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1
Global water cycle agreement in the climate models assessed in the ...

accurate model representation of the water cycle and its role in climate ... global water cycle (GWC) based on up to date observational resources [Oki and Kanae ...

NASA Website

2
Role of Research Aircraft in Technology Development - NASA

wind tunnel wall effects, model blockage effects, and condensation effects. Technology Spinoff. The F-8 SCW program required an accurate Mach number ...

NASA Website

3
Modeling Interception of Rainfall by Forests and the Role of Interception in the Water Balance.
1984-01-01

Interception is an important component of the forest water balance that cannot be ignored where accurate water balance estimates are desired. The state of modelling the interception of rainfall has been greatly improved by the development of models using ...

National Technical Information Service (NTIS)

4
THE ABCS OF SNOWMELT: A TOPOGRAPHICALLY FACTORIZED ENERGY COMPONENT SNOWMELT MODEL. (R824784)

Because of the crucial role snowmelt plays in many watersheds around the world, it is important to understand and accurately quantify the melt process. As such, numerous mathematical models attempting to describe and predict snowmelt have arisen. There are two main categories of ...

EPA Science Inventory

5
Speciation of Aqueous Contaminants: Role of the Geochemical Model.
1981-01-01

A combination of accurate, selected analytical determinations and a competent geochemical model constitutes the only possible means of achieving a sufficiently thorough and reliable aqueous speciation of waters for the evaluation of societal risks resulti...

National Technical Information Service (NTIS)

6
Alternative Procedure for Estimating Unit Learning Curves.
1985-01-01

The unit learning curve plays a prominent role in DOD cost analysis. In those cases where the model accurately describes the real-life situation, i.e., when the model is properly applied to the data, it can be a powerful tool for predicting unit productio...

National Technical Information Service (NTIS)

7
Role of Spatially Distributed Ion Channels in Single Neuron Computation.
1993-01-01

Towards the overall goal of making an accurate mathematical model of a neocortical pyramidal neuron, (1) the electrical properties of Na+ and Ca2+ channel subtypes were measured in sufficient detail to construct a quantitative empirical model, and (2) ant...

National Technical Information Service (NTIS)

8
Mechanism of open-flavor strong decays.
1995-01-01

In this contribution the author discusses models of two-body strong hadron decays. These models are expected to play a vital role in future attempts to identify unconventional hadrons such as glueballs and hybrids, through accurate predictions of the deca...

National Technical Information Service (NTIS)

9
SIMPLE AND ACCURATE CALIBRATION MODEL FOR ...
1967-05-01

... Title : SIMPLE AND ACCURATE CALIBRATION MODEL FOR HYDROGEN- CONTENT, BETA-PARTICLE BACKSCATTER GAUGES. ...

DTIC Science & Technology

10
Development of a New Shielding Model for JB-Line Dose Rate Calculations
2001-08-09

This report describes the shielding model development for the JB-Line Upgrade project. The product of this effort is a simple-to-use but accurate method of estimating the personnel dose expected for various operating conditions on the line. The current techniques for shielding calculations use transport codes such as ANISN which, while ...

Energy Citations Database

11
Review of Electron Impact Excitation Cross Sections for Copper Atom.
1982-01-01

Excitation of atomic copper by electron impact plays an important role in the copper vapor laser and accurate cross sections are needed for understanding and modeling laser performance. During the past seven years, there have been several attempts to norm...

National Technical Information Service (NTIS)

12
Piston-Liner Crevice Geometry Effect on HCCI Combustion by Multi-Zone Analysis.
2002-01-01

A multi-zone model has been developed that accurately predicts HCCI combustion and emissions. The multizone methodology is based on the observation that turbulence does not play a direct role on HCCI combustion. Instead, chemical kinetics dominates the pr...

National Technical Information Service (NTIS)

13
NIMA Address to the Executive Forum on Modeling & Simulation.
2002-01-01

This briefing includes NIMA's mission which is to provide timely relevant and accurate imagery, imagery intelligence, and geospatial information in support of the national security objectives of the United States. It discusses NIMA's role as a data produc...

National Technical Information Service (NTIS)

14
Characterizing the impact of diffusive and advective soil gas transport on the measurement and interpretation of the ...

... techniques, (2) evaluate the roles of diffusion and advection in a forest soil on the estimates of ( ... transport was little to non-existent; however, an advection-diffusion model was more accurate than a...

NBII National Biological Information Infrastructure

15
Time-Accurate Aerodynamic Modeling of Synthetic Jets for ...
2004-06-01

... Unsteady or time-accurate CFD modeling Competent smart munitions that can more accurately hit a ... cubic k-& model, depending on grid fineness. ...

DTIC Science & Technology

16
Accurate Pairing Treatment of the Coulomb Interaction in the ...
1970-12-21

... Title : Accurate Pairing Treatment of the Coulomb Interaction in the Anderson Model of a Localized Moment in a Metal. ...

DTIC Science & Technology

17
ACCURATE DETERMINATION OF THE MOMENT OF ...
1953-07-01

... Title : ACCURATE DETERMINATION OF THE MOMENT OF INERTIA AND CENTER OF GRAVITY POSITION OF WIND TUNNEL MODELS. ...

DTIC Science & Technology

18
Rationalizing foot and ankle measurements to conform to a rigid body model.
2006-04-01

Accurate estimation of the in vivo locations of skeletal landmarks plays an integral role in several biomechanical research techniques. Because of rounding errors caused by instruments or skin movement, the data obtained through cinematography are usually not accurate and rise to a distance matrix which, because of the data errors, may ...

PubMed

19
Experimental and modelling analysis of ferroresonant electric circuits
2007-09-01

This paper presents a numerical and an experimental investigation on the ferroresonance in a LCR series electric circuit with the aim of deepening the effects of the magnetization phenomena in the ferromagnetic core. In the experiments an Epstein-like FeSi core, enabling an accurate material characterization under the same test conditions, constitutes the non-linear ...

NASA Astrophysics Data System (ADS)

20
Mathematical Modeling of Physical and Cognitive ...
2009-12-01

... at explaining the response to hypoxia and hypercapnia ... More accurate lung injury model. ... accurate determination of lung injuries, including location ...

DTIC Science & Technology

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21
Accurate Multiresolution Modeling of the Earth's Gravitational ...
2001-09-01

... Accession Number : ADA396425. Title : Accurate Multiresolution Modeling of the Earth's Gravitational Field. Descriptive ...

DTIC Science & Technology

22
Accurate Modeling of Ionospheric Electromagnetic Fields ...
2009-03-31

... Accession Number : ADA534986. Title : Accurate Modeling of Ionospheric Electromagnetic Fields Generated by a Low Altitude VLF Transmitter. ...

DTIC Science & Technology

23
Parallel viscous modification of the resistive tearing instability in a cylindrical model of the hard-core pinch
1973-10-01

The influence of parallel'' viscosity on the resistive tearing'' mode in a cylindrical model of a plasma is investigated for a hard-core pinch. Iterative solutions of the basic equation indicate that the destabilization suggested by a previous cartesian model is not substantiated, and in fact under extreme ...

Energy Citations Database

24
Dynamic saturation in Semiconductor Optical Amplifiers: accurate model, role of carrier density, and slow light.
2010-01-18

We developed an improved model in order to predict the RF behavior and the slow light properties of the SOA valid for any experimental conditions. It takes into account the dynamic saturation of the SOA, which can be fully characterized by a simple measurement, and only relies on material fitting parameters, independent of the optical intensity and the injected current. The ...

PubMed

25
Emission inventories: A global modeling perspective
1992-11-18

Concern regarding human induced changes in the chemical and radiative properties of our atmosphere through increased emission of trace gas species has received considerable attention. Effective models are needed to understand the future of ozone, global warming and other important anthropogenic perturbations before policy decisions can be considered. In order to ...

Energy Citations Database

26
Fine calibration of physical resist models: the importance of Jones pupil, laser bandwidth, mask error and CD metrology for accurate modeling at advanced lithographic nodes
2011-03-01

In this paper, we discuss the accuracy of resist model calibration under various aspects. The study is done based on an extensive OPC dataset including hundreds of CD values obtained with immersion lithography for the sub-30 nm node. We address imaging aspects such as the role of Jones matrices, laser bandwidth and mask bias. Besides we focus on the ...

NASA Astrophysics Data System (ADS)

27
Physics of ion sputtering
1984-04-01

The ejection of atoms by the ion bombardment of solids is discussed in terms of linear collision cascade theory. A simple argument describes the energies of the ejecta, but elaborate models are required to obtain accurate sputtering yields and related quantities. These include transport theoretical models based on linearized Boltzmann ...

Energy Citations Database

28
Modeling correlated healthcare costs.
2011-02-01

Accurate estimation and prediction of healthcare costs play crucial roles in decisions made by healthcare agencies on policy and resource allocation. Development of a cost model allows these decision-makers the opportunity to investigate the impact of different policies and/or allocations of resources. With increased subject-specific ...

PubMed

29
The tammar wallaby: a model to examine endocrine and local control of lactation.
2007-03-01

Marsupials, such as the tammar wallaby (Macropus eugenii), have adopted a reproductive strategy that is very different to eutherians. Both the rate of production and the composition of milk changes progressively during the lactation cycle to meet the nutritional demands of an altricial young. The tammar therefore provides a valuable model to study changes in milk composition, ...

PubMed

30
The role of MW in precision studies of the standard model
1998-01-01

Recent calculations have significantly decreased the scheme and residual scale dependence of basic radiative corrections of the Standard Electroweak Model. This leads to a theoretically accurate prediction of the W-boson mass MW, as well as a reduced upper bound for the Higgs boson mass MH. The implications of a precise MW measurement on the MH estimate ...

NASA Astrophysics Data System (ADS)

31
Accurate Q value measurements for fundamental physics studies at JYFLTRAP
2011-07-01

We have measured several Q values at JYFLTRAP for superallowed ? decays that contribute to testing the Standard Model and candidate nuclei that one could use for the search of neutrinoless double- ? decay. These results play important roles in the research of fundamental physics that have scopes beyond Standard Model.

NASA Astrophysics Data System (ADS)

32
Skills development using role-play in a first-year pharmacy practice course.
2011-06-10

Objectives. To evaluate the usefulness of a role-play model in developing students' patient-care skills in a first-year undergraduate pharmacy practice course.Design. A role-play model was developed and implemented in workshops across 2 semesters of a year-long course. Students performed different ...

PubMed

33
Skills Development Using Role-Play in a First-Year Pharmacy Practice Course
2011-06-10

Objectives. To evaluate the usefulness of a role-play model in developing students� patient-care skills in a first-year undergraduate pharmacy practice course.Design. A role-play model was developed and implemented in workshops across 2 semesters of a year-long course. Students performed different ...

PubMed Central

34
An Exploration of Pre-Service Teachers' Expectations for Their Future Roles
2008-12-01

The diversity of teacher roles has been a long-standing concern in the field of special education. Role complexity has been implicated in teacher burnout and attrition and in the inefficiency of service delivery models. Recent evidence suggests that new policy may be further complicating teacher roles and that ...

ERIC Educational Resources Information Center

35
An Efficient and Accurate Method of Estimating Substrate ...
2005-08-24

... Title: An Efficient and Accurate Method of Estimating Substrate ... This thesis presents a Z-parameter based model to predict the substrate ...

DTIC Science & Technology

36
Accurate Identification of Evoked Potentials by Waveform ...
2001-10-25

... to) - Title and Subtitle Accurate Identification of Evoked Potentials by Waveform Decomposition Using Discrete Cosine Transform Modeling ...

DTIC Science & Technology

37
Accurate Identification of Evoked Potentials by Waveform ...
2001-10-25

... Title : Accurate Identification of Evoked Potentials by Waveform Decomposition Using Discrete Cosine Transform Modeling. ...

DTIC Science & Technology

38
A Causal Based Inventory Forecasting Model for an ...
1997-12-01

... for an Electronics Capital Equipment Manufacturer. ... accurate inventory demand forecasting is becoming ... need for accurate forecasts and adequate ...

DTIC Science & Technology

39
The New NASA Orbital Debris Engineering Model ORDEM2000

The primary requirement for any engineering model is to provide the user accurate ... Thus, any engineering model must include an accurate assessment of the ...

NASA Website

40
The three dimensional spherical model for the AGCE
1981-01-01

The development of accurate numerical model of the atmospheric general circulation experiment (AGCE)

NASA Technical Reports Server (NTRS)

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41
Community Sediment Transport Model

... An accurate and useful model will require coupling sediment-transport with hydrodynamic forcing and stratigraphy. The ...

DTIC Science & Technology

42
Mining tandem mass spectral data to develop a more accurate mass error model for peptide identification.
2007-01-01

The assumption on the mass error distribution of fragment ions plays a crucial role in peptide identification by tandem mass spectra. Previous mass error models are the simplistic uniform or normal distribution with empirically set parameter values. In this paper, we propose a more accurate mass error model, namely ...

PubMed

43
System analysis through bond graph modeling
2005-01-01

Modeling and simulation form an integral role in the engineering design process. An accurate mathematical description of a system provides the design engineer the flexibility to perform trade studies quickly and accurately to expedite the design process. Most often, the mathematical model of ...

NASA Astrophysics Data System (ADS)

44
Accurate Cell Division in Bacteria: How Does a Bacterium Know Where its Middle Is?
2004-03-01

I will discuss the physical principles lying behind the acquisition of accurate positional information in bacteria. A good application of these ideas is to the rod-shaped bacterium E. coli which divides precisely at its cellular midplane. This positioning is controlled by the Min system of proteins. These proteins coherently oscillate from end to end of the bacterium. I will ...

NASA Astrophysics Data System (ADS)

45
Modeling the frequency dependence of the electrical properties of the live human skull.
2009-10-20

An accurate impedance model of a skull plays an important role in the simulation research on source localization of EEG and brain EIT (electrical impedance tomography), etc. On the basis of the large number of impedance and resistivity data obtained from our previous measurement on the live human skull, in this study we established the ...

PubMed

46
Some thoughts on the modeling of atmospheric turbulence from the perspective of a non-expert
1985-01-01

Recent work with a wind turbulence model has demonstrated that the effects of wind turbulence may be large. This work also illustrates that turbulence models do not need to accurately reproduce all the details in the physical wind to be of benefit to the wind turbine community. Their use, however, will be facilitated if they are ...

Energy Citations Database

47
Nature of firm expectations in petroleum exploration
1979-08-01

Econometrics and traditional modeling have not accurately forecast the effects of prices and policies on future oil supplies. A lack of specific data and the assumption that field behavior is too erratic for successful modeling have been obstacles to using a less-aggregated analysis. A study of exploration behavior as it relates to a ...

Energy Citations Database

48
INTEGRATED SYSTEM SIMULATION IN X-RAY RADIOGRAPHY
2001-01-01

An integrated simulation capability is being developed to examine the fidelity of a dynamic radiographic system. This capability consists of a suite of simulation codes which individually model electromagnetic and particle transport phenomena and are chained together to model an entire radiographic event. Our study showed that the electron beam spot size ...

DOE Information Bridge

49
Sub-Pixel Reflectance Unmixing in Estimating Vegetation Water Content and Dry Biomass of Corn and Soybeans Cropland using Normalized Difference Water Index (NDWI) from Satellites

Estimating vegetation cover, water content and dry biomass from space plays a significant role in a variety of scientific fields including drought monitoring, climate modeling, and agricultural prediction. However, getting accurate and consistent measurements of vegetation is complicated very often ...

Technology Transfer Automated Retrieval System (TEKTRAN)

50
Spectral Bio-indicator simulations for tracking photosynthetic activities in a corn field

Accurate assessment of vegetation canopy optical properties plays a critical role in monitoring natural and managed ecosystems under environmental changes. In this context, radiative transfer (RT) models simulating vegetation canopy reflectance have been demonstrated to be a powerful tool for unders...

Technology Transfer Automated Retrieval System (TEKTRAN)

51
Science Nation: Sunspots Revealed

Sunspots have fascinated mankind right from their first detection. Now, state-of-the art telescopes, combined with the muscle of a supercomputer called "Bluefire," are allowing scientists to come to a physics understanding of sunspots and to accurately model their structure and dynamics. Better understanding of sunspots also will help scientists sort out ...

NSDL National Science Digital Library

52
Role of Grain Boundary Character in the Environmentally-Assisted Integranular Cracking Mechanism of Nickel-Base Alloys: Progress Report, August 1, 1988-July 31, 1989.
1989-01-01

Over the past year additional experimental results and more accurate modeling were obtained for the grain boundary chemistry and structure of controlled purity alloys 690 and X-750 material as a function of thermal treatment. High purity heats of Ni-30Cr-...

National Technical Information Service (NTIS)

53
Effect of Friction on Rolling Tire - Pavement Interaction. USDOT Region V Regional University Transportation Center Final Report.
2010-01-01

Accurate modeling of tire-pavement contact behavior (i.e., distribution of contact tractions at the interface) plays an important role in the analysis of pavement performance and vehicle driving safety. The tire-pavement contact is essentially a rolling c...

National Technical Information Service (NTIS)

54
Adaptive Friction Compensation for Servo Mechanisms

Adaptive Friction Compensation for Servo Mechanisms J. Wang, S. S. Ge, and T. H. Lee Department@nus.edu.sg Abstract Friction exists in all machines having relative motion, and plays an important role in many servo, accurate friction modeling and effective compensation techniques have to be investigated. In this chapter

E-print Network

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