Comparing Visits from Different Years

One of the reports from Google Analytics is an overview of visitors from any two dates that are of interest. You can also compare any two sets of date ranges. In this case the graphic to the left compares 1-1-08 to 7-22-08 vs. 1-1-09 to 7-22-09. The graph points [dots] are per week, but you can show data per day or per month. Click the image for a larger view of the data.

Notice that the graph lines appear almost identical. However the data indicates there has been a -0.56% increase visitors from this year to last, or around a decrease of 7000 visitors. That's less than one day worth of visitors, so maybe the site went down a few hours more this year than last.

Not much to worry about until I scroll down the report and review the data on a per page basis. That's when the data starts to look troubling. Here is a sampling of a few of the pages that are in decline, ignoring the few pages that showed an increase in visits.

CANbus -4.24% in visitors.
USB Interface -5.21% in visitors.
interfacebus.com [home page] -15.68% in visitors.
PCIexpress Interface -37.28% in visitors.
RS422 Interface -5.16% in visitors.
SerialATA Interface -7.19% in visitors.

Now these are not buses that are in decline, so there is no reason for these pages to see any decrease. Unlike the RS232 bus that is being left off newer computers; that page also showed a -12.25% decline, but I can deal with that.

So what is the deal with a graph that shows no real decrease, but many pages that seem to be in decline. Well when you check the blog listing new engineering pages, you'll see that over a hundred new pages have been added over the same time frame. So the new pages are leveling out this year even as a number of pages are seeing a reduced number of hits.

Hmm, I happen to be looking for the VME64x pin out today, my page came up first in a Google search but I decided to select the next guys page. Sure enough there's my text, plus a link back to me ~ stay off my site. Guess it's time to start looking at some of these other pages to see what's finding its way onto other websites.

Most of these guys running hardware or engineering sites aren't engineers at all, you can kind of tell by what they copy.

The point here is always spend some time searching the Internet looking for your work. I found a guy a few years back who had copied my PCIe page [and a dozen others], but I had just written the page. It had taken several hours to generate the different pin out tables in HTML, and he grabbed them in a matter of minutes.... Better stop now or I'll start naming names. Oh had two typo's I found weeks later, to bad he missed garbing the up-dates.

Links from an External Page

One of the data points AWSTATS provides is a listing of Links from External Pages.
AWSTATS is the server side counter used by interfacebus.com.
With the start of the new month the listing is small and still workable. Scrolling down the list the column indicating page visits goes blank, while still indicating hits to the site.

That normally means that another site is directly linking to graphic files on my server [site]. The site is using my graphics from my server. The graphic wasn't copied, it's being used directly from my server ~ using up my bandwidth. Not really sure if I like that better than just taking a copy of my picture file.

So I checked a few of the sites using the largest bandwidth [most hits] and visit the other web site. Once I find the graphic file their linking to, I go back to my server change the name of the pic file and up-date my pages so that they to point to the new file name. I save bandwidth and they end up with a broken link. Some times I'll leave the old file name valid but change the pic file to a graphic of my site address :)

Both sites I check were forums, which normally don't allow people to upload graphics. Web sites normally just take the graphics out-right.

The attached graphic is an example forum site that had copied one of my pic files. Some time last year I changed the file name and had a graphic of my site name up-loaded......

Alexa Demographics

Alexa is one of many web sites that collects data on web site visits, but with Alexa you have to run their tool bar. With out the tool bar they don't collect any data.

So they only gather data from a certain group of people, and not from every one who might visits a site. Because of this I've never worried about the over all stats they display because I know it's only from a small segment of the population. However at the same time, many people also think the opposite.

Any way here is a partial data chart from Alexa for interfacebus.com.

The green represent above average visits from a group, while red represents below average visits. So the web site brings in older male visitors that are highly educated while they are at work.

Click on the image for a larger view of the pic.

Top Web Site Content

Here is how the site is doing, Page Views and number of pages receiving those page views. Seems like most of the site is receiving less than 1000 page views so far this year.

Maybe it's time to work more on adding to pages already on the site and not so much into adding new pages. At any given time there are always 50 plus pages waiting on a page rank. So it's understandable to have some number of pages with no page views, but these number are to high.

70,000 to 79,000: 1 page
60,000 to 69,000: 0 pages
50,000 to 59,000: 1 page
40,000 to 49,000: 1 page
30,000 to 39,000: 2 pages
20,000 to 29,000: 4 pages
10,000 to 19,000: 18 pages
1,000 to 9,000: 340 pages
100 to 900: 809 pages
1 to 99: 640 pages [estimate]

Many pages in my list receiving below around 10 hits, are 404 pages. Or pages that were visited but don't really exist. They are just misspelled page addresses, so that 640 figure is a bit high.

Last years post on the same topic; Page views.

Twenty of the pages receiving below 10 visits were Transistor Derating Curves, a few are listed below. Another dozen or so just receiving between 10 to 20 visits. Guess that section of pages is never going to do so well.... But listing some of them here provides an external page link, and they were just up-dated.

Low visits;
2N4150 Derating. 2N5581 Derating Curve.
How to derate a 2N6762. 2N6306 Power Rating.
2N4033 Power Data. 2N6300 Power Derating Curve.
2N5002 Derating Guideline. 2N2904A Derating Graph.

Static Generation. No page text
Relay Derating Rules. Not sure what is wrong here
Cable Retracter Arms. New page
Fuse Holder Notes.
Power Supply Notes.

Zenu Link Checking

I ran Zenu on the web site today to check for bad links. To my surprise I found over a dozen bad links, and I have yet to finish checking all the links from the report.

The report from Zenu provides dozens of so call bad links, but many are just sites that just don't answer fast enough or sites that don't allow robots to check them. In either case I have to hand check all those links. The report indicated 6496 URL links that were ok, or 98% of the links. Some 27 links were reported as 'Bad', or 0.4%. However in some cases a bad link may reside on more than one page, so I've uploaded 18 pages to correct the bad links.

In addition to correcting a few bad links I also fixed a few re-directs, so the link points to the new page with out having the browser do the redirect. I did notice that many of my links that pointed to many internal Intel pages were no longer working; I ended up deleting those links.

Never really understand why a web master would cause a link to go bad. I just don't see how that helps a web site. In any case Intel just lost a few incoming links. The section of the web site with the largest number of bad links was Interface Bus Descriptions. Followed by the section covering Electronic Component Manufacturers.

Zenu also generates a sitemap so over the week end I'll be uploading a new site map to cover all the new pages that have been added to the web site over the last few months.

The correct name for Zenu is Zenu Link Sleuth and of 4/25/09 they have a new version of the program for download [version 1.3c].

The attached graphic is produced from Google Analytics and has nothing to do with Zenu. Click on the pic file for a larger image.

Googlebot Crawl Stats

Here is the latest graph on Googlebot crawl stats, or how often the Googlebot spider checks interfacebus.com. For reference, the previous Googlebot crawl rate.

The previous 90 days ending in October showed an average of 452 pages spidered each day, while this chart shows 523 pages a day.

The amount of data down-loaded has increased to over 6,405k bytes [6Meg], but the time spent downloading the information has decreased by 100mS. So the spider is reading more data faster, which is good.
July crawl rate.
Sep 07 crawl rate.
Jan to July o7 crawl rate.

External Web Linking

Here is a listing of web page addresses with only one external page link from another web site. In most cases the external link is really coming from the web site's sitemap, which is located on another server.

The list only indicates a total of 1,032 pages, while the main sitemaps page indicates 1,414 URLs.

How to Derate a Connectors.

Limiting the maximum current used by connector pins.

How to Derate Power Supplies.

How to Derate Switches.

Manufacturers of DC-to-DC Converter ICs.

A list of Voltage Converter IC vendors.

Joystick for the Apple IIc computer.

An out dated interface on the Apple Computer.

PC104 Board Dimensions.

Graphic of PC-104 card.

Manufacturers of Embedded Backplanes.

Industrial or non-commercial Back-Planes.

Listing of Single Board Computer Form Factors.

Sizes of SBC formats.

Manufacturers of Cable Clamps.

Companies that produce cable clamps.

Strain Relief Manufacturers.

Definition of Gray Code.

Hex Symbol Table.

Some of these pages should have showed up in the 'what's new blog' in addition to the sitemap, but must be missing. Having external web links help increase the page ranking of the page being linked to. But the page linking in needs to have a page rank of its own.

Link checking and SEO stuff

Hmm, I've been hand checking some pages and have found some bad links on the web site. Maybe I rely to much on Xenu to check the links on the site.

I see some old re-directs that have been fixed, just to clear the redundant listings. But what I'm more concerned about are the dozen pages found that point to the isp, indicating that the web site is gone. I assume that the Xenu robot does not detect those changes ...... That's not good. Still a few bad links out of 5,000 isn't that bad.

Search engine optimization

Search engine optimization [SEO] is the process of configuring or setting up your web site so that it is search engine friendly. It really accounts for much more than that by insuring that a web page ranks high in a search result via key word placement. "Usually, the earlier a site is presented in the search results or the higher it "ranks", the more searchers will visit that site." I practice SEO; I make sure the title or page address relates to the topic, insure the first paragraph describes the topic and so on.

Any way, I just ran the program Xenu to validate the links on the site. The robot found only four bad links, and a ton of redirects. I don't think many of these companies practice SEO. They seen to change web names, redirect to a new address for awhile and than go back to the old address.... I really don't get it. I don't even list a few companies any longer because I continue to see dead pages as they keep changing their page addresses...

I should be up-loading a new sitemap tomorrow once I get a chance to delete some of the redundant listings in the report. I also ran Gsitecrawler and generated an XML sitemap for the search engines, Google is still checking it.

On a side note, the web site seems to be going well. Download speed is being increased by deleting HTML comments, or breaking up large pages into smaller pages ~ and making the pages more focused on one particular topic. Adding a search bar to all the pages, so the site may be searched from any page. Changing the search bar so that it defaults to a website search and not the web [some pages had search bars that searched the web, while some defaulted to searching the site which could be a little confusing. I also continue to add more pages, better than 80 pages in the last four months. Google now indicates 1606 URLs submitted.

Site / Server bandwidth remains at 57kB/visits, but I think the savings from reducing the html comments is being off-set by adding the search bar to the hundred's of pages that did not have one.

Not really web site related, but I've been trading out the older google referral links in favor of their new referral code. The newest code selects one of a hundred ads, while their old code would only run google related products ~ Adwords, firefox and so on. Plus the html code is smaller in most cases as one referral link may replace three other older google referrals.

Jan 2008 was the best month ever in terms of visits, and from the site history this month should be even better. March is higher than Jan, while Feb is lower January. New content is always being added, and html coding mistakes are fixed as they are found. ~ All is well

Site Visits

I missed the day, but www.interfacebus.com passed last years unique visits of 1,168,322 for a new total of 1,200,959 unique hits so far this year, with two full months to go. The page views for this year so far are 2,870,317 different pages.

The difference is unique views are from different people, page views include the number of pages those people may have seen. Or, one person may click to another page on the site to double the page views....

So 1,200,959 people came by and looked at a total of 2,870,317 pages.....