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The investigation and findings show that the H Bridge variable frequency drive is the optimum choice for resolving intrinsic motor problems and energy conservation. Variable frequency drives outperform other strategies like soft starters because they offer numerous benefits over other techniques, including greater versatility and control over the motor's starting and stopping capabilities. Dynamic torque control, overload protection, and power reduction during idle are other essential aspects of variable frequency drives. Conserving energy to the greatest extent possible is one strategy to avoid energy shortages. It has been reported that 75% of the electrical energy generated globally is used by motors. It has been noted that the main problem with motors is that they use a lot of current to start. As a result, high inrush current produces excessive heat, reducing the lifespan of electrical equipment and using more electricity. Reducing the initial inrush current to a manageable level is advised. By using an induction motor and the H Bridge, this current can be decreased. H Bridge uses a technique known as variable speed drive, which is often referred to as variable torque drive, to control the speed and torque of AC induction motors. Pulse width modulation is used to monitor the motor's voltage and torque in this occurrence. Although there are several methods to reduce the motor's current, such as by employing soft starts, variable torque drives are more advantageous. The strong starting torque and flexible speed control of DC motors make them useful in a range of applications. However, because of the cost and commutation, there are a few significant problems. As a result, the PWM-powered H bridge inverter extends the life of machinery and provides electricity to electrical appliances in response to demand. The fact that it is an energy-saving gadget, however, is by far its greatest advantage. This is especially important in a country like India, where the energy crisis has halted economic growth. [ABSTRACT FROM AUTHOR]

The current state of transmission system design and development is greatly hampered by over voltages caused by lightning. To mitigate over voltage problems, researchers must be nearly obsessive. Since lightning strikes transmission and distribution network components like lines and substations, personnel are also seriously put in danger. Lightning prediction holds great significance, in addition to Lightning Detection Networks (LDNs) that offer ample information regarding lightning activity. Through the use of a fuzzy forecasting system, we are able to determine the chance of lightning in the low, medium, and high range. The method used to forecast lightning threats is provided by this system. [ABSTRACT FROM AUTHOR]

The article presents a study which examined the use of gridded data to predict the yield of wheat in India using the decision support system for agrotechnology transfer (DSSAT) model. Also cited are the factors affecting crop yield like soil type, weather and agronomic management practices, and the model's use of degree day accumulation to determine the phonological development of crops via the crop life cycle.

Paraquat (1,1'-dimethyl-4,4'-dipyridylium) is a liquid herbicide, linked to both accidental and intentional ingestion, which can result in severe and frequently lethal poisoning. It has been known to cause injury to the lungs, kidneys, and liver. We retrospectively reviewed five cases over the last 4 years with a history of paraquat ingestion. The time duration between ingestion and high-resolution computed tomography (HRCT) was assessed. HRCT chest scan was variable, ranging from 4 to 18 days postexposure. The follow-up of the patients was also reviewed., (© Journal of the Association of Physicians of India 2024.)

Background : Malignancy of the breast is one of the most common cancers among females worldwide. Magnetic resonance mammography (MRM) is a valuable complement to conventional methods for the early diagnosis of disease, thereby providing patients with a better prognosis. The number of unnecessary biopsies and repeated excisions in cases of indeterminate breast lesions detected on conventional imaging is high. Aims : The purpose of this study was to evaluate the role of MRM in the evaluation of indeterminate breast lesions [Breast Imaging Reporting and Data System (BIRADS) 3/4] found in conventional mammography and ultrasonography (USG), taking the histopathological examination (HPE) as the gold standard. Materials and methods : A total of 38 patients with conventional radiological imaging diagnosis of indeterminate breast lesions (BIRADS 3/4) were included in this study and evaluated using contrast-enhanced MRM according to the MR-BIRADS lexicon (5th edition). Morphological characteristics of lesions were evaluated to determine the probability of malignancy. Histopathology was kept as the gold standard for comparing all the statistical parameters. Results : There were a total of 40 lesions, 35 masses, and five nonmass enhancement (NME) available for evaluation out of the 38 patients. The sensitivity of margins to detect malignancy approached 100%; however, it had a slightly lower specificity of 66.67%. Magnetic resonance imaging (MRI) showed good diagnostic performance with sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of 85, 90, 89.47, 85.71, and 87.50%, respectively. Conclusion : The MRI has been shown to be useful as a problem-solving tool in breast cancer screening, clarifying indeterminate findings and avoiding unnecessary short follow-ups and percutaneous biopsies. How to cite this article : Mishra E, Kaur N, Kaur R, et al. Role of Magnetic Resonance Mammography in the Evaluation of Indeterminate Breast Lesions. J Assoc Physicians India 2023;71(11):76-84., (© Journal of the Association of Physicians of India 2023.)