Wednesday, October 23, 2013

Ausfahrt A5 zum L3004 bei Frankfurt

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Sehr geehrte Damen und Herren,

warum gibt es kein Ausfahrt/Einfahrt bei der Kreuzung A5 und L3004? Ist es geplant? Meine Meinung nach, es ist offensichtlich nötig.


Sehr geehrter Herr ...,

Sie hatten sich mit einer Anfrage an das Straßenverkehrsamt gewandt, deren Beantwortung innerhalb der Stadt Frankfurt a.M. in unseren Zuständigkeitsbereich fällt.

Beim Blick auf den Stadtplan mag der Gedanke, die A5 mit der L 3004 zu verknüpfen, sinnvoll erscheinen. Aus der Untersuchung ähnlicher Fragestellungen ist aber bekannt, dass ein solcher Anschluss so attraktiv wäre, dass die L 3004 sowohl in Richtung Oberursel als auch im Stadtgebiet Frankfurt völlig überlastet würde. Von daher verbietet sich ein unmittelbarer Anschluss des nachgeordneten Netzes an die Fernautobahn A5 im Norden Frankfurts. Die Verteilung des Quell- und Zielverkehrs muss vielmehr indirekt über die Regionalautobahnen A661, A 66 und A 648 und die dortigen Anschlussstellen erfolgen, um überhaupt bewältigt werden zu können.

Die Stadt Frankfurt a.M. wird daher keinen entsprechenden Vorstoß unternehmen. Es bestünde im Übrigen auch keine Aussicht, dass die Autobahnverwaltung einer solchen Verknüpfung zustimmen würde. Darüber hinaus bleibt festzuhalten, dass die Höhenverhältnisse im Urselbachtal zu einem sehr hohen technischen Aufwand für eine Anschlussstelle führen würde.

Freundliche Grüße
Im Auftrag

Jens Wöbbeking
Stadt Frankfurt am Main
– Der Magistrat –
Referat Mobilitäts- und Verkehrsplanung
66A.1 Fachbereichsleiter Gesamtverkehrsplanung

Thoughts about visas in 21st century

We live in a world where nanotechnology and space travel have become common place. Where flights have allowed us to cover huge distances in mere hours. Just think about how long your last flight would have lasted if you were to go on the horse!

Yet we live in a medieval age in regards to countries and borders. Back then each city was building walls around itself in order to protect itself from conquesters. And each country has build national borders in order to protect it's land and citizens. This all made sense at that time. There were enemy armies and it was common to top-up one's treasury by conquering a neighbour country.

A child doesn't choose in which country to be born. A person who happen to be born on one country may want to travel to another. Unrestricted. He could have been born in a different country. Somehow the act of being born at some place or the other enables him to have more or less opportunities in live.

Nations which require a visa seem to be proud of themselves so much that they prevent other people from visiting their country. I can understand being proud. But shouldn't you invite others to share your country's beauty?

A visa requirement is imposing large barriers on applicants and it's kind of preselecting people. One needs to be relatively rich in order to just pay for visa application. One needs to provide a lot of personal information in the application and provide evidence for it. And then the authorities may still choose to reject entrance to their country.

Being born at some place doesn't mean that person himself is good or bad. Shouldn't the passports based on the ethical behavior of the person make more sense than based on the political map?

Imagine an international worldwide passport which identifies a person and a worldwide database of criminal, ethical, environmental and moral offenses. Everyone is trusted to have a good will and allowed to travel the world. But somebody who killed a dog or even another person should remain in the region where he is and not pose a threat to other regions.

Probably it only makes sense to me...

YouTube channel idea: Professions

With the advent of multitude of new educational YouTube channels explaining science in an entertaining way like: numberphile, SciShow, CGPGrey, Veritasium, Numberphile, sixtysymbols and Vsause people are much more likely to get education, get it right so it sticks and keep learning after graduation.

There's one thing missing in our life in general and as a YouTube channel. Teenagers get a very little information about different professions.

In the past carpenters, farmers and kings have raised their offspring teaching their profession to the kids from an early age. Nowadays companies never allow children at their parents' work places. It's even absurd to imagine that. Hence children may not learn from their parents like it was in the past.

And though the teaching role of the parents is lost it's not replaced with anything else. Neither school nor universities give any in-depth information about thousands of different professions. So children are left to make uninformed decisions. All children, all the time. No wonder so many people are unsatisfied with their life! The feeling of being needed, joy of working and appreciation of the work you've done are one of the most motivating and rewarding feelings.

I imagine a YouTube channel where an interviewer and a camera-man are going each week (part-time) or even every day (fulltime) to one new working place suggested and selected by the subscribers. They interview and show(!) the exact daily routine of that person and try to cover all aspects of it in less than 10 minutes of a video footage. The video should be informative, engaging, fun and entertaining in order to gain a large audience.

Awkward and rare professions should be mixed with most common and wanted professions. With time many companies will compete in order to get their employees interviewed as it raises the exposure of the company.

What it's like to be a farmer, farmaceut, pilot or speleologist? I wish I knew that when I was young.

Idea: Android platform for the conference schedule apps

Checking printed schedule is not 21st century. Mobile app with a schedule should allow offline schedule checking, private custom schedule selection, checking the location map. It should be time aware and hide the information which has been in the past during the conference.

The actual data should come from the web-site, cached permanently for the offline mode. A standardized REST API should allow any conference to prepare a schedule information for the app.

The current conference should be selected based on the GPS information.

Make it a little bit intelligent, people.

A central server should contain a list of possible conferences with links to and Organizers unable to provide a REST API should be able to manually create the schedule online in the backend.

Idea: In flight location information

Aircraft can be equipped with a simple WiFi access point (Internet connection is not required) where interested passengers will connect to get a map and a location of the aircraft in real-time. As simulating the GPS inside the aircraft is impossible, the current location should be transferred from the access point by a custom protocol.

So the usage of Google Maps or any other standard app is not possible, but the custom in-flight app should be able to display cached maps from the device.

Additional information such as the current speed, altitude, heading, remaining flight time and others should be available as well.

As more than 50% of the people flying the planes have a mobile device and this number will only increase to 100%, it's possible to spare the display installation inside each seat and provide a more convenient and customized experience for the users. The installation is even more cheap because there are no wires to install and maintain.

Additionally music and videos can be streamed from the access point to each user thus replacing the complete package of the in-flight entertainment.

Possible problems:
- Accessing in-flight computer information needs to be investigated.
- WiFi on board of the plane is sometimes not allowed, what's the rule?

Idea: Electronic Billboard

Let's install many electronic displays instead of the paper billboards at the airports, hotels and other places where it's not easily vandalized. The displays should display ads randomly just like Google Adsense does.

Each device will have a WiFi and 3G connection, will connect to the central server once in a while to update 10-20 advertisement PNG files. This gives small companies an opportunity to become visible even when it's for the short time.

For example: 1 minute display on one device could cost 1 EUR. With a current situation companies need to invest thousands of EUR into long term billboard ads because it's visibility time is measured in days and weeks.


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How to restore the precedent session from a sessionstore.bak file

This is a cross-post from

When I tried to open firefox it automatically updated and supressed the sessionstore.js file. I saved the sessionstore.bak into another folder, closed mozilla, changed the extension bak to js in the "profiles" folder of firefox and opened it again but nothing happened. Though the sessionstore.bak file is 13Ko big and seems to contain all the links of my previous session.

How could I force Firefox to start a session using the information in the sessionstore.bak or .js file as it should?

My Answer

  1. Open a sessionstore.js file in a browser. It can be a different browser (Chrome) if you like.
  2. Open Firebug/Inspector.
  3. Type:
    eval("ss = "+document.body.innerHTML.replace("<pre>", "").replace("</pre>", ""));
  4. Type:
    for (var i = 0; i <[0].tabs.length; i++) { var ent =[0].tabs[i].entries; var last = ent[ent.length-1]; document.write("<a href="+last.url+">"+last.url+"</a><br />"); }
Enjoy all tabs from sessionstore on your screen. You only need to Ctrl-click them one by one.

Addendum: In case you see an error "TypeError:[0] is undefined" you need to try again but replace all references of "" to "ss.closedWindows". This depends on the contents of your sessionstore.bak file.