Often, when we are looking for a new career, we consider the wages and benefits available. How often have we considered the impact that our career can have on others? Some jobs are designed to show our compassion for our neighbors, provide nurturing when others need it, and even save lives. Here are some top jobs that allow folks to save lives every day. Substance Abuse Counselor The National Center of Health Statistics estimated that over 50,000 people died from a drug overdose in 2015. The statistic’s focus is on hard street drugs to prevent accidental overdoses from non-addicts from skewing the numbers. Considering the substance abuse counselor’s role at facilities like HARP heroin detox & rehab, imagine how many people they may have saved that year! While the statistic does focus on harder drugs, many who opt for rehabilitation are not hardcore drug addicts but rather regular people who have a tough time coping.
Ultrasound waves are acoustic pressure waves that interact with propagation media. Ultrasound visualization is typically based on wave reflectance from regions with different acoustic properties. When a wave meets different acoustic media, part of it transmits further while others reflect. This happens due to different acoustic impedance. The ration between reflected and transmitted energy purely depends on the difference in acoustic impedance in both regions. As you can see each material can be characterized by its acoustic impedance Z which is equal to ultrasound speed v and material density r.
It is more than 100 years when ultrasound is used for analyzing materials and echolocation. A bit later it was adapted for medical diagnostics. Ultrasound became popular and widespread due to the number of benefits. Probably one of the essential features is that it is non-destructive. The other is simplicity and precision. Of course when we talk about price and simplicity we have X-ray or tomography in mind. Ultrasound can be used in many areas and environments. You can measure geometrical properties of internal structures, physical properties like density, tension. In medical diagnostics, ultrasound is mostly used for visualization of tissues and inner organs. Ultrasound waves and parameters Ultrasound waves are mechanical waves that propagate through media. In solid materials, ultrasound waves propagate faster while in liquids and biological tissues slower (~1400 m/s). In air due to low-density sound waves propagate relatively slowly (~340 m/s). Ultrasound speed depends on temperature and pressure.