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Starting with version 3, Flock was based on Chromium and so used the WebKit rendering engine. Flock was available as a free download, and supported Microsoft Windows and Mac OS X platforms (previously also Linux) Support for Flock was discontinued in April 2011 and the developers recommended users switch to Google Chrome or Mozilla Firefox instead. In the office or on the go, Flock helps you stay connected. Download Flock for your desktop and mobile devices so you never miss a thing.
Mac users must have Mac OS X 10.4 or higher. Windows and Linux users may obtain the latest Java from Sun's Java site. If the display appear cut off with Firefox, then try another browser (Safari works). There is no flock command on OS X, no. If you need a shell script that can share a lockable resource with programs that use the flock system call to manage access to that resource, you will have to create such a program - by compiling the BSD source yourself, or writing your own equivalent program (perhaps in Perl or Ruby or some other language that exposes flock as part of its high-level system interface). Film noir anti-hero: I'm running Tiger on Mac OS X version 10.4.11 and I'm finding I cannot install the current version of Piclens on either Safari or Firefox. Does anyone know of places on the net where I can find older versions of Piclens or Cooliris that would be compatible with my current OS?
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CS 420/594 — Biologically Inspired Computation
NetLogo Simulation
This page was automatically generated by NetLogo 3.1.4.Questions, problems? Contact [email protected].
The applet requires Java 1.4.1 or higher. It will not run onWindows 95 or Mac OS 8 or 9. Mac users must have OS X 10.2.6 or higher and usea browser that supports Java 1.4. (Safari works, IE does not.Mac OS X comes with Safari. Open Safari and set it as your defaultweb browser under Safari/Preferences/General.)On other operating systems, you may obtain the latest Java plugin fromSun’s Java site. General information on the models, including instructions for running them on your own computer, is available from the NetLogo Simulation Information Page. To download this page, do not use 'Save As,' but right-click (or on Macs control-click) on this link. You also need to download the NetLogo program, which you can do by right-clicking or control-clicking this link.
created withNetLogo
view/download model file:Flocking.nlogo
WHAT IS IT?
Bgsjam5 game pack mac os. This model is an attempt to mimic the flocking of birds. (Theresulting motion also resembles schools of fish.) The flocks thatappear in this model are not created or led in any way by specialleader birds. Rather, each bird is following exactly the same set ofrules, from which flocks emerge.
The birds follow three rules:'alignment', 'separation', and 'cohesion'. 'Alignment' means that abird tends to turn so that it is moving in the same direction thatnearby birds are moving. 'Separation' means that a bird will turn toavoid another bird which gets too close. 'Cohesion' means that a birdwill move towards other nearby birds (unless another bird is tooclose). When two birds are too close, the 'separation' rule overridesthe other two, which are deactivated until the minimum separation isachieved.
The three rules affect only the bird's heading. Each bird always moves forward at the same constant speed.
HOW TO USE IT
First, determine the number of birds you want in the simulation andset the POPULATION slider to that value. Press SETUP to create thebirds, and press GO to have them start flying around.
The defaultsettings for the sliders will produce reasonably good flockingbehavior. However, you can play with them to get variations:
Three TURN-ANGLE sliders control the maximum angle a bird can turn as a result of each rule.
VISION is the distance that each bird can see 360 degrees around it.
THINGS TO NOTICE
Central to the model is the observation that flocks form without a leader.
Thereare no random numbers used in this model, except to position the birdsinitially. The fluid, lifelike behavior of the birds is producedentirely by deterministic rules.
Also, notice that each flock isdynamic. A flock, once together, is not guaranteed to keep all of itsmembers. Why do you think this is?
After running the model for a while, all of the birds have approximately the same heading. Why?
Sometimesa bird breaks away from its flock. How does this happen? You may needto slow down the model or run it step by step in order to observe thisphenomenon.
THINGS TO TRY
Play with the sliders to see if you can get tighter flocks, looserflocks, fewer flocks, more flocks, more or less splitting and joiningof flocks, more or less rearranging of birds within flocks, etc.
Youcan turn off a rule entirely by setting that rule's angle slider tozero. Is one rule by itself enough to produce at least some flocking?What about two rules? What's missing from the resulting behavior whenyou leave out each rule?
Will running the model for a long timeproduce a static flock? Or will the birds never settle down to anunchanging formation? Remember, there are no random numbers used inthis model.
EXTENDING THE MODEL
Currently the birds can 'see' all around them. What happens if birdscan only see in front of them? The IN-CONE primitive can be used forthis.
Is there some way to get V-shaped flocks, like migrating geese?
What happens if you put walls around the edges of the world that the birds can't fly into?
Can you get the birds to fly around obstacles in the middle of the world?
Whatwould happen if you gave the birds different velocities? For example,you could make birds that are not near other birds fly faster to catchup to the flock. Or, you could simulate the diminished air resistancethat birds experience when flying together by making them fly fasterwhen in a group.
Are there other interesting ways you can makethe birds different from each other? There could be random variation inthe population, or you could have distinct 'species' of bird.
NETLOGO FEATURES
Notice the need for the SUBTRACT-HEADINGS primitive and specialprocedure for averaging groups of headings. Just subtracting thenumbers, or averaging the numbers, doesn't give you the results you'dexpect, because of the discontinuity where headings wrap back to 0 oncethey reach 360.
CREDITS AND REFERENCES
This model is inspired by the Boids simulation invented by CraigReynolds. The algorithm we use here is roughly similar to the originalBoids algorithm, but it is not the same. The exact details of thealgorithm tend not to matter very much -- as long as you havealignment, separation, and cohesion, you will usually get flockingbehavior resembling that produced by Reynolds' original model.Information on Boids is available at http://www.red3d.com/cwr/boids/.
To refer to this model in academic publications, please use: Wilensky, U. Monkeydunkers mac os. (1998). NetLogo Flocking model. http://ccl.northwestern.edu/netlogo/models/Flocking. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL. Fresh cuts mac os.
In other publications, please use: Copyright 1998 Uri Wilensky. All rights reserved. See http://ccl.northwestern.edu/netlogo/models/Flocking for terms of use.
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www.cs.utk.edu/~mclennan/Classes/420/NetLogo/Flocking.htmlLast updated: 2007-10-25.
At a Glance
Expert’s Rating
Pros
- Tracks RSS feeds
- Includes tools for easily creating blog entries
- Allows for one-stop management of social networks and content-sharing sites
Cons
- Currently lacks MySpace support
- Interface can get a little crowded
Our Verdict
Back in the Dark Ages of Web browsers, the ability to load images and tables was a big deal because it meant that users could have prettier pages to stare at. Since then, hanging out on the Web has become a lot more interactive—you have blogs to read and post, friends to keep tabs on via social networks, and content to track across user-driven sites like Flickr and YouTube. Enter Flock. Billed as a “social Web browser,” Flock offers features that not only let you track your favorite blogs and social networks, but also make it simple to generate your own content.
Flock (ludipe) Mac Os Update
Setup is very easy. Flock imports preferences, bookmarks, and passwords from any browser that’s installed on your system. It also comes preloaded with a tab at top containing links that allow you to easily enter log-in information for Flickr, YouTube, Twitter, and Facebook. Once set, a vertical panel on the left-hand side lets you quickly scan your friends’ Facebook updates, read their Twitter tweets, or see who’s commented on your latest Flickr photoset or YouTube video. The panel also includes an elegantly designed RSS reader that allows you to track all of your assorted feeds.
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Another highly useful feature is the clipboard. To enable it, click on the Drag and Drop Web Clipboard link that’s available in the general tools tab at the top of the window. This adds a vertical storage area on the left side of the window for stashing photos, links, or copied text. You can also bring up a window and craft an entry using any item in the clipboard—a boon for hardcore bloggers.
Flock (ludipe) Mac Os X
Flock does have a few issues. For one thing, the browser lacks MySpace support, though Flock is currently working with the site to integrate it. Another drawback is the main interface, which can get a bit cluttered between the left-hand space for keeping track of your online presence and the scrolling panes that appear across the top of the window when you’re managing your media.
Macworld’s buying advice
With the ability to update blogs, track social-networking sites, and manage RSS feeds, Flock is a highly effective tool for Web surfers who want to keep tabs on their miscellaneous online networks. If you’re constantly managing blogs and monitoring what your friends are up to online, Flock can be a great timesaver.
[Lisa Schmeiser is a writer in Alameda, California. She’s been writing about Mac-related topics since 1999 and blogging since 2003.]