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A Framework for Processing Brain Waves Used in a Brain-computer Interface
Sung, Yun-Sick,Cho, Kyun-Geun,Um, Ky-Hyun Korea Information Processing Society 2012 Journal of information processing systems Vol.8 No.2
Recently, methodologies for developing brain-computer interface (BCI) games using the BCI have been actively researched. The existing general framework for processing brain waves does not provide the functions required to develop BCI games. Thus, developing BCI games is difficult and requires a large amount of time. Effective BCI game development requires a BCI game framework. Therefore the BCI game framework should provide the functions to generate discrete values, events, and converted waves considering the difference between the brain waves of users and the BCIs of those. In this paper, BCI game frameworks for processing brain waves for BCI games are proposed. A variety of processes for converting brain waves to apply the measured brain waves to the games are also proposed. In an experiment the frameworks proposed were applied to a BCI game for visual perception training. Furthermore, it was verified that the time required for BCI game development was reduced when the framework proposed in the experiment was applied.
Cho, Sung Hwan,Jo, Seong Soon,Hwang, Ihn,Sung, Jinwoo,Seo, Jungmok,Jung, Seok-Heon,Bae, Insung,Choi, Jae Ryung,Cho, Himchan,Lee, Taeyoon,Lee, Jin Kyun,Lee, Tae-Woo,Park, Cheolmin American Chemical Society 2013 ACS NANO Vol.7 No.12
<P>Electroluminescent (EL) devices operating at alternating current (AC) electricity have been of great interest due to not only their unique light emitting mechanism of carrier generation and recombination but also their great potential for applications in displays, sensors, and lighting. Despite great success of AC–EL devices, most device properties are far from real implementation. In particular, the current state-of-the art brightness of the solution-processed AC–EL devices is a few hundred candela per square meter (cd m<SUP>–2</SUP>) and most of the works have been devoted to red and white emission. In this manuscript, we report extremely bright full color polymer AC–EL devices with brightness of approximately 2300, 6000, and 5000 cd m<SUP>–2</SUP> for blue (B), green (G), and red (R) emission, respectively. The high brightness of blue emission was attributed to individually networked multiwalled carbon nanotubes (MWNTs) for the facile carrier injection as well as self-assembled block copolymer micelles for suppression of interchain nonradiative energy quenching. In addition, effective FRET from a solution-blended thin film of B-G and B-G-R fluorescent polymers led to very bright green and red EL under AC voltage, respectively. The solution-processed AC–EL device also worked properly with vacuum-free Ag paste on a mechanically flexible polymer substrate. Finally, we successfully demonstrated the long-term operation reliability of our AC–EL device for over 15 h.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2013/ancac3.2013.7.issue-12/nn4040926/production/images/medium/nn-2013-040926_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn4040926'>ACS Electronic Supporting Info</A></P>
A two-photon ratiometric probe for detection of hNQO1 enzyme activity in human colon tissue
Cho, Myoung Ki,Lim, Chang Su,Sarkar, Avik Ranjan,Lee, Hyo Won,Choi, Hyeon Jin,Noh, Choong-Kyun,Shin, Sung Jae,Kim, Hwan Myung Elsevier 2018 Sensors and actuators. B Chemical Vol.272 No.-
<P><B>Abstract</B></P> <P>Human colonic carcinomas are one of the most common cancers in all Western countries, but there is no reliable method for quantitative and rapid analysis of colon cancer. Herein, we report an hNQO1 enzyme-selective and two-photon emission ratiometric probe (<B>SHC</B>) for quantitative analysis of hNQO1 activity in human colon tissue. This probe shows a blue-to-yellow emission color change in response to hNQO1, high sensitivity and selectivity for hNQO1 over other bio-metabolites, and two-photon microscopy (TPM) imaging capability, thereby allowing precise monitoring of the activity of hNQO1 in situ. Ratiometric TPM imaging with <B>SHC</B> in human colon tissues revealed that hNQO1 activities gradually increased during cancer progression from normal to adenoma, and to adenocarcinoma colon tissues. These findings demonstrated that <B>SHC</B> labeling can detect the differential activities of hNQO1 in the distinct stages of colon neoplasm. Thus, this approach, enzyme-selective TP probe labeling, will likely provide a reliable and fast method for precise diagnosis of colon cancer.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A two-photon emission ratiometric probe for hNQO1 activity was developed. </LI> <LI> The probe shows high sensitivity and selectivity for hNQO1 over other bio-metabolites. </LI> <LI> Quantitative analysis of hNQO1 activity in human colon tissues was demonstrated. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Case Reports : Two Cases of Giant Epidermal Cyst Occurring in the Neck
( Sang Gue Kang ),( Chul Han Kim ),( Hong Ki Cho ),( Mi Youn Park ),( Yoon Jin Lee ),( Moon Kyun Cho ) 대한피부과학회 2011 Annals of Dermatology Vol.23 No.1S
Epidermal cysts are the most common cysts of the skin. A conventional epidermal cyst rarely reaches a size of more than 5 cm in diameter. We report on two cases of giant epidermal cyst occurring in the neck. One patient had a cyst measuring 12×9×9 cm and the other patient had a non-pulsatile, dome-shaped lesion in the neck, which measured 6×5×3 cm. The lesions were totally excised. Histopathologically, both were confirmed as giant epidermal cysts. (Ann Dermatol 23(S1) S135~S138, 2011)
Cho, Sang-Min,Choi, Hoo-Kyun The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.5
A mucoadhesive microsphere was prepared by an interpolymer complexation and solvent evaporation method, using chitosan and poly(acrylic acid) (PAA), to prolong the gastric resid ence time of the delivery system. The Fourier transform infrared results showed that microspheres were formed by an electrostatic interaction between the carboxyl groups of the PAA and the amine groups of the chitosan. X-ray diffraction and differential scanning calorimetry analysis showed that the enrofloxacin in the chitosan-PAA microsphere was molecularly dispersed in an amorphous state. Scanning electron microscopy of the surface and the quantity of mucin attached to the microspheres indicated that chitosan-PAA microspheres had a higher affinity for mucin than those of chitosan alone. The swelling and dissolution of the chitosan-PAA microspheres were found to be dependent on the pH of the medium. The rate of enrofloxacin released from the chitosan-PAA microspheres was slower at higher pH; therefore, based on their mucoadhesive properties and morphology, the chitosan-PAA microspheres can be used as a mucoadhesive oral drug delivery system.
Sang Kyun Cho(趙湘均),Young Jin oh(吳永鎭),Sug Kee Suh(徐錫埼),Hak Sin Kim(金學信),Soo Dong Kim(金洙東),Young Sun Chang(張榮宣),Kyeong Gu Choi(崔京求) 한국육종학회 1995 한국육종학회지 Vol.27 No.2
Improvement of sprout soybeans could be accomplished by maintenance and collection of varieties which have characteristics of small seed, disease resistance and high yielding ability. This research was conducted to investigate morphological and ecological characters for 102 sprout soybean varieties collected in Chonnam and Chonbuk area, and donated by Sprout Soybean Association and Genetic Engineering Research Institute. The sprout soybean collections contained 85% purple flower color, 76% ring-type leaf, 68% brown trichome, 57% elliptical-type seed, 69% yellow seed color and 44% brown hilum color. Days to flowering ranged from 53 to 79 days and growth duration averaged 137 days, with the range of 119~149 days. Stem length ranged from 52㎝ to 165㎝ and 100-seed weight distributed into 4.9~13.3g. The grain yield revealed large range of 0.53~4.18MT/ha. Crude protein and lipid contents was ranged 35.8~48.7% (average 40.9%), and 19.1~’21.2% (average 20.1%), respectively. Correlation coefficients between grain yield and pod numbers was significantly positive, while that between 100-seed weight and pod numbers was significantly nagative. Crude protein contents was significantly associated with growth duration but negatively correlated with 100-seed weight and yield. Crude lipid contents was negatively correlated with growth duration but positively associated with 100-seed weight.