Kevin Yong

6 Questions 7 Answers 0 Followers

Questions related from Kevin Yong

Must unsupervised pre-processing method be used in tandem with only unsupervised (ie, NOT supervised) clustering / classification learning algorithms?

Dear all respectful researchers, I am working on a structured biomedical dataset that consists of many data type inconsistency, outliers and missing values (instances) on seven independent...

01 January 2018 4,890 7 View

Why there was an increase in derivative weight from 250 °C onwards in TGA?

The samples used is 16 mg of CMC-chitosan polymer and reference material (α-Al2O3). The method used was heated from 35 °C to 500 °C at 10 °C min−1 in flowing (50 mL min−1) nitrogen.

11 November 2014 3,470 4 View

Is there any substitutional method to cross-sectionally dissect hydrogel spherical particles besides using ultramicrotome?

I have technical difficulties in using ultramicrotome to cut my hydrogel beads. However, I did read about the use of nitrogen liquid treatment and followed by cutting using razor blade.In short, I...

04 April 2014 7,620 13 View

Does colloid silica mean silica gel?

I want to purchase colloid silica as mentioned in your research paper. However, the supplier refer it as silica gel. So, I am a bit confused and would like you to clarify this issue regarding the...

08 August 2013 9,905 15 View

Are lux meter and light meter the same devices that are used for light intensity? Are the lux unit convertible to W/m2?

I want to measure the light intensity for a xenon lamp, but I do not have access to a lux meter. I have a 'light meter,' however, that has been used to measure the Photosynthetic Active Region...

01 January 2013 2,795 23 View

Can anyone suggest any methods to measure the RPM of a magnetic stirrer that does not have any scales written on the instrument itself, nor in its operation manual?

I have to report the rpm for the stirrer provided, but I cannot measure it qualitatively and quantitatively. The magnetic stirrer is three years old. I cannot contact the manufacturer for some...

01 January 2013 9,366 6 View