2011 May Botanic Lab

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Ubuntu 11.04 Unity UI & Xinerama

Running into problem with Ubuntu again. I found that I can’t use Xinerama & Compiz together with Ubunut 10.10 (or earlier version. The problem is that Xinerama is not compatible with Compiz. The obvious solution is to either disable Xinerama (use twinview instead) or Compiz. I really want to use Xinerama as I really need […]

2011 May CUHK flowers

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New Dell PowerEdge R510

It can house 12 3.5″ hardisk in a 2U chassis!!

Image resolution of different lens I owned

(All results from

Sigma 17-50 mm f/2.8 EX DC OS HSM

Measured using a Canon 50D body (best prime: 52lpmm, decency level : 34-35lpmm)

At the maximum relative aperture we see excellent – maybe even outstanding, when we take into account the fact that we deal here with a zoom lens- results at the […]

VMware ESXi with Magic Pro MP-1920 SATA port multiper

After the testing and deployment of a StarDom external hardware RAID1 box with VMware ESXi to store the vm images (, I found another even better solution : A Magic Pro MP-1920 SATA port multiplier card (HK $230). It is an internal hardware RAID card which do not require any driver to be installed in […]

Clear jumplist in Windows 7

del %appdata%\microsoft\windows\recent\automaticdestinations\*

Lens profile support for Photoshop CS5

Two free backup program for Windows

EASEUS Todo Backup

Comodo backup

Comodo Time Machine

Topaz adjust and HDR

1. duplicate of the original background layer. Rename this new layer multiply. Set the transparency setting to multiply and the opacity to 40%.

2. Keep your multiply layer selected and apply the Topaz Adjust filter to that layer using the preset Mild Color Pop

3. Duplicate the original background layer again and name this layer […]