Lessons from Korean Innovation Model for ASEAN Countries Towards a Knowledge Economy

Joey D. Ocon,Doungkamon Phihusut,Julie Anne D. del Rosario,Trinh Ngoc Tuan,Jaeyoung Lee 과학기술정책연구원 2013 STI Policy Review Vol.4 No.2

The Association of Southeast Asian Nations (ASEAN) achieved relatively rapid economic growth over the past decade. Sustainable growth among member states, however, is put into question due to macroeconomic challenges, political risk, and vulnerability to external shocks. Developed countries, in contrast, have turned into less labor-intensive technologies to further expand their economies. In this paper, we review the science, technology, and innovation (STI) policies and statuses of the scientific and technological capabilities of the ASEAN member countries. Empirical results based on STI indicators (R&D spending, publications, patents, and knowledge economy indices) reveal considerable variation between the science and technology (S&T) competence and effectiveness of STI policies of ASEAN members. We have categorized nations into clusters according their situations in their S&T productivity. Under the Korean Innovation Model, Cambodia, Laos, Myanmar, and Brunei are classified as being in the institutional-building stage, while Malaysia, Thailand, Indonesia, the Philippines, and Vietnam in the catch up stage, and Singapore in the post-catch up stage. Finally, policy prescriptions on how to enhance the S&T capabilities of the developing ASEAN countries, based on the South Korea development experience, are presented.

Exploring novel dopants in graphene for electrocatalytic applications

( Joey D. Ocon ) 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0

Although platinum and platinum alloys (e.g. PtNi and PtCo) are widely regarded as the best catalysts for the oxygen reduction reaction (ORR) at present, they are expensive and still suffer from technical drawbacks. Recently, the exploration of Pt-free or even metal-free ORR catalysts including heteroatom-doped carbon nanomaterials is very active in the electrochemistry and carbon research communities. Previous investi-gations have employed five main dopant elements (i.e. nitrogen, boron, phosporus, sufur, and selenium). In this study, we explore a new set of dopant atoms (alkali, alkaline earth, and halogen atoms) for the two-dimensional graphene structure for possible ORR electrocatalytic application.

Current Status of Endoscopic Gallbladder Drainage

Joey Ho Yi Chan,Anthony Yuen Bun Teoh 대한소화기내시경학회 2018 Clinical Endoscopy Vol.51 No.2

The gold standard for treatment of acute cholecystitis is laparoscopic cholecystectomy. However, cholecystectomy is often not suitablefor surgically unfit patients who are too frail due to various co-morbidities. As such, several less invasive endoscopic treatmentmodalities have been developed to control sepsis, either as a definitive treatment or as a temporizing modality until the patient is stableenough to undergo cholecystectomy at a later stage. Recent developments in endoscopic ultrasound-guided gallbladder drainage (EUSGBD)with EUS-specific stents having lumen-apposing properties have demonstrated potential as a definitive treatment modality. Furthermore, advanced gallbladder procedures can be performed using the stents as a portal. With similar effectiveness as percutaneoustranshepatic cholecystostomy and lower rates of adverse events reported in some studies, EUS-GBD has opened exciting possibilities inbecoming the next best alternative in treating acute cholecystitis in surgically unfit patients. The aim of this review article is to providea summary of the various methods of GBD with particular focus on EUS-GBD and the many new prospects it allows.

초청 총설 : 다음세대 리튬이온 배터리용 고에너지 밀도 게르마늄 음극

조이오콘 ( Joey D. Ocon ),이재광 ( Jae Kwang Lee ),이재영 ( Jae Young Lee ) 한국공업화학회 2014 공업화학 Vol.25 No.1

리튬이온 배터리는 전기화학 에너지 저장 및 변환 기기에서 가장 높은 수준의 기술력을 기반으로 개발된 셀이며, 여전히 높은 에너지 밀도와 충방전 안정성이 높아서 가장 매력적인 배터리의 부류로서 평가 받고 있다. 최근 급속한 대형 에너지 저장 응용시스템의 개발이 이루어지면서 기존의 그래파이트 전극을 대체하기 위한 새로운 음극물질의 개발이 요구되고 있다. 게르마늄과 실리콘은 이론적 에너지 용량이 높아서 다음 세대 리튬 배터리의 적합한 물질로 평가 받고 있으며, 특히 게르마늄은 실리콘에 비해 충방전에 따른 부피변화가 상대적으로 적고, 리튬이온의 동력학 거동이 용이하며, 높은 전기전도도 특성이 있다. 본 총설에서는 우선 리튬이온 배터리의 기본 원리를 소개하고, 배터리 특성을 최대한 발휘할 수 있는 이상적인 음극 물질의 구조와 특성을 살펴보고자 한다. 다음 세대 음극물질로 고려되고 있는 게르마늄 복합체가 어떻게 현재의 리튬 배터리를 개선할 수 있을지를 논의하려고 한다. 그리고 최근 시도되고 있는 연구동향에 대한 소개를 끝으로 리튬이온 배터리의 고에너지 밀도화에 대한 참고문헌이 될 수 있기를 바란다. Lithium ion batteries (LIBs) are the state-of-the-art technology among electrochemical energy storage and conversion cells, and are still considered the most attractive class of battery in the future due to their high specific energy density, high effi-ciency, and long cycle life. Rapid development of power-hungry commercial electronics and large-scale energy storage appli-cations (e.g. off-peak electrical energy storage), however, requires novel anode materials that have higher energy densities to replace conventional graphite electrodes. Germanium (Ge) and silicon (Si) are thought to be ideal prospect candidates for next generation LIB anodes due to their extremely high theoretical energy capacities. For instance, Ge offers relatively lower volume change during cycling, better Li insertion/extraction kinetics, and higher electronic conductivity than Si. In this fo-cused review, we briefly describe the basic concepts of LIBs and then look at the characteristics of ideal anode materials that can provide greatly improved electrochemical performance, including high capacity, better cycling behavior, and rate capability. We then discuss how, in the future, Ge anode materials (Ge and Ge oxides, Ge-carbon composites, and other Ge-based composites) could increase the capacity of today`s Li batteries. In recent years, considerable efforts have been made to fulfill the requirements of excellent anode materials, especially using these materials at the nanoscale. This article shall serve as a handy reference, as well as starting point, for future research related to high capacity LIB anodes, especially based on semiconductor Ge and Si.

Quasi-perpetual discharge behaviour in p-type Ge–air batteries

Ocon, Joey D.,Kim, Jin Won,Abrenica, Graniel Harne A.,Lee, Jae Kwang,Lee, Jaeyoung The Royal Society of Chemistry 2014 Physical chemistry chemical physics Vol.16 No.41

<P>Metal–air batteries continue to become attractive energy storage and conversion systems due to their high energy and power densities, safer chemistries, and economic viability. Semiconductor–air batteries – a term we first define here as metal–air batteries that use semiconductor anodes such as silicon (Si) and germanium (Ge) – have been introduced in recent years as new high-energy battery chemistries. In this paper, we describe the excellent doping-dependent discharge kinetics of p-type Ge anodes in a semiconductor–air cell employing a gelled KOH electrolyte. Owing to its Fermi level, n-type Ge is expected to have lower redox potential and better electronic conductivity, which could potentially lead to a higher operating voltage and better discharge kinetics. Nonetheless, discharge measurements demonstrated that this prediction is only valid at the low current regime and breaks down at the high current density region. The p-type Ge behaves extremely better at elevated currents, evident from the higher voltage, more power available, and larger practical energy density from a very long discharge time, possibly arising from the high overpotential for surface passivation. A primary semiconductor–air battery, powered by a flat p-type Ge as a multi-electron anode, exhibited an unprecedented full discharge capacity of 1302.5 mA h g<SUB>Ge</SUB><SUP>−1</SUP> (88% anode utilization efficiency), the highest among semiconductor–air cells, notably better than new metal–air cells with three-dimensional and nanostructured anodes, and at least two folds higher than commercial Zn–air and Al–air cells. We therefore suggest that this study be extended to doped-Si anodes, in order to pave the way for a deeper understanding on the discharge phenomena in alkaline metal–air conversion cells with semiconductor anodes for specific niche applications in the future.</P> <P>Graphic Abstract</P><P>A semiconductor–air battery, powered by a flat p-type Ge anode, exhibits an unprecedented full discharge energy capacity and anode utilization efficiency relative to commercial metal–air batteries, and new metal–air batteries using 3D, nanostructured, and porous metal anodes. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cp02134g'> </P>

The Room

조이호(Joey Ho) 현대건축사 2012 (월간)Maru Vol.- No.127

An etched nanoporous Ge anode in a novel metal–air energy conversion cell

Ocon, Joey D.,Kim, Jin Won,Uhm, Sunghyun,Mun, Bongjin Simon,Lee, Jaeyoung The Royal Society of Chemistry 2013 Physical chemistry chemical physics Vol.15 No.17

<P>We first report the successful synthesis of porous germanium with ordered hierarchical structures, <I>via</I> controlled etching, and show its performance as an anode in a new metal–air battery. Our experimental results demonstrate the potential use of porous germanium in a high power density Ge–air energy conversion cell, showing a stable long-term discharge profile at various current drains.</P> <P>Graphic Abstract</P><P>A nanoporous germanium anode shows a stable long-term discharge profile and fast voltage dynamics at high current drains in a new Ge–air battery. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cp50885d'> </P>

Time to Tame American Military Interventionism

S.R. Joey Long,Shiping Tang 동아시아재단 2012 Global Asia Vol.7 No.1

Artificial Neural Network for Identification and Tracking Control of a Flexible Joint Two-Link Robot

김훈모,Joey K Parker 한국항공우주학회 1994 한국항공우주학회 학술발표회 논문집 Vol.- No.-

Highly improved discharge behaviour in a novel alkaline Ge- air energy conversion cell

이재영,( Joey Duran Ocon ),김진원 한국공업화학회 2013 한국공업화학회 연구논문 초록집 Vol.2013 No.1