Explore Posterous
Search posterous
Search all posts and users. Type a name, type a favorite song title, whatever! See what comes up.
More posterous blogs
Here are posterous posts filed under speed...
Speed, Kraft und Kraftausdauer: 500m-Ruder-Intervalle, Schrägbankdrücken, Lat-Ziehen, …
Aufwärmen:
- 2000m Rudern (C2) in 8'00" (2'00"/500m).
Geschwindigkeit:
- 500m Rudern: 1'42.7" - 1'42.7" - 1'44.6" - 1'44.2" (3'30" Pause zwischen den Belastungen).
- 2000m locker Ausrudern (C2) in 8'19" (2'05"/500m).
Kraft und Kraftausdauer:
- 45°-Schrägbankdrücken: 4× 15 Wdh. @ 40kg.
- Lat-Ziehen: 3× 25 Wdh. @ 41kg.
- Kombi aus Pull-down und Push-down am Seilzug: Leiter mit 5 Wdh. pro Satz von ca. 60kg bis ca. 100kg in 5kg-Schritten.
Anmerkungen:
- Das Rudern lief gut trotz Rückenverspannungen und lahmer Beine (zur Erinnerung: gestern stand Kreuzheben und Frontkniebeugen auf dem Programm).
Faster, stronger speed class!
Google Public DNS Speed Test
One major culprit of slow browsing speed on the Internet, other than your connection speed and latency (the time it takes for a packet to travel from your computer to a server), is the Domain Name System (DNS). Each machine on the Internet has a unique number assigned to it by an Internet Service Provider (ISP), an Internet protocol address, commonly known as IP address, such as 74.125.67.100, which is the IP address for Google. If you type http://74.125.67.100 in your browser URL bar, it will take you to the same Google search page as http://google.com. Since IP addresses are very hard to retain and share, DNS was created. When you type google.com in your browser, a request is sent to a DNS server. The DNS server looks up the domain name in a table and returns the IP address. Then the browser connects to the Google server. Think of it as a telephone. You say or select “Bob”. Then the phone looks up Bob’s number in the address book then calls 123-555-4567.
Most likely, you are using your ISP’s default DNS server, and it is most likely pathetic if you are on Comcast, Charter, or AT&T. They can be slow, time out, or go down often. If, for example, you cannot browse any websites, but iChat works, you are having a DNS problem. iChat doesn’t use domains; it uses IP address directly.
Your ISP’s DNS server most likely connects to a higher DNS server and caches the result. It is best to replace your ISP’s DNS server with one higher up the food chain. There are a few choices. Two of the most popular are Level 3 and OpenDNS. They are not created equal. Level 3 is a major communications company, they run backbones (very big pipes) and supply to bandwidth to ISP’s, such as Comcast. Their DNS servers, 4.2.2.1, 4.2.2.2, 4.2.2.3, 4.2.2.4, 4.2.2.5, 4.2.2.6 are very fast for people in United States, but can be quite slow for the rest of the world. OpenDNS provide many features, such as parental control, logging, usage graphs, keyword shortcuts, phishing protection. However, their DNS servers, 208.67.222.222, 208.67.220.220, can be fluctuating in reliability and speed.
Google has now released Google Public DNS, with servers 8.8.8.8, 8.8.4.4 for free. Sometimes, they are faster than Level 3. Other times they are not. They are certainly faster for those outside of the United States. Besides speed, they also have security improvements compared to other servers. If your ISP has a miserable DNS server, and you type your bank’s address, you may go to a phishing site that is made to look identical to your bank’s real site, where you will voluntarily give away your username and password, and potentially your money.
I have written a script called time_dns that by default takes the 100 most trafficked websites, Google, Facebook, Yahoo, YouTube, etc. aggregated by Alexa and looks up their IP address against each DNS server and calculates an average. Run the script once or multiple times when you are most active on the Internet. Then choose the first 2 fastest servers under Results. Instructions on how to change your DNS servers is beyond the goal of this article. Each router is different.
Find the perfect DNS server for your network with namebench
The Domain Name System (DNS) is a hierarchical naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participants. Most importantly, it translates domain names meaningful to humans into the numerical (binary) identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide. An often used analogy to explain the Domain Name System is that it serves as the "phone book" for the Internet by translating human-friendly computer hostnames into IP addresses. For example, www.example.com translates to 208.77.188.166.
via en.wikipedia.org
namebench's goal is to benchmark your DNS server against many others around your area to see which one is the fastest and most reliable. The program uses your browser cache to work out your most visited sites and then tests various DNS servers against them to figure out which ones on average have the fastest response times and least amount of errors.
At the end of the run it produces a simple easy to read webpage with all the test results and a single server recommendation which it found to be the fastest and most reliable.
Tutorial: Change TCP/IP settings (skip step 4 and 5)Tutorial: Change DNS Settings in Windows XP Thanks
Performance tools / Stoyan's phpied.com
While theoretically you can speed up your site by just blindly following advice from this blog and other sources, it is much better to understand what's going on on the page and what you're dealing with. That's where the tools come in. Some tools give you insight about the network activities going on between the server and the browser (packet sniffers), some help you benchmark code execution on the client (profilers), some even give recommendations specific to performance improvements. You should aim at mastering as many of the tools as possible, because there's no single one that is The Tool. And that's not a bad thing, it's normal, because performance optimization is a multi-discipline activity touching a lot of different aspects of the the development process.
via phpied.com
Farming Leaves the Barn in a Hurry!
Technology is changing the speed at which farmers work while improving the crop quality.
In 1999, John Deere acquired NavCom, a leading maker of precise GPS equipment. Why? GPS enables farmers to plant, fertilize and time harvesting with far greater precision. It is not too futuristic to think of tractor and combine drones that do their work without drivers.
Through electromagnetic radiation monitoring via satellite, Infoterra, a French company, can provide faster, cheaper and persistent soil analysis data to farmers. Such data can reveal the quantity of crop growing, levels of minerals, moisture and other quality measures. When added to recent and forecast weather data, farmers can more accurately determine how, where and when crops should be grown. This includes precise recommendations on which fertilizers to use and when.
Just as the Internet has enabled consumer products companies to shift from mass marketing to one-on-one marketing to individuals, these technologies are enabling farmers to be far more precise about how they manage their acreage. The common thread in both is shortening the time it takes to detect and correct for changing conditions and reducing the level of aggregation. Think about it…whenever you can speed up feedback and reduce batch size of work, speed, flexibility and quality improve.
