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Seul Ki Hong from Professor Byung Jin Cho’s research group received the Best Poster Award at the 2nd Korean Graphene Symposium.

The Korean Graphene Symposium is an event to share and discuss the trend and results of research on graphene/carbon, as well as 2-dimensional nanomaterials. This year’s main topics were “general physics, chemistry, and applied research on graphene and 2-dimensional materials”.

* Name of the Conference : The 2nd Korean Graphene Symposium

* Date : March 26, 2015 ~ March 27, 2015

* Venue : Buyeo, South Korea

* Award Title : Best Poster Award

* Paper Title : Vertical graphene field-effect transistor using direct growth graphene nanoribbon

* Authors : Seul Ki Hong, Jaehoon Bong, Wansik Hwang, and Byung Jin Cho

 

A newly developed user interface, the “i-Mouse,” in the K-Glass 2 tracks the user’s gaze and connects the device to the Internet through blinking eyes such as winks. This low-power interface provides smart glasses with an excellent user experience, with a long-lasting battery and augmented reality.

 

Smart glasses are wearable computers that will likely lead to the growth of the Internet of Things. Currently available smart glasses, however, reveal a set of problems for commercialization, such as short battery life and low energy efficiency. In addition, glasses that use voice commands have raised the issue of privacy concerns.

 

A research team led by Professor Hoi-Jun Yoo of the Electrical Engineering Department at the Korea Advanced Institute of Science and Technology (KAIST) has recently developed an upgraded model of the K-Glass (http://www.eurekalert.org/pub_releases/2014-02/tkai-kdl021714.php) called “K-Glass 2.”

 

K-Glass 2 detects users’ eye movements to point the cursor to recognize computer icons or objects in the Internet, and uses winks for commands. The researchers call this interface the “i-Mouse,” which removes the need to use hands or voice to control a mouse or touchpad. Like its predecessor, K-Glass 2 also employs augmented reality, displaying in real time the relevant, complementary information in the form of text, 3D graphics, images, and audio over the target objects selected by users.

 

The research results were presented, and K-Glass 2’s successful operation was demonstrated on-site to the 2015 Institute of Electrical and Electronics Engineers (IEEE) International Solid-State Circuits Conference (ISSCC) held on February 23-25, 2015 in San Francisco. The title of the paper was “A 2.71nJ/Pixel 3D-Stacked Gaze-Activated Object Recognition System for Low-power Mobile HMD Applications” (http://ieeexplore.ieee.org/Xplore/home.jsp).

 

The i-Mouse is a new user interface for smart glasses in which the gaze-image sensor (GIS) and object recognition processor (ORP) are stacked vertically to form a small chip. When three infrared LEDs (light-emitting diodes) built into the K-Glass 2 are projected into the user’s eyes, GIS recognizes their focal point and estimates the possible locations of the gaze as the user glances over the display screen. Then the electro-oculography sensor embedded on the nose pads reads the user’s eyelid movements, for example, winks, to click the selection. It is worth noting that the ORP is wired to perform only within the selected region of interest (ROI) by users. This results in a significant saving of battery life. Compared to the previous ORP chips, this chip uses 3.4 times less power, consuming on average 75 milliwatts (mW), thereby helping K-Glass 2 to run for almost 24 hours on a single charge.

 

Professor Yoo said, “The smart glass industry will surely grow as we see the Internet of Things becomes commonplace in the future. In order to expedite the commercial use of smart glasses, improving the user interface (UI) and the user experience (UX) are just as important as the development of compact-size, low-power wearable platforms with high energy efficiency. We have demonstrated such advancement through our K-Glass 2. Using the i-Mouse, K-Glass 2 can provide complicated augmented reality with low power through eye clicking.”

 

Professor Yoo and his doctoral student, Injoon Hong, conducted this research under the sponsorship of the Brain-mimicking Artificial Intelligence Many-core Processor project by the Ministry of Science, ICT and Future Planning in the Republic of Korea.

 

 

 

Picture 1: K-Glass 2

 

K-Glass 2 can detect eye movements and click computer icons via users’ winking.

 

Picture 2: Object Recognition Processor Chip

 

This picture shows a gaze-activated object-recognition system.

 

Picture 3: Augmented Reality Integrated into K-Glass 2

 

Users receive additional visual information overlaid on the objects they select.

 

The wearable thermoelectric generator developed by Professor Byung Jin Cho and his team of researchers received the Grand Prix at the UNESCO Netexplo Award 2015. It was previously designated one of the top ten technologies that will change the world, and was finally awarded the Grand Prix. The followings are the video clips regarding this technology. 

KBS News Line 

https://www.youtube.com/watch?v=V8dM0WWKnhg

SBS Public Campaign Advertisement

https://www.youtube.com/watch?v=k63Yj-SFzaM

 

 

The collaborative research by Professor Byung Jin Cho and Professor Seunghyup Yoo of the Electrical Engineering Department and Professor Sung Gap Im of the Chemical and Bimolecular Engineering Department has recently been published online on Nature Materials (IF=36.425) (Nature Materials 14, 628 (2015)).

The below is the article extracted from the official homepage of KAIST.

Using an initiated chemical vapor deposition technique, the research team created an ultrathin polymeric insulating layer essential in realizing transistors with flexibility and low power consumption. This advance is expected to accelerate the commercialization of wearable and soft electronics.   A group of researchers at the Korea Advanced Institute of Science and Technology (KAIST) developed a high-performance ultrathin polymeric insulator for field-effect transistors (FETs). The researchers used vaporized monomers to form polymeric films grown conformally on various surfaces including plastics to produce a versatile insulator that meets a wide range of requirements for next-generation electronic devices. Their research results were published online in Nature Materials on March 9th, 2015.   FETs are an essential component for any modern electronic device used in our daily life from cell phones and computers, to flat-panel displays. Along with three electrodes (gate, source, and drain), FETs consist of an insulating layer and a semiconductor channel layer. The insulator in FETs plays an important role in controlling the conductance of the semiconductor channel and thus current flow within the translators. For reliable and low-power operation of FETs, electrically robust, ultrathin insulators are essential. Conventionally, such insulators are made of inorganic materials (e.g., oxides and nitrides) built on a hard surface such as silicon or glass due to their excellent insulating performance and reliability.   However, these insulators were difficult to implement into soft electronics due to their rigidity and high process temperature. In recent years, many researchers have studied polymers as promising insulating materials that are compatible with soft unconventional substrates and emerging semiconductor materials. The traditional technique employed in developing a polymer insulator, however, had the limitations of low surface coverage at ultra-low thickness, hindering FETs adopting polymeric insulators from operating at low voltage.   A KAIST research team led by Professor Sung Gap Im of the Chemical and Biomolecular Engineering Department and Professor Seunghyup Yoo and Professor Byung Jin Cho of the Electrical Engineering Department developed an insulating layer of organic polymers, “pV3D3,” that can be greatly scaled down, without losing its ideal insulating properties, to a thickness of less than 10 nanometers (nm) using the all-dry vapor-phase technique called the “initiated chemical vapor deposition (iCVD).”   The iCVD process allows gaseous monomers and initiators to react with each other in a low vacuum condition, and as a result, conformal polymeric films with excellent insulating properties are deposited on a substrate. Unlike the traditional technique, the surface-growing character of iCVD can overcome the problems associated with surface tension and produce highly uniform and pure ultrathin polymeric films over a large area with virtually no surface or substrate limitations. Furthermore, most iCVD polymers are created at room temperature, which lessens the strain exerted upon and damage done to the substrates.   With the pV3D3 insulator, the research team built low-power, high-performance FETs based on various semiconductor materials such as organics, graphene, and oxides, demonstrating the pV3D3 insulator’s wide range of material compatibility. They also manufactured a stick-on, removable electronic component using conventional packaging tape as a substrate. In collaboration with Professor Yong-Young Noh from Dongguk University in Korea, the team successfully developed a transistor array on a large-scale flexible substrate with the pV3D3 insulator.   Professor Im said, “The down-scalability and wide range of compatibility observed with iCVD-grown pV3D3 are unprecedented for polymeric insulators. Our iCVD pV3D3 polymeric films showed an insulating performance comparable to that of inorganic insulating layers, even when their thickness were scaled down to sub-10 nm. We expect our development will greatly benefit flexible or soft electronics, which will play a key role in the success of emerging electronic devices such as wearable computers.”   The title of the research paper is “Synthesis of ultrathin polymer insulating layers by initiated chemical vapor deposition for low-power soft electronics” (Digital Object Identifier (DOI) number is 10.1038/nmat4237).   Picture 1: A schematic image to show how the initiated chemical vapor deposition (iCVD) technique produces pV3D3 polymeric films: (i) introduction of vaporized monomers and initiators, (ii) activation of initiators to thermally dissociate into radicals, (iii) adsorption of monomers and initiator radicals onto a substrate, and (iv) transformation of free-radical polymerization into pV3D3 thin films.   Picture 2: This is a transistor array fabricated on a large scale, highly flexible substrate with pV3D3 polymeric films.   Picture 3: This photograph shows an electronic component fabricated on a conventional packaging tape, which is attachable or detachable, with pV3D3 polymeric films embedded.

 

Dr. Hanul Moon from Prof. Yoo’s research team and Dr. Woo Cheol Shin from Prof. Cho’s research team of the Electrical Engineering Department and Hyejeong Seong of the Chemical and Bimolecular Engineering Department are designated as co-first authors.

 

Professor Jinwoo Shin received 2015 ACM Sigmetrics Rising Star Research Award.

Established in 2008, ACM Sigmetrics Rising Star Award is bestowed annually on a young scientist – within 7 years after receiving one’s Ph.D. degree – and it was given to Prof. Jinwoo Shin for his influential contributions to the theoretical analysis in the fields of stochastic queuing networks and graphical models.

More detailed information can be found in the links below.

 

Related Links: Official announcement / Past winners / Award talk

Dae Hoe Kim in Prof. Yong Man Ro’s research group received the Honorable Mention Poser Award for the paper on “Feature extraction from inter-view similarity of DBT projection views” in Computer-Aided Diagnosis area at SPIE Medical Imaging 2015 which was held in Orlando, USA from 2015/2/21 ~2/26.

 

 

 

 

 

 

 

 

Posted on January 30, 2015 by Korea Bizwire in Other Technologies, Science, Top News http://koreabizwire.com/kaists-wearable-generator-on-unesco-list/29068         SEOUL, Jan. 30 (Korea Bizwire) — Korea’s wearable thermo-element technology, which can recharge batteries through skin contact, was selected as one of the top innovations of the year by UNESCO.   The Korea Advanced Institute of Science and Technology (KAIST) announced on January 29 that its “wearable thermoelectric device” was selected as one of the top ten IT innovations at the 2015 Netexplo Awards, presented in partnership with UNESCO.   The Netexplo Awards are given annually to tech inventions worldwide that have had a major influence on human life in areas such as energy, environment and education.   Last April, Professor Cho Byung-jin and his research fellows developed the world’s first wearable element by realizing thermoelectric film on fiberglass. The wearable element can effectively generate electricity from human body heat, is very light and thin, and can easily be integrated into clothing.   Wearable devices are expected to stand at the center of future electronics, but batteries that need to be recharged frequently consist of a challenging problem. With its minimal weight and high generation capability, the technology is rising as a key to solve the battery problem for wearable devices.   In addition, it can be applied to a variety of devices generating waste heat, such as equipment in cars, planes and factories. As part of its efforts, the KAIST research team has established a start-up named TEGway to pursue commercialization of the technology.   For the UNESCO Netexplo Awards, about 200 IT experts vote to pick 10 winners. The award ceremony will be held in Paris on February 4. Among the 10 finalists, the one that receives the most online votes will be honored as the 2015 Grand Prix winner.   Other top ten awardees include an eco-friendly “W.Afate 3D Printer,” a recycled smartphone based on an anti-deforestation scheme dubbed “Rainforest Connection,” a big data empowered education web known as “Branching Minds,” a math coaching app called “PhotoMath,” and smart chopsticks that analyze the ingredients in dishes called “Baidu Kuai Sou.”

 

“A Stamp Of Approval For Graphene Transfer” from Asian Scientist Magazine

 

 

 

 

 

Asian Scientist (Jan. 30, 2015) – Researchers have developed a new technique to produce a single-layer graphene from a metal etching. The research findings, published as the lead article in the journal Small, mean that transferring a graphene layer onto a circuit board can be done as easily as stamping a seal on paper.

 

 

This technology will allow different types of wafer transfer methods such as transfer onto a surface of a device or a curved surface and large surface transfer onto a four inch wafer. It can be applied in the field of wearable smart gadgets through commercialization of graphene electronic devices.

 

 

The traditional method used to transfer graphene onto a circuit board is a wet transfer. However, wet transfer faces serious drawbacks as the graphene layer can be damaged or contaminated during the transfer process from residue from the metal etching. This may affect the electrical properties of the transferred graphene.

 

 

Instead, a team of researchers led by Professor Choi Sung-Yool from the Korea Advanced Institute of Science and Technology (KAIST) have adopted a stamping approach. After a graphene growth substrate formed on a catalytic metal substrate is pretreated in an aqueous poly vinyl alcohol (PVA) solution, a PVA film forms on the pretreated substrate. The substrate and the graphene layers bond strongly. The graphene is then lifted from the growth substrate by means of an elastomeric stamp.

 

 

The delaminated graphene layer is isolated state from the elastomeric stamp and thus can be freely transferred onto a circuit board. As the catalytic metal substrate can be reused and does not contain harmful chemical substances, such transfer method is very eco-friendly.

 

 

“As the new graphene transfer method has a wide range of applications and allows a large surface transfer, it will contribute to the commercialization of graphene electronic devices,” Choi said.

 

 

He added that “because this technique has a high degree of freedom in transfer process, it has a variety of usages for graphene and two dimensional nano-devices.”

 

 

The article can be found at:

Yang et al. (2015) Metal-Etching-Free Direct Delamination and Transfer of Single-Layer Graphene with a High Degree of Freedom

http://onlinelibrary.wiley.com/doi/10.1002/smll.201401196/abstract

 

Prof. Dan Keun Sung is elevated as fellow for IEEE Communications Soceity 2015.

 

Dan Keun Sung
Korea Advanced Institute of Science and Technology (KAIST) Daejeon, Korea

for contributions to network resource management

 

 

 

 

IEEE Fellow is a distinction reserved for select IEEE members whose extraordinary accomplishments in any of the IEEE fields of interest are deemed fitting of this prestigious grade elevation. Review the sections on this page to learn about the history of the IEEE Fellow grade, the elevation process, and how the program evolved through the years to become the program it is today.

 

 

 

Graduate students Seong-Hwan Kim, Kyung-No Joo, Yun-Gi Ha, and Gyu-Beom Choi (advisor : Chan-Hyun Youn) received Best Paper Award from 5th International Conference on Cloud Computing (CloudComp2014) for the paper titled “A Phased Workflow Scheduling Scheme with Task Division Policy in Cloud Broker.