Mach number distribution on blade to blade surface of a turbine stator pasage

Mach number distribution on the blade to blade surface l was computed at the hub, mean and tip sections of a stator' blade using the computer program COMPBLADE. These results,; were used to plot i so-Mach contours on the blade to blade surface and surface velocity distribution as a function- of fractional surface length. The results have been presented`' in this report

Guaranteeing Convergence of Iterative Skewed Voting Algorithms for Image Segmentation

In this paper we provide rigorous proof for the convergence of an iterative voting-based image segmentation algorithm called Active Masks. Active Masks (AM) was proposed to solve the challenging task of delineating punctate patterns of cells from fluorescence microscope images. Each iteration of AM consists of a linear convolution composed with a nonlinear thresholding; what makes this process special in our case is the presence of additive terms whose role is to "skew" the voting when prior information is available. In real-world implementation, the AM algorithm always converges to a fixed point. We study the behavior of AM rigorously and present a proof of this convergence. The key idea is to formulate AM as a generalized (parallel) majority cellular automaton, adapting proof techniques from discrete dynamical systems

Constructive Multiuser Interference in Symbol Level Precoding for the MISO Downlink Channel

This paper investigates the problem of interference among the simultaneous multiuser transmissions in the downlink of multiple antennas systems. Using symbol level precoding, a new approach towards the multiuser interference is discussed along this paper. The concept of exploiting the interference between the spatial multiuser transmissions by jointly utilizing the data information (DI) and channel state information (CSI), in order to design symbol-level precoders, is proposed. In this direction, the interference among the data streams is transformed under certain conditions to useful signal that can improve the signal to interference noise ratio (SINR) of the downlink transmissions. We propose a maximum ratio transmission (MRT) based algorithm that jointly exploits DI and CSI to glean the benefits from constructive multiuser interference. Subsequently, a relation between the constructive interference downlink transmission and physical layer multicasting is established. In this context, novel constructive interference precoding techniques that tackle the transmit power minimization (min power) with individual SINR constraints at each user's receivers is proposed. Furthermore, fairness through maximizing the weighted minimum SINR (max min SINR) of the users is addressed by finding the link between the min power and max min SINR problems. Moreover, heuristic precoding techniques are proposed to tackle the weighted sum rate problem. Finally, extensive numerical results show that the proposed schemes outperform other state of the art techniques.Comment: Submitted to IEEE Transactions on Signal Processin

Symbol Based Precoding in The Downlink of Cognitive MISO Channels

This paper proposes symbol level precoding in the downlink of a MISO cognitive system. The new scheme tries to jointly utilize the data and channel information to design a precoding that minimizes the transmit power at a cognitive base station (CBS); without violating the interference temperature constraint imposed by the primary system. In this framework, the data information is handled at symbol level which enables the characterization the intra-user interference among the cognitive users as an additional source of useful energy that should be exploited. A relation between the constructive multiuser transmissions and physical-layer multicast system is established. Extensive simulations are performed to validate the proposed technique and compare it with conventional techniques.Comment: CROWNCOM 201

Drug utilization of antibiotics in post-operative cesarean section inpatients in tertiary care hospital: a prospective observational study

Background: The aim of this study is to evaluate the pattern and rational use of antibiotics in post-operative caesarean section (CS) inpatients in tertiary care teaching hospital, BIMS Belagavi.Methods: This cross sectional prospective observational study was conducted from December 2019 to February 2020, prior permission from institutional ethics committee was taken. Detailed data of post-operative caesarean section (CS) inpatients including age, diagnosis, line of management, complications and any adverse effects if occurred during the study was collected and entered in a specially designed proforma and MS word excel and analyzed by descriptive statistics like percentage.Results: Total 100 post-operative caesarean section inpatients were involved in the study. Most common indication for C-section was cephalopelvic disproportion. Average no of antibiotics per prescription was 3.32. Most commonly prescribed antibiotic was cefotaxime (27.71%) followed by gentamycin (25.90%) and metronidazole (24.59%). Majority (90%) of patients who admitted for ≤3 days (66%) had received combination antibiotic i.e., cefotaxime, metronidazole and gentamycin. IV fluids (21.21%) and analgesics (13.13%) were most frequently prescribed concomitant drugs. Majority (97.8%) of patients received parenteral preparation. 306 antibiotics (92.17%) used were from national model list of essential medicines (NLEM) and 332 antibiotics (100%). used were by generic name. Polypharmacy was 7.92.Conclusions: Cefotaxime was the most frequently prescribed antibiotic. Most of the antibiotics prescribed was rationally from NLEM and were by generic name