M subshell fluorescence yield (omega(Mi), i=1-5) and Coster-Kronig yield (f(Mij), i=1-4, j=2-5) values have been generated for elements with Z, 57 56, the interpolation of non-relativistic data of McGuire [Phys. Rev....
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M subshell fluorescence yield (omega(Mi), i=1-5) and Coster-Kronig yield (f(Mij), i=1-4, j=2-5) values have been generated for elements with Z, 57 <= Z <= 90. Keeping in view the importance of omega(Mi) and fmu for M X-ray productions in the region Z > 56, the interpolation of non-relativistic data of McGuire [Phys. Rev. A 1972;5:1043-7] in the region Z=57-90 as well as relativistic data of Chen et al. [Phys. Rev. A 1980;21:449-53 and 1983;27:2989-94] in the region Z=67-90 was attempted. The agreement between the generated data and the actual ones supported the adopted procedure. Subsequently, a computer software code MFCKYLD was developed to generate the yield values on computer terminal or in file for both non-relativistic and relativistic data just by entering the atomic number Z of the element through keyboard or file. The precision of present procedure that relies on the deviation of fitted values from the actual ones was found far better than the earlier fitted data. (C) 2013 Elsevier Ltd. All rights reserved.
Average M shell fluorescence yield (pi(M)) have been calculated from non-relativistic data of McGuire (Phys Rev A 1972;5:1043-47) in the region Z=60-90 and relativistic data of Chen, Crasemann and Mark (Phys Rev A 198...
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Average M shell fluorescence yield (pi(M)) have been calculated from non-relativistic data of McGuire (Phys Rev A 1972;5:1043-47) in the region Z=60-90 and relativistic data of Chen, Crasemann and Mark (Phys Rev A 1980;21:449-53) and (Phys Rev A 1983;27:2989-94) in the region Z=70-90 on M sub-shell fluorescence yield (omega(M) i=1-5) and Coster-Kronig yield (f(Mij), i=1-4, j= 2-5) procured from our earlier work (a computer software code MFCKYLD) using Scofield's data (Lawrence Livermore Laboratory Report UCRL 51326;1973) on M sub-shell photo-ionization cross-sections. Subsequently, a computer software code AMSFYLD was developed to generate the yield values on computer terminal or in file for both non-relativistic and relativistic data just by entering the atomic number Z of the element through keyboard or file. The values were compared with available theoretical and experimental values in the literature. The agreement between the present data and the other supports the present values. (C) 2014 Elsevier Ltd. All rights reserved.
A computer software named T/BEST, Technology Benefit Estimator, has been developed to provide a formal method to assess advanced aerospace technologies and quantify the benefit contributions for prioritization. An ope...
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A computer software named T/BEST, Technology Benefit Estimator, has been developed to provide a formal method to assess advanced aerospace technologies and quantify the benefit contributions for prioritization. An open-ended, modular approach is used to allow for upgrade and insertion of advanced technology modules. T/BEST's software framework, beginner-to-expert operation, interface architecture and key analysis modules are discussed. fn this paper, selected features and applications of T/BEST are demonstrated. Sample cases pertaining to structural analysis of fan and compressor blades made of titanium and composite are presented. The performance of hot and cold composite fan blades is also discussed. The cost required to manufacture titanium and composite fan blades is estimated. (C) 1997 Elsevier Science Limited.
This paper reviews some recent developments for prediction of sublimation energy and deflagration temperature of energetic materials, which are important for the assessment of hazardous properties of these types of co...
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This paper reviews some recent developments for prediction of sublimation energy and deflagration temperature of energetic materials, which are important for the assessment of hazardous properties of these types of compounds. A novel user-friendly computer code, written in Visual Basic, is introduced to predict sublimation energy and deflagration temperature of energetic materials through using only their molecular structure parameters. It can be used for different types of energetic compounds including nitroaliphatics, nitroaromatics, nitramines and nitrate esters. The predicted results were compared with experimental data for some new energetic compounds of different classes containing complex molecular structures, which confirm high reliability of this novel computer code.
In this paper a new simple user-friendly computer code, in Visual Basic, has been introduced to evaluate detonation performance of high explosives and their thermochemical properties. The code is based on recently dev...
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In this paper a new simple user-friendly computer code, in Visual Basic, has been introduced to evaluate detonation performance of high explosives and their thermochemical properties. The code is based on recently developed methods to obtain thermochemical and performance parameters of energetic materials, which can complement the computer outputs of the other thermodynamic chemical equilibrium codes. It can predict various important properties of high explosive including velocity of detonation, detonation pressure, heat of detonation, detonation temperature, Gurney velocity, adiabatic exponent and specific impulse of high explosives. it can also predict detonation performance of aluminized explosives that can have non-ideal behaviors. This code has been validated with well-known and standard explosives and compared the predicted results, where the predictions of desired properties were possible, with outputs of some computer codes. A large amount of data for detonation performance on different classes of explosives from C-NO2, O-NO2 and N-NO2 energetic groups have also been generated and compared with well-known complex code BKW. (C) 2009 Elsevier B.V. All rights reserved.
Trust and trustworthiness judgments have been studied in the context of social, business, and romantic relationships as well as between humans and automation. This article extends the prior research to explore how pro...
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Trust and trustworthiness judgments have been studied in the context of social, business, and romantic relationships as well as between humans and automation. This article extends the prior research to explore how programmers assess code for trustworthiness when asked to reuse existing computer code. We used cognitive task analysis methods to explore experienced programmers' first-person perspectives on code reuse. We elicited specific cues and strategies used to assess trustworthiness in real-world scenarios. Using qualitative analysis techniques, we grouped cues into three trustworthiness factors: performance, transparency, and reputation. We also identified environmental factors that influence acceptable levels of trust, including customer needs and requirements, organizational resources and constraints, and consequences of failure. We propose a descriptive model based on these findings. These findings have important implications for organizations that intend to reuse, adapt, and extend code over time. Writing code with the factors such as reputation, transparency, and performance in mind will increase the likelihood that it will be trusted in the near term and be reusable in the future. Furthermore, this research provides an important foundation for future studies exploring trusting behaviors, individual differences, and the ability to detect malicious code.
3D computer code MBEG-MSU for multiple beam electron gun analysis is developed. The main numerical methods used in program code are described. Calculation results of 18-beam electron gun investigation in kinematics mo...
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ISBN:
(纸本)9781424406333
3D computer code MBEG-MSU for multiple beam electron gun analysis is developed. The main numerical methods used in program code are described. Calculation results of 18-beam electron gun investigation in kinematics mode are presented. The first calculation results with taking into account space charge effects are presented too.
computer code has entered our society in contexts ranging from medical to manufacturing settings. The current study expanded previous literature by examining the effects of three between-subject factors (i.e., reputat...
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ISBN:
(数字)9783030490652
ISBN:
(纸本)9783030490645;9783030490652
computer code has entered our society in contexts ranging from medical to manufacturing settings. The current study expanded previous literature by examining the effects of three between-subject factors (i.e., reputation, organization, and readability) on various trust-related outcomes. Participants (N = 54) were computer programmers recruited from Amazon's Mechanical Turk (MTurk). We used a 2 (reputable or non-reputable source) x 3 (high, medium, or low organization) x 3 (high, medium, or low readability) between-subjects design to examine how the independent variables interact to predict the trustworthiness perceptions of the code. The results show that programmers perceive code differently when coming from reputable sources. Thus, it is important to highlight whether or not any open source code comes from a reputable source and make this information readily available to programmers. Another trend we found is that programmers tend to prefer conspicuously high or low organization, particularly when readability is low. Thus, a medium level of organization could obfuscate the goals of the original programmer, which may undermine the programmer's intent and reduce code trustworthiness.
A 1989 SPIE proceedings paper described the first version of an optical properties computer code developed at the Applied Physics Laboratory. The emphasis was on durable infrared window materials. In the thirty years ...
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ISBN:
(数字)9781510626362
ISBN:
(纸本)9781510626362
A 1989 SPIE proceedings paper described the first version of an optical properties computer code developed at the Applied Physics Laboratory. The emphasis was on durable infrared window materials. In the thirty years since the beginning of this code development a lot of progress has been made concerning the physics based models used to represent the complex index of refraction and the number of materials characterized. A key feature is providing the frequency and temperature dependence of optical properties. Room temperature data is available for a wide range of materials, but temperature dependent data is much harder to find. The status of the code development along with example outputs will be reported.
RADIA is a three-dimensional magnetostatics computer code optimized for the design of undulators and wigglers. It solves boundary magnetostatics problems with magnetized and current-carrying volumes using the boundary...
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RADIA is a three-dimensional magnetostatics computer code optimized for the design of undulators and wigglers. It solves boundary magnetostatics problems with magnetized and current-carrying volumes using the boundary integral approach. The magnetized volumes can be arbitrary polyhedrons with non-linear (iron) or linear anisotropic (permanent magnet) characteristics. The current-carrying elements can be straight or curved blocks with rectangular cross sections. Boundary conditions are simulated by the technique of mirroring. Analytical formulae used for the computation of the field produced by a magnetized volume of a polyhedron shape are detailed. The RADIA code is written in object-oriented C++ and interfaced to Mathematica [Mathematica is a registered trademark of Wolfram Research, Inc.]. The code outperforms currently available finite-element packages with respect to the CPU time of the solver and accuracy of the field integral estimations. An application of the code to the case of a wedge-pole undulator is presented.
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