1,410,107 research outputs found
Wendy Hui Kyong Chun in Conversation with Adeline Koh
No full textAdeline Koh speaks with Wendy Chun concerning her thoughts on a new form of interdisciplinarity in higher education. Chun discusses topics such as the tolerance of failure, and comments on the changing status of the digital humanities. She also recommends some specific skills for the 21st-century humanist
Replication Data for: Social Insurance in an Aging Population: Impacts of a Government Transfer Program in South Korea
No full textReplication Data for: Social Insurance in an Aging Population: Impacts of a Government Transfer Program in South Korea by Kanghyock Koh and Hyunjoo Yan
Koh, Pak Keng
No full textDr Koh is currently the Director of ECK Pte Ltd, a company which specializes in providing cold spray equipment and services. Dr Koh is also a registered management consultant under the Enterprise Singapore Consultant Quality Initiative framework and acts as a consultant for numerous companies seeking AS9100 Quality Management System and Nadcap special process certification, specifically in the areas of thermal spray, chemical processing and heat treatment. Concurrently, Dr Koh is a content developer and examination writer for Performance Review Institute (PRI) which administers the PRI Qualification training programmes and the Nadcap special process certification. He also sits in the Management Committee of Association of Aerospace Industries (Singapore), holding the appointment of Assistant Honorary Treasurer and is an adjunct faculty with Embry-Riddle Aeronautical University.
Dr Koh graduated from Nanyang Technological University (NTU), Singapore with a Bachelor of Engineering Degree (Mechanical) in 1998 and a Master of Engineering degree under a post-graduate scholarship awarded by NTU in 2000. He graduated with a PhD degree in 2016, also from the School of Mechanical and Aerospace Engineering in NTU, specializing in the area of cold spray coating.https://commons.erau.edu/aviasian-bios-2021/1008/thumbnail.jp
CJ Koh Professorial Lecture Series; 3
No full textThis third report in the series captures the rich and insightful discussions arising from Professor Ruth Hayhoe’s visit to NIE in her appointment as the 7th CJ Koh Professor from 30 April to 4 May 2012. A comparative scholar who specialises in the field of comparative education in China, Prof Hayhoe delivered two lectures while here. A roundtable symposium was also organised in conjunction with her visit, where peers from Finland, Korea, Hong Kong, the United States, and colleagues from NIE engaged in dialogue about how their countries’ education systems continually innovate to stay on the top of their league
A Comparison of Chitosan Adhesion to KOH and H2O2 Pre-Treated Electrospun Poly(3-Hydroxybutyrate) Nanofibers
No full textChitosan coatings could effectively increase the biostability and biocompatibility of biomaterials while maintaining their structural integrity. In this study, electrospun fibrous polyhydroxybutyrate (PHB) membranes were pre-treated with potassium hydroxide (KOH) or hydrogen peroxide (H2O2) and then modified with dopamine (DA) and glutaraldehyde (GA) to improve their adhesion with chitosan (CS). Scanning electron microscopy (SEM), water contact angles (WCA), and Fourier transform infrared spectroscopy (FTIR) were used to demonstrate the successful generation of DA and GA-modified PHB fibers. KOH pre-treated PHB membranes exhibited superior binding efficiency with CS at low concentrations compared to their H2O2 pre-treated counterparts. The thermal analysis demonstrated a considerable decrease in the degradation temperature and crystallinity of KOH pre-treated membranes, with temperatures dropping from 309 °C to 265.5 °C and crystallinity reducing from 100% to 25.59% as CS concentration increased from 0 to 2 w/v%. In comparison, H2O2 pre-treated membranes experienced a mild reduction in degradation temperature, from 309 °C to 284.4 °C, and a large decrease in crystallinity from 100% to 43%. UV-vis analysis using Cibacron Brilliant Red 3B-A dye (CBR) indicated similar binding efficiencies at low CS concentrations for both pre-treatments, but decreased stability at higher concentrations for KOH pre-treated membranes. Mechanical testing revealed a considerable increase in Young’s modulus (2 to 14%), toughness (31 to 60%), and ultimate tensile stress (UTS) (14 to 63%) for KOH-treated membranes compared with H2O2 pre-treated membranes as CS concentration increased from 0 to 2 w/v%
A kinetic study of the leaching of a low-grade niobium-tantalum ore by concentrated KOH solution
No full textA kinetic study of the leaching of a low-grade niobium-tantalum ore by concentrated KOH solution under atmospheric pressure has been investigated. The effects of reaction temperature, KOH concentration, agitation speed, particle size and alkalito-ore mass ratio on the dissolution rate of niobium were examined. It was found that the dissolution rate of niobium is significantly influenced by the temperature, particle size and concentration of KOH solution. The experimental data were well interpreted with a shrinking core model under diffusion control through the product layer. By using the Arrhenius expression, the apparent activation energy for the dissolution of niobium was evaluated. Finally, on the basis of the shrinking core model, the following rate equation was established
Viewpoints: Dual-blocking antibody against VEGF-A and angiopoietin-2 for treating vascular diseases of the eye
No full text© 2022 Elsevier LtdFaricimab, a bispecific antibody that targets the endothelial cell growth factors vascular endothelial growth factor-A (VEGF-A) and angiopoietin-2 (Angpt2), was recently approved for treating neovascular age-related macular degeneration and diabetic macular edema. Here, Koh and Augustin review how mechanistic studies have translated into therapies, while Campochiaro evaluates their impact and value for clinical practice.11Nsciescopu
Koh Sang Woo - 20 years
No full textThis book is giving you the opportunity to enjoy and learn about the artist Koh Sang Woo and his journey of being a creator for 20 years. Year by year you can see and read the way Koh Sang Woo developed his skills to become the artist he is nowadays. You can not only enjoy his art pieces but can also read the story behind the masterpieces he has mad
Ionospheric signals from sub-ionospheric radio transmissions on 2016 August 27
No full textData collected from a wideband radio receiver in Bath, UK was analysed to obtain ionospheric signals from narrow band sub-ionospheric radio transmissions. The transmissions analysed in the dataset are callsigns GBZ (19.58kHz), GQD (22.1kHz), DHO (23.4kHz) and MSF (60kHz). The ionospheric signals reveal perturbations in the ionosphere along the propagation paths of the transmissions during the period of measurement on 2016 August 27. The dataset includes the processed ionospheric signals in Matlab binary format together with scripts that were used to obtain the ionospheric signals from the raw radio data.The experiment and wideband radio receiver are described in Koh et al. 2019 (doi: 10.1029/2019JA026863).The processing to obtain the VLF transmission disturbance is described in Koh et al. 2018 (doi:10.1002/2017RS006456) and Koh et al. 2019 (doi: 10.1029/2019JA026863)Matlab 2014
KOH-Induced Oxygen-Deficient VO<sub>2</sub> for High-Rate Aqueous Zn-Ion Batteries
No full textDue
to its high safety and low cost,
aqueous Zn-ion batteries (AZIBs) have become one of the most promising
energy storage devices. However, the development of a stable cathode
with fast kinetics and high-energy density is crucial to realize AZIBs
for large-scale application. In this work, KOH-induced oxygen-deficient
VO2 (K-VO2) was developed by activating doughnutlike
VO2 by KOH. Benefiting from the combination of a unique
morphology with abundant active sites and the oxygen vacancy, increasing
the interlayer spacing, both improved kinetics and enhanced Zn-ion
storage capability in the VO2 cathode are achieved. The
optimized K-VO2-3:4 delivers a specific capacity of 260.9
mA h g–1 at 0.2 A g–1, an excellent
high-rate capability of 166.1 mA h g–1 at 5 A g–1, and long-term cyclic stability with a capacity retention
of 88.1% after 3000 cycles. The electrochemical performance of K-VO2-3:4 has been greatly improved compared with untreated VO2. The KOH activation strategy proposed here also presents
an encouraging pathway for developing other high-energy and stable
cathodes
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