Results 41 to 50 of about 2,331,212 (353)
How Low Can It Go? ATR-FTIR Characterization of Compounds Isolated from Ginger at the Nanogram Level
Engineering Proceedings, 2023 This proof-of-concept study demonstrated the potential of attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy for the structural characterization of natural products when only very small quantities of the target compound are ...
Joel B. Johnson +3 more
doaj +1 more source
Detection-Response Task—Uses and Limitations [PDF]
Sensors, 2018 The Detection-Response Task is a method for assessing the attentional effects of cognitive load in a driving environment. Drivers are presented with a sensory stimulus every 3–5 s, and are asked to respond to it by pressing a button attached to their finger.
Stojmenova Pečečnik, Kristina +1 more
openaire +4 more sources
Estimating the resolution limit of the map equation in community detection
, 2015 A community detection algorithm is considered to have a resolution limit if the scale of the smallest modules that can be resolved depends on the size of the analyzed subnetwork.
Kawamoto, Tatsuro, Rosvall, Martin
core +2 more sources
A Reduced GO-Graphene Hybrid Gas Sensor for Ultra-Low Concentration Ammonia Detection
Sensors, 2018 A hybrid structure gas sensor of reduced graphene oxide (RGO) decorated graphene (RGO-Gr) is designed for ultra-low concentration ammonia detection. The resistance value of the RGO-Gr hybrid is the indicator of the ammonia concentration and controlled by
Chang Wang +7 more
doaj +1 more source
Stochastic Time Response and Ultimate Noise Performance of Adsorption-Based Microfluidic Biosensors
Biosensors, 2021 In order to improve the interpretation of measurement results and to achieve the optimal performance of microfluidic biosensors, advanced mathematical models of their time response and noise are needed. The random nature of adsorption–desorption and mass
Ivana Jokić +5 more
doaj +1 more source
Numerical Optical Centroid Measurements
, 2013 Optical imaging methods are typically restricted to a resolution of order of the probing light wavelength $\lambda_p$ by the Rayleigh diffraction limit. This limit can be circumvented by making use of multiphoton detection of correlated $N$-photon states,
Evers, Jörg, Gulfam, Qurrat-ul-Ain
core +1 more source
ORT observations of the damped Lyman alpha system towards PKS 0201+113
, 1997 We report a deep radio search with the Ooty Radio Telescope (ORT) for the redshifted 21 cm absorption line from the damped Lyman alpha system seen at redshift 3.388 against the quasar PKS 0201+113.
Chengalur, Jayaram N, Kanekar, Nissim
core +1 more source
Yankuang ceshi, 2018 Carbon and nitrogen isotopes are essential tools to study paleoclimate, palaeoenvironment, and ecosystem. At present, carbon and nitrogen isotopes are commonly determined by Elemental Analyzer-Isotope Ratio Mass Spectrometer (EA-IRMS).
XU Li +4 more
doaj +1 more source
Network topology drives population temporal variability in experimental habitat networks
Population Ecology, EarlyView.Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu +3 more
wiley +1 more source
Mixed models for longitudinal left-censored repeated measures
, 2004 Longitudinal studies could be complicated by left-censored repeated measures. For example, in Human Immunodeficiency Virus infection, there is a detection limit of the assay used to quantify the plasma viral load.
Genz +18 more
core +3 more sources