A5017523458- Radio Astronomy Observations and Technology
- Superconducting and THz Device Technology
- Cosmology and Gravitation Theories
- Reproductive Biology and Fertility
- Ovarian function and disorders
- Galaxies: Formation, Evolution, Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Magnetic properties of thin films
- Precipitation Measurement and Analysis
- Assisted Reproductive Technology and Twin Pregnancy
- Quantum and electron transport phenomena
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Inertial Sensor and Navigation
- Advancements in PLL and VCO Technologies
- Geophysics and Gravity Measurements
- Sperm and Testicular Function
- Thermal Radiation and Cooling Technologies
- Urban Stormwater Management Solutions
- Scientific Research and Discoveries
- Flood Risk Assessment and Management
- Magnetic Field Sensors Techniques
- Advanced Data Compression Techniques
- Silicon and Solar Cell Technologies
Korea University
2008-2024
National University of Singapore
2017
This study demonstrates a cost-effectiveness analysis of stormwater BMPs to answer questions, such as what type place and how large it should be. Cost-effective showed that for the basin considered, porous pavement was most effective means controling runoff, which able bring peak runoff down predevelopment level with least budget. A storage second best, predeveloped conditions, but higher The effectiveness green roof in reducing plateaued beyond certain budget, unable level, regardless cost....
Abstract Understanding telescope pointing (i.e. line of sight) is important for observing the cosmic microwave background (CMB) and astronomical objects. The Moon a candidate source calibration. Although visible size (30′) larger than that planets, we can frequently observe once month with high signal-to-noise ratio. We developed method performing calibration using observational data from Moon. considered tilts axes as well encoder collimation offsets In addition, evaluated effects...
Abstract We compute the expected sensitivity on measurements of optical depth to reionization for a ground-based experiment at Teide Observatory. simulate polarized partial sky maps GroundBIRD frequencies 145 and 220 GHz. perform fits simulated with our pixel-based likelihood extract reionization. The noise levels polarization are estimated as 110 <?CDATA $\mu {\rm{K}}\,\mathrm{arcmin}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>μ</mml:mi> <mml:mi...
Polarized patterns in the cosmic microwave background (CMB) radiation contains rich knowledge for early stage of universe. In particular their odd-parity at large angular scale (> 1°), primordial B-modes, are smoking-gun evidence inflation. The GroundBIRD experiment aims to detect these B-modes with a ground-based apparatus that includes several novel devices: high-speed rotational scan system, cold optics, and kinetic inductance detectors (MKIDs). We plan start observations Canary Islands...
GroundBIRD is a ground-based telescope for measuring the polarization of cosmic microwave background radiation, and it soon to be operational at Teide Observatory. The employs Mizuguchi-Dragone dual reflectors 161 kinetic inductance detectors coupled with single antennas as photon detectors. We present results our optical simulation on pointing direction, stray light response, influence blackbody radiation from baffle. also find that power baffle incident reduced by 99.95% when corrugated...
Spin-orbit torques (SOT) allow the electrical manipulation of magnetic states.
Our understanding of physics at very early Universe, as 10 −35 s after the Big Bang, relies on scenario known inflationary cosmology. Inflation predicts a particular polarization pattern in cosmic microwave background, B -mode yet strength such is extremely weak. To search for we are constructing an off-axis rotating telescope to mitigate systematic effects well maximize sky coverage observation. We will discuss present status GroundBIRD telescope.
We have evaluated the performance characteristics of a small field view (SFOV) gamma camera, JanuCam made by Nucare Medical Systems, Inc., dedicated for organ such as breast, thyroid and joints. The camera contains 2 inch PMTs coupled with single slab NaI(Tl) plate crystal. characteristic is assessed following standardized procedure outlined National Electrical Manufacturing Association (NEMA) NU 1-2007. SFOV provides an energy resolution 9.86% Tc-99m source. intrinsic spatial 3.21 mm both...
Understanding telescope pointing (i.e., line of sight) is important for observing the cosmic microwave background (CMB) and astronomical objects. The Moon a candidate source calibration. Although visible size ($\ang{;30}$) larger than that planets, we can frequently observe once month with high signal-to-noise ratio. We developed method performing calibration using observational data from Moon. considered tilts axes as well encoder collimation offsets In addition, evaluated effects...
Investigation has been conducted to characterize the intrinsic performance of a SDD (silicon drift diode) based gamma detector under various conditions.
The unidirectional propagation of signals is the key to modern electronic logic circuits and fundamental applications such as a diode, isolator, gyrator, circulator.