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	<title>blog.ahzf.de &#187; Research</title>
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	<link>http://blog.ahzf.de</link>
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		<title>Google Wave &#8211; A Revolution done wrong!</title>
		<link>http://blog.ahzf.de/index.php/2009/10/08/google-wave-a-revolution-done-wrong/</link>
		<comments>http://blog.ahzf.de/index.php/2009/10/08/google-wave-a-revolution-done-wrong/#comments</comments>
		<pubDate>Wed, 07 Oct 2009 23:06:53 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Future Internet]]></category>
		<category><![CDATA[Software Development]]></category>
		<category><![CDATA[The old Internet]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=609</guid>
		<description><![CDATA[What might E-Mail look like if it were invented by&#8230; Linus Torvalds&#8230; the OSS-Community&#8230; the XMPP-Guys&#8230; or any company without central servers within their buisness plan? To me Google Wave is not much more than an IMAP-Server with integrated CSV-Log and a nice GUI. If you remember Linux Torvalds talk on the GIT at Google [...]]]></description>
			<content:encoded><![CDATA[<p>What might E-Mail look like if it were invented by&#8230; Linus Torvalds&#8230; the OSS-Community&#8230; the XMPP-Guys&#8230; or any company without central servers within their buisness plan? To me Google Wave is not much more than an IMAP-Server with integrated CSV-Log and a nice GUI. If you remember <a href="http://www.youtube.com/watch?v=4XpnKHJAok8" target="_blank">Linux Torvalds talk on the GIT at Google Talk</a> (or better its rant against Google sourcecode management) you will be sure, that E-Mail invented by Linux would at least be as decentralized like the GIT or XMPP. Therefore Google Wave might be a very big hype but neither a technological break-through nor a great vision on the future of communicatiuon and collaboration.</p>
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		</item>
		<item>
		<title>Upcoming &#8220;Future Internet&#8221; events&#8230;</title>
		<link>http://blog.ahzf.de/index.php/2009/04/28/upcoming-future-internet-events/</link>
		<comments>http://blog.ahzf.de/index.php/2009/04/28/upcoming-future-internet-events/#comments</comments>
		<pubDate>Tue, 28 Apr 2009 22:25:41 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Future Internet]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=535</guid>
		<description><![CDATA[At least German events  

 GI/ITG KuVS Fachgespräch Future Internet
May 28th, 2009 in Munich, Germany
http://www.docomoeurolabs.de/FI/cfp.html
Deadline: May 6, 2009


9th Würzburg Workshop on IP:
Joint ITG and EuroNF Workshop
&#8220;Visions of Future Generation Networks&#8221;
(EuroView2009)
July 27th &#8211; July 28th 2009 Würzburg, Germany
http://www3.informatik.uni-wuerzburg.de/euroview/2009/
Deadline: May 22, 2009

]]></description>
			<content:encoded><![CDATA[<p>At least German events <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> </p>
<ul>
<li> <strong>GI/ITG KuVS Fachgespräch Future Internet</strong><br />
May 28th, 2009 in Munich, Germany<br />
<a href="http://www.docomoeurolabs.de/FI/cfp.html">http://www.docomoeurolabs.de/FI/cfp.html</a><br />
Deadline: May 6, 2009</li>
</ul>
<ul>
<li>9th Würzburg Workshop on IP:<br />
Joint ITG and EuroNF Workshop<br />
<strong>&#8220;Visions of Future Generation Networks&#8221;<br />
(EuroView2009)</strong><br />
July 27th &#8211; July 28th 2009 Würzburg, Germany<br />
<a href="http://www3.informatik.uni-wuerzburg.de/euroview/2009/">http://www3.informatik.uni-wuerzburg.de/euroview/2009/</a><br />
Deadline: May 22, 2009</li>
</ul>
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		<item>
		<title>Science-Tology</title>
		<link>http://blog.ahzf.de/index.php/2009/04/13/science-tology/</link>
		<comments>http://blog.ahzf.de/index.php/2009/04/13/science-tology/#comments</comments>
		<pubDate>Mon, 13 Apr 2009 11:33:51 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Research]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=515</guid>
		<description><![CDATA[Die 10 wichtigsten Merkmale eines universitären Fachgebietes:
1. Das Fachgebiet ist die Wahrheit. Die Einsicht, die von der Fachgebietsleitung offenbart wurde, ist heilig und erhaben über jedliche Kritik. Peer-Review sichert die Originalität, Brisanz und den Wert dieser Wahrheit und offenbart die Unzulänglichkeit anderer Meinungen.

2. Das Wissen des Fachgebietes ist hierarchisch und esoterisch. Anfänger erhalten nicht Zugang [...]]]></description>
			<content:encoded><![CDATA[<p><span><span>Die 10 wichtigsten Merkmale eines universitären Fachgebietes:</span></span></p>
<p><span><span>1. <strong>Das Fachgebiet ist die Wahrheit.</strong> Die Einsicht, die von der Fachgebietsleitung offenbart wurde, ist heilig und erhaben über jedliche Kritik. Peer-Review sichert die Originalität, Brisanz und den Wert dieser Wahrheit und offenbart die Unzulänglichkeit anderer Meinungen.<br />
</span></span></p>
<p><span><span>2. <strong>Das Wissen des Fachgebietes ist hierarchisch und esoterisch</strong>. Anfänger erhalten nicht Zugang zu jeder Erkenntnis und Information. Dieses Wissen wird verborgen und ist unter Kontrolle der Fachgebietsleitung. Erst nach einer Bewährungszeit allgegenwärtigem Gehorsams und unwidersprochener Unterwürfigkeit kann man sich den Zugang zu dem Wissen der nächsten</span></span><span><span> Hierachie</span></span><span><span> verdienen.</span></span></p>
<p><span><span> </span></span></p>
<p><span><span>3. <strong>Das Fachgebiet entwickelt eine eigene Sprache, die zu einem geschlossenen Universum wird.</strong> Die Sprache bezieht sich in einem geschlossenen logischen Kreis &#8211; </span></span><span><span>auf sich selbst</span></span><span><span>. Sie wirkt gedankenstoppend und es ist schwierig ihr nicht zu verfallen. Sie ist oft mythisch, selten rational. Nur wer es versteht, ist drin. Wer nicht – ist minderwertig, ist Feind.</span></span></p>
<p><span><span>4. <strong>Mitglieder ändern nach dem Eintritt ihre Identität. </strong>Sie bekommen neue erhabene Titel, gerne auch Ketten mehrerer Titel die sie als Teil der neuen Gemeinschaft kennzeichnen. Die alte Identität wird schikaniert. Bisherige Verbindungen bezüglich Ökonomie, Familie, Arbeit und Freundschaft werden radikal geändert. Der Kontakt zu Nichtmitgliedern ist verpönt. </span></span></p>
<p><span><span>5. <strong>Das Fachgebiet übernimmt die soziale Kontrolle</strong>. Die Forderung nach Reinheit bedeutet, dass Zeit, Geld, Zugang zu anderer Information und die Grundlage für Beschlüsse von der Fachgebietsleitung mittels demokratisch </span></span>legimentierter<span><span> Strohmänner/-frauen kontrolliert werden müssen. Was man darüberhinaus in seiner „Freizeit“ tut, findet größtenteils im Universitätsumfeld statt und führt das Mitglied mit anderen Mitgliedern der Hierarchie zusammen.</span></span></p>
<p><span><span>6. <strong>Der Fachgebietsleiter hat die Macht</strong>. Es gibt normalerweise einen Leiter und die Organisation ist wie eine Pyramide um ihn herum aufgebaut. Er rekrutiert neue Mitglieder, die ihn zitieren und in seine Fußstapfen treten. Diese wiederum müssen weitere Anfänger (Studenten, Hilfskräfte, &#8230;) rekrutieren, um zitiert zu werden und um die eigentliche Arbeit an diese zu delegieren.</span></span></p>
<p><span><span>7. <strong>Das Fachgebiet hat starke und einfache Feindbilder</strong>. Der äußere Feind und das Böse sind außerhalb des Fachgebietes, die Guten sind innerhalb. Diejenigen außerhalb des Fachgebietes haben oder bekommen eine minderwertige Existenz (landen z.B. in EU-Projekten o. dgl.).</span></span><span><span style="font-family: Arial; font-size: medium;"></span></span></p>
<p><span><span>8. <strong>Das Fachgebiet hält einen inneren Feind am Leben</strong>. Das Böse ist auch innerhalb zu finden. Meist in Form von unüberprüften Zitaten, allgemeingültigen Schlussfolgerungen und Strg+C. Das ist gut, sofern man diese Verfehlungen bekennt. So entsteht eine Kultur des Bekenntnisses. Wer nicht teilnimmt, wird ausgeschlossen.</span></span><span><span style="font-family: Arial; font-size: medium;"></span></span></p>
<p><span><span>9. <strong>Der Zweck heiligt die Mittel</strong>. Wissenschaftliche Moralsysteme, Best-Practices, Publikationregeln, Forschungsschwerpunkte sind unhinterfragte Gebote. Das Mitglied muss sich überlegen, was ihm wichtiger ist: Qualität oder Quantität der Publikationen.</span></span><span><span style="font-family: Arial; font-size: medium;"></span></span></p>
<p><span><span>10. <strong>Das Fachgebiet zu verlassen wird mit Sanktionen versehen</strong>. Der Weg nach oben involviert ein gewisses „Freizeitprogramm“ (siehe Punkt 5). Das Verlassen des Fachgebietes hinterlässt ein tiefes Loch und viel zu viel Zeit.</span></span></p>
<p>via <a href="http://www.academics.de/blog/index.php/aktuelle-themen/warum-nochmal-ach-ja/" target="_blank">VidW</a>, frei nach <a href="http://griess.st1.at/gsk/hareide.htm" target="_blank">F. Griess</a></p>
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		<item>
		<title>Game-theoretic Approaches to Security</title>
		<link>http://blog.ahzf.de/index.php/2009/01/15/game-theoretic-approaches-to-security/</link>
		<comments>http://blog.ahzf.de/index.php/2009/01/15/game-theoretic-approaches-to-security/#comments</comments>
		<pubDate>Thu, 15 Jan 2009 20:38:12 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Research]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=480</guid>
		<description><![CDATA[POSTDOC AND PHD POSITION IN SECURITY &#38; GAMES AT THE UNIVERSITY OF LUXEMBOURG
 &#8220;The project aims to develop new approaches to the design and
analysis of secure systems based on the observation that the
security of a system can be considered as the result of a game
between a defender and an attacker of the system. This observation
opens [...]]]></description>
			<content:encoded><![CDATA[<p>POSTDOC AND PHD POSITION IN SECURITY &amp; GAMES AT THE UNIVERSITY OF LUXEMBOURG<br />
<em> &#8220;The project aims to develop new approaches to the design and<br />
analysis of secure systems based on the observation that the<br />
security of a system can be considered as the result of a game<br />
between a defender and an attacker of the system. This observation<br />
opens up a wealth of analysis methods from the field of game<br />
theory. It is expected that game theoretic approaches have an impact<br />
on the design and analysis of fair-exchange protocols and other<br />
types of security protocols. Research will be conducted on the study<br />
of security attacks and counter-measures to prevent or mitigate such<br />
attacks. The project will focus on the application of non-zero sum<br />
games and games of imperfect information.&#8221;</em></p>
<p>WOW! The best idea for security research I have heard of in years! I&#8217;m sure this combination of research areas will reveal so very interessting new concepts.</p>
<blockquote><p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<br />
Requirements for the PhD student position:</p>
<p>- A master&#8217;s (or equivalent) degree in Computer Science, Mathematics<br />
or a related field, with a strong interest in Security. Knowledge in<br />
Game Theory is an advantage.<br />
- Inquisitiveness, commitment, and a critical attitude.<br />
- Very good written and oral English skills, a working knowledge in<br />
German and/or French is an advantage.</p>
<p>Requirements for the Postdoc position:</p>
<p>- A PhD in Computer Science, Mathematics, or a related field with<br />
expertise in security. Expertise in game theory is required.<br />
- A strong publication record.<br />
- Very good written and oral English skills, a working knowledge in<br />
German and/or French is an advantage.</p>
<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<br />
Application procedure:</p>
<p>The PhD student will be employed for a period of 3 or 4 years (40<br />
hrs/week). The Postdoc will be employed for a period of 3 years (40<br />
hrs/week). The  project will be supervised by Prof. Dr. Leon van der<br />
Torre and Prof. Dr. Sjouke Mauw.</p>
<p>The Postdoc and PhD student will be appointed by the University of<br />
Luxembourg. The Postdoc shall start on April 1, 2009 (or shortly<br />
after) and the PhD students shall start in the first half of 2009.</p>
<p>The remuneration for the PhD position is around 24.000 EUR/year netto,<br />
and for the Postdoc position between 43.000 and 52.500 EUR/year netto.</p>
<p>Deadline for application is February 20, 2009.</p>
<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<br />
Information:</p>
<p>For inquiries about the project and its positions, please contact<br />
Prof. Dr. Leon van der Torre (leon.vandertorre@uni.lu, +352<br />
4666445261) or Prof. Dr. Sjouke Mauw (sjouke.mauw@uni.lu, +352<br />
4666445480).</p></blockquote>
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		<item>
		<title>2nd GI/ITG KuVS Workshop on The Future Internet</title>
		<link>http://blog.ahzf.de/index.php/2008/11/12/2nd-giitg-kuvs-workshop-on-the-future-internet/</link>
		<comments>http://blog.ahzf.de/index.php/2008/11/12/2nd-giitg-kuvs-workshop-on-the-future-internet/#comments</comments>
		<pubDate>Wed, 12 Nov 2008 22:20:38 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Future Internet]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=440</guid>
		<description><![CDATA[Yesterday I attended another workshop on &#8220;The Future Internet&#8221; presented by the GI/ITG KuVS and located at the TH Karlsruhe &#8211; or more precisely at the impressive castle of Karlsruhe  .
There had been some interessing talks especially about my favorite transport protocol SCTP and the IETF&#8217;s first session layer protocol &#8220;RSerPool&#8221; (IETF charta), which [...]]]></description>
			<content:encoded><![CDATA[<p>Yesterday I attended another workshop on &#8220;<a href="http://www.tm.uka.de/events/FutureInternet2008/" target="_blank">The Future Internet</a>&#8221; presented by the <a href="http://www.kuvs.de/termine/KuVS-Future-Internet-2008" target="_blank">GI/ITG KuVS</a> and located at the <a href="http://www.uni-karlsruhe.de" target="_blank">TH Karlsruhe</a> &#8211; or more precisely at the impressive <a href="http://de.wikipedia.org/wiki/Schloss_Karlsruhe" target="_blank">castle of Karlsruhe</a> <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> .</p>
<p>There had been some interessing talks especially about my favorite transport protocol <a href="http://de.wikipedia.org/wiki/Stream_Control_Transmission_Protocol" target="_blank">SCTP</a> and the IETF&#8217;s first session layer protocol &#8220;<a href="http://de.wikipedia.org/wiki/Reliable_Server_Pooling" target="_blank">RSerPool</a>&#8221; (<a href="http://www.ietf.org/html.charters/rserpool-charter.html" target="_blank">IETF charta</a>), which will allow you to build reliable server pools using SCTP. There are also <a href="http://tdrwww.iem.uni-due.de/dreibholz/rserpool/" target="_blank">implementations</a> for both available from the <a href="http://www.uni-due.de/tdr/" target="_blank">University Duisburg-Essen</a>.</p>
<p>Additionally my <a href="http://www.ahzf.de/itstuff/publications/ELSSArchitecture-FutureInternet2008-Karlsruhe_Paper.pdf" target="_blank">paper</a> (<a href="http://www.ahzf.de/itstuff/publications/ELSSArchitecture-FutureInternet2008-Karlsruhe_Slides.pdf" target="_blank">slides</a>, <a href="http://www.ahzf.de/itstuff/publications/ELSSArchitecture-FutureInternet2008-Karlsruhe_BibTeX.txt" target="_blank">BibTeX</a>) on a  label-forwarding approach based approach was accepted <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
<p>More information on the European Future Internet activities can be found <a href="http://www.future-internet.eu/home.html" target="_blank">here</a> and <a href="http://eurongi.enst.fr" target="_blank">here</a>.</p>
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		<item>
		<title>Wie funktioniert eigentlich Wissenschaft?</title>
		<link>http://blog.ahzf.de/index.php/2008/11/03/wie-funktioniert-eigentlich-wissenschaft/</link>
		<comments>http://blog.ahzf.de/index.php/2008/11/03/wie-funktioniert-eigentlich-wissenschaft/#comments</comments>
		<pubDate>Mon, 03 Nov 2008 11:58:55 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Research]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=432</guid>
		<description><![CDATA[ 

Osterloh M. / Wagner, Gert G. (forthcoming) Anreize im Wissenschaftssystem, in: Wirtschaftsdienst, Heft 3.

Nachweislich also so gut wie gar nicht  


Peer-Review ist meist kaum zuverlässiger als ein Münzwurf. Ihre prognostische Qualität ist sehr gering. Zusätzlich werden die meisten Gutachten nicht von den Professoren selbst, sondern von ihren Mitarbeitern erstellt was die Qualität zusätzlich [...]]]></description>
			<content:encoded><![CDATA[<p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:HyphenationZone>21</w:HyphenationZone> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--  /* Style Definitions */  p.MsoNormal, li.MsoNormal, div.MsoNormal 	{mso-style-parent:""; 	margin:0cm; 	margin-bottom:.0001pt; 	mso-pagination:widow-orphan; 	font-size:12.0pt; 	font-family:"Times New Roman"; 	mso-fareast-font-family:"Times New Roman";} @page Section1 	{size:612.0pt 792.0pt; 	margin:70.85pt 70.85pt 2.0cm 70.85pt; 	mso-header-margin:36.0pt; 	mso-footer-margin:36.0pt; 	mso-paper-source:0;} div.Section1 	{page:Section1;} --><!--[if gte mso 10]> <mce:style><!   /* Style Definitions */  table.MsoNormalTable 	{mso-style-name:"Normale Tabelle"; 	mso-tstyle-rowband-size:0; 	mso-tstyle-colband-size:0; 	mso-style-noshow:yes; 	mso-style-parent:""; 	mso-padding-alt:0cm 5.4pt 0cm 5.4pt; 	mso-para-margin:0cm; 	mso-para-margin-bottom:.0001pt; 	mso-pagination:widow-orphan; 	font-size:10.0pt; 	font-family:"Times New Roman";} --> <!--[endif]--></p>
<p class="MsoNormal">
<p class="MsoNormal"><a href="https://www.unizh.ch/iou/orga/ssl-dir/wiki/uploads/Main/Anreize_final_12.9.08.pdf" target="_blank">Osterloh M. / Wagner, Gert G. (forthcoming) Anreize im Wissenschaftssystem, in: Wirtschaftsdienst, Heft 3.</a></p>
<p class="MsoNormal">
<p class="MsoNormal">Nachweislich also so gut wie gar nicht <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> </p>
<p class="MsoNormal">
<ul>
<li>Peer-Review ist meist kaum zuverlässiger als ein Münzwurf. Ihre<span> </span>prognostische Qualität ist sehr gering. Zusätzlich werden die<span> </span>meisten Gutachten nicht von den Professoren selbst, sondern von<span> </span>ihren Mitarbeitern erstellt was die Qualität zusätzlich belastet.</li>
<li>Gutachten versuchen überwiegend falsche Hypothesen auszusortieren<span> </span>um die Verschwendung von Forschungsmitteln zu verhindern, statt<span> </span>zurückgewiesene aber richtige Hypothesen zu finden, was -<span> </span>übertrieben dargestellt &#8211; Menschenleben kosten kann.</li>
<li>Autoren passen sich einerseits opportunistisch und in<span> </span>unwissenschaftlicher Art und Weise dem Peer-Review-System an<span> </span>(&#8221;akademische Prostitution&#8221;) und &#8220;old boys networks&#8221; unterlaufen<span> </span>gezielt dieses Qualitätskontrollwerkzeug.</li>
<li>Veröffentlichungen die der allgemeinen Lehrmeinung widersprechen<span> </span>werden signifikant häufiger auf Grund von methodischen Gründen<span> </span>abgelehnt. Wodurch die Mehrheit der Studierenden ebenfalls nur<span> </span>noch selten abweichende Lehrmeinungen hören.</li>
<li>Erfolgsabhängige W-Besoldung, Ziel- und Leistungsvereinbahrungen<span> </span>und die Realität, dass nur die Erstveröffentlichung zählt fördern<span> </span>eher die dunkle Seite der Wissenschaft wie Konkurrenzkampf<span> </span>und Sabotage statt interdisziplinäre Kooperation und nehmen bewusst<span> </span>in Kauf, dass Wissenschaftler sich mehr mit der Optimierung der<span> </span>Bezahlung statt mit ihrer Wissenschaft kümmern. Intrinsische<span> </span>Gründen &#8211; die Liebe zur Wissenschaft &#8211; wird verdrängt.</li>
<li>Exzellenzinitiativen u.ä. fördern &#8220;research empires&#8221; welche unterm<span> </span>Strich weniger effizient forschen als kleine, autonome Teams<span> </span>gleichberechtigter und -bezahlter Wissenschaftler.</li>
</ul>
<p class="MsoNormal"><strong>Ergo:</strong> Weniger häufiger Peer-Review, mehr Eingangstests, mehr Sozialisierung der Wissenschaftler <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> , mehr Autonomie<span> </span>und eine Zerschlagung der DFG in kleine autonome aber nicht in<span> </span>einzelne Forschungsgebiete getrennte Gesellschaften <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> </p>
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		<item>
		<title>Networking for Researchers: Scholarz.net</title>
		<link>http://blog.ahzf.de/index.php/2008/10/02/networking-for-researchers-scholarznet/</link>
		<comments>http://blog.ahzf.de/index.php/2008/10/02/networking-for-researchers-scholarznet/#comments</comments>
		<pubDate>Thu, 02 Oct 2008 12:44:33 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Research]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=398</guid>
		<description><![CDATA[Yes, the research buisness can be a really strange milieu  
Good to see that some old colleagues try to change this situation by creating some mixture of a social network for researchers, source/bibtex management and knowledge management. It&#8217;s called Scholarz (their blog) and is a spin-off of the project &#8220;Scientific Work in the Web 2.0&#8243; [...]]]></description>
			<content:encoded><![CDATA[<p>Yes, the research buisness can be a really strange milieu <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> </p>
<p>Good to see that some old <a href="http://scholarz.net/community_profile/show_profile/1" target="_blank">colleagues</a> try to change this situation by creating some mixture of a social network for researchers, source/bibtex management and knowledge management. It&#8217;s called <a href="http://scholarz.net" target="_blank">Scholarz</a> (their <a href="http://blog.scholarz.net/" target="_blank">blog</a>) and is a spin-off of the project <a href="http://www.quotebook.vwl.uni-wuerzburg.de/" target="_blank">&#8220;Scientific Work in the Web 2.0&#8243;</a> located at the <a href="http://uni-wuerzburg.de/" target="_blank">University of Wuerzburg</a>.</p>
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		<item>
		<title>Simple Software Radio Peripheral</title>
		<link>http://blog.ahzf.de/index.php/2008/09/29/simple-software-radio-peripheral/</link>
		<comments>http://blog.ahzf.de/index.php/2008/09/29/simple-software-radio-peripheral/#comments</comments>
		<pubDate>Mon, 29 Sep 2008 15:54:44 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Software Defined Radio]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=394</guid>
		<description><![CDATA[If the Universal Software Radio Peripheral (USRP) or USRP2 is too expensive you can give the Simple Software Radio Peripheral (SSRP) a try. The primary goal of the SSRP project is to create a low-budget but still modular hardware platform for software design radio purposes (RF signal processing).
Just like the USRP1 the SSRP has a [...]]]></description>
			<content:encoded><![CDATA[<p>If the <a href="http://www.ettus.com/" target="_blank">Universal Software Radio Peripheral (USRP) or USRP2</a> is too expensive you can give the <a href="http://oscar.dcarr.org/ssrp/" target="_blank">Simple Software Radio Peripheral (SSRP)</a> a try. The primary goal of the SSRP project is to create a low-budget but still modular hardware platform for software design radio purposes (RF signal processing).</p>
<p>Just like the USRP1 the SSRP has a <a href="http://oscar.dcarr.org/ssrp/hardware/usb/usb.php" target="_blank">USB 2.0 interface board</a> along with multiple daugtherboards. Until now there exist a hardware design for a simple <a href="http://oscar.dcarr.org/ssrp/hardware/LTC1746/LTC1746.php" target="_blank">ADC</a> and <a href="http://oscar.dcarr.org/ssrp/hardware/MAX5190/MAX5190.php" target="_blank">DAC</a>.</p>
<p><a href="http://blog.ahzf.de/wp-content/uploads/2008/09/ssrp-usbinterfaceboard.jpg"><img class="aligncenter size-medium wp-image-395" title="ssrp-usbinterfaceboard" src="http://blog.ahzf.de/wp-content/uploads/2008/09/ssrp-usbinterfaceboard-300x163.jpg" alt="" width="300" height="163" /></a></p>
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		<item>
		<title>USRP2(beta) released</title>
		<link>http://blog.ahzf.de/index.php/2008/09/20/usrp2beta-released/</link>
		<comments>http://blog.ahzf.de/index.php/2008/09/20/usrp2beta-released/#comments</comments>
		<pubDate>Sat, 20 Sep 2008 22:00:44 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Software Defined Radio]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=381</guid>
		<description><![CDATA[Some days ago Matt Ettus released the new USRP2 board. It&#8217;s the successor of the famous URSP/GNURadio hardware. Some of the USRP2-features:

Gigabit ethernet interface replacing the former USB2 interface
The larger FPGA (Xilinx Spartan 3-2000) containing a 32-bit RISC processor now allows you to do most processing directly within the FPGA
SD-Card for storing configuration, firmware and [...]]]></description>
			<content:encoded><![CDATA[<p>Some days ago <a href="http://flickr.com/photos/35034359904@N01/139347212/" target="_blank">Matt Ettus</a> released the new <a href="http://www.ettus.com/downloads/ettus_ds_usrp2_v2.pdf" target="_blank">USRP2 board</a>. It&#8217;s the successor of the famous URSP/<a href="http://www.gnuradio.org" target="_blank">GNURadio</a> hardware. Some of the USRP2-features:</p>
<ul>
<li>Gigabit ethernet interface replacing the former USB2 interface</li>
<li>The larger FPGA (Xilinx Spartan 3-2000) containing a 32-bit RISC processor now allows you to do most processing directly within the FPGA</li>
<li>SD-Card for storing configuration, firmware and data making the USRP2 a standalone hardware</li>
<li>50(25) MHz RF-bandwith processing in and out or 100 MHz unidirectional</li>
<li>Expansionport for MIMO-applications with 2 MBit/s</li>
<li>Two 100 MegaSampels/s 14-bit analog to digital converters</li>
<li>Two 400 MegaSampels/s 16-bit digital to analog converters</li>
<li>Compatibility to all USRP1 daugtherboards but only one transceiver or tranmitter-/receiver-bundle :-/</li>
</ul>
<p>Unfortuantely the price has nearly doubled (now $1400) and may even increase in the future :-/</p>
<p>For more infos see the USRP2 release notes on <a href="http://sdrblog.wordpress.com/2008/09/13/usrp2-announce/" target="_blank">SDR-blog</a>.</p>
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		<item>
		<title>Software defined GSM-Station</title>
		<link>http://blog.ahzf.de/index.php/2008/09/04/software-defined-gsm-station/</link>
		<comments>http://blog.ahzf.de/index.php/2008/09/04/software-defined-gsm-station/#comments</comments>
		<pubDate>Thu, 04 Sep 2008 17:35:05 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Software Defined Radio]]></category>
		<category><![CDATA[Wireless]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=355</guid>
		<description><![CDATA[
After the prove-of-concept of an software defined DVB-T Transmitter there is a new project concentrating on the development of an GSM basestation   It&#8217;s called OpenBTS and again based on the the GNURadio / URSP hard- and software in combination with asterisk an open source PBX telephony platform. Background information on this project can [...]]]></description>
			<content:encoded><![CDATA[<p><a href="http://blog.ahzf.de/wp-content/uploads/2008/09/openbts.png"><img class="aligncenter size-medium wp-image-363" title="openbts" src="http://blog.ahzf.de/wp-content/uploads/2008/09/openbts.png" alt="" width="240" height="160" /></a></p>
<p>After the prove-of-concept of an <a href="http://blog.ahzf.de/index.php/2008/07/30/software-defined-dvb-t-transmitter/" target="_blank">software defined DVB-T Transmitter</a> there is a new project concentrating on the development of an <a href="http://openbts.sourceforge.net/" target="_blank">GSM basestation</a> <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' />  It&#8217;s called <a href="http://openbts.sourceforge.net/" target="_blank">OpenBTS</a> and again based on the the <a href="http://www.gnuradio.org/" target="_blank">GNURadio</a> / URSP hard- and software in combination with <a href="http://www.asterisk.org/">asterisk</a> an open source PBX telephony platform. Background information on this project can be found <a href="http://openbts.sourceforge.net/background.html" target="_blank">here</a> and <a href="http://openbts.cvs.sourceforge.net/*checkout*/openbts/OpenBTS/doc/OpenBTSProject.pdf" target="_blank">here</a> (<a href="http://www.ahzf.de/itstuff/papers/OpenBTSProject.pdf" target="_blank">local copy</a>).</p>
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		<title>Speeding up next-generation networking</title>
		<link>http://blog.ahzf.de/index.php/2008/08/30/speeding-up-next-generation-networking/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/30/speeding-up-next-generation-networking/#comments</comments>
		<pubDate>Sat, 30 Aug 2008 14:54:38 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Future Internet]]></category>
		<category><![CDATA[Scalabilty]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=309</guid>
		<description><![CDATA[An interessting talk (local copy) from Van Jacobson and Bob Felderman from the Linux.conf.au 2006 about the history and future of implementing networking stacks:

“The way we’ve always done it is not necessarily the same as the right way to do it”
The background is that the networking stacks we know today were initially created for MULTICS [...]]]></description>
			<content:encoded><![CDATA[<p>An interessting <a href="http://www.lemis.com/grog/Documentation/vj/lca06vj.pdf" target="_blank">talk</a> (<a href="http://www.ahzf.de/itstuff/papers/lca06vj.pdf" target="_blank">local copy</a>) from <a href="http://en.wikipedia.org/wiki/Van_Jacobson" target="_blank">Van Jacobson</a> and Bob Felderman from the <a href="http://linux.conf.au/" target="_blank">Linux.conf.au 2006</a> about the history and future of implementing networking stacks:</p>
<p><a href="http://www.lemis.com/grog/Documentation/vj/lca06vj.pdf"><img class="aligncenter size-medium wp-image-312" title="vanjacobson001" src="http://blog.ahzf.de/wp-content/uploads/2008/08/vanjacobson001-300x224.jpg" alt="" width="300" height="224" /></a></p>
<p><strong><em>“The way we’ve always done it is not necessarily the same as the right way to do it”</em></strong></p>
<p>The background is that the networking stacks we know today were <span>initially </span>created for MULTICS machines and had to had the well-known in-kernel design (<em>networking card -&gt; Interrupt service routine -&gt; soft interrupt -&gt; socket interface -&gt; user space read()</em>) because of the very slow paging mechanisms of MULTICS. This would not matter, if all computers would be singlecore machines. But on a multicore machines all the protocol work should be moved to the processor core that’s going to handle the data.</p>
<p><a href="http://blog.ahzf.de/wp-content/uploads/2008/08/vanjacobson002.jpg"><img class="aligncenter size-medium wp-image-317" title="vanjacobson002" src="http://blog.ahzf.de/wp-content/uploads/2008/08/vanjacobson002-300x200.jpg" alt="" width="300" height="200" /></a></p>
<p>As a result a linear scalability on multicore systems can be achieved and everything gets a lot faster (about 6 times). Within the <a href="http://www.lemis.com/grog/Documentation/vj/lca06vj.pdf" target="_blank">slides</a> there are some measurements done by <a href="http://en.wikipedia.org/wiki/Van_Jacobson" target="_blank">Van Jacobson</a> on a patched linux machine supporting the benefits of this networking design.</p>
<p>But there is also some critisism from <a href="http://lwn.net/" target="_blank">LWN</a> <a href="http://lwn.net/Articles/192767/" target="_blank">here</a> and <a href="http://lwn.net/Articles/192772/" target="_blank">here</a> on this networking approach. Especially this detail might be of interest:</p>
<blockquote>
<pre>In traditional approach you also fetch all the headers on softirq,
but you do all the required work with them immediately and do not access
them when the rest of processing is done in process context. I do not
see how netchannels (without hardware classification) can improve
something here. At the first sight it makes locality worse. [...]
It is an amazing toy. But I see nothing, which could promote its status
to practical. Exokernels used to do this thing for ages, and all the
performance gains are compensated by overcomplicated classification
engine, which has to remain in kernel and essentially to do the same
work which routing/firewalling/socket hash tables do.</pre>
</blockquote>
<p>So more research might be neccessary to implement Van Jacobsons idea and make it a success.</p>
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		<item>
		<title>The End of RDBMS/SQL as “One Size Fits All”-technology?</title>
		<link>http://blog.ahzf.de/index.php/2008/08/27/the-end-of-rdbmssql-as-%e2%80%9cone-size-fits-all%e2%80%9d-technology/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/27/the-end-of-rdbmssql-as-%e2%80%9cone-size-fits-all%e2%80%9d-technology/#comments</comments>
		<pubDate>Wed, 27 Aug 2008 14:57:58 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Search Technologies]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=295</guid>
		<description><![CDATA[There are two interesting papers:

“One Size Fits All”: An Idea Whose Time Has Come and Gone (local copy)
 The End of an Architectural Era (It’s Time for a Complete Rewrite) (local copy)

Both papers try to argue that it&#8217;s time to break with the mostly religious belief, that traditional Relational-DBMS
architectures &#8211; once designed for business data [...]]]></description>
			<content:encoded><![CDATA[<p>There are two interesting papers:</p>
<ul>
<li><a href="http://www.cs.brown.edu/~ugur/fits_all.pdf" target="_blank">“One Size Fits All”: An Idea Whose Time Has Come and Gone</a> (<a href="http://www.ahzf.de/itstuff/papers/fits_all.pdf" target="_blank">local copy</a>)</li>
<li> <a href="http://www.mit.edu/~dna/vldb07hstore.pdf" target="_blank">The End of an Architectural Era (It’s Time for a Complete Rewrite)</a> (<a href="http://www.ahzf.de/itstuff/papers/vldb07hstore.pdf" target="_blank">local copy</a>)</li>
</ul>
<p>Both papers try to argue that it&#8217;s time to break with the mostly religious belief, that traditional Relational-<a href="http://en.wikipedia.org/wiki/Database_management_system" target="_blank">DBMS</a><br />
architectures &#8211; once designed for business data processing &#8211; are the still the <em>&#8220;eierlegendewollmilchsau&#8221;</em> for every requirement today.</p>
<p>By giving examples of stream-processing and the datawarehouseing market the show that domain-specific database engines can outperforme classical approaches by 1-2 orders of magnitude.</p>
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		<item>
		<title>eBook on Software-Defined Radios</title>
		<link>http://blog.ahzf.de/index.php/2008/08/22/ebook-on-software-defined-radios/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/22/ebook-on-software-defined-radios/#comments</comments>
		<pubDate>Fri, 22 Aug 2008 13:27:37 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Security]]></category>
		<category><![CDATA[Software Defined Radio]]></category>
		<category><![CDATA[Wireless]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=235</guid>
		<description><![CDATA[William A. Sethares and Rick Johnson wrote an interesting book on a more and more hot topic in wireless technology but also security research:

Telecommunication Breakdown: Concepts of Communication Transmitted via Software-Defined Radio
There is also a PDF-version of this book available.
An brief introduction on Software-Defined Radios can be found in Michael Ossmann&#8217;s Black Hat 2008 talk [...]]]></description>
			<content:encoded><![CDATA[<p><a href="http://eceserv0.ece.wisc.edu/~sethares/" target="_blank">William A. Sethares</a> and Rick Johnson wrote an interesting book on a more and more hot topic in wireless technology but also security research:</p>
<p><a href="http://eceserv0.ece.wisc.edu/~sethares/telebreak.html"><img class="aligncenter size-medium wp-image-236" title="sdrbook" src="http://blog.ahzf.de/wp-content/uploads/2008/08/sdrbook-242x300.jpg" alt="" width="242" height="300" /></a></p>
<p><a href="http://eceserv0.ece.wisc.edu/~sethares/telebreak.html" target="_blank">Telecommunication Breakdown: Concepts of Communication Transmitted via Software-Defined Radio</a></p>
<p>There is also a <a href="http://homepages.cae.wisc.edu/~sethares/telebreak.pdf" target="_blank">PDF-version</a> of this book available.</p>
<p>An brief introduction on Software-Defined Radios can be found in Michael Ossmann&#8217;s <a href="http://www.blackhat.com/" target="_blank">Black Hat 2008</a> <a href="http://www.blackhat.com/html/bh-usa-08/bh-usa-08-speakers.html#Ossmann" target="_blank">talk</a> &#8220;<a href="http://www.blackhat.com/presentations/bh-usa-08/BH_US_08_Ossmann_Software_Radio.pdf" target="_blank">Software Radio and the Future of Wireless Security</a>&#8221; (<a href="http://www.ahzf.de/itstuff/conferences/BH_US_08_Ossmann_Software_Radio.pdf" target="_blank">local copy</a>).</p>
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		<item>
		<title>Fourier&#8217;s Song &#8211; Properties of the Fourier Transform</title>
		<link>http://blog.ahzf.de/index.php/2008/08/22/fouriers-song-properties-of-the-fourier-transform/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/22/fouriers-song-properties-of-the-fourier-transform/#comments</comments>
		<pubDate>Fri, 22 Aug 2008 13:06:02 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Software Defined Radio]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=233</guid>
		<description><![CDATA[This song as MP3 (local copy):
Properties of the Fourier Transform
(or, Fourier&#8217;s Song)
Integrate your function times a complex exponential
It&#8217;s really not so hard you can do it with your pencil
And when you&#8217;re done with this calculation
You&#8217;ve got a brand new function &#8211; the Fourier Transformation
What a prism does to sunlight, what the ear does to sound
Fourier [...]]]></description>
			<content:encoded><![CDATA[<p>This song as <a href="http://eceserv0.ece.wisc.edu/~sethares/mp3s/Fouriers_Song.mp3" target="_blank">MP3</a> (<a href="http://www.ahzf.de/itstuff/papers/Fouriers_Song.mp3" target="_blank">local copy</a>):</p>
<p><span style="font-size: medium;"><strong>Properties of the Fourier Transform<br />
(or, Fourier&#8217;s Song)</strong></span></p>
<p><span style="font-size: medium;">Integrate your function times a complex exponential<br />
It&#8217;s really not so hard you can do it with your pencil<br />
And when you&#8217;re done with this calculation<br />
You&#8217;ve got a brand new function &#8211; the Fourier Transformation<br />
What a prism does to sunlight, what the ear does to sound<br />
Fourier does to signals, it&#8217;s the coolest trick around<br />
Now filtering is easy, you don&#8217;t need to convolve<br />
All you do is multiply in order to solve.</span></p>
<p><span style="font-size: medium;">From time into frequency &#8211; from frequency to time</span></p>
<p><span style="font-size: medium;">Every operation in the time domain<br />
Has a Fourier analog &#8211; that&#8217;s what I claim<br />
Think of a delay, a simple shift in time<br />
It becomes a phase rotation &#8211; now that&#8217;s truly sublime!<br />
And to differentiate, here&#8217;s a simple trick<br />
Just multiply by J omega, ain&#8217;t that slick?<br />
Integration is the inverse, what you gonna do?<br />
Divide instead of multiply &#8211; you can do it too.</span></p>
<p><span style="font-size: medium;">From time into frequency &#8211; from frequency to time</span></p>
<p><span style="font-size: medium;">Let&#8217;s do some examples&#8230; consider a sine<br />
It&#8217;s mapped to a delta, in frequency &#8211; not time<br />
Now take that same delta as a function of time<br />
Mapped into frequency &#8211; of course &#8211; it&#8217;s a sine!</span></p>
<p><span style="font-size: medium;">Sine x on x is handy, let&#8217;s call it a sinc.<br />
Its Fourier Transform is simpler than you think.<br />
You get a pulse that&#8217;s shaped just like a top hat&#8230;<br />
Squeeze the pulse thin, and the sinc grows fat.<br />
Or make the pulse wide, and the sinc grows dense,<br />
The uncertainty principle is just common sense.</span></p>
<p>(via: <a href="http://eceserv0.ece.wisc.edu/~sethares/mp3s/fourier.html" target="_blank">http://eceserv0.ece.wisc.edu/~sethares/mp3s/fourier.html</a>)</p>
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		<slash:comments>1</slash:comments>
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		</item>
		<item>
		<title>The history of the NSF-/ARPA-/INTERNET</title>
		<link>http://blog.ahzf.de/index.php/2008/08/19/the-history-of-the-nsf-arpa-internet/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/19/the-history-of-the-nsf-arpa-internet/#comments</comments>
		<pubDate>Tue, 19 Aug 2008 00:21:45 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Future Internet]]></category>
		<category><![CDATA[The old Internet]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=134</guid>
		<description><![CDATA[The National Science Foundation has created great and very interessting site on the history of the NSF-/ARPA-/INTERNET.

&#8220;The challenges and and possibilities are out there, waiting for the next group of dreamers to change the world once again.&#8221;
]]></description>
			<content:encoded><![CDATA[<p>The <a href="http://www.nsf.gov" target="_blank">National Science Foundation</a> has created great and very interessting site on the history of the <a href="http://www.nsf.gov/news/special_reports/nsf-net/" target="_blank">NSF-/ARPA-/INTERNET</a>.</p>
<p><a href="http://blog.ahzf.de/wp-content/uploads/2008/08/nsf-net.jpg"><img class="aligncenter size-medium wp-image-135" title="nsf-net" src="http://blog.ahzf.de/wp-content/uploads/2008/08/nsf-net-296x300.jpg" alt="" width="296" height="300" /></a></p>
<p>&#8220;The challenges and and possibilities are out there, waiting for the next group of dreamers to change the world once again.&#8221;</p>
]]></content:encoded>
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		<item>
		<title>Internet World Business nominates SONES (Update!)</title>
		<link>http://blog.ahzf.de/index.php/2008/08/15/internet-world-business-nominates-sones-update/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/15/internet-world-business-nominates-sones-update/#comments</comments>
		<pubDate>Fri, 15 Aug 2008 18:54:28 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Filesystems]]></category>
		<category><![CDATA[Future Internet]]></category>
		<category><![CDATA[Graphs]]></category>
		<category><![CDATA[Search Technologies]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=132</guid>
		<description><![CDATA[Your little start-up Sones (located in Erfurt) made it under the first German 20 start-ups  !
I blogged about this election by the INTERNET WORLD Business newspaper some time ago, but now it&#8217;s your chance to support us. Just click on the following link and give us your vote  

Update: The competition is also [...]]]></description>
			<content:encoded><![CDATA[<p>Your little start-up <a href="http://www.sones.de" target="_blank">Sones</a> (located in Erfurt) made it under the first German <a href="http://www.internetworld.de/Business-Idee" target="_blank">20 start-ups</a> <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> !</p>
<p>I blogged about this <a href="http://www.internetworld.de/Business-Idee" target="_blank">election</a> by the <a href="http://www.internetworld.de/" target="_blank">INTERNET WORLD Business newspaper</a> <a href="http://blog.ahzf.de/index.php/2008/07/22/internet-world-business-nominates-sones/" target="_blank">some time ago</a>, but now it&#8217;s your chance to support us. Just click on the following <a href="http://www.internetworld.de/businessidee/sones-gmbh.html" target="_blank">link</a> and give <a href="http://www.schrankmonster.de/PermaLink,guid,dad577e7-7d21-4526-ae3f-ee4291e838e9.aspx" target="_blank">us</a> your vote <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
<p><a href="http://blog.ahzf.de/wp-content/uploads/2008/08/vodeinternet_1.jpg"><img class="aligncenter size-medium wp-image-133" title="vodeinternet_1" src="http://blog.ahzf.de/wp-content/uploads/2008/08/vodeinternet_1.jpg" alt="" width="204" height="167" /></a></p>
<p>Update: The competition is also mentioned on the <a href="http://www.biz-awards.de/gruender/nachrichten/914/der-user-entscheidet-welche-idee-das-internet-rockt.htm" target="_blank">Biz-Award-Website</a> and the <a href="http://inside.gruenderszene.de/2008/08/19/grunder-wettbewerb-wahle-deinen-favoriten/" target="_blank">Gründerzene-Blog</a>.<a href="http://dict.leo.org/ende?lp=ende&amp;p=thMx..&amp;search=competition"></a></p>
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		<item>
		<title>Large Hadron Rap</title>
		<link>http://blog.ahzf.de/index.php/2008/08/12/large-hadron-rap/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/12/large-hadron-rap/#comments</comments>
		<pubDate>Tue, 12 Aug 2008 11:52:47 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Research]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=129</guid>
		<description><![CDATA[The CERN is rapping the Large Hadron Rap:

(via ZEIT)
]]></description>
			<content:encoded><![CDATA[<p>The CERN is rapping the <em><strong>Large Hadron Rap</strong></em>:</p>
<p><a href="http://blog.zeit.de/weisslog/?p=283" target="_blank"><object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="425" height="344" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0"><param name="wmode" value="transparent" /><param name="allowFullScreen" value="true" /><param name="src" value="http://www.youtube.com/v/j50ZssEojtM&amp;color1=11645361&amp;color2=13619151&amp;hl=en&amp;fs=1" /><embed type="application/x-shockwave-flash" width="425" height="344" src="http://www.youtube.com/v/j50ZssEojtM&amp;color1=11645361&amp;color2=13619151&amp;hl=en&amp;fs=1" allowfullscreen="true" wmode="transparent"></embed></object></a></p>
<p>(via <a href="http://blog.zeit.de/weisslog/?p=283" target="_blank">ZEIT</a>)</p>
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		<item>
		<title>The only real problem is scaling&#8230;</title>
		<link>http://blog.ahzf.de/index.php/2008/08/12/the-only-real-problem-is-scaling/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/12/the-only-real-problem-is-scaling/#comments</comments>
		<pubDate>Tue, 12 Aug 2008 09:58:21 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Research]]></category>
		<category><![CDATA[Scalabilty]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=128</guid>
		<description><![CDATA[&#8220;The only real problem is scaling. All others inherent are from that one.
If you can scale, everything else must be working.&#8221;
MPLS Conference (Nov. 1998) &#8211; Mike O&#8217;Dell, Chief Scientist, UUNet

.
If you are interessed in background information on high-scalabilty web solutions and you are not a religious IBM-, HP-, $wahteverbigcompany-believer highscalability.com might be worth reading for [...]]]></description>
			<content:encoded><![CDATA[<p><strong>&#8220;The only real problem is scaling. All others inherent are from that one.</strong></p>
<p><strong>If you can scale, everything else must be working.&#8221;</strong></p>
<p><em>MPLS Conference (Nov. 1998) &#8211; Mike O&#8217;Dell, Chief Scientist, UUNet<br />
</em></p>
<p>.</p>
<p>If you are interessed in background information on high-scalabilty web solutions and you are not a religious IBM-, HP-, $wahteverbigcompany-believer <a href=" http://highscalability.com" target="_blank">highscalability.com</a> might be worth reading for you.</p>
<p>There are some interessting articels on the technology behind big internet services like <a href="http://highscalability.com/youtube-architecture" target="_blank">YouTube</a>, <a href="http://highscalability.com/flickr-architecture" target="_blank">Flickr</a>, <a href="http://highscalability.com/google-architecture" target="_blank">Google</a>, <a href="http://highscalability.com/amazon-architecture" target="_blank">Amazon</a>, <a href="http://highscalability.com/scaling-twitter-making-twitter-10000-percent-faster" target="_blank">Twitter</a>,  and many more&#8230;</p>
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		<item>
		<title>How to visualize your software repository?</title>
		<link>http://blog.ahzf.de/index.php/2008/08/09/how-to-visualize-your-software-repository/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/09/how-to-visualize-your-software-repository/#comments</comments>
		<pubDate>Sat, 09 Aug 2008 22:19:27 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[OpenSource]]></category>
		<category><![CDATA[Research]]></category>
		<category><![CDATA[Visualization]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=125</guid>
		<description><![CDATA[Michael Ogawa created a small application visualizing the activity of a software repository over the time&#8230; very impressive!

]]></description>
			<content:encoded><![CDATA[<p><a href="http://vis.cs.ucdavis.edu/~ogawa/codeswarm/" target="_blank">Michael Ogawa</a> created a small <a href="http://code.google.com/p/codeswarm" target="_blank">application</a> visualizing the activity of a software repository over the time&#8230; very impressive!</p>
<p><a href="http://blog.ahzf.de/wp-content/uploads/2008/08/eclipse-640px.png"><img class="alignnone size-medium wp-image-126" title="eclipse-640px" src="http://blog.ahzf.de/wp-content/uploads/2008/08/eclipse-640px-300x225.png" alt="" width="300" height="225" /></a></p>
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		<item>
		<title>The CAIDA internet</title>
		<link>http://blog.ahzf.de/index.php/2008/08/09/the-caida-internet/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/09/the-caida-internet/#comments</comments>
		<pubDate>Sat, 09 Aug 2008 20:41:45 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Future Internet]]></category>
		<category><![CDATA[Research]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=122</guid>
		<description><![CDATA[CAIDA, the Cooperative Association for Internet Data Analysis, provides tools and analyses promoting the engineering and maintenance of a robust, scalable global Internet infrastructure. And sometimes they also hire an art student for an internship:

The Internet, an undergrad project by UCSD graphic art student Jennifer Hsu.
(via: blog.caida.org)
]]></description>
			<content:encoded><![CDATA[<p>CAIDA, the <a href="http://www.caida.org" target="_blank">Cooperative Association for Internet Data Analysis</a>, provides tools and analyses promoting the engineering and maintenance of a robust, scalable global Internet infrastructure. And sometimes they also hire an art student for an internship:</p>
<p><object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="425" height="344" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0"><param name="allowFullScreen" value="true" /><param name="src" value="http://www.youtube.com/v/dPaCdXK27Fw&amp;hl=en&amp;fs=1" /><embed type="application/x-shockwave-flash" width="425" height="344" src="http://www.youtube.com/v/dPaCdXK27Fw&amp;hl=en&amp;fs=1" allowfullscreen="true"></embed></object></p>
<p>The Internet, an undergrad project by UCSD graphic art student Jennifer Hsu.</p>
<p>(via: <a href="http://blog.caida.org/best_available_data/2008/08/04/netmashup/" target="_blank">blog.caida.org</a>)</p>
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		<item>
		<title>Practical File System Design</title>
		<link>http://blog.ahzf.de/index.php/2008/08/04/practical-file-system-design/</link>
		<comments>http://blog.ahzf.de/index.php/2008/08/04/practical-file-system-design/#comments</comments>
		<pubDate>Mon, 04 Aug 2008 16:14:58 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Filesystems]]></category>
		<category><![CDATA[Research]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=118</guid>
		<description><![CDATA[
If you are interessed in background information on filesystems and how to implement them, there is a really nice e-book: Practical File System Design by Dominic Giampaolo. The target audience may be more technical people, but he writes very straightforward so even if you only have basic computational survival skills it might be worth reading.
]]></description>
			<content:encoded><![CDATA[<p><a href="http://blog.ahzf.de/wp-content/uploads/2008/08/practicalfilesystemdesign.jpg"><img class="alignnone size-medium wp-image-119" title="practicalfilesystemdesign" src="http://blog.ahzf.de/wp-content/uploads/2008/08/practicalfilesystemdesign.jpg" alt="" width="300" height="300" /></a></p>
<p>If you are interessed in background information on filesystems and how to implement them, there is a really nice e-book: <a href="http://www.nobius.org/~dbg/practical-file-system-design.pdf" target="_blank">Practical File System Design</a> by Dominic Giampaolo. The target audience may be more technical people, but he writes very straightforward so even if you only have basic computational survival skills it might be worth reading.</p>
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		<item>
		<title>Software defined DVB-T transmitter</title>
		<link>http://blog.ahzf.de/index.php/2008/07/30/software-defined-dvb-t-transmitter/</link>
		<comments>http://blog.ahzf.de/index.php/2008/07/30/software-defined-dvb-t-transmitter/#comments</comments>
		<pubDate>Wed, 30 Jul 2008 12:45:53 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[DVB-T]]></category>
		<category><![CDATA[Research]]></category>
		<category><![CDATA[Software Defined Radio]]></category>
		<category><![CDATA[Wireless]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=113</guid>
		<description><![CDATA[
.
Harald recently blogged about a full-featured DVB-T transmitter using a normal PC and the GNURadio / URSP hard- and software. There is also a paper on this topic &#8220;Soft-DVB: A Fully-Software GNURadio-based ETSI DVB-T Modulator&#8221; by Vincenzo Pellegrini,  Giacomo Bacci and Marco Luise presented at the WSR&#8217;08 and a additional paper on wireless protocol [...]]]></description>
			<content:encoded><![CDATA[<div class="story"><a href="http://blog.ahzf.de/wp-content/uploads/2008/08/gnuradio12.png"><img class="aligncenter size-full wp-image-248" title="gnuradio12" src="http://blog.ahzf.de/wp-content/uploads/2008/08/gnuradio12.png" alt="" width="175" height="82" /></a></div>
<div class="story">.</div>
<div class="story"><a href="http://laforge.gnumonks.org/weblog/" target="_blank">Harald</a> recently blogged about a full-featured DVB-T transmitter using a normal PC and the <a href="http://www.gnuradio.org" target="_blank">GNURadio</a> / URSP hard- and software. There is also a paper on this topic &#8220;<a href="http://wwvince.interfree.it/PellegriniBacciLuise_WSR08_CR.pdf" target="_blank">Soft-DVB: A Fully-Software GNURadio-based ETSI DVB-T Modulator</a>&#8221; by Vincenzo Pellegrini,  Giacomo Bacci and Marco Luise presented at the <a href="http://www-int.etec.uni-karlsruhe.de/seiten/conferences/wsr08/" target="_blank">WSR&#8217;08</a> and a additional paper on wireless <a href="http://staff.science.uva.nl/~delaat/sne-2007-2008/p37/report.pdf" target="_blank">protocol analysis</a>.</div>
<div class="story">.</div>
<div class="story">So what to do with the plannings of our own <a href="http://www.fem-dvb-t.de" target="_blank">FeM-DVB-T</a> stadion?</div>
<div class="story">Switch over to an SDR-approach?</div>
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		<item>
		<title>JUNG 2.0beta1 finally released</title>
		<link>http://blog.ahzf.de/index.php/2008/07/26/jung-20beta1-finally-released/</link>
		<comments>http://blog.ahzf.de/index.php/2008/07/26/jung-20beta1-finally-released/#comments</comments>
		<pubDate>Sat, 26 Jul 2008 21:33:57 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Graphs]]></category>
		<category><![CDATA[OpenSource]]></category>
		<category><![CDATA[Visualization]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=109</guid>
		<description><![CDATA[After really a long looong time JUNG 2.0beta1 was finally released  
With JUNG &#8211; the Java Universal Network/Graph Framework &#8211; you can do a lot of great things around modeling, analysis, and visualization of data that can be represented as a graph or network. For me especially the visualization and graph layout methods had [...]]]></description>
			<content:encoded><![CDATA[<p>After really a long looong time <a href="http://jung.sourceforge.net/" target="_blank">JUNG 2.0beta1</a> was finally <a href="https://sourceforge.net/forum/message.php?msg_id=5122647" target="_blank">released</a> <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
<p>With JUNG &#8211; the <a href="http://jung.sourceforge.net/" target="_blank">Java Universal Network/Graph Framework</a> &#8211; you can do a lot of great things around modeling, analysis, and visualization of data that can be represented as a graph or network. For me especially the visualization and graph layout methods had been a great pleasure during my diploma thesis. Hopefully the (new implemented) analysis and clustering algorithms will also enthuse me during the next months (or years <img src='http://blog.ahzf.de/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' />  ) of work, research, leisure, whatever&#8230;</p>
<p>For the interessed: A communiy of 736 nodes as part of the much larger <a href="http://www.caida.org" target="_blank">CAIDA internet topology</a> and a path between two nodes. All this was done with methods from the JUNG framework as a part of my diploma thesis.</p>
<p><a href="http://blog.ahzf.de/wp-content/uploads/2008/07/community736.jpg"><img class="alignnone size-medium wp-image-110" title="community736" src="http://blog.ahzf.de/wp-content/uploads/2008/07/community736-300x258.jpg" alt="" width="300" height="258" /></a></p>
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		<item>
		<title>Internet World Business nominates SONES</title>
		<link>http://blog.ahzf.de/index.php/2008/07/22/internet-world-business-nominates-sones/</link>
		<comments>http://blog.ahzf.de/index.php/2008/07/22/internet-world-business-nominates-sones/#comments</comments>
		<pubDate>Tue, 22 Jul 2008 12:35:21 +0000</pubDate>
		<dc:creator>ahzf</dc:creator>
				<category><![CDATA[Filesystems]]></category>
		<category><![CDATA[Future Internet]]></category>
		<category><![CDATA[Research]]></category>
		<category><![CDATA[Search Technologies]]></category>
		<category><![CDATA[Graphs]]></category>
		<category><![CDATA[SONES]]></category>

		<guid isPermaLink="false">http://blog.ahzf.de/?p=107</guid>
		<description><![CDATA[For the last months I&#8217;m working for a small start-up called &#8220;SONES GmbH&#8221; located in Erfurt Germany.  The goals of the company is to develop new search technologies respecting the fact that the normal SQL-based way of storing information within fixed tables is not the best solution for a large bunch of new applications [...]]]></description>
			<content:encoded><![CDATA[<p>For the last months I&#8217;m working for a small start-up called <a href="http://www.sones.de" target="_blank">&#8220;SONES GmbH&#8221;</a> located in Erfurt Germany.  The goals of the company is to develop new search technologies respecting the fact that the normal SQL-based way of storing information within fixed tables is not the best solution for a large bunch of new applications like social networks and other areas where the combination or the context of information is more important the (naked) information as it is. If your interessed in some background information related to this topic just read the following publications: <a href="http://labs.google.com/papers/bigtable.html" target="_blank">Google BigTable</a>, <a href="http://code.google.com/p/the-cassandra-project/" target="_blank">FaceBook Cassandra</a></p>
<p>As a real technology company SONES will not only design and implement new concepts for searching, but also new concepts for storing these information in application specific <a href="http://en.wikipedia.org/wiki/Distributed_File_System" target="_blank">distributed filesystems</a> (e.g. <a href="http://labs.google.com/papers/gfs.html" target="_blank">GoogleFS</a>) using latest ideas related to <a href="http://cordis.europa.eu/fp7/ict/fire/" target="_blank">Future Internet designs</a>.</p>
<p>Today, while I&#8217;m visting the <a href="http://www3.informatik.uni-wuerzburg.de/ITG/2008/" target="_blank">EuroView Workshop</a> in Würzburg (Germany), we were noticed that the <a href="http://www.internetworld.de/" target="_blank">INTERNET WORLD Business</a> newspaper has <a href="http://www.internetworld.de/home/news-single/article/internet-world-business-sucht-die-beste-business-idee-des-jahres-7951.html" target="_blank">nominated</a> SONES as one of the most important (german) start-ups. As a reader of this newspaper you can vote for SONES till  30. September 2008. The winners of the contest will receive an Onlinestar during the <a href="http://www.internetworld-messe.de/" target="_blank">INTERNET WORLD Congress</a> in Munich in October.</p>
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