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Verbruiksstatistiek van onze Volvo 240 Station

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Ik heb een tijdje bijgehouden hoeveel onze auto, een Volvo 240 Station uit 1991, nou eigenlijk verbruikt. Ik heb in deze periode bijna alleen Shell benzine getankt, want onze auto rijdt daar het lekkerst op. Alleen in Duitsland moest ik een ander merk nemen. Duitsland niet meegerekend, heb ik tijdens de tests twee verschillende benzine's getankt, want men zei mij dat dat uit zou maken op het aantal kilometers per liter. De auto is deze tijd in gebruik geweest voor woon/werk, hond uit laten, weekendtrips, etc.. De snelheid was wisselend lager, gelijk of hoger dan de maximaal toegestane. Hieronder volgen de gegevens met grafiek, waarin duidelijk wordt dat het geen reet uitmaakt wat je tankt en wanneer je tankt en hoe je rijdt - het verbruik blijft gelijk.

Tanken-2010-02-19-19-45

De rode getallen onderaan de kolommen zijn gemiddelden van de waarden in de kolom. De kosten per kilometer zijn gebaseerd op de waarde van de volle tank. De waarde van een volle tank bestaat namelijk uit de restwaarde van de nog aanwezige benzine + de nieuwwaarde van de net getankte benzine. Uitgaande van het gemiddelde aantal kilometers wat uit een tank gaat, heb je zo ook steeds een gemiddelde prijs per liter. Daar kan je dan weer de afwijkingen van meten met de werkelijke prijs. Hetzelfde is gedaan met de kosten per kilometer.

De pieken in de grafiek geven respectievelijk 3 en 2 achtereenvolgende tankbeurten weer, waarvan de kilometerstanden tijdens de rit niet bijgehouden zijn. Alleen de kilometerstanden ten tijde van vertrek en de uiteindelijke thuiskomst zijn genoteerd. De gegevens zijn daarom in deze gevallen door 3 resp. 2 gedeeld om weer op een normaal gemiddelde te komen.

Zoals je ziet, verandert het aantal kilometers per liter (oranje balk) praktisch niet. De waarde van een volle tank verandert ook nauwelijks - dit komt natuurlijk omdat de prijzen zo verschrikkelijk fluctueren. Je denkt dure V-Power te tanken terwijl een week later de Euro-Shell duurder is dan de V-Power van toen.
 Comments

Image dimensions in MacJournal

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MacJournal is a great blog and notebook program! However, you cannot see or edit the image's dimensions. You can drag the bottom-right corner when you want to resize an image, but also then there is no feedback regarding the image's dimensions. There is a way, though, to find out what the dimensions are, before you post. Use Art Directors Toolkit ($39.95, upgrade $19.95) or ARTIS Screen Tools ($9.95) rulers. Here is a screenshot of how you can measure an image in MacJournal with Art Director:

Screenshot2010-02-16at16.37.48-2010-02-16-16-40
Here is also a screen shot with ARTIS rulers. Note that Art Director's rulers move as one block - they're connected like on a drawing table. But ARTIS Screen Rulers float independent from one another. So it is what you prefer.

Screenshot2010-02-16at17.15.24-2010-02-16-16-40
Both these rulers always stay on top, and that is what is most important.

I looked at Free Ruler but those rulers are just like a document window - they do not float on top of everything. Then there is Rulers which places two rulers at your screen's top / left borders. They float on top of everything and you measure by placing horizontal and vertical guide lines on the screen. Both are not good for my purpose. For those who need it, ARTIS also offers grids and guides on your screen in the Screen Tools package as separate programs, which are, in my opinion a much nicer solution than Omnidea's Rulers.

Update 13-11-2015: Since then Xscope has emerged. Use that one, it is very good.
 
 Comments

SetEXIFData 2.7

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A new version of SetEXIFData is on-line. You can find it here.
This new version has the possibility of adding/subtracting a fixed amount of time and a minor repair.
 Comments

Web browsers and speed

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Where I work we use a home-made Transport Track & Trace System. I can't publish the page here because it contains company material, but I can say that the output for the people who need a complete overview of all ongoing transports, is a page with lots of tables:

Screenshot2010-02-09at14.02.05-2010-02-9-13-52

and a lot of rows:

Screenshot2010-02-09at14.02.20-2010-02-9-13-52

I used Coda to find out how many '

The transportation data (truck, shipper, consignee, forwarder, etc.) on this page is pulled from a database and the page is generated on the server, all done by a Lasso script and then send to the browser. We had some complaints about loading times, so I did a perceptual stopwatch test with different browsers and Mac OS X and Windows XP. The stopwatch started as I clicked OK on the HTTP-authentication dialog and stopped when the spinning wheel stops. Here they are:

iMac 24" from 2008 with OS X 10.6 on 3.06GHz Intel Core 2 Duo
Safari 4.0.4 : +/- 55 seconds
Firefox 3.6 : +/- 90 seconds
Chrome 4.0.249 : After 4 minutes an execution dialog and it never ends loading.

Macbook Pro from 2009 with Windows XP Bootcamp on 2.8GHz Intel Core 2 Duo T9600
Internet Explorer 8.0.6001 : After 4 minutes an execution dialog and it never ends loading.
Safari 4.0.4 : +/- 48 seconds
Firefox 3.6 : +/- 61 seconds
Chrome 4.0.249 : After 4 minutes an execution dialog and it never ends loading.

So it is true : Safari is the fastest browser.
 Comments

Geocodes for SetEXIFData

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Ah, I finally got the Geocoding right! I was wondering why the pawn always jumped to the nearest known location or why it always gave the nearest known location although I put the pawn in the middle of nowhere. After examining lots of example's on Google's website I finally got it : the real geocodes are in the response.name field. So now I return those to the caller - in this case SetEXIFData.

You do not need to update; it's all on the web-server side of things.
 
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Smart Mailboxes in Apple Mail

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Smart Mailboxes in Apple's Mail are cool! I have set up an In & Sent smart mailbox which shows me all my incoming and sent messages, grouped by thread. Here's how to set it up:

First, create a Smart Mailbox:

Screenshot2010-01-21at19.01.24-2010-01-21-18-56

Then and add all Inboxes and Sent mailboxes from the email accounts you use. Choose the rule 'Message is in Mailbox' for every entry as I did in the example below.

sm1-2010-01-21-18-56

Next, drag the Smart Mailbox to the top in sidebar. Then you have it at hand all the time.

sm3-2010-01-21-18-56

And last, set the view to Threaded:

sm2-2010-01-21-18-56
 Comments

GPS on my iPhone

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There are a lot of discussions going on about the GPS accuracy on the iPhone. So I started a short test. I tried to get my home position every day and make a screen shot of it - it became 11 days because the error repeats itself on certain days. And I say now that it is not the iPhone (or maybe partly) but that it are those satellites that somehow send wrong signals, because every monday I am here, on every tuesday I am there, etc. So there's a pattern in the positions I am at through the week, although I always was at my house when I took the following screen shots.

I wrote the date in the upper right corner, you can see the time at the top, and put a circle around the spot where my house is. The blue dot marks the GPS spot.

IMG_0203-2009-12-29-00-11.PNG IMG_0207-2009-12-29-00-11.PNG IMG_0209-2009-12-29-00-11.PNG IMG_0211-2009-12-29-00-11.PNG

IMG_0212-2009-12-29-00-11.PNG IMG_0214-2009-12-29-00-11.PNG IMG_0215-2009-12-29-00-11.PNG IMG_0222-2009-12-29-00-11.PNG

IMG_0224-2009-12-29-00-11.PNG IMG_0241-2009-12-29-00-11.PNG IMG_0242-2009-12-29-00-11.PNG

So ... either one of these blue dots should be exactly at my house and the iPhone is very wrong, or all these blue positions are wrong and the satellites do something weird or are too far away from this city.

Update August 2010: since all iPhone3G updates and now my iPhone4, GPS works fine again.
 Comments

Wok Maxis

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We hebben op eerste kerstdag bij Wok Maxis gegeten. Dat was voor mijn vrouw en mij de eerste keer en zeker voor herhaling vatbaar. Ze hebben daar echt een fantastisch assortiment - je kunt daar echt uren doorbrengen met het lekkerste eten.IMG_0262-2009-12-26-10-33.JPG
IMG_0264-2009-12-26-10-33.JPGIMG_0265-2009-12-26-10-33.JPG
 Comments

SetEXIFData 2.5

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A new version of SetEXIFData is on-line. You can find it here.
This new version has
Geotagging and some minor repairs.
 
 Comments

Nu niet meer zeuren over films downloaden!

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Na onderstaand bericht over het toegenomen bioscoopbezoek kunnen de klagers over het downloaden van films zich weer in hun schulp terugtrekken tot er opnieuw iets te mekkeren valt:

IMG_0258-2009-12-20-22-23.PNG
 Comments
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