Science.gov

Sample records for air drag forces

  1. Measuring the force of drag on air sheared sessile drops

    NASA Astrophysics Data System (ADS)

    Milne, Andrew J. B.; Fleck, Brian; Amirfazli, Alidad

    2012-11-01

    To blow a drop along or off of a surface (i.e. to shed the drop), the drag force on the drop (based on flow conditions, drop shape, and fluid properties) must overcome the adhesion force between the drop and the surface (based on surface tension, drop shape, and contact angle). While the shedding of sessile drops by shear flow has been studied [Milne, A. J. B. & Amirfazli, A. Langmuir 25, 14155 (2009).], no independent measurements of the drag or adhesion forces have been made. Likewise, analytic predictions are limited to hemispherical drops and low air velocities. We present, therefore, measurements of the drag force on sessile drops at air velocities up to the point of incipient motion. Measurements were made using a modified floating element shear sensor in a laminar low speed wind tunnel to record drag force over the surface with the drop absent, and over the combined system of the surface and drop partially immersed in the boundary layer. Surfaces of different wettabilities were used to study the effects of drop shape and contact angles, with drop volume ranged between approximately 10 and 100 microlitres. The drag force for incipient motion (which by definition equals the maximum of the adhesion force) is compared to simplified models for drop adhesion such as that of Furmidge

  2. No Winglets: What a Drag...Argument for Adding Winglets to Large Air Force Aircraft

    DTIC Science & Technology

    2008-01-01

    22134-5068 MASTER OF MILITARY STUDIES NO WINGLETS : WHAT A DRAG... ARGUMENT FOR ADDING WINGLETS TO LARGE AIR FORCE AIRCRAFT ,SUBMITTED IN PARTIAL...currently valid OMB control number. 1. REPORT DATE 2008 2. REPORT TYPE 3. DATES COVERED 00-00-2008 to 00-00-2008 4. TITLE AND SUBTITLE No Winglets ...What a Drag...Argument for Adding Winglets to Large Air Force Aircraft 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR

  3. Liquid-Infused Surfaces with Trapped Air (LISTA) for Drag Force Reduction.

    PubMed

    Hemeda, A A; Tafreshi, H Vahedi

    2016-03-29

    Superhydrophobic (SHP) surfaces are known for their drag-reducing attributes thanks to their ability to trap air in their surface pores and thereby reduce the contact between water and the frictional solid area. SHP surfaces are prone to failure under elevated pressures or because of air-layer dissolution into the surrounding water. Slippery liquid-infused porous surfaces (SLIPS) or liquid-infused surfaces (LIS) in which the trapped air is replaced with a lubricant have been proposed in the literature as a way of eliminating the air dissolution problem as well as improving the surface stability under pressure. While an LIS surface has been shown to reduce drag for flow of water-glycerol mixture (ref 18), no significant drag reduction has yet been reported for the flow of water (a lower viscosity fluid) over LIS. In this concern, we have designed a new surface in which a layer of air is trapped underneath the infused lubricant to reduce the frictional forces preventing the LIS to provide drag reduction for water or any fluid with a viscosity less than that of the lubricant. Drag reduction performance of such surfaces, referred to here as liquid-infused surfaces with trapped air (LISTA), is predicted by solving the biharmonic equation for the water-oil-air three-phase system in transverse grooves with enhanced meniscus stability thanks to double-reentry designs. For the arbitrary dimensions considered in our proof-of-concept study, LISTA designs showed 20-37% advantage over their LIS counterparts.

  4. Miniature drag force anemometer

    NASA Technical Reports Server (NTRS)

    Krause, L. N.; Fralick, G. C.

    1977-01-01

    A miniature drag force anemometer is described which is capable of measuring dynamic velocity head and flow direction. The anemometer consists of a silicon cantilevered beam 2.5 mm long, 1.5 mm wide, and 0.25 mm thick with an integrated diffused strain gage bridge, located at the base of the beam, as the force measuring element. The dynamics of the beam are like that of a second order system with a natural frequency of about 42 kHz and a damping coefficient of 0.007. The anemometer can be used in both forward and reversed flow. Measured flow characteristics up to Mach 0.6 are presented along with application examples including turbulence measurements.

  5. Viscoelastic Drag Forces and Crossover from No-Slip to Slip Boundary Conditions for Flow near Air-Water Interfaces

    NASA Astrophysics Data System (ADS)

    Maali, A.; Boisgard, R.; Chraibi, H.; Zhang, Z.; Kellay, H.; Würger, A.

    2017-02-01

    The "free" water surface is generally prone to contamination with surface impurities, be they surfactants, particles, or other surface active agents. The presence of such impurities can modify flow near such interfaces in a drastic manner. Here we show that vibrating a small sphere mounted on an atomic force microscope cantilever near a gas bubble immersed in water is an excellent probe of surface contamination. Both viscous and elastic forces are exerted by an air-water interface on the vibrating sphere even when very low doses of contaminants are present. The viscous drag forces show a crossover from no-slip to slip boundary conditions while the elastic forces show a nontrivial variation as the vibration frequency changes. We provide a simple model to rationalize these results and propose a simple way of evaluating the concentration of such surface impurities.

  6. STS-76 Landing - Space Shuttle Atlantis Lands at Edwards Air Force Base, Drag Chute Deploy

    NASA Technical Reports Server (NTRS)

    1996-01-01

    The space shuttle Atlantis touches down on the runway at Edwards, California, at approximately 5:29 a.m. Pacific Standard Time after completing the highly successful STS-76 mission to deliver Astronaut Shannon Lucid to the Russian Space Station Mir. She was the first American woman to serve as a Mir station researcher. Atlantis was originally scheduled to land at Kennedy Space Center, Florida, but bad weather there both 30 and 31 March necessitated a landing at the backup site at Edwards. This photo shows the drag chute deployed to help the shuttle roll to a stop. Mission commander for STS-76 was Kevin P. Chilton, and Richard A. Searfoss was the pilot. Ronald M. Sega was payload commander and mission specialist-1. Mission specialists were Richard Clifford, Linda Godwin and Shannon Lucid. The mission also featured a spacewalk while Atlantis was docked to Mir and experiments aboard the SPACEHAB module. Space Shuttles are the main element of America's Space Transportation System and are used for space research and other space applications. The shuttles are the first vehicles capable of being launched into space and returning to Earth on a routine basis. Space Shuttles are used as orbiting laboratories in which scientists and mission specialists conduct a wide variety of scientific experiments. Crews aboard shuttles place satellites in orbit, rendezvous with satellites to carry out repair missions and return them to space, and retrieve satellites and return them to Earth for refurbishment and reuse. Space Shuttles are true aerospace vehicles. They leave Earth and its atmosphere under rocket power provided by three liquid-propellant main engines with two solid-propellant boosters attached plus an external liquid-fuel tank. After their orbital missions, they streak back through the atmosphere and land like airplanes. The returning shuttles, however, land like gliders, without power and on runways. Other rockets can place heavy payloads into orbit, but, they can only be

  7. Vertical variations of coral reef drag forces

    NASA Astrophysics Data System (ADS)

    Asher, Shai; Niewerth, Stephan; Koll, Katinka; Shavit, Uri

    2016-05-01

    Modeling flow in a coral reef requires a closure model that links the local drag force to the local mean velocity. However, the spatial flow variations make it difficult to predict the distribution of the local drag. Here we report on vertical profiles of measured drag and velocity in a laboratory reef that was made of 81 Pocillopora Meandrina colony skeletons, densely arranged along a tilted flume. Two corals were CT-scanned, sliced horizontally, and printed using a 3-D printer. Drag was measured as a function of height above the bottom by connecting the slices to drag sensors. Profiles of velocity were measured in-between the coral branches and above the reef. Measured drag of whole colonies shows an excellent agreement with previous field and laboratory studies; however, these studies never showed how drag varies vertically. The vertical distribution of drag is reported as a function of flow rate and water level. When the water level is the same as the reef height, Reynolds stresses are negligible and the drag force per unit fluid mass is nearly constant. However, when the water depth is larger, Reynolds stress gradients become significant and drag increases with height. An excellent agreement was found between the drag calculated by a momentum budget and the measured drag of the individual printed slices. Finally, we propose a modified formulation of the drag coefficient that includes the normal dispersive stress term and results in reduced variations of the drag coefficient at the cost of introducing an additional coefficient.

  8. Miniature drag-force anemometer

    NASA Technical Reports Server (NTRS)

    Krause, L. N.; Fralick, G. C.

    1977-01-01

    A miniature drag-force anemometer is described which is capable of measuring dynamic velocity head and flow direction. The anemometer consists of a silicon cantilever beam 2.5 mm long, 1.5 mm wide, and 0.25 mm thick with an integrated diffused strain-gage bridge, located at the base of the beam, as the force measuring element. The dynamics of the beam are like those of a second-order system with a natural frequency of about 42 kHz and a damping coefficient of 0.007. The anemometer can be used in both forward and reversed flow. Measured flow characteristics up to Mach 0.6 are presented along with application examples including turbulence measurements.

  9. Measuring the Drag Force on a Falling Ball

    NASA Astrophysics Data System (ADS)

    Cross, Rod; Lindsey, Crawford

    2014-03-01

    The effect of the aerodynamic drag force on an object in flight is well known and has been described in this and other journals many times. At speeds less than about 1 m/s, the drag force on a sphere is proportional to the speed and is given by Stokes' law. At higher speeds, the drag force is proportional to the velocity squared and is usually small compared with the gravitational force if the object mass is large and its speed is low. In order to observe a significant effect, or to measure the terminal velocity, experiments are often conducted with very light objects such as a balloon or coffee filter3 or muffin cup,4 or are conducted in a liquid rather than in air. The effect of the drag force can also be increased by increasing the surface area of the object.

  10. Proceedings of Workshop on Atmospheric Density and Aerodynamic Drag Models for Air Force Operations Held at Air Force Geophysics Laboratory on 20-22 October 1987. Volume 1

    DTIC Science & Technology

    1990-02-13

    Measurement of Upper Atmospheric Density 4.7 Determination of Atomic Oxygen Density and Temperature of the Thermosphere By Remote Sensing 4.8 Atmospheric...SENSING 1. Density 80-120 Km P. Hays (Univ. Mich) 2. Determination of Atomic Oxygen R. Sharna (AFGL/LSI) Density and Temperature of the Thermosphere by...Sydney) Effects of Surface Reflection Uncertainties 2. Direct Simulation Monte Carlo Drag J. Moss (NASA/LaRC) Predictions 3. In-Orbit Measurements of Atom

  11. Drag force in AdS/CFT

    SciTech Connect

    Gubser, Steven S.

    2006-12-15

    The AdS/CFT correspondence and a classical test string approximation are used to calculate the drag force on an external quark moving in a thermal plasma of N=4 super-Yang-Mills theory. This computation is motivated by the phenomenon of jet-quenching in relativistic heavy ion collisions.

  12. Measuring the Drag Force on a Falling Ball

    ERIC Educational Resources Information Center

    Cross, Rod; Lindsey, Crawford

    2014-01-01

    The effect of the aerodynamic drag force on an object in flight is well known and has been described in this and other journals many times. At speeds less than about 1 m/s, the drag force on a sphere is proportional to the speed and is given by Stokes' law. At higher speeds, the drag force is proportional to the velocity squared and is…

  13. Drag Force Anemometer Used in Supersonic Flow

    NASA Technical Reports Server (NTRS)

    Fralick, Gustave C.

    1998-01-01

    To measure the drag on a flat cantilever beam exposed transversely to a flow field, the drag force anemometer (beam probe) uses strain gauges attached on opposite sides of the base of the beam. This is in contrast to the hot wire anemometer, which depends for its operation on the variation of the convective heat transfer coefficient with velocity. The beam probe retains the high-frequency response (up to 100 kHz) of the hot wire anemometer, but it is more rugged, uses simpler electronics, is relatively easy to calibrate, is inherently temperature compensated, and can be used in supersonic flow. The output of the probe is proportional to the velocity head of the flow, 1/2 rho u(exp 2) (where rho is the fluid density and u is the fluid velocity). By adding a static pressure tap and a thermocouple to measure total temperature, one can determine the Mach number, static temperature, density, and velocity of the flow.

  14. Collisional effects on nonlinear ion drag force for small grains

    SciTech Connect

    Hutchinson, I. H.; Haakonsen, C. B.

    2013-08-15

    The ion drag force arising from plasma flow past an embedded spherical grain is calculated self-consistently and non-linearly using particle in cell codes, accounting for ion-neutral collisions. Using ion velocity distribution appropriate for ion drift driven by a force field gives wake potential and force greatly different from a shifted Maxwellian distribution, regardless of collisionality. The low-collisionality forces are shown to be consistent with estimates based upon cross-sections for scattering in a Yukawa (shielded) grain field, but only if non-linear shielding length is used. Finite collisionality initially enhances the drag force, but only by up to a factor of 2. Larger collisionality eventually reduces the drag force. In the collisional regime, the drift distribution gives larger drag than the shift distribution even at velocities where their collisionless drags are equal. Comprehensive practical analytic formulas for force that fit the calculations are provided.

  15. Backstroke swimming: exploring gender differences in passive drag and instantaneous net drag force.

    PubMed

    Formosa, Danielle P; Sayers, Mark Gregory Leigh; Burkett, Brendan

    2013-12-01

    This study explored and quantified gender differences in passive drag and instantaneous net drag force profile for elite backstroke swimmers (FINA points 938 ± 71). Nine female and ten male backstroke swimmers completed eight maximum speed trials. During the passive drag condition participants were towed at the speed achieved within the maximum effort backstroke swimming trials, while holding a supine stationary streamline position. The remaining trials, swimmers performed their natural swimming stroke, while attached to an assisted towing device. Male participant's passive (P < .001) and mean net drag force (P < .001) were significantly higher compared with female participants. In addition, there were no significant differences by gender between either the minimum or maximum net drag forces produced during the left and right arm strokes. Instantaneous net drag force profiles demonstrated differences within and between individuals and genders. The swimmers who recorded the fastest speed also recorded the smallest difference in net drag force fluctuations. The instantaneous net drag force profile within elite backstroke swimming provides further insight into stroke technique of this sport.

  16. Measurement of friction drag force on discontinuous glass and polymer fibers

    NASA Astrophysics Data System (ADS)

    Tresso, Riccardo; Munoz, David R.

    2000-09-01

    This article describes the development of a piezoelectric force transducer specially designed to measure the fluctuating drag force experienced by a discontinuous micro fiber immersed in a turbulent airflow. The newly designed measurement tool possesses a fundamental frequency of approximately 940 Hz with a resolution of 10-4 N. A correlation for the friction drag coefficient as a function of the Reynolds number was found. This equation is of similar form but with differing slope and intercept to that previously published for continuous fibers. Although the driving frequency of the flow system was underestimated, resulting in limited utility of the instrument to the fine scale forces imposed on micro fibers, the sensor provided a necessary measurement of average drag forces. It may also be a useful tool for measuring small forces with lower frequency excitation than observed among the micro fibers exposed to a turbulent air stream. This study represents a first attempt at measuring dynamic drag forces on discontinuous micro fibers.

  17. Drag force scaling for penetration into granular media.

    PubMed

    Katsuragi, Hiroaki; Durian, Douglas J

    2013-05-01

    Impact dynamics is measured for spherical and cylindrical projectiles of many different densities dropped onto a variety non-cohesive granular media. The results are analyzed in terms of the material-dependent scaling of the inertial and frictional drag contributions to the total stopping force. The inertial drag force scales similar to that in fluids, except that it depends on the internal friction coefficient. The frictional drag force scales as the square-root of the density of granular medium and projectile, and hence cannot be explained by the combination of granular hydrostatic pressure and Coulomb friction law. The combined results provide an explanation for the previously observed penetration depth scaling.

  18. Direct measurements of drag forces in C. elegans crawling locomotion.

    PubMed

    Rabets, Yegor; Backholm, Matilda; Dalnoki-Veress, Kari; Ryu, William S

    2014-10-21

    With a simple and versatile microcantilever-based force measurement technique, we have probed the drag forces involved in Caenorhabditis elegans locomotion. As a worm crawls on an agar surface, we found that substrate viscoelasticity introduces nonlinearities in the force-velocity relationships, yielding nonconstant drag coefficients that are not captured by original resistive force theory. A major contributing factor to these nonlinearities is the formation of a shallow groove on the agar surface. We measured both the adhesion forces that cause the worm's body to settle into the agar and the resulting dynamics of groove formation. Furthermore, we quantified the locomotive forces produced by C. elegans undulatory motions on a wet viscoelastic agar surface. We show that an extension of resistive force theory is able to use the dynamics of a nematode's body shape along with the measured drag coefficients to predict the forces generated by a crawling nematode.

  19. Drag force and jet propulsion investigation of a swimming squid

    NASA Astrophysics Data System (ADS)

    Tabatabaei, Mahdi; Bahadır Olcay, Ali; Gokçen, Gökhan; Heperkan, Hasan A.

    2015-05-01

    In this study, CAD model of a squid was obtained by taking computer tomography images of a real squid. The model later placed into a computational domain to calculate drag force and performance of jet propulsion. The drag study was performed on the CAD model so that drag force subjected to real squid was revealed at squid's different swimming speeds and comparison has been made with other underwater creatures (e.g., a dolphin, sea lion and penguin). The drag coefficient (referenced to total wetted surface area) of squid is 0.0042 at Reynolds number 1.6x106 that is a %4.5 difference from Gentoo penguin. Besides, jet flow of squid was simulated to observe the flow region generated in the 2D domain utilizing dynamic mesh method to mimic the movement of squid's mantle cavity.

  20. Characterization of aerodynamic drag force on single particles: Final report

    SciTech Connect

    Kale, S.R.

    1987-10-01

    An electrodynamic balance was used to measure the drag coefficient and also to record the size and shape of spheres, and coal and oil shale particles (100 ..mu..m to 200 ..mu..m in size). The electrodynamic balance consisted of a central, and two end electrodes. The resulting electric field stably suspended a charged particle. A suspended particle, back illuminated by a light emitting diode, was viewed by a video camera. The image was analyzed for particle position control and was calibrated to give the diameter of spheres, or the area equivalent diameter of nonspherical particles. The drag coefficient was calculated from the air velocity and the dc voltage required to keep the particle at the balance center. The particle Reynolds number varied from 0.2 to 13. Three particles each of coal and oil shale were captured and photographed by a scanning electron microscope and the motion of all the particles was recorded on video tape. Drag coefficient vs Reynolds number data for spheres agreed well with correlations. Data for thirteen particles each of coal and oil shale indicated a power law relationship between drag coefficient and Reynolds number. All these particles exhibited higher drag than spheres and were also observed to rotate. The rotation, however, did not affect the drag coefficient. The choice of characteristic dimension affects the drag characteristics of oil shale more strongly than for coal, owing to the flake-like shape of oil shale. 38 figs., 5 tabs.

  1. Effects of turbulence on the drag force on a golf ball

    NASA Astrophysics Data System (ADS)

    Cross, Rod

    2016-09-01

    Measurements are presented of the drag force on a golf ball dropped vertically into a tank of water. As observed previously in air, the drag coefficient drops sharply when the flow becomes turbulent. The experiment would be suitable for undergraduate students since it can be undertaken at low ball speeds and since the effects of turbulence are easily observed on video film. A modified golf ball was used to show how a ball with a smooth and a rough side, such as a cricket ball, is subject to a side force when the ball surface itself is asymmetrical in the transverse direction.

  2. Ion drag force in plasmas at high electronegativity.

    PubMed

    Denysenko, I; Yu, M Y; Stenflo, L; Xu, S

    2005-07-01

    The electric as well as the positive- and negative-ion drag forces on an isolated dust grain in an electronegative plasma are studied for large negative-ion densities, when the negative ions are not Boltzmann distributed. The investigation is carried out for submicrometer dust particles, so that the theory of Coulomb scattering is applicable for describing ion-dust interaction. Among the forces acting on the dust grain, the negative-ion drag force is found to be important. The effects of the negative-ion density, neutral-gas pressure, and dust-grain size on the forces are also considered. It is shown that by increasing the density of the negative ions one can effectively manipulate the dust grains. Our results imply that both dust voids and balls can be formed.

  3. Mechanosensing using drag force for imaging soft biological membranes.

    PubMed

    Zarnitsyn, Vladimir G; Fedorov, Andrei G

    2007-05-22

    We investigate physical processes taking place during nanoscale mechanosensing of soft biological membranes in liquid environments. Examples include tapping mode imaging by atomic force microscope (AFM) and microscopy based on the Brownian motion of a nanoparticle in an optical-tweezers-controlled trap. The softness and fluidity of the cellular membrane make it difficult to accurately detect (i.e., image) the shape of the cell using traditional mechanosensing methods. The aim of the reported work is to theoretically evaluate whether the drag force acting on the nanoscale mechanical probe due to a combined effect of intra- and extracellular environments can be exploited to develop a new imaging mode suitable for soft cellular interfaces. We approach this problem by rigorous modeling of the fluid mechanics of a complex viscoelastic biosystem in which the probe sensing process is intimately coupled to the membrane biomechanics. The effects of the probe dimensions and elastic properties of the membrane as well as intra- and extracellular viscosities are investigated in detail to establish the structure and evolution of the fluid field as well as the dynamics of membrane deformation. The results of numerical simulations, supported by predictions of the scaling analysis of forces acting on the probe, suggest that viscous drag is the dominant force dictating the probe dynamics as it approaches a biological interface. The increase in the drag force is shown to be measurable, to scale linearly with an increase in the viscosity ratio of the fluids on either side of the membrane, and to be inversely proportional to the probe-to-membrane distance. This leads to the postulation of a new strategy for lipid membrane imaging by AFM or other mechanosensing methods using a variation in the maximum drag force as an indicator of the membrane position.

  4. Non-uniform drag force on the Fermi accelerator model

    NASA Astrophysics Data System (ADS)

    Tavares, Danila F.; Leonel, Edson D.; Costa Filho, R. N.

    2012-11-01

    Some dynamical properties of a particle suffering the action of a generic drag force are obtained for a dissipative Fermi Acceleration model. The dissipation is introduced via a viscous drag force, like a gas, and is assumed to be proportional to a power of the velocity: F∝-vγ. The dynamics is described by a two-dimensional nonlinear area-contracting mapping obtained via the solution of Newton’s second law of motion. We prove analytically that the decay of high energy is given by a continued fraction which recovers the following expressions: (i) linear for γ=1; (ii) exponential for γ=2; and (iii) second-degree polynomial type for γ=1.5. Our results are discussed for both the complete version and the simplified version. The procedure used in the present paper can be extended to many different kinds of system, including a class of billiards problems.

  5. Dynamics of drag force for projectile impact in granular media

    NASA Astrophysics Data System (ADS)

    Behringer, Lauren; Stevens Bester, Cacey; Behringer, Robert

    2016-11-01

    We study the way in which momentum is dissipated as a free-falling projectile impacts a dense granular target. An empirical force law has been widely accepted to describe this process, defining the stopping force as the sum of depth-dependent static force and velocity-dependent inertial drag. However, a complete understanding of the stopping force, incorporating grain-scale interactions during impact, remains unresolved. Using direct force measurements by way of a photoelastic imaging technique, we explore the complex fluctuating behavior of the forces acting on the projectile decelerating through a granular medium. Our results are used to study the static drag as the projectile comes to rest, as well as its connection to the effect of the container boundary of the granular target. We additionally vary the shape of the impeding object to infer intruder-grain interactions from force measurements. Supported by Duke University Provost's Postdoctoral Program, NASA Grant NNX15AD38G, NSF-DMR-1206351.

  6. Drag force in wind tunnels: A new method

    NASA Astrophysics Data System (ADS)

    Souza, P. V. S.; Girardi, D.; de Oliveira, P. M. C.

    2017-02-01

    A rigid object of general shape is fixed inside a wind tunnel. The drag force exerted on it by the wind is determined by a new method based on simple basic Physics concepts, provided one has a solver, any solver, for the corresponding dynamic Navier-Stokes equation which determines the wind velocity field around the object. The method is completely general, but here we apply it to the traditional problem of a long cylinder perpendicular to the wind.

  7. Force Fluctuations in a 2D Granular Drag Experiment

    NASA Astrophysics Data System (ADS)

    Geng, Junfei; Behringer, R. P.

    2002-11-01

    We study fluctuations in the drag force experienced by an object slowly moving through a 2D granular material consisting of bidisperse disks. Slow drag experiments provide a useful way to understand the nature of stress propagation, fluctuations, and slow dynamics in granular materials. Unlike in a liquid, the drag force in a granular material is largely due to the resistance of inhomogeneous and anisotropic ``force chains'', and thus exhibits strong fluctuations. Experiments were carried out in an apparatus similar in spirit to the one by Albert et al.(R. Albert, M.A. Pfeifer, A.L. Barabasi and P. Schiffer, Phys. Rev. Lett. 82), 205 (1999). and we varied the rotation rate (ω=6.3× 10-6 ˜ 8.7× 10-4Hz), the object size (0.744, 0.876, 1.250,1.610,1.930 cm), and the packing fraction of the system. We observed a weak dependence of the mean force on the medium velocity, a rate-invariant power spectrum decaying as ω-2 for large ω (a remarkable resemblance to results by Miller et al.(B. Miller, C. O'Hern and R.P. Behringer, Phys. Rev. Lett. 77), 3110 (1996).), an exponential distribution of avalanche sizes, and a well defined ``Stress Chain Force Constant''. We also show that a simple model adapted after Kahng. et al.(B. Kahng, I. Albert, P. Schiffer and A.L. Barabasi, Phys. Rev. E. 64), 051303 (2001). reproduces many of experimental observations.

  8. Bioinspired air-retaining nanofur for drag reduction.

    PubMed

    Kavalenka, Maryna N; Vüllers, Felix; Lischker, Simone; Zeiger, Claudia; Hopf, Andreas; Röhrig, Michael; Rapp, Bastian E; Worgull, Matthias; Hölscher, Hendrik

    2015-05-27

    Bioinspired nanofur, covered by a dense layer of randomly distributed high aspect ratio nano- and microhairs, possesses superhydrophobic and air-retaining properties. Nanofur is fabricated using a highly scalable hot pulling method in which softened polymer is elongated with a heated sandblasted plate. Here we investigate the stability of the underwater air layer retained by the irregular nanofur topography by applying hydraulic pressure to the nanofur kept underwater, and evaluate the gradual changes in the air-covered area. Furthermore, the drag reduction resulting from the nanofur air retention is characterized by measuring the pressure drop across channels with and without nanofur.

  9. On negative ion-drag force for dust in collisional plasmas

    SciTech Connect

    Patacchini, Leonardo; Hutchinson, Ian H.

    2008-09-07

    The ion-drag force on a dust particle in collisional plasmas is self-consistently calculated using the Particle In Cell code SCEPTIC in the entire range of charge-exchange collisionlality. It is shown that the ion-drag only reverses in the strongly collisional regime, where other forces are of much stronger magnitude than the ion-drag itself.

  10. Determining the Air Drag on a Car.

    ERIC Educational Resources Information Center

    Farr, John E.

    1983-01-01

    Students' cars and wristwatches are used as "apparatus" to introduce and demonstrate Newton's second law of motion. Forces acting on cars are discussed and typical student data (for different makes of cars) are provided. Data could also be used in discussions of work, horsepower, efficiency, and energy cost. (JN)

  11. Drag and propulsive forces in electric sails with negative polarity

    NASA Astrophysics Data System (ADS)

    Sanchez-Torres, Antonio

    2016-02-01

    An electric solar sail (E-sail) is a recent propellantless propulsion concept for a direct exploration of the Solar System. An E-sail consists of a set of bare, conductive tethers at high positive/negative bias, prone to extract solar wind momentum by Coulomb deflection of protons. Additionally, a negatively biased E-sail has been proposed as a concept for de-orbiting space debris with drag forces produced in Low Earth Orbit (LEO). The present work focuses on the negative-bias case with a sheath that must be correctly modeled for a flowing plasma ambient. Ion scattering within the sheath and the resulting force are determined for several plasma conditions. Since the plasma flow does reduce the effective range for the ion scattering within the sheath, the resulting force is then reduced. Tethers at very high negative bias should be required for extremely high plasma flow.

  12. Dynamic behavior of a beam drag-force anemometer

    NASA Technical Reports Server (NTRS)

    Fralick, G. C.

    1980-01-01

    A cantilevered beam with strain gages attached to the fixed ends and the minimax technique were used in an experiment conducted to determine the dynamic behavior of a drag-force anemometer in high frequency, unsteady flow. In steady flow the output of the anemometer is proportional to stream velocity head and flow angle. Fluid mechanics suggests that, in unsteady flow, the output would also be proportional to the rate of change of fluid velocity. It was determined that effects due to the rate of change of fluid velocity are negligible for the probe geometry and frequencies involved.

  13. Air Force Research Laboratory

    DTIC Science & Technology

    2009-06-08

    Air Force Research Laboratory 8 June 2009 Mr. Leo Marple Ai F R h L b t r orce esearc a ora ory Leo.Marple@wpafb.af.mil DISTRIBUTION STATEMENT A...TITLE AND SUBTITLE Air Force Research Laboratory 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER...5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Air Force Research Laboratory ,Wright

  14. Variability in Measurement of Swimming Forces: A Meta-Analysis of Passive and Active Drag

    ERIC Educational Resources Information Center

    Havriluk, Rod

    2007-01-01

    An analysis was conducted to identify sources of true and error variance in measuring swimming drag force to draw valid conclusions about performance factor effects. Passive drag studies were grouped according to methodological differences: tow line in pool, tow line in flume, and carriage in tow tank. Active drag studies were grouped according to…

  15. The drag force on a subsonic projectile in a fluid complex plasma

    SciTech Connect

    Ivlev, A. V.; Zhukhovitskii, D. I.

    2012-09-15

    The incompressible Navier-Stokes equation is employed to describe a subsonic particle flow induced in complex plasmas by a moving projectile. Drag forces acting on the projectile in different flow regimes are calculated. It is shown that, along with the regular neutral gas drag, there is an additional force exerted on the projectile due to dissipation in the surrounding particle fluid. This additional force provides significant contribution to the total drag.

  16. Air Force Junior ROTC

    ERIC Educational Resources Information Center

    McDonnell, James A., Jr.

    1974-01-01

    Describes the Junior Air Force Reserve Officers Training Corps (AFROTC) program presently being operated in 275 units across the country. It is basically a three year course in aerospace studies and leadership education. (BR)

  17. Numerical study of the hydrodynamic drag force in atomic force microscopy measurements undertaken in fluids.

    PubMed

    Méndez-Méndez, J V; Alonso-Rasgado, M T; Faria, E Correia; Flores-Johnson, E A; Snook, R D

    2014-11-01

    When atomic force microscopy (AFM) is employed for in vivo study of immersed biological samples, the fluid medium presents additional complexities, not least of which is the hydrodynamic drag force due to viscous friction of the cantilever with the liquid. This force should be considered when interpreting experimental results and any calculated material properties. In this paper, a numerical model is presented to study the influence of the drag force on experimental data obtained from AFM measurements using computational fluid dynamics (CFD) simulation. The model provides quantification of the drag force in AFM measurements of soft specimens in fluids. The numerical predictions were compared with experimental data obtained using AFM with a V-shaped cantilever fitted with a pyramidal tip. Tip velocities ranging from 1.05 to 105 μm/s were employed in water, polyethylene glycol and glycerol with the platform approaching from a distance of 6000 nm. The model was also compared with an existing analytical model. Good agreement was observed between numerical results, experiments and analytical predictions. Accurate predictions were obtained without the need for extrapolation of experimental data. In addition, the model can be employed over the range of tip geometries and velocities typically utilized in AFM measurements.

  18. New insights into the complex interplay between drag forces and its thermospheric consequences

    NASA Astrophysics Data System (ADS)

    Hsu, Vicki W.; Thayer, Jeffrey P.; Wang, Wenbin; Burns, Alan

    2016-10-01

    Drag forces, ion and viscous, are evaluated as modifiers of global wind and temperature structure in the upper thermosphere, shedding new light on their relative roles in neutral dynamics and energetics. Exploiting the coupling of an ionosphere-thermosphere model, it is discovered that ion and viscous drag forces lead to sustained divergent winds, adjustments in mass, modification of pressure gradients, and a redistribution of the radiatively forced thermal energy. The interplay between the relative magnitudes of the ion and viscous drag forces and its effect on the ionosphere-thermosphere system has not yet been addressed and results in diverse behavior in the neutral wind and temperature structures of the upper atmosphere, dependent upon the type of drag acting on the gas. It is found that viscous drag is more efficient in cooling the dayside thermosphere and heating the nightside than the ion drag force in solar maximum and under quiet geomagnetic activity, resulting in a 150 K day-night temperature difference. The ion drag force inhibits this effective day-to-night energy circulation, culminating in a dynamically induced difference of about 400 K in the day-night temperature difference. It is demonstrated that the resultant wind and thermal structure greatly depends on the type of drag force environment, and a mechanism is introduced whereby ion and viscous drag forces can alter the energy budget of the upper thermosphere system. For example, in solar minimum, viscous drag is significant relative to other forces and more effectively cools the dayside and warms the nightside, thereby reducing the day-night temperature gradient.

  19. Measurement of the ion drag force on free falling microspheres in a plasma

    NASA Astrophysics Data System (ADS)

    Hirt, Markus; Block, Dietmar; Piel, Alexander

    2004-12-01

    Experiments on the quantitative determination of the ion drag force on free-falling dust particles in a collisionless regime are presented. The ion drag forces are measured for ion energies up to 40 eV and the obtained results are compared in detail with theories. Good agreement is found with the Barnes model [Barnes et al., Phys. Rev. Lett. 68, 313 (1992)] of the ion drag force for high ion energies (E>3 eV). At lower ion energies the model of Khrapak [Khrapak et al., Phys. Rev. Lett. 90, 225002 (2003)] is found to give a better description of the capture of slowly streaming ions by highly charged particles.

  20. Computation of Ion Drag Force and Charge on a Static Spherical Dust Grain in RF Plasma

    SciTech Connect

    Ikkurthi, V. R.; Melzer, A.; Matyash, K.; Schneider, R.

    2008-09-07

    The ion drag force and charge on a spherical dust grain located in RF discharge plasma is computed using a 3-dimensional Particle-Particle Particle-Mesh (P3M) code. Our plasma model includes finite-size effects for dust grains and allows to self-consistently resolve the dust grain charging due to absorption of plasma electrons and ions. Ion drag and dust charge have been computed for various sizes of dust particles placed at various locations in the discharge. The results for ion drag have been compared with previous collisionless models and affect of collisions on drag has been discussed in detail.

  1. Direct Measurements of Drag Forces in C. elegans Crawling Locomotion

    PubMed Central

    Rabets, Yegor; Backholm, Matilda; Dalnoki-Veress, Kari; Ryu, William S.

    2014-01-01

    With a simple and versatile microcantilever-based force measurement technique, we have probed the drag forces involved in Caenorhabditis elegans locomotion. As a worm crawls on an agar surface, we found that substrate viscoelasticity introduces nonlinearities in the force-velocity relationships, yielding nonconstant drag coefficients that are not captured by original resistive force theory. A major contributing factor to these nonlinearities is the formation of a shallow groove on the agar surface. We measured both the adhesion forces that cause the worm’s body to settle into the agar and the resulting dynamics of groove formation. Furthermore, we quantified the locomotive forces produced by C. elegans undulatory motions on a wet viscoelastic agar surface. We show that an extension of resistive force theory is able to use the dynamics of a nematode’s body shape along with the measured drag coefficients to predict the forces generated by a crawling nematode. PMID:25418179

  2. Congress and the Air Force.

    DTIC Science & Technology

    1996-04-01

    know where to go to find out that information. The "Congress and the Air Force" Internet web page serves as a " one - stop shop" where Air Force personnel...Congress. The need for a " one - stop " guide is clear. The literature on this topic is not readily accessible by the Air Force member out in the field who

  3. Semianalytic Theory of Motion for LEO Satellites Under Air Drag

    NASA Astrophysics Data System (ADS)

    Bezdek, A.

    The presented semianalytic theory focuses on the longterm evolution of the LEO satellites motion, with the TD/TD88 model of the total density as a key ingredient. Besides, the theory takes into account the main geopotential perturbations, for satellites with low eccentricity and/or inclination, nonsingular elements are used. An interesting feature of the theory is its computational speed (e.g. the 10-year propagation takes 5.5 s on a PC with Intel Celeron 1.7 GHz), while considering major physical conditions that strongly influence the thermospheric density (solar flux, geomagnetic activity, diurnal and seasonal variations, geographic latitude). The online calculation as well as the code are available on the Internet. The theory has been tested against the real world data of several spherical satellites. For the lifetime prediction accuracy estimate of the theory, we used a confidential interval based on the uncertainty in the drag coefficient CD, while taking the measured values of the solar flux and geomagnetic index. The modelled long-term behaviour of the orbital elements is in reasonably good agreement with the data, the computed lifetimes fall within the CD-induced confidential intervals, typical error in the mean lifetime prediction being a few percent. The tests showed that - provided one appropriately models the solar and geomagnetic activity - the theory may be used in the areas where one needs a quick orbital propagator for LEO objects influenced by air drag (mission planning, lifetime prediction, space debris dynamics). As an example, we will show the mission planning and the medium-term prediction of the motion for the MIMOSA satellite.

  4. The influence of the breathing action on net drag force production in front crawl swimming.

    PubMed

    Formosa, D; Sayers, M G L; Burkett, B

    2014-12-01

    20 elite swimmers completed a total of 6 randomized net drag force trials in 2 conditions (i) 3 breathing and (ii) 3 non-breathing. Net drag force was measured using an assisted motorized dynamometer device mounted upon a Kistler force-platform. The male participants demonstrated no statistical differences in stroke rates between breathing and non-breathing trials. Female participants, however, demonstrated a statistical difference stroke rate. The male participants demonstrated that the breathing action caused a greater (26%) net drag force compared to the females (16%). To further understand the influence of breathing on swimming technique, each stroke was analyzed and comparisons were made between the breathing and non-breathing conditions. The male participants demonstrated a similar minimum net drag force when comparing the breathing and non-breathing conditions. Analysis showed that minimum net drag force and maximum net drag force for the males changed when integrating the breathing action, while female participants demonstrated similar swimming technique, regardless of condition or stroke.

  5. Drag force and surface roughness measurements on freshwater biofouled surfaces.

    PubMed

    Andrewartha, J; Perkins, K; Sargison, J; Osborn, J; Walker, G; Henderson, A; Hallegraeff, G

    2010-05-01

    The detrimental effect of biofilms on skin friction for near wall flows is well known. The diatom genera Gomphonema and Tabellaria dominated the biofilm mat in the freshwater open channels of the Tarraleah Hydropower Scheme in Tasmania, Australia. A multi-faceted approach was adopted to investigate the drag penalty for biofouled 1.0 m x 0.6 m test plates which incorporated species identification, drag measurement in a recirculating water tunnel and surface characterisation using close-range photogrammetry. Increases in total drag coefficient of up to 99% were measured over clean surface values for biofouled test plates incubated under flow conditions in a hydropower canal. The effective roughness of the biofouled surfaces was found to be larger than the physical roughness; the additional energy dissipation was caused in part by the vibration of the biofilms in three-dimensions under flow conditions. The data indicate that there was a roughly linear relationship between the maximum peak-to-valley height of a biofilm and the total drag coefficient.

  6. Air Force Research Laboratory, Edwards Air Force Base, CA

    DTIC Science & Technology

    2011-06-27

    Air Force Research Laboratory (AFMC) AFRL /RZS 1 Ara Road Edwards AFB CA 93524-7013 AFRL -RZ-ED-VG-2011-269 9...SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR’S ACRONYM(S) Air Force Research Laboratory (AFMC) AFRL /RZS 11. SPONSOR...Form 298 (Rev. 8-98) Prescribed by ANSI Std. 239.18 Air Force Research Laboratory Ed d Ai F B CA Col Mike Platt war s r orce

  7. STS-67 landing at Edwards Air Force Base

    NASA Technical Reports Server (NTRS)

    1995-01-01

    The drag chute is fully deployed in this view of the Space Shuttle Endeavour as it completes a mission of almost 17 days duration in space on runway 22 at Edwards Air Force Base in southern California. Landing occurred at 1:46 p.m. (EST), March 18, 1995.

  8. STS-66 landing at Edwards Air Force Base

    NASA Technical Reports Server (NTRS)

    1994-01-01

    The drag chute is fully deployed as the Space Shuttle Atlantis heads toward a stop at Edwards Air Force Base in southern California, ending a successful 10 day, 22 hour and 34 minute space mission. Landing occured at 7:34 a.m. (PST), November 14, 1994.

  9. Skin-friction drag analysis from the forced convection modeling in simplified underwater swimming.

    PubMed

    Polidori, G; Taïar, R; Fohanno, S; Mai, T H; Lodini, A

    2006-01-01

    This study deals with skin-friction drag analysis in underwater swimming. Although lower than profile drag, skin-friction drag remains significant and is the second and only other contribution to total drag in the case of underwater swimming. The question arises whether varying the thermal gradient between the underwater swimmer and the pool water may modify the surface shear stress distribution and the resulting skin-friction drag acting on a swimmer's body. As far as the authors are aware, such a question has not previously been addressed. Therefore, the purpose of this study was to quantify the effect of this thermal gradient by using the integral formalism applied to the forced convection theory. From a simplified model in a range of pool temperatures (20-30 degrees C) it was demonstrated that, whatever the swimming speeds, a 5.3% reduction in the skin-friction drag would occur with increasing average boundary-layer temperature provided that the flow remained laminar. However, as the majority of the flow is actually turbulent, a turbulent flow analysis leads to the major conclusion that friction drag is a function of underwater speed, leading to a possible 1.5% reduction for fast swimming speeds above 1m/s. Furthermore, simple correlations between the surface shear stress and resulting skin-friction drag are derived in terms of the boundary-layer temperature, which may be readily used in underwater swimming situations.

  10. Future Air Force systems.

    PubMed

    Tremaine, S A

    1986-10-01

    Planning for the future is under way in earnest at the Aeronautical Systems Division (ASD) at Wright-Patterson Air Force Base. It has been statistically established that it takes from 14-16 years from the generation of a new system idea to enter into engineering development. With this unpleasing, but realistic, schedule in mind, ASD has, during the last 3 years, been initiating long-term planning projects that are pre-starts for new system ideas. They are generated from throughout the Air Force and are locally managed and funded. Through this process, which spans from 12-14 months, specific and revolutionary new ideas for the systems of the future are generated. This article addresses more than a dozen specific new ideas in work at ASD today. These ideas range from a need to replace the C-130 type aircraft after the year 2000 to planning a follow-on to the B-18 well into the 21st century. Among other specific projects are investigation into an immortal fighter intended to be free of reliability and maintenance demands for an especially long period of operation, a new training system and advanced trainer to replace the T-38, a transatmospheric vehicle that could operate in the 100,000-500,000 foot flight region (30,480-152,400 m), and a new means of defending against hostile cruise missile launchers and cruise missiles. Other ideas are also addressed. The article concludes with emphasis on systems that can operate hypersonically in and out of the known atmosphere and greater use of airbreathing propulsion systems operating between Mach 3 and Mach 6.

  11. Techniques for determining propulsion system forces for accurate high speed vehicle drag measurements in flight

    NASA Technical Reports Server (NTRS)

    Arnaiz, H. H.

    1975-01-01

    As part of a NASA program to evaluate current methods of predicting the performance of large, supersonic airplanes, the drag of the XB-70 airplane was measured accurately in flight at Mach numbers from 0.75 to 2.5. This paper describes the techniques used to determine engine net thrust and the drag forces charged to the propulsion system that were required for the in-flight drag measurements. The accuracy of the measurements and the application of the measurement techniques to aircraft with different propulsion systems are discussed. Examples of results obtained for the XB-70 airplane are presented.

  12. Drag forces of natural trees of different size: experiments in a towing tank

    NASA Astrophysics Data System (ADS)

    Jalonen, Johanna; Järvelä, Juha

    2013-04-01

    Reliable estimation of hydraulic resistance is of great importance in practical applications such as river and wetland restoration as well as flood prediction and management. Parameters describing riparian vegetation need to be physically sound and readily measurable. For these purposes, several researchers have studied the hydraulic resistance in flumes with living and artificial plants both in arrays and with isolated plants. However, due to the restrictions of flume size the experiments are often conducted with parts of trees, twigs or branches. Consequently, it is not clear how the size (parts of trees or small trees vs. full scale trees) affects the hydraulic resistance. We conducted direct drag force measurements for 23 tree individuals of different heights (0.9 m - 3.5 m) in a towing tank. The investigated species were Common Alder (Alnus glutinosa), Goat Willow (Salix caprea), Silver Birch (Betula pendula) and White Birch (Betula pubescens). The forces were measured at velocity ranges of 0.1-2.5 m/s and 0.1-2.0 m/s both in leafy and leafless conditions, respectively. The measurement system consisted of three load cells measuring the main flow direction. Two different load cell setups were used depending on the size of the specimen to allow for accurate force measurement. For the smaller trees the load cells were replaced with more sensitive sensors, and the resulting ranges of the load cells were from 1 to 1000 N and from 0.1 to 100 N. Frontal and side projected areas and bending of the specimens were recorded during the measurements using submerged video cameras. For all specimens, wet and dry biomass, projected area in still air, and one-sided leaf area were determined. In order to construct a 3D-model of the trees, the specimens were laser scanned from three directions with a terrestrial laser scanner (TLS). The resulting point cloud had a millimeter resolution, and provided detailed information about the plant characteristics, such as leaf area

  13. The Gravitational Drag Force felt by a Plummer-type Perturber immersed in a gas

    NASA Astrophysics Data System (ADS)

    Bernal, C. G.; Salcedo, J. S.

    2014-10-01

    In this work we use axisymmetrical numerical simulations with the Flash Code to calculate the gravitational drag force felt by a gravitational Plummer sphere when moving in a homogeneous medium. We revisit the linear scenario studied by Ostriker (1999) as well as the nonlinear scenario studied by Kim & Kim (2009) focusing in the hydrodynamics and in the integrated force.

  14. Relationship between the ion drag and electric forces in dense dust clouds

    SciTech Connect

    Yaroshenko, V. V.; Khrapak, S. A.; Morfill, G. E.

    2013-04-15

    It is shown that the relation between the ion drag and electric forces is strongly dependent on the dust number density in complex plasmas. The effect of the particle size and discharge parameters on the force balance is investigated. Examples are given for realistic complex plasma parameters and comparison with microgravity experiments is presented.

  15. Ion drag force on an absorbing grain in highly collisional plasma in the presence of plasma production and loss processes

    SciTech Connect

    Chaudhuri, Manis; Khrapak, Sergei A.; Morfill, Gregor E.

    2008-09-07

    The ion drag force acting on a small absorbing spherical grain has been calculated analytically in highly collisional plasma with slowly drifting ions taking into account plasma production and loss mechanisms in the vicinity of the grain. It is shown that both the magnitude and direction of the ion drag force are strongly influenced by the plasma production and loss mechanisms. The parameter regimes for the 'positive' and 'negative' ion drag forces acting on an absorbing grain have been identified.

  16. Lift vs. drag based mechanisms for vertical force production in the smallest flying insects.

    PubMed

    Jones, S K; Laurenza, R; Hedrick, T L; Griffith, B E; Miller, L A

    2015-11-07

    We used computational fluid dynamics to determine whether lift- or drag-based mechanisms generate the most vertical force in the flight of the smallest insects. These insects fly at Re on the order of 4-60 where viscous effects are significant. Detailed quantitative data on the wing kinematics of the smallest insects is not available, and as a result both drag- and lift-based strategies have been suggested as the mechanisms by which these insects stay aloft. We used the immersed boundary method to solve the fully-coupled fluid-structure interaction problem of a flexible wing immersed in a two-dimensional viscous fluid to compare three idealized hovering kinematics: a drag-based stroke in the vertical plane, a lift-based stroke in the horizontal plane, and a hybrid stroke on a tilted plane. Our results suggest that at higher Re, a lift-based strategy produces more vertical force than a drag-based strategy. At the Re pertinent to small insect hovering, however, there is little difference in performance between the two strategies. A drag-based mechanism of flight could produce more vertical force than a lift-based mechanism for insects at Re<5; however, we are unaware of active fliers at this scale.

  17. Noetherian symmetries of noncentral forces with drag term

    NASA Astrophysics Data System (ADS)

    Ghose-Choudhury, A.; Guha, Partha; Paliathanasis, Andronikos; Leach, P. G. L.

    We consider the Noetherian symmetries of second-order ODEs subjected to forces with nonzero curl. Both position and velocity dependent forces are considered. In the former case, the first integrals are shown to follow from the symmetries of the celebrated Emden-Fowler equation.

  18. Response spectrum method for extreme wave loading with higher order components of drag force

    NASA Astrophysics Data System (ADS)

    Reza, Tabeshpour Mohammad; Mani, Fatemi Dezfouli; Ali, Dastan Diznab Mohammad; Saied, Mohajernasab; Saied, Seif Mohammad

    2017-03-01

    Response spectra of fixed offshore structures impacted by extreme waves are investigated based on the higher order components of the nonlinear drag force. In this way, steel jacket platforms are simplified as a mass attached to a light cantilever cylinder and their corresponding deformation response spectra are estimated by utilizing a generalized single degree of freedom system. Based on the wave data recorded in the Persian Gulf region, extreme wave loading conditions corresponding to different return periods are exerted on the offshore structures. Accordingly, the effect of the higher order components of the drag force is considered and compared to the linearized state for different sea surface levels. When the fundamental period of the offshore structure is about one third of the main period of wave loading, the results indicate the linearized drag term is not capable of achieving a reliable deformation response spectrum.

  19. Response spectrum method for extreme wave loading with higher order components of drag force

    NASA Astrophysics Data System (ADS)

    Reza, Tabeshpour Mohammad; Mani, Fatemi Dezfouli; Mohammad Ali, Dastan Diznab; Saied, Mohajernasab; Saied, Seif Mohammad

    2017-01-01

    Response spectra of fixed offshore structures impacted by extreme waves are investigated based on the higher order components of the nonlinear drag force. In this way, steel jacket platforms are simplified as a mass attached to a light cantilever cylinder and their corresponding deformation response spectra are estimated by utilizing a generalized single degree of freedom system. Based on the wave data recorded in the Persian Gulf region, extreme wave loading conditions corresponding to different return periods are exerted on the offshore structures. Accordingly, the effect of the higher order components of the drag force is considered and compared to the linearized state for different sea surface levels. When the fundamental period of the offshore structure is about one third of the main period of wave loading, the results indicate the linearized drag term is not capable of achieving a reliable deformation response spectrum.

  20. Observation and numerical experiments for drag coefficient under typhoon wind forcing

    NASA Astrophysics Data System (ADS)

    Cao, Huiqiu; Zhou, Liangming; Li, Shuiqing; Wang, Zhifeng

    2017-02-01

    This paper presents a study on drag coefficients under typhoon wind forcing based on observations and numerical experiments. The friction velocity and wind speed are measured at a marine observation platform in the South China Sea. Three typhoons: SOULIK (2013), TRAMI (2013) and FITOW (2013) are observed at a buoy station in the northeast sea area of Pingtan Island. A new parameterization is formulated for the wind drag coefficient as a function of wind speed. It is found that the drag coefficient ( C d ) increases linearly with the slope of 0.083×10-3 for wind speed less than 24 m s-1. To investigate the drag coefficient under higher wind conditions, three numerical experiments are implemented for these three typhoons using SWAN wave model. The wind input data are objective reanalysis datasets, which are assimilated with many sources and provided every six hours with the resolution of 0.125°×0.125°. The numerical simulation results show a good agreement with wave observation data under typhoon wind forcing. The results indicate that the drag coefficient levels off with the linear slope of 0.012×10-3 for higher wind speeds (less than 34 m s-1) and the new parameterization improvese the simulation accuracy compared with the Wu (1982) default used in SWAN.

  1. Projectile Motion with a Drag Force: Were the Medievals Right After All?

    ERIC Educational Resources Information Center

    La Rocca, Paola; Riggi, Francesco

    2009-01-01

    An educational and historical study of the projectile motion with drag forces dependent on speed shows, by simple results, that trajectories quite similar to those depicted before the Galilean era may be obtained with a realistic choice of quantities involved. Numerical simulations of the trajectory in space and velocity coordinates help us to…

  2. The Community College of the Air Force

    ERIC Educational Resources Information Center

    Kaapke, Lyle D.; Wojciechowske, William A.

    1977-01-01

    The Community College of the Air Force is unique as a postsecondary occupational education institution because it integrates Air Force technical education and civilian-related education into programs which are totally responsive to the Air Force community. (JG)

  3. Drag force on a moving impurity in a spin-orbit-coupled Bose-Einstein condensate

    NASA Astrophysics Data System (ADS)

    He, Pei-Song; Zhu, Yao-Hui; Liu, Wu-Ming

    2014-05-01

    We investigate the drag force on a moving impurity in a spin-orbit-coupled Bose-Einstein condensate. We prove rigorously that the superfluid critical velocity is zero when the impurity moves in all directions but one, in contrast to the case of liquid helium and superconductor, where it is finite in all directions. We also find that when the impurity moves in all directions except the two special ones, the drag force has nonzero transverse component with a small velocity. When the velocity becomes large and the states of the upper band are also excited, the transverse force becomes very small due to opposite contributions of the two bands. The characteristics of the superfluid critical velocity and the transverse force are results of the order-by-disorder mechanism in spin-orbit-coupled boson systems.

  4. Analytical orbit predictions with air drag using K-S uniformly regular canonical elements

    NASA Astrophysics Data System (ADS)

    Xavier James Raj, M.; Sharma, R. K.

    Accurate orbit prediction of the Earth's satellites is an important requirement for mission planning, satellite geodesy, spacecraft navigation, re-entry and orbital lifetime estimates. For this purpose, it has become necessary to use extremely complex force models to match with the present operational requirements and observational techniques. The problem becomes all the more complicated in the near-Earth environment due to the fact that the satellite is influenced by the non-spherical effects of the Earth's gravitational field as well as the dissipative effects of the Earth's atmosphere. The effects of the atmosphere are difficult to determine since the atmospheric density, and hence the drag, undergoes large modelled fluctuations. Though the accurate ephemeris of a near-Earth satellite can be generated by the numerical integration methods with respect to a complex force model, the analytical solutions, though difficult to obtain for complex force models and limited to relatively simple models, represent a manifold of solutions for a large domain of initial conditions and find indispensable application to mission planning and qualitative analysis. The method of the K-S total-energy element equations (Stiefel & Scheifele, 1971) is a powerful method for numerical solution with respect to any type of perturbing forces, as the equations are less sensitive to round-off and truncation errors in the numerical algorithm. The equations are everywhere regular in contrast with the classical Newtonian equations, which are singular at the collision of the two bodies. The equations are smoothed for eccentric orbits because eccentric anomaly is the independent variable. These equations have been used effectively to generate analytical solution with respect to Earth's zonal harmonic term J2 (Sharma 1997) and air drag perturbations (Sharma 1992). A particular canonical form of the K-S differential equations, known as K-S uniform regular canonical equations, where all the ten

  5. Drag reductions and the air-water interface stability of superhydrophobic surfaces in rectangular channel flow

    NASA Astrophysics Data System (ADS)

    Zhang, Jingxian; Yao, Zhaohui; Hao, Pengfei

    2016-11-01

    Flow in a rectangular channel with superhydrophobic (SH) top and bottom walls was investigated experimentally. Different SH surfaces, including hierarchical structured surfaces and surfaces with different micropost sizes (width and spacing) but the same solid fraction, were fabricated and measured. Pressure loss and flow rate in the channel with SH top and bottom walls were measured, with Reynolds number changing from 700 to 4700, and the corresponding friction factor for the SH surface was calculated. The statuses of the air plastron on different SH surfaces were observed during the experiment. In our experiment, compared with the experiment for the smooth surface, drag reductions were observed for all SH surfaces, with the largest drag reduction of 42.2%. It was found that the hierarchy of the microstructure can increase the drag reduction by decreasing the solid fraction and enhancing the stability of the air-water interface. With a fixed solid fraction, the drag reduction decreases as the post size (width and spacing) increases, due to the increasing curvature and instability effects of the air-water interface. A correlation parameter between the contact angle hysteresis, the air-water interface stability, and the drag reduction of the SH surfaces was found.

  6. Drag reductions and the air-water interface stability of superhydrophobic surfaces in rectangular channel flow.

    PubMed

    Zhang, Jingxian; Yao, Zhaohui; Hao, Pengfei

    2016-11-01

    Flow in a rectangular channel with superhydrophobic (SH) top and bottom walls was investigated experimentally. Different SH surfaces, including hierarchical structured surfaces and surfaces with different micropost sizes (width and spacing) but the same solid fraction, were fabricated and measured. Pressure loss and flow rate in the channel with SH top and bottom walls were measured, with Reynolds number changing from 700 to 4700, and the corresponding friction factor for the SH surface was calculated. The statuses of the air plastron on different SH surfaces were observed during the experiment. In our experiment, compared with the experiment for the smooth surface, drag reductions were observed for all SH surfaces, with the largest drag reduction of 42.2%. It was found that the hierarchy of the microstructure can increase the drag reduction by decreasing the solid fraction and enhancing the stability of the air-water interface. With a fixed solid fraction, the drag reduction decreases as the post size (width and spacing) increases, due to the increasing curvature and instability effects of the air-water interface. A correlation parameter between the contact angle hysteresis, the air-water interface stability, and the drag reduction of the SH surfaces was found.

  7. Tension and drag forces of flexible risers undergoing vortex-induced vibration

    NASA Astrophysics Data System (ADS)

    Song, Lei-jian; Fu, Shi-xiao; Li, Man; Gao, Yun; Ma, Lei-xin

    2017-03-01

    This paper presents the results of an experimental investigation on the variation in the tension and the distribution of drag force coefficients along flexible risers under vortex-induced vibration (VIV) in a uniform flow for Reynolds numbers ( Re) up to 2.2×105. The results show that the mean tension is proportional to the square of the incoming current speed, and the tension coefficient of a flexible riser undergoing VIV can be up to 12. The mean drag force is uniformly and symmetrically distributed along the axes of the risers undergoing VIV. The corresponding drag coefficient can vary between 1.6 and 2.4 but is not a constant value of 1.2, as it is for a fixed cylinder in the absence of VIV. These experimental results are used to develop a new empirical prediction model to estimate the drag force coefficient for flexible risers undergoing VIV for Reynolds number on the order of 105, which accounts for the effects of the incoming current speed, the VIV dominant modal number and the frequency.

  8. THE ROLE OF DRAG IN THE ENERGETICS OF STRONGLY FORCED EXOPLANET ATMOSPHERES

    SciTech Connect

    Rauscher, Emily; Menou, Kristen

    2012-01-20

    In contrast to the Earth, where frictional heating is typically negligible, we show that drag mechanisms could act as an important heat source in the strongly forced atmospheres of some exoplanets, with the potential to alter the circulation. We modify the standard formalism of the atmospheric energy cycle to explicitly track the loss of kinetic energy and the associated frictional (re)heating, for application to exoplanets such as the asymmetrically heated 'hot Jupiters' and gas giants on highly eccentric orbits. We establish that an understanding of the dominant drag mechanisms and their dependence on local atmospheric conditions is critical for accurate modeling, not just in their ability to limit wind speeds, but also because they could possibly change the energetics of the circulation enough to alter the nature of the flow. We discuss possible sources of drag and estimate the strength necessary to significantly influence the atmospheric energetics. As we show, the frictional heating depends on the magnitude of kinetic energy dissipation as well as its spatial variation, so that the more localized a drag mechanism is, the weaker it can be and still affect the circulation. We also use the derived formalism to estimate the rate of numerical loss of kinetic energy in a few previously published hot Jupiter models with and without magnetic drag and find it to be surprisingly large, at 5%-10% of the incident stellar irradiation.

  9. The effect of solar forcing induced atmospheric perturbations on LEO satellites' nominal aerodynamic drag

    NASA Astrophysics Data System (ADS)

    Nwankwo, Victor U. J.; Chakrabarti, Sandip Kumar; Weigel, Robert

    2016-07-01

    Atmospheric drag is the strongest force perturbing the motion of satellites in low Earth orbits LEO, and could cause re-entry of satellites, difficulty in identifying and tracking of the satellites and other space objects, manuvering and prediction of lifetime and re-entry. Solar activities influence the temperature, density and composition of the upper atmosphere. These effects thus strongly depend on the phase of a solar cycle. The frequency of intense flares and storms increase during solar maximum. Heating up of the atmosphere causes its expansion eventually leading to accelerated drag of orbiting satellites, especially those in LEO. In this paper, we present the model of the atmospheric drag effect on the trajectory of hypothetical LEO satellites of different ballistic coefficients. We investigate long-term trend of atmospheric drag on LEO satellites due to solar forcing induced atmospheric perturbations and heating at different phases of the solar cycle, and during interval of strong geomagnetic disturbances or storms. We show the dependence of orbital decay on severity of both the solar cycle and phase, and the extent of geomagnetic perturbations. The result of the model compares well with the observed decay profile of existing LEO satellites and provides a better understanding of the issue of the orbital decay. Our result may also be useful for selection of launch window of satellites for an extended lifetime in the orbit.

  10. Concurrent field measurements of turbulent velocities, plant reconfiguration and drag forces on Ranunculus penicillatus

    NASA Astrophysics Data System (ADS)

    Paul, Maike; Thomas, Robert E.; Keevil, Gareth M.

    2013-04-01

    In lowland rivers, seasonal patterns of in-stream macrophyte growth and decay have significant implications for flood risk. For a given discharge, flood risk is increased when dense macrophyte canopies reduce flow areas, increase blockage ratios and alter reach-scale roughness values. These factors combine and can increase the flow depth. Conversely, submerged vegetation is exposed to drag forces exerted by the flow, which may be sufficient to damage limbs or dislodge plants. The classical drag equation suggests that the force exerted by fluid flows upon submerged vegetation is a function of the fluid properties, the projected area of the vegetation, and the square of the flow velocity. However, very few studies have simultaneously monitored all of these parameters, resulting in significant uncertainty in the estimation of the coefficient that relates these parameters to the drag force and also the related roughness parameters that control the flow depth for a given discharge. To our knowledge, this study presents the first concurrent field measurements of turbulent velocities, plant reconfigurations and drag forces acting on Ranunculus penicillatus ssp. pseudofluitans (Syme) S.D.Webster. Measurements were undertaken in an artificially straightened reach of the chalk-bed River Wylye, near Longbridge Deverill, Wiltshire, UK. The reach is 5.7 m wide and during measurements there was a mean flow depth of 0.28 m and an average discharge of 0.28 m³s-1. The reach is cleared of vegetation up to three times a year for flood defence purposes, but Ranunculus p. grows back within several weeks. Measurements were carried out after re-growth, when plants were fully developed with a mean length of 0.75 m and on average 6 nodes along the stem. The distances between the nodes increased from the base towards the tip and each node produced a capillary leaf, sometimes in conjunction with a branch. Floating leaves and flowers were not present. Plants were attached to a custom

  11. Air Force Research Laboratory Technology Milestones 2008

    DTIC Science & Technology

    2008-01-01

    Air Force Research Laboratory ( AFRL ) is the only science and technology (S&T) organization for the Air Force . Accordingly, AFRL fulfills a mission to...Readership survey is sponsored by the Air Force Research Laboratory ( AFRL ), Wright-Patterson Air Force Base, Ohio. Thank you in advance for your...Base Defense AFRL researchers participated in the Robotic Physical Security Experiment, conducted at

  12. Direct Numerical Simulation of Air Layer Drag Reduction over a Backward-facing Step

    NASA Astrophysics Data System (ADS)

    Kim, Dokyun; Moin, Parviz

    2010-11-01

    Direct Numerical Simulation (DNS) of two-phase flow is performed to investigate the air layer drag reduction (ALDR) phenomenon in turbulent flow over a backward-facing step. In their experimental study, Elbing et al. (JFM, 2008) have observed a stable air layer on an entire flat plate if air is injected beyond the critical air-flow rate. In the present study, air is injected at the step on the wall into turbulent water flow for ALDR. The Reynolds and Weber numbers based on the water properties and step height are 22,800 and 560, respectively. An inlet section length before the step is 3h and the post expansion length is 30h, where h is the step height. The total number of grid points is about 271 million for DNS. The level set method is used to track the phase interface and the structured-mesh finite volume solver is used with an efficient algorithm for two-phase DNS. Two cases with different air-flow rates are performed to investigate the mechanism and stability of air layer. For high air-flow rate, the stable air layer is formed on the plate and more than 90% drag reduction is obtained. In the case of low air-flow rate, the air layer breaks up and ALDR is not achieved. The parameters governing the stability of air layer from the numerical simulations is also consistent with the results of stability analysis.

  13. Air Force Posture Statement 2002

    DTIC Science & Technology

    2002-01-01

    Ahmedabad, India. In April, a C–17 airlifted 10 cheetahs from Africa to America as part of a gift to the United States from the people of Namibia...the-sky” upgrades to include broadband data and direct broadcast service. As funds become available, remaining VIPSAM aircraft will be evaluated for...sustain air and space capabilities. In FY02, operations and maintenance (O&M) sustainment funding precluded fully maintaining Air Force facilities and

  14. Satellite Attitude Control Using Atmospheric Drag

    DTIC Science & Technology

    2007-03-01

    Satellite Attitude Control Using Atmospheric Drag THESIS David B. Guettler, Captain, USAF AFIT/GA/ENY/07-M10 DEPARTMENT OF THE AIR FORCE AIR...U.S. Government. AFIT/GA/ENY/07-M10 Satellite Attitude Control Using Atmospheric Drag THESIS Presented to the Faculty Department of Aeronautics and...APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED. AFIT/GA/ENY/07-M10 Satellite Attitude Control Using Atmospheric Drag David B. Guettler, BS Captain

  15. Binaries Traveling through a Gaseous Medium: Dynamical Drag Forces and Internal Torques

    NASA Astrophysics Data System (ADS)

    Sánchez-Salcedo, F. J.; Chametla, Raul O.

    2014-10-01

    Using time-dependent linear theory, we investigate the morphology of the gravitational wake induced by a binary, whose center of mass moves at velocity {\\boldsymbol {V}}_cm against a uniform background of gas. For simplicity, we assume that the components of the binary are on circular orbits about their common center of mass. The consequences of dynamical friction is twofold. First, gas dynamical friction may drag the center of mass of the binary and cause the binary to migrate. Second, drag forces also induce a braking torque, which causes the orbits of the components of the binary to shrink. We compute the drag forces acting on one component of the binary due to the gravitational interaction with its own wake. We show that the dynamical friction force responsible for decelerating the center of mass of the binary is smaller than it is in the point-mass case because of the loss of gravitational focusing. We show that the braking internal torque depends on the Mach numbers of each binary component about their center of mass, and also on the Mach number of the center of mass of the binary. In general, the internal torque decreases with increasing the velocity of the binary relative to the ambient gas cloud. However, this is not always the case. We also mention the relevance of our results to the period distribution of binaries.

  16. Binaries traveling through a gaseous medium: dynamical drag forces and internal torques

    SciTech Connect

    Sánchez-Salcedo, F. J.; Chametla, Raul O.

    2014-10-20

    Using time-dependent linear theory, we investigate the morphology of the gravitational wake induced by a binary, whose center of mass moves at velocity V{sub cm} against a uniform background of gas. For simplicity, we assume that the components of the binary are on circular orbits about their common center of mass. The consequences of dynamical friction is twofold. First, gas dynamical friction may drag the center of mass of the binary and cause the binary to migrate. Second, drag forces also induce a braking torque, which causes the orbits of the components of the binary to shrink. We compute the drag forces acting on one component of the binary due to the gravitational interaction with its own wake. We show that the dynamical friction force responsible for decelerating the center of mass of the binary is smaller than it is in the point-mass case because of the loss of gravitational focusing. We show that the braking internal torque depends on the Mach numbers of each binary component about their center of mass, and also on the Mach number of the center of mass of the binary. In general, the internal torque decreases with increasing the velocity of the binary relative to the ambient gas cloud. However, this is not always the case. We also mention the relevance of our results to the period distribution of binaries.

  17. 78 FR 49484 - Exchange of Air Force Real Property for Non-Air Force Real Property

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-14

    ... Department of Air Force Exchange of Air Force Real Property for Non-Air Force Real Property SUMMARY: Notice identifies excess Federal real property under administrative jurisdiction of the United States Air Force it... under the administrative jurisdiction of the Air Force. FOR FURTHER INFORMATION CONTACT: Mr....

  18. Re-examination of compliant wall experiments in air with water substrates. [for drag reduction

    NASA Technical Reports Server (NTRS)

    Hefner, J. N.; Weinstein, L. M.

    1976-01-01

    A possible alternative explanation is proposed for compliant wall drag reductions measured in previous investigations. Standing waves were observed to form on the surfaces of compliant wall models in air with water substrates as the freestream velocity was increased from 15 to 30 m/s. These waves resembled sine waves with half of the wave protruding over the upstream portion of the model and the other half being recessed over the downstream end of the model. These data coupled with results of recent drag reduction experiments suggest that standing waves could have caused a shift in the model center of gravity creating a bending moment that was interpreted as a reduction in the skin friction drag.

  19. Bicycle Freewheeling with Air Drag as a Physics Experiment

    ERIC Educational Resources Information Center

    Janssen, Paul; Janssens, Ewald

    2015-01-01

    To familiarize first-year students with the important ingredients of a physics experiment, we offer them a project close to their daily life: measuring the effect of air resistance on a bicycle. Experiments are done with a bicycle freewheeling on a downhill slope. The data are compared with equations of motions corresponding to different models…

  20. A drag-based mechanism for vertical force production in the smallest flying insects

    NASA Astrophysics Data System (ADS)

    Jones, Shannon; Laurenza, Ryan; Miller, Laura

    2013-11-01

    Previous work has shown that the flight kinematics and aerodynamics of the smallest flying insects may be significantly different than that of their larger counterparts. These small insects, such as thrips and parasitoid wasps, are on the order of 1 mm in length and operate at a Reynolds number less than 10. Due to their small size and high wing beat frequency, quantitative data on the wing kinematics of the smallest insects is not available. As a result, there has been much debate and speculation about the flight strategies employed by these insects. With the challenges associated with generating lift at low Reynolds numbers, it could be beneficial for the smallest insects to use a drag-based motion to generate some or all of its vertical force, however this has not been rigorously investigated. We used computational fluid dynamics to investigate the feasibility of drag-based propulsion in the tiniest insects. We investigated the vertical force generated by an idealized drag-based vertical stroke over a range of Reynolds numbers from 1 to 150. We also compared this stroke to more conventional hovering stroke kinematics such as that of a fruit fly and dragonfly.

  1. Experimental study of the effect of drag reducing agent on pressure drop and thermal efficiency of an air cooler

    NASA Astrophysics Data System (ADS)

    Peyghambarzadeh, S. M.; Hashemabadi, S. H.; Saffarian, H.; Shekari, F.

    2016-01-01

    Effect of polymeric drag reduction agents (DRAs) on pressure drop and heat transfer was studied. Aqueous solutions of carboxy methyl cellulose were used inside an air-finned heat exchanger. Despite the previous studies which indicated the importance of drag reduction just in turbulent flow, results of this study in laminar flow indicated that the addition of DRA increases drag reduction, and decreases the overall heat transfer coefficient.

  2. Air Force Resiliency Program Overview

    DTIC Science & Technology

    2011-01-24

    Community that fosters mental, physical, social and spiritual fitness. Vision: A resilient Air Force Community ready to meet any challenge Whole Person...complete on-line survey to provide feedback on usefulness/helpfulness of SRS-I in assessing individual resiliency  AF Teen Council: First-ever AF-wide... Teen Leadership Council kicked off 6 Jan 11 with conf call  Focus: Collect info affecting teens ; address issues  Annual Youth of the Year Award

  3. A numerical study of air layer drag reduction phenomenon on a flat plate

    NASA Astrophysics Data System (ADS)

    Kim, Dokyun; Moin, Parviz

    2009-11-01

    The objective of the present study is to predict and understand the air layer drag reduction (ALDR) phenomenon. Recent experiments (Elbing et al. JFM 2008) have shown large net drag reductions if air is injected beyond a critical rate at the wall. The stability analysis and numerical simulations are performed to investigate mechanisms of ALDR on a flat plate using the same geometry as in the experiment. The linear stability of air-liquid interface is investigated by solving the Orr-Sommerfeld equations, and numerical simulations of two-phase flow have been performed to describe the evolution of air-water interface. The stability analysis shows that the air flow rates, Reynolds number, Weber number, and Froude number are important parameters determining the stability of the air layer. In laminar boundary layer, it is observed from the numerical simulations that the Froude number is the key to the stability of the air layer. The presentation will include a new and very efficient numerical method for two-phase flow calculations used in this study.

  4. United States Air Force Summary, Fifth Edition

    DTIC Science & Technology

    1979-03-01

    Center Armament Development & Test Center Air Force Civil Engrg Center Gen Alton D. Slay *It Gen G. H. Sylvester It Gen R. T. Marsh It Gen R. C. Henry...Systems Division Space and Missile Systems Organization Aerospace Medical Division Space & Missile Test Center Air Force FIight Test Center *Eff 1 Mar...will be lG Skantze **Mol Gen Selectee AIR FORCE COMMISSARY SERVICE Commander Mal Gen C. E. Woods AIR FORCE TEST AND EVAlUATION CENTER Commander Mal Gen

  5. Air Force Officer Evaluation System Project

    DTIC Science & Technology

    1987-01-01

    supervisor-subordinate relationships, and most private sector organizations ti"-n supervisors to give such feedback. AIR FORCE CULTURE o There exists...Alternative OER designs should reflect and sustain the larger Air Force culture ; 0 Within the Air Force, the alternative OER designs should encourage change...given the Air Force history and culture favoring "firewalling*, there is substantial risk that this approach would meet considerable resistance to

  6. Effects of Deformation on Drag and Lift Forces Acting on a Droplet in a Shear Flow

    NASA Astrophysics Data System (ADS)

    Suh, Youngho; Lee, Changhoon

    2010-11-01

    The droplet behavior in a linear shear flow is studied numerically to investigate the effect of deformation on the drag and lift acting on droplet. The droplet shape is calculated by a level set method which is improved by incorporating a sharp-interface modeling technique for accurately enforcing the matching conditions at the liquid- gas interface. By adopting the feedback forces which can maintain the droplet at a fixed position, we determine the acting force on a droplet in shear flow field with efficient handling of deformation. Based on the numerical results, drag and lift forces acting on a droplet are observed to depend strongly on the deformation. Droplet shapes are observed to be spherical, deformed, and oscillating depending on the Reynolds number. Also, the present method is proven to be applicable to a three- dimensional deformation of droplet in the shear flow, which cannot be properly analyzed by the previous studies. Comparisons of the calculated results by the current method with those obtained from body-fitted methods [Dandy and Leal, J. Fluid Mech. 208, 161 (1989)] and empirical models [Feng and Beard, J. Atmos. Sci. 48, 1856 (1991)] show good agreement.

  7. Physically-based modeling of drag force caused by natural woody vegetation

    NASA Astrophysics Data System (ADS)

    Järvelä, J.; Aberle, J.

    2014-12-01

    Riparian areas and floodplains are characterized by woody vegetation, which is an essential feature to be accounted for in many hydro-environmental models. For applications including flood protection, river restoration and modelling of sediment processes, there is a need to improve the reliability of flow resistance estimates. Conventional methods such as the use of lumped resistance coefficients or simplistic cylinder-based drag force equations can result in significant errors, as these methods do not adequately address the effect of foliage and reconfiguration of flexible plant parts under flow action. To tackle the problem, physically-based methods relying on objective and measurable vegetation properties are advantageous for describing complex vegetation. We have conducted flume and towing tank investigations with living and artificial plants, both in arrays and with isolated plants, providing new insight into advanced parameterization of natural vegetation. The stem, leaf and total areas of the trees confirmed to be suitable characteristic dimensions for estimating flow resistance. Consequently, we propose the use of leaf area index and leaf-to-stem-area ratio to achieve better drag force estimates. Novel remote sensing techniques including laser scanning have become available for effective collection of the required data. The benefits of the proposed parameterization have been clearly demonstrated in our newest experimental studies, but it remains to be investigated to what extent the parameter values are species-specific and how they depend on local habitat conditions. The purpose of this contribution is to summarize developments in the estimation of vegetative drag force based on physically-based approaches as the latest research results are somewhat dispersed. In particular, concerning woody vegetation we seek to discuss three issues: 1) parameterization of reconfiguration with the Vogel exponent; 2) advantage of parameterizing plants with the leaf area

  8. A Critical Review of the Drag Force on a Sphere in the Transition Flow Regime

    DTIC Science & Technology

    2005-07-13

    particle was performed by Millikan [10] as part of his landmark oil drop experiment. Millikan measured the drag force on oil droplets as they settled...latex particles using a modulated dynamic light scattering technique; a technique fundamentally different to that used by Millikan or Allen and Raabe...N.G., Phys. Fluids 15, 2352-2354 (2003). 10. Millikan , R.A., The Physical Review 22, 1-23 (1923). 11. Allen, M.D., and Raabe, O.G., J. Aerosol Sci

  9. A Case for Air Force Reorganization

    DTIC Science & Technology

    2013-04-01

    AFRC AETC AFSPC AMC AFSOC ACC AFGSC USAFE PACAF 4 10 19 12 14 18 ## 21 23 24 AU WC WPC SMC22 2 1 9 11 1375 208 17 15 3 Legend: AFMC–Air Force...Strike Command USAFE–US Air Forces in Europe WPC –Warrior Preparation Center PACAF–Pacic Air Forces = Recently Inactivated Figure 1. Organizational

  10. The Community College of the Air Force

    ERIC Educational Resources Information Center

    Phipps, John L.

    1975-01-01

    Community College of the Air Force, established at Randolf Air Force Base, Texas, is an accredited institution which acts as a centralized "broker" to keep track of student progress through a program of technical education oriented specifically to the professional preparation of noncommissioned officers by combining Air Force and…

  11. Theoretical Model of Drag Force Impact on a Model International Space Station (ISS) Satellite due to Solar Activity

    NASA Astrophysics Data System (ADS)

    Nwankwo, Victor U. J.; Chakrabarti, Sandip Kumar

    The International Space Station (ISS) is the single largest and most complex scientific and engineering space structure in human history. Its orbital parameters make it extremely vulnerable to severe atmospheric drag force. Complex interactions between solar energetic particles, ultraviolet (UV) radiation with atmosphere and geomagnetic field cause heating and subsequent expansion of the upper atmosphere. This condition increases drag on low Earth orbit satellites (LEOSs) and varies with current space weather conditions. In this work, we apply the NRLMSISE-00 empirical atmospheric density model, as a function of space environmental parameters, to model drag force impact on a model LEOS during variation of solar activity. Applying the resulting drag model on a model ISS satellite we observe that depending on the severity and/or stage of solar activity or cycle, a massive artificial satellite could experience orbit decay rate of up to 2.95km/month during solar maximum and up to 1km/month during solar minimum.

  12. Modelling LARES temperature distribution and thermal drag II: Numerical computation of current-epoch thermal forces

    NASA Astrophysics Data System (ADS)

    Brooks, Jason W.; Matzner, Richard

    2016-07-01

    produces all components of the thermally induced force on the satellite as a function of time throughout the orbit. We find that in the slow spin regime, although there are substantial excursions from the Fourier results, the Fourier results do provide good average values for the temperature of the CCRs (constant temperature in rows from the Fourier method), and for the daily along-track average drag. However, we also find that the relatively small average along-track drag (which swings between -0.7 pm/s2 and -0.25 pm/s2 and averages -0.50 pm/s2 over days 1460-1580) arises from instantaneous accelerations that have excursions that are about an order of magnitude larger than the resulting orbit-averaged drag. Note that neither the first paper nor this one addresses the additional particle drag on the satellite.

  13. Single Cell Mass Measurement Using Drag Force Inside Lab-on-Chip Microfluidics System.

    PubMed

    Rahman, Md Habibur; Ahmad, Mohd Ridzuan; Takeuchi, Masaru; Nakajima, Masahiro; Hasegawa, Yasuhisa; Fukuda, Toshio

    2015-12-01

    Single cell mass (SCM) is an intrinsic property of single cell, it arouses a great interest among scientists as cell mass depends on the synthesis of proteins, DNA replication, cell wall stiffness, cell cytoplasm density, cell growth, ribosome, and other analogous of organisms. To date, several great strides have been taken to the advancements of SCM measurement techniques. Nevertheless, more works are required to enable the technology to push frontier in deep analysis of SCM measurement, hence to elucidate intracellular properties. In this paper, we present a lab-on-chip microfluidics system for SCM measurement, related with the force required to drag a single cell and Newton's law of motion inside microfluidics channel. Drag force on the cell was generated by a pressure driven syringe micropump and the motion of the cell was measured using optical observation under an inverted microscope. This approach of measuring SCM was calibrated using known mass (77.3 pg) of a polystyrene particle of 5.2 μm diameter. Furthermore, we used Saccharomyces cerevisiae baker's yeast cells of different sizes ([Formula: see text] diameter) for SCM measurement. Mass of 4.4 μm diameter of single yeast cell was measured as 2.12 pg which is in the range of previously reported single yeast cell mass (2-3 pg). In addition, we also studied the relation between SCM and single cell size. Results showed that single yeast cell mass increases exponentially with the increasing of single cell size.

  14. Single Cell Mass Measurement Using Drag ForceInside Lab-on-Chip Microfluidics System.

    PubMed

    Rahman, Md; Ahmad, Mohd; Takeuchi, Masaru; Nakajima, Masahiro; Hasegawa, Yasuhisa; Fukuda, Toshio

    2015-12-22

    Single Cell Mass (SCM) is an intrinsic property of single cell, it arouses a great interest among scientists as cell mass depends on the synthesis of proteins, DNA replication, cell wall stiffness, cell cytoplasm density, cell growth, ribosome and other analogous of organisms. To date, several great strides have been taken to the advancements of SCM measurement techniques. Nevertheless, more works are required to enable the technology to push frontier in deep analysis of SCM measurement, hence to elucidate intracellular properties. In this paper, we present a Lab-on-Chip microfluidics system for SCM measurement, related with the force required to drag a single cell and Newton's law of motion inside microfluidics channel. Drag force on the cell was generated by a pressure driven syringe micropump and the motion of the cell was measured using optical observation under an inverted microscope. This approach of measuring SCM was calibrated using known mass (77.3 pg) of a polystyrene particle of 5.2 μm diameter. Furthermore, we used Saccharomyces cerevisiae baker's yeast cells of different sizes (2-7 μm diameter) for SCM measurement. Mass of 4.4 μm diameter of single yeast cell was measured as 2.12 pg which is in the range of previously reported single yeast cell mass (2-3 pg). In addition, we also studied the relation between SCM and single cell size. Results showed that single yeast cell mass increases exponentially with the increasing of single cell size.

  15. Discovering Air Force Identity: Airpower and Innovations

    DTIC Science & Technology

    2012-02-15

    Change Culture, Reverse Careerism.” Joint Force Quarterly, 58, 3rd Qtr 2010, 82-88; Carl H. Builder, The Icarus Syndrome : The Role of Air Power Theory...Themes in Messages from Top Air Force Leaders, 2005-2008, Documented briefing to United States Air Force (Arlington, VA: RAND, 2010); Colin S . Gray...its Impact on Retention, Research Report (Maxwell AFB, AL: Air Command and Staff College, 1 April 2002); Philip S . Meilinger, Airpower Myths and Facts

  16. The Air Advisor: The Face of US Air Force Engagement

    DTIC Science & Technology

    2013-08-01

    Senior Leader Perspective July–August 2013 Air & Space Power Journal | 4 The Air Advisor The Face of US Air Force Engagement Maj Gen Timothy M...The Air Advisor: The Face of US Air Force Engagement 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER...5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Air Force Research Institute,Air & Space Power Journal

  17. 26. "AIR INSTALLATIONS; EDWARDS AIR FORCE BASE, CALIFORNIA; HIGH SPEED ...

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

    26. "AIR INSTALLATIONS; EDWARDS AIR FORCE BASE, CALIFORNIA; HIGH SPEED TEST TRACK." Drawing No. 10-259. One inch to 400 feet plan of original 10,000-foot sled track. No date. No D.O. series number. No headings as above. - Edwards Air Force Base, South Base Sled Track, Edwards Air Force Base, North of Avenue B, between 100th & 140th Streets East, Lancaster, Los Angeles County, CA

  18. 11. COPY OF 1970 AERIAL PHOTOGRAPH OF LORING AIR FORCE ...

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

    11. COPY OF 1970 AERIAL PHOTOGRAPH OF LORING AIR FORCE BASE. PHOTOGRAPH LOCATED AT AIR FORCE BASE CONVERSION AGENCY, LORING AIR FORCE BASE, MAINE. - Loring Air Force Base, Airfield, Central portion of base, Limestone, Aroostook County, ME

  19. Air Force Security Forces Professionalism: Useful Insights for Leaders

    DTIC Science & Technology

    2013-03-27

    perceived ground force within an air force also renders its development analysis worthy. By careful study of Security Forces history , both written and...social science works, historical accounts of each period, and personal interviews. Additionally, Defenders of the Force: The History of the United...29 years in this period hold remarkably significant events in US history , they also hold events significant to the professionalization of Air Police

  20. A force balance system for the measurement of skin friction drag force

    NASA Technical Reports Server (NTRS)

    Moore, J. W.; Mcvey, E. S.

    1971-01-01

    Research on force balance instrumentation to measure the skin friction of hypersonic vehicles at extreme temperatures, high altitudes and in a vibration field is discussed. A rough overall summary and operating instructions for the equipment are presented.

  1. Contraction of high eccentricity satellite orbits using K-S elements with air drag.

    NASA Astrophysics Data System (ADS)

    Sharma, R. K.

    1998-06-01

    A new non-singular analytical theory for the contraction of high eccentricity satellite orbits under the influence of air drag is developed in terms of the K-S elements, using a spherically symmetrical atmospheric model. The series expansions include up to sixth power in terms of an independent variable λ, used by King-Hele in his theory. Numerical experimentation establishes a supremacy of the present theory over that of King-Hele over a wide range of the involved orbital parameters. The theory can be used effectively for the orbital decay of geostationary transfer orbits and during the mission planning of aeroassisted orbital transfer orbits.

  2. Geometry of halo and Lissajous orbits in the circular restricted three-body problem with drag forces

    NASA Astrophysics Data System (ADS)

    Pal, Ashok Kumar; Kushvah, Badam Singh

    2015-01-01

    In this paper, we determine the effect of radiation pressure, Poynting-Robertson drag and solar wind drag on the Sun-(Earth-Moon) restricted three-body problem. Here, we take the larger body of the Sun as a larger primary, and the Earth+Moon as a smaller primary. With the help of the perturbation technique, we find the Lagrangian points, and see that the collinear points deviate from the axis joining the primaries, whereas the triangular points remain unchanged in their configuration. We also find that Lagrangian points move towards the Sun when radiation pressure increases. We have also analysed the stability of the triangular equilibrium points and have found that they are unstable because of the drag forces. Moreover, we have computed the halo orbits in the third-order approximation using the Lindstedt-Poincaré method and have found the effect of the drag forces. According to this prevalence, the Sun-(Earth-Moon) model is used to design the trajectory for spacecraft travelling under drag forces.

  3. Electrostatic disturbance forces on a 3-axis drag-free sensor. [for earth satellite accelerometry

    NASA Technical Reports Server (NTRS)

    Hagstrom, T.; Sonnabend, D.; Vijayaraghavan, A.

    1982-01-01

    The electrostatic analysis of a multiple-capacitance 3-axis drag-free sensor is presented in this paper. The instrument consists of a proof-mass (a dense metallic ball) floating freely inside a spherical cavity enclosed by the sensor plates and the shield. Since the ball and the cavity are not necessarily concentric, the problem in three-dimensional potential theory for electrostatics is solved by the method of boundary perturbations and specifically in terms of spherical harmonics. The capacitance outputs of the instrument and the electrostatic forces acting on the system are derived as non-linear functions of the ball position, ball charge and the sensor plate potentials. The instrument sensitivity and cross-coupling effects are discussed. The analysis may also be useful for electrostatic gyros and suspensions.

  4. Reducing Air Force Fighter Pilot Shortages

    DTIC Science & Technology

    2015-12-31

    Albert A. Robbert, Anthony D. Rosello, Clarence R. Anderegg, John A. Ausink, James H. Bigelow, William W. Taylor, James Pita Reducing Air Force...Santa Monica, Calif. © Copyright 2015 RAND Corporation R® is a registered trademark. iii Preface The Air Force has faced a persistent challenge in...pilots in the reserve components. This research was sponsored by four elements of the U.S. Air Force: the Deputy Chief of Staff for Operations (AF/A3

  5. Annual Report 2009 (Project Air Force)

    DTIC Science & Technology

    2009-01-01

    64 USAF Project AIR FORCE Steering Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 RAND Project AIR FORCE Management ...that is established by Congress and managed by OSD. The director of opera- tions develops a budget and monitors project spending to control costs...helpful as possible.” 30 RAND Project AIR FORCE Cross-Cultural Competence and Mission Success TSgt Sherry Burt dances and sings with people from the

  6. Cheyenne Mountain Air Force Station NPDES Permit

    EPA Pesticide Factsheets

    Under NPDES permit CO-0034762, the Cheyenne Mountain Air Force Station is authorized to discharge from the interior storm drainage system and air exhaust stacks at the Cheyenne Mountain Complex, in El Paso County, Colorado, to tributaries Fountain Creek.

  7. Turbulence and turbulent drag reduction in swirling flow: Inertial versus viscous forcing.

    PubMed

    Burnishev, Yuri; Steinberg, Victor

    2015-08-01

    We report unexpected results of a drastic difference in the transition to fully developed turbulent and turbulent drag reduction (TDR) regimes and in their properties in a von Karman swirling flow with counter-rotating disks of water-based polymer solutions for viscous (by smooth disks) as well as inertial (by bladed disks) forcing and by tracking just torque Γ(t) and pressure p(t) . For the viscous forcing, just a single TDR regime is found with the transition values of the Reynolds number (Re) Re turb c =Re TDR c ≃(4.8±0.2)×10(5) independent of ϕ , whereas for the inertial forcing two turbulent regimes are revealed. The first transition is to fully developed turbulence, and the second one is to the TDR regime with both Re turb c and Re TDR c depending on polymer concentration ϕ . Both regimes differ by the values of C f and C p , by the scaling exponents of the fundamental turbulent characteristics, by the nonmonotonic dependencies of skewness and flatness of the pressure PDFs on Re, and by the different frequency power spectra of p with the different dependencies of the main vortex peak frequency in the p power spectra on ϕ and Re. Thus our experimental results show the transition to the TDR regime in a von Karman swirling flow for the viscous and inertial forcings in a sharp contrast to the recent experiments [Phys. Fluids 10, 426 (1998); Phys. Rev. E 47, R28(R) (1993); and J. Phys.: Condens. Matter 17, S1195 (2005)] where the transition to TDR is observed in the same swirling flow with counter-rotating disks only for the viscous forcing. The latter result has led its authors to the wrong conclusion that TDR is a solely boundary effect contrary to the inertial forcing associated with the bulk effect, and this conception is currently rather widely accepted in literature.

  8. The Air Force Nurse Intern Program.

    PubMed

    Smith, R H

    1991-08-01

    The Air Force Nurse Intern Program is a 5-month-long introduction to Air Force nursing for BSN-prepared graduate nurses. The program is designed to facilitate the transition from civilian nursing student to practicing Air Force Nurse Corps Officer. After attending Military Indoctrination for Medical Service Officers, newly commissioned nurses attend the program at one of 10 Air Force medical centers before going to their permanent duty stations. Preceptors guide and instruct the interns at each of four clinical rotation sites. The author, a former nurse intern, describes some of the many opportunities available to nurse interns.

  9. Air Force standards for nickel hydrogen battery

    NASA Technical Reports Server (NTRS)

    Hwang, Warren; Milden, Martin

    1994-01-01

    The topics discussed are presented in viewgraph form and include Air Force nickel hydrogen standardization goals, philosophy, project outline, cell level standardization, battery level standardization, and schedule.

  10. Interactions between orographic gravity wave drag and forced stationary planetary waves in the winter northern hemisphere middle atmosphere

    SciTech Connect

    McLandress, C. ); McFarlane, N.A. )

    1993-07-01

    A quasigeostrophic model is used to study the combined interaction among orographically generated gravity wave drag, forced planetary waves, and zonal mean flows in the Northern Hemisphere winter stratosphere and mesosphere. The localized gravity wave drag is shown to generate planetary waves in the mesosphere that, in turn, exert a substantial drag on the zonal mean flow via the Eliassen-Palm flux divergence. The amount of planetary wave drag is found to depend not only on the presence of the localized source of orographic gravity wave drag but also on the presence of upward-propagating planetary waves in the lower stratosphere. The zonal mean wind field exhibits a split jet structure with the larger jet maximum situated in the upper stratosphere at 30[degrees]N. This feature is shown to arise from the presence of weak winds above the subtropical tropospheric jet maximum, which results in a region of low-level gravity wave breaking and reduced drag and larger winds above. 33 refs., 18 figs.

  11. The control of flight force by a flapping wing: lift and drag production.

    PubMed

    Sane, S P; Dickinson, M H

    2001-08-01

    We used a dynamically scaled mechanical model of the fruit fly Drosophila melanogaster to study how changes in wing kinematics influence the production of unsteady aerodynamic forces in insect flight. We examined 191 separate sets of kinematic patterns that differed with respect to stroke amplitude, angle of attack, flip timing, flip duration and the shape and magnitude of stroke deviation. Instantaneous aerodynamic forces were measured using a two-dimensional force sensor mounted at the base of the wing. The influence of unsteady rotational effects was assessed by comparing the time course of measured forces with that of corresponding translational quasi-steady estimates. For each pattern, we also calculated mean stroke-averaged values of the force coefficients and an estimate of profile power. The results of this analysis may be divided into four main points. (i) For a short, symmetrical wing flip, mean lift was optimized by a stroke amplitude of 180 degrees and an angle of attack of 50 degrees. At all stroke amplitudes, mean drag increased monotonically with increasing angle of attack. Translational quasi-steady predictions better matched the measured values at high stroke amplitude than at low stroke amplitude. This discrepancy was due to the increasing importance of rotational mechanisms in kinematic patterns with low stroke amplitude. (ii) For a 180 degrees stroke amplitude and a 45 degrees angle of attack, lift was maximized by short-duration flips occurring just slightly in advance of stroke reversal. Symmetrical rotations produced similarly high performance. Wing rotation that occurred after stroke reversal, however, produced very low mean lift. (iii) The production of aerodynamic forces was sensitive to changes in the magnitude of the wing's deviation from the mean stroke plane (stroke deviation) as well as to the actual shape of the wing tip trajectory. However, in all examples, stroke deviation lowered aerodynamic performance relative to the no

  12. Computation of H2/air reacting flowfields in drag-reduction external combustion

    NASA Technical Reports Server (NTRS)

    Lai, H. T.

    1992-01-01

    Numerical simulation and analysis of the solution are presented for a laminar reacting flowfield of air and hydrogen in the case of external combustion employed to reduce base drag in hypersonic vehicles operating at transonic speeds. The flowfield consists of a transonic air stream at a Mach number of 1.26 and a sonic transverse hydrogen injection along a row of 26 orifices. Self-sustained combustion is computed over an expansion ramp downstream of the injection and a flameholder, using the recently developed RPLUS code. Measured data is available only for surface pressure distributions and is used for validation of the code in practical 3D reacting flowfields. Pressure comparison shows generally good agreements, and the main effects of combustion are also qualitatively consistent with experiment.

  13. Air Force Research Laboratory’s Focused Long Term Challenges

    DTIC Science & Technology

    2008-04-01

    Air Force Research Laboratory ( AFRL ) mission is to provide support to the Air Force (AF) and the warfighters with... Air Force Research Laboratory’s Focused Long Term Challenges Leo J Rose Munitions Directorate, Air Force Research Laboratory , 101 W Eglin Blvd...This technology vision, which was born in our Air Force Research Laboratory , builds on the Air Force’s traditional kill

  14. NASA/Air Force Cost Model: NAFCOM

    NASA Technical Reports Server (NTRS)

    Winn, Sharon D.; Hamcher, John W. (Technical Monitor)

    2002-01-01

    The NASA/Air Force Cost Model (NAFCOM) is a parametric estimating tool for space hardware. It is based on historical NASA and Air Force space projects and is primarily used in the very early phases of a development project. NAFCOM can be used at the subsystem or component levels.

  15. Development of a remotely controlled testing platform with low-drag air-ventilated hull

    NASA Astrophysics Data System (ADS)

    Matveev, Konstantin I.; Perry, Nicholaus I.; Mattson, Alexander W.; Chaney, Christopher S.

    2015-03-01

    This paper addresses the development and testing of a remotely controlled boat platform with an innovative air-ventilated hull. The application of air cavities on the underside of ship hulls is a promising means for reducing hydrodynamic drag and pollutant emissions and increasing marine transportation efficiency. Despite this concept's potential, design optimization and high-performance operation of novel air-cavity ships remain a challenging problem. Hull construction and sensor instrumentation of the model-scale air-cavity boat is described in the paper. The modular structure of the hull allows for easy modifications, and an electric propulsion unit enables self-propelled operation. The boat is controlled remotely via a radio transmission system. Results of initial tests are reported, including thrust, speed, and airflow rate in several loading conditions. The constructed platform can be used for optimizing air-cavity systems and testing other innovative hull designs. This system can be also developed into a high-performance unmanned boat.

  16. Microfluidic acoustic trapping force and stiffness measurement using viscous drag effect.

    PubMed

    Lee, Jungwoo; Jeong, Jong Seob; Shung, K Kirk

    2013-01-01

    It has recently been demonstrated that it was possible to individually trap 70μm droplets flowing within a 500μm wide microfluidic channel by a 24MHz single element piezo-composite focused transducer. In order to further develop this non-invasive approach as a microfluidic particle manipulation tool of high precision, the trapping force needs to be calibrated to a known force, i.e., viscous drag force arising from the fluid flow in the channel. However, few calibration studies based on fluid viscosity have been carried out with focused acoustic beams for moving objects in microfluidic environments. In this paper, the acoustic trapping force (F(trapping)) and the trap stiffness (or compliance k) are experimentally determined for a streaming droplet in a microfluidic channel. F(trapping) is calibrated to viscous drag force produced from syringe pumps. Chebyshev-windowed chirp coded excitation sequences sweeping the frequency range from 18MHz to 30MHz is utilized to drive the transducer, enabling the beam transmission through the channel/fluid interface for interrogating the droplets inside the channel. The minimum force (F(min,trapping)) required for initially immobilizing drifting droplets is determined as a function of pulse repetition frequency (PRF), duty factor (DTF), and input voltage amplitude (V(in)) to the transducer. At PRF=0.1kHz and DTF=30%, F(min,trapping) is increased from 2.2nN for V(in)=22V(pp) to 3.8nN for V(in)=54V(pp). With a fixed V(in)=54V(pp) and DTF=30%, F(min,trapping) can be varied from 3.8nN at PRF=0.1kHz to 6.7nN at PRF=0.5kHz. These findings indicate that both higher driving voltage and more frequent beam transmission yield stronger traps for holding droplets in motion. The stiffness k can be estimated through linear regression by measuring the trapping force (F(trapping)) corresponding to the displacement (x) of a droplet from the trap center. By plotting F(trapping) - x curves for certain values of V(in) (22/38/54V(pp)) at DTF=10% and

  17. Using Wind Setdown and Storm Surge on Lake Erie to Calibrate the Air-Sea Drag Coefficient

    PubMed Central

    Drews, Carl

    2013-01-01

    The air-sea drag coefficient controls the transfer of momentum from wind to water. In modeling storm surge, this coefficient is a crucial parameter for estimating the surge height. This study uses two strong wind events on Lake Erie to calibrate the drag coefficient using the Coupled Ocean Atmosphere Wave Sediment Transport (COAWST) modeling system and the the Regional Ocean Modeling System (ROMS). Simulated waves are generated on the lake with Simulating WAves Nearshore (SWAN). Wind setdown provides the opportunity to eliminate wave setup as a contributing factor, since waves are minimal at the upwind shore. The study finds that model results significantly underestimate wind setdown and storm surge when a typical open-ocean formulation without waves is used for the drag coefficient. The contribution of waves to wind setdown and storm surge is 34.7%. Scattered lake ice also increases the effective drag coefficient by a factor of 1.1. PMID:23977309

  18. Using wind setdown and storm surge on Lake Erie to calibrate the air-sea drag coefficient.

    PubMed

    Drews, Carl

    2013-01-01

    The air-sea drag coefficient controls the transfer of momentum from wind to water. In modeling storm surge, this coefficient is a crucial parameter for estimating the surge height. This study uses two strong wind events on Lake Erie to calibrate the drag coefficient using the Coupled Ocean Atmosphere Wave Sediment Transport (COAWST) modeling system and the the Regional Ocean Modeling System (ROMS). Simulated waves are generated on the lake with Simulating WAves Nearshore (SWAN). Wind setdown provides the opportunity to eliminate wave setup as a contributing factor, since waves are minimal at the upwind shore. The study finds that model results significantly underestimate wind setdown and storm surge when a typical open-ocean formulation without waves is used for the drag coefficient. The contribution of waves to wind setdown and storm surge is 34.7%. Scattered lake ice also increases the effective drag coefficient by a factor of 1.1.

  19. Aircraft Drag Prediction and Reduction

    DTIC Science & Technology

    1985-07-01

    a) - The first example deals with the conformal weapons carriage experimentaly mounted on a F-4 " Phantom " Airplane (US Navy/Air Force/’ASA/Boeing...aerodynamic surfaces. I) ( dCm /dCL) This has, however, the disadvantage that DRAG FORWARD FIXATION one must deal with a relatively thick, though turbulent

  20. Turbulence and turbulent drag reduction in swirling flow: Inertial versus viscous forcing

    NASA Astrophysics Data System (ADS)

    Burnishev, Yuri; Steinberg, Victor

    2015-08-01

    We report unexpected results of a drastic difference in the transition to fully developed turbulent and turbulent drag reduction (TDR) regimes and in their properties in a von Karman swirling flow with counter-rotating disks of water-based polymer solutions for viscous (by smooth disks) as well as inertial (by bladed disks) forcing and by tracking just torque Γ (t ) and pressure p (t ) . For the viscous forcing, just a single TDR regime is found with the transition values of the Reynolds number (Re) Recturb=RecTDR≃(4.8 ±0.2 ) ×105 independent of ϕ , whereas for the inertial forcing two turbulent regimes are revealed. The first transition is to fully developed turbulence, and the second one is to the TDR regime with both Recturb and RecTDR depending on polymer concentration ϕ . Both regimes differ by the values of Cf and Cp, by the scaling exponents of the fundamental turbulent characteristics, by the nonmonotonic dependencies of skewness and flatness of the pressure PDFs on Re, and by the different frequency power spectra of p with the different dependencies of the main vortex peak frequency in the p power spectra on ϕ and Re. Thus our experimental results show the transition to the TDR regime in a von Karman swirling flow for the viscous and inertial forcings in a sharp contrast to the recent experiments [Phys. Fluids 10, 426 (1998), 10.1063/1.869532; Phys. Rev. E 47, R28(R) (1993), 10.1103/PhysRevE.47.R28; and J. Phys.: Condens. Matter 17, S1195 (2005), 10.1088/0953-8984/17/14/008] where the transition to TDR is observed in the same swirling flow with counter-rotating disks only for the viscous forcing. The latter result has led its authors to the wrong conclusion that TDR is a solely boundary effect contrary to the inertial forcing associated with the bulk effect, and this conception is currently rather widely accepted in literature.

  1. Phoretic drag reduction of chemically active homogeneous spheres under force fields and shear flows

    NASA Astrophysics Data System (ADS)

    Yariv, Ehud; Kaynan, Uri

    2017-01-01

    Surrounded by a spherically symmetric solute cloud, chemically active homogeneous spheres do not undergo conventional autophoresis when suspended in an unbounded liquid domain. When exposed to external flows, solute advection deforms that cloud, resulting in a generally asymmetric distribution of diffusio-osmotic slip which, in turn, modifies particle motion. Inspired by classical forced-convection analyses [Acrivos and Taylor, Phys. Fluids 5, 387 (1962), 10.1063/1.1706630; Frankel and Acrivos, Phys. Fluids 11, 1913 (1968), 10.1063/1.1692218] we illustrate this phoretic phenomenon using two prototypic configurations, one where the particle sediments under a uniform force field and one where it is subject to a simple shear flow. In addition to the Péclet number Pe associated with the imposed flow, the governing nonlinear problem also depends upon α , the intrinsic Péclet number associated with the chemical activity of the particle. As in the forced-convection problems, the small-Péclet-number limit is nonuniform, breaking down at large distances away from the particle. Calculation of the leading-order autophoretic effects thus requires use of matched asymptotic expansions, the outer region being at distances that scale inversely with Pe and Pe1 /2 in the respective sedimentation and shear problems. In the sedimentation problem we find an effective drag reduction of fractional amount α /8 ; in the shear problem we find that the magnitude of the stresslet is decreased by a fractional amount α /4 . For a dilute particle suspension the latter result is manifested by a reduction of the effective viscosity.

  2. Air Force Research Laboratory Preparation for Year 2000.

    DTIC Science & Technology

    2007-11-02

    Air Force Research Laboratory , Phillips Research Site , Kirkland Air Force Base, New...Pentagon, Washington, D.C. 20301-1900. The identity of each writer and caller is fully protected. Acronym AFRL Air Force Research Laboratory INSPECTOR...completion of the implementation phase was May 31, 1999. Air Force Research Laboratory . The Air Force Research

  3. Air Force Office of Scientific Research 1991 Research Highlights

    DTIC Science & Technology

    1991-01-01

    research at Air Force Europe, allied victory in the Persian Gulf con- programs totaling nearly $300 million annual- laboratories . Air Force ...transitioning nological environment? laboratories and research centers into four research accomplishments for Air Force use. In this added role as... Air Force’s saries; maintaining a strong research Organizationally, AFOSR has also glo ehran gol per infrastructure among Air Force

  4. Air Force Weapons Laboratory Computational Requirements for 1976 Through 1980

    DTIC Science & Technology

    1976-01-01

    Air Force Weapons Laboratory , Attn: DYS, Kirtland AFB, NM 87117...final report was prepared by the Air Force Weapons Laboratory , Kirtland Air Force Base, New Mexico under Job Order 06CB. Dr. Clifford E. Rhoades, Jr... Force Base, New Mexico 87117 62601F, 06CB II. CONTROLLING OFFICE NAME AND ADDRESS Ai"- Force Weapons Laboratory / Jan 1076 Kirtland Air Force Base,

  5. Vorticity confinement technique for drag prediction

    NASA Astrophysics Data System (ADS)

    Povitsky, Alex; Snyder, Troy

    2011-11-01

    This work couples wake-integral drag prediction and vorticity confinement technique (VC) for the improved prediction of drag from CFD simulations. Induced drag computations of a thin wing are shown to be more accurate than the more widespread method of surface pressure integration when compared to theoretical lifting-line value. Furthermore, the VC method improves trailing vortex preservation and counteracts the shift from induced drag to numerical entropy drag with increasing distance of Trefftz plane downstream of the wing. Accurate induced drag prediction via the surface integration of pressure barring a sufficiently refined surface grid and increased computation time. Furthermore, the alternative wake-integral technique for drag prediction suffers from numerical dissipation. VC is shown to control the numerical dissipation with very modest computational overhead. The 2-D research code is used to test specific formulations of the VC body force terms and illustrate the computational efficiency of the method compared to a ``brute force'' reduction in spatial step size. For the 3-D wing simulation, ANSYS FLUENT is employed with the VC body force terms added to the solver with user-defined functions (UDFs). VC is successfully implemented to highly unsteady flows typical for Micro Air Vehicles (MAV) producing oscillative drag force either by natural vortex shedding at high angles of attack or by flapping wing motion.

  6. Air Force Combat Support: Adjusting Doctrine to Meet Expeditionary Air Force Requirements

    DTIC Science & Technology

    2007-11-02

    Force Battlelab Briefing”: U.S Air Force Air Expeditionary Force Battlelab Web Page, on-line, Netscape , 15 Mar 00, available from www.mountain.af.mil...Expeditionary Air Force Web Site, slide 4, on- line, Netscape , 2 Apr 00, www.af.mil/eaf/master.ppt This slide portrays how the Air Force has changed since...Center Web Page, on-line, Netscape , 26 Mar 00, available from www.hqafdc.maxwell.af.mil/library/doctrine/afdd2brief.ppt: slide 2 2 “The little

  7. Rotating flexible drag mill

    DOEpatents

    Pepper, W.B.

    1984-05-09

    A rotating parachute for decelerating objects travelling through atmosphere at subsonic or supersonic deployment speeds includes a circular canopy having a plurality of circumferentially arranged flexible panels projecting radially from a solid central disk. A slot extends radially between adjacent panels to the outer periphery of the canopy. Upon deployment, the solid disk diverts air radially to rapidly inflate the panels into a position of maximum diameter. Air impinging on the panels adjacent the panel slots rotates the parachute during its descent. Centrifugal force flattens the canopy into a constant maximum diameter during terminal descent for maximum drag and deceleration.

  8. Computational analysis of magnetic field induced deposition of magnetic particles in lung alveolus in comparison to deposition produced with viscous drag and gravitational force

    NASA Astrophysics Data System (ADS)

    Krafcik, Andrej; Babinec, Peter; Frollo, Ivan

    2015-04-01

    Magnetic targeting of drugs attached to magnetic nanoparticles with diameter ≈ 100 nm after their intravenous administration is an interesting method of drug delivery widely investigated both theoretically as well as experimentally. Our aim in this study is theoretical analysis of a magnetic aerosol targeting to the lung. Due to lung anatomy magnetic particles up to 5 μm can be safely used, therefore the magnetic force would be stronger, moreover drag force exerted on the particle is according to Stokes law linearly dependent on the viscosity, would be weaker, because the viscosity of the air in the lung is approximately 200 fold smaller than viscosity of the blood. Lung therefore represents unique opportunity for magnetic drug targeting, as we have shown in this study by the analysis of magnetic particle dynamics in a rhythmically expanding and contracting distal and proximal alveolus subjected to high-gradient magnetic field generated by quadrupolar permanent Halbach magnet array.

  9. List of EPA Certified Forced-Air Furnaces

    EPA Pesticide Factsheets

    The EPA-Certified Forced-Air Furnace list contains EPA-certified forced-air furnaces that meet the 2015 NSPS for New Residential Wood Heaters, New Residential Hydronic Heaters and Forced-Air Furnaces.

  10. Air Force Academy MS4 NPDES Permit

    EPA Pesticide Factsheets

    Under NPDES permit CO-R042007, the U.S. Air Force Academy is authorized to discharge from all municipal separate storm sewer system outfalls to the receiving waters specified in the permit in El Paso County, Colorado.

  11. United States Air Force Wipe Solvent Testing

    NASA Technical Reports Server (NTRS)

    Hornung, Steven D.; Beeson, Harold D.

    2000-01-01

    The Wright-Patterson Air Force Base (WPAFB), as part of the Air Force Material Command, requested that NASA Johnson Space Center (JSC) White Sands Test Facility (WSTF) conduct testing and analyses in support of the United States Air Force Wipe Solvent Development Project. The purpose of the wipe solvent project is to develop an alternative to be used by Air Force flight line and maintenance personnel for the wipe cleaning of oxygen equipment. This report provides material compatibility, liquid oxygen (LOX) mechanical impact, autogenous ignition temperature (AIT), and gauge cleaning test data for some of the currently available solvents that may be used to replace CFC-113 and methyl chloroform. It provides data from previous WSTF test programs sponsored by the Naval Sea Systems Command, the Kennedy Space Center, and other NASA programs for the purpose of assisting WP AFB in identifying the best alternative solvents for validation testing.

  12. Drag force and transport property of a small cylinder in free molecule flow: A gas-kinetic theory analysis

    NASA Astrophysics Data System (ADS)

    Liu, Changran; Li, Zhigang; Wang, Hai

    2016-08-01

    Analytical expressions are derived for aerodynamic drag force on small cylinders in the free molecule flow using the gas-kinetic theory. The derivation considers the effect of intermolecular interactions between the cylinder and gas media. Two limiting collision models, specular and diffuse scattering, are investigated in two limiting cylinder orientations with respect to the drift velocity. The earlier solution of Dahneke [B. E. Dahneke, J. Aerosol Sci. 4, 147 (1973), 10.1016/0021-8502(73)90066-9] is shown to be a special case of the current expressions in the rigid-body limit of collision. Drag force expressions are obtained for cylinders that undergo Brownian rotation and for those that align with the drift velocity. The validity of the theoretical expressions is tested against experimental mobility data available for carbon nanotubes.

  13. International Cooperation with Partner Air Forces

    DTIC Science & Technology

    2009-01-01

    Programming Guidance ASD Assistant Secretary of Defense ASDF Air Self-Defense Forces (Japan) AWACS Airborne Warning and Control System BPC Building...provided training in the use of medical and engineering equipment to civilians in Iraq and East Timor. The Air Self-Defense Forces ( ASDF ) face the most...Southeast Asia and the MSDF is engaged in training the Coast Guard trainers. But the ASDF has few noncombat missions and little equipment that is not

  14. Unsteady Motion, Finite Reynolds Numbers, and Wall Effect on Vorticella convallaria Contribute Contraction Force Greater than the Stokes Drag

    PubMed Central

    Ryu, Sangjin; Matsudaira, Paul

    2010-01-01

    Abstract Contraction of Vorticella convallaria, a sessile ciliated protozoan, is completed within a few milliseconds and results in a retraction of its cell body toward the substratum by coiling its stalk. Previous studies have modeled the cell body as a sphere and assumed a drag force that satisfies Stokes' law. However, the contraction-induced flow of the medium is transient and bounded by the substrate, and the maximum Reynolds number is larger than unity. Thus, calculations of contractile force from the drag force are incomplete. In this study, we analyzed fluid flow during contraction by the particle tracking velocimetry and computational fluid dynamics simulations to estimate the contractile force. Particle paths show that the induced flow is limited by the substrate. Simulation-based force estimates suggest that the combined effect of the flow unsteadiness, the finite Reynolds number, and the substrate comprises 35% of the total force. The work done in the early stage of contraction and the maximum power output are similar regardless of the medium viscosity. These results suggest that, during the initial development of force, V. convallaria uses a common mechanism for performing mechanical work irrespective of viscous loading conditions. PMID:20513401

  15. Unsteady motion, finite Reynolds numbers, and wall effect on Vorticella convallaria contribute contraction force greater than the stokes drag.

    PubMed

    Ryu, Sangjin; Matsudaira, Paul

    2010-06-02

    Contraction of Vorticella convallaria, a sessile ciliated protozoan, is completed within a few milliseconds and results in a retraction of its cell body toward the substratum by coiling its stalk. Previous studies have modeled the cell body as a sphere and assumed a drag force that satisfies Stokes' law. However, the contraction-induced flow of the medium is transient and bounded by the substrate, and the maximum Reynolds number is larger than unity. Thus, calculations of contractile force from the drag force are incomplete. In this study, we analyzed fluid flow during contraction by the particle tracking velocimetry and computational fluid dynamics simulations to estimate the contractile force. Particle paths show that the induced flow is limited by the substrate. Simulation-based force estimates suggest that the combined effect of the flow unsteadiness, the finite Reynolds number, and the substrate comprises 35% of the total force. The work done in the early stage of contraction and the maximum power output are similar regardless of the medium viscosity. These results suggest that, during the initial development of force, V. convallaria uses a common mechanism for performing mechanical work irrespective of viscous loading conditions.

  16. Shaping the Future Air Force

    DTIC Science & Technology

    2006-01-01

    quickly to fast -developing events should, for instance, China attempt to resolve the Taiwan question by force of arms in a matter of days instead of...increasing capabilities of enemy “anti-access” weapons and the lack of available time to forward deploy forces during fast -moving crises and conflicts...as in the Korean case, the United States could find itself having only a limited ability to prevent the enemy from achieving its goals. The loss of

  17. Variations of Drag Forces on Two Close-Following Vehicles in a Back-to-Back Configuration

    NASA Astrophysics Data System (ADS)

    Marcu, Bogdan; Browand, Fred; Hammache, Mustapha

    1998-11-01

    Measurements of drag, side forces and yawing moment are made for each of a two-vehicle platoon, using 1/8 scale models of 1991 Chevy Lumina minivans equipped with force balances. The models are placed in a wind tunnel in a close following configuration, but with the trailing car placed in reverse - with its back forward towards the leading car - a configuration referred to as a "back-to-back configuration". The vehicle models are supported above a ground plane whose surface is porous. The boundary layer forming on the ground plane is removed by applying a small suction on the porous surface. Measurements are made for longitudinal spacing ranging from 0 to 0.4 vehicle lengths and alignments in the range of 0.025 car widths left to 0.025 car widths right of the centered position Meas urements reveal a very surprising phenomenon: the aerodynamic drag force on the leading vehicle is found to vary from a low value of 0.45 at zero spacing to a peak value of 0.95-1.0 at a spacing of approximately 0.08 vehicle lengths. For spacing values larger than 0.1 vehicle lengths the leading vehicle drag quickly diminishes to a 0.6-0.65 value. Hysteresis is observed. A discussion of this phenomenon is provided along with a possible explanation based on hot wire and DPIV intervehicle flow measurements.

  18. Graduate Education of Air Force Line Officers.

    ERIC Educational Resources Information Center

    Taylor, John N.; Valentine, Dennis E.

    This study was undertaken as a quantitative description of graduate degree holders within the Air Force line officer force; specifically, those on active duty between 1961 and 1968. Basic data sources were the Uniform Officer Record (UOR) and the UOR reformat, a historical research file maintained by the Personnel Research Division. Records of…

  19. Air Force Technical Objective Document FY 87

    DTIC Science & Technology

    1985-12-01

    Multiple Applications Propulsion Technology I. 1000W Arcjet 2. Mognetoplasmadynamic Thermal Manogement 3. Advanced Electr ic ACS 4. Antimatter ...to the genera. public. including fo~gn nallonall. , Ai r Force Rocket Propulsion Laboratory Ai r Force Space Technology Center Space Division...t<~ DON A. HART Director, Air Force Rocket Propulsion Laboratory If you r address has changed; if you wish to be removed from our mailing list

  20. Cells in 3D matrices under interstitial flow: effects of extracellular matrix alignment on cell shear stress and drag forces.

    PubMed

    Pedersen, John A; Lichter, Seth; Swartz, Melody A

    2010-03-22

    Interstitial flow is an important regulator of various cell behaviors both in vitro and in vivo, yet the forces that fluid flow imposes on cells embedded in a 3D extracellular matrix (ECM), and the effects of matrix architecture on those forces, are not well understood. Here, we demonstrate how fiber alignment can affect the shear and pressure forces on the cell and ECM. Using computational fluid dynamics simulations, we show that while the solutions of the Brinkman equation accurately estimate the average fluid shear stress and the drag forces on a cell within a 3D fibrous medium, the distribution of shear stress on the cellular surface as well as the peak shear stresses remain intimately related to the pericellular fiber architecture and cannot be estimated using bulk-averaged properties. We demonstrate that perpendicular fiber alignment of the ECM yields lower shear stress and pressure forces on the cells and higher stresses on the ECM, leading to decreased permeability, while parallel fiber alignment leads to higher stresses on cells and increased permeability, as compared to a cubic lattice arrangement. The Spielman-Goren permeability relationships for fibrous media agreed well with CFD simulations of flow with explicitly considered fibers. These results suggest that the experimentally observed active remodeling of ECM fibers by fibroblasts under interstitial flow to a perpendicular alignment could serve to decrease the shear and drag forces on the cell.

  1. Comparing the drag force on heavy quarks in N=4 super-Yang-Mills theory and QCD

    SciTech Connect

    Gubser, Steven S.

    2007-12-15

    Computations of the drag force on a heavy quark moving through a thermal state of strongly coupled N=4 super-Yang-Mills theory have appeared recently. I compare the strength of this effect between N=4 gauge theory and QCD, using the static force between external quarks to normalize the 't Hooft coupling. Comparing N=4 and QCD at fixed energy density then leads to a relaxation time of roughly 2 fm/c for charm quarks moving through a quark-gluon plasma at T=250 MeV. This estimate should be regarded as preliminary because of the difficulties of comparing two such different theories.

  2. Force Structure: Preliminary Observations on Air Force A-10 Divestment

    DTIC Science & Technology

    2015-06-25

    disclosure . Therefore, this report omits certain information about military plans or operations, vulnerabilities or capabilities of systems or...Special Operations Command; Headquarters Air Force (A3, A5, A8, A9, and Financial Management); Air Combat Command (A3, A4, A5, and A8); Army (G-3/5/7 and...copyrighted images or other material , permission from the copyright holder may be necessary if you wish to reproduce this material separately. Page 9

  3. Sharp Transition in the Lift Force of a Fluid Flowing Past Nonsymmetrical Obstacles: Evidence for a Lift Crisis in the Drag Crisis Regime.

    PubMed

    Bot, Patrick; Rabaud, Marc; Thomas, Goulven; Lombardi, Alessandro; Lebret, Charles

    2016-12-02

    Bluff bodies moving in a fluid experience a drag force which usually increases with velocity. However in a particular velocity range a drag crisis is observed, i.e., a sharp and strong decrease of the drag force. This counterintuitive result is well characterized for a sphere or a cylinder. Here we show that, for an object breaking the up-down symmetry, a lift crisis is observed simultaneously to the drag crisis. The term lift crisis refers to the fact that at constant incidence the time-averaged transverse force, which remains small or even negative at low velocity, transitions abruptly to large positive values above a critical flow velocity. This transition is characterized from direct force measurements as well as from change in the velocity field around the obstacle.

  4. Air Force Enlisted Force Management: System Interactions and Synchronization Strategies

    DTIC Science & Technology

    2007-01-01

    NCO noncommissioned officer NPS non-prior service OSD Office of the Secretary of Defense OSI Office of Special Investigations PFE Promotion Fitness Exam...of airmen with disciplinary or low performance issues. 44 Air Force Enlisted Force Management ness exam ( PFE ), score on the Skills Knowledge Test...serpentine logic trail: Suppose an AFSC has a difficult SKT or a difficult version of the PFE . Tests that are more difficult lead to a wider range of

  5. Changing the Air Force Narrative

    DTIC Science & Technology

    2014-10-14

    tablets and televisions as well (Lessin and Ante, 2013). Similarly, few things capture the imagination of today’s youth like video games, and few adults...has had to take with recent scandals. A simple Google News search of the term “Air Force” reveals mainly articles about sexual assault, suicide ...The Bully -pulpit: Theodore Roosevelt, William Howard Taft, and the Golden Age of Journalism. New York: Simon and Schuster. Greenert, J. and Welsh, M

  6. Comment on ``Measurement of the ion drag force on falling dust particles and its relation to the void formation in complex (dusty) plasmas'' [Phys. Plasmas 10, 1278 (2003)

    NASA Astrophysics Data System (ADS)

    Khrapak, S. A.; Ivlev, A. V.; Morfill, G. E.; Thomas, H. M.; Zhdanov, S. K.; Konopka, U.; Thoma, M. H.; Quinn, R. A.

    2003-11-01

    It is shown that the quantitative interpretation of recent experiments to determine the ion drag force in complex (dusty) plasmas [C. Zafiu, A. Melzer, and A. Piel, Phys. Plasmas 9, 4794 (2002); 10, 1278 (2003)] is not correct. A comparison of different models of the ion drag force is carried out to illustrate the complexity of this issue and to highlight the current level of the research.

  7. Overview--Air Force policy on halons.

    PubMed

    Morehouse, E T

    1993-05-01

    Halons have been used for decades by the Air Force for a variety of fire protection applications. Their unique combination of effectiveness, low toxicity, ease of use, cleanliness, and low manufacturing cost appear to make them ideal for many situations. Unfortunately, they also deplete the earth's protective ozone layer and, consequently, their production is being phased out globally under the Montreal Protocol. United States legislation implementing the terms of the Protocol required an end to production of ozone depleting chemicals (ODCs) by the year 2000. In November 1991, the Air Force issued a policy requiring an end to ODC purchases by the end of 1997. In February 1992, President Bush announced an even more accelerated phaseout to 1995. The Montreal Protocol is expected to be amended to reflect the more aggressive US phaseout date. This accelerated date increases the urgency of the Air Force's search for ODC alternatives, especially for mission critical uses for which no alternatives have yet been identified. The search is complicated by the fact that the requirements an alternative must meet are unique to their specific application. This paper will provide an overview of the most important Air Force halon uses and review Air Force strategies for ensuring mission continuity until alternatives can be developed.

  8. Verification of CFD analysis methods for predicting the drag force and thrust power of an underwater disk robot

    NASA Astrophysics Data System (ADS)

    Joung, Tae-Hwan; Choi, Hyeung-Sik; Jung, Sang-Ki; Sammut, Karl; He, Fangpo

    2014-06-01

    This paper examines the suitability of using the Computational Fluid Dynamics (CFD) tools, ANSYSCFX, as an initial analysis tool for predicting the drag and propulsion performance (thrust and torque) of a concept underwater vehicle design. In order to select an appropriate thruster that will achieve the required speed of the Underwater Disk Robot (UDR), the ANSYS-CFX tools were used to predict the drag force of the UDR. Vertical Planar Motion Mechanism (VPMM) test simulations (i.e. pure heaving and pure pitching motion) by CFD motion analysis were carried out with the CFD software. The CFD results reveal the distribution of hydrodynamic values (velocity, pressure, etc.) of the UDR for these motion studies. Finally, CFD bollard pull test simulations were performed and compared with the experimental bollard pull test results conducted in a model basin. The experimental results confirm the suitability of using the ANSYS-CFX tools for predicting the behavior of concept vehicles early on in their design process.

  9. Development of reduced drag concepts for acoustic liners using experimental methods

    NASA Astrophysics Data System (ADS)

    Jasinski, Christopher

    2016-11-01

    Commercial aircraft have used acoustic liners to reduce engine noise for many years, although their drag production has been largely unstudied. The next generation of aircraft may benefit from additional surface area covered by acoustic liner, thus understanding their drag production mechanism is crucial for future designs. An accurate direct aerodynamic drag measurement technique has been developed using a force balance with linear air bearings. Using 3D-printed and conventional liners, low-drag designs are being developed. This paper will investigate the underlying fluid mechanics governing the drag production in acoustic liners and describe new attempts to reduce aerodynamic drag.

  10. Commanding an Air Force Squadron

    DTIC Science & Technology

    1993-12-01

    product that would be of use to many people, and (3) 1 feel most new squadron commanders are not well prepared for command when they get it. The Air...lot of regulations or just quote many senior officers. One purpose of this book is to help a new squadron commander get acquainted with the roles and...COMMAND " Get comfortable with the squadron’s mission before taking command." I asked many former squadron commanders what kind of prepara- tion for

  11. Roughness of Weddell Sea ice and estimates of the air-ice drag coefficient

    NASA Technical Reports Server (NTRS)

    Andreas, Edgar L.; Lange, Manfred A.; Ackley, Stephen F.; Wadhams, Peter

    1993-01-01

    Snow surface, ice surface, and ice underside roughness computed from 47 surface elevation profiles collected during a transect of the Weddell Sea are reported. Roughness spectra for all three surfaces and for both deformed and undeformed ice roll off roughly as k exp -1 when the wavenumber k is between 0.1 and 3 rad/m. The snow surface and underside spectra roll off somewhat faster than k exp -1, and the ice surface spectra roll off somewhat slower than k exp -1. It is argued that the excess spectral intensity at high wavenumbers in the Antarctic ice surface spectra results from the small-scale roughness that the ice sheet had on consolidation. The snow surface spectra are used to compute a roughness scale that parameterizes the air-ice momentum coupling and makes it possible to estimate the neutral stability drag coefficient referenced to a height of 10 m, C sub DN10. Typical C sub DN10 values are 1.1-1.4 x 10 exp -3 over undeformed ice and 1.3-1.8 x 10 exp -3 over deformed ice.

  12. 77 FR 55465 - US Air Force Exclusive Patent License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-10

    ... Department of the Air Force US Air Force Exclusive Patent License AGENCY: Air Force Research Laboratory...) days from the date of publication of this Notice. Written objections should be sent to: Air Force Research Laboratory, Office of the Staff Judge Advocate, AFRL/RIJ, 26 Electronic Parkway, Rome, New...

  13. Numerical Calculation of the Drag Force Acting on a Solid Particle Pushed by a Solid/Liquid Interface

    NASA Technical Reports Server (NTRS)

    Catalina, Adrian V.; Stefanescu, Doru M.; Sen, Subhayu

    2000-01-01

    The distribution of insoluble particles in a metal casting depends primarily on the interaction of the particles with the solid/liquid interface (SLI) during the solidification process. The balance of the forces acting on the particle essentially determines whether a particle will be engulfed or pushed by the SLI. An important component of this force balance is the drag force generated by the particle motion in front of the SLI. Previously developed mathematical models for particle/SLI interaction made use of steady-state solutions of this force provided by the lubrication theory. However, our numerical model based on the SLI tracking approach shows that the steady-state approach is inappropriate to model the interaction process and that at steady-state the theoretical solution underestimates the drag force. It was found that regression analysis of steady-state numerical solutions for cylindrical particles moving normal to a flat SLI gives a relationship of the form: Abstract The distribution of insoluble particles in a metal casting depends primarily on the interaction of the particles with the solid/liquid interface (SLI) during the solidification process. The balance of the forces acting on the particle essentially determines whether a particle will be engulfed or pushed by the SLI. An important component of this force balance is the drag force generated by the particle motion in front of the SLI. Previously developed mathematical models for particle/SLI interaction made use of steady-state solutions of this force provided by the lubrication theory. However, our numerical model based on the SLI tracking approach shows that the steady-state approach is inappropriate to model the interaction process and that at steady-state the theoretical solution underestimates the drag force. It was found that regression analysis of steady-state numerical solutions for cylindrical particles moving normal to a flat SLI gives a relationship of the form: F(sub D, sup num) =sqoare

  14. Improving Energy Security for Air Force Installations

    NASA Astrophysics Data System (ADS)

    Schill, David

    Like civilian infrastructure, Air Force installations are dependent on electrical energy for daily operations. Energy shortages translate to decreased productivity, higher costs, and increased health risks. But for the United States military, energy shortages have the potential to become national security risks. Over ninety-five percent of the electrical energy used by the Air Force is supplied by the domestic grid, which is susceptible to shortages and disruptions. Many Air Force operations require a continuous source of energy, and while the Air Force has historically established redundant supplies of electrical energy, these back-ups are designed for short-term outages and may not provide sufficient supply for a longer, sustained power outage. Furthermore, it is the goal of the Department of Defense to produce or procure 25 percent of its facility energy from renewable sources by fiscal year 2025. In a government budget environment where decision makers are required to provide more capability with less money, it is becoming increasingly important for informed decisions regarding which energy supply options bear the most benefit for an installation. The analysis begins by exploring the field of energy supply options available to an Air Force installation. The supply options are assessed according to their ability to provide continuous and reliable energy, their applicability to unique requirements of Air Force installations, and their costs. Various methods of calculating energy usage by an installation are also addressed. The next step of this research develops a methodology and tool which assesses how an installation responds to various power outage scenarios. Lastly, various energy supply options are applied to the tool, and the results are reported in terms of cost and loss of installation capability. This approach will allow installation commanders and energy managers the ability to evaluate the cost and effectiveness of various energy investment options.

  15. A unified model of drag force for bubble-propelled catalytic micro/nano-motors with different geometries in low Reynolds number flows

    NASA Astrophysics Data System (ADS)

    Li, Longqiu; Wang, Jiyuan; Li, Tianlong; Song, Wenping; Zhang, Guangyu

    2015-03-01

    Motion of catalytic micro/nano-motors with various geometries is mainly determined by the drag force and the propulsion force acting on the motors as they move in low Reynolds number flows. A unified solution of drag force along with drag coefficient for all circular cross-sectional types of micro/nano-motors is derived. The effect of the geometric parameters of a micro/nano-motor, such as the semi-cone angle θ, the ratio ξ of length to larger radius, on the drag coefficient is identified. Results provided in this work are useful for optimizing the design and fabrication of catalytic micro/nano-motors, which can be potentially used in biomedical and environmental engineering.

  16. Air Force Materiel Command Reorganization Analysis

    DTIC Science & Technology

    2012-01-01

    Shelton, John A. Ausink, Chelsea Kaihoi Duran, Robert G. DeFeo, David W. George, Raymond E. Conley, Bernard Fox, Jerry M. Sollinger PROJECT AIR FORCE...Programs, and Analysis Director- ate (AFMC/A8/9); John Steenbock of the AFMC Manpower and Personnel Direc- torate (AFMC/A1); and others at Headquarters...Secretary of the Air Force for Logistics (SAF/IEL); Col John Dolan in the Office of the Legislative Liaison (SAF/LL); Col Jeffrey Morgan in the in

  17. Air Force cryocooler development for spacecraft

    NASA Technical Reports Server (NTRS)

    Haskin, William L.

    1987-01-01

    An overview is given of Air Force sponsored cryocooler development for long duration spacecraft missions. Alternate approaches are being pursued to insure eventual success. The types of closed cycle cryocoolers that are now in advanced development include Vuilleumier, turbo-Brayton, and rotary-reciprocating refrigerators. Linear Stirling coolers with magnetic bearings have also been jointly sponsored by NASA and the Air Force. Technology is also being explored for future coolers using magnetic materials at low temperatures and for refrigerators with sorption compresssors. All of these cryocoolers are presently configured primarily for use with infrared sensor systems, but the designs could be adapted for use with cryogenic fluid storage systems or other applications.

  18. U.S. Air Force Physician Retention

    DTIC Science & Technology

    1990-04-01

    squadron. 28 A way to improve the capabilities and ’mesh’ of the physicians would be to give them some sort of advanced training eerlier in their Air...perceived problems? and 4) How can the perceptions of departing Air Force physicians be changed to improve their sense of job satisfaction and thereby improve ...from the USAF Academy. His first assignment was as a medical student at the Tulane University School of Medicine. After graduating in 1976, he did

  19. Air Force Roles and Missions: A History

    DTIC Science & Technology

    1998-01-01

    Spaatz in 1934 that he thought the Air Corps “should stop graduating bombers and pur- suiters , but graduate all as air force officers.” Referring to an...differences, the two services developed and implemented effective joint doctrine. General McConnell and Army Gen. Harold K. Johnson established joint...Supercarri- ers and B-36 Bombers: Appropriations, Strategy and Politics,” in Harold Stein, Amer- ican Civil-Military Decisions: A Book of Case Studies

  20. Project Air Force Annual Report 2007

    DTIC Science & Technology

    2007-01-01

    U.S. advance toward Baghdad, such as mining roads, destroying bridges, breaching dams , and even setting oil fields afire. Iraqi forces were further...potential drawbacks of the proposed changes for the entire system. Thirtle is a graduate of the Air Force Academy and the Frederick S. Pardee RAND...Frederick S. Pardee RAND Graduate School John D. Graham, Dean RAND Board of Trustees Ann McLaughlin Korologos (Chairman), Former Secretary of Labor Frank C

  1. Looking to the Future of the Air Force Nuclear Enterprise

    DTIC Science & Technology

    2016-09-01

    LOOKING TO THE FUTURE OF THE AIR FORCE NUCLEAR ENTERPRISE Graduate Research Paper Robert C...Evans, Major, USAF AFIT-ENS-MS-16-S-029 DEPARTMENT OF THE AIR FORCE AIR UNIVERSITY AIR FORCE INSTITUTE OF TECHNOLOGY Wright-Patterson Air ...official policy or position of the United States Air Force, Department of Defense, or the United States Government. This material is declared a work of

  2. Mean and fluctuating components of drag and lift forces on an isolated finite-sized particle in turbulence

    NASA Astrophysics Data System (ADS)

    Kim, Jungwoo; Balachandar, S.

    2012-01-01

    We perform fully resolved direct numerical simulations of an isolated particle subjected to free-stream turbulence in order to investigate the effect of turbulence on the drag and lift forces at the level of a single particle, following Bagchi and Balachandar's work (Bagchi and Balachandar in Phys Fluids 15:3496-3513, 2003). The particle Reynolds numbers based on the mean relative particle velocity and the particle diameter are Re = 100, 250 and 350, which covers three different regimes of wake evolution in a uniform flow: steady axisymmetric wake, steady planar symmetric wake, and unsteady planar symmetric vortex shedding. At each particle Reynolds number, the turbulent intensity is 5-10% of the mean relative particle velocity, and the corresponding diameter of the particle is comparable to or larger than the Kolmogorov scale. The simulation results show that standard drag values determined from uniform flow simulations can accurately predict the drag force if the turbulence intensity is sufficiently weak (5% or less compared to the mean relative velocity). However, it is shown that for finite-sized particles, flow non-uniformity, which is usually neglected in the case of the small particles, can play an important role in determining the forces as the relative turbulence intensity becomes large. The influence of flow non-uniformity on drag force could be qualitatively similar to the Faxen correction. In addition, finite-sized particles at sufficient Reynolds number are inherently subjected to stochastic forces arising from their self-induced vortex shedding in addition to lift force arising from the local ambient flow properties (vorticity and strain rate). The effect of rotational and strain rate of the ambient turbulence seen by the particle on the lift force is explored based on the conditional averaging using the generalized representation of the quasi-steady force proposed by Bagchi and Balachandar (J Fluid Mech 481:105-148, 2003). From the present study, it

  3. Williams Air Force Base Air Quality Monitoring Study,

    DTIC Science & Technology

    1980-07-01

    During monitoring operations conducted from five ground stations at Williams Air Force Base (WAFB) near Phoenix, Arizona, air quallity data were collected... chemical spraying, which could explain the higher levels of THC. Pollution roses for CO and THC were constructed using April 17 - June 18 data, and the...mixing depth). They also provided information on the vertical mixing properties of the atmosphere and (as input for model calculations) insight into

  4. Casimir frictional drag force between a SiO2 tip and a graphene-covered SiO2 substrate

    NASA Astrophysics Data System (ADS)

    Volokitin, A. I.

    2016-12-01

    The possibility of the mechanical detection of the Casimir friction using noncontact force microscope is discussed. On a SiO2 tip situated above a graphene-covered SiO2 substrate will act the frictional drag force mediated by a fluctuating electromagnetic field produced by a current in the graphene sheet. This friction force will produce the bending of the cantilever, which can be measured by state-of-art noncontact force microscope. Both the thermal and quantum contributions to the Casimir frictional drag force can be studied using this experimental setup. This result paves the way for the mechanical detection of the Casimir friction and for the application of the frictional drag effect in micro- and nanoelectromechanical devices (MEMS and NEMS).

  5. Comparison of Gravity Wave Temperature Variances from Ray-Based Spectral Parameterization of Convective Gravity Wave Drag with AIRS Observations

    NASA Technical Reports Server (NTRS)

    Choi, Hyun-Joo; Chun, Hye-Yeong; Gong, Jie; Wu, Dong L.

    2012-01-01

    The realism of ray-based spectral parameterization of convective gravity wave drag, which considers the updated moving speed of the convective source and multiple wave propagation directions, is tested against the Atmospheric Infrared Sounder (AIRS) onboard the Aqua satellite. Offline parameterization calculations are performed using the global reanalysis data for January and July 2005, and gravity wave temperature variances (GWTVs) are calculated at z = 2.5 hPa (unfiltered GWTV). AIRS-filtered GWTV, which is directly compared with AIRS, is calculated by applying the AIRS visibility function to the unfiltered GWTV. A comparison between the parameterization calculations and AIRS observations shows that the spatial distribution of the AIRS-filtered GWTV agrees well with that of the AIRS GWTV. However, the magnitude of the AIRS-filtered GWTV is smaller than that of the AIRS GWTV. When an additional cloud top gravity wave momentum flux spectrum with longer horizontal wavelength components that were obtained from the mesoscale simulations is included in the parameterization, both the magnitude and spatial distribution of the AIRS-filtered GWTVs from the parameterization are in good agreement with those of the AIRS GWTVs. The AIRS GWTV can be reproduced reasonably well by the parameterization not only with multiple wave propagation directions but also with two wave propagation directions of 45 degrees (northeast-southwest) and 135 degrees (northwest-southeast), which are optimally chosen for computational efficiency.

  6. United States Air Force Annual Financial Statements

    DTIC Science & Technology

    2002-01-01

    gains and losses NRV = Net Realizable Value O = Other Inventory, Gross Value Revaluation Allowance Inventory, Net 2002 2001 United States Air Force...losses NRV = Net Realizable Value O = Other For the most part, DMAG is using the consumption method of accounting for OM&S, since OM&S is defined in the

  7. Air Force Convair F-102 at Wallops

    NASA Technical Reports Server (NTRS)

    1954-01-01

    Two models of the Air Force's Convair F-102 sit poised for launch from Langley's Wallops Island facility. The coke bottle shape of the model on the bottom follows the area rule. Photograph published in Winds of Change, 75th Anniversary NASA publication, by James Schultz (page 60).

  8. Air Force Convair F-102 at Wallops

    NASA Technical Reports Server (NTRS)

    1953-01-01

    Two models of the Air Force's Convair F-102 sit poised for launch from Langley's Wallops Island facility. The Coke Bottle shape of the model on the bottom follows the area rule. Photograph published in Winds of Change, 75th Anniversary NASA publication, (page 60), by James Schultz.

  9. Improving Energy Security for Air Force Installations

    DTIC Science & Technology

    2015-09-01

    provide more capability with less money, it is becoming increasingly important for informed decisions regarding which energy supply options bear the...to be economically advantageous to the government. As mentioned in Chapter Two, the Air Force must bear in mind that it is not in the business of

  10. Geothermal Resource Verification for Air Force Bases,

    DTIC Science & Technology

    1981-06-01

    Geothermal Resources ............................ 12 Overview ........................................................ 12 Hydrothermal Convection Systems...exploration techniques. In some regions where thick sedimentary occur usable hydrothermal resources may be encountered in deep v.elIE where there is no...effort to locate a low to moderate temperature hydrothermal regime suitable for space heating at Hill Air Force Base, Utah, was recently completed and

  11. Considering the Audience: Air Force Recruiting Presentations

    ERIC Educational Resources Information Center

    Malone, Darek L.

    2012-01-01

    Each Air Force recruiter is formally trained in public speaking and the art of salesmanship or persuasion. These recruiters communicate to thousands of high school students each year through presentations in classrooms, auditoriums and other venues as part of their assigned duties. Persuasive presentations are public speaking events specifically…

  12. Air Force construction automation/robotics

    NASA Technical Reports Server (NTRS)

    Nease, AL; Dusseault, Christopher

    1994-01-01

    The Air Force has several unique requirements that are being met through the development of construction robotic technology. The missions associated with these requirements place construction/repair equipment operators in potentially harmful situations. Additionally, force reductions require that human resources be leveraged to the maximum extent possible and that more stringent construction repair requirements push for increased automation. To solve these problems, the U.S. Air Force is undertaking a research and development effort at Tyndall AFB, FL to develop robotic teleoperation, telerobotics, robotic vehicle communications, automated damage assessment, vehicle navigation, mission/vehicle task control architecture, and associated computing environment. The ultimate goal is the fielding of robotic repair capability operating at the level of supervised autonomy. The authors of this paper will discuss current and planned efforts in construction/repair, explosive ordnance disposal, hazardous waste cleanup, fire fighting, and space construction.

  13. The Italian Air Force rehabilitation programme for air-sickness.

    PubMed

    Lucertini, M; Lugli, V

    2004-08-01

    Motion Sickness, or kinetosis, is a complex clinical syndrome usually classified according to the environmental situation evoking the symptoms. Among the various forms of motion sickness, air sickness has a significant impact on aircrew readiness and is often a cause for the grounding of aircrew. Unfortunately, standards for clinical testing to accurately predict the sensitivity of each individual to air-sickness are currently lacking. Furthermore, pharmacological prevention is contraindicated for aircrews, whose cognitive tasks involve a high level of vigilance. Therefore, a number of Air Forces have developed their own rehabilitation programmes to counteract air-sickness effects on flight personnel. These programmes may differ in several aspects, such as their duration, instruments used, costs and the technical characteristics of the rehabilitation team. However, reports in the specialized literature, refer to high rates of success, despite the above-mentioned differences. In the autumn of 2000, the Italian Air Force (ITAF) also began its own rehabilitation programme for air-sickness desensitisation. The programme was developed at the Aerospace Medicine Department of the ITAF Flight Test Centre, at the Pratica di Mare Air Force Base, Italy. The ITAF rehabilitation course lasts two weeks, and candidates are first classified according to their clinical history and to their reaction to the Coriolis Stress Test. Thereafter, subjects undergo a personalized desensitisation programme, involving increasingly more intense nauseogenic stimuli by means of various devices. At the same time, a psychological approach, based on autogenous training and cognitive-behavioural therapy, is adopted. The present report refers to data from 17 subjects treated from January 2001. The current clinical outcome is extremely encouraging, with a success rate of 88%. Nevertheless, several aspects of motion sickness rehabilitation are still under investigation, and further research programmes

  14. Method to estimate drag coefficient at the air/ice interface over drifting open pack ice from remotely sensed data

    NASA Technical Reports Server (NTRS)

    Feldman, U.

    1984-01-01

    A knowledge in near real time, of the surface drag coefficient for drifting pack ice is vital for predicting its motions. And since this is not routinely available from measurements it must be replaced by estimates. Hence, a method for estimating this variable, as well as the drag coefficient at the water/ice interface and the ice thickness, for drifting open pack ice was developed. These estimates were derived from three-day sequences of LANDSAT-1 MSS images and surface weather charts and from the observed minima and maxima of these variables. The method was tested with four data sets in the southeastern Beaufort sea. Acceptable results were obtained for three data sets. Routine application of the method depends on the availability of data from an all-weather air or spaceborne remote sensing system, producing images with high geometric fidelity and high resolution.

  15. Russian Tu-144LL SST Flying Laboratory Landing with Drag Chutes at Zhukovsky Air Development Center

    NASA Technical Reports Server (NTRS)

    1997-01-01

    The modified Tupolev Tu-144 supersonic flying laboratory touches down and deploys a trio of drag chutes following a test flight at the Zhukovsky Air Development Center near Moscow, Russia, in July 1997. NASA teamed with American and Russian aerospace industries for an extended period in a joint international research program featuring the Russian-built Tu-144LL supersonic aircraft. The object of the program was to develop technologies for a proposed future second-generation supersonic airliner to be developed in the 21st Century. The aircraft's initial flight phase began in June 1996 and concluded in February 1998 after 19 research flights. A shorter follow-on program involving seven flights began in September 1998 and concluded in April 1999. All flights were conducted in Russia from Tupolev's facility at the Zhukovsky Air Development Center near Moscow. The centerpiece of the research program was the Tu 144LL, a first-generation Russian supersonic jetliner that was modified by its developer/builder, Tupolev ANTK (aviatsionnyy nauchno-tekhnicheskiy kompleks-roughly, aviation technical complex), into a flying laboratory for supersonic research. Using the Tu-144LL to conduct flight research experiments, researchers compared full-scale supersonic aircraft flight data with results from models in wind tunnels, computer-aided techniques, and other flight tests. The experiments provided unique aerodynamic, structures, acoustics, and operating environment data on supersonic passenger aircraft. Data collected from the research program was being used to develop the technology base for a proposed future American-built supersonic jetliner. Although actual development of such an advanced supersonic transport (SST) is currently on hold, commercial aviation experts estimate that a market for up to 500 such aircraft could develop by the third decade of the 21st Century. The Tu-144LL used in the NASA-sponsored research program was a 'D' model with different engines than were used

  16. Flow through an Array of Superhydrophopic Pillars: The Role of the Air-Water Interface Shape on Drag Reduction

    NASA Astrophysics Data System (ADS)

    Kim, Jeong-Hyun; Rothstein, Jonathan

    2016-11-01

    In this study, measurements of the pressure drop and the velocity fields associated with the flow of water through a regular array of superhydrophobic pillars were systematically performed to investigate the role of the air-water interface shape on drag reduction. A microfluidic channel was created with circular and superhydrophobic apple-core-shaped pillars bridging across the entire channel. The apple-core-shaped pillars were designed to trap an air pocket along the side of the pillars. The shape of the interface was systematically modified from concave to convex by changing the static pressure within the microchannel. For superhydrophobic pillars having a circular cross section, D /D0 = 1.0, a drag reduction of 7% and a slip velocity of 20% the average channel velocity along the air-water interface were measured. At large static pressures, the interface was driven into the pillars resulting in a decrease in the effective size of the pillars, an increase in the effective spacing between pillars and a pressure drop reduction of as much as 18% when the interface was compressed to D /D0 = 0.8. At low static pressures, the pressure drop increased significantly even as the slip velocity increased as the expanding air-water interface constricted flow through the array of pillars. This research was supported by the National Science Foundation under Grant CBET-1334962.

  17. The drag of airplane radiators with special reference to air heating : comparison of theory and experiment

    NASA Technical Reports Server (NTRS)

    Gothert, B

    1939-01-01

    This report contains a survey of past radiator research. This report also is intended as a systematic comparison of theoretical and experimental radiator drag, with the object of ascertaining the most important loss sources and their interaction in different cases of installation, and to separate the radiator systems which are amenable to calculation, both as regards axial flow and drag. The sources of loss due to the diffuser are to be looked into closely as in many cases they can be of preeminent magnitude and their customary appraisal, according to Fliegner's formula, does not meet actual conditions. Besides, generally applicable equations and charts are developed for the rapid determination of the heating effect of radiators as regards flow and drag, and then checked by routine tests on hot radiators.

  18. Reinvigorating the Air Force Nuclear Enterprise

    DTIC Science & Technology

    2008-10-24

    Reinvigorating the Air Force Nuclear Enterprise, is the product of these investigations and internal assessments. The reports converged on six recurring...LCOM) determinant products to determine if dual-tasked and PNAF workloads are adequately reflected in each product . (AFRIT-09; BRR-33; CANS-05... Product Lifecycle Management (PLM) capabilities to support ICBM engineering and sustainment. PLM will become the automated tool for Electronic

  19. Air Force and Diversity: The Awkward Embrace

    DTIC Science & Technology

    2013-02-14

    implications for civil-military relations, with respect to political leadership and the broader civilian society. As former House Armed Services...there has been tension between military and civilian leadership. Increasing divergence in the attitudes of the Air Force and political leadership...female sailors (officers and enlisted). Eighty-two percent of survey participants who reached a retention decision while in the program elected to

  20. Advanced Robotics for Air Force Operations

    DTIC Science & Technology

    1989-06-01

    fertilize devel- tions. At the request of the Air Force, opment of multiple applications, espe- the committee deemphasized assessment cially outside the...and requiring at a time. Because of the health hazard only adaptation from manufacturing from sanding dust and polyurethane robots to maintenance and...for several years and have generally ( EPA ) standards, which frequently performed acceptably. However, the change and usually become more restric

  1. 50TH Project Air Force, 1946 - 1996.

    DTIC Science & Technology

    1996-01-01

    Baran’s work on the concept of "distributed communications"— now known as packet switching . Developed in the mid- 1960s in response to an Air Force...provided the natural com- 40 plement to the equally pathbreaking work under way at RAND on U.S. strategy for the nuclear era. They made possible...effects of arms control on nuclear power plants in California. Analysis for Negotiation Starting in the early 1960s with the Underground Test Ban

  2. Computer Applications for Air Force Construction Management.

    DTIC Science & Technology

    1979-08-01

    The addition of a motor in 1920, resulted in the first electrical calculators. Charles Babbage is considered the "father" of the computer. In 1883, he...management applications. Watt (1795), Owen (early 1800’s), and Babbage (1832), made the first real- istic management applications in the field of production...network scheduling by the contractor "if" it is felt that the government can benefit by its use. 2 Captain Charles D. Sprick, Resident Air Force

  3. Air Force Third Party Financing Management Guide.

    DTIC Science & Technology

    1984-05-01

    ritic: ’ lf(trical rcquiremerts and the potential value of increased electrica ! hOup capaility. All of the above suggests strong consideration of full...system. In the case of internal labor disturbances, management is usually capable of operating the essential utility services as reded . Other measures...relating to "third party" supply of thermal and/or electrica ’ energy to U.S. Air Force base installations in the United States. Incorpora- tion of

  4. Task analysis of Air Force pharmacy practice.

    PubMed

    Bartholomew, A; Sawyer, W T; Coats, L

    1995-01-15

    The frequency with which United States Air Force pharmacists perform specific professional tasks and the pharmacists' views as to the importance of those tasks were studied. A questionnaire was prepared that asked recipients to rate each of 36 tasks selected as representing the spectrum of practice activities. There were four categories of tasks: managerial tasks, dispensing tasks, drug information tasks, and patient care tasks. Recipients rated the tasks with respect to frequency of performance and importance on separate 6-point scales. The questionnaire was mailed in May 1991 to the 225 pharmacists then serving in the Air Force worldwide. Of the 225 questionnaires, 150 usable questionnaires were returned (response rate, 67%). All the tasks in the survey were performed by at least one Air Force pharmacy officer, although the frequency of task performance varied. In particular, the frequency of many patient care tasks was low. All the tasks were perceived to have some importance, but drug information tasks were rated as being significantly more important than tasks in the other categories; patient care tasks were rated lowest in importance. The results varied with the respondents' demographic characteristics. Pharmacy officers with more years of service, more senior positions, higher rank, or an advanced degree in a field other than pharmacy tended to give responses that diverged from those of the population. A 1991 survey showed an awareness among Air Force pharmacists of the need to orient practice around patient care; however, they were not spending substantial time on patient care and tended to view it as less important than more traditional pharmacy tasks.

  5. Air Force Reading Abilities Test: Utilization Assessment.

    DTIC Science & Technology

    1984-03-01

    COMPLETING FORM 1. REPORT NUMBER 2 . GOVTAC NO Y3C NT. CATALOG NUMBER AFHRL-SR-83-23 Ik6. 4. TITLE (awd Su,$9k) S. TYPE OF REPORT & PERIOD COVERED AIR FORCE...the R&DI AFHRL. TR-78.82, Predichon of Reading Grade Li.s of Seim. AApdwo from Armed Serice. Vocaionaj Ap ude Batery (ASVAB); AFHRL.TR-80-11, Reading

  6. China’s Air Force Modernization

    DTIC Science & Technology

    2007-01-01

    capable, multirole fighter strongly influenced by the Israeli Lavi , which was influenced by the F–16.7 The J–10 is equipped with aerial refu- eling...scenario would involve greater attention to potential threats from Japan and India. This scenario might also include preparation for dangers stemming from...be a key indicator. In theory , the defense reorganization of 1998 that established the General Armaments Depart- ment should give air force

  7. Air Force and DOD solar power requirements

    NASA Technical Reports Server (NTRS)

    Wise, Joseph F.

    1987-01-01

    It is noted that future power requirements are increasing for some expanded and new missions within the Air Force and Department of Defense. New requirements are needed in terms of lifetime, survivability, power level and performance. The photovoltaic arrays have a demonstrated record of reliable performance, life, affordable cost, and utility. It is argued that there is a need to push for the research and development resources needed to develop the technology base for these future power system needs.

  8. 4. BUILDING 8767, INTERIOR. Looking west. Edwards Air Force ...

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

    4. BUILDING 8767, INTERIOR. Looking west. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Observation Bunkers for Test Stand 1-A, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

  9. SOUTHEAST AND NORTHEAST SIDES. Looking west Edwards Air Force ...

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

    SOUTHEAST AND NORTHEAST SIDES. Looking west - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Fuel & Water Tank, Test Area 1-115, northwest end of Saturn Boulevard, Boron, Kern County, CA

  10. DETAIL, CONTROL BOOTH, RP1 TANK FARM Edwards Air Force ...

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

    DETAIL, CONTROL BOOTH, RP1 TANK FARM - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Combined Fuel Storage Tank Farm, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

  11. Drag and Cooling with Various Forms of Cowling for a "Whirlwind" Radial Air-cooled Engine II

    NASA Technical Reports Server (NTRS)

    Weick, Fred E

    1930-01-01

    This report gives the results of the second portion of an investigation in the twenty-foot Propeller Research Tunnel of the National Advisory Committee for Aeronautics, on the cowling and cooling of a "Whirlwind" J-5 radial air-cooled engine. The first portion pertains to tests with a cabin fuselage. This report covers tests with several forms of cowling, including conventional types, individual fairings behind the cylinders, individual hoods over the over the cylinders, and the new N. A. C. A. complete cowling, all on an open cockpit fuselage. Drag tests were also made with a conventional engine nacelle, and with a nacelle having the new complete cowling. In the second part of the investigation the results found in the first part were substantiated. It was also found that the reduction in drag with the complete cowling over that with conventional cowling is greater with the smaller bodies than with the cabin fuselage; in fact, the gain in the case of the completely cowled nacelle is over twice that with the cabin fuselage. The individual fairings and hoods did not prove effective in reducing the drag. The results of flight tests on AT-5A airplane has been analyzed and found to agree very well with the results of the wind tunnel tests. (author)

  12. Nanoscience and Technology at the Air Force Research Laboratory (AFRL)

    DTIC Science & Technology

    2005-05-01

    AIR FORCE RESEARCH LABORATORY ( AFRL ) Dr. Richard A. Vaia Dr. Daniel Miracle Dr. Thomas Cruse Air Force Research ...Technology At The Air Force Research Laboratory ( AFRL ) 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT...98) Prescribed by ANSI Std Z39-18 AFRL NST Overview 2 AIR FORCE RESEARCH LABORATORY VISION We defend

  13. Nanoscience and Technology at the Air Force Research Laboratory (AFRL)

    DTIC Science & Technology

    2005-02-01

    AIR FORCE RESEARCH LABORATORY ( AFRL ) Dr. Richard A. Vaia Dr. Daniel Miracle Dr. Thomas Cruse Air Force Research ...Technology At The Air Force Research Laboratory ( AFRL ) 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT...98) Prescribed by ANSI Std Z39-18 AFRL NST Overview 2 AIR FORCE RESEARCH LABORATORY VISION We defend

  14. Theoretical and numerical study of air layer drag reduction in two-phase Couette-Poiseuille flow

    NASA Astrophysics Data System (ADS)

    Kim, Dokyun; Moin, Parviz

    2008-11-01

    The objective of the present study is to predict and understand the air layer drag reduction (ALDR) phenomenon. Recent experiments (Elbing et al. 2008) have shown net drag reductions if air is injected beyond a critical rate next to the wall. The analysis is performed on a two-phase Couette-Poiseuille flow configuration, which mimics the far downstream region of boundary layer flow on a flat plate. Both theoretical and numerical approaches are employed to investigate the stability and mechanisms of ALDR. The linear stability of air-liquid interface is investigated by solving the Orr-Sommerfeld equations. From the stability analysis, the stability of the interface is reduced as the liquid free-stream velocity, Froude number and velocity gradients at the interface are increased, while the stability is enhanced as the gas flow rate and surface tension are increased. The Critical gas flow rates from stability theory are compared with experimental results, showing good agreement. Direct numerical simulations with a Refiend Level Set Grid technique has been performed to investigate the evolution of the interface, the turbulence interaction and nonlinear mechanisms of ALDR. It is observed that the Weber number has significant impact on the characteristics of the interface development.

  15. A radionuclide counting technique for measuring wind velocity. [drag force anemometers

    NASA Technical Reports Server (NTRS)

    Singh, J. J.; Khandelwal, G. S.; Mall, G. H.

    1981-01-01

    A technique for measuring wind velocities of meteorological interest is described. It is based on inverse-square-law variation of the counting rates as the radioactive source-to-counter distance is changed by wind drag on the source ball. Results of a feasibility study using a weak bismuth 207 radiation source and three Geiger-Muller radiation counters are reported. The use of the technique is not restricted to Martian or Mars-like environments. A description of the apparatus, typical results, and frequency response characteristics are included. A discussion of a double-pendulum arrangement is presented. Measurements reported herein indicate that the proposed technique may be suitable for measuring wind speeds up to 100 m/sec, which are either steady or whose rates of fluctuation are less than 1 kHz.

  16. 32 CFR 644.516 - Clearance of Air Force lands.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 4 2012-07-01 2011-07-01 true Clearance of Air Force lands. 644.516 Section 644... Excess Land and Improvements § 644.516 Clearance of Air Force lands. The Chief of Engineers has no responsibility for inspecting or clearing excess Air Force land of explosives or chemical/biological...

  17. 32 CFR 631.15 - Air Force policy.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 4 2012-07-01 2011-07-01 true Air Force policy. 631.15 Section 631.15 National...-Installation Operations (Military Patrols and Investigative Activities) and Policy § 631.15 Air Force policy. (a) Airmen, military and/or Department of the Air Force Civilian (DAFC) police performing...

  18. 32 CFR 842.11 - Air Force claims organization.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 6 2011-07-01 2011-07-01 false Air Force claims organization. 842.11 Section 842.11 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE CLAIMS AND LITIGATION ADMINISTRATIVE CLAIMS Functions and Responsibilities § 842.11 Air Force claims organization....

  19. 32 CFR 631.15 - Air Force policy.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 4 2011-07-01 2011-07-01 false Air Force policy. 631.15 Section 631.15 National...-Installation Operations (Military Patrols and Investigative Activities) and Policy § 631.15 Air Force policy. (a) Airmen, military and/or Department of the Air Force Civilian (DAFC) police performing...

  20. 10. "TEST STAND 15, AIR FORCE FLIGHT TEST CENTER." ca. ...

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

    10. "TEST STAND 1-5, AIR FORCE FLIGHT TEST CENTER." ca. 1958. Test Area 1-115. Original is a color print, showing Test Stand 1-5 from below, also showing the superstructure of TS1-4 at left. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Leuhman Ridge near Highways 58 & 395, Boron, Kern County, CA

  1. 32 CFR 631.15 - Air Force policy.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Air Force policy. 631.15 Section 631.15 National...-Installation Operations (Military Patrols and Investigative Activities) and Policy § 631.15 Air Force policy. (a) Airmen, military and/or Department of the Air Force Civilian (DAFC) police performing...

  2. 32 CFR 842.11 - Air Force claims organization.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 6 2013-07-01 2013-07-01 false Air Force claims organization. 842.11 Section 842.11 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE CLAIMS AND LITIGATION ADMINISTRATIVE CLAIMS Functions and Responsibilities § 842.11 Air Force claims organization....

  3. 32 CFR 842.11 - Air Force claims organization.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 6 2014-07-01 2014-07-01 false Air Force claims organization. 842.11 Section 842.11 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE CLAIMS AND LITIGATION ADMINISTRATIVE CLAIMS Functions and Responsibilities § 842.11 Air Force claims organization....

  4. 32 CFR 644.516 - Clearance of Air Force lands.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 4 2014-07-01 2013-07-01 true Clearance of Air Force lands. 644.516 Section 644... Excess Land and Improvements § 644.516 Clearance of Air Force lands. The Chief of Engineers has no responsibility for inspecting or clearing excess Air Force land of explosives or chemical/biological...

  5. 32 CFR 842.11 - Air Force claims organization.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 6 2012-07-01 2012-07-01 false Air Force claims organization. 842.11 Section 842.11 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE CLAIMS AND LITIGATION ADMINISTRATIVE CLAIMS Functions and Responsibilities § 842.11 Air Force claims organization....

  6. 32 CFR 631.15 - Air Force policy.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 4 2013-07-01 2013-07-01 false Air Force policy. 631.15 Section 631.15 National...-Installation Operations (Military Patrols and Investigative Activities) and Policy § 631.15 Air Force policy. (a) Airmen, military and/or Department of the Air Force Civilian (DAFC) police performing...

  7. 32 CFR 644.516 - Clearance of Air Force lands.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 4 2013-07-01 2013-07-01 false Clearance of Air Force lands. 644.516 Section... Excess Land and Improvements § 644.516 Clearance of Air Force lands. The Chief of Engineers has no responsibility for inspecting or clearing excess Air Force land of explosives or chemical/biological...

  8. 32 CFR 644.516 - Clearance of Air Force lands.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 4 2011-07-01 2011-07-01 false Clearance of Air Force lands. 644.516 Section... Excess Land and Improvements § 644.516 Clearance of Air Force lands. The Chief of Engineers has no responsibility for inspecting or clearing excess Air Force land of explosives or chemical/biological...

  9. 32 CFR 842.11 - Air Force claims organization.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 6 2010-07-01 2010-07-01 false Air Force claims organization. 842.11 Section 842.11 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE CLAIMS AND LITIGATION ADMINISTRATIVE CLAIMS Functions and Responsibilities § 842.11 Air Force claims organization....

  10. 32 CFR 631.15 - Air Force policy.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 4 2014-07-01 2013-07-01 true Air Force policy. 631.15 Section 631.15 National...-Installation Operations (Military Patrols and Investigative Activities) and Policy § 631.15 Air Force policy. (a) Airmen, military and/or Department of the Air Force Civilian (DAFC) police performing...

  11. The Newest Air Force Core Function: Building Partnerships

    DTIC Science & Technology

    2011-02-17

    Iraq Training and Advisory Mission – Air Force ( ITAM – AF) This paper investigated a DOTMLPF analysis to determine potential BP capability gaps...Iraq Training and Advisory Mission – Air Force ( ITAM -AF), Combined Air Power Transition Force (CAPTF)-Afghanistan, or even Multi-National Security

  12. 32 CFR 644.516 - Clearance of Air Force lands.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Clearance of Air Force lands. 644.516 Section 644... Excess Land and Improvements § 644.516 Clearance of Air Force lands. The Chief of Engineers has no responsibility for inspecting or clearing excess Air Force land of explosives or chemical/biological...

  13. Environmental Assessment: Proposed Consolidated Warehouse, Hill Air Force Base, Utah

    DTIC Science & Technology

    2011-02-01

    Utah FA8201-09-D-0006 Klein, Randal Johnson, Sam Streamline Consulting, LLC 1713 N. Sweetwater Lane Farmington, Utah 84025 Hill Air Force Base 7274... Air Force Base (AFB) proposes to adequate warehouse facilities in which to store equipment for worldwide United States Air Force (USAF) operations

  14. Drag-free satellite control

    NASA Technical Reports Server (NTRS)

    Debra, Daniel B.

    1989-01-01

    A drag-free satellite cancels the effect of external disturbances. Although the forces may be small, a satellite is disturbed by residual air drag, radiation pressure, micrometeorite impact, and other small forces that act on its surface disturbing its orbit, which is principally determined by the gravity field. In some missions, these small perturbations that make the satellite deviate from its purely gravitational orbit are limiting. An internal unsupported proof mass is shielded by the satellite from the external disturbances. The position of the shield (or the main part of the satellite) is measured with respect to the internal proof mass, and this information is used to actuate a propulsion system which moves the satellite to follow the proof mass. A drag-free control system is illustrated. Since the proof mass is shielded it follows a purely gravitational orbit - as does the satellite following it - hence the name drag-free satellite. The idea was conceived by Lange (1964) and has been applied to many mission studies since. In some cases, it is not necessary to cancel the disturbances, only to measure them so they may be taken into account. In such cases, an accelerometer may be a more suitable solution (for example, using the ONERA Cactus or the Bell Aerosystems MESA).

  15. Air Force construction automation/robotics

    NASA Technical Reports Server (NTRS)

    Nease, A. D.; Alexander, E. F.

    1993-01-01

    The Air Force has several missions which generate unique requirements that are being met through the development of construction robotic technology. One especially important mission will be the conduct of Department of Defense (DOD) space activities. Space operations and other missions place construction/repair equipment operators in dangerous environments and potentially harmful situations. Additionally, force reductions require that human resources be leveraged to the maximum extent possible, and more stringent construction repair requirements push for increased automation. To solve these problems, the U.S. Air Force is undertaking a research and development effort at Tyndall AFB, FL, to develop robotic construction/repair equipment. This development effort involves the following technologies: teleoperation, telerobotics, construction operations (excavation, grading, leveling, tool change), robotic vehicle communications, vehicle navigation, mission/vehicle task control architecture, and associated computing environment. The ultimate goal is the fielding of a robotic repair capability operating at the level of supervised autonomy. This paper will discuss current and planned efforts in space construction/repair, explosive ordnance disposal, hazardous waste cleanup, and fire fighting.

  16. Air Force Logistics: A Historical Perspective (1940 to 1983)

    DTIC Science & Technology

    1983-09-01

    War College, Maxwell AFB AL, 1969. (4) Smithies , Arthur. PPBS, Suboptimization, and Decentralization. Rand Report No. RM-6178-PR, The Rand Corporation...of Maintenance Performance," Air Force Journal of Logistics, Fall 81, pp. 20-24. (15) King, Oliver E. "Why Not Specialization in the Air Corps," Air... Oliver P. President, Air Industry Association. "Mobiliza- tion Planning and Logistical Preparation of the Air Forces for World War II." Address to Air War

  17. Drag and Propulsive Characteristics of Air-Cooled Engine-Nacelle Installations for Large Airplane

    NASA Technical Reports Server (NTRS)

    Silverstein, Abe; Wilson, Herbert A , Jr

    1942-01-01

    An investigation was conducted in the NACA full-scale wind tunnel to determine the drag and the propulsive efficiency of nacelle-propeller arrangements for a large range of nacelle sizes. In contrast with usual tests with a single nacelle, these tests were conducted with nacelle-propeller installations on a large model of a four-engine airplane. Data are presented on the first part of the investigation, covering seven nacelle arrangements with nacelle diameters from 0.53 to 1.5 times the wing thickness. These ratios are similar to those occurring on airplanes weighing from about 20 to 100 tons. The results show the drag, the propulsive efficiency, and the over-all efficiency of the various nacelle arrangements as functions of the nacelle size, the propeller position, and the airplane lift coefficient. The effect of the nacelles on the aerodynamic characteristics of the model is shown for both propeller-removed and propeller-operating conditions.

  18. Waste Minimization Program. Air Force Plant 6.

    DTIC Science & Technology

    1986-02-01

    636 WASTE RNIZTXOM P76RW AIR F T L INC / DOYNTON SEACH FL It Of ISD/o fl" FOM3-4--142-SCS1 LSIFIEEEFIGh24/ . son hhshmhhhEEI II 1202 L6 0 2O s 4 111...2-9 3.0 Waste Minimization Program, AFP 6 3-1 3.1 Machine Coolant Waste 3-1 3.2 Engine Oil and Hydraulic Fluid Waste 3-12 3.3 Paint Sludge 3-14 3.4...Beach, Florida, for the purpose of aiding in minimizing waste generation from Air Force industrial facilities. It is not an endorsement of any product

  19. The Air Force concentrating photovoltaic array program

    NASA Technical Reports Server (NTRS)

    Geis, Jack W.

    1987-01-01

    A summary is given of Air Force solar concentrator projects beginning with the Rockwell International study program in 1977. The Satellite Materials Hardening Programs (SMATH) explored and developed techniques for hardening planar solar cell array power systems to the combined nuclear and laser radiation threat environments. A portion of program dollars was devoted to developing a preliminary design for a hardened solar concentrator. The results of the Survivable Concentrating Photovoltaic Array (SCOPA) program, and the design, fabrication and flight qualification of a hardened concentrator panel are discussed.

  20. 50 Years Air Force Issues Book 1997

    DTIC Science & Technology

    1997-01-01

    in 1996 51 Satelltea on Orbit JointU Guard U* , r I Nworthern Counter Drug Ops ’c U ~Southern Watc * FY96/97 Humanitarian Aid Bosnia-Herzegovina...MLV-D MLV-A HLV -L HLV -G McDonnell Douglas EELV proposal Lockheed Martin EELV proposal launch costs by 25 to 50 percent as a result. In Together, these... HLV -L HLV -G vehicles. - ! Program Description and Key Points The Air Force, as the DoD’s executive agent for space launch, is charged with executing

  1. The Next-Generation Expeditionary Air Force

    DTIC Science & Technology

    2012-02-01

    Journal, which was selected as the journal’s second-best article for 2010 and was published in the Spanish, Portuguese , and Chinese editions of ASPJ...literature review and personal interviews provided the core research methodology for this study. A literature review identi- fied current AEF policy and...comments: Thank you for your assistance. C u t al o n g d o tt ed li n e Place Stamp Here AFRI/DE Dean, Air Force Research Institute 155 N

  2. Fixing the Mobility Air Forces New Way

    DTIC Science & Technology

    2013-03-01

    the ARC normally has a 1:5 Mobilization to Dwell ( M2D ). In order to understand what this new way changed and why it is important, it is necessary to... M2D . In measurements of AC and ARC workloads, a trend of decreasing ratios means the aircrew workload is increasing. When the AC ratio decreases...to properly convert the ARC 1:5 M2D to an accurate D2D ratio in order to use a common measure of workloads.15 According to the Air Force Reserve

  3. Keesler Air Force Base team tours Stennis

    NASA Technical Reports Server (NTRS)

    2009-01-01

    Stennis Space Center Deputy Director Patrick Scheuermann (seated, center) welcomed members of the Keesler Air Force Base management team from Biloxi during a Nov. 4 tour of the rocket engine test facility. During the visit, Keesler team members toured several areas, including the A-3 Test Stand construction site and the Pratt & Whitney Rocketdyne engine assembly facility. Management team members visiting Stennis included Brig. Gen. Ian R. Dickinson (seated, right), commander of the Keesler base, and Col. Christopher Valle (seated, left), vice commander of the base.

  4. Air Force Environmental Management System Overview

    DTIC Science & Technology

    2011-05-01

    Key to ~:ning the environn ental portion of lbiJ vi ’lion i3 copcrot:oll41iling cnvirorunentlll monagcmcnt Air Force-wide. Operotiooa:tzl.o...approach for addressing environmental aspects of internal agency operations and activities”  For the AF, “appropriate facilities” equates to “major...y y y Authority 7. Communication y y y 16. Internal EMS Audit y y y 8. Documentation & y y y 17. Management Review y y y Doc Control 9

  5. Introduction to the United States Air Force

    DTIC Science & Technology

    2001-01-01

    to major and sent home to instruct others in the art of aerial superior- ity, with assignment to Foster Field, Texas. In September 1944 he returned to...operational art ” and how airpower could be used to complement the operations of land and sea forces was outstanding, and he was considered by many to be the...awarded the Legion of Merit while assigned at Naha Air Base, Okinawa. The award, an uncommon deco - ration for an enlisted man, was earned for having

  6. Invariance of Hypersonic Normal Force Coefficients with Reynolds Number and Determination of Inviscid Wave Drag from Laminar Experimental Results

    NASA Technical Reports Server (NTRS)

    Hawkins, Richard; Penland, Jim A.

    1997-01-01

    Observations have been made and reported that the experimental normal force coefficients at a constant angle of attack were constant with a variation of more than 2 orders of magnitude of Reynolds number at a free-stream Mach number M(sub infinity) of 8.00 and more than 1 order of magnitude variation at M(sub infinity) = 6.00 on the same body-wing hypersonic cruise configuration. These data were recorded under laminar, transitional, and turbulent boundary layer conditions with both hot-wall and cold-wall models. This report presents experimental data on 25 configurations of 17 models of both simple and complex geometry taken at M(sub infinity) = 6.00, 6.86, and 8.00 in 4 different hypersonic facilities. Aerodynamic calculations were made by computational fluid dynamics (CID) and engineering methods to analyze these data. The conclusions were that the normal force coefficients at a given altitude are constant with Reynolds numbers at hypersonic speeds and that the axial force coefficients recorded under laminar boundary-layer conditions at several Reynolds numbers may be plotted against the laminar parameter (the reciprocal of the Reynolds number to the one-half power) and extrapolated to the ordinate axis to determine the inviscid-wave-drag coefficient at the intercept.

  7. Development of the Air Force Contingency Contracting Course Framework

    DTIC Science & Technology

    1993-09-01

    AUTHOR(S) 7.PERFORMING ORGANIZATION NAME(S) AND ADORESS(ES) B. PERFORMING ORGANIZATION REPORT NUMBER Air Force Institute of Technology , WPAFB OH 45433...Logistics and Acquisition Management of the Air Force Institute of Technology Air Education and Training Command I- 0 artial Fulfillment of the...officers that were deployed in support of the contingency, as well as other more recent Air Force Institute of Technology 1AFIT) theses, corroborated

  8. Anthropometry of Brazilian Air Force pilots.

    PubMed

    da Silva, Gilvan V; Halpern, Manny; Gordon, Claire C

    2017-03-14

    Anthropometric data are essential for the design of military equipment including sizing of aircraft cockpits and personal gear. Currently, there are no anthropometric databases specific to Brazilian military personnel. The aim of this study was to create a Brazilian anthropometric database of Air Force pilots. The methods, protocols, descriptions, definitions, landmarks, tools and measurements procedures followed the instructions outlined in Measurer's Handbook: US Army and Marine Corps Anthropometric Surveys, 2010-2011 - NATICK/TR-11/017. The participants were measured countrywide, in all five Brazilian Geographical Regions. Thirty-nine anthropometric measurements related to cockpit design were selected. The results of 2133 males and 206 females aged 16-52 years constitute a set of basic data for cockpit design, space arrangement issues and adjustments, protective gear and equipment design, as well as for digital human modelling. Another important implication is that this study can be considered a starting point for reducing gender bias in women's career as pilots. Practitioner Summary: This paper describes the first large-scale anthropometric survey of the Brazilian Air Force pilots and the development of the related database. This study provides critical data for improving aircraft cockpit design for ergonomics and comprehensive pilot accommodation, protective gear and uniform design, as well as digital human modelling.

  9. Air Force, Cyberpower, Targeting: Airpower Lessons for an Air Force Cyberpower Targeting Theory

    DTIC Science & Technology

    2013-06-01

    clarity of what to target still appears vague . An analysis of Air Force Doctrine Document (AFDD) 3-60, Targeting, yields no further explanation...resources to deprive their use, strike at “ nerve centers,” government buildings, railways, stock exchange, and attack the population itself to affect

  10. 33 CFR 334.1280 - Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force. 334.1280 Section 334.1280 Navigation and Navigable... REGULATIONS § 334.1280 Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force....

  11. 33 CFR 334.1280 - Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force. 334.1280 Section 334.1280 Navigation and Navigable... REGULATIONS § 334.1280 Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force....

  12. 33 CFR 334.1280 - Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force. 334.1280 Section 334.1280 Navigation and Navigable... REGULATIONS § 334.1280 Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force....

  13. 33 CFR 334.1280 - Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force. 334.1280 Section 334.1280 Navigation and Navigable... REGULATIONS § 334.1280 Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force....

  14. 33 CFR 334.1280 - Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force. 334.1280 Section 334.1280 Navigation and Navigable... REGULATIONS § 334.1280 Bristol Bay, Alaska; air-to-air weapon range, Alaskan Air Command, U.S. Air Force....

  15. An Interdisciplinary Approach to Drag Forces: Estimating Floodwater Speed from Displaced Riverbed Boulders

    ERIC Educational Resources Information Center

    Pestka, Kenneth A., II; Heindel, Jennifer

    2015-01-01

    This activity is designed to illustrate an application of resistive forces in the introductory physics curriculum with an interdisciplinary twist. Students are asked to examine images of riverbed boulders after a flood and estimate the water flow that was needed to push the boulders downstream. The activity provides an opportunity for students to…

  16. Performance Level Differences in Swimming: A Meta-Analysis of Passive Drag Force

    ERIC Educational Resources Information Center

    Havriluk, Rod

    2005-01-01

    The streamline is a basic position for competitive swimming starts mid turns and has been used in many studies on resistive forces. However, there is a wide yahweh, of theoretical interpretations in these studies, leading to diverse and questionable conclusions. The purpose of this study was to determine performance level differences in the…

  17. Measuring the Effects of Lift and Drag on Projectile Motion

    NASA Astrophysics Data System (ADS)

    Cross, Rod

    2012-02-01

    The trajectory of a projectile through the air is affected both by gravity and by aerodynamic forces. The latter forces can conveniently be ignored in many situations, even when they are comparatively large. For example, if a 145-g, 74-mm diameter baseball is pitched at 40 ms-1 (89.5 mph), it experiences a drag force of about 1.5 N. The gravitational force on the ball 1.42 N. Nevertheless, the trajectory of a baseball pitched without spin is not strongly affected by the drag force. Because the ball is relatively heavy and the flight distance is relatively small (about 60 ft), the drag force reduces the ball speed by only about 10% by the time it reaches the batter. As a result, the time taken for the ball to reach the batter is only about 5% longer than in a vacuum, and the actual trajectory is also very similar.2

  18. Air Force Civil Engineer, Volume 9, Number 1, Spring 2001

    DTIC Science & Technology

    2001-01-01

    I had to convince people of.� Young, a heavy equipment operator who has worked snow removal at Grand Forks Air Force Base, N.D.; Osan Air Base, Korea...storage tanks at Spangdahlem AB, Germany. Geer is a 2000 Lance P. Sijan Air Force Leadership Award recipient. (Photo by SrA Esperanza Berrios) 31 CE

  19. Targeting, Air Force Doctrine Document 2-1.9

    DTIC Science & Technology

    2006-06-08

    this ability at the beginning of a future national emergency might prove disastrous! —John Glock “The Evolution of Air Force...Washington, DC: US GPO). 1992. Glock , John, “The Evolution of Air Force Targeting,” Airpower Journal, Fall 1994 (Maxwell AFB, AL: Air University (AU

  20. United States Air Force Statistical Digest, Fiscal Year 1995

    DTIC Science & Technology

    1996-05-01

    Plans, Systems & Mr John J. Nethery Analysis) Director (Comptroller Support) Col R. W. Schuetz Director (Audit Liaison & Follow-Up) Mr Vaughn Schlunz...EDUCATION AND TRAINING COMMAND The Commander 2nd Air Force 19th Air Force Air University Gen Billy J. Boles Maj Gen Henry M. Hobgood Maj Gen

  1. Air Force Contracting Strategic Plan 2009-2013

    DTIC Science & Technology

    2008-09-01

    Force Contracting Products and Services, and Air Force Contracting Customers and Stakeholders. Section 2, Overview of Strategic Planning , describes the...Strategic Plan Components, Strategic Planning Approach, Governance, and Action Plans. Section 3, Air Force Contracting Strategy, reviews Vision, Mission, Guiding Principles, and Goals and Objectives.

  2. Air Force Organizational Transformation: Merging the Active and Reserve Components

    DTIC Science & Technology

    2007-11-02

    34Future Total Force." 18 34 Ibid. 35 Ibid. 36 John A. Tirpak, "The Blended Wing Goes to War," Air Force Magazine, October 2003. [ Jounal on-line...Space Power 3 (Fall 2004): 41-53. Tirpak, John A. "The Blended Wing Goes to War," Air Force Magazine, October 2003. Jounal on-line. Available from

  3. Evaluation of Skin Friction Drag for Liner Applications in Aircraft

    NASA Technical Reports Server (NTRS)

    Gerhold, Carl H.; Brown, Martha C.; Jasinski, Christopher M.

    2016-01-01

    A parameter that is gaining significance in the evaluation of acoustic liner performance is the skin friction drag induced by air flow over the liner surface. Estimates vary widely regarding the amount of drag the liner induces relative to a smooth wall, from less than a 20% increase to nearly 100%, and parameters such as face sheet perforate hole diameter, percent open area, and sheet thickness are expected to figure prominently in the skin friction drag. Even a small increase in liner drag can impose an economic penalty, and current research is focused on developing 'low drag' liner concepts, with the goal being to approach the skin friction drag of a smooth wall. The issue of skin friction drag takes on greater significance as airframe designers investigate the feasibility of putting sound absorbing liners on the non-lifting surfaces of the wings and fuselage, for the purpose of reducing engine noise reflected and scattered toward observers on the ground. Researchers at the NASA Langley Research Center have embarked on investigations of liner skin friction drag with the aims of: developing a systematic drag measurement capability, establishing the drag of current liners, and developing liners that produce reduced drag without compromising acoustic performance. This paper discusses the experimental procedures that have been developed to calculate the drag coefficient based on the change in momentum thickness and the companion research program being carried out to measure the drag directly using a force balance. Liner samples that are evaluated include a solid wall with known roughness and conventional liners with perforated facesheets of varying hole diameter and percent open area.

  4. Environmental Assessment for Air Force Research Laboratory Space Vehicles Integrated Experiments Division Office Space at Kirtland Air Force Base, Albuquerque, New Mexico

    DTIC Science & Technology

    2005-06-01

    AIR FORCE RESEARCH LABORATORY SPACE VEHICLES INTEGRATED EXPERMENTS DIVISION OFFICE SPACE AT KIRTLAND AIR FORCE ... Kirtland Air Force Base (KAFB). The office building would house the Air Force Research Laboratory Space Vehicles Integrated Experiments Division...ADDRESS(ES) Air Force Research Laboratory ,Space Vehicles Directorate,3550 Aberdeen Ave. SE, Kirtland

  5. An Interdisciplinary Approach to Drag Forces: Estimating Floodwater Speed from Displaced Riverbed Boulders

    NASA Astrophysics Data System (ADS)

    Pestka, Kenneth A.; Heindel, Jennifer

    2015-05-01

    This activity is designed to illustrate an application of resistive forces in the introductory physics curriculum with an interdisciplinary twist. Students are asked to examine images of riverbed boulders after a flood and estimate the water flow that was needed to push the boulders downstream. The activity provides an opportunity for students to gain an understanding of the physics of natural phenomena with applications to environmental science and environmental engineering, to gain a stronger appreciation for physical modeling and estimation, and to become environmental detectives!

  6. Range maximization and brachistochrone problem with Coulomb friction, viscous drag and accelerating force

    NASA Astrophysics Data System (ADS)

    Cherkasov, O. Yu.; Zarodnyuk, A. V.; Bugrov, D. I.

    2017-01-01

    The range maximization problem and corresponding the brachistochrone problem with Coulomb, viscous friction and accelerating force are considered. A Maximum Principle procedure is applied to reduce optimal problem to the boundary-value problem for the system of two nonlinear differential equations. Solutions of this system are corresponding to the motion under singular control. The qualitative analysis of the solutions is carried out. It allows to install the characteristic properties of the trajectories, unnoticed in a number of publications as well as to confirm the hypothesis and the results of numerical calculations presented in other sources.

  7. Tough Tommy’s Space Force: General Thomas S. Power and the Air Force Space Program

    DTIC Science & Technology

    2016-06-01

    owe deep thanks to Archie Difante, Maranda Gilmore, Tammy Horton, and the staff of the Air Force Historical Research Agency for their help finding...Power and SAC in historical context of both the Air Force and the national space program. Also, I must thank Dr. Tom Hughes for explaining to an...development. They could envision future potential by which armies, navies, and air forces should best deploy forces to defeat their enemies.”2

  8. A Return on Investment Analysis of Air Force Officer Accessions

    DTIC Science & Technology

    2014-02-13

    AIR WAR COLLEGE AIR UNIVERSITY A RETURN ON INVESTMENT ANALYSIS OF AIR FORCE OFFICER ACCESSIONS by David O’Malley, LtCol, USAF...Lieutenant Colonel David O’Malley is assigned to the Air War College , Air University, Maxwell AFB, AL. Before attending the Air War College , LtCol O’Malley...the candidate’s junior and senior years of college , and a non-scholarship program. 3 Upon graduating from college , all ROTC candidates receive a four

  9. Public-Private Partnerships at Air Force Maintenance Depots

    DTIC Science & Technology

    2010-06-10

    Report No. D-2010-067 June 10, 2010 Public - Private Partnerships at Air Force Maintenance Depots Report...2. REPORT TYPE 3. DATES COVERED 00-00-2010 to 00-00-2010 4. TITLE AND SUBTITLE Public - Private Partnerships at Air Force Maintenance Depots 5a...June 10, 2010 i Results in Brief: Public - Private Partnerships at Air Force Maintenance Depots What We Did We

  10. Air Force's First C-17 Flies into Retirement

    NASA Video Gallery

    The U.S. Air Force has retired its first C-17 transport after 21 years as a flight test aircraft and use in joint NASA-USAF propulsion research. NASA research pilot Frank Batteas, who was an Air Fo...

  11. Cape Canaveral Air Force Station, Launch Complex 39, Solid Rocket ...

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

    Cape Canaveral Air Force Station, Launch Complex 39, Solid Rocket Booster Disassembly & Refurbishment Complex, Thrust Vector Control Deservicing Facility, Hangar Road, Cape Canaveral, Brevard County, FL

  12. Parametric Estimation of Load for Air Force Data Centers

    DTIC Science & Technology

    2015-03-27

    PARAMETRIC ESTIMATION OF LOAD FOR AIR FORCE DATA CENTERS THESIS Presented to the Faculty Department of Systems Engineering and Management Graduate...School of Engineering and Management Air Force Institute of Technology Air University Air Education and Training Command In Partial Fulfillment of...LtCol Brent Langhals, USAF, Ph.D. (Member) iv AFIT-ENV-MS-15-M-170 Abstract The Office of Management and Budget (OMB) has tasked

  13. A study of drag forces on attached colloidal particles in a packed bed using multiscale numerical modeling

    NASA Astrophysics Data System (ADS)

    Mirsaeidi-Farahani, A.; Thompson, K. E.

    2012-12-01

    velocity distributions are used to explain scenarios that cause particles to experience larger or smaller relative drag. We also analyze the forces on multiple adjacent attached particles, using this to help explain behavior where a primary attachment may lead to a greater likelihood that additional particles will become retained at that location.

  14. Environmental Assessment for the Air Force Research Laboratory Security Fence Project, Edwards Air Force Base, California

    DTIC Science & Technology

    2012-11-26

    flanks of the hills are blanketed by Quaternary- aged alluvial fans consisting of water-laid sand and gravel deposits. The valley floor is composed...bedded clay and sand, interfingered with the encroaching alluvial fan deposits. Playa margins have shoreline sand deposits from the wetter middle and...AFRL and are detailed as follows (United States Air Force 2008a):  Alluvial fans in the AFRL and proposed fence project area primarily consist of

  15. Is the Current Royal Australian Air Force an Air Force of Strategic Influence?

    DTIC Science & Technology

    2015-02-17

    28. http://www.defence.gov.au/whitepaper2013/docs/WP_2013_web.pdf (accessed 03 Feb 2015). The Modern Air Force Transition from old to new ...benefit from the advantages arising from the Australia- New Zealand -United States (ANZUS) alliance, and the Australia-United States Defence Trade...States. 32 Five Power Defence Arrangements comprised of Australia, Malaysia, New Zealand , Singapore and the United Kingdom. be interoperable with

  16. Clear Air Force Station: Air Force Reviewed Costs and Benefits of Several Options before Deciding to Close the Power Plant

    DTIC Science & Technology

    2014-05-01

    Station with officials from Usibelli Coal Mine , and the grid tie-in project with an official from Golden Valley Electric Association. Further, we...with the selected offeror. Page 41 GAO-14-550 Clear Air Force Station to use the landfill located on the installation that is primarily...let the potential lessee use the landfill . • Available alternatives to Clear Air Force Station plant: Air Force officials said that Golden Valley

  17. 77 FR 69811 - U.S. Air Force Academy Board of Visitors; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-21

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors; Notice of Meeting AGENCY: U.S. Air... U.S. Air Force Academy (USAFA) Board of Visitors (BoV) will hold a meeting in the Capitol Building... Secretary of the Air Force, in consultation with the Office of the Air Force General Counsel, has......

  18. Space Age Swimsuit Reduces Drag, Breaks Records

    NASA Technical Reports Server (NTRS)

    2008-01-01

    A space shuttle and a competitive swimmer have a lot more in common than people might realize: Among other forces, both have to contend with the slowing influence of drag. NASA s Aeronautics Research Mission Directorate focuses primarily on improving flight efficiency and generally on fluid dynamics, especially the forces of pressure and viscous drag, which are the same for bodies moving through air as for bodies moving through water. Viscous drag is the force of friction that slows down a moving object through a substance, like air or water. NASA uses wind tunnels for fluid dynamics research, studying the forces of friction in gasses and liquids. Pressure forces, according to Langley Research Center s Stephen Wilkinson, dictate the optimal shape and performance of an airplane or other aero/hydro-dynamic body. In both high-speed flight and swimming, says Wilkinson, a thin boundary layer of reduced velocity fluid surrounds the moving body; this layer is about 2 centimeters thick for a swimmer.

  19. United States Air Force Summary, Third Edition

    DTIC Science & Technology

    1977-03-01

    Air Fields , Missile Sites, Electronics ’Stations or Sites, General Support Annexes, ond Ail’ National Guordlnstallations. AF/PRP0/� 1~ 1968 1969...wells and associated gas from petroleum fields . 6 DatClare for bClrley, corn, oats, tlce, rye, wheat, and mlsce.llaneous groins including pulses. - 7...USAF.Southern Air Di,,!klon .coth AIr Dtvlslon 4W AIr DMslon 12tkAlrDlvlslon t4thAIIDlYtslon A7th AIr Divfslon Ath AIr DIvision 51th Air DMslon lIGen J

  20. 19. DETAIL OF AIR FORCE WEATHER INFORMATION TERMINAL AND CHART ...

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

    19. DETAIL OF AIR FORCE WEATHER INFORMATION TERMINAL AND CHART RECORDER LOCATED IMMEDIATELY NORTH OF CONSOLE IN PHOTOS A-15 THROUGH A-18. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  1. Air Force Officers: Personnel Policy Development, 1944-1974

    DTIC Science & Technology

    1996-01-01

    Postwar Officer Corps, 1944-1945 ....... 7 General Arnold Confronts the Problem ....................... 9 Planning Fails to Keep Pace...Contents Photographs General of the Army Henry H. Arnold ............................ 8 General of the Army George C. Marshall...7 Air Force Officers General of the Army Henry H. Arnold , Commanding General of the Army Air Forces, 1942-1946. The problem was rooted in the prewar

  2. Living History: Pioneering Bandswomen of the United States Air Force

    ERIC Educational Resources Information Center

    Nichols, Jeananne

    2015-01-01

    This narrative describes two United States Air Force bandswomen whose combined careers span the past sixty years. Cornetist Martha (Martye) Jean Awkerman joined the U.S. Women in the Air Force (WAF) Band in 1955. She served the WAF band as cornet soloist and principal trumpet until the band was disbanded in 1961. In 1983, tubist Jan Duga joined…

  3. Gerontology Nurses: Are They Needed in the Air Force?

    DTIC Science & Technology

    1985-04-01

    Characteristics of Older Adults..................................................... 9 Nursing Care of the Older Adult...in Air Force facilities. Nursing care of the elderly is different due to several factors; (1) the cumulative effect of multiple chronic illness, (2...retiree utilization of Air Force hospitals and clinics (especially elderly retirees), and identify some unique nursing care needs of the elderly. The

  4. The Air Force and the Great Engine War,

    DTIC Science & Technology

    1987-01-01

    quickly as the Air Force wanted because of haggling over business terms. So at an Atlanta airport hotel , the Air Force and Pratt met quict’y and produced...6,3-64 prodluction slip, 34-35 55-58.test %lips. 32-33 engine stress factors re- thst saisf 323 defined 58-63 thrust not stisfactory 137 fan problems

  5. Buckley Air Force Base MS4 NPDES Permit

    EPA Pesticide Factsheets

    Under NPDES permit CO-R042003, the U.S. Air Force is authorized to discharge from all MS4 outfalls existing as of the effective date of this permit to specified receiving waters within the exterior boundaries of Buckley Air Force Base, in Aurora, Colorado

  6. 32 CFR 644.327 - Air Force military real property.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 4 2013-07-01 2013-07-01 false Air Force military real property. 644.327... PROPERTY REAL ESTATE HANDBOOK Disposal Procedure for Placing Real Property in Excess Status § 644.327 Air Force military real property. Military real property under the control of the Department of the...

  7. 32 CFR 644.327 - Air Force military real property.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Air Force military real property. 644.327 Section... PROPERTY REAL ESTATE HANDBOOK Disposal Procedure for Placing Real Property in Excess Status § 644.327 Air Force military real property. Military real property under the control of the Department of the...

  8. 32 CFR 644.327 - Air Force military real property.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 4 2011-07-01 2011-07-01 false Air Force military real property. 644.327... PROPERTY REAL ESTATE HANDBOOK Disposal Procedure for Placing Real Property in Excess Status § 644.327 Air Force military real property. Military real property under the control of the Department of the...

  9. 32 CFR 644.327 - Air Force military real property.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 4 2014-07-01 2013-07-01 true Air Force military real property. 644.327 Section... PROPERTY REAL ESTATE HANDBOOK Disposal Procedure for Placing Real Property in Excess Status § 644.327 Air Force military real property. Military real property under the control of the Department of the...

  10. 32 CFR 644.327 - Air Force military real property.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 4 2012-07-01 2011-07-01 true Air Force military real property. 644.327 Section... PROPERTY REAL ESTATE HANDBOOK Disposal Procedure for Placing Real Property in Excess Status § 644.327 Air Force military real property. Military real property under the control of the Department of the...

  11. Attitudes toward Counseling and Counseling Willingness of Air Force Personnel.

    ERIC Educational Resources Information Center

    Beeson, Gilbert W., Jr.

    This study attempts to measure the attitudes of Air Force personnel toward counseling, the willingness of Air Force personnel to seek counseling for personal problems, and the relationships which exist between selected variables and attitude-counseling willingness. The variables examined were technical versus non-technical occupations, length of…

  12. Educating Air Force Mortuary Officers: Confronting Death Anxiety.

    ERIC Educational Resources Information Center

    Giles, Karen

    1993-01-01

    Instructor at Air Force Institute of Technology describes role in preparing officers and noncommissioned officers to care for Air Force's dead, thus making them mortuary officers. Notes that officers possess no special skills, are not tested for psychological aptitude, and are not given any initial special/additional training. Describes…

  13. Training Teachers at the U.S. Air Force Academy.

    ERIC Educational Resources Information Center

    Brickell, James L.; And Others

    1991-01-01

    Outlines the teacher training program developed by the the U.S. Air Force Academy. Focuses on effective teaching methods that maintain the sharp quality of instruction needed to offset any confounding effects resulting from the frequent turnover in the engineering faculty, which is comprised almost entirely of active-duty Air Force officers on…

  14. Shaping the Air Force Narrative for the 21st Century

    DTIC Science & Technology

    2009-04-01

    themselves via the internet in the form of social networking sites and blogs, present both a challenge to the Air Force as well as an opportunity to more...opportunity for Airmen to take advantage of new media to communicate the Air Force Story to the American people via social networking sites such as

  15. Air Force Contingency Contracting: Reachback and Other Opportunities for Improvement

    DTIC Science & Technology

    2011-01-01

    9 CCO Perceptions of Their Work...MNSTC-I Multi-National Security Transition Command–Iraq OEF Operation Enduring Freedom OIF Operation Iraqi Freedom PAF RAND Project AIR FORCE PCO ...by some organizations in the Air Force and the Army, and the perception exists that using it more could lead to fewer deployments (thus reducing

  16. United States Air Force Child Care Center Infant Care Guide.

    ERIC Educational Resources Information Center

    Craig, Ardyn; And Others

    Intended to guide Air Force infant caregivers in providing high quality group care for infants 6 weeks to 6 months of age, this infant care guide must be used in conjunction with other Air Force regulations on day care, such as AFR 215-1, Volume VI (to be renumbered AFR 215-27). After a brief introductory chapter (Chapter I), Chapter II indicates…

  17. Mobile Quarantine Facility unloaded at Ellington Air Force Base, Texas

    NASA Technical Reports Server (NTRS)

    1969-01-01

    A Mobile Quarantine Facility, with the three Apollo 11 crewmen inside, is unloaded from a U.S. Air Force C141 transport at Ellington Air Force Base early Sunday after a flight from Hawaii. A large crowd was present to welcome Astronauts Neil Armstrong, Michael Collins and Edwin Aldrin Jr. back to Houston following their historic lunar landing mission.

  18. Preliminary Evaluation of the Effectiveness of Air Force Advertising.

    ERIC Educational Resources Information Center

    Vitola, Bart M.

    The Airman Enlistment Questionnaire was administered to a sample of non prior service enlistees, 1,667 males and 300 females. Analysis of the responses shows (1)educational opportunity is the strongest motivator for enlisting in the Air Force; (2) there is an indication that Air Force advertising should make different appeals to men and women; and…

  19. Irregular Warfare. Air Force Doctrine Document 2-3

    DTIC Science & Technology

    2007-08-01

    often force US and coalition forces to mass, preventing smaller, less intrusive exposure to the civilian population. 13 The level of violence...involvement when required. These effects can be lethal or non-lethal. In addition, these effects can be sustained for a long period with less risk ...The minimal footprint of Air Force forces allows the application of military force with relatively little exposure to adversaries and populations

  20. Values identified in different groups of Air Force nurses.

    PubMed

    Hutchison, B G; All, A C; Loving, G L; Nishikawa, H A

    2001-02-01

    Fundamental personal values are reflected in the choices and decisions made in every aspect of our lives. This descriptive study identified values held by a convenience sample of 224 Air Force nurses stationed at four U.S. Air Force medical facilities. Study participants identified seven of eight literature-supported values in the categories "important" or "very important" across the demographic factors of age, gender, educational level, military rank, marital status, and years of Air Force or civilian nursing experience. These seven values were ability utilization, achievement, altruism, autonomy, economic reward, economic security, and personal development. Personnel using this information may ease the transition process to military nursing, facilitate job placement to positions reflecting personally held values, and provide valuable insight for Air Force nurse recruiters who have limited knowledge of the nursing profession. In all, this would promote job satisfaction and Air Force nurse retention.

  1. Dynamic drag force based on iterative density mapping: A new numerical tool for three-dimensional analysis of particle trajectories in a dielectrophoretic system.

    PubMed

    Knoerzer, Markus; Szydzik, Crispin; Tovar-Lopez, Francisco Javier; Tang, Xinke; Mitchell, Arnan; Khoshmanesh, Khashayar

    2016-02-01

    Dielectrophoresis is a widely used means of manipulating suspended particles within microfluidic systems. In order to efficiently design such systems for a desired application, various numerical methods exist that enable particle trajectory plotting in two or three dimensions based on the interplay of hydrodynamic and dielectrophoretic forces. While various models are described in the literature, few are capable of modeling interactions between particles as well as their surrounding environment as these interactions are complex, multifaceted, and computationally expensive to the point of being prohibitive when considering a large number of particles. In this paper, we present a numerical model designed to enable spatial analysis of the physical effects exerted upon particles within microfluidic systems employing dielectrophoresis. The model presents a means of approximating the effects of the presence of large numbers of particles through dynamically adjusting hydrodynamic drag force based on particle density, thereby introducing a measure of emulated particle-particle and particle-liquid interactions. This model is referred to as "dynamic drag force based on iterative density mapping." The resultant numerical model is used to simulate and predict particle trajectory and velocity profiles within a microfluidic system incorporating curved dielectrophoretic microelectrodes. The simulated data are compared favorably with experimental data gathered using microparticle image velocimetry, and is contrasted against simulated data generated using traditional "effective moment Stokes-drag method," showing more accurate particle velocity profiles for areas of high particle density.

  2. Drag on Sessile Drops

    NASA Astrophysics Data System (ADS)

    Milne, Andrew J. B.; Fleck, Brian; Nobes, David; Sen, Debjyoti; Amirfazli, Alidad; University of Alberta Mechanical Engineering Collaboration

    2013-11-01

    We present the first ever direct measurements of the coefficient of drag on sessile drops at Reynolds numbers from the creeping flow regime up to the point of incipient motion, made using a newly developed floating element differential drag sensor. Surfaces of different wettabilities (PMMA, Teflon, and a superhydrophobic surface (SHS)), wet by water, hexadecane, and various silicone oils, are used to study the effects of drop shape, and fluid properties on drag. The relation between drag coefficient and Reynolds number (scaled by drop height) varies slightly with liquid-solid system and drop volume with results suggesting the drop experiences increased drag compared to similar shaped solid bodies due to drop oscillation influencing the otherwise laminar flow. Drops adopting more spherical shapes are seen to experience the greatest force at any given airspeed. This indicates that the relative exposed areas of drops is an important consideration in terms of force, with implications for the shedding of drops in applications such as airfoil icing and fuel cell flooding. The measurement technique used in this work can be adapted to measure drag force on other deformable, lightly adhered objects such as dust, sand, snow, vesicles, foams, and biofilms. The authours acknowledge NSERC, Alberta Innovates Technology Futures, and the Killam Trusts.

  3. Evaluating the Effectiveness of Air Force Foundational Cyberspace Training

    DTIC Science & Technology

    2012-06-14

    is contagious and his passion for both cyberspace and the Air Force provided continual motivation. viii Table of Contents Page Abstract...while the others enter a wide variety of Air Force specialties. The USAFA cyber training program was developed in coordination with Air University...commissioned more than 1,796 second lieutenants who entered active duty [8]. ROTC cadets receive two hours of instruction via lecture and guided

  4. Nellis Air Force Base Capital Improvements Program Environmental Assessment

    DTIC Science & Technology

    2013-08-01

    Engineer System ACM Asbestos -Containing Material ADP Area Development Plan AFB Air Force Base AGE Aerospace Ground Equipment AICUZ Air...of asbestos as a result of demolition of, or modifications to facilities; construction of new facilities; and stormwater discharge permits... Asbestos and Lead-Based Paint Removal and Disposal Prior to demolition or additions to buildings, asbestos surveys are required by Air Force regulation

  5. The Struggle for Air Force Independence, 1943-1947

    DTIC Science & Technology

    1997-01-01

    advocated a separate Department of Air, coequal with the Army and Navy. For- restal stressed that he was opposed to a separate Air Force, but that steps...certain important respects, however, For- restal was a logical selection. He had headed the Navy Department, and as Secre- tary of Defense he might be...func- tions from the Army to the Air Force. The first transfer order was signed by For- restal on September 26, 1947. It stipulated that functions of

  6. Morphometric Study for Estimation and Validation of Trunk Transverse Surface Area To Assess Human Drag Force on Water

    PubMed Central

    Morais, Jorge E; Costa, Mário J; Mejias, Erik J; Marinho, Daniel A; Silva, António J; Barbosa, Tiago M

    2011-01-01

    The aim of this study was to compute and validate estimation equations for the trunk transverse surface area (TTSA) to be used in assessing the swimmer’s drag force in both genders. One group of 133 swimmers (56 females, 77 males) was used to compute the estimation equations and another group of 131 swimmers (56 females, 75 males) was used for its validations. Swimmers were photographed in the transverse plane from above, on land, in the upright and hydrodynamic position. The TTSA was measured from the swimmer’s photo with specific software. Also measured was the height, body mass, biacromial diameter, chest sagital diameter (CSD) and the chest perimeter (CP). With the first group of swimmers, it was computed the TTSA estimation equations based on stepwise multiple regression models from the selected anthropometrical variables. For males TTSA=6.662*CP+17.019*CSD-210.708 (R2=0.32; Ra2=0.30; P<0.01) and for females TTSA=7.002*CP+15.382*CSD-255.70 (R2=0.34; Ra2=0.31; P<0.01). For both genders there were no significant differences between assessed and estimated mean TTSA. Coefficients of determination for the linear regression models between assessed and estimated TTSA were R2=0.39 for males and R2=0.55 for females. More than 80% of the plots were within the 95% interval confidence for the Bland-Altman analysis in both genders. PMID:23486932

  7. Modeling flows over gravel beds by a drag force method and a modified S-A turbulence closure

    NASA Astrophysics Data System (ADS)

    Zeng, C.; Li, C. W.

    2012-09-01

    A double-averaged Navier-Stokes equations (DANS) model has been developed for depth-limited open channel flows over gravels. Three test cases are used to validate the model: an open-channel flow over a densely packed gravel bed with small-scale uniform roughness (D/d50 ˜ 13, d50 = median diameter of roughness elements, D = water depth), open-channel flows over large-scale sparsely distributed roughness elements (D/Δ ˜ 2.3-8.7, Δ = roughness height) and steep slope gravel-bed river flows with D/d50 ˜ 7-25. Various methods of treatment of the gravel-induced resistance effect have been investigated. The results show that the wall function approach (WFA) is successful in simulating flows over small gravels but is not appropriate for large gravels since the vertical profile of the longitudinal velocity does not follow the logarithmic-linear relationship. The drag force method (DFM) performs better but the non-logarithmic velocity distribution generated by sparsely distributed gravels cannot be simulated accurately. Noting that the turbulence length scale within the gravel layer is governed by the gravel size, the DANS model incorporating the DFM and a modified Spalart-Allmaras (S-A) turbulence closure is proposed. The turbulence length scale parameter in the S-A model is modified to address the change in the turbulence structure within the gravel layer. The computed velocity profiles agree well with the corresponding measured profiles in all cases. Particularly, the model reproduces the S-shape velocity profile for sparsely distributed large size roughness elements. The modeling methodology is robust and can be easily integrated into the existing numerical models.

  8. 33 CFR 334.590 - Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Atlantic Ocean off Cape Canaveral... RESTRICTED AREA REGULATIONS § 334.590 Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base, Fla. (a) The danger zone. An area in the Atlantic Ocean immediately offshore...

  9. 33 CFR 334.590 - Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Atlantic Ocean off Cape Canaveral... RESTRICTED AREA REGULATIONS § 334.590 Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base, Fla. (a) The danger zone. An area in the Atlantic Ocean immediately offshore...

  10. 33 CFR 334.590 - Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Atlantic Ocean off Cape Canaveral... RESTRICTED AREA REGULATIONS § 334.590 Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base, Fla. (a) The danger zone. An area in the Atlantic Ocean immediately offshore...

  11. 33 CFR 334.590 - Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Atlantic Ocean off Cape Canaveral... RESTRICTED AREA REGULATIONS § 334.590 Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base, Fla. (a) The danger zone. An area in the Atlantic Ocean immediately offshore...

  12. 33 CFR 334.590 - Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Atlantic Ocean off Cape Canaveral... RESTRICTED AREA REGULATIONS § 334.590 Atlantic Ocean off Cape Canaveral, Fla.; Air Force missile testing area, Patrick Air Force Base, Fla. (a) The danger zone. An area in the Atlantic Ocean immediately offshore...

  13. Measuring the Effects of Lift and Drag on Projectile Motion

    ERIC Educational Resources Information Center

    Cross, Rod

    2012-01-01

    The trajectory of a projectile through the air is affected both by gravity and by aerodynamic forces. The latter forces can conveniently be ignored in many situations, even when they are comparatively large. For example, if a 145-g, 74-mm diameter baseball is pitched at 40 ms[superscript -1] (89.5 mph), it experiences a drag force of about 1.5 N.…

  14. Environmental Assessment: Black-Tailed Prairie Dog Management Cannon Air Force Base and Melrose Air Force Range, New Mexico

    DTIC Science & Technology

    2005-12-01

    1997). Domestic dogs and cats passing through prairie dog towns are susceptible to infection and may carry fleas to residential areas where humans...the Proposed Action is to manage the prairie dog population to ensure ecosystem stability, population control, genetic diversity, and successful...Environmental Assessment for Black-Tailed Prairie Dog Management for Cannon Air Force Base and Melrose Air Force Range, New Mexico United States Air

  15. Army Air Forces Statistical Digest, World War II

    DTIC Science & Technology

    1945-12-01

    34"C t=€~dC( 16 (Print Reviewer’S Name/duty title/phone numbyr) ;::" -e-. (fv ~ 1\\ :;’" e c ŕ-0 I"’ rt ~ D5 I\\P/I-+O (:c, 17 - 5 GOO p REPLY TO...ilase of Air Force activity: 1. CombatGroups 2. Personnel, Training and Crews 3. Aircraf’t and Equipll8nt 4. Operations 5 . M1scellaneou8 a. Budget lIIld...Air Forces (FEAF) - Fifth aDd Thirteenth Air Forces and seventh Air Force beginning July 1945. 5 . Chine and India-Burma (C&I~ - Tenth and Fourteenth Air

  16. 77 FR 51526 - U.S. Air Force Scientific Advisory Board; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-24

    ... FY13 Board schedule; the Air Force's science and technology needs with respect to space operations... Department of the Air Force U.S. Air Force Scientific Advisory Board; Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board, DoD. ACTION: Meeting notice. SUMMARY:...

  17. 77 FR 36492 - U.S. Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-19

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board Notice of Meeting AGENCY: U.S. Air Force Scientific Advisory Board, Department of the Air Force. ACTION: Meeting notice. SUMMARY: Due to difficulties, beyond the control of the U.S. Air Force Scientific Advisory Board or its Designated Federal Officer,...

  18. 76 FR 57026 - Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-15

    ... and the FY12 Board schedule; the Air Force's high dependence on space for navigation, timing... Department of the Air Force Air Force Scientific Advisory Board Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board ACTION: Meeting Notice. SUMMARY: Under...

  19. 76 FR 78906 - U.S. Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-20

    ... exploitation; ensuring cyber situational awareness for commanders; extended use of Air Force Space Command... Department of the Air Force U.S. Air Force Scientific Advisory Board Notice of Meeting AGENCY Department of the Air Force, U.S. Air Force Scientific Advisory Board. ACTION Meeting Notice. SUMMARY: Under...

  20. 77 FR 22770 - U.S. Air Force Scientific Advisory Board; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-17

    ...; ensuring cyber situational awareness for commanders; and extended use of Air Force Space Command space... Department of the Air Force U.S. Air Force Scientific Advisory Board; Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board. ACTION: Meeting notice. SUMMARY: Due...

  1. 77 FR 35365 - U.S. Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-13

    ... for commanders; and extended uses of Air Force Space Command space-based sensors. The draft FY13 SAB... Department of the Air Force U.S. Air Force Scientific Advisory Board Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board. ACTION: Meeting Notice. SUMMARY: Under...

  2. 77 FR 3750 - U.S. Air Force Academy Board of Visitors Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-25

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors Notice of Meeting AGENCY: U.S. Air Force... States Air Force Academy (USAFA) Board of Visitors (BoV) will hold a meeting in Harmon Hall at the United States Air Force Academy in Colorado Springs, Colorado on 10-11 Feb 2012. The meeting sessions on 10...

  3. 75 FR 13514 - U.S. Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-22

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board. ACTION: Meeting notice. SUMMARY: Under the... announces that the United States Air Force Scientific Advisory Board (SAB) meeting will take place...

  4. 78 FR 54634 - U.S. Air Force Academy Board of Visitors Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-05

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors Notice of Meeting AGENCY: U.S. Air Force Academy Board of Visitors, DOD. SUMMARY: In accordance with 10 U.S.C. 9355, the U.S. Air Force Academy (USAFA) Board of Visitors (BoV) will hold a meeting in Harmon Hall, United States Air Force Academy,...

  5. 78 FR 18326 - U.S. Air Force Scientific Advisory Board; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-26

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board; Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board. ACTION: Meeting notice. SUMMARY: Under the... announces that the United States Air Force Scientific Advisory Board (SAB) quarterly meeting will take...

  6. 78 FR 55686 - U.S. Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-11

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board. SUMMARY: Under the provisions of the Federal... United States Air Force Scientific Advisory Board (SAB) meeting will take place 23-24 Sep 2013 at...

  7. 76 FR 28215 - U.S. Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-16

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board, DoD. ACTION: Meeting notice. SUMMARY: Under... Defense announces that the United States Air Force Scientific Advisory Board (SAB) meeting will take...

  8. 78 FR 13329 - U.S. Air Force Academy Board of Visitors Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-27

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors Notice of Meeting AGENCY: U.S. Air Force.... Air Force Academy (USAFA) Board of Visitors (BoV) will hold a meeting in Harmon Hall at the United States Air Force Academy in Colorado Springs, Colorado on March 15-16, 2013. The meeting will begin at...

  9. 75 FR 22392 - US Air Force Academy Board of Visitors Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-28

    ... Department of the Air Force US Air Force Academy Board of Visitors Notice of Meeting AGENCY: US Air Force Academy Board of Visitors. ACTION: Meeting notice. SUMMARY: Pursuant to 10 U.S.C. 9355, the US Air Force... CFR 102-3.155, the Administrative Assistant to Secretary of the Air Force has determined that...

  10. 76 FR 18537 - U.S. Air Force Scientific Advisory Board; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-04

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board; Notice of Meeting AGENCY: Department of the Air Force, US Air Force Scientific Advisory Board. ACTION: Meeting notice. SUMMARY: Under the... announces that the United States Air Force Scientific Advisory Board (SAB) meeting will take place on...

  11. 76 FR 69712 - U.S. Air Force Scientific Advisory Board; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-09

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board; Notice of Meeting AGENCY: Department of the Air Force, U.S. Air Force Scientific Advisory Board. ACTION: Meeting notice. SUMMARY: Due to difficulties, beyond the control of the U.S. Air Force Scientific Advisory Board (SAB) or its...

  12. 76 FR 65187 - U.S. Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-20

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board Notice of Meeting AGENCY: US Air Force Scientific Advisory Board, Department of the Air Force, DoD. ACTION: Meeting Cancellation Notice. SUMMARY: Due to difficulties, beyond the control of the U.S. Air Force Scientific Advisory Board or...

  13. 75 FR 32750 - US Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-09

    ... Department of the Air Force US Air Force Scientific Advisory Board Notice of Meeting AGENCY: Department of the Air Force, US Air Force Scientific Advisory Board. ACTION: Meeting Notice. SUMMARY: Under the... announces that the United States Air Force Scientific Advisory Board (SAB) meeting will take place...

  14. 78 FR 77664 - U.S. Air Force Scientific Advisory Board Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-24

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board Notice of Meeting AGENCY: U.S. Air Force Scientific Advisory Board, Department of the Air Force. ACTION: ACTION:Meeting notice. SUMMARY: Under the... Defense announces that the United States Air Force (USAF) Scientific Advisory Board (SAB) meeting...

  15. 78 FR 26758 - U.S. Air Force Scientific Advisory Board; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-08

    ... Department of the Air Force U.S. Air Force Scientific Advisory Board; Notice of Meeting AGENCY: U.S. Air Force Scientific Advisory Board, Department of the Air Force. ACTION: Meeting notice. SUMMARY: Under the... announces that the United States Air Force Scientific Advisory Board (SAB) meeting will take place 25...

  16. Aviators, Air Combat, and Combat Stress: An Air Force Commander’s Primer

    DTIC Science & Technology

    1993-02-22

    airmen, and reviews the risky nature of the air combat environment. It goes on the describe the impact of stress on airmen and covers the Air Force’s...characteristics of airmen, and reviews the risky nature of the air combat environment. It goes on to describe the impact of stress on airmen and covers...sections review Air Force policy regarding aircrew psychological casualties as it has developed since the years of the First World War. The final parts of

  17. An investigation of drag reduction for tractor trailer vehicles with air deflector and boattail. [wind tunnel tests

    NASA Technical Reports Server (NTRS)

    Muirhead, V. U.

    1981-01-01

    A wind tunnel investigation was conducted to determine the influence of several physical variables on the aerodynamic drag of a trailer model. The physical variables included: a cab mounted wind deflector, boattail on trailer, flow vanes on trailer front, forced transition on trailer, and decreased gap between tractor and trailer. Tests were conducted at yaw angles (relative wind angles) of 0, 5, 10, 20, and 30 degrees and Reynolds numbers of 3.58 x 10 to the 5th power 6.12 x 10 to the 5th power based upon the equivalent diameter of the vehicles. The wind deflector on top of the cab produced a calculated reduction in fuel consumption of about 5 percent of the aerodynamic portion of the fuel budget for a wind speed of 15.3 km/hr (9.5 mph) over a wind angle range of 0 deg to 180 deg and for a vehicle speed of 88.5 km/hr (55 mph). The boattail produced a calculated 7 percent to 8 percent reduction in fuel consumption under the same conditions. The decrease in gap reduced the calculated fuel consumption by about 5 percent of the aerodynamic portion of the fuel budget.

  18. [Medical research in the US Armed Forces. (Report 5). The US Air Force and Coast Guard].

    PubMed

    Agapitov, A A; Aleĭnikov, S I; Bolekhan, V N; Ivchenko, E V; Krassiĭ, A B; Nagibovich, O A; Petrov, S V; Rezvantsev, M V; Soldatov, E A; Shalakhin, R A; Sheppli, E V

    2013-02-01

    The present article is the last part of the review dedicated to organization and management of medical research in the US Armed Forces. The first through fourth parts were published in the previous issues of the journal. Specifically this article is dedicated to organization and management of medical research in the US Air Force and Coast Guard. It is shown that in the US Air Force the medical research is conducted in the Air Force Research Laboratory and in the US Coast Guard--in its Research and Development Center. The particular research programs conducted in the above mentioned units are discussed.

  19. 32 CFR 809a.9 - Conditions for use of Air Force resources.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... is not intended to extend Air Force responsibilities in emergencies to generate additional resources... but near an Air Force installation, thereby necessitating Air Force assumption of responsibility... disaster compels immediate action to protect life and property and to restore order....

  20. 32 CFR 809a.9 - Conditions for use of Air Force resources.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... is not intended to extend Air Force responsibilities in emergencies to generate additional resources... but near an Air Force installation, thereby necessitating Air Force assumption of responsibility... disaster compels immediate action to protect life and property and to restore order....

  1. 2. GENERAL VIEW OF SLC3 AIR FORCE BUILDING (BLDG. 761) ...

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

    2. GENERAL VIEW OF SLC-3 AIR FORCE BUILDING (BLDG. 761) FROM THE NORTHWEST - Vandenberg Air Force Base, Space Launch Complex 3, SLC-3 Air Force Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  2. 1. GENERAL VIEW OF SLC3 AIR FORCE BUILDING (BLDG. 761) ...

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

    1. GENERAL VIEW OF SLC-3 AIR FORCE BUILDING (BLDG. 761) FROM THE SOUTHWEST - Vandenberg Air Force Base, Space Launch Complex 3, SLC-3 Air Force Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  3. Interior, looking northwest Beale Air Force Base, Perimeter Acquisition ...

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

    Interior, looking northwest - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Civil Engineering Storage Building, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  4. Exterior, looking west Beale Air Force Base, Perimeter Acquisition ...

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

    Exterior, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Civil Engineering Storage Building, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  5. Cape Canaveral Air Force Station, Launch Complex 39, The Solid ...

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

    Cape Canaveral Air Force Station, Launch Complex 39, The Solid Rocket Booster Assembly and Refurbishment Facility Manufacturing Building, Southeast corner of Schwartz Road and Contractors Road, Cape Canaveral, Brevard County, FL

  6. Interior, looking northeast Beale Air Force Base, Perimeter Acquisition ...

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

    Interior, looking northeast - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Microwave Equipment Building, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  7. Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic ...

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

    Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  8. 2. Northeast front. View to southwest. Offutt Air Force ...

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

    2. Northeast front. View to southwest. - Offutt Air Force Base, Looking Glass Airborne Command Post, Squadron Operations Building, At southwestern-most boundary of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  9. 77 FR 33202 - Department of the Air Force

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-05

    ...., a Delaware corporation, having a place of business at 187 Ballardvale Street, Suite A195, Wilmington... for industrial control systems, in any right, title and interest the Air Force has in U.S....

  10. General view. View to southwest Offutt Air Force Base, ...

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

    General view. View to southwest - Offutt Air Force Base, Looking Glass Airborne Command Post, Vehicle Refueling Station, Northeast of AGE Storage Facility at far northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  11. Offutt Air Force Base, Looking Glass Airborne Command Post, Vehicle ...

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

    Offutt Air Force Base, Looking Glass Airborne Command Post, Vehicle Refueling Station, Northeast of AGE Storage Facility at far northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  12. View of building 11070 showing vents and forced air system ...

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

    View of building 11070 showing vents and forced air system on east side, looking southwest. - Naval Ordnance Test Station Inyokern, China Lake Pilot Plant, Maintenance Shop, C Street, China Lake, Kern County, CA

  13. F.E. Warren Air Force Base NPDES Permit

    EPA Pesticide Factsheets

    Under NPDES permit CO-0034789, the USAF, F. E. Warren Air Force Base, is authorized to discharge from the Missile Launch Facilities located in northeastern Colorado to unnamed drainage ditches located in the Cedar Creek and Pawnee Creek drainage basins.

  14. GENERAL SITE PLAN, HAMILTON AIR FORCE BASE, MARIN COUNTY, CALIFORNIA. ...

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

    GENERAL SITE PLAN, HAMILTON AIR FORCE BASE, MARIN COUNTY, CALIFORNIA. Pencil on paper, dated December 4, 1952. Also marked "PWC 103474." By J.Y. Long Company, Engineers, Oakland, California - Hamilton Field, East of Nave Drive, Novato, Marin County, CA

  15. U.S. Air Force Academy NPDES Permit

    EPA Pesticide Factsheets

    Under NPDES permit CO-0020974, the U.S. Air Force Academy is authorized to discharge from its wastewater treatment facility in El Paso County, Colorado, to Non-Potable Reservoir No. 1 on Lehman Run and to Monument Creek.

  16. BMEWS Radar Beam Generation and Projection Clear Air Force ...

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

    BMEWS Radar Beam Generation and Projection - Clear Air Force Station, Ballistic Missile Early Warning System Site II, One mile west of mile marker 293.5 on Parks Highway, 5 miles southwest of Anderson, Anderson, Denali Borough, AK

  17. Space chimp Enos returns to Patrick Air Force Base

    NASA Technical Reports Server (NTRS)

    1961-01-01

    Enos the chimpanzee that orbited the earth twice in a Mercury spacecraft arrives back at Patrick Air Force Base. Enos landed some 220 nautical miles south of Bermuda and was picked up up by the U.S.S. Stormes.

  18. Interior view Beale Air Force Base, Perimeter Acquisition Vehicle ...

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

    Interior view - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Satellite Communications Terminal, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  19. CONTROL BUILDING, WEST FRONT SHOWING ENTRANCE Edwards Air Force ...

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

    CONTROL BUILDING, WEST FRONT SHOWING ENTRANCE - Edwards Air Force Base, X-15 Engine Test Complex, Firing Control Building, Rogers Dry Lake, east of runway between North Base & South Base, Boron, Kern County, CA

  20. Ballistic Missile Early Warning System Clear Air Force Station, ...

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

    Ballistic Missile Early Warning System - Clear Air Force Station, Ballistic Missile Early Warning System Site II, One mile west of mile marker 293.5 on Parks Highway, 5 miles southwest of Anderson, Anderson, Denali Borough, AK

  1. Exterior, looking north Beale Air Force Base, Perimeter Acquisition ...

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

    Exterior, looking north - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Supply Warehouse, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  2. Highbay Generator Room, looking northwest Beale Air Force Base, ...

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

    Highbay Generator Room, looking northwest - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Power Plant, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  3. Interior, looking northeast Beale Air Force Base, Perimeter Acquisition ...

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

    Interior, looking northeast - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Clean Lubrication Oil Storage Tank & Enclosure, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  4. Exterior, looking west Beale Air Force Base, Perimeter Acquisition ...

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

    Exterior, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Guard Tower, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  5. Interior Beale Air Force Base, Perimeter Acquisition Vehicle Entry ...

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

    Interior - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Gate House, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  6. Missile Warning Operations Center (MWOC) Beale Air Force Base, ...

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

    Missile Warning Operations Center (MWOC) - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Techinical Equipment Building, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  7. Interior, looking northeast Beale Air Force Base, Perimeter Acquisition ...

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

    Interior, looking northeast - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Emergency Generator Enclosure, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  8. Interior, looking southeast Beale Air Force Base, Perimeter Acquisition ...

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

    Interior, looking southeast - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Supply Warehouse, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  9. Interior, looking west Beale Air Force Base, Perimeter Acquisition ...

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

    Interior, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Guard Tower, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  10. Exterior, detail, looking west Beale Air Force Base, Perimeter ...

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

    Exterior, detail, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Power Plant, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  11. Looking north Beale Air Force Base, Perimeter Acquisition Vehicle ...

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

    Looking north - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Electric Substation, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  12. Exterior, looking southwest Beale Air Force Base, Perimeter Acquisition ...

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

    Exterior, looking southwest - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Emergency Generator Enclosure, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  13. Exterior, looking west Beale Air Force Base, Perimeter Acquisition ...

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

    Exterior, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Clean Lubrication Oil Storage Tank & Enclosure, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  14. 3. SOUTH SIDE. Edwards Air Force Base, South Base ...

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

    3. SOUTH SIDE. - Edwards Air Force Base, South Base Sled Track, Firing & Control Blockhouse for 10,000-foot Track, South of Sled Track at midpoint of 20,000-foot track, Lancaster, Los Angeles County, CA

  15. 6. OUTER BLAST DOOR, WEST REAR. Edwards Air Force ...

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

    6. OUTER BLAST DOOR, WEST REAR. - Edwards Air Force Base, South Base Sled Track, Firing & Control Blockhouse for 10,000-foot Track, South of Sled Track at midpoint of 20,000-foot track, Lancaster, Los Angeles County, CA

  16. 5. NORTH SIDE AND WEST REAR. Edwards Air Force ...

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

    5. NORTH SIDE AND WEST REAR. - Edwards Air Force Base, South Base Sled Track, Firing & Control Blockhouse for 10,000-foot Track, South of Sled Track at midpoint of 20,000-foot track, Lancaster, Los Angeles County, CA

  17. Standard operating procedure for air quality stationary source management at Air Force installations in the Air Force Materiel Command

    SciTech Connect

    Powell, C.M.; Ryckman, S.J.

    1997-12-31

    To sustain compliance and avoid future enforcement actions associated with air quality stationary sources and to provide installation commanders with a certification process for Title V permitting, and Air Force Materiel Command (AFMC) Standard Operating Procedure (SOP) for Stationary Source Management has been developed. The SOP consists of two major sections: Stationary Source Planning and Administration, and Stationary Source Operations These two main sections are further subdivided into twelve subsections which delineate requirements (e.g. maintaining inventories, applying for and maintaining permits, keeping records, reporting and certifying compliance) and assign ownership of processes and responsibilities (e.g. appointing a manager/alternate for each identified stationary air source). In addition, the SOP suggests training that should be provided from operator to commander levels to ensure that all personnel involved with a stationary air source are aware of their responsibilities. Implementation of the SOP should provide for the essential control necessary for installation commanders to eliminate stationary air source non-compliance and to certify compliance in accordance with the Title V Operating Permit requirements. This paper will discuss: the background and purpose for the SOPs content, the twelve subsections of the SOP, the success of implementation at various installations, the relevance or the recommended training, the success of negotiating with various labor unions for SOP implementation and the success of the SOP in reference to its intended purpose.

  18. Radiation pressure and air drag effects on the orbit of the balloon satellite 1963 30D

    NASA Technical Reports Server (NTRS)

    Slowey, J. W.

    1974-01-01

    Computed orbits of the balloon satellite 1963 30D are given every 2 days over an interval of 456 days near the beginning of the satellite's lifetime and an interval of 824 days near the end of its lifetime. The effects of radiation pressure on the satellite are examined in some detail. It is found that the variations in all the elements can be represented by use of a single parameter to specify the effect of diffuse reflection from the satellite's surface, and that this parameter remains constant, or nearly so, during the entire 7-year lifetime. Success in obtaining a consistent representation of the radiation-pressure effects is ascribed to the inclusion of the effects of terrestrial radiation pressure, using a model for the earth's albedo that includes seasonal and latitudinal variations. Anomalous effects in the orbital acceleration, as well as in the other elements, are represented quite well by including a small force at right angle to the solar direction and by allowing this to rotate about the solar direction. This implies that the satellite is aspherical, that it is rotating, and that the axis of rotation precesses.

  19. Zero-Base Budgeting Impact on Air Force Laboratories.

    DTIC Science & Technology

    1980-08-01

    effectiveness of budgeting and administration of Air Force research and development management KJ TNfT.A.TFT F.D StCURITY CLASSIFICATION OF THIS PAGE(When Data...progressive changes or reforms that 2 altered the planning- management -control balance of public administration.4 Following this trend, there have been... development organizations. Middle management as used herein refers to Air Force Systems Command laboratory commanders or chiefs. This derivation is based on

  20. Operations Research in a New Spanish Air Force Planning System

    DTIC Science & Technology

    1991-06-01

    Until nowadays, when any Air Force felt that a weapon system was obsolete, they studied the potential market , or they built up a system that fulfilled...for a new weapons system which will cover all the requirements. If the weapon system already exists in the national or foreign market , then the system...medium transport. This can be an important factor to be considered but, sometimes, the Spanish Air Force has to look at the for- eign markets for the

  1. Air Force Research Laboratory’s 2006 Technology Milestones

    DTIC Science & Technology

    2006-01-01

    suitable for the SOFC , permits the use of a reliable and easily operated fuel cell power system as an alternative to current mobile electric power (MEP...transfer, or technical achievement AFRL Technologies Air Force Office of Scientific Research (AFOSR) Mission Statement: AFOSR orchestrates the Air Force...and Microsystems Boundary Layers and Hypersonics Unsteady and Rotating Flows Combustion and Diagnostics Space Power and Propulsion Metallic Materials

  2. Air Force Civil Engineer, Volume 15, Number 2, 2007

    DTIC Science & Technology

    2007-01-01

    dedicated to it. Civil engineers at Air Force Materiel Command are learning to take it just as seriously. The Transformation plan for Air Force...engineering processes and discussed lessons learned from previous conversions to civilian workforces within AFMC, from A76 or direct actions. “I think it...we don’t have to spend that time learning in Afghanistan or Iraq and can use that time to focus on the mission and learning our area of operations

  3. The Air Force Role in Low-Intensity Conflict

    DTIC Science & Technology

    1986-10-01

    American scrap steel in 1940 . The United States may have to apply force to guarantee access to the materials American industry needs and to ensure...Unwin Brothers Ltd ., 1940 ), 173. 4. Flight Lieutenant F. A . Skoulding, "With Z Unit in Somaliland," The Royal Air Force Quarterly (July 1931): 390 . 5...Since 1918," lecture given at the RAF Staff College, Andover, England, 1923 . 10 . N. N. Golovine , Air Strategy (London: Gae and Polden, Ltd ., 1936), 24

  4. COIN in Cyberspace: Focusing Air Force Doctrine Development

    DTIC Science & Technology

    2007-01-01

    cyberspace and began codifying its cyber warfare doctrine. This effort is hampered, however, by a limited understanding of cyberspace by rank and file Air...Force members. Many believe cyberspace and cyber warfare are the responsibility of the communications community. If this new doctrine is to be...doctrine to build upon, the Air Force can create unity of effort among Airmen at all levels, ensure unity of purpose in the prosecution of cyber warfare , and

  5. Air Force Civil Engineer, Volume 10, Number 1, Spring 2002

    DTIC Science & Technology

    2002-01-01

    experiencing a different culture. The 219th RHF, a Montana Air National Guard unit, deployed to an Israeli Air Force base Jan. 2 through Feb. 9 to provide... meet changing world crises and will continue to work as planned. Our current global war on terrorism has an unknown, unpredictable duration. What does...AEF Center did a superb job of juggling issues with the commands to meet the force sizes needed and match the best available expeditionary combat

  6. Frontotemporal dementia affecting a U.S. Air Force officer.

    PubMed

    Faber, Raymond; Hill, Victoria M; Kim, Billy J

    2003-04-01

    We present the case of a 51-year-old former U.S. Air Force officer who developed marked behavioral and personality changes over a 9-year period, ultimately leading to his discharge from the Air Force at a rank below that which he achieved during service. Clinical diagnostic features, neuropsychological testing and neuroimaging together confirmed a diagnosis of frontotemporal dementia. This form of presenile dementia is discussed with reference to his case.

  7. United States Air Force Agency Financial Report 2013

    DTIC Science & Technology

    2013-01-01

    for Supply Management and Depot Maintenance activities. These functions provide goods and services to the Air Force and DoD customers , as well as... customer service; flexibility to respond to customer support needs in real-world situations; focus management attention on net operating results...supplies to customers in a timely manner within customer funding constraints, while maintaining fund solvency. The Air Force SMAG-R manages weapon

  8. Air Force Deployment Reintegration Research: Implications for Leadership

    DTIC Science & Technology

    2007-11-02

    Air Force Deployment Reintegration Research: Implications for Leadership Wendy Sullivan-Kwantes Angela R. Febbraro Ann-Renee Blais...TITLE AND SUBTITLE Air Force Deployment Reintegration Research: Implications for Leadership 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT...Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18 DRDC Toronto TR 2004-149 i Abstract Expanding on previous research on the reintegration

  9. United States Air Force Agency Financial Report 2014

    DTIC Science & Technology

    2014-01-01

    Air Force General Fund The General Fund is the fund into which most receipts of the United States Government are deposited . Exceptions include...receipts from specific sources required by law to be deposited into other designated funds and receipts from appropriations made by Congress to carry...capital (revolving), trust, special, and deposit funds. The Air Force uses these appropriations and funds to execute its missions and subsequently report

  10. Airmen First: Shaping the Expeditionary Air Force for Counterinsurgency

    DTIC Science & Technology

    2006-09-01

    American Power (New York: Basic Books, 2002), 336-352. 3 Airpower has played a role in fighting insurgents since Brigadier General John J. Pershing led the...operational effects on specific targets. See Honorable James G. Roche, Secretary of the Air Force, and General John P. Jumper, Chief of Staff, U.S. Air Force...operations characterized by irregular warfare—operations in which 20 John A. Nagl, Learning to Eat Soup with

  11. Quality Air Force and Deming’s Fourteen Points

    DTIC Science & Technology

    1994-04-01

    provide what seems to be impossible: not only maintaining, but also improving the quality of a downsized organization. The application of the TQM philosophy...a method that should provide what seems to be impossible at first blush: not only maintaining, but also improving the quality of a downsized ...provide foundation for Quality Air Force Course: "Faced with unprecedented downsizing , Air Force senior leadership sought a method to maintain and even

  12. United States Air Force Geophysics Scholar Program, 1982-1983.

    DTIC Science & Technology

    1984-03-01

    gold surface with < 0.1 eV of kinectic energy . The beam direction will be maintained at low energies by using a set of Helmholtz coils surrounding the...NATIONAL BUREAU Of STANDARDS 1963 A t II 1982-1983 LSAF/SCEEE AIR FORCE GEOPHYSICS SCHOLAR PROGRAM conducted by Southeastern Center for Electrical ...Bolling Air Force Base Washington D.C. by Southeastern Center for Electrical Engineering Education March 1984 IL ’a’ [ .1 Ai UNCLASSIFIED SECURITY

  13. Forced convection heat transfer to air/water vapor mixtures

    NASA Technical Reports Server (NTRS)

    Richards, D. R.; Florschuetz, L. W.

    1984-01-01

    Heat transfer coefficients were measured using both dry and humid air in the same forced convection cooling scheme and were compared using appropriate nondimensional parameters (Nusselt, Prandtl and Reynolds numbers). A forced convection scheme with a complex flow field, two dimensional arrays of circular jets with crossflow, was utilized with humidity ratios (mass ratio of water vapor to air) up to 0.23. The dynamic viscosity, thermal conductivity and specific heat of air, steam and air/steam mixtures are examined. Methods for determining gaseous mixture properties from the properties of their pure components are reviewed as well as methods for determining these properties with good confidence. The need for more experimentally determined property data for humid air is discussed. It is concluded that dimensionless forms of forced convection heat transfer data and empirical correlations based on measurements with dry air may be applied to conditions involving humid air with the same confidence as for the dry air case itself, provided that the thermophysical properties of the humid air mixtures are known with the same confidence as their dry air counterparts.

  14. Air Force Cyber Command (Provisional) Decision Support

    DTIC Science & Technology

    2010-01-01

    points and gave us a wide-ranging programmatic overview, while Lt Col Michelle Bowes gave us an assessment of program implementa- tion status, and...the benefit of excellent briefings from the Defense Information Systems Agency’s RADM Elizabeth Hight and Brig Gen Jennifer Napper, and from the Air...definition of cyberspace (which is more constrained than the Air Force’s initial concept) as a starting point ,12 there are still unanswered questions

  15. Peterson Air Force Base Transportation Plan Final Environmental Assessment

    DTIC Science & Technology

    2013-03-01

    Final Environmental Assessment Peterson Air Force Base Transportation Plan March 2013 FELSBURG H O L T & U L L E V I G Report Documentation Page Form...ABSTRACT unclassified c . THIS PAGE unclassified Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18 PETERSON AIR...4-1 4.2 Off-Base Activities

  16. Photographic copy of plan drawing, Department of the Air Force, ...

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

    Photographic copy of plan drawing, Department of the Air Force, Air Defense Command Directorate of Installations, May 28, 1954, Civil Engineers Office, in possession of Selfridge Base Museum, Mt. Clemens, Michigan. FLOOR PLAN, 826-198-4 - Selfridge Field, Building No. 199, South of George Avenue between Walnut & Birch Streets, Mount Clemens, Macomb County, MI

  17. STS-67 landing at Edwards Air Force Base

    NASA Technical Reports Server (NTRS)

    1995-01-01

    The Space Shuttle Endeavour, after completing a mission of almost 17 days duration in space, touches down on runway 22 at Edwards Air Force Base in southern California. Landing occurred at 1:46 p.m. (EST), March 18, 1995. In this photo the nose gear is still in the air as the orbiter touches down.

  18. The air forces on a systematic series of biplane and triplane cellule models

    NASA Technical Reports Server (NTRS)

    Munk, Max M

    1927-01-01

    The air forces on a systematic series of biplane and triplane cellule models are the subject of this report. The test consist in the determination of the lift, drag, and moment of each individual airfoil in each cellule, mostly with the same wing section. The magnitude of the gap and of the stagger is systematically varied; not, however, the decalage, which is zero throughout the tests. Certain check tests with a second wing section make the tests more complete and conclusions more convincing. The results give evidence that the present army and navy specifications for the relative lifts of biplanes are good. They furnish material for improving such specifications for the relative lifts of triplanes. A larger number of factors can now be prescribed to take care of different cases.

  19. United States Air Force Summer Research Program -- 1993. Volume 13. Phillips Laboratory

    DTIC Science & Technology

    1993-12-01

    Research Kirtland Air Force Base, Albuquerque, NM August 1993 14-1 My Summer Apprenticeship At Kirtland Air Force Base, Phillips Laboratory Andrea Garcia...AFOSR Summer Research Program Phillips Laboratory Sponsored By: Air Force Office of Scientific Research Kirtland Air Force Base, Albuquerque, NM... Phillips Laboratory Sponsored by: Air

  20. 78 FR 31907 - U.S. Air Force Academy Board of Visitors; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-28

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors; Notice of Meeting AGENCY: U.S. Air... 9355, the U.S. Air Force Academy (USAFA) Board of Visitors (BoV) will hold a meeting in the Russell... 102-3.155, the Administrative Assistant to the Secretary of the Air Force in consultation with...

  1. 76 FR 37794 - U.S. Air Force Academy Board of Visitors; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-28

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors; Notice of Meeting AGENCY: U.S. Air..., the United States Air Force Academy (USAFA) Board of Visitors (BoV) will meet in Harmon Hall, 2304... Designated Federal ] Officer (DFO) at the Air Force Pentagon address detailed below at any time. However,...

  2. 75 FR 6643 - U.S. Air Force Academy Board of Visitors; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-10

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors; Notice of Meeting AGENCY: U.S. Air Force Academy Board of Visitors. ACTION: Meeting notice. SUMMARY: Pursuant to 10 USC 9355, the US Air... the United States Air Force Academy in Colorado Springs, CO on 26-27 February 2010. The...

  3. 77 FR 52316 - U.S. Air Force Academy Board of Visitors; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-29

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors; Notice of Meeting AGENCY: U.S. Air..., the United States Air Force Academy (USAFA) Board of Visitors (BoV) will hold a meeting in Harmon Hall at the United States Air Force Academy in Colorado Springs, Colorado on 14-15 Sep 12. The...

  4. 76 FR 71333 - U.S. Air Force Academy Board of Visitors Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-17

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors Notice of Meeting AGENCY: U.S. Air Force.... Air Force Academy (USAFA) Board of Visitors (BoV) will hold a meeting in the Capitol Building Main.... Specific topics for this meeting include updates on ``Don't Ask Don't Tell;'' a National and Air...

  5. The Economics of Air Force Medical Service Readiness

    DTIC Science & Technology

    2010-01-01

    50 Effects of Converting Inpatient Facilities to Stand -Alone Clinics...for Air Force Medical Service Stand -Alone Clinics in CONUS...Force bases were closed after the end of the Cold War) and to the conversion of many hospitals into stand -alone clinics or ASCs. The reasons for

  6. Strategic Rebalance of the Three Component Air Force

    DTIC Science & Technology

    2013-03-01

    force. However, changes in policy, law, and culture will be necessary to anchor institutional change. 15. SUBJECT TERMS Balance , Capacity, Cost...Three Component Air Force Report Date: March 2013 Page Count: 40 Word Count: 6,629 Key Terms: Balance , Capacity...scarcity and a constantly evolving set of national security threats, makes achieving this balance a strategic imperative. Since its inception

  7. Forecasting Foreign Currency Exchange Rates for Air Force Budgeting

    DTIC Science & Technology

    2015-03-26

    Department of Systems Engineering and Management Graduate School of Engineering and Management Air Force Institute of Technology Air University Air...this thesis: the Federal Reserve Foreign Exchange Rate – H.10, the Global Insight forecasts, the Chicago Mercantile Exchange (CME) as taken through...foreign currency units per U.S. dollar for each day of the previous week (Board of Governors of the Federal Reserve System , 2015). Table 3 is a

  8. A Probabilistic Assessment of Failure for Air Force Building Systems

    DTIC Science & Technology

    2015-03-26

    desired end state for the community is an enterprise-wide asset management framework which can objectively assess an asset’s condition state and lead to...Department of Systems and Engineering Management Graduate School of Engineering and Management Air Force Institute of Technology Air University Air...Education and Training Command In Partial Fulfillment of the Requirements for the Degree of Master of Science in Engineering Management

  9. Air Force Handbook: 108th Congress First Session

    DTIC Science & Technology

    2003-01-01

    Infrastructure Background • Facilities infrastructure refers to bases, installations, real property, and their associated physical plants including buildings...depots required to execute Air Force mission. • Re-capitalizes organic depots--capital investment in plant , equipment and personnel. • Funds an additional...the Air provides flexible, fast -response air transport of stabilized patients shortly after surgery; combined EMEDS/ AE/CCATT action stabilized and

  10. An Assessment of Force Protection Knowledge in Air Force Civil Engineer Officers

    DTIC Science & Technology

    2005-03-01

    principles, effectiveness of current training, which training is effective and which needs improvement, and how officers feel about the training they...the level of force protection (FP) training to evaluate the effectiveness of FP training. To assess the level of force protection knowledge in civil...training effective at instilling force protection knowledge in Air Force civil engineer officers? 3. Which training is most effective at teaching FP

  11. AFCYBER: Postured to Support Air Force and USCYBERCOM Cyber Needs?

    DTIC Science & Technology

    2013-03-01

    Garamone, “ Alexander Details U.S. Cyber Command Gains,” September 24, 2010, from American Forces Press Service. 41 Brigadier General Franz , U.S. Cyber...missions. General Alexander , Commander USCYBERCOM, first envisions a cyber profession where communications, signals intelligence, cryptography...to support both USCYBERCOM and Air Force requirements. General Alexander considers having trained and ready forces as the single most important

  12. Environmental Assessment, Balloon Launch and Landing Operations, Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, New Mexico

    DTIC Science & Technology

    2012-06-01

    wetlands are in riparian zones and include oxbow lakes , marshes, cienegas, and bosques. Extreme aridity and seasonally varying precipitation are the...MAJOR RIVERS - LAKE RESERVOIR - TRIBAL LANDS D AFFECTED COUNTY IIBALDUR\\PROJIAFRL_396452\\MAPFILES\\EIS\\FIG2-2_EXCLUSION_ZONE MXD TMCBROOM 2117...ASSESSMENT, BALLOON LAUNCH AND LANDING OPERATIONS, AIR FORCE RESEARCH LABORATORY KIRTLAND AIR FORCE BASE - LAKE RESERVOIR MAJOR RIVERS

  13. Air Force Enlisted Force Management: System Interactions and Synchronization Strategies

    DTIC Science & Technology

    2007-01-01

    Defense OSI Office of Special Investigations PFE Promotion Fitness Exam PPBE Planning, Programming, Budgeting, and Execution RAW AFPC’s Retrieval...Force Management ness exam ( PFE ), score on the Skills Knowledge Test (SKT), time in service (TIS), and time in grade (TIG).8 Promotion to E8 and E9 has...the PFE . Tests that are more difficult lead to a wider range of test scores. Within an AFSC, this tends to favor good testers by 8 E4s–E6s earn up to

  14. Modeling of Reduction in the Drag and of Cessation of the Action of an Alternating Transverse Force on a Circular Cylinder due to the Throttling Effect

    NASA Astrophysics Data System (ADS)

    Isaev, S. A.; Sudakov, A. G.; Zhukova, Yu. V.; Usachovd, A. E.

    2014-07-01

    An analysis of the physical processes in unsteady fl ow past a circular cylinder surrounded by a sheath with ports for bleeding of the medium has been made by a factorized fi nite-volume method on the basis of numerical solution of Navier-Stokes equations closed with the Menter sheer-stress-transfer model. It has been shown that such arrangement of a circular cylinder ensures stabilization of the wake of the cylinder, and also the reduction in its drag and cessation of the action of an alternating transverse force at Reynolds numbers higher than 105.

  15. Weight Lift Capabilities of Air Force Basic Trainees

    DTIC Science & Technology

    1983-05-01

    month period of data collection. The 63 male Flights were selected at random during the same period. The age range for enlistment in the Air Force is...17 to 35 years. The age range for male subjects in this study was from 17 to 33 years with a mean of 19.75. More than 90 percent of the males were in...the 17 to 22 age group. The older subjects were entering the Air National Guard or the Air Force Reserves. The age range for the female subjects was

  16. Utility Building Plan, elevations and sections. March Air Force Base, ...

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

    Utility Building Plan, elevations and sections. March Air Force Base, Riverside, California, COmbat Operations Center, Utility Building. By Moffatt and Nichol, Engineers, 122 West Fifth Street, Long Beach, California; for the Corps of Engineers, U.S. Army, Office of the District Engineer, Los Angeles, California. Drawing no. AW-60-02-03, sheet no. 57, approved March, 1962; specifications no. ENG-04-353-62-66; D.O. series AW 1596/57, Rev. "B"; file drawer 1290. Last revised 3 October 1966 "drawings updated." Various scales. 29 x 41 inches. pencil on paper - March Air Force Base, Strategic Air Command, Utility Building, 5220 Riverside Drive, Moreno Valley, Riverside County, CA

  17. In-Well Air Stripping/Bioventing Study at Tyndall Air Force Base, Florida

    DTIC Science & Technology

    2012-08-30

    to determine the feasibility of incorporating in-well air stripping systems into the design of bioventing systems to effectively extend bioventing to...Force. This final report describes the Coupled In-Well Air Stripping/Bioventing Study conducted at Tyndall Air Force Base, Florida; the designs of the...the design of bioventing systems to effectively extend bioventing and simultaneously remediate hydrocarbon contamination in both the vadose and

  18. Air Force Strategy Study 2020-2030

    DTIC Science & Technology

    2011-01-01

    of Order in World Politics, 3rd ed. (New York: Columbia Univ. Press, 2002), 156. 44. A. F. K. Organski, World Politics (New York: Alfred A. Knopf...23. Joint Futures Group (J59), Joint Operating Environment 2010 (Suffolk, VA: Joint Forces Com- mand, 2010), 24. 24. Alfred Thayer Mahan, The...www.bu.edu/iscip/digest/vol16/ed1611a.shtml. 19. Lt Col Andrew Wallace , USAF, “Russian Federation: Armed Forces,” ISCIP Analyst 16, no. 3, pt. 1 (15

  19. Designing Forced-Air HVAC Systems

    SciTech Connect

    2010-08-31

    This guide explains proper calculation of heating and cooling design loads for homes.used to calculated for the home using the protocols set forth in the latest edition of the Air Conditioning Contractors of America’s (ACCA) Manual J (currently the 8th edition), ASHRAE 2009 Handbook of Fundamentals, or an equivalent computation procedure.

  20. [Professional psychological selection system in the Air Force - 50 years].

    PubMed

    Pokrovskiĭ, B L

    2014-08-01

    Given the data about the establishment of the professional psychological selection system in the Air Force in 1958-1964 in the NIIIAM Air Force by the team psychological department under the leadership of K.K.Platonova. Given the names of the developers of this system and given the results of their research. The result of all made work the order of Air Force Commander about the introduction of the psychological selection in Higher Military Aviation School of Pilots, starting from a set of 1964 became. Recommendations for professional psychological selection of a wide range of aviation professionals in various fields, and in the future - and other professionals of the Armed Forces, became the results of future work.

  1. Rand Project AIR FORCE Annual Report 2010

    DTIC Science & Technology

    2010-01-01

    assessments of technology feasibility, performance, cost, and risk. PAF assesses major force components needed in the future and the systems and...privatization, and contracting; the industrial base; planning, programming, and budgeting; infrastructure; and weapon- system cost estimating. The goal...6 Cyberattacks Are Possible Only Because of System Flaws . . . . . . . . . . 7

  2. Air Force Research Laboratory Fire Research (Postprint)

    DTIC Science & Technology

    2007-04-05

    High Pressure – Water or Foam Spray at ≥ 1200 psi. • Current emphasis on increasing throw distance. – Retrofit P-19 trucks with UHP system. • USAF set...suppressing large scale liquid hydrocarbon fuel fires. • UHP water and AFFF, compressed air foam, and combined agent AFFF-dry chemical systems. • Next...build a skid steered, all-terrain vehicle equipped with UHP and other advanced fire and rescue systems. • Closed Cell Foam Fire Protection – Develop

  3. Air Force Studies Board Block 00 Studies

    DTIC Science & Technology

    2016-07-14

    year, compared with the Air Force’s 65 trillion Btu. DuPont’s business goal is “sustainable growth ” that entails increasing shareholder and societal...the 40 percent increase in production. The commitment of senior leadership to sustainable growth is the key to DuPont’s success; this commitment...needed training while also benefiting those requiring training across the full range of military operations. Mr. Corley offered that simulations growth

  4. Air Force Handbook. 109th Congress

    DTIC Science & Technology

    2009-01-01

    operations. • The Civil Air Patrol (CAP) has been reener- gized to provide additional capabilities, like Hyper Spectral Imaging and Satellite Digital...refresh the weapon system’s hardware, software and infra - structure as required • Payload: N/A Functions/Performance Parameters Acquisition Status... infra - red satellite system providing global coverage and warning of ballistic missile launches, nuclear detonations, and other events

  5. Fuel Reduction for the Mobility Air Forces

    DTIC Science & Technology

    2015-01-01

    Mobility Command (AMC), published a pamphlet entitled “ Birds Fly Free, MAC Doesn’t.”1 Although the material is presented in a humorous way, the topics it...Division of Aircrew Standardization, “ Birds Fly Free, MAC Doesn’t,” pamphlet, Scott AFB, Ill.: Navigation and Performance Division of Aircrew...when the Military Airlift Command (MAC), now Air Mobility Command (AMC), published a pamphlet entitled “ Birds Fly Free, MAC Doesn’t.”1 In this

  6. The Evolution of Air Force Targeting

    DTIC Science & Technology

    2012-12-01

    campaign against Japan. This group eventually evolved into the first Joint Target Group . The deputy assistant chief of the Air Staff for targeting...Far East Command (GHQ FEC) as- sumed responsibility for targeting. The chief of staff established the GHQ Target Group on 14 July 1950 and made it...responsible for target nominations. However, the GHQ Target Group was not capable of performing this task. The work of this group was nei- ther

  7. Air Force Recruitment: A Geographic Perspective

    DTIC Science & Technology

    2000-11-01

    AVAILABILITY STATEMENT Unlimited distribution In Accordance With AFI 35-205/AFIT Sup 1 13. SUPPLEMENTARY NOTES 14. ABSTRACT 15. SUBJECT TERMS 16. SECURITY...CLASSIFICATION OF: 17. LIMITATION OF 18. NUMBER 19a. NAME OF RESPONSIBLE PERSON a. REPORT b. ABSTRACT c. THIS PAGE ABSTRACT OF PAGES 19b. TELEPHONE...Distributionl Unllkimit6d 20070129139 Arizona State University November 2000 ABSTRACT Beginning in 1973 the Armed Forces implemented an All Volunteer

  8. Institutional Memory and the US Air Force

    DTIC Science & Technology

    2016-01-01

    global security landscape with those of an uncertain future. Arguably, the genesis of this theoretical mind -set and practical application is World...of total war emerged from Napoleon’s ability to harness both the passion of the newly liberated French mind and the resources of the state through...could discern no logical ‘internal’ or self-imposed limit on the use of force.”3 When read selectively or uncritically, the Prussian’s writings can

  9. The United States Air force optometry residency program.

    PubMed

    Kent, J F

    1995-04-01

    The USAF Optometry Residency Program promotes an educational climate that facilitates the education and development of the resident doctor not only as an optometrist but also as a military officer. Development of self-directed education and decision making within the training period is emphasized. Residents are encouraged to examine and challenge existing ideas and to develop physiological concepts and principles so the practical application of these skills is reflected in active clinical practice and effective professional relationships. The Air Force Optometry Residency Program will train career-oriented Air Force optometrists in advanced clinical and diagnostic techniques, aerospace optometry, and clinic management including the latest continuous quality improvement concepts. Recent changes have enlarged the scope of practice for Air Force optometrists. This expanded scope of practice has created a need for a nucleus of residency-trained optometrists, skilled in the latest techniques of eye care, who return to the field and train their associates in these advanced techniques. Over 40 percent of Air Force optometry clinics are manned by one doctor of optometry. Residency-trained optometrists are able to provide a high level of comprehensive optometric care at these facilities. Through this program the Air Force can keep pace with the evolution of optometry and meet the challenge of providing the highest quality care to our patients.

  10. Minimizing Air Pollution During the Construction of Air Force Facilities

    DTIC Science & Technology

    1993-12-08

    within the work area. 2. Details of road construction. 3. Details of the completed quarry or borrow excavation. 4. Plans and cross sections of...this on the conditions in Rome: As soon as I had gotten out of the heavy air of Rome and from the stink of the smoky chimneys thereof, which, being...plants, locomotives and marine vessels, and in home heating fireplaces and furnaces. As far back as 1272, King Edward I of England tried to clear the smoky

  11. 32 CFR 806.27 - Samples of Air Force FOIA processing documents.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 6 2012-07-01 2012-07-01 false Samples of Air Force FOIA processing documents. 806.27 Section 806.27 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE ADMINISTRATION AIR FORCE FREEDOM OF INFORMATION ACT PROGRAM § 806.27 Samples of Air Force FOIA...

  12. 32 CFR 806.27 - Samples of Air Force FOIA processing documents.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 6 2014-07-01 2014-07-01 false Samples of Air Force FOIA processing documents. 806.27 Section 806.27 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE ADMINISTRATION AIR FORCE FREEDOM OF INFORMATION ACT PROGRAM § 806.27 Samples of Air Force FOIA...

  13. 32 CFR 806.27 - Samples of Air Force FOIA processing documents.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 6 2013-07-01 2013-07-01 false Samples of Air Force FOIA processing documents. 806.27 Section 806.27 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE ADMINISTRATION AIR FORCE FREEDOM OF INFORMATION ACT PROGRAM § 806.27 Samples of Air Force FOIA...

  14. Language Capability in the United States Air Force

    DTIC Science & Technology

    2009-03-01

    Col John L. Conway III, "The View from the Tower of Babel ," page 59. 24 Stephen Schwalbe, "Potential Air Force Shortfalls in Implementing the Defense...of Babel ," page 64. 32 Col John L. Conway III, "The View from the Tower ofBabel," page 61. 33 Defense Language Transformation Roadmap, January 2005...professionals. For example, at Khobar Towers , the 4404th Wing had only one interpreter on duty or on-call 24-hours a day. When Air Force Security

  15. The U.S. Air Force Academy Falcon Telescope Network

    DTIC Science & Technology

    2014-09-01

    3048 The U.S. Air Force Academy Falcon Telescope Network Francis K. Chun, Roger D. Tippets, Michael E. Dearborn Department of Physics, U.S. Air...The Falcon Telescope Network (FTN) is a global network of small aperture telescopes developed by the Center for Space Situational Awareness...provides the equipment (e.g. telescope , mount, camera, filter wheel, dome, weather station, computers and storage devices) while the educational partners

  16. The Air Force in Space, Fiscal Year 1962

    DTIC Science & Technology

    1966-06-01

    Historical Division Liaison Office. UNCLASSIFIED I. THE AIR Foam AND THE NATIONAL SPACE PROGRAM (U) When the Soviet Union launched Maj. Yuri A. Gagarin ...atter 17 orbits of the earth. (U) The Gagarin -Titov flights formed same of the background against which the Air Force renewed a campaign to win a...space might well be the key to national survival and pointed to Russian boasts that the rockets used to launch Gagarin and Titov could just as easily

  17. Effects Based Assessment in the United States Air Force

    DTIC Science & Technology

    2005-05-01

    during OIF includes: Predator and Global Hawk UAV, RC-135 Rivet Joint , E-8 JSTARS, E-3 AWACS, and overhead national assets. 59 Operation Iraqi Freedom...Moseley, Operation Iraqi Freedom (OIF) Joint Forces Air Component Commander (JFACC), succinctly described OIF assessment when he said, “BDA [was...only three weeks, the war was over. During these three weeks, Moseley’s air component provided crucial support to Frank’s joint campaign. In order

  18. Implementing Automated Information Systems in the Air Force

    DTIC Science & Technology

    1984-04-01

    phased development approach. V. Recommendations: The new Air Staff organization must exert creative leadership so the rest of the Air Force can benefit...ment - System design strategy, strike a new balance between machine efficiency and system effectiveness - Management control strategy. control the...cost- effectiveness (2s2-11 - 2-12). Viewing information as a resource has caused Federal agencies to reassess the way they have managed information in

  19. Air Force Civil Engineer, Winter 2001, Volume 9, Number 4

    DTIC Science & Technology

    2001-01-01

    Force and major command headquarters who stood up Crisis Action Teams (CATs). In New York, the governor called up more than 150 Air National Guard...giant,” brought our nation together, and focused our resolve on fighting and eliminating terrorism at the source. by Lt Col Gregory A. Cummings and Lt...SSgt Shane Cuomo) SSgt Alan Vanguilder, 148th CES, Minnesota Air National Guard, paints one of several newly constructed “road jacks” Oct.1. The Wing’s

  20. United States Air Force Academy (USAFA) Vertical Axis Wind Turbine.

    DTIC Science & Technology

    1980-09-01

    from the Savonius starting turbine alone. -63- SECTION VII CONCLUSIONS AND RECOMIENDATIONS 1. CONCLUSIONS One objective of the USAF Academy Wind ...Rotors, SAND76-0131. Albuquerque: July 1977. 10. Oliver, R.C. and P.R. Nixon. "Design Procedure for Coupling Savonius and Darrieus Wind Turbines ", Air...CHART -4 ESL-TR-8048 UNITED STATES AIR FORCE ACADEMY (USAFAI VERTICAL AXIS WIND TURBINE THOMAS E. KULLGREN DENNIS W. WIEDEMEIER DEPARTMENT OF ENGINEERING

  1. Benefits of an Air Force Contracting Warrant Officer Program

    DTIC Science & Technology

    2011-12-01

    2009). Course Management Plan . Fort Rucker Alabama : Warrant Officer Career College. Hackman, J. R., & Oldham , G. R. (1980). Work redesign. Reading...Acquisition Executive CMP Course Management Plan CO Commissioned Officer DAU Defense Acquisitions University DAWIA Defense Acquisition...contracting offices . They plan to grow their force by offering a blue to green program where Air Force NCOs will attain the status of Army warrant officer

  2. U.S. Air Force Posture Statement 2000

    DTIC Science & Technology

    2000-01-01

    buyouts (incentives) for force shaping. To sustain a civilian workforce, we need the right mix of new, mid-level, and se- nior employees. In the last...generation strike fighter aircraft for the Air Force, Navy, Marine Corps, and our allies. Current program 62 emphasis is on facilitating the evolution ... price is one quarter of the cost, and its develop- ment schedule is half the time, of similar missile programs. JASSM is currently undergoing flight

  3. Effect of Permeate Drag Force on the Development of a Biofouling Layer in a Pressure-Driven Membrane Separation System▿

    PubMed Central

    Eshed, L.; Yaron, S.; Dosoretz, C. G.

    2008-01-01

    The effect of permeate flux on the development of a biofouling layer on cross-flow separation membranes was studied by using a bench-scale system consisting of two replicate 100-molecular-weight-cutoff tubular ultrafiltration membrane modules, one that allowed flow of permeate and one that did not (control). The system was inoculated with Pseudomonas putida S-12 tagged with a red fluorescent protein and was operated using a laminar flow regimen under sterile conditions with a constant feed of diluted (1:75) Luria-Bertani medium. Biofilm development was studied by using field emission scanning electron microscopy and confocal scanning laser microscopy and was subsequently quantified by image analysis, as well as by determining live counts and by permeate flux monitoring. Biofilm development was highly enhanced in the presence of permeate flow, which resulted in the buildup of complex three-dimensional structures on the membrane. Bacterial transport toward the membrane by permeate drag was found to be a mechanism by which cross-flow filtration contributes to the buildup of a biofouling layer that was more dominant than transport of nutrients. Cellular viability was found to be not essential for transport and adhesion under cross-flow conditions, since the permeate drag overcame the effect of bacterial motility. PMID:18931284

  4. Prototypes of Cognitive Measures for Air Force Officers: Test Development and Item Banking

    DTIC Science & Technology

    1990-05-01

    AFHRL-TP-89-737 3, COPY AIR FORCE PROTOTYPES OF COGNITIVE MEASURES FOR AIR FORCE OFFICERS: TEST DEVELOPMENT AND ITEM BANKING DTIC f1 ELECTF H Frances...Jacobina Skinner MANPOWER AND PERSONNEL DIVISION R Brooks Air Force Base, Texas 78235-5601 E S O May 1990U Final Technical Paper for Period September 1987...November 1989 R C Approved for public release; distribution is unlimited. E S LABORATORY AIR FORCE SYSTEMS COMMAND BROOKS AIR FORCE BASE, TEXAS

  5. 76 FR 22083 - U.S. Air Force Academy Board of Visitors Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-20

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors Notice of Meeting AGENCY: U.S. Air Force Academy Board of Visitors. ACTION: Meeting notice. SUMMARY: Pursuant to 10 U.S.C. 9355, the U.S. Air Force... this meeting include an update on the ``Don't Ask Don't Tell'' way ahead; an Air Force perspective...

  6. 77 FR 24480 - U.S. Air Force Academy Board of Visitors Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-24

    ... Department of the Air Force U.S. Air Force Academy Board of Visitors Notice of Meeting AGENCY: U.S. Air Force....S.C. 9355 and 41 CFR 102-3.150, the U.S. Air Force Academy (USAFA) Board of Visitors (BoV) will hold... Update; an Air Force and US Defense Strategy Briefing; a Character Update; the USAFA 501(c)...

  7. 78 FR 17185 - U.S. Air Force Space Command Notice of Test

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-20

    ... Department of the Air Force U.S. Air Force Space Command Notice of Test AGENCY: U.S. Air Force Space Command... inform users of an upcoming event related to the GPS satellite constellation. U.S. Air Force Space... process L2C or L5 CNAV. U.S. Air Force Space Command ] expects to conduct one to two CNAV tests per...

  8. Death by a Thousand Cuts: Micro-Air Vehicles (MAV) in the Service of Air Force Missions

    DTIC Science & Technology

    2001-04-01

    exotic approaches as air suction/injection along the wing surface (which might require micro -valves and micro - pumps ), wall heat transfer, or...AU/AWC/___/2001-4 AIR WAR COLLEGE AIR UNIVERSITY DEATH BY A THOUSAND CUTS: MICRO -AIR VEHICLES (MAV) IN THE SERVICE OF AIR FORCE MISSIONS by...Dates Covered (from... to) - Title and Subtitle Death by a thousand Cuts: Micro -Air Vehicles (MAV) in the Service of Air Force Missions Contract

  9. Energy Efficiency Upgrades for Little Rock Air Force Base

    SciTech Connect

    Goldman, C.; Dunlap, M.A.

    2000-11-13

    Little Rock Air Force Base (LRAFB), in partnership with the local utility, Entergy Services, Inc., has reduced energy costs and used savings from investments in high-efficiency equipment to maintain and improve the condition of base housing and other facilities. Three projects were completed, with over $10 million invested. Major accomplishments include replacing air-to-air heat pumps with high-efficiency ground-source heat pumps (GSHPs) in more than 1,500 base housing units, lighting modifications to 10 buildings, upgrade of HVAC equipment in the base's enlisted club, and energy-efficient lighting retrofits for LRAFB's flight simulator.

  10. Forced convection heat transfer to air/water vapor mixtures

    NASA Technical Reports Server (NTRS)

    Richards, D. R.; Florschuetz, L. W.

    1986-01-01

    Heat transfer coefficients were measured using both dry air and air/water vapor mixtures in the same forced convection cooling test rig (jet array impingement configurations) with mass ratios of water vapor to air up to 0.23. The primary objective was to verify by direct experiment that selected existing methods for evaluation of viscosity and thermal conductivity of air/water vapor mixtures could be used with confidence to predict heat transfer coefficients for such mixtures using as a basis heat transfer data for dry air only. The property evaluation methods deemed most appropriate require as a basis a measured property value at one mixture composition in addition to the property values for the pure components.

  11. Variations in the normal and tangential momentum accommodation coefficients from analysis of atmospheric lift and drag forces on ANS-1 (1974-70A)

    NASA Astrophysics Data System (ADS)

    Moore, P.; Sowter, A.

    Studies of aerodynamic lift and drag in hyperthermal free molecular flow regimes usually adopt Schamberg's model for gas-surface interaction, utilising the thermal accommodation coefficient. Most authors assume near-diffuse reflection characteristics with constant re-emission speed for all angles of incidence. For modelling atmospheric forces a more natural approach is to utilise normal and tangential momentum coefficients, σ1 and σ respectively. Experimental laboratory data has yielded qualitatively the dependence on the angle of incidence which to good approximation can be represented as ω ≜ ω ' 0,ω 1≜ ∑ω01 - &lim&ω11 sec ɛi where σ0, σ10 and σ1l are constants and ξi is the angle subtended between the incident flow and the surface normal. Adopting these relationships the effects of atmospheric lift on the satellite inclination, i, and atmospheric drag on the semi-major axis, a, and eccentricity, e, have been investigated. Applications to ANS1 (1974-70A) show that the observed perturbation in i can be ascribed to non-zero σ1l whilst perturbations in a and e produce a constraint equation between the three parameters. Present address: GEC-MARCONI RESEARCH CENTRE, CHELMSFORD, U.K.

  12. Air Force Intercontinental Ballistic Missile Fuze Modernization (ICBM Fuze Mod)

    DTIC Science & Technology

    2015-12-01

    Selected Acquisition Report (SAR) RCS: DD-A&T(Q&A)823-498 Air Force Intercontinental Ballistic Missile Fuze Modernization (ICBM Fuze Mod) As of FY...Executive Officer PM - Program Manager POE - Program Office Estimate RDT&E - Research, Development, Test, and Evaluation SAR - Selected Acquisition Report

  13. A Consumer Evaluation of Air Force Food Service

    DTIC Science & Technology

    1974-07-01

    unrounded data is indicated in parentheses in this and the following tables. 11 Table 3 presents the Air Force consumers ’ preferences for cuisine or...RECOMMENDATIONS The reader should bear in mind that the following statements are made solely to reflect the consumers ’ preferences . Words like "must

  14. 33. Site Plan: Custer Air Force Station, Battle Creek, Michigan, ...

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

    33. Site Plan: Custer Air Force Station, Battle Creek, Michigan, FD Radar Facilities-FPS-27, Electrical Plot Plan and Duet Details, USACOE, not date. - Fort Custer Military Reservation, P-67 Radar Station, .25 mile north of Dickman Road, east of Clark Road, Battle Creek, Calhoun County, MI

  15. Analysis of Air Force Civil Engineering Strategic Planning

    DTIC Science & Technology

    2003-06-01

    Several organizations within the Department of Defense, including the Air Force Civil Engineer, are actively engaged in strategic planning in an...effort to create a roadmap for future capabilities and performance. The objective of this research was to analyze the strategic planning process of the

  16. Advanced Bio-Energy Systems for Air Force Installations.

    DTIC Science & Technology

    1981-10-01

    This investigation was sponsored by the US Air Force to determine the potential of using innovative biomass energy conversion technology interface...base environment before full implementation is possible. The investigation found that a biomass energy island system could be achieved through a

  17. Information Assurance within the United States Air Force

    ERIC Educational Resources Information Center

    Cherry, John D.

    2010-01-01

    According to the Department of Defense (DoD), a review of information assurance (IA) in the United States Air Force (USAF) in 2009, cyber security is jeopardized because of information loss. This situation has occurred in large part because of less than optimal training practices or adherence to training protocols. The purpose of this study was…

  18. Training augmentation device for the Air Force satellite Control Network

    NASA Technical Reports Server (NTRS)

    Shoates, Keith B.

    1993-01-01

    From the 1960's and into the early 1980's satellite operations and control were conducted by Air Force Systems Command (AFSC), now Air Force Materiel Command (AFMC), out of the Satellite Control Facility at Onizuka AFB, CA. AFSC was responsible for acquiring satellite command and control systems and conducting routine satellite operations. The daily operations, consisting of satellite health and status contacts and station keeping activities, were performed for AFSC by a Mission Control Team (MCT) staffed by civilian contractors who were responsible for providing their own technically 'qualified' personnel as satellite operators. An MCT consists of five positions: mission planner, ground controller, planner analyst, orbit analyst, and ranger controller. Most of the training consisted of On-the-Job-Training (OJT) with junior personnel apprenticed to senior personnel until they could demonstrate job proficiency. With most of the satellite operators having 15 to 25 years of experience, there was minimal risk to the mission. In the mid 1980's Air Force Space Command (AFSPACOM) assumed operational responsibility for a newly established control node at Falcon AFB (FAFB) in CO. The satellites and ground system program offices (SPO's) are organized under AFSC's Space and Missiles Systems Center (SMC) to function as a systems engineering and acquisition agency for AFSPACECOM. The collection of the satellite control nodes, ground tracking stations, computer processing equipment, and connecting communications links is referred to as the Air Force Satellite Control Network (AFSCN).

  19. Forces Acting on a Ball in an Air Jet

    ERIC Educational Resources Information Center

    Lopez-Arias, T.; Gratton, L. M.; Zendri, G.; Oss, S.

    2011-01-01

    The forces acting on a ball in an air jet have been measured using simple equipment. Such measurements allow quite a precise, non-ambiguous description and understanding of the physical mechanism which explains the famous levitating ball experiment. (Contains 7 figures.)

  20. How DLA’s Supply Performance Affects Air Force Readiness

    DTIC Science & Technology

    1990-10-01

    used by the Air Force, Navy, and Army, as well) are described in a paper by Victor J. Presutti, Jr., and Richard C. Trepp , "More Ado About Economic...how wholesale safety-level requirements for consumables were to be computed. The basic approach of the Presutti/ Trepp method is to minimize ordering

  1. Air Force Commander’s Guide to Diversity and Inclusion

    DTIC Science & Technology

    2015-01-01

    searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments...language abilities, physical abilities, philosophical/spiritual perspectives, age, race, ethnicity, and gender . 2 How Does the Air Force Define...characteristics, including age, race/ ethnicity, religion, gender , socioeconomic status, family status, disability, and geographic origin ■ cognitive/behavioral

  2. Academic Integrity at the United States Air Force Academy

    ERIC Educational Resources Information Center

    Derby, LeAnn

    2006-01-01

    In troubled times, where threats to honor abound, it is essential that people support students who may have been enculturated in social dishonesty. The United States Air Force Academy (USAFA) has worked hard to put in place a number of supports to help cadets to grow beyond social norms where dishonesty may be tolerated. The academy seeks to…

  3. Air Force Officer Qualifying Test Form O: Development and Standardization.

    ERIC Educational Resources Information Center

    Rogers, Deborah L.; And Others

    This report presents the rationale, development, and standardization of the Air Force Officer Qualifying Test (AFOQT) Form O. The test is used to select individuals for officer commissioning programs, and candidates for pilot and navigator training. Form O contains 380 items organized in 16 subtests. All items are administered in a single test…

  4. Fear of flying: an Israeli Air Force short case report.

    PubMed

    Rabinowitz, S; Hess, A

    1984-04-01

    This paper outlines the brief psychological treatment of an Israel Air Force pilot presenting with the fear of flying disorder. An in-depth case report is described and a variety of issues are discussed, including presentation of symptoms and psychotherapeutic techniques utilized, as well as the complicated role of the Mental Health Officer treating the problem within the military system.

  5. Post-Service Utilization of Air Force-Gained Skills.

    ERIC Educational Resources Information Center

    Winkler, Anthony J.; Thompson, Paul D.

    More complete information is needed to determine the extent of utilization in the civilian economy of skills developed during military service. Post-service occupation data have been obtained through a questionnaire mailed ten months after separation to each first-term Air Force enlisted man separated between 1 July 1968 and 31 March 1970. As of…

  6. Risk and Resilience in Deployed Air Force Medical Personnel Study

    DTIC Science & Technology

    2011-09-15

    understand how different types and levels of stress exposure relate to positive and negative mental health outcomes among military medical personnel, the...associations between combat and healthcare stress exposure and posttraumatic growth and posttraumatic stress disorder (PTSD) were examined among 253...Air Force medical personnel recently redeployed from Iraq. Both types of stress exposure were uniquely associated with increased PTSD symptomatology

  7. How the Air Force Trains Its Biomedical Equipment Technicians

    ERIC Educational Resources Information Center

    Raynor, Richard R.

    1976-01-01

    Reports on the U.S. Air Force method of training biomedical equipment technicians. The 50 self-paced modules that make up the course are randomly sequenced to reduce capital investment in training equipment. Other useful bits of information from the military are included in this article. (Editor/HD)

  8. Communication Theory and Research in Air Force Education and Training.

    ERIC Educational Resources Information Center

    Kline, John A.

    The United States Air Force is unique among the armed services in placing all its professional military education (PME) and professional continuing education (PCE) under a single command. Furthermore, most of the schools and courses are in the same geographical location at the Maxwell/Gunter complex in Montgomery, Alabama. There are basic…

  9. 34. Site Plan: Fort Custer Air Force Station, Fort Custer, ...

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

    34. Site Plan: Fort Custer Air Force Station, Fort Custer, Michigan, Modification of Electrical Distribution, General Site Plan, USACOE, no date. - Fort Custer Military Reservation, P-67 Radar Station, .25 mile north of Dickman Road, east of Clark Road, Battle Creek, Calhoun County, MI

  10. Air Force Research Initiation Program. 1986 Technical Report. Volume 3

    DTIC Science & Technology

    1988-04-01

    at Orono Jackson State University Specialty: Mathematical Statistics Specialty: Educational Psychology WILFORD HALL MEDICAL CENTER (Lackland Air Force...had a considerable 71-5 practical experience in applied research , administration, teaching and pedagogy, athletics and coaching, psychology , and...of facts and the frontier method preferred for procedural skills that have prerequisite relations. Second , once a topic, or more particularly a

  11. Connecting United States Air Force Core Values to Mission Accomplishment

    DTIC Science & Technology

    2014-06-04

    Resolution, 6 June 2012. Air Force Instruction (AFI) 91-204. Safety Investigations and Reports, 24 September 2008. Ajzen , Icek . “The Theory of...they should act versus the way people actually act ( Ajzen , 1991). Culture, environmental factors, individual factors, and psychological mechanisms

  12. Exploratory Inquiry: Disparate Air Force Base Area Network Architectures

    DTIC Science & Technology

    2005-03-01

    Lieutenant Jamie Sharkey conducted a thesis on the key issues pertaining to Air Force enterprise architecture management. Discussion of...experience in fixed and tactical communications. His first duty station was McGuire AFB, New Jersey followed by assignments to Spangdahlem AB, Germany; the

  13. STS-66 landing at Edwards Air Force Base

    NASA Technical Reports Server (NTRS)

    1994-01-01

    The main landing gear is on the ground and the nose gear is about to touch down as the Space Shuttle Atlantis heads toward a stop at Edwards Air Force Base in southern California, ending a successful 10 day, 22 hour and 34 minute space mission. Landing occured at 7:34 a.m. (PST), November 14, 1994.

  14. Understanding Country Planning: A Guide for Air Force Component Planners

    DTIC Science & Technology

    2012-01-01

    execution and can help deconflict activities as necessary. Many Air Force components and most Security Assistance Organizations maintain a calendar ...on various Earth-based experiments and in the provision of ground station support to such initiatives as Japan’s Kaguya lunar mission.22 In addition

  15. Final Creech Air Force Base Capital Improvements Program Environmental Assessment

    DTIC Science & Technology

    2013-11-01

    maintain operational mission such as emergency power, check valves, heating and air conditioning units, force protection, under-wing foam system ...Repair Fire Alarm System , Building 2 Airfield LKTC141030 Construct Drainage Culverts Along Road Utility LKTC141031 Replace Heat Pump, Building 234...Polychlorinated Biphenyl (PCB) — a synthetic, organic chemical once widely used in electrical equipment, specialized hydraulic systems , heat transfer

  16. Personality Differences Among Men In Selected Air Force Specialties

    ERIC Educational Resources Information Center

    Wigington, John H.; Apostal, Robert A.

    1973-01-01

    The results of the analyses of variance indicate that differences exist among the examined Air Force specialties on four VPI scales; realistic intellectual self-control, and status. These results might be considered by school, college, and military counselors in their vocational counseling of prospective and enlisted airmen. (Author)

  17. Parenting Attitudes of Expectant Couples Associated with the Air Force

    DTIC Science & Technology

    1992-05-01

    orientation classes or the prepared child birth classes at two Air Force bases in the southwest. The instrument was the Adult- Adolescent Parenting Inventory...REFERENCES ........................................... 47 APPENDIX A Adult- Adolescent Parenting Inventory, Form A and B, Profile Worksheet...expectant military couples as measured by the Adult- Adolescent Parenting Inventory (AAPI) (Bavolek, 1984). Research Ouestions 1. What are the parenting

  18. Depression and burnout symptoms among Air Force family medicine providers.

    PubMed

    Varner, Derrick F; Foutch, Brian K

    2014-05-01

    This study investigated the prevalence of depression and burnout symptoms among family medicine providers on active duty in the US Air Force. Results demonstrated that 84% of those surveyed scored positive for degrees of depression symptoms; only sex differences were significant.

  19. Strategic Airpower Elements in Interwar German Air Force Doctrine

    DTIC Science & Technology

    2001-06-01

    Hellmuth Felmy developed a study to support the mobilization of a 21-division army. The Air Force was to comprise 80 squadrons, 42 of which were to be...General Felmy developed the Concentrated Aircraft Procurement Program on 7 November 1938, which was approved by Colonel Hans Jeschonnek, the Chief of

  20. Prevalence of Careerism among U.S. Air Force Officers

    DTIC Science & Technology

    1989-01-01

    1978), 18. 16. Bruce W. Tuckman , "Getting at the Attitudes Problem: Career Development and the Affective Domain," in 90 Career Education: A Lifelong...Hypercareerism. ............................ 16 Measurement of Attitudes................... 17 A Linking Model ............................ 19 Notes... Model with Examples ........... 19 Table 1 Sample Distribution for 1985 Air Force Computer-Assisted Telephone Interview Prototype

  1. United States Air Force Statistical Digest 1947, Second Annual Number

    DTIC Science & Technology

    1948-08-01

    those personnel chargeable to the Air Force Troop Bases. The tables are based on audited and coordinated data and in all eeeee the htest available...96 442 344 98 482 384 98 Sgt • , . 947 819 128 855 694 161 858 684 174 827 654 173 Cpl. . 665 544 121 482 347 135 413 305 108 380 280 100 Pfe • . 202

  2. Environmental Assessment: Military Family Housing Privatization Maxwell Air Force Base

    DTIC Science & Technology

    2005-06-01

    Water Resources) Montgomery Chamber of Commerce George , Randall (President) Montgomery County – City Public Library Montgomery County...Force Base Personnel, Interviewer; Tamara Carroll. Zervos , Spero G. 2001. A Brief History of Maxwell AFB. Maxwell AFB, AL: Air University History...35486- 6999 205-247-3589 Montgomery Chamber of Commerce President Randall George 41 Commerce Street Montgomery, AL 36101 PO Box 79 Montgomery, AL

  3. Bioventing Field Initiative at Robins Air Force Base, Georgia

    DTIC Science & Technology

    2007-11-02

    This report describes the activities conducted at three sites at Robins Air Force Base (AFB), Georgia, as part of the Bioventing Field initiative for...respiration test, and installation of a bioventing system. The specific objectives of this task are described in the following section. The test sites at the

  4. Numerical modelling of the turbulent flow developing within and over a 3-d building array, part iii: a istributed drag force approach, its implementation and application

    NASA Astrophysics Data System (ADS)

    Lien, Fue-Sang; Yee, Eugene

    A modified k- model is used for the simulation of the mean wind speed and turbulence for a neutrally-stratified flow through and over a building array, where the array is treated as a porous medium with the drag on the unresolved buildings in the array represented by a distributed momentum sink. More specifically, this model is based on time averaging the spatially averaged Navier-Stokes equation, in which the effects of the obstacle-atmosphere interaction are included through the introduction of a distributed mean-momentum sink (representing drag on the unresolved buildings in the array). In addition, closure of the time-averaged, spatially averaged Navier-Stokes equation requires two additional prognostic equations, namely one for the time-averaged resolved-scale kinetic energy of turbulence,, and another for its dissipation rate, . The performance of the proposed model and some simplified versions derived from it is compared with the spatially averaged, time-mean velocity and various spatially averaged Reynolds stresses diagnosed from a high-resolution computational fluid dynamics (CFD) simulation of the flow within and over an aligned array of sharp-edged cubes with a plan area density of 0.25. Four different methods for diagnosis of the drag coefficient CDfor the aligned cube array, required for the volumetric drag force representation of the cubes, are investigated here. We found that the model predictions for mean wind speed and turbulence in the building array were not sensitive to the differing treatments of the source and sink terms in the and equations (e.g., inclusion of only the `zeroth-order'' approximation for the source/sink terms compared with inclusion of a higher-order approximation for the source/sink terms in the and equations), implying that the higher-order approximations of these source/sink terms did not offer any predictive advantage. A possible explanation for this is the utilization of the Boussinesq linear stress-strain constitutive

  5. Elevations. March Air Force Base, Riverside, California, Combat Operations Center, ...

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

    Elevations. March Air Force Base, Riverside, California, Combat Operations Center, Combat Operations Building. By Moffatt and Nichol, Engineers, 122 West Fifth Street, Long Beach, California; for the Corps of Engineers, U.S. Army, Office of the District Engineer, Los Angeles, California. Drawing no. AW-60-02-03, sheet no. 14, approved March, 1962; specifications no. ENG-04-353-62-66; D.O. series AW 1596/14, Rev. "B"; file drawer 77-1/102. Last revised 3 October 1966. Scale one-eighth inch to one foot. 30x36 inches. photocopy on paper - March Air Force Base, Strategic Air Command, Combat Operations Center, 5220 Riverside Drive, Moreno Valley, Riverside County, CA

  6. Sections. March Air Force Base, Riverside, California, Combat Operations Center, ...

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

    Sections. March Air Force Base, Riverside, California, Combat Operations Center, Combat Operations Building. By Moffatt and Nichol, Engineers, 122 West Fifth Street, Long Beach, California; for the Corps of Engineers, U.S. Army, Office of the District Engineer, Los Angeles, California. Drawing no. AW-60-02-03, sheet no. 14, approved March, 1962; specifications no. ENG-04-353-62-66; D.O. series AW 1596/15, Rev. "A"; file drawer 1290. Last revised 3 October 1966. Scale one-eighth inch to one foot. 30x36 inches. pencil on paper - March Air Force Base, Strategic Air Command, Combat Operations Center, 5220 Riverside Drive, Moreno Valley, Riverside County, CA

  7. Process to manufacture effervescent tablets: air forced oven melt granulation.

    PubMed

    Yanze, F M; Duru, C; Jacob, M

    2000-12-01

    In the present study we apply melt granulation in an air forced oven, called "are forced oven melt granulation" to the single-stage manufacture of effervescent granules consisting of anhydrous citric acid (43.2%) and sodium bicarbonate (56.8%) in order to make tablets. This study established that process parameters such as concentration of PEG 6000, residence time in the air forced oven, fineness of PEG 6000, fineness of the initial effervescent mix and efficiency of two lubricants markedly influenced several granule and tablet characteristics. The granules ready to be compressed into tablets were stable for 7 days at 60% RH/18 degrees C. It is a dry, simple, rapid, effective, economical, reproducible process particularly well suited to the manufacture of effervescent granules which are easily compressed into effervescent tablets. Of all the formulations tested, only formulations B2 and E2 melt granulated for 30 minutes gave tablets which had optimum compression characteristics without processing problems during compression.

  8. Spectral Longwave Cloud Radiative Forcing as Observed by AIRS

    NASA Technical Reports Server (NTRS)

    Blaisdell, John M.; Susskind, Joel; Lee, Jae N.; Iredell, Lena

    2016-01-01

    AIRS V6 products contain the spectral contributions to Outgoing Longwave Radiation (OLR), clear-sky OLR (OLR(sub CLR)), and Longwave Cloud Radiative Forcing (LWCRF) in 16 bands from 100 cm(exp -1) to 3260 cm(exp -1). We show climatologies of selected spectrally resolved AIRS V6 products over the period of September 2002 through August 2016. Spectrally resolved LWCRF can better describe the response of the Earth system to cloud and cloud feedback processes. The spectral LWCRF enables us to estimate the fraction of each contributing factor to cloud forcing, i.e.: surface temperature, mid to upper tropospheric water vapor, and tropospheric temperature. This presentation also compares the spatial characteristics of LWCRF from AIRS, CERES_EBAF Edition-2.8, and MERRA-2. AIRS and CERES LWCRF products show good agreement. The OLR bias between AIRS and CERES is very close to that of OLR(sub CLR). This implies that both AIRS and CERES OLR products accurately account for the effect of clouds on OLR.

  9. 33 CFR 334.700 - Choctawhatchee Bay, aerial gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla. 334.700 Section 334.700 Navigation and... RESTRICTED AREA REGULATIONS § 334.700 Choctawhatchee Bay, aerial gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla. (a) The danger zones—(1) Aerial gunnery range in west part of Choctawhatchee...

  10. 33 CFR 334.700 - Choctawhatchee Bay, aerial gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla. 334.700 Section 334.700 Navigation and... RESTRICTED AREA REGULATIONS § 334.700 Choctawhatchee Bay, aerial gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla. (a) The danger zones—(1) Aerial gunnery range in west part of Choctawhatchee...

  11. 33 CFR 334.700 - Choctawhatchee Bay, aerial gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla. 334.700 Section 334.700 Navigation and... RESTRICTED AREA REGULATIONS § 334.700 Choctawhatchee Bay, aerial gunnery ranges, Air Armament Center, Eglin Air Force Base, Fla. (a) The danger zones—(1) Aerial gunnery range in west part of Choctawhatchee...

  12. Air Force Sustainment Center Logistics and Sustainment Enterprise 2040. Version 2.0

    DTIC Science & Technology

    2016-04-15

    maintenance operations. f) Minimizing water contaminants, air pollutants /emissions, noise pollution , and hazardous waste streams to improve the...US AIR FORCE Distribution A. Approved for Public Release; Distribution Unlimited (72ABW-2015-0046), Air Force Sustainment Center 15...April 2016 i Foreword The Air Force Sustainment Center (AFSC) continues to make great gains toward achieving the Art of the Possible

  13. 32 CFR 806.29 - Administrative processing of Air Force FOIA requests.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 6 2012-07-01 2012-07-01 false Administrative processing of Air Force FOIA... FORCE ADMINISTRATION AIR FORCE FREEDOM OF INFORMATION ACT PROGRAM § 806.29 Administrative processing of Air Force FOIA requests. (a) This section is a checklist format of processing steps and...

  14. 32 CFR 806.29 - Administrative processing of Air Force FOIA requests.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 6 2011-07-01 2011-07-01 false Administrative processing of Air Force FOIA... FORCE ADMINISTRATION AIR FORCE FREEDOM OF INFORMATION ACT PROGRAM § 806.29 Administrative processing of Air Force FOIA requests. (a) This section is a checklist format of processing steps and...

  15. 32 CFR 806.29 - Administrative processing of Air Force FOIA requests.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 6 2013-07-01 2013-07-01 false Administrative processing of Air Force FOIA... FORCE ADMINISTRATION AIR FORCE FREEDOM OF INFORMATION ACT PROGRAM § 806.29 Administrative processing of Air Force FOIA requests. (a) This section is a checklist format of processing steps and...

  16. 32 CFR 806.29 - Administrative processing of Air Force FOIA requests.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 6 2010-07-01 2010-07-01 false Administrative processing of Air Force FOIA... FORCE ADMINISTRATION AIR FORCE FREEDOM OF INFORMATION ACT PROGRAM § 806.29 Administrative processing of Air Force FOIA requests. (a) This section is a checklist format of processing steps and...

  17. 32 CFR 806.29 - Administrative processing of Air Force FOIA requests.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 6 2014-07-01 2014-07-01 false Administrative processing of Air Force FOIA... FORCE ADMINISTRATION AIR FORCE FREEDOM OF INFORMATION ACT PROGRAM § 806.29 Administrative processing of Air Force FOIA requests. (a) This section is a checklist format of processing steps and...

  18. Capturing Non-Linear Battlefield Operations: Conventional Air Forces’ Interdependence with Special Operations Forces

    DTIC Science & Technology

    2005-06-01

    COMBAT HOURS. MAJOR CIHAK IS MARRIED TO PATRICIA ( PATTI ) AND THEY CURRENTLY RESIDE IN MONTGOMERY, ALABAMA WITH THEIR FIVE CHILDREN; HEATHER (16...MY OWN CAREER. BORN AND RAISED ON THE GROUND , I GREW WINGS, BUT NEVER FORGOT WHERE MY ROOTS DEVELOPED. AS I RESEARCHED AND BEGAN TO BETTER...UNMANNED AERIAL VEHICLES AND FORGING TIGHT LINKS BETWEEN SATELLITES, PILOTS IN THE AIR, SPECIAL FORCES ON THE GROUND , AND LAND FORCE COMMANDERS TO RAPIDLY

  19. United States Air Force Graduate Student Research Program. 1989 Program Management Report

    DTIC Science & Technology

    1989-12-01

    research at Air Force laboratories /centers. Each assignment is in a subject area and at an Air Force facility mutually agreed upon by the...housing difficult to find, c) 10 weeks too short for research period. June 20, 1989 Astronautics Laboratory Edwards Air Force Base, California June 21...1989 HRL: Operations Training Division Williams Air Force Base, Arizona June 22, 1989 Weapons Laboratory Kirtland Air

  20. Cultural Themes in Messages from Top Air Force Leaders, 2005-2008

    DTIC Science & Technology

    2010-01-01

    or monuments; or overall contributions of the Air Force to wars. Exclusion Criteria : 3. random history dates for the Air Force. Only history or...fly and fight in Air, Space, and Cyberspace. Exclusion Criteria :3. any statement citing the Air Force Vision (discussed later), statements focused... Exclusion Criteria :3. Air Force mission coding, context focusing on achieving a goal as opposed to plans for achieving future goals, current operations

  1. The contraction of satellite orbits under the influence of air drag. Part 7: Orbits of high eccentricity, with scale height dependent on altitude

    NASA Astrophysics Data System (ADS)

    King-Hele, D. G.; Walker, Doreen M. C.

    1986-02-01

    Part 3 of this series of papers developed the theory of high-eccentricity orbits (e greater than 0.2) in an atmosphere having an exponential variation of air density with height, that is, with the density scale height H taken as constant. Part 4 derived the appropriate theory for low-eccentricity orbits (e less than 0.2) in a more realistic atmosphere where H varies linearly with height y (and mu = dH/dy less than 0.2). The present report treats the orbits of Part 3 when they meet the air drag specified by the atmospheric model of Part 4. Equations are derived showing how the perigee height varies with eccentricity, and the eccentricity varies with time, over the major part of the satellite's life. It is shown that the theory of Part 3 remains valid, to order mu sq, if H is evaluated at a specific height above perigee.

  2. Forced-air patient warming blankets disrupt unidirectional airflow.

    PubMed

    Legg, A J; Hamer, A J

    2013-03-01

    We have recently shown that waste heat from forced-air warming blankets can increase the temperature and concentration of airborne particles over the surgical site. The mechanism for the increased concentration of particles and their site of origin remained unclear. We therefore attempted to visualise the airflow in theatre over a simulated total knee replacement using neutral-buoyancy helium bubbles. Particles were created using a Rocket PS23 smoke machine positioned below the operating table, a potential area of contamination. The same theatre set-up, warming devices and controls were used as in our previous study. This demonstrated that waste heat from the poorly insulated forced-air warming blanket increased the air temperature on the surgical side of the drape by > 5°C. This created convection currents that rose against the downward unidirectional airflow, causing turbulence over the patient. The convection currents increased the particle concentration 1000-fold (2 174 000 particles/m(3) for forced-air warming vs 1000 particles/m(3) for radiant warming and 2000 particles/m(3) for the control) by drawing potentially contaminated particles from below the operating table into the surgical site. Cite this article: Bone Joint J 2013;95-B:407-10.

  3. Innovating to integrate the intangibles into the learning Air Force.

    PubMed

    Hazen, Benjamin T; Weigel, Fred K; Overstreet, Robert E

    2014-01-01

    United States federal law and other regulations require the US military services to provide professional military education to their forces. Meeting that requirement will become increasingly difficult with the absence of a federal government budget, significant cuts to defense spending, and expected future cuts to both defense spending and manpower. Additionally, the operations tempo remains high despite the withdrawal of troops from Iraq and the planned withdrawal from Afghanistan. The resulting time and budget constraints will likely make it more difficult for the services to provide every member with the opportunity to compete for positions in coveted in-residence professional military education programs. Thus, the Air Force is considering a new lifetime learning approach to professional military education. As the Air Force seeks to develop its new paradigm, we must understand what benefits of the current system should be retained and what drawbacks should be allayed. Unfortunately, there is little research in this area. We content analyze data collected from Air Force officers attending in-residence professional military education, synthesize our findings with education and technology literature, and suggest innovative technologies that can maximize the intangible benefits and minimize the drawbacks of professional military education. The blended approach we present can create a richer, more meaningful learning experience for the service member, while simultaneously lowering the cost per member and providing greater opportunity to attend in-residence professional military education.

  4. When superfluids are a drag

    SciTech Connect

    Roberts, David C

    2008-01-01

    The article considers the dramatic phenomenon of seemingly frictionless flow of slow-moving superfluids. Specifically the question of whether an object in a superfluid flow experiences any drag force is addressed. A brief account is given of the history of this problem and it is argued that recent advances in ultracold atomic physics can shed much new light on this problem. The article presents the commonly held notion that sufficiently slow-moving superfluids can flow without drag and also discusses research suggesting that scattering quantum fluctuations might cause drag in a superfluid moving at any speed.

  5. Air Force Civil Engineer, Volume 11, Number 4, Winter 2003

    DTIC Science & Technology

    2003-01-01

    and MSgt Paul Fazzini, AMC/PA, Scott AFB, Ill. Above: Members of the 615th Air Mobility Squadron, Travis AFB, Calif., erect tents on Naval Air...Col Jeffrey Pitchford , commander of the 16th CES, at Aviano AB, Italy. Both were members of the advance on-site team sent to Diyarbakir to do initial...joined Lt Col Pitchford and SMSgt Dewar in Diyarbakir. They were the first CE forces at the Diyarbakir site, arriving in mid-February to begin their

  6. Transportation Costs as a Consideration in Air Force Contracts.

    DTIC Science & Technology

    1979-03-10

    46556 _______________________ II. CONTROLLING OFFICE NAME AND ADDR ESS 12. REPORT DATE .4 - . 79Mar 10 AIR _~~~~~~~~~~ ØJSIN~~S RESEARC~1 MANN3~ 4~NT...these costs be understood and controlled . Many transportation decisions are made by the con trac tor under F.O.B. destination contracts versus those...imperative therefore , that these costs be understood and controlled . Like many business organiza tions , the United States Air Force faces problems of

  7. China’s Air Force Enters the 21st Century.

    DTIC Science & Technology

    1995-01-01

    CHINA’S AIR FORCE ENTERS TH E 21ST CENTURY KENNETH W ALLEN GLENN KRÜMEL JONATHAN D. POLLACK P»T«BTOON~ STATEMENT X | ÄBpicrce< i ioi...references. ISBN 0-8330-1648-2 (all;, paper) 1. China. Chung-kuo jen min chieh fang chiin. K’ungchiin. 2. Air power—China. I ...Accesion For NTIS CRA& I DTIC TAB Unannounced Justification By Distribution / i D D Availability Codes Dist M Avail and/or Special

  8. Final Environmental Assessment for Force Structure Changes at Langley Air Force Base, VA

    DTIC Science & Technology

    2011-10-01

    Shepard Blvd, Hampton, VA, 23665, DEQ PC No. 20095002, PC Case Status - Release Confirmed, Case Closed. Langley Air Force Base- Building 333, 90 Oak...NOISEXPO ‘77, Chicago , IL. March. White, R. 1972. Effects of Repetitive Sonic Booms on Glass Breakage. FAA Report FAA-RD-72- 43. April. 6

  9. Basewide environmental baseline survey, Reese Air Force Base, Texas

    SciTech Connect

    1996-11-26

    This Environmental Baseline Survey (EBS) has been prepared to document the environmental condition of real property at Reese Air Force Base (AFB), Texas, resulting from the storage, release, and disposal of hazardous substances and petroleum products and their derivatives over the installation`s history. Although primarily a management tool, this EBS is also used by the Air Force to meet its obligations under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), 42 U.S. Code Section 9620(h), as amended by the Community Environmental Response Facilitation Act (CERFA) (Public Law 102-426). Table ES-1 lists all Category 1 uncontaminated property associated with Reese AFB based on information obtained through a records search, interviews, and visual inspections at Reese AFB and Figures ES-1a and ES-1b depict their locations.

  10. Eielson Air Force Base Operable Unit 2 baseline risk assessment

    SciTech Connect

    Lewis, R.E.; Jarvis, T.T.; Jarvis, M.R.; Whelan, G.

    1994-10-01

    Operable Unit 2 at Eielson Air Force Base (AFB) near Fairbanks, is one of several operable units characterized by petroleum, oil, and lubricant contamination, and by the presence of organic products floating at the water table, as a result of Air Force operations since the 1940s. The base is approximately 19,270 acres in size, and comprises the areas for military operations and a residential neighborhood for military dependents. Within Operable Unit 2, there are seven source areas. These source areas were grouped together primarily because of the contaminants released and hence are not necessarily in geographical proximity. Source area ST10 includes a surface water body (Hardfill Lake) next to a fuel spill area. The primary constituents of concern for human health include benzene, toluene, ethylbenzene, and xylenes (BTEX). Monitored data showed these volatile constituents to be present in groundwater wells. The data also showed an elevated level of trace metals in groundwater.

  11. A Conceptual Design for the Cost Evaluation of Alternative Educational Systems in Managing the Air Force Academy and Air Force ROTC.

    ERIC Educational Resources Information Center

    Judy, Richard W.; And Others

    The authors investigated the feasibility of desiging cost/benefit, or cost effectiveness models for two alternative organizations within United States Air Force: the United States Air Force Academy and the Reserve Officer Training Corps of Air University. On the basis of the situation analyses, two cost simulation models for both institutions were…

  12. Electro-hydrodynamic force field and flow patterns generated by a DC corona discharge in the air

    NASA Astrophysics Data System (ADS)

    Monrolin, Nicolas; Plouraboue, Franck; Praud, Olivier

    2016-11-01

    Ionic wind refers to the electro-convection of ionised air between high voltage electrodes. Microscopic ion-neutral collisions are responsible for momentum transfer from accelerated ions, subjected to the electric field, to the neutral gas molecules resulting in a macroscopic airflow acceleration. In the past decades it has been investigated for various purposes from food drying through aerodynamic flow control and eventually laptop cooling. One consequence of air acceleration between the electrodes is thrust generation, often referred to as the Biefeld-Brown effect or electro-hydrodynamic thrust. In this experimental study, the ionic wind velocity field is measured with the PIV method. From computing the acceleration of the air we work out the electrostatic force field for various electrodes configurations. This enables an original direct evaluation of the force distribution as well as the influence of electrodes shape and position. Thrust computation based on the flow acceleration are compared with digital scale measurements. Complex flow features are highlighted such as vortex shedding, indicating that aerodynamic effects may play a significant role. Furthermore, the aerodynamic drag force exerted on the electrodes is quantified by choosing an appropriate control volume. Authors thank Region Midi-Pyrenee and CNES Launcher Directorate for financial support.

  13. Environmental Assessment: Installation Development at Sheppard Air Force Base, Texas

    DTIC Science & Technology

    2007-05-01

    Branch) US Fish and Wildlife Service Carter, Patricia (NEPA Program Coordinator) 6.2 STATE AGENCIES Federal Emergency Management Agency Fairley ...FORCEAIR EDU.CATION AND TRAINING COMMAND 82 CES/CEVX 231 9th Avenue Stop 201 Sheppard AFB TX 76311-3333 Donald Fairley Environmental Specialist...TRAINING COMMAND March 7, 2007 82 CES/CEVX 231 9th Avenue Stop 201 Sheppard AFB TX 76311-3333 Donald Fairley Environmental

  14. The United States Air Force Academy: A Bibliography: 1968 - 1972

    DTIC Science & Technology

    1972-09-01

    University of Denver, 1969. 209 1. (Spec. Coll. UGB 861 Z7) 34 PART XII GRADUATES AIR FORCE REGULATIONS 284 AFR 36-7. Legal education...Indoctrination 10355 Merit lists 10356 Organization 10330 Wing strength 10354 Marihuana incidents 10912 Marriage of cadet 10326...10417 Marihuana incidents 10912 Marine Corps and airman students being taught same course as midshipmen 10422 Medical school, graduates who enter

  15. Facility Requirements of the Air Force Avionics Laboratory. Revision,

    DTIC Science & Technology

    1979-05-01

    a dozen locations in Area B, Wright-Patterson Air Force Base, Ohio. The Base Master Plan proposes eventually to consolidate the Avionics Laboratory in...only. To reassess the requirement for the planned third increment of Building 620, the Commander of the Avionics Laboratory contracted with the...alternative is to take no action other than the moves now planned . The second alternative is to move the Commander, his immediate staff and the one

  16. Air Force Engineering and Services Laboratory Herbicide Orange Monitoring Program

    DTIC Science & Technology

    1984-04-01

    Air Force leaders with the latest available cata in the continuing environmental monitoring and evaluation studies at these critical sites... monitoring and evaluation studies ot areas on Johnston Island, the Naval Construction Battalion Center, and Eglin APB, previously used for the... and evaluation program by collecting samples from NCBC, JI, and Eglin AFB on a semiannual basis. This report summarizes the data on samples collected

  17. An Analysis of the Air Force Enlisted Performance Feedback System

    DTIC Science & Technology

    1992-09-01

    subjects giving and receiving the feedback from the various methods (DeGregorio and Fisher, 1988:605). The four types of techniques they studied in... receives some P.~ id~srn Hence, leadership gives support from upper-level ~potfo elw p no emphasis to a feedback management. Certain Io .a.........k...researchers’ analysis of the literature. The researchers found evidence that the new Air Force feedback system is an improvement over the old design. Under the

  18. Evolving Intelligence, Surveillance & Reconnaissance (ISR) for Air Force Cyber Defense

    DTIC Science & Technology

    2013-02-14

    articulated by Brigadier General Kevin Wooton , the Director of Communications and Information at Air Force Space Command, when he noted that...General Wooton , a career intelligence officer and former commander of the 67th Network Warfare Wing, is uniquely qualified to comment on the role...perspective for NASIC was also echoed during the interview with Brigadier General Wooton .43 The author envisions this would require between one

  19. U.S. Air Force Annual Financial Statement 2010

    DTIC Science & Technology

    2010-01-01

    equipment. The Air Force recognizes excess, obsolete, and unserviceable OM&S at a net realizable value of $0 pending development of an effective...Latest Acquisition Cost NRV = Net Realizable Value MAC = Moving Average Cost SP = Standard Price LCM = Lower of Cost or Market AC = Actual...S. The AFWCF recognizes excess, obsolete, and unserviceable inventory and OM&S at a net realizable value of $0 pending development of an

  20. Improving Air Force Enterprise Resource Planning-Enabled Business Transformation

    DTIC Science & Technology

    2013-01-01

    5. Business logistics—United States. 6. Reengineering (Management)—United States. I. Title. II. Title: Improving Air Force ERP -enabled business...transformation. UG633.2.R57 2013 358.4�—dc23 2013030449 - iii - Preface Enterprise Resource Planning ( ERP ) systems are configurable...of internal business activities, including procurement, accounting, finance, and human resources. ERP programs tend to be very large, involve a