10,978 research outputs found
Kinetically-controlled thin-film growth of layered - and NaCoO cobaltate
We report growth characteristics of epitaxial -NaCoO and
-NaCoO thin films on (001) sapphire substrates grown by
pulsed-laser deposition. Reduction of deposition rate could change structure of
NaCoO thin film from -phase with island growth mode to
-phase with layer-by-layer growth mode. The
-NaCoO thin film exhibits spiral surface growth with
multiterraced islands and highly crystallized texture compared to that of the
-NaCoO thin film. This heterogeneous epitaxial film growth
can give opportunity of strain effect of physical properties and growth
dynamics of NaCoO as well as subtle nature of structural change.Comment: accepted for publication in Applied Physics Letter
Land use survey and mapping and water resources investigation in Korea
The author has identified the following significant results. Land use imagery is applicable to land use classification for small scale land use mapping less than 1:250,000. Land use mapping by satellite is more efficient and more cost-effective than land use mapping from conventional medium altitude aerial photographs. Six categories of level 1 land use classification are recognizable from MSS imagery. A hydrogeomorphological study of the Han River basin indicates that band 7 is useful for recognizing the soil and the weathering part of bed rock. The morphological change of the main river is accurately recognized and the drainage system in the area observed is easily classified because of the more or less simple rock type. Although the direct hydrological characteristics are not obtained from the MSS imagery, the indirect information such as the permeability of the soil and the vegetation cover, is helpful in interpreting the hydrological aspects
The Challenges and Potential of Nuclear Energy for Addressing Climate Change
The response to climate change and the stabilization of atmospheric greenhouse gas concentrations has major implications for the global energy system. Stabilization of atmospheric carbon dioxide (CO2) concentrations requires a peak and an indefinite decline of global CO2 emissions. Nuclear energy, along with other technologies, has the potential to contribute to the growing demand for energy without emitting CO2. Nuclear energy is of particular interest because of its global prevalence and its current significant contribution, nearly 20%, to the world’s electricity supply. We have investigated the value of nuclear energy in addressing climate change, and have explored the potential challenges for the rapid and large-scale expansion of nuclear energy as a response to climate change. The scope of this study is long-term and the modeling time frame extends out a century because the nature of nuclear energy and climate change dictate that perspective. Our results indicate that the value of the nuclear technology option for addressing climate change is denominated in trillions of dollars. Several-fold increases to the value of the nuclear option can be expected if there is limited availability of competing carbon-free technologies, particularly fossil-fuel based technologies that can capture and sequester carbon. Challenges for the expanded global use of nuclear energy include the global capacity for nuclear construction, proliferation, uranium availability, and waste disposal. While the economic costs of nuclear fuel and power are important, non-economic issues transcend the issues of costs. In this regard, advanced nuclear technologies and new vision for the global use of nuclear energy are important considerations for the future of nuclear power and climate change
JOINT MOMENTS IN GAIT WITH SIDED LOAD CARRIAGE
INTRODUCTION: The present study investigated the biomechanical effects of weight variation for sided load carriage during walking upon joint moments by using the tracker agent and joint driving dynamic analysis
Nitride mediated epitaxy of CoSi2 through self-interlayer-formation of plasma-enhanced atomic layer deposition Co
The silicide formation by annealing plasma-enhanced atomic layer deposition (PE-ALD) Co and physical vapor deposition (PVD) Co was comparatively studied. Very pure Co films were deposited by PE-ALD with CoCp2 and NH3 plasma. However, various analyses have shown that amorphous SiNx interlayer was formed between PE-ALD Co and Si due to the NH3 plasma exposure in contrast with PVD Co. Due to the nitride interlayer, CoSi2 was epitaxially grown from PE-ALD Co by rapid thermal annealing through nitride mediated epitaxy. This process scheme is expected to provide a simple route for contact formation in future nanoscale devices. (c) 2007 American Institute of Physics.open112221sciescopu
Different Ankle Joint Energetic Pattern Between Subjects with Copers and Ankle Instability
Please refer to the pdf version of the abstract located adjacent to the title
Robust Real-time RGB-D Visual Odometry in Dynamic Environments via Rigid Motion Model
In the paper, we propose a robust real-time visual odometry in dynamic
environments via rigid-motion model updated by scene flow. The proposed
algorithm consists of spatial motion segmentation and temporal motion tracking.
The spatial segmentation first generates several motion hypotheses by using a
grid-based scene flow and clusters the extracted motion hypotheses, separating
objects that move independently of one another. Further, we use a dual-mode
motion model to consistently distinguish between the static and dynamic parts
in the temporal motion tracking stage. Finally, the proposed algorithm
estimates the pose of a camera by taking advantage of the region classified as
static parts. In order to evaluate the performance of visual odometry under the
existence of dynamic rigid objects, we use self-collected dataset containing
RGB-D images and motion capture data for ground-truth. We compare our algorithm
with state-of-the-art visual odometry algorithms. The validation results
suggest that the proposed algorithm can estimate the pose of a camera robustly
and accurately in dynamic environments
Estimation of surface PM<sub>2.5</sub> concentrations from atmospheric gas species retrieved from Tropomi using Deep Learning: Impacts of fire on air pollution over Thailand
- …