Once you submit your renewal fee, you will receive an e-mail confirmation of your payment. The e-mail will also be accessible on your list of communications. The payment of your MDCB renewal fee will maintain your Certified Medical Dosimetrist (CMD) credential in good standing. Renewal fees received after December 31 will be subject to a late fee of $50 in addition to the $125 renewal fee. CMDs who do not renew before January 31 risk losing the CMD credential.
1-Wheel (One of most useful inventions for mankind) Look around, you will not find anything which has no connection with wheel. Wheel is the part and parcel of each machine in this modern era. The early wheel was simple wooden disk with a hole for axle. The oldest form of wheel was used in Mesopotamia.
Top 10 Inventions of the Middle Ages. The middle ages (5th â 15th Centuries AD), often termed The Dark Ages, were actually a time of great discovery and invention. The Middle ages also saw major advances in technologies that already existed, and the adoption of many Eastern technologies in the West. This is a list of the ten greatest inventions of the Middle Ages (excluding military inventions). 1. The Heavy Plough 5th Century AD.