The Hellenic Navy (HN) (Greek: Πολεμικό Ναυτικό, Polemikó Naftikó, abbreviated ΠΝ) is the naval force of Greece, part of the Greek Armed Forces. The modern Greek navy has its roots in the naval forces of various Aegean Islands, which fought in the Greek War of Independence. During the periods of monarchy (1833–1924 and 1936–1973) it was known as the Royal Navy (Βασιλικόν Ναυτικόν, Vasilikón Naftikón, abbreviated ΒΝ).The total displacement of all the navy's vessels is approximately 150,000 tons.The motto of the Hellenic Navy is "Μέγα το της Θαλάσσης Κράτος" from Thucydides' account of Pericles' oration on the eve of the Peloponnesian War. This has been roughly translated as "Great is the country that controls the sea". The Hellenic Navy's emblem consists of an anchor in front of a crossed Christian cross and trident, with the cross symbolizing Greek Orthodoxy, and the trident symbolizing Poseidon, the god of the sea in Greek mythology. Pericles' words are written across the top of the emblem. "The navy, as it represents a necessary weapon for Greece, should only be created for war and aim to victory."...............The Hellenic Merchant Marine refers to the Merchant Marine of Greece, engaged in commerce and transportation of goods and services universally. It consists of the merchant vessels owned by Greek civilians, flying either the Greek flag or a flag of convenience. Greece is a maritime nation by tradition, as shipping is arguably the oldest form of occupation of the Greeks and a key element of Greek economic activity since the ancient times. Nowadays, Greece has the largest merchant fleet in the world, which is the second largest contributor to the national economy after tourism and forms the backbone of world shipping. The Greek fleet flies a variety of flags, however some Greek shipowners gradually return to Greece following the changes to the legislative framework governing their operations and the improvement of infrastructure.Blogger Tips and Tricks
This is a bilingual blog in English and / or Greek and you can translate any post to any language by pressing on the appropriate flag....Note that there is provided below a scrolling text with the 30 recent posts...Αυτό είναι ένα δίγλωσσο blog στα Αγγλικά η/και στα Ελληνικά και μπορείτε να μεταφράσετε οποιοδήποτε ποστ σε οποιαδήποτε γλώσσα κάνοντας κλικ στη σχετική σημαία. Σημειωτέον ότι παρακάτω παρέχεται και ένα κινούμενο κείμενο με τα 30 πρόσφατα ποστς....This is a bilingual blog in English and / or Greek and you can translate any post to any language by pressing on the appropriate flag....Note that there is provided below a scrolling text with the 30 recent posts...Αυτό είναι ένα δίγλωσσο blog στα Αγγλικά η/και στα Ελληνικά και μπορείτε να μεταφράσετε οποιοδήποτε ποστ σε οποιαδήποτε γλώσσα κάνοντας κλικ στη σχετική σημαία. Σημειωτέον ότι παρακάτω παρέχεται και ένα κινούμενο κείμενο με τα 30 πρόσφατα ποστς.........

Thursday, February 13, 2014

Bike with an Electric Wheel...[ 3604 ]

Any Bike Can Be A Hybrid With This New MIT-Designed Electric Wheel

Maria Regan Maria Regan, PTC //  12/05/2013 @ 8:10πμ
Photo by Max Tomasinelli
Many people resist using a bicycle for daily transport because they’re reluctant to arrive at work or a social event sweating from the effort of getting there. Electric bicycles are an option, but they tend to be expensive, heavy and inelegant.
Enter the Copenhagen Wheel, which lets riders transform their standard bikes into electric hybrids simply by swapping out the rear wheel.
Slated to become available for purchase by the end of this month, the wheel was developed by students at MIT’s SENSEable City Lab and has won multiple design awards, including the James Dyson Award in 2010. The wheel is being brought to market by Superpedestrian, a Cambridge, Mass. start-up that recently received $2.1 million in funding from Spark Capital.
The Copenhagen Wheel’s distinctive red hub contains a motor, a removable lithium battery pack and a gear system, as well as environmental and location sensors that provide data for related mobile applications.
Riders can select a level of motor assistance, get updates on road conditions, track miles, and lock the bike via smartphone apps. Through the Superpedestrian SDK, an open-source platform, the company hopes developers will create other practical and social apps for the wheel.

..............

............
 The wheel’s motor converts the friction created during back-peddle braking to electricity, which charges the battery. When a cyclist is riding downhill, the gears switch to enable additional energy recovery. The wheel gives back the stored energy in the form of a “push” when sensors detect that the rider is pedaling harder, like when cycling uphill. Riders looking for a workout can forgo the motor assist altogether. The range for assisted rides is approximately 30 miles.
In addition to making cycling a more practical option while enabling people to keep their existing bikes, the developers hope the wheel’s data-collection capabilities will lead to the creation of urban carbon-credits programs to further encourage more riding and less driving.
The wheel’s price has yet to be announced. If you’d like to be an early adopter, you might want to get in the virtual line. Superpedestrian has already received some 14,000 pre-orders.
.
A project by the MIT Senseable City Lab. Photo by Max Tomasinelli 

This Article Originally Appeared on PTC Product Lifecycle Stories.
Αναρτήθηκε από στις
Ετικέτες

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)