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  • Dadaism and Agility

    - by alexhildyard
    We all have our little bugbears, and something that has given me particular pause over the years is the place of Agility in the software development life cycle. While I have seen it used successfully on both small and Enterprise-level projects, I have also seen many instances in which long-standing technical debt has also originated under its watch. Ironically the problem in such cases seems to me not that the practitioners in question have failed to follow due process (Test, Develop, Refactor -- a common "what" of Agile), but basically that they have missed the point (the "why" of Agile). It's probably a sign of my age that I'm much more interested in the "why" than the "what", since I feel that the latter falls out naturally from the former, but that this is not a reciprocal relationship.Consider Dadaism, precursor to the Surrealist movement in the early part of the twentieth century. Anyone could stand up and proclaim he or she was Dada; anyone could write cut-ups, or pull words out a hat, or produce gibberish on duelling typewriters under the inspiration of Dada. And all that took place at such performances was a manifestation of Dada, and all the artefacts that resulted were also Dada. Hence one commentator's engimatic observation that 'when one speaks of Dada, then one speaks of Dada. But when one does not speak of Dada, one still speaks of Dada.'What is Dada? Literally, Dada is what you say it is. But that's also missing the point. Dada is about erecting a framework within which utterances like this are valid; Dada is about preparing a stage for itself. Dadaism exemplifies the purity of a process-driven ideology -- in fact an ideology that is almost pure process, with nothing extraneous in the way of formal method, and while perhaps Agile delivery should not embrace the liberties of Dadaism too literally, some of the similarities nevertheless are salutary.Agile -- like Dada -- is an attitude; it is about *being* agile; it is not really about doing a specific set of things that are somehow *part* of being Agile. It is an abstract base rather than an implementation, a characteristic rather than a factor. It is the pragmatic response to the need for change in the face of partial information, ephemeral requirements and a healthy dose of systematic uncertainty. In practice this will usually mean repeatedly making the smallest useful changes to a system, recognising that systems evolve, and that all change carries risk. It will usually mean that instead of investing effort in future-proofing a system against a known technology roadmap, one instead invests one's energies in the daily repetition and incremental development of processes best designed to accommodate change quickly. But though it may mean these things in practice, it isn't actually *about* either of these things; it's about the mindset, the attitude that conceives of such responses as sensible solutions given the larger and ultimately unclassifiable thing that constitutes the development lifecycle of a specific project.

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  • Why does Inkscape become unresponsive all of the sudden and how can I stop it from happening?

    - by klenwell
    I've just started using Inkscape in Ubuntu 11.10 and I'm not sure what exactly triggers it, but at some point, the Inkscape viewport becomes unresponsive. The viewport is still visible. I can still manipulate the window itself: move, resize, open menu items at top. The cursor switches style. But clicking on anything within the viewport has no effect. I must close the file and restart in order to regain control.

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  • Facebook android app changes

    - by jogabonito
    I am referring to this article about how Facebook has rolled out a native app for android replacing their previous HTML5 based one. From my usage, things have definitely become much faster. I was wondering whether this native app is purely java based, or involves some JNI. Image loading for one has become faster, which is generally not thought of as a java strong point. (IMHO) Are there any details on what Facebook has done?

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  • Intersection points of plane set forming convex hull

    - by Toji
    Mostly looking for a nudge in the right direction here. Given a set of planes (defined as a normal and distance from origin) that form a convex hull, I would like to find the intersection points that form the corners of that hull. More directly, I'm looking for a way to generate a point cloud appropriate to provide to Bullet. Bonus points if someone knows of a way I could give bullet the plane list directly, since I somewhat suspect that's what it's building on the backend anyway.

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  • SQLU Professional Development Week: The Difference Between Your Business and Community Presence

    - by andyleonard
    Introduction Proto-earth , dinosaurs , and the days when your personal and business profiles were separate and distinct. What do these things all have in common? They are all in the past. Background Checks Corporate background checks now routinely include a search for social media profiles, forum posts, and blogs. As professionals are learning, the things you say and do in your "off-work hours" can and will be used against you - even after you're hired and have been doing the job awhile . One point?...(read more)

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  • LTSP thin client to single user mode

    - by DJC
    Is it possible to boot a LTSP thin client to single user mode? I've updated the default entry under /var/lib/tftpboot/ltsp/i386/pxelinux.cfg to read as follows: - append ro initrd=initrd.img root=/dev/nbd0 init=/sbin/init-ltsp nomodeset quiet splash **single** plymouth:force-splash vt.handoff=7 nbdroot=:ltsp_i386 This kind of works! I see the boot progress to the point where it asks me to either enter the root password or Ctrl+D to bypass. However, the boot process just seems to continue without providing an chance to do either.

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  • How Do I Do Alpha Transparency Properly In XNA 4.0?

    - by Soshimo
    Okay, I've read several articles, tutorials, and questions regarding this. Most point to the same technique which doesn't solve my problem. I need the ability to create semi-transparent sprites (texture2D's really) and have them overlay another sprite. I can achieve that somewhat with the code samples I've found but I'm not satisfied with the results and I know there is a way to do this. In mobile programming (BREW) we did it old school and actually checked each pixel for transparency before rendering. In this case it seems to render the sprite below it blended with the alpha above it. This may be an artifact of how I'm rendering the texture but, as I said before, all examples point to this one technique. Before I go any further I'll go ahead and paste my example code. public void Draw(SpriteBatch batch, Camera camera, float alpha) { int tileMapWidth = Width; int tileMapHeight = Height; batch.Begin(SpriteSortMode.Texture, BlendState.AlphaBlend, SamplerState.PointWrap, DepthStencilState.Default, RasterizerState.CullNone, null, camera.TransformMatrix); for (int x = 0; x < tileMapWidth; x++) { for (int y = 0; y < tileMapHeight; y++) { int tileIndex = _map[y, x]; if (tileIndex != -1) { Texture2D texture = _tileTextures[tileIndex]; batch.Draw( texture, new Rectangle( (x * Engine.TileWidth), (y * Engine.TileHeight), Engine.TileWidth, Engine.TileHeight), new Color(new Vector4(1f, 1f, 1f, alpha ))); } } } batch.End(); } As you can see, in this code I'm using the overloaded SpriteBatch.Begin method which takes, among other things, a blend state. I'm almost positive that's my problem. I don't want to BLEND the sprites, I want them to be transparent when alpha is 0. In this example I can set alpha to 0 but it still renders both tiles, with the lower z ordered sprite showing through, discolored because of the blending. This is not a desired effect, I want the higher z-ordered sprite to fade out and not effect the color beneath it in such a manner. I might be way off here as I'm fairly new to XNA development so feel free to steer me in the correct direction in the event I'm going down the wrong rabbit hole. TIA

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  • iwconfig, iw not displaying wireless information

    - by Srivatsa Kanchi
    after fresh install to 12.10, the wireless information is not shown by both iwconfig and iw. The wireless sets up successfully and able to connect This is what i get $ iwconfig wlan0 wlan0 IEEE 802.11abgn ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=14 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off $ iw wlan0 link Not connected. $ uname -a Linux srivatsa-ThinkPad-T61 3.5.0-18-generic #29-Ubuntu SMP Fri Oct 19 10:26:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

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  • Why is my arrow texture being drawn in odd places?

    - by tyjkenn
    This is a script I wrote that places an arrow on the screen, pointing to an enemy off-screen, or, if the enemy is on-screen, it places an arrow hovering above the enemy. Everything seems to work, except for some odd reason, I see random arrows floating around, often skewed and resized (which I really don't understand, because I only rotate and place in this script). Even when I only have one enemy in the scene, I still see these random arrows. It should only be drawing one per enemy. Note: when all enemies are removed, no arrows appear. var arrow : Texture; var cam : Camera; var dim : int = 30; function OnGUI() { var objects = GameObject.FindGameObjectsWithTag("Enemy"); for(var ob : GameObject in objects) { var pos = cam.WorldToViewportPoint(ob.transform.position); if(gameObject.GetComponent(FollowCamera).target != null){ var tar = gameObject.GetComponent(FollowCamera).target.parent; } if(pos.z>1 && ob.transform != tar){ var xDiff = (pos.x*cam.pixelWidth)-(cam.pixelWidth/2); var yDiff = (pos.y*cam.pixelHeight)-(cam.pixelHeight/2); var angle = Mathf.Rad2Deg*Mathf.Atan(yDiff/xDiff)+180; if(xDiff>0) angle += 180; var dist = Mathf.Sqrt(xDiff*xDiff + yDiff*yDiff); var slope = yDiff/xDiff; var camSlope = cam.pixelHeight/cam.pixelWidth; var theX = -1000.0; var theY = -1000.0; var mult = 0; var temp; if(Mathf.Abs(xDiff)>(cam.pixelWidth/2)||Mathf.Abs(yDiff)>(cam.pixelHeight/2)){ //touching right if(slope<camSlope && slope>-camSlope) { if(xDiff>(cam.pixelWidth/2)) { theX = cam.pixelWidth - (dim/2); mult = -1; }else if(xDiff<-(cam.pixelWidth/2)) { theX = (dim/2); mult = 1; } temp = ((cam.pixelWidth/2)*yDiff)/xDiff; theY =(cam.pixelHeight/2)+(mult*temp); } else{ if(yDiff>(cam.pixelHeight/2)) { theY = (dim/2); mult = 1; }else if(yDiff<-(cam.pixelHeight/2)) { theY = cam.pixelHeight - (dim/2); mult = -1; } temp = ((cam.pixelHeight/2)*xDiff)/yDiff; theX =(cam.pixelWidth/2)+(mult*temp); } } else { angle = -90; theX = (cam.pixelWidth/2)+xDiff; theY = (cam.pixelHeight/2)-yDiff-dim; } GUIUtility.RotateAroundPivot(-angle, Vector2(theX, theY)); Graphics.DrawTexture(Rect(theX-(dim/2),theY-(dim/2),dim,dim),arrow,null); GUIUtility.RotateAroundPivot(angle, Vector2(theX, theY)); } } }

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  • T-SQL Tuesday #19: Blind Spots

    - by merrillaldrich
    A while ago I wrote a post, Visualize Disaster , prompted by a real incident we had at my office. Fortunately we came through it OK from a business point of view, but I took away an important lesson: it’s very easy, whether your organization and your team is savvy about disaster recovery or not, to have significant blind spots with regard to recovery in the face of some large, unexpected outage. We have very clear direction and decent budgets to work with, and the safety and recoverability of applications...(read more)

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  • Deletes that Split Pages and Forwarded Ghosts

    - by Paul White
    Can DELETE operations cause pages to split? Yes. It sounds counter-intuitive on the face of it; deleting rows frees up space on a page, and page splitting occurs when a page needs additional space. Nevertheless, there are circumstances when deleting rows causes them to expand before they can be deleted. The mechanism at work here is row versioning (extract from Books Online below): Isolation Levels The relationship between row-versioning isolation levels (the first bullet point) and page splits is...(read more)

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  • Ubuntu App Submission won't allow the "free" bubble to be checked

    - by Compt
    I am at the final stages of the Ubuntu App Developer Showdown, and I'm right at the point where I am submitting my app. The problem I run in to however, is that even though buy is at $0.00, it will not allow me to click on the "free" button, and keep that configuration saved. So when I go to "preview your app", it shows it saying "USD $0.00 ---- Buy" instead of saying "Free ---- Install". So I was wondering if it makes any difference or not.

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  • any refresher courses on java enterprise [on hold]

    - by f1wade
    hi can anyone surggest anywhere or any online material, that will serve as a short (1 day) course to cover the basics of spring, hibernate, webflow, richfaces, jsf, beans I am trying to find one that just covers the basics, (how to create this, this and this, and heres another way, these are the options) kind of course. i'm looking for something more point blank, and quick, something i can jot down notes, and then use them back at my application code base. can anyone suggest anywhere, online, or local to nottingham / derby / leicester, UK please.

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  • Could not display chart. The control is not properly registered. (4 replies)

    I've seen other people raise this in searching the web but can't find any definitive answers so apologies if this has been answered previously (but please point me in that direction). I have two XP Pro SP2 workstations one works fine in that it shows the result graphs in ACT (v1.0.536.0) and the other gives the error &quot;Could not display chart. The control is not properly registered.&quot;. Both systems ...

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  • permission denied to move files

    - by James
    i want to clear space on my computer in order to download drivers for my internet, so i tried moving files to a different location, unfortunately i dont have permission to do this, how do i change this, i should point out that i am not logged in, i think im a guest or something because if i log in i can not gain access to the internet to download the drivers that i need, so im using the cd and using the try ubunt feature to try achieve downloading the drivers. this is very frustrating for me as im new and have not got a clue how to do this

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  • The Unity Linux Build Server

    <b>Unity Linux:</b> "The developers at Unity Linux have been working hard on expanding our package repositories. At this point, there are well over 8600 packages for each of the i586 and x86_64 architectures."

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  • Microsoft donne PhotoDNA à la police pour lutter contre la pédophilie sur le Net, un fléau en progression constante d'après l'éditeur

    Microsoft offre PhotoDNA aux forces de l'ordre pour lutter contre les pédophiles Un fléau en progression constante d'après la Digital Crimes Unit de l'éditeur En 2009, Microsoft mettait au point avec l'Université privée Darthmouth College, située dans la ville de Hanover aux Etats-Unis, une technologie baptisée PhotoDNA. Cette dernière permet de mieux traquer les images à caractère pédophile qui polluent la Toile. Offerte dans un premier temps au National Center for Missing and Exploited Children (Centre National de Recherche des Enfants Disparus et Exploités ou NCMEC), une organisation américaine travaillant avec le ministère de la justice, elle était proposée aux différents fournisseurs...

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  • Proper Link Building - The Keystroke to Better Search Engine Page Ranking

    The SEO and the SEM are the tools to get a website within the top ten ranking on the search engine result pages. The ranking on the search engine result pages is the most essential thing needed for any website to get the maximum volume of web traffic to their site. In fact the point is that it is no good to launch a website if it remains out of the sight of the internet users.

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  • Anonymous Indonésie et Australie bientôt en cyber guerre ? Le ton monte entre les membres du collectif

    Anonymous Indonésie et Australie bientôt en cyber guerre ? Le ton monte entre les membres du collectif Les révélations d'Edward Snowden sèment de plus en plus de trouble aux seins des coalitions. Après les Etats-Unis et ses alliés européens, c'est maintenant le collectif Anonymous qui se voit divisé. En effet la menace d'une cyber guerre plane entre les Anonymous d'Indonésie et ceux d'Australie. Le point de départ ? La NSA et l'ASD, son équivalent australien, auraient espionnés des membres...

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  • Google Docs : arrivée des discussions et des commentaires collaboratifs, une nouveauté issue de Google Wave

    Google Docs : arrivée des discussions et des commentaires collaboratifs Inspirés de Google Wave Mise à jour du 17/03/2011 par Idelways Co-écrit avec Gordon Fowler Google est sur le point d'intégrer une dimension collaborative supplémentaire à son outil de traitement de texte en ligne « Google Docs » pour faciliter et améliorer la communication entre les personnes impliquées dans la rédaction d'un même document. Jusque-là, la communication autour du travail commun d'un document se limitait à l'insertion de commentaires. Désormais, il est possible de créer des discussions structurées et thématisée...

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  • HTG Explains: When Do You Need to Update Your Drivers?

    - by The Geek
    Talk to any tech person, read any forum, and at some point you’re sure to be told to update your drivers… but what does that really mean? And is it necessary to compulsively update your drivers? Here’s our take. HTG Explains: When Do You Need to Update Your Drivers? How to Make the Kindle Fire Silk Browser *Actually* Fast! Amazon’s New Kindle Fire Tablet: the How-To Geek Review

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  • Un chercheur remet en question la gestion des failles de sécurité des projets open source et propose quelques bonnes pratiques

    Un chercheur remet en question la gestion des failles de sécurité des projets open source et propose quelques bonnes pratiques Jusqu'à quel point les communautés en charge des projets open source sont réactives face à la publication des rapports de vulnérabilité ?Un chercheur indépendant nommé Brandon Perry a réalisé un audit de sécurité pour sept logiciels open source populaires à savoir Moodle, vTiger CRM, Zabbix, ISPConfig, OpenMediaVault, NAS4Free et Openbravo ERP, tous domiciliés sur sourceforge.Rapidement,...

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