Study of entrance channel effects on pre-equilibrium emissions in proton and alpha induced reactions on 64Ni: Basic pre-equilibrium parameters

294-297The effect of entrance channel on the relative strength of pre-equilibrium emission, basic pre-equilibrium parameters, excitation functions for proton and alpha induced reactions on 64Ni have been analyzed over the energy range from threshold up to 40 MeV. The results have been compared with the theoretical cross-sections calculated by means of the code EMPIRE3.2.3-MALTA and TALYS 1.

Study of entrance channel effects on pre-equilibrium emissions in proton and alpha induced reactions on 64Ni: Basic pre-equilibrium parameters

The effect of entrance channel on the relative strength of pre-equilibrium emission, basic pre-equilibrium parameters, excitation functions for proton and alpha induced reactions on 64Ni have been analyzed over the energy range from threshold up to 40 MeV. The results have been compared with the theoretical cross-sections calculated by means of the code EMPIRE3.2.3-MALTA and TALYS 1.

POTENTIAL PHYTOCONSTITUENTS FROM NATURAL PRODUCTS FOR COMBATING AGAINST CORONAVIRUS DISEASE-19 (SEVERE ACUTE RESPIRATORY SYNDROME CORONAVIRUS‐2) - A REVIEW

Coronavirus called as coronavirus diseases (COVID)-19 (severe acute respiratory syndrome coronavirus [SARS‐CoV]‐2) is a viral infection which is spreading to a great extent and affecting many people worldwide, many developed and developing countries are severely affected by the virus. The World Health Organization (WHO) is taking serious preventive measures to stop this viral infection worldwide. The coronavirus is a big threat to human beings and controlling the emerging viral infections is a global concern. Antiviral drug such as Remdesivir has been approved by the FDA, but combating against these viral infections is a great challenge to scientists and researchers with the available few antiviral drugs due to severe side effects and toxicity. Many drugs such as hydroxy chloroquin, Remdesivir, and vaccines have been recommended for combating this virus. Few Polyherbal formulations and Ayurvedic formulations containing antiviral phytoconstituents have been recommended to boost the immunity. Some drugs and phytoconstituents are under different phases of human clinical trials. The currently available synthetic drugs and vaccines for the treatment of viral infections have severe side effects. Medicinal plants play a critical role in treating viral infections by developing immunity against viral diseases. Some medicinal plants which were used as antipyretic, analgesic, and anti-inflammatory activity helped in treating various diseases and viral infections. Many plants contain flavonoids such as quercetin, luteolin, apigenin, and polyphenols such as thymoquinone, phytosteroids such as cucurbitacin and others which may likely to act as antioxidants and immunomodulatory that can fight against COVID-19. The current review provides information on phytochemical constituents present in medicinal plants, their mechanism of action, in silico molecular docking studies and human clinical trials to treat viral disorders

A Constraint Programming and Hybrid Approach to Nurse Rostering Problems

This paper describes a decision support methodologies for nurse rostering problem in a modern hospital environment. In particular, it is very important to efficiently utilise time and effort, to evenly balance the workload among people and to attempt to satisfy personnel preference. We presented a complete model to formulate all the complex real-world constraints, solution approach and Hybrid approaches to nurse rostering problem. DOI: 10.17762/ijritcc2321-8169.15037

Active LC Clamp dv/dt Filter for Voltage Reflection due to Long Cable in Induction Motor Drives

This paper presents an active LC clamped dv/dt filter to mitigate the over voltages appearing across the motor terminals. The over voltages at motor terminal is due to voltage reflection effect of long motor cable connected between high frequency PWM inverter having high dv/dt switching waveforms and ac motor drives. The voltage reflection due to fast switching transients can be reduced by increasing the rise time and fall time of inverter output voltage pulses. The most commonly available mitigating technique is a passive dv/dt filter between inverter and cable.  Since, size, cost and losses of passive LC dv/dt filter is more, an active dv/dt filtering technique is used to reduce over voltage at motor terminals. Active LC clamp filtering technique used here consists of a small LC filter designed for a single motor cable length which can be used for any lengths of cable up to 1000m only by changing the active control of the PWM pulses to achieve the desired voltage slope during voltage transition period. The basic principle of active dv/dt filer used here is to charge and discharge the capacitor in the filter with modified PWM pulses to increase the rise time and fall time of output voltage pulses without any extra devices to handle the transient response of the LC filter. Detailed investigation is carried out by simulation using MATLAB-Simulink software with active control of common LC clamp dv/dt filter suitable for various cable lengths ranging from 100 m to 1000 m. Comparative analysis is done with active dv/dt filter designed with a common LC clamp filter and active LC clamp dv/dt filter designed for various cable lengths and also with diode clamped passive dv/dt filter. The results proves the effectiveness of the active common LC dv/dt filter to mitigate the over voltages at motor terminal for cable lengths up to 1000m

Low Speed Estimation of Sensorless DTC Induction Motor Drive Using MRAS with Neuro Fuzzy Adaptive Controller

This paper presents a closed loop Model Reference Adaptive system (MRAS) observer with artificial intelligent Nuero fuzzy controller (NFC) as the adaptation technique to mitigate the low speed estimation issues and to improvise the performance of the Sensorless Direct Torque Controlled (DTC) Induction Motor Drives (IMD). Rotor flux MRAS and reactive power MRAS with NFC is explored and detailed analysis is carried out for low speed estimation. Comparative analysis between rotor flux MRAS and reactive power MRAS with PI as well as NFC as adaptive controller is performed and results are presented in this paper. The comparative analysis among these four speed estimation methods shows that reactive power MRAS with NFC as adaptation mechanism shows reduced speed estimation error and actual speed error at steady state operating conditions when the drive is subjected to low speed operation. Simulation carried out using MATLAB-Simulink software to validate the performance of the drive especially at low speeds with rated and variable load conditions

Electrochemical Investigations of Sydnone Derivatives at Glassy Carbon Electrode

Electrochemical reduction of the –N=N– moiety of sydnone derivatives, like 3-phenyl sydnone, tolyl sydnone and anisyl sydnone, was studied using cyclic voltammetry at a glassy carbon electrode. In acid medium, the above compounds were found to show irreversible electrochemical charge transfer in the pH range studied. Electrochemical studies of these sydnones were carried out in partially aqueous media containing organic co-solvents such as acetonitrile, dimethylformamide, methanol and dimethylsulphoxide. Physical parameters such as the charge transfer coefficient and diffusion coefficient, as well as the effects of variation of the electroactive species concentration, sweep rate, organic solvents, and pH on peak parameters were studied. The reduced products were characterized by IR, NMR and mass spectral studies. The effect of surfactants on the electrochemical reduction of 3-phenyl sydnone was studied using cationic, anionic and non-ionic surfactants