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  • SEM & Adwords: How many click without a sale before i should pause a keyword

    - by Thomas Jönsson
    I wonder how many clicks I optimally should let pass through every new keyword I try in Adwords before I find out that it's not making a profit and it should be paused! It's actually four question. 1: At which likelihood percentile should I pause a word? 2: How many clicks should I let through before I pause a word for those word which do not generate any lead? 3: How many clicks should I let through after one sale to consider the word not to be profitable? 4: Does the likelihood of the word becoming profitable affect the above? Conditions: -The clicks is normally distributed. (correct?) -A CR of 1% is break even, everything above is profit (1 sale/100 clicks=break even) Cost per Click(cpc) = 4$ -Marginal (profit per sale) = 400$ -Paybacktime = 1 year -Average click per word = 0,333 per day (121 + 2/3 per year) Exampel: After 1 click and no sale the keyword still has a high probability to be profitable. After 500 clicks and no sale it has almost no likelihood to not be profitable and should probably be paused. Thanks in advance!

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  • Stage3D: Camera pans the whole screen

    - by Thomas Versteeg
    I am trying to create a 2D Stage3D game where you can move the camera around the level in an RTS style. I thought about using Orthographic Matrix3D functions for this but when I try to scroll the whole "stage" also scrolls. This is the Camera code: public function Camera2D(width:int, height:int, zoom:Number = 1) { resize(width, height); _zoom = zoom; } public function resize(width:Number, height:Number):void { _width = width; _height = height; _projectionMatrix = makeMatrix(0, width, 0, height); _recalculate = true; } protected function makeMatrix(left:Number, right:Number, top:Number, bottom:Number, zNear:Number = 0, zFar:Number = 1):Matrix3D { return new Matrix3D(Vector.<Number>([ 2 / (right - left), 0, 0, 0, 0, 2 / (top - bottom), 0, 0, 0, 0, 1 / (zFar - zNear), 0, 0, 0, zNear / (zNear - zFar), 1 ])); } public function get viewMatrix():Matrix3D { if (_recalculate) { _recalculate = false; _viewMatrix.identity(); _viewMatrix.appendTranslation( -_width / 2 - _x, -_height / 2 - y, 0); _viewMatrix.appendScale(_zoom, _zoom, 1); _renderMatrix.identity(); _renderMatrix.append(_viewMatrix); _renderMatrix.append(_projectionMatrix); } return _renderMatrix; } And the camera is send directly to the GPU with: c3d.setProgramConstantsFromMatrix(Context3DProgramType.VERTEX, 0, cameraMatrix, true); And these are the shaders: ------Vertex Shader------ m44 op, va0, vc0 mov v0, va1.xy mov v0.z, va0.z ------Fragment Shader------ tex ft0, v0, fs0 <2d,linear,nomip> mov oc, ft1 Here is a example and here are two screenshots to show what I mean: How do I only let the inside of the stage3D scroll and not the whole stage?

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  • Camera field of view: 3D projections & trigonometry

    - by Thomas O
    Okay, here goes. I have a camera at (Xc, Yc, Zc.) The Xc and Yc coordinates are latitude/longitude, and the Zc coordinate is an altitude in metres. I have a point at (Xp, Yp, Zp) and a field of view on the camera (Th1, Th2) - where Th1 is horizontal FOV and Th2 is vertical FOV. Given this information, I'd like to: test if the point is visible (i.e. in the camera's FOV) project the point as the camera would see it I've figured out already that the camera's horizontal view at any given distance is tan(Th1) * distance, but I don't know how to test if the point is visible. Accuracy is not critical. I would prefer a simple solution over a complicated solution, if it works well enough. The computations will be performed by a small microcontroller, which isn't very fast at things like trig functions. P.S. this is not homework, I'm doing this for some game development. It will be integrated with the real world, hence the latitude/longitude/altitude. It involves flying real RC planes through virtual hoops (or chasing virtual targets), so I have to project the positions of these hoops on a display.

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  • Naming a class that decides to retrieve things from cache or a service + architecture evaluation

    - by Thomas Stock
    Hi, I'm a junior developer and I'm working on a pet project that I want to learn as much as possible from. I have the following scenario: There's a WCF service that I use to retrieve and update data, lets say Cars. So it's called CarWCFService and has a GetCars(), SaveCar(), ... . It implements interface ICarService. This isn't the Actual WCF service but more like a wrapper around it. Upon retrieving data from the service, I want to store them in local memory, as cache. I have made a class for this called CarCacheService which also implements interface ICarService. (I will explain later why it implements ICarService) I don't want client code to be calling these implementations. Instead, I want to create a third implementation for ICarService that tries to read from the CarCacheService before calling the WCFCarService, stores retrieved data in the CarCacheService, etc. 3 questions: How do I name this third class? I was thinking about something as simple as CarService. This does not really says what the service does exactly, tho. Is the naming for the other classes good? Would this naming and architecture be obvious for future programmers? This is my biggest concern. Does this architecture make sense? The reason that I implement ICarService on the CarCacheService is mainly because it allows me to fake the WCFService while debugging. I can store dummy data in a CarCacheService instance and pass it to the CarService, together with an(other) empty CarCacheService. If I made CacheCarService and WCFService public I could let client code decide if they want to drop the caching and just work directly on the WCFService.

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  • Recommendations for managing DNS issues when hosting customer sites.

    - by Thomas
    I'm working at a company which primarily provides SaaS products but also will host some of our customers corporate websites. My question relates to recommendations for managing DNS for client's domain names. My objectives: Not restrict my ability to change the server's IP address such as might happen when I move my servers to a new host. Not have to contact the customer to change their domain's DNS if I need to change the server's IP address. Often times, customers lose this information or have to track down the one person with any knowledge of the domain settings. Map both .clientdomain.com and www.clientdomain.com to the proper IIS site. However, I'm running into a couple of common problems: Sometimes, the DNS console provided by the client's hosting company does not allow for CNAME records. Sometimes, the DNS console provided by the client's hosting company will not let me create a CNAME entry for .spiffydomain.com because the given hosting company has created a SOA record for that entry or simply requires that .spiffydomain.com be an A record. I believe one solution to #2 is to use a wildcard for a CNAME entry (i.e. *.spiffydomain.com). Is that correct? How do other folks that are hosting many customer's site manage change of DNS entries on their servers?

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  • Is this method pure?

    - by Thomas Levesque
    I have the following extension method: public static IEnumerable<T> Apply<T>( [NotNull] this IEnumerable<T> source, [NotNull] Action<T> action) where T : class { source.CheckArgumentNull("source"); action.CheckArgumentNull("action"); return source.ApplyIterator(action); } private static IEnumerable<T> ApplyIterator<T>(this IEnumerable<T> source, Action<T> action) where T : class { foreach (var item in source) { action(item); yield return item; } } It just applies an action to each item of the sequence before returning it. I was wondering if I should apply the Pure attribute (from Resharper annotations) to this method, and I can see arguments for and against it. Pros: strictly speaking, it is pure; just calling it on a sequence doesn't alter the sequence (it returns a new sequence) or make any observable state change calling it without using the result is clearly a mistake, since it has no effect unless the sequence is enumerated, so I'd like Resharper to warn me if I do that. Cons: even though the Apply method itself is pure, enumerating the resulting sequence will make observable state changes (which is the point of the method). For instance, items.Apply(i => i.Count++) will change the values of the items every time it's enumerated. So applying the Pure attribute is probably misleading... What do you think? Should I apply the attribute or not?

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  • Ubuntu on Mac mini and refit

    - by Thomas
    I have successfully installed Ubuntu pangolin 64 bit on a mac mini 2011 5,3 ( server version ). I have used the Ubuntu iso which I then converted to .dmg and dd'ed into an usb stick. I didn't want to keep OS X installed so I deleted the current partition and reformatted the drive as ext4 for / + a small swap partition. Everything seems to work nicely, but I have now a question since I read lots of reviews/howto when you people installed rEfit on Mac OS X. Did you use rEfit to be able to have a dual boot or there are other advantages by doing that ( apart that you will be able to download updated firmware for your hardware in the future via Mac OS ) like BIOS emulation and the like ?

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  • Need Help Changing Owner of External HArd Drive

    - by Thomas Ballew
    My understanding of code is about zero. I can open a terminal window, and type commands that are given to me, but that's about it. If someone can help me with this question, and explain at a level I'm likely to understand, thanks. If not, thanks anyway. I have an external hard drive with two partitions. I bought this drive when my operating system was Apple, 10.5 or so, and it was formatted as HFS+ with that system. Now, connecting the HD to my Linux system, I can read files, but I have about 1.5 TB of space that I can't use, because I am not the owner of the file, so can't write to the HD. Short of reformatting the HD, is there a way for me to set the permissions for the HD so I can write to it? Again, thank you.

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  • Acceptable sound quality: stereo needed for an Android game?

    - by Thomas Calc
    I have various simple short sound effects (damage sound, dying sound, thunderbolt, fanfare, breaking) for a game that is developed for Android currently. I use OGG files: 96kbps VBR, 44.1KHz, 2 channels (that means stereo, right?). I read the other stackexchange topics about "acceptable sound quality", but they're too general, address too many things. My experience is that even with 80kbps, my effects sound OK. But I tested it on a limited number of Android devices (including a Sony Ericsson Xperia Neo and a HTC Desire HD). My questions: For mobile phones and tablets, generally, what parameters are recommended? Won't my 80kbps sounds be bad on a newer device (such as a modern tablet)? I don't hear any difference between stereo and mono (2 channels vs. 1 channel, right?), is there any noticeable difference at all for mobile phones / tablets? (in terms of the player experience) May it worth it at all? I assume that stereo sounds take much more in memory (when they're decoded to PCM), despite of the fact that the compressed OGG size is practically the same. Reacting to Roy T.'s great comment: Actually, I couldn't measure the PCM size (Android decodes OGG internally), but I thought that stereo will take more space than mono when uncompressed After throwing out one of the WAV channels in Audacity, and re-exporting it: The new WAV file size is half than before The OGG file size is practically the same as before The sound effects and game music was recorded by my friend who is an experienced hobby musician/composer, but he knows little about computers & software so he just gave me some high-quality WAV files generated via his hardware.These were stereo, but if I check them in Audacity, both channels appear to be exactly the same.Can I consider them the same (= moving to mono), or might there be some unnoticeable differences to the human eye?

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  • How did programming work when programmers used punchcards?

    - by Thomas Dignan
    I saw this: Learning to program on punchcards and I've seen this: http://en.wikipedia.org/wiki/Computer_programming_in_the_punched_card_era but they leave much to be desired. Can anyone explain to me how programmers programmed when they used punchcards? Specifically, the system of input computers used to derive instructions from the punched card itself. I do not know much about retrocomputers, so any one system of input you are familiar with would be fine. More general answers are also appreciated.

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  • Two things I learned this week...

    - by noreply(at)blogger.com (Thomas Kyte)
    I often say "I learn something new about Oracle every day".  It really is true - there is so much to know about it, it is hard to keep up sometimes.Here are the two new things I learned - the first is regarding temporary tablespaces.  In the past - when people have asked "how can I shrink my temporary tablespace" I've said "create a new one that is smaller, alter your database/users to use this new one by default, wait a bit, drop the old one".  Actually I usually said first - "don't, it'll just grow again" but some people really wanted to make it smaller.Now, there is an easier way:http://docs.oracle.com/cd/E11882_01/server.112/e26088/statements_3002.htm#SQLRF53578Using alter tablespace temp shrink space .The second thing is just a little sqlplus quirk that I probably knew at one point but totally forgot.  People run into problems with &'s in sqlplus all of the time as sqlplus tries to substitute in for an &variable.  So, if they try to select '&hello world' from dual - they'll get:ops$tkyte%ORA11GR2> select '&hello world' from dual;Enter value for hello: old   1: select '&hello world' from dualnew   1: select ' world' from dual'WORLD------ worldops$tkyte%ORA11GR2> One solution is to "set define off" to disable the substitution (or set define to some other character).  Another oft quoted solution is to use chr(38) - select chr(38)||'hello world' from dual.  I never liked that one personally.  Today - I was shown another wayhttps://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:4549764300346084350#4573022300346189787 ops$tkyte%ORA11GR2> select '&' || 'hello world' from dual;'&'||'HELLOW------------&hello worldops$tkyte%ORA11GR2>just concatenate '&' to the string, sqlplus doesn't touch that one!  I like that better than chr(38) (but a little less than set define off....)

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  • Random map generation

    - by Thomas Owers
    I'm starting/started a 2D tilemap RPG game in Java and I want to implement random map generation. I have a list of different tiles, (dirt/sand/stone/grass/gravel etc) along with water tiles and path tiles, the problem I have is that I have no idea where to start on generating a map randomly. It would need to have terrain sections (Like a part of it will be sand, part dirt, etc.) Similar to how Minecraft is where you have different biomes and they seamlessly transform into each other. Lastly I would also need to add random paths into this as well going in different directions all over the map. I'm not asking anyone to write me all the code or anything, just piont me into the right direction please. tl;dr - Generate a tile map with biomes, paths and make sure the biomes seamlessly go into each other.

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  • How do I handle specific tile/object collisions?

    - by Thomas William Cannady
    What do I do after the bounding box test against a tile to determine whether there is a real collision against the contents of that tile? And if there is, how should I move the object in response to that collision? I have a small object, and test for collisions against the tiles that each corner of it is on. Here's my current code, which I run for each of those (up to) four tiles: // get the bounding box of the object, in world space objectBounds = object->bounds + object->position; if ( (objectBounds.right >= tileBounds.left) && (objectBounds.left <= tileBounds.right) && (objectBounds.top >= tileBounds.bottom) && (objectBounds.bottom <= tileBounds.top)) { // perform specific test to see if it's a left, top , bottom // or right collision. If so, I check to see the nature of it // and where I need to place the object to respond to that collision... // [THIS IS THE PART THAT NEEDS WORK] // if( lastkey==keydown[right] && ((objectBounds.right >= tileBounds.left) && (objectBounds.right <= tileBounds.right) && (objectBounds.bottom >= tileBounds.bottom) && (objectBounds.bottom <= tileBounds.top)) ) { object->position.x = tileBounds.left - objectBounds.width; } // etc.

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  • List of usage information to collect in a web application

    - by Thomas Levine
    I'm writing a web application that will allow people to create accounts, edit stuff, send stuff to people, &c. I plan on recording things like when things were created and sent and stuff. Is there a list of usage information that one should collect in a web application? I'd like to see whether I'm missing something. Also, is there a list of usage information that I shouldn't collect (Like maybe information that people find private)?

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  • how to setup a webhosting site ?

    - by Thomas John
    Hi all, I have purchased a cPanel/WHM web hosting reseller account and I want to set up a site for people to set up a hosting accounts. I also would like to have a domain name registration system on the site, so people can register the domain name they would like to host with me. How can I do this? Are there any ready-made scripts available or should I create my own script using the WHM API? Thanks a lot.

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  • All day optimizer event....

    - by noreply(at)blogger.com (Thomas Kyte)
    I've recently taken over some of the responsibilities of Maria Colgan (also known as the "optimizer lady") so she can move onto supporting our new In Memory Database features (note her new twitter handle for that: https://twitter.com/db_inmemory ).To that end, I have two one day Optimizer classes scheduled this year (and more to follow next year!).  The first one will be Wednesday November 20th in Northern California.  You can find details for that here: http://www.nocoug.org/ .The next one will be 5,500 miles (about 8,800 km) away in the UK - in Manchester.  That'll take place immediately following the UKOUG technical conference taking place the first week of December on December 5th.  You can see all of the details for that here: http://www.ukoug.org/events/tom-kyte-seminar-2013/I know I'll be doing one in Belgrade early next year, probably the first week in April. Stay tuned for details on that and for more to come.

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  • How can I strip down Ubuntu?

    - by Thomas Owens
    I'm trying to fix what I consider a bloated install of Ubuntu. When I install Ubuntu on a machine, I get things that I don't want - web browsers, office applications, media players, accessibility utilities, Ubuntu One, and so on. My goal is to create a way that I can have an install of Ubuntu that contains only the most minimal packages - the administrative tools and package manager, a GUI (my preference would be GNOME), a text editor, core drivers (video cards, network cards - wired and wireless, input devices), and anything else that I have to have to run a stable distribution. From there, I would like to pick and choose which packages I install to create my own customized system. After playing around with other distros like Arch and Slackware, like how they provide a barebones install by default. However, I get trapped in a "configuration hell" - right now, I tried moving away from Ubuntu and to Arch, but after spending 6 hours with it, I still don't have a usable system. It's half configured and I don't have any usable software packages to enable me to work. Is anything that can help me available? Either something like the OpenSUSE builder that lets you choose applications and packages for the CD, an advanced installation mode where I can choose the packages to install and which to ignore, or a guide on how to strip Ubuntu down to its bare bones? And I suppose a natural follow up to this is once I have a stripped down Ubuntu, will this affect updating at all? When Canonical releases the next version of Ubuntu, I don't want any bloatware reinstalled. And yes, most of the applications that come with Ubuntu, I simply don't use. Ever.

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  • Lucid hangs at booting after kernel upgrade

    - by Thomas Deutsch
    This weekend, one of our servers running Lucid has installed some upgrades: libgcrypt11 1.4.4-5ubuntu2.1 linux-firmware 1.34.14 linux-image-2.6.32-41-generic 2.6.32-41.91 linux-libc-dev 2.6.32-41.91 Afterwards, it rebooted since this was a kernel upgrade. Now, it hangs at booting, after /scripts/init-bottom. init-bottom itself should not be the problem, the last line I can see is "done". So the problem has to be shortly after that. http://manpages.ubuntu.com/manpages/hardy/man8/initramfs-tools.8.html tells me, that the next step is procfs and sysfs are moved to the real rootfs and execution is turned over to the init binary which should now be found in the mounted rootfs. But I don't know how and where. The problem exists with older kernels too, and this one here doesn't fix the problem: http://www.tummy.com/journals/entries/jafo_20111003_160440 Anyone an idea?

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  • Purple/Pink lines on screen after login on Ubuntu Desktop 13.04

    - by Thomas May
    I downloaded Ubuntu 13.04 and I loaded up the live system. It loaded up fine but when I clicked on the Ubuntu logo purple and pink lines appeared on screen and they didn't go away so I thought that if I installed the OS it would be fine so I installed the OS, logged in and lo and behold the purple and pink lines where back. My video card is nVidia N force (I think) Anyone having the same problem???

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  • Modern.IE VM license

    - by Thomas W.
    Microsoft provides some VMs for testing purposes (advertised on StackOverflow) and I'm trying to understand the license terms. The one I don't really understand is 1.b. You may use the software for testing purposes only. You may not use the software for commercial purposes. My thoughts: a) Testing a website in several browsers on several different virtual machines seems a quite professional approach. I hardly believe many private developers would do that. Of course they should, but which private developer has the time to do so? b) If that's really only available to private developers, what is the offer to companies doing the same thing? I am missing the advertisement for a paid service. My question as a non-native English speaker: Is testing by a company considered as a commercial purpose? Can I use the VMs within a company for testing or not?

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  • Neue Version der Oracle Fusion Middleware 11gR1

    - by Thomas Leopold
    Oracle Fusion Middleware 11g R1 Patch Set 3 (11.1.1.4.0) ist verfügbar. Wichtige Neuerungen und Fixes bei WebLogic Server, BPM, SOA und WebCenter Suite und weiteren Komponenten stehen damit unseren Kunden zur Verfügung. Eine umfangreiche Liste sowie die Informationen zum Herunterladen findet ihr in der Langversion dieses Artikels (einfach 'mehr ...' klicken). Und natürlich gibt es auche eine neue Dokumentation zu Version 11.1.1.4.0 (Patch Set 3). Wir sind mit SOA Suite und BPM Suite führend im Bereich der Integrationslösungen.Artikel auf technology.de lesen ...

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  • Where is the line drawn with domain names which include a trademark?

    - by Thomas Clayson
    A search on google for "iphone developer" turns up loads of websites which have "iphone" in them, a trademarked name by Apple. So I'm led to believe that having a domain such as iphonedeveloper.com is ok? Well, you're still using Apple's trademark, but it would be hard to brand yourself otherwise. You're an IPHONE DEVELOPER... right? Well, what if I want to provide a website where users pay to get a list of the best offers from Ebay? I might have a domain like ebaydeals.com (I don't... i'm just speculating!). Now I've heard that places like Ebay are really hot on the trigger and fire out emails to people who register domains like that straight away. But whats the difference? In both cases I'm making money from the trademark, effectively, so is it just down to how lenient the company who owns the trademark is? Or are there rules? Is there a specific "line" you don't cross? Thanks

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  • Script to determine the SSL certificate assigned to each site

    - by Thomas
    I have a IIS6 web server with 100+ sites on it. Recently, I was forced to renew my wildcard SSL certificate which all the sites use by creating a new CSR request rather than a renew CSR request. I have installed the certificate and can update each site one at a time to use the new certificate however, I was wondering whether: There is a way to update every site at the same time and If there was a script I can use to view which certificate is currently being used by each site.

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  • Should I have seperate business and personal websites?

    - by Thomas Clowes
    I have my business website - I am a web designer and developer, and also buy/sell websites/domain names. As such my website links to 'Our sites' = the websites which we design and run as well as a variety of tools such as a domain whois tool. These are obviously relevant to the business. As an individual, I like to travel and do white water kayaking as a hobby. I also have a degree in economics. I have thus created a blog on my business website where I write about domain names, web design, kayaking, travelling and economics. I've just begun researching SEO and am looking into optimizing my business website. I don't actually directly offer any services to clients at the moment, my main aim is to have a business website which supports my websites. If for example a potential advertise on one of my sites checks out the business website, I want them to think professional, down to earth, quirky. Given this is having my business/personal interests intertwined a problem? For SEO.. on my homepage for example when I'm writing a headline and a paragraph about what we do.. what do I put? and how do I optimize for SEO with keywords and the like? Further to the above, my company sponsors me and a group of accquantances as a kayaking team.. as such my personal interests do sort of overlap (just to add a complexity :))

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  • Deferred Open Source licensing

    - by Thomas W.
    Are there established models for releasing an initially proprietary piece of software under FLOSS conditions after a defined period or a certain point of time? The main problem here is that all parties involved must be able to trust that the Open Source licensing will actually take place at the defined time and no party can further defer or cancel this process. Clearly such a model has its problems, for example it's problematic to deal with contributions from "outside", legally and technically. Ghostscript is a prominent example where a deferred model has been used and abandoned. However, if certain parties involved will insist on keeping the software proprietary, at least for a certain period of time, then the only options are a deferred Open Source licensing model or no Open Source licensing at all. I think I read about services that serve as trusted parties who take care of Open Sourcing the software. However, I was not successful in spotting any of those.

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