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25 pages, 50028 KiB  
Article
Surface Reconstruction from SLAM-Based Point Clouds: Results from the Datasets of the 2023 SIFET Benchmark
by Antonio Matellon, Eleonora Maset, Alberto Beinat and Domenico Visintini
Remote Sens. 2024, 16(18), 3439; https://doi.org/10.3390/rs16183439 - 16 Sep 2024
Abstract
The rapid technological development that geomatics has been experiencing in recent years is leading to increasing ease, productivity and reliability of three-dimensional surveys, with portable laser scanner systems based on Simultaneous Localization and Mapping (SLAM) technology, gradually replacing traditional techniques in certain applications. [...] Read more.
The rapid technological development that geomatics has been experiencing in recent years is leading to increasing ease, productivity and reliability of three-dimensional surveys, with portable laser scanner systems based on Simultaneous Localization and Mapping (SLAM) technology, gradually replacing traditional techniques in certain applications. Although the performance of such systems in terms of point cloud accuracy and noise level has been deeply investigated in the literature, there are fewer works about the evaluation of their use for surface reconstruction, cartographic production, and as-built Building Information Model (BIM) creation. The objective of this study is to assess the suitability of SLAM devices for surface modeling in an urban/architectural environment. To this end, analyses are carried out on the datasets acquired by three commercial portable laser scanners in the context of a benchmark organized in 2023 by the Italian Society of Photogrammetry and Topography (SIFET). In addition to the conventional point cloud assessment, we propose a comparison between the reconstructed mesh and a ground-truth model, employing a model-to-model methodology. The outcomes are promising, with the average distance between models ranging from 0.2 to 1.4 cm. However, the surfaces modeled from the terrestrial laser scanning point cloud show a level of detail that is still unmatched by SLAM systems. Full article
19 pages, 1518 KiB  
Article
Assessing Ecological Compensation Policy Effectiveness: A Case Study in the Inner Mongolia Autonomous Region, China
by Yiwen Lu, Xining Yang and Yichun Xie
Sustainability 2024, 16(18), 8094; https://doi.org/10.3390/su16188094 (registering DOI) - 16 Sep 2024
Abstract
As a vital component of the terrestrial ecosystem, grassland accounts for one-third of the global vegetation system. Grassland degradation has been exacerbated due to extreme overgrazing in China’s Inner Mongolia Autonomous Region (IMAR). While conservation was carried out via the Ecological Subsidy and [...] Read more.
As a vital component of the terrestrial ecosystem, grassland accounts for one-third of the global vegetation system. Grassland degradation has been exacerbated due to extreme overgrazing in China’s Inner Mongolia Autonomous Region (IMAR). While conservation was carried out via the Ecological Subsidy and Award Program (ESAP) to mitigate grassland degradation, little is known about its effectiveness in improving the biophysical conditions of grassland. This paper integrates the conceptual frameworks of total socio-environmental systems (TSESs) to assess how ecological systems respond to the ESAP, investigate the spatial heterogeneity of the ESAP, and explore the meddling effects of socio-environmental interactions on the ESAP. We integrated ecological, climate, and socioeconomic data and developed several hierarchical linear mixed models (HLMMs) to investigate how these factors interact with the ESAP in the IMAR. Our findings prove that the above-ground biomass between 2011 and 2015 responds significantly to variations in socioeconomic conditions and ecological communities. Available land resources, hospital and medical facilities, and net farmer and herdsman income are the most critical factors positively related to grassland productivity. Primary industries like mining, total consumer retail value, farming, forestry, animal husbandry, fishery productions, and GDP are the most damaging factors affecting biomass. Our study recommends a regionally or locally tailored ecological recovery policy, instead of a generalized one, in future efforts to conserve grassland. Full article
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<p>Study area: Inner Mongolia Autonomous Region of China and 26 counties.</p>
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<p>The flow chart of the analysis.</p>
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<p>The graph that ranks the random effects at the county level.</p>
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<p>Spatial heterogeneity of the HLMM model. The figure is a map of residual interpolations in 26 counties.</p>
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36 pages, 716 KiB  
Article
Strong Convergence of Euler-Type Methods for Nonlinear Fractional Stochastic Differential Equations without Singular Kernel
by Zakaria Ali, Minyahil Abera Abebe and Talat Nazir
Mathematics 2024, 12(18), 2890; https://doi.org/10.3390/math12182890 - 16 Sep 2024
Abstract
In this paper, we first prove the existence and uniqueness of the solution to a variable-order Caputo–Fabrizio fractional stochastic differential equation driven by a multiplicative white noise, which describes random phenomena with non-local effects and non-singular kernels. The Euler–Maruyama scheme is extended to [...] Read more.
In this paper, we first prove the existence and uniqueness of the solution to a variable-order Caputo–Fabrizio fractional stochastic differential equation driven by a multiplicative white noise, which describes random phenomena with non-local effects and non-singular kernels. The Euler–Maruyama scheme is extended to develop the Euler–Maruyama method, and the strong convergence of the proposed method is demonstrated. The main difference between our work and the existing literature is the fact that our assumptions on the nonlinear external forces are those of one-sided Lipschitz conditions on both the drift and the nonlinear intensity of the noise as well as the proofs of the higher integrability of the solution and the approximating sequence. Finally, to validate the numerical approach, current results from the numerical implementation are presented to test the efficiency of the scheme used in order to substantiate the theoretical analysis. Full article
35 pages, 9740 KiB  
Article
Public’s Visual Preferences Survey Facilitates Community-Based Design and Color Standards Creation
by Karim Najar, Ola Nylander and William Woxnerud
Buildings 2024, 14(9), 2929; https://doi.org/10.3390/buildings14092929 - 16 Sep 2024
Abstract
According to research, there is a disparity in the aesthetic design preferences of the public and architects. This is especially noticeable in urban areas environments, where there is a wide range of demographic variables and a lack of active public involvement in decision-making. [...] Read more.
According to research, there is a disparity in the aesthetic design preferences of the public and architects. This is especially noticeable in urban areas environments, where there is a wide range of demographic variables and a lack of active public involvement in decision-making. The study included a visual preference survey to evaluate the perception and ranking of two dominant color schemes in local development projects in Stockholm across different age, ethnicity, and gender groups from Sweden. Over 400 people participated in the survey, which used photo-elicitation and a literature review. The objective was to determine the extent of divergence and disparities in the ranking of color schemes. The first dominant color schemes are a group of four analogous colors related to the Natural Color System’s (NSC’s) basic colors. The second is a group of four neutral colors that are related to grayscale colors. The study demonstrates that one could also measure building color schemes using visual preference ranking. Moreover, the research introduced a unique method for city planners to understand diverse ethnic, gender, and age group perceptions of color schemes in current projects, promoting active participation in decision-making and providing valuable insights. These insights can enhance people’s sense of belonging, a prerequisite for social sustainability, and improve the quality and profitability of future projects. Full article
(This article belongs to the Topic Sustainable Built Environment, 2nd Volume)
28 pages, 24699 KiB  
Article
Enhancing Autism Spectrum Disorder Classification with Lightweight Quantized CNNs and Federated Learning on ABIDE-1 Dataset
by Simran Gupta, Md. Rahad Islam Bhuiyan, Sadia Sultana Chowa, Sidratul Montaha, Rashik Rahman, Sk. Tanzir Mehedi and Ziaur Rahman
Mathematics 2024, 12(18), 2886; https://doi.org/10.3390/math12182886 - 16 Sep 2024
Abstract
Autism spectrum disorder (ASD) is a complex neurodevelopmental condition that presents significant diagnostic challenges due to its varied symptoms and nature. This study aims to improve ASD classification using advanced deep learning techniques applied to neuroimaging data. We developed an automated system leveraging [...] Read more.
Autism spectrum disorder (ASD) is a complex neurodevelopmental condition that presents significant diagnostic challenges due to its varied symptoms and nature. This study aims to improve ASD classification using advanced deep learning techniques applied to neuroimaging data. We developed an automated system leveraging the ABIDE-1 dataset and a novel lightweight quantized one-dimensional (1D) Convolutional Neural Network (Q-CNN) model to analyze fMRI data. Our approach employs the NIAK pipeline with multiple brain atlases and filtering methods. Initially, the Regions of Interest (ROIs) are converted into feature vectors using tangent space embedding to feed into the Q-CNN model. The proposed 1D-CNN is quantized through Quantize Aware Training (QAT). As the quantization method, int8 quantization is utilized, which makes it both robust and lightweight. We propose a federated learning (FL) framework to ensure data privacy, which allows decentralized training across different data centers without compromising local data security. Our findings indicate that the CC200 brain atlas, within the NIAK pipeline’s filt-global filtering methods, provides the best results for ASD classification. Notably, the ASD classification outcomes have achieved a significant test accuracy of 98% using the CC200 and filt-global filtering techniques. To the best of our knowledge, this performance surpasses previous studies in the field, highlighting a notable enhancement in ASD detection from fMRI data. Furthermore, the FL-based Q-CNN model demonstrated robust performance and high efficiency on a Raspberry Pi 4, underscoring its potential for real-world applications. We exhibit the efficacy of the Q-CNN model by comparing its inference time, power consumption, and storage requirements with those of the 1D-CNN, quantized CNN, and the proposed int8 Q-CNN models. This research has made several key contributions, including the development of a lightweight int8 Q-CNN model, the application of FL for data privacy, and the evaluation of the proposed model in real-world settings. By identifying optimal brain atlases and filtering methods, this study provides valuable insights for future research in the field of neurodevelopmental disorders. Full article
(This article belongs to the Special Issue Advances in Mathematics Computation for Software Engineering)
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Figure 1
<p>Proposed methodology diagram.</p>
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<p>Comparative analysis of functional connectomes in Autism Spectrum Disorder (ASD) and control participants.</p>
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<p>The architecture of proposed CNN model.</p>
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<p>The architecture of proposed Q-CNN. (<b>a</b>) Dense layer before quantization. (<b>b</b>) Dense layer after quantization.</p>
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<p>Federated learning framework based on CXR images where each client represents a hospital.</p>
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<p>Confusion matrix for CC200 atlas in filt-global filtering method.</p>
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<p>Accuracy and loss curve of CC200 atlas with TFLite Quantized CNN model in filt-global method.</p>
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<p>Confusion matrix for CC200 atlas in filt-noglobal filtering method.</p>
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<p>Accuracy and loss curves of CC200 atlas with Int8 Quantized CNN model in filt-noglobal method.</p>
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<p>Confusion matrix for CC200 atlas in nofilt-global filtering method.</p>
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<p>Accuracy and loss curves of CC200 atlas with Int8 Quantized CNN mod in nofilt-global method.</p>
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<p>Confusion matrix for CC200 atlas in nofilt-noglobal filtering method.</p>
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<p>Loss and accuracy curves of CC200 atlas with Int8 Quantized CNN mod in nofilt-noglobal method.</p>
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<p>Illustration of Flash Occupancy, Average Inference time, and Average power consumptions of pipelines.</p>
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20 pages, 5494 KiB  
Article
Spatial Influence of Digital Economy on Carbon Emission Efficiency of the Logistics Industry across 30 Provinces in China
by Yuxia Guo, Xue Wu, Heping Ding and Zhouyu Tian
Sustainability 2024, 16(18), 8086; https://doi.org/10.3390/su16188086 - 16 Sep 2024
Viewed by 80
Abstract
The logistics industry (LI) is a key pillar of the global economy, and its carbon emission efficiency (CEE) is crucial for achieving carbon neutrality. The rapid development of the digital economy (DE) has had a profound impact on the LI, but the spatial [...] Read more.
The logistics industry (LI) is a key pillar of the global economy, and its carbon emission efficiency (CEE) is crucial for achieving carbon neutrality. The rapid development of the digital economy (DE) has had a profound impact on the LI, but the spatial impact on its CEE is currently unclear and requires further research. Firstly, based on the collection of relevant data, we use the entropy weight method and linear weighted sum method to measure the level of development of the DE. Secondly, the SBM model is used to measure the CEE level of the LI. Using Moran’s I index model and OLS and GWR models, we analyze the impact and spatial distribution characteristics of the DE on the CEE of the LI and propose development strategies. The article uses statistical data from 30 provinces in China from 2013 to 2022 as an example to demonstrate the implementation process of the method. The results show that the DE has a positive impact on the CEE of the LI, and there are spatial differences. Based on this, this article proposes policy recommendations for the development of green and low-carbon logistics and digital logistics that are tailored to local conditions, providing theoretical and methodological support for low-carbon research in the LI, and providing reference for other countries and regions to explore the path of green and low-carbon transformation. Full article
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<p>Method application flow.</p>
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<p>Data application process.</p>
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<p>Level of development of China’s DE.</p>
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<p>Years 2013 and 2022 CEE of LI.</p>
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<p>The CEE values of the LI in the four major regions.</p>
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<p>Spatial distribution characteristics of regression coefficients in DE.</p>
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11 pages, 1951 KiB  
Article
Optimization of Non-Alloyed Backside Ohmic Contacts to N-Face GaN for Fully Vertical GaN-on-Silicon-Based Power Devices
by Youssef Hamdaoui, Sofie S. T. Vandenbroucke, Sondre Michler, Katir Ziouche, Matthias M. Minjauw, Christophe Detavernier and Farid Medjdoub
Micromachines 2024, 15(9), 1157; https://doi.org/10.3390/mi15091157 - 15 Sep 2024
Viewed by 287
Abstract
In the framework of fully vertical GaN-on-Silicon device technology development, we report on the optimization of non-alloyed ohmic contacts on the N-polar n+-doped GaN face backside layer. This evaluation is made possible by using patterned TLMs (Transmission Line Model) through direct laser writing [...] Read more.
In the framework of fully vertical GaN-on-Silicon device technology development, we report on the optimization of non-alloyed ohmic contacts on the N-polar n+-doped GaN face backside layer. This evaluation is made possible by using patterned TLMs (Transmission Line Model) through direct laser writing lithography after locally removing the substrate and buffer layers in order to access the n+-doped backside layer. As deposited non-alloyed metal stack on top of N-polar orientation GaN layer after buffer layers removal results in poor ohmic contact quality. To significantly reduce the related specific contact resistance, an HCl treatment is applied prior to metallization under various time and temperature conditions. A 3 min HCl treatment at 70 °C is found to be the optimum condition to achieve thermally stable high ohmic contact quality. To further understand the impact of the wet treatment, SEM (Scanning Electron Microscopy) and XPS (X-ray Photoelectron Spectroscopy) analyses were performed. XPS revealed a decrease in Ga-O concentration after applying the treatment, reflecting the higher oxidation susceptibility of the N-polar face compared to the Ga-polar face, which was used as a reference. SEM images of the treated samples show the formation of pyramids on the N-face after HCl treatment, suggesting specific wet etching planes of the GaN crystal from the N-face. The size of the pyramids is time-dependent; thus, increasing the treatment duration results in larger pyramids, which explains the degradation of ohmic contact quality after prolonged high-temperature HCl treatment. Full article
(This article belongs to the Section D1: Semiconductor Devices)
16 pages, 5033 KiB  
Article
Dual-Action Calcium Monoaluminate Enabled Room-Temperature Curing of Inorganic Phosphate-Based High-Temperature Adhesive
by Zhuo Dong, Lei Zhang, Ke Yang, Zhenggang Fang, Yaru Ni, Yang Li and Chunhua Lu
Materials 2024, 17(18), 4542; https://doi.org/10.3390/ma17184542 - 15 Sep 2024
Viewed by 274
Abstract
High-temperature adhesives find extensive application in diverse domains, encompassing repairs, production processes, and material joining. However, achieving their curing at ambient temperatures remains a formidable challenge due to the inherent requirement of elevated temperatures, typically exceeding 500 °C, for the curing reaction. To [...] Read more.
High-temperature adhesives find extensive application in diverse domains, encompassing repairs, production processes, and material joining. However, achieving their curing at ambient temperatures remains a formidable challenge due to the inherent requirement of elevated temperatures, typically exceeding 500 °C, for the curing reaction. To overcome this limitation, in this study, we developed a distinctive inorganic phosphate-based composite adhesive by incorporating dual-functional calcium monoaluminate (CA) into a traditional adhesive blend comprising Al(H2PO4)3 and MgO. This distinctive approach significantly diminishes the curing temperature, enabling it to occur at room temperature. Firstly, CA’s facile hydration reaction effectively scavenges surrounding water molecules, thereby accelerating the dehydration curing process of Al(H2PO4)3. Secondly, as hydration is an exothermic process, it locally generates heat around the Al(H2PO4)3, fostering optimal conditions for its curing reaction. Moreover, the adhesive’s strength is substantially bolstered through the strategic inclusion of Nano-Al2O3 (enhancing the availability of reaction sites) and Nano-SiO2 (improving overall stability). As a demonstration, the adhesive formulation with added CA containing 2% Nano-Al2O3 and 2% Nano-SiO2 achieved a remarkable tensile strength of 32.48 MPa at room temperature, underscoring its potential as an efficient solution for various practical adhesive applications. The adhesive prepared in this study harnesses the hydration properties of CA to absorb moisture and release substantial heat, introducing a novel method for ambient temperature curing. This development promises to broaden its applications in refractory materials, coatings, and equipment repair. Full article
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Graphical abstract

Graphical abstract
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<p>Mechanism diagram of hydration reaction of adhesive.</p>
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<p>Process for preparing the inorganic phosphate adhesive.</p>
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<p>Schematic diagram of tensile strength test.</p>
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<p>XRD patterns of samples synthesized at different sintering temperatures.</p>
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<p>SEM images of synthetic samples at different sintering temperatures: (<b>a</b>,<b>d</b>) 1000 °C; (<b>b</b>,<b>e</b>) 1100 °C; (<b>c</b>,<b>f</b>) 1200 °C.</p>
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<p>(<b>a</b>) Thermogravimetric curve and (<b>b</b>) differential scanning calorimetry curve of the samples in <a href="#materials-17-04542-t001" class="html-table">Table 1</a>.</p>
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<p>(<b>a</b>) Thermogravimetric curve and (<b>b</b>) differential scanning calorimetry curve of the samples in <a href="#materials-17-04542-t001" class="html-table">Table 1</a>.</p>
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<p>Hydration heat curves of CA solution at 30 °C.</p>
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<p>XRD patterns of phosphate-based composite binder before (<b>a</b>) and after heat treatment (200 °C for 2 h) (<b>b</b>).</p>
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<p>Crystal transformation during heat treatment process.</p>
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<p>Surface morphology diagram of samples (<b>a</b>–<b>d</b>) after hydration and (<b>e</b>–<b>h</b>) after heat treatment.</p>
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<p>Scanning electron microscopy of samples (<b>a</b>–<b>h</b>) after hydration and (<b>i</b>–<b>p</b>) after heat treatment.</p>
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<p>Energy-dispersive spectrometry of samples after hydration. ((<b>a</b>)-S<sub>1</sub>, (<b>b</b>)-S<sub>2</sub>, (<b>c</b>)-S3, (<b>d</b>)-S<sub>4</sub>).</p>
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<p>XPS spectrum of hydration samples before (<b>a</b>,<b>c</b>,<b>e</b>) and after heat treatment (200 °C for 2 h) (<b>b</b>,<b>d</b>,<b>f</b>).</p>
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<p>XPS spectrum of hydration samples before (<b>a</b>,<b>c</b>,<b>e</b>) and after heat treatment (200 °C for 2 h) (<b>b</b>,<b>d</b>,<b>f</b>).</p>
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<p>Tensile strength of bonded samples after room-temperature curing and high-temperature test.</p>
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30 pages, 2659 KiB  
Article
Variability in Heating Demand Predictions: A Comparative Study of PHPP and Mc001-2022 in Existing Residential Buildings
by Sebastian George Maxineasa, Dorina Nicolina Isopescu, Ioana-Roxana Vizitiu-Baciu, Alexandra Cojocaru and Ligia Mihaela Moga
Buildings 2024, 14(9), 2923; https://doi.org/10.3390/buildings14092923 - 15 Sep 2024
Viewed by 242
Abstract
The construction industry is a key driver of environmental change due to its extensive use of resources and high emissions, thus significantly burdening global efforts towards sustainable development targets. A large portion of the environmental footprint of buildings results from the energy required [...] Read more.
The construction industry is a key driver of environmental change due to its extensive use of resources and high emissions, thus significantly burdening global efforts towards sustainable development targets. A large portion of the environmental footprint of buildings results from the energy required to sustain indoor comfort levels. Thus, enhancing the energy efficiency of existing buildings becomes critical in reducing their environmental impact. This study explores the impact of thermal performance improvements on the heating demand, employing numerical modeling and two energy performance methodologies, PHPP and Mc001-2022, across various climatic datasets and case studies in Romania. The results show substantial variability in heating demand predictions: Mc001-2022 predicts up to 27.2% higher continuous heating demands and 21.0% higher intermittent demands compared to PHPP in one case study. In the second case study, the differences range from 8.1% higher to 6.9% lower for continuous heating and from 3.3% higher to 9.9% lower for intermittent heating, depending on the scenario. These findings underscore the importance of the methodological choice and localized climatic data in heating demand assessments, highlighting the need for a tailored, context-specific approach to energy performance assessment, integrating multiple energy efficiency measures suited to the unique characteristics of each building. Full article
(This article belongs to the Special Issue Zero-Emission Buildings and the Sustainable Built Environment)
24 pages, 1433 KiB  
Review
Unconventional Edible Plants of the Amazon: Bioactive Compounds, Health Benefits, Challenges, and Future Trends
by Cynthia Tereza Corrêa da Silva Miranda, Stephanie Dias Soares, Williara Queiroz de Oliveira, Adriana de Souza Lima, Iramaia Angélica Neri Numa and Gláucia Maria Pastore
Foods 2024, 13(18), 2925; https://doi.org/10.3390/foods13182925 - 15 Sep 2024
Viewed by 356
Abstract
The pursuit of an improved quality of life is a major trend in the food market. This is driving the reformulation of the industry’s product portfolio, with the aim of providing nourishment while also contributing to beneficial health metabolic processes. In this context, [...] Read more.
The pursuit of an improved quality of life is a major trend in the food market. This is driving the reformulation of the industry’s product portfolio, with the aim of providing nourishment while also contributing to beneficial health metabolic processes. In this context, the use of local biodiversity and the recovery of the traditional knowledge associated with the consumption of vegetables that grow spontaneously in nature emerge as more sustainable and nutritionally adequate concepts. The Amazon region is known for its abundant biodiversity, housing numerous unconventional food plants whose nutritional and biological properties remain unknown due to a lack of research. Among the different species are Xanthosoma sagittifolium, Acmella oleracea, Talinum triangulare, Pereskia bleo, Bidens bipinnata, and Costus spiralis. These species contain bioactive compounds such as apigenin, syringic acid, spilanthol, and lutein, which provide various health benefits. There are few reports on the biological effects, nutritional composition, bioactive compounds, and market prospects for these species. Therefore, this review provides an overview of their nutritional contribution, bioactive compounds, health benefits, and current market, as well as the use of new technologies that can contribute to the development of functional products/ingredients derived from them. Full article
(This article belongs to the Section Plant Foods)
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<p>Unconventional food plants commonly found at fairs and markets in the Amazon region: (<b>A</b>) <span class="html-italic">Xanthosoma sagittifolium</span>; (<b>B</b>) <span class="html-italic">Acmella oleracea</span>; (<b>C</b>) <span class="html-italic">Talinum triangulare</span>; (<b>D</b>) <span class="html-italic">Pereskia bleo</span>; (<b>E</b>) <span class="html-italic">Bidens bipinnata</span>; and (<b>F</b>) <span class="html-italic">Costus spiralis</span>. Source: Natália Santos Reis da Cunha (<b>A</b>), Sebastião Rebelo de Miranda (<b>B</b>), and Cynthia Tereza Corrêa da Silva Miranda (<b>C</b>–<b>F</b>).</p>
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<p>Chemical structure of some bioactive compounds found in unconventional vegetables from the Amazon region.</p>
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27 pages, 10763 KiB  
Article
Walkability in Riyadh: A Comprehensive Assessment and Implications for Sustainable Community—Al-Falah Case Study
by Majd Homoud and Ola M. Jarrar
Sustainability 2024, 16(18), 8073; https://doi.org/10.3390/su16188073 - 15 Sep 2024
Viewed by 326
Abstract
This paper focuses on studying the concept of walkability in Riyadh, Saudi Arabia, after the implementation of the Humanizing Neighborhoods Initiative. Al-Falah neighborhood was selected as a case study because it was one of the first neighborhoods to implement walkability strategies. By adopting [...] Read more.
This paper focuses on studying the concept of walkability in Riyadh, Saudi Arabia, after the implementation of the Humanizing Neighborhoods Initiative. Al-Falah neighborhood was selected as a case study because it was one of the first neighborhoods to implement walkability strategies. By adopting a qualitative critical approach, this research collected data through a literature review and on-site observation to assess walkability in the neighborhood. Analysis of the observations highlighted the challenges and opportunities of walkability in Riyadh and the wider Gulf cities. Recommendations for promoting walkable communities in Riyadh include enhancing pedestrian infrastructure, incorporating mixed-use developments, integrating green infrastructure, implementing smart urban planning principles, and integrating public transportation systems. This paper emphasizes the importance of community engagement, preserving local identity, and involving various stakeholders to transform Riyadh into a pedestrian-friendly city that prioritizes public health and sustainability. Full article
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<p>Methodology of investigation. Source: Authors.</p>
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<p>Themes of walkability. Source: Authors.</p>
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<p>The relationship between criteria of the themes of walkability and their contribution to mitigating challenges to creating walkable communities in Riyadh. Source: Authors.</p>
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<p>(<b>a</b>) Al-Falah neighborhood location in the City of Riyadh; (<b>b</b>) Al-Falah neighborhood’s urban features. Source: Authors’ modification from Google Earth.</p>
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<p>Quarters and main streets of Al-Falah neighborhood. Source: Authors’ modification from Google Earth.</p>
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<p>Measures to mitigate vehicle speed: (<b>a</b>) Signage of speed limits and paved roads; (<b>b</b>) Pedestrian crossing; (<b>c</b>) Raised pedestrian crosswalks in Al-Falah neighborhood. Source: Authors.</p>
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<p>(<b>a</b>) Paved sidewalks; (<b>b</b>) Curb ramps that facilitate and encourage walking; (<b>c</b>) Gaps between the raised crossings and the sidewalk. Source: Authors.</p>
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<p>(<b>a</b>) Clearly identified and extensive pedestrian crossings; (<b>b</b>,<b>c</b>) Cars using the sidewalks for parking; (<b>d</b>) Intersecting routes of vehicles and pedestrians interrupting the pedestrian movement; (<b>e</b>,<b>f</b>) Private houses use the sidewalks for parking. Source: Authors.</p>
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<p>Lighting of (<b>a</b>) main street, (<b>b</b>) neighborhood core, and (<b>c</b>) a secondary street. Source: Authors.</p>
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<p>Demographic and urban features of Al-Falah neighborhood: (<b>a</b>) gender; (<b>b</b>) age; (<b>c</b>) neighborhood dimensions. Source for (<b>a</b>,<b>b</b>): Authors, for (<b>c</b>): Authors’ modification from Google Earth.</p>
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<p>Window placements and transparency scenarios to reduce visual flow between inside and outside in private houses and apartment buildings: (<b>a</b>,<b>c</b>) using high walls and landscaping; (<b>b</b>) raising party walls; (<b>c</b>) covering windows with aluminum shutters; (<b>d</b>,<b>f</b>) reducing the ratio of void compared to the solid; (<b>e</b>) CCTV cameras to monitor the street. Source: Authors.</p>
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<p>(<b>a</b>) Orthogonal grid system of Al-Falah neighborhood and highways at its edges; (<b>b</b>,<b>c</b>) High connectivity within the neighborhood. Source: Authors.</p>
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<p>Street furniture in Al-Falah neighborhood: (<b>a</b>) Concrete benches in the neighborhood core; (<b>b</b>) No setting areas on streets; (<b>c</b>) Electric bikes and scooters at the neighborhood core. Source: Authors.</p>
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<p>(<b>a</b>,<b>b</b>) The use of trees in main streets of Al-Falah neighborhood; (<b>c</b>) Soft landscaping planted by private house owners on secondary streets. Source: Authors.</p>
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<p>(<b>a</b>) Human scale environment; (<b>b</b>) Well-maintained streets; (<b>c</b>) Efficient use of signs; (<b>d</b>,<b>e</b>) No distinct identity of the neighborhood; (<b>f</b>) Unattractive streetscapes of Al-Falah neighborhood. Source: Authors.</p>
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<p>(<b>d</b>) Al-Falah neighborhood attractive destinations; (<b>a</b>) The Sports Boulevard and metro station; (<b>b</b>) Park in quarter 1; (<b>e</b>) Park in quarter 2; (<b>c</b>) Supermarkets, café, and laundry at the neighborhood core. Source: Map: Authors’ modification from Google Earth; photos: Authors.</p>
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<p>(<b>a</b>) Soft landscaping on main street; (<b>b</b>) Soft landscaping in neighborhoods; (<b>c</b>) Hard landscaping in Al-Falah neighborhood. Source: Authors.</p>
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<p>Implementation of the criteria of walkability “quality of the journey” theme in Quarters 1 and 2 of Al-Falah neighborhood. Source: Authors.</p>
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21 pages, 5977 KiB  
Article
Contrasting Non-Timber Forest Products’ Case Studies in Underdeveloped Areas in China
by Qin Qiao, Shuo Lei, Wenting Zhang, Guomei Shao, Yong Sun and Yongwei Han
Forests 2024, 15(9), 1629; https://doi.org/10.3390/f15091629 - 15 Sep 2024
Viewed by 206
Abstract
Enhancing the sustainability of the non-timber forest products industry has dual significance for both the management of local forest resources and socio-economic development. This paper adopts a systems theory perspective to construct an analytical model for the sustainable development of non-timber forest products, [...] Read more.
Enhancing the sustainability of the non-timber forest products industry has dual significance for both the management of local forest resources and socio-economic development. This paper adopts a systems theory perspective to construct an analytical model for the sustainable development of non-timber forest products, based on a “social-economic-natural” framework. By analyzing case studies of non-timber forest products industry sustainability from four underdeveloped counties in China, the paper derives the following main conclusions and insights: The sustainability of non-timber forest products development models is influenced by factors such as resource endowments and institutional environments and includes both single and composite models. Underdeveloped regions can achieve considerable sustainability in the development of non-timber forest products, but this requires a rational allocation of six key elements—policy, model, stakeholders, natural resources, funding, and technology—to stimulate industry growth. To promote the sustainable development of this industry, optimization should be pursued across five aspects: “policy leadership and top-level design to guide industry development”, “selection of appropriate development models based on local natural endowments and socio-economic foundations”, “large enterprise-driven mechanisms to form multi-stakeholder interest connections”, “focus on product technology research and development, and establishment of technical training mechanisms”, and “market-driven funding to develop product sales markets”. Full article
(This article belongs to the Section Forest Economics, Policy, and Social Science)
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<p>Different models for the development of the non-timber forest products industry: (<b>a</b>) understory cultivation (e.g., mushroom cultivation, cultivation of medicinal herbs); (<b>b</b>) understory farming (e.g., raising geese, sika deer); (<b>c</b>) forest ecotourism.</p>
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<p>Case analysis framework.</p>
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<p>Location of the study counties on the map of China.</p>
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<p>Analysis of core elements in the western case.</p>
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<p>Analysis of core elements in the southern case.</p>
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<p>Analysis of core elements in the eastern case.</p>
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<p>Analysis of core elements in Northern Case.</p>
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<p>Common factors among the four cases.</p>
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<p>Framework for optimizing sustainable development models of the non-timber forest products industry.</p>
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18 pages, 2857 KiB  
Article
AnyFace++: Deep Multi-Task, Multi-Domain Learning for Efficient Face AI
by Tomiris Rakhimzhanova, Askat Kuzdeuov and Huseyin Atakan Varol
Sensors 2024, 24(18), 5993; https://doi.org/10.3390/s24185993 - 15 Sep 2024
Viewed by 213
Abstract
Accurate face detection and subsequent localization of facial landmarks are mandatory steps in many computer vision applications, such as emotion recognition, age estimation, and gender identification. Thanks to advancements in deep learning, numerous facial applications have been developed for human faces. However, most [...] Read more.
Accurate face detection and subsequent localization of facial landmarks are mandatory steps in many computer vision applications, such as emotion recognition, age estimation, and gender identification. Thanks to advancements in deep learning, numerous facial applications have been developed for human faces. However, most have to employ multiple models to accomplish several tasks simultaneously. As a result, they require more memory usage and increased inference time. Also, less attention is paid to other domains, such as animals and cartoon characters. To address these challenges, we propose an input-agnostic face model, AnyFace++, to perform multiple face-related tasks concurrently. The tasks are face detection and prediction of facial landmarks for human, animal, and cartoon faces, including age estimation, gender classification, and emotion recognition for human faces. We trained the model using deep multi-task, multi-domain learning with a heterogeneous cost function. The experimental results demonstrate that AnyFace++ generates outcomes comparable to cutting-edge models designed for specific domains. Full article
(This article belongs to the Section Biomedical Sensors)
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<p>The AnyFace++ network architecture is built on the YOLOv8 backbone network, includes its two existing output layers (object classification and bounding box regression) and also introduces new output layers (facial landmark regression, age regression, gender classification, and emotion classification).</p>
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<p>Examples of unlabeled faces in the validation set of Wider Face, detected by AnyFace++. The red bounding boxes are ground truth. The green bounding boxes with confidence scores are predictions: (<b>a</b>) dark faces, (<b>b</b>) blurry faces, and (<b>c</b>) a toy face.</p>
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<p>Examples of predictions by the multi-domain, multi-task face AI model, AnyFace++.</p>
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<p>Examples of predictions by AnyFace++: (<b>a</b>) underwater animals, (<b>b</b>) dolls, and (<b>c</b>) facelike objects.</p>
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4 pages, 5386 KiB  
Proceeding Paper
Hybrid Transient-Machine Learning Methodology for Leak Detection in Water Transmission Mains
by Caterina Capponi, Andrea Menapace, Silvia Meniconi, Daniele Dalla Torre, Maurizio Tavelli, Maurizio Righetti and Bruno Brunone
Eng. Proc. 2024, 69(1), 142; https://doi.org/10.3390/engproc2024069142 - 15 Sep 2024
Viewed by 62
Abstract
This contribution proposes a hybrid approach integrating transient test-based techniques with machine learning for automatic leak detection in water transmission mains. Transient numerical simulations calibrated using experimental tests are used to develop a data-driven method based on neural networks to identify leak locations [...] Read more.
This contribution proposes a hybrid approach integrating transient test-based techniques with machine learning for automatic leak detection in water transmission mains. Transient numerical simulations calibrated using experimental tests are used to develop a data-driven method based on neural networks to identify leak locations and characteristics. The accuracy of leak localization is demonstrated using three different degrees of noise in terms of mean absolute error, ranging between 0.54 m and 2.1 m. This proposed hybrid approach shows prospects for in-field applications. Full article
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<p>(<b>a</b>) Schematic diagram of the experimental setup at the Water Engineering Laboratory of the University of Perugia; (<b>b</b>) three pressure signals recorded during the experimental test campaign.</p>
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<p>Pressure transient signals in PT simulated using the numerical model with different leak positions and sizes: (<b>a</b>) 10 samples of data from dataset<sub>(1)</sub> and (<b>b</b>) 10 samples from dataset<sub>(3)</sub>.</p>
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<p>FFNN results as a Q-Q plot of the predicted against real leak positions for the three datasets: dataset<sub>(1)</sub> in green, dataset<sub>(2)</sub> in orange, and dataset<sub>(3)</sub> in blue.</p>
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17 pages, 4188 KiB  
Article
Three in One with Dual-Functional Hydrogel of Lactoferrin/NZ2114/LMSH Promoting Staphylococcus aureus-Infected Wound Healing
by Kun Zhang, Xuanxuan Ma, Da Teng, Ruoyu Mao, Na Yang, Ya Hao and Jianhua Wang
Antibiotics 2024, 13(9), 889; https://doi.org/10.3390/antibiotics13090889 (registering DOI) - 15 Sep 2024
Viewed by 237
Abstract
Wound infections caused by Staphylococcus aureus often result in localized suppurative lesions that severely impede the healing process, so it is urgent to develop a dress with efficient antimicrobial and pro-healing functions. In this study, the bifunctional injectable hydrogel lactoferrin (Lf)/NZ2114/lithium magnesium silicate [...] Read more.
Wound infections caused by Staphylococcus aureus often result in localized suppurative lesions that severely impede the healing process, so it is urgent to develop a dress with efficient antimicrobial and pro-healing functions. In this study, the bifunctional injectable hydrogel lactoferrin (Lf)/NZ2114/lithium magnesium silicate hydrogel (LMSH) was first successfully prepared through the electrostatic interaction method. The physical, biological, and efficacy properties are systematically analyzed with good shear-thinning capacity and biocompatibility. More importantly, it inhibits infection and promotes wound healing in a mouse wound infection model after 14 d treatment, and the bactericidal rate and healing rate were over 99.92% and nearly 100%, respectively. Meanwhile, the massive reduction of inflammatory cells, restoration of tissue structure, and angiogenesis in mice showed the anti-inflammatory and pro-healing properties of the hydrogel. The healed wounds showed thickening with more hair follicles and glands, suggesting that the hydrogel Lf/NZ2114/LMSH (Three in One) could be a better dressing candidate for the treatment of S. aureus-induced wound infections. Full article
(This article belongs to the Special Issue Anti-microbial Coating Innovations to Prevent Infectious Diseases)
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<p>The photograph, antimicrobial activity and FT–IR spectrum of the injectable hydrogel Lf/NZ2114/LMSH. (<b>a</b>) The photograph of the synthetic injectable hydrogel; (<b>b</b>) Inhibition zone of NZ2114, Lf, 1% LMSH/Lf/NZ2114, 3% HACC/Lf/NZ2114, 3% SA, 1% LMSH; (<b>c</b>) The FT–IR spectra of 1% LMSH, 1% LMSH + Lf, 1% LMSH + NZ2114, 1% LMSH + Lf + NZ2114, 1.5% LMSH + Lf + NZ2114, 3% HACC, 3% HACC + Lf, 3% HACC + NZ2114, 3% HACC + Lf + NZ2114.</p>
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<p>The morphology of the synthetic injectable hydrogel. The SEM image of 0.5% LMSH + NZ2114, 1% LMSH + Lf + NZ2114, 1% LMSH + Lf + NZ2114, 3% HACC + Lf + NZ2114, 1% LMSH, 3% HACC, Lf + NZ2114.</p>
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<p>The viscosity, modulus, and bactericidal properties of different hydrogel samples. (<b>a</b>) The viscosity of 0.5% Lf/NZ2114/LMSH and 1% Lf/NZ2114/LMSH during sheer increase from 0.01 to 100 s<sup>−1</sup>; (<b>b</b>) The viscosity of 3% Lf/NZ2114/HACC during sheer increase from 0.01 to 100 s<sup>−1</sup>; (<b>c</b>) The storage modulus (G′) and loss modulus (G″) of 0.5% Lf/NZ2114/LMSH, 1% Lf/NZ2114/LMSH, and 3% Lf/NZ2114/HACC during strain increase from 0.1% to 1000% at the frequency of 1 Hz; (<b>d</b>,<b>e</b>) The bactericidal rate of 1% Lf/NZ2114/LMSH, 3% Lf/NZ2114/HACC, Lf + NZ2114, Lf, NZ2114, 1% LMSH, 3% HACC against <span class="html-italic">S. aureus</span> CVCC 546 (n = 3). These (−2, −3, −4, −5) are the number of dilutions. (* <span class="html-italic">p</span> &lt; 0.05, *** <span class="html-italic">p</span> &lt; 0.001).</p>
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<p>The biocompatibility of different hydrogel samples. (<b>a</b>,<b>b</b>) The images and hemolysis rate of Lf, Lf + NZ2114, 1% Lf/NZ2114/LMSH, 3% Lf/NZ2114/HACC, 1% LMSH, 3% HACC, 0.1% Trix-100; (<b>c</b>) Cytotoxicity of HACAT cells co-cultured with Lf, Lf + NZ2114, 1% Lf/NZ2114/LMSH, 3% Lf/NZ2114/HACC, 1% LMSH, 3% HACC. Samples at 1, 2, and 4 days, n = 3; (<b>d</b>) The images of calcein–AM/PI double staining of the HACAT cells that were incubated with 1% Lf/NZ2114/LMSH, 3% Lf/NZ2114/HACC, 1% LMSH, 3% HACC for 1, 2 and 4 days. (Scale bar = 100 μm). * <span class="html-italic">p</span> &lt; 0.05, *** <span class="html-italic">p</span> &lt; 0.001.</p>
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<p>The body weight, skin load, and wound diagram of mice (n = 3). (<b>a</b>) The weight of mice untreated and treated with Lf + NZ2114, 1% Lf/NZ2114/LMSH, 3% Lf/NZ2114/HACC, 1% LMSH, 3% HACC for 0–14 days; (<b>b</b>) The bacteria of skin untreated and treated with Lf + NZ2114, 1% Lf/NZ2114/LMSH, 3% Lf/NZ2114/HACC, 1% LMSH, 3% HACC samples for 4 d; (<b>c</b>) The macroscopic images of wounds untreated and treated with 1% Lf/NZ2114/LMSH, 3% Lf/NZ2114/HACC samples for 4, 8, 12 and 14 d; (<b>d</b>) The wound healing rate of mice untreated and treated with Lf + NZ2114, 1% Lf/NZ2114/LMSH, 3% Lf/NZ2114/HACC, 1% LMSH, 3% HACC samples for 4, 8, 12, and 14 d. * <span class="html-italic">p</span> &lt; 0.05, ** <span class="html-italic">p</span> &lt; 0.01, *** <span class="html-italic">p</span> &lt; 0.001.</p>
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<p>HE staining of the wounds without any treatment or treated with 1% Lf/NZ2114/LMSH and 3% Lf/NZ2114/HACC samples for 14 days.</p>
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<p>The cytokine secretion without any treatment or treated with 1% Lf/NZ2114/LMSH and 3% Lf/NZ2114/HACC samples for 14 days. (<b>a</b>–<b>c</b>) The expressions of IL-6, VEGF and EGFR were measured by ELISA kit. (<b>d</b>–<b>g</b>) The expressions of IL-6, VEGF, EGFR, and CD31 were measured at RNA level by qPCR.</p>
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<p>The immunohistochemistry of without any treatment or treated with 1% Lf/NZ2114/LMSH and 3% Lf/NZ2114/HACC samples for 14 days. CD31 staining of the wounds without any treatment or treated with different hydrogel samples for 14 days. IL-6 staining of the wounds for 14 days. (Red arrows are CD31 binding sites).</p>
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