26 research outputs found
Hybrid lunar inflatable structure
No full textBefore man had even stepped foot on the lunar surface, the idea of establishing a base was discussed extensively, be it in science fiction or academia. Although, to this day there has not been an actual base on the Moon, many studies have been conducted regarding design possibilities and environmental impacts. There exists a prevalent challenge in regards to the predictability of the effects the lunar environment has on surface structures. This thesis discusses those aspects of lunar habitats and proposes a new design concept.M.S.Includes bibliographical referencesby Rohith Dronadul
IMPLEMENTATION AND DESIGN OF 64 BIT REVERSIBLE ALU
No full textArea, delay, power are the major factors which effect the performance of today’s digital revolution. Power dissipation is one of the most common problem in digital circuits, many low power methodology techniques are been implemented to reduce power dissipation but still the ease of optimizing the design power is left behind. So here we consider, Reversibility which plays an important role in power consumption. Reversible logic reduces the power by preventing the loss of information. This paper proposes design of 64 bit ALU. This ALU consists of nine operations, four arithmetic and five logical operations. The arithmetic operations include addition, subtraction, multiplication, division and the logical operations include XOR, NOT, OR, NAND, AND. All the modules were designed using reversible logic gates where the divider circuit uses adder/sub module in doing division. All the modules are designed for n-bit operations. Initially n was taken as 16 bit and all the modules were tested in NEXYS 4 DDR board, based on FPGA from XILINX , Then the n is assigned as 64 bit operations .We were unable to implement 64 bit operations directly on FPGA because there were no resources to implement 64 bit operations .So we implemented 16 bit operations on the board and verified simulations for 64 bit operations. But these can also deal with n-bit operations. The delay and power analysis of various modules are performed along with comparison tables are carried out in this design
Exploiting multi-path for safeguarding mmWave communications against randomly located eavesdropper
No full textCommunication in the millimeter-wave (mmWave) band has enabled giga-bit-per-second data rates for next generation wireless systems. To this end, physical layer security techniques have emerged as a simple and yet effective way to safeguard these systems against eavesdropping attacks. These techniques make use of the large antenna arrays available in mmWave systems to provide an array gain at the target receiver and obfuscate the signal at the eavesdropper. Despite their effectiveness, majority of these techniques are based on line-of-sight communication links between the transmitter and the receiver, and may fail in the presence of blockages or non-line of-sight links. In this project, we propose a new physical layer security technique to safeguard communication systems against randomly located eavesdroppers. Numerical results demonstrate the effectiveness of proposed technique and show that higher secrecy rate can be obtained when compared to recently proposed techniques
Dependence of equilibrium stacking fault width on thickness of Cu thin films: A molecular dynamics study
No full textApplications of Fixator-norator Pair in Companion Model Based Designs
No full textAbstractThis paper presents a novel approach to the accurate time domain analysis and design of analog circuits containing storage elements by making use of ‘companion models’. The emphasis is given to the design using fixator-norator pair, which is now ingenious in analog circuit design. The Backward Euler method can render a storage element to an equivalent circuit, containing only linear components viz. current source or voltage source and resistance. This distinctive feature allows us to generate equivalent companion models of the storage elements for every time step, whereby persuading the application of fixator-norator pairs in such circuits containing reactive components. This paper briefly explains the construction of equivalent circuits at desired time steps and provides a detailed explanation on the design of the gain of an op-amp differentiator for a given input by exploiting the fixator-norator method. The proposed method reveals to be much reliable and accurate in the design of circuits containing reactive elements
Mid infrared spectroscopic imaging and tomography
No full textFourier Transform Infrared (FT-IR) Spectroscopic Imaging is an optical technique that simultaneously provides morphological (two dimensional) and mid-infrared spectral (one dimensional) information for a specimen under observation. In this dissertation, we develop a new instrument that extends the capabilities of FT-IR imaging to provide three dimensional morphological information along with mid-infrared spectral information on the microscopic length scale. We first demonstrate that spectroscopic information from the mid-infrared can be used to perform histologic recognition and cancer detection in prostate, breast and skin cancer tissues. These studies utilize FT-IR imaging data of thin tissue slices from several hundred patients. The segmentation algorithms and instrumentation used are described in detail. We perform a rigorous analysis of instrumentation and data so as to understand the limits and limitations of current state-of-the-art instrumentation. We then propose a new instrument that adds a new dimension of information to current instruments and establish the new state-of-the-art in mid-infrared imaging. The theoretical basis of such instrumentation is presented in detail and techniques for visualization of four dimensional data are outlined.Item withdrawn by Alexis Thompson ([email protected]) on 2013-02-21T21:53:07Z
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University of Illinois Theses & Dissertations (ID: 1)
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Draft_thesis_8w.pdf: 42631683 bytes, checksum: 360f99c66ac2828c1b3f22bdcb7f998e (MD5)Made available in DSpace on 2013-05-28T19:18:36Z (GMT). No. of bitstreams: 2
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license.txt: 4062 bytes, checksum: b0c50edd2966f9135f5ce3bd13743c87 (MD5)Item marked as restricted to the 'Administrator' Group (id=1) by Seth Robbins ([email protected]) on 2013-05-28T19:21:31Z
Item is restricted until 2015-05-28T19:21:22ZRestriction data tranferred 2014-07-01T11:16:35-05:00
Original Data
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Release Date: 2015-05-28 14:21:22 UTC
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 44734 on 2015-05-28T10:01:02Z
In vitro studies of graphene oxide reinforced hydroxyapatite nanobiocomposite on human erythrocytes
No full textGrowth and characterization of divalent transition metal ions doped zinc hydrogen phosphate single crystals
No full textRetracted: When a giant ovarian cyst poses a diagnostic dilemma
No full textThe article " When a giant ovarian cyst poses a diagnostic dilemma" is retracted by the Editor-in-Chief, on the request of corresponding author and co-authors. The corresponding author informed that the patient described in this article, although willingly gave her consent for revealing her clinical data for publication, later withdrew her consent after knowing about the publication of clinical material during she came for a follow up visit
