ETD at Indian Institute of Science
(528 recursos)
Repository of Theses and Dissertations of Indian Institute of Science, Bangalore, India. The repository has been developed to capture, disseminate and preserve research theses of Indian Institute of Science.
Mostrando recursos 1 - 6 de 6
1.
Throughput Enhancement of TCP over Wireless Links - Gupta, Pawan Kumar
The congestion control mechanisms of Transmission Control Protocol (TCP) are very effective in providing best effort service in wired networks, where packet losses are mainly due to congestion in the network. In wireless mobile networks, more often than not, loss of packets is because of corruption of data on the wireless link. The TCP sender responds to these losses as if they are due to congestion, by reducing its congestion window, thereby reducing the rate of flow of packets. The reduction in congestion window is a necessity when network is experiencing congestion to avoid congestion collapse but it is not...
2.
Some Investigations on QoS in the Wireline-Wireless Network Interface Zone - Tewari, Maneesh
In the next generation of networks we will begin to see the true convergence of voice, multimedia, and data traffic. This merging of various dedicated networks will occur both in the wired and wireless domains. Given the growth in the areas of wireless voice and data, we see that the combination of mobile and Internet communication constitutes the driving force behind the third-generation wireless system and makes the basis for the fourth-generation wireless system. For services like voice over IP over wireless (VoIPoW), the main challenge is to achieve QoS and spectrum efficiency. In order to support better QoS the...
3.
Current-Mode Techniques In The Synthesis And Applications Of Analog And Multi-Valued Logic In Mixed Signal Design - Bhat, Shankaranarayana M
The development of modern integration technologies is normally driven by the needs of digital CMOS circuit design. Rapid progress in silicon VLSI technologies has made it possible to implement multi-function and high performance electronic circuits on a single die. Coupled with this, the need for interfacing digital blocks to the external world resulted in the integration of analog blocks such as A/D and D/A converters, ?lters and oscillators
with the digital logic on the same die. Thus, mixed signal system-on-chip (SOC) solutions are becoming a common practice in the present day integrated circuit (IC) technologies.
In digital domain, aggressive technology scaling rede?nes,...
4.
Modelling Of Switched Mode Power Converters : A Bond Graph Approach - Umarikar, Amod Chandrashekhar
Modelling and simulation are essential ingredients of the analysis and design process in power electronics. It helps a design engineer gain an increased understanding of circuit operation. Accordingly, for a set of specifications given, the designer will choose a particular topology, select component types and values, estimate circuit performance etc. Typically hierarchical modelling, analysis and simulation rather than full detailed
simulation of the system provides a crucial insight and understanding. The combination of
these insights with hardware prototyping and experiments constitutes a powerful and
effective approach to design.
Obtaining the mathematical model of the power electronic systems is a major task before any...
5.
System Dynamics Modeling Of Stylized Features Of Stock Markets - Hariharan, R
The common theme throughout the thesis is to explore the possibility of using a single framework, namely the systems theory framework, in modeling a few stylized features of a financial market. A systems theoretic model is developed, in this thesis in Chapter 3, for confidence bias of an individual. The effect of this bias on his investment decision is brought out explicitly. The phenomenon of excessive trading, arising due to overconfidence and optimism, has been explained. The concept of virtual capital, incorporating the ideas from prospect theory, is introduced. We have proposed a dynamical system framework to model limits to...
6.
Computer Assisted Evaluation Of Student Performance In An Engineering Course - Sindhu, R
Increasing enrollment of students and declining availability of qualified and experienced faculty are leading to increased assessment loads of the existing faculty. Moreover, the assessment techniques are changing drastically due to the ever-increasing demand of new knowledge and abilities from the students. The tools offered by information technology can now be effectively used in enhancing the productivity of a teacher. This thesis proposes a mechanism for creating both summative and formative assessment instruments for a course in an engineering program. The assessment instruments will vary widely in nature depending on the subject. With increasing prevalence of digital devices in all...
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