General theory of cylindrical vibrations tubes. Part IV. Uncoupled torsional vibrations of open tubes

Based on the ease in satisfying the free edge boundary conditio/I, open tubes are classified into two types, A and B. Type B tubes have more complicated free-edge boundary condition than that of type A tubes. An alternate formulation is evolved for type B tubes; this makes the free-edge boundary condition as simple as in type A tubes. A simply-supported open tube with the cross-section given by p=S/2π sin 2πS/S, is analysed exactly as well as by using approximation equations; errors in using the first order approximation equations are discussed. A simply-supported open tube of I-section, representative of type B tubes, is analysed by using first and second approximation equations

On Brewster's bands. Part I

The paper considers the explanation of Brewster's bands and other allied phenomena from the new and very suggestive standpoint proposed by schuster (Phil. Mag. Oct. 1924). When monochromatic light is reflected by or transmitted through two parallel plates in succession, we have a superposition of the haidinger ring-systems due to the two plates in the sense that the observed intensity in any given direction is the product of the intensities due to either plate separately. Illustrations showing the effect of such superposition in various cases are reproduced with the paper, differential and summational fringe-systems of various orders being observable. When non-homogeneous light is used, the Haidinger rings disappear and along with them also the superposition pattern, leaving only a uniform illumination in the field, except in the special case of the differential system of the first order for two plates of equal thickness. A simple geometrical explanation is thus forthcoming why Brewster's bands can be observed even in non-homogeneous light with thick plates in this case

General theory of vibrations of cylindrical tubes

The equations governing torsional vibrations of unstiffened cylindrical tubes have been presented. Methods proposed in Part I are illustrated by considering the torsional vibrations of doubly symmetric tubes. An exact solution of a simply supported tube with the boundary of the cross section given by p=s/2π cos 2π S/S is presented. A free- free tube of rectangular cross section is analysed by using first order approximation equations and the results are in good agreement with earlier work

General theory of cylindrical vibrations tubes. Part V. Uncoupled flexural vibrations of open tubes

Based on the simplicity in satisfying free-edge boundary condition, open tubes vibrating injlexural mode are classified as type C and type D. Compared to type D tubes, type C tubes have relatively simpler free-edge boundary condition. An alternate formulation is developed for type D tubes in which the satisfaction of the free-edge condition is as simple and direct as in type C tubes. Analysis of type C tubes is very similar to that of closed tubes. In this paper we study the flexural vibration characteristics of a simply-supported lipped-I-section which is a typical open tube of type D

General theory of vibrations of cylindrical tubes. PART-III. Uncoupled flexural vibrations of closed tubes

Flexural vibration characteristics of unstiffened doubly symmetric cylindrical tubes are studied using the theory proposed by the authors in part I. An exact solution of a simply supported tube with the cross-section given by x= s2/4π2 sin 2πS/S is presented. Natural frequencies of a 'simply supported tube of rectangular cross-section are obtained by using first and second order approximation equations. Numerical results indicate that it is essential to consider, at least, second order approximation equations to study the flexural vibration characteristics of doubly symmetric tubes

Feature Selection for Gabor Filter Based on Level Measurement using Non-Interacting Tanks Level Images

Level measurement models using image-based classifiers (pixel-based datasets) are used for estimation purposes. Pre-processing is thought-provoking in proceeding out the image filter technique and classifying the level. The level scenario of a two non-interacting tank system plays a vital role in predicting the level. Level monitoring is done using the supervised learning method using instance-based filters (Gabor Filter) and selected base classifiers for level measurements. The main scope of this case study is to improve the level measurements from the two non-interacting tank scenarios using Artificial Intelligent algorithms. The suggested article includes the finest feature selection process to increase the accuracy performance attained by the designated classifiers like IBK Instance base classifier for different neighbourhood values and Tree category algorithm like Random Forest. The performance accuracy in level prediction obtained is 81.356%, the weighted Average of Receiver operator characteristics of (ROC) 0.931 are obtained by Random Forest Tree Category Classifie

Quantitative Assessment of Program Outcomes Using Longitudinal Data from the FE Exam

There have been many studies providing details on using results from the Fundamentals of Engineering (FE) exam as metrics for meeting ABET program outcomes1. However, implementing an FE-based set of metrics poses challenges not limited to assessing validity of results. Programs using FE-based metrics must also determine the position of the metrics in the overall assessment process. We present a method for using FE-based metrics as an integral part of the ABET program assessment process. The principle issues we address are: (1) The validity of using FE metrics for a group of graduating students when not all of them take the exam; (2) Establishing and quantifying levels of performance; and (3) Creating a trigger mechanism for taking action based upon longitudinal results. The Department of Mechanical and Biomedical Engineering at Boise State University created a process which integrates metrics from the FE results with other metrics in our loop for outcomes assessment and continuous improvement. Our process prevents us from taking inappropriate action based upon isolated negative results from the FE exam. We have used our process to make a demonstrable improvement in our curriculum. Two examples of faculty action taken due to unsatisfactory and questionable results from the FE metric before our last ABET visit are presented and discussed

Dissolution rates of various brands of proton pump inhibitors in combination with domperidone: an in vitro study

Background: Drug solubility, bioavailability, and dissolution rates are important in establishing in vivo efficacy. Eight brands of domperidone proton pump inhibitor combination drugs were compared to enable physicians to take an informed decision regarding the dissolution rates of various domperidone-PPI combinations available in the Indian market to allow identification and prescription of the drug with better bioavailability. Methods: The in vitro dissolution rate of a combination of domperidone-PPI drugs was measured using the United States Pharmacopeia dissolution paddle apparatus. Each flask of the dissolving testing apparatus contained one tablet and 900 mL of the media, which was dissolved in pure water with 1% Tween® stored at 37.4°C. At regular intervals, aliquots were removed, filtered, and the amount of drug released was measured. The cumulative drug release was calculated using a standard formula. Results: P04 and P07 had the fastest and the slowest onsets of action, respectively. P01 (Omez DSR) and P08 exhibited the longest and the shortest durations of action, respectively. The P05, P06, and P08 formulations had greater particulate matter than the other formulations. Under in vitro conditions, the bioavailability of Omez DSR was nearly two-fold higher than P07 and five-fold higher than P08. Conclusions: Although P04 exhibited the fastest onset of action, Omez DSR had the longest duration of action, superior bioavailability, and ensured the rapid and continuous release of domperidone. Omez DSR demonstrated superior properties compared with other brands

Laparoscopic management of large ovarian cysts

Background: Large ovarian cysts are conventionally managed by laparotomy. This study was undertaken to assess the feasibility and outcome of laparoscopic surgery for the management of large ovarian cysts.Methods: Thirty-eight patients from January 2014 to December 2016, presumed to be large ovarian cyst were managed laparoscopically. Preliminary evaluation suggestive to be of benign ovarian cyst by history, clinical examination, sonographic imaging and basic serum marker were only included in this study. The cysts were aspirated initially followed by cystectomy, oophorectomy or total hysterectomy depending on age, parity, coexisting pathology and desire for future fertility.Results: Out of 38 cases, 6 were non-ovarian adnexal masses. 8 out of rest 32 cases presented with pain due to torsion were managed on emergency basis, rest of the cases were operated electively. Mean operating time was 90 minutes. Mean size of the cyst was 16 cms. One cases of borderline malignancy were detected and the rest showed benign pathology. Three of the cases required mini Laprotomy for specimen removal. Most of women were successfully treated laparoscopically without any complications and conversion to laparotomy was required in 3 cases.Conclusions: With proper patient selection and exclusion of malignancy, laparoscopic management of large ovarian cyst by general gynecologist is feasible