Results 101 to 110 of about 20,247 (218)
Earth's Future, Volume 14, Issue 2, February 2026.Abstract Mountain grasslands are vital ecosystems providing critical services such as carbon sequestration, water regulation, and biodiversity conservation. However, these ecosystems are increasingly threatened by climate change and human activities. This study evaluates vegetation dynamics in global mountain grasslands (2000–2021) using remote sensing
Mulun Na, Giulia Zuecco, Paolo Tarolli
wiley +1 more source
MIDAS: Automated Approach to Design Microwave Integrated Inductors and Transformers on Silicon [PDF]
, 2013 The design of modern radiofrequency integrated circuits on silicon operating at microwave and millimeter-waves requires the integration of several spiral inductors and transformers that are not commonly available in the process design-kits of the ...
Alimenti, F. +4 more
core +1 more source
, 2008 This paper introduces simple analytical formulas for the grid impedance of electrically dense arrays of square patches and for the surface impedance of high-impedance surfaces based on the dense arrays of metal strips or square patches over ground planes.
Goussetis, George +6 more
core +1 more source
Yagi-Uda Antenna for Navigational Aids Using HFSS
Indonesian Journal of Electrical Engineering and Computer Science, 2017 <p>In this paper, the ultra high frequency of yagi-uda antenna for navigational has been designed to improve the usable bandwidth by improving the stability of the radiation patterns. The frequency band of ultra high frequency is 300-3000 MHZ. The main aim of this paper is to reduce the loss, improve the gain and also to enhance the efficiency of
Ramesh P., V. Mathivanan
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Prognostic utility of the MECKI score in a mixed United States cohort
Physiological Reports, Volume 14, Issue 3, February 2026.Abstract The Metabolic Exercise test data combined with Cardiac and Kidney Indexes (MECKI) score has demonstrated prognostic utility in European and Asian cohorts with heart failure with reduced ejection fraction (HFrEF). We sought to evaluate its performance in an American cohort.
Adarsh Mallepally +9 more
wiley +1 more source
Discovery of a Rich Population of Compact Hub-filament Systems in a Single Star-forming Complex
The Astronomical JournalWe report the discovery of 45 compact hub-filament systems (HFSs; median size ∼2.4 pc) in infrared-dark clouds (IRDCs) in the W33 complex, located at the junction of the Scutum and Norma spiral arms.
L. K. Dewangan +6 more
doaj +1 more source
Rigorous Analytical Model for Metasurface Microscopic Design with Interlayer Coupling
, 2019 We present a semianalytical method for designing meta-atoms in multilayered metasurfaces (MSs), relying on a rigorous model developed for multielement metagratings.
Epstein, Ariel +2 more
core +1 more source
Design of Wideband Antenna for Millimeter Waves Using HFSS
International Journal for Research in Applied Science and Engineering Technology, 2021 This paper reviews the objectives and requirements of wideband antenna for millimeter-wave applications using HFSS software (Ansys HFSS V.15.0). In modern era, all wireless devices are multipurpose and versatile, so this requires a wideband antenna to perform different tasks.
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Study On Waveguide Slots Using Hfss
, 2017 In this paper we present the design of WR975 waveguide using HFSS simulation software. The slot present in the wave guide will cause the waveguide to radiate and act as an antenna. Another slot is also kept to check the results with a single slot and compared.
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