Sample records for occupational heavy lifting

  1. Prosthetic Hand Lifts Heavy Loads

    NASA Technical Reports Server (NTRS)

    Carden, James R.; Norton, William; Belcher, Jewell G.; Vest, Thomas W.

    1991-01-01

    Prosthetic hand designed to enable amputee to lift diverse heavy objects like rocks and logs. Has simple serrated end effector with no moving parts. Prosthesis held on forearm by system of flexible straps. Features include ruggedness, simplicity, and relatively low cost.

  2. Heavy-lift airship dynamics

    NASA Technical Reports Server (NTRS)

    Tischler, M. B.; Ringland, R. F.; Jex, H. R.

    1983-01-01

    The basic aerodynamic and dynamic properties of an example heavy-lift airship (HLA) configuration are analyzed using a nonlinear, multibody, 6-degrees-of-freedom digital simulation. The slung-payload model is described, and a preliminary analysis of the coupled vehicle-payload dynamics is presented. Trim calculations show the importance of control mixing selection and suggest performance deficiencies in crosswind stationkeeping for the unloaded example HLA. Numerically linearized dynamics of the unloaded vehicle exhibit a divergent yaw mode and an oscillatory pitch mode whose stability characteristic is sensitive to flight speed. An analysis of the vehicle-payload dynamics shows significant coupling of the payload dynamics with those of the basic HLA. It is shown that significant improvement in the vehicle's dynamic behavior can be achieved with the incorporation of a simple flight controller having proportional, rate, and integral-error feedbacks.

  3. Heavy Lift for Exploration: Options and Utilization

    NASA Technical Reports Server (NTRS)

    Creech, Steve; Sumrall, Phil

    2010-01-01

    Every study of exploration capabilities since the Apollo Program has recommended the renewal of a heavy lift launch capability for the United States. NASA is aggressively pursuing that capability. This paper will discuss several aspects of that effort and the potential uses for that heavy lift capability. The need for heavy lift was cited most recent in the findings of the Review of U.S. Human Space Flight Plans Committee. Combined with considerations of launch availability and on-orbit operations, the Committee finds that exploration will benefit from the availability of a heavy-lift vehicle, the report said. In addition, heavy lift would enable the launching of large scientific observatories and more capable deep-space missions. It may also provide benefit in national security applications. The most recent focus of NASA s heavy lift effort is the Ares V cargo launch vehicle, which is part of the Constellation Program architecture for human exploration beyond low Earth orbit (LEO). The most recent point-of-departure configuration of the Ares V was approved during the Lunar Capabilities concept Review (LCCR) in 2008. The Ares V first stage propulsion system consists of a core stage powered by six commercial liquid hydrogen/liquid oxygen (LH2/LOX) RS-68 engines, flanked by two 5.5-segment solid rocket boosters (SRBs) based on the 5-segment Ares I first stage. The boosters use the same Polybutadiene Acrylonitrile (PBAN) propellant as the Space Shuttle. Atop the core stage is the Earth departure stage (EDS), powered by a single J-2X upper stage engine based on the Ares I upper stage engine. The 33-foot-diameter payload shroud can enclose a lunar lander, scientific instruments, or other payloads. Since LCCR, NASA has continued to refine the design through several successive internal design cycles. In addition, NASA has worked to quantify the broad national consensus for heavy lift in ways that, to the extent possible, meet the needs of the user community.

  4. NASA Heavy Lift Rotorcraft Systems Investigation

    NASA Technical Reports Server (NTRS)

    Johnson, Wayne; Yamauchi, Gloria K.; Watts, Michael E.

    2005-01-01

    The NASA Heavy Lift Rotorcraft Systems Investigation examined in depth several rotorcraft configurations for large civil transport, designed to meet the technology goals of the NASA Vehicle Systems Program. The investigation identified the Large Civil Tiltrotor as the configuration with the best potential to meet the technology goals. The design presented was economically competitive, with the potential for substantial impact on the air transportation system. The keys to achieving a competitive aircraft were low drag airframe and low disk loading rotors; structural weight reduction, for both airframe and rotors; drive system weight reduction; improved engine efficiency; low maintenance design; and manufacturing cost comparable to fixed-wing aircraft. Risk reduction plans were developed to provide the strategic direction to support a heavy-lift rotorcraft development. The following high risk areas were identified for heavy lift rotorcraft: high torque, light weight drive system; high performance, structurally efficient rotor/wing system; low noise aircraft; and super-integrated vehicle management system.

  5. NASA Heavy Lift Rotorcraft Systems Investigation

    Microsoft Academic Search

    Wayne Johnson; Gloria K. Yamauchi; Michael E. Watts

    The NASA Heavy Lift Rotorcraft Systems Investigation examined in depth several rotorcraft configurations for large civil transport, designed to meet the technology goals of the NASA Vehicle Systems Program. The investigation identified the Large Civil Tiltrotor as the configuration with the best potential to meet the technology goals. The design presented was economically competitive, with the potential for substantial impact

  6. Variable-Compliance Couplings For Heavy Lifting

    NASA Technical Reports Server (NTRS)

    Kerley, James; Eklund, Wayne; Burkhardt, Raymond; Richardson, George W.

    1992-01-01

    New coupling devices contain manual or electronically controlled, motorized drives that vary stiffnesses. Short, clamped lengths of cable provide compliance. Using threaded rods, cables stretched, relaxed, or folded to make coupling more or less stiff. In more-advanced device, brackets holding cables moved by stepping motor via gearbox and ball screw. Motor operates under computer control with position feedback. Control computer commands greater stiffness during operations requiring precise positioning, and greater compliance to accommodate manufacturing tolerances. Intended for use in wrist joints of robotic manipulators and other industrial equipment that must lift heavy objects.

  7. Current Status of NASA's Heavy Lift Plans

    NASA Technical Reports Server (NTRS)

    Creech, Steve

    2010-01-01

    Numerous studies since the Apollo Program of the 1960s have highlighted the benefits of - and the need for - a national heavy lift launch capability to support human exploration, science, national security, and commercial development of space. NASA's most recent and most refined effort to develop that heavy lift capability is the Ares V. Ares V is a key element of NASA's Constellation Program. It s overall goal s part of approved national space policy is to retire the Space Shuttle and develop its successor, complete the International Space Station, and resume human exploration beyond low Earth orbit (LEO), beginning with exploration of the Moon as a step to other destinations in the Solar System. Ares V s first role is that of cargo vehicle to carry a lunar lander into Earth orbit, rendezvous with astronauts launched on the smaller Ares I crew launch vehicle, and perform the trans lunar injection (TLI) mission to send the mated crew and lander vehicles to the Moon. The design reference missions (DRMs) envisioned for it also include direct lunar cargo flights and a human Mars mission. Although NASA's priority from the start of the Constellation Program to the present has been development of the Ares I and Orion crew vehicle to replace the retiring Shuttle fleet, the Ares team has made significant progress in understanding the performance, design trades, technology needs, mission scenarios, ground and flight operations, cost, and other factors associated with heavy lift development. The current reference configuration was selected during the Lunar Capabilities Concept Review (LCCR) in fall 2008. That design has served since then as a point of departure for further refinements and trades among five participating NASA field centers. Ares V development to date has benefited from progress on the Ares I due to commonality between the vehicles. The Ares I first stage completed a successful firing of a 5-segment solid rocket motor. The Ares I-X launch Numerous studies since the Apollo Program of the 1960s have highlighted the benefits of and the need for - a national heavy lift launch capability to support human exploration, science, national security, and commercial development of space. NASA s most recent and most refined effort to develop that heavy lift capability is the Ares V. Ares V is a key element of NASA s Constellation Program. It s overall goal s part of approved national space policy is to retire the Space Shuttle and develop its successor, complete the International Space Station, and resume human exploration beyond low Earth orbit (LEO), beginning with exploration of the Moon as a step to other destinations in the Solar System. Ares V s first role is that of cargo vehicle to carry a lunar lander into Earth orbit, rendezvous with astronauts launched on the smaller Ares I crew launch vehicle, and perform the trans lunar injection (TLI) mission to send the mated crew and lander vehicles to the Moon. The design reference missions (DRMs) envisioned for it also include direct lunar cargo flights and a human Mars mission. Although NASA s priority from the start of the Constellation Program to the present has been development of the Ares I and Orion crew vehicle to replace the retiring Shuttle fleet, the Ares team has made significant progress in understanding the performance, design trades, technology needs, mission scenarios, ground and flight operations, cost, and other factors associated with heavy lift development. The current reference configuration was selected during the Lunar Capabilities Concept Review (LCCR) in fall 2008. That design has served since then as a point of departure for further refinements and trades among five participating NASA field centers. Ares V development to date has benefited from progress on the Ares I due to commonality between the vehicles. The Ares I first stage completed a successful firing of a 5-segment solid rocket motor. The Ares I-X launch successfully demonstrated in suborbital flighhe ability to assemble, prepare, launch, control and recover the Ares I configuration and compare

  8. Space station heavy lift launch vehicle utilization

    NASA Technical Reports Server (NTRS)

    Deryder, L. J.

    1988-01-01

    The use of Heavy Lift Launch Vehicles (HLLVs) for Space Station assembly, logistics. and resupply is explored. Potential HLLVs, including those based on the Titan, and Shuttle-derived vehicles (SDV), are discussed. The baseline Critical Evaluation Task Force (CETF) Space Station assembly sequence is described and compared with assembly options made possible through the use of HLLVs. The issues of cost, dual compatibility with the Space Shuttle Space Transportation System (STS), co-manifesting of payloads with other science missions cargo return, and ground handling and launch facilities are also considered. The main advantage achieved by using HLLVs are simplification of assembly procedures, added resupply capability, and increased assured access to space. The major disadvantages are increased orbital flight operations complexity, higher logistics costs, and additional ground handling/launch facility requirements. Also, there will not be any improvement in return cargo capacity, nor any addition to crew transport capabilities. Finally, the dual STS/HLLV compatibility should be maintained to minimize program risk. HLLV and Orbital Maneuvering Vehicle design must parallel that of the Space Station.

  9. Heavy Lift & Propulsion Technology (HL&PT) - Duration: 30 minutes.

    NASA Video Gallery

    Cris Guidi delivers a presentation from the Heavy Lift & Propulsion Technology (HL&PT) study team on May 25, 2010, at the NASA Exploration Enterprise Workshop held in Galveston, TX. The purpose of ...

  10. Impact of Airfoils on Aerodynamic Optimization of Heavy Lift Rotorcraft

    Microsoft Academic Search

    C. W. Acree; Preston B. Martin; Ethan A. Romander

    Rotor airfoils were developed for two large tiltrotor designs, the Large Civil Tilt Rotor (LCTR) and the Military Heavy Tilt Rotor (MHTR). The LCTR was the most promising of several rotorcraft concepts produced by the NASA Heavy Lift Rotorcraft Systems Investigation. It was designed to carry 120 passengers for 1200 nm, with performance of 350 knots cruise at 30,000 ft

  11. Designs and Technology Requirements for Civil Heavy Lift Rotorcraft

    NASA Technical Reports Server (NTRS)

    Johnson, Wayne; Yamauchi, Gloria K.; Watts, Michael E.

    2006-01-01

    The NASA Heavy Lift Rotorcraft Systems Investigation examined in depth several rotorcraft configurations for large civil transport, designed to meet the technology goals of the NASA Vehicle Systems Program. The investigation identified the Large Civil Tiltrotor as the configuration with the best potential to meet the technology goals. The design presented was economically competitive, with the potential for substantial impact on the air transportation system. The keys to achieving a competitive aircraft were low drag airframe and low disk loading rotors; structural weight reduction, for both airframe and rotors; drive system weight reduction; improved engine efficiency; low maintenance design; and manufacturing cost comparable to fixed-wing aircraft. Risk reduction plans were developed to provide the strategic direction to support a heavy-lift rotorcraft development. The following high risk areas were identified for heavy lift rotorcraft: high torque, light weight drive system; high performance, structurally efficient rotor/wing system; low noise aircraft; and super-integrated vehicle management system.

  12. Large Scale Composite Manufacturing for Heavy Lift Launch Vehicles

    NASA Technical Reports Server (NTRS)

    Stavana, Jacob; Cohen, Leslie J.; Houseal, Keth; Pelham, Larry; Lort, Richard; Zimmerman, Thomas; Sutter, James; Western, Mike; Harper, Robert; Stuart, Michael

    2012-01-01

    Risk reduction for the large scale composite manufacturing is an important goal to produce light weight components for heavy lift launch vehicles. NASA and an industry team successfully employed a building block approach using low-cost Automated Tape Layup (ATL) of autoclave and Out-of-Autoclave (OoA) prepregs. Several large, curved sandwich panels were fabricated at HITCO Carbon Composites. The aluminum honeycomb core sandwich panels are segments of a 1/16th arc from a 10 meter cylindrical barrel. Lessons learned highlight the manufacturing challenges required to produce light weight composite structures such as fairings for heavy lift launch vehicles.

  13. Small helicopter could find niche in remote heavy lift operations

    SciTech Connect

    Not Available

    1994-02-21

    A new helicopter specifically designed for external vertical lift operations, such as moving transportable rig components or seismic equipment in remote locations, operates more efficiently than most other medium or heavy-lift helicopters, according to manufacturer Kaman Aerospace. The single-pilot helicopter was designed as an aerial truck for efficient lifting of heavy loads but with the operating costs of a light-lift craft. The K-Max helicopter can lift more pounds of cargo per gallon of fuel consumed than other similar helicopters, according to Kaman. For example, to transport a 5,000-lb load at an elevation of 8,000 ft, the K-Max helicopter consumes 85 gal of fuel/hr. Under the same load conditions, the next most efficient commercially available helicopter consumes 160 gal of fuel/hr and requires two pilots. The 4,500-lb helicopter can lift 5,000 lb to an altitude of 8,000 ft or about 6,000 lb at low altitudes.

  14. Heavy Lifting at Work and Risk of Ischemic Heart Disease: Protocol for a Register-Based Prospective Cohort Study

    PubMed Central

    2014-01-01

    Background There are theoretical grounds to suspect that heavy lifting at work is an important risk factor for ischemic heart disease (IHD). However the relationship has not been sufficiently acknowledged by empirical studies. Positive and statistically significant associations have been found in studies that utilize self-reported exposure data. Such studies are, however, prone to reporting bias. All else equal, people with a poor cardiovascular fitness/health may have a higher propensity to perceive their work environment as heavy. Objective The study described in the present protocol aims to investigate the relationship between heavy lifting at work and IHD by use of material and methods that are free from reporting bias. Methods This is a register-based prospective cohort study. Male blue-collar workers in Denmark will be identified and followed through national registers, from 2001-2010, for hospital treatment or death due to IHD. Relative rates of IHD between “workers in occupations likely to involve heavy lifting” and “other blue-collar workers” will be estimated through Poisson regression. Results Results are expected to be ready in mid-2015. Conclusions Since this is not a randomized study, it cannot confirm etiological hypotheses. It may, however, confirm that employment in occupations that involve heavy lifting is a predictor for IHD and thereby lend support to the hypothesis of a causal relationship. PMID:25164612

  15. Shuttle-C, evolution to a heavy lift launch vehicle

    NASA Technical Reports Server (NTRS)

    Harsh, Marcellus G.

    1989-01-01

    NASA is defining an unmanned, expendable derivative of the Space Shuttle, called Shuttle-C, that can provide a near-term heavy lift launch capability. The major Shuttle-C program guidelines and objectives are outlined, and the background to the concept is reviewed. Possible Shuttle-C payloads and a typical mission are briefly described. The present status and goals of the Shuttle-C concept are considered.

  16. RFID Enabled Remote Structural Health Monitoring for Heavy Lifting Appliances

    Microsoft Academic Search

    Xubing Chen; Fan Zhou

    2010-01-01

    \\u000a To realize remote structural health monitoring for heavy lifting appliances, e.g., 500t gantry cranes, technologies of RFID\\u000a wireless sensor network, LabVIEW virtual instrument and health diagnosis expert system are empoyed to establish an integrated\\u000a system. The system is divided into three layers in logic structures: the data acquisition layer, the network communication\\u000a layer and the system service layer. In the

  17. Heavy-Lift for a New Paradigm in Space Operations

    NASA Technical Reports Server (NTRS)

    Morris, Bruce; Burkey, Martin

    2010-01-01

    NASA is developing an unprecedented heavy-lift capability to enable human exploration beyond low Earth orbit (LEO). This capability could also significantly enhance numerous other missions of scientific, national security, and commercial importance. That capability is currently configured as the Ares V cargo launch vehicle. This capability will eclipse the capability the United States lost with the retirement of the Saturn V. It is capable of launching roughly 53 percent more payload mass to trans lunar injection (TLI) and 30 percent more payload mass to LEO than its Apollo Program predecessor. Ares V is a major element of NASA's Constellation Program, which also includes the Ares I crew launch vehicle (CLV), Orion crew exploration vehicle (CEV), and a lunar lander for crew and cargo. As currently configured, Ares V will be capable of launching 413,800 pounds (187.7 mT) to LEO, 138,500 pounds (63 mT) direct to the Moon or 156,700 pounds (71.1 mT) in its dual-launch architecture role with Ares I. Its 33-foot (10 m) shroud provides unprecedented payload volume. Assessment of astronomy and planetary science payload requirements since spring 2008 has indicated that a Saturn V-class heavy-lift vehicle has the potential to support a range of payloads and missions. This vehicle configuration enables some missions previously considered difficult or impossible and enhances many others. Collaborative design/architecture inputs, exchanges, and analyses have already begun between scientists and payload developers. This early dialogue between NASA engineers and payload designers allows both communities to shape their designs and operational concepts to be mutually supportive to the extent possible with the least financial impact. This paper provides an overview of the capabilities of a heavy-lift vehicle to launch payloads with increased mass and/or volume and reduce technical and cost risk in both design and operations.

  18. Heavy Lift Vehicle (HLV) Avionics Flight Computing Architecture Study

    NASA Technical Reports Server (NTRS)

    Hodson, Robert F.; Chen, Yuan; Morgan, Dwayne R.; Butler, A. Marc; Sdhuh, Joseph M.; Petelle, Jennifer K.; Gwaltney, David A.; Coe, Lisa D.; Koelbl, Terry G.; Nguyen, Hai D.

    2011-01-01

    A NASA multi-Center study team was assembled from LaRC, MSFC, KSC, JSC and WFF to examine potential flight computing architectures for a Heavy Lift Vehicle (HLV) to better understand avionics drivers. The study examined Design Reference Missions (DRMs) and vehicle requirements that could impact the vehicles avionics. The study considered multiple self-checking and voting architectural variants and examined reliability, fault-tolerance, mass, power, and redundancy management impacts. Furthermore, a goal of the study was to develop the skills and tools needed to rapidly assess additional architectures should requirements or assumptions change.

  19. Heavy Lift Launch Vehicles for 1995 and Beyond

    NASA Technical Reports Server (NTRS)

    Toelle, R. (compiler)

    1985-01-01

    A Heavy Lift Launch Vehicle (HLLV) designed to deliver 300,000 lb to a 540 n mi circular polar orbit may be required to meet national needs for 1995 and beyond. The vehicle described herein can accommodate payload envelopes up to 50 ft diameter by 200 ft in length. Design requirements include reusability for the more expensive components such as avionics and propulsion systems, rapid launch turnaround time, minimum hardware inventory, stage and component flexibility and commonality, and low operational costs. All ascent propulsion systems utilize liquid propellants, and overall launch vehicle stack height is minimized while maintaining a reasonable vehicle diameter. The ascent propulsion systems are based on the development of a new liquid oxygen/hydrocarbon booster engine and liquid oxygen/liquid hydrogen upper stage engine derived from today's SSME technology. Wherever possible, propulsion and avionics systems are contained in reusable propulsion/avionics modules that are recovered after each launch.

  20. Ares V: Refining a New Heavy Lift Capability

    NASA Technical Reports Server (NTRS)

    Creech, Steve; Sumrall, Phil

    2008-01-01

    The Ares V cargo launch vehicle represents a significant new national commitment to expand human space exploration beyond low Earth orbit. Viewed more broadly, this new heavy-lift rocket will be an advancement over the national strategic capability lost when the Saturn V program ended more than three decades ago. The Ares V is one of two new launch vehicles being designed by NASA to support U.S. Space Exploration Policy. NASA selected the Ares I crew launch vehicle and the Ares V (Figure 1) during extensive independent and internal architecture and vehicle trade studies to complete the International Space Station, retire the current Space Shuttle fleet, return to the Moon by 2020, and journey to destinations beyond. These vehicles share components derived from the Apollo-era Saturn, Space Shuttle, and contemporary launch vehicle programs to provide safe, affordable, reliable, versatile sustainable space transportation to support national space goals for decades to come.

  1. Occupational health impacts: offshore crane lifts in life cycle assessment

    Microsoft Academic Search

    Johan Pettersen; Edgar G. Hertwich

    2008-01-01

    Background, Aim, and Scope  The identification and assessment of environmental tradeoffs is a strongpoint of life cycle assessment (LCA). A tradeoff made\\u000a in many product systems is the exchange of potential for occupational accidents with the additional use of energy and materials.\\u000a Net benefits of safety measures with respect to human health are best illustrated if the consequences avoided and health

  2. Minor heavy metal: A review on occupational and environmental intoxication

    PubMed Central

    Wiwanitkit, Viroj

    2008-01-01

    Heavy metal is widely used in industries and presents as a problematic environmental pollution. Some heavy metals, especially lead and mercury, are well described for their occupational and environmental intoxication whereas the other minor heavy metals are less concerned. In this article, the author will present the details of occupational and environmental minor heavy metal intoxication. This review focuses mainly on aluminum, tin, copper, manganese, chromium, cadmium and nickel. PMID:20040969

  3. High-precision position control of a heavy-lift manipulator in a dynamic environment

    E-print Network

    Garretson, Justin R. (Justin Richard)

    2005-01-01

    This thesis considers the control of a heavy-lift serial manipulator operating on the deck of a large ocean vessel. This application presents a unique challenge for high- precision control because the system must contend ...

  4. Force control of heavy lift manipulators for high precision insertion tasks

    E-print Network

    DiCicco, Matthew A. (Matthew Adam)

    2005-01-01

    The inherent strength of robotic manipulators can be used to assist humans in performing heavy lifting tasks. These robots reduce manpower, reduce fatigue, and increase productivity. This thesis deals with the development ...

  5. The relative importance of whole body vibration and occupational lifting as risk factors for low-back pain

    PubMed Central

    Palmer, K; Griffin, M; Syddall, H; Pannett, B; Cooper, C; Coggon, D

    2003-01-01

    Aims: To explore the impact of occupational exposure to whole body vibration (WBV) on low back pain (LBP) in the general population and to estimate the burden of LBP attributable to occupational WBV in comparison with that due to occupational lifting. Methods: A questionnaire including sections on WBV at work, LBP, and potential risk factors was mailed to a community sample of 22 194 men and women of working age. Sources and durations of exposure to occupational WBV were ascertained for the past week and personal vibration doses (eVDV) were estimated. Analysis was confined to subjects reporting exposures in the past week as typical of their work. Associations of LBP with eVDV, driving industrial vehicles, and occupational lifting were explored by logistic regression and attributable numbers were calculated. Results: Significant associations were found between daily lifting of weights greater than 10 kg at work and LBP, troublesome LBP (which made it difficult to put on hosiery), and sciatica (prevalence ratios 1.3 to 1.7); but the risk of these outcomes in both sexes varied little by eVDV and only weak associations were found with riding on industrial vehicles. Assuming causal associations, the numbers of cases of LBP in Britain attributable to occupational WBV were estimated to be 444 000 in men and 95 000 in women. This compared with an estimated 940 000 male cases and 370 000 female cases of LBP from occupational lifting. Conclusions: The burden of LBP in Britain from occupational exposure to WBV is smaller than that attributable to lifting at work. PMID:14504358

  6. Aeromechanical stability analysis of a multirotor vehicle model representing a hybrid heavy lift airship (HHLA)

    NASA Technical Reports Server (NTRS)

    Venkatesan, C.; Friedmann, P. P.

    1984-01-01

    Hybrid Heavy Lift Airship (HHLA) is a proposed candidate vehicle aimed at providing heavy lift capability at low cost. This vehicle consists of a buoyant envelope attached to a supporting structure to which four rotor systems, taken from existing helicopters are attached. Nonlinear equations of motion capable of modelling the dynamics of this coupled multi-rotor/support frame/vehicle system have been developed. Using these equations of motion the aeroelastic and aeromechanical stability analysis is performed aimed at identifying potential instabilities which could occur for this type of vehicle. The coupling between various blade, supporting structure and rigid body modes is identified. Furthermore, the effects of changes in buoyancy ratio (Buoyant lift/total weight) on the dynamic characteristics of the vehicle are studied. The dynamic effects found are of considerable importance for the design of such vehicles. The analytical model developed is also useful for studying the aeromechanical stability of single rotor and tandem rotor coupled rotor/fuselage systems.

  7. Aeromechanical stability analysis of a multirotor vehicle with application to hybrid heavy lift helicopter dynamics

    NASA Technical Reports Server (NTRS)

    Venkatesan, C.; Friedmann, P. P.

    1984-01-01

    The Hybrid Heavy Lift Helicopter (HHLH) is a potential candidate vehicle aimed at providing heavy lift capability at low cost. This vehicle consists of a buoyant envelope attached to a supporting structure. Four rotor systems are also attached to the supporting structure. Nonlinear equations of motion capable of modeling the dynamics of this multi-rotor/support frame/vehicle system have been developed and used to study the fundamental aeromechanical stability characteristics of this class of vehicles. The mechanism of coupling between the blades, supporting structure and rigid body modes is identified and the effect of buoyancy ratio (buoyant lift/total weight) on the vehicle dynamics is studied. It is shown that dynamics effects have a major role in the design of such vehicles. The analytical model developed is also useful for studying the aeromechanical stability of single rotor and tandem rotor coupled rotor/fuselage systems.

  8. The effects of atmospheric turbulence on a quadrotor heavy lift airship

    NASA Technical Reports Server (NTRS)

    Tischler, M. B.; Jex, H. R.

    1982-01-01

    The response of a quadrotor heavy lift airship to atmospheric turbulence is evaluated using a four-point input model. Results show interaction between gust inputs and the characteristic modes of the vehicle's response. Example loop closures demonstrate tradeoffs between response regulation and structural loads. Vehicle responses to a tuned discrete wave front compare favorably with the linear results and illustrate characteristic HLA motion.

  9. Occup Environ Med . Author manuscript Heavy manual work, exposure to vibration and Dupuytrens disease?'

    E-print Network

    Paris-Sud XI, Université de

    .descatha@rpc.aphp.fr > Abstract Introduction In view of the debate about occupational factors in Dupuytren s disease, the aim ; Occupational Diseases ; etiology ; Occupational Exposure ; adverse effects ; Occupations ; PopulationOccup Environ Med . Author manuscript Page /1 8 Heavy manual work, exposure to vibration

  10. Design of Adaptive Disturbance Controller for Heavy-Duty Lifting Pipe Heave Compensation System

    Microsoft Academic Search

    Xiao Tibing; Zhou Yuming; Long Jianjun; Zou Dapeng; Wu Baihai

    2009-01-01

    Introduced a heavy-duty heave compensation system for deep-sea mining lifting pipe and its complex controller which is composed of a position feedback controller, a speed feedback controller and a disturbance controller; based on BP neural network and the use of program software Visual C++6.0, designed an adaptive disturbance controller. Model experimental results indicate that the designed adaptive disturbance controller have

  11. Generic multi-body formulation of heavy lift airship equations of motion

    NASA Technical Reports Server (NTRS)

    Ringland, R. F.; Tischler, M. B.; Ashkenas, I. L.; Jex, H. R.

    1980-01-01

    This paper describes the formulation of a comprehensive set of equations which describe the dynamic behavior of a generic heavy lift airship (HLA). They are being used in a digital computer simulation to investigate the response dynamics and flying qualities of HLAs operating with various payloads in a variety of operational environments. A key feature is the separate treatment of each component body making up the HLA. This allows the analyst to vary the configuration (e.g., number of lift-propulsion units, presence or absence of slung payload, etc.) without rewriting the equations. It further provides measures of key structural and control loads acting on the HLA and eases the task of modeling wind disturbances.

  12. Definition of avionics concepts for a heavy lift cargo vehicle. Volume 1: Executive summary

    NASA Technical Reports Server (NTRS)

    1989-01-01

    A cost effective, multiuser simulation, test, and demonstration facility to support the development of avionics systems for future space vehicles is examined. The technology needs and requirements of future Heavy Lift Cargo Vehicles (HLCVs) are analyzed and serve as the basis for sizing of the avionics facility, although the lab is not limited in use to support of HLCVs. Volume 1 provides a summary of the vehicle avionics trade studies, the avionics lab objectives, a summary of the lab's functional requirements and design, physical facility considerations, and cost estimates.

  13. Definition of avionics concepts for a heavy lift cargo vehicle, volume 2

    NASA Technical Reports Server (NTRS)

    1989-01-01

    A cost effective, multiuser simulation, test, and demonstration facility to support the development of avionics systems for future space vehicles is defined. The technology needs and requirements of future Heavy Lift Cargo Vehicles (HLCVs) are analyzed and serve as the basis for sizing of the avionics facility although the lab is not limited in use to support of HLCVs. Volume 2 is the technical volume and provides the results of the vehicle avionics trade studies, the avionics lab objectives, the lab's functional requirements and design, physical facility considerations, and a summary cost estimate.

  14. Drinking habits and prevalence of heavy drinking among occupational healthcare patients

    PubMed Central

    Kaarne, Tiina; Aalto, Mauri; Kuokkanen, Martti; Seppä, Kaija

    2009-01-01

    Objective To estimate the proportion of heavy drinkers among occupational healthcare patients and evaluate their characteristics. Design Patients visiting their doctor in six occupational health clinics were asked to complete a questionnaire containing the Alcohol Use Disorders Identification Test (AUDIT) and other questions concerning health. Setting Occupational health services. Subjects A total of 757 patients participated in the study. Main outcome measure Heavy drinking was defined as having a score of 10 or more (men) or 8 or more (women) in the AUDIT questionnaire. Results Of the men 114 (29%) and of the women 48 (13%) were heavy drinkers. Only smoking differentiated both male and female heavy drinkers from moderate drinkers among the clinically relevant characteristics. Conclusion There are a considerable number of heavy drinkers among occupational healthcare patients. Heavy drinkers do not have any particularly specific characteristics except for the drinking that distinguish them from other patients. Thus, screening is necessary to identify heavy drinkers in occupational healthcare settings. PMID:19065452

  15. NASA's Space Launch System: A Heavy-Lift Platform for Entirely New Missions

    NASA Technical Reports Server (NTRS)

    Creech, Stephen A.

    2012-01-01

    The National Aeronautics and Space Administration s (NASA's) Space Launch System (SLS) will contribute a new capability for human space flight and scientific missions beyond low-Earth orbit. The SLS Program, managed at NASA s Marshall Space Fight Center, will develop the heavy-lift vehicle that will launch the Orion Multi-Purpose Crew Vehicle (MPCV), equipment, supplies, and major science missions. Orion will carry crews to space, provide emergency abort capability, sustain the crew during space travel, and provide safe reentry from deep-space return velocities. Supporting Orion s first autonomous flight to lunar orbit and back in 2017 and its first crewed flight in 2021, the SLS ultimately offers a flexible platform for both human and scientific exploration. The SLS plan leverages legacy infrastructure and hardware in NASA s inventory, as well as continues with advanced propulsion technologies now in development, to deliver an initial 70 metric ton (t) lift capability in 2017, evolving to a 130-t capability after 2021, using a block upgrade approach. This paper will give an overview of the SLS design and management approach against a backdrop of the missions it will support. It will detail the plan to deliver the initial SLS capability to the launch pad in the near term, as well as summarize the innovative approaches the SLS team is applying to deliver a safe, affordable, and sustainable long-range capability for entirely new missions opening a new realm of knowledge and a world of possibilities for multiple partners. Design reference missions that the SLS is being planned to support include asteroids, Lagrange Points, and Mars, among others. The Agency is developing its mission manifest in parallel with the development of a heavy-lift flagship that will dramatically increase total lift and volume capacity beyond current launch vehicle options, reduce trip times, and provide a robust platform for conducting new missions destined to rewrite textbooks with the information they deliver, while creating a framework for further collaboration among domestic and international partners, and potentially spurring economic expansion into new markets.

  16. Occupational requirements as compared to worker capabilities with respect to total weight lifted per day

    E-print Network

    Narvaez, Angela Marae

    1998-01-01

    The aim of this study was to determine if the amount of weight an employee was required to lift per day would affect the capabilities of that employee in terms of anthropometrics, aerobic capacity, dynamic strength and grip strength. In addition...

  17. Simulation of Heavy Lift Airship dynamics over large ranges of incidence and speed

    NASA Technical Reports Server (NTRS)

    Tischler, M. B.; Jex, H. R.; Ringland, R. F.

    1981-01-01

    A nonlinear, multibody, six-degrees-of-freedom digital simulation has been developed to study generic Heavy Lift Airship (HLA) dynamics and control. The basic aerodynamic functions developed to model the hull, tail, and rotor loads continuously over all incidence ranges are reviewed and applied to a Quadrotor HLA with a low fineness ratio hull and a small vee-tail. Trim calculations for a test vehicle suggest control power deficiencies in crosswind stationkeeping for the unloaded vehicle. Gust responses show the importance of correctly calculating loads due to accelerated relative motion of air and hull. Numerically linearized dynamics for the test vehicle show the existence of a divergent yaw mode, and an oscillatory pitch mode whose stability characteristics are sensitive to flight speed. A considerable improvement in the vehicle's stability and response results from a simple multi-axis closed-loop control system operating on the rotors and propeller blades.

  18. Structure and properties of polyethylene films used in heavy lift balloons

    NASA Technical Reports Server (NTRS)

    Khoury, F.; Crissman, J. M.; Fanconi, B. M.; Wagner, H. L.; Botz, L. H.

    1985-01-01

    The following features of five polyethylene films used by NASA in the construction of heavy lift balloons have been examined: molecular weight, molecular weight distribution, branching, melting behavior, density, surface texture, birefringence, orientation of crystalline regions, unlaxial deformation in the machine and transverse directions, and the effect of sample geometry and strain rate on deformation behavior. The goal of this exploratory study was to determine whether there are significant differences in any of the above mentioned features, or combination of features between the films. The acquisition of such information is a first step towards determining whether there are any specific correlations between film characteristics and the incidence of catastrophic failure of balloons during ascent through the troposphere. This exploratory study has resulted in the identification of similarities and differences between various features of the films.

  19. Heavy-lift vehicle-launched Space Station method and apparatus

    NASA Technical Reports Server (NTRS)

    Wade, Donald C. (inventor); Delafuente, Horacio M. (inventor); Berka, Reginald B. (inventor); Rickman, Steven L. (inventor); Castro, Edgar O. (inventor); Nagy, Kornel (inventor); Wesselski, Clarence J. (inventor); Pelischek, Timothy E. (inventor); Schliesing, John A. (inventor)

    1995-01-01

    Methods and apparatus are provided for a single heavy-lift launch to place a complete, operational space station on-orbit. A payload including the space station takes the place of a shuttle orbiter using the launch vehicle of the shuttle orbiter. The payload includes a forward shroud, a core module, a propulsion module, and a transition module between the core module and the propulsion module. The essential subsystems are preintegrated and verified on Earth. The core module provides means for attaching international modules with minimum impact to the overall design. The space station includes six control moment gyros for selectably operating in either LVLH (local-vertical local-horizontal) or SI (solar inertial) flight modes.

  20. ESC-B: The Cryogenic Upper Stage for Europe's Heavy Lift Launcher Ariane 5ECB

    NASA Astrophysics Data System (ADS)

    Juhls, A.

    2002-01-01

    -A. Juhls, Astrium GmbH -M. Lepelletier, Snecma Moteurs -JM. Bahu, CNES -C. Poincheval, CNES. In the year 1998 the European ministerial council decided to initiate the Ariane 5 Plus programme in order to upgrade the European heavy lift launcher Ariane 5. The market was changing more rapidly than predicted showing steadily growing satellite mass and the demand for flexible missions while strong competitors were intensifying their preparations to enter the commercial business. The answer was to improve the Ariane 5 launcher by modifying the cryogenic first (or lower ?) stage and the solid boosters and by introducing two cryogenic upper stages in two steps: In order to cope with the short term need of a significant growth of GTO lift capacity up to 10 t the first denoted ESC-A shall enter commercial service in 2002. Four years later a more powerful second version shall take over enabling a GTO performance of 12 t and providing versatile mission capability. The paper will focus on this new cryogenic upper stage denoted ESC-B giving first a general description of main characteristics and constituents. The article will highlight different challenging aspects of the ESC-B development: Ambitious economical conditions regarding both limited development budgets and the strong need to reduce production cost require improved working methods and an adjustment of the conventional development logic, in particular regarding new verification methods. Furthermore Europe is now facing the complex combination of versatile mission capability together with a powerful cryogenic upper stage. The paper will present the approach to define reasonable mission scenarios in order to cover customer demands while avoiding too stringent system requirements. Along with VINCI, Europe's first expander cycle type engine featuring an extendable nozzle dedicated subsystems will be described which allow 4 re-ignitions and 6 hours of ballistic flight. The paper concludes with the summary of the development planning aiming at a first launch of ESC-B in 2006.

  1. Navier-Stokes Simulation of a Heavy Lift Slowed-Rotor Compound Helicopter Configuration

    NASA Technical Reports Server (NTRS)

    Allan, Brian G.; Jenkins, Luther N.; Yao, Chung-Sheng; Bartram, Scott M.; Hallissy, Jim B.; Harris, Jerome; Noonan, Kevin W.; Wong, Oliver D.; Jones, Henry E.; Malovrh, Brendon D.; reis, Deane G.; Mace, W. Derry

    2009-01-01

    Time accurate numerical simulations were performed using the Reynolds-averaged Navier-Stokes (RANS) flow solver OVERFLOW for a heavy lift, slowed-rotor, compound helicopter configuration, tested at the NASA Langley 14- by 22-Foot Subsonic Tunnel. The primary purpose of these simulations is to provide support for the development of a large field of view Particle Imaging Velocimetry (PIV) flow measurement technique supported by the Subsonic Rotary Wing (SRW) project under the NASA Fundamental Aeronautics program. These simulations provide a better understanding of the rotor and body wake flows and helped to define PIV measurement locations as well as requirements for validation of flow solver codes. The large field PIV system can measure the three-dimensional velocity flow field in a 0.914m by 1.83m plane. PIV measurements were performed upstream and downstream of the vertical tail section and are compared to simulation results. The simulations are also used to better understand the tunnel wall and body/rotor support effects by comparing simulations with and without tunnel floor/ceiling walls and supports. Comparisons are also made to the experimental force and moment data for the body and rotor.

  2. Update on the Ares V to Support Heavy Lift for U.S. Space Exploration Policy

    NASA Technical Reports Server (NTRS)

    Sumrall, John P.; Creech, Steve

    2008-01-01

    When NASA's Ares V cargo launch vehicle begins flying late next decade, its capabilities will significantly exceed the 1960s-era Saturn V. It will send more crew and cargo to more places on the lunar surface than Apollo and provide ongoing support to a permanent lunar outpost that will open the Moon to greater exploration, science and adventure than ever before. Moreover, it will restore the United States heavy-lift capability, which can support human and robotic exploration for decades to come. Ares V remains in a pre-design analysis cycle stage pending a planned Authority to Proceed (ATP) in late 2010. Ares V benefits from the decision to draw from heritage hardware and its commonality with the Ares I crew launch vehicle, which completed its preliminary design review (PDR) in September 2008. Most of the work on Ares V to date has been focused on refining the vehicle design through a variety of internal studies. This paper will provide background information on the Ares V evolution, emphasizing the vehicle configuration as it exists today.

  3. Advanced Transportation System Studies Technical Area 2 (TA-2) Heavy Lift Launch Vehicle Development Contract. Volume 2; Technical Results

    NASA Technical Reports Server (NTRS)

    1995-01-01

    The sections in this report include: Single Stage to Orbit (SSTO) Design Ground-rules; Operations Issues and Lessons Learned; Vertical-Takeoff/Landing Versus Vertical-Takeoff/Horizontal-Landing; SSTO Design Results; SSTO Simulation Results; SSTO Assessment Results; SSTO Sizing Tool User's Guide; SSto Turnaround Assessment Report; Ground Operations Assessment First Year Executive Summary; Health Management System Definition Study; Major TA-2 Presentations; First Lunar Outpost Heavy Lift Launch Vehicle Design and Assessment; and the section, Russian Propulsion Technology Assessment Reports.

  4. Advanced grid-stiffened composite shells for applications in heavy-lift helicopter rotor blade spars

    NASA Astrophysics Data System (ADS)

    Narayanan Nampy, Sreenivas

    Modern rotor blades are constructed using composite materials to exploit their superior structural performance compared to metals. Helicopter rotor blade spars are conventionally designed as monocoque structures. Blades of the proposed Heavy Lift Helicopter are envisioned to be as heavy as 800 lbs when designed using the monocoque spar design. A new and innovative design is proposed to replace the conventional spar designs with light weight grid-stiffened composite shell. Composite stiffened shells have been known to provide excellent strength to weight ratio and damage tolerance with an excellent potential to reduce weight. Conventional stringer--rib stiffened construction is not suitable for rotor blade spars since they are limited in generating high torsion stiffness that is required for aeroelastic stability of the rotor. As a result, off-axis (helical) stiffeners must be provided. This is a new design space where innovative modeling techniques are needed. The structural behavior of grid-stiffened structures under axial, bending, and torsion loads, typically experienced by rotor blades need to be accurately predicted. The overall objective of the present research is to develop and integrate the necessary design analysis tools to conduct a feasibility study in employing grid-stiffened shells for heavy-lift rotor blade spars. Upon evaluating the limitations in state-of-the-art analytical models in predicting the axial, bending, and torsion stiffness coefficients of grid and grid-stiffened structures, a new analytical model was developed. The new analytical model based on the smeared stiffness approach was developed employing the stiffness matrices of the constituent members of the grid structure such as an arch, helical, or straight beam representing circumferential, helical, and longitudinal stiffeners. This analysis has the capability to model various stiffening configurations such as angle-grid, ortho-grid, and general-grid. Analyses were performed using an existing state-of-the-art and newly developed model to predict the torsion, bending, and axial stiffness of grid and grid-stiffened structures with various stiffening configurations. These predictions were compared to results generated using finite element analysis (FEA) to observe excellent correlation (within 6%) for a range of parameters for grid and grid-stiffened structures such as grid density, stiffener angle, and aspect ratio of the stiffener cross-section. Experimental results from cylindrical grid specimen testing were compared with analytical prediction using the new analysis. The new analysis predicted stiffness coefficients with nearly 7% error compared to FEA results. From the parametric studies conducted, it was observed that the previous state-of-the-art analysis on the other hand exhibited errors of the order of 39% for certain designs. Stability evaluations were also conducted by integrating the new analysis with established stability formulations. A design study was conducted to evaluate the potential weight savings of a simple grid-stiffened rotor blade spar structure compared to a baseline monocoque design. Various design constraints such as stiffness, strength, and stability were imposed. A manual search was conducted for design parameters such as stiffener density, stiffener angle, shell laminate, and stiffener aspect ratio that provide lightweight grid-stiffened designs compared to the baseline. It was found that a weight saving of 9.1% compared to the baseline is possible without violating any of the design constraints.

  5. Lift truck safety review

    SciTech Connect

    Cadwallader, L.C.

    1997-03-01

    This report presents safety information about powered industrial trucks. The basic lift truck, the counterbalanced sit down rider truck, is the primary focus of the report. Lift truck engineering is briefly described, then a hazard analysis is performed on the lift truck. Case histories and accident statistics are also given. Rules and regulations about lift trucks, such as the US Occupational Safety an Health Administration laws and the Underwriter`s Laboratories standards, are discussed. Safety issues with lift trucks are reviewed, and lift truck safety and reliability are discussed. Some quantitative reliability values are given.

  6. Ultra-heavy vertical lift system: The Heli-Stat. [helicopter - airship combination for materials handling

    NASA Technical Reports Server (NTRS)

    Piasecki, F. N.

    1975-01-01

    A hybrid VTOL airship which is combined with helicopters is evaluated. The static lift of the airship supports approximately the full empty weight of the entire assembly. The helicopter rotors furnish the lift to support the payload as well as the propulsion and control about all axes. Thus existing helicopters, with no new technology required, can be made to lift payloads of ten times the capacity of each one alone, and considerably more than that of any airship built so far. A vehicle is described which has a 75-ton payload, based on four existing CH-53D helicopters and an airship of 3,600,000 cu. ft. The method of interconnection is described along with discussion of control, instrumentation, drive system and critical design conditions. The vertical lift and positioning capabilities of this vehicle far exceed any other means available today, yet can be built with a minimum of risk, development cost and time.

  7. Gender specific analysis of occupational diseases of the low back caused by carrying, lifting or extreme trunk flexion—use of a prevention index to identify occupations with high prevention needs

    PubMed Central

    Thiede, Markus; Liebers, Falk; Seidler, Andreas; Gravemeyer, Stefan; Latza, Ute

    2014-01-01

    Background Gender specific analysis of the occupational disease of the lumbar spine caused by carrying, lifting, or extreme trunk flexion in Germany (OD No.2108) with the aim to identify areas of focus for prevention and research with a prevention index (PI). Methods Data from the German Statutory Accident Insurance stratified by gender are shown. Results From 2002 until 2009 there were 2,877 confirmed cases of an OD No. 2108 (40.1% male and 59.1% female). The PI indicated the highest prevention need for female nursing/midwifery associate professionals and male building frame and related trades workers. Patient transfer and working in extremely bent posture were the most frequent exposures. Conclusions The identified occupations with high need for prevention among men come from nearly all major occupational groups whereas women cluster in occupational groups from the health and care sectors. Am. J. Ind. Med. 57:233–244, 2014. © 2013 The Authors. American Journal of Industrial Medicine Published by Wiley Periodicals, Inc. PMID:24243091

  8. Advanced Transportation System Studies Technical Area 2 (TA-2) Heavy Lift Launch Vehicle Development Contract. Volume 2; Technical Results

    NASA Technical Reports Server (NTRS)

    1995-01-01

    The purpose of the Advanced Transportation System Studies (ATSS) Technical Area 2 (TA-2) Heavy Lift Launch Vehicle Development contract was to provide advanced launch vehicle concept definition and analysis to assist NASA in the identification of future launch vehicle requirements. Contracted analysis activities included vehicle sizing and performance analysis, subsystem concept definition, propulsion subsystem definition (foreign and domestic), ground operations and facilities analysis, and life cycle cost estimation. This document is Volume 2 of the final report for the contract. It provides documentation of selected technical results from various TA-2 analysis activities, including a detailed narrative description of the SSTO concept assessment results, a user's guide for the associated SSTO sizing tools, an SSTO turnaround assessment report, an executive summary of the ground operations assessments performed during the first year of the contract, a configuration-independent vehicle health management system requirements report, a copy of all major TA-2 contract presentations, a copy of the FLO launch vehicle final report, and references to Pratt & Whitney's TA-2 sponsored final reports regarding the identification of Russian main propulsion technologies.

  9. Advanced transportation system studies technical area 2 (TA-2): Heavy lift launch vehicle development. volume 3; Program Cost estimates

    NASA Technical Reports Server (NTRS)

    McCurry, J. B.

    1995-01-01

    The purpose of the TA-2 contract was to provide advanced launch vehicle concept definition and analysis to assist NASA in the identification of future launch vehicle requirements. Contracted analysis activities included vehicle sizing and performance analysis, subsystem concept definition, propulsion subsystem definition (foreign and domestic), ground operations and facilities analysis, and life cycle cost estimation. The basic period of performance of the TA-2 contract was from May 1992 through May 1993. No-cost extensions were exercised on the contract from June 1993 through July 1995. This document is part of the final report for the TA-2 contract. The final report consists of three volumes: Volume 1 is the Executive Summary, Volume 2 is Technical Results, and Volume 3 is Program Cost Estimates. The document-at-hand, Volume 3, provides a work breakdown structure dictionary, user's guide for the parametric life cycle cost estimation tool, and final report developed by ECON, Inc., under subcontract to Lockheed Martin on TA-2 for the analysis of heavy lift launch vehicle concepts.

  10. A logistics and potential hazard study of propellant systems for a Saturn 5 derived heavy lift (three-stage core) launch vehicle

    NASA Technical Reports Server (NTRS)

    Whitney, E. Dow

    1992-01-01

    The Bush Administration has directed NASA to prepare for a return to the Moon and on to Mars - the Space Exploration Initiative. To meet this directive, powerful rocket boosters will be required in order to lift payloads that may reach the half-million pound range into low earth orbit. In this report an analysis is presented on logistics and potential hazards of the propellant systems envisioned for future Saturn 5 derived heavy lift launch vehicles. In discussing propellant logistics, particular attention has been given to possible problems associated with procurement, transportation, and storage of RP-1, HL2, and LOX, the heavy lift launch vehicle propellants. Current LOX producing facilities will need to be expanded and propellant storage and some support facilities will require relocation if current Launch Pads 39A and/or 39B are to be used for future heavy noise-abatement measures. Included in the report is a discussion of suggested additional studies, primarily economic and environmental, which should be undertaken in support of the goals of the Space Exploration Initiative.

  11. Individual and occupational risk factors for knee osteoarthritis: results of a case-control study in Germany

    Microsoft Academic Search

    André Klussmann; Hansjürgen Gebhardt; Matthias Nübling; Falk Liebers; Emilio Quirós Perea; Wolfgang Cordier; Lars V von Engelhardt; Markus Schubert; Andreas Dávid; Bertil Bouillon; Monika A Rieger

    2010-01-01

    INTRODUCTION: A number of occupational risk factors are discussed in relation to the development and progress of knee joint diseases (for example, working in a kneeling or squatting posture, lifting and carrying heavy weights). Besides the occupational factors, a number of individual risk factors are important. The distinction between work-related and other factors is crucial in assessing the risk and

  12. The effect of an on-body personal lift assist device (PLAD) on fatigue during a repetitive lifting task.

    PubMed

    Lotz, Christy A; Agnew, Michael J; Godwin, Alison A; Stevenson, Joan M

    2009-04-01

    Occupations demanding frequent and heavy lifting are associated with an increased risk of injury. A personal lift assist device (PLAD) was designed to assist human muscles through the use of elastic elements. This study was designed to determine if the PLAD could reduce the level of general and local back muscle fatigue during a cyclical lifting task. Electromyography of two erector spinae sites (T9 and L3) was recorded during a 45-min lifting session at six lifts/lowers per minute in which male participants (n=10) lifted a box scaled to represent 20% of their maximum back extensor strength. The PLAD device reduced the severity of muscular fatigue at both muscle sites. RMS amplitude increased minimally (22% and 26%) compared to the no-PLAD condition (104% and 88%). Minimal median frequency decreases (0.33% and 0.41%) were observed in the PLAD condition compared to drops of 12% and 20% in the no-PLAD condition. The PLAD had an additional benefit of minimizing pre-post changes in muscular strength and endurance. The PLAD also resulted in a significantly lower rate of perceived exertion across the lifting session. It was concluded that the PLAD was effective at decreasing the level of back muscular fatigue. PMID:18055220

  13. Tornado lift

    E-print Network

    Alexander Ivanchin

    2010-02-06

    It is shown that one of the causes for tornado is Tornado Lift. At increasing vortex diameter its kinetic energy decreases to keep the moment of momentum constant. A kinetic energy gradient of such vortex is Tornado Lift. Evaluation shows that contribution of Tornado Lift in air lifting in a tornado is comparable to buoyancy according to the order of magnitude.

  14. Tornado lift

    E-print Network

    Ivanchin, Alexander

    2010-01-01

    It is shown that one of the causes for tornado is Tornado Lift. At increasing vortex diameter its kinetic energy decreases to keep the moment of momentum constant. A kinetic energy gradient of such vortex is Tornado Lift. Evaluation shows that contribution of Tornado Lift in air lifting in a tornado is comparable to buoyancy according to the order of magnitude.

  15. Forehead lift

    MedlinePLUS

    ... or with other procedures such as a facelift , eyelid surgery, or nose reshaping . The surgery can be done ... sides even. If you have already had plastic surgery to lift your upper eyelids, a forehead lift may not be recommended because ...

  16. Eyelid lift

    MedlinePLUS

    ... lift to improve their appearance. This is called cosmetic or elective surgery. The eyelid lift may be done alone or ... Codere F, Tucker N. Cosmetic blepharoplasty and browplasty. In: ... Skin. 2nd ed . Philadelphia, PA: Elsevier Mosby; 2010:chap 39.

  17. Advanced underwater lift device

    NASA Technical Reports Server (NTRS)

    Flanagan, David T.; Hopkins, Robert C.

    1993-01-01

    Flexible underwater lift devices ('lift bags') are used in underwater operations to provide buoyancy to submerged objects. Commercially available designs are heavy, bulky, and awkward to handle, and thus are limited in size and useful lifting capacity. An underwater lift device having less than 20 percent of the bulk and less than 10 percent of the weight of commercially available models was developed. The design features a dual membrane envelope, a nearly homogeneous envelope membrane stress distribution, and a minimum surface-to-volume ratio. A proof-of-concept model of 50 kg capacity was built and tested. Originally designed to provide buoyancy to mock-ups submerged in NASA's weightlessness simulators, the device may have application to water-landed spacecraft which must deploy flotation upon impact, and where launch weight and volume penalties are significant. The device may also be useful for the automated recovery of ocean floor probes or in marine salvage applications.

  18. Does that look heavy to you? Perceived weight judgment in lifting actions in younger and older adults

    PubMed Central

    Maguinness, Corrina; Setti, Annalisa; Roudaia, Eugenie; Kenny, Rose Anne

    2013-01-01

    When interpreting other people's movements or actions, observers may not only rely on the visual cues available in the observed movement, but they may also be able to “put themselves in the other person's shoes” by engaging brain systems involved in both “mentalizing” and motor simulation. The ageing process brings changes in both perceptual and motor abilities, yet little is known about how these changes may affect the ability to accurately interpret other people's actions. Here we investigated the effect of ageing on the ability to discriminate the weight of objects based on the movements of actors lifting these objects. Stimuli consisted of videos of an actor lifting a small box weighing 0.05–0.9 kg or a large box weighting 3–18 kg. In a four-alternative forced-choice task, younger and older participants reported the perceived weight of the box in each video. Overall, older participants were less sensitive than younger participants in discriminating the perceived weight of lifted boxes, an effect that was especially pronounced in the small box condition. Weight discrimination performance was better for the large box compared to the small box in both groups, due to greater saliency of the visual cues in this condition. These results suggest that older adults may require more salient visual cues to interpret the actions of others accurately. We discuss the potential contribution of age-related changes in visual and motor function on the observed effects and suggest that older adults' decline in the sensitivity to subtle visual cues may lead to greater reliance on visual analysis of the observed scene and its semantic context. PMID:24324423

  19. Prevention of occupational Back Pain.

    PubMed

    Al-Otaibi, Sultan T

    2015-01-01

    This paper reviews scientific research on occupational back pain and focuses on prevention of this problem. It discusses some of the challenges of translating the evidence of this multi-factorial condition into policy. Medical science is currently unable to clearly distinguish between back pain caused by work and that possibly due to other causes but which affects the individual's capacity to work. Back pain affects the vast majority of people at some point in their lives and is very costly to both the health care system and the industry. Evidence suggests that heavy lifting, driving, and vibration of the whole body are linked to occupational back pain. Once the risk factors for occupational back pain are identified, an otherwise chronic and disabling condition can be prevented in the majority of patients. As explained in this article, three levels of prevention for occupational back pain have been reported as effective. Failure to implement preventive measures may lead to a high incidence of occupational back pain. PMID:25983601

  20. The influence of occupation on lumbar degeneration.

    PubMed

    Videman, T; Battié, M C

    1999-06-01

    In many countries, back problems have been defined as occupational injuries. The belief underlying this injury model is that back symptoms are caused primarily by work-related mechanical factors that damage the structures of the spine, either through a single incident or repeated loading. Although the etiopathogenesis of degenerative findings in the disc and their relation to pain are poorly understood, changes in the disc are suspected of underlying many back symptoms. The focus of this article is on examining the relation between occupational factors and disc degeneration. Occupational factors suspected of accelerating spinal degeneration include accident-related trauma; heavy physical loading and materials handling, including lifting, bending, and twisting; prolonged sitting; and sustained nonneutral work postures and vehicular driving. There is evidence to suggest that occupational exposures have an effect on disc degeneration. However, these factors explain little of the variability in degeneration found in the adult population. Furthermore, the lack of a clear dose-response relation between time spent in various occupational loading conditions and degenerative findings adds to doubts about a strong causal link. The contribution of suspected occupational risk factors appears to be particularly modest when compared with familial influences, which reflect the combined effects of genes and early childhood environment. These findings challenge the dominant role assumed for occupational loading in disc degeneration and associated back problems, and suggest a more complex etiology. PMID:10361670

  1. Numerical simulation of the 16-19 October 1994 southeast Texas heavy rain event: precipitation results and diagnosis of the lifting mechanism 

    E-print Network

    Petroski, Thomas John

    2000-01-01

    the lifting mechanism that was not apparent during the actual event. Several diagnostic techniques were used to assess vertical motion. These techniques included positive vorticity advection, positive isothermal vorticity advection, and quasi...

  2. New life for heavy lift

    Microsoft Academic Search

    Richard Demeis

    1991-01-01

    The advisory committee to NASA on overall approaches for implementing the U.S. space program in the years ahead has concluded that Shuttle missions should only be flown when a human presence is necessary. It was noted that reducing the number of missions would extend the life of the existing fleet and retain the number of orbiters required at the presently

  3. An assessment of dermal exposure to heavy fuel oil (HFO) in occupational settings.

    PubMed

    Christopher, Yvette; Van Tongeren, Martie; Urbanus, Jan; Cherrie, John W

    2011-04-01

    Heavy fuel oil (HFO) components are a group of heavy petroleum streams produced in oil refineries from crude oil. Due to its physicochemical properties, the dermal route is an important route of exposure. However, no information on dermal exposure levels for HFO has previously been published. A method for measuring dermal HFO levels was developed using wipe sampling and measuring phenanthrene and naphthalene as markers of HFO exposure. Measurement surveys were carried out in four different types of facilities: oil refineries, distribution terminals, energy providers, and an engine building and repair company. Dermal wipe samples were collected from different anatomical regions: neck, hands, and forearms. The frequency of tasks with potential for dermal HFO exposure was generally low at these facilities, with the exception of the distribution terminals and the engine building and repair site. The geometric mean (GM) dermal load on the hands was ?0.1 ?g cm(-2) for both left and right hand and 0.013 and 0.019 ?g cm(-2) for the left and right forearm, respectively. With one exception, all results from the neck samples were below the limit of detection. The highest dermal loads for the hands and forearms were found in the engine building and repair facility (hands: GM = 1.6 ?g cm(-2); forearms: GM = 0.41 ?g cm(-2)). The tasks with the highest dermal loads were the maintenance (hands: GM = 1.7 ?g cm(-2)) and cleaning tasks (hands: GM = 0.24 ?g cm(-2)). Actual dermal loads were low when compared with workplace dermal exposure measurements reported by other researchers for similar scenarios with other substances. This may be explained by high compliance of gloves use by workers during HFO handling tasks and likely avoidance of contact with HFO due to its high viscosity and the requirement to keep HFO at elevated temperatures during storage, transport, and use. PMID:21402869

  4. Total facelift: forehead lift, midface lift, and neck lift.

    PubMed

    Park, Dong Man

    2015-03-01

    Patients with thick skin mainly exhibit the aging processes of sagging, whereas patients with thin skin develop wrinkles or volume loss. Asian skin is usually thicker than that of Westerners; and thus, the sagging of skin due to aging, rather than wrinkling, is the chief problem to be addressed in Asians. Asian skin is also relatively large in area and thick, implying that the weight of tissue to be lifted is considerably heavier. These factors account for the difficulties in performing a facelift in Asians. Facelifts can be divided into forehead lift, midface lift, and lower face lift. These can be performed individually or with 2-3 procedures combined. PMID:25798381

  5. Usability of the revised NIOSH lifting equation

    Microsoft Academic Search

    Patrick G. Dempsey

    2002-01-01

    Following the revision of the 1981 National Institute for Occupational Safety and Health (NIOSH) lifting equation, research needs related to the new equation were outlined. Aside from epidemiological studies, the need to evaluate the usability of the 1991 NIOSH equation in realistic work environments was expressed. This paper reports on extensive experiences with training users and application of the equation

  6. Revised NIOSH equation for the design and evaluation of manual lifting tasks

    Microsoft Academic Search

    THOMAS R. WATERS; VERN PUTZ-ANDERSON; ARUN GARG; LAWRENCE J. FINE

    1993-01-01

    In 1985, the National Institute for Occupational Safety and Health (NIOSH) convened an ad hoc committee of experts who reviewed the current literature on lifting, recommend criteria for defining lifting capacity, and in 1991 developed a revised lifting equation. Subsequently, NIOSH developed the documentation for the equation and played a prominent role in recommending methods for interpreting the results of

  7. Displacement-load force-perceived weight relationships in lifting objects with power-assist

    NASA Astrophysics Data System (ADS)

    Rahman, S. M. Mizanoor; Ikeura, Ryojun; Nobe, Masaya; Sawai, Hideki

    2010-01-01

    This paper deals with the design of a 1-DOF power assist system (PAS) for lifting objects in vertical direction based on a hypothesis that pertains to operator's weight perception. We particularly studied the relationships among object's displacement, load force (vertical lifting force) and perceived weight for the objects lifted with the PAS. We also compared the load force features for power-assist-lifted objects to that for manually lifted objects for equal heaviness. Finally, we proposed using the findings to develop human-friendly PASs for lifting heavy objects in industries such as construction, military operations, manufacturing and assembly, logistics and transport, mining etc.

  8. Displacement-load force-perceived weight relationships in lifting objects with power-assist

    NASA Astrophysics Data System (ADS)

    Rahman, S. M. Mizanoor; Ikeura, Ryojun; Nobe, Masaya; Sawai, Hideki

    2009-12-01

    This paper deals with the design of a 1-DOF power assist system (PAS) for lifting objects in vertical direction based on a hypothesis that pertains to operator's weight perception. We particularly studied the relationships among object's displacement, load force (vertical lifting force) and perceived weight for the objects lifted with the PAS. We also compared the load force features for power-assist-lifted objects to that for manually lifted objects for equal heaviness. Finally, we proposed using the findings to develop human-friendly PASs for lifting heavy objects in industries such as construction, military operations, manufacturing and assembly, logistics and transport, mining etc.

  9. Propulsive lift noise

    Microsoft Academic Search

    Martin R. Fink

    1991-01-01

    Propulsive life noise is the increase in noise that occurs when airframe surfaces are placed in the propulsive system's exhaust to increase their lift force. Increased local flow velocities and turbulence levels, due to the propulsive system exhaust gases passing along the airframe lifting surfaces, cause an increase in maximum lift coefficient. The airplane's flight speed required for takeoff and

  10. Occupancy Agreement Occupancy Agreement

    E-print Network

    Botea, Adi

    and conditions of this Agreement. Full Occupancy Fee (Tariff)* http://rcc.anu.edu.au/fees.php Room Deposit The amount notified to the Occupant in the letter of offer. *The Full Occupancy Fee (Tariff) represents the market or standard occupancy fee (tariff) for a particular room type. The parties agree as follows #12

  11. Occupational Physical Loading Tasks and Knee Osteoarthritis: A Review of the Evidence

    PubMed Central

    Ezzat, Allison M.

    2014-01-01

    ABSTRACT Purpose: To perform a systematic review with best evidence synthesis examining the literature on the relationship between occupational loading tasks and knee osteoarthritis (OA). Methods: Two databases were searched to identify articles published between 1946 and April, 2011. Eligible studies were those that (1) included adults reporting on their employment history; (2) measured individuals' exposure to work-related activities with heavy loading in the knee joint; and (3) identified presence of knee OA (determined by X-ray), cartilage defects associated with knee OA (identified by magnetic resonance imaging), or joint replacement surgery. Results: A total of 32 articles from 31 studies met the inclusion criteria. We found moderate evidence that combined heavy lifting and kneeling is a risk factor for knee OA, with odds ratios (OR) varying from 1.8 to 7.9, and limited evidence for heavy lifting (OR=1.4–7.3), kneeling (OR=1.5–6.9), stair climbing (OR=1.6–5.1), and occupational groups (OR=1.4–4.7) as risk factors. When examined by sex, moderate level evidence of knee OA was found in men; however, the evidence in women was limited. Conclusions: Further high-quality prospective studies are warranted to provide further evidence on the role of occupational loading tasks in knee OA, particularly in women. PMID:24719516

  12. 30526 artificial lift

    SciTech Connect

    Not Available

    1989-01-01

    This book focuses on the four major methods of artificial lift: sucker-rod pumping, gas lift, electrical submersible pumping (ESP) and hydraulic pumping. Though more than 80% of artificially lifted wells worldwide are rod-pumped, the large majority of these wells are low-volume, stripper-type producers. For this reason, sucker-rod pumping papers comprise less than 40% of the 26 SPE papers selected.

  13. Occupational Clusters.

    ERIC Educational Resources Information Center

    Pottawattamie County School System, Council Bluffs, IA.

    The 15 occupational clusters (transportation, fine arts and humanities, communications and media, personal service occupations, construction, hospitality and recreation, health occupations, marine science occupations, consumer and homemaking-related occupations, agribusiness and natural resources, environment, public service, business and office…

  14. Lifting BLS Power Supplies

    SciTech Connect

    Sarychev, Michael

    2007-08-01

    This note describes BLS power supplies lifting techniques and provides stress calculations for lifting plate and handles bolts. BLS power supply weight is about 120 Lbs, with the center of gravity shifted toward the right front side. A lifting plate is used to attach a power supply to a crane or a hoist. Stress calculations show that safety factors for lifting plate are 12.9 (vs. 5 required) for ultimate stress and 5.7 (vs. 3 required) for yield stress. Safety factor for shackle bolt thread shear load is 37, and safety factor for bolts that attach handles is 12.8.

  15. Critical survey on the biomechanical criterion in the NIOSH method for the design and evaluation of manual lifting tasks

    Microsoft Academic Search

    Matthias Jäger; Alwin Luttmann

    1999-01-01

    In 1981, the National Institute for Occupational Safety and Health (NIOSH) published a comprehensive guide for the evaluation and design of manual lifting, based on epidemiological, physiological, psychophysical, and biomechanical knowledge. A revised version of the easy-to-use “NIOSH lifting equation” was provided in 1991 considering occasional new findings from literature. For assessing the load on the lumbar spine during lifting,

  16. Does the asymmetry multiplier in the 1991 NIOSH lifting equation adequately control the biomechanical loading of the spine?

    Microsoft Academic Search

    S. A. Lavender; Y. C. Li; R. N. Natarajan; G. B. J. Andersson

    2009-01-01

    The aim of this research was to evaluate whether the asymmetry multiplier incorporated in the 1991 National Institute for Occupational Safety and Health lifting equation adequately controls the biomechanical spine loads during asymmetric lifting. Sixteen male subjects lifted a box from four initial locations varying in terms of the angular deviation from the mid-sagittal plane (0, 30, 60 and 90°).

  17. Feasibility study of modern airships, phase 1. Volume 2: Parametric analysis (task 3). [lift, weight (mass)

    NASA Technical Reports Server (NTRS)

    Lancaster, J. W.

    1975-01-01

    Various types of lighter-than-air vehicles from fully buoyant to semibuoyant hybrids were examined. Geometries were optimized for gross lifting capabilities for ellipsoidal airships, modified delta planform lifting bodies, and a short-haul, heavy-lift vehicle concept. It is indicated that: (1) neutrally buoyant airships employing a conservative update of materials and propulsion technology provide significant improvements in productivity; (2) propulsive lift for VTOL and aerodynamic lift for cruise significantly improve the productivity of low to medium gross weight ellipsoidal airships; and (3) the short-haul, heavy-lift vehicle, consisting of a simple combination of an ellipsoidal airship hull and existing helicopter componentry, provides significant potential for low-cost, near-term applications for ultra-heavy lift missions.

  18. Lifting a Lion

    NSDL National Science Digital Library

    Texas Instruments

    2012-08-03

    "Students will work in groups to solve a real-world problem presented by the book: How Do You Lift A Lion? Using a toy lion and a lever, students will discover how much work is needed to raise the toy lion. They will use proportions to determine the force needed to lift a real lion" from TI World Math.

  19. Understanding Wing Lift

    ERIC Educational Resources Information Center

    Silva, J.; Soares, A. A.

    2010-01-01

    The conventional explanation of aerodynamic lift based on Bernoulli's equation is one of the most common mistakes in presentations to school students and is found in children's science books. The fallacies in this explanation together with an alternative explanation for aerofoil lift have already been presented in an excellent article by Babinsky…

  20. Catwalk grate lifting tool

    DOEpatents

    Gunter, L.W.

    1992-08-11

    A device is described for lifting catwalk grates comprising an elongated bent member with a handle at one end and a pair of notched braces and a hook at the opposite end that act in conjunction with each other to lock onto the grate and give mechanical advantage in lifting the grate. 10 figs.

  1. Gas lift system

    Microsoft Academic Search

    Bobo

    1987-01-01

    A gas lift method for lifting fluid from a borehole to the surface is described comprising the steps of: mixing at the surface a pressurized injection gas with a pressurized injection liquid without any foaming substance to form a gas-liquid pressurized non-foam mixture at a predetermined pressure less than the pressure at the bottom of the borehole, introducing the pressurized

  2. Random lifts of graphs

    Microsoft Academic Search

    Alon Amit; Nathan Linial; Ji?í Matoušek; Eyal Rozenman

    2001-01-01

    We describe here a simple probabilistic model for graphs that are lifts of a fixed base graph G, i.e., those graphs from which there is a covering man onto G. Our aim is to investigate the properties of typical graphs in this class. In particular, we show that almost every lift of G is ?(G)-connected where ?(G) is the minimal

  3. Propulsive lift noise

    NASA Astrophysics Data System (ADS)

    Fink, Martin R.

    1991-08-01

    Propulsive life noise is the increase in noise that occurs when airframe surfaces are placed in the propulsive system's exhaust to increase their lift force. Increased local flow velocities and turbulence levels, due to the propulsive system exhaust gases passing along the airframe lifting surfaces, cause an increase in maximum lift coefficient. The airplane's flight speed required for takeoff and landing can then be significantly reduced, allowing operation from shorter runways than those of conventional commercial airports. Unfortunately, interaction of high velocity turbulent exhaust flow with the airframe's solid surfaces generates additional noise radiation. Aeroacoustic processes that cause propulsive lift noise also are present in airframe noise and propulsive system installation noise. Research studies of propulsive lift noise led to development of improved methods of predicting noise radiation from surfaces in turbulent flows. Noise reduction and prediction methods of aircraft noise are discussed.

  4. Aerodynamic Lifting Force.

    ERIC Educational Resources Information Center

    Weltner, Klaus

    1990-01-01

    Describes some experiments showing both qualitatively and quantitatively that aerodynamic lift is a reaction force. Demonstrates reaction forces caused by the acceleration of an airstream and the deflection of an airstream. Provides pictures of demonstration apparatus and mathematical expressions. (YP)

  5. FREIGHT CONTAINER LIFTING STANDARD

    SciTech Connect

    POWERS DJ; SCOTT MA; MACKEY TC

    2010-01-13

    This standard details the correct methods of lifting and handling Series 1 freight containers following ISO-3874 and ISO-1496. The changes within RPP-40736 will allow better reading comprehension, as well as correcting editorial errors.

  6. Analysis of Manual Lifting Tasks: A Qualitative Alternative to the NIOSH Work Practices Guide

    Microsoft Academic Search

    W. MONROE KEYSERLING

    1989-01-01

    A new method for evaluating ergonomic stresses on lifting tasks has been developed. This method utilizes the general procedures and hazard classification categories described in the National Institute for Occupational Safety and Health's (NIOSH) Work Practices Guide for Manual Lifting. The quantitative measurements of workplace dimensions and computations used by the NIOSH method to classify a job as “acceptable,” “administrative

  7. Theory of lifting surfaces

    NASA Technical Reports Server (NTRS)

    Prandtl , L

    1920-01-01

    The general basis of the theory of lifting surfaces is discussed. The problem of the flow of a fluid about a lifting surface of infinite span is examined in terms of the existence of vortexes in the current. A general theory of permanent flow is discussed. Formulas for determining the influence of aspect ratio that may be applied to all wings, whatever their plane form, are given.

  8. BIOMECHANICAL SIMULATION OF HUMAN LIFTING

    Microsoft Academic Search

    COLOBERT B. MULTON

    The aim of this paper is to simulate several levels of lifting strategies from parameters depending on the subject's centre of mass movements. Usually, symmetrical lifting strategies were categorized in two major solutions (Chaffin and Andersson, 1991): the squat lift that mainly involves a knee flexion and the back lift that mainly involves hip flexions. In the literature two main

  9. High-rate artificial lift

    SciTech Connect

    Clegg, J.D.

    1988-03-01

    This paper summarizes the major considerations in the selection, design, installation, operation, or repair of high-rate artificial-lift systems. The major types of artificial lift - sucker-rod pumps, gas-lift systems, electrical submersible pumps, hydraulic pumps and jets, and hydraulic turbine-driven pumps - will be discussed. An extensive bibliography of artificial-lift papers is included.

  10. Human exposure to heavy metals. Rare earth pneumoconiosis in occupational workers. [From Carbon arc lamps in photoengraving

    SciTech Connect

    Vocaturo, G.; Colombo, F.; Zanoni, M.; Rodi, F.; Sabbioni, E.; Pietra, R.

    1983-05-01

    A male subject exposed for many years to rare earth (RE)-containing fumes and dusts emitted from carbon arc lamps in photoengraving laboratories was investigated to rule out RE pneumoconiosis. While chest x-ray films showed a severe pulmonary fibrosis, clinical analysis showed obvious high RE concentrations in the pulmonary and lymph node biopsy specimens compared with the corresponding tissues of 11 unexposed subjects. In addition to other elements, levels of thorium (Th), which is generally present as an impurity of RE compounds, were also determined to estimate the radiation dose which may be involved in inducing pneumoconiosis. The results show that the levels of Th are more than two orders of magnitude lower than the maximum permissible concentration for occupational exposure to natural 232Th, suggesting that the long-term accumulation of RE in the lungs played a role in the pathogenesis of the observed pulmonary fibrosis of the worker.

  11. Subperiosteal midface-lift.

    PubMed

    Patrocinio, Lucas G; Patrocinio, Tomas G; Patrocinio, Jose A

    2013-06-01

    The subperiosteal midface-lift has benefited from significant technological advances in medicine. The endoscope now allows extensive subperiosteal undermining of facial soft tissue through minimal access incisions. Improved understanding of facial anatomy and the facial aging process now allow repositioning and remodeling of the soft tissue envelope with excellent aesthetic results. The subperiosteal midface-lift by a temporal approach is a procedure designed to rejuvenate the middle third of the face. After subperiosteal detachment, the soft tissues of the cheek, jowls, lateral canthus, and inferior orbital rim can be lifted to reestablish their youthful relationship with the underlying skeleton. It is a technique that produces satisfactory cosmetic results in most cases, causing malar augmentation, nasolabial fold improvement, and mild jowl improvement. We describe our preferred technique in detail and discuss its indications, complications, advantages, and limitations. PMID:23761124

  12. Musculoskeletal disorders and occupational exposures: how should we judge the evidence concerning the causal association?

    PubMed

    Punnett, Laura

    2014-03-01

    Musculoskeletal disorders (MSDs) affecting the back, upper and lower extremities are widespread in the general population, implying a variety of causal factors. Multiple causes are not mutually exclusive, and a high background rate does not preclude associations with specific factors that are uncommon in the general population. MSDs have well-documented associations with occupational ergonomic stressors such as repetitive motion, heavy lifting, non-neutral postures, and vibration. Organizational features of the work environment, such as time pressure and low decision latitude, may also play a role, at least by potentiating the effects of physical loading. Numerous systematic reviews have mostly concurred with these overall findings. Nevertheless, some continue to debate whether MSDs are sometimes work-related, even for those performing jobs with repetitive and routinized tasks, heavy lifting, and/or pronounced postural strain. This article discusses (1) some epidemiologic features of MSDs that underlie that debate; and (2) the question of what should appropriately be considered a gold standard for scientific evidence on an etiological question such as the health effects of a non-voluntary exposure, such as an occupational or environmental agent. In particular, randomized clinical trials have little relevance for determining the health effects of non-therapeutic risk factors. PMID:24553854

  13. Dynamic Lift of Airfoils

    Microsoft Academic Search

    Stephan Barth

    2005-01-01

    We present initial wind tunnel measurements which investigate the dynamic stall effect as it is caused by fluctuations of the wind direction in turbulent wind. In order to quantify this effect, the lift of an FX79-W-151A airfoil is determined by the integral of pressure distribution at the wind tunnel walls while rotating the airfoil with defined angular velocity. The rotation

  14. Drag and lift

    NSDL National Science Digital Library

    Cislunar Aerospace

    1997-01-01

    This activity introduces students to the aerodynamic basics of lift and drag. The materials needed are pieces of cardboard 20 x 30 inches and other size cardboard pieces. This would be a suitable activity for small groups. Copyright 2005 International Technology Education Association

  15. The volumetric face lift

    Microsoft Academic Search

    Richard Ellenbogen; Anthony Youn; Dan Yamini; Steven Svehlak

    2004-01-01

    BackgroundMany face lift techniques that manipulate the superficial musculoaponeurotic system (SMAS) in order to correct a perceived descent of deeper facial structures have been presented. However, such procedures can result in insufficient volume restoration, which may be correctable only by actual fat replacement.

  16. Male face lift

    Microsoft Academic Search

    Bruce F. Connell; Santa Ana

    2002-01-01

    The author describes how to use the deep layer support technique for male face lift to achieve natural-looking results and virtually undetectable scars. He discusses incisions and neck contouring in detail and provides pointers on eliminating crow's-feet. (Aesthetic Surg J 2002;22:385-396.)

  17. Hydraulic lifting device

    NASA Technical Reports Server (NTRS)

    Terrell, Kyle (inventor)

    1990-01-01

    A piston and cylinder assembly is disclosed which is constructed of polyvinyl chloride that uses local water pressure to perform small lifting tasks. The chamber is either pressurized to extend the piston or depressurized to retract the piston. The present invention is best utilized for raising and lowering toilet seats.

  18. Kaizen: ergonomics approach to occupational health and safety.

    PubMed

    Kumashiro, Masaharu

    2011-12-01

    Kaizen (work improvement) is the forte of Japanese industry. Kaizen activities were born in the early 20th century under the name efficiency research. These activities were the beginning of industrial engineering (IE). Later on people began to rethink the single-minded devotion to improving productivity. Then the job re-design concept was developed. The main target of kaizen in the area of occupational health and safety in Japanese manufacturing is the improvement of inadequate working posture followed by the improvement of work for transporting and lifting heavy objects. Unfortunately, the kaizen activities undertaken by most Japanese companies are still focused on improving productivity and quality. The know-how for promoting kaizen activities that integrate the three aspects of IE, occupational health, and ergonomics is not being accumulated, however. In particular, the IE techniques should be incorporated into kaizen activities aimed at occupational safety and health, and the quantitative assessment of workload is required. In addition, it is important for on-the-job kaizen training in the ERGOMA Approach for production supervisors, who are the main advocates of IE kaizen. PMID:25665221

  19. Single and dual lift analyses of offshore structures

    SciTech Connect

    Sekita, K.; Kimura, H.

    1984-02-01

    At offshore job sites today, decks are lifted onto jacket structures in relatively large, heavy sections. Since lifting operations are greatly affected by the motions of the derrick barge or the crane ship, it is necessary to evaluate the sling system in consideration of vessel motions in order to regulate lifting operations at the job site. This paper proposes a static analysis method for designing sling systems and describes the application of this method to dual-lift operations carried out by two derrick crane barges in Southeast Asian waters. This paper also presents the methods of analyzing the motions of a hoisted load caused by wave-induced vessel motions and resulting dynamic sling tensions in single- and dual-lift operations. Single-lift, unified analysis -- a method that considers the interaction between the barge and the hoisted load -- is discussed, and calculated results are compared with 1/75-scale model test results to clarify the conditions necessary for unified analysis. Finally, the results of transient motion analysis for a barge crawling while lifting a load are compared with model test results.

  20. Vertical neck lifting.

    PubMed

    Jacono, Andrew A; Talei, Benjamin

    2014-05-01

    The authors' vertical neck lifting procedure is an extended deep plane facelift, which elevates the skin and SMAS-platysma complex as a composite unit. The goal is to redrape cervicomental laxity vertically onto the face rather than laterally and postauricularly. The authors consider this an extended technique because it lengthens the deep plane flap from the angle of the mandible into the neck to release the cervical retaining ligaments that limit platysmal redraping. This technique does not routinely use midline platysmal surgery because it counteracts the extent of vertical redraping. A majority of aging face patients are good candidates for this procedure in isolation, but indications for combining vertical neck lifting with submental surgery are elucidated. PMID:24745389

  1. [Subperiosteal face-lift].

    PubMed

    Tessier, P

    1989-01-01

    The "facial mask" is composed of all of the tissues lying on top of the skeleton: periosteum, deep adipose tissue, superficial musculo-aponeurotic tissue and skin. The periosteum is the intermediate zone between the skeleton, responsible for the shape of the face, and the more superficial tissues which complete the shapes and, most importantly, represent the mobile part of the face and consequently the site of facial expression. The secret of an effective "mask-lift" depends on complete subperiosteal dissection of the malar bones, zygomatic arches and orbital margins. This dissection can be performed via a coronal approach, but it is easier to start the subperiosteal dissection via a short vestibular incision. Subperiosteal dissection via a coronal incision is not only useful to lift the facial mask; it is also useful for remodelling the orbital margins and to obtain bone grafts from the parietal area in order to reinforce the glabella, check bones and nasogenial folds. PMID:2473674

  2. Powered-lift aircraft technology

    NASA Technical Reports Server (NTRS)

    Deckert, W. H.; Franklin, J. A.

    1989-01-01

    Powered lift aircraft have the ability to vary the magnitude and direction of the force produced by the propulsion system so as to control the overall lift and streamwise force components of the aircraft, with the objective of enabling the aircraft to operate from minimum sized terminal sites. Power lift technology has contributed to the development of the jet lift Harrier and to the forth coming operational V-22 Tilt Rotor and the C-17 military transport. This technology will soon be expanded to include supersonic fighters with short takeoff and vertical landing capability, and will continue to be used for the development of short- and vertical-takeoff and landing transport. An overview of this field of aeronautical technology is provided for several types of powered lift aircraft. It focuses on the description of various powered lift concepts and their operational capability. Aspects of aerodynamics and flight controls pertinent to powered lift are also discussed.

  3. Enhanced Rescue Lift Capability

    NASA Technical Reports Server (NTRS)

    Young, Larry A.

    2007-01-01

    The evolving and ever-increasing demands of emergency response and disaster relief support provided by rotorcraft dictate, among other things, the development of enhanced rescue lift capability for these platforms. This preliminary analysis is first-order in nature but provides considerable insight into some of the challenges inherent in trying to effect rescue using a unique form of robotic rescue device deployed and operated from rotary-wing aerial platforms.

  4. Dynamic Lifting by Whole Body Motion of Humanoid Robots Hitoshi Arisumi, Sylvain Miossec, Jean-Rmy Chardonnet, and Kazuhito Yokoi, Member, IEEE

    E-print Network

    Paris-Sud XI, Université de

    Dynamic Lifting by Whole Body Motion of Humanoid Robots Hitoshi Arisumi, Sylvain Miossec, Jean to a higher position with humanoid robots is developed. The key issue of lifting motion is how to reduce realize a motion of lifting a heavy object dynamically with the humanoid robot HRP-2 through experiment

  5. [Endoscopic brow lift].

    PubMed

    Romo, T; Abraham, M T; Azzi, J-P

    2012-10-01

    Endoscopic surgical techniques have greatly increased in popularity with the advent of modern endoscopes. Endoscopic brow lifting has largely replaced older, more invasive procedures. With this technique a skilled surgeon can identify and treat a ptotic eyebrow by addressing the relevant anatomy, including the frontalis, corrugator, procerus and orbicularis oculi muscles. The frontalis muscle can then be permanently fixed into a predesignated position using titanium screws and permanent sutures. This approach has allowed facial plastic surgeons to address the ptotic brow with decreased rates of edema, hematoma, hypesthesia, alopecia and scarring. PMID:23052234

  6. Chair Lift Challenge

    NSDL National Science Digital Library

    2014-05-22

    In this activity, learners explore the unique challenges in transportation engineering, such as devising a method for skiers or hikers to get to the top of a mountain. Students work in teams to design a chair lift made out of everyday materials that can carry a tennis ball up a rope line and back down in a controlled manner so that the ball does not fall out of the cup. They sketch their plans, consider material selection, build their system, test it, reflect on the challenge, and present their experiences to their class.

  7. Occupational Myths

    E-print Network

    Ritzer, George

    1971-04-01

    myths at points of occupational stress and the myths are used by workers to cope with the stress. Six broad occupational types are discussed in this paper: pro fessions, semi-professions, managers, white collar clerical workers, low status employees... of the occupation to cope with the stressful situation. In the following discussion, six broad oc cupational types are considered: the professions, semi-professions, managers, white collar clerical workers, low status employees, and deviant occupations. For each...

  8. Occupational Employment

    ERIC Educational Resources Information Center

    Occupational Outlook Quarterly, 2010

    2010-01-01

    When choosing a career, jobseekers often want to know which occupations offer the best prospects. Generally, occupations that have rapid job growth, many new jobs, or many job openings--and good wages--promise better opportunities. This article shows how employment in particular occupations is projected to change over the 2008-2018 decade. The…

  9. Occupational Employment

    ERIC Educational Resources Information Center

    Occupational Outlook Quarterly, 2012

    2012-01-01

    When choosing a career, jobseekers often want to know which occupations offer the best prospects. Generally, occupations that have rapid job growth, many new jobs, or many job openings--and good wages--promise better opportunities. This paper shows how employment in particular occupations is projected to change from 2010 to 2020. It presents…

  10. Endoscopic brow lifts: have they replaced coronal lifts?

    PubMed

    Javidnia, Hedyeh; Sykes, Jonathan

    2013-05-01

    This article describes the use of the endoscopic brow-lifting technique in addressing periorbital aging. This article discusses the advantages and disadvantage of the endoscopic versus traditional techniques of brow lifting and gives our treatment algorithm depending on patient needs. PMID:23731581

  11. Comparison of measured and calculated aircraft lift generated pressures

    NASA Technical Reports Server (NTRS)

    Findley, D. S.

    1975-01-01

    Lift generated pressures produced by large, heavy aircraft at low altitudes were investigated due to concern over their possible effects on ground objects. Aircraft lift generated pressures were calculated using elementary airfoil theory, and these values were compared with ground level measurements made during an overflight program. The predicted and the measured values were in relatively good agreement. Due to lack of experimental investigations of this phenomenon, opportunity was taken during an overflight program to use a specially instrumented test range to measure the ground pressures produced for a range of aircraft weights and distances.

  12. Shape memory alloy resetable spring lift for pedestrian protection

    NASA Astrophysics Data System (ADS)

    Barnes, Brian M.; Brei, Diann E.; Luntz, Jonathan E.; Strom, Kenneth; Browne, Alan L.; Johnson, Nancy

    2008-03-01

    Pedestrian protection has become an increasingly important aspect of automotive safety with new regulations taking effect around the world. Because it is increasingly difficult to meet these new regulations with traditional passive approaches, active lifts are being explored that increase the "crush zone" between the hood and rigid under-hood components as a means of mitigating the consequences of an impact with a non-occupant. Active lifts, however, are technically challenging because of the simultaneously high forces, stroke and quick timing resulting in most of the current devices being single use. This paper introduces the SMArt (Shape Memory Alloy ReseTable) Spring Lift, an automatically resetable and fully reusable device, which couples conventional standard compression springs to store the energy required for a hood lift, with Shape Memory Alloys actuators to achieve both an ultra high speed release of the spring and automatic reset of the system for multiple uses. Each of the four SMArt Device subsystems, lift, release, lower and reset/dissipate, are individually described. Two identical complete prototypes were fabricated and mounted at the rear corners of the hood, incorporated within a full-scale vehicle testbed at the SMARTT (Smart Material Advanced Research and Technology Transfer) lab at University of Michigan. Full operational cycle testing of a stationary vehicle in a laboratory setting confirms the ultrafast latch release, controlled lift profile, gravity lower to reposition the hood, and spring recompression via the ratchet engine successfully rearming the device for repeat cycles. While this is only a laboratory demonstration and extensive testing and development would be required for transition to a fielded product, this study does indicate that the SMArt Lift has promise as an alternative approach to pedestrian protection.

  13. Lift enhancing tabs for airfoils

    NASA Technical Reports Server (NTRS)

    Ross, James C. (inventor)

    1994-01-01

    A tab deployable from the trailing edge of a main airfoil element forces flow onto a following airfoil element, such as a flap, to keep the flow attached and thus enhance lift. For aircraft wings with high lift systems that include leading edge slats, the slats may also be provided with tabs to turn the flow onto the following main element.

  14. Lifting Loads With Two Helicopters

    NASA Technical Reports Server (NTRS)

    Cicolani, L. S.; Kanning, G.

    1992-01-01

    Report discusses theoretical equilibrium characteristics of dual-helicopter lifting system. Analysis presented provides mathematical basis for selection of lifting configurations and flight parameters. Force-balance equations serve as basis for coordination in flight. Employed in both military and civilian sectors to deliver weapons, vehicles, and construction materials.

  15. Development of Nonpowered Lift for Wheelchair Users

    NASA Astrophysics Data System (ADS)

    Kobayashi, Yusuke; Seki, Hiroaki; Kamiya, Yoshitsugu; Hikizu, Masatoshi; Maekawa, Mitsuyoshi

    Wheelchair users need lifts to climb up/down steps at entrances with limited space. Lifts driven by motors or hydraulic equipment are large and expensive. They also need switches to start/stop actuators. The aim of our study is to develop a compact nonpowered lift for wheelchair users. We propose a lift driven by the wheels of a wheelchair on it. Coil springs are installed in the lift to decrease driving torque and some mechanisms are attached to the lift so that the small front casters of a wheelchair can cross the lift stage and the large rear wheels can drive the lift. After the lifting speed, driving force, and conditions for driving the rollers were analyzed and a prototype lift was designed and fabricated. The developed lift succeeded in raising a wheelchair with a user, and a continuous motion of a wheelchair from entering to exiting the stage was executed smoothly.

  16. The Fast Lifting Wavelet Transform

    NSDL National Science Digital Library

    Valens, C.

    A tutorial on wavelet filters aimed at engineers. Focusses on "lifting," a technique for creating a general framework to design filters for every possible wavelet transform. May be read online or downloaded in PostScript format.

  17. EXPERIMENTAL INVESTIGATION OF AIR LIFT PUMP

    Microsoft Academic Search

    A. A. Dare

    Air lift pump has been predominantly used for lifting of waste-water, aggressive fluid, transportation of solids and radioactive fluids in nuclear recycling plants and also for deep sea mining. The air lift pump performance depends on some fluid and geometric properties. Experiments were carried out by setting up a model air lift pump to unearth some of these parameters and

  18. The Four Faces of Lifting for the

    E-print Network

    Silverman, Joseph H.

    The Four Faces of Lifting for the Elliptic Curve Discrete Logarithm Problem Joseph H. Silverman), and indeed have running time O( p ). The Four Faces of Lifting for the ECDLP ­ 1­ #12;The Elliptic Curve among the lifts, and then reduces modulo p.The Four Faces of Lifting for the ECDLP ­ 2­ #12;The Elliptic

  19. Lift on a bent, flat plate

    NASA Technical Reports Server (NTRS)

    Keune, Friedrich

    1955-01-01

    The lift on a bent, flat plate is calculated exactly by the use of conformal mapping. Results are presented in terms permitting direct determination of the angle of zero lift, the lift coefficient, and the lift-curve slope for any flap-chord ratio, flap-deflection angle, and angle of attack.

  20. Lift enhancement in flying snakes

    NASA Astrophysics Data System (ADS)

    Krishnan, Anush; Socha, John; Vlachos, Pavlos; Barba, Lorena

    2013-11-01

    Flying snakes use a unique method of aerial locomotion: they jump from tree branches, flatten their bodies and undulate through the air to produce a glide. The shape of their body cross-section during the glide plays an important role in generating lift. We present a computational investigation of the aerodynamics of the cross-sectional shape. We performed two-dimensional simulations of incompressible flow past the anatomically correct cross-section of the species Chrysopelea paradisi, which show that a significant enhancement in lift appears at an angle of attack of 35 degrees, for Reynolds numbers 2000 and above. Previous experiments on physical models also demonstrated an increased lift and at the same angle of attack. The simulations point to the lift enhancement arising from the early separation of the boundary layer on the dorsal surface of the snake profile, without stall. The separated shear layer rolls up and interacts with secondary vorticity in the near-wake, inducing the primary vortex to remain closer to the body and thus cause enhanced suction, resulting in higher lift. In physical experiments, the flow is inherently 3-D due to fluid instabilities, and it is intriguing that the enhanced lift also appears in the two-dimensional simulations.

  1. Occupational Asthma

    PubMed Central

    Sheppard, Dean

    1982-01-01

    Bronchospasm is a common cause of morbidity in the workplace. More than 100 agents are now recognized as occupational causes of asthma and numerous agents can cause exacerbations of preexisting asthma. Because of the large number of potential causative agents and the complexity of modern industrial processes, knowledge of the characteristic clinical features of occupational asthma is the key to recognizing this disease. Early diagnosis of occupational asthma is important in preventing long-term morbidity. Present evidence that prolonged exposure to some work-encountered agents can cause asthma that persists for years after the end of exposure suggests that avoidance is the only acceptable countermeasure against this disease. PMID:7164429

  2. Occupational diseases in Korea.

    PubMed

    Kang, Seong-Kyu; Kim, Eun A

    2010-12-01

    Korea has industrialized since the 1970s. Pneumoconiosis in coal miners was the most common occupational disease in the 1970s to 1980s. With the industrialization, the use of many chemicals have increased since the 1970s. As a consequence, there were outbreaks of occupational diseases caused by poisonous chemicals, such as heavy metal poisoning, solvent poisoning and occupational asthma in the late 1980s and early 1990s with civil movement for democracy. Many actions have been taken for prevention by the government, employers and employees or unions. In the 1990s most chemical related diseases and pneumoconiosis have rapidly decreased due to improving work environment. In the late 1990s, cerebro-cardiovascular diseases related to job stress or work overloads have abruptly increased especially after the economic crisis in 1998. After the year 2000, musculoskeletal disorders became a major problem especially in assembly lines in the manufacturing industry and they were expanded to the service industry. Mental diseases related to job stress have increased. Infectious diseases increased in health care workers and afforestation workers. Occupational cancers are increasing because of their long latency, although the use of carcinogenic substances are reduced, limited, and even banned. PMID:21258589

  3. Occupational Diseases in Korea

    PubMed Central

    Kim, Eun A

    2010-01-01

    Korea has industrialized since the 1970s. Pneumoconiosis in coal miners was the most common occupational disease in the 1970s to 1980s. With the industrialization, the use of many chemicals have increased since the 1970s. As a consequence, there were outbreaks of occupational diseases caused by poisonous chemicals, such as heavy metal poisoning, solvent poisoning and occupational asthma in the late 1980s and early 1990s with civil movement for democracy. Many actions have been taken for prevention by the government, employers and employees or unions. In the 1990s most chemical related diseases and pneumoconiosis have rapidly decreased due to improving work environment. In the late 1990s, cerebro-cardiovascular diseases related to job stress or work overloads have abruptly increased especially after the economic crisis in 1998. After the year 2000, musculoskeletal disorders became a major problem especially in assembly lines in the manufacturing industry and they were expanded to the service industry. Mental diseases related to job stress have increased. Infectious diseases increased in health care workers and afforestation workers. Occupational cancers are increasing because of their long latency, although the use of carcinogenic substances are reduced, limited, and even banned. PMID:21258589

  4. Normalized Lift: An Energy Interpretation of the Lift Coefficient Simplifies Comparisons of the Lifting Ability of Rotating and Flapping Surfaces

    PubMed Central

    Burgers, Phillip; Alexander, David E.

    2012-01-01

    For a century, researchers have used the standard lift coefficient CL to evaluate the lift, L, generated by fixed wings over an area S against dynamic pressure, ½?v2, where v is the effective velocity of the wing. Because the lift coefficient was developed initially for fixed wings in steady flow, its application to other lifting systems requires either simplifying assumptions or complex adjustments as is the case for flapping wings and rotating cylinders. This paper interprets the standard lift coefficient of a fixed wing slightly differently, as the work exerted by the wing on the surrounding flow field (L/?·S), compared against the total kinetic energy required for generating said lift, ½v2. This reinterpreted coefficient, the normalized lift, is derived from the work-energy theorem and compares the lifting capabilities of dissimilar lift systems on a similar energy footing. The normalized lift is the same as the standard lift coefficient for fixed wings, but differs for wings with more complex motions; it also accounts for such complex motions explicitly and without complex modifications or adjustments. We compare the normalized lift with the previously-reported values of lift coefficient for a rotating cylinder in Magnus effect, a bat during hovering and forward flight, and a hovering dipteran. The maximum standard lift coefficient for a fixed wing without flaps in steady flow is around 1.5, yet for a rotating cylinder it may exceed 9.0, a value that implies that a rotating cylinder generates nearly 6 times the maximum lift of a wing. The maximum normalized lift for a rotating cylinder is 1.5. We suggest that the normalized lift can be used to evaluate propellers, rotors, flapping wings of animals and micro air vehicles, and underwater thrust-generating fins in the same way the lift coefficient is currently used to evaluate fixed wings. PMID:22629326

  5. Occupational Health

    MedlinePLUS

    Occupational health problems occur at work or because of the kind of work you do. These problems can include ... by exposure to radiation Exposure to germs in health care settings Good job safety and prevention practices ...

  6. Occupational Therapists

    MedlinePLUS

    ... patients’ schedules. <- How to Become One Job Outlook -> Job Outlook About this section Occupational Therapists Percent change ... will need to cover once reforms are implemented. Job Prospects Job opportunities should be good for licensed ...

  7. Occupational asthma.

    PubMed

    Brooks, S M

    1995-12-01

    Occupational asthma is an important occupational respiratory disorder, both in terms of morbidity, disability and in the total number of cases. The two types of occupational asthma are classified on the basis of their temporal relationship to onset. Occupational asthma with latency reflects allergic occupational asthma and is a condition characterized by a preceding latent period of workplace exposure during which allergic sensitization to a material present at the work site occurs. It is characterized biochemically by immunologic alterations and physiologically by variable and work-related airflow limitation with the presence of both specific and nonspecific airway hyperresponsiveness. In contrast, occupational asthma without latency is an asthmatic condition that develops suddenly and without a preceding latent period, as epitomized by the reactive airways dysfunction syndrome (RADS). RADS is distinguished physiologically by chronic, persistent nonspecific airway hyperresponsiveness and usually occurs after a single brief high-level exposure to an irritant gas, vapor of fume; new information suggests that a more prolonged irritant exposure, in certain susceptible persons with a pre-existing allergic predisposition, can also lead to the initiation of new-onset asthma. The factors that may be influential in the pathogenesis of occupational asthma include: exposure characteristics, industrial factors, job attributes, geographic and climatic conditions, economic considerations and personal or host conditions, such as atopy and cigarette smoking. Preventive measures and opportunities for intervention are essential and must address plans for reducing or eliminating accidents and spills, as well as plans for engineering control methods and proper and effective local exhaust ventilation. Medical surveillance programs are the keystone for prevention and should identify persons who are at an increased risk for developing occupational asthma, as well as detecting asthma at an early stage when intervention options are likely to be successful. For sensitized workers, the best preventive option is completed removal from the work environment. PMID:8597082

  8. Minimal incision face-lifting.

    PubMed

    Rousso, Daniel E; Brys, Agata K; Agata, Brys

    2012-02-01

    Rhytidectomy has been performed for over 100 years, but only more recently has it become generally accepted by society. Recent improvements in access to information has produced more public awareness of the possible aesthetic enhancements. Additionally, there has been a trend for the younger patient to seek cosmetic surgery, often requesting procedures with minimal incisions and less downtime. The mini-lift, with its decreased operating time and expense, rapid recovery, as well as more limited incisions and tissue elevation, is an ideal procedure for patients with a smaller degree of cheek and neck laxity. We describe our concept of the mini-lift and address what results can be expected. PMID:22418818

  9. Endoscopic brow lifts uber alles.

    PubMed

    Patel, Bhupendra C K

    2006-12-01

    Innumerable approaches to the ptotic brow and forehead have been described in the past. Over the last twenty-five years, we have used all these techniques in cosmetic and reconstructive patients. We have used the endoscopic brow lift technique since 1995. While no one technique is applicable to all patients, the endoscopic brow lift, with appropriate modifications for individual patients, can be used effectively for most patients with brow ptosis. We present the nuances of this technique and show several different fixation methods we have found useful. PMID:17182404

  10. Safe Lifting in Patients with Chronic Low Back Pain: Comparing FCE Lifting Task and Niosh Lifting Guideline

    Microsoft Academic Search

    Wietske Kuijer; Pieter U. Dijkstra; Sandra Brouwer; Michiel F. Reneman; Johan W. Groothoff; Jan H. B. Geertzen

    2006-01-01

    \\u000a Introduction: Both the floor-to-waist lifting task of the Isernhagen Work Systems Functional Capacity Evaluation (IWS FCE) and recommended weight limit (RWL) of the NIOSH produce safe lifting weights and are used world-wide nowadays. It is unknown whether they produce similar safe lifting weights. Aim of this study was to compare FCE performance on the floor-to-waist lifting task and RWL of

  11. Occupational Neurotoxic Diseases in Taiwan

    PubMed Central

    Liu, Chi-Hung; Huang, Chu-Yun

    2012-01-01

    Occupational neurotoxic diseases have become increasingly common in Taiwan due to industrialization. Over the past 40 years, Taiwan has transformed from an agricultural society to an industrial society. The most common neurotoxic diseases also changed from organophosphate poisoning to heavy metal intoxication, and then to organic solvent and semiconductor agent poisoning. The nervous system is particularly vulnerable to toxic agents because of its high metabolic rate. Neurological manifestations may be transient or permanent, and may range from cognitive dysfunction, cerebellar ataxia, Parkinsonism, sensorimotor neuropathy and autonomic dysfunction to neuromuscular junction disorders. This study attempts to provide a review of the major outbreaks of occupational neurotoxins from 1968 to 2012. A total of 16 occupational neurotoxins, including organophosphates, toxic gases, heavy metals, organic solvents, and other toxic chemicals, were reviewed. Peer-reviewed articles related to the electrophysiology, neuroimaging, treatment and long-term follow up of these neurotoxic diseases were also obtained. The heavy metals involved consisted of lead, manganese, organic tin, mercury, arsenic, and thallium. The organic solvents included n-hexane, toluene, mixed solvents and carbon disulfide. Toxic gases such as carbon monoxide, and hydrogen sulfide were also included, along with toxic chemicals including polychlorinated biphenyls, tetramethylammonium hydroxide, organophosphates, and dimethylamine borane. In addition we attempted to correlate these events to the timeline of industrial development in Taiwan. By researching this topic, the hope is that it may help other developing countries to improve industrial hygiene and promote occupational safety and health care during the process of industrialization. PMID:23251841

  12. Two-dimensional geometric lifting

    Microsoft Academic Search

    Joshua Blackburn; Minh N. Do

    2009-01-01

    Wavelets provide a sparse representation for piecewise smooth signals in 1-D; however, separable extensions of wavelets to multiple dimensions do not achieve the same level of sparseness. Recently proposed directional lifting offers transforms sensitive to edges that are not aligned with the coordinate axes, yet the concatenation of separate 1-D slices implicitly assumes independent directional slices and could create large

  13. Occupational therapist.

    PubMed

    Coad, C P

    1984-01-01

    The purpose of this paper is to demonstrate the application of the skills of the occupational therapist in a position as coordinator of a special vocational training program in a community college district. Duties described include program for limited-English-proficient adults. A major reason for a specialized educational approach for limited-English-speaking adults came from the large influx of non-native English speaking immigrants and refugees into the community college district, many of them without job skills. The resulting vocational linguistic program involves counseling, job-skill training and vocational English instruction. A summary of the procedures involved in evaluating language proficiency and vocational skills from enrollment to job-ready status is presented and explained. This role of the occupational therapist follows the trend to incorporate the generic skills of occupational therapy into new areas of practice. PMID:23952121

  14. New procedure for assessing sequential manual lifting jobs using the revised NIOSH lifting equation

    Microsoft Academic Search

    T. R. Waters; M.-L. Lu; E. Occhipinti

    2007-01-01

    A sequential manual lifting job is defined as a job where workers rotate between a series of manual lifting rotation slots or elements at specified time intervals during the course of a work shift. The original NIOSH lifting equation lacked a method for assessing the physical demands of these types of jobs. This paper presents the sequential lifting index (SLI),

  15. Qualitatively different modes of manual lifting

    Microsoft Academic Search

    Robin Burgess-Limerick; Bruce Abernethy

    1997-01-01

    The question of whether qualitatively different modes of manual lifting exist is addressed via an ideographic analysis of data from an experiment in which 39 subjects lifted loads of varying mass. Angular motion in the sagittal plane of ankle, knee, hip, and lumbar vertebral joints was estimated from video images collected while each subject performed 100 lifts. Bimodality in the

  16. Robust lifting wavelet transform for subimage extraction

    Microsoft Academic Search

    Shigeru Takano; Koichi Niijima

    2000-01-01

    We present a novel method to extract subimages from a huge reference image by using integer-type lifting wavelet transforms. Our integer to integer lifting wavelet transform contains controllable free parameters in the lifting term, which is constructed based on an integer version of Haar wavelet transform. Such free parameters are trained following a vanishing criterion for low frequency components of

  17. OCCUPATIONAL ENDORSEMENTS

    E-print Network

    Ickert-Bond, Steffi

    human services), then the credits you earn from each UA institution will be counted toward fulfillment residency requirements are the minimum number of credits you must earn from the campus where you earn occupational training in a specific field. These programs are 9 ­ 30 credit hours and will be posted

  18. OCCUPATIONAL ENDORSEMENTS

    E-print Network

    Ickert-Bond, Steffi

    human services), then the credits you earn from each UA institution will be counted toward fulfillment residency requirements are the minimum number of credits you must earn from the campus where you earn occupational training in a specific field. These programs are 9­29 credit hours and will be posted

  19. Numerous methods of lifting and lowering objects from the seabed have been developed throughout the history of ocean engineering and exploration.

    E-print Network

    Sóbester, András

    attachment Figure 2 The central part of the device is the cryogenic Dewar and gasification system the history of ocean engineering and exploration. Initially, these methods were in practice for the purpose of a lightweight cryogenic marine heavy lift buoyancy system. · The objective is to be able to lift or lower large

  20. Quiet powered-lift propulsion

    NASA Technical Reports Server (NTRS)

    1979-01-01

    Latest results of programs exploring new propulsion technology for powered-lift aircraft systems are presented. Topics discussed include results from the 'quiet clean short-haul experimental engine' program and progress reports on the 'quiet short-haul research aircraft' and 'tilt-rotor research aircraft' programs. In addition to these NASA programs, the Air Force AMST YC 14 and YC 15 programs were reviewed.

  1. Sensations of heaviness.

    PubMed

    Gandevia, S C; McCloskey, D I

    1977-06-01

    We have studied the appreciation of heaviness in two groups of subjects; in 8 patients with varying degrees of unilateral 'upper motor neuron' weakness but without sensory symptoms or signs, and in 10 volunteers during partial curarization of the forearm and hand. In all experiments the subjects matched a reference weight lifted on the weak side with a variable weight on the strong side to provide an objective indication of the heaviness of the reference weight. Patients matched the weights of tennis balls filled with mercury or weights lifted by extending the index finger. Weights were judged as heavier when lifted by the weakened side both in the hemiparetic patients and in normal subjects weakened with curare. In both the hemiparetic patients and the subjects weakened with curare peripheral sensory information would signal the forces exerted in lifting the weight; however, both groups of subjects clearly placed more reliance on the effort that was being put into the contraction than on peripheral tensions achieved. The concept that we rely in part on a sensing command to the motoneurons when estimating weight agrees with observations by Holmes on patients with unilateral cerebellar dysfunction, and with recent physiological experiments. PMID:884488

  2. Detail design of the MPU Heavy Lifter

    Microsoft Academic Search

    H. Ludescher; S. A. Haugerud; M. Fernández Ruiz

    This paper gives insight into detail design of the MPU Heavy Lifter. The innovative structure is developed for offshore heavy lifting operations like removing or installing platforms. Its hull is composed of highly reinforced and prestressed lightweight concrete forming slabs and walls with thicknesses between 0.3 m and 0.9 m. Information is provided on the design procedure, on the basis

  3. Endoscopically assisted biplanar forehead lift.

    PubMed

    Ramirez, O M

    1995-08-01

    The standard subgaleal coronal incision used for brow lifting is limited to patients with low foreheads. The subcutaneous hairline brow lift used for patients with high foreheads has a high rate of vascular complications. However, the main advantage of the subcutaneous approach is preservation of sensation posterior to the incision line. The subperiosteal approach, on the other hand, allows a better periorbital remodeling. I have combined the subperiosteal and the subcutaneous approach to take advantage of and minimize the disadvantages of each individual approach. The advent of the endoscopic technique has allowed more accurate and controlled periorbital dissection and brow depressor muscle modification. The operation is indicated in every patient in whom the anterior hairline incision is indicated. It is a good method for decreasing the height of the forehead. The dissection is done initially in the subcutaneous plane, and about halfway on the forehead slit incisions through the galea-periosteal layer and through the temporoparietal fascia are made to continue the dissection in the deep plane. The periosteal dissection and release at the arcus marginalis is done under endoscopic control. Likewise, the brow depressor muscle modification is done under endoscopic magnification. Deep anchoring sutures fix the brow in the elevated position. Trimming and closure of the cutaneous layer are done with minimal tension. The biplanar subperiosteal-subcutaneous forehead lift has been used in 24 patients with very satisfactory results. Complications have been of a minor nature. Patients have maintained sensation posterior to the hairline incision. The height of the forehead has been decreased in every case. Frontalis muscle function has been preserved. PMID:7624404

  4. The anchor subperiosteal forehead lift.

    PubMed

    Ramirez, O M

    1995-05-01

    The coronal incision used for brow lift procedure has a high rate of localized alopecia, widening, and depression of the scar at the suture line. Other sequelae of the standard coronal brow lift incision procedure are "stretch-back" with a recurrent brow ptosis, poor brow elevation, and numbness beyond the incision line. Factors causing alopecia are tension, use of a monopolar cautery, use of key sutures with undue tension, one-layer closure, and sutures left too long. Recurrent brow ptosis may be due to anterior displacement of the posterior scalp flap, stretching of the anterior frontal skin flap, or insufficient power of the weakened frontalis muscle. Poor brow elevation may be due to unsatisfactory dissection on the glabella and orbital rims. Numbness and itching beyond the incision line are due to a low coronal incision. To avoid these problems, the following principles were followed: (1) If not contraindicated, the incision is made high on the vertex of the head, posterior to a biauricular line. (2) The pericranium is included in the frontal flap starting at the incision lines. (3) The subperiosteal dissection is continued down to the orbital rims and nasal bones. (4) The release of the periosteum at the arcus marginalis or just above allows repositioning of the brow structures. (5) The inelastic pericranium maintains the position of the elevated structures and avoids stretching of the frontal skin. (6) The integrity of the frontalis muscle is maintained completely. (7) Two large triangles of scalp resected in the posterior flaps allow fixing the position of the posterior scalp and match better the length of the anterior flap. (8) The galea periosteal rim flap allows anchoring of the frontal flap to the undersurface of the posterior scalp flap. This stabilizes the closure with minimal tension on the hair-bearing portion of the scalp. The wide surface of contact avoids depression and widening at the suture line. (9) Closure with skin staples avoids constriction of the hair follicles. (10) Hemostasis is done with a bipolar cautery. (11) No through-and-through key sutures are used. Some of these principles were introduced to the endoscopic subperiosteal forehead lift. The modifications mentioned above have been used in 92 open brow/face lift procedures with excellent aesthetic and functional results and minimal complications. PMID:7732147

  5. CAR Lift Request, Revised 03/14 CAR Lift Request Form

    E-print Network

    CAR Lift Request, Revised 03/14 CAR Lift Request Form Office of the University Controller to the University will create an accounts receivable hold (CAR) preventing access to grades, course registration

  6. Facial emphysema after sinus lift.

    PubMed

    Sakakibara, Akiko; Suzuki, Hiroaki; Yamashita, Atsuya; Hasegawa, Takumi; Minamikawa, Tsutomu; Furudoi, Shungo; Komori, Takahide

    2015-01-01

    An 80-year-old man with a history of en bloc resection of squamous cell carcinoma of the hard palate (T4aN0M0) was performed a lateral-window sinus lift of the edentulous area of the left maxillary molar region to facilitate future placement of dental implants.Two hours after the surgery, the patient complained of sudden malar swelling. Marked swelling was present from the left infraorbital region to the buccal region. The swelling was associated with air pockets at the alar base and in the angulus oculi medialis region and subcutaneous malar tissue. Emphysema appeared after the patient blew his nose. Therefore, the mucous membrane of the maxillary sinus might have had a small hole, and air might have entered the subcutaneous tissue via the bone window when the air pressure in the maxillary sinus increased with nose blowing. It is important to advise patients to avoid increasing the intraoral pressure after sinus-lift procedure. PMID:26088054

  7. Facial emphysema after sinus lift

    PubMed Central

    Sakakibara, Akiko; Suzuki, Hiroaki; Yamashita, Atsuya; Hasegawa, Takumi; Minamikawa, Tsutomu; Furudoi, Shungo; Komori, Takahide

    2015-01-01

    An 80-year-old man with a history of en bloc resection of squamous cell carcinoma of the hard palate (T4aN0M0) was performed a lateral-window sinus lift of the edentulous area of the left maxillary molar region to facilitate future placement of dental implants. Two hours after the surgery, the patient complained of sudden malar swelling. Marked swelling was present from the left infraorbital region to the buccal region. The swelling was associated with air pockets at the alar base and in the angulus oculi medialis region and subcutaneous malar tissue. Emphysema appeared after the patient blew his nose. Therefore, the mucous membrane of the maxillary sinus might have had a small hole, and air might have entered the subcutaneous tissue via the bone window when the air pressure in the maxillary sinus increased with nose blowing. It is important to advise patients to avoid increasing the intraoral pressure after sinus-lift procedure. PMID:26088054

  8. Stereotype lift in motor performance 1 Running head: STEREOTYPE LIFT IN MOTOR PERFORMANCE

    E-print Network

    Paris-Sud XI, Université de

    , published in "Basic and Applied Social Psychology 30 (2008) 18-26" #12;Stereotype lift in motor performanceStereotype lift in motor performance 1 Running head: STEREOTYPE LIFT IN MOTOR PERFORMANCE of Grenoble 1, France Jean-Claude Croizet University of Poitiers, France Basic and Applied Social Psychology

  9. The Selection of a Van Lift or a Scooter.

    ERIC Educational Resources Information Center

    Stevens, John H.

    1990-01-01

    This newsletter issue describes 3-wheeled scooters and van lifts that can assist a person with a disability to drive independently or have access to transportation. The section on van lifts compares hydraulic lifts and electric lifts, lists manufacturers, and offers an "assessment quiz" outlining factors to consider in selecting a van lift. In the…

  10. Occupational Classification System Manual

    NSDL National Science Digital Library

    Researchers may gain insight into the Bureau of Labor Statistics and Census Bureau occupational codes via the Occupational Classification System Manual (OCSM). A list of Major Occupation Group titles (MOGs) is provided as well as links to the Census Occupation Index--an alphabetical list of approximately 30,000 occupational titles. Further guidance in locating the proper occupation classification for research queries is outlined in the articles "Using the OCSM" and "Using the Census Index."

  11. OCCUPATIONAL STRESS IN THE SERVICE SECTOR: A NEW DIMENSION

    Microsoft Academic Search

    Zeenobiyah Hannif; Felicity Lamm; Karen Lo; Jeffrey Lu

    Previous research on occupational stress is limited in that it has tended to focus on the individual and is frequently located within occupations that are deemed to be stressful, such as nursing and policing. The intention of this paper is to broaden the scope of analysis by investigating a range of employment factors (i.e. heavy workloads, interpersonal relationships and organisational

  12. Training Guidelines: Fork Lift Truck Driving.

    ERIC Educational Resources Information Center

    Ceramics, Glass, and Mineral Products Industry Training Board, Harrow (England).

    This manual of operative training guidelines for fork lift truck driving has been developed by the Ceramics, Glass and Mineral Products Industry Training Board (Great Britain) in consultation with a number of firms which manufacture fork lift trucks or which already have training--programs for their use. The purpose of the guidelines is to assist…

  13. Principal component analysis of lifting waveforms

    Microsoft Academic Search

    Allan T. Wrigley; Wayne J. Albert; Kevin J. Deluzio; Joan M. Stevenson

    2006-01-01

    Background. One limiting factor in lifting research design has been the inability to effectively analyze waveform data, especially when differences in body mass, height, and load magnitude influence the derived kinetic variables. The purpose of this study was to demon- strate the sensitivity of principal component analysis to quantify clinically relevant differences in kinetic lifting waveforms over three load magnitudes

  14. Lift-off Processes with Photoresists

    E-print Network

    Yoo, S. J. Ben

    designed for lift-off attain a reproducible undercut. Such an undercut helps to prevent the resist of the resin of common negative resists maintains the undercut even at very high coating temperatures, which helps to maintain the undercut dur- ing coating. For stable lift-off processes in the µm and sub

  15. O.H. Module Vacuum Lifting Fixture

    Microsoft Academic Search

    Paul McGivern

    1987-01-01

    In order to move the 800 lb. copper plates that make up the O.H. modules a vacuum lifting device has been made that will lift the plates safely. The purpose of this report is to provide documentation for the structural integrity of the system and to make sure that it passes all of the safety requirements that have been established

  16. Extraction of Subimages by Lifting Wavelet Filters

    Microsoft Academic Search

    Shigeru TAKANO; Koichi NIIJIMA

    2000-01-01

    SUMMARY This paper proposes a method for extracting subimages from a huge reference image by learning lifting wavelet filters. Lifting wavelet filters are biorthogonal wavelet filters con- taining free parameters developed by Sweldens. Our method is to learn such free parameters using some training subimages so as to vanish their high frequency components in the y- and x- directions. The

  17. Improving Grading Consistency through Grade Lift Reporting

    ERIC Educational Resources Information Center

    Millet, Ido

    2010-01-01

    We define Grade Lift as the difference between average class grade and average cumulative class GPA. This metric provides an assessment of how lenient the grading was for a given course. In 2006, we started providing faculty members individualized Grade Lift reports reflecting their position relative to an anonymously plotted school-wide…

  18. Intermittent oil well gas-lift apparatus

    Microsoft Academic Search

    T. R. Maloney; D. E. Patterson; R. J. Aseltine

    1987-01-01

    An intermittent gas-lift apparatus for lifting liquids is described comprising: a production tube positioned within a casing wherein the casing has perforations adjacent a producing formation to provide a path of fluid communication between the formation and the interior of the casing; means for sealing the production tube within the casing above the perforations therein; a chamber connected to the

  19. View of West end of central lift span truss web ...

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

    View of West end of central lift span truss web of Tensaw River Bridge, showing web brace of lift girder superstructure, looking west - Tensaw River Lift Bridge, Spanning Tensaw River at U.S. Highway 90, Mobile, Mobile County, AL

  20. What's new in artificial lift

    SciTech Connect

    Lea, J.F.; Winker, H.W.

    1989-05-01

    New developments might be expected to decline as oil, and thus equipment and service, prices decrease. However, there is no indication that this is occurring. In fact, several new and innovative developments are covered in this article. Of the more unique are a new geometry pumping unit and a hydraulic powered sucker and rod system. Other items described in this article include: New pump-off controller; Automatic balancing for air balanced pumping units; New rod couplings; New pump plunger; Sucker rod pulsation dampener; Stripper type BOP; Rod coupling tool; ESP cable protectors; New ESP motor; VSD communications interface; ESP gas separator; Portable hydraulic production test unit; Casing gas lift plunger; Production shut-of valve; Ceramic material for pump parts; Pressure transmitter; and New versatile packer.

  1. Heavy lift crane/derrick barge stability analysis

    E-print Network

    Loesch, Robert Morrison

    1988-01-01

    Pretension Wind Condition 11 Tons 22 Tons 38 Tons Bo 3. 5 5. 2 B8 3. 0 7. 9 10. 4 Bll 4. 3 10. 4 12. 8 (Beau f ort Scale) Barge motion prediction calculations were made by X. J. Wu [12] and C. H. Kim [13 k 14]. X. J. Wu with W. G. Priced used shallow... 100-m Barge B4 12. 2 tons 6. 2 tons B6 52. 4 tons 44. 1 tons B8 B10 66. 5 tons 71. 3 tons 71. 2 tons 82. 6 tons ( B eau f ar t Seal e ) Table 2. Review of Most Probable Maximum Stress in a. 5-cm Diameter Hoisting Wire for Various Conditions...

  2. Performance, Loads and Stability of Heavy Lift Tiltrotors

    Microsoft Academic Search

    C. W. Acree; Wayne Johnson

    Summaries of rotor performance are presented for a 124,000-lb Large Civil Tilt Rotor (LCTR) design, along with isolated-rotor and fully-coupled wing\\/rotor aeroelastic stability. A major motivation of the present research is the effect of size on rotor dynamics. Simply scaling up existing rotor designs to the vehicle size under study would result in unacceptable rotor weight. The LCTR was the

  3. Impact of Aerodynamics and Structures Technology on Heavy Lift Tiltrotors

    NASA Technical Reports Server (NTRS)

    Acree, C. W., Jr.

    2006-01-01

    Rotor performance and aeroelastic stability are presented for a 124,000-lb Large Civil Tilt Rotor (LCTR) design. It was designed to carry 120 passengers for 1200 nm, with performance of 350 knots at 30,000 ft altitude. Design features include a low-mounted wing and hingeless rotors, with a very low cruise tip speed of 350 ft/sec. The rotor and wing design processes are described, including rotor optimization methods and wing/rotor aeroelastic stability analyses. New rotor airfoils were designed specifically for the LCTR; the resulting performance improvements are compared to current technology airfoils. Twist, taper and precone optimization are presented, along with the effects of blade flexibility on performance. A new wing airfoil was designed and a composite structure was developed to meet the wing load requirements for certification. Predictions of aeroelastic stability are presented for the optimized rotor and wing, along with summaries of the effects of rotor design parameters on stability.

  4. [Phlebopathies and occupation].

    PubMed

    Sancini, A; Tomei, G; Schifano, M P; Nardone, N; Andreozzi, G; Scimitto, L; Fiaschetti, M; De Sio, S; Scala, B; Capozzella, A; Suppi, A; Cetica, C; Tomei, F; Ciarrocca, M

    2012-01-01

    Chronic venous disorder is a public health problem that affects the western industrialized countries. The aim of this study is to evaluate the etiology and prevalence of venous disease of the lower limb in workers, and to identify some risk factors using a detailed and systematic analysis of the literature from 1964 to 2011. There is an important relationship between standing position at work and venous disease. The prolonged orthostatic position of the body implies: venostasis, high pressure and risks of blood clots and thrombosis; in standing workers there is an overproduction of reactive oxygen species (ROS) with oxidation of the components of cell membranes, endothelial damage and increase in vascular permeability. Other risk factors were investigated: sitting during work time, weight lifting-moving and exposure to heat sources, the data suggest that this risk factors are less important than orthostatic body position. Age, sex and familiarity are relevant as the extra-occupational risk factors. For a more accurate study of the role of the prolonged orthostatic position on the development of venous disease in the lover limb all authors should define exactly the population, the role and the length of standing time at work. They should also set a universal language to define the correct standing position (ie. within 1 m2 or steps) and time (ie. one hour or 50%-70% of work time). Attention should be given to prevention, to use early therapeutic measures in view of mortality as a consequence of venous disease, of the high social costs related to the loss of working days, of medical care and of residual disability. PMID:22755500

  5. Selected Health Service Occupations.

    ERIC Educational Resources Information Center

    Coleman, Arthur D.

    Prepared by an occupational analyst of the Utah Department of Employment Security, this manual provides job guides for 39 health service occupations concerned mainly with doctors, nurses, and related hospital-medical-health consultants and services. Classified according to "The Dictionary of Occupational Titles," each occupational description…

  6. Rotating cylinder design as a lifting generator

    NASA Astrophysics Data System (ADS)

    Asrokin, Azharrudin; Rizal Ramly, Mohammad; Halim Ahmad, Abdul

    2013-12-01

    The airfoil shape of a wing has always been the design to generate lift. But few realized that a simple rotating cylinder can also create lift. However, the explanation and study of how a rotating cylinder creates lift are still complex. In remote area where it is difficult for air vehicle to access, the exploration and discovery of different configuration for design concept is rather important. Due to this reason, there is a need to think of a lift generator that can produce better lift (few fold better than conventional airfoil) at lower speed to take off in a short distance of time. This paper will explain the conditions and the design of such a wing using the rotating cylinder concept that will take off in a short time and requires little takeoff and landing strip. Spokes will be attached to the cylinder to force the surrounding air to rotate along with the cylinder. This will create a vortex that hastens the speed of the air on top of the cylinder and at the same time retarding the speed of air below the cylinder. From the results, the rougher surface cylinder produces more lift when rotating and also, higher speed rotation of the cylinder greatly changes the speed of the surrounding air, thus better lift.

  7. Calculating the Lifting Condensation Level (LCL)

    NSDL National Science Digital Library

    1996-01-01

    This Javascript calculator was designed to calculate lifting condensation level (LCL) conditions using only three atmospheric input parameters that are commonly measured and reported during most local televised weather forecasts: surface temperature, surface dewpoint, and surface pressure. Output is pressure and parcel temperature at LCL. Though this calculator was designed to calculate the lifting condensation level for a parcel of air lifted from the surface, you calculate the LCL conditions for an air parcel at any other pressure level by substituting values appropriately. There is also a link to a calculator that will convert temperature reading from Celsius to Fahrenheit to Kelvin units.

  8. Wingless Flight: The Lifting Body Story

    NASA Technical Reports Server (NTRS)

    Reed, R. Dale; Lister, Darlene (Editor); Huntley, J. D. (Editor)

    1997-01-01

    Wingless Flight tells the story of the most unusual flying machines ever flown, the lifting bodies. It is my story about my friends and colleagues who committed a significant part of their lives in the 1960s and 1970s to prove that the concept was a viable one for use in spacecraft of the future. This story, filled with drama and adventure, is about the twelve-year period from 1963 to 1975 in which eight different lifting-body configurations flew. It is appropriate for me to write the story, since I was the engineer who first presented the idea of flight-testing the concept to others at the NASA Flight Research Center. Over those twelve years, I experienced the story as it unfolded day by day at that remote NASA facility northeast of los Angeles in the bleak Mojave Desert. Benefits from this effort immediately influenced the design and operational concepts of the winged NASA Shuttle Orbiter. However, the full benefits would not be realized until the 1990s when new spacecraft such as the X-33 and X-38 would fully employ the lifting-body concept. A lifting body is basically a wingless vehicle that flies due to the lift generated by the shape of its fuselage. Although both a lifting reentry vehicle and a ballistic capsule had been considered as options during the early stages of NASA's space program, NASA initially opted to go with the capsule. A number of individuals were not content to close the book on the lifting-body concept. Researchers including Alfred Eggers at the NASA Ames Research Center conducted early wind-tunnel experiments, finding that half of a rounded nose-cone shape that was flat on top and rounded on the bottom could generate a lift-to-drag ratio of about 1.5 to 1. Eggers' preliminary design sketch later resembled the basic M2 lifting-body design. At the NASA Langley Research Center, other researchers toyed with their own lifting-body shapes. Meanwhile, some of us aircraft-oriented researchers at the, NASA Flight Research Center at Edwards Air Force Base (AFB) in California were experiencing our own fascination with the lifting-body concept. A model-aircraft builder and private pilot on my own time, I found the lifting-body idea intriguing. I built a model based on Eggers' design, tested it repeatedly, made modifications in its control and balance characteristics along the way, then eventually presented the concept to others at the Center, using a film of its flights that my wife, Donna and I had made with our 8-mm home camera.

  9. The varied options in brow lifting.

    PubMed

    Nahai, Farzad R

    2013-01-01

    Numerous options in brow lifting exist that can be broadly categorized as open and minimally invasive or endoscopic. Proper patient evaluation, procedural goals, and surgeon preference all play into procedure choice. There are common desirable traits of the esthetic brow. One must take into account gender differences when considering alteration of the brow. Multiple options exist for brow fixation. One must take into account 3 factors during brow lift: release of the brow, brow fixation after advancement, and depressor muscle release. A brow lift will affect the amount of excess upper lid skin and pretarsal lid show. PMID:23186759

  10. Heavy Equipment. Trade and Industrial Education Trade Preparatory Training Guide.

    ERIC Educational Resources Information Center

    Nebraska State Dept. of Education, Lincoln. Div. of Vocational Education.

    One of a series of curriculum guides prepared for the building occupations cluster of the construction/fabrication occupational group, this guide identifies the essentials of the heavy equipment trade as recommended by the successful heavy equipment operator. An instructional program based upon the implementation of the guide is expected to…

  11. The LiftLT: fast-lapped transforms via lifting steps

    Microsoft Academic Search

    Trac D. Tran

    2000-01-01

    This paper introduces a class of multiband linear phase-lapped biorthogonal transforms with fast, VLSI-friendly implementations via lifting steps called the LiftLT. The transform is based on a lattice structure that robustly enforces both linear phase and perfect reconstruction properties. The lattice coefficients are parameterized as a series of lifting steps, providing fast, efficient, in-place computation of the transform coefficients. The

  12. Lifted Probabilistic Inference with Counting Formulas

    E-print Network

    Haimes, Michael M.

    Lifted inference algorithms exploit repeated structure in probabilistic models to answer queries efficiently. Previous work such as de Salvo Braz et al.'s first-order variable elimination (FOVE) has focused on the sharing ...

  13. Lifted Probabilistic Inference with Counting Formulas

    E-print Network

    Milch, Brian

    2008-01-01

    Lifted inference algorithms exploit repeated structure in probabilistic models to answer queries efficiently. Previous work such as de Salvo Braz et al.'s first-order variable elimination (FOVE) has focused on the sharing ...

  14. A lifting surface theory in rotational flow

    NASA Technical Reports Server (NTRS)

    Shiau, M. J.; Lan, C. E.

    1983-01-01

    The partial differential equation for small disturbance steady rotational flow in three dimensions is solved through an integral equation approach. The solution is obtained by using the method of weighted residuals. Specific applications are directed to wings in nonuniform subsonic parallel streams with velocity varying in vertical and spanwise directions and to airfoils in nonuniform freestream. Comparison with limited known results indicates that the present method is reasonably accurate. Numerical results for the lifting pressure of airfoil, lift, induced drag, and pitching moments of airfoil, lift, induced drag, and pitching moments of elliptic, rectangular, and delta wings in a jet, wake, or monotonic sheared stream are presented. It is shown that, in addition to the effect of local dynamic pressures, a positive velocity gradient tends to enhance the lift.

  15. Lift/cruise fan VTOL aircraft

    NASA Technical Reports Server (NTRS)

    Quigley, H. C.; Franklin, J. A.

    1977-01-01

    The paper gives an overview of the technology related to lift/cruise fan VTOL aircraft, covering propulsion systems, thrust deflection, flight dynamics, controls, displays, aerodynamics, and configurations. Piloting problems are discussed, and the need for integration of power management and thrust-vector controls is pointed out. Major components for a high-bypass-ratio lift/cruise fan propulsion system for VTOL aircraft have been tested.

  16. A Method for Calculation of Hydrodynamic Lift for Submerged and Planing Rectangular Lifting Surfaces

    NASA Technical Reports Server (NTRS)

    Wadlin, Kenneth L; Christopher, Kenneth W

    1958-01-01

    A method is presented for the calculation of lift coefficients for rectangular lifting surfaces of aspect ratios from 0.125 to 10 operating at finite depths beneath the water surface, including the zero depth or planing condition. Theoretical values are compared with experimental values obtained at various depths of submergence with lifting surfaces of aspect ratios from 0.125 to 10. The method can also be applied to hydrofoils with dihedral. Lift coefficients computed by this method are in good agreement with existing experimental data for aspect ratios from 0.125 to 10 and dihedral angles up to 10 degrees.

  17. A Method for Calculation of Hydrodynamic Lift for Submerged and Planing Rectangular Lifting Surfaces

    NASA Technical Reports Server (NTRS)

    Wadlin, Kenneth L.; Christopher, Kenneth W.

    1959-01-01

    A method is presented for the calculation of lift coefficients for rectangular lifting surfaces of aspect ratios from 0.125 to 10 operating at finite depths beneath the water surface, including the zero depth or planing condition. Theoretical values are compared with experimental values obtained at various depths of submergence with lifting surfaces of aspect ratios from 0.125 to 10. The method can also be applied to hydrofoils with dihedral. Lift coefficients computed by this method are in good agreement with existing experimental data for aspect ratios from 0.125 to 10 and dihedral angles up to 30 deg.

  18. Novice lifters exhibit a more kyphotic lifting posture than experienced lifters in straight-leg lifting.

    PubMed

    Riley, A E; Craig, T D; Sharma, N K; Billinger, S A; Wilson, S E

    2015-07-16

    As torso flexion and repetitive lifting are known risk factors for low back pain and injury, it is important to investigate lifting techniques that might reduce injury during repetitive lifting. By normalizing lumbar posture to a subject's range of motion (ROM), as a function of torso flexion, this research examined when subjects approached their range of motion limits during dynamic lifting tasks. For this study, it was hypothesized that experienced lifters would maintain a more neutral lumbar angle relative to their range of motion, while novice lifters would approach the limits of their lumbar ROM during the extension phase of a straight-leg lift. The results show a statistically significant difference in lifting patterns for these two groups supporting this hypothesis. The novice group maintained a much more kyphotic lumbar angle for both the flexion (74% of the lumbar angle ROM) and extension phases (86% of the lumbar angle ROM) of the lifting cycle, while the experienced group retained a more neutral curvature throughout the entire lifting cycle (37% of lumbar angle ROM in flexion and 48% of lumbar angle ROM in extension). By approaching the limits of their range of motion, the novice lifters could be at greater risk of injury by placing greater loads on the supporting soft tissues of the spine. Future research should examine whether training subjects to assume more neutral postures during lifting could indeed lower injury risks. PMID:26077846

  19. Lift and wakes of flying snakes

    NASA Astrophysics Data System (ADS)

    Krishnan, Anush; Socha, John J.; Vlachos, Pavlos P.; Barba, L. A.

    2014-03-01

    Flying snakes use a unique method of aerial locomotion: they jump from tree branches, flatten their bodies, and undulate through the air to produce a glide. The shape of their body cross-section during the glide plays an important role in generating lift. This paper presents a computational investigation of the aerodynamics of the cross-sectional shape. Two-dimensional simulations of incompressible flow past the anatomically correct cross-section of the species Chrysopelea paradisi show that a significant enhancement in lift appears at a 35° angle of attack, above Reynolds numbers 2000. Previous experiments on physical models also obtained an increased lift, at the same angle of attack. The flow is inherently three-dimensional in physical experiments, due to fluid instabilities, and it is thus intriguing that the enhanced lift also appears in the two-dimensional simulations. The simulations point to the lift enhancement arising from the early separation of the boundary layer on the dorsal surface of the snake profile, without stall. The separated shear layer rolls up and interacts with secondary vorticity in the near-wake, inducing the primary vortex to remain closer to the body and thus cause enhanced suction, resulting in higher lift.

  20. Survey of lift-fan aerodynamic technology

    NASA Technical Reports Server (NTRS)

    Hickey, David H.; Kirk, Jerry V.

    1993-01-01

    Representatives of NASA Ames Research Center asked that a summary of technology appropriate for lift-fan powered short takeoff/vertical landing (STOVL) aircraft be prepared so that new programs could more easily benefit from past research efforts. This paper represents one of six prepared for that purpose. The authors have conducted or supervised the conduct of research on lift-fan powered STOVL designs and some of their important components for decades. This paper will first address aerodynamic modeling requirements for experimental programs to assure realistic, trustworthy results. It will next summarize the results or efforts to develop satisfactory specialized STOVL components such as inlets and flow deflectors. It will also discuss problems with operation near the ground, aerodynamics while under lift-fan power, and aerodynamic prediction techniques. Finally, results of studies to reduce lift-fan noise will be presented. The paper will emphasize results from large scale experiments, where available, for reasons that will be brought out in the discussion. Some work with lift-engine powered STOVL aircraft is also applicable to lift-fan technology and will be presented herein. Small-scale data will be used where necessary to fill gaps.

  1. An evaluation of back support devices for females involved in lifting tasks 

    E-print Network

    Sherwood, Caroline Anne

    1988-01-01

    injury to the lower back. One such option is to provide the worker with a mechanical aid to support the lumbar region. This study evaluates three different types of mechanical support belts. The first is a simple, olympic style, weight-training belt... used universally to aid athletes in lifting heavy weights. The other two are commerically available support belts, the Air Belt, manufactured by the Pneumedic Corporation, and the CompVest, produced by the Comp Equipment Corporation. The objective...

  2. VLSI architecture of wavelet transform based on basic lifting elements

    NASA Astrophysics Data System (ADS)

    Guo, Jie; Li, Yunsong; Wang, Keyan; Wu, Chengke

    2009-08-01

    In this paper, we propose a lifting architecture based on a basic lifting unit, whose structure performs lifting operations in a repetitive way. By analyzing computational processes in lifting in detail, the reusable Basic Lifting Element (BLE) is presented. The BLE structure is designed and optimized from the viewpoint of hardware implementation. The proposed lifting processor can be executed by arranging BLEs repeatedly. Experimental results show that the proposed architecture can transform any size of tiles with 9/7 filter and 5/3 filter for lossy and lossless compression, respectively. The lifting processor is designed in Verilog HDL and synthesized into Xilinx FPGA, which can run up to 130MHz.

  3. Assessment of occupational injuries among Addis Ababa city municipal solid waste collectors: a cross-sectional study

    PubMed Central

    2014-01-01

    Background Collection of household waste is a job which requires repeated heavy physical activities such as lifting, carrying, pulling, and pushing. Like many developing countries, in Ethiopia municipal solid waste is collected manually. Therefore, this study is aimed to assess the extent of occupational injuries and associated factors among solid waste collectors in Addis Ababa City. Methods A cross-sectional study was conducted among 876 respondents sampled from 92 unions. A pre-tested structured questionnaire and observation check list were used to collect data. Crude odds ratio with 95% CI was computed to see the presence of association between selected independent variables and occupational injury. Multivariate logistic regression analysis was made to see the relative effect of independent variable on the dependent variable by controlling the effect of other variables. To maintain stability, only variables that have a p-value less than 0.30 in the binary logistic regression analysis were kept in the subsequent model. Enter method was used hierarchically. Results The response rate of this study was 97.9%. Female respondents accounted 71.2%. The median age of the study subjects was 33 year (with 52 inter quartile range). The overall occupational injury prevalence rate in the last 12 months was 383 (43.7%). Utilization of personal protective devices and family size in the household were statistically associated with injury. As compared to workers who used personal protective equipments while being on duty, odds of injury among workers not used personal protective equipments were 2.62 higher (AOR?=?2.62, 95% CI: 1.48-4.63). As compared to those who had five and more children, odds of injuries among those who had 3-4 children was reduced by half (AOR?=?0.52, 95% CI: 0.30-0.93). Conclusion The extent of occupational injuries among Addis Ababa city solid waste collectors is present in a level that needs immediate public health action. Implementation of basic occupational health and safety services including training on occupational health and safety, ensuring the provision and use of personal protective devices are highly advisable. PMID:24528849

  4. Occupational Clusters. Occupational Investigation Guide. First Edition.

    ERIC Educational Resources Information Center

    East Texas State Univ., Commerce. Occupational Curriculum Lab.

    This occupational investigation guide contains learning activities for instruction in fifteen occupational clusters: (1) agribusiness and natural resources, (2) business and office, (3) communications and media, (4) construction, (5) consumer and homemaking, (6) environment, (7) fine arts and humanities, (8) health, (9) hospitality and recreation,…

  5. Occupational Radiation Exposures

    Cancer.gov

    DCEG researchers are studying cancer risks among populations who are occupationally exposed to radiation. Chernobyl Clean-up Workers Mayak Nuclear Facility Workers U.S. Radiologic Technologists Interventional Fluoroscopists Print This Page Occupational

  6. Rehabilitation Services Sample Occupations

    E-print Network

    Ronquist, Fredrik

    Rehabilitation Services Sample Occupations Sample Work Settings Child & Day Care Centers Clinics Facilities/ Agencies Non-Profit Rehabilitation Director Employee Assistant Counselor Employment Agency Worker Rehabilitation Companies Schools for People with Disabilities Schools/Colleges Occupational Specialist (FL

  7. Occupational Hearing Loss in Korea

    PubMed Central

    2010-01-01

    In this article, current status of noise exposure in workplaces, trend of workers with noise-induced hearing loss (NIHL), and prevalence of NIHL in workers by industry and job category in Korea were reviewed. In addition, trends of research on the audiological effects such as hearing loss from noise and occupational hearing loss from non-noise in Korea were addressed through reports in industrial audiology. Though noise exposure level has improved, noise still shows the highest rate of cases exceeding exposure limit among workplace hazards. NIHL is the most common occupational disease except work-related disease such as musculoskeletal disorders and cerebrovascular diseases, and NIHL prevalence is thought to be much higher than reported in official publications. Noise affecting hearing comes from various sources such as workplaces, military settings, areas with exposure to high noise, and specific noise sources. There is also occupational hearing loss by non-noise including chemicals such as organic solvents and heavy metals, barotrauma, and trauma due to welding spark. Noise affects daily life through audiological effects such as hearing loss and tinnitus, non-audiological physical effects (e.g., cardiovascular), and psychosocial and behavioral effects. Development of systematic and comprehensive hearing conservation programs for lowering the noise level in workplaces and preventing the NIHL, and preparation of technological, administrative system for its settlement at workplace are urgently needed. PMID:21258593

  8. Correlation of lifting versus non-lifting and microscopic depth of invasion in early colorectal cancer

    Microsoft Academic Search

    Ayako Ishiguro; Yoshiharu Uno; Yoh Ishiguro; Akihiro Munakata; Takayuki Morita

    1999-01-01

    Background:  The non-lifting sign is considered a contraindication to endoscopic resection. Our objective was to investigate whether lifting or nonlifting of a lesion is determined by the volume of normal submucosal tissue. Methods:  We measured the thickness of the submucosa and examined the relation between submucosal invasion and lesion elevation induced by submucosal injection in 60 patients with colorectal cancer

  9. Occupation and Thyroid Cancer

    PubMed Central

    Aschebrook-Kilfoy, Briseis; Ward, Mary H.; Valle, Curt T. Della; Friesen, Melissa C.

    2014-01-01

    Objectives Numerous occupational and environmental exposures have been shown to disrupt thyroid hormones, but much less is known about their relationships with thyroid cancer. Here we review the epidemiology studies of occupations and occupational exposures and thyroid cancer incidence to provide insight into preventable risk factors for thyroid cancer. Methods The published literature was searched using the Web of Knowledge database for all articles through August 2013 that had in their text “occupation” “job” ”employment” or “work” and “thyroid cancer”. After excluding 10 mortality studies and 4 studies with less than 5 exposed incident cases, we summarized the findings of 30 articles that examined thyroid cancer incidence in relation to occupations or occupational exposure. The studies were grouped by exposure/occupation category, study design, and exposure assessment approach. Where available, gender stratified results are reported. Results The most studied (19 of 30 studies) and the most consistent associations were observed for radiation-exposed workers and health care occupations. Suggestive, but inconsistent, associations were observed in studies of pesticide-exposed workers and agricultural occupations. Findings for other exposures and occupation groups were largely null. The majority of studies had few exposed cases and assessed exposure based on occupation or industry category, self-report, or generic (population-based) job exposure matrices. Conclusion The suggestive, but inconsistent findings for many of the occupational exposures reviewed here indicate that more studies with larger numbers of cases and better exposure assessment are necessary, particularly for exposures known to disrupt thyroid homeostasis. PMID:24604144

  10. Occupational medicine and toxicology

    Microsoft Academic Search

    David A Groneberg; Axel Fischer

    2006-01-01

    This editorial is to announce the Journal of Occupational Medicine and Toxicology, a new Open Access, peer-reviewed, online journal published by BioMed Central. Occupational medicine and toxicology belong to the most wide ranging disciplines of all medical specialties. The field is devoted to the diagnosis, prevention, management and scientific analysis of diseases from the fields of occupational and environmental medicine

  11. OCCUPATIONAL SAFETY and HEALTH

    E-print Network

    Weaver, Harold A. "Hal"

    MARYLAND OCCUPATIONAL SAFETY and HEALTH ACT safety and health protection on the job STATE OCCUPATIONAL SAFETY AND HEALTH STANDARDS, AND OTHER APPLICABLE REGULATIONS MAY BE OBTAINED FROM 19106-3309 The Maryland Occupational Safety and Health Act of 1973 provides job safety and health

  12. Health Occupations Cluster Guide.

    ERIC Educational Resources Information Center

    Oregon State Dept. of Education, Salem.

    Intended to assist the vocational teacher in designing and implementing a cluster program in health occupations, this guide suggests ideas for teaching the specific knowledge and skills that qualify students for entry-level employment in the health occupations field. The knowledge and skills are applicable to 12 occupations: dental assistant;…

  13. Characterization of Partially Lifted Cell Sheets

    PubMed Central

    Wei, Qi

    2014-01-01

    There is a need to characterize biomechanical cell–cell interactions, but due to a lack of suitable experimental methods, relevant in vitro experimental data are often masked by cell–substrate interactions. This study describes a novel method to generate partially lifted substrate-free cell sheets that engage primarily in cell–cell interactions, yet are amenable to biological and chemical perturbations and, importantly, mechanical conditioning and characterization. A polydimethylsiloxane (PDMS) mold is used to isolate a patch of cells, and the patch is then enzymatically lifted. The cells outside the mold remain attached, creating a partially lifted cell sheet. This simple yet powerful tool enables the simultaneous examination of lifted and adherent cells. This tool was then deployed to test the hypothesis that the lifted cells would exhibit substantial reinforcement of key cytoskeletal and junctional components at cell–cell contacts, and that such reinforcement would be enhanced by mechanical conditioning. Results demonstrate that the mechanical strength and cohesion of the substrate-free cell sheets strongly depend on the integrity of the actomyosin cytoskeleton and the cell–cell junctional protein plakoglobin. Both actin and plakoglobin are significantly reinforced at junctions with mechanical conditioning. However, total cellular actin is significantly diminished on dissociation from a substrate and does not recover with mechanical conditioning. These results represent a first systematic examination of mechanical conditioning on cells with primarily intercellular interactions. PMID:24359148

  14. Lift and wakes of flying snakes

    E-print Network

    Krishnan, Anush; Vlachos, Pavlos P; Barba, L A

    2013-01-01

    Flying snakes use a unique method of aerial locomotion: they jump from tree branches, flatten their bodies and undulate through the air to produce a glide. The shape of their body cross-section during the glide plays an important role in generating lift. This paper presents a computational investigation of the aerodynamics of the cross-sectional shape. We performed two-dimensional simulations of incompressible flow past the anatomically correct cross-section of the species Chrysopelea paradisi, showing that a significant enhancement in lift appears at an angle of attack of 35 degrees, above Reynolds numbers 2000. Previous experiments on physical models also obtained an increased lift, at the same angle of attack. The flow is inherently three-dimensional in physical experiments, due to fluid instabilities, and it is thus intriguing that the enhanced lift appears also in the two-dimensional simulations. The simulations point to the lift enhancement arising from the early separation of the boundary layer on the ...

  15. Health Occupations Curriculum. Skills for Nursing Assistant. Volume 3, Unit 8.

    ERIC Educational Resources Information Center

    Arizona State Dept. of Education, Phoenix.

    Part of a health occupations program, this instructional unit contains 13 learning modules for use in training nursing assistants. Covered in the modules are (1) making beds, bathing patients, and measuring intake and output; (2) body mechanics, moving and lifting patients, range of motion exercises, and caring for patients in casts or traction;…

  16. Coriolis effects enhance lift on revolving wings.

    PubMed

    Jardin, T; David, L

    2015-03-01

    At high angles of attack, an aircraft wing stalls. This dreaded event is characterized by the development of a leading edge vortex on the upper surface of the wing, followed by its shedding which causes a drastic drop in the aerodynamic lift. At similar angles of attack, the leading edge vortex on an insect wing or an autorotating seed membrane remains robustly attached, ensuring high sustained lift. What are the mechanisms responsible for both leading edge vortex attachment and high lift generation on revolving wings? We review the three main hypotheses that attempt to explain this specificity and, using direct numerical simulations of the Navier-Stokes equations, we show that the latter originates in Coriolis effects. PMID:25871040

  17. Occupational Employment Statistics

    NSDL National Science Digital Library

    US occupations are featured in this information-rich resources from the Bureau of Labor Statistics. The 1996 Occupational Employment Statistics Survey differs from previous surveys in that it includes wage data by occupation for the first time. The site contains a description of the survey and complete national and state data for 760 occupations in seven major areas. Included are occupation title, number of employees, hourly mean and median wage, and an OES code number that provides information about the occupation and its employment distribution by wage range where surveyed (distribution is for the national survey only). An occupational search engine is forthcoming. The site also contains information about previous OES surveys back to 1988.

  18. Frequency response of lift control in Drosophila.

    PubMed

    Graetzel, Chauncey F; Nelson, Bradley J; Fry, Steven N

    2010-11-01

    The flight control responses of the fruitfly represent a powerful model system to explore neuromotor control mechanisms, whose system level control properties can be suitably characterized with a frequency response analysis. We characterized the lift response dynamics of tethered flying Drosophila in presence of vertically oscillating visual patterns, whose oscillation frequency we varied between 0.1 and 13 Hz. We justified these measurements by showing that the amplitude gain and phase response is invariant to the pattern oscillation amplitude and spatial frequency within a broad dynamic range. We also showed that lift responses are largely linear and time invariant (LTI), a necessary condition for a meaningful analysis of frequency responses and a remarkable characteristic given its nonlinear constituents. The flies responded to increasing oscillation frequencies with a roughly linear decrease in response gain, which dropped to background noise levels at about 6 Hz. The phase lag decreased linearly, consistent with a constant reaction delay of 75 ms. Next, we estimated the free-flight response of the fly to generate a Bode diagram of the lift response. The limitation of lift control to frequencies below 6 Hz is explained with inertial body damping, which becomes dominant at higher frequencies. Our work provides the detailed background and techniques that allow optomotor lift responses of Drosophila to be measured with comparatively simple, affordable and commercially available techniques. The identification of an LTI, pattern velocity dependent, lift control strategy is relevant to the underlying motion computation mechanisms and serves a broader understanding of insects' flight control strategies. The relevance and potential pitfalls of applying system identification techniques in tethered preparations is discussed. PMID:20462877

  19. Frequency response of lift control in Drosophila

    PubMed Central

    Graetzel, Chauncey F.; Nelson, Bradley J.; Fry, Steven N.

    2010-01-01

    The flight control responses of the fruitfly represent a powerful model system to explore neuromotor control mechanisms, whose system level control properties can be suitably characterized with a frequency response analysis. We characterized the lift response dynamics of tethered flying Drosophila in presence of vertically oscillating visual patterns, whose oscillation frequency we varied between 0.1 and 13 Hz. We justified these measurements by showing that the amplitude gain and phase response is invariant to the pattern oscillation amplitude and spatial frequency within a broad dynamic range. We also showed that lift responses are largely linear and time invariant (LTI), a necessary condition for a meaningful analysis of frequency responses and a remarkable characteristic given its nonlinear constituents. The flies responded to increasing oscillation frequencies with a roughly linear decrease in response gain, which dropped to background noise levels at about 6 Hz. The phase lag decreased linearly, consistent with a constant reaction delay of 75 ms. Next, we estimated the free-flight response of the fly to generate a Bode diagram of the lift response. The limitation of lift control to frequencies below 6 Hz is explained with inertial body damping, which becomes dominant at higher frequencies. Our work provides the detailed background and techniques that allow optomotor lift responses of Drosophila to be measured with comparatively simple, affordable and commercially available techniques. The identification of an LTI, pattern velocity dependent, lift control strategy is relevant to the underlying motion computation mechanisms and serves a broader understanding of insects' flight control strategies. The relevance and potential pitfalls of applying system identification techniques in tethered preparations is discussed. PMID:20462877

  20. A lifting line model for propeller noise

    NASA Astrophysics Data System (ADS)

    Brouwer, H. H.

    1989-04-01

    The possibility of calculating the sound field of a propeller from knowledge of the spanwise lift distribution, is investigated. An expression for the sound pressure is derived within a first-order approximation for blades of high aspect ratio. In this approximation the propeller is described by a system of rotating lifting lines. Numerical results for a six-bladed model propeller are compared with experimental data and the results of a theory based on a detailed description of the propeller geometry. It appears that for a high-aspect-ratio propeller, the agreement is satisfactory.

  1. The PDU is lifted to Atlantis at

    NASA Technical Reports Server (NTRS)

    2000-01-01

    At Launch Pad 39A, a worker watches as the plastic-covered replacement Power Drive Unit (PDU) for Space Shuttle Atlantis is lifted by crane toward the tail. The PDU controls the rudder/speed brake on the orbiter. Atlantis is scheduled to lift off April 24 at 4:15 p.m. EDT on mission STS-101, the third flight to the International Space Station. The primary mission is to carry logistics and supplies to the Space Station, plus the crew will be preparing the Station for the arrival of the Zvezda Service Module, expected to be launched by Russia in July 2000.

  2. Discovery is lifted in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    The orbiter Discovery (seen from the front) is lifted to vertical in the transfer aisle of the Vehicle Assembly Building. It will then be lifted up and into high bay 1 for mating with its solid rocket boosters and external tank. Discovery will be launched March 8 on mission STS-102, the eighth construction flight to the International Space Station. The Shuttle will carry the Multi- Purpose Logistics Module Leonardo, the first of three pressurized modules provided by the Italian Space Agency to carry supplies and equipment to the Space Station and back to earth.

  3. Discovery is lifted in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    In the transfer aisle of the Vehicle Assembly Building, the orbiter Discovery (seen from the back) is lifted to vertical. It will then be lifted up and into high bay 1 for mating with its solid rocket boosters and external tank. Discovery will be launched March 8 on mission STS-102, the eighth construction flight to the International Space Station. The Shuttle will carry the Multi-Purpose Logistics Module Leonardo, the first of three pressurized modules provided by the Italian Space Agency to carry supplies and equipment to the Space Station and back to earth.

  4. Discovery is lifted in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    The orbiter Discovery is lifted by cranes in the transfer aisle of the Vehicle Assembly Building. It will next be lifted into a vertical position and into high bay 1 for mating with its solid rocket boosters and external tank. Discovery will be launched March 8 on mission STS-102, the eighth construction flight to the International Space Station. The Shuttle will carry the Multi- Purpose Logistics Module Leonardo, the first of three pressurized modules provided by the Italian Space Agency to carry supplies and equipment to the Space Station and back to Earth.

  5. Discovery is lifted in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    The underside of orbiter Discovery is seen as it is lifted to vertical in the transfer aisle of the Vehicle Assembly Building. It will then be lifted up and into high bay 1 for mating with its solid rocket boosters and external tank. Discovery will be launched March 8 on mission STS-102, the eighth construction flight to the International Space Station. The Shuttle will carry the Multi-Purpose Logistics Module Leonardo, the first of three pressurized modules provided by the Italian Space Agency to carry supplies and equipment to the Space Station and back to earth.

  6. Discovery is lifted in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    In the transfer aisle of the Vehicle Assembly Building the orbiter Discovery is suspended at an angle as it is lifted to a vertical position. It will next be lifted into high bay 1 for mating with its solid rocket boosters and external tank. Discovery will be launched March 8 on mission STS-102, the eighth construction flight to the International Space Station. The Shuttle will carry the Multi-Purpose Logistics Module Leonardo, the first of three pressurized modules provided by the Italian Space Agency to carry supplies and equipment to the Space Station and back to Earth.

  7. Soccer ball lift coefficients via trajectory analysis

    NASA Astrophysics Data System (ADS)

    Goff, John Eric; Carré, Matt J.

    2010-07-01

    We performed experiments in which a soccer ball was launched from a machine while two high-speed cameras recorded portions of the trajectory. Using the trajectory data and published drag coefficients, we extracted lift coefficients for a soccer ball. We determined lift coefficients for a wide range of spin parameters, including several spin parameters that have not been obtained by today's wind tunnels. Our trajectory analysis technique is not only a valuable tool for professional sports scientists, it is also accessible to students with a background in undergraduate-level classical mechanics.

  8. Comparison of Lifting-line and Lifting-surface Blade Models for Rotor Wakes

    NASA Astrophysics Data System (ADS)

    Kini, Santosh; Godavarty, Vishwanath; Conlisk, A. T.

    2001-11-01

    Rotor blades are often modeled using either the lifting-line or the lifting-surface approach. Classical lifting-line theory treats the case of a high aspect ratio blade where the blade is modeled by just a bound vortex line. The tip-vortex and the trailing vortex sheet are shed from the bound vortex line. The lifting-line approach will thus be expected to be accurate for large aspect ratio wings and blades. In the lifting-surface approach the blade is modeled by a thin lifting surface to more precisely understand the aerodynamic behavior of the chordwise flow close to the blade surface and its effect on the formation of the tip-vortex and consequently the entire wake. Due to the presence of a finite chord, this model seems to be more robust as far as chordwise changes in flow patterns are concerned. The objective of the present work is to compare results from two distinct vortex-wake models. The Wake Model with Lifting-Line has a robust model for the wake. The Lifting-Surface Model with Wake Effects has a robust model for the lifting-surface with additional terms in the governing equations representing a simplified model for the wake. Bound and tip-vortex strengths, tip-vortex trajectories and velocity profiles are evaluated using these models very close to the blade. It is observed that the results obtained from these models are comparable. The minor discrepancies observed are explained in terms of the assumptions made. To establish the validity of the models the results are also compared with experimental data. Sponsored by the Rotorcraft Center of Excellence at Georgia Institute of Technology and the Army Research Office.

  9. Conceptual design of a lift fan plus lift/cruise fighter aircraft

    NASA Technical Reports Server (NTRS)

    Hill, G. C.; Waters, M. H.

    1974-01-01

    Results of a design synthesis and mission analysis of a supersonic VTOL fighter aircraft are presented. Propulsive lift is provided by a single turbotip-driven lift fan and deflected thrust from a high performance turbofan cruise engine fitted with an afterburner for supersonic flight. The inlet and thrust diverter in the main engine tail-pipe are seen to be the principal design problems. V/STOL and supersonic design tradeoffs are addressed in lift fan sizing and placement, reaction and aerodynamic control sizing, fuselage volume requirements, and area ruling. Range and turn rate are used as figures of merit.-

  10. Occupational health in Australia.

    PubMed

    Phoon, W O

    1998-09-01

    Australia is a developed country in the Asia-Pacific Region with a large land area but a small population. Its main economic activities are mining, agriculture and manufacturing, with its service and high-technology industries being the fastest growing sectors in recent years. The regulation and enforcement of Occupational Health and Safety policies are mainly administered by the Industrial Relations Departments of eight State and Territory jurisdictions in the country. A National Occupational Health and Safety Commission coordinates occupational health and safety at the Commonwealth level. In 1987 the six occupational health and safety priorities in Australia were listed as occupational back pain, management of chemicals used at work, occupational noise-induced hearing loss, occupational skin disorders, occupational cancer and mechanical equipment injury. Australia has probably the highest incidence of malignant mesothelioma in the world, although the use of asbestos has been largely phased out. There was an almost explosive "epidemic" of repetition strain injury in the 1980s. Approximately 500 work-related fatalities and 10,000 work-related injuries are notified for workers' compensation every year. In addition, it is estimated that there are several thousand cases of work-related diseases every year, many of which go unreported. Occupational physicians undergo 4 years of specialisation training. Occupational hygienists, nurses and ergonomists receive training supervised by their respective professional organisations. PMID:9766909

  11. Evolution of curvature invariants and lifting integrability

    E-print Network

    Kamp, Peter H. van der

    Evolution of curvature invariants and lifting integrability Elizabeth L. Mansfield and Peter H. van. These define the curvature and evolution invariants that are associated to curves moving in the given geometry. The syzygy between the curvature and evolution invariants is obtained as a zero curvature relation

  12. Complexity Spaces: Lifting & Directedness M. Schellekens

    E-print Network

    Schellekens, Michel P.

    Complexity Spaces: Lifting & Directedness M. Schellekens Abstract The theory of complexity spaces Analysis. The topological study of these spaces has been continued in the context of the theory of upper weightable spaces ([Sch96]), while the specific properties of total boundedness and Smyth completeness have

  13. O.H. Module Vacuum Lifting Fixture

    SciTech Connect

    McGivern, Paul; /Fermilab

    1987-12-31

    In order to move the 800 lb. copper plates that make up the O.H. modules a vacuum lifting device has been made that will lift the plates safely. The purpose of this report is to provide documentation for the structural integrity of the system and to make sure that it passes all of the safety requirements that have been established for a system of this nature. The vacuum system is composed of a PIAB model M125 vacuum pump that has the pumping capacity of 27 in. Hg. This pump will produce vacuum for three 8 1/2 in. diameter suction cups or pads. A pressure gauge is fixed on the unit to allow the operator to continually monitor the pressure during all lifts. An additional safety feature is a mechanical vacuum monitoring device that is set to emit a shrill tone if the system vacuum falls below 24 in. Hg. A 'bleed' valve fixed on the unit will be used to let the system go to atmospheric pressure once the lift is complete. A 3 psi. check valve and a vacuum reserve of 384 in. is used to insure that the device will not just drop the object if the pump fails. A schematic for the pumping system is given in Figure 1.

  14. LIFTED INEQUALITIES FOR A SOFTDRINK LOTSCHEDULING MODEL

    E-print Network

    Clark, Alistair

    of the West of England - UWE - Department of Engineering Design and Mathematics e-mail: alistair derived using a lifting procedure into a lot scheduling model applied to the soft-drink production;1 Introduction The development of a formulation that approximates the convex hull of a set of feasible points can

  15. Reducing eyelid retraction following subperiosteal face lift

    Microsoft Academic Search

    Dennis J. Hurwitz; Elsa M. Raskin

    1997-01-01

    The most common complication of lower blepharoplasty is malposition of the lower eyelid. This deformity may present as scleral show, ectropion, entropion, or canthal dystopia, with dry eye or epiphora. These problems occurred frequently in our initial series of patients undergoing blepharoplasty with subperiosteal face lift. The key to prevention lay in avoiding the potential causes of these problems: overresection

  16. Midface-lifting: evolution, indications, and technique.

    PubMed

    Hachach-Haram, Nadine; Kirkpatrick, W Niall A

    2013-08-01

    The youthful face is often defined by malar and lateral cheek fullness with associated submalar concavity, giving a smooth contour between the different subunits coupled with an aesthetically pleasing convex lower eyelid-cheek continuum. This article reviews the key anatomical concepts of midfacial aging, the evolution of midface-lifting techniques, and indications and contraindications for their use. PMID:23884850

  17. The Monoplane as a Lifting Vortex Surface

    NASA Technical Reports Server (NTRS)

    Blenk, Hermann

    1947-01-01

    In Prandtl's airfoil theory the monoplane was replaced by a single lifting vortex line and yielded fairly practical results. However, the theory remained restricted to the straight wing. Yawed wings and those curved in flight direction could not be computed with this first approximation; for these the chordwise lift distribution must be taken into consideration. For the two-dimensional problem the transition from the lifting line to the lifting surface has been explained by Birnbaum. In the present report the transition to the three-dimensional problem is undertaken. The first fundamental problem involves the prediction of flow, profile, and drag for prescribed circulation distribution on the straight rectangular wing, the yawed wing for lateral boundaries parallel to the direction of flight, the swept-back wing, and the rectangular wing in slipping, with the necessary series developments for carrying through the calculations, the practical range of convergence of which does not comprise the wing tips or the break point of the swept-back wing. The second problem concerns the calculation of the circulation distribution with given profile for a slipping rectangular monoplane with flat profile and aspect ratio 6, and a rectangular wing with cambered profile and variable aspect ratio-the latter serving as check of the so-called conversion formulas of the airfoil theory.

  18. Evaluation of hydraulic lift in cotton germplasm

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Hydraulic lift (HL) in plants is defined as the redistribution of water from wetter to drier soil through the plant roots in response to soil water potential gradients. Water is released from the roots into the dry soil when transpiration is low (night) and reabsorbed by the plant when higher transp...

  19. Resugaring: Lifting Evaluation Sequences through Syntactic Sugar

    E-print Network

    Krishnamurthi, Shriram

    Resugaring: Lifting Evaluation Sequences through Syntactic Sugar Justin Pombrio Brown University justinpombrio@cs.brown.edu Shriram Krishnamurthi Brown University sk@cs.brown.edu Abstract Syntactic sugar-specific lan- guages; and even to let programmers extend their language. Un- fortunately, syntactic sugar

  20. View uphill of single chair lift, tower 15 in foreground, ...

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

    View uphill of single chair lift, tower 15 in foreground, TOWERS 16 and 17 in the distance, LOOKING SOUTH. - Mad River Glen, Single Chair Ski Lift, 62 Mad River Glen Resort Road, Fayston, Washington County, VT

  1. Design of an electronically-actuated gas lift safety valve

    E-print Network

    Yu, Changkuan, S.M. Massachusetts Institute of Technology

    2013-01-01

    Gas lift valves are widely used in oil production fields to pump recycled gas and nitrogen into the production tubing, to sustain production by aerating the oil and lifting it to the ground or sea surface. Today's industry ...

  2. View of lifting girder and tower support superstructure on Tensaw ...

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

    View of lifting girder and tower support superstructure on Tensaw River Bridge truss No. 2, looking northwest. Showing rope connectors and deflector sheaves. - Tensaw River Lift Bridge, Spanning Tensaw River at U.S. Highway 90, Mobile, Mobile County, AL

  3. *Requires Periodic Medical Monitoring/Training For Departmental Use Only Rev 06/25/12 Occupational Medicine Program Supervisor Checklist for Health Assessments

    E-print Network

    Slatton, Clint

    painting, shelving books, running overhead cable, etc ____ Heavy Lifting 45 pounds and over ____ Human with a patient, or having contact with potentially contaminated items including (but not limited to) blood and

  4. The steady lifting surface theory with a free-surface

    NASA Astrophysics Data System (ADS)

    Leclerc, J.; Salauen, P.

    A method to solve the unsteady lifting surface problem is applied to steady surfaces with a free-surface. The local lifting coefficient appears as a solution to an integral equation of the first kind whose kernel, deduced from the Havelock source potential, is expanded in a Fourier series, with respect to the azimuth angle. Numerical applications such as the calculation of the lift and drag of a lifting wing, and hydrodynamic pressures in the case of turn of a ship are given.

  5. APPLICATION OF THE NIOSH REVISED LIFTING EQUATION TO ONE-HANDED LIFTING TASKS

    Microsoft Academic Search

    Richard F. Sesek; Donald S. Bloswick; David P. Gilkey

    This study investigated the ability of the Revised NIOSH Lifting Equation (RNLE) to measure this risk of low back injury as verified by employee health outcomes. The RNLE was predictive with an odds ratio of 5.1 (1.6-16.0, 95% CI). The RNLE was modified to allow analysis of one-handed and two-handed, asymmetric lifts. Predictive performance for these methods was promising with

  6. An Evidence-Based Multidisciplinary Practice Guideline to Reduce the Workload due to Lifting for Preventing Work-Related Low Back Pain

    PubMed Central

    2014-01-01

    We developed an evidence-based practice guideline to support occupational safety and health (OSH) professionals in assessing the risk due to lifting and in selecting effective preventive measures for low back pain (LBP) in the Netherlands. The guideline was developed at the request of the Dutch government by a project team of experts and OSH professionals in lifting and work-related LBP. The recommendations for risk assessment were based on the quality of instruments to assess the risk on LBP due to lifting. Recommendations for interventions were based on a systematic review of the effects of worker- and work directed interventions to reduce back load due to lifting. The quality of the evidence was rated as strong (A), moderate (B), limited (C) or based on consensus (D). Finally, eight experts and twenty-four OSH professionals commented on and evaluated the content and the feasibility of the preliminary guideline. For risk assessment we recommend loads heavier than 25 kg always to be considered a risk for LBP while loads less than 3 kg do not pose a risk. For loads between 3–25 kg, risk assessment shall be performed using the Manual handling Assessment Charts (MAC)-Tool or National Institute for Occupational Safety and Health (NIOSH) lifting equation. Effective work oriented interventions are patient lifting devices (Level A) and lifting devices for goods (Level C), optimizing working height (Level A) and reducing load mass (Level C). Ineffective work oriented preventive measures are regulations to ban lifting without proper alternatives (Level D). We do not recommend worker-oriented interventions but consider personal lift assist devices as promising (Level C). Ineffective worker-oriented preventive measures are training in lifting technique (Level A), use of back-belts (Level A) and pre-employment medical examinations (Level A). This multidisciplinary evidence-based practice guideline gives clear criteria whether an employee is at risk for LBP while lifting and provides an easy-reference for (in)effective risk reduction measures based on scientific evidence, experience, and consensus among OSH experts and practitioners. PMID:24999432

  7. Paternal occupation and anencephaly

    Microsoft Academic Search

    J. D. Brender; L. Suarez

    1990-01-01

    It has been suggested that paternal occupational exposures to pesticides and solvents increase the risk of neural tube defects in offspring. With the use of Texas livebirth, fetal death, and linked livebirth-death records, the authors conducted a population-based case-control study among 1981-1986 Texas births to examine the association between paternal occupation and anencephalic births. Fathers employed in occupations associated with

  8. Occupational lung cancer

    SciTech Connect

    Cone, J.E.

    1987-04-01

    The author addresses the attribution of lung cancer to cigarette smoking and the problems of confounding synergistic effects of occupational and other carcinogenic risk factors, as well as the divergent trends of declining smoking rates and increasing rates of lung cancer. He also reviews the existing literature to document associations between lung cancer and occupational exposures. Finally, interventions for prevention of occupational lung cancer are discussed.

  9. Short communication Qualitatively different modes of manual lifting

    Microsoft Academic Search

    Robin Burgess-Limerick; Bruce Abernethy

    The question of whether qualitatively different modes of manual lifting exist is addressed via an ideographic analysis of data from an experiment in which 39 subjects lifted loads of varying mass. Angular motion in the sagittal plane of ankle, knee, hip, and lumbar vertebral joints was estimated from video images collected while each subject performed 100 lifts. Bimodality in the

  10. Lifted Online Training of Relational Models with Stochastic Gradient Methods

    E-print Network

    Kersting, Kristian

    the benefits of lifting for training. Moreover, in relational learning we often face a single mega-example [5Lifted Online Training of Relational Models with Stochastic Gradient Methods Babak Ahmadi1 Forest University, School of Medicine, Winston-Salem, USA Abstract. Lifted inference approaches have

  11. Fast face detection by lifting dyadic wavelet filters

    Microsoft Academic Search

    Turghunjan Abdukirim; Koichi Niijima; Shigeru Takano

    2003-01-01

    This paper presents a fast algorithm for detectingfacial parts such as nose, eyes and lips in an image by using lifting dyadic wavelet filters. Free parameters in the lifting filters are learned so as to maximize the cosine of an angle be- tween a vector whose components are the lifting filters and a vector of pixels in the facial part.

  12. Comparing the results of five lifting analysis tools

    Microsoft Academic Search

    Steven J. Russell; Lori Winnemuller; Janice E. Camp; Peter W. Johnson

    2007-01-01

    The objective of this study was to compare the results of the NIOSH, ACGIH TLV, Snook, 3DSSPP and WA L&I lifting assessment instruments when applied to a uniform task (lifting and lowering milk cases with capacities of 15 and 23l). To enable comparisons between the various lifting assessment instruments, the outputs of each method were converted to an exposure index

  13. Teacher's Guide to Occupational Orientation.

    ERIC Educational Resources Information Center

    National Evaluation Systems, Inc., Amherst, MA.

    This guide is specifically designed to accompany materials developed for occupational orientation (particularly in Illinois) in the following five cluster areas: Applied biological and agricultural occupations; personal and public service occupations; health occupations; business, marketing, and management occupations; and industrial oriented…

  14. Lifting over an obstacle: effects of one-handed lifting and hand support on trunk kinematics and low back loading

    Microsoft Academic Search

    Idsart Kingma; Jaap H. van Dieën

    2004-01-01

    Mechanical loading of the low back during lifting is a common cause of low back pain. In this study two-handed lifting is compared to one-handed lifting (with and without supporting the upper body with the free hand) while lifting over an obstacle. A 3-D linked segment model was combined with an EMG-assisted trunk muscle model to quantify kinematics and joint

  15. Liposuction-Assisted Medial Thigh Lift in Obese and Non Obese Patients

    PubMed Central

    Aboueldahab, Abdelmohsen Khalaf

    2013-01-01

    Introduction: The abdomen, thighs and buttocks are often the areas of greatest concern to patients following massive weight loss due to bariatric surgery. The typical appearance of the patient who has lost a massive amount of weight derives from a combination of factors, including gender-dependent body morphology and a change in body mass index, which lead to skin and soft-tissue excess and poor skin tone. Thigh laxity and redundancy represents a great challenge to both patients and surgeons. Not only because of the difficulty to satisfy the patients, but also due to the higher incidence of complications especially, with those obese patients who have not undergone bariatric surgery before. The problems with such patients are due to the heavy thighs that require both debulking and tight anchorage to prevent scar migration or labial distortion. Aim of the Work: The aim of the present study is to improve the aesthetic outcome and avoid the complications of medial thigh lifting with simultaneous liposuction in obese and non-obese. Patients and Methods: A total of 25 female patients presented during the period from January 2007 to July 2011 complaining of moderate to severe thigh laxity with or without lipodystrophy. In 20 patients medial transverse thigh lift was performed, to treat medial thigh friction and laxity particularly in the upper half. Whereas, in the other five patients were suffering from upper and lower medial thigh bulkiness, vertical thigh lift was performed. Results: All patients recovered well in 2 weeks and showed improvement of thigh contour. Scar downward displacement in one patient. No skin necrosis or seroma. No labial distortion or separation encountered. Conclusion: Simultaneous liposuction and thigh lift gave good results provided proper patients selection, appropriate technique to each patient, meticulous, cautious liposuction and handling of the tissues and most importantly is the deep tight anchorage sutures to guard against the effect of heavy skin flaps. PMID:24470720

  16. Does an asymmetric straddle-legged lifting movement reduce the low-back load?

    Microsoft Academic Search

    Michiel P. de Looze; Patricia Dolan; Idsart Kingma; Chris T. M. Baten

    1998-01-01

    Asymmetric lifting with one foot placed at the side of the load and the other behind it (straddle lift) might result in lower back loads than symmetric lifting. A detrimental effect on low back load might also occur due to the body asymmetry. The low back load in a symmetric back lift, leg lift and free lift and a straddle

  17. Occupations, U. S. A.

    ERIC Educational Resources Information Center

    Geneva Area City Schools, OH.

    The booklet divides job titles, selected from the Dictionary of Occupational Titles, into 15 career clusters: agribusiness and natural resources, business and office education, communication and media, construction, consumer and home economics, fine arts and humanities, health occupations, hospitality and recreation, manufacturing, marine science,…

  18. The Heath Occupational Model.

    ERIC Educational Resources Information Center

    Heath, William E.

    1990-01-01

    Career development programs must identify occupational needs of adults. A model based on Maslow's hierarchy develops occupational questions related to individual motivations (physiology, safety, love, esteem, and self-actualization). Individual needs are then compared with characteristics and benefits of proposed jobs, companies, or careers. (SK)

  19. Metropolitan Occupational Medicine

    E-print Network

    Emmons, Scott

    Metropolitan Occupational Medicine Conference October 18-19, 2014 New Brunswick, NJ Travel, lodging! The New York State Occupational and Environmental Medicine Association (NYOEMA) is joining with its sister medicine. To encourage medical students and residents to explore this field more thoroughly, NYOEMA

  20. Compensation for occupational cancer.

    PubMed

    Kim, Inah; Kim, Eun-A; Kim, Jae Young

    2014-06-01

    The legal scope and criteria for occupational cancer in Korea was out of date. The aim of this study was to review the current criteria for occupational cancer and amend the existent criteria on the basis of recent scientific evidence. The scientific evidence and the legal list of occupational cancer were analyzed to identify the causes of occupational cancer on a global scale. The relationship between compensated occupational cancer cases and carcinogen exposure in Korea was examined. The factors associated with specific causes and target cancers were determined to produce additional criteria. Five-hundred and nineteen cases of 2,468 were awarded compensation for occupational cancer including lung, malignant mesothelioma, lymphohematopoietic, and liver cancers from January 2000 to October 2012. Between 1996 and 2005, benzene accounted for 84.4% of cases, and between 1999 and 2005, asbestos was associated with 62.3% of cases. Fourteen novel causative agents and 12 additional target cancers were identified and the final guidelines were amended to include 23 causative agents and 21 target cancers. This amendment of the criteria for occupational cancer represents the widest change in Korean history and is expected to improve the understanding of occupational cancer by providing an up-to-date and accurate reference guide. PMID:25006323

  1. Bricklayer. Occupational Analyses Series.

    ERIC Educational Resources Information Center

    Cap, Orest; Cap, Ihor; Semenovych, Viktor

    This analysis covers tasks performed by a bricklayer, an occupational title some provinces and territories of Canada have also identified as bricklayer-mason, brick and stone mason, and mason. A guide to analysis discusses development, structure, and validation method; scope of the occupation; trends; and safety. To facilitate understanding the…

  2. Occupational Stress among Teachers.

    ERIC Educational Resources Information Center

    Albertson, Larry M.; Kagan, Dona M.

    1987-01-01

    Two studies were conducted to investigate the degree to which occupational stress among teachers could be attributed to personal characteristics of the individuals themselves. The first study developed dispositional stress scales. The second examined correlations between these scales, occupational stress scales, and teachers' attitudes toward…

  3. Mental Health Occupational Therapy

    Microsoft Academic Search

    Gary Kielhofner; Roann Barris

    1984-01-01

    This article briefly reviews the history of ideas and practice in psychosocial occupational therapy. It then reports the results of two studies which examined present-day perspectives as reflected in occupational therapy literature and the actural practices of psychosocial therapists. The first study was based on a review of mental health-related articles in AJOT and OTMH; the second represented secondary analyses

  4. Canadian Occupational Groups.

    ERIC Educational Resources Information Center

    Conger, D. Stuart

    Based upon the structure of Canadian Classification and Dictionary of Occupations, the volume presents highly condensed descriptions of classification clusters representing the universe of occupational groups in the Canadian economy. It is a useful tool for vocational counselors, students, and clients. Each cluster is assigned a number; the…

  5. OCCUPATION EDUCATION REQUIREMENTS ANALYSIS.

    ERIC Educational Resources Information Center

    GRIEST, JEANNE; MORSCH, WILLIAM C.

    THE OCCUPATIONAL EDUCATION REQUIREMENTS ANALYSIS (OERA) SYSTEM IS A RESEARCH EFFORT DESIGNED TO DEVELOP A FEASIBLE METHOD OF PROJECTING VOCATIONAL EDUCATION REQUIREMENTS THAT WILL SATISFY LABOR MARKET NEEDS. THE OUTPUTS OF THE OERA WILL BE ANNUAL PROJECTIONS OF EMPLOYMENT DEMANDS IN OCCUPATIONS CLASSIFIED BY VOCATIONAL EDUCATION PROGRAMS. THESE…

  6. [Bone substitutes used for sinus lift].

    PubMed

    Kamm, T; Kamm, S; Heppt, W

    2015-07-01

    In dental surgery today a variety of bone substitutes are used for sinus lift. After the increased application of synthetics during the last decade there has now been a move back to autologous bone transplants, combined with allogenic and xenogenic augmentation materials. The effects of transforming growth factors and recombinant equivalents of bone morphogenetic proteins remain to be seen. Covering the augmented area with a collagen membrane is the basic standard in many cases. Concomitant illnesses of dental origin or of the maxillary sinus have to be assessed prior to any sinus lift. Once complications such as laceration of the Schneiderian membrane, infection or adverse reaction have occurred, early and consistent therapy is required. PMID:26156659

  7. Lifting surface theory for rectangular wings

    NASA Technical Reports Server (NTRS)

    Dejarnette, F. R.

    1976-01-01

    A new incompressible lifting-surface theory is developed for thin rectangular wings. The solution requires the downwash equation to be in the form of Cauchy-type integrals. Lan's method is employed for the chordwise integrals since it properly accounts for the leading-edge singularity, Cauchy singularity and Kutta condition. The Cauchy singularity in the spanwise integral is also accounted for by using the midpoint trapezoidal rule and theory of Chebychev polynomials. The resulting matrix equation, formed by satisfying the boundary condition at control points, is simpler and quicker to compute than other lifting surface theories. Solutions were found to converge with only a small number of control points and to compare favorably with results from other methods.

  8. Static Thrust Analysis of the Lifting Airscrew

    NASA Technical Reports Server (NTRS)

    Knight, Montgomery; Hefner, Ralph A

    1937-01-01

    This report presents the results of a combined theoretical and experimental investigation conducted at the Georgia School of Technology on the static thrust of the lifting air screw of the type used in modern autogiros and helicopters. The theoretical part of this study is based on Glauert's analysis but certain modifications are made that further clarify and simplify the problem. Of these changes the elimination of the solidity as an independent parameter is the most important. The experimental data were obtained from tests on four rotor models of two, four, and five blades and, in general, agree quite well with the theoretical calculations. The theory indicates a method of evaluating scale effects on lifting air screws, and these corrections have been applied to the model results to derive general full-scale static thrust, torque, and figure-of-merit curves for constant-chord, constant-incidence rotors. Convenient charts are included that enable hovering flight performance to be calculated rapidly.

  9. LIFT Tenant Is Off and Running

    NASA Technical Reports Server (NTRS)

    Steele, Gynelle C.

    2001-01-01

    Lewis Incubator for Technology (LIFT) tenant, Analiza Inc., graduated from the incubator July 2000. Analiza develops technology and products for the early diagnosis of diseases, quality control of bio-pharmaceutical therapeutics, and other applications involving protein analyses. Technology links with NASA from existing and planned work are in areas of microfluidics and laser light scattering. Since their entry in LIFT in May, 1997, Analiza has: Received a $750,000 grant from the National Institutes of Health. Collaborated with a Nobel Prize winner on drug design. Collaborated with Bristol-Myers Squibb on the characterization of biological therapeutics. Added a Ph.D. senior scientist and several technicians. Received significant interest from major pharmaceutical companies about collaborating and acquiring Analiza technology.

  10. What's new in artificial lift; Part 2

    SciTech Connect

    Lea, J.F. (Amoco Production Research, Tulsa, OK (United States)); Winkler, H.W. (Winkler (H.W.), Lubbock, TX (United States))

    1994-04-01

    In the first article of this two-part series, new developments were presented for electrical submersible pumps and accessories, gas lift, and controls and measurement. This concluding article extends the review of artificial lift innovations to include beam pumping and progressive cavity (PC) pumps. Described here are improvements in beam pumping which include advanced sucker rods and pumping units, fluid level instruments, pump-off control (POC) and efficiency monitoring/management systems, pump sand control, surface pollution containment and a shared-motor for multiple wells. For progressive cavity pump improvements, three companies have introduced new rod guides, a modified tubing anchor catcher, round continuous rods, a PC variable frequency drive and a multilobe pump system. And status of a 20-company sponsored project for PC pump improvement is outlined.

  11. [Market oriented occupational medicine].

    PubMed

    Rurik, Imre; Cseh, Károly

    2012-09-01

    The history and the recent state of occupational medicine in Hungary, and its relation with governmental labor organizations are analyzed. In the past 20 years, large "socialist" factories were replaced by smaller companies employing fewer workers. They have been forced to establish contract with occupational health providers. Many of them offer primary care services, whereas family physicians having a board examination in occupational medicine are allowed to work in this field as well. The market of occupational medicine is less regulated, and ethical rules are not always considered. Undercutting prices is a common practice. The recent system could be improved by some regulations which should be respected. There is no reason to make rough changes establishing a new market for profit oriented insurance companies, and to allow employees and employers to work without specification neglecting international agreements. Occupational medicine should be supervised again by the health authorities instead of economists who have quite different, short-term priorities. PMID:22951411

  12. Occupational infection in Korea.

    PubMed

    Chung, Yun Kyung; Ahn, Yeon-Soon; Jeong, Jae Sim

    2010-12-01

    Occupational infection is a human disease caused by work-associated exposure to microbial agents through human and environmental contact. According to the literature, occupational infection was the third leading cause of occupational disease (861 cases, 8.0%), and health care, agricultural, forestry, and fishery workers were risk groups in Korea. In addition, most high-risk groups have not been protected by workers' compensation, which could lead to underestimation of the exact spectrum and magnitude of the problem, and may also result in a lack of development and implementation of occupational infection management. Through a review of national guidelines and documentations on prevention and control of occupational infection, a management strategy would promote adherence to worker safety regulations if it is explicit with regard to the agent and mode of infection in each of the high-risk groups. PMID:21258592

  13. Occupational Noise Exposure among Toll Tellers at Toll Plaza in Malaysia

    Microsoft Academic Search

    Sharifah Nadya Syed Azmi; Tuan Mohammad Yusoff Shah Tuan Ya; Hamidi Saidin

    2010-01-01

    Toll tellers working at toll plaza have potential of exposure to high noise from the vehicles especially for the peak level of sound emitted by the heavy vehicles. However, occupational exposures in this workplace have not been adequately characterized and identified. Occupational noise exposure among toll tellers at toll plaza was assessed using Sound Level Meter, Noise Dosimeter and through

  14. The Skinny on Success: Body Mass, Gender and Occupational Standing Across the Life Course

    Microsoft Academic Search

    Christy M. Glass; Eric N. Reither; Steven A. Haas

    2010-01-01

    :Several studies have analyzed the impact of obesity on occupational standing. This study extends previous research by estimating the influence of body mass on occupational attainment over three decades of the career using data from the Wisconsin Longitudinal Study. In a series of covariance structure analyses, we considered three mechanisms that may alter the career trajectories of heavy individuals: (1.

  15. Lifting asymptotic degeneracies with the Mirror TBA

    E-print Network

    Sfondrini, Alessandro

    2011-01-01

    We describe a qualitative feature of the AdS_5 x S^5 string spectrum which is not captured by the asymptotic Bethe ansatz. This is reflected by an enhanced discrete symmetry in the asymptotic limit, whereby extra energy degeneracy enters the spectrum. We discuss how finite size corrections should lift this degeneracy, through both perturbative (Luscher) and non-perturbative approaches (the Mirror TBA), and illustrate this explicitly on two such asymptotically degenerate states.

  16. Lifting asymptotic degeneracies with the Mirror TBA

    E-print Network

    Alessandro Sfondrini; Stijn J. van Tongeren

    2012-01-18

    We describe a qualitative feature of the AdS_5 x S^5 string spectrum which is not captured by the asymptotic Bethe ansatz. This is reflected by an enhanced discrete symmetry in the asymptotic limit, whereby extra energy degeneracy enters the spectrum. We discuss how finite size corrections should lift this degeneracy, through both perturbative (Luscher) and non-perturbative approaches (the Mirror TBA), and illustrate this explicitly on two such asymptotically degenerate states.

  17. Solutions for small slope pipeline lifting problems

    SciTech Connect

    Hobbs, R.E.

    1984-03-01

    Two classes of submarine pipeline handling problems are considered, namely the lifting of a pipe with a free end for tie-in purposes, and the raising of part of a continuous line for hot-tapping or repair. If pipeline slopes are small (as is usual in seabed work), engineers' beam theory may be used in combination with a NewtonRaphson solution to locate the separation points between pipe and seabed. Key results are presented.

  18. Projection and Lifting in Combinatorial Optimization

    Microsoft Academic Search

    Egon Balas

    2001-01-01

    This is an overview of the significance and main uses of projection and lifting in integer programming and combinatorial optimization.\\u000a Its first four sections deal with those basic properties of projection that make it such an effiective and useful bridge between\\u000a problem formulations in different spaces, i.e. different sets of variables. They discuss topics like the integrality-preserving\\u000a property of projection,

  19. HSCT high lift system aerodynamic requirements

    NASA Technical Reports Server (NTRS)

    Paulson, John A.

    1992-01-01

    The viewgraphs and discussion of high lift system aerodynamic requirements are provided. Low speed aerodynamics has been identified as critical to the successful development of a High Speed Civil Transport (HSCT). The airplane must takeoff and land at a sufficient number of existing or projected airports to be economically viable. At the same time, community noise must be acceptable. Improvements in cruise drag, engine fuel consumption, and structural weight tend to decrease the wing size and thrust required of engines. Decreasing wing size increases the requirements for effective and efficient low speed characteristics. Current design concepts have already been compromised away from better cruise wings for low speed performance. Flap systems have been added to achieve better lift-to-drag ratios for climb and approach and for lower pitch attitudes for liftoff and touchdown. Research to achieve improvements in low speed aerodynamics needs to be focused on areas most likely to have the largest effect on the wing and engine sizing process. It would be desirable to provide enough lift to avoid sizing the airplane for field performance and to still meet the noise requirements. The airworthiness standards developed in 1971 will be the basis for performance requirements for an airplane that will not be critical to the airplane wing and engine size. The lift and drag levels that were required to meet the performance requirements of tentative airworthiness standards established in 1971 and that were important to community noise are identified. Research to improve the low speed aerodynamic characteristics of the HSCT needs to be focused in the areas of performance deficiency and where noise can be reduced. Otherwise, the wing planform, engine cycle, or other parameters for a superior cruising airplane would have to be changed.

  20. LiftingWiSe: a lifting-based efficient data processing technique in wireless sensor networks.

    PubMed

    Aboelela, Emad

    2014-01-01

    Monitoring thousands of objects which are deployed over large-hard-to-reach areas, is an important application of the wireless sensor networks (WSNs). Such an application requires disseminating a large amount of data within the WSN. This data includes, but is not limited to, the object's location and the environment conditions at that location. WSNs require efficient data processing and dissemination processes due to the limited storage, processing power, and energy available in the WSN nodes. The aim of this paper is to propose a data processing technique that can work under constrained storage, processing, and energy resource conditions. The proposed technique utilizes the lifting procedure in processing the disseminated data. Lifting is usually used in discrete wavelet transform (DWT) operations. The proposed technique is referred to as LiftingWiSe, which stands for Lifting-based efficient data processing technique for Wireless Sensor Networks. LiftingWiSe has been tested and compared to other relevant techniques from the literature. The test has been conducted via a simulation of the monitored field and the deployed wireless sensor network nodes. The simulation results have been analyzed and discussed. PMID:25116902

  1. Superficial shoulder muscle co-activations during lifting tasks: Influence of lifting height, weight and phase.

    PubMed

    Blache, Y; Dal Maso, F; Desmoulins, L; Plamondon, A; Begon, M

    2015-04-01

    This study aimed to assess the level of co-activation of the superficial shoulder muscles during lifting movement. Boxes containing three different loads (6, 12, and 18 kg) were lifted by fourteen subjects from the waist to shoulder or eye level. The 3D kinematics and electromyograms of the three deltoids, latissimus dorsi and pectoralis major were recorded. A musculoskeletal model was used to determine direction of the moment arm of these muscles. Finally an index of muscle co-activation named the muscle focus was used to evaluate the effects of lifting height, weight lifted and phase (pulling, lifting and dropping phases) on superficial shoulder muscle coactivation. The muscle focus was lower (more co-contraction) during the dropping phase compared to the two other phases (-13%, p<0.001). This was explained by greater muscle activations and by a change in the direction of the muscle moment arm as a function of glenohumeral joint position. Consequently, the function of the shoulder superficial muscles varied with respect to the glenohumeral joint position. To increase the superficial muscle coactivation during the dropping phase may be a solution to increase glenohumeral joint stiffness. PMID:25483204

  2. [Healthcare occupations are "different"].

    PubMed

    Heubel, F

    2014-08-01

    Healthcare requires careful coordination of several occupations. In order to attain the best possible result, including effectiveness and cost-efficiency, the specific expertise of each of these occupations must be clearly defined. Healthcare occupations, physicians and nurses, are indeed professions as opposed to mere "jobs". They are concerned with living but ill human beings and not with things. Reliance on a personal capacity of judgment is a decisive aspect of professions. Healthcare professionals perform best if they are granted specific independence relative to their work. PMID:24902534

  3. How Occupation Emerges in the Practices of Experienced Occupational Therapists

    Microsoft Academic Search

    Pollie Price

    2006-01-01

    Occupation has reemerged as the central heuristic for occupational therapy practice (AOTA, 2002). However, there is currently little agreement on a definition of occupation-based practice. Some scholars have theorized that occupation-based practice occurs when therapists provide intervention in the individual’s natural context, using the individual’s occupations as therapeutic interventions (Fidler, 2000; Hocking, 2001; Pierce, 2003). Other scholars have empirically demonstrated

  4. Occupational Therapy (For Parents)

    MedlinePLUS

    ... appropriate for that age group. According to the American Occupational Therapy Association (AOTA), in addition to dealing with an someone's physical well-being, OT practitioners address psychological, social, and environmental factors that can affect functioning ...

  5. New and Emerging Occupations.

    ERIC Educational Resources Information Center

    Crosby, Olivia

    2002-01-01

    Discusses how new and emerging occupations develop, why they are hard to identify, what risks and rewards vanguard workers face, and how to find a cutting-edge job. Describes strategies researchers use to identify emerging careers. (JOW)

  6. Paternal occupation and anencephaly

    SciTech Connect

    Brender, J.D.; Suarez, L. (Texas Department of Health, Austin (USA))

    1990-03-01

    It has been suggested that paternal occupational exposures to pesticides and solvents increase the risk of neural tube defects in offspring. With the use of Texas livebirth, fetal death, and linked livebirth-death records, the authors conducted a population-based case-control study among 1981-1986 Texas births to examine the association between paternal occupation and anencephalic births. Fathers employed in occupations associated with solvent exposure were more likely to have offspring with anencephaly (odds ratio (OR) = 2.53), with painters having the highest risk (OR = 3.43). A lesser association was found for fathers employed in occupations involving pesticide exposure (OR = 1.28). Further studies are indicated to clarify these associations.

  7. Occupational health in China.

    PubMed

    Christiani, David C; Tan, Xiaodong; Wang, Xiaorong

    2002-01-01

    China has been experiencing rapid industrialization and economic growth, resulting in a transformed industrial structure and expansion of the labor force. Occupational health and safety services, nonexistent before 1949, have made remarkable advances over the past decades. However, these services face greater challenges, consisting of both traditional and new occupational health problems. Poorly regulated work environments often lacking health services in recently developed and thriving small-scale industries and joint venture enterprises have created increasing risks for occupational diseases and work-related injuries. A special strategy based on cooperation among and contributions from the legal, administrative, social, economic, and scientific communities is critical to achieving the ultimate goal of control and prevention of these occupational health problems. PMID:12028948

  8. Occupational Analysis and Training.

    ERIC Educational Resources Information Center

    Shears, Arthur E.

    1985-01-01

    A form of occupational analysis called DACUM (Developing a Curriculum) and its advantages in course development and performance assessment are discussed and specific suggestions on conducting a DACUM session are provided. (CT)

  9. Occupational lung cancer

    Microsoft Academic Search

    D. B. Coultas; J. M. Samet

    1992-01-01

    The overall importance of occupational agents as a cause of lung cancer has been a controversial subject since the 1970s. A federal report, released in the late 1970s, projected a surprisingly high burden of occupational lung cancer; for asbestos and four other agents, from 61,000 to 98,000 cases annually were attributed to these agents alone. Many estimates followed, some much

  10. Occupational Contact Dermatitis: Hairdressers

    Microsoft Academic Search

    Heidi Søsted

    \\u000a Occupational contact dermatitis occurs in about half of all hairdressers and makes hairdressers susceptible to most skin diseases.\\u000a The clinical manifestations are typically seen as hand eczema. The hand eczema starts often at the time of hairdressing apprenticeship,\\u000a and protective gloves are very important for preventing eczema in this occupation. Persulfates are (almost) always used in\\u000a bleaching procedures in hairdressing

  11. Lift Enhancement by Dynamically Changing Wingspan in Forward Flapping Flight

    E-print Network

    Wang, Shizhao; He, Guowei; Liu, Tianshu

    2013-01-01

    Stretching and retracting wingspan has been widely observed in the flight of birds and bats, and its effects on the aerodynamic performance particularly lift generation are intriguing. The rectangular flat-plate flapping wing with a sinusoidally stretching and retracting wingspan is proposed as a simple model of biologically-inspired dynamic morphing wings. Direct numerical simulations of the low-Reynolds-number flows around the flapping morphing wing in a parametric space are conducted by using immersed boundary method. It is found that the instantaneous and time-averaged lift coefficients of the wing can be significantly enhanced by dynamically changing wingspan in a flapping cycle. The lift enhancement is caused not only by changing the lifting surface area, but also manipulating the flow structures that are responsible to the generation of the vortex lift. The physical mechanisms behind the lift enhancement are explored by examining the three-dimensional flow structures around the flapping wing.

  12. Selection criteria for preparatory object rotation in manual lifting actions.

    PubMed

    Chang, Lillian Y; Klatzky, Roberta L; Pollard, Nancy S

    2010-01-01

    Participants lifted a canister by its handle while balancing a ball on the lid. Experiment 1 allowed object rotation prior to lifting. A lifting comfort zone was measured by the variability in object orientation at lift; its size depended on the object mass and required task precision. The amount of prelift rotation correlated with the resulting change in lifting capability, as measured for different object orientations. Experiment 2 required direct grasping without preparatory rotation. Task completion time and success rate decreased, and initial object orientation affected prelift time. Results suggest that lifting from the comfort zone produces more robust performance at a cost of slower completion; moreover, physical rotation could be replaced by mental planning when direct grasping is enforced. PMID:19906635

  13. Occupational cancer in Spain.

    PubMed Central

    González, C A; Agudo, A

    1999-01-01

    The knowledge of specific problems of occupational cancer in Spain is scarce. The environment of the workplace has improved over the last few years after a long period distinguished by bad working conditions, incomplete legislation, and insufficient safety measures and control. It has been estimated that 3,083,479 workers (25.4% of employees) were exposed to carcinogens. The most common occupational exposures to carcinogenic agents were solar radiation, environmental tobacco smoke, silica, and wood dust. The highest number of employees were exposed to silica crystalline (404,729), diesel engine exhaust (274,321), rubber products (99,804), benzene (89,932), ethylene dibromide (81,336), agents used in furniture and cabinet making (72,068), and formaldehyde (71,189). The percentage of total cancer deaths attributed to occupational exposure was 4% (6% in men, 0.9% in women). Compared with other European countries, the incidence of lung cancer and leukemia in Spain are one of the lowest, but it is rapidly increasing. The incidence of urinary bladder and larynx cancer, on the contrary, are one of the highest. Few studies on occupational cancer have been conducted in Spain. The main problems are the availability of death certificates and the quality of the information on occupation in mortality of statistics. It is necessary to improve methods of assessment of exposures using expert hygienists and biologic markers of exposure and diseases. Reduction of cancer by limiting or avoiding exposure to known occupational carcinogens is still necessary. PMID:10350510

  14. Lifting flat directions in lattice supersymmetry

    E-print Network

    Catterall, Simon

    2015-01-01

    We present a procedure to improve the lattice definition of $\\mathcal N = 4$ supersymmetric Yang--Mills theory. The lattice construction necessarily involves U(1) flat directions, and we show how these can be lifted without violating the exact lattice supersymmetry. The basic idea is to modify the equations of motion of an auxiliary field, which determine the moduli space of the system. Applied to numerical calculations, the resulting improved lattice action leads to dramatically reduced violations of supersymmetric Ward identities and much more rapid approach to the continuum limit.

  15. Transonic Lifting Flows of Pressurized Gases

    NASA Astrophysics Data System (ADS)

    Cramer, Mark; Morrison, Michael

    1997-11-01

    We consider two-dimensional, steady, inviscid transonic flows of pressurized gases over both lifting and nonlifting airfoils. To account for deviations from the ideal gas law we have incorporated a state of the art equation of state known as the Martin-Hou equation. Numerical Solutions are generated through use of a conventional finite volume scheme. Our computations reveal marked qualitative differences with the conventional transonic theory. Result of particular interest include the existence of multiple sonic points, significant decreases in the strength of compression shocks and critical mach numbers well in excess of 0.95 for NACA 0012 cross sections.

  16. Deep plane face lifting for midface rejuvenation.

    PubMed

    Gordon, Neil A; Adam, Stewart I

    2015-01-01

    The deep-plane midface lift offers many advantages in midface rejuvenation. Anatomic analysis of aging and embryologic evidence both support surgical facial “degloving” in the sub-SMAS plane and resuspension of the platysma/SMAS unit. This approach offers more complete repositioning of facial soft tissue compared with nonsurgical techniques, delivering accurate, direct treatment of deeper anatomic aspects of facial aging. The well-vascularized deep-plane flap minimizes complications. Outcomes can be maximized because tension exists “invisibly,” only at the fascia level. Consistent, natural,and long-lasting aesthetic results are achieved. PMID:25440750

  17. Discovery is lifted in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    The orbiter Discovery is nearly vertical as overhead cranes lift it in the transfer aisle of the Vehicle Assembly Building. It will then be moved into high bay 1 for mating with its solid rocket boosters and external tank. Discovery will be launched March 8 on mission STS-102, the eighth construction flight to the International Space Station. The Shuttle will carry the Multi- Purpose Logistics Module Leonardo, the first of three pressurized modules provided by the Italian Space Agency to carry supplies and equipment to the Space Station and back to earth.

  18. Discovery is lifted in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    The orbiter Discovery finally hangs vertically, suspended from overhead cranes in the transfer aisle of the Vehicle Assembly Building. It will next be lifted into high bay 1 for mating with its solid rocket boosters and external tank. Discovery will be launched March 8 on mission STS-102, the eighth construction flight to the International Space Station. The Shuttle will carry the Multi-Purpose Logistics Module Leonardo, the first of three pressurized modules provided by the Italian Space Agency to carry supplies and equipment to the Space Station and back to Earth.

  19. Discovery is lifted in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    In the transfer aisle of the Vehicle Assembly Building, the orbiter Discovery is lifted for mating. It will be moved into high bay 1 and mated with its solid rocket boosters and external tank. Discovery will be launched March 8 on mission STS-102, the eighth construction flight to the International Space Station. The Shuttle will carry the Multi-Purpose Logistics Module Leonardo, the first of three pressurized modules provided by the Italian Space Agency to carry supplies and equipment to the Space Station and back to earth.

  20. Orbital Emphysema Occurring During Weight Lifting.

    PubMed

    Ozdemir, Ozdemir

    2014-01-29

    Abstract Although orbital emphysema is a recognized complication of orbital fractures involving any of the paranasal sinuses, it may develop without any fracture. A 23-year-old man presented with sudden left periorbital swelling during weight lifting in a fitness facility. On the left side, there was periorbital swelling with crepitus in palpation of subcutaneous tissue and conjunctival congestion. Computed tomography showed no fractures in the orbit. The patient was hospitalized. He was treated with empiric antibiotics and non-steroidal antiinflammatory drugs. In three days, the swelling and crepitus had almost disappeared. Seven days later, orbital emphysema had completely resolved. PMID:24475915

  1. Optimization of Bilayer Lift-Off Resist Process

    Microsoft Academic Search

    Jeremy Golden; Harris Miller; Dan Nawrocki; Jack Ross

    2009-01-01

    Bi-layer lift-off metallization techniques offer significant advantages in resolution, removal, process simplicity, undercut control and yield over conventional single-layer lift-off processes. Because of its ease of application, long shelf life and lower tool cost, the polydimethylglutarimide (PMGI) bi-layer process has become an attractive method for the metallization of III-V compound semiconductor devices. The LOR\\/PMGI bi- layer lifts-off cleanly when fabricating

  2. What`s new in artificial lift. Part 2

    SciTech Connect

    Lea, J.F. [Amoco Production Research, Tulsa, OK (United States); Winkler, H.W. [Texas Tech Univ., Lubbock, TX (United States)

    1997-04-01

    Part 1 overviewed 14 new developments for sucker rod and progressing cavity pumping, and gas lift. Described here are several recently announced and/or applied innovations from three major suppliers of electrical submersible pumps (ESPs). Also presented are four other new developments related directly to artificial lift operations. The latter include: coiled tubing plunger lift equipment, an AC motor power controller, a new acoustic liquid level instrument and performance analyzer, and a gearmotor surface drive for PCPs.

  3. Psychiatrists' Perceptions of Occupational Therapy

    Microsoft Academic Search

    Jessica Schnoes Pottebaum; Amy Svinarich

    2005-01-01

    Objective: This study investigated the relationship of psychiatrists' knowledge about occupational therapy and the number of referrals to occupational therapy.Method: Thirty-four psychiatrists in the Omaha area were surveyed about their knowledge of occupational therapy and the number of referrals they write for occupational therapy services.Results: A positive relationship was found between the lack of knowledge regarding occupational therapy and the

  4. Occup Environ Med . Author manuscript Occupational asthma and occupational rhinitis: the united airways disease

    E-print Network

    Boyer, Edmond

    national occupational disease surveillance and­ prevention network, using a standardized form includingOccup Environ Med . Author manuscript Page /1 8 Occupational asthma and occupational rhinitis: the united airways disease model revisited Jacques Ameille 1 2 * , Karine Hamelin 2 , Pascal Andujar 3

  5. 77 FR 20558 - Federal Motor Vehicle Safety Standards; Platform Lifts for Motor Vehicles; Platform Lift...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-05

    ...are designed to carry standing passengers, who may...as persons seated in wheelchairs, scooters, and other...any portion of the wheelchair test device with the...lift designed to carry standing passengers who may...as persons seated in wheelchairs, scooters, and...

  6. Steady lifting surface theory with a free surface

    NASA Astrophysics Data System (ADS)

    Leclerc, J.; Salauen, P.

    1985-11-01

    Steady lifting surface theory with a free surface is developed by an integral equation method. The local lift coefficient appears as a solution to an integral equation of the first kind whose kernel, deduced from a Havelock source potential, is expanded in a Fourier series with respect to the azimuth angle. The coefficients of this series are definite integrals. The method of steepest descents gives asymptotic approximations to coefficients of large index terms, and the remainder can be evaluated approximately in all cases. Numerical applications such as the calculation of the lift and drag for a lifting wing, and the hydrodynamic pressures arising from the turn of a ship are given.

  7. Method for calculating lift distributions for unswept wings with flaps or ailerons by use of nonlinear section lift data

    NASA Technical Reports Server (NTRS)

    Sivells, James C; Westrick, Gertrude C

    1952-01-01

    A method is presented which allows the use of nonlinear section lift data in the calculation of the spanwise lift distribution of unswept wings with flaps or ailerons. This method is based upon lifting line theory and is an extension to the method described in NACA rep. 865. The mathematical treatment of the discontinuity in absolute angle of attack at the end of the flap or aileron involves the use of a correction factor which accounts for the inability of a limited trigonometric series to represent adequately the spanwise lift distribution. A treatment of the apparent discontinuity in maximum section lift coefficient is also described. Simplified computing forms containing detailed examples are given for both symmetrical and asymmetrical lift distributions. A few comparisons of calculated characteristics with those obtained experimentally are also presented.

  8. Lift Every Voice: Music in American Life

    NSDL National Science Digital Library

    2001-01-01

    The University of Virginia Library is hosting a special exhibition called Lift Every Voice, named after a hymn composed by two African-American brothers in the days of the Jim Crow South and aiming to inspire the struggle for equal rights. The Lift Every Voice exhibition commemorates and celebrates a variety of songs that were a part of everyday American life through the centuries. No time to visit Virginia? Then visit the exhibition's Website and enjoy reading about the history behind our country's ballads, hymns, patriotic anthems, minstrels, musicals, and protest songs while listening to audio clips of selected songs (QuickTime, MP3). The text is enriched by digital images of historical papers, compiled by Virginia's Albert H. Small Special Collections Library, including musical scores, photos of musicians, and printed lyrics. The site also contains a section on Thomas Jefferson's relationship to music in the Old South, with digital images of texts from Jefferson's library and, of course, a sample of "Carry Me Back to Old Virginny."

  9. Lift-based paddling in diving grebe.

    PubMed

    Johansson, L C; Lindhe Norberg, U M

    2001-05-01

    To examine the hydrodynamic propulsion mechanism of a diving great crested grebe (Podiceps cristatus), the three-dimensional kinematics was determined by digital analysis of sequential video images of dorsal and lateral views. During the acceleration phase of this foot-propelled bird, the feet move through an arc in a plane nearly normal to the bird's line of motion through the water, i.e. the toes move dorsally and medially but not caudally relative to the water. The kinematics of the grebe's lobed feet is different from that in anseriforms, whose feet move in a plane mostly parallel to the bird's line of progress through the water. Our results suggest that the foot-propelled locomotor mechanism of grebes is based primarily on a lift-producing leg and foot stroke, in contrast to the drag-based locomotion assumed previously. We suggest that the lift-based paddling of grebes considerably increases both maximum swimming speed and energetic efficiency over drag-based propulsion. Furthermore, the results implicate a new interpretation of the functional morphology of these birds, with the toes serving as a self-stabilizing multi-slotted hydrofoil during the power phase. PMID:11316488

  10. Occupational requirements as compared to worker capabilities with respect to total weight lifted per day 

    E-print Network

    Narvaez, Angela Marae

    1998-01-01

    diagnosed with hypertension (i. e. systolic blood pressure &160mmHg or diastolic blood pressure &90mmHg on two separate occasions) or on antihypertensive medication. b) Those diagnosed with high serum cholesterol (&&40 mVdl). c) Cigarette smoking d...

  11. AFC-Enabled Simplified High-Lift System Integration Study

    NASA Technical Reports Server (NTRS)

    Hartwich, Peter M.; Dickey, Eric D.; Sclafani, Anthony J.; Camacho, Peter; Gonzales, Antonio B.; Lawson, Edward L.; Mairs, Ron Y.; Shmilovich, Arvin

    2014-01-01

    The primary objective of this trade study report is to explore the potential of using Active Flow Control (AFC) for achieving lighter and mechanically simpler high-lift systems for transonic commercial transport aircraft. This assessment was conducted in four steps. First, based on the Common Research Model (CRM) outer mold line (OML) definition, two high-lift concepts were developed. One concept, representative of current production-type commercial transonic transports, features leading edge slats and slotted trailing edge flaps with Fowler motion. The other CRM-based design relies on drooped leading edges and simply hinged trailing edge flaps for high-lift generation. The relative high-lift performance of these two high-lift CRM variants is established using Computational Fluid Dynamics (CFD) solutions to the Reynolds-Averaged Navier-Stokes (RANS) equations for steady flow. These CFD assessments identify the high-lift performance that needs to be recovered through AFC to have the CRM variant with the lighter and mechanically simpler high-lift system match the performance of the conventional high-lift system. Conceptual design integration studies for the AFC-enhanced high-lift systems were conducted with a NASA Environmentally Responsible Aircraft (ERA) reference configuration, the so-called ERA-0003 concept. These design trades identify AFC performance targets that need to be met to produce economically feasible ERA-0003-like concepts with lighter and mechanically simpler high-lift designs that match the performance of conventional high-lift systems. Finally, technical challenges are identified associated with the application of AFC-enabled highlift systems to modern transonic commercial transports for future technology maturation efforts.

  12. Occupational health in Argentina.

    PubMed

    Werner, A F

    2000-07-01

    Argentina is within the denominated "new industrialised countries", with the characteristic of having high contrasts in the urban population, based on service and industry, and in the rural population, based on agriculture and cattle, still the main sources of wealth in the country. The process of globalisation and the need to compete hard in international markets have provoked high unemployment and the transfer of workers from a formal market to an informal one. Legislation on occupational health is old and it is in the process of being updated. The system of prevention, assistance and compensation for accidents at work and for occupational illnesses has changed from being optative for employers, to the compulsory hiring of private insurance companies. The Government keeps the role of supervisor of the system. There are enough professionals in occupational health, hygiene and safety but not occupational nurses. The teaching is given by many universities and professional associations, some of which have an active profile in the occupational health of the country. PMID:10963410

  13. Occupational health in the Negev: A model for regional planning

    SciTech Connect

    Blanc, P.D. (Ben Gurion Univ. of the Negev, Beer Sheva (Israel))

    1989-01-01

    In the Negev region of Israel, I tested a model approach to occupational health planning. This model included components assessing exposures, measuring adverse health outcomes, and evaluating health services. I analyzed employment survey data, compiled an exposure data base, and carried out site visits covering 10,707 employees (over 50% of the regional industrial work force). Site visits identified exposure hazards of inorganic and organic dusts, heavy metals, chemicals, pesticides, and noise. I identified elevated relative regional injury rates by Standard Morbidity Ratios (SMRs) in a variety of industries, including sixfold increases for mining and non-metallic minerals manufacture (SMR 6.8, 99% CI 6.1-7.7). Review of biological monitoring data suggested deficiencies in pesticide and heavy metals surveillance. A survey of primary care clinics estimated 13,707 cases of occupational injury and illness untreated by existing occupational medical services. Based on these findings, I formulated regional occupational health planning goals, including targeting high-risk industries for increased preventive activities. This regional approach, combining multiple measures of occupational health status, can serve as a model for assessing local public health planning needs.

  14. Occupational Cohort Time Scales

    PubMed Central

    Roth, H. Daniel

    2015-01-01

    Purpose: This study explores how highly correlated time variables (occupational cohort time scales) contribute to confounding and ambiguity of interpretation. Methods: Occupational cohort time scales were identified and organized through simple equations of three time scales (relational triads) and the connections between these triads (time scale web). The behavior of the time scales was examined when constraints were imposed on variable ranges and interrelationships. Results: Constraints on a time scale in a triad create high correlations between the other two time scales. These correlations combine with the connections between relational triads to produce association paths. High correlation between time scales leads to ambiguity of interpretation. Conclusions: Understanding the properties of occupational cohort time scales, their relational triads, and the time scale web is helpful in understanding the origins of otherwise obscure confounding bias and ambiguity of interpretation. PMID:25647318

  15. Occupation and gastric cancer

    PubMed Central

    Raj, A; Mayberry, J; Podas, T

    2003-01-01

    Gastric cancer is a cause of significant morbidity and mortality. There are several risk factors, with occupation emerging as one of these. There is considerable evidence that occupations in coal and tin mining, metal processing, particularly steel and iron, and rubber manufacturing industries lead to an increased risk of gastric cancer. Other "dusty" occupations—for example, wood processing, or work in high temperature environments have also been implicated but the evidence is not strong. The mechanism of pathogenesis of gastric cancer is unclear and the identification of causative agents can be difficult. Dust is thought to be a contributor to the pathological process, but well known carcinogens such as N-nitroso compounds have been detected in some environments. Further research on responsible agents is necessary and screening for detection of precursor gastric cancer lesions at the workplace merits consideration. PMID:12782770

  16. Tapping into social resources to address occupational health : a network analysis of Vietnamese-owned nail salons

    E-print Network

    Doan, Tam Minh-Thi, 1976-

    2004-01-01

    Social networks in the Vietnamese nail salon industry were studied for their utility in addressing occupational health risks. Major findings include heavy reliance on family networks for fundamental needs, an extensive ...

  17. Optimization of the lithographic performance for lift-off processing

    NASA Astrophysics Data System (ADS)

    Yin, Wenyan; Fillmore, Ward; Dempsey, Kevin J.

    1999-06-01

    Shipley MICROPOSIT LOL lift-off technology exploits a develop rate difference in a resist, LOL1000 bi-layer system to generate retrograde profiles. This is an enabling technology for 'additive' processing. Deposition follows lithography and the resist is then 'lifted off' to generate a patterned layer.

  18. FORK-LIFT TRUCK SIMULATOR FOR TRAINING IN INDUSTRIAL ENVIRONMENT

    Microsoft Academic Search

    Massimo Bergamasco; S. Perotti; Carlo Alberto Avizzano; Marcello Angerilli; Marcello Carrozzino; Emanuele Ruffaldi

    2005-01-01

    Since their first usage simulators have been employed in training staff in civil aeronautics and in military fields to improve driving skills without compromising safety of people and machineries. This paper will present an innovative fork-lift simulator, suited for training in industrial environments. Actually most frequent causes of accident with fork-lifts are due to wrong manoeuvres accomplished by drivers. This

  19. Lifting scheme and image coding: average interpolating image coding

    Microsoft Academic Search

    Zeng Jianfen; Ma Zhengming

    2001-01-01

    A lifting scheme, from new wavelet research, can be used to implement the existing wavelets and to construct completely new wavelets. We construct the average interpolating wavelet of 2 degree and apply it to image coding; finally, we get an image coding result as good as, if not better than, that of the D9\\/7 recommended by JPEG2000 draft. The lifting

  20. HSR high lift research program: Status and plans

    NASA Technical Reports Server (NTRS)

    Rose, Jim

    1992-01-01

    The viewgraphs for a report on the status and plans for High Speed Research (HSR) programs are provided. Benefits of improved high lift performance are listed. The objectives, approach, and experimental results are outlined. Future experimental tests and additional research opportunities are listed. The use of computational fluid dynamics (CFD) in high lift research is also outlined.

  1. Assessment of the sinus lift operation by magnetic resonance imaging

    Microsoft Academic Search

    C. F. Gray; T. W. Redpath; F. W. Smith; R. Bainton

    1999-01-01

    Sinus lift operations are done to increase bone thickness before placement of osseointegrated implants in areas of the maxilla where there is insufficient bone between the lower border of the maxillary sinus mucosa and the oral mucoperiosteum. Full sectional information should be available to the surgeon before the sinus lift operation so that the outcome can be predicted, and to

  2. Lifting surface theory for a helicopter rotor in forward flight

    NASA Technical Reports Server (NTRS)

    Runyan, H. L.; Tai, H.

    1983-01-01

    A lifting surface theory has been developed for a helicopter rotor in forward flight for incompressible flow. The method utilized the concept of the linearized acceleration potential and make use of the vortex lattice procedures. Results in terms of lift coefficient slope for several forward flight conditions are given.

  3. Status of LaRC HSCT high-lift research

    NASA Technical Reports Server (NTRS)

    Coe, Paul L.

    1992-01-01

    The viewgraphs for a status report of the NASA Langley Reseach Center High Speed Civil Transport (HSCT) High-Lift Research Program are provided. A listing of available models and previous wind tunnel studies are presented. Objectives and approach of the piloted simulation program are given. The HSCT High-Lift Research plans are listed and briefly described.

  4. Redundant Lifted Fast Wavelet Transform for Signal Compression

    Microsoft Academic Search

    Deqiang Li; Shaowei Guo; Zelin Shi

    2006-01-01

    Lifting wavelet is regarded as the second generation wavelet due to its specific priorities, such as custom-design properties, in-place computation, etc. lifted fast wavelet transform (LFWT) is capable for signal compression, but it is sensitive to signal shift as well as the classical fast wavelet transform (FWT). To LFWT, different circulant shift on the original signal always results in the

  5. Department of Geoscience Safe Work Instructions SAFE LIFTING PROCEDURES

    E-print Network

    Habib, Ayman

    Injury Preserve your back health by using the following lifting strategies: 1. Before lifting a load, position your feet about shoulder width apart with one foot slightly ahead of the other. 5. Squat, keeping back. Remember to Turn, don't Twist. Twisting is the most common cause of back injury. 11. Set the load

  6. Barbell-Lifting Based 3-D Wavelet Coding Scheme

    Microsoft Academic Search

    Ruiqin Xiong; Jizheng Xu; Feng Wu; Shipeng Li

    2007-01-01

    This paper provides an overview of the Barbell lifting coding scheme that has been adopted as common software by the MPEG ad hoc group on further exploration of wavelet video coding. The core techniques used in this scheme, such as Barbell lifting, layered motion coding, 3D entropy coding and base layer embedding, are discussed. The paper also analyzes and compares

  7. Atlantis is lifted from its transporter in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    KENNEDY SPACE CENTER, Fla. -- This closeup shows the workers, standing on lifts, who are checking the bolts on the apparatus holding the orbiter Atlantis. The orbiter will be rotated and lifted into high bay 1 where it will be stacked with its external tank and solid rocket boosters. Space Shuttle Atlantis is scheduled to launch on mission STS-104 in early July.

  8. Circulation methods for lift measurement in an unsteady aerodynamic flow

    NASA Astrophysics Data System (ADS)

    Yuan, Jiankun; Olinger, David J.

    2001-11-01

    Recently an ultrasonic circulation measurement technique has been developed to determine mean lift on various aerodynamic bodies, including airfoils and delta wings^1. The ultrasonic method is based on measuring transit times of acoustic pulses along paths enclosing the aerodynamic body. In the present work, the largely unstudied extension of the ultrasonic technique to determine instantaneous lift in unsteady flows is addressed. An analytical method, based on unsteady potential flow theory, is developed which properly converts the instantaneous bound circulation measured in the ultrasonic technique to instantaneous lift. The analytical method is validated using a finite element solution of flow over an oscillating flat plate at low angle of attack and Reynolds number = 100. The bound circulation within an enclosed acoustic path is determined from the numerical simulation and converted to instantaneous lift via the developed method. Comparing these values to instantaneous lift values determined from integration of the surface pressure distribution shows that the developed method provides improved results compared to a quasi-steady Kutta-Joukowski theorem used in past investigations. The improvement in the proper phase of the instantaneous lift force is nominally larger than the improvement for rms lift amplitudes. The numerical study also shows that proper selection of the enclosing acoustic path is critical for accurate lift measurement. ^1H. Johari, & W. Durgin, Expts. in Fluids 25, 1 (1998).

  9. Subimage Extraction by Integer-Type Lifting Wavelet Transforms

    Microsoft Academic Search

    Shigeru Takano; Koichi Niijima

    2000-01-01

    ABSTRACT This paper proposes a method for extracting subimages from a huge reference image by using lifting wavelet transforms that map integers to integers. Our integer- type lifting wavelet transform contains controllable free parameters, which are constructed based on an integer version of Haar transform. Our learning method is to determine such free parameters using some subimages so as to

  10. GENERALIZED LIFTING FOR SPARSE IMAGE REPRESENTATION AND CODING

    Microsoft Academic Search

    Julio C. Rolón; Philippe Salembier

    This paper investigates the use of generalized lifting to increase the sparseness of wavelet decompositions with application to image representation and coding. As in the bandelet approach, the strategy consists in applying first a separable wavelet decomposition and then in processing the details subbands to further decorrelate the signal representation. For this second step, we use a generalized lifting (13)

  11. Gurney flap—Lift enhancement, mechanisms and applications

    Microsoft Academic Search

    J. J. Wang; Y. C. Li; K.-S. Choi

    2008-01-01

    Since its invention by a race car driver Dan Gurney in 1960s, the Gurney flap has been used to enhance the aerodynamics performance of subsonic and supercritical airfoils, high-lift devices and delta wings. In order to take stock of recent research and development of Gurney flap, we have carried out a review of the characteristics and mechanisms of lift enhancement

  12. Occupational Prestige and Occupational Aspirations of Nigerian Adolescent Students.

    ERIC Educational Resources Information Center

    Owuamanam, Donatus O.

    1982-01-01

    Nigerian secondary school students considered engineering, medicine, and university teaching to be highly prestigious occupations. Males had higher occupational aspirations than females, and urban adolescents chose higher careers than rural adolescents. (Author/MJL)

  13. Occupational lung cancer

    SciTech Connect

    Coultas, D.B.; Samet, J.M. (Department of Medicine, University of New Mexico School of Medicine, Albuquerque (United States))

    1992-06-01

    The overall importance of occupational agents as a cause of lung cancer has been a controversial subject since the 1970s. A federal report, released in the late 1970s, projected a surprisingly high burden of occupational lung cancer; for asbestos and four other agents, from 61,000 to 98,000 cases annually were attributed to these agents alone. Many estimates followed, some much more conservative. For example, Doll and Peto estimated that 15% of lung cancer in men and 5% in women could be attributed to occupational exposures. A number of population-based case-control studies also provide relevant estimates. In a recent literature review, Vineis and Simonato cited attributable risk estimates for occupation and lung cancer that ranged from 4% to 40%; for asbestos alone, the estimates ranged from 1% to 5%. These estimates would be expected to vary across locations and over time. Nevertheless, these recent estimates indicate that occupation remains an important cause of lung cancer. Approaches to Prevention. Prevention of lung cancer mortality among workers exposed to agents or industrial processes that cause lung cancer may involve several strategies, including eliminating or reducing exposures, smoking cessation, screening, and chemo-prevention. For example, changes in industrial processes that have eliminated or reduced exposures to chloromethyl ethers and nickel compounds have provided evidence of reduced risk of lung cancer following these changes. Although occupational exposures are important causes of lung cancer, cigarette smoking is the most important preventable cause of lung cancer. For adults, the work site offers an important location to target smoking cessation efforts. In fact, the work site may be the only place to reach many smokers.

  14. Operational experience with a powered-lift STOL aircraft

    NASA Technical Reports Server (NTRS)

    Innis, R. C.; Quigley, H. C.

    1976-01-01

    The experience gained in over four years of STOL operations with the augmentor wing research aircraft and the background of operation of other STOL powered-lift aircraft indicate that the use and percent of lift achieved by powered lift have significant effects on the operational characteristics of STOL aircraft and, therefore, on the performance that can be achieved. A brief description of the augmentor wing including the means by which it achieves its powered lift is presented. Specific problem areas relating to the control of longitudinal flight path are discussed as well as the consequences these might have on the design and operation of this class of aircraft. Particular emphasis is given to the approach and landing phase of flight where the consequences of the powered lift are most pronounced, and the resultant characteristics most different from those of conventional aircraft.

  15. Lift-off parameters of saltating particles on Mars

    NASA Astrophysics Data System (ADS)

    Fu, Lin-Tao; Bo, Tian-Li; Zheng, Xiao-Jing

    2014-05-01

    The aeolian events are frequent on Mars. However, we have very limited understanding of aeolian process, because we cannot conduct experiments, as we did on Earth, on martian surface directly right now. In this paper, we studied the lift-off parameters of saltating particles in wind-blown sand on Mars systematically through a numerical way. The main findings are shown as follows: (1) the lift-off speeds of martian particles increase linearly with wind shear velocities; (2) the lift-off speeds of particles on Mars have the same order of magnitude as but a little smaller than those on Earth at the same shear velocity; (3) the lift-off angles on Mars are almost equal to those on Earth and have weak dependence on shear velocities; (4) the lift-off parameters (both speeds and angles) are influenced by particle diameters.

  16. Correlation of Puma airloads: Lifting-line and wake calculation

    NASA Technical Reports Server (NTRS)

    Bousman, William G.; Young, Colin; Gilbert, Neil; Toulmay, Francois; Johnson, Wayne; Riley, M. J.

    1989-01-01

    A cooperative program undertaken by organizations in the United States, England, France, and Australia has assessed the strengths and weaknesses of four lifting-line/wake methods and three CFD methods by comparing their predictions with the data obtained in flight trials of a research Puma. The Puma was tested in two configurations: a mixed bladed rotor with instrumented rectangular tip blades, and a configuration with four identical swept tip blades. The results are examined of the lifting-line predictions. The better lifting-line methods show good agreement with lift at the blade tip for the configuration with four swept tips; the moment is well predicted at 0.92 R, but deteriorates outboard. The predictions for the mixed bladed rotor configuration range from fair to good. The lift prediction is better for the swept tip blade than for the rectangular tip blade, but the reasons for this cannot be determined because of the unmodeled effects of the mixed bladed rotor.

  17. Optimum reentry trajectories of a lifting vehicle

    NASA Technical Reports Server (NTRS)

    Chern, J. S.; Vinh, N. X.

    1978-01-01

    The optimum maneuver of a space shuttle vehicle reentering a spherical, stationary, and locally exponential atmosphere was investigated. The use of Chapman's modified variables and a rescaled lift-drag polar leads to the formulation of a set of dimensionless equations of motion for flight analysis. The resulting equations are exact in the sense that they are also valid for flight in the vacuum. For planar flight several typical optimum maneuvers are investigated at different altitude ranges, low, moderate and very high. For three-dimensional flight, the procedure to solve the optimum trajectory for maximum cross range is discussed. Finally, using the equilibrium glide condition the maximum cross ranges for entry from circular speed, for several values of E*, and the footprint for E* = 1.5 are computed in this reduced problem.

  18. Math on the Job. Heavy Equipment Operator.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. National Center for Research in Vocational Education.

    This booklet is intended to help mainstreamed mentally retarded, emotionally disturbed, or learning disabled high school students acquire a basic understanding of the responsibilities and working conditions of heavy equipment operators and to practice basic math skills necessary in the occupation. The first section provides a brief introduction to…

  19. Department of Occupational Science and Occupational Therapy Faculty of Medicine

    E-print Network

    Sokolowski, Marla

    on occupational science and focused on building evidence-based practice competencies. Through your academic-centred, evidence-based therapeutic relationships between practicing occupational therapists and their clients as one of the top three entry-level occupational therapy programs in North America. The program is based

  20. Occupational Orientation: Applied Biological and Agricultural Occupations. Experimental Curriculum Materials.

    ERIC Educational Resources Information Center

    Illinois State Office of Education, Springfield.

    These experimental curriculum materials, from one of five clusters developed for the occupational orientation program in Illinois, include a series of learning activity packages (LAPs) designed to acquaint the student with the wide range of occupational choices available in the applied biological and agricultural occupations. The 30 LAPs, each…

  1. Occupational Orientation: Personal and Public Service Occupations. Experimental Curriculum Materials.

    ERIC Educational Resources Information Center

    Illinois State Office of Education, Springfield.

    These experimental curriculum materials for one of five clusters developed for the occupational orientation program in Illinois include a series of learning activity packages (LAPs) designed to acquaint the student with the wide range of occupational choices available in the personal and public service occupations field. The 29 LAPS, each focusing…

  2. Numerical simulation of a powered-lift landing, tracking flow features using overset grids, and simulation of high lift devices on a fighter-lift-and-control wing

    NASA Technical Reports Server (NTRS)

    Chawla, Kalpana

    1993-01-01

    Attached as appendices to this report are documents describing work performed on the simulation of a landing powered-lift delta wing, the tracking of flow features using overset grids, and the simulation of flaps on the Wright Patterson Lab's fighter-lift-and-control (FLAC) wing. Numerical simulation of a powered-lift landing includes the computation of flow about a delta wing at four fixed heights as well as a simulated landing, in which the delta wing descends toward the ground. Comparison of computed and experimental lift coefficients indicates that the simulations capture the qualitative trends in lift-loss encountered by thrust-vectoring aircraft operating in ground effect. Power spectra of temporal variations of pressure indicate computed vortex shedding frequencies close to the jet exit are in the experimentally observed frequency range; the power spectra of pressure also provide insights into the mechanisms of lift oscillations. Also, a method for using overset grids to track dynamic flow features is described and the method is validated by tracking a moving shock and vortices shed behind a circular cylinder. Finally, Chimera gridding strategies were used to develop pressure coefficient contours for the FLAC wing for a Mach no. of 0.18 and Reynolds no. of 2.5 million.

  3. Sample Occupations Sample Work Settings

    E-print Network

    Ronquist, Fredrik

    Therapist Assistant Optometric Assistant Physical Therapist Asst Physician Assistant NURSES Dental NurseHealth Sample Occupations Sample Work Settings Ambulance Service Assisted Living Facilities Blood Opportunities in Occupational Therapy Careers........... IIB 29­1122 A2 PHYSICIANS Acupuncturist Allergist

  4. Occupational Disease in Connecticut, 2011

    E-print Network

    Oliver, Douglas L.

    1 Occupational Disease in Connecticut, 2011 This report covers data for 2009 and was prepared under, as part of the Occupational Disease Surveillance Program, operated in cooperation with the Connecticut...............................................................................................16 Infectious Diseases

  5. Occupational Disease in Connecticut, 2014

    E-print Network

    Oliver, Douglas L.

    Occupational Disease in Connecticut, 2014 This report covers data for 2012 and was prepared under, as part of the Occupational Disease Surveillance Program, operated in cooperation with the Connecticut...............................................................................................18 Infectious Diseases

  6. Graduate Diploma in Occupational Safety &

    E-print Network

    of Public Health, Physiotherapy and Population Science GRADUATE Understanding your Degree: This programme: · Safety and Health Legislation · Health and Safety Management · OSH Research Literature ReviewGraduate Diploma in Occupational Safety & Health/MSc in Occupational Safety & Health UCD School

  7. In-Flight Subsonic Lift and Drag Characteristics Unique to Blunt-Based Lifting Reentry Vehicles

    NASA Technical Reports Server (NTRS)

    Saltzman, Edwin J.; Wang, K. Charles; Iliff, Kenneth W.

    2007-01-01

    Lift and drag measurements have been analyzed for subsonic flight conditions for seven blunt-based reentry-type vehicles. Five of the vehicles are lifting bodies (M2-F1, M2-F2, HL-10, X-24A, and X-24B) and two are wing-body configurations (the X-15 and the Space Shuttle Enterprise). Base pressure measurements indicate that the base drag for full-scale vehicles is approximately three times greater than predicted by Hoerner's equation for three-dimensional bodies. Base drag and forebody drag combine to provide an optimal overall minimum drag (a drag "bucket") for a given configuration. The magnitude of this optimal drag, as well as the associated forebody drag, is dependent on the ratio of base area to vehicle wetted area. Counter-intuitively, the flight-determined optimal minimum drag does not occur at the point of minimum forebody drag, but at a higher forebody drag value. It was also found that the chosen definition for reference area for lift parameters should include the projection of planform area ahead of the wing trailing edge (i.e., forebody plus wing). Results are assembled collectively to provide a greater understanding of this class of vehicles than would occur by considering them individually.

  8. Occupational medicine for policing

    Microsoft Academic Search

    A Trottier; J Brown

    1995-01-01

    A wide variety of medical conditions may be associated with police work. Unlike other occupations where a specific link can be traced between an exposure or an action and a specific pathology, the link between police work and disease is more problematic.The medical conditions which seem to be associated with police work are all conditions for which numerous other risk

  9. Occupational Hazards of Farming

    PubMed Central

    White, Gill; Cessna, Allan

    1989-01-01

    A number of occupational hazards exist for the farmer and farm worker. They include the hazards of farm machinery, biologic and chemical hazards, and social and environmental stresses. Recognizing of these hazards will help the family physician care for farmers and their families. PMID:21248929

  10. Occupational Literacy Education.

    ERIC Educational Resources Information Center

    Rush, R. Timothy; And Others

    Intended for teachers of adult basic education as well as teachers in job retraining programs, this book focuses on the development of written and oral language competencies required in occupational and training settings. The first four chapters offer a concise synthesis of recent research on adult learning and on workplace literacy for ten…

  11. Foodservice Occupations Cluster Guide.

    ERIC Educational Resources Information Center

    Oregon State Dept. of Education, Salem.

    Intended to assist vocational teachers in developing and implementing a cluster program in food service occupations, this guide contains sections on cluster organization and implementation and instructional emphasis areas. The cluster organization and implementation section covers goal-based planning and includes a proposed cluster curriculum, a…

  12. Occupational stress in nursing

    Microsoft Academic Search

    A. McGrath; N. Reid; J. Boore

    2003-01-01

    This article reports the results of a study of occupational stress undertaken with a large sample of Northern Ireland nurses, including qualified staff (both community and hospital based) up to and including sister\\/charge nurses. This study formed part of a wider interprofessional study of nurses, social workers and teachers. Publications for the latter two professions, along with interprofessional comparisons, are

  13. Coping With Occupational Stress.

    ERIC Educational Resources Information Center

    O'Brien, Dianne Boswell

    1981-01-01

    Ways of reducing occupational stress include: (1) avoiding the stressful situation; (2) changing the response to the stress; and (3) changing the environment. Administrators can help teachers manage stress by developing communication techniques, steering committees, and support groups. A second part of this article will be published in the January…

  14. Hospitality Occupations. Curriculum Guide.

    ERIC Educational Resources Information Center

    California State Dept. of Education, Sacramento. Bureau of Homemaking Education.

    This curriculum guide on the hospitality occupations was developed to help secondary and postsecondary home economics teachers prepare individuals for entry-level jobs in the hospitality industry. The content is in seven sections. The first section presents organizational charts of a medium-size hotel, food and beverage division, housekeeping and…

  15. Predicting occupational diseases

    Microsoft Academic Search

    Eva Suarthana; Evert Meijer; Diederick E Grobbee; Dick Heederik

    2009-01-01

    Prediction research is relatively new in the occupational health field, although it is well established in clinical medicine. Prediction models are developed to estimate the individual probability of the presence (diagnostic model) or future occurrence (prognostic model) of an outcome (ie, disease). As an example from clinical practice, Wells and colleagues demonstrated that a diagnostic model (comprised of the patient’s

  16. Cause of occupational disease

    Microsoft Academic Search

    D C Muir

    1995-01-01

    The concept of causality is reviewed with special emphasis on occupational diseases. Separate approaches from the philosophical, scientific, and legal points of view are identified. There is controversy over the methodology of logical causality; inductive and deductive methods are described and reference is made to the verification or refutation approach. Application of the methods to epidemiology are reviewed. It is

  17. Theoretical Conceptualizations of Occupational Therapy

    Microsoft Academic Search

    Lela A. Llorens

    1984-01-01

    A descriptive chronology of occupational therapists' conceptualizations of occupational therapy is presented. Major theoretical frames of reference and common theory bases underlying occupational therapy practice are identified. The question of the apparent lack of theoretical conceptualizations of practice based on biomechanical approaches is raised.

  18. Occupational Therapy for Chronic Pain

    Microsoft Academic Search

    Rebecca Liggan Gusich

    1984-01-01

    The patient with chronic pain presents a dilemma for physical as well as psychiatric health care. Usually coming to the attention of mental health professionals after limited or no successful treatment with medical specialties, these patients present with a variety of factors that disrupt occupational functioning. Occupational therapy is the health profession qualified to analyze occupational function and dysfunction for

  19. Janet Craig Occupational Health Manager

    E-print Network

    Schnaufer, Achim

    medicine," publishes his first book on occupational diseases, De Morbis Artificum Diatriba (The Diseases diseases. 1994 The University of Edinburgh commenced a health surveillance compliance based occupational20/02/2014 1 Janet Craig Occupational Health Manager RGN BSc RSCPHN(OH) 1556 1700 Bauer 1494

  20. Contribution of occupational factors to current smoking among active-duty U.S. Navy careerists.

    PubMed

    Cunradi, Carol B; Moore, Roland S; Ames, Genevieve

    2008-03-01

    Rates of cigarette smoking among active-duty U.S. military personnel remain elevated, ranging from 23% among Air Force personnel to 38% among Army personnel. The purpose of this study was to estimate the contribution of occupational factors to current smoking and heavy smoking among a sample of Navy careerists (those with at least 7 years of military service), and to determine if gender moderates these associations. Participants in the study (n = 2,922) were randomly recruited within over-sampled strata of women and racial/ethnic minorities, and voluntarily completed confidential self-administered questionnaires on drinking, smoking, demographic, and occupational factors during 2001-2002. Approximately 23% of study participants reported current smoking; 9% reported heavy smoking. Multivariate logistic regression models were developed to estimate the contribution of occupational factors to current smoking and heavy smoking. The results indicated that careerists in the enlisted ranks were significantly more likely to be current smokers and heavy smokers compared with careerist officers. In addition, those who were deployed at sea were significantly more likely to report current smoking compared with those not currently deployed at sea. Mean daily ounces of alcohol were also significantly associated with likelihood of current and heavy smoking. Gender did not modify the association between occupational factors and smoking. Because aspects of the work environment are potentially modifiable, understanding the role of occupational factors vis-à-vis smoking can aid in smoking prevention and cessation efforts within the military. PMID:18324561

  1. Reflections on a Renaissance of Occupation.

    ERIC Educational Resources Information Center

    Whiteford, Gail; Townsend, Elizabeth; Hocking, Clare

    2000-01-01

    Discusses the renaissance of occupation in occupational therapy and occupational science. Suggests that postmodern ideas and social practices have helped create a societal context in which a renaissance of occupation is welcome. Considers what such a renaissance means for occupational therapists and occupational scientists in the 21st century.…

  2. Sentinel Event Notification System for Occupational Risks (SENSOR): Recommendations for control of silica exposure at Woodbridge Sanitary Pottery Corporation, Woodbridge, New Jersey

    SciTech Connect

    Caplan, P.E.; Valiante, D.; Cooper, T.C.; Crouch, K.G.; Gideon, J.A.

    1989-06-01

    An in-depth survey of exposure to silica dust at the Woodbridge Sanitary Pottery Corporation, Woodbridge, New Jersey was conducted as a part of the Sentinel Event Notification System for Occupational Risks (SENSOR) cooperative effort. The facility manufactured vitreous china products, including toilet bowls and lavatories. Personal and area atmospheric sampling showed that personal exposure to respirable crystalline silica dust ranged from 0.12 to 0.18 mg/m{sup 3} with at least half the samples exceeding the NIOSH recommended exposure limit of 0.05 mg/m{sup 3} for crystalline silica. The workers in the Slip House suffered the highest exposures, where area concentrations averaged 0.38 mg/m{sup 3}. Of the other three areas, casting, glaze spraying, and glaze preparation, the highest personal exposures were in the glaze-spraying areas where 67% of the personal samples exceeded the OSHA permissible exposure limits for respirable dust. Ergonomic evaluations were conducted to determine lifting hazards at several workstations. The authors conclude that there were excessive exposures to respirable silica dust and respirable dust. There was also a high risk of lost time in injuries from manual handling of heavy loads. Improvements should be made in the design and maintenance of ventilation control systems, work stations, and work practices.

  3. A new solution method for lifting surfaces in subsonic flow

    NASA Technical Reports Server (NTRS)

    Ueda, T.; Dowell, E. H.

    1982-01-01

    A simple method for calculating the unsteady aerodynamic loadings on harmonically oscillating thin wings in subsonic flow has been developed. The method is based on a concept of concentrated lift forces. The wing is divided into the element surfaces on which lift distributions are represented by single concentrated lift forces. Since the procedure does not include any quadratures, it can be applied easily to calculate the unsteady aerodynamic loadings on complex planform wings even when they have partial span control surfaces. Numerical calculations are carried out for various wing geometries and compared with other analyses and experiments.

  4. Lifting surface theory for a helicopter rotor in forward flight

    NASA Technical Reports Server (NTRS)

    Tai, H.; Runyan, H. L.

    1984-01-01

    A lifting surface theory was developed for a helicopter rotor in forward flight for compressible and incompressible flow. The method utilizes the concept of the linearized acceleration potential and makes use of the vortex lattice procedure. Calculations demonstrating the application of the method are given in terms of the lift distribution on a single rotor, a two-bladed rotor, and a rotor with swept-forward and swept-back tips. In addition, the lift on a rotor which is vibrating in a pitching mode at 4/rev is given. Compressibility effects and interference effects for a two-bladed rotor are discussed.

  5. Two-dimensional unsteady lift problems in supersonic flight

    NASA Technical Reports Server (NTRS)

    Heaslet, Max A; Lomax, Harvard

    1949-01-01

    The variation of pressure distribution is calculated for a two-dimensional supersonic airfoil either experiencing a sudden angle-of-attack change or entering a sharp-edge gust. From these pressure distributions the indicial lift functions applicable to unsteady lift problems are determined for two cases. Results are presented which permit the determination of maximum increment in lift coefficient attained by an unrestrained airfoil during its flight through a gust. As an application of these results, the minimum altitude for safe flight through a specific gust is calculated for a particular supersonic wing of given strength and wing loading.

  6. Hydrofoils: optimum lift-off speed for sailboats.

    PubMed

    Baker, R M

    1968-12-13

    For a hydrofoil sailboat there is a unique optimum lift-off speed. Before this speed is reached, if there are no parasitic vertical hydrofoil appendages, the submerged or partially submerged hydrofoils increase drag and degrade performance. As soon as this speed is reached and the hydrofoils are fully and promptly deployed, the performance of a hydrofoil-borne craft is significantly improved. At speeds exceeding optimum lift-off speed, partially submerged hydrofoils impair performance if there is no significant effect of loading on the hydrofoil lift-to-drag ratio. PMID:17756335

  7. Experimental analysis of the mechanics of reverse circulation air lift

    E-print Network

    Zeineddine, Talal Ibrahim

    1980-01-01

    investigation of the two-phase air-water flow in the lifting pipe of an air lift pump model was conducted. The effect of the diffuser design on the efficiency of the pump was then determined. The experimental study consisted of measuring the void frac- tion... by Henriksen revealed that Henriksen's equation is an accurate model for predicting pressure drops in two-phase flows in a vertical pipe. Since this experiment reveals a remarkable difference in the air lift pump efficiency when using two slightly different...

  8. Exploration of Titan using Vertical Lift Aerial Vehicles

    NASA Technical Reports Server (NTRS)

    Young, L. A.

    2001-01-01

    Autonomous vertical lift aerial vehicles (such as rotorcraft or powered-lift vehicles) hold considerable potential for supporting planetary science and exploration missions. Vertical lift aerial vehicles would have the following advantages/attributes for planetary exploration: low-speed and low-altitude detailed aerial surveys; remote-site sample return to lander platforms; precision placement of scientific probes; soft landing capability for vehicle reuse (multiple flights) and remote-site monitoring; greater range, speed, and access to hazardous terrain than a surface rover; greater resolution of surface details than an orbiter or balloons. Exploration of Titan presents an excellent opportunity for the development and usage of such vehicles.

  9. Nonlinear Stability and Response of Lifting Surfaces Via Volterra Series

    NASA Technical Reports Server (NTRS)

    Marzocca, Piergiovanni; Librescu, Liviu; Silva, Walter A.

    2001-01-01

    This investigation concerns the time and frequency formulations of non-linear two-dimensional lifting surfaces exposed to an incompressible flow field and subjected to an external pressure pulse. In order to address this problem, Volterra series approach in conjunction with the multidimensional Laplace transform is used. This methodology enabling one to solve the aeroelastic governing equations of lifting surfaces opens the way to connect this methodology with that based on neural networks and NARMAX/NARX networks models. Moreover, this extended way to address this problem constitutes a good basis for treatment of the theory of 3D lifting surfaces.

  10. Occupation as therapy for trauma recovery: a case study.

    PubMed

    Precin, Patricia

    2011-01-01

    In this case study, a young women who has chronic verbal, emotional, and physical abuse and was exposed to repetitive adult acts of abuse as a child initially presented with Posttraumatic Stress Disorder (PTSD) marked by constriction and disconnection, which resulted in her feeling passive and tortured. As part of her occupational therapy intervention, based on the occupational adaptation, psychoanalytic, and recovery frames of reference, she was able to use her skills as a musician and lyricist to work through her trauma by performing heavy metal music. She used work to express emotions and tell and retell her story to audiences eager to hear her. Work helped her develop an identity that allowed her to be active in the world and reach out to others through her music. This case study focuses on the intervention - how music and occupation functioned as a foundation for relieving her PTSD. PMID:21248422

  11. Insulation Test Cryostat with Lift Mechanism

    NASA Technical Reports Server (NTRS)

    Fesmire, James E. (Inventor); Dokos, Adam G. (Inventor)

    2014-01-01

    A multi-purpose, cylindrical thermal insulation test apparatus is used for testing insulation materials and systems of materials using a liquid boil-off calorimeter system for absolute measurement of the effective thermal conductivity (k-value) and heat flux of a specimen material at a fixed environmental condition (cold-side temperature, warm-side temperature, vacuum pressure level, and residual gas composition). The apparatus includes an inner vessel for receiving a liquid with a normal boiling point below ambient temperature, such as liquid nitrogen, enclosed within a vacuum chamber. A cold mass assembly, including the upper and lower guard chambers and a middle test vessel, is suspended from a lid of the vacuum canister. Each of the three chambers is filled and vented through a single feedthrough. All fluid and instrumentation feedthroughs are mounted and suspended from a top domed lid to allow easy removal of the cold mass. A lift mechanism allows manipulation of the cold mass assembly and insulation test article.

  12. Occupation and pregnancy outcome

    Microsoft Academic Search

    A D McDonald; J C McDonald; B Armstrong; N Cherry; C Delorme; A D-Nolin; D Robert

    1987-01-01

    Over a two year period, 1982-4, 56067 women, delivered or treated for a spontaneous abortion in 11 Montreal hospitals covering 90% of such admissions, were interviewed in detail regarding their occupational, social, and personal characteristics in their most recent and past pregnancies--104,649 in all. These data were analysed in relation to four main adverse outcomes--spontaneous abortion, stillbirth (without defect), congenital

  13. ETHNIC OCCUPATIONAL STATUSES

    E-print Network

    Mennerick, Lewis A.

    1968-04-01

    statuses have an ethnic counterpart. Chemists, engineers, and skilled laborers, for example, usually do not seek to possess and display auxiliary ethnic traits. While Italian- ~Americans may occupy the status of chemist, they are not usually thought...IS ethnic occupational status primarily because his qualifications are not strong enough to enable him to compete outside of the ethnic community or because his participation in the larger system is restricted by out-group persons who are in positions...

  14. Charts of the Induced Velocities Near a Lifting Rotor

    NASA Technical Reports Server (NTRS)

    Jewel, Joseph W., Jr.; Heyson, Harry H.

    1959-01-01

    A compilation of charts of the induced velocities near a lifting rotor is presented. The charts cover uniform as well as various non-uniform distributions of disk loading and should be applicable to many aerodynamic interference problems involving rotors.

  15. 13. TURNING DEVICE SUSPENDED FROM, AND LIFTED BY THE OVERHEAD ...

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

    13. TURNING DEVICE SUSPENDED FROM, AND LIFTED BY THE OVERHEAD CRANE SYSTEM EAST OF No. 1 PRESS. - U.S. Steel Homestead Works, Press Shop No. 1, Along Monongahela River, Homestead, Allegheny County, PA

  16. 14. CLOSEUP OF TURNING DEVICE SUSPENDED FROM, AND LIFTED BY ...

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

    14. CLOSE-UP OF TURNING DEVICE SUSPENDED FROM, AND LIFTED BY THE OVERHEAD CRANE SYSTEM EAST OF No. 1 PRESS. - U.S. Steel Homestead Works, Press Shop No. 1, Along Monongahela River, Homestead, Allegheny County, PA

  17. Lift-Off Processing and Superconducting Circuit Coherence

    NASA Astrophysics Data System (ADS)

    Quintana, C. M.; Megrant, A.; Dunsworth, A.; Chen, Zijun; Chiaro, B.; Barends, R.; Campbell, B.; Chen, Yu; Jeffrey, E.; Kelly, J.; Mutus, J. Y.; Neill, C.; O'Malley, P. J. J.; Roushan, P.; Sank, D.; Wenner, J.; White, T. C.; Cleland, A. N.; Martinis, John M.

    2014-03-01

    As superconducting circuit coherence continues to increase, careful attention must be paid to device fabrication techniques. Substantial evidence points to dielectric loss from two-level state defects in thin amorphous interfacial regions as a limiting relaxation mechanism for superconducting qubits. Transmon qubits have traditionally been fabricated using lift-off aluminum deposited together with their Josephson junctions; however, improved coherence times have recently been found in transmons which use lift-off metal for only a small fraction of the qubit. To better understand this improvement and predict any remaining limits imposed by the incorporation of lift-off, we characterize the increased loss found in coplanar waveguide resonators formed with lift-off metal. We vary surface treatment such as oxygen ashing and ion milling, and study the effects of double-angle evaporation, e-beam resist residue, and surface roughness on resonator quality factors.

  18. 15. OVERALL VIEW OF UPSTREAM FACE OF LIFT GATE SECTION ...

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

    15. OVERALL VIEW OF UPSTREAM FACE OF LIFT GATE SECTION WITH TAINTER GATE SECTION OF SPILLWAY TO THE LEFT. VIEW TO SOUTHWEST. - Starved Rock Locks & Dam, Illinois Waterway River mile 231, Peru, La Salle County, IL

  19. View from floating barracks west of lift bridge to reserve ...

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

    View from floating barracks west of lift bridge to reserve basin on psny. - Naval Base Philadelphia-Philadelphia Naval Shipyard, Reserve Basin & Marine Railway, League Island, Philadelphia, Philadelphia County, PA

  20. Oyster shell conveyor used to lift shells from the dock ...

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

    Oyster shell conveyor used to lift shells from the dock into the receiving room housed in the 1965 concrete block addition. - J.C. Lore Oyster House, 14430 Solomons Island Road, Solomons, Calvert County, MD

  1. 19. DETAIL VIEW OF LIFT CABLES ON INSIDE FACE OF ...

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

    19. DETAIL VIEW OF LIFT CABLES ON INSIDE FACE OF YOLO COUNTY TOWER, LOOKING NORTH - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  2. DETAIL VIEW OF VENT HOOD (LEFT) AND WHEEL LIFT (RIGHT), ...

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

    DETAIL VIEW OF VENT HOOD (LEFT) AND WHEEL LIFT (RIGHT), ROOM 1M10, FACING SOUTHEAST - Cape Canaveral Air Force Station, Launch Complex 39, Vehicle Assembly Building, VAB Road, East of Kennedy Parkway North, Cape Canaveral, Brevard County, FL

  3. DETAIL VIEW OF INTERIOR SIDE OF THE LIFTING PORTION OF ...

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

    DETAIL VIEW OF INTERIOR SIDE OF THE LIFTING PORTION OF THE NORTH TRANSFER AISLE DOOR, FACING NORTH - Cape Canaveral Air Force Station, Launch Complex 39, Vehicle Assembly Building, VAB Road, East of Kennedy Parkway North, Cape Canaveral, Brevard County, FL

  4. Detail view of fourth level platform winch used to lift ...

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

    Detail view of fourth level platform winch used to lift platform segments away from the Shuttle assembly during testing. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

  5. 7. DETAIL OF GATE LIFTING GEARS AND ELECTRIC DRIVE MOTOR ...

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

    7. DETAIL OF GATE LIFTING GEARS AND ELECTRIC DRIVE MOTOR (LEFT BACKGROUND) FOR NEW YORK CANAL HEADWORKS. VIEW TO EAST. - Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

  6. 13. DETAIL OF CONCRETE TOWER AND SLIDE GATE LIFTING GEARS ...

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

    13. DETAIL OF CONCRETE TOWER AND SLIDE GATE LIFTING GEARS ON HEADWORKS OF DEER FLAT NAMPA CANAL ON UPPER EMBANKMENT. VIEW TO SOUTHWEST. - Boise Project, Deer Flat Embankments, Lake Lowell, Nampa, Canyon County, ID

  7. 32. DETAIL OF CONCRETE TOWER AND SLIDE GATE LIFTING GEARS ...

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

    32. DETAIL OF CONCRETE TOWER AND SLIDE GATE LIFTING GEARS ON HEADWORKS OF DEER FLAT LOW LINE CANAL ON LOWER EMBANKMENT. VIEW TO SOUTHEAST. - Boise Project, Deer Flat Embankments, Lake Lowell, Nampa, Canyon County, ID

  8. Energetics of oscillating lifting surfaces using integral conservation laws

    NASA Technical Reports Server (NTRS)

    Ahmadi, Ali R.; Widnall, Sheila E.

    1987-01-01

    The energetics of oscillating flexible lifting surfaces in two and three dimensions is calculated by the use of integral conservation laws in inviscid incompressible flow for general and harmonic transverse oscillations. Total thrust is calculated from the momentum theorem and energy loss rate due to vortex shedding in the wake from the principle of conservation of mechanical energy. Total power required to maintain the oscillations and hydrodynamic efficiency are also determined. In two dimensions, the results are obtained in closed form. In three dimensions, the distribution of vorticity on the lifting surface is also required as input to the calculations. Thus, unsteady lifting-surface theory must be used as well. The analysis is applicable to oscillating lifting surfaces of arbitrary planform, aspect ratio, and reduced frequency and does not require calculation of the leading-edge thrust.

  9. 4. DETAIL VIEW OF LIFTING GEAR ON MULE AND RACK ...

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

    4. DETAIL VIEW OF LIFTING GEAR ON MULE AND RACK ATTACHMENT BOOKS, LOOKING EAST - Nine Mile Hydroelectric Development, Powerhouse, State Highway 291 along Spokane River, Nine Mile Falls, Spokane County, WA

  10. The effect of sound on the lift of an airfoil 

    E-print Network

    Kitowski, John Victor

    1962-01-01

    THE EFFECT OF SOUND ON THE LIFT OF AN AIRFOIL By John Victor Kitowski A Thesis Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May, 1962 Qepartment of Aeronautical Engineering Major Subject: Aeronautical Engineering THE EFFECT OF SOUND ON THE LIFT OF AN AIRFOIL A Thesis By John Victor Kitowski Approved as to style and content by: Chairman of Committee Head...

  11. Accuracy of measurements for the revised NIOSH lifting equation

    Microsoft Academic Search

    T. R. Waters; S. L. Baron; K. Kemmlert

    1998-01-01

    Twenty-seven non-ergonomists who participated in a one-day training session on the use of the NIOSH lifting equation (NLE) were subsequently tested on a simulated lifting task eight weeks later to determine their accuracy in measuring the variables. Analysis of the results indicate that (1) inter-observer variability was small, especially for the most important factor (i.e. horizontal distance); (2) individuals can

  12. Atlantis is lifted from its transporter in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    KENNEDY SPACE CENTER, Fla. -- In the Vehicle Assembly Building, the orbiter Atlantis is being lifted from a transporter after rolling over from Orbiter Processing Facility bay 3. The orbiter will be raised to a vertical position, rotated and lifted into high bay 1, and stacked with its external tank and solid rocket boosters. Space Shuttle Atlantis is scheduled to launch on mission STS-104 in early July.

  13. NASA safety standard for lifting devices and equipment

    NASA Technical Reports Server (NTRS)

    1990-01-01

    NASA's minimum safety requirements are established for the design, testing, inspection, maintenance, certification, and use of overhead and gantry cranes (including top running monorail, underhung, and jib cranes), mobile cranes, derrick hoists, and special hoist supported personnel lifting devices (these do not include elevators, ground supported personnel lifts, or powered platforms). Minimum requirements are also addressed for the testing, inspection, and use of Hydra-sets, hooks, and slings. Safety standards are thoroughly detailed.

  14. Noise Reduction in Non-Premixed Lifted-Jet Flames

    Microsoft Academic Search

    K. Ramamurthi; R. K. Patnaik

    2004-01-01

    The characteristic changes in non-premixed lifted flames when excited by hole tones from a cavity, placed in the flow path\\u000a of the fuel gas, were studied. A significant reduction of the sound pressure level was observed in the low-frequency noise\\u000a at the flame base of the lifted flame when the hole tones were induced in the jet. The liftoff height

  15. Pilot safety for the X-24A lifting body vehicle

    NASA Technical Reports Server (NTRS)

    Cochrane, J.; Graham, K.

    1971-01-01

    The design and operational characteristics of the X-24A are described in detail. Primary emphasis is placed on the safety considerations incorporated in the design and flight test stages. It is pointed out that the inherently high drag of the lifting body configuration together with its relatively low lift/drag ratio, generated considerable concern with respect to the pilot's ability to perform safe landings from gliding flight. The resulting safety procedures taken at each stage of development are discussed.

  16. Noise of fan designed to reduce stator lift fluctuations

    NASA Technical Reports Server (NTRS)

    Dittmar, J. H.; Woodward, R. P.; Stakolich, E. G.

    1977-01-01

    An existing fan stage was redesigned to reduce stator lift fluctuations and was acoustically tested at three nozzle sizes for reduced noise generation. The lift fluctuations on the stator were reduced by increasing the stator cord, adjusting incidence angles, and adjusting the rotor velocity diagrams. Broadband noise levels were signficantly reduced in the middle to high frequencies. Blade passage tone sound power was not lessened, but decreases in the harmonics were observed. Aerodynamic improvements in both performance and efficiency were obtained.

  17. Lift augmentation via spanwise tip blowing - A numerical study

    NASA Technical Reports Server (NTRS)

    Childs, R. E.

    1986-01-01

    Numerical simulations of a low aspect ratio wing with and without a spanwise directed jet issuing from the wing tip have been performed. The results show that the tip vortex is displaced outward and upward by the blowing. This gives rise to a local lift augmentation mechanism, vortex lift caused by the vortex core being above the wing, and a global mechanism, the reduction of induced velocities due to greater apparent spin.

  18. Comparison of Infant Car Seat grip orientations and lift strategies.

    PubMed

    Clamann, Michael; Zhu, Biwen; Beaver, Leah; Taylor, Kinley; Kaber, David

    2012-07-01

    The rear-facing Infant Car Seat (ICS) is designed to meet federal requirements for transporting children less than 1 year old. Typical use includes transfer in and out of a vehicle, which is shown to be a difficult lift. Despite the frequency of this lift, manufacturers provide little guidance for users. Review of relevant literature suggested an ICS featuring an angled handle, promoting a neutral wrist posture, would increase grip stability and decrease lifting effort. Popular press suggested a foot-in-car stance for the ICS lift would do the same. An experiment was conducted in which wrist deviations from neutral posture were recorded along with lifting muscle activation levels (multiple flexor muscles and biceps brachii) and overall perceived exertion for straight versus a new bent handle design and conventional stance versus foot-in-car. Foot position was examined to test the recommendations in the popular press. Surprisingly, wrist deviation was not significantly affected by the new bent handle design (due to compensatory behavior with the straight handle) but was related to foot placement (p=0.04). Results revealed the bent handle to significantly reduce flexor activation compared with the straight handle (p=0.0003); however, the level of biceps activation increased. Biceps activation also significantly increased for foot-in-car stance (p=0.035) but not flexor activation. In general, the bent handle enabled the user to lift the ICS with a steadier grip and less effort. PMID:22062871

  19. Profound Impacts of AN Arctic Face Lift

    NASA Astrophysics Data System (ADS)

    Nghiem, Son

    Son Nghiem, son.v.nghiem@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States The ice cover on the Arctic Ocean has undergone a face lift that removes much of the older and thicker perennial ice and replaces it with the younger and thinner seasonal ice. Although the sea ice cover is a thin skin compared to the depth of the Arctic Ocean, this face lift exerts profound change in the Arctic environment. Here, we present scatterometer remote sensing of Arctic sea ice change and its implication on chemical processes from the ice surface to the troposphere extending into the internal continental land. In the context of a half century change, the extent of perennial ice declines at rate of 0.5 million km2 per decade in the 1970s-1990s while there is no discernable trend in the 1950s-1960s. Abruptly, the rate of decrease has tripled to 1.5 million km2 per decade in the 2000s. A record was set in the reduction of Arctic perennial ice extent in winter 2008. By 1 March 2008, perennial ice extent was reduced by one million km2 compared to that at the same time in 2007. On 1 May 2009, perennial ice extent was reduced to 2.1 million km2 , which is a virtual tie to 2.2 million km2 of perennial ice extent on 1 May 2008 given the uncertainty of ±0.2 million km2 . Although the extent of perennial ice extent is similar, its distribution is quite different, with a significant perennial ice pack in the Beaufort Sea in 2008, and in contrast a large expanse of perennial ice along the Transpolar Drift Stream in 2009. The continuing drastic reduction of perennial ice significantly decreases the overall surface albedo, resulting in enhanced solar heat absorption in spring and summer, which further decreases the Arctic ice pack through the ice-albedo feedback mechanism and ice melt from the underside due to oceanic thermodynamic interactions. Satellite maps of sea ice class distribution show the closely conformation with patterns of the regional bathymetry, which demonstrate effects of oceanic water masses controlled by bathymetry on sea ice formation. Sea ice information around the North Pole becomes more critical to support field measurement campaigns carried out by ice breakers or submarines. Results reveal a historical fact that the boundary of perennial sea ice crossed the North Pole in February 2008, leaving the area around this region occupied by seasonal sea ice. The shift of the state of Arctic sea ice cover to the dominance domain of seasonal ice can impact photochemical processes including bromine explosion, ozone depletion, and mercury deposition. Such implications, within the context of Arctic climatic change, are to be investigated in order to assess consequential changes in the Arctic habitat that may affect the health of people and wildlife. Opposing scenarios of Arctic chemical change have been hypothesized and fundamental science questions remain to be addressed.

  20. Linearized Lifting-Surface and Lifting-line Evaluations of Sidewash Behind Rolling Triangular Wings at Supersonic Speeds

    NASA Technical Reports Server (NTRS)

    Bobbitt, Percy J

    1957-01-01

    The lifting-surface sidewash behind rolling triangular wings has been derived for a range of supersonic Mach numbers for which the wing leading edges remain swept behind the mark cone emanating from the wing apex. Variations of the sidewash with longitudinal distance in the vertical plane of symmetry are presented in graphical form. An approximate expression for the sidewash has been developed by means of an approach using a horseshoe-vortex approximate-lifting-line theory. By use of this approximate expression, sidewash may be computed for wings of arbitrary plan form and span loading. A comparison of the sidewash computed by lifting-surface and lifting-line expressions for the triangular wing showed good agreement except in the vicinity of the trailing edge when the leading edge approached the sonic condition. An illustrative calculation has been made of the force induced by the wing sidewash on a vertical tail located in various longitudinal positions.

  1. What`s new in artificial lift. Part 1 -- Sucker rod pumping, progressing cavity pumping, gas lift

    SciTech Connect

    Lea, J.F. [Amoco Production Research, Tulsa, OK (United States); Winkler, H.W. [Texas Tech Univ., Lubbock, TX (United States)

    1997-03-01

    Breaking the overall concept of artificially lifting producing oil and gas wells--vs. relying solely on the wells` ability to flow at desired rates--into two parts, this article discusses the three techniques of sucker rod and progressing cavity (PC) pumping, and gas lift. In the major category of sucker rod pumping, nine recently introduced new techniques include: a new standing valve cage; three types of improved stuffing boxes; a pump inlet gas separator; a computerized well monitor; improved paraffin removal techniques; tubing lining with polyethylene; and a novel way to dispose of produced water in a gas well. Three advances for PC pumping include: introduction of a metallic stator, a flowrate controller to prevent pump damage and a locking tubing collar to prevent backoff. Two gas-lift innovations describe a wireline retrievable valve for coiled tubing and applications of CO{sub 2} gas lift in West Texas.

  2. Respiratory-related limitations in physically demanding occupations.

    PubMed

    Brown, Peter I; McConnell, Alison K

    2012-04-01

    Respiratory muscle work limits high-intensity exercise tolerance in healthy human beings. Emerging evidence suggests similar limitations exist during submaximal work in some physically demanding occupations. In an occupational setting, heavy loads are routinely carried upon the trunk in the form of body armor, backpacks, and/or compressed air cylinders by military, emergency service, and mountain rescue personnel. This personal and respiratory protective equipment impairs respiratory muscle function and increases respiratory muscle work. More specifically, thoracic load carriage induces a restrictive ventilatory limitation which increases the elastic work of breathing, rendering the respiratory muscles vulnerable to fatigue and inducing a concomitant reduction in exercise tolerance. Similarly, breathing apparatus worn by occupational personnel, including fire fighters and military and commercial divers, increases the inspiratory elastic and expiratory resistive work of breathing, precipitating significant inspiratory and expiratory muscle fatigue and a reduction in exercise tolerance. An argument is presented that the unique respiratory challenges encountered in some occupational settings require further research, since these may affect the operational effectiveness and the health and safety of personnel working in physically demanding occupations. PMID:22462371

  3. Occupational asthma and occupational rhinitis: The united airways disease model revisited

    E-print Network

    Boyer, Edmond

    1 Occupational asthma and occupational rhinitis: The united airways disease model revisited Jacques number: +33147107754; Fax number:+33147107768 Key words: occupational asthma, occupational rhinitis, high) Objectives: Whereas accumulating evidence indicates close associations between rhinitis and asthma, little

  4. Occupational Health for Healthcare Providers

    MedlinePLUS

    ... prevention practices. They can reduce your risk of health problems. Use protective equipment, follow infection control guidelines, ... manage stress. National Institute for Occupational Safety and Health

  5. Heavy Flavors

    NASA Astrophysics Data System (ADS)

    Cox, B.; Soni, A.

    This is a summary report of the working group on Heavy Flavors. Discussions at the workshop were centered on B physics and on the signals for heavy quarks and leptons at the SSC. The Working Group Members were: V. Barger, H.-U. Bengtsson, C. Buchanan, I. Bigi, M. Block, B. Cox, N. Glover, J. Hewett, W.Y. Keung, B. Margolis, T. Rizzo, M. Suzuki, A. Soni, D. Stork, and S. Willenbrock.

  6. Occupational Sex Segregation

    NSDL National Science Digital Library

    Theodore Fuller

    This activity is used in a Sociology class for undergraduate students. This activity looks as gender and occupation over time in the United States. This activity uses one customized data sets made from combining census information from 1970-1990. It guides students through data manipulation using WebCHIP software found at DataCounts!. To open WebCHIP with the dataset for the activity, please see instructions and links in the exercise documents under teaching materials. For more information on how to use WebCHIP, see the How To section on DataCounts!

  7. [Occupational allergies to papain].

    PubMed

    van Kampen, V; Merget, R; Brüning, T

    2005-06-01

    Occupational exposure against dusts of plant, bacterial, mould, and animal enzymes is long known to be associated with a high risk of specific sensitization. The present evaluation of literature data confirms that this is also true for papain. This frequently used industrial protease is derived from papaya (Carica papaya). Several cases of specific airway sensitization caused by papain are verified by a number of case reports and cross sectional studies. As symptoms, results of skin prick tests, detection of specific IgE-antibodies and results of specific bronchoprovocation tests are consistent, an immunologic mechanism can be assumed. PMID:15991076

  8. Precision Machining Technologies. Occupational Competency Analysis Profile.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. Vocational Instructional Materials Lab.

    This Occupational Competency Analysis Profile (OCAP), which is one of a series of OCAPs developed to identify the skills that Ohio employers deem necessary to entering a given occupation/occupational area, lists the occupational, academic, and employability skills required of individuals entering the occupation of precision machinist. The…

  9. The 2010 Ruth Zemke Lecture in Occupational Science Occupational Therapy\\/Occupational Science\\/Occupational Justice: Moral Commitments and Global Assemblages

    Microsoft Academic Search

    Gelya Frank

    2011-01-01

    Twenty years have passed since occupational science was founded. It is time to reassess the relationship of occupational science to its roots in occupational therapy and also to reopen a discussion of some foundational assumptions. In particular, we need to situate the profession, occupational therapy, and the discipline, occupational science, in relation to the phenomenon of globalization. The internationalization of

  10. The 2010 Ruth Zemke Lecture in Occupational Science Occupational Therapy\\/Occupational Science\\/Occupational Justice: Moral Commitments and Global Assemblages

    Microsoft Academic Search

    Gelya Frank

    2012-01-01

    Twenty years have passed since occupational science was founded. It is time to reassess the relationship of occupational science to its roots in occupational therapy and also to reopen a discussion of some foundational assumptions. In particular, we need to situate the profession, occupational therapy, and the discipline, occupational science, in relation to the phenomenon of globalization. The internationalization of

  11. Prevention and correction of the "face-lifted" appearance.

    PubMed

    Hamra, S T

    2000-01-01

    In spite of the increasing demand and popularity of facial rejuvenation procedures, there has been little real change of traditional techniques over the past few decades. Face lifts continue to be lateral vector techniques, whether skin lifts, superficial musculoaponeurotic system (SMAS) lifts, or deep plane malar fat maneuvers are done. Lower eyelid procedures continue to include removal of orbital fat in most cases. Laser blepharoplasties combine transconjunctival fat removal with laser skin abrasion. Forehead lifts continue to be optional in most cases, in spite of clear indications. The unfortunate results of these traditional procedures that may occur are becoming easy to recognize. The unopposed tension of lateral vector face lifts allows the cheek tissues to descend eventually over the tightened jawline, creating a "lateral sweep" or pulled appearance of the face. A crescent-shaped mound over the malar area is the inferior orbicularis oculi muscle, not repositioned with conventional procedures. Following conventional blepharoplasty, the lower eyelid contour becomes deeper, and often an hollow appearance develops. A composite face lift combined with an arcus marginalis release can correct these typical problems. The primary vector of the face is superiomedial, which will reverse the unopposed tension of lateral vector techniques and reposition the cheek tissues to their original position. The arcus marginalis release combined with repositioning of the complete orbicularis muscle in a zygorbicular midface flap can be used to correct the most severe hollow lower eyelid. Unwanted and unattractive results are not the fault of the surgeon or the patient but are caused by the surgical technique. As a primary rejuvenative procedure, a composite rhytidectomy will deliver an impressive result that will disallow the ultimate lateral sweep and hollow eyes. In patients that have the unhappy signs of surgery this procedure can effectively correct the face-lifted appearance. PMID:11802570

  12. Twenty year development of occupational diseases in the Czech Republic: medical and geographical aspects.

    PubMed

    Jarolímek, Jan; Urban, Pavel

    2014-12-01

    The study analysed occupational diseases in the Czech Republic from the viewpoint of occupational medicine and medical geography. It used a dataset consisting of 32,646 cases of occupational diseases reported during the period of 1994-2013. The descriptive part of the study analysed occupational diseases according to their spatial distribution, occurrence in different branches of economic activities, employees' gender, and according to chapters of the List of occupational diseases. The incidence of occupational diseases showed an overall decreasing trend, which can be related to several factors--transformation of the national economy (shift from heavy industry to manufacturing industry and services), an improvement in access to occupational healthcare services, increased responsibility of employers for safe working conditions, but also a concealment of health problems by employees for fear of losing job. An exception to the decreasing trend is the automotive industry, in which the upward trend in occupational diseases occurrence was noted. The analytical part of the study focused on the relation between unemployment and occupational diseases incidence rates in different regions of the Czech Republic. In most regions, a statistically significant inverse association was shown between the rate of unemployment and occupational disease incidence. The situation is described in more detail for the Moravia-Silesia and Ustí nad Labem Regions and the Capital City of Prague, wherein a statistically significant inverse association was shown between the rate of unemployment and occupational disease incidence. The theory of marginal utility can explain the phenomenon. To certain degree of health problems, employees tend to prefer employment stability, especially if the unemployment is on rise in their region. On the other hand, if losing their job, they often try to claim benefits connected with occupational diseases. PMID:25622483

  13. Professional Development for Occupational Specialist: Occupational Competency Testing. Final Report.

    ERIC Educational Resources Information Center

    Purdue Univ., Lafayette, IN.

    The organization, scope, and activities of the Indiana Occupational Competency Testing Center were expanded to accommodate the requirements of the new Occupational Specialist Certificate for secondary vocational teacher credentialling. A pilot project involved three regional sites in the state. The director of the host area site acted as area…

  14. Instructional Support System--Occupational Education. Building Industries Occupations.

    ERIC Educational Resources Information Center

    Abramson, Theodore; And Others

    The modules which make up the bulk of this report are the result of a two-week workshop at which thirteen building industries occupations teachers worked toward the development of a student outcome oriented curriculum. These modules are divided into the following occupational units: (1) carpentry (containing hand tools; portable power tools;…

  15. Occupational Mental Health, Labor Accidents and Occupational Diseases

    ERIC Educational Resources Information Center

    Naveillan, F. Pedro

    1973-01-01

    The article discusses the relationship between mental health and labor accidents as it pertains to accident prevention, treatment of accident victims, and their rehabilitation. It also comments briefly on mental health and occupational diseases and the scope of the field of occupational mental health from a Chilean perspective. (AG)

  16. Laithwaite's Heavy Spinning Disk Demonstration

    NASA Astrophysics Data System (ADS)

    Cross, Rod

    2014-09-01

    In 1974, Professor Eric Laithwaite demonstrated an unusually heavy gyroscope at a Royal Institution lecture in London. The demonstration was televised and can be viewed on YouTube.1 A recent version of the same experiment, together with partial explanations, attracted two million YouTube views in the first few months.2 In both cases, the gyroscope consisted of a 40-lb (18-kg) spinning disk on the end of a 3-ft (0.91-m) long axle. The most remarkable feature of the demonstration was that Laithwaite was able to lift the disk over his head with one hand, holding onto the far end of the axle. The impression was given that the 40-lb disk was almost weightless, or "as light as a feather" according to Laithwaite.

  17. Occupational allergies and asthma.

    PubMed Central

    Tarlo, S. M.

    1999-01-01

    OBJECTIVE: To review aspects of occupational allergies and asthma for primary care physicians recognizing, diagnosing, and managing patients with these conditions. QUALITY OF EVIDENCE: Studies in the medical literature mainly provide level 2 evidence, that is, from at least one well-designed clinical trial without randomization, from cohort or case-control analytical studies, from multiple time series, or from dramatic results in uncontrolled experiments. MAIN MESSAGE: Occupational allergies and asthma have the best prognosis with an early, accurate diagnosis and subsequent avoidance of exposure to the relevant sensitizer. These diagnoses can normally be suspected from the clinical history. Primary care physicians can also initiate investigations to make an objective diagnosis, can assess workplace exposure agents from the history, and can review appropriate data sheets on material safety. Specialist evaluation is likely to be needed for skin tests, however, and for other specialized tests (such as pulmonary function assessments at work and off work or specific challenges with the suspected workplace agent). Patients with a confirmed diagnosis need appropriate medical management of their allergic manifestations or asthma, but also often require psychosocial support during the period of investigation and management, especially in relation to required changes in their work and to compensation or insurance claims. CONCLUSIONS: Consider workplace exposure as a source of patients' allergies or asthma and aim to make an early, accurate diagnosis. PMID:10386216

  18. Environmental and occupational allergies.

    PubMed

    Peden, David; Reed, Charles E

    2010-02-01

    Airborne allergens are the major cause of allergic rhinitis and asthma. Daily exposure comes from indoor sources, chiefly at home but occasionally at schools or offices. Seasonal exposure to outdoor allergens, pollens, and molds is another important source. Exposure to unusual substances at work causes occupational asthma, accounting for about 5% of asthma in adults. Indoor and outdoor air pollutants trigger airway inflammation and increase the severity of asthma. Diesel exhaust particles increase the production of IgE antibodies. Identification and reduction of exposure to allergens is a very important part of the management of respiratory allergic diseases. The first section of this chapter discusses domestic allergens, arthropods (mites and cockroaches), molds, and mammals (pets and mice). Indoor humidity and water damage are important factors in the production of mite and mold allergens, and discarded human food items are important sources of proliferation of cockroaches and mice. Means of identifying and reducing exposure are presented. The second section discusses outdoor allergens: pollens and molds. The particular plants or molds and the amount of exposure to these allergens is determined by the local climate, and local pollen and mold counts are available to determine the time and amount of exposure. Climate change is already having an important effect on the distribution and amount of outdoor allergens. The third section discusses indoor and outdoor air pollution and methods that individuals can take to reduce indoor pollution in addition to eliminating cigarette smoking. The fourth section discusses the diagnosis and management of occupational asthma. PMID:20176257

  19. An Exploration of the Role of Occupation in School-Based Occupational Therapy Practice

    ERIC Educational Resources Information Center

    Benson, Jeryl DiSanti

    2010-01-01

    The purpose of this study was to explore the role of occupation in school-based occupational therapy practice. The research questions were (1) How do school-based occupational therapists describe the role of occupation during intervention? (2) Which theories of occupation do school-based occupational therapists associate with their own practice?…

  20. Salmon farming: occupational health in a new rural industry.

    PubMed

    Douglas, J D

    1995-04-01

    The medical hazards of salmon farming can be grouped into those related to marine safety, fish husbandry, fish-farm diving and disease treatments. The hostile water environment requires thermal protection and personal buoyancy aids as workers frequently fall in the water from boats or cages. Feedstuffs may generate respirable dust and attract rats, creating a risk of leptospirosis. Musculo-skeletal injuries are common from lifting nets. Fish-farm diving has particular risks which can be minimized. Organophosphorous pesticides are used to treat sea lice and employees require health surveillance. Fish immunization is required to reduce the incidence of Aeromonas salmonitica. Needlestick injuries when using oil-based vaccines are a serious hazard to employees. The occupational health problems of salmon farming are predictable and preventable with primary safety measures. This new industry is safer than land-based agriculture on current evidence. PMID:7718825

  1. Bilayer lift-off process for aluminum metallization

    NASA Astrophysics Data System (ADS)

    Wilson, Thomas E.; Korolev, Konstantin A.; Crow, Nathaniel A.

    2015-01-01

    Recently published reports in the literature for bilayer lift-off processes have described recipes for the patterning of metals that have recommended metal-ion-free developers, which do etch aluminum. We report the first measurement of the dissolution rate of a commercial lift-off resist (LOR) in a sodium-based buffered commercial developer that does not etch aluminum. We describe a reliable lift-off recipe that is safe for multiple process steps in patterning thin (<100 nm) and thick aluminum devices with micron-feature sizes. Our patterning recipe consists of an acid cleaning of the substrate, the bilayer (positive photoresist/LOR) deposition and development, the sputtering of the aluminum film along with a palladium capping layer and finally, the lift-off of the metal film by immersion in the LOR solvent. The insertion into the recipe of postexposure and sequential develop-bake-develop process steps are necessary for an acceptable undercut. Our recipe also eliminates any need for accompanying sonication during lift-off that could lead to delamination of the metal pattern from the substrate. Fine patterns were achieved for both 100-nm-thick granular aluminum/palladium bilayer bolometers and 500-nm-thick aluminum gratings with 6-?m lines and 4-?m spaces.

  2. Cleft lift procedure for pilonidal disease: technique and perioperative management.

    PubMed

    Favuzza, J; Brand, M; Francescatti, A; Orkin, B

    2015-08-01

    Pilonidal disease is a common condition affecting young patients. It is often disruptive to their lifestyle due to recurrent abscesses or chronic wound drainage. The most common surgical treatment, "cystectomy," removes useful tissue unnecessarily and does not address the etiology of the condition. Herein, we describe the etiology of pilonidal disease and our technique for definitive management of pilonidal disease using the cleft lift procedure. In this paper, we present our method of performing the cleft lift procedure for pilonidal disease including perioperative management and surgical technique. We have used the cleft lift procedure in nearly 200 patients with pilonidal disease, in both primary and salvage procedures settings. It has been equally successful in both settings with a high rate of success. It results in a closed wound with relatively minimal discomfort and straightforward wound care. We have described our current approach to recurrent and complex pilonidal disease using the cleft lift procedure. Once learned, the cleft lift procedure is a straightforward and highly successful solution to a chronic and challenging condition. PMID:26165209

  3. Department of Epidemiology, Biostatistics Occupational Health

    E-print Network

    Shoubridge, Eric

    Department of Epidemiology, Biostatistics and Occupational Health Student Handbook Regulations contained in this brochure pertain to the Graduate Programs in Epidemiology, Biostatistics, Public Health & Occupational Health 2014/2015 #12;Epidemiology, Biostatistics and Occupational Health 2014-2015 Student

  4. Occupational therapy for multiple sclerosis

    Microsoft Academic Search

    E. M. J. Steultjens; J. Dekker; L. M. Bouter; M. Cardol; J. C. M. van de Nes; C. H. M. van den Ende

    2003-01-01

    Background: Multiple sclerosis (MS) patients are referred to occupational therapy with complaints about fatigue, limb weakness, alteration of upper extremity fine motor coordination, loss of sensation and spasticity that causes limitations in performance of activities of daily living and social participation. The primary purpose of occupational therapy is to enable individuals to participate in self-care, work and leisure activities that

  5. Agricultural Occupations Program Planning Guide.

    ERIC Educational Resources Information Center

    Hemp, Paul E.; Mayer, Leon

    The major program objectives of agricultural occupations courses are (1) to develop agricultural competencies needed by individuals engaged in or preparing to engage in production agriculture, and in agricultural occupations other than production agriculture; (2) to develop an understanding of the career opportunities in agriculture; (3) to…

  6. New Roles for Occupational Instructors.

    ERIC Educational Resources Information Center

    Campbell, Dale F.

    Changes in the future role of occupational instructors which will be brought about by advances in educational technology are illustrated by the description of the Advanced Instructional System (AIS), a complex approach to occupational training which permits large-scale application of individualized instruction through the use of computer-assisted…

  7. NATIONAL TRAUMATIC OCCUPATIONAL FATALITIES (NTOF)

    EPA Science Inventory

    The National Traumatic Occupational Fatalities (NTOF) surveillance system is a death certificate-based census of occupational injury deaths. Death certificates are obtained from the 50 States, New York City, and the District of Columbia for decedent's ages 16 years or older with ...

  8. Carpentry. Occupational Competency Analysis Profile.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. Vocational Instructional Materials Lab.

    This Occupational Competency Analysis Profile (OCAP) contains a competency list verified by expert workers and developed through a modified DACUM (Developing a Curriculum) involving business, industry, labor, and community agency representatives from Ohio. This OCAP identifies the occupational, academic, and employability skills (competencies)…

  9. CAREER GUIDE FOR DEMAND OCCUPATIONS.

    ERIC Educational Resources Information Center

    LEE, E.R.; WELCH, JOHN L.

    THIS PUBLICATION UPDATES THE "CAREER GUIDE FOR DEMAND OCCUPATIONS" PUBLISHED IN 1959 AND PROVIDES COUNSELORS WITH INFORMATION ABOUT OCCUPATIONS IN DEMAND IN MANY AREAS WHICH REQUIRE PREEMPLOYMENT TRAINING. IT PRESENTS, IN COLUMN FORM, THE EDUCATION AND OTHER TRAINING USUALLY REQUIRED BY EMPLOYERS, HIGH SCHOOL SUBJECTS OF PARTICULAR PERTINENCE TO…

  10. Business Financial Occupations: Skill Standards.

    ERIC Educational Resources Information Center

    Vocational Technical Education Consortium of States, Decatur, GA.

    This report organizes the information provided by 71 individuals in finance-related occupations in 11 states into skills inventories for persons in these jobs. The skills inventories contain the following sections: (1) occupation-specific knowledge (communication, mathematics, science); (2) workplace behaviors (work ethics, interpersonal…

  11. Occupational Licensing of Tower Climbers

    Microsoft Academic Search

    Michael S. Landa

    There is a renewed push for occupational licensing in the tower industry; proponents cite improved quality, improved safety and a number of other benefits that would result from licensing. The problem is previous and exhaustive occupational licensing research has proven these \\

  12. Situating Dignity in Occupational Science

    Microsoft Academic Search

    Abbey L. Marterella

    2007-01-01

    Dignity is an important concept in the everyday lives of human beings, yet its meaning remains elusive in occupational science and related scientific discourse. Occupations are believed to promote dignity and the humanistic nature of our science compels us to preserve it (Peloquin, 2005; Yerxa et al., 1989). For continued success in defining our discipline as one committed to human

  13. NATIONAL OCCUPATIONAL EXPOSURE SURVEY (NOES)

    EPA Science Inventory

    From 1981 to 1983, NIOSH conducted the National Occupational Exposure Survey (NOES) that collected data on potential occupational exposures to chemical, physical, and biological agents. The survey involved on-site visits to 4,490 establishments in 522 industry types [OMB 1972] em...

  14. Occupational Health Research in India

    Microsoft Academic Search

    Habibullah N SAIYED; Rajnarayan R TIWARI

    2004-01-01

    India being a developing nation is faced with traditional public health problems like communicable diseases, malnutrition, poor environmental sanitation and inadequate medical care. However, globalization and rapid industrial growth in the last few years has resulted in emergence of occupational health related issues. Agriculture (cultivators i.e. land owners+ agriculture labourers) is the main occupation in India giving employment to about

  15. A Model for Occupational Therapy

    Microsoft Academic Search

    Anne Cronin Mosey

    1980-01-01

    A model for occupational therapy, presented in this paper, is an elaboration on the biopsychosocial model outlined by the author in 1974. The conceptualization of this model is an attempt to provide a holistic approach to the philosophical and scientific foundation of the practice of occupational therapy. The structure of a model for the health profession is suggested, followed by

  16. [Occupational diseases in instrumental musicians].

    PubMed

    Zuskin, Eugenija; Mustajbegovi?, Jadranka; Zavali?, Marija; Bogadi-Sare, Ana; Pavlovi?, Mladen; Turci?, Nada

    2003-01-01

    Occupational diseases, work-related diseases and occupational stigma in professional musicians are discussed. Predominant diseases and symptoms related to various organic systems, such as musculoskeletal, neuromuscular, respiratory system, skin, mouth and teeth diseases, as well as the effect of noise and psychological stress, have been listed. The preventive measures in order to promote health of musicians are described in particular. PMID:12812021

  17. Career and Occupational Development Items.

    ERIC Educational Resources Information Center

    Education Commission of the States, Denver, CO. National Assessment of Educational Progress.

    The career and occupational development items contained in this document are part of a kit consisting of four documents which bring together different types of items that measure a number of career and occupational development (COD) objectives developed by the National Assessment of Educational Progress (NAEP). (NAEP--which completed a national…

  18. Occupational Analysis of Educational Planning.

    ERIC Educational Resources Information Center

    Braden, Paul V.; Paul, Krishan

    The book deals comprehensively with occupational analysis, which is defined as the means for identifying and organizing that part of instructional content which is relevant to targeted performance situations. Occupational analysis yields useful information for instructional needs and helps to determine critical performance aspects warranting…

  19. Achieving Quality in Occupational Health

    NASA Technical Reports Server (NTRS)

    O'Donnell, Michele (Editor); Hoffler, G. Wyckliffe (Editor)

    1997-01-01

    The conference convened approximately 100 registered participants of invited guest speakers, NASA presenters, and a broad spectrum of the Occupational Health disciplines representing NASA Headquarters and all NASA Field Centers. Centered on the theme, "Achieving Quality in Occupational Health," conferees heard presentations from award winning occupational health program professionals within the Agency and from private industry; updates on ISO 9000 status, quality assurance, and information technologies; workshops on ergonomics and respiratory protection; an overview from the newly commissioned NASA Occupational Health Assessment Team; and a keynote speech on improving women's health. In addition, NASA occupational health specialists presented 24 poster sessions and oral deliveries on various aspects of current practice at their field centers.

  20. Occupational Noise Exposure of Operators of Heavy Trucks

    Microsoft Academic Search

    Baily Seshagiri

    1998-01-01

    Over 400 measurements were taken across Canada to assess the noise exposure of truck operators. The exposure of the driver was evaluated using both 3-dB (Leq) and 5-dB (L5dB) exchange rates. Driving with windows closed and radio not operating resulted in the lowest exposure. The drivers' Leq ranged from 78 to 89 dBA, with a mean of 82.7 dBA; operating

  1. Proper sling selection and application while using patient lifts.

    PubMed

    Baptiste, Andrea; McCleerey, Michelle; Matz, Mary; Evitt, Celinda P

    2008-01-01

    In response to staff shortages, an aging clinical workforce, and research on safe patient handling, manufacturers have provided an extensive array of patient-lifting technology, including ceiling, floor-based, and sit-to-stand lifts as well as slings that are required for their use. Expanded choice, however, may pose challenges to both healthcare facilities and individual clinicians. These challenges, if not successfully resolved, can preclude the consistent, safe, and efficient use of patient-handling devices. This article provides nurses and other direct patient care providers with a heightened awareness of the challenges to appropriate sling and lift use in rehabilitation and other clinical settings. A new way to categorize slings is introduced, and guidelines for safely evaluating and using slings for different patient-handling tasks are offered. PMID:18236889

  2. Experimental and simulated control of lift using trailing edge devices

    NASA Astrophysics Data System (ADS)

    Cooperman, A.; Blaylock, M.; van Dam, C. P.

    2014-12-01

    Two active aerodynamic load control (AALC) devices coupled with a control algorithm are shown to decrease the change in lift force experienced by an airfoil during a change in freestream velocity. Microtabs are small (1% chord) surfaces deployed perpendicular to an airfoil, while microjets are pneumatic jets with flow perpendicular to the surface of the airfoil near the trailing edge. Both devices are capable of producing a rapid change in an airfoil's lift coefficient. A control algorithm for microtabs has been tested in a wind tunnel using a modified S819 airfoil, and a microjet control algorithm has been simulated for a NACA 0012 airfoil using OVERFLOW. In both cases, the AALC devices have shown the ability to mitigate the changes in lift during a gust.

  3. Epitaxial lift-off of thin InAs layers

    SciTech Connect

    Fastenau, J.; Tuttle, G. [Iowa State Univ., Ames, IA (United States); Oezbay, E.; Laabs, F. [Ames Lab., IA (United States)]|[Iowa State Univ., Ames, IA (United States)

    1995-06-01

    We describe the use of the epitaxial lift-off technique to remove thin layers of InAs from the GaAs substrates on which they were grown and subsequently bonded to glass and silicon substrates. Lift-off was accomplished by taking advantage of the high etching selectivity between AlSb and InAs in an aqueous hydrofluoric acid etching solution, allowing a thin layer of AlSb to serve a sacrificial layer to facilitate the lift-off of the InAs. The InAs layers were transferred with little measurable effect on the electrical and structural properties of the films, as evidenced by Hall effect and x-ray measurements. The technique can easily be extended to transfer more-complex GaSb/AlSb/InAs structures. 6 refs., 2 figs.

  4. Lifting and protecting residential structures from subsidence damage using airbags

    SciTech Connect

    Triplett, T.L.; Bennett, R.M. [Univ. of Tennessee, Knoxville, TN (United States). Dept. of Civil and Environmental Engineering

    1998-12-31

    Conventional practice in protecting residential structures from subsidence damage concentrates on saving the superstructure. The foundation is sacrificed, even though it represents the structural component with the greatest replacement cost. In this study, airbags were used to lift a 20 ft x 30 ft structure to test their ability to protect both the foundation and superstructure from ground settlement. Two contiguous sides of the test foundation were unreinforced, and the other two contiguous sides incorporated footing and wall reinforcement. The airbags successfully lifted the structure without causing damage, even on the unreinforced sides. This paper gives a procedure for determining airbag spacing, and describes installation and operation techniques of the airbags. The paper then focuses on the performance of the airbags in lifting the structure, and shows that airbags can preserve existing foundations during subsidence movements.

  5. Improvements in linked-spar motion-compensated lifting system

    NASA Astrophysics Data System (ADS)

    Olsen, R. A.; Cuthbertson, R. A.

    1984-10-01

    An improved system for operating a lifting cable over the side of a ship at sea in which a spar buoy having an adjustable lifting capacity is coupled to the shop by a rigid linkage which is free to pivot on an axis attached to the ship deck, and operates to decouple the motion of the ship from lifting cable. The spar buoy is attached to a gimbal sheave assembly having a disengageable connector and tension line for drawing the connector into engagement with a mating socket at the outward end of a linkage boom. A narrow upper section of the spar buoy is provided with a plurality of vertical tubes and valves which by flooding or evacuation operate to vary the effective water plane area of the buoy for continual fine tuning and optimally adjusting of its natural heave mode characteristic frequency.

  6. Tool for use in lifting pin supported objects

    NASA Technical Reports Server (NTRS)

    Marzek, R. A.; Read, W. S. (inventors)

    1974-01-01

    A tool for use in lifting a pin-supported, electronic package mounted in juxtaposition with the surface of an electronic circuit board is described. The tool is configured to be received beneath a pin-supported package and is characterized by a manually operable linkage, including an elongated, rigid link is supported for axial reciprocation and a pivotal link pinned to the body and supported for oscillation induced in response to axial motion imparted to the rigid link. A lifting plate is pivotally coupled to the distal end of the pivotal link so that oscillatory motion imparted to the pivotal link serves to move the plate vertically for elevating the plate into lifting engagement with the electronic package positioned thereabove.

  7. An unsteady lifting surface theory for ducted fan blades

    SciTech Connect

    Chi, R.M. (United Technologies Research Center, East Hartford, CT (United States). Dept. of Propulsion and Flight Systems)

    1993-01-01

    A frequency domain lifting surface theory is developed to predict the unsteady aerodynamic pressure loads on oscillating blades of a ducted subsonic fan. The steady baseline flow as observed in the rotating frame of reference is the helical flow dictated by the forward flight speed and the rotational speed of the fan. The unsteady perturbation flow, which is assumed to be potential, is determined by solving an integral equation that relates the unknown jump in perturbation velocity potential across the lifting surface to the upwash velocity distribution prescribed by the vibratory motion of the blade. Examples of unsteady pressure distributions are given to illustrate the differences between the three-dimensional lifting surface analysis and the classical two-dimensional strip analysis. The effects of blade axial bending, bowing (i.e., circumferential bending), and sweeping on the unsteady pressure load are also discussed.

  8. 24 CFR 582.315 - Occupancy agreements.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...SECRETARY FOR COMMUNITY PLANNING AND DEVELOPMENT, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT COMMUNITY FACILITIES SHELTER PLUS CARE Program Requirements § 582.315 Occupancy agreements. (a) Initial occupancy agreement....

  9. 24 CFR 582.315 - Occupancy agreements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...SECRETARY FOR COMMUNITY PLANNING AND DEVELOPMENT, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT COMMUNITY FACILITIES SHELTER PLUS CARE Program Requirements § 582.315 Occupancy agreements. (a) Initial occupancy agreement....

  10. 24 CFR 582.315 - Occupancy agreements.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...SECRETARY FOR COMMUNITY PLANNING AND DEVELOPMENT, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT COMMUNITY FACILITIES SHELTER PLUS CARE Program Requirements § 582.315 Occupancy agreements. (a) Initial occupancy agreement....

  11. 24 CFR 582.315 - Occupancy agreements.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...SECRETARY FOR COMMUNITY PLANNING AND DEVELOPMENT, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT COMMUNITY FACILITIES SHELTER PLUS CARE Program Requirements § 582.315 Occupancy agreements. (a) Initial occupancy agreement....

  12. 24 CFR 582.315 - Occupancy agreements.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...SECRETARY FOR COMMUNITY PLANNING AND DEVELOPMENT, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT COMMUNITY FACILITIES SHELTER PLUS CARE Program Requirements § 582.315 Occupancy agreements. (a) Initial occupancy agreement....

  13. Occupational ergonomics in space

    NASA Technical Reports Server (NTRS)

    Stramler, J.

    1992-01-01

    Ergonomics is often defined simply as the study of work. Related or synonymous terms include human factors, human engineering, engineering psychology, and others. Occupational ergonomics is a term that has been proposed to describe the study of the working environment, including the physical consequences resulting from having an improperly designed workplace. The routine space working environment presents some problems not found in the typical Earthbound workplace. These include radiation, intravehicular contamination/pollution, temperature extremes, impact with other objects, limited psychosocial relationships, sensory deprivation, and reduced gravity. These are important workplace considerations, and may affect astronauts either directly at work or at some point during their life as a result of their work under these conditions. Some of the major issues associated with each of these hazards are presented.

  14. Lift outs: how to acquire a high-functioning team.

    PubMed

    Groysberg, Boris; Abrahams, Robin

    2006-12-01

    More and more, expanding companies are hiring high-functioning groups of people who have been working together effectively within one company and can rapidly come up to speed in a new environment. These lifted-out teams don't need to get acquainted with one another or to establish shared values, mutual accountability, or group norms; their long-standing relationships and trust help them make an impact very quickly. Of course, the process is not without risks: A failed lift out can lead to loss of money, opportunity, credibility, and even native talent. Boris Groysberg and Robin Abrahams studied more than 40 high-profile moves and interviewed team leaders in multiple industries and countries to examine the risks and opportunities that lift outs present. They concluded that, regardless of industry, nationality, or size of the team, a successful lift out unfolds over four consecutive, interdependent stages that must be meticulously managed. In the courtship stage, the hiring company and the leader of the targeted team determine whether the proposed move is, in fact, a good idea, and then define their business goals and discuss strategies. At the same time, the team leader discusses the potential move with the other members of his or her group to assess their level of interest and prepare them for the change. The second stage involves the integration of the team leader with the new company's top leadership. This part of the process ensures the team's access to senior executives-the most important factor in a lift out's success. Operational integration is the focus of the third stage. Ideally, teams will start out working with the same or similar clients, vendors, and industry standards. The fourth stage entails full cultural integration. To succeed, the lifted-out team members must be willing to re-earn credibility by proving their value and winning their new colleagues' trust. PMID:17183798

  15. Occupational cancer in Britain

    PubMed Central

    Hutchings, Sally J; Rushton, Lesley

    2012-01-01

    An approach using the attributable fraction (AF) has been developed to estimate the current burden of occupational cancer in Britain. The AF combines the relative risk (RR) associated with exposure with the proportion exposed. For each cancer–exposure pairing, the RR is selected from key epidemiological literature such as an industry, or population-based study, meta-analysis or review. The CARcinogen EXposure (CAREX) database provides point estimates for the number of workers exposed to a range of carcinogens; alternative sources are national surveys such as the Labour Force Survey and Census of Employment. The number of workers exposed are split between high and low exposure levels matched to appropriate RRs from the literature. The relevant period for cancer development during which exposure occurred is defined as the risk exposure period (REP). Estimation of the numbers ever exposed over the REP takes into account the changes in the number of people employed in primary and manufacturing industry and service sectors in Britain where appropriate, and adjustment is made for staff turnover over the period and for life expectancy. National estimates of the population ever of working age during the REP are used for the proportion denominator. Strategies have been developed to combine exposure AFs correctly while avoiding double counting and minimising bias. The AFs are applied to national cancer deaths and registrations to obtain occupation-attributable cancer numbers. The methods are adaptable for other diseases and other geographies, and are also adaptable to more sophisticated modelling if better exposure and dose–response data are available. PMID:22710683

  16. Occupational seafood allergy: a review

    PubMed Central

    Jeebhay, M; Robins, T; Lehrer, S; Lopata, A

    2001-01-01

    BACKGROUND—Recent years have seen increased levels of production and consumption of seafood, leading to more frequent reporting of allergic reactions in occupational and domestic settings. This review focuses on occupational allergy in the fishing and seafood processing industry.?REVIEW—Workers involved in either manual or automated processing of crabs, prawns, mussels, fish, and fishmeal production are commonly exposed to various constituents of seafood. Aerosolisation of seafood and cooking fluid during processing are potential occupational situations that could result in sensitisation through inhalation. There is great variability of aerosol exposure within and among various jobs with reported allergen concentrations ranging from 0.001 to 5.061(µg/m3). Occupational dermal exposure occurs as a result of unprotected handling of seafood and its byproducts. Occupational allergies have been reported in workers exposed to arthropods (crustaceans), molluscs, pisces (bony fish) and other agents derived from seafood. The prevalence of occupational asthma ranges from 7% to 36%, and for occupational protein contact dermatitis, from 3% to 11%. These health outcomes are mainly due to high molecular weight proteins in seafood causing an IgE mediated response. Cross reactivity between various species within a major seafood grouping also occurs. Limited evidence from dose-response relations indicate that development of symptoms is related to duration or intensity of exposure. The evidence for atopy as a risk factor for occupational sensitisation and asthma is supportive, whereas evidence for cigarette smoking is limited. Disruption of the intact skin barrier seems to be an important added risk factor for occupational protein contact dermatitis.?CONCLUSION—The range of allergic disease associated with occupational exposure to crab is well characterised, whereas for other seafood agents the evidence is somewhat limited. There is a need for further epidemiological studies to better characterise this risk. More detailed characterisation of specific protein antigens in aerosols and associated establishment of dose-response relations for acute and chronic exposure to seafood; the respective roles of skin contact and inhalational exposure in allergic sensitisation and cross reactivity; and the contribution of host associated factors in the development of occupational seafood allergies are important areas for future research.???Keywords: occupational seafood allergy; occupational asthma; protein contact dermatitis PMID:11511741

  17. High lift force with 275 Hz wing beat in MFI

    Microsoft Academic Search

    Erik Steltz; Srinath Avadhanula; Ronald S. Fearing

    2007-01-01

    Abstract—The Micromechanical,Flying Insect (MFI) project aims to create a 25 mm,(wingtip to wingtip) flapping wing micro air vehicle inspired by the aerodynamics,of insect flight. A key challenge is generating,appropriate,wing,trajectories. Previous work,[1] showed,a lift of 506 µN at 160 Hz using feedforward control. In this paper, refinements to the MFI design including those in [2] increased,wing,beat frequency,to 275 Hz and,lift to

  18. Noise exposure reduction of advanced high-lift systems

    NASA Technical Reports Server (NTRS)

    Haffner, Stephen W.

    1995-01-01

    The purpose of NASA Contract NAS1-20090 Task 3 was to investigate the potential for noise reduction that would result from improving the high-lift performance of conventional subsonic transports. The study showed that an increase in lift-to-drag ratio of 15 percent would reduce certification noise levels by about 2 EPNdB on approach, 1.5 EPNdB on cutback, and zero EPNdB on sideline. In most cases, noise contour areas would be reduced by 10 to 20 percent.

  19. I.F.H. Quarter Module Lifting Fixture

    SciTech Connect

    May, M.P.; /Fermilab

    1987-04-28

    The main purpose of this report is to explain the procedure for lifting the I.F.H. quarter module from a 'prone' position to a 'standing' position and then into the liquid nitrogen test vessel. The main objective for the design of the lifting fixtures was simplicity. The fixtures are to be made of .75 inch thick stainless steel plates which is a stock item for the steel companies. The fixtures are stainless steel so they will be able to keep their structural integrity when immersed in the liquid nitrogen.

  20. Experimental analysis of the mechanics of reverse circulation air lift 

    E-print Network

    Zeineddine, Talal Ibrahim

    1980-01-01

    Atmospheric pressure, psia Ratio of specific heats 2 Gravitational acceleration, ft/sec Lift, ft Altitude, ft Mixture density, ibm/ft (p = uv + (1-a)p ) 3 PL M D Friction factor Density of liquid, ibm/ft 3 &A ' '4 Mixture velocity, ft/sec (VM = ) A..., N. H. , 1971, pp. 31-1 through 21-14. 6 M. Henriksen, S. P. Goplen and T. F. Barron, Numerical methods for determining air requirements for reverse air lift, AINE Paper 1%. 77-F-319. 45 APPESIX A Finding Local Void Fractions, Time Averaged Local...

  1. The Skinny on Success: Body Mass, Gender and Occupational Standing Across the Life Course.

    PubMed

    Glass, Christy M; Haas, Steven A; Reither, Eric N

    2010-06-01

    Several studies have analyzed the impact of obesity on occupational standing. This study extends previous research by estimating the influence of body mass on occupational attainment over three decades of the career using data from the Wisconsin Longitudinal Study. In a series of covariance structure analyses, we considered three mechanisms that may alter the career trajectories of heavy individuals: (1. employment-based discrimination, (2. educational attainment, and (3. marriage market processes. Unlike previous studies, we found limited evidence that employment-based discrimination impaired the career trajectories of either men or women. Instead, we found that heavy women received less post-secondary schooling than their thinner peers, which in turn adversely affected their occupational standing at each point in their careers. PMID:20936045

  2. Display Advertising Impact: Search Lift and Social P. Papadimitriou1

    E-print Network

    Chang, Edward Y.

    Display Advertising Impact: Search Lift and Social Influence P. Papadimitriou1 P. Krishnamurthy2 R study the impact of display advertising on user search behav- ior using a field experiment. In such an experiment, the treatment group users are exposed to some display advertising campaign, while the control

  3. Detail of counterweight wire rope attachment to lift span at ...

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

    Detail of counterweight wire rope attachment to lift span at southwest corner. The plates with three pins serve to equalize the forces on the counterweight ropes. - Potomac Edison Company, Chesapeake & Ohio Canal Bridge, Spanning C & O Canal South of U.S. 11, Williamsport, Washington County, MD

  4. ADVANCED HIGH LIFT CFD ANALYSIS AND DESIGN TOOLS

    Microsoft Academic Search

    R. Rudnik; S. Wallin

    2004-01-01

    This contribution highlights development, validation, and application of European CFD codes for high lift aerodynamics. Major contributions to the status of CFD have been achieved in EC funded European projects, such as EUROLIFT and HiAer. Concerning the flow field analysis, progress in numerical methods as well as computer resources resulted in the ability of treating complete 3D transport aircraft high

  5. Video Coding with Motion-Compensated Lifted Wavelet Transforms

    E-print Network

    Flierl, Markus

    Video Coding with Motion-Compensated Lifted Wavelet Transforms Markus Flierl 1 and Bernd Girod-constrained 3-D wavelet Email addresses: mflierl@ieee.org (Markus Flierl), bgirod@stanford.edu (Bernd Girod). 1 M. Flierl visited the Information Systems Laboratory, Stanford University, and is now

  6. Review of V/STOL lift/cruise fan technology

    NASA Technical Reports Server (NTRS)

    Rolls, L. S.; Quigley, H. C.; Perkins, R. G., Jr.

    1976-01-01

    This paper presents an overview of supporting technology programs conducted to reduce the risk in the joint NASA/Navy Lift/Cruise Fan Research and Technology Aircraft Program. The aeronautical community has endeavored to combine the low-speed and lifting capabilities of the helicopter with the high-speed capabilities of the jet aircraft; recent developments have indicated a lift/cruise fan propulsion system may provide these desired characteristics. NASA and the Navy have formulated a program that will provide a research and technology aircraft to furnish viability of the lift/cruise fan aircraft through flight experiences and obtain data on designs for future naval and civil V/STOL aircraft. The supporting technology programs discussed include: (1) design studies for operational aircraft, a research and technology aircraft, and associated propulsion systems; (2) wind-tunnel tests of several configurations; (3) propulsion-system thrust vectoring tests; and (4) simulation. These supporting technology programs have indicated that a satisfactory research and technology aircraft program can be accomplished within the current level of technology.

  7. Lifting Planar Graphs to Realize Integral 3-Polytopes

    E-print Network

    Fuchs, Gunter

    ´e Schulz, February 2008 #12;Dedicated to my son, Peer. #12;#12;Abstract Lifting planar embeddings of the largest coordinate from O(218n2 ) to O(27.55n ). A new generalized version of Tutte's spring embedding- den wir die Technik zum Heben planarer Graphen auf geometrische Pro- blemstellungen anwenden. Als

  8. Evaluating Training Approaches for the Revised NIOSH Lifting Equation

    ERIC Educational Resources Information Center

    Bowles, William, Jr.

    2012-01-01

    The goal of this study was to determine whether the Revised NIOSH Lifting Equation (RNLE) CD-ROM training program, when used without an instructor, could adequately train RNLE users to properly understand and correctly apply the RNLE. If so, then it can be used to fill a current gap in delivering training to both health and safety professionals,…

  9. Corticospinal Control during Reach, Grasp, and Precision Lift in Man

    Microsoft Academic Search

    R. N. Lemon; R. S. Johanss; G. Westling

    1995-01-01

    Transcranial magnetic brain stimulation (TMS) was used to assess the influence of the corticospinal system on motor output in seven human subjects during a task in which they had to reach out, grasp, and lift an object. Stimuli, directed at the hand area of the motor cortex, were delivered at eight defined points during the task: during reach, at grip

  10. LIFTS OF CONVEX SETS AND CONE FACTORIZATIONS 1 ...

    E-print Network

    2011-11-13

    Nov 13, 2011 ... Theorem 2.9, we characterize the existence of a symmetric K-lift of ... exciting new result of Fiorini, Massar, Pokutta, Tiwary and de Wolf ... cut, stable set and traveling salesman polytopes for which there can be no polyhedral ...

  11. Assessment of the sinus lift operation by magnetic resonance imaging

    Microsoft Academic Search

    Figen Cizmeci Senel; Serpil Duran; Onur Icten; Izlem Izbudak; Fulya Cizmeci

    2006-01-01

    ObjectivesVertical bone loss in edentulous maxillary alveolar processes may necessitate a sinus lift before the placement of dental implants. We have measured and assessed maxillary sinuses meticulously before the operation and evaluated the postoperative results of the operation with magnetic resonance imaging (MRI).

  12. Endoscopic lift of the maxillary sinus floor in Beagles.

    PubMed

    Zheng, JiSi; Zhang, ShanYong; Lu, ErYi; Yang, Chi; Zhang, WenJie; Zhao, JingYang

    2014-11-01

    The aim of this study was to introduce a modified endoscopic lift of the floor of the maxillary sinus in Beagles. Twelve operations (bilateral and randomly chosen) were done in 6 Beagles each in the test group (modified endoscopic operation), and the control group, in which the operation was done with an osteotome. All operations were evaluated by two indices of safety (perforation of the sinus membrane and nasal bleeding) and 3 effective indices (the intraoperative height after lifting, volume of bone grafts, and dislocation of the sinus grafts). The sinus membrane was not perforated and there were no nasal bleeds in either group. The intraoperative height after lifting was 13.7 (0.8) mm in the test group and 9.1 (0.5) mm in the control group, so it was significantly higher in the test group than the control group (p=0.0001). Similarly, the volume of bone graft was 0.9 (0.04) ml in the test group and 0.5 (0.02) ml in the control group (p=0.0001). The volume of the anterior and posterior bone grafts in the implant cavity in the test group did not differ significantly (p=0.102), while there were significant differences in the control group (p=0.002). Endoscopic lifting of the floor of the maxillary sinus is a safe and effective approach based on direct observation in Beagles. PMID:25174319

  13. Assessment of the sinus lift operation by magnetic resonance imaging

    Microsoft Academic Search

    Figen Cizmeci Senel; Serpil Duran; Onur Icten; Izlem Izbudak; Fulya Cizmeci

    Objectives: Vertical bone loss in edentulous maxillary alveolar processes may necessitate a sinus lift before the placement of dental implants. We have measured and assessed maxillary sinuses meticulously before the operation and evaluated the postoperative results of the operation with magnetic resonance imaging (MRI). Methods: Thirteen edentulous maxillary regions in eight patients were included in the study. The patients were

  14. The use of fibrin adhesive in sinus lift procedures

    Microsoft Academic Search

    Steven M Sullivan; Ronald A Bulard; Richard Meaders; M. K Patterson

    1997-01-01

    Sinus lift bone grafting has expanded the use of dental implants in reconstructions of the atrophic maxilla. Potential problems include sinus membrane tear, which can lead to graft infection and early failure. Attempts at managing sinus membrane perforations are often limited by difficulty of access, as well as by the friability of the soft tissue lining the sinus. Various techniques

  15. 13. OVERALL VIEW OF DOWNSTREAM FACE OF LIFT GATE SECTION ...

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

    13. OVERALL VIEW OF DOWNSTREAM FACE OF LIFT GATE SECTION (FROM EDGE OF COFFERDAM) WITH BOILERHOUSE AND TAINTER GATE SECTION IN BACKGROUND TO THE RIGHT. VIEW TO SOUTHEAST. - Starved Rock Locks & Dam, Illinois Waterway River mile 231, Peru, La Salle County, IL

  16. Complex multiplication and canonical lifts David R. Kohel

    E-print Network

    Kohel, David R.

    Complex multiplication and canonical lifts SAGA 2007 David R. Kohel The University of Sydney 7 mai 2007 #12;Complex Multiplication in Genus 1 The Main Theorem of Complex Multiplication gives the relation between ideal classes and abelian varieties. #12;Complex Multiplication in Genus 1 The Main

  17. Large xray room from crane ladder showing scissor lift for ...

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

    Large x-ray room from crane ladder showing scissor lift for x-ray equipment, view facing west-northwest - U.S. Naval Base, Pearl Harbor, Industrial X-Ray Building, Off Sixth Street, adjacent to and south of Facility No. 11, Pearl City, Honolulu County, HI

  18. Wavelet Lifting for Speckle Noise Reduction in Ultrasound Images

    E-print Network

    Raheja, Amar

    . The efficacy of this filter is demonstrated on both simulated and real medical ultrasound images. The result of research has been done for medical ultrasound speckle de-noising [2][8][10] using different typesWavelet Lifting for Speckle Noise Reduction in Ultrasound Images Yuan Chen, and Amar Raheja

  19. Person Authentication Using Learned Parameters of Lifting Wavelet Filters

    NASA Astrophysics Data System (ADS)

    Niijima, Koichi

    2006-10-01

    This paper proposes a method for identifying persons by the use of the lifting wavelet parameters learned by kurtosis-minimization. Our learning method uses desirable properties of kurtosis and wavelet coefficients of a facial image. Exploiting these properties, the lifting parameters are trained so as to minimize the kurtosis of lifting wavelet coefficients computed for the facial image. Since this minimization problem is an ill-posed problem, it is solved by the aid of Tikhonov's regularization method. Our learning algorithm is applied to each of the faces to be identified to generate its feature vector whose components consist of the learned parameters. The constructed feature vectors are memorized together with the corresponding faces in a feature vectors database. Person authentication is performed by comparing the feature vector of a query face with those stored in the database. In numerical experiments, the lifting parameters are trained for each of the neutral faces of 132 persons (74 males and 58 females) in the AR face database. Person authentication is executed by using the smile and anger faces of the same persons in the database.

  20. Minimal incision rhytidectomy (short scar face lift) with lateral SMASectomy

    Microsoft Academic Search

    Daniel C. Baker

    2001-01-01

    Minimal incision rhytidectomy has the primary advantages of preserving the posterior hairline and avoiding retroauricular scars. This short-scar face lift with lateral SMASectomy and platysma resection, performed by the author on more than 500 patients in the past 3 years, provides the versatility of traditional SMAS flap undermining and the safety and rapidity of SMAS plication.

  1. The use of sprayed fibrin glue for face lifts

    Microsoft Academic Search

    D. Marchac; E. Pugash; D. Gault

    1987-01-01

    The use of a fibrin and thrombin tissue glue administered in aerosol form has been evaluated in 65 patients undergoing a face lift. In 55 cases the glue was applied to the undermined areas bilaterally, and appeared to decrease postoperative oedema and bruising. In a further 10 cases the adhesive was used on one side only. In 5 of these

  2. Management of face lifts with progressive tension sutures

    Microsoft Academic Search

    Harlan Pollock; Todd Alan Pollock

    2003-01-01

    Background: Performance of deepr and more extensive dissections in face lift procedures has led to more complex procedures, a higher rate of reported complications, and more prolonged convalescence.Objective: We investigated the use of progressive tension sutures (PTSs) to achieve more controlled, safe, and secure skin flap management and improved aesthetic results.Methods: Defatting of the neck was performed by lipoplasty or

  3. Auxiliary lift propulsion system with oversized front fan

    Microsoft Academic Search

    O. T. Castells; J. E. Johnson; D. J. Rundell

    1980-01-01

    A propulsion system for use primarily in V\\/STOL aircraft is provided with a variable cycle, double bypass gas turbofan engine and a remote augmenter to produce auxiliary lift. The fan is oversized in air-pumping capability with respect to the cruise flight requirements of the remainder of the engine and a variable area, low pressure turbine is capable of supplying varying

  4. Based on Lifting Scheme Improve Double Adaptive Wavelet Transforms

    Microsoft Academic Search

    Guangchun Gao; Shengying Zhao; Hongli Zhu; Lina Shang

    2009-01-01

    Because of the better temporal and frequency properties, the wavelet linear approximation can approximate smooth signals very efficiently with the constant size filter. However, standard wavelet linear approximation techniques cannot achieve similar results for signal which are not smooth. Based on the adaptive lifting scheme with perfect reconstruction presented by G. Piella and the authorpsilas previous research, this paper proposed

  5. Novel architectures for the lifting-based discrete wavelet transform

    Microsoft Academic Search

    Hongyu Liao; Mrinal K. Mandal; Bruce F. Cockburn

    2002-01-01

    In this paper, we propose two modular and highly efficient architectures, the recursive architecture and the double scan architecture, for implementing the lifting-based discrete wavelet transform. The recursive architecture simultaneously processes all stages of the transform, while the double scan architecture processes two independent signals at the same time. Compared to other known architectures, both new architectures significantly improve the

  6. Atlantis is lifted from its transporter in the VAB

    NASA Technical Reports Server (NTRS)

    2001-01-01

    KENNEDY SPACE CENTER, Fla. -- In the transfer aisle of the Vehicle Assembly Building, the orbiter Atlantis is suspended vertically via overhead cranes. The orbiter will be rotated and lifted into high bay 1 where it will be stacked with its external tank and solid rocket boosters. Space Shuttle Atlantis is scheduled to launch on mission STS-104 in early July.

  7. A Classification of Lifts in Dance: Terminology and Biomechanical Principles

    ERIC Educational Resources Information Center

    Lafortune, Sylvain

    2008-01-01

    Despite the importance of lifts in Western theatrical dance, few reports have been published on the subject and few techniques established as good practice. Dancers usually learn partnering by trial and error, an approach that elicits both spectacular and inefficient results. To establish safer partnering practices, more efficient use of rehearsal…

  8. Lifting baselines to address the consequences of conservation success.

    PubMed

    Roman, Joe; Dunphy-Daly, Meagan M; Johnston, David W; Read, Andrew J

    2015-06-01

    Biologists and policymakers are accustomed to managing species in decline, but for the first time in generations they are also encountering recovering populations of ocean predators. Many citizens perceive these species as invaders and conflicts are increasing. It is time to celebrate these hard-earned successes and lift baselines for recovering species. PMID:26042680

  9. Supersolvable Frame-Matroid and Graphic-Lift Lattices by

    E-print Network

    Zaslavsky, Thomas

    Supersolvable Frame-Matroid and Graphic-Lift Lattices Abstract A geometric lattice is a frame if its matroid, possibly after enlargement, h* *as a basis of a classical root system. Using the fact that finitary frame matroids* * are the bias matroids of biased

  10. Shape memory alloy resetable spring lift for pedestrian protection

    Microsoft Academic Search

    Brian M. Barnes; Diann E. Brei; Jonathan E. Luntz; Kenneth Strom; Alan L. Browne; Nancy Johnson

    2008-01-01

    Pedestrian protection has become an increasingly important aspect of automotive safety with new regulations taking effect around the world. Because it is increasingly difficult to meet these new regulations with traditional passive approaches, active lifts are being explored that increase the \\

  11. 13. WEIGHING ROOM Fish were lifted up from tower by ...

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

    13. WEIGHING ROOM Fish were lifted up from tower by conveyor, controlled by buttons above the two sets of vertical electrical conduits. They entered the weighing room through the shielded window on the left (shielding missing from the window on the right), were weighed and then transported to the holding tanks. - Hovden Cannery, 886 Cannery Row, Monterey, Monterey County, CA

  12. Unsteady Lift Suppression with a Robust Closed Loop Controller

    E-print Network

    Dabiri, John O.

    to enhance aircraft maneuverability comes from the effects of unsteady aerodynamics and the substantial time the aerodynamic loads and the response to actua- tion. For example, the time delays in the lift response flow used a controller based on a quasi-steady model of the aerodynamics and actuator response

  13. Univalence Criteria for Lifts of Harmonic Mappings to Minimal Surfaces

    Microsoft Academic Search

    M. Chuaqui; P. Duren; B. Osgood

    2006-01-01

    A general criterion in terms of the Schwarzian derivative is given for global univalence of the Weierstrass--Enneper lift of a planar harmonic mapping. Results on distortion and boundary regularity are also deduced. Examples are given to show that the criterion is sharp. The analysis depends on a generalized Schwarzian defined for conformal metrics and on a Schwarzian introduced by Ahlfors

  14. LIFTING MCKAY GRAPHS AND RELATIONS TO PRIME EXTENSIONS

    E-print Network

    Schaps, Malka

    LIFTING MCKAY GRAPHS AND RELATIONS TO PRIME EXTENSIONS Mohammed Hasan Ali and Mary Schaps Abstract-TEX 1 #12;2 MOHAMMED HASAN ALI AND MARY SCHAPS There is, furthermore, a natural grading on b, compatible with the filtration by the power of the radical in the group algebra of the defect group. It is induced by the image V

  15. LIFTING MCKAY GRAPHS AND RELATIONS TO PRIME EXTENSIONS

    E-print Network

    Schaps, Malka

    LIFTING MCKAY GRAPHS AND RELATIONS TO PRIME EXTENSIONS Mohammed Hasan Ali and Mary Schaps Abstract and the Emmy Noether Research Institute for Mathematics of the Minerva Foundation of Germany. Typeset by A M S­T E X 1 #12; 2 MOHAMMED HASAN ALI AND MARY SCHAPS There is, furthermore, a natural grading on b

  16. 7. DETAIL OF LIFTING MACHINERY HOUSED UNDER THE APPROACH ROADWAY; ...

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

    7. DETAIL OF LIFTING MACHINERY HOUSED UNDER THE APPROACH ROADWAY; 38 HORSEPOWER ELECTRIC MOTOR IN LEFT-CENTER, RACK AND PINION GEAR TO THE RIGHT - Chicago River Bascule Bridge, West Cortland Street, Spanning North Branch of Chicago River at West Cortland Street, Chicago, Cook County, IL

  17. 6. DETAIL OF LIFTING MACHINERY HOUSED UNDER THE APPROACH ROADWAY; ...

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

    6. DETAIL OF LIFTING MACHINERY HOUSED UNDER THE APPROACH ROADWAY; 38 HORSEPOWER ELECTRIC MOTOR IN RIGHT-CENTER, RACK AND PINION GEAR TO THE LEFT - Chicago River Bascule Bridge, West Cortland Street, Spanning North Branch of Chicago River at West Cortland Street, Chicago, Cook County, IL

  18. 2. AERIAL VIEW OF THE VERTICAL LIFT BRIDGES SPANNING THE ...

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

    2. AERIAL VIEW OF THE VERTICAL LIFT BRIDGES SPANNING THE HACKENSACK RIVER, LOOKING NORTHEAST. THE PATH TRANSIT BRIDGE IS IN THE FOREGROUND, WITH THE CONRAIL (HAER No. NJ-43), NEWARK TURNPIKE, AND ERIE & LACKAWANNA RAILROAD (HAER No. NJ-42) BRIDGES BEHIND IT - Path Transit System Bridge, Spanning Hackensack River, Kearny, Hudson County, NJ

  19. Looking west at lift bridge, canal, and tow path, with ...

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

    Looking west at lift bridge, canal, and tow path, with U.S. Rt. 11 bridge in background. Remnant of spur track to R. Paul Smith Power Station is at left, and abandoned Western Maryland Railway right of way parallels canal at right. - Potomac Edison Company, Chesapeake & Ohio Canal Bridge, Spanning C & O Canal South of U.S. 11, Williamsport, Washington County, MD

  20. An unsteady lifting surface theory for ducted fan blades

    Microsoft Academic Search

    R. M. Chi

    1993-01-01

    A frequency domain lifting surface theory is developed to predict the unsteady aerodynamic pressure loads on oscillating blades of a ducted subsonic fan. The steady baseline flow as observed in the rotating frame of reference is the helical flow dictated by the forward flight speed and the rotational speed of the fan. The unsteady perturbation flow, which is assumed to

  1. 78 FR 3356 - Airworthiness Directives; Various Aircraft Equipped With Wing Lift Struts

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-16

    ...2120-AA64 Airworthiness Directives; Various Aircraft Equipped With Wing Lift Struts AGENCY...directive (AD) that applies to certain aircraft equipped with wing lift struts. The...identified in this proposed AD, contact Piper Aircraft, Inc., Customer Services, 2926...

  2. Two-dimensional, subsonic, flowfield analysis for arbitrary boundaries with lifting bodies 

    E-print Network

    Noack, Ralph Wayne

    1981-01-01

    special shapes, such as the lift- ing circular cylinder and Joukowski airfoils. Rather, for an arbitrary airfoil, the constant k must be obtained as part of the solution. Finally, for an inviscid, lifting flow, the specification of in- finity boundary...

  3. Maximal and sub-maximal functional lifting performance at different platform heights.

    PubMed

    Savage, Robert J; Jaffrey, Mark A; Billing, Daniel C; Ham, Daniel J

    2015-05-01

    Introducing valid physical employment tests requires identifying and developing a small number of practical tests that provide broad coverage of physical performance across the full range of job tasks. This study investigated discrete lifting performance across various platform heights reflective of common military lifting tasks. Sixteen Australian Army personnel performed a discrete lifting assessment to maximal lifting capacity (MLC) and maximal acceptable weight of lift (MAWL) at four platform heights between 1.30 and 1.70 m. There were strong correlations between platform height and normalised lifting performance for MLC (R(2) = 0.76 ± 0.18, p < 0.05) and MAWL (R(2) = 0.73 ± 0.21, p < 0.05). The developed relationship allowed prediction of lifting capacity at one platform height based on lifting capacity at any of the three other heights, with a standard error of < 4.5 kg and < 2.0 kg for MLC and MAWL, respectively. PMID:25420678

  4. Electrical Trades. Occupational Competency Analysis Profile.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. Vocational Instructional Materials Lab.

    This Occupational Competency Analysis Profile (OCAP), which is one of a series of OCAPs developed to identify the skills that Ohio employers deem necessary to entering a given occupation/occupational area, lists the occupational, academic, and employability skills required of individuals entering the electrical trades. The introduction explains…

  5. Occupational Stress and Coping among Nurses

    Microsoft Academic Search

    Purvi Parikh; Atish Taukari; Tanmay Bhattacharya

    2004-01-01

    This paper explores nurses’ occupational stressors and coping mechanisms. In nurses occupational stress appears to vary according to individual and job characteristics, and work-family conflict. Common occupational stressors among nurses are workload, role ambiguity, interpersonal relationships, and death and dying concerns. Emotional distress, burnout and psychological morbidity could also result from occupational stress. Nurses’ common coping mechanisms include problem solving,

  6. Children's Sextyped Views of Traditional Occupational Roles.

    ERIC Educational Resources Information Center

    Barnhart, Ruth S.

    1983-01-01

    Examined children's views of traditional occupations in a study of 300 elementary school students who viewed photographs of 18 occupations. Results showed for most of the 18 occupational roles, students chose a traditional male or female role. The occupations of homemaker and firefighter received the most stereotyped scores. (JAC)

  7. A Participant Observer of Occupational Therapy

    Microsoft Academic Search

    Gary M. Katz

    1981-01-01

    This paper outlines the observations and experiences of a clinical psychologist who viewed occupational therapy from the perspective of educating occupational therapy students and who, prior to this experience, had relatively little contact with or understanding of occupational therapy. These observations result from the first year of experiences of being an assistant professor in a department of occupational therapy. This

  8. [Occupational morbidity of railway transport workers].

    PubMed

    Karetskaia, T D; Pfaf, V F; Chernov, O E

    2015-01-01

    The authors present results of medical social monitoring of occupationalhazards that are the most prevalent in railway occupations workers, statistic data on occupational morbidity of railway transport workers over last 10 years. The article covers major causes of unfavorable effects resulting from occupational hazards in various workers categories. Dynamics of occupational morbidity parameters and its structure concerning separate nosologic entities are analyzed. PMID:25826875

  9. Occupational Information 1990/91. Volume II.

    ERIC Educational Resources Information Center

    Nebraska Univ., Lincoln. Nebraska Career Information System.

    The Nebraska Occupational Information books (volumes I and II) contain information about 386 different occupations in the state and answer questions about specific occupations in detail. The descriptions are arranged according to a U.S. Department of Labor classification system, with occupational titles clustered in general groups of selected…

  10. Emergy of the Occupations. Chapter 43

    EPA Science Inventory

    In this paper we calculated the emergy contributed to the economy of the United States in the work done by the workers of 558 occupations in 2008. We determined the empower (semj/yr) delivered by an individual engaged in each occupation, the transformity of the occupation?s work ...

  11. Environmental Occupational Health Protection Laws

    E-print Network

    Ashford, Nicholas

    2008-01-01

    The manufacturing, processing, and use of chemicals and materials in industrial, workplaces are often accompanied by environmental, health, and safety hazards and risks. Occupational and environmental factors cause or ...

  12. Occupational Therapist Assistants and Aides

    MedlinePLUS

    ... a high school diploma or equivalent. Education and Training People interested in becoming an occupational therapy assistant ... all workers was $34,750. On-the-job Training Additional training needed (postemployment) to attain competency in ...

  13. Policy perspectives on occupational stress.

    PubMed

    O'Keefe, Louise C; Brown, Kathleen C; Christian, Becky J

    2014-10-01

    Occupational stress is a major physical and mental hazard for many workers and has been found to contribute to cardiovascular disease, musculoskeletal disorders, mood disturbances, workplace injuries, and mental health problems. Health care utilization related to these physical and mental health problems costs employers billions of dollars annually. To combat this problem, employers should adopt a preventive approach and institute organizational and administrative changes that require the participation of both management and workers. This article reviews policies that could impact the quality of work life and influence organizational changes needed to achieve occupational health and safety. Occupational health nurses play a vital role in designing and implementing policies to improve work environments and reduce occupational stress. [Workplace Health Saf 2014;62(10):432-438.]. PMID:25139784

  14. 2014OCCUPATIONAL & ENVIRONMENTAL MEDICINE SYMPOSIUM

    E-print Network

    Leistikow, Bruce N.

    Endowment Occupational Hearing Loss: Practical Approaches to Evaluation and Management Rodney C. Diaz, MD UC Health System Prevention of Infectious Disease in Health Care Workers Craig F. Conlon, MD, PhD Kaiser

  15. Environmental Studies & Ecology Sample Occupations

    E-print Network

    Ronquist, Fredrik

    Biologist Animal Occupations Biologist Business Owner Chemical Technician Chemist Civil Engineer Lawyer Environment Policy Analyst Environmental Specialist Field Chemist Fish & Game Warden Fish Farmer Opportunities in Civil Engineering Careers .....IIB 17-2051 H3 Opportunities in Energy Careers

  16. Cost-Effective Integration of Efficient Low-Lift Base Load Cooling Equipment

    SciTech Connect

    Jiang, Wei; Winiarski, David W.; Katipamula, Srinivas; Armstrong, Peter R.

    2008-01-14

    The long-term goal of DOE’s Commercial Buildings Integration subprogram is to develop cost-effective technologies and building practices that will enable the design and construction of net Zero Energy Buildings — commercial buildings that produce as much energy as they use on an annual basis — by 2025. To support this long-term goal, DOE further called for — as part of its FY07 Statement of Needs — the development by 2010 of “five cost-effective design technology option sets using highly efficient component technologies, integrated controls, improved construction practices, streamlined commissioning, maintenance and operating procedures that will make new and existing commercial buildings durable, healthy and safe for occupants.” In response, PNNL proposed and DOE funded a scoping study investigation of one such technology option set, low-lift cooling, that offers potentially exemplary HVAC energy performance relative to ASHRAE Standard 90.1-2004. The primary purpose of the scoping study was to estimate the national technical energy savings potential of this TOS.

  17. Injury Prevention for Ski-Area Employees: A Physiological Assessment of Lift Operators, Instructors, and Patrollers

    PubMed Central

    2013-01-01

    Background. Momentary lapses in concentration contribute to workplace accidents. Given that blood glucose (BG) and hydration levels have been shown to affect vigilance, this study proposed to investigate these parameters and functional movement patterns of ski-resort workers and to determine whether an educational program to stabilize BG and hydration and encourage joint stability had an effect in decreasing occupational injuries. Methods. Seventy-five instructors, patrollers and, lift-operators at five snowsport resorts were evaluated for BG, vigilance, workload, dietary/hydration practices, and functional-movement patterns. Injury rates were tabulated before and after an educational program for nutrition and functional-movement awareness and compared to other resorts. Results. Workers showed poor stability at the lumbar spine, knee, and shoulder. BG levels were normal but variable (%CV?=?14 ± 6). Diets were high in sugar and fat and low in water and many nutrients. Medical Aid and Lost Time claims declined significantly by 65.1 ± 20.0% (confidence interval ?90.0%??? ? ?40.2%) in resorts that used the educational program whereas four control resorts not using the program experienced increases of 33.4 ± 42.9% (confidence interval ?19.7%??? ? ?86.7%; F[2,12]?=?21.35, P < 0.0001 ) over the same season. Conclusion. Provision of snowsport resort workers with educational programs encouraging hydration, diet to stabilize BG, and functional-movement awareness was effective in reducing worksite injuries in this population. PMID:23998119

  18. 1998-99 Occupational Outlook Handbook

    NSDL National Science Digital Library

    United States. Bureau of Labor Statistics.

    1998-01-01

    US occupations are featured in this information-rich resource from the Bureau of Labor Statistics. The 1998-9 Occupational Outlook Handbook provides the latest edition of a guide to 250 occupations from able seaman to zoologist. Users can browse an alphabetical index or any of eleven occupational clusters, or search the resource by keyword. Each occupation contains a thumbnail sketch of important features as well as information about the nature of the work, working conditions, employment, training, the job outlook, earnings, and related occupations. This is an excellent source of relevant, condensed occupational information.

  19. Cytogenetic Analysis and Occupational Health

    Microsoft Academic Search

    RADIM J. SRAM; Pavel Rössner

    This chapter summarizes the experiences of the Czech Hygiene Service from the mid-1970s until the present time, using cytogenetic\\u000a analysis as a biomarker of exposure. During this period, the method has proved its ability to detect an occupational hazard.\\u000a We observed a significant association between the increased frequency of aberrant cells and occupational exposure to carcinogens\\u000a and mutagens at a

  20. Occupational Stress Among Canadian Orthodontists

    Microsoft Academic Search

    Stephen F. Roth; Giseon Heo; Connie Varnhagen; Kenneth E. Glover; Paul W. Major

    2003-01-01

    The occupational stress associated with many professions, including general dentistry, has been well researched. An anonymous, self-administered, mail-out survey was distributed to Canadian orthodontists. The survey included 67 potential stressors, an overall occupational stress score, an overall job satisfaction scale, and items addressing various characteristics of the respondents. The response rate was 51.2% (335\\/654). Pronounced differences were found between the