Results 21 to 30 of about 376,527 (305)

Hydrodynamics of hybrid upflow anaerobic sludge blanket reactors using tracer studies

Environmental Challenges, 2021
The hybrid upflow anaerobic sludge blanket reactor (HUASB) is a modified UASB wherein, inert media variants are used to prevent the biomass washout and its circular shape reduces biological and hydraulic dead zone.
Bina Birenkumar Patel, Dr. Pradipkumar J. Gundaliya, Dr. Upendra D. Patel, Dr. Umeshkumar Khare   +3 more
doaj   +1 more source

A Novel IoT-Enabled Wireless Sensor Grid for Spatial and Temporal Evaluation of Tracer Gas Dispersion

Sensors, 2023
Current IoT applications in indoor air focus mainly on general monitoring. This study proposed a novel IoT application to evaluate airflow patterns and ventilation performance using tracer gas.
Tsz-Wun Tsang, Kwok-Wai Mui, Ling-Tim Wong, Kwok-Yung Law, Ka-Wing Shek   +4 more
doaj   +1 more source

Controls on boundary layer ventilation: Boundary layer processes and large-scale dynamics [PDF]

, 2010
Midlatitude cyclones are important contributors to boundary layer ventilation. However, it is uncertain how efficient such systems are at transporting pollutants out of the boundary layer, and variations between cyclones are unexplained. In this study 15
Adamson, Agustí-Panareda, Agustí-Panareda, Arya, Bethan, Bey, Browning, Carlson, Davies, Donnell, Eckhardt, Ekman, Esler, Farrell, Haltiner, Hannan, Harrold, Hess, Hess, Hines, Holton, Holtslag, Hoskins, Kowol-Santen, Lock, Polvani, Roe, Rotunno, S. E. Belcher, S. L. Gray, Shapiro, Simmons, Sinclair, Sinclair, Stull, Troen, V. A. Sinclair, Williams   +37 more
core   +1 more source

Imaging findings and clinical relevance of 68Ga-Pentixafor PET in atherosclerosis: a systematic review

BMC Medical Imaging, 2023
Objective We aimed to perform a qualitative synthesis of evidence on the role of 68Ga-Pentixafor PET in atherosclerosis. Methods A systematic search of the PubMed and Embase databases for studies reporting the evaluation of atherosclerotic lesions by ...
Min Wang, Jiayu Zhang, Jiao Ma, Liyi Liu, Jia Wang, Chunyin Zhang   +5 more
doaj   +1 more source

LIDT-DD: A new self-consistent debris disc model including radiation pressure and coupling collisional and dynamical evolution [PDF]

, 2013
In most current debris disc models, the dynamical and the collisional evolutions are studied separately, with N-body and statistical codes, respectively, because of stringent computational constraints.
Charnoz, Sébastien, Kral, Quentin, Thébault, Philippe   +2 more
core   +5 more sources

Explicit measurement of multi-tracer arterial input function for PET imaging using blood sampling spectroscopy

EJNMMI Physics, 2020
Background Conventional PET imaging has usually been limited to a single tracer per scan. We propose a new technique for multi-tracer PET imaging that uses dynamic imaging and multi-tracer compartment modeling including an explicitly derived arterial ...
Carlos Velasco, Adriana Mota-Cobián, Jesús Mateo, Samuel España   +3 more
doaj   +1 more source

Apportionment of primary and secondary organic aerosols in Southern California during the 2005 Study of Organic Aerosols in Riverside (SOAR-1) [PDF]

, 2008
Ambient sampling was conducted in Riverside, California during the 2005 Study of Organic Aerosols in Riverside to characterize the composition and sources of organic aerosol using a variety of state-of-the-art instrumentation and source apportionment ...
DeCarlo, Peter F., Docherty, Kenneth S., Eatough, Delbert J., Grover, Brett D., Jimenez, Jose L., Murphy, Shane M., Peltier, Richard E., Schauer, James J., Seinfeld, John H., Snyder, David C., Stone, Elizabeth A., Ulbrich, Ingrid M., Weber, Rodney J.   +12 more
core   +2 more sources

Development of mathematical methods for processing tracer studies of wells [PDF]

E3S Web of Conferences
The use of tracer methods for studying oil wells makes it possible to determine the efficiency of oil field development. However, the reliability of the results of such studies largely depends on both the correctly selected indicators and the methods of ...
Tiutiaev Andrei, Kashaev Denis, Makarov Yuriy, Makarov Dmitriy, Dolzhikov Andrei   +4 more
doaj   +1 more source

Tracer tests in geothermal resource management

EPJ Web of Conferences, 2013
Geothermal reinjection involves injecting energy-depleted fluid back into geothermal systems, providing an effective mode of waste-water disposal as well as supplementary fluid recharge.
Axelsson G.
doaj   +1 more source

Modeling Long-Distance Forward and Backward Diffusion Processes in Tracer Transport Using the Fractional Laplacian on Bounded Domains

Fractal and Fractional, 2023
Recent studies have emphasized the importance of the long-distance diffusion model in characterizing tracer transport occurring within both subsurface and surface environments, particularly in heterogeneous systems.
Zhipeng Li, Hongwu Tang, Saiyu Yuan, Huiming Zhang, Lingzhong Kong, HongGuang Sun   +5 more
doaj   +1 more source