on-axle hitches. The paper addresses system requirements and provides implementation details to tele-operate two different off- and on-axle combinations of a tracked mobile robot pulling and pushing two dissimilar trailers. PMID:23552102

Precursor-product discrimination by La protein during tRNA metabolism

PubMed Central

Bayfield, Mark A.; Maraia, Richard J.

2009-01-01

SUMMARY La proteins bind pre-tRNAs at their UUU-3'OH ends, facilitating their maturation. While the mechanism by which La binds pre-tRNA 3' trailers is known, the function of the RNA-binding β-sheet surface of RRM1 is unknown. How La dissociates from UUU-3'OH-containing trailers after 3' processing is also unknown. La preferentially binds pre-tRNAs over processed tRNAs or 3' trailer products through coupled use of two sites: one on the La motif and another on the RRM1 β surface that binds elsewhere on tRNA. Two sites provide stable pre-tRNA binding while processed tRNA and 3' trailer are released from their single sites relatively fast. RRM1 loop-3 mutations decrease affinity for pre-tRNA and tRNA but not UUU-3'OH trailer, and impair tRNA maturation in vivo. We propose that RRM1 functions in activities that are more complex than UUU-3'OH binding. Accordingly, the RRM1 mutations also impair a RNA chaperone activity of La. The results suggest how La distinguishes precursor from product RNAs, allowing it to recycle onto a new pre-tRNA. PMID:19287396

Catch me if you can: Comparing ballast water sampling skids to traditional net sampling

NASA Astrophysics Data System (ADS)

Bradie, Johanna; Gianoli, Claudio; Linley, Robert Dallas; Schillak, Lothar; Schneider, Gerd; Stehouwer, Peter; Bailey, Sarah

2018-03-01

With the recent ratification of the International Convention for the Control and Management of Ships' Ballast Water and Sediments, 2004, it will soon be necessary to assess ships for compliance with ballast water discharge standards. Sampling skids that allow the efficient collection of ballast water samples in a compact space have been developed for this purpose. We ran 22 trials on board the RV Meteor from June 4-15, 2015 to evaluate the performance of three ballast water sampling devices (traditional plankton net, Triton sampling skid, SGS sampling skid) for three organism size classes: ≥ 50 μm, ≥ 10 μm to < 50 μm, and < 10 μm. Natural sea water was run through the ballast water system and untreated samples were collected using paired sampling devices. Collected samples were analyzed in parallel by multiple analysts using several different analytic methods to quantify organism concentrations. To determine whether there were differences in the number of viable organisms collected across sampling devices, results were standardized and statistically treated to filter out other sources of variability, resulting in an outcome variable representing the mean difference in measurements that can be attributed to sampling devices. These results were tested for significance using pairwise Tukey contrasts. Differences in organism concentrations were found in 50% of comparisons between sampling skids and the plankton net for ≥ 50 μm, and ≥ 10 μm to < 50 μm size classes, with net samples containing either higher or lower densities. There were no differences for < 10 μm organisms. Future work will be required to explicitly examine the potential effects of flow velocity, sampling duration, sampled volume, and organism concentrations on sampling device performance.

SmartWay Tractor and Trailer Logo Usage Instructions

EPA Pesticide Factsheets

View a presentation provides guidelines for SmartWay Partners on tractor and trailer logo usage, including SmartWay designated technical specifications and requirements, importance of logo display, how to obtain the logo, and logo placement.

49 CFR 565.21 - Applicability.

Code of Federal Regulations, 2013 CFR

2013-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS Alternative VIN... applicability of this subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, and motorcycles. Vehicles imported into...

49 CFR 565.21 - Applicability.

Code of Federal Regulations, 2011 CFR

2011-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS Alternative VIN... applicability of this subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, and motorcycles. Vehicles imported into...

49 CFR 565.21 - Applicability.

Code of Federal Regulations, 2012 CFR

2012-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS Alternative VIN... applicability of this subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, and motorcycles. Vehicles imported into...

49 CFR 565.11 - Applicability.

Code of Federal Regulations, 2013 CFR

2013-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS VIN Requirements... subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, low speed vehicles, and motorcycles manufactured on or after...

49 CFR 565.11 - Applicability.

Code of Federal Regulations, 2010 CFR

2010-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS VIN Requirements... subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, low speed vehicles, and motorcycles manufactured on or after...

49 CFR 565.11 - Applicability.

Code of Federal Regulations, 2014 CFR

2014-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS VIN Requirements... subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, low speed vehicles, and motorcycles manufactured on or after...

49 CFR 565.11 - Applicability.

Code of Federal Regulations, 2011 CFR

2011-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS VIN Requirements... subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, low speed vehicles, and motorcycles manufactured on or after...

49 CFR 565.21 - Applicability.

Code of Federal Regulations, 2010 CFR

2010-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS Alternative VIN... applicability of this subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, and motorcycles. Vehicles imported into...

49 CFR 565.21 - Applicability.

Code of Federal Regulations, 2014 CFR

2014-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS Alternative VIN... applicability of this subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, and motorcycles. Vehicles imported into...

49 CFR 565.11 - Applicability.

Code of Federal Regulations, 2012 CFR

2012-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION VEHICLE IDENTIFICATION NUMBER (VIN) REQUIREMENTS VIN Requirements... subpart. This part applies to passenger cars, multipurpose passenger vehicles, trucks, buses, trailers (including trailer kits), incomplete vehicles, low speed vehicles, and motorcycles manufactured on or after...

Learn about SmartWay Tractors and Trailers

EPA Pesticide Factsheets

Companies that lease or purchase tractors or trailers that meet EPA's designated SmartWay standards are using more efficient equipment and may be eligible to put the SmartWay logo on the exterior of their equipment.

Development of Mainshaft High-Speed Cylindrical Roller Bearings for Gas Turbine Engines.

DTIC Science & Technology

1978-10-01

roller motion, that calculation may then be eliminated for subsequent, similar runs. TIhis option provides the user a corresponding savings in computer...to W BEARING DN X !0.6 Figl"re 2..’ Test of Grou p-N Bearing No, ,5 Shows" Increased Skid as l~oad Is N" l)’creans4’d but With No Skid at Anyt Loand

Productivity and cost of manual felling and cable skidding in central Appalachian hardwood forests

Treesearch

Jingxin Wang; Charlie Long; Joe McNeel; John Baumgras; John Baumgras

2004-01-01

A field production study was conducted for a manual harvesting system using a chainsaw and cable skidder in a central Appalachian hardwood forest site. A partial cut was performed on a 50-acre tract with an average slope of 25 percent. Felling time pre tree was most affected by diameter at breast height and the distance between harvested trees while skidding cycle time...

69. GENERAL VIEW OF SOUTH SIDE OF SLC3W LIQUID OXYGEN ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

69. GENERAL VIEW OF SOUTH SIDE OF SLC-3W LIQUID OXYGEN APRON. EQUIPMENT SKIDS IN FOREGROUND. LARGE LIQUID OXYGEN TANKS FLANKING NITROGEN GAS STORAGE TANKS VISIBLE BEHIND SKIDS. LAUNCH DECK VISIBLE IMMEDIATELY WEST. MST IN PARKED POSITION AT NORTHERN TERMINUS OF RAILS IN BACKGROUND. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

View of EPA Farm cattle shelter (featuring horse trailer), facing ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of EPA Farm cattle shelter (featuring horse trailer), facing northwest - Nevada Test Site, Environmental Protection Agency Farm, Shelter Unit Type, Area 15, Yucca Flat, 10-2 Road near Circle Road, Mercury, Nye County, NV

78 FR 12828 - Guizhou Tyre Corporation; Grant of Petition for Decision of Inconsequential Noncompliance

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-25

...'') has determined that certain Samson and Advance brand ST trailer Tires, do not fully comply with... Advance brand ST Trailer Tires manufactured from December 4, 2011 through March 31, 2012. Noncompliance...

June 7, 2017 Webinar: Heavy-Duty Highway Trailers Verify Certification Module and Manufacturer Testing Information

EPA Pesticide Factsheets

This EPA webinar provides information on the Verify module for heavy-duty highway trailer manufacturers including introduction, user registration process, submitting certification information, request for certificate, testing and deployment information.

SmartWay Mark Signature Page: Tractors & Trailers

EPA Pesticide Factsheets

This SmartWay agreement is for companies and organizations who wish to comply with the SmartWay Graphic Standards and Usage Guide guidelines and requirements for using the SmartWay logos on SmartWay designated Tractors and Trailers.

75 FR 68663 - Federal Motor Vehicle Safety Standards; Rear Impact Guards; Rear Impact Protection; Technical...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-08

... Report, on the Effectiveness of Underride Guards for Heavy Trailers AGENCY: National Highway Traffic...: The Effectiveness of Underride Guards for Heavy Trailers. DATES: Comments must be received no later...

Enhanced methods for operating refueling station tube-trailers to reduce refueling cost

DOE Office of Scientific and Technical Information (OSTI.GOV)

Elgowainy, Amgad; Reddi, Krishna

A method and apparatus are provided for operating a refueling station including source tube-trailers and at least one compressor to reduce refueling cost. The refueling station includes a gaseous fuel supply source including a plurality of tanks on a tube trailer coupled to a first control unit, and high pressure buffer storage having predefined capacity coupled to a second control unit and the first tanks by a pressure control valve and the first control unit, and at least one compressor. The refueling station is operated at different modes depending on a state of the refueling station at the beginning ofmore » each operational mode. The refueling system is assessed at the end of each operational mode to identify the state of the system and select a next mode of operation. The operational modes include consolidating hydrogen, or any gaseous fuel, within the tubes mounted on the trailer.« less

Analytical approach to determine vertical dynamics of a semi-trailer truck from the point of view of goods protection

NASA Astrophysics Data System (ADS)

Pidl, Renáta

2018-01-01

The overwhelming majority of intercontinental long-haul transportations of goods are usually carried out on road by semi-trailer trucks. Vibration has a major effect regarding the safety of the transport, the load and the transported goods. This paper deals with the logistics goals from the point of view of vibration and summarizes the methods to predict or measure the vibration load in order to design a proper system. From these methods, the focus of this paper is on the computer simulation of the vibration. An analytical method is presented to calculate the vertical dynamics of a semi-trailer truck containing general viscous damping and exposed to harmonic base excitation. For the purpose of a better understanding, the method will be presented through a simplified four degrees-of-freedom (DOF) half-vehicle model, which neglects the stiffness and damping of the tires, thus the four degrees-of-freedom are the vertical and angular displacements of the truck and the trailer. From the vertical and angular accelerations of the trailer, the vertical acceleration of each point of the platform of the trailer can easily be determined, from which the forces acting on the transported goods are given. As a result of this paper the response of the full platform-load-packaging system to any kind of vehicle, any kind of load and any kind of road condition can be analyzed. The peak acceleration of any point on the platform can be determined by the presented analytical method.

Safety and Hazard Analysis for the Coherent/Acculite Laser Based Sandia Remote Sensing System (Trailer B70).

DOE Office of Scientific and Technical Information (OSTI.GOV)

Augustoni, Arnold L.

A laser safety and hazard analysis is presented, for the Coherent(r) driven Acculite(r) laser central to the Sandia Remote Sensing System (SRSS). The analysis is based on the 2000 version of the American National Standards Institute's (ANSI) Standard Z136.1, for Safe Use of Lasers and the 2000 version of the ANSI Standard Z136.6, for Safe Use of Lasers Outdoors. The trailer (B70) based SRSS laser system is a mobile platform which is used to perform laser interaction experiments and tests at various national test sites. The trailer based SRSS laser system is generally operated on the United State Air Forcemore » Starfire Optical Range (SOR) at Kirtland Air Force Base (KAFB), New Mexico. The laser is used to perform laser interaction testing inside the laser trailer as well as outside the trailer at target sites located at various distances. In order to protect personnel who work inside the Nominal Hazard Zone (NHZ) from hazardous laser exposures, it was necessary to determine the Maximum Permissible Exposure (MPE) for each laser wavelength (wavelength bands) and calculate the appropriate minimum Optical Density (ODmin) necessary for the laser safety eyewear used by authorized personnel. Also, the Nominal Ocular Hazard Distance (NOHD) and The Extended Ocular Hazard Distance (EOHD) are calculated in order to protect unauthorized personnel who may have violated the boundaries of the control area and might enter into the laser's NHZ for testing outside the trailer. 4Page intentionally left blank« less

40 CFR 49.152 - Definitions.

Code of Federal Regulations, 2014 CFR

2014-07-01

... trailers to house construction management or staff and contractor personnel. Commence construction means... materials, storing of equipment or setting up temporary trailers to house construction management or staff...: AIR QUALITY PLANNING AND MANAGEMENT General Federal Implementation Plan Provisions Federal Minor New...

US EPA SmartWay License Agreement

EPA Pesticide Factsheets

This SmartWay Tractor and Trailer trademark license agreement is for manufacturers who intend to display the SmartWay designated logo (brand) in the interior of eligible trucks and trailers (e.g. having met the SmartWay specifications established by EPA).

75 FR 51521 - Federal Motor Vehicle Safety Standards; Air Brake Systems; Technical Report on the Effectiveness...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-20

... of Antilock Braking Systems in Heavy Truck Tractors and Trailers AGENCY: National Highway Traffic...] in Heavy Truck Tractors and Trailers. DATES: Comments must be received no later than December 20...

Space allowance during commercial long distance transport of cattle in North America.

PubMed

González, L A; Schwartzkopf-Genswein, K S; Bryan, M; Silasi, R; Brown, F

2012-10-01

The objective of the present work was to study space allowance in cattle during commercial long haul transport (≥400 km; n = 6,152 journeys). Surveys, delivered to livestock transport carriers, gathered information on the number, BW, and distribution of cattle by trailer compartment as well as the characteristics of the transport vehicles used. Space allowance (SA; m(2)/animal), allometric coefficient (k = SA / BW(0.6667)), and the percentage of deviation from recommended SA (DRSA; %) in the Canadian Codes of Practice were calculated for each compartment of the trailers. All quad-axle (77%) and tri-axle (23%) cattle trailers were reported with 5 compartments (nose, deck, belly, back, and doghouse). Sixty percent of all animals were carried in the middle compartments (deck and belly), 30% in the rear (back and doghouse), and 10% in the front or nose. Approximately 30% of the journeys required that the cattle be redistributed at the Canada-USA border to comply with different axle weight regulations, and most journeys moved them between the deck and the doghouse. Total loaded weight increased and the number of animals decreased with increasing BW of the animals. space allowance, k-value, and DRSA were least for calves and feeders compared with fat and cull cattle (p < 0.01). Both total loaded weight and number of animals increased with the number of axles in the trailer, being greatest in quad-axle trailers pulled by push tractors, which were most frequently used. Space allowance (k-value) was least in vehicles with greater number of axles and transporting the lightest cattle (i.e., quad-axles trailers transporting calves and feeders). Space allowance, k-value, and variability among journeys were least in the middle compartments (belly and deck), followed by the back, then doghouse and nose compartments of the trailers showing the largest values (p < 0.05). Many factors contributed to the variability in SA such as body size (smaller animals are placed more densely), compartment of the trailer (greater density in belly and deck), and number of axles on the vehicle (greater density with more axles). The present study provides a framework to assess and understand factors affecting SA during commercial long distance transport of cattle. This information is vital in assessing the consequences of changing industry standards, guidelines, recommended values, laws and regulations on animal welfare, the industry, and economics.

Engineering Design Handbook for Air Cleaning for Chemical Demilitarization

DTIC Science & Technology

1978-03-01

so that the housing will be horizontal when supported from a single crane hook . Mounting on skids also provides space for laying drainpipes under the...and mounted on skids to facilitate handling and installation by cranes and forklifts (see figures 4-24 and 4-31). The lifting eyes must be located...environmental conditions prevailing during chemical demil operations. Many filter media cannot withstand acid or caustic fumes. Fiberglass, a conunon constituent

70. VIEW OF FUEL APRON FROM EAST SIDE OF LAUNCH ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

70. VIEW OF FUEL APRON FROM EAST SIDE OF LAUNCH PAD. ROCKET FUEL TANKS ON LEFT; GASEOUS NITROGEN AND HELIUM TANKS IN CENTER; AND A LARGE LIQUID NITROGEN TANK ON RIGHT. SKID 1 FOR GASEOUS NITROGEN TRANSFER AND SKID 5 FOR HELIUM TRANSFER IN THE CENTER RIGHT PORTION OF THE PHOTOGRAPH. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Influence of skid trails and haul roads on understory plant richness and composition in managed forest landscapes in Upper Michigan, USA

Treesearch

David S. Buckley; Thomas R. Crow; Elizabeth A. Nauertz; Kurt E. Schulz

2003-01-01

We evaluated impacts of disturbance in interior haul roads and skid trails on understory vegetation by documenting the areal extent of these features and plant composition along 10 m x 100 m belt transects. Ten belt transects were sampled in each of three comparable northern hardwood forests under even-aged management. These forests were approximately 80 years old and...

Skid resistance performance of asphalt wearing courses with electric arc furnace slag aggregates.

PubMed

Kehagia, Fotini

2009-05-01

Metallurgical slags are by-products of the iron and steel industry and are subdivided into blast furnace slag and steel slag according to the different steel-producing processes. In Greece, slags are mostly produced from steelmaking using the electric arc furnace process, and subsequently are either disposed in a random way or utilized by the cement industry. Steel slag has been recently used, worldwide, as hard aggregates in wearing courses in order to improve the skidding resistance of asphalt pavements. At the Highway Laboratory, Department of Civil Engineering of Aristotle University of Thessaloniki research has been carried out in the field of steel slags, and especially in electric arc furnace (EAF) slag, to evaluate their possible use in highway engineering. In this paper, the recent results of anti-skidding performance of steel slag aggregates in highway pavements are presented.

Composite skid landing gear design investigation

NASA Astrophysics Data System (ADS)

Shrotri, Kshitij

A Composite Skid Landing Gear Design investigation has been conducted. Limit Drop Test as per Federal Aviation Regulations (FAR) Part 27.725 and Crash test as per MIL STD 1290A (AV) were simulated using ABAQUS to evaluate performance of multiple composite fiber-matrix systems. Load factor developed during multiple landing scenarios and energy dissipated during crash were computed. Strength and stiffness based constraints were imposed. Tsai-Wu and LaRC04 physics based failure criteria were used for limit loads. Hashin's damage initiation criteria with Davila-Camanho's energy based damage evolution damage evolution law were used for crash. Initial results indicate that all single-composite skid landing gear may no be feasible due to strength concerns in the cross member bends. Hybridization of multiple composites with elasto-plastic aluminum 7075 showed proof of strength under limit loads. Laminate tailoring for load factor optimization under limit loads was done by parameterization of a single variable fiber orientation angle for multiple laminate families. Tsai-Wu failure criterion was used to impose strength contraints. A quasi-isotropic N = 4 (pi/4) 48 ply IM7/8552 laminate was shown to be the optimal solution with a load failure will be initiated as matrix cracking under compression and fiber kinking under in-plane shear and longitudinal compression. All failures under limit loads being reported in the metal-composite hybrid joint region, the joint was simulated by adhesive bonding and filament winding, separately. Simply adhesive bonding the metal and composite regions does not meet strength requirements. A filament wound metal-composite joint shows proof of strength. Filament wound bolted metal-composite joint shows proof of strength. Filament wound composite bolted to metal cross member radii is the final joining methodology. Finally, crash analysis was conducted as per requirements from MIL STD 1290A (AV). Crash at 42 ft/sec with 1 design gross weight (DGW) lift was simulated using ABAQUS. Plastic and friction energy dissipation in the reference aluminum skid landing gear was compared with plastic, friction and damage energy dissipation in the hybrid composite design. Damage in composites was modeled as progressive damage with Hashin's damage initiation criteria and an energy based damage evolution law. The latter meets requirements of aircraft kinetic energy dissipation up to 20 ft/sec (67.6 kJ) as per MIL STD 1290A (AV). Weight saving possibility of up to 49% over conventional metal skid landing gear is reported. The final design recommended includes Ke49/PEEK skids, 48 ply IM7/8552 (or IM7/PEEK) cross member tapered beams and Al 7075 cross member bend radii, the latter bolted to the filament wound composite-metal tapered beam. Concerns in composite skid landing gear designs, testing requirements and future opportunities are addressed.

View of EPA Farm Sioux silo, facing east. Radsafe trailer ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of EPA Farm Sioux silo, facing east. Rad-safe trailer is to the left - Nevada Test Site, Environmental Protection Agency Farm, Silo Type, Area 15, Yucca Flat, 10-2 Road near Circle Road, Mercury, Nye County, NV

Combating Trafficking in Persons > Home

Science.gov Websites

? Training Combined Course General Awareness Investigative Professionals Additional Resources Contracting Investigative Professionals Training Trailer Investigative Professionals Training Trailer Investigative professionals are one of the first lines of defense in combating human trafficking. CTIP training for

Air flow testing on aerodynamic truck

NASA Technical Reports Server (NTRS)

1975-01-01

After leasing a cab-over tractor-trailer from a Southern California firm, Dryden researchers added sheet metal modifications like those shown here. They rounded the front corners and edges, and placed a smooth fairing on the cab's roofs and sides extending back to the trailer. During the investigation of truck aerodynamics, the techniques honed in flight research proved highly applicable. By closing the gap between the cab and the trailer, for example, researchers discovered a significant reduction in aerodynamic drag, one resulting in 20 to 25 percent less fuel consumption than the standard design. Many truck manufacturers subsequently incorporated similar modifications on their products.

A small stem-loop structure of the Ebola virus trailer is essential for replication and interacts with heat-shock protein A8

PubMed Central

Sztuba-Solinska, Joanna; Diaz, Larissa; Kumar, Mia R.; Kolb, Gaëlle; Wiley, Michael R.; Jozwick, Lucas; Kuhn, Jens H.; Palacios, Gustavo; Radoshitzky, Sheli R.; J. Le Grice, Stuart F.; Johnson, Reed F.

2016-01-01

Ebola virus (EBOV) is a single-stranded negative-sense RNA virus belonging to the Filoviridae family. The leader and trailer non-coding regions of the EBOV genome likely regulate its transcription, replication, and progeny genome packaging. We investigated the cis-acting RNA signals involved in RNA–RNA and RNA–protein interactions that regulate replication of eGFP-encoding EBOV minigenomic RNA and identified heat shock cognate protein family A (HSC70) member 8 (HSPA8) as an EBOV trailer-interacting host protein. Mutational analysis of the trailer HSPA8 binding motif revealed that this interaction is essential for EBOV minigenome replication. Selective 2′-hydroxyl acylation analyzed by primer extension analysis of the secondary structure of the EBOV minigenomic RNA indicates formation of a small stem-loop composed of the HSPA8 motif, a 3′ stem-loop (nucleotides 1868–1890) that is similar to a previously identified structure in the replicative intermediate (RI) RNA and a panhandle domain involving a trailer-to-leader interaction. Results of minigenome assays and an EBOV reverse genetic system rescue support a role for both the panhandle domain and HSPA8 motif 1 in virus replication. PMID:27651462

Precursor-product discrimination by La protein during tRNA metabolism.

PubMed

Bayfield, Mark A; Maraia, Richard J

2009-04-01

La proteins bind pre-tRNAs at their UUU-3'OH ends, facilitating their maturation. Although the mechanism by which La binds pre-tRNA 3' trailers is known, the function of the RNA binding beta-sheet surface of the RNA-recognition motif (RRM1) is unknown. How La dissociates from UUU-3'OH-containing trailers after 3' processing is also unknown. Here we show that La preferentially binds pre-tRNAs over processed tRNAs or 3' trailer products through coupled use of two sites: one on the La motif and another on the RRM1 beta-surface that binds elsewhere on tRNA. Two sites provide stable pre-tRNA binding, whereas the processed tRNA and 3' trailer are released from their single sites relatively fast. RRM1 loop-3 mutations decrease affinity for pre-tRNA and tRNA, but not for the UUU-3'OH trailer, and impair tRNA maturation in vivo. We propose that RRM1 functions in activities that are more complex than UUU-3'OH binding. Accordingly, the RRM1 mutations also impair an RNA chaperone activity of La. The results suggest how La distinguishes precursor from product RNAs, allowing it to recycle onto a new pre-tRNA.

36 CFR 7.43 - Natchez Trace Parkway.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) Trailers. Trailers are permitted when used non-commercially to transport baggage, camping equipment, horses... written permission when transporting people for special recreational or educational purposes. (7) Towed... exceed 55 feet in length. (d) Beer and alcoholic beverages. The possession of beer or any alcoholic...

Study of Aerodynamic Drag Reduction on a Full-Scale Tractor-Trailer

DOT National Transportation Integrated Search

1976-04-01

Aerodynamic drag tests were performed on a tractor-trailer combination using the coast-down method on a smooth, nearly level runway. The tests included an investigation of drag reduction obtained with add-on devices that are commercially available or...

77 FR 37957 - Guizhou Tyre Corporation; Receipt of Petition for Decision of Inconsequential Noncompliance

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-25

...'') has determined that certain Samson and Advance brand ST trailer Tires, do not fully comply with... involved: Affected are approximately 4,291 size ST235/ 85R16/14 ply Samson and Advance brand ST Trailer...

An Analytic Tool to Investigate the Effect of Binder on the Sensitivity of HMX-Based Plastic Bonded Explosives in the Skid Test

DOE Office of Scientific and Technical Information (OSTI.GOV)

Hayden, D. W.

This project will develop an analytical tool to calculate performance of HMX based PBXs in the skid test. The skid-test is used as a means to measure sensitivity for large charges in handling situations. Each series of skid tests requires dozens of drops of large billets. It is proposed that the reaction (or lack of one) of PBXs in the skid test is governed by the mechanical properties of the binder. If true, one might be able to develop an analytical tool to estimate skid test behavior for new PBX formulations. Others over the past 50 years have tried tomore » develop similar models. This project will research and summarize the works of others and couple the work of 3 into an analytical tool that can be run on a PC to calculate drop height of HMX based PBXs. Detonation due to dropping a billet is argued to be a dynamic thermal event. To avoid detonation, the heat created due to friction at impact, must be conducted into the charge or the target faster than the chemical kinetics can create additional energy. The methodology will involve numerically solving the Frank-Kamenetskii equation in one dimension. The analytical problem needs to be bounded in terms of how much heat is introduced to the billet and for how long. Assuming an inelastic collision with no rebound, the billet will be in contact with the target for a short duration determined by the equations of motion. For the purposes of the calculations, it will be assumed that if a detonation is to occur, it will transpire within that time. The surface temperature will be raised according to the friction created using the equations of motion of dropping the billet on a rigid surface. The study will connect the works of Charles Anderson, Alan Randolph, Larry Hatler, Alfonse Popolato, and Charles Mader into a single PC based analytic tool. Anderson's equations of motion will be used to calculate the temperature rise upon impact, the time this temperature is maintained (contact time) will be obtained from the work of Hatler et. al., and the reactive temperature rise will be obtained from Mader's work. Finally, the assessment of when a detonation occurs will be derived from Bowden and Yoffe's thermal explosion theory (hot spot).« less

External Device to Incrementally Skid the Habitat (E-DISH)

NASA Technical Reports Server (NTRS)

Brazell, J. W.; Introne, Steve; Bedell, Lisa; Credle, Ben; Holp, Graham; Ly, Siao; Tait, Terry

1994-01-01

A Mars habitat transport system was designed as part of the NASA Mars exploration program. The transport system, the External Device to Incrementally Skid the Habitat (E - DISH), will be used to transport Mars habitats from their landing sites to the colony base and will be detached after unloading. The system requirements for Mars were calculated and scaled for model purposes. Specific model materials are commonly found and recommendations for materials for the Mars design are included.

Project W-320, 241-C-106 sluicing HVAC calculations, Volume 1

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bailey, J.W.

1998-08-07

This supporting document has been prepared to make the FDNW calculations for Project W-320, readily retrievable. The report contains the following calculations: Exhaust airflow sizing for Tank 241-C-106; Equipment sizing and selection recirculation fan; Sizing high efficiency mist eliminator; Sizing electric heating coil; Equipment sizing and selection of recirculation condenser; Chiller skid system sizing and selection; High efficiency metal filter shielding input and flushing frequency; and Exhaust skid stack sizing and fan sizing.

Vertical Drop Testing and Analysis of the WASP Helicopter Skid Gear

NASA Technical Reports Server (NTRS)

Fuchs, Yvonne T.; Jackson, Karen E.

2008-01-01

Human occupant modeling and injury risk assessment have been identified as areas of research for improved prediction of rotorcraft crashworthiness within the NASA Aeronautics Program's Subsonic Rotary Wing Project. As part of this effort, an experimental program was conducted to assess the impact performance of a skid gear for use on the WASP kit-built helicopter, which is marketed by HeloWerks, Inc. of Hampton, Virginia. Test data from a drop test at an impact velocity of 8.4 feet-per-second were used to assess a finite element model of the skid gear test article. This assessment included human occupant analytic models developed for execution in LS-DYNA. The test article consisted of an aluminum skid gear mounted beneath a steel plate. A seating platform was attached to the upper surface of the steel plate, and two 95th percentile Hybrid III male Aerospace Anthropomorphic Test Devices (ATDs) were seated on the platform and secured using a four-point restraint system. The goal of the test-analysis correlation is to further the understanding of LS-DYNA ATD occupant models and responses in the vertical (or spinal) direction. By correlating human occupant experimental test data for a purely vertical impact with the LS-DYNA occupant responses, improved confidence in the use of these tools and better understanding of the limitations of the automotive-based occupant models for aerospace application can begin to be developed.

Vertical Drop Testing and Analysis of the WASP Helicopter Skid Gear

NASA Technical Reports Server (NTRS)

Fuchs, Yvonne T.; Jackson, Karen E.

2008-01-01

Human occupant modeling and injury risk assessment have been identified as areas of research for improved prediction of rotorcraft crashworthiness within the NASA Aeronautics Program s Subsonic Rotary Wing Project. As part of this effort, an experimental program was conducted to assess the impact performance of a skid gear for use on the WASP kit-built helicopter, which is marketed by HeloWerks, Inc. of Hampton, Virginia. Test data from a drop test at an impact velocity of 8.4 feet-per-second were used to assess a finite element model of the skid gear test article. This assessment included human occupant analytic models developed for execution in LS-DYNA. The test article consisted of an aluminum skid gear mounted beneath a steel plate. A seating platform was attached to the upper surface of the steel plate, and two 95th percentile Hybrid III male Aerospace Anthropomorphic Test Devices (ATDs) were seated on the platform and secured using a four-point restraint system. The goal of the test-analysis correlation is to further the understanding of LS-DYNA ATD occupant models and responses in the vertical (or spinal) direction. By correlating human occupant experimental test data for a purely vertical impact with the LS-DYNA occupant responses, improved confidence in the use of these tools and better understanding of the limitations of the automotive-based occupant models for aerospace application can begin to be developed.

29 CFR 1910.103 - Hydrogen.

Code of Federal Regulations, 2014 CFR

2014-07-01

..., trailers, mobile supply trucks, or tank cars. (ii) Liquefied hydrogen systems. (a) Paragraph (c) of this... refilling portable containers, trailers, mobile supply trucks, or tank cars. (b) Gaseous hydrogen systems—(1... be located above ground. (c) Systems shall not be located beneath electric power lines. (d) Systems...

U10 : Trusted Truck(R) II (phase B).

DOT National Transportation Integrated Search

2009-01-01

Phase B of the Trusted Truck II project built on the system developed in Phase A (or Year 1). For the implementation portion of the project, systems were added to the trailer to provide additional diagnostic trailer data that can be sent to the TTM...

29 CFR 1910.103 - Hydrogen.

Code of Federal Regulations, 2010 CFR

2010-07-01

..., trailers, mobile supply trucks, or tank cars. (ii) Liquefied hydrogen systems. (a) Paragraph (c) of this... refilling portable containers, trailers, mobile supply trucks, or tank cars. (b) Gaseous hydrogen systems—(1... be located above ground. (c) Systems shall not be located beneath electric power lines. (d) Systems...

Characterization of the High-Speed-Stage Bearing Skidding of Wind Turbine Gearboxes Induced by Dynamic Electricity Grid Events

DOE Office of Scientific and Technical Information (OSTI.GOV)

Helsen, Jan; Guillaume, Patrick; Guo, Yi

Bearing behavior is an important factor for wind turbine drivetrain reliability. Extreme loads and dynamic excitations pose challenges to the bearing design and therefore its performance. Excessive skidding of the bearing rollers should be avoided because it can cause scuffing failures. Excitations coming from wind and the electricity grid can subject the drivetrain to fluctuating torque and nontorque loads. Wind-induced excitations have been investigated predominantly in literature. However, modern wind turbines are subjected more and more to grid-induced loads because of stricter electricity grid regulations. For example, during fault-ride-through events, turbines are required to stay connected for a longer periodmore » of time during the grid failure. This work investigates the influence of electrically induced excitations on the skidding behaviour of the tapered roller bearings on the high-speed stage of a wind turbine gearbox. This skidding behaviour during dynamic events is described as a potential bearing failure initiator by many researchers; however, only limited full-scale dynamic testing is documented. Therefore, a dedicated gridloss-type event is defined in the paper and conducted in a dynamometer test on a full-scale wind turbine nacelle. During the event, a complete electricity grid failure is simulated while the turbine is at rated speed and predefined torque levels. Particular focus is on the characterization of the high-speed shaft tapered roller bearing slip behavior. Strain-gauge bridges in grooves along the circumference of the outer ring are used to characterize the bearing load zone in detail. It is shown that during the torque reversals of the transient event, roller slip can be induced. This indicates the potential of the applied load case to go beyond the preload of the tapered roller bearing. Furthermore, the relation between the applied torque and skidding level is studied.« less

Characterization of the High-Speed-Stage Bearing Skidding of Wind Turbine Gearboxes Induced by Dynamic Electricity Grid Events: Preprint

DOE Office of Scientific and Technical Information (OSTI.GOV)

Helsen, Jan; Guillaume, Patrick; Guo, Yi

Bearing behavior is an important factor for wind turbine drivetrain reliability. Extreme loads and dynamic excitations pose challenges to the bearing design and therefore its performance. Excessive skidding of the bearing rollers should be avoided because it can cause scuffing failures. Excitations coming from wind and the electricity grid can subject the drivetrain to fluctuating torque and nontorque loads. Wind-induced excitations have been investigated predominantly in literature. However, modern wind turbines are subjected more and more to grid-induced loads because of stricter electricity grid regulations. For example, during fault-ride-through events, turbines are required to stay connected for a longer periodmore » of time during the grid failure. This work investigates the influence of electrically induced excitations on the skidding behaviour of the tapered roller bearings on the high-speed stage of a wind turbine gearbox. This skidding behaviour during dynamic events is described as a potential bearing failure initiator by many researchers; however, only limited full-scale dynamic testing is documented. Therefore, a dedicated gridloss-type event is defined in the paper and conducted in a dynamometer test on a full-scale wind turbine nacelle. During the event, a complete electricity grid failure is simulated while the turbine is at rated speed and predefined torque levels. Particular focus is on the characterization of the high-speed shaft tapered roller bearing slip behavior. Strain-gauge bridges in grooves along the circumference of the outer ring are used to characterize the bearing load zone in detail. It is shown that during the torque reversals of the transient event, roller slip can be induced. This indicates the potential of the applied load case to go beyond the preload of the tapered roller bearing. Furthermore, the relation between the applied torque and skidding level is studied.« less

NHTSA's heavy duty vehicle brake research program report number 11 : evaluation of stopping performance of trailer antilock brake systems

DOT National Transportation Integrated Search

1997-04-01

In order to better understand the functioning of antilock brake systems on pneumatically braked trailers, a series of tests were conducted to evaluate different ABS control strategies, performance variations among systems supplied by different manufa...

Space-Inspired Trailers Encourage Exploration on Earth

NASA Technical Reports Server (NTRS)

2013-01-01

Architect Garret Finney joined Johnson Space Center's Habitability Design Center to work on creating comfortable, efficiently designed crew quarters for the ISS. Drawing directly on that experience, Finney founded Houston-based Cricket and set about creating unique, versatile recreational trailers that incorporate space habitat principles and features.

GEMINI-TITAN (GT)-7 - PRELAUNCH ACTIVITY - COMMAND PILOT (LEAVES SUITING TRAILER) - CAPE

NASA Image and Video Library

1965-12-04

S65-59932 (4 Dec. 1965) --- Prime crew for the Gemini-7 spaceflight astronauts James A. Lovell Jr. (front), pilot, and Frank Borman, command pilot, leave the suiting trailer at Launch Complex 16 during prelaunch countdown at Cape Kennedy, Florida. Photo credit: NASA

A small stem-loop structure of the Ebola virus trailer is essential for replication and interacts with heat-shock protein A8.

PubMed

Sztuba-Solinska, Joanna; Diaz, Larissa; Kumar, Mia R; Kolb, Gaëlle; Wiley, Michael R; Jozwick, Lucas; Kuhn, Jens H; Palacios, Gustavo; Radoshitzky, Sheli R; J Le Grice, Stuart F; Johnson, Reed F

2016-11-16

Ebola virus (EBOV) is a single-stranded negative-sense RNA virus belonging to the Filoviridae family. The leader and trailer non-coding regions of the EBOV genome likely regulate its transcription, replication, and progeny genome packaging. We investigated the cis-acting RNA signals involved in RNA-RNA and RNA-protein interactions that regulate replication of eGFP-encoding EBOV minigenomic RNA and identified heat shock cognate protein family A (HSC70) member 8 (HSPA8) as an EBOV trailer-interacting host protein. Mutational analysis of the trailer HSPA8 binding motif revealed that this interaction is essential for EBOV minigenome replication. Selective 2'-hydroxyl acylation analyzed by primer extension analysis of the secondary structure of the EBOV minigenomic RNA indicates formation of a small stem-loop composed of the HSPA8 motif, a 3' stem-loop (nucleotides 1868-1890) that is similar to a previously identified structure in the replicative intermediate (RI) RNA and a panhandle domain involving a trailer-to-leader interaction. Results of minigenome assays and an EBOV reverse genetic system rescue support a role for both the panhandle domain and HSPA8 motif 1 in virus replication. Published by Oxford University Press on behalf of Nucleic Acids Research 2016. This work is written by (a) US Government employee(s) and is in the public domain in the US.

A Comparative Study of Soviet versus Western Helicopters. Part 2. Evaluation of Weight, Maintainability, and Design Aspects of Major Components

DTIC Science & Technology

1983-03-01

transmnission ratingob gearbox ult uldiatc gOr tail-rotor gearbox Vr vertical tailh hub w wheelhr horizontal tail w/ wheel -type landing-gear legslob...depends on ýhe type of landing gear (skid, fixed- wheel , or retractable). The RTL approach takes into consideration not only gross weight, but also...depending on the helicopter configuration (single- rotor, tandem, or side-by-side), and the type of landing gear ( wheel or skid). For a single-rotor

Flightfax - Army Aviation Risk-Management Information. Volume 25, Number 11, August 1997. Snow

DTIC Science & Technology

1997-08-01

but why haven’t Loach that would ensure our surviving a multiple- you been acknowledging the radio calls?" A quick wire strike. check confirmed that...helicopter upright with only the collective and Loach on post with skid shoes, the skid cleats would pedals. have snagged the middle wire and flipped...is more cost effective to overhaul until because masking violated FAA Mr. Ken Muzzo, DSN 490-2257 (314-260- the retirement life is reached. The

Development of Minimum Physical Fitness Standards for the Canadian Armed Forces. Phase 3

DTIC Science & Technology

1988-03-01

while mounting stairs more than tripled their energy expenditures . Similarly, Astrand and Rodahl (1977) determined that continuous stair climbing...evacuation tasks were restructured to be one-person tasks (i.e., wheels on the land stretcher; a push-skid for the sea evacuation stairs stretcher). Other...kg stoker stretcher 12.5 m to the base of a flight of stairs . The subject then pushed a skid carrying one subject’s share of the mass up and down a

Tire-to-Surface Friction-Coefficient Measurements with a C-123B Airplane on Various Runway Surfaces

NASA Technical Reports Server (NTRS)

Sawyer, Richard H.; Kolnick, Joseph J.

1959-01-01

An investigation was conducted to obtain information on the tire-to-surface friction coefficients available in aircraft braking during the landing run. The tests were made with a C-123B airplane on both wet and dry concrete and bituminous pavements and on snow-covered and ice surfaces at speeds from 12 to 115 knots. Measurements were made of the maximum (incipient skidding) friction coefficient, the full-skidding (locked wheel) friction coefficient, and the wheel slip ratio during braking.

49 CFR 393.207 - Suspension systems.

Code of Federal Regulations, 2010 CFR

2010-10-01

... bar. No torsion bar or torsion bar suspension shall be cracked or broken. (f) Air suspensions. The air... the controls are either located on the trailer, or the power unit and trailer combination are not....207 Suspension systems. (a) Axles. No axle positioning part shall be cracked, broken, loose or missing...

An Automated Sample Divider for Farmers Stock Peanuts

USDA-ARS?s Scientific Manuscript database

In-shell peanuts are harvested, loaded into drying trailers, and delivered to a central facility where they are dried to a moisture content safe for long term storage, sampled, graded, then unloaded into bulk storage. Drying trailers have capacities ranging from five to twenty-five tons of dry farme...

An automated sample divider for farmers stock peanuts

USDA-ARS?s Scientific Manuscript database

In-shell peanuts are harvested, loaded into drying trailers, and delivered to a central facility where they are dried to a moisture content safe for long term storage, sampled, graded, then unloaded into bulk storage. Drying trailers have capacities ranging from five to twenty-five tons of dry farme...

Fuel Consumption of Tractor-Trailer Trucks as Affected by Speed Limit and Payload Weight

DOT National Transportation Integrated Search

1975-11-01

The effect of speed limit and payload weight on fuel consumption was determined in tests of tractor-trailer rigs. Two virtually identical vehicles were used, one loaded with a 28,000 lb payload and the other carrying 42,000 lbs; each was driven over ...

50 CFR 86.118 - What does this survey instrument include?

Code of Federal Regulations, 2011 CFR

2011-10-01

... THE INTERIOR (CONTINUED) FINANCIAL ASSISTANCE-WILDLIFE SPORT FISH RESTORATION PROGRAM BOATING... boat owners. Part B is for trailerable or “car-top” boat owners. Part C is for State agency and non... and non-State providers of access sites for trailerable or “car-top” boats. (b) Follow these...

50 CFR 86.118 - What does this survey instrument include?

Code of Federal Regulations, 2012 CFR

2012-10-01

... THE INTERIOR (CONTINUED) FINANCIAL ASSISTANCE-WILDLIFE SPORT FISH RESTORATION PROGRAM BOATING... boat owners. Part B is for trailerable or “car-top” boat owners. Part C is for State agency and non... and non-State providers of access sites for trailerable or “car-top” boats. (b) Follow these...

50 CFR 86.118 - What does this survey instrument include?

Code of Federal Regulations, 2010 CFR

2010-10-01

... THE INTERIOR (CONTINUED) FINANCIAL ASSISTANCE-WILDLIFE SPORT FISH RESTORATION PROGRAM BOATING... boat owners. Part B is for trailerable or “car-top” boat owners. Part C is for State agency and non... and non-State providers of access sites for trailerable or “car-top” boats. (b) Follow these...

26 CFR 1.1031(a)-2 - Additional rules for exchanges of personal property.

Code of Federal Regulations, 2010 CFR

2010-04-01

... TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Common Nontaxable Exchanges § 1.1031(a)-2...), (viii) Heavy general purpose trucks (asset class 00.242), (ix) Railroad cars and locomotives, except...-road (asset class 00.26), (xi) Trailers and trailer-mounted containers (asset class 00.27), (xii...

Pathways of Youth Development in a Rural Trailer Park

ERIC Educational Resources Information Center

MacTavish, Katherine A.; Salamon, Sonya

2006-01-01

Limited empirical documentation exists for the developmental pathways available to "rural" youth growing up in low-resource community settings. Drawing on ethnographic data, this article examines the developmental pathways experienced by youth in a rural trailer park. Findings reveal how various factors, some inherent to working poor class status…

Variation of Farmer Stock Grade Factors in Semi-Drying Trailers

USDA-ARS?s Scientific Manuscript database

Peanuts are increasingly being loaded into flat bottom semi-drying trailers in the field and transported to peanut buying points for curing, grading, and marketing. Conveyances in excess of 15 t are probed 15 times using the pneumatic sampler requiring considerable time for probing and reducing the...

Aerodynamic forces on freight trains : volume 1. wind tunnel tests of containers and trailers on flatcars

DOT National Transportation Integrated Search

1976-12-01

The aerodynamic forces on trailers and containers on flatcars have been measured in wind tunnel tests. The forces were measured on the central car of a five-car train consisting of a locomotive, three flatcars with various loadings and a boxcar. Test...

26 CFR 48.4041-8 - Definitions.

Code of Federal Regulations, 2011 CFR

2011-04-01

... if it is (A) specially designed for the primary function of transporting a particular type of load... vehicle” means any self-propelled vehicle, or any trailer or semi-trailer, designed to perform a function of transporting a load over highways, whether or not also designed to perform other functions, but...

26 CFR 48.4041-8 - Definitions.

Code of Federal Regulations, 2013 CFR

2013-04-01

... if it is (A) specially designed for the primary function of transporting a particular type of load... vehicle” means any self-propelled vehicle, or any trailer or semi-trailer, designed to perform a function of transporting a load over highways, whether or not also designed to perform other functions, but...

26 CFR 48.4041-8 - Definitions.

Code of Federal Regulations, 2010 CFR

2010-04-01

... if it is (A) specially designed for the primary function of transporting a particular type of load... vehicle” means any self-propelled vehicle, or any trailer or semi-trailer, designed to perform a function of transporting a load over highways, whether or not also designed to perform other functions, but...

26 CFR 48.4041-8 - Definitions.

Code of Federal Regulations, 2012 CFR

2012-04-01

... if it is (A) specially designed for the primary function of transporting a particular type of load... vehicle” means any self-propelled vehicle, or any trailer or semi-trailer, designed to perform a function of transporting a load over highways, whether or not also designed to perform other functions, but...

49 CFR 178.337-3 - Structural integrity.

Code of Federal Regulations, 2013 CFR

2013-10-01

... each case, the forces applied must be 0.35 times the vertical reaction at the suspension assembly... assembly of a trailer; or the horizontal pivot of the upper coupler (fifth wheel) or turntable; or... reaction at the suspension assembly of a trailer; or the horizontal pivot of the upper coupler (fifth wheel...

49 CFR 178.345-3 - Structural integrity.

Code of Federal Regulations, 2014 CFR

2014-10-01

... accelerative force equal to 0.35 times the vertical reaction at the suspension assembly of a trailer; or the... the suspension assembly of a trailer, and the horizontal pivot of the upper coupler (fifth wheel) or... normal operating accelerative force equal to 0.35 times the vertical reaction at the suspension assembly...

49 CFR 178.345-3 - Structural integrity.

Code of Federal Regulations, 2012 CFR

2012-10-01

... accelerative force equal to 0.35 times the vertical reaction at the suspension assembly of a trailer; or the... the suspension assembly of a trailer, and the horizontal pivot of the upper coupler (fifth wheel) or... normal operating accelerative force equal to 0.35 times the vertical reaction at the suspension assembly...

49 CFR 178.337-3 - Structural integrity.

Code of Federal Regulations, 2012 CFR

2012-10-01

... each case, the forces applied must be 0.35 times the vertical reaction at the suspension assembly... assembly of a trailer; or the horizontal pivot of the upper coupler (fifth wheel) or turntable; or... reaction at the suspension assembly of a trailer; or the horizontal pivot of the upper coupler (fifth wheel...

49 CFR 178.337-3 - Structural integrity.

Code of Federal Regulations, 2014 CFR

2014-10-01

... each case, the forces applied must be 0.35 times the vertical reaction at the suspension assembly... assembly of a trailer; or the horizontal pivot of the upper coupler (fifth wheel) or turntable; or... reaction at the suspension assembly of a trailer; or the horizontal pivot of the upper coupler (fifth wheel...

49 CFR 178.345-3 - Structural integrity.

Code of Federal Regulations, 2013 CFR

2013-10-01

... accelerative force equal to 0.35 times the vertical reaction at the suspension assembly of a trailer; or the... the suspension assembly of a trailer, and the horizontal pivot of the upper coupler (fifth wheel) or... normal operating accelerative force equal to 0.35 times the vertical reaction at the suspension assembly...

Slip-based terrain estimation with a skid-steer vehicle

NASA Astrophysics Data System (ADS)

Reina, Giulio; Galati, Rocco

2016-10-01

In this paper, a novel approach for online terrain characterisation is presented using a skid-steer vehicle. In the context of this research, terrain characterisation refers to the estimation of physical parameters that affects the terrain ability to support vehicular motion. These parameters are inferred from the modelling of the kinematic and dynamic behaviour of a skid-steer vehicle that reveals the underlying relationships governing the vehicle-terrain interaction. The concept of slip track is introduced as a measure of the slippage experienced by the vehicle during turning motion. The proposed terrain estimation system includes common onboard sensors, that is, wheel encoders, electrical current sensors and yaw rate gyroscope. Using these components, the system can characterise terrain online during normal vehicle operations. Experimental results obtained from different surfaces are presented to validate the system in the field showing its effectiveness and potential benefits to implement adaptive driving assistance systems or to automatically update the parameters of onboard control and planning algorithms.

The Citizen Sky Planetarium Trailer

NASA Astrophysics Data System (ADS)

Turner, Rebecca; Price, A.; Wyatt, R.

2011-05-01

Citizen Sky is a multi-year, citizen science project focusing on the bright variable star, epsilon Aurigae. We have developed a six-minute video presentation describing eclipsing binary stars, light curves, and the Citizen Sky project. Designed like a short movie trailer, the video can be shown at planetariums before their regular, feature shows or integrated into a longer presentation. The trailer is available in a wide range of formats for viewing on laptops all the way up to state-of-the-art planetariums. The show is narrated by Timothy Ferris and was produced by the Morrison Planetarium and Visualization Studio at the California Academy of Sciences. This project has been made possible by the National Science Foundation.

The Citizen Sky Planetarium Trailer

NASA Astrophysics Data System (ADS)

Turner, R.; Price, A.; Wyatt, R.

2012-06-01

(Abstract only) Citizen Sky is a multi-year, citizen science project focusing on the bright variable star e Aurigae. We have developed a six-minute video presentation describing eclipsing binary stars, light curves, and the Citizen Sky project. Designed like a short movie trailer, the video can be shown at planetariums before their regular, feature shows or integrated into a longer presentation. The trailer is available in a wide range of formats for viewing on laptops all the way up to state-of-the-art planetariums. The show is narrated by Timothy Ferris and was produced by the Morrison Planetarium and Visualization Studio at the California Academy of Sciences. This project has been made possible by the National Science Foundation.

Tractor Trailer Driver's Training Programs. Performance Report.

ERIC Educational Resources Information Center

New Hampshire Vocational Technical Coll., Nashua.

This document describes a project to develop a 320-hour tractor trailer driver training program and a 20-hour commercial driver licensing upgrade training program. Of 34 graduates from the training program, 28 secured employment in the trucking industry. From August 1989 to June 1990, 725 students were trained in the upgrade training program with…

49 CFR 393.49 - Control valves for brakes.

Code of Federal Regulations, 2010 CFR

2010-10-01

..., which is equipped with power brakes, must have the braking system so arranged that one application valve must when activated cause all of the service brakes on the motor vehicle or combination motor vehicle... with an additional valve to be used to operate the brakes on a trailer or trailers or as required for...

Collision loads on bridge piers : phase 2, report of guidelines for designing bridge piers and abutments for vehicle collisions

DOT National Transportation Integrated Search

2011-03-01

An instrumented, simulated bridge pier was constructed, and two full-scale collisions with an : 80,000-lb van-type tractor-trailer were performed on it. The trailer was ballasted with bags of sand on : pallets. The simulated pier was 36 inches in dia...

50 CFR 86.118 - What does this survey instrument include?

Code of Federal Regulations, 2014 CFR

2014-10-01

... THE INTERIOR (CONTINUED) FINANCIAL ASSISTANCE-WILDLIFE AND SPORT FISH RESTORATION PROGRAM BOATING... boat owners. Part B is for trailerable or “car-top” boat owners. Part C is for State agency and non... and non-State providers of access sites for trailerable or “car-top” boats. (b) Follow these...

50 CFR 86.118 - What does this survey instrument include?

Code of Federal Regulations, 2013 CFR

2013-10-01

... THE INTERIOR (CONTINUED) FINANCIAL ASSISTANCE-WILDLIFE AND SPORT FISH RESTORATION PROGRAM BOATING... boat owners. Part B is for trailerable or “car-top” boat owners. Part C is for State agency and non... and non-State providers of access sites for trailerable or “car-top” boats. (b) Follow these...

ARC-2010-ACD10-0020-023

NASA Image and Video Library

2010-02-03

Lawrence Livermore National Labs (LLNL), Navistar and the Department of Energy conduct tests in the NASA Ames National Full-scale Aerodynamic Complex 80x120_foot wind tunnel. The LLNL project is aimed at aerodynamic truck and trailer devices that can reduce fuel consumption at highway speed by 10 percent. Trailer being lifted into the tunnel.

75 FR 44002 - Agency Information Collection Activities: Submission for OMB Review; Comment Request, OMB No...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-27

...) Cause of Loss and Subrogation Report; 086-0- 17 (formerly 81-96) Manufactured (Mobile) Home/Travel Trailer Worksheet; 086-0-18 (formerly 81-96A) Manufactured (Mobile) Home/Travel Trailer Worksheet... collection, the categories of respondents, the estimated burden (i.e., the time, effort and resources used by...

15. Photocopy of drawing of battery control trailer from 'Procedures ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. Photocopy of drawing of battery control trailer from 'Procedures and Drills for the NIKE Ajax System,' Department of the Army Field Manual, FM-44-80 from Institute for Military History, Carlisle Barracks, Carlisle, PA, 1956 - NIKE Missile Battery PR-79, East Windsor Road south of State Route 101, Foster, Providence County, RI

29 CFR 1917.44 - General rules applicable to vehicles. 4

Code of Federal Regulations, 2012 CFR

2012-07-01

... shall first be deflated by valve core removal; and (ix) Before assembly, wheel components shall be... outside the frame of the device for any wheel position within the device. When the wheel assembly is... trailer road wheels prior to disconnection of the trailer and until braking is again provided. Section 49...

29 CFR 1917.44 - General rules applicable to vehicles. 4

Code of Federal Regulations, 2013 CFR

2013-07-01

... shall first be deflated by valve core removal; and (ix) Before assembly, wheel components shall be... outside the frame of the device for any wheel position within the device. When the wheel assembly is... trailer road wheels prior to disconnection of the trailer and until braking is again provided. Section 49...

29 CFR 1917.44 - General rules applicable to vehicles. 4

Code of Federal Regulations, 2014 CFR

2014-07-01

... shall first be deflated by valve core removal; and (ix) Before assembly, wheel components shall be... outside the frame of the device for any wheel position within the device. When the wheel assembly is... trailer road wheels prior to disconnection of the trailer and until braking is again provided. Section 49...

A robust nonlinear skid-steering control design applied to the MULE (6x6) unmanned ground vehicle

NASA Astrophysics Data System (ADS)

Kaloust, Joseph

2006-05-01

The paper presents a robust nonlinear skid-steering control design concept. The control concept is based on the recursive/backstepping control design technique and is capable of compensating for uncertainties associated with sensor noise measurements and/or system dynamic state uncertainties. The objective of this control design is to demonstrate the performance of the nonlinear controller under uncertainty associate with road traction (rough off-road and on-road terrain). The MULE vehicle is used in the simulation modeling and results.

Application of boron/epoxy reinforced aluminum stringers and boron/epoxy skid gear for the CH54B helicopter tail cone. Phase 2: Fabrication, inspection and flight test

NASA Technical Reports Server (NTRS)

Welge, R. T.

1972-01-01

A CH-54B Skycrane helicopter was fabricated with boron/epoxy reinforced stringers in the tail cone and boron/epoxy tubes in the tail skid. The fabrication of the tail cone was made with conventional tooling, production shop personnel, and no major problems. The flight test program includes a stress and vibration survey using strain gages and vibration transducers located in critical areas. The program to inspect and monitor the reliability of the components is discussed.

Quantitative Estimate of the Relation Between Rolling Resistance on Fuel Consumption of Class 8 Tractor Trailers Using Both New and Retreaded Tires (SAE Paper 2014-01-2425)

EPA Science Inventory

Road tests of class 8 tractor trailers were conducted by the US Environmental Protection Agency on new and retreaded tires of varying rolling resistance in order to provide estimates of the quantitative relationship between rolling resistance and fuel consumption.

49 CFR 1242.44 - Trucks, trailers, and containers (revenue service) and floating equipment (revenue service...

Code of Federal Regulations, 2010 CFR

2010-10-01

...) and floating equipment (revenue service) (accounts XX-23-43 and XX-23-44). 1242.44 Section 1242.44... Trucks, trailers, and containers (revenue service) and floating equipment (revenue service) (accounts XX-23-43 and XX-23-44). These accounts pertain solely to freight service and contain no common expenses...

49 CFR 238.405 - Longitudinal static compressive strength.

Code of Federal Regulations, 2012 CFR

2012-10-01

... crash refuge for crewmembers occupying the cab of a power car, the underframe of the cab of a power car... volumes of a power car or a trailer car designed to crush as part of the crash energy management design...) The underframe of the occupied volume of each trailer car shall resist a minimum longitudinal static...

49 CFR 238.405 - Longitudinal static compressive strength.

Code of Federal Regulations, 2014 CFR

2014-10-01

... crash refuge for crewmembers occupying the cab of a power car, the underframe of the cab of a power car... volumes of a power car or a trailer car designed to crush as part of the crash energy management design...) The underframe of the occupied volume of each trailer car shall resist a minimum longitudinal static...

49 CFR 238.405 - Longitudinal static compressive strength.

Code of Federal Regulations, 2013 CFR

2013-10-01

... crash refuge for crewmembers occupying the cab of a power car, the underframe of the cab of a power car... volumes of a power car or a trailer car designed to crush as part of the crash energy management design...) The underframe of the occupied volume of each trailer car shall resist a minimum longitudinal static...

The Mobile Educational Trailer Unit in Outdoor Teaching.

ERIC Educational Resources Information Center

Rillo, Thomas J.

The concept of achieving mobility for outdoor teaching using a small mobile educational unit and the techniques of facilitating the mobility of equipment and supplies are discussed in this article. A small trailer unit can be used to enrich the learning experiences of students. Since the mobile educational unit is adaptable, it can be used as a…

41 CFR 102-34.100 - Where is motor vehicle identification displayed?

Code of Federal Regulations, 2010 CFR

2010-07-01

... Government motor vehicles may display motor vehicle identification on a decal in the rear window, or centered on both front doors if the vehicle is without a rear window, or where identification on the rear window would not be easily seen. (b) For trailers, on both sides of the front quarter of the trailer in a...

78 FR 16042 - Beall Corporation; Receipt of Petition for Renewal of Temporary Exemption From FMVSS No. 224

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-13

.... Exempted manufacturers seeking renewal must bear in mind that the agency is directed to consider financial... Pioneer Truckweld operation manufactures dump body trailers. In a Federal Register document dated August... FMVSS No. 224 for dump body trailers.\\3\\ The exemption was granted for a period from the date of...

Keeping Students Safe: Introducing the Monolithic Dome

ERIC Educational Resources Information Center

Lanham, Carol

2009-01-01

The tiny town of Niangua, Missouri, made national headlines in 2008 when a rare cluster of winter tornadoes tore across the state on an unseasonably warm January night. The twisters killed a Niangua woman in her trailer home and destroyed numerous other structures. News photos of the trailer debris were a sobering reminder of the vulnerability of…

Review of modern methods for continuous friction measurement on airfield pavements

NASA Astrophysics Data System (ADS)

Iwanowski, Paweł; Blacha, Krzysztof; Wesołowski, Mariusz

2018-05-01

The safety of traffic, including both road and air traffic on a ground manoeuvre area, depends on many factors. These mainly include the anti-slip properties of a road or airfield pavement on which the traffic takes place. The basic pavement parameter that determines its characteristics in terms of anti-slip properties is the skid resistance, which constitutes the ratio of the wheel downforce and the friction on the contact surface. There are currently many devices for continuous measurement of the skid resistance (Continuous Friction-Measuring Equipment - CFME) around the world. Most of them, in principle, do not vary much from one another. Most of the devices measure the measuring wheel’s downforce on the pavement and the friction on the wheel-pavement contact surface. The skid resistance is the result of this measurement. The devices vary in many aspects, such as the type and size of the used measuring tyre, pavement-wheel slip or tyre pressure. This does not mean that the results obtained from various devices mbe directly compared. On the other hand, each device allows determining the pavement’s anti-slip conditions in terms of the requirements specified for the given type of devices, thereby enabling pavement classification in these terms. The classification allows for comparing the results obtained from various measuring devices. The paper presents an overview of equipment used in Poland and around the world to measure the skid resistance on airfield pavements. The authors draw attention to the requirements for pavements in terms of their roughness, with division into road and airfield pavements.

Analysis and Experimental Kinematics of a Skid-Steering Wheeled Robot Based on a Laser Scanner Sensor

PubMed Central

Wang, Tianmiao; Wu, Yao; Liang, Jianhong; Han, Chenhao; Chen, Jiao; Zhao, Qiteng

2015-01-01

Skid-steering mobile robots are widely used because of their simple mechanism and robustness. However, due to the complex wheel-ground interactions and the kinematic constraints, it is a challenge to understand the kinematics and dynamics of such a robotic platform. In this paper, we develop an analysis and experimental kinematic scheme for a skid-steering wheeled vehicle based-on a laser scanner sensor. The kinematics model is established based on the boundedness of the instantaneous centers of rotation (ICR) of treads on the 2D motion plane. The kinematic parameters (the ICR coefficient χ, the path curvature variable λ and robot speed v), including the effect of vehicle dynamics, are introduced to describe the kinematics model. Then, an exact but costly dynamic model is used and the simulation of this model’s stationary response for the vehicle shows a qualitative relationship for the specified parameters χ and λ. Moreover, the parameters of the kinematic model are determined based-on a laser scanner localization experimental analysis method with a skid-steering robotic platform, Pioneer P3-AT. The relationship between the ICR coefficient χ and two physical factors is studied, i.e., the radius of the path curvature λ and the robot speed v. An empirical function-based relationship between the ICR coefficient of the robot and the path parameters is derived. To validate the obtained results, it is empirically demonstrated that the proposed kinematics model significantly improves the dead-reckoning performance of this skid–steering robot. PMID:25919370

The identification and repair of anomalous measurements in the measurement of big diameter based on rolling-wheel method

NASA Astrophysics Data System (ADS)

Chen, Haiou; Yu, Xiaofen

2011-05-01

Rolling-wheel method is an effective way of measuring big diameter. After amending the temperature error and pressure error, the uncertainty of measurement can not be φ =5um/m stably because of the influence of skid. The traditional method of identifying skid loses sight of the influences of the unstable motor speed, the appearance form error and the eccentric of installation of the big axis and rolling wheel and so on, so the method has its limitation. In this paper, a new method of multiple identification and repair is introduced, namely n diameters are measured and Chauvenet standard is used for identifying the anomalous measurements one by one, and then the average value of the remaining data is used for repairing identified anomalous measurements, and the next round identification and repair is carried out until the accuracy requirement of the measurement is satisfied. The result of experiments indicates that the method can identify anomalous measurements whose offsets caused by the skid are greater than 0.2φ , and the uncertainty of measurement has improved substantially.

Coal combine

DOE Office of Scientific and Technical Information (OSTI.GOV)

Krutki, M.; Olender, K.; Sedlaczek, J.

1981-03-24

The invention solves the problem of eliminating the transfer of the combine weight onto a conveyor through a chain instead of through a railing, in the combines which are advanced by means of a link chain meshing with a rack fixed alongside of the conveyor. To this end the slide skid (7) forcing the chain (1) to mesh with the rack (8) is provided with a tubular slipper (10). The tubular slipper (10) encloses a railing (11) situated in the gates of the conveyor (9) close to the rack (8). The tubular slipper (10) is mounted on a cranked axlemore » (12). The cranked axle (12) has - on the end of the pin embedded in the slide skid (7) a splined tip (16) embedded in a grooved hole (17) which has a common geometrical axis (15) with the pin of the cranked axle (12), the said pin being embedded in the slide skid (7). The tubular slipper (10) mounted on the pin (14) of the cranked axle (12) is protected against slipping off into the tubular slipper (10).« less

Thermodynamic Analysis on of Skid-Mounted Coal-bed Methane Liquefaction Device using Cryogenic Turbo-Expander

NASA Astrophysics Data System (ADS)

Chen, Shuangtao; Niu, Lu; Zeng, Qiang; Li, Xiaojiang; Lou, Fang; Chen, Liang; Hou, Yu

2017-12-01

Coal-bed methane (CBM) reserves are rich in Sinkiang of China, and liquefaction is a critical step for the CBM exploration and utilization. Different from other CBM gas fields in China, CBM distribution in Sinkiang is widespread but scattered, and the pressure, flow-rate and nitrogen content of CBM feed vary significantly. The skid-mounted liquefaction device is suggested as an efficient and economical way to recover methane. Turbo-expander is one of the most important parts which generates the cooling capacity for the cryogenic liquefaction system. Using turbo-expander, more cooling capacity and higher liquefied fraction can be achieved. In this study, skid-mounted CBM liquefaction processes based on Claude cycle are established. Cryogenic turbo-expander with high expansion ratio is employed to improve the efficiency of CBM liquefaction process. The unit power consumption per liquefaction mole flow-rate for CBM feed gas is used as the object function for process optimization, compressor discharge pressure, flow ratio of feed gas to turbo-expander and nitrogen friction are analyzed, and optimum operation range of the liquefaction processes are obtained.

Video Book Trailers: Coming to a Library Near You! Spotlight Feature

ERIC Educational Resources Information Center

Dopke-Wilson, MariRae

2009-01-01

This article features two library media specialists who discovered a way to motivate high school students to read. When most people go to the movies, the "coming attractions" or movie trailers are as anticipated as the popcorn! This Americana movie tradition hooks people again and again on what they will come back to see next. So, it's no surprise…

8. VIEW, LOOKING NORTHEAST, FROM THE T371 TRAILERS. IN THE ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. VIEW, LOOKING NORTHEAST, FROM THE T371 TRAILERS. IN THE FOREGROUND IS BUILDING 371, BUILT IN 1981 TO REPLACE BUILDING 771 FOR PLUTONIUM RECOVERY OPERATIONS. IN THE BACKGROUND, TO THE EAST OF BUILDING 371, ARE THE 700 - AREA BUILDINGS, PLUTONIUM OPERATIONS. - Rocky Flats Plant, Bounded by Indiana Street & Routes 93, 128 & 72, Golden, Jefferson County, CO

78 FR 7479 - Qualification of Drivers; Application for Exemptions; National Association of the Deaf

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-01

... Minnesota. He has driven intrastate for the past 14 years, including driving dump trucks and tractor trailer... CDL and drive heavy equipment such as a dump truck, or rig truck with a trailer, if granted an... DOT medical card. She would like to obtain a CDL and drive CMVs in interstate commerce, if granted an...

78 FR 22941 - Sidump'r Trailer Company, Inc., Grant of Petition for Decision of Inconsequential Noncompliance

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-17

... performance requirements. Finite element modeling is a mature science and appropriately accurate for modeling... interpretation letter to Jason Backs (CPS Trailers, May 28, 1998). \\3\\ Finite element analysis can be used as a... FMVSS No. 224 that the guard-like structure can serve as a rear impact guard.\\2\\ Sidump'r used a finite...

How To Modify a Trailer for Accessibility (Up to a Point) [and] Accessibility Considerations for Home Buyers. Key Notes.

ERIC Educational Resources Information Center

Access Group, Atlanta, GA.

Two brief fact sheets for people with disabilities provide information on: (1) modifying a trailer to make it accessible for persons with mobility impairments, especially those in wheelchairs, and (2) accessibility considerations for home buyers or home owners with mobility impairments. The first fact sheet identifies inherent problems in…

1998 Army Modernization Plan

DTIC Science & Technology

1998-01-01

Biological (CB) Protective Duty Uniform (STO) • Biometrics (SRO) • Nanoscience (SRO) • Millimeter Wave Material and Dissemination Technology... Biometrics and Nanoscience SROs will enable the development of advanced NBC detection and characterization systems, including the exploitation of biologically...Requirements Trailers • Procure HEMAT Trailers Figure K-23 K-19 //;<?. U.S. Army 1997Modernization Plan This final fleet assessment, made against the

Ground Systems Integration Domain (GSID) Materials for Ground Platforms

DTIC Science & Technology

2010-09-20

Vehicles • Heavy Brigade Combat Team • Strykers • MRAPs • Ground Combat Vehicles (Future) Tactical Vehicles • HMMWVs • Trailers • Heavy, Medium and...efficient structural material solutions • Signature management, electromagnetic shielding over potentially non-metallic surfaces • Diagnostics...Occupant-Centric Survivability Focused): 1. 4500 lbs + trailer towing capacity; 4-6 man crew compartmentPayload 2. 14,000 lb curb vehicle weightPerformance

Sustaining Operational Maneuver in the Twenty-First Century

DTIC Science & Technology

2010-05-13

battalion had two truck companies, each with 48 trucks and trailers , a medical detachment, and a headquarters company. Attached service and truck...division in the attack.176 A reserve unit which managed a rolling ammunition transfer point with 20 trailers loaded with ammunition augmenting the...the 1st Infantry Division with four maneuver brigades and an aviation brigade. Completing reception , staging, onward movement, and integration is the

49 CFR 571.110 - Tire selection and rims and motor home/recreation vehicle trailer load carrying capacity...

Code of Federal Regulations, 2014 CFR

2014-10-01

..., equipped with passenger car tires, the vehicle normal load on the tire shall be no greater than 94 percent..., the vehicle normal load on the tire shall be no greater than 94 percent of the load rating at the... vehicle trailer load carrying capacity information for motor vehicles with a GVWR of 4,536 kilograms (10...

49 CFR 571.110 - Tire selection and rims and motor home/recreation vehicle trailer load carrying capacity...

Code of Federal Regulations, 2012 CFR

2012-10-01

..., equipped with passenger car tires, the vehicle normal load on the tire shall be no greater than 94 percent..., the vehicle normal load on the tire shall be no greater than 94 percent of the load rating at the... vehicle trailer load carrying capacity information for motor vehicles with a GVWR of 4,536 kilograms (10...

49 CFR 571.110 - Tire selection and rims and motor home/recreation vehicle trailer load carrying capacity...

Code of Federal Regulations, 2011 CFR

2011-10-01

..., equipped with passenger car tires, the vehicle normal load on the tire shall be no greater than 94 percent..., the vehicle normal load on the tire shall be no greater than 94 percent of the load rating at the... vehicle trailer load carrying capacity information for motor vehicles with a GVWR of 4,536 kilograms (10...

49 CFR 571.110 - Tire selection and rims and motor home/recreation vehicle trailer load carrying capacity...

Code of Federal Regulations, 2013 CFR

2013-10-01

..., equipped with passenger car tires, the vehicle normal load on the tire shall be no greater than 94 percent..., the vehicle normal load on the tire shall be no greater than 94 percent of the load rating at the... vehicle trailer load carrying capacity information for motor vehicles with a GVWR of 4,536 kilograms (10...

49 CFR 571.110 - Tire selection and rims and motor home/recreation vehicle trailer load carrying capacity...

Code of Federal Regulations, 2010 CFR

2010-10-01

..., equipped with passenger car tires, the vehicle normal load on the tire shall be no greater than 94 percent..., the vehicle normal load on the tire shall be no greater than 94 percent of the load rating at the... vehicle trailer load carrying capacity information for motor vehicles with a GVWR of 4,536 kilograms (10...

26 CFR 145.4051-1 - Imposition of tax on heavy trucks and trailers sold at retail.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 17 2010-04-01 2010-04-01 false Imposition of tax on heavy trucks and trailers sold at retail. 145.4051-1 Section 145.4051-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF... THE HIGHWAY REVENUE ACT OF 1982 (PUB. L. 97-424) § 145.4051-1 Imposition of tax on heavy trucks and...

Seed spillage from grain trailers on road verges during oilseed rape harvest: an experimental survey.

PubMed

Bailleul, Diane; Ollier, Sébastien; Huet, Sylvie; Gardarin, Antoine; Lecomte, Jane

2012-01-01

Anthropogenic vectors enhance the natural dispersal capacity of plant seeds significantly in terms of quantity and distance. Human-mediated seed dispersal (i.e. anthropochory) greatly increases the dispersal of crop species across agroecosystems. In the case of oilseed rape (OSR), spillage of seeds from grain trailers during harvest has never been quantified. Our experimental approach involved establishing 85 seed trap-sites on the road verges of an agricultural area around the grain silo of Selommes (Loir-et-Cher, France). We recorded OSR spillage during harvest and applied a linear model to the data. The amount of seed spilled was related positively to the area of the OSR fields served by the road, whereas the amount of seed spilled decreased with other variables, such as distance from the trap-site to the verge of the road and to the nearest field. The distance to the grain silo, through local and regional effects, affected seed loss. Local effects from fields adjacent to the road resulted in a cumulative spillage on one-lane roads. On two-lane roads, spillage was nearly constant whatever the distance to the silo due to a mixture of these local effects and of grain trailers that joined the road from more distant fields. From the data, we predicted the number of seeds lost from grain trailers on one road verge in the study area. We predicted a total spillage of 2.05 × 10(6) seeds (± 4.76 × 10(5)) along the road length, which represented a mean of 404 ± 94 seeds per m(2). Containment of OSR seeds will always be challenging. However, seed spillage could be reduced if grain trailers were covered and filled with less seed. Reducing distances travelled between fields and silos could also limit seed loss.

Addressing media stigma for people experiencing mental illness using an entertainment-education strategy.

PubMed

Ritterfeld, Ute; Jin, Seung-A

2006-03-01

This study examines the effects of Entertainment-Education strategy on knowledge acquisition about schizophrenia and stigma reduction, using pretest posttest control group and 2 X 3 (advocate's perspective X message style) between-subjects factorial design. Participants watched an accurate and empathetic movie portrayal of schizophrenia, followed by an educational trailer. Participants (N= 165) were randomly assigned to one of eight conditions (six manipulated conditions, control, a group who watched a trailer prior to the movie). Results showed that viewing an accurate and empathetic movie portrayal increased knowledge. The educational trailer increased not only knowledge acquisition but influenced stigma reduction. Structural equation modeling analysis revealed that entertainment and educational value of the movie mediated stigma reduction. Implications of this study to the mental health research and the design of Entertainment-Education contents are discussed.

The Lightcraft Technology Demonstration Program. Part 1

DTIC Science & Technology

2007-11-01

inlet). The afterbody had a dual function as a primary receptive optic (parabolic mirror) for the laser beam and as an external expansion surface... Trailers ............74 Fig. 81. Flight Test with Condor Crane .......................................................................76 Fig. 82...the respective text. The PLVTS was a 10.6 μm CO2 laser with a pulse width of 30 μs located in a trailer (see Fig. 1). The PLVTS was built in 1989

WILDLIFE - ALLIGATOR STRADDLES TWO PARKING SPACES IN FRONT OF OFFICE TRAILER

NASA Technical Reports Server (NTRS)

1982-01-01

Double-parked, an angry alligator straddles two parking spaces outside an office trailer at NASA's Launch Complex 17. Hank Curtin of Pan Am watches from a safe perch as John Tanner gets ready to wrap a rope around the snout of the 10-foot, 9-inch beast. It's all in a day's work for Tanner, who has a contract with the state of Florida to remove nuisance alligators.

PRELAUNCH - GEMINI-TITAN (GT)-12 - LEAVE TRAILER - CAPE

NASA Image and Video Library

1966-11-11

S66-59916 (11 Nov. 1966) --- Prime crew for the Gemini-12 spaceflight, astronauts James A. Lovell Jr. (leading), command pilot, and Edwin E. Aldrin Jr., pilot, leave the suiting trailer at Launch Complex 16 during prelaunch countdown. Moments later they entered a transport van which carried them to Pad 19 and their waiting spacecraft. The liftoff was at 3:46 p.m. (EST), Nov. 11, 1966. Photo credit: NASA

49 CFR 393.13 - Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers...

Code of Federal Regulations, 2010 CFR

2010-10-01

... have an overall width of 2,032 mm (80 inches) or more and a gross vehicle weight rating of 4,536 kg (10... as part of a red and white pattern. Retroreflective sheeting shall have a width of at least 50 mm (2... 375 mm (15 inches) and 1,525 mm (60 inches) above the road surface when measured with the trailer...

49 CFR 393.13 - Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers...

Code of Federal Regulations, 2011 CFR

2011-10-01

... have an overall width of 2,032 mm (80 inches) or more and a gross vehicle weight rating of 4,536 kg (10... as part of a red and white pattern. Retroreflective sheeting shall have a width of at least 50 mm (2... 375 mm (15 inches) and 1,525 mm (60 inches) above the road surface when measured with the trailer...

Gait of dairy cows on floors with different slipperiness.

PubMed

Telezhenko, E; Magnusson, M; Bergsten, C

2017-08-01

This study assessed the slip resistance of different types of solid flooring in cattle housing using a range of technical tests and gait analysis. Dynamic and static coefficient of friction, skid resistance, and abrasiveness were tested on concrete flooring with a smooth finish, a grooved pattern, or a tamped pattern, acid-resistant mastic asphalt, soft rubber mats, and a worn slatted concrete floor. Coefficients of friction and skid resistance were tested under clean and slurry-soiled conditions. Linear kinematic variables were assessed in 40 cows with trackway measurements after the cows passed over the floors in a straight walk. All gait variables were assessed as deviations from those obtained on the slatted concrete floor, which was used as a baseline. The coefficient of friction tests divided the floors into 3 categories: concrete flooring, which had a low coefficient of friction (0.29-0.41); mastic asphalt flooring, which had medium values (0.38-0.45); and rubber mats, which had high values (0.49-0.57). The highest abrasion (g/10 m) was on the asphalt flooring (4.48), and the concrete flooring with a tamped pattern had significantly higher abrasiveness (2.77) than the other concrete floors (1.26-1.60). Lowest values on the skid-resistance tests (dry/wet) were for smooth concrete (79/35) and mastic asphalt (65/47), especially with a slurry layer on the surface. Gait analysis mainly differentiated floors with higher friction and abrasion by longer strides and better tracking. Step asymmetry was lower on floors with high skid-resistance values. The most secure cow gait, in almost every aspect, was observed on soft rubber mats. Relationships between gait variables and physical floor characteristics ranged from average to weak (partial correlations 0.54-0.16). Thus, none of the physical characteristics alone was informative enough to characterize slip resistance. With reference to gait analysis, the abrasiveness of the hard surfaces was more informative than the coefficient of friction, but the effect of pattern was better detected by skid-resistance measurements. Consequently, several physical characteristics are needed to objectively describe the slip resistance of cattle floors. Soft rubber mats gave better tracking than hard, solid floors, even with a grooved surface or a tamped pattern. Copyright © 2017 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.

46. ARAI. Aerial view of ARAI buildings as they looked ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

46. ARA-I. Aerial view of ARA-I buildings as they looked in 1981. From left to right, buildings are tank (ARA-727), contaminated waste storage tank (ARA-629), trailer, hot cell building (ARA-626), fuel oil storage tank (ARA-728), guard house (ARA-628), shop and maintenance building (ARA-627), and two trailers. Ineel photo no. 81-297. - Idaho National Engineering Laboratory, Army Reactors Experimental Area, Scoville, Butte County, ID

Tracking Next-Generation Automatic Identification Technology (AIT) into 2035

DTIC Science & Technology

2010-04-01

Non-proliferation and Treaty inspections  Shielding / EMI issues  Security/Integrity/Encryption  Taiwan Shipment Fact Sheet http...followed the technical data, but had no idea that they had a live nuclear warhead. While the nuclear ALCM was loaded on the munitions trailer , the...three-man team continued to assemble the other seven ALCMs. As the end of shift neared, all eight ALCMs were loaded on the munitions trailers and the

Combating WMD: Journal of the U.S. Army Nuclear and CWMD Agency. Issue 5, Spring/Summer 2010

DTIC Science & Technology

2010-06-01

reception . In the past, antennas were protected from unwanted signals with high capaci- tance metal oxide varistors (a type of surge suppressor) placed at...including a gas-cooled reactor design combined with a closed-cycle gas-turbine generator that could be transportable on semi- trailers , railroad...where else. Towns, schools, shopping areas, theatres, hospitals, residential areas with houses, trailers , hutments, and barracks went up by the

Army Communicator. Voice of the Signal Regiment. Volume 33, Number 2, Spring 2008

DTIC Science & Technology

2008-01-01

platform and a satellite terminal trailer . This configuration supported the requirements of the TAC, as well as, provided additional power generation...Satellite Terminal Trailer TAC – Tactical Assault Command TDMA – time division multiple ac- cess TOCNET – Tactical Operations Cen- ter Network VHF – very...cies as necessary, in order to organize the Reception , Staging, Onward Movements, and Integra- tion, as appropriate. Finally, the home base CP is key

ASTRONAUT JAMES A. LOVELL, JR. - PRELAUNCH - GT-12 - LEAVE TRAILER - CAPE

NASA Image and Video Library

1966-11-11

S66-59974 (11 Nov. 1966) --- Prime crew for the Gemini-12 spaceflight, astronauts James A. Lovell Jr., (leading), command pilot, and Edwin E. Aldrin Jr., pilot, leave the suiting trailer at Launch Complex 16 during prelaunch countdown. Moments later they entered a transport van which carried them to Pad 19 and their waiting spacecraft. The liftoff was at 3:46 p.m. (EST), Nov. 11, 1966. Photo credit: NASA

Conceptual and perceptual encoding instructions differently affect event recall.

PubMed

García-Bajos, Elvira; Migueles, Malen; Aizpurua, Alaitz

2014-11-01

When recalling an event, people usually retrieve the main facts and a reduced proportion of specific details. The objective of this experiment was to study the effects of conceptually and perceptually driven encoding in the recall of conceptual and perceptual information of an event. The materials selected for the experiment were two movie trailers. To enhance the encoding instructions, after watching the first trailer participants answered conceptual or perceptual questions about the event, while a control group answered general knowledge questions. After watching the second trailer, all of the participants completed a closed-ended recall task consisting of conceptual and perceptual items. Conceptual information was better recalled than perceptual details and participants made more perceptual than conceptual commission errors. Conceptually driven processing enhanced the recall of conceptual information, while perceptually driven processing not only did not improve the recall of descriptive details, but also damaged the standard conceptual/perceptual recall relationship.

Tyre induced vibrations of the car-trailer system

NASA Astrophysics Data System (ADS)

Beregi, S.; Takács, D.; Stépán, G.

2016-02-01

The lateral and yaw dynamics of the car-trailer combination are analysed by means of a single track model. The equations of motion are derived rigorously by means of the Appell-Gibbs equations for constant longitudinal velocity of the vehicle. The tyres are described with the help of the so-called delayed tyre model, which is based on a brush model with pure rolling contact. The lateral forces and aligning torques of the tyre/road interaction are calculated via the instantaneous lateral deformations in the contact patches. The linear stability analysis of the rectilinear motion is performed via the analytically determined characteristic function of the system. Stability charts are constructed with respect to the vehicle longitudinal velocity and the payload position on the trailer. Self-excited lateral vibrations are detected with different vibration modes at low and at high longitudinal speeds of the vehicle. The effects of the tyre parameters are also investigated.

Black-White Differences in Housing Type and Sleep Duration as Well as Sleep Difficulties in the United States.

PubMed

Johnson, Dayna A; Thorpe, Roland J; McGrath, John A; Jackson, W Braxton; Jackson, Chandra L

2018-03-21

Housing environments can directly and indirectly affect sleep, and blacks are more likely than whites to live in suboptimal housing conditions, which may independently contribute to sleep disparities. However, few large-scale epidemiological studies consider the potential influence of housing type on sleep health. Using data from the 2004-2015 National Health Interview Survey, we investigated overall and Black-White differences in the association between housing type (house/apartment versus mobile home/trailer) and sleep duration as well as sleep difficulties among 226,208 adults in the U.S. Poisson regression with robust variance was used to estimate sex-specific prevalence ratios (PR) for sleep categories, first comparing houses/apartments to mobile homes/trailers and then blacks to whites within housing types. All models were adjusted for age, educational attainment, income, occupational class, self-reported general health status, and region of residence. Compared to participants living in houses/apartments, the prevalence of short sleep was higher for men (PR = 1.05 (95% confidence interval (CI): 1.02-1.08)) and women (PR = 1.07 (95% CI: 1.04-1.09)) in mobile homes/trailers. Black men (PR = 1.26 (95% CI: 1.21-1.30)) and women (PR = 1.24 (95% CI: 1.20-1.27)) in a house/apartment were more likely to be short sleepers than their white counterparts. There was generally no significant difference in sleep characteristics (except long sleep) between black and white men in mobile homes/trailers after adjustments, and black men in houses/apartments as well as black women in both housing types were less likely to report sleep difficulties although being more likely to report short sleep. Overall, individuals in mobile homes/trailers, which may represent suboptimal housing, had worse sleep than those in houses/apartments; and racial differences in the quality of houses and apartments are likely to greatly vary in ways that still contribute to sleep disparities. Race-sex group differences in sleep duration among residents in a house/apartment and even a lack of racial difference among individuals living in mobile homes/trailers support the need for more research on residential environments and eventually multi-level interventions designed to reduce sleep disparities.

KSC-69PC-484

NASA Image and Video Library

1969-07-26

KENNEDY SPACE CENTER, FLA. - Within the Mobile Quarantine Facility, Apollo 11 astronauts (left to right) Michael Collins, Edwin E. Aldrin Jr. and Neil A. Armstrong relax following their successful lunar landing mission. They spent two-and-one-half days in the quarantine trailer enroute from the USS Hornet, prime recovery ship, to the Lunar Receiving Laboratory at the Manned Spacecraft Center in Houston. The Hornet docked at Pearl Harbor where the trailer was transferred to a jet aircraft for the flight to Houston.

Environmental Assessment (EA): Proposed Truck Offload Station, Hill Air Force Base, Utah

DTIC Science & Technology

2012-11-09

AFB storm drainage system . A spill occurred outside the containment area when a fuel trailer struck a concrete wall and the fuel tank ruptured...The trailer was immediately pulled into the containment area, but some fuel had already entered the Hill AFB storm drainage system and flowed to Pond 3...placed in containers for proper disposal. Clean water would then be released to the Hill AFB storm drainage system . The proposed action would

High Resolution Trichromatic Road Surface Scanning with a Line Scan Camera and Light Emitting Diode Lighting for Road-Kill Detection.

PubMed

Lopes, Gil; Ribeiro, A Fernando; Sillero, Neftalí; Gonçalves-Seco, Luís; Silva, Cristiano; Franch, Marc; Trigueiros, Paulo

2016-04-19

This paper presents a road surface scanning system that operates with a trichromatic line scan camera with light emitting diode (LED) lighting achieving road surface resolution under a millimeter. It was part of a project named Roadkills-Intelligent systems for surveying mortality of amphibians in Portuguese roads, sponsored by the Portuguese Science and Technology Foundation. A trailer was developed in order to accommodate the complete system with standalone power generation, computer image capture and recording, controlled lighting to operate day or night without disturbance, incremental encoder with 5000 pulses per revolution attached to one of the trailer wheels, under a meter Global Positioning System (GPS) localization, easy to utilize with any vehicle with a trailer towing system and focused on a complete low cost solution. The paper describes the system architecture of the developed prototype, its calibration procedure, the performed experimentation and some obtained results, along with a discussion and comparison with existing systems. Sustained operating trailer speeds of up to 30 km/h are achievable without loss of quality at 4096 pixels' image width (1 m width of road surface) with 250 µm/pixel resolution. Higher scanning speeds can be achieved by lowering the image resolution (120 km/h with 1 mm/pixel). Computer vision algorithms are under development to operate on the captured images in order to automatically detect road-kills of amphibians.

High Resolution Trichromatic Road Surface Scanning with a Line Scan Camera and Light Emitting Diode Lighting for Road-Kill Detection

PubMed Central

Lopes, Gil; Ribeiro, A. Fernando; Sillero, Neftalí; Gonçalves-Seco, Luís; Silva, Cristiano; Franch, Marc; Trigueiros, Paulo

2016-01-01

This paper presents a road surface scanning system that operates with a trichromatic line scan camera with light emitting diode (LED) lighting achieving road surface resolution under a millimeter. It was part of a project named Roadkills—Intelligent systems for surveying mortality of amphibians in Portuguese roads, sponsored by the Portuguese Science and Technology Foundation. A trailer was developed in order to accommodate the complete system with standalone power generation, computer image capture and recording, controlled lighting to operate day or night without disturbance, incremental encoder with 5000 pulses per revolution attached to one of the trailer wheels, under a meter Global Positioning System (GPS) localization, easy to utilize with any vehicle with a trailer towing system and focused on a complete low cost solution. The paper describes the system architecture of the developed prototype, its calibration procedure, the performed experimentation and some obtained results, along with a discussion and comparison with existing systems. Sustained operating trailer speeds of up to 30 km/h are achievable without loss of quality at 4096 pixels’ image width (1 m width of road surface) with 250 µm/pixel resolution. Higher scanning speeds can be achieved by lowering the image resolution (120 km/h with 1 mm/pixel). Computer vision algorithms are under development to operate on the captured images in order to automatically detect road-kills of amphibians. PMID:27104535

EVALUATION OF THE EFFECTIVENESS OF TRUCK EFFICIENCY TECHNOLOGIES IN CLASS 8 TRACTOR-TRAILERS BASED ON A TRACTIVE ENERGY ANALYSIS USING MEASURED DRIVE CYCLE DATA

DOE Office of Scientific and Technical Information (OSTI.GOV)

LaClair, Tim J; Gao, Zhiming; Fu, Joshua S.

2014-01-01

Quantifying the fuel savings that can be achieved from different truck fuel efficiency technologies for a fleet s specific usage allows the fleet to select the combination of technologies that will yield the greatest operational efficiency and profitability. This paper presents an analysis of vehicle usage in a commercial vehicle fleet and an assessment of advanced efficiency technologies using an analysis of measured drive cycle data for a class 8 regional commercial shipping fleet. Drive cycle measurements during a period of a full year from six tractor-trailers in normal operations in a less-than-truckload (LTL) carrier were analyzed to develop amore » characteristic drive cycle that is highly representative of the fleet s usage. The vehicle mass was also estimated to account for the variation of loads that the fleet experienced. The drive cycle and mass data were analyzed using a tractive energy analysis to quantify the fuel efficiency and CO2 emissions benefits that can be achieved on class 8 tractor-trailers when using advanced efficiency technologies, either individually or in combination. Although differences exist among class 8 tractor-trailer fleets, this study provides valuable insight into the energy and emissions reduction potential that various technologies can bring in this important trucking application.« less

Scope and frequency of fluconazole trailing assessed using EUCAST in invasive Candida spp. isolates.

PubMed

Marcos-Zambrano, Laura Judith; Escribano, Pilar; Sánchez-Carrillo, Carlos; Bouza, Emilio; Guinea, Jesús

2016-10-01

Trailing is a well-known phenomenon that is defined as reduced but persistent visible growth of Candida spp. at fluconazole concentrations above the MIC. Trailing is commonly detected using the CLSI M27-A3 method, although little is known about its frequency when investigated with EUCAST. We assessed the frequency and scope of fluconazole trailing after using EUCAST EDef 7.2. against a large number of Candida spp. isolates from patients with candidemia. We studied 639 fluconazole-susceptible non-krusei Candida spp. isolates from 570 patients admitted to Gregorio Marañón Hospital. Isolates were tested in vitro for fluconazole susceptibility according to the EUCAST EDef 7.2 procedure; trailing was defined as the presence of any residual growth in wells containing fluconazole concentrations above the MIC. According to the mean percentage of trailing observed, isolates were classified as residual trailers (0.1-5%), slight trailers (6%-10%), moderate trailers (11%-15%), and heavy trailers (>15%). The relationship between trailing and genotyping was assessed. The mean overall percentage of trailing was 6.8%, with C. albicans and C. tropicalis showing the highest percentages (9.75% and 9.29%, respectively; P < .001). C. albicans and C. tropicalis had the highest percentage of heavy trailers (>15%). Trailing was not genotype-specific. Fluconazole trailing was observed frequently when EUCAST was used for antifungal susceptibility testing, particularly in isolates of C. albicans and C. tropicalis The cut-off proposed enabled us to classify the isolates according to the degree of trailing and can be used as the basis for future studies to evaluate the clinical impact of this phenomenon. © The Author 2016. Published by Oxford University Press on behalf of The International Society for Human and Animal Mycology. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Concept Design of Trailor Ferry Service to Carry 150 Trailers Between Jacksonville, FL and Bridgeport, CT of USA

NASA Astrophysics Data System (ADS)

Sindagi, S. C.; Sandhu, B. S.

2015-04-01

With the increased load on highways, today there is a need to develop alternate ways to transport goods within the sovereignty. The use of ships to transport goods has always been the primary method of transporting goods across the seas but it can also be used to transport goods within the country. This way we can reduce the load on highways which at this point of time serve as the primary method of transportation. Worldwide very few ferries are in operation which transports 100-150 Trailers between two ports. Catching on this opportunity for design, construction and operation of vessels, a survey for possible routes in United States of America which will transport 150 Trailers has been conducted by various authorities and organizations. The challenge here is to determine the parameters of the vessel and design a fleet of vessels that could carry trailers along with their tractors within the least possible time and in with least possible freight between Jacksonville, FL and Bridgeport, CT of United States of America. The primary aim of the work presented here is to propose a design with fleet in such a way that each day 150 trailers could be loaded and unloaded at each of the two mentioned ports. An analysis of the route between the ports brought out various primary parameters like the distance, weather, different load lines to be encountered and also several size constraints that the vessel needs to adhere to, in order to ply smoothly on this route. The vessel is designed as per the Guidelines for ships operating in international waters. The economic analysis of the project was performed spanning over 20 years and the best freight was found out which would be most profitable for the company as well as be a good value for money for the customers.

Closure Report for Corrective Action Unit 340: NTS Pesticide Release Sites Nevada Test Site, Nevada

DOE Office of Scientific and Technical Information (OSTI.GOV)

C. M. Obi

The purpose of this report is to provide documentation of the completed corrective action and to provide data confirming the corrective action. The corrective action was performed in accordance with the approved Corrective Action Plan (CAP) (U.S. Department of Energy [DOE], 1999) and consisted of clean closure by excavation and disposal. The Area 15 Quonset Hut 15-11 was formerly used for storage of farm supplies including pesticides, herbicides, and fertilizers. The Area 23 Quonset Hut 800 was formerly used to clean pesticide and herbicide equipment. Steam-cleaning rinsate and sink drainage occasionally overflowed a sump into adjoining drainage ditches. One ditchmore » flows south and is referred to as the quonset hut ditch. The other ditch flows southeast and is referred to as the inner drainage ditch. The Area 23 Skid Huts were formerly used for storing and mixing pesticide and herbicide solutions. Excess solutions were released directly to the ground near the skid huts. The skid huts were moved to a nearby location prior to the site characterization performed in 1998 and reported in the Corrective Action Decision Document (CADD) (DOE, 1998). The vicinity and site plans of the Area 23 sites are shown in Figures 2 and 3, respectively.« less

2007 Joint Service Power Expo - Power and Energy Independence for Warfighters. Volume 1

DTIC Science & Technology

2007-04-26

Equipment, Major David C. Morris Integrated Trailer -ECU-Generator (ITEG), Major David C. Morris Solving power supply obsolescence, reliability, and power...4805) 6:00 p.m. - 8:00 p.m. Conference Reception in Exhibit Hall Wednesday, April 25, 2007 7:00 a.m. - 5:30 p.m. Exhibit Hall Open 7:00 a.m. - 8:00 a.m...4689) Moving Forward with Fuel Cells: Army CERDEC Development & Demonstration Progress - US Army, CERDEC, Elizabeth Bostic (#4684) Integrated Trailer

Installation Development Environmental Assessment at Joint Base Andrews-Naval Air Facility Washington Prince George’s County, Maryland

DTIC Science & Technology

2013-04-01

and seven additional aircraft by fiscal year (FY) 16. As an interim solution, temporary trailers totaling 4,000 square feet (SF) are being used on a...hangar floor to accommodate office space and aircrew flight equipment workshop needs. However, the use of trailers comes at a direct cost to the...facility would have 18 classrooms, a gross motor room, a lobby with reception area, a conference room, administrative offices, a staff lounge, a full-service

Lance Handbook, Firing Team Leader’s

DTIC Science & Technology

1983-03-01

Matches Crimpers Electrical Tape Blasting Caps Sandbags NOTE: Blasting caps should not be carried near troops. Sandbag in a trailer when possible. 11...cover should be kept inside the safe-arm lockbox and the key in the possession of the senior person in charge. 14. M2A3/ M2A4 SHAPE CHARGES...secured; blasting caps can be carried in k-ton trailer). m. Extra BA-30 batteries. n. VRC-46 radio. 0. RC 292 antenna. p. CDS card. q. 1150 for round

GT-6 PREFLIGHT ACTIVITY (LEAVE SUITING TRAILER) - ASTRONAUT WALTER M. SCHIRRA, JR. - SUIT

NASA Image and Video Library

1965-12-15

S65-59974 (15 Dec. 1965) --- Astronauts Walter M. Schirra Jr. (leading), command pilot; and Thomas P. Stafford, pilot, leave the suiting trailer at Launch Complex 16 during the Gemini-6 prelaunch countdown at Cape Kennedy, Florida. They entered a special transport van which carried them to Pad 19 and their spacecraft. Gemini-6 lifted off at 8:37 a.m. (EST) on Dec. 15, 1965. Photo credit: NASA or National Aeronautics and Space Administration

Effect of aggregate graining compositions on skid resistance of Exposed Aggregate Concrete pavement

NASA Astrophysics Data System (ADS)

Wasilewska, Marta; Gardziejczyk, Wladysław; Gierasimiuk, Pawel

2018-05-01

The paper presents the evaluation of skid resistance of EAC (Exposed Aggregate Concrete) pavements which differ in aggregate graining compositions. The tests were carried out on concrete mixes with a maximum aggregate size of 8 mm. Three types of coarse aggregates were selected depending on their resistance to polishing which was determined on the basis of the PSV (Polished Stone Value). Basalt (PSV 48), gabbro (PSV 50) and trachybasalt (PSV 52) aggregates were chosen. For each type of aggregate three graining compositions were designed, which differed in the content of coarse aggregate > 4mm. Their content for each series was as follows: A - 38%, B - 50% and C - 68%. Evaluation of the skid resistance has been performed using the FAP (Friction After Polishing) test equipment also known as the Wehner/Schulze machine. Laboratory method enables to compare the skid resistance of different types of wearing course under specified conditions simulating polishing processes. In addition, macrotexture measurements were made on the surface of each specimen using the Elatexure laser profile. Analysis of variance showed that at significance level α = 0.05, aggregate graining compositions as well as the PSV have a significant influence on the obtained values of the friction coefficient μm of the tested EAC pavements. The highest values of the μm have been obtained for EAC with the lowest amount of coarse aggregates (compositions A). In these cases the resistance to polishing of the aggregate does not significantly affect the friction coefficients. This is related to the large areas of cement mortar between the exposed coarse grains. Based on the analysis of microscope images, it was observed that the coarse aggregates were not sufficiently exposed. It has been proved that PSV significantly affected the coefficient of friction in the case of compositions B and C. This is caused by large areas of exposed coarse aggregate. The best parameters were achieved for the EAC pavements with graining composition B and C and trachybasalt aggregate.

Definition of simulated driving tests for the evaluation of drivers' reactions and responses.

PubMed

Bartolozzi, Riccardo; Frendo, Francesco

2014-01-01

This article aims at identifying the most significant measures in 2 perception-response (PR) tests performed at a driving simulator: a braking test and a lateral skid test, which were developed in this work. Forty-eight subjects (26 females and 22 males) with a mean age of 24.9 ± 3.0 years were enrolled for this study. They were asked to perform a drive on the driving simulator at the University of Pisa (Italy) following a specific test protocol, including 8-10 braking tests and 8-10 lateral skid tests. Driver input signals and vehicle model signals were recorded during the drives and analyzed to extract measures such as the reaction time, first response time, etc. Following a statistical procedure (based on analysis of variance [ANOVA] and post hoc tests), all test measures (3 for the braking test and 8 for the lateral skid test) were analyzed in terms of statistically significant differences among different drivers. The presented procedure allows evaluation of the capability of a given test to distinguish among different drivers. In the braking test, the reaction time showed a high dispersion among single drivers, leading to just 4.8 percent of statistically significant driver pairs (using the Games-Howell post hoc test), whereas the pedal transition time scored 31.9 percent. In the lateral skid test, 28.5 percent of the 2 × 2 comparisons showed significantly different reaction times, 19.5 percent had different response times, 35.2 percent had a different second peak of the steering wheel signal, and 33 percent showed different values of the integral of the steering wheel signal. For the braking test, which has been widely employed in similar forms in the literature, it was shown how the reaction time, with respect to the pedal transition time, can have a higher dispersion due to the influence of external factors. For the lateral skid test, the following measures were identified as the most significant for application studies: the reaction time for the reaction phase, the second peak of the steering wheel angle for the first instinctive response, and the integral of the steering wheel angle for the complete response. The methodology used to analyze the test measures was founded on statistically based and objective evaluation criteria and could be applied to other tests. Even if obtained with a fixed-base simulator, the obtained results represent useful information for applications of the presented PR tests in experimental campaigns with driving simulators.

Two-tier tube-trailer pressure consolidation operation method for hydrogen refueling station cost reduction

DOE PAGES

Reddi, Krishna; Elgowainy, Amgad; Rustagi, Neha; ...

2018-01-10

An operation strategy known as two-tier “pressure consolidation” of delivered tube-trailers (or equivalent supply storage) has been developed to maximize the throughput at gaseous hydrogen refueling stations (HRSs) for fuel cell electric vehicles (FCEVs). The high capital costs of HRSs and the consequent high investment risk are deterring growth of the infrastructure needed to promote the deployment of FCEVs. Stations supplied by gaseous hydrogen will be necessary for FCEV deployment in both the near and long term. Here, the two-tier pressure consolidation method enhances gaseous HRSs in the following ways: (1) reduces the capital cost compared with conventional stations, asmore » well as those operating according to the original pressure consolidation approach described by Elgowainy et al. (2014) [1], (2) minimizes pressure cycling of HRS supply storage relative to the original pressure consolidation approach; and (3) increases use of the station’s supply storage (or delivered tube-trailers) while maintaining higher state-of-charge vehicle fills.« less

Going wireless and booth-less for hearing testing in industry.

PubMed

Meinke, Deanna K; Norris, Jesse A; Flynn, Brendan P; Clavier, Odile H

2017-01-01

To assess the test-retest variability of hearing thresholds obtained with an innovative, mobile wireless automated hearing-test system (WAHTS) with enhanced sound attenuation to test industrial workers at a worksite as compared to standardised automated hearing thresholds obtained in a mobile trailer sound booth. A within-subject repeated-measures design was used to compare air-conducted threshold tests (500-8000 Hz) measured with the WAHTS in six workplace locations, and a third test using computer-controlled audiometry obtained in a mobile trailer sound booth. Ambient noise levels were measured in all test environments. Twenty workers served as listeners and 20 workers served as operators. On average, the WAHTS resulted in equivalent thresholds as the mobile trailer audiometry at 1000, 2000, 3000 and 8000 Hz and thresholds were within ±5 dB at 500, 4000 and 6000 Hz. Comparable performance may be obtained with the WAHTS in occupational audiometry and valid thresholds may be obtained in diverse test locations without the use of sound-attenuating enclosures.

Two-tier tube-trailer pressure consolidation operation method for hydrogen refueling station cost reduction

DOE Office of Scientific and Technical Information (OSTI.GOV)

Reddi, Krishna; Elgowainy, Amgad; Rustagi, Neha

An operation strategy known as two-tier “pressure consolidation” of delivered tube-trailers (or equivalent supply storage) has been developed to maximize the throughput at gaseous hydrogen refueling stations (HRSs) for fuel cell electric vehicles (FCEVs). The high capital costs of HRSs and the consequent high investment risk are deterring growth of the infrastructure needed to promote the deployment of FCEVs. Stations supplied by gaseous hydrogen will be necessary for FCEV deployment in both the near and long term. Here, the two-tier pressure consolidation method enhances gaseous HRSs in the following ways: (1) reduces the capital cost compared with conventional stations, asmore » well as those operating according to the original pressure consolidation approach described by Elgowainy et al. (2014) [1], (2) minimizes pressure cycling of HRS supply storage relative to the original pressure consolidation approach; and (3) increases use of the station’s supply storage (or delivered tube-trailers) while maintaining higher state-of-charge vehicle fills.« less

Combined Aero and Underhood Thermal Analysis for Heavy Duty Trucks

DOE Office of Scientific and Technical Information (OSTI.GOV)

Vegendla, Prasad; Sofu, Tanju; Saha, Rohit

2017-01-31

Aerodynamic analysis of the medium-duty delivery truck was performed to achieve vehicle design optimization. Three dimensional CFD simulations were carried out for several improved designs, with a detailed external component analysis of wheel covers, side skirts, roof fairings, and rounded trailer corners. The overall averaged aerodynamics drag reduction through the design modifications were shown up to 22.3% through aerodynamic considerations alone, which is equivalent to 11.16% fuel savings. The main identified fuel efficiencies were based on second generation devices, including wheel covers, side skirts, roof fairings, and rounded trailer corners. The important findings of this work were; (i) the optimummore » curvature radius of the rounded trailer edges found to be 125 mm, with an arc length of 196.3 mm, (ii) aerodynamic drag reduction increases with dropping clearance of side skirts between wheels and ground, and (iii) aerodynamic drag reduction increases with an extension of front bumper towards the ground.« less

An electromyographic and kinematic comparison between an extendable conveyor system and an articulating belt conveyor used for truck loading and unloading tasks.

PubMed

Lavender, Steven A; Nagavarapu, Shasank; Allread, W Gary

2017-01-01

Many retail distribution centers (DCs) manually load and unload boxes into or out of trailers and shipping containers. This study investigated whether an articulating belt conveyor with a height adjustable platform, positioned at the end of an extendable conveyor, significantly reduces shoulder and back muscle loading and the spine kinematics associated with these tasks. Electromyographic and kinematic data were collected from eight volunteer employees as trailers at a shoe DC were unloaded and from nine volunteer employees as trailers at an apparel DC were loaded. Participants in this repeated measures study handled boxes with a conventional powered extendable conveyor system and with the articulating belt conveyor positioned at the end of the extendable conveyor. Bilaterally the normalized activation levels of the erector spinae and anterior deltoid muscles were reduced when loading and unloading boxes with the articulating belt conveyor. Spine movement speeds were also reduced with the articulating conveyor. Copyright © 2016 Elsevier Ltd. All rights reserved.

Fast neutron counting in a mobile, trailer-based search platform

NASA Astrophysics Data System (ADS)

Hayward, Jason P.; Sparger, John; Fabris, Lorenzo; Newby, Robert J.

2017-12-01

Trailer-based search platforms for detection of radiological and nuclear threats are often based upon coded aperture gamma-ray imaging, because this method can be rendered insensitive to local variations in gamma background while still localizing the source well. Since gamma source emissions are rather easily shielded, in this work we consider the addition of fast neutron counting to a mobile platform for detection of sources containing Pu. A proof-of-concept system capable of combined gamma and neutron coded-aperture imaging was built inside of a trailer and used to detect a 252Cf source while driving along a roadway. Neutron detector types employed included EJ-309 in a detector plane and EJ-299-33 in a front mask plane. While the 252Cf gamma emissions were not readily detectable while driving by at 16.9 m standoff, the neutron emissions can be detected while moving. Mobile detection performance for this system and a scaled-up system design are presented, along with implications for threat sensing.

Forecasting the student–professor matches that result in unusually effective teaching

PubMed Central

Gross, Jennifer; Lakey, Brian; Lucas, Jessica L; LaCross, Ryan; R Plotkowski, Andrea; Winegard, Bo

2015-01-01

Background Two important influences on students' evaluations of teaching are relationship and professor effects. Relationship effects reflect unique matches between students and professors such that some professors are unusually effective for some students, but not for others. Professor effects reflect inter-rater agreement that some professors are more effective than others, on average across students. Aims We attempted to forecast students' evaluations of live lectures from brief, video-recorded teaching trailers. Sample Participants were 145 college students (74% female) enrolled in introductory psychology courses at a public university in the Great Lakes region of the United States. Methods Students viewed trailers early in the semester and attended live lectures months later. Because subgroups of students viewed the same professors, statistical analyses could isolate professor and relationship effects. Results Evaluations were influenced strongly by relationship and professor effects, and students' evaluations of live lectures could be forecasted from students' evaluations of teaching trailers. That is, we could forecast the individual students who would respond unusually well to a specific professor (relationship effects). We could also forecast which professors elicited better evaluations in live lectures, on average across students (professor effects). Professors who elicited unusually good evaluations in some students also elicited better memory for lectures in those students. Conclusions It appears possible to forecast relationship and professor effects on teaching evaluations by presenting brief teaching trailers to students. Thus, it might be possible to develop online recommender systems to help match students and professors so that unusually effective teaching emerges. PMID:24953773

Driver Training Simulator for Backing Up Commercial Vehicles with Trailers

NASA Astrophysics Data System (ADS)

Berg, Uwe; Wojke, Philipp; Zöbel, Dieter

Backing up tractors with trailers is a difficult task since the kinematic behavior of articulated vehicles is complex and hard to control. Especially unskilled drivers are overstrained with the complicated steering process. To learn and practice the steering behavior of articulated vehicles, we developed a 3D driving simulator. The simulator can handle different types of articulated vehicles like semi-trailers, one- and two-axle trailers, or gigaliners. The use of a driving simulator offers many advantages over the use of real vehicles. One of the main advantages is the possibility to learn the steering behavior of all vehicle types. Drivers can be given more and better driving instructions like collision warnings or steering hints. Furthermore, the driver training costs can be reduced. Moreover, mistakes of the student do not lead to real damages and costly repairs. The hardware of the simulator consists of a low cost commercial driving stand with original truck parts, a projection of the windshield and two flat panel monitors for the left and right exterior mirrors. Standard PC hardware is used for controlling the driving stand and for generating the realtime 3D environment. Each aspect of the simulation like realistic vehicle movements or generation of different views, is handled by a specific software module. This flexible system can be easily extended which offers the opportunity for other uses than just driver training. Therefore, we use the simulator for the development and test of driver assistance systems.

To Fight or Not to Fight? Organizational and Doctrinal Trends in Mounted Maneuver Reconnaissance from the Interwar Years to Operation Iraqi Freedom

DTIC Science & Technology

2010-01-01

cavalry trainer developed to improve the preparation of cavalry leaders through the integrated use of radios and movie projectors—the forerunner of...ies of water without special equipment. In the support squad, two jeeps and a trailer carried an 81-mm mortar, its crew, and ammunition.83 These...them with a single 81-mm mortar. This weapon constituted the focal point of the support squad, which included two jeeps and two trailers . The latter

KSC-06pd0395

NASA Image and Video Library

2006-03-01

KENNEDY SPACE CENTER, FLA. - This aerial view shows the Press Site (in the foreground) comprising the NASA TV studio, the NASA News Center behind it, buildings used by local NBC and CBS television stations, and newly erected prefabricated buildings for local newspapers and correspondents for CNN, AP and others. A year-long project removed and replaced hurricane-damaged trailers and grandstands from the site. In the background, at right, is the newly built Operations Support Building II, which replaced modular housing and trailers in the Launch Complex 39 area. Photo credit: Cory Huston

Performance Testing of Jefferson Lab 12 GeV Helium Screw Compressors

DOE PAGES

Knudsen, P.; Ganni, V.; Dixon, K.; ...

2015-08-10

Oil injected screw compressors have essentially superseded all other types of compressors in modern helium refrigeration systems due to their large displacement capacity, reliability, minimal vibration, and capability of handling helium's high heat of compression. At the present state of compressor system designs for helium refrigeration systems, typically two-thirds of the lost input power is due to the compression system. It is important to understand the isothermal and volumetric efficiencies of these machines to help properly design the compression system to match the refrigeration process. It is also important to identify those primary compressor skid exergetic loss mechanisms which maymore » be reduced, thereby offering the possibility of significantly reducing the input power to helium refrigeration processes which are extremely energy intensive. This paper summarizes the results collected during the commissioning of the new compressor system for Jefferson Lab's (JLab's) 12 GeV upgrade. The compressor skid packages were designed by JLab and built to print by industry. They incorporate a number of modifications not typical of helium screw compressor packages and most importantly allow a very wide range of operation so that JLab's patented Floating Pressure Process can be fully utilized. This paper also summarizes key features of the skid design that allow this process and facilitate the maintenance and reliability of these helium compressor systems.« less

Performance Testing of Jefferson Lab 12 GeV Helium Screw Compressors

DOE Office of Scientific and Technical Information (OSTI.GOV)

Knudsen, P.; Ganni, V.; Dixon, K.

Oil injected screw compressors have essentially superseded all other types of compressors in modern helium refrigeration systems due to their large displacement capacity, reliability, minimal vibration, and capability of handling helium's high heat of compression. At the present state of compressor system designs for helium refrigeration systems, typically two-thirds of the lost input power is due to the compression system. It is important to understand the isothermal and volumetric efficiencies of these machines to help properly design the compression system to match the refrigeration process. It is also important to identify those primary compressor skid exergetic loss mechanisms which maymore » be reduced, thereby offering the possibility of significantly reducing the input power to helium refrigeration processes which are extremely energy intensive. This paper summarizes the results collected during the commissioning of the new compressor system for Jefferson Lab's (JLab's) 12 GeV upgrade. The compressor skid packages were designed by JLab and built to print by industry. They incorporate a number of modifications not typical of helium screw compressor packages and most importantly allow a very wide range of operation so that JLab's patented Floating Pressure Process can be fully utilized. This paper also summarizes key features of the skid design that allow this process and facilitate the maintenance and reliability of these helium compressor systems.« less

Forecasting the student-professor matches that result in unusually effective teaching.

PubMed

Gross, Jennifer; Lakey, Brian; Lucas, Jessica L; LaCross, Ryan; Plotkowski, Andrea R; Winegard, Bo

2015-03-01

Two important influences on students' evaluations of teaching are relationship and professor effects. Relationship effects reflect unique matches between students and professors such that some professors are unusually effective for some students, but not for others. Professor effects reflect inter-rater agreement that some professors are more effective than others, on average across students. We attempted to forecast students' evaluations of live lectures from brief, video-recorded teaching trailers. Participants were 145 college students (74% female) enrolled in introductory psychology courses at a public university in the Great Lakes region of the United States. Students viewed trailers early in the semester and attended live lectures months later. Because subgroups of students viewed the same professors, statistical analyses could isolate professor and relationship effects. Evaluations were influenced strongly by relationship and professor effects, and students' evaluations of live lectures could be forecasted from students' evaluations of teaching trailers. That is, we could forecast the individual students who would respond unusually well to a specific professor (relationship effects). We could also forecast which professors elicited better evaluations in live lectures, on average across students (professor effects). Professors who elicited unusually good evaluations in some students also elicited better memory for lectures in those students. It appears possible to forecast relationship and professor effects on teaching evaluations by presenting brief teaching trailers to students. Thus, it might be possible to develop online recommender systems to help match students and professors so that unusually effective teaching emerges. © 2014 The Authors. British Journal of Educational Psychology published by John Wiley & Sons Ltd on behalf of the British Psychological Society.

Freight Wing Trailer Aerodynamics

DOE Office of Scientific and Technical Information (OSTI.GOV)

Graham, Sean; Bigatel, Patrick

2004-10-17

Freight Wing Incorporated utilized the opportunity presented by this DOE category one Inventions and Innovations grant to successfully research, develop, test, patent, market, and sell innovative fuel and emissions saving aerodynamic attachments for the trucking industry. A great deal of past scientific research has demonstrated that streamlining box shaped semi-trailers can significantly reduce a truck's fuel consumption. However, significant design challenges have prevented past concepts from meeting industry needs. Market research early in this project revealed the demands of truck fleet operators regarding aerodynamic attachments. Products must not only save fuel, but cannot interfere with the operation of the truck,more » require significant maintenance, add significant weight, and must be extremely durable. Furthermore, SAE/TMC J1321 tests performed by a respected independent laboratory are necessary for large fleets to even consider purchase. Freight Wing used this information to create a system of three practical aerodynamic attachments for the front, rear and undercarriage of standard semi trailers. SAE/TMC J1321 Type II tests preformed by the Transportation Research Center (TRC) demonstrated a 7% improvement to fuel economy with all three products. If Freight Wing is successful in its continued efforts to gain market penetration, the energy and environmental savings would be considerable. Each truck outfitted saves approximately 1,100 gallons of fuel every 100,000 miles, which prevents over 12 tons of CO2 from entering the atmosphere. If all applicable trailers used the technology, the country could save approximately 1.8 billion gallons of diesel fuel, 18 million tons of emissions and 3.6 billion dollars annually.« less

21 CFR 888.4540 - Orthopedic manual surgical instrument.

Code of Federal Regulations, 2012 CFR

2012-04-01

..., femoral neck punch, socket pusher, reamer, rongeur, scissors, screwdriver, bone skid, staple driver, bone screw starter, surgical stripper, tamp, bone tap, trephine, wire twister, and wrench. (b) Classification...

21 CFR 888.4540 - Orthopedic manual surgical instrument.

Code of Federal Regulations, 2010 CFR

2010-04-01

..., femoral neck punch, socket pusher, reamer, rongeur, scissors, screwdriver, bone skid, staple driver, bone screw starter, surgical stripper, tamp, bone tap, trephine, wire twister, and wrench. (b) Classification...

21 CFR 888.4540 - Orthopedic manual surgical instrument.

Code of Federal Regulations, 2013 CFR

2013-04-01

..., femoral neck punch, socket pusher, reamer, rongeur, scissors, screwdriver, bone skid, staple driver, bone screw starter, surgical stripper, tamp, bone tap, trephine, wire twister, and wrench. (b) Classification...

21 CFR 888.4540 - Orthopedic manual surgical instrument.

Code of Federal Regulations, 2011 CFR

2011-04-01

..., femoral neck punch, socket pusher, reamer, rongeur, scissors, screwdriver, bone skid, staple driver, bone screw starter, surgical stripper, tamp, bone tap, trephine, wire twister, and wrench. (b) Classification...

21 CFR 888.4540 - Orthopedic manual surgical instrument.

Code of Federal Regulations, 2014 CFR

2014-04-01

..., femoral neck punch, socket pusher, reamer, rongeur, scissors, screwdriver, bone skid, staple driver, bone screw starter, surgical stripper, tamp, bone tap, trephine, wire twister, and wrench. (b) Classification...

Behavior of aircraft antiskid braking systems on dry and wet runway surfaces. A slip-velocity-controlled, pressure-bias-modulated system

NASA Technical Reports Server (NTRS)

Stubbs, S. M.; Tanner, J. A.; Smith, E. G.

1979-01-01

The braking and cornering response of a slip velocity controlled, pressure bias modulated aircraft antiskid braking system is investigated. The investigation, conducted on dry and wet runway surfaces, utilized one main gear wheel, brake, and tire assembly of a McDonnell Douglas DC 9 series 10 airplane. The landing gear strut was replaced by a dynamometer. The parameters, which were varied, included the carriage speed, tire loading, yaw angle, tire tread condition, brake system operating pressure, and runway wetness conditions. The effects of each of these parameters on the behavior of the skid control system is presented. Comparisons between data obtained with the skid control system and data obtained from single cycle braking tests without antiskid protection are examined.

Path-following control of wheeled planetary exploration robots moving on deformable rough terrain.

PubMed

Ding, Liang; Gao, Hai-bo; Deng, Zong-quan; Li, Zhijun; Xia, Ke-rui; Duan, Guang-ren

2014-01-01

The control of planetary rovers, which are high performance mobile robots that move on deformable rough terrain, is a challenging problem. Taking lateral skid into account, this paper presents a rough terrain model and nonholonomic kinematics model for planetary rovers. An approach is proposed in which the reference path is generated according to the planned path by combining look-ahead distance and path updating distance on the basis of the carrot following method. A path-following strategy for wheeled planetary exploration robots incorporating slip compensation is designed. Simulation results of a four-wheeled robot on deformable rough terrain verify that it can be controlled to follow a planned path with good precision, despite the fact that the wheels will obviously skid and slip.

Path-Following Control of Wheeled Planetary Exploration Robots Moving on Deformable Rough Terrain

PubMed Central

Ding, Liang; Gao, Hai-bo; Deng, Zong-quan; Li, Zhijun; Xia, Ke-rui; Duan, Guang-ren

2014-01-01

The control of planetary rovers, which are high performance mobile robots that move on deformable rough terrain, is a challenging problem. Taking lateral skid into account, this paper presents a rough terrain model and nonholonomic kinematics model for planetary rovers. An approach is proposed in which the reference path is generated according to the planned path by combining look-ahead distance and path updating distance on the basis of the carrot following method. A path-following strategy for wheeled planetary exploration robots incorporating slip compensation is designed. Simulation results of a four-wheeled robot on deformable rough terrain verify that it can be controlled to follow a planned path with good precision, despite the fact that the wheels will obviously skid and slip. PMID:24790582

Pegasus XL CYGNSS Arrival at CCAFS

NASA Image and Video Library

2016-12-02

The Orbital ATK L-1011 Stargazer aircraft has arrived at the Skid Strip at Cape Canaveral Air Force Station in Florida. Attached beneath the Stargazer is the Orbital ATK Pegasus XL with NASA's Cyclone Global Navigation Satellite System (CYGNSS) on board. CYGNSS was processed and prepared for its mission at Vandenberg Air Force Base in California. CYGNSS is scheduled for its airborne launch aboard the Pegasus XL rocket from the Skid Strip on Dec. 12. CYGNSS will make frequent and accurate measurements of ocean surface winds throughout the life cycle of tropical storms and hurricanes. The data that CYGNSS provides will enable scientists to probe key air-sea interaction processes that take place near the core of storms, which are rapidly changing and play a critical role in the beginning and intensification of hurricanes.

Pegasus XL CYGNSS Prepared for Launch Aboard Orbital ATK's L-101

NASA Image and Video Library

2016-12-10

At Cape Canaveral Air Force Station's Skid Strip the Orbital ATK L-1011 Stargazer aircraft is being prepared to launch NASA's Cyclone Global Navigation Satellite System, or CYGNSS, spacecraft. The eight micro satellites are aboard an Orbital ATK Pegasus XL rocket strapped to the underside of the Stargazer. CYGNSS is scheduled for its airborne launch aboard the Pegasus XL rocket from the Skid Strip on Dec. 12. CYGNSS will make frequent and accurate measurements of ocean surface winds throughout the life cycle of tropical storms and hurricanes. The data that CYGNSS provides will enable scientists to probe key air-sea interaction processes that take place near the core of storms, which are rapidly changing and play a critical role in the beginning and intensification of hurricanes.

Pegasus XL CYGNSS Arrival at CCAFS

NASA Image and Video Library

2016-12-02

The Orbital ATK L-1011 Stargazer aircraft begins its descent to the Skid Strip at Cape Canaveral Air Force Station in Florida. Attached beneath the Stargazer is the Orbital ATK Pegasus XL with NASA's Cyclone Global Navigation Satellite System (CYGNSS) on board. CYGNSS was processed and prepared for its mission at Vandenberg Air Force Base in California. CYGNSS is scheduled for its airborne launch aboard the Pegasus XL rocket from the Skid Strip on Dec. 12. CYGNSS will make frequent and accurate measurements of ocean surface winds throughout the life cycle of tropical storms and hurricanes. The data that CYGNSS provides will enable scientists to probe key air-sea interaction processes that take place near the core of storms, which are rapidly changing and play a critical role in the beginning and intensification of hurricanes.

A multi-institutional mobility model for regional deployment of Telesynergy telemedicine systems

PubMed Central

Schenken, Larry L; Heron, Dwight E; Saw, Cheng B; Proctor, Julian W

2010-01-01

Summary The Telesynergy workstation is a remote medical consultation system that provides medical staff with the means to collaborate with one another on cancer research and treatment. There are about 25 systems in use around the world. In order to share the equipment with five community hospital partners in Western Pennsylvania, we designed and implemented a transport system for the workstation. Small groups can be accommodated within the trailer and larger groups can participate inside a building when the system is offloaded at a suitable site. We designed special transport cases for the main components and chose a trailer suitable to move them by road. The transport cases were secured by inexpensive, ratchet style tiedown devices made of woven nylon webbing with steel end hooks. Calculations suggest that these restraints are sufficient to protect the equipment in a 48 km/h vehicle collision. During the first 12 months, we moved the trailer more than 700 km without system damage. Mobile videoconferencing seems to be successful on both environmental and cost grounds. PMID:19948703

Advertising Citizen Science: A Trailer for the Citizen Sky Project

NASA Astrophysics Data System (ADS)

Wyatt, Ryan; Price, A.

2012-01-01

Citizen Sky is a multi-year, NSF funded citizen science project involving the bright and mysterious variable star epsilon Aurigae. The project was conceived by the IYA 2009 working group on Research Experiences for Students, Teachers, and Citizen-Scientists. Citizen Sky goes beyond simple observing to include a major data analysis component, introducing participants to the full scientific process from background research to paper writing for a peer-reviewed journal. As a means of generating interest in the project, the California Academy of Sciences produced a six-minute "trailer” formatted for both traditional and fulldome planetariums as well as HD and web applications. This talk will review the production process for the trailer as well as the methods of distribution via planetariums, social media, and other venues_along with an update on the Citizen Sky Project as a whole. We will show how to use a small, professionally-produced planetarium trailer to help spread word on a citizen science project. We will also show preliminary results on a study about how participation level/type in the project affects science learning.

Novel method for on-road emission factor measurements using a plume capture trailer.

PubMed

Morawska, L; Ristovski, Z D; Johnson, G R; Jayaratne, E R; Mengersen, K

2007-01-15

The method outlined provides for emission factor measurements to be made for unmodified vehicles driving under real world conditions at minimal cost. The method consists of a plume capture trailer towed behind a test vehicle. The trailer collects a sample of the naturally diluted plume in a 200 L conductive bag and this is delivered immediately to a mobile laboratory for subsequent analysis of particulate and gaseous emissions. The method offers low test turnaround times with the potential to complete much larger numbers of emission factor measurements than have been possible using dynamometer testing. Samples can be collected at distances up to 3 m from the exhaust pipe allowing investigation of early dilution processes. Particle size distribution measurements, as well as particle number and mass emission factor measurements, based on naturally diluted plumes are presented. A dilution profile relating the plume dilution ratio to distance from the vehicle tail pipe for a diesel passenger vehicle is also presented. Such profiles are an essential input for new mechanistic roadway air quality models.

Baseline Design Compliance Matrix for the Rotary Mode Core Sampling System

DOE Office of Scientific and Technical Information (OSTI.GOV)

LECHELT, J.A.

2000-10-17

The purpose of the design compliance matrix (DCM) is to provide a single-source document of all design requirements associated with the fifteen subsystems that make up the rotary mode core sampling (RMCS) system. It is intended to be the baseline requirement document for the RMCS system and to be used in governing all future design and design verification activities associated with it. This document is the DCM for the RMCS system used on Hanford single-shell radioactive waste storage tanks. This includes the Exhauster System, Rotary Mode Core Sample Trucks, Universal Sampling System, Diesel Generator System, Distribution Trailer, X-Ray Cart System,more » Breathing Air Compressor, Nitrogen Supply Trailer, Casks and Cask Truck, Service Trailer, Core Sampling Riser Equipment, Core Sampling Support Trucks, Foot Clamp, Ramps and Platforms and Purged Camera System. Excluded items are tools such as light plants and light stands. Other items such as the breather inlet filter are covered by a different design baseline. In this case, the inlet breather filter is covered by the Tank Farms Design Compliance Matrix.« less

Ambient noise levels in mobile audiometric testing facilities: compliance with industry standards.

PubMed

Lankford, J E; Perrone, D C; Thunder, T D

1999-04-01

Excessive ambient noise levels in audiometric test booths may elevate and therefore invalidate hearing thresholds of employees included in a hearing conservation program. This study was conducted to determine if a sample of mobile test vans and trailers operating in the Midwest met the 1983 Occupational Safety and Health Administration (OSHA) maximum permissible ambient noise levels (MPANLs), the MPANLs in the American National Standards Institute (ANSI) S3.1-1991, and the suggested National Hearing Conservation Association (NHCA) values. Ambient noise levels were measured in 13 audiometric test booths contained in 12 different industrial mobile test vans and trailers operating in the Midwest. Results indicated that all 13 (100%) of the industrial mobile test vans and trailers evaluated complied with 1983 OSHA permissible levels and the NHCA 1996 recommended levels. With regard to the 1991 ANSI MPANLs, 5 (38%) of the 13 booths were in compliance at all frequencies. Those that failed did so at 125, 250, and 500 Hz. It appears that the NHCA levels need to be used for all hearing conservation programs with respect to compliance for noise levels in mobile audiometric test booths.

Cascading a systolic array and a feedforward neural network for navigation and obstacle avoidance using potential fields

NASA Technical Reports Server (NTRS)

Plumer, Edward S.

1991-01-01

A technique is developed for vehicle navigation and control in the presence of obstacles. A potential function was devised that peaks at the surface of obstacles and has its minimum at the proper vehicle destination. This function is computed using a systolic array and is guaranteed not to have local minima. A feedfoward neural network is then used to control the steering of the vehicle using local potential field information. In this case, the vehicle is a trailer truck backing up. Previous work has demonstrated the capability of a neural network to control steering of such a trailer truck backing to a loading platform, but without obstacles. Now, the neural network was able to learn to navigate a trailer truck around obstacles while backing toward its destination. The network is trained in an obstacle free space to follow the negative gradient of the field, after which the network is able to control and navigate the truck to its target destination in a space of obstacles which may be stationary or movable.

40 CFR 204.51 - Definitions.

Code of Federal Regulations, 2014 CFR

2014-07-01

... compressor or compressor means any wheel, skid, truck, or railroad car mounted, but not self-propelled... reciprocating rotary or turbine engine rigidly connected in permanent alignment and mounted on a common frame...

40 CFR 204.51 - Definitions.

Code of Federal Regulations, 2012 CFR

2012-07-01

... compressor or compressor means any wheel, skid, truck, or railroad car mounted, but not self-propelled... reciprocating rotary or turbine engine rigidly connected in permanent alignment and mounted on a common frame...

40 CFR 204.51 - Definitions.

Code of Federal Regulations, 2013 CFR

2013-07-01

... compressor or compressor means any wheel, skid, truck, or railroad car mounted, but not self-propelled... reciprocating rotary or turbine engine rigidly connected in permanent alignment and mounted on a common frame...

40 CFR 266.20 - Applicability.

Code of Federal Regulations, 2010 CFR

2010-07-01

... contain. (c) Anti-skid/deicing uses of slags, which are generated from high temperature metals recovery...) Fertilizers that contain recyclable materials are not subject to regulation provided that: (1) They are zinc...

40 CFR 266.20 - Applicability.

Code of Federal Regulations, 2011 CFR

2011-07-01

... contain. (c) Anti-skid/deicing uses of slags, which are generated from high temperature metals recovery...) Fertilizers that contain recyclable materials are not subject to regulation provided that: (1) They are zinc...

Determination of influence factors and accident rates for the Armored Tractor/Safe Secure Trailer

DOE Office of Scientific and Technical Information (OSTI.GOV)

Phillips, J.S.; Clauss, D.B.; Blower, D.F.

1994-04-01

Operating environments, such as road type, road location, and time of day, play an important role in the observed accident rates of heavy trucks used in general commerce. These same factors influence the accident rate of the Armored Tractor/Safe Secure Trailer (AT/SST) used by the Department of Energy to transport hazardous cargos within the continental United States. This report discusses the development of accident rate influence factors. These factors, based on heavy trucks used in general commerce, are used to modify the observed overall AT/SST accident rate to account for the different operating environments.

Aerodynamic drag reduction tests on a full-scale tractor-trailer combination with several add-on devices

NASA Technical Reports Server (NTRS)

Montoya, L. C.; Steers, L. L.

1974-01-01

Aerodynamic drag tests were performed on a conventional cab-over-engine tractor with a 45-foot trailer and five commercially available or potentially available add-on devices using the coast-down method. The tests ranged in velocity from approximately 30 miles per hour to 65 miles per hour and included some flow visualization. A smooth, level runway at Edwards Air Force Base was used for the tests, and deceleration measurements were taken with both accelerometers and stopwatches. An evaluation of the drag reduction results obtained with each of the five add-on devices is presented.

Horse Injury during Non-Commercial Transport: Findings from Researcher-Assisted Intercept Surveys at Southeastern Australian Equestrian Events

PubMed Central

Riley, Christopher B.; Noble, Belinda R.; Bridges, Janis; Hazel, Susan J.; Thompson, Kirrilly

2016-01-01

Simple Summary Research on the transportation of horses has largely focused on the movement of horses by commercial livestock carriers. Information on factors associated with horse injuries sustained during private (non-commercial) transportation in small horse trucks and trailers is limited. This study surveyed drivers transporting their horses to equestrian events in southeastern Australia. Information on drivers, travel practice, vehicle characteristics and horse injury was collected. A total of 55/223 (24.7%) participants reported transportation related injuries to their horses. Of these 72% were described as horse associated (scrambling, slipping and horse-horse interaction), 11% due to mechanical failure, and 6% due to driver error. The risk of horse injury was not associated with driver age or gender, or experience. Drivers that answer the telephone whilst transporting horses, were more likely to report a previous injury experience. There was a trend for participants with <8 hours sleep prior to the survey to have previously had a horse injured. There was a modest positive association between increasing trailer age and the number of injuries. The range of trailer models prevented identification of the importance of individual design features. The study highlights the potential for horses to sustain transportation injuries in privately owned vehicles and warrants further study to address this risk to their welfare. Abstract Equine transportation research has largely focused on the commercial land movement of horses. Data on the incidence and factors associated with horse injuries during non-commercial transportation (privately owned horse trucks and trailers) is scant. This study surveyed 223 drivers transporting horses to 12 equestrian events in southeastern Australia. Data collected encompassed driver demographics, travel practice, vehicle characteristics, and incidents involving horse injury. Approximately 25% (55/223) of participants reported that their horses were injured during transportation. Of these 72% were owner classified as horse associated (scrambling, slipping and horse-horse interaction), 11% due to mechanical failure, and 6% due to driver error. Horse injury was not significantly associated with driver age, gender, or experience. Participants that answer the telephone whilst driving were more likely to have previously had a horse injured (p = 0.04). There was a trend for participants with <8 hours sleep prior to the survey to have experienced a previous transportation-related injury (p = 0.056). Increased trailer age was associated with a greater number of injury reports (r² = 0.20; p < 0.04). The diversity in trailer models prevented identification of the importance of individual design features. This study highlights the potential for horses to sustain transportation injuries in privately owned vehicles and warrants further study to address this risk to their welfare. PMID:27792128

Antiskid braking system

NASA Technical Reports Server (NTRS)

Pazdera, J. S.

1974-01-01

Published report describes analytical development and simulation of braking system. System prevents wheels from skidding when brakes are applied, significantly reducing stopping distance. Report also presents computer simulation study on system as applied to aircraft.

Evaluation of Skid Resistance of Wearing Course Made Of Stone Mastic Asphalt Mixture in Laboratory Conditions

NASA Astrophysics Data System (ADS)

Wasilewska, Marta

2017-10-01

This paper presents the comparison of skid resistance of wearing course made of SMA (Stone Mastic Asphalt) mixtures which differ in resistance to polishing of coarse aggregate. Dolomite, limestone, granite and trachybasalt were taken for investigation. SMA mixtures have the same nominal size of aggregate (11 mm) and very similar aggregate particle-size distribution in mineral mixtures. Tested SMA11 mixtures were designed according to EN 13108-5 and Polish National Specification WT-2: 2014. Evaluation of the skid resistance has been performed using the FAP (Friction After Polishing) test equipment also known as the Wehner/Schulze machine. Laboratory method enables to compare the skid resistance of different types of mixtures under specified conditions simulating polishing processes. Tests were performed on both the specimens made of each coarse aggregate and SMA11 mixtures containing these aggregates. Measuring of friction coefficient μm was conducted before and during polishing process up to 180 0000 passes of polishing head. Comparison of the results showed differences in sensitivity to polishing among particular mixtures which depend on the petrographic properties of rock used to produce aggregate. Limestone and dolomite tend to have a fairly uniform texture with low hardness which makes these rock types susceptible to rapid polishing. This caused lower coefficient of friction for SMA11 mixtures with limestone and dolomite in comparison with other test mixtures. These significant differences were already registered at the beginning of the polishing process. Limestone aggregate had lower value of μm before starting the process than trachybasalt and granite aggregate after its completion. Despite the differences in structure and mineralogical composition between the granite and trachybasalt, slightly different values of the friction coefficient at the end of polishing were obtained. Images of the surface were taken with the optical microscope for better understanding of the phenomena occurring on the surface of specimen. Results may be valuable information when selecting aggregate to asphalt mixtures at the stage of its design and maintenance of existing road pavements.

EPA Nonregulatory Nonroad Duty Cycles

EPA Pesticide Factsheets

EPA nonregulatory, nonroad duty cycles for equipment such as agricultural tractors, backhoe loaders,crawlers tractors, excavators, arc welding skid steer loaders, and wheel loaders. Also,test procedures, laboratory methods, and emissions for this equipmen

48 CFR 47.305-1 - Solicitation requirements.

Code of Federal Regulations, 2012 CFR

2012-10-01

... much of the following data as is applicable to the particular acquisition: (a) Modes of transportation... packaging; e.g., box, carton, crate, drum, bundle, skids, and when applicable, package number from the...

48 CFR 47.305-1 - Solicitation requirements.

Code of Federal Regulations, 2013 CFR

2013-10-01

... much of the following data as is applicable to the particular acquisition: (a) Modes of transportation... packaging; e.g., box, carton, crate, drum, bundle, skids, and when applicable, package number from the...

48 CFR 47.305-1 - Solicitation requirements.

Code of Federal Regulations, 2014 CFR

2014-10-01

... much of the following data as is applicable to the particular acquisition: (a) Modes of transportation... packaging; e.g., box, carton, crate, drum, bundle, skids, and when applicable, package number from the...

48 CFR 47.305-1 - Solicitation requirements.

Code of Federal Regulations, 2011 CFR

2011-10-01

... much of the following data as is applicable to the particular acquisition: (a) Modes of transportation... packaging; e.g., box, carton, crate, drum, bundle, skids, and when applicable, package number from the...

48 CFR 47.305-1 - Solicitation requirements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... much of the following data as is applicable to the particular acquisition: (a) Modes of transportation... packaging; e.g., box, carton, crate, drum, bundle, skids, and when applicable, package number from the...

Pressurized Lunar Rover (PLR)

NASA Technical Reports Server (NTRS)

Creel, Kenneth; Frampton, Jeffrey; Honaker, David; Mcclure, Kerry; Zeinali, Mazyar; Bhardwaj, Manoj; Bulsara, Vatsal; Kokan, David; Shariff, Shaun; Svarverud, Eric

1992-01-01

The objective of this project was to design a manned pressurized lunar rover (PLR) for long-range transportation and for exploration of the lunar surface. The vehicle must be capable of operating on a 14-day mission, traveling within a radius of 500 km during a lunar day or within a 50-km radius during a lunar night. The vehicle must accommodate a nominal crew of four, support two 28-hour EVA's, and in case of emergency, support a crew of six when near the lunar base. A nominal speed of ten km/hr and capability of towing a trailer with a mass of two mt are required. Two preliminary designs have been developed by two independent student teams. The PLR 1 design proposes a seven meter long cylindrical main vehicle and a trailer which houses the power and heat rejection systems. The main vehicle carries the astronauts, life support systems, navigation and communication systems, lighting, robotic arms, tools, and equipment for exploratory experiments. The rover uses a simple mobility system with six wheels on the main vehicle and two on the trailer. The nonpressurized trailer contains a modular radioisotope thermoelectric generator (RTG) supplying 6.5 kW continuous power. A secondary energy storage for short-term peak power needs is provided by a bank of lithium-sulfur dioxide batteries. The life support system is partly a regenerative system with air and hygiene water being recycled. A layer of water inside the composite shell surrounds the command center allowing the center to be used as a safe haven during solar flares. The PLR 1 has a total mass of 6197 kg. It has a top speed of 18 km/hr and is capable of towing three metric tons, in addition to the RTG trailer. The PLR 2 configuration consists of two four-meter diameter, cylindrical hulls which are passively connected by a flexible passageway, resulting in the overall vehicle length of 11 m. The vehicle is driven by eight independently suspended wheels. The dual-cylinder concept allows articulated as well as double Ackermann steering. The primary power of 8 kW is supplied by a dynamic isotope system using a closed Brayton cycle with a xenon-hydrogen mixture as the working fluid. A sodium-sulfur battery serves as the secondary power source. Excess heat produced by the primary power system and other rover systems is rejected by radiators located on the top of the rear cylinder. The total mass of the PLR 2 is 7015 kg. Simplicity and low total weight have been the driving principles behind the design of PLR 1. The overall configuration consists of a 7-m-long, 3-m-diameter cylindrical main vehicle and a two-wheeled trailer. The cylinder of the main body is capped by eight-section, faceted, semi-hemispherical ends. The trailer contains the RTG power source and is not pressurized. The shell of the main body is constructed of a layered carbon fiber/foam/Kevlar sandwich structure. Included in the shell is a layer of water for radiation protection. The layer of water extends from the front of the rover over the crew compartment and creates a safe haven for the crew during a solar flare-up. The carbon fiber provides the majority of the strength and stiffness and the Kevlar provides protection from micrometeoroids. The Kevlar is covered with a gold foil and multi-layer insulation (MLI) to reduce radiation degradation and heat transfer through the wall. A thin thermoplastic layer seals the fiber and provides additional strength.

Pressurized Lunar Rover (PLR)

NASA Astrophysics Data System (ADS)

Creel, Kenneth; Frampton, Jeffrey; Honaker, David; McClure, Kerry; Zeinali, Mazyar; Bhardwaj, Manoj; Bulsara, Vatsal; Kokan, David; Shariff, Shaun; Svarverud, Eric

The objective of this project was to design a manned pressurized lunar rover (PLR) for long-range transportation and for exploration of the lunar surface. The vehicle must be capable of operating on a 14-day mission, traveling within a radius of 500 km during a lunar day or within a 50-km radius during a lunar night. The vehicle must accommodate a nominal crew of four, support two 28-hour EVA's, and in case of emergency, support a crew of six when near the lunar base. A nominal speed of ten km/hr and capability of towing a trailer with a mass of two mt are required. Two preliminary designs have been developed by two independent student teams. The PLR 1 design proposes a seven meter long cylindrical main vehicle and a trailer which houses the power and heat rejection systems. The main vehicle carries the astronauts, life support systems, navigation and communication systems, lighting, robotic arms, tools, and equipment for exploratory experiments. The rover uses a simple mobility system with six wheels on the main vehicle and two on the trailer. The nonpressurized trailer contains a modular radioisotope thermoelectric generator (RTG) supplying 6.5 kW continuous power. A secondary energy storage for short-term peak power needs is provided by a bank of lithium-sulfur dioxide batteries. The life support system is partly a regenerative system with air and hygiene water being recycled. A layer of water inside the composite shell surrounds the command center allowing the center to be used as a safe haven during solar flares. The PLR 1 has a total mass of 6197 kg. It has a top speed of 18 km/hr and is capable of towing three metric tons, in addition to the RTG trailer. The PLR 2 configuration consists of two four-meter diameter, cylindrical hulls which are passively connected by a flexible passageway, resulting in the overall vehicle length of 11 m. The vehicle is driven by eight independently suspended wheels. The dual-cylinder concept allows articulated as well as double Ackermann steering. The primary power of 8 kW is supplied by a dynamic isotope system using a closed Brayton cycle with a xenon-hydrogen mixture as the working fluid.

Blended aggregate study : final report.

DOT National Transportation Integrated Search

1980-03-01

Louisiana produces no naturally occurring skid resistant aggregate and, therefore, must import these aggregates at great expense. : In an effort to extend the yield of these aggregates, a laboratory investigation was initiated to determine the feasib...

More Experiments and Calculations.

ERIC Educational Resources Information Center

Siddons, J. C.

1984-01-01

Describes two experiments that illustrate basic ideas but would be difficult to carry out. Also presents activities and experiments on rainbow cups, electrical charges, electrophorus calculation, pulse electrometer, a skidding car, and on the Oersted effect. (JN)

30 CFR 250.1700 - What do the terms “decommissioning”, “obstructions”, and “facility” mean?

Code of Federal Regulations, 2010 CFR

2010-07-01

... assemblies, umbilicals, manifolds, termination skids, production and pipeline risers, platforms, templates... on the OCS. Facilities include production and pipeline risers, templates, pilings, and any other...

46 CFR 160.042-1 - Applicable specification.

Code of Federal Regulations, 2010 CFR

2010-10-01

... specification. (a) The following specification, of the issue in effect on the date life raft skids are manufactured, forms a part of this subpart: (1) Coast Guard specification: 160.018, Life Rafts. (b) [Reserved] ...

KSC-20161214-JBS-MH-01-0001-L_1011_Pegasus_XL_CYGNSS-3139565_HEVC

NASA Image and Video Library

2016-12-14

The Orbital ATK L-1011 Stargazer aircraft is at the Skid Strip at Cape Canaveral Air Force Station in Florida. Attached beneath the Stargazer is the Orbital ATK Pegasus XL with NASA's Cyclone Global Navigation Satellite System (CYGNSS) on board. CYGNSS was processed and prepared for its mission at Vandenberg Air Force Base in California. CYGNSS is scheduled for its airborne launch aboard the Pegasus XL rocket from the Skid Strip on Dec. 15. CYGNSS will make frequent and accurate measurements of ocean surface winds throughout the life cycle of tropical storms and hurricanes. The data that CYGNSS provides will enable scientists to probe key air-sea interaction processes that take place near the core of storms, which are rapidly changing and play a critical role in the beginning and intensification of hurricanes.

SNS Cryogenic Test Facility Kinney Vacuum Pump Commissioning and Operation at 2 K

NASA Astrophysics Data System (ADS)

DeGraff, B.; Howell, M.; Kim, S.; Neustadt, T.

2017-12-01

The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL) has built and commissioned an independent Cryogenic Test Facility (CTF) in support of testing in the Radio-frequency Test Facility (RFTF). Superconducting Radio-frequency Cavity (SRF) testing was initially conducted with the CTF cold box at 4.5 K. A Kinney vacuum pump skid consisting of a roots blower with a liquid ring backing pump was recently added to the CTF system to provide testing capabilities at 2 K. System design, pump refurbishment and installation of the Kinney pump will be presented. During the commissioning and initial testing period with the Kinney pump, several barriers to achieve reliable operation were experienced. Details of these lessons learned and improvements to skid operations will be presented. Pump capacity data will also be presented.

SNS Cryogenic Test Facility Kinney Vacuum Pump Commissioning and Operation at 2 K

DOE Office of Scientific and Technical Information (OSTI.GOV)

Degraff, Brian D.; Howell, Matthew P.; Kim, Sang-Ho

The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL) has built and commissioned an independent Cryogenic Test Facility (CTF) in support of testing in the Radio-frequency Test Facility (RFTF). Superconducting Radio-frequency Cavity (SRF) testing was initially conducted with the CTF cold box at 4.5 K. A Kinney vacuum pump skid consisting of a roots blower with a liquid ring backing pump was recently added to the CTF system to provide testing capabilities at 2 K. System design, pump refurbishment and installation of the Kinney pump will be presented. During the commissioning and initial testing period with the Kinneymore » pump, several barriers to achieve reliable operation were experienced. Details of these lessons learned and improvements to skid operations will be presented. Pump capacity data will also be presented.« less

Pegasus XL CYGNSS Arrival at CCAFS

NASA Image and Video Library

2016-12-02

The Orbital ATK L-1011 Stargazer aircraft touches down at 3:57 p.m. EST at the Skid Strip at Cape Canaveral Air Force Station in Florida. Attached beneath the Stargazer is the Orbital ATK Pegasus XL with NASA's Cyclone Global Navigation Satellite System (CYGNSS) on board. CYGNSS was processed and prepared for its mission at Vandenberg Air Force Base in California. CYGNSS is scheduled for its airborne launch aboard the Pegasus XL rocket from the Skid Strip on Dec. 12. CYGNSS will make frequent and accurate measurements of ocean surface winds throughout the life cycle of tropical storms and hurricanes. The data that CYGNSS provides will enable scientists to probe key air-sea interaction processes that take place near the core of storms, which are rapidly changing and play a critical role in the beginning and intensification of hurricanes.

A study on single lane-change manoeuvres for determining rearward amplification of multi-trailer articulated heavy vehicles with active trailer steering systems

NASA Astrophysics Data System (ADS)

Wang, Qiushi; He, Yuping

2016-01-01

The Society of Automotive Engineers issued a test procedure, SAE-J2179, to determine the rearward amplification (RA) of multi-trailer articulated heavy vehicles (MTAHVs). Built upon the procedure, the International Organization for Standardization released the test manoeuvres, ISO-14791, for evaluating directional performance of MTAHVs. For the RA measures, ISO-14791 recommends two single lane-change manoeuvres: (1) an open-loop procedure with a single sine-wave steering input; and (2) a closed-loop manoeuvre with a single sine-wave lateral acceleration input. For an articulated vehicle with active trailer steering (ATS), the RA measure in lateral acceleration under the open-loop manoeuvre was not in good agreement with that under the closed-loop manoeuvre. This observation motivates the research on the applicability of the two manoeuvres for the RA measures of MTAHVs with ATS. It is reported that transient response under the open-loop manoeuvre often leads to asymmetric curve of tractor lateral acceleration [Winkler CB, Fancher PS, Bareket Z, Bogard S, Johnson G, Karamihas S, Mink C. Heavy vehicle size and weight - test procedures for minimum safety performance standards. Final technical report, NHTSA, US DOT, contract DTNH22-87-D-17174, University of Michigan Transportation Research Institute, Report No. UMTRI-92-13; 1992]. To explore the effect of the transient response, a multiple cycle sine-wave steering input (MCSSI) manoeuvre is proposed. Simulation demonstrates that the steady-state RA measures of an MTAHV with and without ATS under the MCSSI manoeuvre are in excellent agreement with those under the closed-loop manoeuvre. It is indicated that between the two manoeuvres by ISO-14791, the closed-loop manoeuvre is more applicable for determining the RA measures of MTAHVs with ATS.

Latex-modified concrete overlay containing Type K cement.

DOT National Transportation Integrated Search

2005-01-01

Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of water and chloride ions and to improve skid resistance, ride quality, and surface appearance. Constructed in accordance with prescription specifications, s...

Development of surface friction guidelines for LADOTD : tech summary.

DOT National Transportation Integrated Search

2012-04-01

The current Louisiana Department of Transportation and Development (LADOTD) surface friction guidelines deal with the polished : stone values (PSV) of coarse aggregates (which is a relative British Pendulum skid-resistance number measured on polished...

Data system for planning maintenance resurfacing.

DOT National Transportation Integrated Search

1973-01-01

Planning for maintenance resurfacing in the Virginia Department of Highways is becoming an increasingly complex and important function. Increasing highway mileage and traffic volumes, as well as other requirements such as maintaining a minimum skid r...

30 CFR 250.1700 - What do the terms “decommissioning”, “obstructions”, and “facility” mean?

Code of Federal Regulations, 2013 CFR

2013-07-01

... trees, jumper assemblies, umbilicals, manifolds, termination skids, production and pipeline risers... attached to the seabed on the OCS. Facilities include production and pipeline risers, templates, pilings...

30 CFR 250.1700 - What do the terms “decommissioning”, “obstructions”, and “facility” mean?

Code of Federal Regulations, 2014 CFR

2014-07-01

... trees, jumper assemblies, umbilicals, manifolds, termination skids, production and pipeline risers... attached to the seabed on the OCS. Facilities include production and pipeline risers, templates, pilings...

30 CFR 250.1700 - What do the terms “decommissioning”, “obstructions”, and “facility” mean?

Code of Federal Regulations, 2012 CFR

2012-07-01

... trees, jumper assemblies, umbilicals, manifolds, termination skids, production and pipeline risers... attached to the seabed on the OCS. Facilities include production and pipeline risers, templates, pilings...

Underinflated tires in the United States

DOT National Transportation Integrated Search

2007-02-09

Underinflated tires impact a drivers ability to control a vehicle against skidding, blowouts, and other tire failures. While not a leading cause of highway accidents and fatalities, a NHTSA study shows that, in 1999, underinflated tires contribute...

Automated skid data system.

DOT National Transportation Integrated Search

1975-01-01

The Data Systems and Analysis Section of the Virginia Highway & Transportation Research Council has been involved for sometime in the development of automated information systems for various types of roadway data. One of these systems, and the system...

A pavement management research program for Oregon highways : final report.

DOT National Transportation Integrated Search

1989-12-01

An extensive program was developed to measure pavement deflection skid resistance, and rideability throughout Oregon. The data from those "objective" measures were then evaluated for correlations with observed pavement distress and traffic factors. :...

JPSS-1 Spacecraft Canning and Lift to Transport Trailer

NASA Image and Video Library

2017-10-23

In the Astrotech Processing Facility at Vandenberg Air Force Base in California, technicians and engineers place the Joint Polar Satellite System-1, or JPSS-1, spacecraft in a protective container. It then will be mounted on a transport trailer for its move to Space Launch Complex 2. At the pad, JPSS-1 will be lifted for mating atop a United Launch Alliance Delta II rocket. Built by Ball Aerospace and Technologies Corp. of Boulder, Colorado, JPSS is the first in a series four next-generation environmental satellites in a collaborative program between the NOAA and NASA. Liftoff is scheduled to take place from Vandenberg's Space Launch Complex 2.

JPSS-1 Spacecraft Canning and Lift to Transport Trailer

NASA Image and Video Library

2017-10-23

At Vandenberg Air Force Base in California, technicians and engineers have placed the Joint Polar Satellite System-1, or JPSS-1, spacecraft in a protective container. It then will be mounted on a transport trailer for its move from the Astrotech Processing Facility to Space Launch Complex 2. At the pad, JPSS-1 will be lifted for mating atop a United Launch Alliance Delta II rocket. Built by Ball Aerospace and Technologies Corp. of Boulder, Colorado, JPSS is the first in a series four next-generation environmental satellites in a collaborative program between the NOAA and NASA. Liftoff is scheduled to take place from Vandenberg's Space Launch Complex 2.

JPSS-1 Spacecraft Canning and Lift to Transport Trailer

NASA Image and Video Library

2017-10-23

In the Astrotech Processing Facility at Vandenberg Air Force Base in California, technicians and engineers place the Joint Polar Satellite System-1, or JPSS-1, spacecraft in a protective container. It is then mounted on a transport trailer for its move to Space Launch Complex 2. At the pad, JPSS-1 will be lifted for mating atop a United Launch Alliance Delta II rocket. Built by Ball Aerospace and Technologies Corp. of Boulder, Colorado, JPSS is the first in a series four next-generation environmental satellites in a collaborative program between the NOAA and NASA. Liftoff is scheduled to take place from Vandenberg's Space Launch Complex 2.

Optimization of vehicle-trailer connection systems

NASA Astrophysics Data System (ADS)

Sorge, F.

2016-09-01

The three main requirements of a vehicle-trailer connection system are: en route stability, over- or under-steering restraint, minimum off-tracking along curved path. Linking the two units by four-bar trapeziums, wider stability margins may be attained in comparison with the conventional pintle-hitch for both instability types, divergent or oscillating. The stability maps are traced applying the Hurwitz method or the direct analysis of the characteristic equation at the instability threshold. Several types of four-bar linkages may be quickly tested, with the drawbars converging towards the trailer or the towing unit. The latter configuration appears preferable in terms of self-stability and may yield high critical speeds by optimising the geometrical and physical properties. Nevertheless, the system stability may be improved in general by additional vibration dampers in parallel with the connection linkage. Moreover, the four-bar connection may produce significant corrections of the under-steering or over-steering behaviour of the vehicle-train after a steering command from the driver. The off- tracking along the curved paths may be also optimized or kept inside prefixed margins of acceptableness. Activating electronic stability systems if necessary, fair results are obtainable for both the steering conduct and the off-tracking.

Pressurized Lunar Rover

NASA Technical Reports Server (NTRS)

Creel, Kenneth; Frampton, Jeffrey; Honaker, David; Mcclure, Kerry; Zeinali, Mazyar

1992-01-01

The pressurized lunar rover (PLR) consists of a 7 m long, 3 m diameter cylindrical main vehicle and a trailer which houses the power and heat rejection systems. The main vehicle carries the astronauts, life support systems, navigation and communication systems, directional lighting, cameras, and equipment for exploratory experiments. The PLR shell is constructed of a layered carbon-fiber/foam composite. The rover has six 1.5 m diameter wheels on the main body and two 1.5 m diameter wheels on the trailer. The wheels are constructed of composites and flex to increase traction and shock absorption. The wheels are each attached to a double A-arm aluminum suspension, which allows each wheel 1 m of vertical motion. In conjunction with a 0.75 m ground clearance, the suspension aids the rover in negotiating the uneven lunar terrain. The 15 N-m torque brushless electric motors are mounted with harmonic drive units inside each of the wheels. The rover is steered by electrically varying the speeds of the wheels on either side of the rover. The PLR trailer contains a radiosotope thermoelectric generator providing 6.7 kW. A secondary back-up energy storage system for short-term high-power needs is provided by a bank of batteries. The trailer can be detached to facilitate docking of the main body with the lunar base via an airlock located in the rear of the PLR. The airlock is also used for EVA operation during missions. Life support is a partly regenerative system with air and hygiene water being recycled. A layer of water inside the composite shell surrounds the command center. The water absorbs any damaging radiation, allowing the command center to be used as a safe haven during solar flares. Guidance, navigation, and control are supplied by a strapdown inertial measurement unit that works with the on-board computer. Star mappers provide periodic error correction. The PLR is capable of voice, video, and data transmission. It is equipped with two 5 W X-band transponder, allowing simultaneous transmission and reception. An S-band transponder is used to communicate with the crew during EVA. The PLR has a total mass of 6197 kg. It has a nominal speed of 10 km/hr and a top speed of 18 km/hr. The rover is capable of towing 3 metric tons (in addition to the RTG trailer).

Validation of TxDOT flexible pavement skid prediction model : workshop : student guide.

DOT National Transportation Integrated Search

2017-05-01

Course Materials: : Background summary of Research Project 0-5627. : Short presentation of research tasks and findings from Research Project 0-6746. : Aggregate characterization with Aggregate Imaging Measurement System (AIMS) and Micro-D...

Improving Word Similarity by Augmenting PMI with Estimates of Word Polysemy

DTIC Science & Technology

2011-12-29

radiator, brake , throttle, speeding, uptown, curb, auto, skid, balloon, truck, refrigerator, driver, downtown, parachute, gasoline, steering, spin...chauffeur, garage, motor, trolley, locomotive, conductor, automobile, limousine, freight, headlight, train, driver, brake , siding, passenger, engine

Relating surface texture of rigid pavement with noise and skid resistance

DOT National Transportation Integrated Search

2004-01-01

Although pavements are initially designed to be durable for specified traffic loads, they must also satisfy other functional characteristics, primarily safety, smoothness and comfort (noise generation). Frequently, there are necessary trade-offs for ...

Performance specification for high performance concrete overlays on bridges.

DOT National Transportation Integrated Search

2004-01-01

Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of water and chloride ions and to improve skid resistance, ride quality, and surface appearance. Constructed in accordance with prescription specifications, s...

14 CFR 25.1303 - Flight and navigation instruments.

Code of Federal Regulations, 2010 CFR

2010-01-01

... a slip-skid indicator is required on large airplanes with a third attitude instrument system useable through flight attitudes of 360° of pitch and roll and installed in accordance with § 121.305(k) of this...

Engaging homeless youth in community-based participatory research: a case study from Skid Row, Los Angeles.

PubMed

Garcia, Analilia P; Minkler, Meredith; Cardenas, Zelenne; Grills, Cheryl; Porter, Charles

2014-01-01

Growing evidence highlights the benefits to youth of involvement in community-based participatory research. Less attention has been paid, however, to the contributions youth can make to helping change health-promoting policy through such work. We describe a multi-method case study of a policy-focused community-based participatory research project in the Skid Row area of downtown Los Angeles, California, where a small group of homeless youth worked with adult mentors to develop and conduct a survey of 96 homeless youth and used the findings to help secure health-promoting policy change. We review the partnership's work at each stage of the policy-making process; its successes in changing policy regarding recreation, juvenile justice, and education; and the challenges encountered, especially with policy enforcement. We share lessons learned, including the importance of strong adult mentors and of policy environments conducive to sustainable, health-promoting change for marginalized youth.

Acceptance test report for portable exhauster POR-007/Skid E

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kriskovich, J.R.

1998-07-24

This document describes Acceptance Testing performed on Portable Exhauster POR-007/Skid E. It includes measurements of bearing vibration levels, pressure decay testing, programmable logic controller interlocks, high vacuum, flow and pressure control functional testing. The purpose of Acceptance testing documented by this report was to demonstrate compliance of the exhausters with the performance criteria established within HNF-0490, Rev. 1 following a repair and upgrade effort at Hanford. In addition, data obtained during this testing is required for the resolution of outstanding Non-conformance Reports (NCR), and finally, to demonstrate the functionality of the associated software for the pressure control and high vacuummore » exhauster operating modes provided for by W-320. Additional testing not required by the ATP was also performed to assist in the disposition and close out of receiving inspection report and for application design information (system curve). Results of this testing are also captured within this document.« less

The Huygens probe is prepared for transport from the Skid Strip, CCAS

NASA Technical Reports Server (NTRS)

1997-01-01

The Huygens probe, which will study the clouds, atmosphere and surface of Saturn's largest moon, Titan, as part of the Cassini mission to Saturn, is prepared for transport from the Skid Strip, Cape Canaveral Air Station (CCAS), after being off-loaded from a plane. The probe was designed and developed for the European Space Agency (ESA) by a European industrial consortium led by Aerospatiale as prime contractor. Over the past year, it was integrated and tested at the facilities of Daimler Benz Aerospace Dornier Satellitensysteme in Germany. The probe will be mated to the Cassini orbiter, which was designed and assembled at NASA's Jet Propulsion Laboratory in California. The Cassini launch is targeted for October 6 from CCAS aboard a Titan IVB/Centaur expendable launch vehicle. After arrival at Saturn in 2004, the probe will be released from the Cassini orbiter to slowly descend through the Titan atmosphere to the moon's surface.

Astronauts greet the U.S. Women's World Cup Soccer Team at the Skid Strip

NASA Technical Reports Server (NTRS)

1999-01-01

Members of the U.S. Women's World Cup Soccer Team were greeted upon their arrival at the Skid Strip at Cape Canaveral Air Station by Astronauts (right) Steven W. Lindsey, Heidemarie M. Stefanyshyn-Piper and Scott E. Parzynski. The team are here to view the launch of Space Shuttle mission STS-93, scheduled for 12:36 a.m. EDT July 20. Much attention has been generated over the launch due to Commander Eileen M. Collins, the first woman to serve as commander of a Shuttle mission. The primary payload of the five-day mission is the Chandra X-ray Observatory, which will allow scientists from around the world to study some of the most distant, powerful and dynamic objects in the universe. The new telescope is 20 to 50 times more sensitive than any previous X- ray telescope and is expected to unlock the secrets of supernovae, quasars and black holes.

View of Cosmic Ray Experiment near the Apollo 15 Lunar Module

NASA Image and Video Library

1972-04-21

AS16-107-17442 (22 April 1972) --- A close-up view of the Apollo 16 Cosmic Ray Detector (CRD) experiment deployed at the +Y strut of the Lunar Module (LM). The crewmembers moved it to this position from near the deployment site of the Apollo Lunar Surface Experiments Package (ALSEP) because, in the words of astronaut John W. Young, commander, "The panels were getting a little warm." Note that the LM did not skid upon landing, as evidenced by the landing contact probe's folded back (neatly) position and the lack of skid marks. While astronauts Young, and Charles M. Duke Jr., lunar module pilot; descended in the Apollo 16 Lunar Module (LM) "Orion" to explore the Descartes highlands landing site on the moon, astronaut Thomas K. Mattingly II, command module pilot, remained with the Command and Service Modules (CSM) "Casper" in lunar orbit.

Mapping the optimal forest road network based on the multicriteria evaluation technique: the case study of Mediterranean Island of Thassos in Greece.

PubMed

Tampekis, Stergios; Sakellariou, Stavros; Samara, Fani; Sfougaris, Athanassios; Jaeger, Dirk; Christopoulou, Olga

2015-11-01

The sustainable management of forest resources can only be achieved through a well-organized road network designed with the optimal spatial planning and the minimum environmental impacts. This paper describes the spatial layout mapping for the optimal forest road network and the environmental impacts evaluation that are caused to the natural environment based on the multicriteria evaluation (MCE) technique at the Mediterranean island of Thassos in Greece. Data analysis and its presentation are achieved through a spatial decision support system using the MCE method with the contribution of geographic information systems (GIS). With the use of the MCE technique, we evaluated the human impact intensity to the forest ecosystem as well as the ecosystem's absorption from the impacts that are caused from the forest roads' construction. For the human impact intensity evaluation, the criteria that were used are as follows: the forest's protection percentage, the forest road density, the applied skidding means (with either the use of tractors or the cable logging systems in timber skidding), the timber skidding direction, the visitors' number and truck load, the distance between forest roads and streams, the distance between forest roads and the forest boundaries, and the probability that the forest roads are located on sights with unstable soils. In addition, for the ecosystem's absorption evaluation, we used forestry, topographical, and social criteria. The recommended MCE technique which is described in this study provides a powerful, useful, and easy-to-use implement in order to combine the sustainable utilization of natural resources and the environmental protection in Mediterranean ecosystems.

Evaluation of remedial treatments at skid accident locations.

DOT National Transportation Integrated Search

1974-01-01

The Virginia Department of Highways has for many years been concerned with the slipperiness of highway pavements, and has undertaken remedial action at numerous high wet accident locations. The purpose of this study was to evaluate the remedial actio...

Harmonization of texture and skid-resistance measurements.

DOT National Transportation Integrated Search

2008-09-30

Due to safety concerns associated with friction testing on both high and low-speed facilities, testing at variable speeds has been previously investigated by the Florida DOT. The American Society for Testing and materials (ASTM) has endorsed this con...

Laboratory evaluation of friction loss and compactability of asphalt mixtures.

DOT National Transportation Integrated Search

2012-04-01

This study aimed to develop prediction models for friction loss and laboratory compaction of asphalt : mixtures. In addition, the study evaluated the effect of compaction level and compaction method of skid : resistance and the internal structure of ...

Quantitative relationship between crash risks and pavement skid resistance.

DOT National Transportation Integrated Search

2014-05-01

Faced with continuously increasing maintenance due to aging infrastructure, the Texas Department of : Transportation (TxDOT) is evaluating the potential impact of reduced funding on highway safety. The main : objective of this report is to develop a ...

Skid-mounted support system for temporary guide signs.

DOT National Transportation Integrated Search

2014-11-01

A common issue during phased highway construction projects is the need to temporarily relocate : large guide signs on the roadside or install new guide signs for temporary use. The conventional concrete : foundations used for these signs are costly a...

99. LIQUID OXYGEN LINE AND SAMPLING VALVE FOR RAPIDLOAD ON ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

99. LIQUID OXYGEN LINE AND SAMPLING VALVE FOR RAPID-LOAD ON WEST SIDE OF SKID 9A - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Guide to the texturing of concrete bridge decks.

DOT National Transportation Integrated Search

1984-01-01

The findings from this study were based on limited data. Requests for candidate structures for the inspections indicated that relatively few suitable bridges were available. Only 6 of those bridges could be skid tested. A further limitation was that,...

Crash Lethality Model

DTIC Science & Technology

2012-06-06

Statistical Data ........................................................................................... 45 31 Parametric Model for Rotor Wing Debris...Area .............................................................. 46 32 Skid Distance Statistical Data...results. The curve that related the BC value to the probability of skull fracture resulted in a tight confidence interval and a two tailed statistical p

Development of surface friction guidelines for LADOTD : research project capsule.

DOT National Transportation Integrated Search

2011-02-01

The current friction guideline of the Louisiana Department of : Transportation and Development (LADOTD) for a wearing course mixture : design deals with the polished stone value (PSV) of coarse aggregate : (which is a relative British Pendulum skid-r...

Effect of tree thinning and skidding trails on hydrological connectivity in two Japanese forest catchments

NASA Astrophysics Data System (ADS)

López-Vicente, Manuel; Sun, Xinchao; Onda, Yuichi; Kato, Hiroaki; Gomi, Takashi; Hiraoka, Marino

2017-09-01

Land use composition and patterns influence the hydrological response in mountainous and forest catchments. In plantation forest, management operations (FMO) modify the spatial and temporal dynamics of overland flow processes. However, we found a gap in the literature focussed on modelling hydrological connectivity (HC) in plantation forest under different FMO. In this study, we simulated HC in two steep paired forest subcatchments (K2 and K3, 33.2 ha), composed of Japanese cypress (Chamaecyparis obtusa Endl.) and Japanese cedar (Cryptomeria japonica D. Don) plantations (59% of the total area) against a tree thinning intensity of 50% at different time. Additionally, construction of new skidding trails and vegetation recovery was simulated on five thinning-based scenarios that covered a 40-month test period (July 2010 - October 2013). As a future scenario, six check-dams located in the main streams were proposed to reduce sediment and radionuclide delivery. An updated version of Borselli's index of runoff and sediment connectivity was run, using the D-infinity flow accumulation algorithm and exploiting three 0.5-m resolution digital elevation models. On the basis of the pre-FMO scenario, HC increased at catchment scale owing to tree thinning and the new skidding trails. This change was more noticeable within the area affected by the FMO, where HC increased by 11.4% and 10.5% in the cypress and cedar plantations in K2 respectively and by 8.8% in the cedar plantation in K3. At hillslope plot and stream scales, the evolution in the values of HC was less evident, except the increment (by 5.4%) observed in the streams at K2 after the FMO. Progressive vegetation recovery after the FMO triggered a slight reduction of connectivity in all compartments of both subcatchments. Forest roads and especially skidding trails presented the highest values of HC, appearing as the most efficient features connecting the different vegetation patches with the stream network. The spatial and temporal evolution of HC over the five past scenarios correlated well with the observed changes in runoff yield, as well as with the available values of rainfall interception and throughfall before, during, and after the FMO. The simulation of the proposed scenario recommends the construction of check-dams as effective landscape features to somewhat reduce HC and thus to decrease the sediment and radionuclide delivery rates from the two subcatchments.

JPSS-1 Spacecraft Canning and Lift to Transport Trailer

NASA Image and Video Library

2017-10-23

In the Astrotech Processing Facility at Vandenberg Air Force Base in California, the Joint Polar Satellite System-1, or JPSS-1, spacecraft is wrapped in a protective covering prior to technicians and engineers placing it in a protective container. It then will be mounted on a transport trailer for its move to Space Launch Complex 2. At the pad, JPSS-1 will be lifted for mating atop a United Launch Alliance Delta II rocket. Built by Ball Aerospace and Technologies Corp. of Boulder, Colorado, JPSS is the first in a series four next-generation environmental satellites in a collaborative program between the NOAA and NASA. Liftoff is scheduled to take place from Vandenberg's Space Launch Complex 2.

Vermilion Harbor, Ohio. Detailed Project Report on Section 111, Shore Erosion Study. Stage 3 Documentation

DTIC Science & Technology

1982-09-01

Cemmotatioa of Q(C’%4JA S ACH \\)ALU- A,,jJ t b AM A&A (OASA;eIq? ,rTr LaMinated by 3"" &(~n j heked by ’i ’C _____ Date.14-CC 7- ~ I f FE e- - Am S.. I...1979 by flatbed trailer. The District rented the boat lift at the Vermilion Power Boat, Inc. marina to lift and place the dredge in the water (see... Flatbed Trailer A-3 7 Lowering Mud Cat into Water at Marina A-4 8 Dozer at Secondary Borrow Area, Lagoons Beach A-4 9 Six-Inch Diameter Pipe Stockpiled

An Experimental Study of the Ground Transportation System (GTS) Model in the NASA Ames 7- by 10-Ft Wind Tunnel

NASA Technical Reports Server (NTRS)

Storms, Bruce L.; Ross, James C.; Heineck, James T.; Walker, Stephen M.; Driver, David M.; Zilliac, Gregory G.; Bencze, Daniel P. (Technical Monitor)

2001-01-01

The 1/8-scale Ground Transportation System (GTS) model was studied experimentally in the NASA Ames 7- by 10-Ft Wind Tunnel. Designed for validation of computational fluid dynamics (CFD), the GTS model has a simplified geometry with a cab-over-engine design and no tractor-trailer gap. As a further simplification, all measurements of the GTS model were made without wheels. Aerodynamic boattail plates were also tested on the rear of the trailer to provide a simple geometry modification for computation. The experimental measurements include body-axis drag, surface pressures, surface hot-film anemometry, oil-film interferometry, and 3-D particle image velocimetry (PIV). The wind-averaged drag coefficient with and without boattail plates was 0.225 and 0.277, respectively. PIV measurements behind the model reveal a significant reduction in the wake size due to the flow turning provided by the boattail plates. Hot-film measurements on the side of the cab indicate laminar separation with turbulent reattachment within 0.08 trailer width for zero and +/- 10 degrees yaw. Oil film interferometry provided quantitative measurements of skin friction and qualitative oil flow images. A complete set of the experimental data and the surface definition of the model are included on a CD-ROM for further analysis and comparison.

Surface friction measurements of fine-graded asphalt mixtures : final report, June 2008.

DOT National Transportation Integrated Search

2008-06-01

Skid resistance is generated by the development of friction between the vehicle tire and : roadway surface, and is partially dependent upon the characteristics of the pavement : texture. Microtexture and macrotexture are the critical components of pa...

79. VIEW FROM SOUTH OF NITROGEN AND HELIUM STORAGE TANKS ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

79. VIEW FROM SOUTH OF NITROGEN AND HELIUM STORAGE TANKS AND CONTROL SKIDS ON SLC-3W FUEL APRON - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

Installation and performance of lightweight aggregate asphaltic concrete test sections.

DOT National Transportation Integrated Search

1970-01-01

In 1966 and 1968 test sections of asphaltic concrete overlays fabricated with coarse lightweight aggregate and fine limestone were installed in the Roanoke-Bedford area. The experimental mixes used were designed in an attempt to develop skid resistan...

Research notes : thin polymer overlays on bridge decks.

DOT National Transportation Integrated Search

2007-11-01

Winters in Oregon are hard on our bridges. Vehicles with studded tires gouge the pavement and abrade the deck surface. This abrasion often leads to reduced skid resistance. As the bridge deck ages, cracks often develop. Deicing chemicals used in wint...

Evaluation of design and construction issues of thin HMA overlays.

DOT National Transportation Integrated Search

2015-04-01

While the overall implementation of thin HMA overlays in Texas has been successful, some issues need to be addressed: : appropriate blending of SAC A and SAC B aggregate to ensure adequate skid resistance; best practices to achieve adequate bonding :...

Long term validation of an accelerated polishing test procedure for HMA pavements.

DOT National Transportation Integrated Search

2013-04-01

The Ohio Department of Transportation (ODOT) has set strategic goals to improve driving safety by maintaining : smooth pavement surfaces with high skid resistance. ODOT has taken the initiative to monitor pavement : friction on Ohio roadways and reme...

33. View aft of main deck, port side, taken from ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

33. View aft of main deck, port side, taken from just aft of forecastle bulkhead showing foremast, fore shrouds, pig house, midship house and boat skids. - Ship BALCLUTHA, 2905 Hyde Street Pier, San Francisco, San Francisco County, CA

Development of a Short-Duration Drive Cycle to Represent Long-Term Measured Drive Cycle Data: Evaluation of Truck Efficiency Technologies in Class 8 Tractor Trailers

DOE Office of Scientific and Technical Information (OSTI.GOV)

LaClair, Tim; Gao, Zhiming; Fu, Joshua

Quantifying the fuel savings and emissions reductions that can be achieved from truck fuel efficiency technologies for a fleet's specific usage allows the fleet to select a combination of technologies that will yield the greatest operational efficiency and profitability. An accurate characterization of usage for the fleet is critical for such an evaluation; however, short-term measured drive cycle data do not generally reflect overall usage very effectively. This study presents a detailed analysis of vehicle usage in a commercial vehicle fleet and demonstrates the development of a short-duration synthetic drive cycle with measured drive cycle data collected over an extendedmore » period of time. The approach matched statistical measures of the vehicle speed with acceleration history and integrated measured grade data to develop a compressed drive cycle that accurately represents total usage. Drive cycle measurements obtained during a full year from six tractor trailers in normal operations in a less-than-truckload carrier were analyzed to develop a synthetic drive cycle. The vehicle mass was also estimated to account for the variation of loads that the fleet experienced. These drive cycle and mass data were analyzed with a tractive energy analysis to quantify the benefits in terms of fuel efficiency and reduced carbon dioxide emissions that can be achieved on Class 8 tractor trailers by using advanced efficiency technologies, either individually or in combination. Although differences exist between Class 8 tractor trailer fleets, this study provides valuable insight into the energy and emissions reduction potential that various technologies can bring in this important trucking application. Finally, the methodology employed for generating the synthetic drive cycle serves as a rigorous approach to develop an accurate usage characterization that can be used to effectively compress large quantities of drive cycle data.« less

Evaluation of US rear underride guard regulation for large trucks using real-world crashes.

PubMed

Brumbelow, Matthew L; Blanar, Laura

2010-11-01

Current requirements for rear underride guards on large trucks are set by the National Highway Traffic Safety Administration in Federal Motor Vehicle Safety Standards (FMVSS) 223 and 224. The standards have been in place since 1998, but their adequacy has not been evaluated apart from two series of controlled crash tests. The current study used detailed reviews of real-world crashes from the Large Truck Crash Causation Study to assess the ability of guards that comply with certain aspects of the regulation to mitigate passenger vehicle underride. It also evaluated the dangers posed by underride of large trucks that are exempt from guard requirements. For the 115 cases meeting the inclusion criteria, coded data, case narratives, photographs, and measurements were used to examine the interaction between study vehicles. The presence and type of underride guard was determined, and its performance in mitigating underride was categorized. Overall, almost one-half of the passenger vehicles had underride damage classified as severe or catastrophic. These vehicles accounted for 23 of the 28 in which occupants were killed. For the cases involving trailers with underride guards compliant with one or both FMVSS, guard deformation or complete failure was frequent and most commonly due to weak attachments, buckling of the trailer chassis, or bending of the lateral end of the guard under narrow overlap loading. Most of the truck units studied qualified for at least one of the FMVSS exemptions. The two largest groups were trailers with small wheel setbacks and single-unit straight trucks. Dump trucks represented a particularly hazardous category of straight truck. The current study suggests several weaknesses in the rear underride guard regulation. The standard allows too much ground clearance, the quasi-static test conditions allow guard designs that fail in narrow overlap crashes, and certifying guards independent of trailers leads to systems with inadequate attachment and chassis strength. Additionally, the regulation should be expanded to cover a higher percentage of the large truck fleet.

Development of a Short-Duration Drive Cycle to Represent Long-Term Measured Drive Cycle Data: Evaluation of Truck Efficiency Technologies in Class 8 Tractor Trailers

DOE PAGES

LaClair, Tim; Gao, Zhiming; Fu, Joshua; ...

2014-12-01

Quantifying the fuel savings and emissions reductions that can be achieved from truck fuel efficiency technologies for a fleet's specific usage allows the fleet to select a combination of technologies that will yield the greatest operational efficiency and profitability. An accurate characterization of usage for the fleet is critical for such an evaluation; however, short-term measured drive cycle data do not generally reflect overall usage very effectively. This study presents a detailed analysis of vehicle usage in a commercial vehicle fleet and demonstrates the development of a short-duration synthetic drive cycle with measured drive cycle data collected over an extendedmore » period of time. The approach matched statistical measures of the vehicle speed with acceleration history and integrated measured grade data to develop a compressed drive cycle that accurately represents total usage. Drive cycle measurements obtained during a full year from six tractor trailers in normal operations in a less-than-truckload carrier were analyzed to develop a synthetic drive cycle. The vehicle mass was also estimated to account for the variation of loads that the fleet experienced. These drive cycle and mass data were analyzed with a tractive energy analysis to quantify the benefits in terms of fuel efficiency and reduced carbon dioxide emissions that can be achieved on Class 8 tractor trailers by using advanced efficiency technologies, either individually or in combination. Although differences exist between Class 8 tractor trailer fleets, this study provides valuable insight into the energy and emissions reduction potential that various technologies can bring in this important trucking application. Finally, the methodology employed for generating the synthetic drive cycle serves as a rigorous approach to develop an accurate usage characterization that can be used to effectively compress large quantities of drive cycle data.« less

Ready-to-eat street-vended food as a potential vehicle of bacterial pathogens and antimicrobial resistance: An exploratory study in Porto region, Portugal.

PubMed

Campos, Joana; Gil, Joana; Mourão, Joana; Peixe, Luísa; Antunes, Patrícia

2015-08-03

The ready-to-eat street vending commerce, as street mobile food vendors, has grown exponentially worldwide, representing in some countries a significant proportion of food consumed by the urban population. However, the microbiological food safety hazards of mobile vending units in industrialized countries are scarcely evaluated. To assess the microbiological quality and safety of this type of food and try to achieve the connection of its contamination with hygienic conditions of food-handlers, we analyzed hotdogs (n = 10), hamburgers (n = 10) and hands (n = 9) from ten street-vending trailers in the Porto region. Food and food-handler samples were tested for Enterobacteriaceae and coliform counts, Escherichia coli and coagulase-positive staphylococci counts/detection and presence of Salmonella. Aerobic mesophilic counts and detection of Listeria monocytogenes (Pulsed Field Gel Electrophoresis-PFGE and serotyping) were also tested in food samples. E. coli isolates were confirmed by MALDI-TOF and characterized for clonality (phylogenetic groups-PhG, PFGE and Multilocus Sequence Typing), antibiotic resistance (disk diffusion, PCR/sequencing) and intestinal pathogenic virulence factors (PCR/sequencing). All food samples presented poor microbiological quality (100% Enterobacteriaceae and coliforms; 20% E. coli (4 hamburgers, 4 trailers) and 20% (2 hamburgers/2 hotdogs, 3 trailers) were positive for L. monocytogenes (2 PFGE-types belonging to serotype 1/2a and 4b). Salmonella and coagulase-positive staphylococci were not detected. Food-handlers carried Enterobacteriaceae and coliforms (100%), E. coli (11%) and/or coagulase-positive staphylococci (44%). E. coli was detected in 12 samples (n = 30-food/food-handlers; phylogenetic groups A0/A1/B1) with 33% resistant to one or more antibiotics. Two multidrug resistant atypical E. coli pathotype strains (astA-ST165(CC165)/food-handler, eaeA-ST327/food) were detected. Three out of eight E. coli clonal lineages [ST409/ST976(CC10)/ST297] and the two L. monocytogenes clones were spread in different samples/trailers, suggesting cross-contamination or a common source of contamination. This exploratory study, in Porto region, showed ready-to-eat street foods from vending trailers as potential vehicles of clinically relevant L. monocytogenes serotypes and/or E. coli carrying clinically relevant virulence/antibiotic resistance features, and food-handlers as a critical risk factor in this expanding food sector. Copyright © 2015 Elsevier B.V. All rights reserved.

Effects of season, truck type, and location within truck on gastrointestinal tract temperature of market-weight pigs during transport.

PubMed

Conte, S; Faucitano, L; Bergeron, R; Torrey, S; Gonyou, H W; Crowe, T; Tamminga, E Toth; Widowski, T M

2015-12-01

Two experiments were done to assess the effects of season, truck type, and location in the truck on the gastrointestinal tract temperature (GTT) of market-weight pigs during transport. In Exp. 1, a total of 504 sentinel pigs were selected from a total load of 3,756 pigs over 12 wk in summer or winter and transported in either a double-decked (DD) hydraulic truck or a pot-belly (PB) trailer for 2 h. In Exp. 2, a total of 330 sentinel pigs were selected from a total load of 2,145 pigs over 11 wk in summer or winter and transported in a PB trailer for 8 h. In both experiments, sentinel pigs were equipped with a temperature data logger for the real-time GTT recording from the farm to slaughter. Transport was divided into 8 periods in Exp. 1 (rest, pretravel, initial travel, prearrival 1, prearrival 2, unloading, lairage 1, and lairage 2) and in Exp. 2 (rest, pretravel 1, pretravel 2, travel, prearrival 1, prearrival 2, lairage 1, and lairage 2). A delta GTT (ΔGTT) was calculated as the difference between the measured GTT at any determined event and the GTT measured at rest. In Exp. 1, the ΔGTT of pigs was greater ( < 0.001) in summer than in winter and only during the pretravel and initial travel periods. No difference was observed in the ΔGTT between the 2 truck types ( > 0.10). In summer, pigs located in the front top and rear top compartments of the PB trailer presented greater ( < 0.05) ΔGTT values than those transported in the middle top and front belly compartments during initial travel. In summer, during prearrival 1 and 2, a greater ( < 0.05) loss of GTT was found in pigs located in the rear top compartment of the DD truck compared with the rear lower compartment and in the front middle compartment compared with the rear middle compartment of the PB trailer. In Exp. 2, the ΔGTT of pigs was greater ( = 0.03) in summer than in winter during pretravel 2. Pigs in the front top compartment had a greater ( < 0.05) ΔGTT compared with pigs in the middle top, lower deck, and front belly compartments during the pretravel periods. Based on the results of the 2 experiments, modifications of the PB trailer model are recommended to limit body temperature increase due to physical stress at loading and unloading, and during transport due to inconsistent ventilation rate across vehicle locations.

46 CFR 160.042-3 - Construction.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 6 2014-10-01 2014-10-01 false Construction. 160.042-3 Section 160.042-3 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) EQUIPMENT, CONSTRUCTION, AND MATERIALS: SPECIFICATIONS AND APPROVAL LIFESAVING EQUIPMENT Skids, Liferaft, for Merchant Vessels § 160.042-3 Construction...

46 CFR 160.042-3 - Construction.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 6 2011-10-01 2011-10-01 false Construction. 160.042-3 Section 160.042-3 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) EQUIPMENT, CONSTRUCTION, AND MATERIALS: SPECIFICATIONS AND APPROVAL LIFESAVING EQUIPMENT Skids, Liferaft, for Merchant Vessels § 160.042-3 Construction...

46 CFR 160.042-3 - Construction.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 6 2012-10-01 2012-10-01 false Construction. 160.042-3 Section 160.042-3 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) EQUIPMENT, CONSTRUCTION, AND MATERIALS: SPECIFICATIONS AND APPROVAL LIFESAVING EQUIPMENT Skids, Liferaft, for Merchant Vessels § 160.042-3 Construction...

46 CFR 160.042-3 - Construction.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 6 2013-10-01 2013-10-01 false Construction. 160.042-3 Section 160.042-3 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) EQUIPMENT, CONSTRUCTION, AND MATERIALS: SPECIFICATIONS AND APPROVAL LIFESAVING EQUIPMENT Skids, Liferaft, for Merchant Vessels § 160.042-3 Construction...

Validation of TxDOT flexible pavement skid prediction model : project summary.

DOT National Transportation Integrated Search

2017-01-01

This study had two main objectives: : Investigate and examine surface and friction characteristics of 35 test sections of asphalt mixtures and 35 test sections of surface-treated roads in Texas. The test sections covered a wide range of mixtures ...

Evaluation of skid measurements used by TxDOT : technical report.

DOT National Transportation Integrated Search

2013-05-01

Accurate estimates of wet roadway friction are critical to the safety of the traveling public, project selection, and for managing the wet weather accident reduction program. Currently, Texas is the only state that uses a one-channel, torque-type whe...

Evaluation of the on-flex expansion joint sealing system for bridge decks.

DOT National Transportation Integrated Search

1984-01-01

The findings from this study were based on limited data. Requests for candidate structures for the inspections indicated that relatively few suitable bridges were available. Only 6 of those bridges could be skid tested. A further limitation was that,...

Harvesting Productionin Uneven-Aged Loblolly-Shortleaf Pine Stands:The Crossett Farm Forestry Forties

Treesearch

R. Kluender; B. Stokes; S. Woodfin

1992-01-01

Twostands managed using uneven-aged techniques werehar- vested aspar-t of a5-year entry schedule. Felling and skidding productivity varied significantly with average stem diameter and volume and was affected by diameter distribution of the removed material.

70. DETAIL OF OXYGEN TRANSFER PRESSURE GAUGE IN UPPER LEFT ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

70. DETAIL OF OXYGEN TRANSFER PRESSURE GAUGE IN UPPER LEFT CORNER OF SKID ON RIGHT IN CA-133-1-C-69 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

36 CFR 71.3 - Designation.

Code of Federal Regulations, 2012 CFR

2012-07-01

...: Tent or trailer spaces, drinking water, access road, refuse containers, toilet facilities, personal fee..., roads, overlook sites, visitors' centers, scenic drives, toilet facilities, picnic tables, and boat...

36 CFR 71.3 - Designation.

Code of Federal Regulations, 2013 CFR

2013-07-01

...: Tent or trailer spaces, drinking water, access road, refuse containers, toilet facilities, personal fee..., roads, overlook sites, visitors' centers, scenic drives, toilet facilities, picnic tables, and boat...

36 CFR 71.3 - Designation.

Code of Federal Regulations, 2014 CFR

2014-07-01

...: Tent or trailer spaces, drinking water, access road, refuse containers, toilet facilities, personal fee..., roads, overlook sites, visitors' centers, scenic drives, toilet facilities, picnic tables, and boat...

Investigations into regional ozone concentrations in the Bakken-Williston Basin using ARTEMIS, a mobile measurment platform.

NASA Astrophysics Data System (ADS)

Donohoue, D.; Jumes, D.; Jaglowski, J.

2017-12-01

During a campaign launched in August 2015, concentrations of ozone, nitrogen oxides, and weather conditions were measured throughout the Bakken-Williston Basin. The data was collected using a new in-situ monitoring system ARTEMIS (Atmospheric Research Trailer for Environmental Monitoring and Interactive Science). ARTEMIS is a self-sustaining trailer equipped with a solar panel and four 80 Ah batteries, which can power an instrumental suite. It provided a temporary sampling station which could be erected in five minutes. During this campaign we collected data for one hour at sites throughout North Dakota and Montana. Preliminary results from this data suggests that near active mining or methane flaring regions ozone concentrations appear to be elevated from the background.

Automated Detection of Selective Logging in Amazon Forests Using Airborne Lidar Data and Pattern Recognition Algorithms

NASA Astrophysics Data System (ADS)

Keller, M. M.; d'Oliveira, M. N.; Takemura, C. M.; Vitoria, D.; Araujo, L. S.; Morton, D. C.

2012-12-01

Selective logging, the removal of several valuable timber trees per hectare, is an important land use in the Brazilian Amazon and may degrade forests through long term changes in structure, loss of forest carbon and species diversity. Similar to deforestation, the annual area affected by selected logging has declined significantly in the past decade. Nonetheless, this land use affects several thousand km2 per year in Brazil. We studied a 1000 ha area of the Antimary State Forest (FEA) in the State of Acre, Brazil (9.304 ○S, 68.281 ○W) that has a basal area of 22.5 m2 ha-1 and an above-ground biomass of 231 Mg ha-1. Logging intensity was low, approximately 10 to 15 m3 ha-1. We collected small-footprint airborne lidar data using an Optech ALTM 3100EA over the study area once each in 2010 and 2011. The study area contained both recent and older logging that used both conventional and technologically advanced logging techniques. Lidar return density averaged over 20 m-2 for both collection periods with estimated horizontal and vertical precision of 0.30 and 0.15 m. A relative density model comparing returns from 0 to 1 m elevation to returns in 1-5 m elevation range revealed the pattern of roads and skid trails. These patterns were confirmed by ground-based GPS survey. A GIS model of the road and skid network was built using lidar and ground data. We tested and compared two pattern recognition approaches used to automate logging detection. Both segmentation using commercial eCognition segmentation and a Frangi filter algorithm identified the road and skid trail network compared to the GIS model. We report on the effectiveness of these two techniques.

29 CFR 1917.115 - Platforms and skids.

Code of Federal Regulations, 2010 CFR

2010-07-01

... safe condition. Safe working loads, which shall be posted or marked on or adjacent to platforms and... Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR... nets, to protect employees against falls. (b) Any employee working below a second-story platform or...

Field evaluation of asphalt mixture skid resistance and its relationship to aggregate characteristics.

DOT National Transportation Integrated Search

2010-12-01

This report documents the findings from the research that was carried out as part of Phase II of Texas : Department of Transportation (TxDOT) Project 0-5627. The research included measuring and analyzing the : mechanical and physical properties of ag...

Evaluation of thin epoxy system overlays for concrete bridge decks : interim report No. 1.

DOT National Transportation Integrated Search

1986-05-01

Four epoxy overlay systems were applied to concrete bridge decks in north Louisiana to evaluate their performance as skid resistant surfaces primarily and also as concrete sealers. Dural Flexolith, Poly-Carb Flexogrid, and Con/Chem Cono/Crete were pl...

46 CFR 160.042-3 - Construction.

Code of Federal Regulations, 2010 CFR

2010-10-01

.... (a) The trackways of the skids shall be constructed of 6″×31/2″×1/2″ structural angles, or of... project over the side of the vessel. (b) The lower end of the life raft shall be supported by a base plate...

Performance of soil-aggregate-fabric systems in frost-susceptible roads, Linn County, Iowa.

DOT National Transportation Integrated Search

1980-05-01

Thousands of miles of unimproved secondary roads in the upper midwest are annually plagued by frost action in their subgrades. Among the economic losses incurred are costs of repair and maintenance of the damaged roadway. Considerable loss of skid re...

Social networks, time homeless, and social support: A study of men on Skid Row.

PubMed

Green, Harold D; Tucker, Joan S; Golinelli, Daniela; Wenzel, Suzanne L

2013-12-18

Homeless men are frequently unsheltered and isolated, disconnected from supportive organizations and individuals. However, little research has investigated these men's social networks. We investigate the structure and composition of homeless men's social networks, vis-a-vis short- and long-term homelessness with a sample of men drawn randomly from meal lines on Skid Row in Los Angeles. Men continuously homeless for the past six months display networks composed of riskier members when compared to men intermittently homeless during that time. Men who report chronic, long-term homelessness display greater social network fragmentation when compared to non-chronically homeless men. While intermittent homelessness affects network composition in ways that may be addressable with existing interventions, chronic homelessness fragments networks, which may be more difficult to address with those interventions. These findings have implications for access to social support from network members which, in turn, impacts the resources homeless men require from other sources such as the government or NGOs.

Skid steer fuel cell powered unmanned ground vehicle (Burro)

NASA Astrophysics Data System (ADS)

Meldrum, Jay S.; Green, Christopher A.

2008-04-01

The use of alternative energy technology for vehicle propulsion and auxiliary power is becoming more important. Work is being performed at Michigan Technological University's Keweenaw Research Center on an Army Research Laboratory cooperative agreement to develop two unmanned ground vehicles for military applications. A wide range of alternative energy technologies were investigated. Hydrogen-powered proton exchange membrane fuel cells were identified as the most appropriate alternative energy source. This is due to some development and commercialization which makes the technology "drop-in plug-in" for immediate use. We have previously presented research work on a small unmanned ground vehicle demonstration platform where the fuel cell is the only power source. We now present research work on the integration of a fuel cell onto a larger skid steer platform. The dual-power capability of this vehicle can provide a modest level of propulsion in "engine-off mode" and may also be used to power directed energy devices which have applications in countermine and similar threat technologies.

Social networks, time homeless, and social support: A study of men on Skid Row

PubMed Central

Green, Harold D.; Tucker, Joan S.; Golinelli, Daniela; Wenzel, Suzanne L.

2014-01-01

Homeless men are frequently unsheltered and isolated, disconnected from supportive organizations and individuals. However, little research has investigated these men’s social networks. We investigate the structure and composition of homeless men’s social networks, vis-a-vis short- and long-term homelessness with a sample of men drawn randomly from meal lines on Skid Row in Los Angeles. Men continuously homeless for the past six months display networks composed of riskier members when compared to men intermittently homeless during that time. Men who report chronic, long-term homelessness display greater social network fragmentation when compared to non-chronically homeless men. While intermittent homelessness affects network composition in ways that may be addressable with existing interventions, chronic homelessness fragments networks, which may be more difficult to address with those interventions. These findings have implications for access to social support from network members which, in turn, impacts the resources homeless men require from other sources such as the government or NGOs. PMID:24466427

Astronauts Stefanyshyn-Piper, Lindsey and Currie greet First Lady Hillary Clinton at the Skid Strip

NASA Technical Reports Server (NTRS)

1999-01-01

First Lady Hillary Rodham Clinton is greeted by Astronauts (from left) Heidemarie M. Stefanyshyn-Piper, Steven W. Lindsey, and Nancy Jane Currie upon Mrs. Clinton's arrival at the Skid Strip at Cape Canaveral Air Station. She and her daughter, Chelsea (far right) are here to view the launch of Space Shuttle mission STS- 93, scheduled for 12:36 a.m. EDT July 20. Much attention has been generated over the launch due to Commander Eileen M. Collins, the first woman to serve as commander of a Shuttle mission. The primary payload of the five-day mission is the Chandra X-ray Observatory, which will allow scientists from around the world to study some of the most distant, powerful and dynamic objects in the universe. The new telescope is 20 to 50 times more sensitive than any previous X-ray telescope and is expected to unlock the secrets of supernovae, quasars and black holes.

Astronauts Stefanyshyn-Piper, Lindsey and Currie greet First Lady Hillary Clinton at the Skid Strip

NASA Technical Reports Server (NTRS)

1999-01-01

First Lady Hillary Rodham Clinton is greeted by Astronaut Nancy Jane Currie upon Mrs. Clinton's arrival at the Skid Strip at Cape Canaveral Air Station. Waiting at left are Astronauts Heidemarie M. Stefanyshyn-Piper and Steven W. Lindsey. Mrs. Clinton and her daughter, Chelsea (far right) are here to view the launch of Space Shuttle mission STS-93, scheduled for 12:36 a.m. EDT July 20. Much attention has been generated over the launch due to Commander Eileen M. Collins, the first woman to serve as commander of a Shuttle mission. The primary payload of the five- day mission is the Chandra X-ray Observatory, which will allow scientists from around the world to study some of the most distant, powerful and dynamic objects in the universe. The new telescope is 20 to 50 times more sensitive than any previous X- ray telescope and is expected to unlock the secrets of supernovae, quasars and black holes.

7 CFR 2812.5 - Restrictions.

Code of Federal Regulations, 2010 CFR

2010-01-01

... group Name 19 Ships, Small Craft, Pontoons, and Floating Docks. 23 Vehicles, Trailers and Cycles. 24..., Detection, and Coherent Radiation Equipment. 59 Electrical and Electronic Equipment Components. 65 Medical...

Enhanced fuel efficiency on tractor-trailers using synthetic jet-based active flow control

NASA Astrophysics Data System (ADS)

Amitay, Michael; Menicovich, David; Gallardo, Daniele

2016-04-01

The application of piezo-electrically-driven synthetic-jet-based active flow control to reduce drag on tractor-trailers was explored experimentally in wind tunnel testing as well as full-scale road tests. Aerodynamic drag accounts for more than 50% of the usable energy at highway speeds, a problem that applies primarily to trailer trucks. Therefore, a reduction in aerodynamic drag results in large saving of fuel and reduction in CO2 emissions. The active flow control technique that is being used relies on a modular system comprised of distributed, small, highly efficient actuators. These actuators, called synthetic jets, are jets that are synthesized at the edge of an orifice by a periodic motion of a piezoelectric diaphragm(s) mounted on one (or more) walls of a sealed cavity. The synthetic jet is zero net mass flux (ZNMF), but it allows momentum transfer to flow. It is typically driven near diaphragm and/or cavity resonance, and therefore, small electric input [O(10W)] is required. Another advantage of this actuator is that no plumbing is required. The system doesn't require changes to the body of the truck, can be easily reconfigured to various types of vehicles, and consumes small amounts of electrical power from the existing electrical system of the truck. Preliminary wind tunnel results showed up to 18% reduction in fuel consumption, whereas road tests also showed very promising results.

Relationship between estimated finishing-pig space allowance and in-transit loss in a retrospective survey of 3 packing plants in Ontario in 2003.

PubMed

Haley, Charles; Dewey, Catherine E; Widowski, Tina; Friendship, Robert

2010-07-01

The objective of this study was to determine the association between space allowance and in-transit loss of finishing pigs going to select abattoirs in Ontario during summer weather conditions. The study included data from 2- or 3-tiered trailers transporting ≥ 130 pigs in June, July, and August 2003 to 3 packers that processed 76% of Ontario market pigs. Daily in-transit loss data were merged with packer data to determine the number of pigs on each trailer. Space allowance (in square meters per pig) was estimated from the percentage of each trailer's capacity that was filled by the load size. Actual pig weights were not available. Hourly temperature and relative humidity were obtained from 2 local Ontario weather stations. In-transit loss increased with environmental temperature, by 6.6 times at temperatures between 28°C and 34.2°C compared with < 17°C. At space allowances between 0.44 and 0.43 m(2)/pig compared with ≥ 0.515 m(2)/pig, in-transit losses increased 2.12 times when environmental temperatures were < 21°C. Temperature is likely a more important determinant of in-transit loss than space allowance. However, in-transit losses in hot weather are likely to be reduced by increasing space allowance or by adding a cooling device.