bluuebunny/crossref_metadata_2025 huggingface dataset:
Enhancement of Vindoline and Catharanthine Accumulation, Antioxidant Enzymes Activities, and Gene Expression Levels in Catharanthus roseus Leaves by Chitooligosaccharides Elicitation
Authors: Tang Wenzhu , Liu Xiaoqi , He Yuning , Yang Fan
Published: March 2022

Catharanthus roseus (L.) G. Don is a plant belonging to the genus Catharanthus of the Apocynaceae family. It contains more than one hundred alkaloids, of which some exhibit significant pharmacological activities. Chitooligosaccharides are the only basic aminooligosaccharides with positively charged cations in nature, which can regulate plant growth and antioxidant properties. In this study, the leaves of Catharanthus roseus were sprayed with chitooligosaccharides of different molecular weights (1 kDa, 2 kDa, 3 kDa) and different concentrations (0.01 μg/mL, 0.1 μg/mL, 1 μg/mL and 10 μg/mL). The fresh weights of its root, stem and leaf were all improved after chitooligosaccharides treatments. More importantly, the chitooligosaccharides elicitor strongly stimulated the accumulation of vindoline and catharanthine in the leaves, especially with the treatment of 0.1 μg/mL 3 kDa chitooligosaccharides, the contents of them were increased by 60.68% and 141.54%, respectively. Furthermore, as the defensive responses, antioxidant enzymes activities (catalase, glutathione reductase, ascorbate peroxidase, peroxidase and superoxide dismutase) were enhanced under chitooligosaccharides treatments. To further elucidate the underlying mechanism, qRT-PCR was used to investigate the genes expression levels of secologanin synthase (SLS), strictosidine synthase (STR), strictosidine glucosidase (SGD), tabersonine 16-hydroxylase (T16H), desacetoxyvindoline-4-hydroxylase (D4H), deacetylvindoline-4-O-acetyltransferase (DAT), peroxidase 1 (PRX1) and octadecanoid-responsive Catharanthus AP2-domain protein 3 (ORCA3). All the genes were significantly up-regulated after chitooligosaccharides treatments, and the transcription abundance of ORCA3, SLS, STR, DAT and PRX1 reached a maximal level with 0.1 μg/mL 3 kDa chitooligosaccharides treatment. All these results suggest that spraying Catharanthus roseus leaves with chitooligosaccharides, especially 0.1 μg/mL of 3 kDa chitooligosaccharides, may effectively improve the pharmaceutical value of Catharanthus roseus.
Efficient Extraction of Total Polyphenols from Apple and Investigation of Its SPF Properties
Authors: Opriş Ocsana , Lung Ildiko , Soran Maria-Loredana , Stegarescu Adina , Cesco Tatiana , Ghendov-Mosanu Aliona , Podea Paula , Sturza Rodica
Published: March 2022

The purpose of this study was to evaluate the sun protection factor (SPF) of cosmetic emulsions with the addition of hydroalcoholic apple extract. First, the total polyphenolic content, the antioxidant activity and SPF properties of the extracts obtained by sonication and refluxing were evaluated. The two extraction methods were improved using the central composite design. For cosmetic emulsion that contained a different concentration of apple extract (10–40%), a SPF value between 0.51 and 0.90 was obtained. The most efficient apple extract was obtained by reflux using 50% ethanol and a 60 min extraction time. The concentrated extract was incorporated in a cosmetic emulsion whose SPF maximum was 0.90. Accordingly, due to photoprotective properties, the apple extract can be a candidate for use in cosmetic formulations.
Body Composition Assessment in Mexican Children and Adolescents. Part 1: Comparisons between Skinfold-Thickness, Dual X-ray Absorptiometry, Air-Displacement Plethysmography, Deuterium Oxide Dilution, and Magnetic Resonance Imaging with the 4-C Model
Authors: Lopez-Gonzalez Desiree , Wells Jonathan C. K. , Parra-Carriedo Alicia , Bilbao Gladys , Mendez Martín , Clark Patricia
Published: March 2022

The evaluation of body composition (BC) is relevant in the evaluation of children’s health-disease states. Different methods and devices are used to estimate BC. The availability of methods and the clinical condition of the patient usually defines the ideal approach to be used. In this cross-sectional study, we evaluate the accuracy of different methods to estimate BC in Mexican children and adolescents, using the 4-C model as the reference. In a sample of 288 Mexican children and adolescents, 4-C body composition assessment, skinfold-thickness (SF), dual-energy X-ray absorptiometry (DXA), air displacement plethysmography (ADP), and deuterium dilution (D2O) were performed, along with MRI in a subsample (52 participants). The analysis of validity was performed by correlation analysis, linear regression, and the Bland–Altman method. All methods analyzed showed strong correlations for FM with 4-C values and between each other; however, DXA and MRI overestimated FM, whereas skinfolds and ADP under-estimated FM. Conclusion: The clinical assessment of BC by means of SF, ADP, DXA, MRI and D2O correlated well with the 4-C model and between them, providing evidence of their clinical validity and utility. The results from different methods are not interchangeable. Preference between methods may depend on their availability and the specific clinical setting.
Pancytopenia Due to Vitamin B12 and Folic Acid Deficiency—A Case Report
Authors: Depuis Zoé , Gatineau-Sailliant Sophie , Ketelslegers Olivier , Minon Jean-Marc , Seghaye Marie-Christine , Vasbien Myriam , Dresse Marie-Françoise
Published: March 2022

We report a case of severe pancytopenia in a 15-year-old patient due to a severe deficiency in vitamin B12 and folic acid, probably of nutritional origin. The clinical and biological course was favorable after vitamin supplementation. With this case, we discuss the diagnostic approach of pancytopenia with megaloblastic anemia in children and adolescents, as well as the mechanisms involved in vitamin B12 and B9 deficiency. Hypovitaminosis B12 is known in its severe form but its diagnosis is often made difficult by insidious signs and symptoms. Traditional intramuscular replacement therapy has now proven to be effective orally. The clinical manifestations of folic acid deficiency are relatively similar to those of vitamin B12 deficiency, reflecting their intricate co-enzymatic functions. Its supplementation is administered orally.
Hybrids of Imatinib with Quinoline: Synthesis, Antimyeloproliferative Activity Evaluation, and Molecular Docking
Authors: Santos Carine , Pimentel Luiz , Canzian Henayle , Oliveira Andressa , Junior Floriano , Dantas Rafael , Hoelz Lucas , Marinho Debora , Cunha Anna , Bastos Monica , Boechat Nubia
Published: March 2022

Imatinib (IMT) is the first-in-class BCR-ABL commercial tyrosine kinase inhibitor (TKI). However, the resistance and toxicity associated with the use of IMT highlight the importance of the search for new TKIs. In this context, heterocyclic systems, such as quinoline, which is present as a pharmacophore in the structure of the TKI inhibitor bosutinib (BST), have been widely applied. Thus, this work aimed to obtain new hybrids of imatinib containing quinoline moieties and evaluate them against K562 cells. The compounds were synthesized with a high purity degree. Among the produced molecules, the inhibitor 4-methyl-N3-(4-(pyridin-3-yl)pyrimidin-2-yl)-N1-(quinolin-4-yl)benzene-1,3-diamine (2g) showed a suitable reduction in cell viability, with a CC50 value of 0.9 µM (IMT, CC50 = 0.08 µM). Molecular docking results suggest that the interaction between the most active inhibitor 2g and the BCR-ABL1 enzyme occurs at the bosutinib binding site through a competitive inhibition mechanism. Despite being less potent and selective than IMT, 2g is a suitable prototype for use in the search for new drugs against chronic myeloid leukemia (CML), especially in patients with acquired resistance to IMT.
Exploring the Potential Effects and Mechanisms of Asarum sieboldii Radix Essential Oil for Treatment of Asthma
Authors: Han Jae Min , Kim Mi Hye , Choi La Yoon , Kim Gyeongsang , Yang Woong Mo
Published: March 2022

Asthma, a common chronic pulmonary disorder characterized by airway remodeling, hyperresponsiveness and obstruction, can be aggravated by repeated exposure to particulate matter (PM). The potential effect and mechanisms of Asarum sieboldii Radix essential oil (AEO) against asthma were explored based on network pharmacology. AEO was pre-treated using a nebulizer for 3 weeks and the mice were sensitized to ovalbumin (OVA) and PM10 with the co-treatment of AEO for 4 weeks. In addition, A549 lung epithelial cells were sensitized with PM10 to investigate the underlying mechanisms of AEO regarding the lung-fibrosis-related mediators. The target genes of methyl eugenol, a main compound of AEO, were highly matched by 48% with the gene set of asthma. AEO markedly inhibited the increase in epithelial thickness through the accumulation of goblet cells in the airways. Collagen deposition in the lung tissues of OVA+PM10-challenged asthmatic mice was significantly decreased by AEO. AEO also inhibited the influx of inflammatory cells in the bronchoalveolar lavage fluid, as well as the increases in serum IgE and IgG2a and cytokines in the lung tissues. Furthermore, AEO regulated the expressions of fibrotic mediators, especially POSTN and TGF-β. In conclusion, we expect that AEO can be one of the effective alternative therapeutics to relieve asthma.
Furanic Humins from Biorefinery as Biobased Binder for Bitumen
Authors: Sangregorio Anna , Guigo Nathanael , Vincent Luc , de Jong Ed , Sbirrazzuoli Nicolas
Published: March 2022

To decrease the environmental impact of bitumen, more sustainable binders should be proposed. This study emphasizes how industrial humins co-produced during the biorefining of carbohydrates can be employed as a macromolecular binder for bitumen. Humins are heterogeneous polyfuranic compounds, and they were mixed at 50 wt% with bitumen. When the non-water-soluble fractions of humins were employed (Hns), no variation of the chemical structure was observed in FTIR spectra after the mixing. The DSC investigations showed that the crystallization of aromatic fractions in bitumen shifted to higher temperature for humins’ modified bitumen. The thermogravimetric data highlighted that the presence of humins or Hns in bitumen can lead to mass loss below 200 °C. The rheological investigations highlighted some key advantages of using humins or Hns with bitumen. At high temperatures, the storage modulus of the modified bitumen is increased and shows lower susceptibility to variations in frequency. At low temperatures, the phase angle of Hns-modified bitumen is lower than that of bitumen, suggesting less temperature susceptibility as a consequence of a cross-linked network formation.
Pushed Forward by Lifted Hearts: On Stanislaus Lo Kuang’s Sino-Christian Philosophy of History
Authors: Rogacz Dawid
Published: March 2022

This article presents an analysis of the Sino-Christian philosophy of history created by Archbishop Stanislaus Lo Kuang (1911–2004), whose comprehensive view of historiography and the historical process situates him amongst very few contemporary thinkers interested in developing a distinctively Christian yet strictly philosophical outlook of human history. It is shown that for Lo, an inquiry into the structure of historical facts leads to uncovering their meaning, which is identical with the meaning of human life, namely the search for happiness. Humans, driven by their nature and led by heroes, move freely towards what they consider greater happiness, realizing that this requires ever greater freedom and equality. God is introduced in this approach only as a guarantee of the fulfillment of the deepest desires and the One who inscribed them into human hearts. Importantly, in his discussion of God’s relation to history, Lo Kuang refers to the Confucian conceptions of human nature, Heaven, and destiny, offering a cross-cultural synthesis at the intersection of the theology and philosophy of history. It is argued that despite its inconsistencies, Lo Kuang’s contribution is original and could still be relevant for global society today.
Summer Nighttime Anomalies of Ionospheric Electron Content at Midlatitudes: Comparing Years of Low and High Solar Activities Using Observations and Tidal/Planetary Wave Features
Authors: Yin Yu , González-Casado Guillermo , Rovira-Garcia Adrià , Juan José Miguel , Sanz Jaume , Shao Yixie
Published: March 2022

In this study, midlatitude summer nighttime anomalies (MSNAs) are analyzed via observations and tidal/planetary wave features using measurements from the Formosat-3/Constellation Observing System for Meteorology, Ionosphere, and Climate (F3C) for 2007, a year with low solar activity, and 2014, a year with high solar activity. The total ionospheric electron content, ECion, an integrated quantity derived from F3C measurements, was used to compare the observational data. The ECion values were derived from accurate radio-occultation-retrieved electron density profiles without assuming spherical symmetry and from a model that separated the ground total electron content into the plasmaspheric and the ionospheric electron content contributions. An analysis of the ECion data set confirmed that MSNAs were present in three different regions of the world for the months surrounding the local summer solstice during both 2007 and 2014. In the southern hemisphere, the so-called Weddell Sea Anomaly showed a maximum increase in ECion, measured as the difference between nighttime and midday values, that was more than three times that in the northern MSNAs. For each individual MSNA, the corresponding maximum increases in electron content were similar between the two years analyzed, so they were not significantly affected by solar activity. Then, linear least-square fit to the frequency–wave number basis functions was used to derive the tidal and planetary wave components contributing to MSNAs. The main component that appears to produce the Weddell Sea Anomaly is D0, followed by SPW1, DW2, and DE1, in this order, which make secondary but still relevant contributions. The presence of MSNAs in the northern hemisphere was clearly supported by the migrating tide SW2 in combination with DE1. SW2 also supported an early morning MSNA being observed in the northern hemisphere. The main tidal and planetary wave signatures producing the MSNAs did not significantly differ between 2007 and 2014.
Oriented Object Detection in Remote Sensing Images with Anchor-Free Oriented Region Proposal Network
Authors: Li Jianxiang , Tian Yan , Xu Yiping , Zhang Zili
Published: March 2022

Oriented object detection is a fundamental and challenging task in remote sensing image analysis that has recently drawn much attention. Currently, mainstream oriented object detectors are based on densely placed predefined anchors. However, the high number of anchors aggravates the positive and negative sample imbalance problem, which may lead to duplicate detections or missed detections. To address the problem, this paper proposes a novel anchor-free two-stage oriented object detector. We propose the Anchor-Free Oriented Region Proposal Network (AFO-RPN) to generate high-quality oriented proposals without enormous predefined anchors. To deal with rotation problems, we also propose a new representation of an oriented box based on a polar coordinate system. To solve the severe appearance ambiguity problems faced by anchor-free methods, we use a Criss-Cross Attention Feature Pyramid Network (CCA-FPN) to exploit the contextual information of each pixel and its neighbors in order to enhance the feature representation. Extensive experiments on three public remote sensing benchmarks—DOTA, DIOR-R, and HRSC2016—demonstrate that our method can achieve very promising detection performance, with a mean average precision (mAP) of 80.68%, 67.15%, and 90.45%, respectively, on the benchmarks.
Shape-Constrained Method of Remote Sensing Monitoring of Marine Raft Aquaculture Areas on Multitemporal Synthetic Sentinel-1 Imagery
Authors: Zhang Yi , Wang Chengyi , Chen Jingbo , Wang Futao
Published: March 2022

Large-scale and periodic remote sensing monitoring of marine raft aquaculture areas is significant for scientific planning of their layout and for promoting sustainable development of marine ecology. Synthetic aperture radar (SAR) is an important tool for stable monitoring of marine raft aquaculture areas since it is all-weather, all-day, and cloud-penetrating. However, the scattering signal of marine raft aquaculture areas is affected by speckle noise and sea state, so their features in SAR images are complex. Thus, it is challenging to extract marine raft aquaculture areas from SAR images. In this paper, we propose a method to extract marine raft aquaculture areas from Sentinel-1 images based on the analysis of the features for marine raft aquaculture areas. First, the data are preprocessed using multitemporal phase synthesis to weaken the noise interference, enhance the signal of marine raft aquaculture areas, and improve the significance of the characteristics of raft aquaculture areas. Second, the geometric features of the marine raft aquaculture area are combined to design the model structure and introduce the shape constraint module, which adds a priori knowledge to guide the model convergence direction during the training process. Experiments verify that the method outperforms the popular semantic segmentation model with an F1 of 84.52%.
Measurement of Optical Rubidium Clock Frequency Spanning 65 Days
Authors: Lemke Nathan D. , Martin Kyle W. , Beard River , Stuhl Benjamin K. , Metcalf Andrew J. , Elgin John D.
Published: March 2022

Optical clocks are emerging as next-generation timekeeping devices with technological and scientific use cases. Simplified atomic sources such as vapor cells may offer a straightforward path to field use, but suffer from long-term frequency drifts and environmental sensitivities. Here, we measure a laboratory optical clock based on warm rubidium atoms and find low levels of drift on the month-long timescale. We observe and quantify helium contamination inside the glass vapor cell by gradually removing the helium via a vacuum apparatus. We quantify a drift rate of 4×10−15/day, a 10 day Allan deviation less than 5×10−15, and an absolute frequency of the Rb-87 two-photon clock transition of 385,284,566,371,190(1970) Hz. These results support the premise that optical vapor cell clocks will be able to meet future technology needs in navigation and communications as sensors of time and frequency.
Railway Track Inspection Using Deep Learning Based on Audio to Spectrogram Conversion: An on-the-Fly Approach
Authors: Hashmi Muhammad Shadab Alam , Ibrahim Muhammad , Bajwa Imran Sarwar , Siddiqui Hafeez-Ur-Rehman , Rustam Furqan , Lee Ernesto , Ashraf Imran
Published: March 2022

The periodic inspection of railroad tracks is very important to find structural and geometrical problems that lead to railway accidents. Currently, in Pakistan, rail tracks are inspected by an acoustic-based manual system that requires a railway engineer as a domain expert to differentiate between different rail tracks’ faults, which is cumbersome, laborious, and error-prone. This study proposes the use of traditional acoustic-based systems with deep learning models to increase performance and reduce train accidents. Two convolutional neural networks (CNN) models, convolutional 1D and convolutional 2D, and one recurrent neural network (RNN) model, a long short-term memory (LSTM) model, are used in this regard. Initially, three types of faults are considered, including superelevation, wheel burnt, and normal tracks. Contrary to traditional acoustic-based systems where the spectrogram dataset is generated before the model training, the proposed approach uses on-the-fly feature extraction by generating spectrograms as a deep learning model’s layer. Different lengths of audio samples are used to analyze their performance with each model. Each audio sample of 17 s is split into 3 variations of 1.7, 3.4, and 8.5 s, and all 3 deep learning models are trained and tested against each split time. Various combinations of audio data augmentation are analyzed extensively to investigate models’ performance. The results suggest that the LSTM with 8.5 split time gives the best results with the accuracy of 99.7%, the precision of 99.5%, recall of 99.5%, and F1 score of 99.5%.
Contactless Credit Cards Payment Fraud Protection by Ambient Authentication
Authors: Yang Ming-Hour , Luo Jia-Ning , Vijayalakshmi Murugesan , Shalinie Selvaraj Mercy
Published: March 2022

In recent years, improvements to the computational ability of mobile phones and support for near-field-communication have enabled transactions to be performed by using mobile phones to emulate a credit card or by using quick response codes. Thus, users need not carry credit cards but can simply use their mobile phones. However, the Europay MasterCard Visa (EMV) protocol is associated with a number of security concerns. In contactless transactions, attackers can make purchases by launching a relay attack from a distance. To protect message transmission and prevent relay attacks, we propose a transaction protocol that is compatible with EMV protocols and that can perform mutual authentication and ambient authentication on near-field-communication-enabled mobile phones. Through mutual authentication, our protocol ensures the legitimacy of transactions and establishes keys for a transaction to protect the subsequent messages, thereby avoiding security problems in EMV protocols, such as man-in-the-middle attacks, skimming, and clone attacks on credit cards. By using ambient factors, our protocol verifies whether both transacting parties are located in the same environment, and it prevents relay attacks in the transaction process.
Higher Hamstrings Strength and Stability Are Related to Lower Kinematics Alteration during Running after Central and Peripheral Fatigue
Authors: Encarnación-Martínez Alberto , García-Gallart Antonio , Sanchis-Sanchis Roberto , Jimenez-Perez Irene , Priego-Quesada Jose I. , Pérez-Soriano Pedro
Published: March 2022

Fatigue can be classified as peripheral or central depending on the extent of its effects. Muscle strength reduction, associated with the appearance of fatigue during running, produces kinetics and kinematics modifications which could lead to an increased risk of injury. This study aimed to analyze the effect of peripheral and central fatigue protocols in running kinematics and to investigate the relationship between isokinetic strength and dynamic stability in fatigue related changes. Eighteen male recreational runners participated in the study. The dynamic postural stability index (DPSI) and quadriceps and hamstring isokinetic strength were assessed before the fatigue test. Then, angular kinematics during treadmill running were evaluated in pre- and post-fatigue states (central and peripheral). The results showed that runners with higher hamstring isokinetic strength and better DPSI had lower modifications after central fatigue of stance time, knee flexion, vertical and leg stiffness, and ankle dorsiflexion during the absorption and propulsion phases (r > 0.400, p < 0.05). Moreover, small changes in ankle dorsiflexion at initial contact after peripheral fatigue are related to a better DPSI and higher hamstring isokinetic strength (r > 0.400, p < 0.05). In summary, high values of hamstring isokinetic concentric strength and dynamic stability are related to lower increases of range of movements during running after central and peripheral fatigue. So, fatigue may affect to a lesser extent the running technique of those runners with higher hamstring strength and stability values.
Towards Systematic Sustainable Business Model Innovation: What Can We Learn from Business Model Innovation
Authors: Minatogawa Vinicius , Franco Matheus , Rampasso Izabela Simon , Holgado Maria , Garrido Diego , Pinto Hernan , Quadros Ruy
Published: March 2022

This research aims to understand how sustainable business model innovation (SBMI) can learn from business model innovation. For this, first, we conducted a bibliometric analysis to evaluate the relationships between business model innovation and SBMI literature. After this, we performed a systematic literature review to create a comprehensive framework for managing SBMI. The bibliometric analysis showed that the SBMI stream grew quickly and significantly in recent years, evolving into a separated new research stream, which does not leverage recent business model innovation advancements. Through the performed analyses, we were able to discuss critical gaps in the SBMI literature and shed light on possible pathways to solve these gaps through lessons learned from business model innovation. We depicted five critical gaps for managing SBMI; (1) the need to understand the sustainable business model as a wicked problem, in which SBMI leads to “better than before” solutions calling for systematic SBMI, (2) the poor definition of distinctive dimensions of dynamic capabilities for SBMI, (3) the lack of studies exploring the role of open innovation for improving the SBMI process, (4) the lack of tools supporting SBMI implementation and (5) the need to explore game-changing, competitive advantages of SBMI. The findings of this study contribute to guiding future research on SBMI, which can be a basis for further efforts towards sustainable development.
Developing a Deep Neural Network for Driver Fatigue Detection Using EEG Signals Based on Compressed Sensing
Authors: Sheykhivand Sobhan , Rezaii Tohid Yousefi , Meshgini Saeed , Makoui Somaye , Farzamnia Ali
Published: March 2022

In recent years, driver fatigue has become one of the main causes of road accidents. As a result, fatigue detection systems have been developed to warn drivers, and, among the available methods, EEG signal analysis is recognized as the most reliable method for detecting driver fatigue. This study presents an automated system for a two-stage classification of driver fatigue, using a combination of compressed sensing (CS) theory and deep neural networks (DNNs), that is based on EEG signals. First, CS theory is used to compress the recorded EEG data in order to reduce the computational load. Then, the compressed EEG data is fed into the proposed deep convolutional neural network for automatic feature extraction/selection and classification purposes. The proposed network architecture includes seven convolutional layers together with three long short-term memory (LSTM) layers. For compression rates of 40, 50, 60, 70, 80, and 90, the simulation results for a single-channel recording show accuracies of 95, 94.8, 94.6, 94.4, 94.4, and 92%, respectively. Furthermore, by comparing the results to previous methods, the accuracy of the proposed method for the two-stage classification of driver fatigue has been improved and can be used to effectively detect driver fatigue.
Plant Diversity Increased Arthropod Diversity and Crop Yield in Traditional Agroforestry Systems but Has No Effect on Herbivory
Authors: N’Woueni Daniel K. , Gaoue Orou G.
Published: March 2022

Improving agricultural production in response to the increasing food demand remains a major challenge in agroecology. The world has made significant efforts to meet this issue by developing several cultivation techniques, such as the use of chemical fertilizers and arable land conversion into agricultural land. However, most of these techniques have caused a significant loss of biodiversity and ecosystems services. Recent data suggest that biological conservation within and around agroforestry systems are potential solutions that can both reduce biodiversity loss and guarantee crop production. This logic is based on the hypothesis that increasing plant diversity in and around agricultural systems can limit the pest attack rate and increase crop yield. We tested this hypothesis using structural equation modeling on empirical data collected in agroforestry systems around the Pendjari biosphere reserve in West Africa. We measured crop diversity, crop yield, arthropod pest diversity, abundance, the rate of crop herbivory, and the diversity of plants in surrounding natural vegetation in 32 permanent plots. We estimated arthropod diversity and abundance using pitfall traps. We found a direct positive effect for plant diversity and a direct negative effect of arthropod herbivory on crop yield. The diversity of plants in surrounding natural vegetation had a direct positive effect on arthropod pest diversity but a marginal negative direct effect on the rate of crop herbivory. We found no significant direct or indirect effect for crop diversity. Our findings underline the important role of biodiversity conservation in agricultural production improvement. We suggest that the conservation of plant diversity around agroforestry systems may be an effective option to control herbivory damage. Its combination with other pest control techniques may further limit crop depredation and ensure the long-term conservation of wildlife.
Public Transport COVID-19-Safe: New Barriers and Policies to Implement Effective Countermeasures under User’s Safety Perspective
Authors: Lucchesi Shanna Trichês , Tavares Virginia Bergamaschi , Rocha Miriam Karla , Larranaga Ana Margarita
Published: March 2022

The COVID-19 emergency forced cities worldwide to adopt measures to restrict travel and implement new urban public transport solutions. The discontinuity and reduction of services made users recognize public transport systems as contamination vectors, and the decrease in the number of passengers can already be seen in several places. Thus, this study assessed the impact of the COVID-19 pandemic on urban public transport. We used hybrid choice models (HCMs) to identify the new barriers and potential solutions to increase users’ perception of safety, considering preexistent perceptions of public transportation quality. We used data from an online survey with users of public transportation in a metropolitan area in southern Brazil. We identified that the main barriers to using public transport during virus transmission are related to the system characteristics that force constant interaction with other passengers. Crowded vehicles and crowded stops/stations were considered the most detrimental factor in feeling safe while riding in the COVID-19 outbreak. Countermeasures that reduce the contact with other passengers—directly (limit the number of passengers in vehicles) or indirectly (operate with large vehicles)—and increase offers are possible solutions to make users feel safe while riding. The results of this research might help reduce passenger evasion and migration to more unsustainable transport modes.
Analysis of the Complex Causes of Death Accidents Due to Mobile Cranes Using a Modified MEPS Method: Focusing on South Korea
Authors: Kim Sanghyun , Kang Chankyu
Published: March 2022

The convenience and efficiency of mobile cranes are expanding their applicability in industrial sites, but fatal accidents continue to occur as their use increases. There were 56 cases in South Korea from 2015 to 2019, killing 59 workers. To accurately investigate the cause of a fatal accident, accident investigation reports were used. Since they are used not only as the cause of the accident but also as a result of judicial treatment, only direct causes are mentioned. Thus, indirect causes in this study were separately analyzed to induce a complex cause analysis. The man-made, management, economic, physical, political, and social (MEPS) analysis method, developed by the National Institute of Disaster in South Korea, is a type of root cause analysis (RCA), used to derive the fundamental causes of various types of disasters, mainly social ones. The complex causes of fatal accidents were analyzed by applying a modified MEPS method to mobile cranes. The MEPS method investigated three categories, namely man-made, management, and physical factors, among six categories and a newly established level four, to find the root cause of fatal accidents. The analysis results showed that violations of procedures and regulations were the most frequent causes in the man-made factors. A lack of general and special safety education was the most common cause in the management factor, and the overturning, falling, and jamming of the mobile crane were the most frequent causes in the physical factor.
Evaluation of the Circular Economy in a Pitahaya Agri-Food Chain
Authors: Diéguez-Santana Karel , Sarduy-Pereira Liliana B. , Sablón-Cossío Neyfe , Bautista-Santos Horacio , Sánchez-Galván Fabiola , Ruíz Cedeño Sebastiana del Monserrate
Published: March 2022

Over the last decade, the circular economy (CE) has attracted attention due to the current unsustainable model of production and consumption, which involves an increased resource use and depletion. Agri-food is one of the key sectors where action must be taken to ensure the transition to a more sustainable development model in line with circular economy principles. This study aims to evaluate the potential of implementing the circular economy in the pitahaya agri-food chain in Ecuador. The research was conducted from 2019 to 2021, during which a checklist was applied that included 91 items grouped into nine dimensions: source or supply of materials, design, manufacturing, economic circle, distribution and sales, consumption/use, 4R, remanufacturing, and sustainability. The level of the circular economy evaluated in the study was low (2.14 points out of 5). Therefore, improvements are required in the agri-food management of fruit cultivation and processing. Critical points were identified and strategies were proposed to increase competitiveness, improve environmental performance, and promote the implementation of the circular economy in this production chain. A final recommendation is to explore research on the concept of CE in the sector, mainly focused on the valorization of biomass as a contribution to the bioeconomy in order to contribute to the country’s growth within the context of sustainability.
Heavy Metal(loid)s Pollution of Agricultural Soils and Health Risk Assessment of Consuming Soybean and Wheat in a Typical Non-Ferrous Metal Mine Area in Northeast China
Authors: Li Dexian , Liu Guannan , Li Xiaosai , Li Ruiping , Wang Juan , Zhao Yuanyi
Published: March 2022

During mining, some of the essential metal(loid)s for plants or humans are discharged into the environment with non-essential metal(loid)s. Thus, comprehensive investigations of their distribution and the health risk of consuming food crops near mines are significant. A total of 26 soils and 25 food crops (soybean grains and wheat grains) were sampled to investigate arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb), zinc (Zn), selenium (Se), molybdenum (Mo), and manganese (Mn) in soils and crops in a typical non-ferrous metal mine area in Northeast China. The distribution patterns of soil heavy metal(loid)s and principal component analysis (PCA) results indicated that Cd, Cu, Zn, Mo, and Mn in soils were significantly affected by mining activities and were mainly or partly derived from the mines. Moreover, these soil heavy metal(loid)s (except Se) in the Tongshan copper mine area were attenuated with distance in the downstream direction. The BCF (bioconcentration factor) values of non-essential elements (Se, Hg, Cr, As, Cd, Pb) were relatively lower and positively related to soil nutrients. On the contrary, higher BCF values of essential elements (Cu, Zn, and Mo) and a weak relationship between the BCF of essential elements and soil nutrients were found. The mean Igeo values of soil heavy metal(loid)s indicated that As and Cu were at an unpolluted-to-moderately-polluted level (Igeo > 1), while other heavy metal(loid)s all presented an unpolluted level (Igeo < 1). Nevertheless, some soil samples were obviously polluted (Igeo > 1), such as KQ, D1, D3, D5, D6, and T1. The HQ (hazard quotient) and HI (hazard index) values of As and Mn both exceeded 1, indicating the higher potential health risks of consuming soybean grains and wheat grains for all people groups.
Knowledge Networks in Organic Fruit Production across Europe: A Survey Study
Authors: Malusà Eligio , Furmanczyk Ewa M. , Tartanus Małgorzata , Brouwer Gerjan , Parveaud Claude-Eric , Warlop François , Kelderer Markus , Kienzle Jutta , Alcazar Marin Evelyne , Dekker Teun , Vávra Radek , Verrastro Vincenzo , Lindhard Pedersen Hanne , Boutry Clémence , Friedli Michael , Schlüter Marco
Published: March 2022

Limited data regarding the resources and methods used by organic fruit growers to learn about production practices are available, even though this information is crucial to improving the efficacy of knowledge transfer. Therefore, a survey to gain information from knowledge networks dealing with organic fruit production about their structural organisation, tasks and methods of communication was carried out in twenty-one countries from Europe and the Mediterranean basin. A total of 56 networks representing about 42,500 professionals were identified as a result of the survey. The vast majority of them were only active at the regional or national level and were composed of farmers, advisors and researchers. About 3/4 of the networks were developing improved strategies for agronomic practices and about half of them were also involved in different knowledge-transfer activities between their members. Personal contact was the most used method to exchange and disseminate information within the networks as well as to elaborate improved strategies. The findings were analysed in view of the methods and practices commonly used to share both explicit (scientific) and implicit (practical) knowledge among practitioners. It was concluded that knowledge networks play an important role in the development of more resilient organic cropping systems, frequently making organic fruit growers the drivers of innovation. Networking for knowledge exchange was considered a process that encourages the active involvement of farmers in experimentation and innovation applying a method of knowledge sharing that is rooted in the very foundation of organic philosophy. Some recommendations and future research were suggested to further foster the development and functioning of networks for knowledge exchange.
Understanding Project Performance with Stochastic Interruption
Authors: Okubo Kazuaki , Okumura Makoto
Published: March 2022

It is becoming increasingly important to implement projects with care on environmental conditions. Some projects can be carried out only during the allowable season and interrupted during other seasons. Such a project interruption is expected to affect the quality of the project’s outcome through the decision-making of the stakeholders. This paper investigates the impact of interruption on the decision-making of the project owner and the contractor. We consider a project with some work after the interruption period (two-year project), the owner can select another option (one-year project) where all work is completed before the interruption period. If the fixed cost is higher relative to the benefit, our results show that the contractor prefers the one-year project, even when the owner selects the two-year project. We also represent the two threshold values of the interruption length that determine the owner’s selection and relative quality of outcomes, respectively. It was found that a range of interruption length where the selected project does not provide the higher quality outcome.
Coupling Relationship of Urban Development and the Eco-Environment in Guanzhong Region, China
Authors: Wang Jian , Zhao Mudan , Zhong Wei , Li Jianbo , Zheng Chunyan
Published: March 2022

Since the 21st century, China’s rapid urban development has had profound impacts on the regional eco-environment and posed severe threats to regional sustainable development. In order to scientifically evaluate the coupling relationship between urban development and the eco-environment in the Guanzhong region, in this paper, by combining nighttime lighting data and MODIS data in 2001, 2010 and 2018, we applied an overall coupling model and a coordination model to discuss the spatial–temporal coupling and coordination relationship between urban development and the eco-environment. The results showed the following: (1) From 2001 to 2018, the urbanization development in the Guanzhong region significantly improved and the links between cities were continuously strengthened, but the degree of contact still needed to be improved. (2) The eco-environment quality in the Guanzhong region slightly increased, but the overall level was low. The structure of the eco-environment quality grade changed greatly, and “Good” grades changed to “Very Good”. (3) During 2001–2018, the overall coupling situation between urban development and the eco-environment strengthened and the degree of coordination increased. The coupling coordinator subtype gradually transformed from system balanced development into system balanced development, the ecology lag type, and the urban development lag type coexisting phenomenon. The results of the study suggest that future urban development planning and ecological protection policies need to take the coordinated coupling between urban development and the eco-environment into account.
Critical Junctures in Sustainable Social Housing Policy Development in Saudi Arabia: A Review
Authors: Al Mulhim Khalid Abdullah Mulhim , Swapan Mohammad Shahidul Hasan , Khan Shahed
Published: March 2022

Historicising social housing delivery approach is extensively carried out for Western countries, but studies of social housing policy journey are less focused on developing nations and examining the policy development within resource-abundant Middle Eastern countries is even rarer. Applying a critical juncture approach through the historical institutionalism lens, this paper seeks to understand the evolution of social housing policies within the Saudi Arabian context. An in-depth policy review suggests that the institutional response in this sector has transitioned from a public-welfare perspective to a more neoliberal vision in recent times. The study also indicates a time-lag in policy development regarding social housing within the urban development process in Saudi Arabia compared to global movement. During the past few years, the government has begun to focus on social housing under the developmental housing program with a commitment to link these strategies to the Saudi Vision 2030. While this is a significant policy-shift in the service delivery approach, such vision could be workable as long as sufficient room is built in for other non-government actors to work within their specific protocols and frameworks as they collaborate to provide affordable and appropriate housing for the neediest groups of the society.
How Should the Structure of Smart Cities Change to Predict and Overcome a Pandemic?
Authors: Kim Jung-Hoon , Kim Joo-Young
Published: March 2022

A proposed countermeasure to COVID-19 is a robust healthcare system that can respond and identify transmission paths using information technology. This involves the use of smart city services for tracking an infected person. However, during the COVID-19 pandemic, the healthcare system could only provide data on the number of infected people. Additionally, smart city services could respond neither timely nor sequentially. This study proposed a method for timely and sequential responses, through a flexible combination of the healthcare system and smart city services by envisioning a scenario that sequentially grafts the current status of COVID-19 in Korea. The results are the following. First, the COVID-19 outbreak was summarized in the context of the healthcare system and current smart city services. A method by which the latter could respond to the various needs of the former was suggested. Second, recommendations on combining or dismissing certain smart city services, as per the needs of coping with COVID-19, were summarized. Third, smart city services must be utilized only for addressing pandemics, as data from the healthcare system consists of personal information. Therefore, smart city services for responding to COVID-19 must be flexible.
EntreComp Questionnaire: A Self-Assessment Tool for Entrepreneurship Competencies
Authors: López-Núñez Mª Inmaculada , Rubio-Valdehita Susana , Armuña Cristina , Pérez-Urria Elena
Published: March 2022

The European Entrepreneurship Competence Framework (EntreComp) offers a comprehensive description of the knowledge, skills, and attitudes that people need to develop for an entrepreneurial mindset. The use of the framework as a self-assessment tool has garnered attention, but there is scarce presence of instruments that address the whole set of competencies proposed by Entrecomp. In view of the lack of specific tools, the objective of this research was to assess the evidence of validity and reliability of a new questionnaire. The sample was composed of 742 college students from several Spanish universities between 17- and 64-years-old, with 34.6% being men and 65.4% being women. To evaluate the validity based on relationships with other measures, the Entrepreneurial Intention and Entrepreneurial Self-Capital scales were also administered. Confirmatory factor analysis showed an internal structure made up of four dimensions: Ideas and Opportunities, Personal Resources, Specific Knowledge, and Into Action. The results showed satisfactory evidence of validity based on relationships with Entrepreneurial Intention and Entrepreneurial Self-Capital and good reliability. The questionnaire has good psychometric properties and can be an easy and useful tool for the self-assessment of entrepreneurial competencies within the EntreComp framework.
Public Sector Downsizing and Public Sector Performance: Findings from a Content Analysis
Authors: Kazho Shahram Ali , Atan Tarik
Published: March 2022

The current literature suggests that downsizing is a popular strategy among public sector managers to improve organizational efficiency, effectiveness, and performance. To extend this line of research, this study aims to empirically examine the effects of public sector downsizing on organizational performance in the context of the Kurdistan Region of Iraq. To determine the effects of the subdimensions of public sector downsizing on the subdimensions of public sector performance, a conceptual model is developed and examined based on qualitative data collected from a sample of 20 public sector managers in various organizations in the Kurdistan Region of Iraq. Content analysis of the interviews reveals that, as a subdimension of public sector downsizing, privatization is suggested to link to the subdimensions of public sector performance. Implications of the findings for theory and practice are discussed, and avenues for future research are recommended.
Innovations in Energy Engineering and Cleaner Production: A Sustainable Chemistry Perspective
Authors: Deganello Francesca , Bos Jan-Willem G.
Published: March 2022

This Special Issue is focused on the chemical aspects of sustainable energy engineering and the clean production of materials [...]
The High-Order Harmonic Generation from Atom Driven by Co-Rotating Laser Pulses Composed of Fundamental Frequency and High Frequency
Authors: Chen Yanzuo , Shen Xuxu , Lan Wendi , Li Suyu , Guo Fuming , Yang Yujun
Published: March 2022

By numerically solving the time-dependent Schrödinger equation (TDSE), the harmonic generation process of atoms irradiated by corotating laser pulses composed of a fundamental-frequency and high-frequency field is systematically studied. Compared with the harmonic generated from atoms irradiated by counter-rotating two-color circularly polarized laser pulses, the harmonic efficiency of atoms irradiated by co-rotating two-color circularly polarized (CRTCCP) laser pulses with the same laser parameters is higher. The harmonics are generated by the multiphoton radiation transition after the bound electrons undergo a multiphoton absorption transition to a higher energy level. In addition, the variation of the harmonic efficiency with the field strength of different frequency components in the driving laser pulse is also studied. The circularly polarized harmonics with higher intensity can be obtained by optimizing the field strength of the driving laser field.