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Cellular phones are a wonderful solution for communication as long as one stays close to shore. They are easily and most effectively used if you are in a 5 mile range from the shoreline. The difficulties begin once you want to head out and still be able to remain in touch. At this point the only existing alternative until not long ago was the very expensive IMARSAT system.

In nowadays however, it looks like staying in touch can be less expensive by using Satellite Communication systems.  What happens is that once out of the ground-based systems’ coverage, communication automatically switches to satellite mode, using the Satellite Communication System on board?

Usually the satellite phones are similar (in operation and in size) to the familiar mobile or fixed phones. Sometimes they are slightly larger. The significant difference is that they can be used almost anywhere.

Who uses Satellite Communication Systems at Sea?

Satellite-based telephony services (as part of the Satellite Communication system) are targeted towards different users. Among them, cell phone users who roam beyond coverage areas, individuals who work or live in parts of the world where terrestrial systems are not available, international travelers who must stay in touch at all times etc.

The VSAT (Very Small Apparatus Terminal) is aimed to be a stable solution for ships in need of communication at sea.  Sea VSAT is the use of satellite communication through a terminal on a vessel at sea. Since such a vessel sea shifts in the water the antenna needs to be stabilized with reference to the horizon and the direction of the ship in such a way that the antenna is always pointing at the satellite it uses to transmit and receive.

Presently, VSAT is considered to be the most effective method to connect between ship and shore. It’s also the most reliable and cost effective solution. Usually coverage includes internet access, messaging and voice services, tracking and these are only a few of the many services available once using Satellite Communication Systems at sea.

Satellite Communication Systems and Internet at Sea

Among other things, Satellite Communication Systems at sea offer Internet access and IP-based communication. The equipment associated with these services is designed specifically for maritime use and is stable enough to survive during rough marine weather conditions. The Satellite Communication System should be able to imitate any performance provided by the standard terrestrial voice and data network.

Synchronous Replication is a technique used to back up and replicate data in the most precise manner. The technique calls for a back up machine to be linked to the machine holding the data and replicating it synchronously.

This means, that if you have a dynamic changing and growing database and you want to back it up using Synchronous Replication, the backup machine will start a process which “freezes” your database (so no changes are made to it until the backup is complete).

The process is accurate and ensures that the backup is the most recent one if not identical to the seconds before the process. However, there is a downside to Synchronous Replication and that is the response time and possible delays in communication. These deem the process impractical unless the backup machine and the database server are located in physical proximity.

Asynchronous Replication is a backup process used for quick and efficient data recovery. Unlike the synchronous process, this one comes with the benefit of speed and the increased risk of data loss. In the process of asynchronous Replication data from one database is copied to another database, much like in any other backup process. However, in this process the source server doesn’t wait for the data to be written on the backup server before proceeding.

That said, Asynchronous Replication is still a preferred method of database backup and recovery for many companies. Whatever data recovery process companies choose, they have to make sure it works for their needs to ensure minimal data loss and maximal data loss survival, especially in this time and age.

Neodymium Magnets are rare-earth magnets which are produced from an alloy of neodymium, iron, and boron. These magnets are considered to be the strongest type of permanent magnets in the world.

Neodymium Magnets can help improve circulation and oxygen levels in your body as well as reduce tension. Advocates of magnetic therapy argue that Neodymium Magnets can also help decrease chronic pain caused by arthritis, fibromyalgia, depression and other mental and physical symptoms.

Healing your Body with Neodymium Magnets

Certain physical diseases like Spinal Cord Injury (SCI) and Multiple Sclerosis (MS) have the tendency to complicate certain sicknesses that are submissive to Neodymium Magnets and magnetic therapy, a growing in popularity medical solution.

Until not long ago, researchers believed that life was mainly a biochemical process. The notion that those magnetic fields (including Neodymium Magnets) could have a significant impact on living systems was inconceivable. However, this has changed quickly and many researchers now hold the belief that at a certain level the human body is basically an electromagnetic being.

The extreme change has very important medical aspects due to the fact that modern medicine has been focusing on biochemical processes. If the understanding is that these processes are affected by our electromagnetic being, any sort of healing perspective that focuses entirely on them will inevitably be limited.

The History of Neodymium Magnets and Medicine

Magnets (including Neodymium Magnets) have always been considered part a doctor’s “arsenal”. Many past civilizations such as the Arabs, Chinese, Hebrews, Egyptians etc used magnets to heal different ailments. It is told that Cleopatra used to wear a magnetic talisman on her forehead in order to keep her youth.

The specific spot positioned it right near the brain’s pineal gland which is known to be magnetically sensitive. One of figures who had a great influence on magnetic healing was Paracelus who aided in carrying out medicine from the Dark Ages.

He understood role various energetic forces played in healing the human body, including magnetism. In essence Paracelus argued that that a magnetic force could energize our bodies and help with self healing. In America, the usage of magnets in different forms (including Neodymium Magnets) increased dramatically following the Civil War.

People even had the magnets ordered via catalogues. As the century turned, one could find an enormous amount of writings on the subject. However, as a medical approach, magnetic therapy became more and more obsolete, until not long ago at which time its shortcomings have become more known.

How are Rare Earth Magnets made?

Rare Earth Magnets are produced by a process called powder metallurgy with a chemical arrangement of Nd, Fe, B and other small elements. NdFeB neodymium magnets are the Rare Earth Magnet with the largest magnetic execution and compelling force in the world.

The Production of Rare Earth Magnets

Rare Earth Magnets are produced in several ways, some of which are the following:

a) Vacuum Melting – A combination of Neodymium, iron, iron-boron, dysprosium and other components such as copper, gallium, aluminum etc which are stirred and melted together. In most cases, the melting process is repeated several times in order to reach the performance required by the magnets.

b) Crushing – The bars produced in the vacuum melting process are smashed into coarse powder.

c) Jet Melting – The coarse powder is grinded further into small particles. This way of production has proven to be the most effective.

d) Pressing – Pressing the powder to make block magnets, using two possible pressing methods, transverse and axial. Using the two different methods depends on the different applications.

e) Vacuum Sintering – The now compacted magnets are heated at the temperature of 1000⁰C for many hours until they are solidified and even more compacted. In some instances further heat treatments are required in order to stabilize the magnets.

f) Machining – A process used to clean up grind from the surface left from the shrinkage and distortion occurring during sintering. Small sections are cut off from a large block which enables the manufacturer to reach the tolerance and different shapes needed and

g) Surface Treatment – Different surface treatments can be used on the end result product which provides different kinds of surface finishing, looks and corrosion resistance which are required in different environments. There are additional methods to produce Rare Earth Magnets, however, the ones mentioned above are the ones most commonly used.