207 research outputs found
Atomic absorbers for controlling pulse propagation in resonators
We consider pulse propagation through a Fabry-Perot cavity with silver mirrors that contain macroscopic samples of resonant absorbers. We show that the pulse velocity can be tuned from subluminal to superluminal in a strongly coupled atom-cavity system. We delineate the effects of the interplay of cavity and absorbers. We demonstrate the saturation effects of pulse advancement with increasing mirror thickness and atomic damping
The use of hyperbaric oxygen therapy in actinomycotic osteomyelitis associated florid cemento osseous dysplasia: report of a familial case.
Florid Cemento-Osseous Dysplasia (FCOD) is a well recognized fibro-osseous disease of the jaws commonly seen
in the middle aged African women, although it may occur in the Caucasians and Asians. There is a reported incidence of less than 2% in the Indian population.
The clinical and the radiographic features of FCOD may overlap with features of chronic diffuse scle-rosing osteomyelitis, which makes diagnosis of the disease difficult in symptomatic cases. Moreover the jaws may be susceptible to osteomyelitis, which may mask the underlying FCOD in some cases.
The case reported here is that of a 56 year old Indian female patient with long standing FCOD invol-ving the maxilla and the mandible, who was asymptomatic till all her teeth were extracted for fabrica-tion of complete dentures.
The patient experienced symptoms of pain, swelling and purulent discharge soon after the use of dentures and
was treated by surgical removal of the affected bone. The same symptoms recurred in other areas of the jaw over
a period of time and these areas were treated surgica-lly. The patient subsequently presented with pain in the mandibular left posterior region of ten days duration, and was diagnosed as FCOD with superimposed Actinomycotic
Osteomyelitis based on his-topathology and Gram’s stain, and was treated by surgical removal of the affected bone
followed by hyperbaric oxygen therapy (HBO). The radiograph of the surgical site showed good amount of bone
regeneration within six months of HBO therapy without recurrence of the FCOD in the same area till date
Management of Acute Liver Failure: A Pediatric Perspective
This article is made available for unrestricted research re-use and secondary analysis in any form or be any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemicPurpose of review: Pediatric acute liver failure is a rare, complex, rapidly progressing, and life-threatening illness. Majority of pediatric acute liver failures have unknown etiology. This review intends to discuss the current literature on the challenging aspects of management of acute liver failure.
Recent findings: Collaborative multidisciplinary approach for management of patients with pediatric acute liver failure with upfront involvement of transplant hepatologist and critical care specialists can improve outcomes of this fatal disease. Extensive but systematic diagnostic evaluation can help to identify etiology and guide management. Early referral to a transplant center with prompt liver transplant, if indicated, can lead to improved survival in these patients.
Summary: Prompt identification and aggressive management of pediatric acute liver failure and related comorbidities can lead to increased transplant-free survival and improved post-transplant outcomes, thus decreasing mortality and morbidity associated with this potential fatal condition
SARAS 2: A Spectral Radiometer for probing Cosmic Dawn and the Epoch of Reionization through detection of the global 21 cm signal
The global 21 cm signal from Cosmic Dawn (CD) and the Epoch of Reionization
(EoR), at redshifts , probes the nature of first sources of
radiation as well as physics of the Inter-Galactic Medium (IGM). Given that the
signal is predicted to be extremely weak, of wide fractional bandwidth, and
lies in a frequency range that is dominated by Galactic and Extragalactic
foregrounds as well as Radio Frequency Interference, detection of the signal is
a daunting task. Critical to the experiment is the manner in which the sky
signal is represented through the instrument. It is of utmost importance to
design a system whose spectral bandpass and additive spurious can be well
calibrated and any calibration residual does not mimic the signal. SARAS is an
ongoing experiment that aims to detect the global 21 cm signal. Here we present
the design philosophy of the SARAS 2 system and discuss its performance and
limitations based on laboratory and field measurements. Laboratory tests with
the antenna replaced with a variety of terminations, including a network model
for the antenna impedance, show that the gain calibration and modeling of
internal additives leave no residuals with Fourier amplitudes exceeding 2~mK,
or residual Gaussians of 25 MHz width with amplitudes exceeding 2~mK. Thus,
even accounting for reflection and radiation efficiency losses in the antenna,
the SARAS~2 system is capable of detection of complex 21-cm profiles at the
level predicted by currently favoured models for thermal baryon evolution.Comment: 44 pages, 17 figures; comments and suggestions are welcom
An Efficient Score level Multimodal Biometric System using ECG and Fingerprint
Biometric system is a security system that uses human’s unique traits to identify and authenticate the user. Biometrics refers to biological traits of a human that are often categorized as physiological traits like fingerprint, iris, face and behavioral characteristics like signature style, voice and typing rhythm. The Biological signals like Electrocardiography (ECG), Electromyography(EMG), and Electroencephalography (EEG) have not been explored to biometric applications as their scope was limited to medical applications only. Recent survey suggests that these biological signals can be explored as a part of the biometric application. The main objective of this paper is to explore the possibility of using the ECG as a part of multimodal biometric. ECG has lower accuracy but fusing it with a traditional biometric like fingerprint yields a higher accuracy rate and it is really difficult to spoof the system. The proposed multimodal biometrics system has an accuracy of 98% with the false acceptance rate of 2% and almost 0% of false rejection rate
Detection of seedborne grain mold fungi in sorghum and their control with fungicidal seed treatment
Seeds of mould resistant sorghum cultivars IS 8545 and PVK 801, as well as those of the susceptible cultivars Bulk Y, SPV 104 and CSH 9 were used to investigate the nature of the seedborne nature of the predominant mould fungi infecting sorghum. Alongside this, the efficacy of thiram and Bavistin [carbendazim] SD and ST in controlling seed mould fungi was determined. Infection of seed coat, endosperm and embryo of sorghum was due to Fusarium verticillioides and Curvularia lunata [Cochliobolus lunatus]. Infection of plant tissues was lower in resistant than susceptible cultivars. Infection by C. lunata and F. verticillioides ranged from 20 to 84% and from 12 to 74%, respectively. All the fungicide treatments reduced the grain colonization by mould fungi in cultivars Bulk Y, SPV 104, IS 8545 and PKV 801 compared to the control. Seed treatment with thiram reduced seed infection by C. lunata, whereas seed treatment with bavistin reduced seed infection by F. verticillioides. Reduction in grain mould infection resulted in a 4 to 47% increase in grain yield
Structural, Optical and Magnetic Properties of (In0.90Sn0.05Cu0.05)(2)O-3 Nanoparticles
This study examined structural, optical and magnetic properties of ITO (In0.95Sn0.05)(2)O-3 and Cu doped ITO (In0.90Sn0.05Cu0.05)(2)O-3 nanoparticles synthesized by solid state reaction method. The synthesized nanoparticles were subjected to structural, optical and magnetic studies. The structural properties of the nanoparticles were carried out using XRD, Raman, FT-IR characterization techniques. Optical properties of the samples were studies using UV-Vis-NIR spectrophotometer. The magnetic measurements were carried out using vibrating sample magnetometer. The ITO (In0.95Sn0.05)(2)O-3 nanoparticles exhibited room temperature ferromagnetism with clear hysteresis loop. The strength of magnetization decreased in Cu doped ITO (In0.95Sn0.05)(2)O-3. The ITO nanoparticles were also exhibited ferromagnetism at 100 K with a magnetic moment of 0.02 emu/g
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