ACAS is being used to describe short-range systems intended to prevent actual metal-on-metal collisions. In contrast, ASAS is being used to describe longer-range systems used to maintain standard en route separation between aircraft (5 nm {9.25 km} horizontal /1000' {305 m} vertical). Obstacle Collision Avoidance System is a ground based system that uses a low powered radar mounted on or near the obstacle. 2  The radar detects aircraft in the proximity of the obstacle and firstly warns aircraft via flashing medium intensity lights and secondly warns aircraft of the obstacle via a VHF broadcast.
Biotechnology - applied science that is concerned with biological systems, living organisms, or derivatives thereof, to make or modify products or processes for specific use. Botany - the scientific study of plants. Cell biology - the study of cells at the microscopic or at the molecular level. It includes studying the cellsâ physiological properties, structures, organelles, interactions with their environment, life cycle, division and apoptosis. Chronobiology - a science that studies time-related phenomena in living organisms.
Botanists study plants to try to understand how these processes work. Their research is involved in enhancing crops, developing medicines, cleaning up contaminated sites, and even powering our cars. It's an exciting field on the cutting edge of the clean energy economy. It's also a profession for nature lovers. Some botanists study how plants relate to their natural communities. The work of these plant ecologists helps conserve endangered species and natural areas. Regardless of the specialty, we all benefit from their work. Simply put, botany is the study of plants.