U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject "topography" Remove constraint Subject: "topography"
Start Over

Search

16,321  Search Results

« Previous | 1 - 20 of 16,321 |
Number of results to display per page

Search Results

1. Formation processes and source contributions of ground‐level ozone in urban and suburban Beijing using the WRF‐CMAQ modelling system

Author:
Shuxian Zhang; Zhongzhi Zhang; Yang Li; Xiaohui Du; Linglu Qu; Wei Tang; Jun Xu; Fan Meng
Source:
Journal of environmental sciences (China) 2023 v.127 pp. 753-766
ISSN:
1001-0742
Subject:
topography,   etc   ; air quality; ozone; pollution; summer; titration; China;     Show all 7 Subjects
Abstract:
... Beijing faces the challenge of high levels of ozone (O₃) pollution. In this study, the Weather Research and Forecasting model and Community Multiscale Air Quality model (CMAQ) were used to simulate atmospheric O₃ concentrations in Beijing. To investigate the formation mechanisms and source contributions of O₃ pollution in different regions of Beijing, process analysis and the integrated source app ...
DOI:
10.1016/j.jes.2022.06.016

2. Electrostatic Polydopamine-Interface-Mediated (e-PIM) filters with tuned surface topography and electrical properties for efficient particle capture and ozone removal

Author:
Yilun Gao; Enze Tian; Jinhan Mo
Source:
Journal of hazardous materials 2023 v.441 pp. 129821
ISSN:
0304-3894
Subject:
topography,   etc   ; air; environmental health; filtration; manganese monoxide; ozone; particulates; polyesters; prototypes;     Show all 9 Subjects
Abstract:
... Ambient particulate matter (PM) poses severe environmental health risks to the public globally, and efficient filtration technologies are urgently needed for air ventilation. In this contribution, to overcome the efficiency-resistance trade-off for fibrous filtration, we introduced an electrostatic polydopamine-interface-mediated (e-PIM) filter utilizing a combined effect of particle pre-charging ...
DOI:
10.1016/j.jhazmat.2022.129821

3. Modeling the spatially heterogeneous relationships between tradeoffs and synergies among ecosystem services and potential drivers considering geographic scale in Bairin Left Banner, China

Author:
Chenli Xue; Xinghua Chen; Lirong Xue; Huiqiong Zhang; Jianping Chen; Dedong Li
Source:
Science of the total environment 2023 v.855 pp. 158834
ISSN:
0048-9697
Subject:
topography,   etc   ; carbon sequestration; climate; ecosystems; environment; habitats; quantitative analysis; social welfare; soil conservation; sustainable development; vegetation; China;     Show all 12 Subjects
Abstract:
... Understanding the complex relationships of tradeoffs and synergies among ecosystem services (ESs) is essential to achieve a comprehensive, coordinated, and sustainable development for human well-being. However, the quantitative measurement for the properties and intensities within these relationships as well as the deeper exploration of its formation mechanism from a spatial-explicit perspective i ...
DOI:
10.1016/j.scitotenv.2022.158834

4. Wake Vortices and Dissipation in a Tidally Modulated Flow Past a Three‐Dimensional Topography

Author:
Pranav Puthan; Geno Pawlak; Sutanu Sarkar
Source:
Journal of geophysical research 2022 v.127 no.8 pp. e2022JC018470
ISSN:
2169-9275
Subject:
topography,   etc   ; geophysics; research;     Show all 3 Subjects
Abstract:
... Large eddy simulations are employed to investigate the role of tidal modulation strength on wake vortices and dissipation in flow past three‐dimensional topography, specifically a conical abyssal hill. The barotropic current is of the form Uc + Uₜ sin(Ωₜt), where Uc and Uₜ are the mean and oscillatory components, respectively, and Ωₜ is the tidal frequency. A regime with strong stratification and ...
DOI:
10.1029/2022JC018470

5. Where to display vital information? ERP evidence for background changes

Author:
Greeshma Sharma; Joy Chatterjee; Sushil Chandra
Source:
Heliyon 2022 v.8 no.4 pp. e09237
ISSN:
2405-8440
Subject:
topography,   etc   ; color; electrophysiology;     Show all 3 Subjects
Abstract:
... Critical decision systems require expeditious and accurate responses to the displayed information. In addition to content, location and background are equally important. Several visual search studies have pointed out the differences and compared modes of top-down attention allocation: distractor suppression and attentional capture. Previous studies have used color (mainly) and shape as a feature b ...
DOI:
10.1016/j.heliyon.2022.e09237

6. Development and application of 3D spatial metrics using point clouds for landscape visual quality assessment

Author:
Jinda Qi; Ervine Shengwei Lin; Puay Yok Tan; Roger Chun Man Ho; Angelia Sia; Agnieszka Olszewska-Guizzo; Xudong Zhang; Radha Waykool
Source:
Landscape and urban planning 2022 v.228 pp. 104585
ISSN:
0169-2046
Subject:
topography,   etc   ; color; landscapes;     Show all 3 Subjects
Abstract:
... Landscape visual quality (LVQ) relates to a landscape’s spatial, functional and visual structure at a given time, which can affect the senses and experience of the person using or viewing the landscape. A holistic LVQ assessment can be undertaken by using two complementary approaches. The first uses visual quality assessment tools to measure a person’s perceptive responses to landscapes; the secon ...
DOI:
10.1016/j.landurbplan.2022.104585

7. Strategy toward fluorinated polyhedral oligomeric silsesquioxane wrapping nanoparticles for superomniphobic surfaces

Author:
Boxu Chen; Mingjin Yang; Xilin Lin; Wenfeng Liu; Hai Yuan; Jingwen Liao
Source:
Chemical communications 2022 v.58 no.26 pp. 4263-4266
ISSN:
1364-548X
Subject:
topography,   etc   ; protonation; silsesquioxanes;     Show all 3 Subjects
Abstract:
... For engineering implementation of an ultralow-surface-energy hierarchically micro/nanostructured topography for superomniphobic surfaces, a strategy involving the design of a partially open-cage fluorinated polyhedral oligomeric silsesquioxane bearing an –OH pair (poc-F₁₃POSS-2OH) and the subsequent wrapping of nanoparticles with poc-F₁₃POSS-2OH as a result of weak-acid-triggered –OH protonation i ...
DOI:
10.1039/d2cc00275b

8. Peptide Tethering: Pocket-Directed Fragment Screening for Peptidomimetic Inhibitor Discovery

Author:
Ashley E. Modell; Frank Marrone; Nihar R. Panigrahi; Yingkai Zhang; Paramjit S. Arora
Source:
Journal of the American Chemical Society 2022 v.144 no.3 pp. 1198-1204
ISSN:
1520-5126
Subject:
topography,   etc   ; ligands; peptides;     Show all 3 Subjects
Abstract:
... Constrained peptides have proven to be a rich source of ligands for protein surfaces, but are often limited in their binding potency. Deployment of nonnatural side chains that access unoccupied crevices on the receptor surface offers a potential avenue to enhance binding affinity. We recently described a computational approach to create topographic maps of protein surfaces to guide the design of n ...
DOI:
10.1021/jacs.1c09666

9. Computational morphology of debris and alluvial fans on irregular terrain using the visibility polygon

Author:
Tzu-Yin Kasha Chen; Hervé Capart
Source:
Computers & geosciences 2022 v.169 pp. 105228
ISSN:
0098-3004
Subject:
topography,   etc   ; algorithms; geometry; landscapes;     Show all 4 Subjects
Abstract:
... A computational method is proposed to simulate the morphology of debris and alluvial fans formed on irregular terrain, where they may abut or bend around steeper valley sides or obstacles. Fan elevation and slope are assumed to depend only on the distance from the apex, measured along straight or winding paths. When there are no obstacles, the resulting fan morphologies are simply surfaces of revo ...
DOI:
10.1016/j.cageo.2022.105228

10. Integrating topographic knowledge into deep learning for the void-filling of digital elevation models

Author:
Sijin Li; Guanghui Hu; Xinghua Cheng; Liyang Xiong; Guoan Tang; Josef Strobl
Source:
Remote sensing of environment 2022 v.269 pp. 112818
ISSN:
0034-4257
Subject:
topography,   etc   ; environment; landscapes; radar;     Show all 4 Subjects
Abstract:
... Digital elevation models (DEMs) contain some of the most important data for providing terrain information and supporting environmental analyses. However, the applications of DEMs are significantly limited by data voids, which are commonly found in regions with rugged terrain. We propose a novel deep learning-based strategy called a topographic knowledge-constrained conditional generative adversari ...
DOI:
10.1016/j.rse.2021.112818

11. A Matlab script for the morphometric analysis of subaerial, subaquatic and extra-terrestrial rivers, channels and canyons

Author:
Martin Hasenhündl; Koen Blanckaert
Source:
Computers & geosciences 2022 v.162 pp. 105080
ISSN:
0098-3004
Subject:
topography,   etc   ; morphometry; Lake Constance;     Show all 3 Subjects
Abstract:
... Morphometric characteristics play an important role in the classification and modelling of fluvial systems. With increasing numbers of detailed surveys of subaquatic canyon and channel systems in lakes, reservoirs, oceans and extra-terrestrial systems, previous research has repeatedly tried to draw parallels between poorly understood subaquatic and extra-terrestrial systems and much studied subaer ...
DOI:
10.1016/j.cageo.2022.105080

12. Are dynamic fluvial morphological unit assemblages statistically stationary through floods of less than ten times bankfull discharge?

Author:
Katherine A. Woodworth; Gregory B. Pasternack
Source:
Geomorphology 2022 v.403 pp. 108135
ISSN:
0169-555X
Subject:
topography,   etc   ; gravel; landforms; rivers;     Show all 4 Subjects
Abstract:
... The morphological unit (MU) characterizes river landforms at the scale of ~0.5–5 channel widths. Geomorphic theory posits that ceteris paribus under a stationary flow and sediment regime, a river's channel pattern and its MU assemblage will also be stationary. This study tested that conjecture for the dynamic, gravel/cobble lower Yuba River. The MU assemblage consisting of eight in-channel bed typ ...
DOI:
10.1016/j.geomorph.2022.108135

13. Cross-track error estimation of wide-swath altimeters based on reference topography data

Author:
Xiangying Miao; Jing Wang; Peng Mao; Hongli Miao
Source:
International journal of remote sensing 2022 v.43 no.4 pp. 1345-1355
ISSN:
1366-5901
Subject:
topography,   etc   ; satellites; sea level;     Show all 3 Subjects
Abstract:
... Wide-swath altimeters, which can provide unprecedented fine-scale data for marine research, are an important development direction in the new generation of satellite altimeters. However, the cross-track error, one of the main error sources for wide-swath altimeters, must be fully estimated and corrected. Error estimation based on reference topography data (RTD) is effective. Since the sea surface ...
DOI:
10.1080/01431161.2022.2038397

14. CH₃NH₃⁺ and Pb immobilization through PbI₂ binding by organic molecule doping for homogeneous organometal halide perovskite films

Author:
He Jiang; Qianqian Yao; Xiaoyue Zhang; Bangmin Zhang; Weiwei Xing; Yijing Sun; Weiming Xiong; Xin Luo; Wenpeng Zhu; Yue Zheng
Source:
Journal of materials chemistry A 2022 v.10 no.23 pp. 12359-12370
ISSN:
2050-7496
Subject:
topography,   etc   ; crystal structure; nanofibers;     Show all 3 Subjects
Abstract:
... Organic molecule doping is one of the main strategies to enhance the performance and sustainability of organometal halide perovskite polycrystalline films. However, the mechanisms for interpreting organic molecule doping are poorly understood, limiting the development of perovskite solar cells (PSCs). Herein, we revisit regular perovskite films and study the doping effects of two typical organic m ...
DOI:
10.1039/d2ta01340a

15. Impact Earth: A review of the terrestrial impact record

Author:
Gordon R. Osinski; Richard A.F. Grieve; Ludovic Ferrière; Ania Losiak; Annemarie E. Pickersgill; Aaron J. Cavosie; Shannon M. Hibbard; Patrick J.A. Hill; Juan Jaimes Bermudez; Cassandra L. Marion; Jennifer D. Newman; Sarah L. Simpson
Source:
Earth-science reviews 2022 v.232 pp. 104112
ISSN:
0012-8252
Subject:
topography,   etc   ; databases; glass; morphometry;     Show all 4 Subjects
Abstract:
... Over the past few decades, it has become increasingly clear that the impact of interplanetary bodies on other planetary bodies is one of the most ubiquitous and important geological processes in the Solar System. This impact process has played a fundamental role throughout the history of the Earth and other planetary bodies, resulting in both destructive and beneficial effects. The impact craterin ...
DOI:
10.1016/j.earscirev.2022.104112

16. An axis-matching approach to combined collinear pattern recognition for urban building groups

Author:
Ruixing Xing; Fang Wu; Xianyong Gong; Jiawei Du; Chengyi Liu
Source:
Geocarto international 2022 v.37 no.16 pp. 4823-4842
ISSN:
1752-0762
Subject:
topography,   etc   ; geometry; visual perception;     Show all 3 Subjects
Abstract:
... Building pattern extraction is one of the crucial components in map generalization. Previous studies mainly focus on the homogeneity between individual buildings in the collinear patterns, while pay less attentions to the complex collinear patterns, in which buildings are locally heterogeneous. Therefore, we put forward a novel combined collinear pattern to extend the existing pattern typology. Th ...
DOI:
10.1080/10106049.2021.1899305

17. Effects of Topographic Factors on Cultivated-Land Ridge Orientation in the Black Soil Region of Songnen Plain

Author:
Guoming Du; Tongbing Guo; Chen Ma
Source:
Land 2022 v.11 no.9 pp. -
ISSN:
2073-445X
Subject:
topography,   etc   ; Mollisols; agricultural land; landscapes;     Show all 4 Subjects
Abstract:
... Topographic factors are essential to the spatial distribution of ridge orientation, yet the literature shows limited exploration of the mechanisms underlying the effects of terrain on cultivated-land ridge orientation in a black soil region. To better understand this subject, interpretation, statistical analyses and field verification were carried out in Songnen Plain, a typical Mollisol area. The ...
DOI:
10.3390/land11091489

18. Guidance in the calibration of two-dimensional models of historical floods in urban areas: a case study

Author:
Corrado Paolo Mancini; Stefano Lollai; Guido Calenda; Elena Volpi; Aldo Fiori
Source:
Hydrological sciences journal 2022 v.67 no.3 pp. 358-368
ISSN:
2150-3435
Subject:
topography,   etc   ; case studies; hydrodynamics; Italy;     Show all 4 Subjects
Abstract:
... The statistical characterization of extreme floods largely benefits from the reconstruction of historical floods, making use of various documentary sources and of hydrodynamic models. The two-dimensional (2D) modelling approach provides a higher accuracy and detail with respect to one-dimensional (1D) modelling. On the other hand, 2D models require a large amount of topographic and hydraulic infor ...
DOI:
10.1080/02626667.2021.2022153

19. Investigation of Effects of Near‐Surface Complexities on Measurement of Mantle Discontinuity Using SS and Its Precursors

Author:
Peifeng Wang; Yong Zhou; Min Xu; Han Zhang; Xiaofei Chen; Laiyin Guo
Source:
Journal of geophysical research 2022 v.127 no.9 pp. e2022JB024485
ISSN:
2169-9313
Subject:
topography,   etc   ; algorithms; geophysics; research; sediments;     Show all 5 Subjects
Abstract:
... Seismic observations of the mantle discontinuities at depths of 410 and 660 km provide crucial information to constrain the thermal and compositional states and further shape our understanding of mantle dynamics. The topography and impedance contrast of the mantle discontinuities, at both global and regional scales, have been imaged through differential travel times and amplitude ratios between SS ...
DOI:
10.1029/2022JB024485

20. Leveraging Solidification Dynamics to Design Robust Ice-Shedding Surfaces

Author:
Michael J. Wood; Gregory Brock; Phillip Servio; Anne-Marie Kietzig
Source:
ACS applied materials & interfaces 2022 v.14 no.33 pp. 38379-38387
ISSN:
1944-8252
Subject:
topography,   etc   ; adhesion; delamination; ice; solidification;     Show all 5 Subjects
Abstract:
... The adhesion of ice to external surfaces is an important challenge in many industries. This has sparked much research into fabricating surfaces with low ice adhesion strengths. Our novel approach to designing ice-shedding surfaces leverages the dynamics of water solidification to induce beneficial stress concentrations throughout the iced interface. We have chosen a bare woven metal wire cloth sub ...
DOI:
10.1021/acsami.2c10656