Amplification of Fluctuations in Unstable Systems with Disorder

We study the early-stage kinetics of thermodynamically unstable systems with quenched disorder. We show analytically that the growth of initial fluctuations is amplified by the presence of disorder. This is confirmed by numerical simulations of morphological phase separation (MPS) in thin liquid films and spinodal decomposition (SD) in binary mixtures. We also discuss the experimental implications of our results.Comment: 15 pages, 4 figure

Modified digital space vector pulse width modulation realization on low-cost FPGA platform with optimization for 3-phase voltage source inverter

The realization of power electronic applications on hardware is a challenging task. The digital control circuit strategies are used to overcome the analog control strategies by providing great flexibility with simple equipment and higher switching frequencies. In this manuscript, an area optimized, modified digital space vector (DSV) pulse width modulation is designed and realized on low-cost FPGA. The modified digital space vector pulse width modulation (DSVPWM) uses a phase-locked loop (PLL) to generate clocks using the digital clock manager (DCM). These DCM clocks are used in the DSVPWM module to synchronize the other sub-modules. The voltage generation unit generates the three-phase (3-Ф) voltages and is used in the alpha-beta generation and sector determination unit. The reference active vectors are made by the reference generation unit and used in switching time calculation. The PWM pulses are generated using switching time generation, and lastly, the dead time occurrence unit generates the final SVPWM gate pulses. The modified DSVPWM is synthesized and implemented on Spartan-3E FPGA. The modified DSVPWM utilizes 17% slices, works at 102.45 MHz, and consumes 0.070 W total power. The simulation results and the resource utilization of modified DSVPWM are represented in detail. The modified DSVPWM is compared with existing PWM approaches on different Spartan-series FPGAs with better chip area improvemen

Bistability in the sunspot cycle

A direct dynamical test of the sunspot-cycle is carried out which indicates that a stochastically forced non-linear oscillator characterizes its dynamics. The sunspot series is then decomposed into its eigen time-delay coordinates. The analysis of these coordinates reveals that the sunspot series exhibits bistability, and suggests the possibility of modeling the solar cycle as a stochastically and periodically forced bistable oscillator, accounting for the Poloidal and Toroidal modes of the solar magnetic field. Such a representation of the sunspot series in terms of stochastic bistable dynamical system enables us to conjecture stochastic resonance as the key mechanism in amplifying the planetary influence of Jupiter on the sun, and that extreme events, due to turbulent convection noise inside the sun, dictate crucial phases of the sunspot cycle, such as the Maunder minimum.Comment: 6 pages, 6 figure

Foreign competition for shares and the pricing of information asymmetry: evidence from equity market liberalization

Using the equity market liberalization of 23 emerging market countries between 1996 and 2006, we examine how the degree of competition for a firm's shares affects the price of information asymmetry. We find evidence of a significant decline in the pricing of information asymmetry as countries remove regulatory restrictions on foreign ownership. Our study provides novel evidence on the link between the degree of competitiveness of equity markets and the price of information asymmetry. The work also furthers our understanding of the economic consequences of foreign stock ownership

Antimicrobial susceptibility pattern of bacterial isolates in patients of chronic suppurative otitis media in a tertiary care hospital in India

Background: Chronic suppurative otitis media (CSOM) is a massive public health problem in developing countries like India, especially among low socio-economic class because of malnutrition, overcrowding, poor hygiene, inadequate health care and recurrent upper respiratory tract infections. CSOM cases unless managed effectively may land into various complications such as persistent otorrhoea, hearing impairment, mastoiditis, labyrinthitis, facial nerve paralysis to more serious intracranial abscesses.Methods: The study was carried out in a tertiary care hospital from January 2017 to December 2017 with an aim to determine the microbiological profile of ear discharge in patients suffering from CSOM and their antimicrobial susceptibility pattern using Kirby Bauer disc diffusion method.Results: Out of 630 samples processed, 407 (64.6%) samples were culture positive. Most common organism isolated was Pseudomonas spp. (43.2%) followed by S. aureus (39.1%). Most of isolates recovered were multidrug resistant.Conclusions: Management of CSOM consists mainly of eradicating infection and closure of tympanic membrane. Periodic monitoring of bacterial isolates and their antibiotic susceptibility pattern is necessary for administering appropriate antibiotics as empirical treatment and also helps in reducing the potentially disabling and fatal complications of CSOM

Women\u27s Schooling, Home Teaching, and Economic Growth

The hypothesis that increases in the schooling of women enhance the human capital of the next generation and thus make a unique contribution to economic growth is assessed on the basis of data describing green revolution India. Estimates are obtained that indicate that a component of the significant and positive relationship between maternal literacy and child schooling in the Indian setting reflects the productivity effect of home teaching and that the existence of this effect, combined with the increase in returns to schooling for men, importantly underlies the expansion of female literacy following the onset of the green revolution

Influence of sheep manure, vermicompost and Azotobactor sp. on growth and yield of ajowan (Trachyspermum ammi Sprague)

A field experiment was conducted at Ajmer (Rajasthan) to study the influence of sheep manure,vermicompost and bio-fertilizer on growth and yield of ajowan (Trachyspermum ammi). Theexperiment consisted of 16 treatments comprising of three levels of sheep manure (5.0, 7.5,and 10.0 t ha-1), three levels of vermicompost (2, 3, and 4 t ha-1) and recommended fertilizerdose (90 kg N, 40 kg P2O5 and 30 kg K2O ha-1) with and without Azotobactor  sp. and control.The results revealed that application of Azotobactor sp. alone and with sheep manure,vermicompost and recommended fertilizer dose resulted in higher growth parameters, yieldattributes and yield of ajowan over control. Increasing levels of sheep manure (5.0, 7.5 and10.0 t ha-1) and vermicompost (2, 3, and 4 t ha-1) exhibited higher yield over their respectivelower doses. The highest seed (16.35 q ha-1), stover (33.14 q ha-1) and biological yield (49.49 qha-1) of ajowan was obtained with application of sheep manure @ t 10 ha-1 with Azotobactorsp. &nbsp

Women\u27s Schooling, Home Teaching, and Economic Growth

The hypothesis that increases in the schooling of women enhance the human capital of the next generation and thus make a unique contribution to economic growth is assessed on the basis of data describing green revolution India. Estimates are obtained that indicate that a component of the significant and positive relationship between maternal literacy and child schooling in the Indian setting reflects the productivity effect of home teaching and that the existence of this effect, combined with the increase in returns to schooling for men, importantly underlies the expansion of female literacy following the onset of the green revolution

Frequent Financial Reporting and Managerial Myopia

Using the transition of US firms from annual reporting to semi-annual reporting and then to quarterly reporting over the period 1950-1970, we provide evidence on the effects of increased reporting frequency on firms’ investment decisions. Estimates from difference-in-differences specifications indicate that increased reporting frequency is associated with an economically large decline in investments. Additional analyses reveal that the decline in investments is most consistent with frequent financial reporting inducing myopic management behavior. Our evidence informs the recent controversial debate about eliminating quarterly reporting for US corporations

Response to commentaries: (de)normalization of drinking and its implications for young people, sociality, culture and epidemiology

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