A5056639851- Ichthyology and Marine Biology
- Identification and Quantification in Food
- Fish Biology and Ecology Studies
- Marine and fisheries research
- Planetary Science and Exploration
- Microwave Engineering and Waveguides
- Astro and Planetary Science
- Marine animal studies overview
- Coral and Marine Ecosystems Studies
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Space Exploration and Technology
- Electromagnetic Compatibility and Noise Suppression
- Fish Ecology and Management Studies
- Echinoderm biology and ecology
- Environmental DNA in Biodiversity Studies
- Pacific and Southeast Asian Studies
- Fish biology, ecology, and behavior
- Electromagnetic Compatibility and Measurements
- Genetic diversity and population structure
- Electromagnetic Simulation and Numerical Methods
- Gyrotron and Vacuum Electronics Research
- Genomics and Phylogenetic Studies
- Hydrocarbon exploration and reservoir analysis
- Isotope Analysis in Ecology
Smithsonian Institution
2012-2024
National Museum of Natural History
2014-2024
Brookhaven National Laboratory
2015-2023
Agricultural Research Service
2020-2021
National Animal Disease Center
2020-2021
George Washington University Hospital
2021
National Museum of Natural History
2020
John Wiley & Sons (United States)
2018-2019
Chevron (United States)
2018
Sandia National Laboratories
2017
Two variations of a circular microstrip patch design are presented which excite very little surface wave power. Both the designs based on principle that ring magnetic current in substrate (which models patches) will not dominant TM/sub 0/ if radius is particular critical value. Numerical results for radiation efficiency and radiated field strength from shown to verify this basic principle. The proposed chosen have equal value, while maintaining resonance at frequency. surface-wave power,...
Diversity in coral reef fishes is not evenly distributed and tends to accumulate the Indo-Malay-Philippines Archipelago (IMPA). The comprehension of mechanisms that initiated this pattern its infancy despite importance for conservation reefs. Considering IMPA either as an area overlap or a cradle marine biodiversity, hypotheses proposed account rely on extant knowledge about taxonomy species range distribution. recent large-scale use standard molecular data (DNA barcoding), however, has...
The design of a 1-D planar periodic combline leaky-wave antenna that avoids the open-stopband effects as beam is scanned through broadside discussed and verified experimentally. This radiates from nearly resonant stubs, which ensures small leakage constant hence high directivity, shows single scanning its n = -1 space harmonic in X-band frequency range. suppression obtained by applying recently proposed matching technique within unit cell experimentally validated here for first time....
Anthias albofasciatus Fowler & Bean, known only from the holotype collected east of Hong Kong in South China Sea, has been considered a valid species either or Pseudanthias. The is compared with Tosana niwae Smith Pope Urado Bay, Shikoku, Japan, as well non-type specimens Sea and south-eastern shown to be conspecific. therefore junior subjective synonym niwae.
The circuit and radiation properties of a cylindrical dielectric resonator antenna excited by coplanar waveguide feed are investigated. coupling between the radiator was measured as function position, constant, height cylinder. patterns resonant frequencies were also measured. These results found to be in good agreement with theoretical calculations.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
The far-field radiation patterns of a two-dimensional (2-D) periodic slot leaky-wave antenna (LWA) are studied. consists array slots in conducting plane that is printed on top grounded dielectric slab. excited by simple source such as dipole inside the Reciprocity along with spectral-domain method used to calculate pattern, and characteristics structure investigated. A comparison between present LWA 2-D patch discussed Part I given show advantages for certain applications. can achieve high...
The most abundant and problematic metal compounds in crude oil exist as organic complexes of vanadium nickel porphyrin structures derived from biological molecules (chlorophyll heme), the first petroleum biomarkers discovered by Alfred Treibs early 1930s.1 Detailed characterization type structure porphyrins is critical for development upgrading processes, but also to link source rock conditions. Because petroporphyrins concentrate heavy oils, direct challenges routine analytical techniques...
Abstract The Martian meteorites record a wide diversity of environments, processes, and ages. Much work has been done to decipher potential mantle sources for magmas their interactions with crustal surface environments. Chlorine isotopes provide unique opportunity assess between mantle‐derived the crust. We have measured Cl‐isotopic composition 17 samples that span range known ages, reservoirs. 37 Cl mantle, as represented by olivine‐phyric shergottites, NWA 2737 (chassignite), Shergotty...
Accurate identification of fishes is essential for understanding their biology and to ensure food safety consumers. DNA barcoding an important tool because it can verify identifications both whole processed that have had key morphological characters removed (e.g., filets, fish meal); however, reference libraries are incomplete, public repositories sequence data contain incorrectly identified sequences. During a nine-year sampling program in the Philippines, global biodiversity hotspot marine...
Abstract Highly siderophile elements ( HSE s) can be used to understand accretion and core formation in differentiated bodies, due their strong affinity for FeNi metal sulfides. Coupling experimental studies of metal–silicate partitioning with analyses contents Martian meteorites thus offer important constraints on the early history Mars. Here, we report new data PGE s Au Re across a wide range pressure temperature space, three series designed complement existing sets . The first examines...
Abstract We determined the chlorine isotope composition of 16 Martian meteorites using gas source mass spectrometry on bulk samples and in situ secondary ion microprobe analysis apatite grains. Measured δ 37 Cl values range from −3.8 to +8.6‰. The olivine‐phyric shergottites are isotopically lightest samples, with mostly ranging −4 −2‰. Samples evidence for a crustal component have positive values, an extreme value 8.6‰. Most basaltic intermediate −1 0‰, except Shergotty, which is similar...
A comparison is made of two different implementations the finite element method (FEM) for calculating potential due to dipole sources in electroencephalography (EEG). In one formulation (the direct method) total unknown that solved and source directly incorporated into model. second subtraction difference between same an infinite region homogeneous conductivity, corresponding where located. Both methods have FEM system matrix. However, requires additional calculation flux integrations along...
A new species of wrasse, Macropharyngodon pakoko, is described from the Marquesas Islands, bringing total number genus to 12. pakoko was found at depths 0-42 m and endemic Islands. similar M. meleagris, which widely distributed central western Pacific Cocos-Keeling in Indian Ocean, but differs genetically several coloration characters: males with irregularly curved black humeral blotch incomplete iridescent blue border; inverted irregular "U"- shaped band on cheek; a small spot upper base...
The emergence of DNA barcoding and metabarcoding opened new ways to study biological diversity, however, the completion barcode libraries is fundamental for such approaches succeed. This dataset a reference library (fragment Cytochrome Oxydase I gene) 2,190 specimens representing at least 540 species shore fishes collected over 10 years 154 sites across four volcanic archipelagos French Polynesia; Austral, Gambier, Marquesas Society Islands, 5,000,000 km
This paper presents a sensitivity study electroencephalography-based source localization due errors in the head-tissue conductivities and to modeling conductivity variation inside brain scalp. The is conducted using two-dimensional (2-D) finite element model obtained from magnetic resonance imaging (MRI) scan of head cross section. effect uncertainty following tissues studied: white matter, gray cerebrospinal fluid (CSF), skull, fat. distribution location errors, assuming single-dipole...
The optical transmission through a subwavelength hole in metal film is usually very small, and the beam radiated from its exit aperture broad. However, may be increased by orders of magnitude, output sharply narrowed, when tiny surrounded properly designed periodic structure, which take form an array grooves or indentations on surface. We have shown that these dramatic effects are due to excitation leaky surface plasmon mode structure film. Following this understanding, we introduce simple...
The use of high-throughput sequencing technologies to produce genome-scale data sets was expected settle some long-standing controversies across the Tree Life, particularly in areas where short branches occur at deep timescales. Instead, these have often yielded many well-supported but conflicting topologies, and highly variable gene-tree distributions. A variety branch-support metrics beyond nonparametric bootstrap are now available assess how robust a phylogenetic hypothesis may be, as...
A newly discovered leaky dominant mode is reported for conventional microstrip line on an isotropic substrate, at higher frequencies. The existence of this has been confirmed both numerically and experimentally. This new exists independently of, in addition to, the customary bound mode. It leaks power away from into fundamental TM/sub 0/ surface wave surrounding grounded may therefore be responsible spurious circuit performance could have important implications millimeter-wave circuits.
Biodiversity surveys were conducted on Saba Bank, Netherlands Antilles, to assess ichthyofaunal richness and compare with published of other Caribbean localities. The primary objective was estimate the total species Bank ichthyofauna. A variety sampling techniques utilized survey fish both visually accessible megafauna camouflaged small-sized comprising cryptic Based results presented herein, number known is increased from 42 previously 270 species. Expected species-accumulation curves...