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'AC-on, AC-off' mileage tests mandatory for new cars from next April

Starting next April, all car manufacturers will be required to perform fuel-efficiency and mileage tests for new vehicle models under two conditions: with the air-conditioning system turned on and with it turned off, according to a notification issued by the road transport ministry on Sunday. For existing models, manufacturers may be granted a few additional months to comply with the new testing requirements, TOI has learnt. The move is aimed at providing customers with more realistic and...

Times of India 8d ago

Novel Strip-like Readout Geometries in Resistive AC-coupled Silicon Detectors (RSD / AC-LGAD)

Announce Type: new Abstract: Resistive Silicon Detectors (RSD/AC-LGAD) are novel silicon detectors capable of both precise spatial and temporal resolution. Such sensors will be essential for the next generation of particle colliders (EIC, FCC-ee, CEPC, FCC-hh) and would enable the possibility of a 4D tracker. RSD sensors are typically fabricated with a pixel-like geometry that provides excellent spatial resolution in the x and y directions.

arXiv Physics 9d ago

Physics-Informed Graph Learning Acceleration for Large-Scale AC-OPF with Topology Changes

arXiv:2606.05772v1 Announce Type: new Abstract: In power systems, alternating current optimal power flow (AC-OPF) has been a challenging problem for decades due to its nonconvexity, but fast and efficient solutions are even more needed because of high penetration of large scale renewable generation and load growth. Recently, neural networks (NN) have gained attention in solving AC-OPF, but it is still in an early stage to be applicable for real and large-scale power system operation with...

arXiv CS 5d ago

As ACs run nonstop in 45°C heat, are Delhi homes facing a growing fire hazard?

As temperatures across Delhi-NCR climb past 45 degrees Celsius, air-conditioners are now running almost constantly in homes, apartments and residential societies. In this extreme heat, another problem is quietly showing up inside these spaces: The risk of AC-related fires. What usually begins as a basic attempt to beat the summer heat can sometimes spiral into something far more dangerous.

Times of India 10d ago

Exploring Converter Control Duality in Microgrids: AC Grid-Forming vs DC Droop Control

Announce Type: replace Abstract: Power electronic converters are fundamental building blocks of both AC and DC microgrids, enabling the integration of renewable energy sources, energy storage systems, electronic loads, and electric vehicles. In contrast, converter control in DC microgrids has developed along the path of droop control, which is widely adopted for decentralized DC-bus voltage regulation and power sharing. Although these control strategies share certain characteristics, their...

arXiv CS 1d ago

Voltage Unbalance-Aware AC Optimal Power Flow in Distribution Networks

arXiv:2606.06167v1 Announce Type: new Abstract: The increasing penetration of single-phase loads and distributed generation exacerbates voltage unbalance (VU) in distribution grids, raising concerns about power quality and complicating network operation. However, most market-clearing models and price-based coordination frameworks do not enforce VU limits within a three-phase AC representation, so the implications for grid-code compliance, numerical scalability, and economic signals remain...

arXiv CS 5d ago