1,720,993 research outputs found
Nanotechnology-based ozone sensors exploiting low-frequency impedance changes for detection
No full textScientific studies on pollutants and their health effects indicate that real-time monitoring of environmental triggers
can improve public health and reduce healthcare costs. This paper introduces sensitive detectors based on
functionalized single-walled carbon nanotubes (CNTs) to monitor ozone concentration at sub-ppm level. The CNTs were dispersed and sonicated into an ink formulation which was spray-coated onto interdigitated electrodes on a low-cost commercial substrate. The complex impedance of the sensor signal is measured in the laboratory at frequency between 1 kHz and 200 kHz using a benchtop Impedance Meter. Shunt conductance and capacitance extracted from these measurements on several ozone sensors reveal sensitivity of over 60% at room temperature below 50 kHz, and sensor retractability during desorption
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
An investigation on the tuning of a microstrip patch antenna using carbon nanotube thin films
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Extraction of rf permeability of ferrite materials using direct measurement of inductors on ferrite cores
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Antenna design strategies to reduce coupling and interference in wireless communications systems
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Closed-Form Design Formulas for the Equivalent Circuit Characterization of Ferrite Inductors
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