Getting Your Motorcycle Ready For the Upcoming Riding Season

It’s getting close to the time of year when we all start looking forward to the upcoming riding season that’s just around the corner. So if you live in an area where you’ve had to store your bike for the winter, it’s time to start thinking about getting it ready to go.

Even if you live in an area where you don’t have to “mothball’ your bike for several months, it’s a good idea to run through a checklist of things that will help prevent problems and keep your riding time hassle free.

Basically, at the start of every riding season you want to do is the same stuff that’s required on a 500-mile service. All the fluids should be drained with new added including your front end and brake master cylinders. When you check your brake fluid, if it looks old, thick and brown, it’s time to replace it.

By addressing all of the items included in a 500-mile service procedure, this will give you the opportunity to get reacquainted with your motorcycle and put you in a position to check all the little things you might otherwise overlook. Obviously, the more you stay on top of your maintaining motorcycle, the more you stay away from the repairs that can end up costing big bucks!

Gas Tank and Air Filter: If you haven’t ridden your bike for several months and you didn’t take the time to drain the fuel out of the gas tank and carburetor float bowl, drain out the old fuel and put some fresh gas in before you fire it up. Don’t start a motor up with fuel that’s been sitting around all winter. You may want to also consider replacing the fuel line and filter because it’s been sitting around with “stale” gasoline in it and more than likely is a problem waiting to happen. Besides, a new piece of fuel line is pretty cheap insurance.

While you are inspecting the carburetor and the other fuel system components, it’s a good time to clean up the air filter area and check the air filter element. It should be removed and cleaned up or replaced especially if some form of life decided to move in for the winter make it a home.

Fluids: No matter what, the engine oil needs to be drained and replaced along with installing a new oil filter specific to your model motorcycle. When checking the oil levels on FLT and Dyna model motorcycles, don’t forget that they need to be sitting over on the kickstand. The other models need to be sitting up straight.

Remove the   transmission  drain plug and drain out the  transmission  fluid. Make sure that you clean up the magnetic plug before you reinstall it, replace the O-ring and then pour in the proper amount of  transmission  fluid. Remember when you are checking the fluid level in the  transmission  to keep the bike sitting up straight.

One of the more important things that needs your attention is the battery. If the battery is older than 2 years, and you have not had it hooked up to some sort of battery maintainer, don’t even screw around just replace it! You can bet when you least expect it (especially in the heat of summer) that bugger will let you down.

While you are doing all of this service work, it doesn’t hurt to throw in a set of new spark plugs. Check the gap and adjust them as necessary, put a little anti-seize on the threads and DO NOT over torque them. Take a look at the plug wires and clean up the boots real good or replace them if they’re starting to look heavily worn.

Cables and Belts: Check the clutch cable for free travel and lube the pivot pin and the cable. The cables should be removed and cleaned up real good at least once a year, but if you’ve stayed on top of maintaining them, you probably don’t need to. The same things go for your throttle cables and remember to use the proper product for this application. Do NOT use WD 40!

Do a real good visual inspection on your drive belt. Make sure the alignment is correct and that you’ve got proper adjustment while keeping an eye out for any holes or fraying of the belt. This could lead to some problems down the road that will more than likely happen in the most off the wall places and I can tell you from experience, there is no easy roadside fix for a broken drive belt.

If you’re like most riders, you’ve probably never changed your fork oil. To get the best performance out a front end, the fluid should changed once a year regardless of what kind of miles you put on the bike. Also don’t think if you’re running a Springer you can simply ignore any sort of front-end maintenance. There are several items that need to be inspected and maintained on them, so check your manufacturers service manual.

After you’ve gone through all of these items, start the engine and let it warm up nice and easy with out revving it up. If you own an earlier model Evo, you may experience oil running out of the breather tube when you first start it up, but don’t get shook up because this can happen if the bike has been sitting around for a while. The oil will bleed down into the bottom end and when you start the bike up, that oil will get pushed out the breather tube.

After the bike is all warmed up, check the idle speed and do whatever adjustment is necessary. Check the kill switch to make sure it’s working OK and you should be set on all the basic stuff. Also, it doesn’t hurt to change the engine oil and filter again after you run it about 500 miles.

Addressing these basic items can really save you a lot headaches while on the road and help insure a hassle free riding season.

The Basic Principles of Preventing Infection

Basic Infection Control refers to measures designed to prevent the spread of infections or potentially infectious microorganisms to health personnel, clients and visitor. Various infection control measures are used to decrease the risk of transmission of microorganisms in hospitals.

Principles of Basic Infection Control

1. Microorganism move through space on air currents. Avoid shaking or tossing linens as these motions create currents on which these microorganisms can be transported. All isolation room doors should be closed to stop air currents.

2. Microorganisms are transferred from one surface to another whenever objects touch. When a clean item touches a less clean item, it becomes “dirty” because microorganisms are transferred to it. Keep your hands away from your hair and face. Keep linens away from your uniform. Always keep clean items separated from dirty ones, any object dropped to the floor is considered dirty.

3. Microorganisms are released into the air on droplet nuclei, whenever a person breathes or speaks. Coughing and sneezing dramatically increases the number of microorganisms released from the mouth and nose. Cover mouth when coughing and sneezing. Wash hands thoroughly.

4. Microorganisms are transferred by gravity when one item is held above another. Avoid passing dirty items over clean items or areas because it is possible for the microorganisms to drop off into a clean item or area. When storing items in a bedside stand, place a clean items on upper shelves and potentially dirty items such as bedpans on lower shelves.

5. Microorganisms move slowly on dry surfaces but very quickly through moisture. Use dry paper towel when you turn off faucets. Dry both basin before placing on bed side for storage.

6. Proper hand washing removes many of the microorganisms that would be transferred by the hands from one item to another.

Universal Precaution

1. Wear clean examination gloves for listed body fluids: Blood, semen, vaginal secretions, CSF, synovial fluid, pleural fluid, pericardial fluid, amniotic fluid, etc.

2. Wash hands:

  • a. Immediately after contact with body substances containing blood
  • b. Between patient care
  • c. Immediately after gloves are removed.

3. Wear masks and protective eyewear when appropriate.

4. Wear moisture-proof apron when appropriate.

5. Wear utility (household rubber) gloves appropriately

6. Dispose of equipment and secretions properly

7. Wear sterile gloves appropriately

8. Handle specimens of blood and listed body fluids appropriately

9. Handle soiled linens correctly:

a. Hold linen away from uniform

b. Do not shake or toss linen

c. Transport linen contaminated with blood or bloody fluids in leakage resistant proof bags.

Using Serialization

A common problem in programming is moving the program data to another spot, such as a file on disk or another computer. For example, suppose a video game needs to store a saved file on the hard drive. Normally, the developer would have to write a method that takes all the game information and puts it into a format that can be placed on disk. Another method needs to be written to reverse this. The concept of serialization, used in some programming languages, bypasses this.

If a language has serialization libraries, this means that these functions are built in. You can input an object and have built-in language libraries convert the object to data. And of course, you can do the reverse. Instead of having to write code and create your own format for storing program information, you can just have the language do it. This has a wide variety of uses besides the video game save file mentioned in the intro. Suppose you want any program to store user-inputted data. You can simply put that data into a serializable object, that write it to disk. When the program starts up again, use the deserialization methods.

This can also be used for network communications. Consider the problem of writing client and server programs that can communicate with each other. Instead of having to process data, you can just serialize the object and transmit its data over the network. As long as the client and server know what class is being used, this works.

However, not all programming languages can be serialized. Generally, this is only a feature of higher-level languages. .NET has it with the Serializable attribute for a class. For Java, the java.io.Serializable interface is used. Classes that implement this interface can be serialized. Even low-level languages such as C++ have the ability, albeit not in the standard library. The popular Boost C++ library has functions that provide the serialization ability.

However, there are also problems caused by serialization. Many languages do not have backwards compatibility. So if you write a new version of the program and try to use it with existing serialized data, it can fail. Fortunately, some languages do have backwards compatibility features that avoid this drawback.

Serialization is a useful tool that all programmers should know about. It provides an easy way to store program data permanently and transmit it between multiple computers. For languages where serialization libraries are built-in, this is generally very easy.

Genital Herpes Symptoms and Treatment

Genital herpes is one of the most common sexually transmitted diseases in the world today. It is caused by the herpes simplex virus.  This is the family of viruses that causes cold sores, shingles, and chicken pox. 

Genital herpes is caused by infection with the herpes simplex2 virus (HSV2). HSV1 is the virus that causes cold sores on the lips and nose area. The herpes virus, however, is not too particular about the mucous membrane it calls home and will happily live in either the mucous membranes of the mouth and lip area or the reproductive tract.  Because of this, oral genital contact can spread either HSV1, HSV2. Viral transmission can occur from the mouth to the genitals or from the genitals to the mouth. The blister type lesions caused by either virus are virtually identical.

Genital Herpes Symptoms

Sometimes after the initial infection there may be fever and general malaise as could be seen with any acute viral infection but this is not always apparent in all cases.  In fact the symptoms of a genital herpes infection may not be known to you until you see some blisters on or around your genital area. 

This is called an outbreak and is characteristic of the way the herpes virus acts in the body. There will be periods when the virus is dormant and none of the characteristic symptoms of genital herpes are present.  Then there will be these outbreak periods where blisters appear in the genital area and may even extend to the anal area. 

The blisters will act like any normal cold sore on the lips.  They come up with an initial tingling, then grow larger and spread and eventually burst leaving an ulceration that will slowly heal on its own.

In men these blisters occur on or around the penis.  In women the blisters may actually be in the vagina as well as on the surrounding genital area. 

Symptoms of genital herpes will come and go but the virus stays with you forever. The number of outbreaks will gradually become less and less and in some cases, some people do not see outbreaks at all.   

Diagnosis

You may not know you have contracted genital herpes until the first breakout of the blisters. Symptoms of genital herpes are so mild in some people they think they just have a skin irritation.  The best thing to do is to be checked by a doctor so that you can get diagnosed properly. 

Doctors can usually make the diagnosis based on inspection of the genital area as the lesions are quite specific in appearance.  In some instances the doctor may take a swab on the blister fluid to see if it contains the virus.

Genital Herpes Treatment

There is no cure for genital herpes, however, it can be controlled so that you can live a normal sexually active life.  Anti-viral medications are often prescribed at the first outbreak to knock back the infection and may be used for prolonged periods if outbreaks are frequent.

Other treatments for the discomfort of an outbreak are common sense measures such as wearing loose comfortable clothing, using cold compresses or soothing creams and ointments on the blisters.

A strong and healthy immune system is needed to keep the virus suppressed and to reduce the frequency of outbreaks. Health denying habits such as smoking, drug use, or toxic relationships will drain the resources of your immune system so your best method of treatment is to maintain good health.  This would include eating whole nourishing foods, getting plenty of exercise, and managing stress. 

Complications

Generally the herpes simplex virus is not considered a dangerous infection to persons who have a fully functioning immune system. The virus will be suppressed and outbreaks will not be common as long as the immune system is functioning well.

However, if the immune system becomes burdened or compromised in any way then outbreaks will be more likely to occur.  This may happen during times of physical or emotional stress.  If the immune system is comprised by other more serious illnesses such as HIV or cancer then the herpes virus can become more dangerous.

If the virus is directly transmitted to other areas such as the eyes, or the brain, complications can be very serious. This direct transmission can happen in a number of ways but the most common is during the birth process.  The infant can become infected with the virus from contact with the mother’s vagina during birth.

If you suspect you may have contracted a genital herpes infection see your doctor as soon as possible.  Never have sex during an outbreak and never have unprotected sex. This means using a condom  (either male or female type)  during every sexual encounter even during oral sex. 

Additionally you should always inform your partner of your herpes status.  This is always the right thing to do.

STD Symptoms in Men

Sexually transmitted diseases (STDs) in men are just as common in men as are in women. The difference is that some of these STDs are not as easily detectable in men. They can be cured through medication or through simple surgery and recurrences of the disease are unlikely. Because it is difficult to detect certain STDs in men it is advised that he gets checked on a yearly basis to ensure that he is in good health and that there are no diseases hiding within his system. This way he can get tested for STDs and begin treatment immediately.

Chlamydia

Chlamydia is one of the more common STDs a man can experience. It develops through contracting microbes called Chlamydia trachomatis. As per the Center for Disease Control (CDC), Chlamydia is the most common STD in the United States. Between 2004 and 2008, the rate of Chlamydia reported increased to 45 percent due to the advancements in STD testing methods and over the counter testing methods such as home STD testing kits. Chlamydia can typically be detected within one to three weeks after symptoms are presented.

Men infected with the disease will experience discharge from the penis, painful urination, and a burning or tingling feeling around the opening of the penis which can also be felt in the testicles. If Chlamydia is found in the rectal area, men will experience symptoms such as rectal discharge or draining and severe pain both during bowel movements and random times throughout the day if not all day. Additionally, Chlamydia can be transmitted to the throat through oral sex.

Gonorrhea

Gonorrhea is developed through contracting specific microorganisms called neisseria gonorrhoeae. Symptoms of gonorrhea include painful urination, white, yellow or green discharge from the penis, and swollen or enlarged testicles. Gonorrhea also affects the rectum and can be extremely painful. Symptoms a man could experience include rectal discharge, soreness, tingling sensations, rectal draining, and painful, hard, solid bowel movements. If gonorrhea has been contracted via oral sex, a man will experience a sore throat that will continue to get worse due to the many different types of bacteria already in the throat interacting with those microorganisms that cause gonorrhea. Gonorrhea can also cause epididymitis which is the curved portion at the back of the testicles where sperm matures; it is the swelling of the tube that connects the testicle to the vas deferens. Side effects can take anywhere from two to thirty days after contracting the disease. If left untreated, it can leave a man infertile and unable to have children.

Syphilis

Syphilis is one of those “silent but deadly” STDs. You could have syphilis for several weeks, months, and in rare occasions, years before experiencing side effects in any stage. The first phase of syphilis presents itself as sores around the genital area. This type of sore is called a chancre sore. It will appear as a hard, indented portion on your skin and typically disappears without treatment within three to six weeks. The second phase of syphilis rears in the form of a rash on the skin and mucous layers in the body. The rash could be extremely red and harsh or as tan spots that are most commonly found on the palms of the hands or the soles of the feet. Other symptoms you may experience include swollen lymph nodes, fever, sore throat, cerebral pain, random male pattern baldness, significant decrease in weight, and being unusually fatigued or exhausted. The rash is the biggest indicator of how severe the disease is; while it will go away on its own without treatment, once it goes away it serves as the primary indicator that the disease is now in the advanced stages. In the late stages of syphilis, a man will not show any visible side effects. However, while side effects may not be visible, the disease will essentially “eat away” and attack the major organs. In this stage, the disease begins to attack the brain, heart, liver, bones, and joints. A man can experience loss of motion, numbness, changes in vision to the point where he may eventually become blind, dementia, and the inevitable, death.

Herpes

Herpes is the most common form of STDs. It develops by contracting the herpes simplex infection 1 (Hsv-1) or herpes simplex infection 2 (Hsv-2). However, genital herpes is most commonly developed by contracting the Hsv-2 virus. The herpes virus first presents itself as one or more rankles in the genital or rectal areas of the body. These are open sores that turn into ulcers on the genitalia and rectum and can take a man five or more weeks to get rid of the virus. When the flare up is first noticed, it is the most painful, the most intense, and the most excruciating pain a man will experience. As time goes on, these episodes are less successive and less uncomfortable.

Human Immunodeficiency Virus

Human Immunodeficiency Virus, or HIV, attacks the immune system leaving a man extremely vulnerable to catching other severe illnesses. Most times when a man who has contracted the HIV virus, he may experience no symptoms of the disease. It isn’t until he becomes ill with another type of illness that HIV is detected. Flu-like symptoms such as a fever, sore throat, and swollen lymph nodes can begin to rear two to six weeks after being infected with the HIV virus. Other very common symptoms of traditional illnesses that are often seen with HIV include diarrhea, unexplained weakness, mouth sores, and a rash. These symptoms may take 10 years or more to even appear if the typical flu-like symptoms don’t appear. Having additional STDs can increase your chances of contracting the HIV virus.

Testing for STDs

Getting STD testing is more accessible than it used to be. Now, you can walk into any pharmacy and buy an STD at home testing kit which will detect certain types of STDs but not all. Testing at home has become the more common method of testing to avoid the embarrassment factor of going to their doctor. If a man suspects he has contracted a more advanced STD than what a home testing kit can detect, it is imperative he be tested as soon as possible by his doctor so the disease can be treated promptly. With home STD testing kits, a man can obtain his test results online and can take those results with him to his doctor to begin a treatment regimen for the disease. If needed, additional testing will be done to pinpoint the exact STD he has contracted.

HPV Information

One great thing about the information age is the amount of free information that exists out there. There are a lot of great things to be had out there and if you are a smart person, you can simply find it with ease. For instance, if you are looking online there is a myriad of information regarding diseases that you used to not know about. Of course I’m talking about sexually transmitted diseases, which are interesting to note and are increasing in irregularity. These modern times do not fair well for transmittable disease, because the more we travel and the more we throw caution out the window, the more we raise our chances of getting infected. If you are looking for good HPV Information, you are in luck. There is a long line of websites out there that have information about this.

Rewind time a little bit and you can really figure out that things used to be worse than they are now. You used to have to wait a long time to get any information about your disease. Not only that, before the computer age, you didn’t have early detection for a lot of things, and the death toll for cancer rose to astronomical levels. Not just in America, we’re talking worldwide, and if you wanted to learn more about diseases, including sexually transmitted diseases, you had to venture to school and take a lot of different classes. Now we are lucky and we can find information like HPV Information, with the greatest of ease. There is a lot of ease in gathering information, but it’s not as simple as you’d like to think.

There are a lot of different things that you need to know in life, and one of the must know things has to be HPV Information. Education is key to understanding what is out there and what can harm you. You wouldn’t risk your life by jumping out of a building or a plane, without at least having a parachute, and that is what education gives you in regards to sexually transmitted diseases. Education can lead to protection and if you are going to survive the onslaught of bacteria that is going to hit you while you are partying it up, you are going to need a good head on your shoulders and a smart wit.

HPV Information is readily available if you search for it online. In recent years, there has been a lot of attention in regards to this and many other diseases that you might see out there. You need to protect yourself and your partner. You need to be smart, and you need to protect yourself in any cases. If you have not been careful, then see a doctor fast, and enjoy the greater fruits of love that is available. HPV Information is not hard to find, it is easily found online and in many different areas. Even if you don’t see symptoms, you should at least know what is going on around you, which is the smart thing to do.

Underground Electric Dog Fence

An underground electric dog fence is a great way to keep your dog safe from the street or roaming into uninvited areas like your neighbor’s yard. They come in a variety of sizes to fit all dogs: underground fences for little dogs of under 12 lbs, average sized dogs and even large dogs as well as extra wire for larger acres of land. The electric fence can be buried underground, stapled above ground or attached along an existing fence. These fences give precise and consistent correction and some are specifically made for the stubborn dog with strong retriever tendencies or low sensitivity and in need of beeps and stronger vibration for them to get the message.

These underground wired fences work on slopes or in hilly areas, treed lots, in water and acres of land. Their precision and consistent correction capabilities allow for good reliability near busy streets. The variety of collars that are interchangeable make them great for small dogs, like a Chihuahua or a large dog like a Great Dane.

A small indentation or groove made in the pavement is big enough for the wire to be brought beyond the driveway to the extended yard making the dog fence very practical, just backfill the driveway with outdoor sealant. If you don’t want to buy wire get the staples and run the wire above ground. Zip ties can help you secure the wire along an existing fence.

Correction depends upon the dog receiving the   transmission . Therefore, you need to make sure that the receiver collar is the right size for your dog. It should not be smaller than the space of your two fingers between the collar and his neck (we don’t want to choke poor “Pooch”!), but the prongs need to touch the skin of your dog in order for the shock to be felt. Remember, it’s a harmless shock that is meant to catch your dog’s attention and change his current behavior. Long or medium haired dogs may need a scissor cut around the neck area so the prongs will contact the skin. If necessary, there are long pronged collars available for the long haired dog as well.

We love our dogs but, let’s face it, nothing is certain with them for dogs are naturally impulsive. Therefore, even with the underground electric dog fence training is imperative if you want a great chance of solid obedience. We highly recommend training the dog before actually using any system. Flags are available for training the dog to learn the boundary. Take 2-3 weeks, depending on your dog, to walk around the boundary with the flags so “Pooch” can see where the boundary is. Then place the collar on him and walk around with him guiding him to retreat when the signal on the collar transmits a warning. Before you know it, your dog will readily stay within the boundary of the underground electric dog fence without your presence because he won’t know that he can run through it!

Wide Area Network (WAN)

Types and Characteristics of WANs

What is a WAN?

There are two prevailing definitions of a Wide Area Network (WAN). The book definition of a WAN is a network that spans large geographical locations, usually to interconnect multiple Local Area Networks (LANs). The practical definition of a WAN is a network that traverses a public network or commercial carrier, using one of several WAN technologies

What are its Main Components?

The main components for a WAN are routers, switches and modems. These components are described below in the hardware section.

CPE – Devices on the subscriber premises are called customer premises equipment (CPE).

The subscriber owns the CPE or leases the CPE from the service provider. A copper or fiber cable connects the CPE to the service provider’s nearest exchange or central office. This cabling is often called the local loop, or “last-mile”.

DTE/DCE – Devices that put data on the local loop are called data circuit-terminating equipment, or data communications equipment (DCE). The customer devices that pass the data to the DCE are called data terminal equipment (DTE). The DCE primarily provides an interface for the DTE into the communication link on the WAN cloud.

Hardware

In a WAN you will need various types of hardware components for it to function. The typical items of hardware that you will need in a WAN are:

Router – An electronic device that connects a local area network (LAN) to a wide area network (WAN) and handles the task of routing messages between the two networks. Operates at layer 3, and makes decisions using IP addresses.

Switch – A switch is a network device that selects a path or circuit for sending a unit of data to its next destination. Operates at layer 2, and uses MAC addresses to send data to correct destination.

Modem – Short for modulator/demodulator, a modem enables a computer to communicate with other computers over telephone lines. Operates at layer 1, where signals are converted from digital to analogue and vice versa for transmission and receiving.

Wan Standards

WANs operate within the OSI model using layer 1 and layer 2 levels. The data link layer and the physical layer. The physical layer protocols describe how to provide electrical, mechanical and functional connections to the services provided by the ISP. The data link layer defines how data is encapsulated for transmission to remote sites.

Encapsulation

Encapsulation is the wrapping of data in a particular protocol header. Remember that WANs operate at the physical layer and the data link layer of the osi model and that higher layer protocols such as IP are encapsulated when sent across the WAN link. Serial interfaces support a wide range of WAN encapsulation types, which must be manually specified. These types include SDLC, PPP, Frame delay etc. Regardless of WAN encapsulation used it must be identical on both sides of the point to point link.

Packet and Circuit Switching

Circuit switching and packet switching are both used in high-capacity networks.

The majority of switched networks today get data across the network

through packet switching.

Circuit-switching is more reliable than packet-switching. Circuit switching is old and expensive, packet switching is more modern.

General Routing Issues

What is a Routing Protocol?

A routing protocol is a protocol that specifies how routers communicate and exchange information on a network. Each router has prior knowledge of its immediate neighbours and knows the structure of the network topology. The routers know this because the routing protocol shares this information.

Protocol

RIP (Routing Information Protocol) was one of the most commonly uses protocols on internal networks. Routers use RIP to dynamically adapt changes to the network connections and communicate information about which networks routers can reach and the distance between them. RIP is sometimes said to stand for Rest in Pieces in reference to the reputation that RIP has for breaking unexpectedly and rendering a network unable to function.

Routing Algorithms

Distance Vector

This type of routing protocol requires that each router simply inform its neighbours of its routing table. The distance vector protocol is also known as the bellman-ford algorithm.

Link State

This type of routing protocol requires that each router maintain a partial map of the network. The link state algorithm is also know as Dijkstra’s algorithm.

IGRP

IGRP is a type of distance vector routing protocol invented by cisco used to exchange routing data in a autonomous system. Distance vector protocols measure distances and compare routes. Routers that use distance vector must send all or a portion of their routing table in a routing update message at regular intervals to each neighbour router.

Addressing and Routing

What does routing mean?

Routing is the process of deciding how to move packets from one network to another.

The directions also known as routes can be learned by a router using a routing protocol then the information is passed from router to router along the route of the destination.

IP Address’s

Every machine connected to the internet is assigned an IP address. An example of an IP address would be 192.168.0.1. IP addresses are displayed in decimal format to make it easier for humans to understand but computers communicate in binary form. The four numbers that separate an IP address are called Octets. Each position consists of eight bits. When added to together you get 32 bit address. The purpose of each octet in an IP address is to create classes of IP addresses that can be assigned within a network. There are three main classes that we deal with Class A, B and C. The octets of an IP address are split into two parts Network and Host. In a class A address the first octet is the network portion, this determines which network the computer belongs to, the last octets of the address are the hosts that belong to the network.

Sub netting

Sub netting allows you to create multiple networks within a class A, B or C address. The subnet address is the address used by your LAN. In a Class C network address you would have a subnet mask of 255.255.255.0. A subnet mask identifies which portion is network and which is host. For example 192.168.6.15 the first octet three octets are the Network address and the last octet being the host(Workstation). It is important to subnet a network because gateways need to forward packets to other LANS. By giving each NIC on the gateway an IP address and a Subnet mask it allows the gateways to route packets from LAN to LAN. Once the packet arrives at its destination, the gateway then uses the bits of the subnet portion of the IP address to decide which LAN to send the packets.

Circuit Switched Leased Lines

A circuit switched network is one that establishes a dedicated circuit (or channel) between nodes and terminals before the users may communicate. Here are some terminologies associated with a Circuit switched network.

Frame relay is a telecommunication service designed for cost-efficient data transmission between local area networks (LANs)

Basic rate interference is a service used by small business for internet connectivity. An ISDN BRI provides two 64 Kbps digital channels to the user.

Primary rate interface (PRI) is a telecommunications standard for carrying voice and data transmissions between two locations

All data and voice channels are ISDN and operate at 64kbit/s

Packet Switching

http://www.raduniversity.com/networks/2004/PacketSwitching/main.htm – _Toc80455261

Packet switching refers to protocols in which messages are broken up into small packets before they are sent. Each packet is then transmitted over the Internet. At the destination the packets are reassembled into the original message. Packet switching main difference from Circuit Switching is that that the communication lines are not dedicated to passing messages from the source to the destination. In Packet Switching, different messages can use the same network resources within the same time period.

http://en.wikipedia.org/wiki/Asynchronous_Transfer_Mode

Asynchronous Transfer Mode (ATM) is a cell relay, packet switching network and protocolwhich encodes data into small fixed-sized cells.

ISDN is used to carry voice, data, video and images across a telephone network. ISDN stands for integrated services Digital Network. Isdn also provides users with a 128kbps bandwidth. This is done through frame relay. Frame relay complements and provides a service between ISDN, which offers bandwidth at 128 Kbps and Asynchronous Transfer Mode which operates in somewhat similar fashion to frame relay but at speeds from 155.520 Mbps or 622.080 Mbps. Frame relay is based on the older X.25 packet switching technology and is used to transmit analogue signals such as telephone conversations.

PSDN stands for packet switched data network and is a data communication network. Packet switched networks do not establish a physical communication signal like the public telephone does (circuit switched network) Packets are sent on a fixed length basis and assigned with a source and a destination address. The packets then rely on the routers to read the address and route the packets through the network.

Mobile and Broadband Services

Digital Subscriber line(DSL) is mainly used to bring high bandwidth connections to homes and small business’s over a copper wire telephone line. This is can only be achieved if you stay within the range of the telephone exchange. DSL offers download rates of up to 6mbps allowing continuous transmission of video, audio and 3D effects. DSL is set to replace ISDN and compete with the cable modem in providing multimedia to homes. DSL works by connecting your telephone line to the telephone office over copper wires that are twisted together.

Asymmetric Digital Subscribers Line is most commonly used for home users. It provides a high download speed but a lower upload speed. Using ADSL, up to 6.1 megabits per second of data can be sent downstream and up to 640 Kbps upstream.

http://en.wikipedia.org/wiki/Symmetric_Digital_Subscriber_Line

Symmetric Digital Subscriber Line is a digital subcriber line which runs over one pair of copper wires. The main difference between ADSL and SDSL is the difference in upload and download speeds. SDSL allows the same upstream data rate and downstream data rate as ADSL upstream can be very slow.

[http://searchnetworking.techtarget.com/sDefinition/0],,sid7_gci558545,00.html

HDSL High bit-rate Digital Subscriber Line, one of the earliest forms of DSL, is used for wideband digital transmission within a corporate site and between the telephone company and a customer. The main characteristic of HDSL is that provides equal bandwidth in both directions.

IDSL is a system in which data is transmitted at 128 Kbps on a regular copper telephone line from a user to a destination using digital transmission.

The Local Loop enables operators to connect directly to the consumer via copper local loops and then add their own equipment to offer broadband and other services. This process involves operators accessing local exchange buildings to connect to a network of copper lines which connect them to homes and businesses. BT is an Example of a Local Exchange. The local loop connecting the telephone exchange to most subscribers is capable of carrying frequencies well beyond the 3.4 kHz upper limit.

Benefits of using DSL

DSL can provide virtually instantaneous transmission of voice, data and video over ordinary copper phone lines. A DSL connection can eliminate delays when waiting to download information and graphics from the Internet. It provides users with a cost effective high speed Internet connection. Another benefit is that a DSL connection is always on-line (like a LAN connection) with no waiting time for dialling or connecting.

There are now more than 10 million broadband connections in the UK. By December 2005 there were 9.792 million broadband connections in the UK and the average broadband take up rate during the three months to December was more than 70,000 per week.

Ease Into the World of Investing

The United Nations does it. Governments do it. Companies do it. Fund managers do it. Millions of ordinary working people – from business owners to factory workers – do it. Housewives do it. Even farmers and children do it.

‘It’ here is investing: the science and art of creating, protecting and enhancing your wealth in the financial markets. This article introduces some of the most important concerns in the world of investment.

Let’s start with your objectives. While clearly the goal is to make more money, there are 3 specific reasons institutions, professionals and retail investors (people like you and me) invest:

  • For Security, ie for protection against inflation or market crashes
  • For Income, ie to receive regular income from their investments
  • For Growth, ie for long-term growth in the value of their investments

Investments are generally structured to focus on one or other of these objectives, and investment professionals (such as fund managers) spend a lot of time balancing these competing objectives. With a little bit of education and time, you can do almost the same thing yourself.

One of the first questions to ask yourself is how much risk you’re comfortable with. To put it more plainly: how much money are you prepared to lose? Your risk tolerance level depends on your personality, experiences, number of dependents, age, level of financial knowledge and several other factors. Investment advisors measure your risk tolerance level so they can classify you by risk profile (eg, ‘Conservative’, ‘Moderate’, ‘Aggressive’) and recommend the appropriate investment portfolio (explained below).

However, understanding your personal risk tolerance level is necessary for you too, especially with something as important as your own money. Your investments should be a source of comfort, not pain. Nobody can guarantee you’ll make a profit; even the most sensible investment decisions can turn against you; there are always ‘good years’ and ‘bad years’. You may lose part or all of your investment so always invest only what you are prepared to lose.

At some point you’ll want to withdraw some or all of your investment funds. When is that point likely to be: in 1 year, 5 years, 10 years or 25 years? Clearly, you’ll want an investment that allows you to withdraw at least part of your funds at this point. Your investment timeframe – short-term, medium-term or long-term – will often determine what kinds of investments you can go for and what kinds of returns to expect.

All investments involve a degree of risk. One of the ‘golden rules’ of investing is that reward is related to risk: the higher the reward you want, the higher the risk you have to take. Different investments can come with very different levels of risk (and associated reward); it’s important that you appreciate the risks associated with any investment you’re planning to make. There’s no such thing as a risk-free investment, and your bank deposits are no exception. Firstly, while Singapore bank deposits are rightly considered very safe, banks in other countries have failed before and continue to fail. More importantly, in 2010 the highest interest rate on Singapore dollar deposits up to $10,000 was 0.375%, while the average inflation rate from Jan-Nov 2010 was 2.66%. You were losing money just by leaving your savings in the bank.

Today, there are many, many types of investments (‘asset classes’) available. Some – such as bank deposits, stocks (shares) and unit trusts – you’re already familiar with, but there are several others you should be aware of. Some of the most common ones:

  • Bank Deposits
  • Shares
  • Investment-Linked Product1
  • Unit Trusts2
  • ETFs3
  • Gold4

1 An Investment-Linked Product (ILP) is an insurance plan that combines protection and investment. ILPs main advantage is that they offer life insurance.

2 A Unit Trust is a pool of money professionally managed according to a specific, long-term management objective (eg, a unit trust may invest in well-known companies all over the world to try to provide a balance of high returns and diversification). The main advantage of unit trusts is that you don’t have to pay brokers’ commissions.

3 An ETF or Exchange-Traded Fund comes in many different forms: for example, there are equity ETFs that hold, or track the performance of, a basket of stocks (eg Singapore, emerging economies); commodity ETFs that hold, or track the price of, a single commodity or basket of commodities (eg Silver, metals); and currency ETFs that track a major currency or basket of currencies (eg Euro). ETFs offer two main advantages: they trade like shares (on stock exchanges such as the SGX) and typically come with very low management fees.

The main difference between ETFs and Unit Trusts is that ETFs are publicly-traded assets while Unit Trusts are privately-traded assets, meaning that you can buy and sell them yourself anytime during market hours.

4 ‘Gold’ here refers to gold bullion, certificates of ownership or gold savings accounts. However, note that you can invest in gold in many other ways, including gold ETFs, gold Unit Trusts; and shares in gold mining companies.

With the advent of the Internet and online brokers, there are so many investment alternatives available today that even a beginner investor with $5,000 to invest can find several investment options suited to her objectives, risk profile and timeframe.

Diversification basically means trying to reduce risk by making a variety of investments, ie investing your money in multiple companies, industries and countries (and as your financial knowledge and wealth grows, in different ‘asset classes’ – cash, stocks, ETFs, commodities such as gold and silver, etc). This collection of investments is termed your Investment Portfolio.

Some level of diversification is important because in times of crisis, similar investments tend to behave similarly. Two of the best examples in recent history are the Singapore stock market crashes of late-2008/early-2009, during the US ‘Subprime’ crisis, and 1997, during the ‘Asian Financial Crisis’, when the price of large numbers of stocks plunged. ‘Diversifying’ by investing in different stocks wouldn’t have helped you very much on these occasions.

The concept and power of compounding are best explained by example. Assume we have 3 investments: the first returns 0.25% a year; the second returns 5% a year; and the third returns 10% a year. For each investment, we compare 2 scenarios:

  • Without compounding, ie the annual interest is taken out of the account.
  • With compounding, ie the annual interest is left (re-invested) in the account.

Let’s look at the returns over 25 years for all 3 investments, assuming we start off with $10,000 in Year 0:

  • With 0.25% return a year, your investment will grow to $10,625 after 25 years without compounding; your investment becomes $10,644 after 25 years with compounding.
  • With 5% return a year, your investment will grow to $22,500 after 25 years without compounding; your investment becomes $33,864 after 25 years with compounding.
  • With 10% return a year, your investment will grow to $35,000 after 25 years without compounding; your investment becomes $108,347 after 25 years with compounding.

This shows the dramatic effects of both higher returns and compounding: 10% annual returns coupled with 25 years of compounding will return you more than 10 times your initial investment. And 10% returns are by no means unrealistic: educated investors who actively manage their portfolio themselves and practise diversification can achieve even higher returns, even with some losing years.

People of all ages and backgrounds need practical and customised guidance in developing their financial knowledge and skills in order to reach their financial goals. In this article we’ve tried to describe in simple terms some of the most important concepts and principles you need to understand on this journey.

The Importance of Warming Up and Cooling Down

One of the most important factors in injury prevention is warming up and cooling down, and should not be neglected.

Warming up refers to a preparatory phase at the beginning of an exercise session. Warming up generally involves a period of low-impact exercise regimes which prepare the body for the more strenuous aspects of the sporting activity. Warming up is an important aspect of exercise in reducing the risk of injury that would possibly happen if over stretching occurred, without the person being physically warmed up and prepared for the exercise.

Cooling down refers to a short period at the end of an exercise session. The cooling down phase, again, tends to involve a short period of low-impact exercise which gradually returns the body to its ‘resting state’. The cooling down phase is believed to reduce the risk of muscular soreness which may occur the day after an exercise session, and reduce the risk of fainting or collapse after such a session.

The Warming Up Session

An exercise session should always commence with a period of warm up. In some cases it may take the form of a series of specially designed preparatory exercise, whilst in other sessions it will simply involve performing the activity at a low density before increasing the intensity to the desired level. The warming up period is important for the following reasons:

  • It gets the body ready for the physcal exertion that follows. This optimises the physical condition, enabling the body to cope more easily with the activity. It also enables the athlete to get the most benefit from the session.
  • If the warm-up session has specific movements relating to the sporting activity the muscles can be re-educated in preparation for the coming activities.
  • It reduces the risk of injury (cold muscles do not stretch very easily) and it reduces the risk of premature fatigue which can occur if the cardiovascular system is unprepared for strenuous activity.
  • It prepares cardiac function for increased activity and reduces the risk of stress being placed on the heart.

A typical warm-up may involve some ‘loosening exercises’ followed by a few minutes of low-impact aerobic activity and then a series of stretching exercises. This may last for approximately five to fifteen minutes depending upon the intensity of the session which follows. Loosening exercises at the start of the warm up may include activities such as ‘stretching’ and ‘running on the spot’. These are gentle activities which begin to prepare the body for exercise and are especially important if the athlete has been inactive for a while.

The aerobic exercise may involve activities such as cycling on an exercise cycle. This has the effect of increasing the heart rate, diverting blood to the exercising muscles and raising the overall temperature of the muscles.

Stretching exercises provide the final phase of warm up and ensure that the muscles and tendons are prepared for the exercise. An important reason for stretching exercises is to prevent the muscles and tendons from being overstretched during the session. Such a warm up will also prepare the joints for physical activity.

The Effects of Warm Up on the Body are:

  • Cold muscle, tendons and connectinve tissue do not stretch very easily. Stretching without a warm-up is therefore unlikely to produce the best effects. Warming up also relaxes the body and muscle which further allows them to be stretched effectively. It is also believed that cold muscles and tendons are more prone to damage since they are more likely to tear when cold.
  • A warm-up increases the heart rate gradually, and aerobic exercise prepares the heart and cardiovascular system, together with the muscles, gradually, for exercise.
  • A warm-up also causes the blood to be diverted to the exercising muscles. This is achieved by getting the blood vessels that supply the muscles being used, to dilate. This extra blood is diverted from areas of the body not as important for exercising, such as the gut.
  • Exercising, without warming up, may cause the muscles to work without an adequate oxygen supply. This forces them to use anaerobic processes to supplement their production of Adenosine Triphosphate (ATP). As a consequence, lactic acid accumulates and the muscles may become prematurely fatigued.

A warm-up increases the temperature of the body. This increase in temperature facilitates and speeds up many of the processes associated with exercise metabolism. It increases the rate of nerve impulse transmission, the rate of oxygen delivery to the muscles and the speed of the reactions associated with the production of ATP. Therefore, in this context, a warm up may be said to optimise the condition of the body.

Cooling Down

A cool-down involves a short period at the end of an exercise session during which the physical activity of the body is gradually reduced to almost its resting level. A cool-down therefore often involves a period of low-impact aerobic exercise which is gradually reduced, followed by a few gentle stretching exercises. This has a number of effects.

The gentle aerobic activity helps to get rid of any metabolic waste products which may have accumulated during the exercise session. The benefits of an active recovery are believed to be related to the muscles continuing to receive a more extensive supply of oxygenated blood, which will also assist with the removal of metabolic waste products.

During exercise the blood is being pumped around the body by the action of the heart. However, the blood is assisted in its return to the heart via the venous system and muscular contraction. If an athlete stops exercising suddenly, the heart continues to beat fast, sending blood around the body, but, because the exercise has ceased, the blood is no longer assisted in its return to the heart. It is suggested that this is one of the reasons why people sometimes feel faint after exercise. During a cool-down, the heart rate is gradually lowered to its resting level and the venous return continues to be assisted by the actively contracting muscles, thereby preventing this problem.

After exercising, and following the cool-down period, the athlete’s heart will still need a period of time to settle back down to its full resting rate but should be within 30 beats of what it was before the exercise session started. This will, of course, be influenced by the overall physical condition of the individual. It may also be influenced by the content of the session, with more demanding sessions requiring a more extensive cool-down. The cooling down period also provides an opportunity for the inclusion of additional stretching exercises, which may be desirable especially if they were not included as part of the main session. The inclusion of stretching exercises within the cool-down period not only helps to gradually lower the activity level of the body at the end of the session, but it may also prevent stiffness the following day.

The cool-down period is also likely to take place when the body is warm, making the muscles more receptive to stretching. The most effective stretching can therefore be performed at this time.