The Trump administration says the cities shouldn’t be penalized for unhealthy air because pollution can blow in from abroad. Some experts say that’s preposterous. By Hiroko Tabuchi A research lab in ...

Climate change is a critical issue facing us all. The enormity of the situation can seem overwhelming but we believe a collective effort of small steps can make a massive difference. Which is why ...

Abstract: This study aims at a sound field calculation for the spherical-section phased array and an optimization algorithm for the focus patterns of phased array ultrasound surgery. An efficient ...

To calculate your tax payable, you need to complete Step 5 of your section 217 return. Your tax payable includes the surtax for non-residents and deemed residents of Canada. All schedules are included ...