Monday, October 31, 2011

Macworld ScreenFlow 3.0 Video Software Review

Telestream ScreenFlow 3.0

One of the best ways to explain a tricky task to someone—whether it's replacing spark plugs in a car or using an image editor to clean up an old photo—is to simply show them how it's done. Telestream's ScreenFlow 3.0.1 can certainly help with the latter. This amazing app helps you create computer-based tutorial videos by recording your screen activity (along with narration), which you can then share online with friends and fans.

ScreenFlow opens to a very small preference panel that lets you configure your recording. In addition to screen activity (recorded by default), you can choose to capture audio from any available mic as well as directly from the computer. ScreenFlow also allows you to capture video from your iSight camera while it records screen activity—a clever inclusion that lets you connect visually with your audience rather than exist only as a disembodied voice. Clicking the record button starts a five-second countdown, and then you're on stage.

The quality of the resulting screen recording is top-notch. I attempted to bog down the app by recording screen activity, audio from the computer, and video from my iMac's iSight, all while playing music and 720p video files within iTunes. ScreenFlow captured it all, with scarcely a skipped frame. Impressively, screen activity and user audio and video are captured as separate clips.

ScreenFlow sets itself apart from other screen capture utilities by including a capable video editor. Once you've wrapped up your recording, the video appears in an editing window that is very similar to iMovie. (ScreenFlow's user interface is cleaner and feels much more intuitive than iMovie, however.) As with most video editors, ScreenFlow supports multiple audio and video tracks, listed vertically, that flow left to right along a standard timeline. Clips can be split, trimmed, and repositioned, and like iMovie, ScreenFlow allows you to add animated transitions between clips.

At the right of the video editor, you'll find a collection of properties that let you configure different aspects of the clips you record. Video Properties let you resize clips, adjust opacity, or add a reflection, while Audio Properties allow you to adjust volumes, apply effects and remove background noise from a clip (which can effectively remove the hum of the computer often captured by the internal mic).

However, it's the screencast-specific properties that really add shine to ScreenFlow. Under Screen Recording Properties, you have the option to turn on and off the mouse cursor, increase the cursor's size, and add a click effect to help your viewers see where you're clicking the mouse. (The radar effect displays an expanding red circle that brilliantly calls attention to each click.) Meanwhile, Callout Properties let you isolate a part of the screen to further focus the viewer's attention. You can highlight the foreground window by dimming and blurring the background, for example, or enlarge the area around the cursor as you click from place to place. It's all handled expertly by the app. Other properties allow you to annotate your screencast with text, arrows, and shapes.

Once you're happy with your screencast, you can export it using a variety of presets such as iPad, Web, and Windows Media. And happily, ScreenFlow can streamline your workflow by publishing videos directly to YouTube and Vimeo.

It's also worth pointing out that you're not limited to screen recordings. ScreenFlow can be used to annotate other video files such as movie clips or gameplay videos—all you have to do is open an empty document and add the media you want.

Macworld's buying advice

Anyone who wants to create slick tutorial videos should seriously consider ScreenFlow 3.0.1—it's a rare gem of an app that simply does everything right.



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Want to save on microwave popcorn? Try brown bagging it

Consumer Reports

Want to save on microwave popcorn? Try brown bagging it

Microwave popcorn is a tasty snack, but it's not always the healthiest. A single serving might contain 15 grams of fat and 400 milligrams of sodium, and it's pretty easy to polish off several servings, especially on movie night. Low-fat versions improve the nutritional content, but there's another way to go, and it could save you money on top of the extra calories: Make your own microwave popcorn using plain kernels and a brown paper bag.

There's no shortage of recipes on the internet for brown bag popcorn, and they all more or less follow the same process. Get a bag, add a few tablespoons of popcorn kernels, fold the top of the bag over a couple times, and nuke it for 2 to 3 minutes, or until there's a few seconds between pops. Some recipes suggest mixing the kernels in a teaspoon of vegetable or olive oil before popping, but that's optional, as is the salt. You can also experiment with other flavorings, such as chili powder, Parmesan cheese, or cinnamon.

If your household goes through a lot of microwave popcorn, making your own can lead to real savings. In one online comparison, store-bought microwave popcorn worked out to $3.50 per pound while the homemade version cost just 50 cents per pound. But the real savings are in the fat and sodium intake, which are down around nil if you forgo the oil and salt.

Don't own a microwave? The prospect of brown bag popcorn might not entice you into the purchase. But if it does, or if you're ready for a new unit, be sure to read our microwave buying guide and Ratings of several dozen countertop and over-the-range models.

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This Week's Reading - 20111031

First off, Happy Halloween!

10.7: Get colored sidebar icons in Finder - OS X Hits, very cool, nice to have some color back!

DIY: Manage databases with the cross-platform tool DBeaver | TechRepublic

Five HTML editors for Web experts | TechRepublic

Get smarter with iTunes U | Macworld

How to sort and organize your iPhoto library | Macworld

10 best iPad and iPhone apps for mobile working | News | TechRadar UK

Standardizing the desktop: Strategies for success - ComputerWorld

IT's guide to managing Macs in the OS X Lion era | Macworld

CCNP TSHOOT: Cisco Troubleshooting Procedures - Petri

10 ways to secure browsing in the enterprise - Computerworld

Wireless Network Tools -- Maintenance and Troubleshooting - Petri

Tutorial: WordPress: a beginner's guide - TechRadar, for those of you who still like to run your own software for blogs

Friday, October 28, 2011

Block annoying app and event invites on Facebook

MacWorld News
Block annoying app and event invites on Facebook Tired of receiving invitations from your Facebook friends to play Mafia Wars or attend an event halfway across the world? Here's an easy way to selectively block these pesky alerts.

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Siri Tips

I'm going to start collecting usage tips for Siri as I'm finding it an increasingly useful tool.

http://www.computerworld.com/s/article/print/9221101/Elgan_Getting_serious_about_Siri?taxonomyName=Macintosh&taxonomyId=163

User: "Email Deven about Halloween and say I'm having a Halloween party, and hope you can come!" Siri: "Here's the email message to Deven. Ready to send it?" The formula is: "Email [recipient] about [subject] and say [body of message]." You can also optimize replies. When Deven is looking at this message, for example, he can say: "Reply Sounds great. I'll be there." Boom! Done! You can even optimize the finding of emails by specifying the sender and the day that message was sent. For example, Siri understands: "Find that email from my mom yesterday."

 

The phone's keyboard has a microphone button. When you press it, you're in dictation mode until you press the Done button.

By mastering this technology, you can save yourself a lot of time -- and typing. Here's what you need to know.

First, you can just say the punctuation and formatting you want, and the software will add it for you. For example, you can say:

"Hi comma John period new paragraph I just wanted to all caps THANK YOU all caps off for the nice gift period new paragraph Best regards comma Mike."

Second, unlike with Siri, you can take your time with dictation. It will wait. And you can stop and start, pause and reflect and write emails and notes as long as you like.

###

Apple - iPhone 4S - TV Ad - Siri, Snow Today - YouTube

###

 

Wednesday, October 26, 2011

Article: The 10 most important things to teach your Word users

The 10 most important things to teach your Word users
http://www.techrepublic.com/blog/10things/the-10-most-important-things-to-teach-your-word-users/2794


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10 Things

The 10 most important things to teach your Word users

October 26, 2011, 11:37 AM PDT

Takeaway: Sharing these tips and precautions with your Word users will help them become more confident and proficient — which is a win for everyone (including you).

Most people can use Word right out of the box, which has its pros and cons. The pros are obvious, but Word has some complex features and tools that can quickly land a user in hot water. The following tips will help your users avoid troublesome issues and adapt to the environment quickly.

1: Don't be afraid to call support

Encourage users to learn new features on their own — experiment and learn! But also encourage them not to waste time trying to work through a problem or new feature on their own if they're really lost. Many Word users are reluctant to call support (I'm not sure why); encourage them to call support before they've wasted half their workday.

2: Use styles

Users who don't understand styles hate them and refuse to use them. That complicates their work and consequently, your work. Styles should definitely be on your training list — not just an introduction to styles, but a heavy-duty, serious training session. Supply a tutorial for applying styles. Then, using examples from their workday, show them how styles will make them more efficient and solve recurring formatting problems. You can't rely on users to wade through styles on their own. They just won't.

3: Don't alter the template

Chances are, you've distributed a few templates to your users. There may be several floating around your organization. As needs change, templates need revising — and users might think they're up to the task. They might be; they might not. Ask users to call you when they need changes, and keep your fingers crossed. You have copies for those users who strike out on their own, right?

4: Rely on [Ctrl]+Z

Probably the most important thing you can teach users is how to undo actions using [Ctrl]+Z. It's Word's only real panacea. You might be surprised to learn how many of your users are unaware of it. Knowing they can quickly undo a change encourages them to experiment and apply new features.

5: Keep it simple

Some organizations have conventions to guide users on formats, styles, and so on. If your organization doesn't, don't just turn users loose! Advise them to keep formatting and special options to a minimum. The document needs to do its job and no more. Just because there are no formal limitations isn't an excuse for needless formatting.

6: Use line and page breaks sparingly

Nothing can foul a document faster than hard line and page breaks. They're also difficult to troubleshoot. Train users to let Word handle line wrapping and page breaks. Show them how to use styles, how to add space before and after a paragraph, and how to attach a page break to a paragraph. These options are preferable to hard line and page breaks.

7: Know the difference between character and paragraph formatting

Word's formatting layers often confuse users. They need to understand the difference between character and paragraph formats. Explaining the differences will clear up a lot of their confusion and help them make better choices.

8: Take advantage of keyboard shortcuts

Word has dozens of keyboard shortcuts that some users will love and others will ignore. It's up to you to supply a list. They can decide whether they want to use it.

9: Don't expect Word to do everything

Word can't do everything. But without the right expectations, users will waste time trying to accomplish tasks that are better suited for other products. For instance, suggest Publisher for flyers, brochures, and other desktop publishing documents. In addition, LaTeX is definitely better than Word at logical markup. Let users know there are alternatives to Word by introducing them to other text-based applications.

10: Know how to turn off auto-formatting

By default, Word assumes a lot of formatting tasks. Most of the time, this arrangement helps users. Occasionally, it gets in the way. For instance, a user might want to manually number a list or begin a new line with the - character (without indenting the line). Word makes dozens of these assumptions and users need to know they can run interference by disabling specific AutoFormat and AutoCorrect options. Also, remind them that they'll need to turn these options back when they complete their special task.

More help for your Word users

Other tips?

What issues do your Word users commonly encounter — and how do you prevent or resolve the problems? Are your users pretty self-reliant or do they come to you for a lot of troubleshooting and guidance?

Get IT Tips, news, and reviews delivered directly to your inbox by subscribing to TechRepublic's free newsletters.

Susan Harkins

About Susan Harkins

Susan Sales Harkins is an IT consultant, specializing in desktop solutions. Previously, she was editor in chief for The Cobb Group, the world's largest publisher of technical journals.

Susan Harkins

Susan Harkins
Susan Sales Harkins is an IT consultant, specializing in desktop solutions. Previously, she was editor in chief for The Cobb Group, the world's largest publisher of technical journals.

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Saturday, October 22, 2011

In Depth: 10 apps for expanding your mind

TechRadar: All latest feeds
In Depth: 10 apps for expanding your mind

Best apps for expanding your mind: 1-5

At what point in life did learning become a chore? Perhaps the school classroom is to blame – because let's face it, some of our dullest days were spent there.

Remember the sun-bleached course books full of snooze-worthy text, the learn-by-rote lesson notes and the vapid drone of tiresome teachers?

If this scene sounds disturbingly familiar, you'd be forgiven for running a mile at the mention of anything remotely 'educational', but don't bolt just yet.

Armed with an iOS device and the handful of apps covered over the next few pages, learning something new is about to get not only fun, but also pretty mind-blowing.

Granted, there's no magic formula for making something interesting, but with mixed media, interaction and instant feedback at your fingertips, you'll find that topics take on a whole new dimension.

Above all, these apps will remind you that the world isn't bound by static lines of print, but is excitingly open-ended – an active universe to be explored, experienced and touched. So come with us for a virtual tour of time and space, history and evolution, spanning micro to macro.

You'll spiral down into the human genome and discover the secrets of DNA, and go on to encounter chemical elements in exciting ways you never thought possible. You'll travel through the corridors of history and western art, before skipping round the globe to take in the wildlife and culture of exotic lands. You could turn back the clock to a time before man, when dinosaurs walked the earth – and you can even get to feed them.

Or you could simply leave the planet behind, part the clouds and explore the galaxy, without ever leaving the ground.

With these apps installed, you'll find answers to questions you never thought to ask, but wish you had. So forget that dusty, drab classroom and think back to an age when curiosity wasn't the exception, but the rule. Time to reclaim that childlike wonder. Your adventure starts here.

1. Star Walk

Price: £2.99
Works with: iPhone, iPod touch, iPad

Perfect for armchair astronomers

star walk

Imagine if you could hold a window into deep space in your hands; a window granting instant knowledge of the whereabouts of every planet, every star, every system. Now add a wellspring of stellar wisdom founded on the toils of countless men down the annals of human history. Would you pay the price of a pint for that privilege?

This is Star Walk, an app sporting spectacular presentation to match its subject matter. Launch it and you open into an ambient soundscape, then up pops a summary box on the state of the solar system, detailing the current lunar phase, day length and the exact angles of the visible planets in relation to you. Tap back the date or dial it forward and the measurements alter accordingly, offering a chronology of the skies.

That's some introduction, but this app's just warming up. Tap through to the Star Spotter for a landscape-oriented overview of the sky with control buttons at the screen corners. Here Star Walk drops a database of 8,000 stars onto a photorealistic background of fainter stars and distant nebulae.

By triangulating your location it positions the star field to fit your perspective. And thanks to one of the most inspired uses of the gyroscope in the iPad 2, it then tracks the stars above you in real time, adjusting to your every move. Star names glide in and out of sight as you physically pan around. Draw down and you can even see star systems below the horizon, marked by a red line.

Stunning artistic renditions of the major constellations fade in and out of view as you pinch/unpinch the screen to activate Star Walk's adaptive zoom. All the while satellite tracking unveils space stations as they fly by.

Tap on any object and an i button appears; hit it to get in close and peruse a sidebar of astronomical data, along with an explanation (and perhaps even celestial history) of the object in question.

The Star Spotter's clock-face button works as an extension of the time machine function seen in the opening summary, enabling you to manipulate time and sky orientation to fit. A tap of the search button plugs you directly into the database for you to explore space by name or label, while the Spotter's menu button offers further fantastic tools.

Search a list of significant events in the astronomical calendar (conjunctions, meteor showers, eclipses and so on) and check out the bookmark facility, which lets you take a snapshot of the visible star field to print, save, email or share over Facebook and Twitter.

Tap the Home Location option to be shot high above the Earth and look down on your position, then swipe the globe with your finger to switch to anywhere on the planet for an alternative view of the sky.

Don't miss your deep-space picture of the day, the infrared night mode, augmented reality view (on latest-gen devices only) and the option to output to a second display.

If Vito's app isn't on your iOS device, app-savvy people will ask why. Superbly designed, masterfully executed and visually stunning, Star Walk is an armchair astronomer's dream. And even if you're not an astronomer yet, you soon will be.

2. TED

Price: Free
Works with: iPhone, iPod touch, iPad

Get inspired with a titillating TED talk

TED

There's nothing like a good speaker. No, not the type you might see in our kit section, but the kind you're most likely to see at TED.

For those still wondering, TED (Technology, Entertainment and Design) is a series of global conferences curated by British entrepreneur Chris Anderson to disseminate 'ideas worth spreading'. The topics range far and wide – anything within the broad remit of tech, science and culture is fair game – and make for hugely rewarding viewing experiences.

Unlike the $6,000 sum you'd need to cough up to attend the conference, all online TED talks are free to watch, and this similarly free app acts as a portal to all of them. Swipe through pages of tiles (arranged by most recent or most popular) to pick out a talk, or choose a theme or tag from the access list on the menu bar.

Create playlists, save top tags to return to, save videos on your device for offline viewing, or take up suggestions made by the app based on previous viewings. If you don't have time to go browsing for something to watch, hit the Inspire Me button, where you can easily choose talks to fit your mood ('courageous', 'funny', 'jawdropping' and so on) and select a maximum duration.

The iPhone app offers AirPlay playback plus TEDRadio for streaming audio talks. Packed with content and regularly updated, TED is a truly inspiring app that your Home screen shouldn't be without.

3. The Elements

Price: £9.99
Works with: iPad

Reclaim wide-eyed wonder with this stunning periodic table app

Elements

Cast your mind back to chemistry class and those oddly labelled tiles printed on paper and pinned to the lab wall. Back then the elements were drab abstractions met with a comparable level of enthusiasm to multiplication tables and hypothermic mornings in assembly hall. But no more.

Fire up this app and you're greeted with a searchable periodic table that never looked so exciting. Stunning 360-degree animated objects act as entry points to each element: tap one for a close-up and instinctively you'll want to reach out and touch it.

Accompanying this dazzling show is a breakdown of the element's atomic radius and structure, along with a vertical strip describing its melting and boiling points. Further information on each element is available at the tap of a button, piped in by way of the WolframAlpha computational knowledge engine. How deep would you like to explore each element?

Basic thermodynamic and electromagnetic properties are all present and correct, as well as more nuanced mathematical identifiers and reactivity readings. But the standout feature is just another tap away.

Switch to screen two of your chosen element for an intriguing narrative on the circumstances surrounding its discovery, notes on its volatility, as well as further objects depicting its material formations, scientific and everyday uses – from Victorian tinctures to chewing gum.

Packed with over 500 directly manipulatable 3D rotations, The Elements still delivers the most tangible portal into the constituents that make up our universe, and is a fascinating way to explore what makes up our world.

4. NASA Visualization Explorer

Price: Free
Works with: iPad

The coolest way to get stories about advanced space-based research

NASA

Many of us will have recently watched NASA's space shuttle program gracefully power down to its historic conclusion. Add to that the threat of dwindling investment and you might well think the famous agency is ready to shut up shop. Think again.

This impressive new iPad app enables you to follow NASA's broad range of ongoing research activities from week to week. Much like a visually arresting take on a news app, NASA Visualization Explorer delivers the latest news on cutting-edge projects, packaged in a variety of immersive formats.

You'll be treated to high-resolution imagery from sources both above and below the skies, as well as video from intrepid explorers of distant lands, all wrapped up with insightful commentary on the subject at hand.

Backed up by the power of NASA satellites, you'll expand your understanding of Earth's climate, the solar system and the universe at large. Peruse powerful climatic computer models – once the sole preserve of experts – or check in with polar scientists at base camp Antarctica to monitor one of the world's fastest-moving glaciers. This is a truly spectacular app.

5. Geo Walk HD

Price: £1.99
Works with: iPad

Travel the virtual globe with this nature-packed encyclopaedia app

GeoWalk hd

Encyclopaedias: not the most exciting of books. And that's a real shame. What if you could take the most interesting bits of knowledge and browse through them in a more visual, engaging way?

As luck would have it, Geo Walk HD is a fun little app that does just that. Spin the globe interface and tap a hovering object to zoom into its image card; tap again to reverse the card for a brief commentary on the subject. Use the dock to switch to the carousel card mode or turn on a category filter (architecture, for example).

With only 500 objects to discover, Geo Walk certainly won't replace your bookshelf encyclopaedia, but it will make you more likely to casually browse its entries.

Best apps for expanding your mind: 6-10

6. Art Authority

Price: £6.99
Works with: iPad

Like art? Then £7 is a steal for lifetime entry to this virtual art museum

Art authority

Brick-and-mortar museums often compete for famous artworks, making complete collections hard to come by. But this is Art Authority, and by dispensing with the legwork it can boast a collection of works by over 1,000 of the western world's major artists.

Organised by period, the main room displays a key painting from each – Ancient, Byzantine, Gothic, Renaissance, Baroque, Romantic, Impressionist, Modern and Contemporary. Tap paintings to enter rooms and view a breakdown of the major styles of the period. Check the timeline, get an overview, or search for an artist in the list.

Works can be viewed framed or fullscreen, singularly or as a slideshow, played to music, favourited, saved to your Photos, and even checked on Wikipedia – all from the helpful overlay. You can consult the Directory to search by artist, title, subject or location. And there's no closing time!

7. Dinosaur Zoo

Price: £1.49
Works with: iPad

Who needs security fences when the dinosaurs are this well behaved?

Dinosaur zoo

Kids love dinosaurs, and, given a chance, most adults will admit a fascination with these extinct vertebrates that never truly fades. But put down the superglue and clear out those old balsa models, because this is Dinosaur Zoo, and you just got a life-long pass.

Your private tour will feature sumptuously rendered animation the likes of which would have Spielberg drooling, not to mention brilliant sound effects that bring to life the habitats you will visit. You could swim with a carcharodon, feed fish to an ornithocheirus, or meet an argentinosaurus with an atrocious case of wind.

Each dino comes with a field guide of fascinating facts, including palaeontologist notes, fossil discoveries and a rundown of basic anatomy. A map indicates your dino's place of origin, but swipe between geologic periods and you'll also see the continents shift over millions of years. A starter pack of eight animals is included, with free dino packs released regularly. Worth every penny.

8. Nature Human Genome

Price: Free
Works with: iPad

Delve into the tantalising complexity of the draft genome sequence

Nature human genome

In the distant past (well, the year 2000), several leading scientists announced to great fanfare how they'd finally drafted the entire human genome sequence, heralding a breakthrough in our understanding of DNA and ushering in a new era of medicine. Since then, things have gone quiet on the genome front; have you ever wondered why?

Designed by the folks at Nature, Nature Human Genome squarely aims to answer that question. Featuring landmark research, interactive graphics, video commentary, editorial and opinion, this is a one-stop app for understanding what scientists discovered about genes, and how much remains so thoroughly unexplained.

Learn how your DNA is like a fractal pattern in complexity, and about the challenges molecular biologists face in charting the dynamic interplay of genes in protein synthesis.

9. HowStuffWorks

Price: Free
Works with: iPhone, iPod touch, iPad

Peel back the surface of everyday things to understand their workings

HowStuffWorks

Ever wondered how spam email works? Or if a car can run on nuclear power? Do fish feel pain? And can blood be used to power batteries? These are just a few of the offbeat, intriguing questions that you can find answers for using the companion app to Discovery's popular edutainment website HowStuffWorks.com.

Boasting a database of over 30,000 articles on everything from how engines operate to the world's most endangered species, HowStuffWorks is the perfect app for real-world reference or just plain curiosity.

Articles are categorised by popularity, adventure and animals, while sub-categories and a search facility offer more refined exploration. The app also acts as a streaming portal to an online archive of interesting blogs, podcasts and videos, organised under titles like Stuff You Missed in History Class, and Stuff to Blow Your Mind.

A raft of facts and quotes are also on hand at the tap of a button, altogether making this a knowledge freak's dream.

10. Science360

Price: Free
Works with: iPad

Become an intrepid explorer of science with this globe-spanning app

Science360

Keeping abreast of scientific progress is a struggle at the best of times. Science360 aims to lessen the strain by acting as a doorway into global developments. The 360 in the title refers to the interface – a panning 3D bubble of content viewed from within and navigated by swipes and pinches.

Tap tiles in the sphere and you're treated to fantastic annotated images and video focusing on a range of cuttingedge scientific topics you can share over Twitter, Facebook or email.

Despite the odd stutter, the 3D presentation is engaging, adding character to the app and a sense of depth to browsing. It also keeps you up to date with breaking news from institutions across the US.



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Thursday, October 20, 2011

Cisco IOS Diagnostic Tools

Petri IT Knowledgebase

Introduction

There are certain a number of diagnostic tools that can be used to troubleshoot and monitor the different elements of a network. This article takes a look at a number of the built-in tools/command that exists within Cisco IOS. Any experienced IOS engineer knows that many issues can be diagnosed using only the tools that exist within the IOS itself; the target audience of this article includes engineers with less experience looking to become more familiar with the available tools and those preparing for the CCNP TSHOOT exam.

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Show Processes CPU

One of the most basic commands to run on a Cisco device is show processes cpu. In its full view the command will show all of the active processes on a device and how much of the processor time the process is taking both currently and historically. Figure 1 below shows a shortened version of the command:

Cisco IOS Show Processes CPU

Figure 1 - show processes cpu

This command would typically be used when troubleshooting a problem with a device that is having trouble performing basic functions; for example if a router is having trouble forwarding and routing packets without loss.

Show Memory

Another command that is commonly in conjunction with the show processes cpu is the show memory command. This command is used to display the current status used and available memory; as with the show processes cpu command the show memory command also displays much more specific information about how memory is being allocated, however the initial information is often enough to get an idea of whether the problem happening is memory related. Figure 2 below shows a shortened version of the command:

Cisco IOS Show Memory

Figure 2 - show memory

Show IP Interfaces Brief

One of the most commonly used commands overall is the show ip interfaces brief command. As shown in Figure 3, this command is very helpful as it displays the interface, its associated IP address and its current status.

Cisco IOS show IP interfaces brief

Figure 3 - show ip interfaces brief

This is one of the commands that offers a concise output that enables the engineer the ability to map out their environment quickly. Another common version of this command can be used to display only those interfaces that have currently assigned IP addresses, this is shown in Figure 4:

Cisco IOS show ip interfaces brief | exclude unassigned IP's

Figure 4 - show ip interfaces brief | exclude unassigned

Show IP Route

The show ip route command is another often used command on Cisco IOS devices; it is used to display the contents of the current IP (IPv4) routing table. Obviously, when working on a Cisco router the contents of the routing table are a central part of the device operations, if information within the routing table is incorrect it can quickly lead an engineer in a direction to solve a problem. Figure 5 below shows the command:

Cisco IOS show IP route

Figure 5 - show ip route

Ping

Another very common tool is the ping command, obviously this is a command/tool that is not limited to Cisco IOS but can be used for a variety of different troubleshooting situations on Cisco devices. At its most simple, the ping command is used to send 5 100-byte ICMP echo packets to a specific destination; but the Cisco IOS extended ping command can do a number of different things that allow allot of troubleshooting flexibility. Some of these abilities include altering the ICMP source interface, packet size, packets sent, pattern sent, do not fragment bit, among others. Figure 6 shows an example of an extended ping:

Cisco IOS Ping

Figure 6 - ping

Traceroute

On the same track as the ping command above the traceroute command is a very basic command that can be very versatile and used in a number of different troubleshooting scenarios. At its most basic the traceroute command is used to trace the route that a packet takes from a source to destination, included with this information is an output of response times between the source and each intermediate device. One often unknown piece of information is that the traceroute command does not work exactly like the tracert command that is used on Microsoft devices; Cisco's traceroute command uses UDP to trace the route from source to destination, often this is done with other implementations using an ICMP packet. This can be an advantage in many ways because many networks automatically drop ICMP echo packets because they are commonly used in Denial of Service (DoS) attacks. Like the ping command the traceroute command can be configured with a number of different extended parameters including source interface, timeout, number of probes per device hop and UDP port number among others. Figure 7 below shows an example of the traceroute command:

Cisco IOS Traceroute

Figure 7 - traceroute

Summary

There is certainly a large number of command s that can be used for troubleshooting on a Cisco IOS device; this article has simply reviewed a couple of the most popularly used commands. Cisco IOS has a number of different commands/tools that are built in and enable an engineer the ability to troubleshoot almost anything related to the device, this is one of the most powerful abilities of IOS. For those entry level Cisco engineers, take as much time as possible to learn these tools as they will be the backbone of troubleshooting production Cisco IOS based networks.

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Sunday, October 16, 2011

Tutorial: Tilt-shift editing explained

TechRadar: All latest feeds
Tutorial: Tilt-shift editing explained

Tilt-shift editing explained

Special effects in photography tend to be a mixed bag. It can be difficult to create realistic-looking effects, much less effects that look like they were made in-camera, instead of through a digital editing process.

Tilt-shift editing is an example of a process that produces images that look radically different from their originals, yet could still conceivably have been made without a computer.

Tilt-shift has its roots in architectural and landscape photography, but in photographic communities, it has become a by-word for a style of photography that makes its subjects look like toys. Tilt-shift photography is beloved by its practitioners, partly because it offers a fresh new perspective on old and familiar scenes; it's difficult not to fall in love, for example, with an image of a favourite destination when it looks like it should be inhabited by Noddy and Big Ears.

Faking a tilt-shift image also takes mere seconds once you've got the hang of it, and can even be automated entirely, to the point that some compact cameras and even a few DSLRs come with the ability to miniaturise shots without the help of a computer.

For everyone else, creating miniature photos is a doddle, but as with producing any decent image, a little forethought and effort are required to achieve a good result. Read on to find out exactly how it's done.

Choosing your shot

Image 1

With the digital process taking a short time, choosing your shot is the most crucial aspect of creating a rewarding and convincing tilt-shift photo. The best ones work if you imagine that you're trying to create an image of a small-scale model city. That means you need to imagine the angle from which you might shoot if you were standing over such a model - not directly down, but not directly at the scene, either.

A relatively shallow angle will help with realism - think pedestrian bridges or low-rising hills. Be mindful of exactly what you choose to shoot as well. It's possible to create a convincing tilt-shift image that includes people, but it's trickier to get right than shots of vehicles, for example.

If the people in your shot are too detailed, you'll lose the air of a Hornby-style model, so try to capture people from a long way away - go for rough shapes rather than facial features. Alternatively, objects that make popular toys are a good bet: construction equipment, trains and aircraft are all good potential ideas.

Truck

These are quite specific rules, but toy-style processing won't work very well unless you follow them - standard architectural shots and everyday portraits are likely to be poor candidates. If nothing else, this is a great excuse for you to grab your camera and get shooting some new subjects.

What you'll need

As ever, if you have access to the full version of Photoshop, you're laughing - you've got all the tools you need to create repeatable, convincing miniatures, and once you've practised doing it a few times you'll be able to get the job done in a few seconds.

Those unwilling to splash out nearly £700 on Photoshop CS5 need to get a little more creative. For example, it's possible to achieve the same result using Photoshop Elements, albeit with a few restrictions. For the best effect, you'll want to use a graduated mask, which you can't do in Elements.

To get around this restriction, we'll use GIMP, which has more or less the same range of editing tools as Photoshop, and is free, although its interface is a little less intuitive than Adobe's.

There's bad news if you'd prefer to stick with album-slash-editors like Google Picasa. Despite tilt-shift's popularity as an effect, it isn't available as a one-click option in many applications.

You can knock up quick and dirty tilt-shift style images online, using a service like www.tiltshiftmaker.com, which lets you upload your images. You can then apply an automated tilt-shift effect before downloading the finished result, although high-resolution images attract a charge of around 10 pence.

How to create your tilt-shift image

How to create your tilt-shift image

before

The file you choose can be virtually any format, although the two you're most likely to see are RAW and JPG files from your camera. Working on RAW file will pay dividends in terms of how much editing you're able to do, particularly when it comes to editing the colours in your image.

If you decide to work on a JPG, the first thing you should do is save your original file as a different format, such as TIF. Not only does this protect you from making an irreversible change to the original file, but using a lossless format is best for your workflow.

Otherwise, every time you tap [Ctrl]+[S] to save, you'll lose a tiny amount of detail from your file. This won't be noticeable the first few times, but after a while you'll have a file that won't print as well as you might like at high resolutions.

Otherwise, as long as you have a picture in your mind of the final image you want to produce, creating miniatures from photos doesn't need to take long at all.

After

The effect of miniaturisation on an image is similar to the effect you can get from a tilt-shift lens. This type of lens allows the photographer to place the focal plane of a camera at an angle to the sensor. Traditionally, this means you can correct perspective distortion if you're looking up or down at something, but it also means you can be extremely precise about which parts of your image are in focus.

This lets tilt-shift users throw the top and bottom of their images out of focus, leaving just a sliver of detail in focus. This is much like the effect you get when you take a picture of a model building or city, fooling your viewers.

Completing the effect

Using miniaturisation effectively doesn't stop at creating a new depth of field effect, though. You have to think in terms of how a model is constructed and what it might be made of. Using realistic colours will ruin the illusion, so while it might be best practice to create a true-to-life image, this is one area in which you'll want strongly saturated colours to help maintain the illusion.

Create a miniature photo in GIMP

1. Pick the right shot

step 1

A bright, panoramic image like this is the perfect candidate for the miniaturisation treatment. In GIMP, the process revolves around the Quick Mask tool - a speedy way of creating a selection area that follows a particular shape or pattern.

In this case we'll create a selection area that fades in and out, then blur the rest of the image.

2. Create a Quick Mask

step 2

Go to 'Select', then 'Toggle Quick Mask', or press [Shift]+[Q]. The whole image will turn red - this is the area that will be affected by your next change.

Choose the Gradient Fill tool (L) and, under 'Shape', select 'Bi-linear'. Click and drag the mouse down across the area of the image you want to be in focus.

3. Gaussian blur

step 3

Press [Shift]+[Q] to exit Quick Mask mode - you'll see lines of marching ants denoting the selected areas. To simulate depth of field, click 'Filters', then choose 'Blur | Gaussian blur'.

A bit of experimentation will help - start with the blur radius set to around 50, and don't be afraid to tap [Ctrl]+[Z] to undo your work and try again if need be.

4. Adjust curves

step 4

Without saturated, fake-looking colours your image won't quite come together. Go to the menu and choose' Colours | Curves'. In the resulting dialog box, click on the straight diagonal line and drag it into an S-shape.

For once, subtlety takes a back seat to effectiveness - don't stop until you've got a striking effect.

5. Fine-tune levels

step 5

Choose 'Colours | Levels'. Choose the chart named 'Input levels' and drag the two pointers under the chart towards each other. The further in you drag the left-hand pointer the darker your image will be, and vice versa with the far right slider. You want punchy colours, so being heavy handed with the left-hand slider is a good thing.

6. Finish and save

step 6

Hit 'OK' in the 'Levels' box and your changes will be applied to the image. Assuming you're happy with the result, press [Shift]+[Ctrl]+[S] to output your shot as a finished file. This isn't a one-size-fits-all process: some of your image will look better with more subtle handling, or with wider or narrower blurred areas.



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