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Journal articles on the topic 'Dark zone'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Leavy, Olive. "Illuminating the dark zone." Nature Reviews Immunology 11, no. 1 (2010): 8. http://dx.doi.org/10.1038/nri2906.

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2

Scanlon, Seth Thomas. "Light- and dark-zone death dynamics." Science 358, no. 6360 (2017): 183.9–185. http://dx.doi.org/10.1126/science.358.6360.183-i.

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3

Cabili, Michael Henry D., and Olga M. Nuñeza. "Species diversity of cave-dwelling spiders on Siargao island, Philippines." International Journal of Plant, Animal and Environmental Sciences 4, no. 2 (2014): 392–99. https://doi.org/10.5281/zenodo.8188619.

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Siargao Island is home to many caves that are interesting habitats because of their extreme environments. Spiders that are good indicators of biodiversity are also known to be common cave dwellers. However, studies on cave spiders in Siargao Island are poorly known. This study was conducted to determine the species diversity of spiders in Siargao caves. Sampling was done through modified cruising method. Eight species belonging to six families were recorded in 10 caves sites of Siargao. Caves 1 and 4 where rich guano material was present had the highest species richness. The dark zone of these

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4

Dodonov, Pavel, Juliana Ribeirão de Freitas, Rogerio Franco Flores Tezori, and Maria Elina Bichuette. "In situ evaluation of the food input in the different zones of a cave: case study and methodological recommendations." Revista da Biologia 10, no. 2 (2018): 8–12. https://doi.org/10.11606/issn.1984-5154.v10p8-12.

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Due to the absence of light, cave environments are devoid of photosynthesizing organisms, and depend on the input of food from above ground. We compared the quantity of food available in the different zones of two caves in Serra da Canastra, MG. The amount of plant debris was highest in the entrance zone, intermediate in the twilight zone, and minimal in the dark zone. Guano was practically absent from the entrance zone, but did not present any clear pattern between the twilight and the dark zones. Therefore, plant debris seem to be more important in the entrance zone, and guano in deeper zone

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Muricy, Guilherme, Anaíra Lage, Joana Sandes, et al. "Sponge Communities of Submarine Caves and Tunnels on the Fernando de Noronha Archipelago, Northeast Brazil." Journal of Marine Science and Engineering 12, no. 4 (2024): 657. http://dx.doi.org/10.3390/jmse12040657.

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Submarine caves are important biodiversity reservoirs, but there is little information about the biota of marine caves in the Southwestern Atlantic. Here, we describe three submarine cavities and their sponge communities on the Fernando de Noronha Archipelago, Northeast Brazil. The underwater cavities were explored and collections were made through scuba diving from 5 to 18 m depths. Sapata Cave has a wide semi-dark zone near the entrance, a narrow transition zone, and a dark chimney, which is closed at the top. Ilha do Meio Cave is narrower and shallower than Sapata Cave, but has a long passa

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6

Glauber, Mattia, Antonio Lio, and Antonio Miceli. "The gray zone is always more dark." Journal of Thoracic and Cardiovascular Surgery 152, no. 1 (2016): 110–11. http://dx.doi.org/10.1016/j.jtcvs.2016.03.012.

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7

Olszewski, Adam J. "Meet the Burkitts: a dark zone family." Blood 141, no. 8 (2023): 816–18. http://dx.doi.org/10.1182/blood.2022018509.

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8

Cuff, Jordan P., Shlomi Aharon, Igor Armiach Steinpress, Merav Seifan, Yael Lubin, and Efrat Gavish-Regev. "It’s All about the Zone: Spider Assemblages in Different Ecological Zones of Levantine Caves." Diversity 13, no. 11 (2021): 576. http://dx.doi.org/10.3390/d13110576.

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Caves possess a continuum of ecological zones that differ in their microhabitat conditions, resulting in a gradient of nutrients, climate, and illumination. These conditions engender relatively rapid speciation and diverse assemblages of highly specialised spider fauna. It is unclear, however, how zonation of these caves affects spider assemblage composition and structure. Surveys of 35 Levantine caves were conducted to compare the assemblages of spiders between their different ecological zones. The diverse spider assemblages of these caves differed between the entrance, twilight, and dark zon

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9

Barahim, Adnan A., Khalid A. Al-Suba’i, and AbdulKarim S. Alburihi. "Geological engineering description of the exposed surface rocks in wadi Dawa’an, Hadramout Governorate, Republic of Yemen." University of Aden Journal of Natural and Applied Sciences 22, no. 1 (2018): 127–40. http://dx.doi.org/10.47372/uajnas.2018.n1.a10.

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The present study deals with engineering geological characteristics of the rock mass encountered in and on sides of Wadi Dawa'an, Hadramout governorate. During the present investigation, detailed studies were carried out on lithology, discontinuities, etc. and basic Geotechnical Description (BGD) of rock mass. The results revealed that, the Limestone (Umm erRhaduma Formation) has been classified into three zones (Zone I to Zone III), and the exposed parts of Sandstone (Mukalla Formation) into two zones (Zone I and Zone II). The Limestone (very steep cliff) varies from dark brown and moderately

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10

Lee, Jounghun, and Marco Baldi. "The impact of constrained interacting dark energy on the bound-zone velocity profile." Journal of Cosmology and Astroparticle Physics 2024, no. 09 (2024): 036. http://dx.doi.org/10.1088/1475-7516/2024/09/036.

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Abstract We numerically study the effects of constrained interacting dark energy (CIDER) on the bound-zone velocity profiles around massive dark matter halos. Analyzing the CIDER simulations performed by ref. [1] for three different cases of dark sector coupling (β = 0.03, 0.05 and 0.08) as well as for the standard ΛCDM cosmology (β = 0), we determine the mean peculiar velocity profiles in the bound zones around the friends-of-friends halos with masses larger than M cut = 3 × 1013 h-1 M ⊙ at three redshifts, z = 0, 0.5 and 1. It is found that the universal power-law formula proposed by ref. [2

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11

Parla, Jale. "Dark knowledge befits dark color: Turkish novelists interrogate the ideology of light." New Perspectives on Turkey 41 (2009): 9–42. http://dx.doi.org/10.1017/s0896634600005367.

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AbstractThe Republican discourse of progress has established a strong link between Turkey's modernization and the absolute power of light. As the Turkish word aydin (enlightened) replaced the Ottoman münevver (intellectual), the obligation to be enlightened along the dictates of Kemalist precepts became a national imperative. This over-valuation of light in the cultural and ideological spheres has provoked some Turkish novelists to interrogate the clichés of the symbolism of light versus dark, by obscuring their writing with the twilight colors of shadowy zones. Their texts challenge the reade

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12

KURNIAWAN, ISMA DWI, CAHYO RAHMADI, REZZY EKO CARAKA, and TIARA E. ARDI. "Short Communication: Cave-dwelling Arthropod community of Semedi Show Cave in Gunungsewu Karst Area, Pacitan, East Java, Indonesia." Biodiversitas Journal of Biological Diversity 19, no. 3 (2018): 857–66. http://dx.doi.org/10.13057/biodiv/d190314.

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Kurniawan ID, Rahmadi C, Caraka RE, Ardi TE. 2018. Short Communication: Cave-dwelling Arthropod community of Semedi Show Cave in Gunungsewu Karst Area, Pacitan, East Java, Indonesia. Biodiversitas 19: 857-866. Arthropods are a major group of animals which have significant roles in maintaining cave ecosystem stability. Semedi is a new show cave, but information about arthropods in this cave was not available. The use of cave as a tourist attraction will bring environmental changes which potentially disturb cave-dwelling arthropod community. This study aimed to measure arthropod diversity and th

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13

Meyer-Hermann, Michael, and Tilo Beyer. "Conclusions from Two Model Concepts on Germinal Center Dynamics and Morphology." Developmental Immunology 9, no. 4 (2002): 203–14. http://dx.doi.org/10.1080/1044-6670310001597060.

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Germinal centers (GC) are an essential part of the humoral immune response. They develop a clear structure during maturation: Centroblasts and centrocytes are separated into two zones, the dark and the light zone. The mechanisms leading to this specific morphology as well as the reason for zone-depletion during a later phase of the GC reaction have not clearly been revealed in experiment. We discuss and weigh possible mechanisms of dark and light zone development in the framework of two mathematical models. In a comparative approach we formulate constraints on typical lymphocyte velocities in

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14

Akbar, Rahmat Taufiq Mustahiq, Sella Nur Devi, Isma Dwi Kurniawan, Risda Arba Ulfa, and Adisty Virakawugi Darniwa. "Diversity of plankton in the waters of sanghyang kenit Rajamandala cave, Indonesia." Depik 12, no. 3 (2023): 291–301. http://dx.doi.org/10.13170/depik.12.3.32543.

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Sanghyang Kenit Cave is a cave that has an aquatic environment and a potential habitat for plankton. Plankton can be a bioindicator of water because of its sensitivity to the environment. The purpose of this study was to determine the diversity, interrelationship factors, and linkages of plankton with the environment in the waters of Sanghyang Kenit Rajamandala Cave, West Bandung. This research was conducted from August 2021 to September 2022. The study employed a purposive sampling method, identifying three sampling zones (The Light, Twilight, and Dark zones) during morning, afternoon, and ev

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15

Pribadi, Anggara Sakti, Muhammad R. Syahrir, and Ghitarina Ghitarina. "PRODUKSI DAN KONSUMSI OKSIGEN ZONA ATAS DAN BAWAH SECCHI DISK DI WADUK BENANGA SAMARINDA." Tropical Aquatic Sciences 1, no. 2 (2022): 7–15. http://dx.doi.org/10.30872/tas.v1i2.634.

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The high sedimentation and erosion in reservoirs in Indonesia have been the main factors causing the decrease in reservoir capacity. High sedimentation is the main factor causing the decline in the carrying capacity of the reservoir ecosystem. This research was conducted to determine the production of dissolved oxygen and respiration in the upper and lower zones of the sechi disk in the Benanga Reservoir. As data on dissolved oxygen production and respiration in the upper and lower zones of the secchi disk. This study uses a dark and light bottle storage method to see the difference between th

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16

Dunleavy, Kieron. "The dark zone of CNS relapse in DLBCL." Blood 145, no. 6 (2025): 552–54. https://doi.org/10.1182/blood.2024027329.

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17

Grossman, Lisa. "Nearby dark-matter-free zone poses cosmic conundrum." New Scientist 214, no. 2862 (2012): 6–7. http://dx.doi.org/10.1016/s0262-4079(12)61061-6.

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18

Modiano, S. H., and J. A. Vanderhoff. "Propellant dark zone concentrations via multichannel ir absorption." Symposium (International) on Combustion 26, no. 2 (1996): 2017–23. http://dx.doi.org/10.1016/s0082-0784(96)80025-7.

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19

Grebowicz, Margret. "Ecology after Dark." Minnesota review 2021, no. 96 (2021): 56–68. http://dx.doi.org/10.1215/00265667-8851520.

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This article takes its cue from Timothy Morton’s invitation to think all things in terms of radioactivity. Instead of focusing on objects, however, the author explores radiation in the imagination of animal desire in the nuclear dystopia. Her working hypothesis is that the Chernobyl Exclusion Zone—now an ecological reserve—is paradigmatic or symptomatic, a theater for the complicated libidinal architecture of the kinds of postapocalyptic sites that may in coming years become the primary places for charismatic megafauna to live, and in which conservation becomes the management not just of bodie

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20

Yan, Ning. "Review of dark matter and detect dark matter using collider." Theoretical and Natural Science 19, no. 1 (2023): 90–101. http://dx.doi.org/10.54254/2753-8818/19/20230503.

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This review study will give a brief introduction to dark matter, Large Hadron colliders (LHC), and circular electron-positron colliders(CEPC). The first part of the paper will discuss the fundamental properties of dark matter and the evidence for its existence. There will be a brief discussion of the theories used to explain dark matter. There will be three dark matter profiles and dark halo introductions. The basic configuration, ideas, and dark matter detection of LHC will then be covered in the study. The detection process includes missing momentum signals, bump hunting, and limiting the WI

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21

Siegers, Y., Rogier Reijmers, Natalie Papazian, and Tom Cupedo. "IL-22 receptor-expressing stromal cells are located in the germinal center dark zone (P1451)." Journal of Immunology 190, no. 1_Supplement (2013): 174.8. http://dx.doi.org/10.4049/jimmunol.190.supp.174.8.

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Abstract After antigen encounter and subsequent T cell-mediated B cell activation, germinal centers are formed within B cell follicles of lymph nodes giving rise to high affinity antibody secreting plasma cells and memory cells. Germinal centers are typically divided into a dark zone and light zone in which proliferation, class switching, affinity maturation and selection of B cells takes place. Stromal cells in the light zone are mainly follicular dendritic cells which are important in selection of high affinity B cells through presentation of immune complexes. On the other hand, dark zone st

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22

Huang, Yang, Sipei Zhao, and Jing Lu. "Acoustic contrast control with a sound intensity constraint for personal sound systems." Journal of the Acoustical Society of America 155, no. 2 (2024): 879–90. http://dx.doi.org/10.1121/10.0024617.

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Personal sound systems have received significant research interest in the past two decades due to their promising applications in a variety of scenarios. Various methods have been proposed to generate personal sound zones, most of which are based on sound pressure manipulation in both the acoustically bright and dark zones. Since sound intensity is closely related to human perception of sound localization, this paper proposes an acoustic contrast control method with a sound intensity constraint to increase the spatial planarity in the bright zone. In the proposed method, the sound intensity in

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23

Yankovska, Ganna, and Kevin Hannam. "Dark and toxic tourism in the Chernobyl exclusion zone." Current Issues in Tourism 17, no. 10 (2013): 929–39. http://dx.doi.org/10.1080/13683500.2013.820260.

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24

MacLennan, I. C. M. "Somatic Mutation: From the dark zone to the light." Current Biology 4, no. 1 (1994): 70–72. http://dx.doi.org/10.1016/s0960-9822(00)00017-8.

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25

Hsu, Sheng-Hsiang, Ko-Shao Chen, Hong-Ru Lin, Shu-Ju Chang, and Tzu-Piao Tang. "Effect of Plasma Gas Flow Direction on Hydrophilicity of Polymer by Small Zone Cold Plasma Treatment and Hydrophobic Plasma Treatment." International Journal of Distributed Sensor Networks 5, no. 5 (2009): 429–36. http://dx.doi.org/10.1080/15501320802473144.

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Plasma treatment is the most popular surface modification process of polymers. A small cold plasma zone treatment is an important modification technique in modern industry. In this study, the effect of gas flow direction on plasma treatment was investigated. In order to decrease the plasma zone area, we added a separate cylinder to surround the upper electrode. The separate cylinder is effective in limiting the plasma discharge area, and we could find a light and dark area in the vacuum chamber. After O2 plasma treatment, the result shows that only PP nonwoven in the discharge area became hydr

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26

Obando Hernandez, Edwin, Paul Hölscher, Pieter Doornenbal, Cees-jan Mas, Joost van ‘t Schip, and Agnes van Uitert. "Characterization of Shallow Ground in Railway Embankments Using Surface Waves Measured by Dark Fiber Optics Sensors: A Case Study." Sensors 23, no. 23 (2023): 9397. http://dx.doi.org/10.3390/s23239397.

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For the maintenance of railways on soft soils, accurate knowledge of the subsoil conditions is essential. Soft soils at shallow depths have high variability; thus, high spatial resolution is required. Spare telecommunication fiber-optic cables, known as dark fiber, can be used as an array of sensors to measure waves generated by running trains, which offers a unique opportunity to characterize shallow soils at high spatial resolution. We used dark fiber to measure seismic waves generated by running trains and implemented a seismic interferometry technique to retrieve surface waves. We evaluate

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27

DORMAAR, J. F. "EFFECT OF PLANT ROOTS ON CHEMICAL AND BIOCHEMICAL PROPERTIES OF SURROUNDING DISCRETE SOIL ZONES." Canadian Journal of Soil Science 68, no. 2 (1988): 233–42. http://dx.doi.org/10.4141/cjss88-023.

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The chemical and biochemical properties within and immediately adjacent to the root zone of two grass species were studied over a 5-wk period. The experiment utilized a simple container comprising five sandwiched compartments giving a center or "rhizosphere" zone, two intermediate zones, and two outer zones. Soil samples were taken from an Orthic Brown, Dark Brown, and Black Chernozemic Ah horizon and from the Orthic Dark Brown Chernozemic Ap horizons of the unfertilized part of a continuous wheat field and the fallow field of a wheat-fallow rotation, both under cultivation for 70 yr. The two

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Wen, Xin, Haijun Wu, Yilong Fan, and Weikang Jiang. "A multizone sound field reproduction method based on modal domain analysis." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 5 (2023): 3916–21. http://dx.doi.org/10.3397/in_2023_0559.

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Multizone sound field reproduction for synthesizing desired sound fields over multiple spatial zones has been widely studied. In the traditional multizone sound field reproduction modal domain method, the final loudspeaker weights required to reproduce the desired sound field are obtained by translating the optimal equivalent global modal domain coefficients, which is susceptible to the characteristics and location of the loudspeakers and reduces the reproduction performance. This paper investigates a multizone sound field reproduction in modal domain for directly obtaining the reproducing lou

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29

Wang, Lyuyuan, Jian Huang, Yong Peng, Yang Jia, and Rong Ni. "Influence of heat treatment on corrosion behavior of laser welded Mg-Gd-Y fusion zones." Anti-Corrosion Methods and Materials 67, no. 4 (2020): 337–43. http://dx.doi.org/10.1108/acmm-10-2019-2194.

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Purpose This paper aims to evaluate the corrosion resistance of fusion zones in different heat treated condition from laser welded Mg-Gd-Y alloys and analyze their intrinsic corrosion mechanism. Design/methodology/approach The corrosion behavior of fusion zone from laser-welded Mg-Gd-Y alloy joints in the as-welded, ageing and solution + ageing conditions was investigated in the 3.5 wt.% NaCl solution by immersion tests. Findings The corroded surface of as-welded fusion zone consists of dark and bright regions, and the bright regions were composed of high-density needle-like products, whereas

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30

Collinge, Brett, and David W. Scott. "What Is Dark Zone Lymphoma and Is It Clinically Relevant?" Clinical Lymphoma Myeloma and Leukemia 24 (September 2024): S121—S123. http://dx.doi.org/10.1016/s2152-2650(24)00372-0.

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31

Chodisetti, Sathi Babu, Adam Fike, Kristen Bricker, Phillip P. Domeier, Nicholas M. Choi, and Ziaur Rahman. "B cell-intrinsic STAT3 regulates the germinal center dark zone." Journal of Immunology 204, no. 1_Supplement (2020): 151.20. http://dx.doi.org/10.4049/jimmunol.204.supp.151.20.

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Abstract Germinal centers (GCs) are sites for antibody diversification, somatic hypermutation (SHM) and antigen specific B cell selection. GCs are anatomically divided into two distinct areas known as dark zone (DZ) and light zone (LZ) where SHM and clonal selection occurs, respectively. Although previous studies have suggested a B cell-intrinsic role of STAT3 in GC maintenance and antibody responses, how STAT3 signaling in B cells may maintain GCs for B cell selection is not clear. Using immunization and infection models, we show that STAT3 in B cells regulates the GC DZ, resulting in decreas

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32

Chen, Qing-Xiao, and Ying Han. "Retinal Adaptation in Response to Light and Dark Regimes in the Oriental Armyworm Mythimna separata (Lepidoptera: Noctuidae)." Insects 15, no. 2 (2024): 135. http://dx.doi.org/10.3390/insects15020135.

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The oriental armyworm, Mythimna separata (Walker), is a well-known nocturnal migratory pest that relies on its exceptional nocturnal vision for navigation during long-distance flights. In this study, we investigated the ultrastructure of the compound eyes of adult M. separata using transmission electron microscopy and quantitatively evaluated adaptational changes in the retina under light and dark conditions. The compound eyes of M. separata are superposition eyes with a clear zone. The retina shows remarkable anatomical differences under light and dark adaptation, primarily characterized by d

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33

Jones, Janet E., Philip Mellor, and Jesper Storm. "Limits on the Missing Mass in Dark Stellar Remnants." Symposium - International Astronomical Union 117 (1987): 411. http://dx.doi.org/10.1017/s0074180900150600.

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A set of comprehensive computer models for the chemical evolution of galaxies have been used to determine the limits on the amount of mass that could exist in the form of dark stellar remnants deriving from normal stellar evolutionary processes. In these models, the instantaneous recycling approximation is not assumed: stars are binned into 10 mass intervals, with different lifetimes, yields and remnant masses. The models were run using many different values for the IMF (including non-Salpeter and varying IMFs), star formation rates, yields, remnant masses, gas infall and outflow rates, primor

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34

Mudiantoro, Sunoto, Winarto Winarto, and Herry Oktadinata. "Microstructure Evolution and Distribution of Mechanical Properties in Shielded Metal Arc Welded Dissimilar DSS 2205 and HY80 Joints." MATEC Web of Conferences 269 (2019): 06004. http://dx.doi.org/10.1051/matecconf/201926906004.

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Dissimilar welding is a unique and complex process because in each zone in the different welding area have unique structures and characteristics. The modified structure may have a significant effect on weld metal properties. In this research, the primary objective is to investigate the microstructure evolution and hardness distribution mode of a different joint HY80 steel plate and Duplex type 2205 welded by using thick weld or shielded metal arc weld (SMAW). The microstructure of weld metal zones was observed. The test plates were welded in both butt joint and fillet joint by using E309L fill

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35

Kasatkin, A., О. Vereshchagin, L. Gorelova, and D. Belakovskiy. "Eight mineral species in one crystal: unique zonation of polychrome tourmaline from the Krutaya vein (Malkhan pegmatite feld, Transbaikalia, Russia)." МИНЕРАЛОГИЯ (MINERALOGY) 10, no. 2 (2024): 5–25. http://dx.doi.org/10.35597/2313-545x-2024-10-2-1.

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A unique unusually Mn-rich concentrically zoned polychrome crystal from the cavity of granite pegmatite of the Krutaya vein within the Malkhan pegmatite feld (Transbaikalia) is studied. It consists of six valid and two potentially new mineral species of the tourmaline supergroup. The paper provides the detailed physical, chemical and crystallographic characteristics of minerals. A Mn-richest (up to 9.6 wt. % MnO) dark brown core of the crystal is composed of fuor-tsilaisite, princivalleite and a Mn2+-F-analog of foitite. A greenish yellow intermediate zone consists of Mn-rich fuor-elbaite and

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Albright, Anne R., Juraj Kabat, Moyi Li, Fiona Raso, Andrea Reboldi та Jagan R. Muppidi. "TGFβ signaling in germinal center B cells promotes the transition from light zone to dark zone". Journal of Experimental Medicine 216, № 11 (2019): 2531–45. http://dx.doi.org/10.1084/jem.20181868.

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B cells in germinal centers (GCs) cycle between light zone (LZ) and dark zone (DZ). The cues in the GC microenvironment that regulate the transition from LZ to DZ have not been well characterized. In Peyer’s patches (PPs), transforming growth factor-β (TGFβ) promotes IgA induction in activated B cells that can then differentiate into GC B cells. We show here that TGFβ signaling occurs in B cells in GCs and is distinct from signaling that occurs in activated B cells in PPs. Whereas in activated B cells TGFβ signaling is required for IgA induction, in the GC it was instead required for the trans

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37

Gill, Lesley. "Intellectual labor in dark times." Focaal 2019, no. 84 (2019): 115–19. http://dx.doi.org/10.3167/fcl.2019.840109.

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The post–Great Recession, zombielike resurrection of neoliberalism has taken much of Europe and the United States on a hard-right detour into a twilight zone of populist nationalism, where far-right critiques of the status quo resonate more deeply with the white working class than leftist analyses. As rising fears of cultural eclipse, economic decline, and elite resentment drive the appeal of right-wing nationalists in the United States, Europe, India, and beyond, what role should intellectuals, and especially anthropologists, play in countering the creeping authoritarianism and growing inequa

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Wientjes, I. G. M., R. S. W. Van De Wal, M. Schwikowski, A. Zapf, S. Fahrni, and L. Wacker. "Carbonaceous particles reveal that Late Holocene dust causes the dark region in the western ablation zone of the Greenland ice sheet." Journal of Glaciology 58, no. 210 (2012): 787–94. http://dx.doi.org/10.3189/2012jog11j165.

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AbstractA dark region in the western ablation zone of the Greenland ice sheet is caused by outcropping ice layers that contain more dust than the surrounding brighter ice. These higher amounts of dust were deposited in the accumulation zone of the ice sheet and travelled with the ice to the ablation zone. To deduce the period and the causes of this higher dust deposition, carbonaceous particles in ice samples from the dark region and from brighter reference ice were analysed and used for dating. Samples including ice from directly below the surface contain high amounts of modern organic carbon

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Shailaja, P., D. Karuna Sagar Rao, and S. Venkateshwara Rao. "Studies On Point Spread Function With Three Zone Complex Pupil Function." IOSR Journal of Applied Physics 16, no. 5 (2024): 27–30. http://dx.doi.org/10.9790/4861-1605012730.

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The point spread function of a complex three-zone pupil function is analyzed in the presence of primary spherical aberration and defocus. The second zone is phase-shifted by -π/5, and the third zone by +π/7. Apodization is applied using three filters: a Bartlett amplitude filter for the inner zone, a shaded amplitude filter for the second zone, and a Hanning amplitude filter for the third zone. The primary goal is to enhance the central maximum's intensity, eliminate side lobes, and reduce the radius of the first dark ring. A notable increase in the central maximum occurs when the apodization

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Safronova, Irina, and Tatiana Yurkovsksya. "The latitudinal distribution of vegetation cover in Siberia." BIO Web of Conferences 16 (2019): 00047. http://dx.doi.org/10.1051/bioconf/20191600047.

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The latitudinal changes of vegetation cover on the plains of Siberia are observed. In Western Siberia there are 4 zones (tundra and taiga, and forest-steppe and steppe only here), in Central and North-Eastern Siberia − only 2 zones (tundra and taiga).Tundra zone is represented by 4 subzones in Central Siberia; in Western and North-Eastern Siberia − by 3 subzones (there are no polar subzone). All 5 subzones of the taiga zone are distinguished both in Western Siberia and in the Central Siberia, but in the Central Siberia, forests are found in very high latitudes. The feature of the taiga zone of

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PETRUKHINA, A. V., and M. M. ZAKIROVA. "INFLUENCE OF VARIETAL CHARACTERISTICS ON THE YIELD AND QUALITY OF SOME DARK-BERRY GRAPE VARIETIES IN THE NON-COVER ZONE IN THE CONDITIONS OF THE CENTRAL ZONE OF THE KRASNODAR REGION." Scientific Works of North Caucasian Federal Scientific Center of Horticulture Viticulture Wine-making 37 (September 2023): 54–57. http://dx.doi.org/10.30679/2587-9847-2023-37-54-57.

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The paper describes the results of research on the influence of varietal characteristics on the yield capacity and quality of some dark-berry grape varieties in the uncovered zone in the conditions of the Central zone of the Krasnodar region. Three dark-berry grape varieties have been studied: Kurchanskiy, Dmitriy, Vecherniy. During the research, the following tasks were performed: the yield capacity index, the average load of bunches on the bush, the mechanical structure of the bunch, the sugar content in the juice of berries of technical dark-berry grape varieties were determined. The most s

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Baranov, Dmitry S., Valery N. Zatelepin, Viktor A. Panchelyuga, and Alexander L. Shishkin. "Transfer of "dark hydrogen" by atomic matter. Methods of diagnostics of "dark hydrogen"." Radioelectronics. Nanosystems. Information Technologies. 13, no. 3 (2021): 319–28. http://dx.doi.org/10.17725/rensit.2021.13.319.

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This work experimentally shown that traces found on track detectors during the study of low-energy nuclear reactions are also formed in the course of many widely used technical processes (combustion of hydrocarbons, operation of internal combustion engines, physicochemical processes accompanying the process of charging smartphone batteries). This coincidence of the track pattern allows us to consider low-energy nuclear reactions as a significant environmental factor, and indicates the important role of “dark hydrogen” in nature. The paper shows the convective transfer of “dark hydrogen” from t

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Qiao, Yue, Léo Guadagnin, and Edgar Choueiri. "Isolation performance metrics for personal sound zone reproduction systems." JASA Express Letters 2, no. 10 (2022): 104801. http://dx.doi.org/10.1121/10.0014604.

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Two isolation performance metrics, inter-zone isolation (IZI) and inter-program isolation (IPI), are introduced for evaluating personal sound zone (PSZ) systems. Compared to the commonly used acoustic contrast metric, IZI and IPI are generalized for multichannel audio and quantify the isolation of sound zones and of audio programs, respectively. The two metrics are shown to be generally non-interchangeable and suitable for different scenarios, such as generating dark zones (IZI) or minimizing audio-on-audio interference (IPI). Furthermore, two examples with free-field simulations are presented

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Ryan, Michael, Sarah Shandera, James Gurian, and Donghui Jeong. "Molecular Chemistry for Dark Matter. III. DarkKROME." Astrophysical Journal 934, no. 2 (2022): 122. http://dx.doi.org/10.3847/1538-4357/ac75e5.

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Abstract Dark matter that is dissipative may cool sufficiently to form compact objects, including black holes. Determining the abundance and mass spectrum of those objects requires an accurate model of the chemistry relevant for the cooling of the dark matter gas. Here we introduce a chemistry tool for dark matter, DarkKROME, an extension of the KROME software package. DarkKROME is designed to include all atomic and molecular processes relevant for dark matter with two unequal-mass fundamental fermions, interacting via a massless-photon-mediated U(1) force. We use DarkKROME to perform one-zone

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Kleshcheva, Aleksandra. "Perception of Dark Tourism." Zeitschrift für Tourismuswissenschaft 13, no. 2 (2021): 191–208. http://dx.doi.org/10.1515/tw-2021-0014.

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Abstract In recent years, numerous studies have been conducted on the phenomenon of dark tourism. This study seeks to understand what motivates people to visit dark tourism sites such as the Chernobyl exclusion zone by applying an automated text analytics approach. Tripadvisor was chosen as a source for data collection as tourists are increasingly sharing their experiences and leave feedback online. Several natural language processing methods, such as topic modelling (LDA) and sentiment analysis, were applied to extract the primary motivators behind a visit to Chernobyl. Topic modelling result

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Mar’i, Husnul, Izmiarti Izmiarti, and Nofrita Nofrita. "Komunitas Makrozoobentos di Sungai Gua Pintu Ngalau pada Kawasan Karst di Sumatera Barat." JURNAL BIOLOGI UNAND 5, no. 1 (2018): 41. http://dx.doi.org/10.25077/jbioua.5.1.41-49.2017.

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Pintu Ngalau cave is flowed by river from irrigated rice fields that flows into the cave. This cave has a source of organic matter derived from bats and swallow dirts, litter that falls on enterance of the cave and the organic material carried by the flow of the river. The study on the macrozoobenthos communities of river in Pintu Ngalau Cave has been conducted from October until November 2016. The study used survey method, where stratified random sampling was applied in three zones (light zone, dim zone and dark zone) at study site. Macrozoobenthos samples was collected by surber net. This st

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Dominguez-Sola, David, Jennifer Kung, Antony B. Holmes, et al. "The FOXO1 Transcription Factor Instructs the Germinal Center Dark Zone Program." Immunity 43, no. 6 (2015): 1064–74. http://dx.doi.org/10.1016/j.immuni.2015.10.015.

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Bian, Lei, and Shaoqiang Tang. "Relay-Zone Technique for Numerical Boundary Treatments in Simulating Dark Solitons." Multiscale Science and Engineering 1, no. 3 (2019): 210–19. http://dx.doi.org/10.1007/s42493-018-00002-0.

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Cevallos-Ferriz, Sergio R. S., and Ruth A. Stockey. "Permineralized fruits and seeds from the Princeton chert (Middle Eocene) of British Columbia: Vitaceae." Canadian Journal of Botany 68, no. 2 (1990): 288–95. http://dx.doi.org/10.1139/b90-039.

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Four permineralized vitaceous seeds are described from the Middle Eocene Princeton chert, Allenby Formation, British Columbia. Three distinct types of ruminate perchalazal seeds are recognized, one is described as a new species Ampelocissus similkameenensis Cevallos-Ferriz et Stockey sp.nov., while the remaining seeds are referred to as type 1 and type 2 seeds. Five integumentary zones are recognized in each seed: zone 1 is an outer zone of thin-walled rectangular to polyhedral cells; zone 2 is a zone of thick-walled sclereids; zone 3 is a zone of cells with spiral thickenings; zone 4 is a zon

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Zhang, J. P. "Structures and defects identified by dark-field HREM." Proceedings, annual meeting, Electron Microscopy Society of America 50, no. 1 (1992): 124–25. http://dx.doi.org/10.1017/s0424820100121028.

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The tilted illumination dark field high resolution imaging technique was applied to structures and defects of semiconductors and superconductors. We used a Hitachi-H9000 top entry microscope with a high resolution pole-piece of Cs=0.9 mm, operated at 300 Kv. Proper apertures, tilting angle and imaging conditions were chosen to minimize the phase shift due to aberrations. Since the transmitted beam was moved outside the aperture, the noise ratio was greatly reduced, which resulted in a significant enhancement of image contrast and apparent resolution. Images are not difficult to interpret if th

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