Friday, November 30, 2007

THE MIRACLE OF ELECTRICITY IN THE BODY

Week 4

Without electricity, what would your life be like? You would have to find a way of ascending 15 floors with no elevator and preventing food in your refrigerator from spoiling. You could not watch television, warm your dinner up in the microwave, listen to your favorite music on the stereo, quickly dry your hair, cool down your bedroom by means of air conditioning, brighten that room with the touch of a switch or to operate essential machines like your dishwasher, washing machine and clothes drier. At night, your home would be dark and unsafe, and you would live deprived of the many time-saving technologies such as electric heaters, kettles, table lamps, videos and computers which all make our life so much easier. On a larger scale, traffic, communications, transport, security systems, workplaces, water distribution, energy production, publishing and the press, all depend on electricity as well.

In the absence of electricity, traffic lights, elevators, public transport, and computers all became inoperative. People were unable to go to work, go shopping, or even communicate with one another.

The importance of electricity, whose interruption can bring life to a complete standstill, goes far beyond this. Just as a city’s functioning depends on the continuation of the established order, so there is a need for electricity in the human body, in processes analogous to energy production, communications, security, maintenance, and repair. In short, life would be impossible in the absence of our bodies’ electrical system, which is even more essential than the power grid in cities.

Few who make use of electricity reflect on the fact that, just like the appliances they depend on, their bodies could not function without electricity. The fact is, however, that the human body has been equipped with a flawless electricity network, along with the presence of intelligent systems that contain the most complex information and know-how to benefit from electrical energy.

Indeed, scientists employ terms commonly used in electronics to describe the body’s nervous system: “generate,” “circuit,” “current,” “resistance,” “voltage,” “insulation,” “charge,” and so forth. It is next to impossible to describe the system without using these terms. The fact that principles necessary for the functioning of technology, discovered in only the last two centuries, have existed in the human body ever since it was first created, is a clear indication of the superior knowledge of God. The details set out in this book constitute just a few examples of His infinite knowledge that we have grown able to comprehend.

Saturday, November 24, 2007

Williamson turn

At this week I learned what is the important watching over board, we just not only protecting and watching yourselves but also others. Is a flexible being a responsible person over board. I learned one of the essential turn when somebody fill overboard this is a Williamson turn it turn 180 degree turn is the quickly. If we see a person clearly.

This are the procedure of what Williamson turn is?

1. If you can see the person in the water clearly, a simple 180 degree turn is the quickest.
2. If you lose sight of the casualty, due to poor visibility, or heavy weather and sea state, the 'Williamson turn' is a good way to get on to a reciprocal course which will take you back down your track:
3. Put your helm hard over to the starboard and add 60 degrees to your course. When the Compass is reading course + 180 degrees steer a reciprocal course and the casualty should be ahead of you.
4. In heavy weather the reciprocal course may bring the sea astern, in which case a short approach head to sea may be more appropriate once the turn has been completed.
5. Do not waste time while the boat is turning to approach the person in the water - prepare for the recovery as it is too late when they are alongside.
6. Which side will you approach?
7. Have a heaving line ready
8. Wear a lifejacket and lifeline; if you don't, you may get pulled on top of the person in the water
9. The initial approach to the person in the water will vary depending on weather/sea conditions and the type of boat. Let the weather help rather than hinder - stop unwind and drift down.
10. If you are concerned about drifting onto the person in the water, bring your stern into the wind. If you're not confident with your boat handling skills, or if it looks likely that the boat could come down on top of the person in the water, throw them the heaving line and pull them alongside to a safe place for recovery.
11. Ensure the propeller is not turning when you are alongside the person in the water.

Saturday, November 17, 2007

Choosing Fire Extinguishers

Choosing Fire Extinguishers
Identify the type of materials in the area
Class A: SOLIDS such as paper, wood, plastic etc
Class B: FLAMMABLE LIQUIDS such as paraffin, petrol, oil etc
Class C: FLAMMABLE GASES such as propane, butane, methane etc
Class D: METALS such as aluminium, magnesium, titanium etc
Class E: Fires involving ELECTRICAL APPARATUS
Class F: Cooking OIL & FAT etc

In the second week of staying in NTMA, I learned that life onboard and work onboard is one of the most dangerous professions, and I learned that fire on board is one of the problem on the ship aside from this dialing with others . Choosing a kind of fire extinguisher is to save us our lives. There are different classes of fire. CLASS A solids such as woods papers and plastics, Water Fire Extinguishers: The cheapest and most widely used fire extinguisher. Used for Class A fires. Not suitable for Class B (Liquid) fires, or where electricity is involved. CLASS B such as FLAMMABLE LIQUIDS such as paraffin, petrol, oil etc. Foam Fire Extinguishers: More expensive than water, but more versatile. Used for Classes A & B fires. Foam spray extinguishers are not recommended for fires involving electricity, but are safer than water if inadvertently sprayed onto live electrical apparatus. CLASS C such as FLAMMABLE GASES such as propane, butane, methane etc. Dry Powder Fire Extinguishers: Often termed the ‘multi-purpose’ extinguisher, as it can be used on classes A, B & C fires. Best for running liquid fires (Class B). Will efficiently extinguish Class C gas fires, BUT BEWARE, IT CAN BE DANGEROUS TO EXTINGUISH A GAS FIRE WITHOUT FIRST ISOLATING THE GAS SUPPLY. Special powders are available for class D metal fires. CLASS D such as METALS such as aluminium, magnesium, titanium etc. CO2 Fire Extinguishers:
Carbon Dioxide is ideal for fires involving electrical apparatus, and will also extinguish class B liquid fires, but has NO POST FIRE SECURITY and the fire could re-ignite. CLASS E such as Fires involving ELECTRICAL APPARATUS, For Metal Fires: A specialist fire extinguisher for use on Class D fires - metal fires such as sodium, lithium, manganese and aluminum when in the form of swarf or turnings. CLASS F such as Cooking OIL & FAT etc, Wet chemical Specialist extinguisher for class F fires.
Warning: when used indoors, powder can obscure vision or damage goods and machinery. It is also very messy.









Tuesday, November 13, 2007

The physics apparatuses

The seam breaks is past and here comes the new semester, at first I find “easy” because our major subject and subject is lesser than the past subjects but the mean attraction of mind from the past is the chemistry but suddenly exchange from physics I though that memorizations of the apparatuses is finish but even now memorizations is continuing. But as part of the subject it takes me enjoyable.
I believe that memorizing of these apparatuses is just like memorizing a machine in the shipboard applications and not just memorizing but to elaborate and knows there functions as a part of duties and responsibilities’,