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39 Results Found

  • Article
  • Open Access
6 Citations
4,896 Views
15 Pages

HexTile: A Hexagonal DGGS-Based Map Tile Algorithm for Visualizing Big Remote Sensing Data in Spark

  • Xiaochuang Yao,
  • Guojiang Yu,
  • Guoqing Li,
  • Shuai Yan,
  • Long Zhao and
  • Dehai Zhu

The advent of the era of big remote sensing data has transformed traditional data management and analysis models, among which visualization analysis has gradually become an effective method, and map tiles for remote sensing data have always played an...

  • Feature Paper
  • Article
  • Open Access
20 Citations
7,752 Views
20 Pages

Disdyakis Triacontahedron DGGS

  • John Hall,
  • Lakin Wecker,
  • Benjamin Ulmer and
  • Faramarz Samavati

The amount of information collected about the Earth has become extremely large. With this information comes the demand for integration, processing, visualization and distribution of this data so that it can be leveraged to solve real-world problems....

  • Review
  • Open Access
104 Citations
10,624 Views
15 Pages

Enabling the Big Earth Observation Data via Cloud Computing and DGGS: Opportunities and Challenges

  • Xiaochuang Yao,
  • Guoqing Li,
  • Junshi Xia,
  • Jin Ben,
  • Qianqian Cao,
  • Long Zhao,
  • Yue Ma,
  • Lianchong Zhang and
  • Dehai Zhu

23 December 2019

In the era of big data, the explosive growth of Earth observation data and the rapid advancement in cloud computing technology make the global-oriented spatiotemporal data simulation possible. These dual developments also provide advantageous conditi...

  • Article
  • Open Access
1,631 Views
28 Pages

Spherical Magnetic Vector Forwarding of Isoparametric DGGS Cells with Natural Superconvergent Points

  • Peng Chen,
  • Shujin Cao,
  • Guangyin Lu,
  • Dongxin Zhang,
  • Xinyue Chen and
  • Zhiming Chen

17 September 2024

With the rapid advancement of satellite remote sensing technology, many scientists and organizations, including NASA, ESA, NAOC, and Roscosmos, observe and study significant changes in the geomagnetic field, which has greatly promoted research on the...

  • Article
  • Open Access
1,793 Views
35 Pages

Real-Time Multiresolution Management of Spatiotemporal Earth Observation Data Using DGGS

  • Amir Mirzai Golpayegani,
  • Mahmudul Hasan and
  • Faramarz F. Samavati

7 February 2025

The effective management of spatiotemporal Earth observation data is a significant challenge due to their growing size and scale, geometric distortion, temporal gaps, and restricted access. In this article, we introduce a novel methodology utilizing...

  • Article
  • Open Access
2 Citations
2,531 Views
27 Pages

A GPU-Based Integration Method from Raster Data to a Hexagonal Discrete Global Grid

  • Senyuan Zheng,
  • Liangchen Zhou,
  • Chengshuai Lu and
  • Guonian Lv

4 June 2024

This paper proposes an algorithm for the conversion of raster data to hexagonal DGGSs in the GPU by redevising the encoding and decoding mechanisms. The researchers first designed a data structure based on rhombic tiles to convert the hexagonal DGGS...

  • Article
  • Open Access
5,759 Views
7 Pages

The effects of 5, 25, and 40 Echinostoma caproni miracidia on the sugar content of young adult and mature adult Biomphalaria glabrata were studied using high performance thin layer chromatography (HPTLC)-densitometry. Analysis was done on the snail’s...

  • Article
  • Open Access
9 Citations
4,927 Views
22 Pages

A Multi-Resolution Approach to Point Cloud Registration without Control Points

  • Eleanor A. Bash,
  • Lakin Wecker,
  • Mir Mustafizur Rahman,
  • Christine F. Dow,
  • Greg McDermid,
  • Faramarz F. Samavati,
  • Ken Whitehead,
  • Brian J. Moorman,
  • Dorota Medrzycka and
  • Luke Copland

20 February 2023

Terrestrial photographic imagery combined with structure-from-motion (SfM) provides a relatively easy-to-implement method for monitoring environmental systems, even in remote and rough terrain. However, the collection of in-situ positioning data and...

  • Article
  • Open Access
7 Citations
3,521 Views
15 Pages

DGG: A Novel Framework for Crowd Gathering Detection

  • Jianqiang Xu,
  • Haoyu Zhao,
  • Weidong Min,
  • Yi Zou and
  • Qiyan Fu

Crowd gathering detection plays an important role in security supervision of public areas. Existing image-processing-based methods are not robust for complex scenes, and deep-learning-based methods for gathering detection mainly focus on the design o...

  • Article
  • Open Access
5 Citations
3,841 Views
22 Pages

Design and Synthesis of a Novel 4-aryl-N-(2-alkoxythieno [2,3-b]pyrazine-3-yl)-4-arylpiperazine-1-carboxamide DGG200064 Showed Therapeutic Effect on Colon Cancer through G2/M Arrest

  • Eun-Sil Lee,
  • Nayeon Kim,
  • Joon Hee Kang,
  • Aizhan Abdildinova,
  • Seon-Hyeong Lee,
  • Myung Hwi Lee,
  • Nam Sook Kang,
  • Tae-Sung Koo,
  • Soo-Youl Kim and
  • Young-Dae Gong

20 April 2022

Cancer cells are characterized by an abnormal cell cycle. Therefore, the cell cycle has been a potential target for cancer therapeutic agents. We developed a new lead compound, DGG200064 (7c) with a 2-alkoxythieno [2,3-b]pyrazine-3-yl)-4-arylpiperazi...

  • Article
  • Open Access
418 Views
23 Pages

DGG-LDP: Directed Graph Generation Algorithm with Local Differential Privacy

  • Xi Yang,
  • Guoqiang Zhang,
  • Zekun Hou and
  • Jianming Yang

11 December 2025

In various real-world scenarios, directed graphs can express the nature of relationships more clearly than undirected ones. Meanwhile, decentralized networks have attracted increasing attention in recent years. In decentralized directed networks (e.g...

  • Article
  • Open Access
65 Citations
12,045 Views
17 Pages

25 February 2015

Digital Earth frameworks provide a tool to receive, send and interact with large location-based datasets, organized usually according to Discrete Global Grid Systems (DGGS). In DGGS, an indexing method is used to assign a unique index to each cell of...

  • Feature Paper
  • Article
  • Open Access
10 Citations
6,368 Views
24 Pages

Geospatial sensors are generating increasing amounts of three-dimensional (3D) data. While Discrete Global Grid Systems (DGGS) are a useful tool for integrating geospatial data, they provide no native support for 3D data. Several different 3D global...

  • Article
  • Open Access
5 Citations
3,898 Views
21 Pages

Encoding Conversion Algorithm of Quaternary Triangular Mesh

  • Yihang Chen,
  • Zening Cao,
  • Jinxin Wang,
  • Yan Shi and
  • Zilong Qin

In the process of global information construction, different fields have built their own discrete global grid systems (DGGS). With the development of big data technology, data exchange, integration, and update have gradually become a trend, as well a...

  • Article
  • Open Access
15 Citations
3,485 Views
29 Pages

Correlation Analysis and Reconstruction of the Geometric Evaluation Indicator System of the Discrete Global Grid

  • Zheng Wang,
  • Xuesheng Zhao,
  • Wenbin Sun,
  • Fuli Luo,
  • Yalu Li and
  • Yuanzheng Duan

Although a Discrete Global Grid (DGG) is uniform in its initial subdivision, its geometric deformation increases with the level of subdivisions. The Goodchild Criteria are often used to evaluate the quality of DGGs. However, some indicators in these...

  • Article
  • Open Access
3 Citations
2,004 Views
28 Pages

Spherical Gravity Forwarding of Global Discrete Grid Cells by Isoparametric Transformation

  • Shujin Cao,
  • Peng Chen,
  • Guangyin Lu,
  • Yihuai Deng,
  • Dongxin Zhang and
  • Xinyue Chen

17 March 2024

For regional or even global geophysical problems, the curvature of the geophysical model cannot be approximated as a plane, and its curvature must be considered. Tesseroids can fit the curvature, but their shapes vary from almost rectangular at the e...

  • Article
  • Open Access
1,387 Views
15 Pages

6 April 2025

Ionospheric tomography, an effective method for reconstructing 3-D electron density, is traditionally pictured by 3-D IED (ionospheric electron density) slices to express ionospheric disturbances, which may overlook the critical information in 3-D sp...

  • Article
  • Open Access
11 Citations
3,717 Views
25 Pages

A Novel Integrated UWB Sensing and 8-Element MIMO Communication Cognitive Radio Antenna System

  • D Srikar,
  • Anveshkumar Nella,
  • Ranjith Mamidi,
  • Ashok Babu,
  • Sudipta Das,
  • Sunil Lavadiya,
  • Abeer D. Algarni and
  • Walid El-Shafai

In this article, a cognitive radio (CR) integrated antenna system, which has 1 sensing and 24 communication antennas, is proposed for better spectrum utilization efficiency. In the 24 communication antennas, 3 different operating band antennas are re...

  • Article
  • Open Access
4 Citations
2,703 Views
29 Pages

A GtoG Direct Coding Mapping Method for Multi-Type Global Discrete Grids Based on Space Filling Curves

  • Yalu Li,
  • Xuesheng Zhao,
  • Wenbin Sun,
  • Guangsong Wang,
  • Fuli Luo,
  • Zheng Wang and
  • Yuanzheng Duan

DGGS (Discrete Global Grid System) has many subdivision models and coding methods. Due to the lack of underlying consistency of different DGGS codes, most of them are converted through longitude–latitude, which greatly reduces the interoperabil...

  • Article
  • Open Access
1 Citations
1,770 Views
28 Pages

The Discrete Global Grid System (DGGS) provides a foundational framework for the digital Earth, where uniform intercell distances are essential for accurate numerical simulations. However, due to the spherical topology, achieving strictly equidistant...

  • Article
  • Open Access
9 Citations
3,994 Views
16 Pages

Topological distortion seriously affects spatial cognition. To solve this problem caused by the integration of vector features in discrete global grid systems (DGGs), a topology-preserving gridding method for vector features is proposed. The method p...

  • Article
  • Open Access
6 Citations
4,947 Views
22 Pages

Geospatial data analysis often requires the computing of a distance transform for a given vector feature. For instance, in wildfire management, it is helpful to find the distance of all points in an area from the wildfire’s boundary. Computing...

  • Article
  • Open Access
9 Citations
4,271 Views
26 Pages

Among the most prevalent natural hazards, flooding has been threatening human lives and properties. Robust flood simulation is required for effective response and prevention. Machine learning is widely used in flood modeling due to its high performan...

  • Article
  • Open Access
7 Citations
4,691 Views
16 Pages

A Three-Dimensional Buffer Analysis Method Based on the 3D Discrete Global Grid System

  • Jinxin Wang,
  • Yan Shi,
  • Zilong Qin,
  • Yihang Chen and
  • Zening Cao

Three-dimensional (3D) buffer analysis is among the basic functions of 3D spatial analysis, and it plays an important role in 3D geographic information systems. The rapid development of the 3D Discrete Global Grid System (DGGS) provides a new method...

  • Article
  • Open Access
12 Citations
4,051 Views
24 Pages

23 September 2018

The phase-field-crystal (PFC) method is used to investigate migration of grain boundary dislocation and dynamic of strain-driven nucleation and growth of deformed grain in two dimensions. The simulated results show that the deformed grain nucleates t...

  • Article
  • Open Access
9 Citations
3,890 Views
17 Pages

With the huge volume of location-based point data being generated by Internet of Things (IoT) devices and subsequent rising interest from the Digital Earth community, a need has emerged for spatial operations that are compatible with Digital Earth fr...

  • Article
  • Open Access
60 Citations
5,845 Views
25 Pages

An Available Strategy for Nasal Brain Transport of Nanocomposite Based on PAMAM Dendrimers via In Situ Gel

  • Huichao Xie,
  • Lingjun Li,
  • Yue Sun,
  • Yuzhen Wang,
  • Shuang Gao,
  • Yuan Tian,
  • Xuemei Ma,
  • Chengcheng Guo,
  • Fumin Bo and
  • Li Zhang

24 January 2019

Polyamidoamine (PAMAM) dendrimers are efficient drug carriers. The presence of a physiological pathway for nasal brain transport provides a potential path for direct brain-targeted delivery of dendrimer nanocomposites. In this study, we synthesized P...

  • Article
  • Open Access
2 Citations
4,789 Views
13 Pages

Effectiveness of Plasma-Rich Fibrin and De-Epithelialized Free Gingival Graft in the Treatment of Gingival Recessions

  • Bojan Jovičić,
  • Stevo Matijević,
  • Stefan Veličković,
  • Momir Stevanović,
  • Aleksandra Mišić,
  • Slavoljub Stanojević and
  • Marija Bubalo

23 February 2023

Introduction/Aim: Soft tissue dehiscences such as gingival recessions are a very common problem that we face in modern periodontics. This clinical study aimed to analyze the effectiveness of surgical procedures using a de-epithelialized gingival graf...

  • Article
  • Open Access
1 Citations
2,961 Views
29 Pages

Recent advancements in geospatial technologies have significantly expanded the volume and diversity of geospatial data, unlocking new and innovative applications that require novel Geographic Information Systems (GIS). (Discrete) Global Grid Systems...

  • Article
  • Open Access
3 Citations
2,535 Views
9 Pages

23 April 2021

In modern protein–carbohydrate interactions, carbohydrate–aromatic contact with CH–π interactions are used. Currently, they are considered driving forces of this complexation. In these contacts, tryptophan, tyrosine, and histidine are preferred. In t...

  • Article
  • Open Access
1 Citations
1,681 Views
15 Pages

An Earth system spatial grid (ESSG) is an extension of a discrete global grid system (DGGS) in the radial direction. It is an important tool for organizing, representing, simulating, analyzing, sharing, and visualizing spatial data. The existing ESSG...

  • Article
  • Open Access
11 Citations
5,080 Views
13 Pages

Vectors are a key type of geospatial data, and their discretization, which involves solving the problem of generating a discrete line, is particularly important. In this study, we propose a method for constructing a discrete line mathematical model f...

  • Article
  • Open Access
12 Citations
5,251 Views
10 Pages

An Improved Identification Code for City Components Based on Discrete Global Grid System

  • Kun Qi,
  • Chengqi Cheng,
  • Yi’na Hu,
  • Huaqiang Fang,
  • Yan Ji and
  • Bo Chen

City components are important elements of a city, and their identification plays a key role in digital city management. Various identification codes have been proposed by different departments and systems over the years, however, their application ha...

  • Article
  • Open Access
8 Citations
3,468 Views
17 Pages

Marine Microalgae Biomolecules and Their Adhesion Capacity to Salmonella enterica sv. Typhimurium

  • Tatiane Winkler Marques Machado,
  • Jenifer Mota Rodrigues,
  • Tatiana Rojo Moro,
  • Maria Eugênia Rabello Duarte and
  • Miguel Daniel Noseda

25 March 2020

Different molecules have been tested as analog receptors due to their capacity to bind bacteria and prevent cell adhesion. By using in vitro assays, the present study characterized the aqueous and alkaline extracts from microalgae Pavlova lutheri and...

  • Article
  • Open Access
2,007 Views
20 Pages

With the continuous advancement of technology for obtaining geographic spatial data, the accumulated volume of such data has been increasing, thus imposing higher demands on the storage, organization, and management of such data. As a new form of dat...

  • Article
  • Open Access
1 Citations
2,079 Views
20 Pages

A Big Data Grided Organization and Management Method for Cropland Quality Evaluation

  • Shuangxi Miao,
  • Shuyu Wang,
  • Chunyan Huang,
  • Xiaohong Xia,
  • Lingling Sang,
  • Jianxi Huang,
  • Han Liu,
  • Zheng Zhang,
  • Junxiao Zhang and
  • Fei Gao
  • + 1 author

13 October 2023

A new gridded spatio-temporal big data fusion method is proposed for the organization and management of cropland big data, which could serve the analysis application of cropland quality evaluation and other analyses of geographic big data. Compared w...

  • Article
  • Open Access
1,403 Views
26 Pages

27 March 2025

This paper presents a novel Earth-System Stratified Grid (ISEA4H-ESSG) model, designed to address the challenges in multi-layer geoscience data management and analysis. In the realm of geosciences, which encompasses the solid earth, atmosphere, hydro...

  • Article
  • Open Access
1 Citations
3,587 Views
18 Pages

Clinical Efficacy of Er,Cr:YSGG Laser for Deepithelialization of Free Gingival Grafts in Gingival Recession Treatment: A Randomized, Split-Mouth Clinical Trial

  • Artur Banyś,
  • Jakub Fiegler-Rudol,
  • Zuzanna Grzech-Leśniak,
  • Rafał Wiench,
  • Jacek Matys,
  • Jamil A. Shibli and
  • Kinga Grzech-Leśniak

29 July 2025

Bcakground: The deepithelialized free gingival graft (DGG) technique provides high-quality connective tissue grafts (CTGs) with predictable outcomes for recession coverage. This study evaluates a novel method of free gingival graft (FGG) deepithelial...

  • Article
  • Open Access
13 Citations
3,334 Views
13 Pages

14 October 2021

The present study set out to determine the effects of incorporating cDDGS into starter, grower, and finisher diets (containing 5%, 10%, and 15% of cDDGS, respectively) on growth performance, carcass and meat quality, and cost effectiveness of pig fat...