Abstract
The innovation method TRIZ is an innovative methodology that can analyze problems and solve them and has been widely used in many fields. In this paper, TRIZ theory is applied to optimize ...the design of the electromagnetic interference (EMI) problem of a model of LED lamps and lanterns switching power supply. The tools of resource analysis, component analysis, functional analysis, and cause-effect analysis are used to analyze the problem of excessive EMI encountered in the design of LED lamps and lanterns, and the tools of technical contradiction and material field analysis are used to improve the problem of reducing EMI. Two solutions are obtained to improve the problem of high EMI by changing the Power inductor design method of the input voltage and by adding capacitors to form a Π-type filter circuit.
Fairy lanterns (Thismia Griff.) is a genus of poorly known mycoheterotrophic plants with unclear infrageneric classification. Commonly used approaches that utilize just a single or few traits in ...higher-level taxonomy lead to an apparently artificial system. In this contribution, four new species from Sarawak, northern Borneo, are described and illustrated. Thismia acuminata, T. laevis and T. nigra belong undoubtedly to section Sarcosiphon. Thismia viridistriata exhibits a high morphological variability with some individuals fitting section Scaphiophora based on the presence of a column on the top of the mitre, but otherwise perfectly matching the morphological characteristic of section Sarcosiphon. Five-locus (SSU, ITS, LSU, matR, atpA) phylogeny inference revealed paraphyly or polyphyly in the studied infrageneric taxa and showed that the importance of some traits traditionally used in Thismia taxonomy was overestimated. Most of the markers provide comparable phylogenetic signal; LSU performs best and is highly recommended for further phylogenetic studies. On the other hand, ITS is hypervariable and thus informative only within (sub)sections, as well as on intraspecific level, as proven in T. viridistriata with two distinct ITS (and also LSU and matR) alleles and two morphotypes within a small geographic area, which leads to an assumption of strong reproductive isolation even among nearby populations. For delimitation of species, the key trait appears to be the structure of the connective and any of the molecular markers used here.
The nightshade family Solanaceae holds exceptional economic and cultural importance. The early diversification of Solanaceae is thought to have occurred in South America during its separation from ...Gondwana, but the family’s sparse fossil record provides few insights. We report 52.2-million-year-old lantern fruits from terminal-Gondwanan Patagonia, featuring highly inflated, five-lobed calyces, as a newly identified species of the derived, diverse New World genus Physalis (e.g., groundcherries and tomatillos). The fossils are considerably older than corresponding molecular divergence dates and demonstrate an ancient history for the inflated calyx syndrome. The derived position of these early Eocene fossils shows that Solanaceae were well diversified long before final Gondwanan breakup.
Coherent Imaging with Photonic Lanterns Kim, Yoo Jung; Fitzgerald, Michael P.; Lin, Jonathan ...
The Astrophysical journal,
04/2024, Volume:
964, Issue:
2
Journal Article
Peer reviewed
Open access
Abstract Photonic lanterns (PLs) are tapered waveguides that gradually transition from a multimode fiber geometry to a bundle of single-mode fibers (SMFs). They can efficiently couple multimode ...telescope light into a multimode fiber entrance at the focal plane and convert it into multiple single-mode beams. Thus, each SMF samples its unique mode (lantern principal mode) of the telescope light in the pupil, analogous to subapertures in aperture masking interferometry (AMI). Coherent imaging with PLs can be enabled by the interference of SMF outputs and applying phase modulation, which can be achieved using a photonic chip beam combiner at the backend (e.g., the ABCD beam combiner). In this study, we investigate the potential of coherent imaging by the interference of SMF outputs of a PL with a single telescope. We demonstrate that the visibilities that can be measured from a PL are mutual intensities incident on the pupil weighted by the cross correlation of a pair of lantern modes. From numerically simulated lantern principal modes of a 6-port PL, we find that interferometric observables using a PL behave similarly to separated-aperture visibilities for simple models on small angular scales (< λ / D ) but with greater sensitivity to symmetries and capability to break phase angle degeneracies. Furthermore, we present simulated observations with wave front errors (WFEs) and compare them to AMI. Despite the redundancy caused by extended lantern principal modes, spatial filtering offers stability to WFEs. Our simulated observations suggest that PLs may offer significant benefits in the photon-noise-limited regime and in resolving small angular scales at the low-contrast regime.
Measurement of light pollution by using BSP Szczepańczyk, Andrzej; Macko, Marek; Lewandowski, Jakub
MATEC Web of Conferences,
2024, Volume:
391
Journal Article, Conference Proceeding
Peer reviewed
Open access
Light pollution is a common problem, especially in large agglomerations, where something still shines: lanterns, lights from windows, car lights, neon lights, advertisements, shop windows, there is ...no such important darkness anymore. The lack of blackout has a negative impact on all living organisms, from plants, through animals, and ending on humans (e.g. it affects the quality of sleep, disrupts the hormonal balance). The proposed solution concerns the measurement of the intensity of the so-called light-smog (light pollution), using an unmanned aerial vehicle (UAV / drone). This project is to help determine the scale of the problem, present it in numbers and provide the basis for improving the quality of life and health by reducing light smog.
The Spring Dunya Mikhail
World literature today,
02/2018, Volume:
92, Issue:
1
Journal Article
Peer reviewed
Iraqi-born writer Dunya Mikhail's forthcoming book, The Beekeeper: Rescuing the Stolen Women of Iraq, is dedicated to Abdullah Shrem, a young man from Sinjar, Iraq, who worked with smugglers to ...rescue dozens of his fellow Yazidis from ISIS captivity in Syria and Iraq between 2014 and 2016. Most of the book consists of horrific stories of Daesh brutality toward the Yazidi people, but t e following excerpt focuses on Mikhail's return to Iraq in 2016, where she met Abdullah in person.
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