This research investigated the effects of detailed speed and acceleration characteristics on energy consumption utilizing several fuel consumption models. The relationships between speed and acceleration characteristics, geometric characteristics (e.g., n...
National Technical Information Service (NTIS)
Some of the dynamic characteristics of the human body were analyzed and mathematical analogs that can be used to predict the response of the body to acceleration environments were developed. The background of the acceleration tolerance problem, the basic ...
... Title : Analysis of a Rail Gun Plasma Accelerator. ... Abstract : A model is developed to study the characteristics of an arc-driven rail gun. ...
DTIC Science & Technology
The accelerating gradient in a laser-driven dielectric accelerating structure is often limited by the laser damage threshold of the structure. For a given laser-driven dielectric accelerator design, we can maximize the accelerating gradient by choosing the best combination of the ...
Energy Citations Database
This research investigated the effects of detailed speed and acceleration characteristics on energy consumption utilizing several fuel consumption models. The relationships between speed and acceleration characteristics, geometric characteristics (e.g., number of lanes, ...
... of two parallel torpedo-like hulls. ... of Acceleration Hydrodynamic Coefficients for ... For Predicting Submersible Hydrodynamics Characteristics, NCSC ...
A model is developed to study the characteristics of an arc-driven rail gun. In particular, a system of equations is developed which provides a computationally efficient method for estimating the arc-projectile acceleration and the average thermodynamic p...
The study of the acceleration properties at the end effector is important in the analysis, design, and control of robot manipulators. In previous efforts aimed at addressing this problem, the end-effector acceleration has been treated as a vector combining both the linear and angular accelerations. The methodology presented in this ...
E-print Network
Characterizing the acceleration properties at the end effector is crucial for the analysis, design, and control of robot manipulators. In previous efforts aimed at addressing this problem, the end-effector acceleration has been treated as a vector combining both the linear and angular accelerations. The methodology presented in this ...
Possible models are discussed in which the radio emitting components in Seyfert II nuclei can compress and accelerate the ambient nuclear medium to produce the characteristics of the narrow line region. A first order model, which considers only the expans...
According to the work program and schedule there was developed the methodology of experiments on the discharge chamber material influence on the Hall thruster characteristics there was prepared Hall thruster model of the SPT- 100 type for these experiment...
Computational features are considered for the starting characteristics of asynchronous and rectifier machines that best meet the requirements imposed on the electric machines of kinetic energy accumulators. A mathematical model is given that describes the process of flywheel acceleration; methods for the solution of the equations of ...
A system for the measurement of aerodynamic forces and moments is developed, based mainly on acceleration. The modal analysis and the optimization of the model is done by finite element calculations. The check of the modal characteristics of the model is done by vibration tests and improvement of the finite element ...
NASA Astrophysics Data System (ADS)
Low-voltage accelerator models are described that can be used either for classroom demonstrations or for laboratory courses. Two types of circuit models are presented: (1) the Marx generator and (2) the Cockroft--Walton (ladder circuit). These low-voltage circuit models exhibit the basic ...
We study cosmological constraints on the various accelerating models of the universe using the time evolution of the cosmological redshift of distant sources. The important characteristic of this test is that it directly probes the expansion history of the universe. In this work we analyze the various models of the ...
Page 1. Procedures for Using the AMANDA Model in Acceleration ... September 2004 Procedures for Using the AMANDA Model in Acceleration ...
OpenMP [13] is the dominant programming model for shared-memory parallelism in C, C++ and Fortran due to its easy-to-use directive-based style, portability and broad support by compiler vendors. Similar characteristics are needed for a programming model for devices such as GPUs and DSPs that are gaining popularity to ...
DOE Information Bridge
The ditching characteristics of the space shuttle orbiter were examined. Tests were made with a 1/20-scale model in order to determine behavior patterns and accelerations imparted to the ditching vehicle. Ditchings were made with different configurations ...
A new facility has been constructed to measure the characteristic features of superconducting model magnets and cable at cryogenic temperatures--a function which supports the design and development process for building full-scale accelerator magnets. Ther...
A new facility has been constructed to measure the characteristic features of superconducting model magnets and cable at cryogenic temperatures -- a function which supports the design and development process for building full-scale accelerator magnets. Th...
Field stability and tuning are critically important for the design of any accelerator. The standing wave structure is under consideration for implementation in the Next Linear Collider. A 15-cavity standing wave accelerator structure was modeled with equivalent circuits in which nearest neighbor coupling was incorporated in the ...
Two independently-driven laser accelerators were operated together in series for the first time in a proof-of-principle experiment to demonstrate staging. The ability to stage together these devices is important for eventually building practical laser-driven accelerators. The laser accelerators consisted of two identical inverse free ...
Two investigations were conducted in the Langley 14 by 22 Foot Subsonic Tunnel to determine the low-speed aerodynamic characteristics of a generic hypersonic accelerator-type configuration. The model was a delta wing configuration incorporating a conical ...
A model is developed to study the characteristics of an arc-driven rail gun. In particular, a system of equations is developed which provides a computationally efficient method for estimating the arc-projectile acceleration and the average thermodynamic properties of the arc. Predictions of the model are compared ...
... Rotorcraft Acceleration and Climb Performance ... 5. Report Date August1991 Rotorcraft Acceleration and Climb Performance Model ...
... Title : NMOS VOLTAGE BREAKDOWN CHARACTERISTICS COMPARED WITH ACCELERATED LIFE TESTS AND FIELD USE DATA. ...
The Bevalac should be viewed not as a model of accelerator hardware - a modern heavy ion complex will look quite different, but as a model for an operating versatile multifaceted, multiuser heavy ion facility. Of value to the planning of a new accelerator such as MARIA is the knowledge of operating modes peculiar ...
Understanding the variable emission of blazars observed with gamma-ray telescopes and Fermi has become a major challenge for theoretical models of particle acceleration. Here, we introduce a novel time-dependent emission model in which the maximum energy of particles is determined from a balance between Fermi type I and II ...
Data from a scan of papers in Physical Review Letters and Physical Review are used to demonstrate that American high-energy physicists show a pattern of accelerator and instrumentation usage characteristic of that expected from the logistic-substitution model of Marchetti and of Fischer and Pry.
Calculations are presented of the excess boundary-layer voltage drop attributable to the conduction of current through a thermal boundary layer on the electrodes of an MHD accelerator operating with seeded air or nitrogen, using the two-temperature model ...
The authors investigate the properties to be expected of jets produced in future accelerators in the TeV energy domain. Current state-of-the-art models for perturbative jet evolution and non-perturbative fragmentation are used, together with experimentall...
A novel method for measuring human gait posture using wearable sensor units is proposed. The sensor units consist of a tri-axial acceleration sensor and three gyro sensors aligned on three axes. The acceleration and angular velocity during walking were measured with seven sensor units worn on the abdomen and the lower limb segments (both thighs, shanks and ...
PubMed
The development of a computational model for the treatment head of a medical electron accelerator (Elekta/Philips SL-18) by the Monte Carlo code mcnp-4C2 is discussed. The model includes the major components of the accelerator head and a pmma phantom representing the patient body. Calculations were performed for a ...
Most of the parameters of a modern linear accelerator can be selected by simulating the desired machine characteristics in a computer code and observing how the parameters affect the beam dynamics. The code PARMILA is used at LAMPF for the low-energy portion of linacs. Collections of particles can be traced with a free choice of input distributions in ...
Blazars are known to emit a broadband emission from radio to gamma rays with rapid time variations, particularly in X-rays and gamma rays. Synchrotron radiation and inverse Compton scattering are thought to play an important role in emission, and the time variations are likely related to the acceleration of nonthermal electrons. As simultaneous multiwavelength observations ...
The authors consider a system in which a planar shock propagates into a plasma where the magnetic field consists of a uniform background component that is nearly parallel to the shock surface (i.e., the shock is nearly perpendicular) plus a random component that is transverse to the background field. The random component is a superposition of Alfven waves with a wide range of wavelengths and with ...
... skill in predicting wave spectra, as well as velocity and acceleration statistics across the surfzone, but it underpredicts acceleration skewness on top ...
Based on a model in which electrons are accelerated to energies of l00 kiloelectron volts through sheaths associated with Io, predictions are made about energetic electrons to be observed by Pioneer 10 and Pioneer 11 in the Jovian magnetosphere. This energetic electron source may be distinguishable from the solarwind diffusion source by the radial ...
Accelerator apparatus having an eccentric-shaped, iris-loaded deflecting cavity for an rf separator for a high energy high momentum, charged particle accelerator beam. In one embodiment, the deflector is superconducting, and the apparatus of this invention provides simplified machining and electron beam welding techniques. Model tests ...
Results are presented of experimental investigations of the volt--ampere charactaeristics of a discharge between the electrodes of an MHD accelerator, of the longitudinal boundary effect, the Hall voltage on different components of the accelerator, etc. The results obtained are numerically analyzed and the main factors determining the form of the ...
The results of an investigation of the structure of an ion flow at the output of an accelerator with closed electron drift and an extended zone of accelerations as a functions of the characteristic of the magnetic field in the accelerator channel are discussed. (AIP)
The results of calculating the effect of spread of some static and dynamic characteristics of 50 NP permalloy, of which the main accelerating elements of the linear induction accelerator are made, are described briefly. When making accelerating sections o...
Results are presented of computer simulations of the jets that accelerate through the corona at velocities of 50 to 400 km/s. Particular emphasis is placed on the sensitivity of the induced acceleration to the form in which energy is put into the system. A comparison is made between the observed and predicted physical characteristics ...
The nonideal characteristics of the electron beam have largely determined the performance of all free-electron laser (FEL) oscillators that have operated up to the present time. A realistic quantitative theoretical assessment of FEL oscillator performance must therefore include a viable representation of the electron beam's characteristics, as ...
The characteristics of dayside electron acceleration regions, or inverted V's, and the nature of the
NASA Technical Reports Server (NTRS)
... Report Date : SEP 1955. Pagination or Media Count : 1. Descriptors : *ELECTRON ACCELERATORS, *LINEAR ACCELERATORS, DESIGN. ...
... ACCELERATED LIFE TESTING OF METALLIC RECTIFIERS ... FACTORS AFFECTING LIFE CHARACTERISTICS CF METALLIC RECTIFIERS ...
... Title : ACCELERATED LIFE TESTING EFFECTS ON CMOS MICROCIRCUIT CHARACTERISTICS. Corporate Author : Report Date : JUL 1977. ...
... ADD873178. Title : ACCELERATED LIFE TESTING EFFECT ON CMOS MICROCIRCUIT CHARACTERISTICS. Corporate Author : ...
The history of linear accelerators is outiined, and the characteristics of linear accelerators used to achieve high energies are described. Electron accelerators are discussed, and the use of the Cockcroft-Walton accelerator to produce neutrons by the D-T reaction is shown. (T.F.H.)
... ACCELERATION TOLERANCE, COMPUTER PROGRAMS, DATA BASES, MATHEMATICAL MODELS, STATISTICAL INFERENCE, LOADS ...
... HUMAN TOLERANCE TO ACCELERATION Prepared under Contract No. ... IN THE ANALYSIS OF HUMAN TOLERANCE TO ACCELERATION ...
In this thesis acceleration of energetic particles at collisionless shock waves in space plasmas is studied using numerical simulations, with an emphasis on physical conditions applicable to the solar corona. The thesis consists of four research articles and an introductory part that summarises the main findings reached in the articles and discusses them with respect to ...
The status of the accelerator programs in Italy, France, Germany, Sweden, United Kingdom, United States, and Japan is briefly summarized. Some of the features and design characteristics of the accelerators are given. (D.C.W.)
The work contains the results of research of the simulated GOCE satellite orbit. For the 30-day orbit determination the Cowell numerical integration of the eighth order was used and the geopotential was described by means of the EGM96 model. The selected accelerations and the Keplerian elements were computed along this orbit. These ...
CMOS MICROCIRCUIT CHARACTERISTICS. Phase II Report. Interim. January 1977 to July 1977. (NASACdi-150381). ACCELERATED LIFE TESTING. N77-31406 ...
NASA Website
In the absence of experimental data on the magnets themselves, an attempt is made to estimate the characteristics of quenches, particularly the hot spot temperature, in the SSC Reference Design A dipoles. The quenches are analyzed using the computer program QUENCH. Input data, material characteristics, are similar to those for other ...
Analogous to volcanic deposits on Earth, we can infer eruption characteristics on Enceladus from the relationship between particle size and distance from the vent. We develop a model in which ice particles feeding plumes are accelerated by the gas. We consider two cases: drag-limited and collision-limited ...
