Mass-ratio dependent strong-field dissociation of artificial helium hydride isotopologues

We study the effect of the nuclear-mass ratio in a diatomic molecular ion on the dissociation dynamics in strong infrared laser pulses. A molecular ion is a charged system, in which the dipole moment depends on the reference point and therefore on the position of the nuclear center of mass, so that the laser-induced dynamics is expected to depend on the mass asymmetry. Whereas usually both the reduced mass and the mass ratio are varied when different isotopologues are compared, we fix the reduced mass and artificially vary the mass ratio in a model system. This allows us to separate effects related to changes in the resonance frequency, which is determined by the reduced mass, from those that arise due to the mass asymmetry. Numerical solutions of the time-dependent Schrödinger equation are compared with classical trajectory simulations. We find that at a certain mass ratio, vibrational excitation is strongly suppressed, which decreases the dissociation probability by many orders of magnitude

Simulations of a weakly conducting droplet under the influence of an alternating electric field

We investigate the electrohydrodynamics of an initially spherical droplet under the influence of an external alternating electric field by conducting axisymmetric numerical simulations using a charge-conservative volume-of-fluid based finite volume flow solver. The mean amplitude of shape oscillations of a droplet subjected to an alternating electric field for leaky dielectric fluids is the same as the steady-state deformation under an equivalent root mean squared direct electric field for all possible electrical conductivity ratio $(K_r)$ and permittivity ratio $(S)$ of the droplet to the surrounding fluid. In contrast, our simulations for weakly conducting media show that this equivalence between alternating and direct electric fields does not hold for $K_r \ne S$. Moreover, for a range of parameters, the deformation obtained using the alternating and direct electric fields is qualitatively different, i.e. for low $K_r$ and high $S$, the droplet becomes prolate under alternating electric field but deforms to an oblate shape in the case of the equivalent direct electric field. A parametric study is conducted by varying the time period of the applied alternating electric field, the permittivity and the electrical conductivity ratios. It is observed that while increasing $K_r$ has a negligible effect on the deformation dynamics of the droplet for $K_r<S$, it enhances the deformation of the droplet when $K_r>S$ for both alternating and direct electric fields. We believe that our results may be of immense consequence in explaining the morphological evolution of droplets in a plethora of scenarios ranging from nature to biology.Comment: 10 pages, 8 figure

A clinical study of arrhythmias associated with acute myocardial infarction and thrombolysis

Background: Arrhythmias are a common occurrence in ACS. This study was undertaken to analyze the incidence, frequency and type of arrhythmias in relation to the site of infarction to aid in timely intervention to modify the outcome in MI and to study the significance of Reperfusion arrhythmias.Methods: 100 patients were evaluated. ECG and cardiac enzymes were studied. Arrhythmias complicating AMI in terms of their incidence, timing, severity, type, relation, reperfusion and results were studied.Results: Of the 100 cases, 74% were males and 26% females of which incidence being common between 4th to 7th decades of life. AMI was common in patients with Diabetes and Hypertension (23% each). Incidence of AWMI (58%) is higher than IWMI (40%). Out of all arrhythmias, Ventricular Tachycardia was seen in 24% cases with 50% mortality and preponderance to Antero Lateral Myocardial Infarction. Sinus Tachycardia was seen in 23% of cases with preponderance to Antero Lateral Myocardial Infarction and persistence of Sinus Tachycardia was a prognostic sign, mortality being 22%. Complete Heart Block and Sinus Bradycardia were seen with IWMI, incidence being 53.8% and 100% respectively. Bundle Branch Block was common in AWMI (31%) than IWMI (10%). Among 64 thrombo-lysed cases, 21 had Reperfusion Arrhythmias without any mortality, whereas remaining 43 without Reperfusion Arrhythmias had mortality of 18.6%.Conclusions: According to the study, Tachy-arrhythmias are common with Anterior Wall Myocardial Infarction and Brady-arrhythmias in Inferior Wall Myocardial Infarction. Reperfusion Arrhythmias are a benign phenomenon and good indicator of successful reperfusion

Case series of orthopaedic complications associated with endocrine disorders presented at tertiary care center and review of literature

Endocrine glands affecting skeletal system are parathyroid glands, adrenal glands, pituitary gland, thyroid and gonads. If any abnormality occurs in these glands, they cause structural and functional impairment of the skeletal system. Early diagnosis and treatment of these endocrine problems and ruling out musculoskeletal involvement helps to maintain skeletal integrity and prevent osteoporotic fractures and chronic bone pathologies. Here we present a case series of 4 patients who came to us with chronic bone pathologies or post-traumatic fractures associated with endocrine abnormalities­; such as parathyroid adenoma (hyperparathyroidism), Cushing’s syndrome and thyroid adenocarcinoma. One patient with osteoporotic and pathological fracture was managed operatively and sent for management of endocrine pathology and other three patients after evaluating cause for the bone pathology were referred for primary management of endocrine disease. Osteoclasts and osteoblasts of the bone are affected by the endocrine hormones, such as parathyroid hormone, thyroid, glucocorticoids and gonadotropins. Any abnormality in these hormones leads to alteration of bone mineral density. Hyperthyroidism, glucocorticoid excess, hyperparathyroidism, hypogonadism, and acromegaly decrease bone mineral density and aggravate the osteoporotic tendencies and leading to orthopaedic complications. As an orthopaedic practitioner we should be well aware of endocrine disorders affecting bones. Early diagnosis and treatment of these endocrine problems in older patients helps to maintain their skeletal integrity, prevent osteoporotic fracture and orthopaedic complications

Measurement of Body Mass Index (BMI) using PIC 18F452 Microcontroller

The aim of the project was to design a microcontroller based automated Body Mass Index (BMI)calculator with LCD display, which calculates the body mass index using the two basic parameters that are weight and height. The hardware of the project consists of a weighing mechanism i.e. weighing machine, which is used to calculate the body weight of a person, and a height sensing mechanism i.e. LDR, which is use to calculate the height of a person. The weight of the person is calculated in Kilograms and the height in meters in accordance of the BMI standard formula [3]. The microcontroller based automated Body Mass Index calculator is a useful device when it comes to controlling your weight and maintaining a healthy life style. The calculated weight of the person through weighing machine, converts the mechanical force into electrical signals that can be easily obtain after processing through microcontroller. While the height of the person is calculated by the LDR , when dark light falls on it the resistance value decreases and we get high voltage at output. All this data is manipulated through microcontroller and then the result is displayed on the LCD display and a message is sent through GSM module to the person about his BMI and the suggestions related to it. DOI: 10.17762/ijritcc2321-8169.16049

Motion-preserving technologies for degenerative lumbar spine: The past, present, and future horizons

Over the past few decades, remarkable advancements in the understanding of the origin of low-back pain and lumbar spinal disorders have been achieved. Spinal fusion is generally considered the “gold standard” in the treatment of low-back pain; however, fusion is also associated with accelerated degeneration of adjacent levels. Spinal arthroplasty and dynamic stabilization technologies, as well as the continuous improvement in diagnosis and surgical interventions, have opened a new era of treatment options. Recent advancements in nonfusion technologies such as motion-preservation devices and posterior dynamic stabilization may change the gold standard. These devices are designed with the intent to provide stabilization and eliminate pain while preserving motion of the functional spinal unit. The adaption of nonfusion technologies by the surgical community and payers for the treatment of degenerative spinal conditions will depend on the long-term clinical outcome of controlled randomized clinical studies. Although the development of nonfusion technology has just started and the adoption is very slow, it may be considered a viable option for motion preservation in coming years. This review article provides technical and surgical views from the past and from the present, as well as a glance at the future endeavors and challenges in instrumentation development for lumbar spinal disorders. © 2011 SAS - The International Society for the Advancement of Spine Surgery. Published by Elsevier Inc. All rights reserved

Training Manual GOI-UNDP-GEF Sponsored Training Programme Dealing with Marine mammals stranding in India

Marine mammals – such as whales, dolphins, porpoises and sea cows have long been considered to be some of the most spectacular and majestic mega fauna on earth. For generations, they have captured the attention and imagination of people and cultures all over the world. Despite their beauty and the awe they inspire, virtually every species of marine mammal is listed as threatened or endangered, largely due to the direct and indirect impacts of human activities. Hundreds of years of aggressive hunting, combined with habitat destruction, marine noise, chemical pollution and increased shipping traffic have reduced populations to just a fraction of their original numbers. Several species are facing imminent extinction. In recent years, there is increasing awareness of the integral importance of marine mammals to healthy aquatic ecosystems, and of the growing threats that a variety of human activities pose to these animals and their environments

Accelerated oxidation of cotton cellulose in presence of reducing substances-I

(1) The measurement of oxidation potential of dilute solutions of sodium hypochlorite has been carried out at 30&#176;C. by a method used successfully by various investigators. (2) The values of the oxidation potential at 30&#176;C. are higher than those at 20&#176;C. The differences in the potentials become more and more marked with reduction in the pH of the hypochlorite solution. (3) A correction of pH&#215;0.06 volts to the measured potentials at 30&#176;C. does not show any maximum value over the pH region examined. A sharp change in the direction of pH-corrected oxidation potential curve, however, occurs at about the same pH at which a maximum is obtained at 20&#176;C. (4) There exists no similarity between the corrected oxidation potential-pH curve at 30&#176;C. and a curve showing relation between oxygen uptake or fluidity and pH at 30&#176;C. Nabar, Scholefield and Turner had shown a striking resemblance between these curves at 20&#176;C