Results 41 to 50 of about 39,551 (165)

First airborne water vapor lidar measurements in the tropical upper troposphere and mid-latitudes lower stratosphere: accuracy evaluation and intercomparisons with other instruments [PDF]

Atmospheric Chemistry and Physics, 2008
In the tropics, deep convection is the major source of uncertainty in water vapor transport to the upper troposphere and into the stratosphere. Although accurate measurements in this region would be of first order importance to better understand the ...
C. Schiller, T. Gardiner, U. Schumann, G. Ehret, A. Fix, M. Wirth, C. Kiemle, N. Sitnikov, G. Stiller   +8 more
doaj  

Comparison of CO₂ Vertical Profiles in the Lower Troposphere between 1.6 µm Differential Absorption Lidar and Aircraft Measurements Over Tsukuba

Sensors, 2018
A 1.6 μm differential absorption Lidar (DIAL) system for measurement of vertical CO2 mixing ratio profiles has been developed. A comparison of CO2 vertical profiles measured by the DIAL system and an aircraft in situ sensor in January 2014 over the ...
Yasukuni Shibata, Chikao Nagasawa, Makoto Abo, Makoto Inoue, Isamu Morino, Osamu Uchino   +5 more
doaj   +1 more source

Research on Measuring Industrial Carbon Dioxide Emissions by Mobile Differential Absorption Lidar

Applied Sciences
Industrial activities represent the primary source of anthropogenic carbon dioxide (CO2) emissions, and accurate monitoring of industrial CO2 emissions is critical to mitigating greenhouse gas emissions.
Jinliang Zang, Liang Wu, Wanglong Shi, Hongjun Wang, Menghui Wu, Hong Lin   +5 more
doaj   +1 more source

Improvement of CO2-DIAL Signal-to-Noise Ratio Using Lifting Wavelet Transform

Sensors, 2018
Atmospheric CO2 plays an important role in controlling climate change and its effect on the carbon cycle. However, detailed information on the dynamics of CO2 vertical mixing remains lacking, which hinders the accurate understanding of certain key ...
Chengzhi Xiang, Ge Han, Yuxin Zheng, Xin Ma, Wei Gong   +4 more
doaj   +1 more source

Cost-effective Fully Fiber-based DIAL Utilizing Wavelength Modulation for Laser Locking [PDF]

EPJ Web of Conferences
Recent advancements in Differential Absorption Lidar (DIAL) technology have led to the adoption of fully fiber-optic DIAL systems, offering superior robustness, reduced alignment sensitivity, and enhanced portability compared to traditional bulk-optic ...
Kikilich Nikita, Negre Erwan, Kalmankoski Kim, Akkala Aarni, Todt Michael, O'Connor Ewan, Toivonen Juha   +6 more
doaj   +1 more source

Enabling Technologies for Cross-Cutting Airborne and Spaceborne Water Vapor and Methane DIAL [PDF]

EPJ Web of Conferences
NASA Langley Research Center has developed the High-Altitude Lidar Observatory (HALO), a water vapor and methane Differential Absorption Lidar (DIAL) and High Spectral Resolution Lidar (HSRL) system to address the observational needs of weather, climate,
Nehrir Amin, Notari Anthony, Harper David, Barton-Grimley Rory, Antill Charles, Dostart Nathan, Fitzpatrick Fran, Burns Patrick, Sherman Jes, Kanskar Manoj, Welch Wayne, Sun Xiaoli, Collins James, Collister Brian, Lee Joe, Crosbie Ewan, Hair John   +16 more
doaj   +1 more source

Dial C for Cipher.

, 2007
We introduce C, a practical provably secure block cipher with a slow key schedule. C is based on the same structure as AES but uses independent random substitution boxes instead of a fixed one. Its key schedule is based on the Blum-Blum-Shub pseudo-random generator, which allows us to prove that all obtained security results are still valid when taking
Baignères, Thomas, Finiasz, Matthieu
openaire   +1 more source

An improved BRISK‐FREAK‐based algorithm combined with LSD algorithm for complex pointer meter identification

IET Science, Measurement & Technology
To locate and read the complex pointer meter dial for the images with uneven illumination, blurred dial, and tilted dial, this paper firstly proposes an improved BRISK‐FREAK algorithm for dial position. Then, combined with the Line Segment Detector (LSD)
Zhiniu Xu, Xiaonan Wu, Yuxuan Liu, Lina Zhao, Lijuan Zhao, Shipeng Song, Ruilei Cui   +6 more
doaj   +1 more source

Perceptual Sensitivity to Tactile Stimuli Is Enhanced When One Is Aware That Tactile Stimulus Intensity Is Self-Controlled

Brain Sciences
Background and objectives: This study aimed to investigate whether perceptual sensitivity to tactile stimulus is affected by awareness of who controls the stimulus intensity. Methods: Thirteen healthy participants took part in this study.
Hitoshi Oda, Shiho Fukuda, Hiroshi Kunimura, Taku Kawasaki, Han Gao, Moritaka Futamura, Koichi Hiraoka   +6 more
doaj   +1 more source

A positioning recognition method for SF6 pressure pointer meter

Diance yu yibiao
For SF6 pressure pointer meter with complex dial, internal mechanical components and short pointer, there is still a lack of a method of meter location identification with low computational cost and robustness and accuracy, which is suitable for poor ...
ZHAO Lina, ZHAO Lijuan, NING Zida, ZANG Yulai, XU Zhiniu   +4 more
doaj   +1 more source