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823 Results Found

  • Article
  • Open Access
16 Citations
7,041 Views
22 Pages

What Determines the Shadow Economy? An Extreme Bounds Analysis

  • Mohammed Nayel Abu Alfoul,
  • Ibrahim Naser Khatatbeh and
  • Fouad Jamaani

10 May 2022

The purpose of this paper was to identify the leading causes determining the shadow economy at the global level. The empirical analysis used was the Sala-i-Martin version of extreme bounds analysis (EBA) applied to a cross-sectional sample of 132 cou...

  • Article
  • Open Access
4 Citations
2,621 Views
20 Pages

21 May 2024

The video synthetic aperture radar (ViSAR) system can utilize high-frame-rate scene motion target shadow information to achieve real-time monitoring of ground mobile targets. Modeling the characteristics of moving target shadows and analyzing shadow...

(This article belongs to the Special Issue SAR Images Processing and Analysis (2nd Edition))
  • Article
  • Open Access
10 Citations
5,887 Views
35 Pages

This study describes a comprehensive bibliometric analysis of shadow banking and financial contagion dynamics from 1996 to 2022. Through a holistic approach, our study focuses on quantifying the impact and uncovering significant trends in scientific...

  • Article
  • Open Access
5 Citations
5,928 Views
15 Pages

17 October 2019

One way for jurisdictions with limited analytic resources to increase their capability for doing cost–benefit analysis (CBA) is to use existing shadow prices, or “plug-ins”, for important social impacts. This article contributes to...

  • Article
  • Open Access
17 Citations
4,883 Views
27 Pages

Moving Target Shadow Analysis and Detection for ViSAR Imagery

  • Zhihua He,
  • Xing Chen,
  • Tianzhu Yi,
  • Feng He and ,
  • Zhen Dong and
  • Yue Zhang
  • + 1 author+ 0 author

31 July 2021

The video synthetic aperture radar (ViSAR) is a new application in radar techniques. ViSAR provides high- or moderate-resolution SAR images with a faster frame rate, which permits the detection of the dynamic changes in the interested area. A moving...

(This article belongs to the Topic High-Resolution Earth Observation Systems, Technologies, and Applications)
  • Article
  • Open Access
2,553 Views
17 Pages

15 January 2025

Shadow flicker caused by wind turbine blades passing through sunlight can significantly affect nearby residential buildings, raising environmental and regulatory concerns in wind farm development. The accurate assessment of shadow flicker exposure is...

(This article belongs to the Special Issue Simulation Modelling and Analysis of a Renewable Energy System, Volume II)
  • Article
  • Open Access
2 Citations
1,192 Views
36 Pages

Effects of Clouds and Shadows on the Use of Independent Component Analysis for Feature Extraction

  • Marcos A. Bosques-Perez,
  • Naphtali Rishe,
  • Thony Yan,
  • Liangdong Deng and
  • Malek Adjouadi

29 July 2025

One of the persistent challenges in multispectral image analysis is the interference caused by dense cloud cover and its resulting shadows, which can significantly obscure surface features. This becomes especially problematic when attempting to monit...

(This article belongs to the Section Environmental Remote Sensing)
  • Review
  • Open Access
9 Citations
7,915 Views
25 Pages

Review of Heliodon Developments and Computational Tools for Building Shadow Analysis

  • Lizbeth Salgado-Conrado,
  • Areli Lopez-Montelongo,
  • Carlos Alvarez-Macias and
  • Jose Hernadez-Jaquez

In the last decade, the analysis of shading or sunlight in architectural projects has become an important role in improving building thermal and lighting performances. Selecting an appropriate software tool for this type of analysis is a challenging...

(This article belongs to the Topic Building Energy Efficiency)
  • Article
  • Open Access
7 Citations
3,682 Views
31 Pages

10 August 2023

Analysis of aerial images provided by satellites enables continuous monitoring and is a central component of many applications, including precision farming. Nonetheless, this analysis is often impeded by the presence of clouds and cloud shadows, whic...

(This article belongs to the Section Atmospheric Remote Sensing)
  • Article
  • Open Access
1 Citations
1,468 Views
20 Pages

28 August 2025

Reducing emissions through the invisible hand of the market has become an important way to promote sustainable environmental development. The shadow price of carbon dioxide (CO2) is the core element of the carbon market, and its accuracy depends on t...

  • Article
  • Open Access
11 Citations
8,165 Views
15 Pages

13 March 2015

This paper extends prior research on energy inefficiency in China by utilizing a unique shadow price framework allocation in 30 Chinese provinces. We estimate the shadow price for energy input using the framework of production, and use the ratio of t...

(This article belongs to the Special Issue Energy Policy and Climate Change)
  • Article
  • Open Access
3 Citations
1,244 Views
32 Pages

27 March 2025

In this paper, we investigate the shadow properties of a rotating black hole with a weakly coupled global monopole charge using a modified Newman–Janis algorithm. This study explores how these charge and rotational effects shape the black hole&...

(This article belongs to the Section Gravitation)
  • Article
  • Open Access
60 Citations
8,868 Views
15 Pages

25 November 2021

The advancement in fintech technological development in emerging countries has accelerated the role of digital finance in economic development. Digital finance assists in financial inclusion; however, it may also increase the chances of financial ins...

(This article belongs to the Special Issue Mathematics and Mathematical Physics Applied to Financial Markets)
  • Article
  • Open Access
550 Views
19 Pages

Shadow Size Distribution Analysis for Automated Classification of Wood Chip Particle Size Distribution Under Bulk Conditions

  • Thomas Gasperini,
  • Manuela Mancini,
  • Elena Provinciali,
  • Gloria Ficosecco and
  • Giuseppe Toscano

23 May 2026

Italy is one of Europe’s largest consumers of wood pellets, while domestic production remains comparatively limited. In parallel, wood chips (WC) represent a strategic biofuel for power generation, where particle size distribution (PSD) affects...

(This article belongs to the Special Issue Sustainable Development Goal 7: Biofuel Production from Biomass Conversion)
  • Article
  • Open Access
3,281 Views
36 Pages

Investigating Reinforcement Shadow Visibility on Formed Concrete Surfaces Using Visual Inspection and Colour Variation Analysis

  • Ignas Šliogeris,
  • Donatas Rekus,
  • Svajūnas Juočiūnas,
  • Ruben Paul Borg and
  • Mindaugas Daukšys

31 March 2025

The research presented in this article seeks to identify the possible causes of reinforcement shadows (RS) on the surface of concrete test specimen produced under laboratory conditions. Different hypotheses about RS were selected based on factory pra...

(This article belongs to the Section Building Structures)
  • Article
  • Open Access
61 Citations
11,873 Views
16 Pages

19 May 2019

Shadows exist universally in sunlight-source remotely sensed images, and can interfere with the spectral morphological features of green vegetations, resulting in imprecise mathematical algorithms for vegetation monitoring and physiological diagnoses...

(This article belongs to the Special Issue UAV Applications in Forestry)
  • Article
  • Open Access
2,227 Views
16 Pages

Posterior acoustic shadowing is a fundamental physical phenomenon associated with calcified stones in ultrasound image, yet it has not been fully exploited in automated ultrasound analysis. This study aimed to develop an explainable, semi-automatic r...

(This article belongs to the Section Medical Imaging)
  • Article
  • Open Access
2 Citations
1,003 Views
15 Pages

Posterior acoustic shadowing is a key diagnostic feature in ultrasound imaging of calcified lesions, such as gallbladder and kidney stones. However, conventional assessment relies primarily on qualitative interpretation, and its underlying structural...

  • Article
  • Open Access
1 Citations
814 Views
17 Pages

Accurate assessment of light properties is essential and is measured with photometric and colorimetric standardized methods. However, the spatial characteristic of light—harshness—remains difficult to quantify. Building on the authors&rsq...

(This article belongs to the Section Image and Video Processing)
  • Proceeding Paper
  • Open Access
617 Views
7 Pages

In developing countries, the informal economy represents 30 to 60 percent of gross domestic product and employs more than half of the workforce, yet its role in moderating the benefits of international trade remains underexplored. This study investig...

(This article belongs to the Proceedings of The 12th International Conference on Time Series and Forecasting)
  • Article
  • Open Access
8 Citations
3,924 Views
17 Pages

Detection and Classification of Buildings by Height from Single Urban High-Resolution Remote Sensing Images

  • Hongya Zhang,
  • Chi Xu,
  • Zhongjie Fan,
  • Wenzhuo Li and ,
  • Kaimin Sun and
  • Deren Li
  • + 1 author+ 0 author

27 September 2023

Recent improvements in remote sensing technologies have boosted building detection techniques from rough classifications using moderate resolution imagery to precise extraction from high-resolution imagery. Shadows frequently emerge in high-resolutio...

(This article belongs to the Special Issue Applications of Remote Sensing and GIS in Land and Soil Resources)
  • Article
  • Open Access
155 Citations
10,645 Views
23 Pages

30 March 2020

Although various linear log-distance path loss models have been developed for wireless sensor networks, advanced models are required to more accurately and flexibly represent the path loss for complex environments. This paper proposes a machine learn...

(This article belongs to the Section Sensor Networks)
  • Article
  • Open Access
4 Citations
5,960 Views
12 Pages

26 March 2025

Background/Objectives: Accurate diagnosis during ultrasound examinations of patients with kidney and gallbladder stones is crucial. Although stone areas typically show posterior acoustic shadowing on ultrasound images, their accurate diagnosis can be...

(This article belongs to the Section Clinical Research Methods)
  • Article
  • Open Access
27 Citations
9,925 Views
14 Pages

6 July 2016

Sky View Factor (SVF, a dimensionless value between 0 and 1 representing obstructed and unobstructed sky, respectively) has an important influence on urban energy balance, and is a key contributor to the Urban Heat Island (UHI) effect experienced by...

(This article belongs to the Special Issue Remote Sensing of Human-Environment Interactions along the Urban-Rural Gradient)
  • Article
  • Open Access
96 Citations
14,213 Views
21 Pages

Making Landsat Time Series Consistent: Evaluating and Improving Landsat Analysis Ready Data

  • Shi Qiu,
  • Yukun Lin,
  • Rong Shang,
  • Junxue Zhang and ,
  • Lei Ma and
  • Zhe Zhu
  • + 1 author+ 0 author

29 December 2018

Recently, the United States Geological Survey (USGS) has released a new dataset, called Landsat Analysis Ready Data (ARD), which is designed specifically for facilitating time series analysis. In this study, we evaluated the temporal consistency of t...

(This article belongs to the Special Issue Science of Landsat Analysis Ready Data)
  • Article
  • Open Access
8 Citations
5,466 Views
29 Pages

Due to the growth of the “urban shadow”, farming systems in metropolitan areas (MAs) are characterized by specific environmental, economic, and social pressures. Urbanization pressure and its related threats, as well as the opportunities resulting fr...

(This article belongs to the Special Issue Recent Advances in Technological and Agronomic Practices for Sustainable Agriculture)
  • Article
  • Open Access
12 Citations
2,977 Views
15 Pages

30 March 2023

This paper improves energy efficiency and communications reliability for wireless transmission under κ-μ shadowed fading (i.e., integrating all channel impairments including path loss, shadowing, fading) and hardware impairment by employing...

(This article belongs to the Special Issue RF Energy Harvesting and Wireless Power Transfer for IoT)
  • Article
  • Open Access
5 Citations
3,904 Views
26 Pages

28 June 2018

Hydraulic fracturing has been applied in the cave mining industry with the purpose of re-creating an orebody rock mass condition that is suitable for caving. Prescribed hydraulic fracturing was proposed in a previous study as a supplement to the conv...

  • Feature Paper
  • Article
  • Open Access
3 Citations
4,644 Views
16 Pages

13 April 2020

In this paper, we consider the effect of stochastic uncertainties on non-linear systems with chaotic behavior. More specifically, we quantify the effect of parametric uncertainties to time-averaged quantities and their sensitivities. Sampling methods...

(This article belongs to the Special Issue Methods and Applications of Uncertainty Quantification in Engineering and Science)
  • Article
  • Open Access
517 Views
28 Pages

Refined 3D Urban Building Reconstruction from TomoSAR Point Clouds via Multi-Level Geometric Priors and Shadow Analysis

  • Wenkang Liu,
  • Haoyuan Chen,
  • Jinsong Zhang,
  • Cheng Qian and ,
  • Gang Xu,
  • Ning Li,
  • Guangcai Sun and
  • Mengdao Xing
  • + 3 authors+ 0 author

25 June 2026

Reconstructing building models from urban SAR tomography (TomoSAR) point clouds is often constrained by limited resolution, low positioning accuracy in elevation, as well as data incompleteness and artifacts caused by microwave imaging mechanisms. Th...

(This article belongs to the Special Issue Sensors in 2026)
  • Article
  • Open Access
585 Views
22 Pages

10 September 2026

Lumpy skin disease (LSD) is a rapidly spreading viral disease of cattle that threatens livestock productivity and agricultural trade across Africa, the Middle East, and Asia. Despite effective vaccines being available, evidence-based guidance on allo...

(This article belongs to the Section Computational and Numerical Mathematics)
  • Article
  • Open Access
12 Citations
4,952 Views
16 Pages

TCA Cycle and Its Relationship with Clavulanic Acid Production: A Further Interpretation by Using a Reduced Genome-Scale Metabolic Model of Streptomyces clavuligerus

  • Howard Ramirez-Malule,
  • Víctor A. López-Agudelo,
  • David Gómez-Ríos,
  • Silvia Ochoa and ,
  • Rigoberto Ríos-Estepa,
  • Stefan Junne and
  • Peter Neubauer
  • + 2 authors+ 0 author

Streptomyces clavuligerus (S. clavuligerus) has been widely studied for its ability to produce clavulanic acid (CA), a potent inhibitor of β-lactamase enzymes. In this study, S. clavuligerus cultivated in 2D rocking bioreactor in fed-batch operation...

(This article belongs to the Special Issue Strategies for the Efficient Development of Microbial Bioprocesses)
  • Article
  • Open Access
7 Citations
2,922 Views
21 Pages

Low Resistance Hot-Spot Diagnosis and Suppression of Photovoltaic Module Based on I-U Characteristic Analysis

  • Qiang Ge,
  • Zhenzhi Li,
  • Ziming Sun,
  • Jin Xu and ,
  • Heng Long and
  • Tao Sun
  • + 1 author+ 0 author

27 May 2022

In the hot-spot fault of photovoltaic modules, there is a low resistance hot-spot fault caused by crystal defects, such as internal crack and PN junction failure. When the faulty area is partially shaded, it will produce severe temperature rise, acce...

(This article belongs to the Special Issue Control in Mechanical-Electrical Energy Conversion System)
  • Article
  • Open Access
23 Citations
7,568 Views
14 Pages

A Field-Portable Cell Analyzer without a Microscope and Reagents

  • Dongmin Seo,
  • Sangwoo Oh,
  • Moonjin Lee,
  • Yongha Hwang and
  • Sungkyu Seo

29 December 2017

This paper demonstrates a commercial-level field-portable lens-free cell analyzer called the NaviCell (No-stain and Automated Versatile Innovative cell analyzer) capable of automatically analyzing cell count and viability without employing an optical...

(This article belongs to the Special Issue Point of Care Sensors)
  • Article
  • Open Access
1 Citations
4,211 Views
21 Pages

Assessing Fiscal Risk: Hidden Structures of Illicit Tobacco Trade Across the European Union

  • Evgenia Anastasiou,
  • George Theodossiou,
  • Andreas Koutoupis,
  • Stella Manika and
  • Konstantinos Karalidis

This paper investigates the risk determinants and spatial patterns of tax revenue loss due to illicit tobacco consumption across the 27 EU Member States from 2017 to 2022. Using a panel dataset covering economic, demographic, social, political, and b...

(This article belongs to the Section Economics and Finance)
  • Article
  • Open Access
11 Citations
5,356 Views
11 Pages

The correlation of the architectural form and the structural system should be the basis for rational shaping. This paper presents algorithmic-aided shaping curvilinear steel bar structures for roofs, using modern digital tools, working in the environ...

(This article belongs to the Special Issue Responsive Architecture)
  • Article
  • Open Access
10 Citations
5,564 Views
14 Pages

Since the agriculture sector, such as Italian grapevine production, exert a pressure on the environment to some extent, this research aims to evaluate the environmental impacts and estimate the societal costs of four current grapevine production syst...

(This article belongs to the Special Issue Advancements in the Sustainable Viticulture of Grapes)
  • Article
  • Open Access
3 Citations
3,140 Views
15 Pages

1 March 2023

Quantifying the shadow price (SP) of CO2 emissions is the key to achieving China’s “double carbon” targets. Considering technology heterogeneity, this study applies stochastic frontier analysis combined with meta-frontier technology...

(This article belongs to the Special Issue Current Advances in Green Governance and CO2 Emissions towards Sustainable Development)
  • Article
  • Open Access
35 Citations
5,147 Views
25 Pages

29 April 2018

China’s electricity sector mainly relies on coal-fired thermal generation, thus resulting that nearly 50% of China’s total CO2 emissions coming from the electricity sector. This study focuses on the provincial CO2 emissions from China&rsq...

  • Article
  • Open Access
19 Citations
6,429 Views
15 Pages

Machine Learning Based Lens-Free Shadow Imaging Technique for Field-Portable Cytometry

  • Rajkumar Vaghashiya,
  • Sanghoon Shin,
  • Varun Chauhan,
  • Kaushal Kapadiya and ,
  • Smit Sanghavi,
  • Sungkyu Seo and
  • Mohendra Roy
  • + 2 authors+ 0 author

27 February 2022

The lens-free shadow imaging technique (LSIT) is a well-established technique for the characterization of microparticles and biological cells. Due to its simplicity and cost-effectiveness, various low-cost solutions have been developed, such as autom...

(This article belongs to the Special Issue Intelligent Biosignal Processing in Wearable and Implantable Sensors)
  • Article
  • Open Access
17 Citations
7,263 Views
19 Pages

17 December 2015

Due to the increasing scarcity of fossil fuels and the upwards trend in energy costs over time, many countries—especially in Europe—have begun to modify their energy policies aiming to increase that percentage obtained from renewable energies. The EA...

  • Article
  • Open Access
3 Citations
1,275 Views
14 Pages

Shadow Analysis of Photovoltaic Systems Deployed Near Obscuring Walls

  • Joseph Appelbaum,
  • Assaf Peled and
  • Avi Aronescu

11 September 2025

As photovoltaic (PV) deployment has expanded from rural sites to the built environment, rooftops are increasingly used for electricity generation. In these settings, the visible sky is often partially obstructed by adjacent walls, producing shading t...

(This article belongs to the Special Issue Recent Advances in Renewable Energy Generation Technologies and Power Demand Response: 2nd Edition)
  • Article
  • Open Access
591 Views
31 Pages

Aquaponic systems couple fish and plant production in recirculating loops, yet quantitatively assessed dynamic models for engineering analysis, scale-up, and operation under realistic conditions remain limited. Here, a modular process-based MATLAB R2...

  • Article
  • Open Access
42 Citations
10,900 Views
20 Pages

5 June 2020

Forests play major roles in climate regulation, ecosystem services, carbon storage, biodiversity, terrain stabilization, and water retention, as well as in the economy of numerous countries. Nevertheless, deforestation and forest degradation are ramp...

(This article belongs to the Special Issue Sentinel Analysis Ready Data (Sentinel ARD))
  • Feature Paper
  • Review
  • Open Access
5 Citations
5,625 Views
20 Pages

Light and Shadow in Near-Infrared Spectroscopy: A Powerful Tool for Cannabis sativa L. Analysis

  • María del Carmen Díaz-Liñán,
  • Verónica Sánchez de Medina,
  • Carlos Ferreiro-Vera and
  • María Teresa García-Valverde

29 November 2023

Cannabis sativa L. is an ancient cultivar that has found applications in various fields, e.g., medicine, due to its beneficial effects. However, due to its psychotropic effects, the regulation of this cultivar has increased throughout the decades. In...

  • Article
  • Open Access
25 Citations
9,754 Views
19 Pages

11 October 2018

Miniaturized wireless sensors are designed to run on limited power resources, requiring minimization of transmit power and lowering of the fade margin in the link budget. One factor that has an important impact on wireless sensor network design is pa...

(This article belongs to the Special Issue Small Devices and the High-Tech Society)
  • Article
  • Open Access
3 Citations
3,931 Views
19 Pages

Secrecy Analysis of LEO Satellite-to-Ground Station Communication System Influenced by Gamma-Shadowed Ricean Fading

  • Ivan Radojkovic,
  • Jelena Anastasov,
  • Dejan N. Milic,
  • Predrag Ivaniš and
  • Goran T. Djordjevic

The Low Earth Orbit (LEO) small satellites are extensively used for global connectivity to enable services in underpopulated, remote or underdeveloped areas. Their inherent broadcast nature exposes LEO–terrestrial communication links to severe...

(This article belongs to the Special Issue New Advances of Microwave and Optical Communication)
  • Article
  • Open Access
20 Citations
5,200 Views
19 Pages

10 October 2023

In urban thermal environment research (UTE), urban shadows formed by buildings and trees contribute to significant variations in thermal conditions, particularly during the mid-day period. This study investigated the multi-scale effects of indicators...

(This article belongs to the Special Issue Remote Sensing Applications for Interaction between Urbanization and Eco-Environment)
  • Article
  • Open Access
4 Citations
3,669 Views
20 Pages

4 May 2024

As a critical technological approach, multistage fracturing is frequently used to boost gas recovery in compact hydrocarbon reservoirs. Determining an ideal cluster distance that effectively integrates pre-existing natural fractures in the deposit cr...

(This article belongs to the Special Issue Thermo-Hydro-Mechanical Coupling in Fractured Porous Media)
  • Article
  • Open Access
7 Citations
4,876 Views
14 Pages

A basic feature of modern and smart cities is their energetic sustainability, using clean and renewable energies and, therefore, reducing the carbon emissions, especially in large cities. Solar energy is one of the most important renewable energy sou...

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