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匹配条件: “K.V. Ramana Murthy” ,找到相关结果约252292条。
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Recent sightings of the Hawksbill turtle Eretmochelys imbricata (Linnaeus, 1757) on the coast of Northern Andhra Pradesh, India
K.L.N Murthy,K.V. Ramana Murthy
Asian Journal of Conservation Biology , 2012,
Abstract: The coast of Northern Andhra Pradesh has predominantly rocky and sandy shores with sporadic nesting sites of olive ridley turtles Lepidochelys olivacea. However, there have been rare sightings of hawksbill turtles Eretmochelys imbricata along this coast in the past couple of decades and their nesting is seldom observed. Carcasses of two adult hawksbill turtles were observed on 29/12/2010 and 07/03/2011 along the coast of Visakhapatnam in Northern Andhra Pradesh, India. These sightings of dead hawksbill turtles along this coast come recently after a long gap of several years and emphasize on the need to carry out surveys in the area for devising effective long term conservation management strategies.
Design and in vitro evaluation of effervescent gastric floating drug delivery systems of propanolol HCl
Srikanth,M.V; Sunil,S.A; Sreenivasa Rao,N; Janaki Ram,B; Ramana Murthy,K.V;
Investigación Clínica , 2012,
Abstract: the purpose of this research was to develop and evaluate effervescent gastric floating tablets of propranolol hcl. the oral delivery of antihypertensive propranolol hcl was facilitated by preparing an effervescent floating dosage form which could increase its absorption in the stomach by increasing the drug?s gastric residence time. in the present work, effervescent floating tablets were prepared with a hydrophilic carrier such as polyethylene oxide (peo wsr n 60k and peo wsr 303) as a release retarding agent and sodium bicarbonate as a gas generating agent. the prepared tablets were evaluated for all their physicochemical properties, in vitro buoyancy, drug release and rate order kinetics. from the results, p9 was selected as an optimized formulation based on their 12 h drug release, minimal floating lag time and maximum total floating time. the optimized formulation followed first order rate kinetics with erosion mechanism. the optimized formulation was characterized with ftir studies and no interaction between the drug and the polymers were observed.
A VLSI Implementation of Modulo 2n-1Multiplier By Using Radix-8 Modified Booth Algorithm
M. Ashokchakravarthi,,K.V. Ramana Rao
International Journal of Innovative Technology and Exploring Engineering , 2012,
Abstract: A special moduli set Residue Number System (RNS) of high dynamic range (DR) can speed up the execution of very large word-length repetitive multiplications found in applications like public key cryptography. The modulo 2n-1multiplier is usually the noncritical datapath among all modulo multipliers in such high-DR RNS multiplier. This timing slack can be exploited to reduce the system area and power consumption without compromising the system performance. With this precept, a family of radix-8 Booth encoded modulo 2n-1 multipliers, with delay adaptable to the RNS multiplier delay, is proposed. The modulo 2n-1multiplier delay is made scalable by controlling the word-length of the ripple carry adder, k employed for radix-8 hard multiple generation. Formal criteria for the selection of the adder word-length are established by analyzing the effect of varying k on the timing of multiplier components. It is proven that for a given n, there exist a number of feasible values of k such that the total bias incurred from the partially-redundant partial products can be counteracted by only a single constant binary string. This compensation constant for different valid combinations of n and k can be precomputed at design time using number theoretic properties of modulo 2n-1 arithmetic and hardwired as a partial product to be accumulated in the carry save adder tree. The proposed radix-8 Booth encoded modulo 2n-1multiplier saves substantial area and power consumption over the radix-4 Booth encoded multiplier in medium to large word-length RNS multiplication.
Implementation of Multilayer AHB Busmatrix for ARM
E. Raja,K.V. Ramana
International Journal of Soft Computing & Engineering , 2011,
Abstract: The multi-layer AHB busmatrix (ML-AHBbusmatrix) proposed by ARM is a highly efficient on chip bus thatallows parallel access paths between multiple masters and slavesin a system. However, the ML-AHB busmatrix of ARM offers onlytransfer-based fixed-priority and round-robin arbitrationschemes. In this paper, we present one way to improve the arbiterimplementation of the ML-AHB busmatrix. The proposed arbiter,which is Self-motivated (SM), selects one of the nine possiblearbitration schemes based upon the priority-level and the desiredtransfer length from the masters so that arbitration leads to themaximum performance.Our SM arbitration scheme has the following advantages: 1) Itcan adjust the processed data unit; 2) it changes the prioritypolicies during runtime; and 3) it is easy to tune the arbitrationscheme according to the characteristics of the target application.
CONDITION MONITORING AND FAULT DIAGNOSIS OF A COMBUSTION FAN – AN EXPERT SYSTEM APPROACH
TULASI NAGA MALLESWAR PILLI,K.V. RAMANA
Golden Research Thoughts , 2013, DOI: 10.9780/22315063
Abstract: The act of condition monitoring has actually been practiced by plant engineers for generating or estimating, how long a part of the equipment can continue in service until it needs to be shut down for repair using traditional touch, see and hear methods. The applications of computers, electronic measuring and detecting systems have provided a new approach to condition monitoring. The analysis of the information provided by the sensor output is done by using established techniques and interpretation of evaluated output, is then used to establish what actions are to be taken. The use of vibration signals is quite common in the field of condition monitoring of rotating machinery. In this paper, an attempt has been made to monitor the condition of a combustion air fan located at Wire Rod Mill Department in Visakhapatnam Steel Plant, India. The fan unit is supported by four Plummer blocks, two at motor end and the other two at fan end. Using the accelerometer, the velocities at the bearings are recorded and analyzed using ISO 2372 codes for identification of fault/ faults. The fault diagnosis had been supplemented with signatures recorded. Remedial measures are suggested to bring down the intensity of offensive signal. Fault diagnosis has been taken up with the help of an expert system developed in C#.net
Dynamic Power Suppression Technique in Booth Multipliers
B.Rajani Kumari,,K.V. Ramana Rao
International Journal of Innovative Technology and Exploring Engineering , 2012,
Abstract: The SPST has been applied on both the modified Booth decoder and the compression tree of multipliers to enlarge the power reduction. This paper provides the experience of applying an advanced version of our former spurious power suppression technique (SPST) on multipliers for high-speed and low-power purposes. To filter out the use-less switching power, there are two approaches, i.e., using registers and using AND gates, to assert the data signals of multipliers after the data transition. The simulation results show that the SPST implementation with AND gates owns an extremely high flexibility on adjusting the data asserting time which not only facilitates the robustness of SPST but also leads to a 40% speed improvement. Adopting a Xilinx Spartan 3 Xc3s200 board the proposed SPST-equipped multiplier dissipates only 0.0121 mW per MHz in H.264 texture coding applications, and obtains a 40% power reduction and the overall utilization of the resources reduced to 26%.
Image Compression Technique using Two Dimensional Discrete Cosine Transform
S. Rajeswari,,P.Deepthi,,K.V. Ramana Rao
International Journal of Innovative Technology and Exploring Engineering , 2012,
Abstract: This paper presents an architecture for the fast computation of the 8×8 two dimensional (2D) Inverse Discrete Cosine Transform. The proposed method is the permanent storage of the Basis Matrices of the 8×8 2D Discrete Cosine Transform (DCT). The sparseness property of the 2D DCT coefficient matrix, the computational time decreases as the number of nonzero coefficients decreases. The proposed structure computes all 64 pixel luminance values of an 8×8 block simultaneously. The design was implemented in Xilinx Xc3s500 board and the design used 23% LUT’s and 33% of the total slices. The total power consumed by the device was 0.081W.
Implementation of carry-save adders in FPGA
S. Ravi Chandra Kishore,K.V. Ramana Rao
International Journal of Engineering and Advanced Technology , 2012,
Abstract: —The addition operations can be optimized through aspecial purpose carry propagation logic in most of the FPGAs.The delay is same for small size operands and this redundantadders require more hardware resources than carry propagateadders. Therefore, carry-save adders are not usually implementedon FPGA devices, although they are very useful in ASICimplementations. In this paper we have showed that it is possibleto implement redundant adders with a hardware cost close to thatof a carry propagate adder. Redundant adders are clearly fasterfor 16 bits and bigger word lengths and have an area requirementsimilar to carry propagate adders. Among all the redundantadders studied, the 4:2 compressor is the fastest one, presents thebest exploitation of the logic resources within FPGA slices and theeasiest way to adapt classical algorithms to efficiently fit FPGAresources. This design aimed to be implemented in Spartan-3EFPGA. The CSA architecture uses 1215 LUT’s out of available3840 and 96 IO blocks and the average fan-out of non clock netsis 4.73 and the peak memory usage is 148 MB.
Neural Network Based Classification and Diagnosis of Brain Hemorrhages
K.V.Ramana M.Tech,Raghu Korrpati
International Journal of Artificial Intelligence and Expert Systems , 2010,
Abstract: The classification and diagnosis of brain hemorrhages has work out into a great importance diligence in early detection of hemorrhages which reduce the death rates. The purpose of this research was to detect brain hemorrhages and classify them and provide the patient with correct diagnosis. A possible solution to this social problem is to utilize predictive techniques such as sparse component analysis, artificial neural networks to develop a method for detection and classification. In this study we considered a perceptron based feed forward neural network for early detection of hemorrhages. This paper attempts to spot on consider and talk about Computer Aided Diagnosis (CAD) that chiefly necessitated in clinical diagnosis without human act. This paper introduces a Region Severance Algorithm (RSA) for detection and location of hemorrhages and an algorithm for finding threshold band. In this paper different data sets (CT images) are taken from various machines and the results obtained by applying our algorithm and those results were compared with domain expert. Further researches were challenged to originate different models in study of hemorrhages caused by hyper tension or by existing tumor in the brain.
Trust Aware Load Distribution in a Data Grid Environment
Ms. Shaik Naseera,Dr. K.V.Madhu Murthy
International Journal on Computer Science and Engineering , 2010,
Abstract: The basic idea of a load balance system is to transfer partial of system workload from busy nodes to some idle nodes. The target resource selection for task migration is a key factor in the load balance strategy. As grid is dynamic in nature, resources may join or leave the grid at any instance of time. It's inefficient to select a target resource that often leaves the grid and hence the tasks may be rescheduled for several times. When the cost of load transmission is not negligible, the overhead of the load balancing strategy will be unacceptable. In such dynamic grid environment, the cost of propagating system load will be extremely high. To improve the efficiency of the load balancing process, one can select trustworthy resources from the list of available resources. In this paper we present a load distribution strategy that considers the trustworthiness of the resource as a benchmark for participation in the load balancing process. The simulation results show that the load distribution among the trustworthy resources results better system throughput compared to load distribution to all available resources in the grid.
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