Crawler Center
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 Micro Crawler Alum Main Center Gear Case SI MCC3808 $17.33 Time Remaining: 22d 10h 51m Buy It Now for only: $17.33 |
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 HPI WHEELY KING CENTER SERVO MOUNT RC CRAWLER PARTS $12.25 Time Remaining: 17d 5h 53m Buy It Now for only: $12.25 |
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 LOSI 1 10 COMP CRAWLER NEW CENTER AXLES $27.99 Time Remaining: 28d 3h 38m Buy It Now for only: $27.99 |
 Axial SCX10 Honcho Dingo Rock Crawler Center Drive Shaft Half Shaft $34.99 Time Remaining: 29d 16h 11m Buy It Now for only: $34.99 |
 Losi Mini Rock Crawler Aluminum Center Gear Set Trans $21.81 Time Remaining: 7d 16h 37m Buy It Now for only: $21.81 |
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 1 24 Micro Crawler Alum Center Skid Plate SI MCC13308 $8.34 Time Remaining: 22d 5h 52m Buy It Now for only: $8.34 |
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 Losi Mini Rock Crawler STEEL center CV Drive shafts MRC37H01 upgradeFOR LOSB1717 $28.88 Time Remaining: 11d 21h 5m Buy It Now for only: $28.88 |
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 TEAM Losi Mini Rock Crawler CNC ALUMINUM center lock spool MRC38XH $9.99 Time Remaining: 5d 13h 51m |
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 Losi LOSA3164 Aluminum Center Transmission Shaft Set 1 10 Night or Comp Crawler $14.87 Time Remaining: 20d 10h 33m Buy It Now for only: $14.87 |
 NEW Thunder Tiger Center Suspension Mount Tiger Crawler PD09 0001 NIB $1.79 Time Remaining: 11d 7h 43m Buy It Now for only: $1.79 |
 Losi Mini Rock Crawler alum center lock spool MRC38XH $14.88 Time Remaining: 1d 9h 29m Buy It Now for only: $14.88 |
 Losi Mini Rock Crawler aluminum center shafts MRC37H01 $28.88 Time Remaining: 1d 9h 29m Buy It Now for only: $28.88 |
 Team Losi Racing 1 10 Night Crawler Center Transmission Shaft Pin Set LOSB3014 $7.99 Time Remaining: 14d 35m Buy It Now for only: $7.99 |
 LOSI 1 18 Crawler Center Transmission Case Set LOSB1425 $5.89 Time Remaining: 17d 17h 55m Buy It Now for only: $5.89 |
 FAST SHIP Losi Mini Rock Crawler aluminum center shafts MRC37H01 $28.88 Time Remaining: 11d 21h 4m Buy It Now for only: $28.88 |
 Losi LOSB1718 Center Skid Plate Mini Rock Crawler Pro $5.87 Time Remaining: 26d 6h 12m Buy It Now for only: $5.87 |
 LOSI LOSB1633 ALUM CENTER SKIDPLATE MICRO ROCK CRAWLER $8.87 Time Remaining: 24d 16h 45m Buy It Now for only: $8.87 |
 HPI CRAWLER KING JEEP 85621 UNIVERSAL CENTER DRIVE SET 66mm ASSEMBLED 2pcs NEW $23.85 Time Remaining: 10d 6h 9m Buy It Now for only: $23.85 |
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 Team Losi Mini Rock Crawler Center Transmission Gear $5.99 Time Remaining: 8d 5h 11m Buy It Now for only: $5.99 |
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 Team Losi Mini Rock Crawler Center Transmission Case $5.99 Time Remaining: 11d 6h 3m Buy It Now for only: $5.99 |
 Losi Mini Rock Crawler Center Diff Locker LOSB1434 $6.99 Time Remaining: 19d 2h 55m Buy It Now for only: $6.99 |
 Thunder Tiger Suspension Mount Center Tiger Crawler TTRPD090001 $1.79 Time Remaining: 13d 6h 58m Buy It Now for only: $1.79 |
 Losi Mini Rock Crawler Center Trans Gear Cover LOSB1427 $5.99 Time Remaining: 2d 3h 51m Buy It Now for only: $5.99 |
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 Losi Mini Rock Crawler Center Trans Bearing LOSB1429 $19.99 Time Remaining: 13d 3h 50m Buy It Now for only: $19.99 |
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Crawler Center
Search Engine Optimization (SEO)
© Moreniche
Search Engine Optimization (SEO)
What is SEO Optimiation?
SEO is the process of improving web pages so they rank high in search engines for a specific keyword phrase. SEO is divided in two categories: on-page optimization and off-page optimization. On-page optimization it refers to every method you use that change the page code; off-page optimization equals link popularity (more on this later)
Choosing the right keywords
The center of optimization is the keyword phrase(s) for which you want a high ranking in search engines result pages (SERP's). When you choose you keyword phrase you must take in consideration primarily your market (they must reflect what you sell) , the number of searches for it and the competition for that particularly keyword phrase.
On-page SEO
Search engines are constantly improving their algorithm so they can provide more relevant results. A relevant site is one that provides quality content for its readers so after you have chosen your keyword phrases build the content of your pages around those keywords.
On page SEO means the code page optimization so, in this phase, you should pay special attention to the following:
1. Title Tag
The title tag is one of the most important factors in achieving high rankings. A title tag is essentially an HTML code that creates the words that appear in the top bar of your Web browser. Usually, the Title Tag is the first element in the <Head> area of your site, followed by the Meta Description and the Meta Keywords Tags. These are the general rules you should follow when optimizing your title tag:
�� Use in your title maximum 3 keyword phrases and 100 characters
�� If possible , don't use stop words like "a, and, or"
�� Avoid spam: don't repeat the same keyword in your title more than twice; it's considered spam. Also, some engines penalize for using all CAPS.
2. Meta Description tag
The META description tag describes your site's content, giving search engines' spiders an accurate summary filled with multiple keywords. The META description tag should contain multiple keywords organized in a logical sentence.
�� Place the keywords phrase at the beginning of your description to achieve the best possible ranking
�� Many SE's use this to describe your site so make sure you not only repeat each of your keyword phrases (max 3) at least once but make this a true representation of the page that the visitor will be viewing, and try to keep it under 255 chars
3. The Meta Keywords Tag
The meta keywords tag allows you to provide additional text for crawler-based search engines to index along with your body copy. How does this help you? Well, for most major crawlers, it doesn't. That's because most crawlers now ignore the tag. The meta keywords tag is sometimes useful as a way to reinforce the terms you think a page is important for on the few crawlers that support it.
4. Body text
This is what your surfers will actually see when coming to your site. There are many issues to consider when placing keywords in the text of your pages. Most search engines index the full text of each page, so it's vital to place keywords throughout your text. However, each search engine uses different ranking algorithms.
These are general rules that everyone should follow:
1. Make sure your main page have your main keywords. It has a higher chance of being indexed than your other pages, and it will be the only page indexed by some engines. Some engines rank a page high if it has at least 100 words, so make that your minimum. Directories include pages based on the quality of their content, so make sure your pages aren't simply lists of keywords.
2. The H1, H2...H6 tags are given special relevancy weight, and you should plan to integrate your keywords into your heading. You don't have to go extreme, just use one H1 for your most important keyword and two H2's - one for each of your secondary keyword phrases.
3. Bolding and italicizing your keywords at least once doesn't hurt and actually gives you a very small boost (recommended, but don't go bolding every keyword on the page)
4. When creating your content pages, keep the following four concepts in mind: Keyword prominence, proximity, density and frequency.
5. Keyword prominence - the best place to place keywords in the text is at the top of each page, preferably the main page. The closer your keywords are to the start of the page or the start of a sentence, the better. This concept is known as "keyword prominence." You'll frequently see it used to describe search engines' algorithms. Some engines also say the bottom of the page should contain keywords as well. Here is an example how search engines see your page. You have a page with the following links at top:
Home Services Contact
and this heading :
OUR DATING COMPANY IS OFERING THE BEST RATED DATING SERVICES
Now, you think you did a best job with the keyword "dating "at the top of your page. A search engine, however, sees your page this way:
Home Services Contact OUR DATING COMPANY IS OFERING THE BEST RATED DATING SERVICES Now your keyword placement doesn't look as good as it did before. Try to place keyword-rich text at the very top of your page. If you are using images at the top of your page, make sure to include ALT tags, which are basically images' descriptions. Always add ALT tags to your images to make sure search engines recognize all the content on your site. ALT tags filled with keywords can also be used to boost your keyword frequency and help you achieve better rankings.
6. Keyword Proximity - some engines, such as Google, use the concept of "keyword proximity" as part of their ranking formulas. As suggested by the name, "keyword proximity" means the how close keywords are to each other. Put your keywords as close together as possible and make sure your sentences are clear.
Here's an example:
�� We have been selling weight loss products for over 3 years.
�� We have been selling products for weight loss for over 3 years.
In this case if someone should look for "weight loss products", the first sentence will rank higher because its keywords are closer to each other.
7. Keyword Frequency - is a measure of the number of times keywords occur within a page's text. It's tied to the concept of keyword density. Search engines want to see more than one repetition of a keyword in your text to make sure it's not an isolated case. The recommended repetition is 3-7 times.
8. Keyword Density - the final point on visible text is keyword density. Simply stated, keyword density is the number of occurrences of a keyword divided by the total word count. For this, I try to keep my initial density to between 1-7%. However, this number may have to change depending on the level of competition. Don't worry if your initial density is lower than that of your competitors as you will learn later in this article that there are many ways to affect your keyword density other than placing your keywords in your visible text.
9. Anchors and Links - anchor text is that portion of a hyperlink that is viewed by a user on a webpage (The Clickable text).The keywords in anchor text enhance the relevance of the target page pertaining to the keywords used. While the relevance of the page containing the anchor text is also enhanced to some degree (because of relevant keywords appearing on that page), the real gainer is the target page URL.
Use this knowledge to build the relevance of each page of your site, through optimized anchor text containing important keywords, relevant to the theme of such pages, from other pages of your site. The inclusion of important keywords in the anchor text can make a big difference in the final ranking of your site pages.
All search engines that matter, give significant weight to the anchor text on your pages.
10. Frames , Java scripts, Flash
About frames: DON'T USE THEM; they are not spiderable from the search engines. Regarding Java scripts and Flash do not use them excessively. The reason for this is that spiders cannot read JavaScript (or Flash) and thus any link or text created by such JavaScript will not be counted in your indexing and will produce a lost opportunity.
11. Navigation
The navigation structure of your site is important because it is through your navigation that the search engine spiders are able to access all of your web site's content. For sites with a small number of pages you should have every page of your site linked to every other page of your site. This can be done by having a left/right side menu or by putting a link to every other page on the bottom of your page. For sites with many pages it is advisable to include in directories the pages that are content related. For example, if you sell 10 different types of shoes and you also sell food and clothes you're probably not going to link the sport shoes page and the leather shoes page from the food page-but rather from the shoes page itself.
Off-page SEO (Link popularity)
Link popularity is the number of relevant quality inbound links pointing to your website. Most major search engines use link popularity as part of their algorithm which helps to determine the relevance of your website. If you don't have inbound links, you won't rank well for competitive keywords.
Ways to build link popularity
Link exchange
There are some very important aspects you should consider when exchanging links. The right way to exchange links is by finding quality, relevant sites with which to exchange links. These are the links that search engines care about. Convincing webmasters to exchange links with you isn't easy, this is a time consuming process.
This is how it works: You search for sites that are in the same general topic area as yours (but not sites that compete directly). After you find a list of suitable link exchange partners, you place a link to their site on your site. Then you email the webmasters of the other sites and ask for a link exchange. Do not send generic copies of the same email to each webmaster however. Write a personalized email to the webmaster explaining what you liked about the site (be specific) and why you think a link exchange would benefit both parties.
Be sure to address the webmaster by name if at all possible. Also, be sure to give him your link exchange information. This should include the title of your site, a short description, and the URL that you want his site to link to (this doesn't have to be the home page). And be sure to include the URL of the page that already has his reciprocal link on it.
Be prepared for rejection for various reasons, this is normal so don't be discouraged you will also receive email accepting your proposal. Verify that your reciprocal link is in fact on their sites and then send a "thank you" email. Here are some keyword phrases (KW) you can type in Google for finding related sites:
"Add a link" + "your keyword" "Add a site" + "your keyword" "Add URL" + "your keyword" "Add an URL" + "your keyword" "Submit a link" + "your keyword" "Submit a site" + "your keyword(s)" "Submit URL" + "your keyword(s)" "Submit an URL" + "your keyword(s)" "Suggest a link" + "your keyword" "Suggest a site" + "your keywords" "Suggest URL" + "your keyword(s)" "Suggest an URL" + "your keyword" "your keywords" + "directory" "your keywords" + "directories" keyword reciprocal + directory keyword exchange + directory keyword add site + directory keyword resources + directory keyword links + directory
(E.g)
"Add a link" + "Seo Bangalore"
"Add a link" + "Web design Bangalore"
Building inbound links through reciprocal link exchanges is very powerful website promotional tool. If done correctly, increasing your linkage will:
�� increase your traffic significantly
�� improve your visibility in the search engines by raising your link popularity
�� provide an added resource to your website
�� save you a lot of advertising money
You can use Arelis or Optilink software to manage your link exchange campaign.
Allow other people to publish your e-zine on their web site.
Include your web site's ad and link in each issue you publish. This may also help you increase the number of people that subscribe to your e-zine.
Create a directory of web sites on a specific topic.
Give people the option of adding the directory to their web site by linking to it. Put your business ad at the top of the directory's home page
Offer a free e-book to your web site visitors.
The ebook should be related to your target audience. Allow them to give the e-book to their own web site visitors by linking directly to your web site.
Exchange content with other web sites.
You could trade articles, top ten lists, etc. Both parties could include a resource box at the end of the content.
Join or create a web ring.
A web ring is a group of web sites on a similar subject agreeing to link together. To find a web ring to join type keywords "web rings" into your search engine of choice.
Directory Submission
Directories are different from standard search engines in that a search engine will query a database of indexed websites before it produces results and a directory is a database of websites that have been arranged by subject.
Search engines put weight on the links coming from directories which is why is so important that you know how to submit you site. Remember, that your site must be optimized before submitting and not in different construction phases; otherwise it will be rejected from submission. For a correct submission select the most appropriate category related to the subject matter of the site and then submit, suggesting a title, description and any other information the directory may require. Also make sure you read their submission guidelines.
About the Author
Yusuf from India, A B.E graduate with 2 years of experience.Well knowledged in Php , seo
how do you calculate the tension in a wire that is fixed at the ends and pulled in the cen?
I am pulling a stranded ship out of the surf and onto the beach in Peru. I have a strong wire stretched from the ship to an anchoring device on shore. The wire is essentially taut. I have a crawler tractor (bull dozer) attached to the wire at the center and can pull ten thousand pounds of force at right angles to the wire. The wire is 500 ft long. What is the tension at the ends of the wire and how does it change as the angle (or distance from the original straight line position) changes?
Hello
Let a = distance of the midpoint of the wire from the original midpoint position of the stretched wire.
And T = tension in one of the wires, and F the force exerted by the tractor,
then is a/250 = (F/2)/T --->
T = 250*(F/2)/a
Now, when a = 0, i.e., when the rope is straight, then is the tension is T = 250*5000/0 = infinitely large.
And when a = 1 ft, then is the tension T = 250* 5000 pounds
when a = 2 ft, the tension is T = 250*5000/2 pounds,
and so forth
Regards
Peristaltic Crawler by the Applied Research Center at FIU
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