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Journal articles on the topic 'Semi-conducteur à large bande'

Author: Grafiati

Published: 27 July 2024

Last updated: 31 July 2025

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1

Baili, G., M. Alouini, D. Dolfi, and F. Bretenaker. "Laser semi-conducteur de classe A et de très faible bruit sur une large bande passante." Journal de Physique IV (Proceedings) 135, no. 1 (2006): 165–66. http://dx.doi.org/10.1051/jp4:2006135042.

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Naudan, F., C. Nicolas, and J. P. Huignard. "Filtrage des modes latéraux d'un laser semi-conducteur à cavité large par rétroinjection conjuguée." Annales de Physique 20, no. 5-6 (1995): 599–600. http://dx.doi.org/10.1051/anphys:199556030.

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3

Pan, Hengxing, Danail Obreschkow, Cullan Howlett, et al. "Multiwavelength consensus of large-scale linear bias." Monthly Notices of the Royal Astronomical Society 493, no. 1 (2020): 747–64. http://dx.doi.org/10.1093/mnras/staa222.

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ABSTRACT We model the large-scale linear galaxy bias bg(x, z) as a function of redshift z and observed absolute magnitude threshold x for broad-band continuum emission from the far-infrared to ultraviolet, as well as for prominent emission lines, such as the H α, H β, Ly a, and [O ii] lines. The modelling relies on the semi-analytic galaxy formation model galform, run on the state-of-the-art N-body simulation surfs with the Planck 2015 cosmology. We find that both the differential bias at observed absolute magnitude x and the cumulative bias for magnitudes brighter than x can be fitted with a

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Sloan, G. C., K. E. Kraemer, B. Aringer, et al. "Temporal Changes in the Infrared Spectra of Magellanic Carbon Stars." Galaxies 12, no. 5 (2024): 61. http://dx.doi.org/10.3390/galaxies12050061.

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A Medium-Resolution Spectrometer on a Mid-Infrared Instrument on the JWST obtained spectra of three carbon stars in the Large Magellanic Cloud. Two of the spectra differ significantly from spectra obtained ∼16–19 years earlier with the Infrared Spectrograph on the Spitzer Space Telescope. The one semi-regular variable among the three has changed little. The long-period Mira variable in the sample shows changes consistent with its pulsation cycle. The short-period Mira shows dramatic changes in the strength of its molecular absorption bands, with some bands growing weaker and some stronger. Whe

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Partamies, Noora, James M. Weygand, and Liisa Juusola. "Statistical study of auroral omega bands." Annales Geophysicae 35, no. 5 (2017): 1069–83. http://dx.doi.org/10.5194/angeo-35-1069-2017.

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Abstract. The presence of very few statistical studies on auroral omega bands motivated us to test-use a semi-automatic method for identifying large-scale undulations of the diffuse aurora boundary and to investigate their occurrence. Five identical all-sky cameras with overlapping fields of view provided data for 438 auroral omega-like structures over Fennoscandian Lapland from 1996 to 2007. The results from this set of omega band events agree remarkably well with previous observations of omega band occurrence in magnetic local time (MLT), lifetime, location between the region 1 and 2 field-a

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Marcati, Carmen Regina, Veronica Angyalossy, and Ray Franklin Evert. "SEASONAL VARIATION IN WOOD FORMATION OF CEDRELA FISSILIS (MELIACEAE)." IAWA Journal 27, no. 2 (2006): 199–211. http://dx.doi.org/10.1163/22941932-90000149.

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Cambial activity and periodicity of secondary xylem formation in Cedrela fissilis, a semi-ring-porous species, were studied. Wood samples were collected periodically from 1996 to 2000. The phenology was related to climate data of the region. The cambium has one active and one dormant period per year. The active period coincides with the wet season when trees leaf-out. The dormant period coincides with the dry season when trees lose their leaves. Growth rings are marked by parenchyma bands that begin to be formed, together with the small latewood vessels, just before the cambium becomes dormant

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Rahimi, Iraj, Lia Duarte, Wafa Barkhoda, and Ana Cláudia Teodoro. "Comparative Analysis of Non-Negative Matrix Factorization in Fire Susceptibility Mapping: A Case Study of Semi-Mediterranean and Semi-Arid Regions." Land 14, no. 7 (2025): 1334. https://doi.org/10.3390/land14071334.

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Semi-Mediterranean (SM) and semi-arid (SA) regions, exemplified by the Kurdo-Zagrosian forests in western Iran and northern Iraq, have experienced frequent wildfires in recent years. This study proposes a modified Non-Negative Matrix Factorization (NMF) method for detecting fire-prone areas using satellite-derived data in SM and SA forests. The performance of the proposed method was then compared with three other already proposed NMF methods: principal component analysis (PCA), K-means, and IsoData. NMF is a factorization method renowned for performing dimensionality reduction and feature extr

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Li, Zongrui, Jun Pan, Zhuoer Zhang, Mi Wang, and Likun Liu. "MTCSNet: Mean Teachers Cross-Supervision Network for Semi-Supervised Cloud Detection." Remote Sensing 15, no. 8 (2023): 2040. http://dx.doi.org/10.3390/rs15082040.

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Cloud detection methods based on deep learning depend on large and reliable training datasets to achieve high detection accuracy. There will be a significant impact on their performance, however when the training data are insufficient or when the label quality is low. Thus, to alleviate this problem, a semi-supervised cloud detection method, named the mean teacher cross-supervision cloud detection network (MTCSNet) is proposed. This method enforces both consistency and accuracy on two cloud detection student network branches, which are perturbed with different initializations, for the same inp

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Cabrera, Densil, Shuai Lu, Jonothan Holmes, and Manuj Yadav. "Sound Reflections in Indian Stepwells: Modelling Acoustically Retroreflective Architecture." Acoustics 4, no. 1 (2022): 227–47. http://dx.doi.org/10.3390/acoustics4010014.

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Retroreflection is rarely used as a surface treatment in architectural acoustics but is found incidentally with building surfaces that have many simultaneously visible concave right-angle trihedral corners. Such surfaces concentrate reflected sound onto the sound source, mostly at high frequencies. This study investigated the potential for some Indian stepwells (stepped ponds, known as a kund or baori/baoli in Hindi) to provide exceptionally acoustically retroreflective semi-enclosed environments because of the unusually large number of corners formed by the steps. Two cases—Panna Meena ka Kun

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Ayres, J. F., R. D. Murison, A. D. Turner, and S. Harden. "A rapid semi-quantitative procedure for screening hydrocyanic acid in white clover (Trifolium repens L.)." Australian Journal of Experimental Agriculture 41, no. 4 (2001): 515. http://dx.doi.org/10.1071/ea97069.

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The presence of cyanogenic glucosides in white clover (Trifolium repens L.) is an anti-nutritional factor due to the potential for cyanide to pre-dispose selenium deficiency in grazing animals. Considerable genotypic variation in cyanogenesis occurs in white clover and it is important that highly cyanogenic white clover lines are identified to ensure that germpasm used in breeding programs does not lead to the release of cultivars that exceed safe levels. A procedure for rapid semi-quantitative screening of large white clover germplasm collections is described. This procedure is based on the p

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Dagbovie, Ayawoa S., and Jonathan A. Sherratt. "Pattern selection and hysteresis in the Rietkerk model for banded vegetation in semi-arid environments." Journal of The Royal Society Interface 11, no. 99 (2014): 20140465. http://dx.doi.org/10.1098/rsif.2014.0465.

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Banded vegetation is a characteristic feature of semi-arid environments. It occurs on gentle slopes, with alternating stripes of vegetation and bare ground running parallel to the contours. A number of mathematical models have been proposed to investigate the mechanisms underlying these patterns, and how they might be affected by changes in environmental conditions. One of the most widely used models is due to Rietkerk and co-workers, and is based on a water redistribution hypothesis, with the key feedback being that the rate of rainwater infiltration into the soil is an increasing function of

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Oliveira Santos, Victor, Bruna Monallize Duarte Moura Guimarães, Iran Eduardo Lima Neto, et al. "Chlorophyll-a Estimation in 149 Tropical Semi-Arid Reservoirs Using Remote Sensing Data and Six Machine Learning Methods." Remote Sensing 16, no. 11 (2024): 1870. http://dx.doi.org/10.3390/rs16111870.

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It is crucial to monitor algal blooms in freshwater reservoirs through an examination of chlorophyll-a (Chla) concentrations, as they indicate the trophic condition of these waterbodies. Traditional monitoring methods, however, are expensive and time-consuming. Addressing this hindrance, we conducted a comprehensive investigation using several machine learning models for Chla modeling. To this end, we used in situ collected water sample data and remote sensing data from the Sentinel-2 satellite, including spectral bands and indices, for large-scale coverage. This approach allowed us to conduct

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Булахтина, Галина Константиновна, Наталья Ивановна Кудряшова, Юрий Николаевич Подопригоров, and Андрей Алексеевич Хюпинин. "MELIORATIVE ROLE OF SHRUB PROTECTIVE BANDS IN SEMI-EMPTY PASTURES OF NORTHERN CASPIAN SEA REGION." Вестник Бурятской государственной сельскохозяйственной академии имени В. Р. Филиппова, no. 1(58) (March 24, 2020): 73–79. http://dx.doi.org/10.34655/bgsha.2020.58.1.011.

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Современные Прикаспийские степи в большинстве своем представлены деградированными фитоценозами, образованными аридным климатом и круглогодичным выпасом большого количества скота. Нарушение динамического равновесия этих полупустынных экосистем требует поиска путей рекультивации и ресурсосберегающего использования. Один из способов решения этой проблемы - создание на пастбищах мелиоративных кустарниковых защитных насаждений, которые сами также являются дополнительным кормом для выпасающихся животных. Данные исследования были направлены на определение мелиоративной эффективности защитных полос с

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Pereira-Pires, João E., Valentine Aubard, Rita A. Ribeiro, José M. Fonseca, João M. N. Silva, and André Mora. "Semi-Automatic Methodology for Fire Break Maintenance Operations Detection with Sentinel-2 Imagery and Artificial Neural Network." Remote Sensing 12, no. 6 (2020): 909. http://dx.doi.org/10.3390/rs12060909.

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The difficult job of fighting fires and the nearly impossible task to stop a wildfire without great casualties requires an imperative implementation of proactive strategies. These strategies must decrease the number of fires, the burnt area and create better conditions for the firefighting. In this line of action, the Portuguese Institute of Nature and Forest Conservation defined a fire break network (FBN), which helps controlling wildfires. However, these fire breaks are efficient only if they are correctly maintained, which should be ensured by the local authorities and requires verification

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DE, P., S. Bhakat, and A. K. Sinha. "Redescription of Oligodon arnensis, Shaw, 1802 (Reptilia: Colubridae) collected from Birbhum, West Bengal, India." Indian Journal of Pharmaceutical and Biological Research 6, no. 01 (2018): 42–47. http://dx.doi.org/10.30750/ijpbr.6.1.7.

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Oligodon arnensis, Shaw, 1802 commonly known as kukri snake, a semi- fossorial snake species is taken for study as it is a most challenging group of snake. A morphometric study on several aspects like the number of supra-labials , infra-labials, ventrals, dorsals, distance between eye to nostril, eye diameter, number of bands, shape of banding etc. are reported. A significant correlation is present in between snout-vent length and tail length and in between eye diameter and distance from eye to nostril a possible explanation of large eye size related to habitat is given in the study.

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Marcati, Carmen Regina, Leandro Roberto Longo, Alex Wiedenhoeft, and Claudia Franca Barros. "Comparative wood anatomy of root and stem of Citharexylum myrianthum (Verbenaceae)." Rodriguésia 65, no. 3 (2014): 567–76. http://dx.doi.org/10.1590/2175-7860201465301.

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Root and stem wood anatomy of C. myrianthum (Verbenaceae) from a semideciduous seasonal forest in Botucatu municipality (22º52’20”S and 48º26’37”W), São Paulo state, Brazil, were studied. Growth increments demarcated by semi-ring porosity and marginal bands of axial parenchyma were observed in the wood of both root and stem. Many qualitative features were the same in both root and stem: fine helical thickenings, and simple and multiple perforation plates in vessel elements; large quantities of axial parenchyma in the growth rings, grading from marginal bands and confluent forming irregular ban

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Jiang, Fugen, Andrew R. Smith, Mykola Kutia, Guangxing Wang, Hua Liu, and Hua Sun. "A Modified KNN Method for Mapping the Leaf Area Index in Arid and Semi-Arid Areas of China." Remote Sensing 12, no. 11 (2020): 1884. http://dx.doi.org/10.3390/rs12111884.

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As an important vegetation canopy parameter, the leaf area index (LAI) plays a critical role in forest growth modeling and vegetation health assessment. Estimating LAI is helpful for understanding vegetation growth and global ecological processes. Machine learning methods such as k-nearest neighbors (kNN) and random forest (RF) with remote sensing images have been widely used for mapping LAI. However, the accuracy of mapping LAI in arid and semi-arid areas using these methods is limited due to remote and large areas, the high cost of collecting field data, and the great spatial variability of

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Sherratt, Jonathan A. "Pattern solutions of the Klausmeier model for banded vegetation in semi-arid environments II: patterns with the largest possible propagation speeds." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 467, no. 2135 (2011): 3272–94. http://dx.doi.org/10.1098/rspa.2011.0194.

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Pattern formation at the ecosystem level is a rapidly growing area of spatial ecology. The best studied example is vegetation stripes running along contours in semi-arid regions. Theoretical models are a widely used tool for studying these banded vegetation patterns, and one important model is the system of advection–diffusion equations proposed by Klausmeier. The present study is part of a series of papers whose objective is a comprehensive understanding of patterned solutions of the Klausmeier model. The author focuses on the region of parameter space in which the propagation speed of the pa

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Schulze-Brüninghoff, Damian, Michael Wachendorf, and Thomas Astor. "Potentials and Limitations of WorldView-3 Data for the Detection of Invasive Lupinus polyphyllus Lindl. in Semi-Natural Grasslands." Remote Sensing 13, no. 21 (2021): 4333. http://dx.doi.org/10.3390/rs13214333.

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Semi-natural grasslands contribute highly to biodiversity and other ecosystem services, but they are at risk by the spread of invasive plant species, which alter their habitat structure. Large area grassland monitoring can be a powerful tool to manage invaded ecosystems. Therefore, WorldView-3 multispectral sensor data was utilized to train multiple machine learning algorithms in an automatic machine learning workflow called ‘H2O AutoML’ to detect L. polyphyllus in a nature protection grassland ecosystem. Different degree of L. polyphyllus cover was collected on 3 × 3 m2 reference plots, and m

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Norman, AB, JC Caudle, and CW Henderson. "Measurement of Gas Diffusion Capacity of Cigarette Papers." Beiträge zur Tabakforschung International/Contributions to Tobacco Research 21, no. 8 (2005): 425–34. http://dx.doi.org/10.2478/cttr-2013-0810.

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AbstractApparatus suitable for measuring gas diffusion capacity of cigarette paper was assembled and evaluated. The apparatus provides semi-automated means for measuring the concentration of carbon dioxide diffusing through a small area of the paper, and computation of a paper thickness-dependent diffusion capacity of the sample. Measurements are rapid and can be made in about 30 s. Diffusion capacity measurements were repeatable and reproducible to within about 1%. Variability of the diffusion capacity values was much lower than that observed for permeability measurements. For these reasons,

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Fujimoto, Takaaki, Hiroyuki Yamamoto, and Satoru Tsuchikawa. "Estimation of Wood Stiffness and Strength Properties of Hybrid Larch by Near-Infrared Spectroscopy." Applied Spectroscopy 61, no. 8 (2007): 882–88. http://dx.doi.org/10.1366/000370207781540150.

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This work was undertaken to investigate the feasibility of near-infrared (NIR) spectroscopy for estimating wood mechanical properties, i.e., modulus of elasticity (MOE) and modulus of rupture (MOR) in bending tests. Two sample sets having large and limited density variation were prepared to examine the effects of wood density on estimation of MOE and MOR by the NIR technique. Partial least squares (PLS) analysis was employed and it was found that the relationships between laboratory-measured and NIR-predicted values were good in the case of sample sets having large density variation. MOE could

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Ikutomo, R., Masato Tsujikawa, Makoto Hino, Hisamichi Kimura, Kunio Yubuta, and Akihisa Inoue. "Fine Crystalline Phase Dispersion in Zr-Based Bulk Metallic Glass by Laser Irradiation." Advanced Materials Research 26-28 (October 2007): 747–50. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.747.

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Bulk metallic glass (BMG) exhibits remarkable properties such as high strength, good stiffness and good corrosion resistance. However, the wear resistance of amorphous metals is not excellent as expected their high strength. It is thought that large local shear bands easily change into cracks for debris formation. The effective obstruction of shear band formation might be applied to improve the wear resistance of BMG. In this study, we tried to suppress shear band deformation by fine crystalline phase dispersion formed by semi-conductor laser irradiation. The microstructures of irradiated Zr-b

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Khan, A., and J. S. Roy. "Thinned Smart Antenna of a Semi-circular Dipole Array for Massive MIMO Systems." Advanced Electromagnetics 12, no. 4 (2023): 17–25. http://dx.doi.org/10.7716/aem.v12i4.2303.

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Massive MIMO (multiple-input multiple-output) is a multi-user MIMO technology that can provide high-speed multimedia services in 5G wireless networks using sub-6 GHz and millimeter wave bands. The massive MIMO (MMIMO) installs array antennas in the base stations, using hundreds of transceivers with other RF modules. One of the drawbacks of the MMIMO system is its huge power consumption, and the beamforming network with RF modules for a large number of antennas is the main contributor to the power consumption. In this paper, a novel beamforming method is proposed for the low power consumption o

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Gigante, V., V. Iacobellis, S. Manfreda, P. Milella, and I. Portoghese. "Influences of Leaf Area Index estimations on water balance modeling in a Mediterranean semi-arid basin." Natural Hazards and Earth System Sciences 9, no. 3 (2009): 979–91. http://dx.doi.org/10.5194/nhess-9-979-2009.

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Abstract. In the present work, the role played by vegetation parameters, necessary to the hydrological distributed modeling, is investigated focusing on the correct use of remote sensing products for the evaluation of hydrological losses in the soil water balance. The research was carried out over a medium-sized river basin in Southern Italy, where the vegetation status is characterised through a data-set of multi-temporal NDVI images. The model adopted uses one layer of vegetation whose status is defined by the Leaf Area Index (LAI), which is often obtained from NDVI images. The inherent prob

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Barbosa, Patrícia Alves, and Izabel Fernanda Machado. "Strain Rate Effect on the Mechanical Behavior of Austenitic Stainless Steel during Machining." Advanced Materials Research 223 (April 2011): 332–39. http://dx.doi.org/10.4028/www.scientific.net/amr.223.332.

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Machining is characterized by a large amount of localized plastic strain on material due to chip formation; hence, there is a commitment among the strain process, strain hardening, and heat softening, generating shear bands. Understanding these shear zones is important because it contains information that can be applied to the improvement of machining techniques related to process optimization, and to materials and tools innovation. In this sense, the aim is to analyze the strain and the strain hardening with the strain rate variation as from the chip formed during the austenitic stainless ste

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Lin, Zhe-Yu Daniel, Chin-Fei Lee, Zhi-Yun Li, John J. Tobin, and Neal J. Turner. "Inferring (sub)millimetre dust opacities and temperature structure in edge-on protostellar discs from resolved multiwavelength continuum observations: the case of the HH 212 disc." Monthly Notices of the Royal Astronomical Society 501, no. 1 (2020): 1316–35. http://dx.doi.org/10.1093/mnras/staa3685.

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ABSTRACT (Sub)millimetre dust opacities are required for converting the observable dust continuum emission to the mass, but their values have long been uncertain, especially in discs around young stellar objects. We propose a method to constrain the opacity κν in edge-on discs from a characteristic optical depth τ0,ν, the density ρ0, and radius R0 at the disc outer edge through κν = τ0,ν/(ρ0R0), where τ0,ν is inferred from the shape of the observed flux along the major axis, ρ0 from gravitational stability considerations, and R0 from direct imaging. We applied the 1D semi-analytical model to t

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Guo, Jifa, Shihong Du, Hongyuan Huo, Shouji Du, and Xiuyuan Zhang. "Modelling the Spectral Uncertainty of Geographic Features in High-Resolution Remote Sensing Images: Semi-Supervising and Weighted Interval Type-2 Fuzzy C-Means Clustering." Remote Sensing 11, no. 15 (2019): 1750. http://dx.doi.org/10.3390/rs11151750.

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The spectral uncertainty refers to the diversity and variations of spectral characteristics within a single geographic object or across different objects of the same class. Usually, existing methods represent the spectral characteristics as precise single-valued curves. Thus, the spectral variations cannot be modeled, which further restricts the analysis and classification performance of remote sensing images. On the other hand, unsupervised methods have poor performance in classification and modeling uncertainty, while supervised methods need a large number of samples with high quality. Fuzzy

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Poletaev, A. V., E. A. Seregina, A. V. Pshonkin, et al. "Von Willebrand factor multimeric assay: novel diagnostics capabilities." Russian Journal of Pediatric Hematology and Oncology 8, no. 2 (2021): 35–41. http://dx.doi.org/10.21682/2311-1267-2021-8-2-35-41.

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Introduction. Distinguishing between Von Willebrand disease (vWD) types often requires multimer gel analysis. The current techniques for vWF multimer structure are manual, complicated, non-standardized and time consuming. The aim of this study was to evaluate diagnostic capabilities of new automated vWF multimer screening assay.Materials and methods. Children with vWD, acquired von Willebrand Syndrome (aVWS) and 8 healthy donors as a control group were enrolled in this study. Von Willebrand factor antigen (vWF Ag); ristocetin cofactor activity (VWF:Rco); vWF collagen binding (VWF:CB); ristocet

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Vuorinne, Ilja, Janne Heiskanen, and Petri K. E. Pellikka. "Assessing Leaf Biomass of Agave sisalana Using Sentinel-2 Vegetation Indices." Remote Sensing 13, no. 2 (2021): 233. http://dx.doi.org/10.3390/rs13020233.

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Biomass is a principal variable in crop monitoring and management and in assessing carbon cycling. Remote sensing combined with field measurements can be used to estimate biomass over large areas. This study assessed leaf biomass of Agave sisalana (sisal), a perennial crop whose leaves are grown for fibre production in tropical and subtropical regions. Furthermore, the residue from fibre production can be used to produce bioenergy through anaerobic digestion. First, biomass was estimated for 58 field plots using an allometric approach. Then, Sentinel-2 multispectral satellite imagery was used

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Giannico, Vincenzo, Simone Pietro Garofalo, Luca Brillante, et al. "Temporal Vine Water Status Modeling Through Machine Learning Ensemble Technique and Sentinel-2 Multispectral Images Under Semi-Arid Conditions." Remote Sensing 16, no. 24 (2024): 4784. https://doi.org/10.3390/rs16244784.

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New challenges will be experienced by the agriculture sector in the near future, especially due to the effects of climate change. For example, rising temperatures could result in increased evapotranspiration demand, causing difficulties in the management of irrigation practices. Generally, an important predictor of plant water status to be taken into account for irrigation monitoring and management is the stem water potential. However, it requires a huge amount of time-consuming fieldwork, particularly when an adequate data amount is necessary to fully investigate the spatial and temporal vari

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Zhu-Qing, Ren, Xiong Yuan-Zhu, Deng Chang-Yang, et al. "Isolation, cloning and sequence analysis of differentially expressed genes in the backfat tissue between hybrids and parents in pigs." Chinese Journal of Agricultural Biotechnology 3, no. 1 (2006): 47–52. http://dx.doi.org/10.1079/cjb200592.

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AbstractIn order to reveal the molecular basis of heterosis, Large White (LW), an introduced European pig breed, and Meishan (MS), a Chinese indigenous pig breed, were selected to hybridize directly and reciprocally in the present experiment. mRNA differential display (DD) technique was performed to identify genes that were differentially expressed in the backfat tissues of hybrids (LW×MS, MS×LW) and purebred (LW×LW, MS×MS) pigs. The ten anchor primers in combination with ten arbitrary primers (100 sets in total) were used and nearly 1500 reproducible bands were observed in polyacrylamide gels

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Stadler, Johannes, Thomas Schmid, Lothar Opilik, Phillip Kuhn, Petra S. Dittrich, and Renato Zenobi. "Tip-enhanced Raman spectroscopic imaging of patterned thiol monolayers." Beilstein Journal of Nanotechnology 2 (August 30, 2011): 509–15. http://dx.doi.org/10.3762/bjnano.2.55.

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Full spectroscopic imaging by means of tip-enhanced Raman spectroscopy (TERS) was used to measure the distribution of two isomeric thiols (2-mercaptopyridine (2-PySH) and 4-mercaptopyridine (4-PySH)) in a self-assembled monolayer (SAM) on a gold surface. From a patterned sample created by microcontact printing, an image with full spectral information in every pixel was acquired. The spectroscopic data is in good agreement with the expected molecular distribution on the sample surface due to the microcontact printing process. Using specific marker bands at 1000 cm−1 for 2-PySH and 1100 cm−1 for

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Basel, J., and N. Pantha. "Substitutional Lithium Doping on Germanene: A First-principles Study." Journal of Nepal Physical Society 7, no. 2 (2021): 33–41. http://dx.doi.org/10.3126/jnphyssoc.v7i2.38620.

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The density functional theory (DFT) based first-principles calculations have been adopted for the study of structural, electronic and magnetic properties of pure and single Lithium (Li) atom doped germanene monolayer. Due to the higher intrinsic carrier mobilities and large spin orbit gap, germanene has great possibility of being integrated into the silicon based semiconductor industry. Different studies have been done to change the band gap value from its’ pristine zero band gap state. We have doped the single Li atom into the germanene system with the intention of tuning the band gap and oth

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Rodrigues, Rodrigo Antonio de Freitas, Juliana Pertille, Fernanda Gervasoni, et al. "Tonian Continental Arc Magmatism of the Porongos Complex, Dom Feliciano Belt, Southern Brazil." Geologia USP. Série Científica 23, no. 3 (2023): 19–45. http://dx.doi.org/10.11606/issn.2316-9095.v23-208078.

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This study provides new information on the deformation, metamorphism, and tectonic setting of the metavolcanic rocks of the southern portion of the Porongos Complex, southern Brazil. The structural analysis enabled the identification of three deformational phases, formed under ductile to semi-ductile conditions. D1 progressed through deformation partitioning, comprising closed to isoclinal folds and an axial plane foliation. Then, simple shear prevailed, resulting in isoclinal folds, sigma-type porphyroclasts, foliation transposition, and mylonitic rocks. D2 comprises open to gentle folds and

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YABE, REGINA DE SOUZA, ELIÉZER JOSÉ MARQUES, and MIGUEL ÂNGELO MARINI. "Movements of birds among natural vegetation patches in the Pantanal, Brazil." Bird Conservation International 20, no. 4 (2010): 400–409. http://dx.doi.org/10.1017/s0959270910000067.

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SummaryThe ability of birds to move through the landscape is a key parameter for ecological and conservation studies. We studied bird movements among natural vegetation patches surrounded by native grassland and tested the effect of inter-patch distance on bird movements/hour and assessed the distances travelled for species of different body mass. We made observations of 1,138 bird movements among 11 forest patches and banded 368 birds obtaining 69 recaptures (42 recaptures in the same patch where the birds were banded and 27 recaptures in other patches). We used seven patches as observation p

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Liu, Zefei, Jinqing Li, Xiaoqiang Di, Zhenlong Man, and Yaohui Sheng. "A Novel Multiband Remote-Sensing Image Encryption Algorithm Based on Dual-Channel Key Transmission Model." Security and Communication Networks 2021 (November 18, 2021): 1–27. http://dx.doi.org/10.1155/2021/9698371.

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With the rapid development of remote sensing technology, satellite remote sensing images have been involved in many areas of people’s lives. Remote sensing images contain military secrets, land profiles, and other sensitive data, so it is urgent to encrypt remote sensing images. This paper proposes a dual-channel key transmission model. The plaintext related key is embedded into the ciphertext image through bit-level key hiding transmission strategy, which enhanced the ability of ciphertext image to resist known-plaintext attack and chosen plaintext attack. In addition, a multiband remote sens

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Tronchin, Lamberto, Angelo Farina, Antonella Bevilacqua, Francesca Merli, and Pietro Fiumana. "Comparison Failure and Successful Methodologies for Diffusion Measurements Undertaken inside Two Different Testing Rooms." Applied Sciences 11, no. 22 (2021): 10523. http://dx.doi.org/10.3390/app112210523.

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The scattering phenomenon is known to be of great importance for the acoustic quality of a performance arts space. The scattering of sound can be achieved in different ways: it can be obtained by the presence of architectural and/or decorating elements inside a room (e.g., columns, statues), by the geometry and roughness of a surface (e.g., Quadratic Residue Diffuser (QRD)) and by the diffraction effect occurring when a sound wave hits the edges of an obstacle. This article deals with the surface scattering effects and the diffusion phenomenon only related to MDF and plywood panels tested by d

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Tashpolat, Nigara, and Abuduwaili Reheman. "Monitoring of Soil Salinity in the Weiku Oasis Based on Feature Space Models with Typical Parameters Derived from Sentinel-2 MSI Images." Land 14, no. 2 (2025): 251. https://doi.org/10.3390/land14020251.

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Soil salinization, as one of the types of land degradation, is a global threat. It not only poses serious ecological problems, but also poses great challenges for the sustainable utilization of land resources, especially in arid and semi-arid areas. The Weiku Oasis is undoubtedly one of the typical areas under severe salinization. The wide spread of saline soil brings numerous negative impacts to the local region. To prevent the escalation of soil salinization, timely monitoring of soil salinization is urgently needed for informed decision-making. Remote sensing technology can obtain large-sca

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Tan, Yulei, Jingtao Gu, Laijun Lu, et al. "Hyperspectral Band Selection for Crop Identification and Mapping of Agriculture." Remote Sensing 17, no. 4 (2025): 663. https://doi.org/10.3390/rs17040663.

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Different crops, as well as the same crop at different growth stages, display distinct spectral and spatial characteristics in hyperspectral images (HSIs) due to variations in their chemical composition and structural features. However, the narrow bandwidth and closely spaced spectral channels of HSIs result in significant data redundancy, posing challenges to crop identification and classification. Therefore, the dimensionality reduction in HSIs is crucial. Band selection as a widely used method for reducing dimensionality has been extensively applied in research on crop identification and ma

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Carneiro, Gustavo Fluminense, Matheus Pinheiro Ferreira, and Carlos Frederico de Sá Volotão. "Multi-source remote sensing data improves the classification accuracy of natural forests and eucalyptus plantations." Revista Brasileira de Cartografia 72, no. 1 (2020): 110–25. http://dx.doi.org/10.14393/rbcv72n1-50477.

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It is challenging to map the spatial distribution of natural and planted forests based on satellite images because of the high correlation among them. This investigation aims to increase accuracies in classifications of natural forests and eucalyptus plantations by combining remote sensing data from multiple sources. We defined four vegetation classes: natural forest (NF), planted eucalyptus forest (PF), agriculture (A) and pasture (P), and sampled 410,251 pixels from 100 polygons of each class. Classification experiments were performed by using a random forest algorithm with images from Lands

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Díaz-Martínez, Julia Patricia, Eugenio De Jesús Carpizo-Ituarte, and Francisco Benítez-Villalobos. "Reproductive patterns of the black starry sea urchin Arbacia stellata in Punta Banda, Baja California, Mexico." Journal of the Marine Biological Association of the United Kingdom 99, no. 06 (2019): 1379–91. http://dx.doi.org/10.1017/s0025315419000316.

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AbstractWidely distributed species such as Arbacia stellata adjust patterns of their life history according to local conditions. In the present study the reproductive cycle of this species was analysed throughout a sampling year. Gonadal development cycle, sex ratio, actual fecundity and oocyte size distribution were characterized and the relationship of these reproductive characteristics with environmental variables such as sea surface temperature, photoperiod, chlorophyll a and net primary production evaluated. Our results showed that A. stellata is a gonochoric sea urchin. Gametogenesis was

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Lapteva, E., E. Kravchenko, I. Odaryuk, V. Doroshkevich, and O. Baranova. "SIMULATION OF THE ELECTRONIC ABSORPTION SPECTRA OF PHENOLS AND PRODUCTS OF THEIR ENZYMATIVE OXIDATION." Russian Journal of Biological Physics and Chemisrty 8, no. 3 (2024): 288–92. http://dx.doi.org/10.29039/rusjbpc.2023.0623.

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The possibility of obtaining absorption spectra of phenols and products of their laccase oxidation by quantum-chemical modeling methods is considered. The primary optimization of the structures was carried out by the semi-empirical PM3 method, and the spectra were simulated within the framework of the density functional theory by the DFT/B3LYP/6-311G++dp method in an aqueous medium using the Gamess US program. For most of the studied phenols and their corresponding quinones, spectra containing one absorption band were obtained by calculation methods, for some - a larger number of bands, while

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Batista, Jael Soares, Carlos Iberê Alves Freitas, Kaline Alessandra Rodrigues De Paiva, et al. "Hepatic Lipidosis in Banded Armadillos (Euphractus sexcinctus) Bred in Captivity." Acta Scientiae Veterinariae 44, no. 1 (2016): 4. http://dx.doi.org/10.22456/1679-9216.84774.

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Background: Wild animals bred in captivity may develop steatosis due to unbalanced dietary intake and obesity caused by sedentary behaviour. In some rural areas, six-banded armadillos are raised in captivity inside some metal barrels, with restricted space, and are often overfeed. After getting fattening, armadillos they are slaughtered and used as food. Theunfavorable conditions may somehow contribute to likely underlie the development of many diseases, among them we can including hepatic steatosis. The present report aims to describe the pathological fndings of hepatic lipidosis in banded ar

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Wang, Wanneng, Zongli Hu, Jinzhe Li, and Guoping Chen. "Expression characterization and actual function of the second pucBA in Rhodobacter sphaeroides." Bioscience Reports 29, no. 3 (2009): 165–72. http://dx.doi.org/10.1042/bsr20080061.

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The puc2BA operon of Rhodobacter sphaeroides is highly similar to the original puc1BA operon. Genetic, biochemical and spectroscopic approaches were used to investigate the function of puc2BA; the puc1BA and puc2BA structural genes were amplified and cloned into the pRK415 vector controlled by the puc promoter from R. sphaeroides, which was then introduced into R. sphaeroides mutant strains. The results indicated that puc2BA was normally expressed and puc2BA-encoded polypeptides were assembled into membrane LHII (light-harvesting II) complexes, although the puc2A-encoded polypeptide was much l

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Lacy, M., J. A. Surace, D. Farrah, et al. "A Spitzer survey of Deep Drilling Fields to be targeted by the Vera C. Rubin Observatory Legacy Survey of Space and Time." Monthly Notices of the Royal Astronomical Society 501, no. 1 (2020): 892–910. http://dx.doi.org/10.1093/mnras/staa3714.

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ABSTRACT The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will observe several Deep Drilling Fields (DDFs) to a greater depth and with a more rapid cadence than the main survey. In this paper, we describe the ‘DeepDrill’ survey, which used the Spitzer Space Telescope Infrared Array Camera (IRAC) to observe three of the four currently defined DDFs in two bands, centred on 3.6 and 4.5 μm. These observations expand the area that was covered by an earlier set of observations in these three fields by the Spitzer Extragalactic Representative Volume Survey (SERVS). The combined De

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Ursella, L., V. Kovačević, and M. Gačić. "Tidal variability of the motion in the Strait of Otranto." Ocean Science 10, no. 1 (2014): 49–67. http://dx.doi.org/10.5194/os-10-49-2014.

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Abstract. Various current data, collected in the Strait of Otranto during the period 1994–2007, have been analysed with the aim of describing the characteristics of the tidal motions and their contribution to the total flow variance. The principal tidal constituents in the area were the semi-diurnal (M2) and the diurnal (K1), with the latter one predominant. The total flow was, in general, more energetic along the flanks than in the middle of the strait. Specifically, it was most energetic over the western shelf and in the upper layer along the eastern flank. In spite of the generally low velo

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Soffiatti, Patricia, and Veronica Angyalossy. "Anatomy of Brazilian Cereeae (subfamily Cactoideae, Cactaceae): Arrojadoa Britton & Rose, Stephanocereus A. Berger and Brasilicereus Backeberg." Acta Botanica Brasilica 21, no. 4 (2007): 813–22. http://dx.doi.org/10.1590/s0102-33062007000400006.

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(Anatomy of Brazilian Cereeae (subfamily Cactoideae, Cactaceae): Arrojadoa Britton & Rose, Stephanocereus A. Berger wâBrasilicereus Backeberg). Arrojadoa, Stephanocereus and Brasilicereus are endemic Brazilian Cereeae, occurring along the Espinhaço Range, in the campos rupestres, cerrados and caatingas, from northern Minas Gerais to southern Bahia. The genera are columnar, erect to semi-erect cacti, except for one species, A bahiensis, which is globose. This study describes the anatomy of dermal, fundamental and vascular systems, aiming to find diagnostic characters for the genera and spec

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Nolde, Michael, Simon Plank, and Torsten Riedlinger. "An Adaptive and Extensible System for Satellite-Based, Large Scale Burnt Area Monitoring in Near-Real Time." Remote Sensing 12, no. 13 (2020): 2162. http://dx.doi.org/10.3390/rs12132162.

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In the case of ongoing wildfire events, timely information on current fire parameters is crucial for informed decision making. Satellite imagery can provide valuable information in this regard, since thermal sensors can detect the exact location and intensity of an active fire at the moment the satellite passes over. This information can be derived and distributed in near-real time, allowing for a picture of current fire activity. However, the derivation of the size and shape of an already affected area is more complex and therefore most often not available within a short time frame. For urgen

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Wang, Yaqin, Haimei Yang, Wenbo Fan, Changlu Qiao, and Kai Sun. "Dynamic Variability of Wind Erosion Climatic Erosivity and Their Relationships with Large-Scale Atmospheric Circulation in Xinjiang, China." Atmosphere 13, no. 3 (2022): 419. http://dx.doi.org/10.3390/atmos13030419.

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Xinjiang has a serious wind erosion problem due to its fragile ecological condition and sensitivity to climate change. Wind erosion climatic erosivity is a measure of climatic factors influencing wind erosion; evaluating its spatiotemporal variations and relationship with the large-scale circulation pattern can contribute to the understanding of the climate change effect on wind erosion risk. Thus, this study quantified the wind erosion climatic erosivity and examined the connections between climatic erosivity and climate indices using trend analysis, geo-statistical analysis, and cross-wavele

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Niu, Sida, Liqun Zhao, Xiaoju Lin, et al. "Mineralogical Characterization of Manganese Oxide Minerals of the Devonian Xialei Manganese Deposit." Minerals 11, no. 11 (2021): 1243. http://dx.doi.org/10.3390/min11111243.

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The Guangxi Zhuang Autonomous Region is an important manganese ore district in Southwest China, with manganese ore resource reserves accounting for 23% of the total manganese ore resource reserves in China. The Xialei manganese deposit (Daxin County, Guangxi) is the first super-large manganese deposit discovered in China. The Mn oxide in the supergene oxidation zone of the Xialei deposit was characterized using scanning electron microscopy (SEM), energy spectrometer (EDS), transmission electron microscopy (TEM, HRTEM), and X-ray diffraction analysis (XRD). The Mn oxides have a gray-black/steel

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