Formalism Describing the Object Models for Domains on a Unified Metamodel of Object-Oriented Database Applications Terms

This article presents a formal description of object models in terms of unified object-oriented database applications metamodel. The metamodel was developed by the author and independent of the domain area. The metamodel is realized by the author in own environment of development SharpArchitect RAD (Rapid Application Development) Studio. On the basis of the metamodel we using set theory proposed formal approach to the description of the model application domains

Metamodel-Driven Design of Database Applications

This article describes the unified metamodel of object system which can be used for Metamodel-Driven Design (MMDD) of information system. At the beginning of the work carried out in-depth analysis of existing studies devoted to the organization different metamodels. Metamodel for representing fragments in the figures presented class diagrams of Unified Modeling Language (UML). The metamodel is realized by the author in own environment of development SharpArchitect RAD Studio. In the beginning of this article provides a general diagram which displays important associations. Next are separately shown metaclasses hierarchy which representing the entity classes of domain. There are also metaclasses to represent different types of class attributes. In addition, there are metaclasses to represent methods validation rules and visualization rules. This allows the system to implement the behavior the need for object-oriented design and allows to configure the graphical user interface. Each hierarchy is described in detail with an indication of abstract and concrete classes and associations in which they participate.Any database system can be developed in terms of a unified metamodel of object system described in detail in this article. This work provides links to the work that is described in detail the experience of using the described metamodel. As further development of the work the author suggest the development of a formal mathematical apparatus describing applied domains and the development of UML-profile that facilitates the process of logical design of information systems in the framework of the proposed approach.This paper describes a practical experience of the implementation of the authors of information system that automates the activities of a fast food restaurant. We studied in detail the functionality a similar system of the most popular in Russia

UML-Profile for Metamodel-Driven Design of Database Applications

The article presents a UML profile for a software development environment Sharp Architect RAD Studio. This tool is intended to agile design of object-oriented databases. The main part of the article contains the description of the profile metamodel. There is an example of the profile usage. At the end of the article the authors draw some conclusions and plan future works

Design, Performance, and Calibration of CMS Hadron Endcap Calorimeters

Detailed measurements have been made with the CMS hadron calorimeter endcaps (HE) in response to beams of muons, electrons, and pions. Readout of HE with custom electronics and hybrid photodiodes (HPDs) shows no change of performance compared to readout with commercial electronics and photomultipliers. When combined with lead-tungstenate crystals, an energy resolution of 8\% is achieved with 300 GeV/c pions. A laser calibration system is used to set the timing and monitor operation of the complete electronics chain. Data taken with radioactive sources in comparison with test beam pions provides an absolute initial calibration of HE to approximately 4\% to 5\%

Ultrashort laser -matter interaction at moderate intensities: two-temperature relaxation, foaming of stretched melt, and freezing of evolving nanostructures

ABSTRACT Interaction of ultrashort laser pulse with metals is considered. Ultrafast heating in our range of absorbed fluences F abs > 10 mJ/cm 2 transfers matter into two-temperature (2T) state and induces expressed thermomechanical response. To analyze our case, where 2T, thermomechanical, and multidimensional (formation of surface structures) effects are significant, we use density functional theory (DFT), solutions of kinetic equations in τ -approximation, 2T-hydrodynamics, and molecular dynamics simulations. We have studied transition from light absorption in a skin layer to 2T state, and from 2T stage to hydrodynamical motions. We describe (i) formation of very peculiar (superelasticity) acoustic wave irradiated from the laser heated surface layer and (ii) rich complex of surface phenomena including fast melting, nucleation of seed bubbles in hydrodynamically stretched fluid, evolution of vapor-liquid mixture into very spatially extended foam, mechanical breaking of liquid membranes in foam (foam disintegration), strong surface tension oscillations driven by breaking of membranes, non-equilibrium freezing of overcooled molten metals, transition to nano-domain solid, and formation of surface nanostructures