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[en] An interface device that controls a CAR with a reactor used to be manufactured and supplied by the AECL, but its production has discontinued causing a problem of securing spare parts. In order to avoid relying on foreign technology and to secure stable supply of spare parts and technical support, an interface device was designed and manufactured by domestic technology and its production has been completed. From when a sample was developed, field application tests were performed for several years to resolve both software and hardware problems, and as a result, its performance has been advanced as good as the previous device and through systematic tests, it is now concluded that a domestically-manufactured interface device can be a sufficient substitute of the previous device
[en] The last improvements and updates of the Geometry Database (Geometry DB) for the CBM (Compressed Barionic Matter) experiment are described. The geometry DB is an information system that supports the CBM geometry. The main purpose of Geometry DB is to provide the storage of the CBM geometry, to supply the convenient tools for managing the geometry modules assembling various versions of the CBM setup as a combination of geometry modules and additional files. There has to be the functionality to support the various versions of the CBM setup. The ability of setup versions is added. The set of corresponding tools both the graphical user interface (GUI) and application programming interface (API) was implemented. The users are not always required the regular updates of the local CBMRoot from version control system to solve their tasks (such as simulation or reconstruction). The main goal of the new functionality is automatic selection of the setup version during the loading of the geometry which corresponds to the current user environment.
[en] In the world of computer-based data acquisition and control, the graphical interface program LabVIEW from National Instruments is so ubiquitous that in many ways it has almost become the laboratory standard. To date, there have been approximately fifteen books concerning LabVIEW, but Professor Essick's treatise takes on a completely different tack than all of the previous discussions. In the more standard treatments of the ways and wherefores of LabVIEW such as LabVIEW Graphical Programming: Practical Applications in Instrumentation and Control by Gary W. Johnson (McGraw Hill, NY 1997), the emphasis has been instructing the reader how to program LabVIEW to create a Virtual Instrument (VI) on the computer for interfacing to a particular instruments. LabVIEW is written in ''G'' a graphical programming language developed by National Instruments. In the past the emphasis has been on training the experimenter to learn ''G''. Without going into details here, ''G'' incorporates the usual loops, arithmetic expressions, etc., found in many programming languages, but in an icon (graphical) environment. The net result being that LabVIEW contains all of the standard methods needed for interfacing to instruments, data acquisition, data analysis, graphics, and also methodology to incorporate programs written in other languages into LabVIEW. Historically, according to Professor Essick, he developed a series of experiments for an upper division laboratory course for computer-based instrumentation. His observation was that while many students had the necessary background in computer programming languages, there were students who had virtually no concept about writing a computer program let alone a computer- based interfacing program. Thus the beginnings of a concept for not only teaching computer- based instrumentation techniques, but aiso a method for the beginner to experience writing a com- puter program. Professor Essick saw LabVIEW as the ''perfect environment in which to teach computer-based research skills.'' With this goal in mind, he has succeeded admirably. Advanced LabVIEW Labs presents a series of chapters devoted to not only introducing the reader to LabVIEW, but also to the concepts necessary for writing a successful computer pro- gram. Each chapter is an assignment for the student and is suitable for a ten week course. The first topic introduces the while loop and waveform chart VI'S. After learning how to launch LabVIEW, the student then leans how to use LabVIEW functions such as sine and cosine. The beauty of thk and subsequent chapters, the student is introduced immediately to computer-based instruction by learning how to display the results in graph form on the screen. At each point along the way, the student is not only introduced to another LabVIEW operation, but also to such subjects as spread sheets for data storage, numerical integration, Fourier transformations', curve fitting algorithms, etc. The last few chapters conclude with the purpose of the learning module, and that is, com- puter-based instrumentation. Computer-based laboratory projects such as analog-to-digital con- version, digitizing oscilloscopes treated. Advanced Lab VIEW Labs finishes with a treatment on GPIB interfacing and finally, the student is asked to create an operating VI for temperature con- trol. This is an excellent text, not only as an treatise on LabVIEW but also as an introduction to computer programming logic. All programmers, who are struggling to not only learning how interface computers to instruments, but also trying understand top down programming and other programming language techniques, should add Advanced Lab-VIEW Labs to their computer library
[en] A micro-scale interface dislocation dynamics approach to model the mechanical behavior of crystalline nanolaminates is presented. To circumvent the exhaustive atomistic modeling of interfaces and dislocations in nanolaminates, an atomistically informed dislocation dynamics model was developed in which interfaces are categorized using a geometrical interface classification scheme and the interface-dominated mechanical response is related to nucleation, glide, and reactions of lattice and interface dislocations at/within/across interfaces. We show that such a scheme is effective in mapping the structure–property relations of various types of interfaces.
[en] We report the existence of new branches of steady state cellular structures in directional solidification. These structures consist of repeating cellular subunits, or multiplets, each containing a set of distinct cells separated by unequal grooves. A detailed numerical study of the symmetric model of directional solidification reveals that all multiplets bifurcate off the main singlet solution branch in two sets. Two points on the main branch, one corresponding to the onset of the Eckhaus instability at small cell spacing and the other to a fold of this branch at large spacing, are argued to be separate accumulation points for each set of multiplets. The set of structures bifurcating near the fold are morphologically similar to experimentally observed multiplets. In contrast, those bifurcating near the Eckhaus instability do not resemble experimental shapes. Furthermore, they are argued to be generically unstable. copyright 1997 The American Physical Society
[en] The MOOSE Framework is a modular pluggable framework for building complex simulations. The ability to add new objects with custom syntax is a core capability that makes MOOSE a powerful platform for coupling multiple applications together within a single environment. The creation of a new, more standardized JSON syntax output improves the external interfaces for generating graphical components or for validating input file syntax. The design of this interface and the requirements it satisfies are covered in this short report.
[en] The objective was to define a windowed interface for the handling of Sagace commands. Sagace is a software for the processing and extraction of data produced by numerical calculations and simulations, and is first briefly presented. Interface functions are identified: command, history, filters, message, and other additional services. The proposed interface is then presented with its different menus, its main window, the window for the definition of activity follow-up preferences
[en] The basic concepts of the ultrafast optoelectronic interface for superconducting digital electronics are presented. Several implementations of both the input optical-to-electrical and the output electrical-to-optical transducers are discussed. As an example, an optoelectronic telecommunication router is used that is capable of switching signals at a >100 Gbit s-1 rate on a single wavelength. We demonstrate that superconducting optoelectronics emerges as the ultimate solution to the ultrafast input/output (I/O) interface of single-flux-quantum (SFQ)-based, superconducting digital electronics. (author)
[en] We establish the equivalence of 2D contour dynamics to the dispersionless limit of the integrable Toda hierarchy constrained by a string equation. Remarkably, the same hierarchy underlies 2D quantum gravity. (c) 2000 The American Physical Society
[en] The work of separation and interfacial energy of the Ni(1 1 1)/Cr(1 1 0) interface are calculated via first-principles methods. Both coherent and semicoherent interfaces are considered. We find that magnetism has a significant effect on the interfacial energy, i.e. removing magnetism decreases the interfacial energy of the semicoherent interface by around 50% . Electronic, magnetic and atomic structures at the interface are discussed. An averaging scheme is used to estimate the work of separation and interfacial energy of semicoherent interfaces based on the results of coherent interfaces. The limitations of the scheme are discussed. (paper)