Hit Hub
Hub Innovazione Trentino (HIT) is a foundation that promotes the results of research and innovation in Trentino (northern Italy) in order to support the development of the local economy. HIT ensures that Trentino and its companies can benefit from the innovation deriving from the results of scientific research and fosters new business creation opportunities.
Hit Hub
Your total fitness source since 1987. ASF is one of the largest and most respected fitness equipment distributors in the United States, growing from a basement start-up in 1987 to become the #1 Precor distributor in the US. Equipping everything from hotel & multi-housing facilities to high school & university athletic centers, Advantage has worked hard to cultivate a reputation throughout the industry for quality products, excellent service, and trusted partnerships.
Whether you are beginner or an experienced contributor to open-source, hub makesit easier to fork repositories, check the CI status of abranch, and even submit pull requests from the same environmentwhere you write & commit your code.
Hyperlink-Induced Topic Search (HITS; also known as hubs and authorities) is a link analysis algorithm that rates Web pages, developed by Jon Kleinberg. The idea behind Hubs and Authorities stemmed from a particular insight into the creation of web pages when the Internet was originally forming; that is, certain web pages, known as hubs, served as large directories that were not actually authoritative in the information that they held, but were used as compilations of a broad catalog of information that led users direct to other authoritative pages. In other words, a good hub represents a page that pointed to many other pages, while a good authority represents a page that is linked by many different hubs.[1]
Many methods have been used to rank the importance of scientific journals. One such method is Garfield's impact factor. Journals such as Science and Nature are filled with numerous citations, making these magazines have very high impact factors. Thus, when comparing two more obscure journals which have received roughly the same number of citations but one of these journals has received many citations from Science and Nature, this journal needs be ranked higher. In other words, it is better to receive citations from an important journal than from an unimportant one.[2]
This phenomenon also occurs in the Internet. Counting the number of links to a page can give us a general estimate of its prominence on the Web, but a page with very few incoming links may also be prominent, if two of these links come from the home pages of sites like Yahoo!, Google, or MSN. Because these sites are of very high importance but are also search engines, a page can be ranked much higher than its actual relevance.
In the HITS algorithm, the first step is to retrieve the most relevant pages to the search query. This set is called the root set and can be obtained by taking the top pages returned by a text-based search algorithm. A base set is generated by augmenting the root set with all the web pages that are linked from it and some of the pages that link to it. The web pages in the base set and all hyperlinks among those pages form a focused subgraph. The HITS computation is performed only on this focused subgraph. According to Kleinberg the reason for constructing a base set is to ensure that most (or many) of the strongest authorities are included.
Authority and hub values are defined in terms of one another in a mutual recursion. An authority value is computed as the sum of the scaled hub values that point to that page. A hub value is the sum of the scaled authority values of the pages it points to. Some implementations also consider the relevance of the linked pages.
To begin the ranking, we let a u t h ( p ) = 1 \displaystyle \mathrm auth (p)=1 and h u b ( p ) = 1 \displaystyle \mathrm hub (p)=1 for each page p \displaystyle p . We consider two types of updates: Authority Update Rule and Hub Update Rule. In order to calculate the hub/authority scores of each node, repeated iterations of the Authority Update Rule and the Hub Update Rule are applied. A k-step application of the Hub-Authority algorithm entails applying for k times first the Authority Update Rule and then the Hub Update Rule.
The final hub-authority scores of nodes are determined after infinite repetitions of the algorithm. As directly and iteratively applying the Hub Update Rule and Authority Update Rule leads to diverging values, it is necessary to normalize the matrix after every iteration. Thus the values obtained from this process will eventually converge.
The code below does not converge, because it is necessary to limit the number of steps that the algorithm runs for. One way to get around this, however, would be to normalize the hub and authority values after each "step" by dividing each authority value by the square root of the sum of the squares of all authority values, and dividing each hub value by the square root of the sum of the squares of all hub values. This is what the pseudocode above does.
A secondary coastal low-pressure system will then hurl freezing rain and sleet into the wintry mix Wednesday, raising the risk of an ice storm capable of bringing down trees and power lines, Field said. High temps will peak near 32 degrees and residents should prepare for messy traveling all day, Field said.
When working with a GitHub repository, you'll often need to identify yourself to GitHub using your username and password. An SSH key is an alternate way to identify yourself that doesn't require you to enter you username and password every time.
According to Louisville Metro Police, the crash occurred at about 3:30 a.m. at The Hub Louisville, a restaurant and bar in the 2200 block of Frankfort Avenue. Department spokesman Dwight Mitchell said an SUV was driving north along the road, which is lined with restaurants and local businesses, when another car turned in front of it from a side street. The two cars collided, Mitchell said, and the SUV spun off the road and hit The Hub, which remains open until 4 a.m. on weekend nights.
Eight people inside the bar were injured, Mitchell said, though the injuries are not believed to be life-threatening. Five were taken to University of Louisville Hospital, he said, while three others were taken to Suburban Hospital. The drivers were not injured, he said.
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The volcanic ash from southwest Iceland which disrupted European airspace for several days led to the closure of Reykjavik's Keflavik Airport at about the time, last week, when airspace on the continent was re-opening.
Gudnason says that the airline relocated nine or 10 aircraft in total to Glasgow, from where it operated non-stop to North America. He estimates that, despite the five-day hub shift, the airline managed to keep 75-80% of its services running.
While the disruption has cost Icelandair some $300,000-400,000 per day, in terms of lost revenues and extra expenses, Gudnason says it has incurred a relatively modest $100,000 additional daily cost by moving to Glasgow. The airline is aiming to move back to Keflavik today and restore a full normal service.
Icelandair is not intending to pursue direct compensation from the hard-hit Icelandic Government. But Gudnason says it will ask the Government to invest in a tourism campaign to "build up the image of Iceland" following the recent negative publicity.
While it is rare for an airline to relocate its hub to another country during a period of crisis, Lebanon's Middle East Airlines temporarily transferred its operation from Beirut to the Syrian capital, Damascus, in July 2006 after Israeli forces bombed its home airport.
Version control allows you to keep track of your work and helps you to easily explore the changes you have made, be it data, coding scripts, notes, etc. You are probably already doing some type of version control, if you save multiple files, such as Dissertation_script_25thFeb.R, Dissertation_script_26thFeb.R, etc. This approach will leave you with tens or hundreds of similar files, making it rather cumbersome to directly compare different versions, and is not easy to share among collaborators. With version control software such as Git, version control is much smoother and easier to implement. Using an online platform like Github to store your files means that you have an online back up of your work, which is beneficial for both you and your collaborators.
Git uses the command line to perform more advanced actions and we encourage you to look through the extra resources we have added at the end of the tutorial later, to get more comfortable with Git. But until then, here we offer a gentle introduction to syncing RStudio and Github, so you can start using version control in minutes.
If you are on a personal Windows machine, download and install Git for your operating system. Below are some recommended installation instructions, to keep things simple. However, if you know what these options do, and want to change them to suit you, go ahead:
The files you put on GitHub will be public (i.e. everyone can see them & suggest changes, but only the people with access to the repository can directly edit and add/remove files). You can also have private repositories on GitHub, which means that only you can see the files. GitHub now offers free private repositories as standard with up to three collaborators per repository. They also offer a free education package, with access to software and other perks, you can apply for one using this link. 041b061a72