A5100754770- Catalytic Processes in Materials Science
- Polymer crystallization and properties
- Rheology and Fluid Dynamics Studies
- Catalysts for Methane Reforming
- Zeolite Catalysis and Synthesis
- Ammonia Synthesis and Nitrogen Reduction
- Catalysis and Oxidation Reactions
- Metal Alloys Wear and Properties
- Mesoporous Materials and Catalysis
- Hydrogen Storage and Materials
- Fatigue and fracture mechanics
- Carbon dioxide utilization in catalysis
- Microstructure and Mechanical Properties of Steels
- Nanoparticles: synthesis and applications
- Block Copolymer Self-Assembly
- Biosensors and Analytical Detection
- Graphene research and applications
- Mechanical Circulatory Support Devices
- Composite Material Mechanics
- Orthopaedic implants and arthroplasty
- Human-Automation Interaction and Safety
- Traffic and Road Safety
- Thin-Film Transistor Technologies
- Digital Imaging for Blood Diseases
- Titanium Alloys Microstructure and Properties
Pohang University of Science and Technology
2024-2025
Gyeongsang National University
2024
Chungbuk National University
2021-2023
Yonsei University
2015-2022
Inje University
2019
Sungkyunkwan University
2012-2017
Pusan National University
2014-2016
Research Institute of Industrial Science and Technology
2014
Hoseo University
2010
Andong National University
2008
Abstract An experimental study was carried out to investigate the effect of mixing on state dispersion and rheological properties in two‐phase flow polymer blends. For study, blends polystyrene polypropylene were used, two devices employed: a single‐screw extruder combined with “static mixer,” twin‐screw compounding machine. Materials various blending ratios extruded at constant temperature (200°C) through capillary die having an L / D ratio 20 ( = 0.125 in.). The system investigated from...
An experimental study on the dispersed two-phase flow of visco-elastic polymeric melts has been carried out. For study, blends two incompatible polymers, polystyrene and high-density polyethylene, were extruded through a circular tube having an L/D ratio 20. Mixing was achieved by combined use single-screw extruder Static Mixer (Kenics Corp., Thermogenizer). The state dispersion one polymer in another determined from microphotographs taken extrudate samples. variables investigated order to...
Hydrogen has been proposed as a clean energy source to replace fossil fuels. The hydrogen economy encompasses the production, storage, transport, and use of hydrogen. Among various potential carriers, ammonia is considered an efficient economical option due its established infrastructure for transport. In this value chain, decomposition enables sustainable production carbon‐free Recently, Co gained attention active metal thermal excellent catalytic performance cost‐effectiveness. This review...
Abstract Isothermal melt spinning experiments were carried out to investigate the elongational flow behavior and spinnability of polymer blends a calcium carbonate‐filled polypropylene. Blends chosen for study mixtures polystyrene (Dow Chemical, Styron 678) with high‐density polyethylene (Union Carbide, DMDJ 4309), 686) 4309). For study, measurements taken thread diameter by photographic techniques tension means Saxl tensiometer. These later used determine viscosity material investigated. It...
The effect of deformation history on the elongational behavior and spinnability polypropylene melt was investigated by carrying out isothermal melt-spinning experiments. For study, spinnerettes different die geometries were used to investigate effect, if any, entrance angle, capillary length-to-diameter (L/D) ratio, reservoir-to-capillary diameter (DR/D) ratio molten threadlines. An experimental study also carried phenomenon draw resonance in extrusion melts through geometries. Draw is which...
This study explores e-scooter riders' risky behaviour and motivation based on survey, observation, interview studies. 192 responses from an online survey showed that behaviours are categorised into errors, violations, defensive behaviour, proactive safety behaviour. Statistical analysis revealed significant differences in riding depending characteristics usage patterns. Results the observation a high frequency of such as not wearing helmet, sidewalk against traffic flow, or while listening...
Ni-DML- x catalysts synthesized via single-step hydrothermal treatment showed a volcano-shaped distribution in CO 2 methanation with respect to the temperature ( ).
We present a systematic study of grain size and carrier mobility behaviour in polycrystalline graphene films grown on copper substrates with various surface roughness values. first observe that as the substrate decreases, increases significantly, thus decreasing density boundaries. Then, using field-effect transistor structures, we confirm values increase, whatever channel length transistor. For rms around 5 nm (measured 10 × µm2 field) fast growth process (~40 min), obtain high ~6900 cm2...
Structural safety is one of the most important issues associated with liquefied natural gas (LNG) storage systems, such as LNG carriers, Floating Production Storage Offloading (FPSO), and Regasification Unit (FSRU). One common materials for systems has been 9% nickel steel over last 50 years it excellent mechanical properties under cryogenic temperature. Recently, there have efforts lowering content due to increased price well high based welding consumables. In this respect, 7% steels are...