International Journal of Advances in Engineering Sciences
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159 research outputs found
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Comparative Study of the Function Overloading and Function Overriding Using C++
No full textIn the Object-Oriented Programming Systems (OOPS), these two concepts namely function overloading and function overriding are a bit confusing to the programmers. In this article this confusion is tried to be removed. Both of these are the concepts which come under the polymorphism (poly means many and morph mean forms). In the article the comparison is done in between them. For the new programmers and the learners, it is important to understand them. The function overloading [1] is achieved at the time of the compile and the function overriding is achieved at the run time. The function overriding always takes place in inheritance, but the function overloading can also take place without inheritance
Analysis for Kinematic Modeling linearized Railway wheelset Dynamics
No full textContact conditions change at the railway track surface due to the presence of contaminations which cause the low adhesion levels creating serious challenges for the tracking and braking control systems in the wheel slip/slide problems. Here the model is based on the method for the adhesion limit and creep force analysis to overcome the wheel problems in the defer contact conditions. Thus the relation of adhesion and creep with each other and impact upon wheel-set contact is observed in kinematic mode of dynamic analysis. The linearity and changes in the interaction are compared by a set of linear creep/slip curves. In this paper contact dynamics of various wheel-set parameters like velocity of wheelset and co-efficient of creep applied upon various damping and frequency are calculated and simulated in spline 3-D environment of graphics by matlab
Low Power Comparator Design -A Review
No full textOne of the most important analog circuits required in many analog integrated circuits is comparator. It is used for the comparison between two same or different electrical signals. The Comparator design becomes an important issue when design technology is scaled down. Due to the non-linear behaviour of threshold voltage (VT) when design technology is scaled down, performance of Comparator is most affected. Many versions of comparator are proposed to achieve desirable output in sub-micron and deep sub-micron design technologies. The selection of particular topology is dependent upon the requirements and applications of the design. Low power circuit design has emerged as a principal theme in today’s electronics industry. In this paper comparator architecture their design parameter, study about offset voltage and sources of power and their estimation and reduction technique are discussed. This paper help the practising engineers/ beginners in this field, able to know what are the significant parameters to design low power dynamic latched comparator and its use in various applications
File System Design Approaches
No full textIn this article, the file system development design approaches are discussed. The selection of the file system design approach is done according to the needs of the developers what are the needed requirements and specifications for the new design. It allowed us to identify where our proposal fitted in with relation to current and past file system development. Our experience with file system development is limited so the research served to identify the different techniques that can be used. The variety of file systems encountered show what an active area of research file system development is. The file systems may be from one of the two fundamental categories. In one category, the file system is developed in user space and runs as a user process. Another file system may be developed in the kernel space and runs as a privileged process. Another one is the mixed approach in which we can take the advantages of both aforesaid approaches. Each development option has its own pros and cons. In this article, these design approaches are discussed
Structural and Optical Studies of Polyamide-66/CaCO3 Composites
No full textThis article addresses the effect of micro and nano-CaCO3 on the structural, morphology and optical properties of polyamide-66. Nano-size of CaCO3 was synthesized by microemulsion technique. The material was characterized by XRD, FTIR and UV-VIS techniques. XRD results of composites suggested that CaCO3 particles are found in the amorphous phase of the semi-crystalline thermoplastic and α-crystalline form is thermodynamically more stable than the γ-crystalline forms at room temperature. FT-IR confirmed the chemical structure of the PA66 showing absorptions for all required chemical groups: N-H stretch at 3305.52 cm-1, C-H stretch at 2865.02-2936.45 cm-1, Amide-I at 1638.76 cm-1, and Amide-II at 1539.55 cm-1. UV-VIS data showed that addition of CaCO3 particles in PA66, results in the decrease of energy-band gaps of the composites
Schemes for Improving Energy Efficiency of Wireless Sensor Networks: A Review
No full textWireless sensor networks called WSNs, serves the purpose of sensing the environment. They are connected by wireless link and are referred as nodes and are small and battery operated, operation of these nodes take place in hostile condition and thus replacement and recharging is difficult. So energy conservation is prime importance. Clustering, data aggregation and optimal routing are the basic techniques used to increase the lifetime of the network. This paper discusses different significant schemes and protocols which have been proposed till now and makes an overall comparison among them based on several parameters like network lifetime, energy efficiency, power efficiency, multi hop data transmission, Â average delay etc
Comparison of Seismic Performance of Solid and Hollow Reinforced Concrete members in RCC framed Building using ETABS Software
No full textHollow (Box-type) reinforced concrete beams and columns help in decreasing superstructure weight and hence seismic mass is minimized as compared to conventional solid reinforced concrete beams and columns. ETABS is commonly used to analyses: Skyscrapers, parking garages, steel concrete structures, low and high rise buildings, and portal frame structures. The case study in this paper mainly emphasizes on structural behavior of R.C.C. framed building having hollow and solid reinforced concrete members. Modelling of 3-storey R.C.C. framed building is done on the ETABS software for analysis. Post analysis of the structure, maximum shear forces, bending moments, and maximum storey displacement are computed and then compared for all the analyzed cases. The results indicated that the drop in storey shear, overturning moment etc. in case of hollow members as compared to solid members in R.C.C. framed building
Effect of milling time on morphology and mechanical properties of Al-Mg/Al2O3 nanocomposite powder produced by mechanical alloying
No full textThe effect of milling time on the microstructure and mechanical properties of Al and Al–10 wt.% Mg matrix nanocomposites reinforced with 10 wt.% Al2O3 during mechanical alloying was investigated. Steady-state situation was occurred in Al–10Mg/10Al2O3 nanocomposite after 20 h, due to solution of Mg into Al matrix, while the situation was not observed in Al/10Al2O3 nanocomposite at the same time. For the binary Al–Mg matrix, after 20 h, the average crystallite size was 25 nm. Up to 20 h, the lattice strain increased to about 0.67% for Al–Mg matrix.By milling for 10 h the large increase in microhardness (190 HV) for Al–Mg matrix nanocomposite was caused by grain refinement and solid solution formation. From 10 to 20 h, slower rate of increasing in microhardness, and at 20 h micro hardness reach ( 201 HV).Â
RF-MEMS Devices’ Taxonomy
No full textThe instrumentation and controls in the fields like defense, aerospace, electronics and communication continually needs for novel technologies and developments. Radio frequency microelectromechanical systems (RF-MEMS) technology shows remarkable potential over the years. It has already made its charisma felt significantly by providing replacement in electronics and communication systems with large quality factors and defined tunability. The RF-MEMS devices and components have emerged as potential candidates for modern applications in the different fields. The center theme of this paper is to classify the different RF-MEMS devices under the different domains. This research paper also highlights the fact that the limitations faced by the current RF devices can be overcome by the flexibility and better device performance characteristics of RF-MEMS components. This paper reviews the importance of RF-MEMS, their salient features, and possible applications
Low Voltage High Speed Current Comparators
No full textIn this paper a low voltage and high speedcurrent comparator is described using FVF(Flipvoltage follower).Its features include short responsedelay, low power consumption, low power supplyand small chip area. This circuit will allow asignificant speed improvement in system leveldesigning. This paper also describes related works ofexisting current comparators