A Parsing Scheme for Finding the Design Pattern and Reducing the Development Cost of Reusable Object Oriented Software

Because of the importance of object oriented methodologies, the research in developing new measure for object oriented system development is getting increased focus. The most of the metrics need to find the interactions between the objects and modules for developing necessary metric and an influential software measure that is attracting the software developers, designers and researchers. In this paper a new interactions are defined for object oriented system. Using these interactions, a parser is developed to analyze the existing architecture of the software. Within the design model, it is necessary for design classes to collaborate with one another. However, collaboration should be kept to an acceptable minimum i.e. better designing practice will introduce low coupling. If a design model is highly coupled, the system is difficult to implement, to test and to maintain overtime. In case of enhancing software, we need to introduce or remove module and in that case coupling is the most important factor to be considered because unnecessary coupling may make the system unstable and may cause reduction in the system's performance. So coupling is thought to be a desirable goal in software construction, leading to better values for external software qualities such as maintainability, reusability and so on. To test this hypothesis, a good measure of class coupling is needed. In this paper, based on the developed tool called Design Analyzer we propose a methodology to reuse an existing system with the objective of enhancing an existing Object oriented system keeping the coupling as low as possible.Comment: 15 page

The whistler nozzle phenomenon

The whistler nozzle is a simple device which can induce jet self-excitations of controllable amplitudes and frequencies and appears highly promising for many applications involving turbulent transport, combustion and aerodynamic noise. The characteristics of this curious phenomenon are documented for different values of the controlling parameters and attempts to explain the phenomenon. It is shown that the whistler excitation results from the coupling of two independent resonance mechanisms: shear-layer tone resulting from the impingement of the pipe-exit shear layer on the collar lip, and organ-pipe resonance of the pipe-nozzle. The crucial role of the shear-layer tone in driving the organ-pipe resonance is proven by reproducing the event in pipe-ring and pipe-hole configurations in the absence of the collar. It is also shown that this phenomenon is the strongest when the self-excitation frequency matches the preferred mode of the jet

Towards the Formal Reliability Analysis of Oil and Gas Pipelines

It is customary to assess the reliability of underground oil and gas pipelines in the presence of excessive loading and corrosion effects to ensure a leak-free transport of hazardous materials. The main idea behind this reliability analysis is to model the given pipeline system as a Reliability Block Diagram (RBD) of segments such that the reliability of an individual pipeline segment can be represented by a random variable. Traditionally, computer simulation is used to perform this reliability analysis but it provides approximate results and requires an enormous amount of CPU time for attaining reasonable estimates. Due to its approximate nature, simulation is not very suitable for analyzing safety-critical systems like oil and gas pipelines, where even minor analysis flaws may result in catastrophic consequences. As an accurate alternative, we propose to use a higher-order-logic theorem prover (HOL) for the reliability analysis of pipelines. As a first step towards this idea, this paper provides a higher-order-logic formalization of reliability and the series RBD using the HOL theorem prover. For illustration, we present the formal analysis of a simple pipeline that can be modeled as a series RBD of segments with exponentially distributed failure times.Comment: 15 page

Inelastic X-ray scattering in correlated (Mott) insulators

We calculate the inelastic light scattering from X-rays, which allows the photon to transfer both energy and momentum to the strongly correlated charge excitations. We find that the charge transfer peak and the low energy peak both broaden and disperse through the Brillouin zone similar to what is seen in experiments in materials like Ca_2 Cu O_2 Cl_2.Comment: 5 pages Revtex4, 6 figure

Influence of Naturally Originated Jute on the Fabrication & Mechanical Properties of Jute/Polyester Hybrid Composite

Jute-Polyester reinforced Composited is fabricated through this research. The development of composite materials based on the reinforcement of two or more fiber types in a matrix leads to the production of hybrid composites. Jute cloth Polyester resin were used to prepare the Jute/Polyester composites by hand lay-up and heat press molding techniques and their mechanical properties behaviors were evaluated for different stacking sequences. In Jute/polyester mechanical properties such as tensile strength, bending properties and impact strength increase with the increases of stacking sequences. Water uptake (%) of this composite demonstrates that water absorption rate is initially higher for jute/polyester composite and at a stage it becomes steady (31.11%). Soil degradation test of all types of Jute/polyester were evaluated and the deterioration of the mechanical properties revealed for jute/polyester composites showed the higher degree but retained major portion of its original integrity and depicts the hybrid

Perbandingan Pendekatan Konstruktivisme antara Model Pembelajaran Discovery Learning dan Reception Learning terhadap Kemampuan Berpikir Kritis dan Hasil Belajar Peserta Didik Kelas X SMA Negeri 3 Takalar

Penelitian ini bertujuan untuk mengetahui perbedaan yang signifikan kemampuan berfikir kritis dan hasil belajar peserta didik kelas X SMA Negeri 3 Takalar dengan menggunakan model pembelajaran Discovery Learning dan Reception Learning. Metode penelitian yang digunakan yaitu Quasi Eksperimen Design dengan menggunakan desain Nonequivalent Control Group Design, dengan jumlah populasi yaitu seluruh kelas X SMA Negeri 3 Takalar. Teknik pengambilan sampel dalam penelitian ini yaitu Simple Random Sampling yaitu kelas X1 sebagai kelas eksperimen dengan jumlah peserta didik sebanyak 36 orang dan kelas X5 sebagai kelas kontrol dengan jumlah peserta didik sebanyak 34 orang. Instrumen pengumpulan data yang digunakan adalah tes untuk mengetahui kemampuan berpikir kritis dan hasil belajar peserta didik dengan menggunakan model pembelajaran Discovery Learning dan Reception Learning. Data tersebut kemudian dianalisis dengan menggunakan analisis deskripsi dan inferensial. Analisis deskripsi untuk mengetahui deskripsi kemampuan berpikir kritis dan hasil belajar peserta didik dengan menggunakan model pembelajaran Discovery Learning dan Reception Learning serta analisis inferensial untuk mengetahui perbedaan yang signifikan dari rata-rata kemampuan berfikir kritis dan hasil belajar peserta didik yang menggunakan model pembelajaran Discovery Learning dan Reception Learning. Berdasarkan hasil penelitian untuk kemampuan berpikir kritis diperoleh nilai sign (0,000 0,05) maka H0 diterima artinya tidak terdapat perbedaan antara hasil belajar peserta didik yang diajar dengan model pembelajaran Discovery Learning dan Reception Learning. Penelitian ini diharapkan perlu dilakukan penelitian serupa dengan mengembangkan pendekatan dari variabel yang lain dan dapat dilakukan penelitian yang sama tetapi dengan materi yang lain