Simulation study of particle tracking system

A particle tracking system is being developed in the Particle Technology Laboratory of the Mechanical Engineering Department, at NJIT, In this thesis, an attempt is made to understand the effect of various parameters on the errors in the computed position and orientation of the sphere being tracked. Simulation results for a single transmitter assembly as well as a three transmitter assembly with 6, 9 and 17 antennae are presented. The effects of the level of noise in the voltages on the solution for the single transmitter assembly and three transmitter assembly are discussed. The concept of virtual antenna is introduced and experimental results as well as simulations results using the virtual antennae are presented. Simulation results showing the advantages of techniques such as perturbations and extrapolation in the solution code are discussed. The effects of antenna shape, size and aspect ratio on the voltages are studied, A new calibration technique for reducing the systematic errors in the measured voltages is proposed. The accuracy of the particle tracking system is confirmed by a test in which the sphere containing the transmitter is dropped in a free fall and the gravitational constant is calculated

Tools for the design of flexible manufacturind systems

Flexibility in manufacturing systems can broaden the horizons for a company. But the means for achieving it are far more critical. This trend is created by the increase in competitiveness, growth of technology along with demand variations, more customization, and short product life cycles. But Flexible Manufacturing Systems to most of the manufacturers sounds like a synonym for automation. A real Flexible Manufacturing System is designed when every unit of the company is synchronized in such a way to respond in a harmony to any changes that come against it. Fine-tuning of each and every part of the company is essential to make the company profitably sustainable to any internal or external changes. This research aims at realizing real flexibility in the company. It aims at bringing out the bottlenecks, the issues that a company owns and tries to solve them in a feasible way so as to make the company more and more self-reliant, countering all the external and internal changes that occur during its time. A process of conducting Flexibility audit is described in thesis, which is a powerful tool when, used methodically with the FM design process (Figure 3.1), The data gathered from audit is analyzed to identify factors contributing to inflexibility and to resolve them in a feasible innovative way. This philosophy when applied continuously over a period of time can build immunity against the change shock or the adjustment time

Chloramphenicol induced maculopapular rashes

Chloramphenicol is a broad spectrum antibiotic that acts by inhibiting protein synthesis. Though systemic use is rare, their topical preparations are commonly used. Allergic reaction due to chloramphenicol ear drops are less reported. Here, we have reported a maculopapular exanthema due to use of chloramphenicol ear drops

Histomorphological study of vesiculobullous lesions of skin: a study of 66 cases at tertiary care center

Background: Wide variety of pathological processes can lead to development of vesiculobullous eruptions over the body. They may occur in many dermatoses which include various inflammatory, infective, autoimmune, drug induced as well as genetic conditions. Each entity of vesiculobullous lesion has similar or confusing clinical features but different histopathological morphology outcome. However, these disorders are still associated with substantial morbidity, considerable mortality and impaired quality of life. Histopathological examination is helpful in definitive diagnosis of vesiculobullous disorder which is very essential for specific treatment and an appropriate desirable outcome. Aim was to study and classify various vesiculobullous lesions of the skin. Methods: It was a hospital based prospective and retrospective study conducted for a period from January 2016 to July 2019 in the department of pathology at Government medical college, Surat, Gujarat. Total of 66 patients, aged 3-70 years with vesiculobullous lesions of both sexes attending the department of dermatology were selected and analysed clinically. The specimens were routinely processed and hematoxylin and eosin stained slides were studied. Results: In the present study, majority of patients presented between 41-50 years of age (32%) with male to female ratio of 1.08:1. Pemphigus vulgaris constituted the most common vesiculobullous disorder (30.30%) followed by pemphigus foliaceous (24.24%) followed by bullous pemphigoid (15.05%). Bullae were located intra epidermally in (36%+24.78%) and sub epidermally in 24% of the patients. Conclusions: Thorough histopathological workup and clinical correlation is essential to confirm diagnosis of vesiculobullous lesions of skin

Random Sampling in Reproducing Kernel Subspace of Mixed Lebesgue Spaces

In this article, we consider the random sampling in the image space $V$ of mixed Lebesgue space $L^{p,q}(\mathbb{R}^{n+1})$ under an idempotent integral operator. We assume some decay and regularity conditions of the kernel and approximate the unit sphere in $V$ on a bounded cube $C_{R,S}$ by a finite-dimensional subspace of $V$. Consequently, the set of concentrated functions is totally bounded. We prove with an overwhelming probability that the random sample set uniformly distributed over $C_{R,S}$ is a stable set of sampling for the set of concentrated functions on $C_{R,S}$. Moreover, we propose an iterative scheme to reconstruct the concentrated signal from its random measurements.Comment: Communicate

When Does It Make Sense to Acquire a Single Weapon System Design That Can Be Used in Both Manned and Unmanned Operational Modes

There is a strong push to change from manned toward both unmanned and optionally manned systems within the Department of Defense. There are significant open questions about how the manned versus unmanned versus optionally manned options influence costs, adaptability, operational utility, and suitability for missions. The Institute for Defense Analyses developed an approach to address these questions that links underlying physical attributes and engineering relationships to mission attributes and costs. We discuss this approach, where it fits into the acquisition process, and how it can be used to quantitatively inform the unmanned versus optionally manned discussions at both a system level and fleet level.Naval Postgraduate School Acquisition Research Progra

Optical Waveguide for Measurement Application

The chapter provides the analysis of the behaviour of Mach Zehnder interferometer waveguide (MZIW) sensing structure and establishes the general design principles. Photonics interferometers have been widely used because of their highly sensitive detection technique. The present study is based on the MZIW structure for sensing application and deals with interferometer single-mode transmission. Theoretically, short wavelength and high difference in index (Δη) results in the low depth of the evanescence wave and increase in sensitivity. MZIW under consideration is very small in size hence it is very difficult to guide the light into waveguide. The output monitor detection sensitivity of the entire MZI structure depends on light-guiding efficiency. To maintain minimum losses at various micro-branches of the entire MZIW structure, effective light propagation is important and it is a critical parameter of the entire interferometer. Various tests have been carried out to study the effects of the Y branch angle variation on light guiding into the MZIW structure especially in measurement application

Cost variation analysis of ACE inhibitors in India

Background: Cardiovascular diseases are the most prevalent cause of death and disability in developed and developing countries. There is a wide variation in the prices of antihypertensive drugs marketed in India. Thus, a study was planned to find out variation in cost in the ACE Inhibitors available in India either as a single drug or in combination and to evaluate the difference in cost of various brands of the same ACE Inhibitors and ARBs by calculating percentage variation in cost in Indian rupees.Methods: Minimum and maximum costs in rupees (INR) of antihypertensive agents manufactured by different companies, in the same strength and dosage forms were obtained from “current index of medical specialties” January April 2016 and Drug Today October-December 2016. The cost ratio and percentage cost variation were calculated for each generic antihypertensive agent (ACE Inhibitors and ARBs).Results: This study shows that there is a wide variation in the prices of different brands of same ACE Inhibitors and ARBs in Indian market.Highest cost variation 400% is for Lisinopril (2.5mg), followed by Enalapril (10mg) 394.16%, Telmisartan (20mg) 322.22%.Conclusions: There is a wide difference in the cost of different brands of ACE Inhibitors and ARBs available in India. They have important role in management of hypertension particularly if associated with other morbidities like diabetes. The clinicians prescribing these drugs should be aware of these variations in cost so as to reduce the cost of drug therapy and increase the patient adherence to the therapy