1. Present to Kru John

2. Members
1. Virunyupa kittikasemsak
( Beam ) no.23
2.Napat Tanteerapat ( Jeen
) No.24
3. Kanokluck Thongkalya (
Book ) No. 25
4. Sukrittaya Chokchaipruk
( Proud ) no.26

3. What disruptive technology did you select?
In disruptive technology , we selected
Subtractive .
Subtractive is the manufacturing of
products by machine tools that reduce a
solid block of metal or other material by
any combination of drilling, turning on a
lathe and grinding. Contrast with additive
fabrication. See numerical control.

4. We are interested in Mobile Learning .
The term m-learning ("mobile
learning"), has different meanings for
different communities, covering a range
of use scenarios including e-learning,
educational technology and distance
education, that focuses on learning with
mobile devices. Mobile learning is
defined as "learning across multiple
contexts, through social and content
interactions, using personal electronic
devices”.
WHAT SPECIFIC TECHNOLOGY ARE YOU
INTERESTED IN?

5.  subtractive is really CNC machining—a
process that removes material from a
larger piece of material through standard
machining processes such as milling,
turning/lathing or drilling until the
prototype part is created.
 Subtractive prototyping gives you the
opportunity to design, prototype, and
manufacture in end-use materials. It is an
appropriate choice for parts used for small
and large volume production runs, to
obtain specific finishes, or to obtain

6. subtractive prototyping and
manufacturing needs in-house, you
can purchase desktop and larger
sized machines from Roland DGA, an
OEM of subtractive prototyping
machines. Should you wish to use
outside services for your subtractive
needs, you can choose from a
number of vendors, such as Proto
Labs. These subtractive prototyping
and manufacturing providers are
skilled in CNC machining and can
deliver prototypes and finished parts
very quickly, often in a day or two.

7.  Subtractive prototyping typically works
with resins or metal materials, including
ABS, Acetal Coplymer, acrylic, aluminum,
brass, Delrin, HDPE, HMW, LDPE, Lexan,
Lucite, Nylon, PEEK, PVC, Phenolic,
plexiglass, polycarbonate, polypropylene,
Rulon, Teflon, UHMW, Ultem, and wood.
Depending on your application, you can
match your design to a material for
strength, flexibility, chemical resistance,

8. How was Subtractive invented?
 Subtractive process invented subtractive
colour mixing . Subtractive color mixing is
the kind of mixing you get if you illuminate
colored filters with white light from
behind, as illustrated at left. The
commonly used subtractive primary colors
are cyan, magenta and yellow, and if you
overlap all three in effectively equal
mixture, all the light is subtracted giving
black. Subtractive color mixing is more
complex than the additive color mixing
you get with colored spotlights.

9. HOW IS SUBTRACTIVE BEING USED TO MAKE
TOOLS?
 Subtractive used in printing processes to reproduce
all colors.
 Magazines, photographs and any other object of
nature creates color by subtracting or absorbing
certain wavelengths of color while reflecting other
wavelengths back to the viewer (“RGB World”).
 All color printing processes use the subtractive
process to reproduce color (“RGB World”). In these
cases, the reflective substrate is canvas or paper,
which is usually white (“RGB World”).

10. Suppression subtractive hybridization
Subtractive hybridization is a technology that allows for
PCR-based amplification of only cDNA fragments that differ
between a control (driver) and experimental transcriptome.
cDNA is produced from mRNA. Differences in relative abundance
of transcripts are highlighted, as are genetic differences between
species. The technique relies on the removal of dsDNA formed by
hybridization between a control and test sample, thus eliminating
cDNAs or gDNAs of similar abundance, and retaining
differentially expressed, or variable in sequence, transcripts or
genomic sequences.
Suppression subtractive hybridization has also been
successfully used to identify strain- or species-specific DNA
sequences in a variety of bacteria including Vibrio species.

11. *Combining Subtractive &
Additive Systems for the Best of
Both Worlds
Mon, 03/17/2014 - 3:25pm
Rachel Hammer, Product Manager, Roland DGA Corp.
In the world of product design and development,
few new technologies have generated headlines like
today’s 3-D printers. Popular among engineers and
hobbyists alike, these devices are producing
everything from prototypes and parts to fully
functional products, jewelry and toys. While additive
systems are well suited for a variety of applications,
any seasoned engineer knows that when it comes to
tools, the more you have the better.

13. Resources
 http://en.wikipedia.org/wiki/Suppressio
n_subtractive_hybridization
 http://hyperphysics.phy-
astr.gsu.edu/hbase/vision/subcol.html
 http://en.wikipedia.org/wiki/M-learning