bluuebunny/crossref_metadata_2025 huggingface dataset:
Carbon Black/Polyvinylidene Fluoride Nanocomposite Membranes for Direct Solar Distillation
Authors: Pagliero Marcello , Alloisio Marina , Costa Camilla , Firpo Raffaella , Mideksa Ermias Ararsa , Comite Antonio
Published: January 2022

Water reclamation is becoming a growing need, in particular in developing countries where harvesting the required energy can be a challenging problem. In this context, exploiting solar energy in a specifically tailored membrane distillation (MD) process can be a viable solution. Traditional MD guarantees a complete retention of non-volatile compounds and does not require high feed water temperatures. In this work, a suitable amount of carbon black (CB) was incorporated into the whole matrix of a polymeric porous membrane in order to absorb light and directly heat the feed. The mixed matrix membranes were prepared forming a uniform CB dispersion in the PVDF dope solution and then using a non-solvent induced phase separation process, which is a well-established technique for membrane manufacturing. CB addition was found to be beneficial on both the membrane structure, as it increased the pore size and porosity, and on the photothermal properties of the matrix. In fact, temperatures as high as 60 °C were reached on the irradiated membrane surface. These improvements led to satisfactory distillate flux (up to 2.3 L/m2h) during the direct solar membrane distillation tests performed with artificial light sources and make this membrane type a promising candidate for practical applications in the field of water purification.
A Smart Fault-Tackling Strategy Based on PFTE for AC Three-Phase-to-Ground Faults in the Multi-Terminal HVDC Wind Power Integration System: Further Foundings
Authors: Du Chuan , Zhang Qingzhi , Cao Shuai
Published: January 2022

This paper describes a smart fault tackling strategy based on power flow transfer entropy (PFTE) for AC three-phase-to-ground (TPG) faults in the multi-terminal HVDC (MTDC) wind power integration system. The fault characteristics and transient energy transfer of different positions and properties are analyzed. Then, a double integral discrimination method based on PFTE is proposed to further distinguish the fault property. Considering the power flow balance, an adaptive coordination strategy of wind farms and energy dissipation resistors is proposed to deal with different AC faults. Finally, a smart fault-tackling strategy based on PFTE for AC three-phase-to-ground (TPG) faults in the MTDC wind power integration system is proposed. Under the proposed smart fault-tackling strategy, the MTDC wind power integration system achieves uninterrupted operation during any AC TPG fault at the receiving end. The experiment results confirm the applicability of the proposed fault-tackling strategy.
Voltage-Sensorless Natural Frame Control for Single-Phase CHB Converter under Distorted Grid Conditions
Authors: Shao Dashuai , Liu Jinbao , Yang Daliang , Peng Zuwen , Li Zheng
Published: January 2022

In this paper, a control scheme combining grid voltage sensorless control and natural frame control (NFC) has been proposed for single-phase cascaded H-bridge converter (CHB) under distorted grid conditions. Firstly, the virtual flux (VF) signal is estimated by a modified virtual flux estimator (VFE). Then the VF-based NFC is derived, using the estimated sinusoidal VF signal to generate the unit vectors for synchronization, which enables the omitting of the coordinate transformation, current quadrature signal generation, and phase-locked loop (PLL). Aiming at the problem that grid harmonic interference is not well considered in the conventional NFC and conventional voltage sensorless control, a current controller with enhanced harmonic-rejection ability is proposed in this paper. As a result, better steady-state performance and rapid transient response are achieved. The effectiveness of the proposed method has been verified on a prototype of the single-phase 3-cell CHB converter.
eCooking Delivery Models: Approach to Designing Delivery Models for Electric Pressure Cookers with Case Study for Tanzania
Authors: Shuma Jensen C. , Sawe Estomih , Clements Anna , Meena Shukuru B. , Aloyce Katarina , Ngaya Anande E.
Published: January 2022

This paper defines eCooking Delivery Models (eCDMs) as the activities, resources and actors needed to deliver modern electric cooking (eCooking) appliances to end-users in need of innovative clean cooking solutions in the Global South. We define the eCooking Market System (socio-economic and cultural context, the enabling environment, market chains, support services) which conceptualizes the real-world market factors and surrounding context related to enabling the uptake and sustained use of eCooking appliances by end-users. We also describe an approach to design eCDMs and identify the support services required to start and sustain the market delivery infrastructure. The eCDM concept and approach are demonstrated through designing eCDMs and support services for electric pressure cookers (EPCs) for two end-user segments in Tanzania: rural and peri-urban/urban customer segments. Research methods included: focus groups and workshops (12), household surveys (51), cooking demonstrations (11), offering end-users the chance to purchase EPCs through various financing mechanisms, and interviews (eight with market actors, 18 with enabling environment stakeholders). This led to stakeholder mapping, understanding end-users, market chains, and enabling environment, and identification of eCDMs and support services to reach the focus customer segments. The case study outcome was a plan to implement support services, which is being carried out by a Tanzanian NGO, and we reflect on progress thus far in supporting the eCooking market in Tanzania. The concept and approach can support similar action research in other contexts to accelerate the transition to modern energy cooking services.
Investigations of the Chemical Distribution in Sorbitol and Citric Acid (SorCA) Treated Wood—Development of a Quality Control Method on the Basis of Electromagnetic Radiation
Authors: Kurkowiak Katarzyna , Mayer Aaron K. , Emmerich Lukas , Militz Holger
Published: January 2022

Recent studies showed treatments with sorbitol and citric acid (SorCA) to significantly improve the dimensional stability and biological durability of wood. The industrialization of this process requires a quality control (QC) method to determine if the fixated chemicals are homogenously distributed within the piece of wood, which is essential for uniform material performance. Therefore, the objective of this work was to evaluate the use of common electromagnetic radiation-based methods to determine the degree of modification in SorCA-treated wood. Both Fourier transform infrared (FTIR) spectroscopy and near-infrared (NIR) spectroscopy have been used to create rough calibrations for the weight percent gain (WPG) prediction models. The FTIR measurements resulted in a high linear correlation between the band area ratio (BAR) and the WPG (R2 = 0.93). Additionally, a partial least square (PLS) regression of NIR spectroscopic data resulted in a model with a high prediction power (R2 = 0.83). Furthermore, X-ray density profiling emerged as a simple alternative for the QC by showing a gradient of modification chemicals inside the sample and differences in chemical uptake between earlywood and latewood. Overall, it can be concluded that the results from FTIR, NIR and X-ray densitometry can serve as indicators of impregnation chemical distribution in SorCA-modified wood.
Somatic Embryogenesis of Norway Spruce and Scots Pine: Possibility of Application in Modern Forestry
Authors: Hazubska-Przybył Teresa , Wawrzyniak Mikołaj Krzysztof , Kijowska-Oberc Joanna , Staszak Aleksandra Maria , Ratajczak Ewelina
Published: January 2022

Somatic embryogenesis (SE) is an important method for the vegetative propagation of trees. SE is the developmental in vitro process in which embryos are produced from somatic cells. This method can be integrated with other biotechnological techniques, genomic breeding and cryopreservation, which enables commercial-scale sapling production of selected high-yielding genotypes in wood production combined with fast breeding cycles. The SE is potential tool to improve plant stock in comparison with seed orchards. It can be useful for ecologically and economically important species, such as Norway spruce (Picea abies L. Karst.) and Scots pine (Pinus sylvestris L.), ensuring stable production in the era of climate change and biodiversity crisis. In this review, we summarize the current state of research on problems associated with somatic embryogenesis in P. abies and P. sylvestris.
Meta-Analysis as a Tool to Identify Candidate Genes Involved in the Fagus sylvatica L. Abiotic Stress Response
Authors: Garosi Cesare , Ferrante Roberta , Vettori Cristina , Paffetti Donatella
Published: January 2022

In this study, we aimed to evaluate whether candidate genes for abiotic stresses in Fagus sylvatica L. are also candidate genes for herbaceous plants, with the purpose of better defining the abiotic stress response model of F. sylvatica. Therefore, a meta-analysis was performed on published papers related to abiotic stress. Firstly, we carried out a systematic review regarding the activity of 24 candidate genes selected for F. sylvatica under abiotic stress reported in 503 articles. After choosing the inclusion criteria, 73 articles out of 503, regarding 12 candidate genes, were included in this analysis. We performed an exploratory meta-analysis based on the random-effect model and the combined effect-size approach (Cohen’s d). The results obtained through Forest and Funnel plots indicate that the candidate genes for F. sylvatica are considered to be candidate genes in other herbaceous species. These results allowed us to set up models of plants’ response to abiotic stresses implementing the stress models in forest species. The results of this study will serve to bridge knowledge gaps regarding the pathways of response to abiotic stresses in trees based on the meta-analysis. The study approach used could be extended to observe larger gene databases and different species.
Scanning Electron Microscopy Protocol for Studying Anatomy of Highly Degraded Waterlogged Archaeological Wood
Authors: Balzano Angela , Merela Maks , Čufar Katarina
Published: January 2022

Waterlogged archaeological wood (WAW), approximately 4500 years old, from the prehistoric pile-dwelling settlement at Ljubljansko barje, Slovenia, was examined by scanning electron microscopy (SEM). We propose a simplified protocol for sample preparation and the SEM technique for the study of highly degraded WAW of Quercus, Faxinus, Acer, Salix and Populus, representing taxa with different wood properties. We present the advantages of the proposed technique for wood identification, the observation of various anatomical features and for the study of cell wall degradation. SEM, equipped with energy-dispersive X-ray spectroscopy (EDX), allowed us to detect significant amounts of Fe, S and Ca with different appearances, amounts and distributions in the wood of the studied taxa. In the case of Populus, an increased amount of Si was also detected. The applied SEM protocol allowed characterisation of the anatomy of the highly degraded WAW while reducing the time required for sample preparation and examination under the microscope, as well as extending the lifetime of the SEM components (e.g., tungsten filament), compared to the situation when we analyse wood samples with a greater volume.
State-of-Charge Estimation of Lithium-Ion Batteries Based on Fractional-Order Square-Root Unscented Kalman Filter
Authors: Chen Liping , Wu Xiaobo , Tenreiro Machado José , Lopes António , Li Penghua , Dong Xueping
Published: January 2022

The accuracy of the state-of-charge (SOC) estimation of lithium batteries affects the battery life, driving performance, and the safety of electric vehicles. This paper presents a SOC estimation method based on the fractional-order square-root unscented Kalman filter (FSR-UKF). Firstly, a fractional second-order Resistor-Capacitance (RC) circuit model of the lithium battery is derived. The accuracy of the parameterized model is verified, revealing its superiority over integer-order standard descriptions. Then, the FSR-UKF algorithm is developed, combining the advantages of the square-root unscented Kalman filter and the fractional calculus. The effectiveness of the proposed algorithm is proven under a variety of operational conditions in the perspective of the root-mean-squared error, which is shown to be below 1.0%. In addition, several experiments illustrate the performance of the FSR-UKF.
Population Structure and Diversity in European Honey Bees (Apis mellifera L.)—An Empirical Comparison of Pool and Individual Whole-Genome Sequencing
Authors: Chen Chao , Parejo Melanie , Momeni Jamal , Langa Jorge , Nielsen Rasmus O. , Shi Wei ,   SMARTBEES WP3 DIVERSITY CONTRIBUTORS, Vingborg Rikke , Kryger Per , Bouga Maria , Estonba Andone , Meixner Marina
Published: January 2022

Background: Whole-genome sequencing has become routine for population genetic studies. Sequencing of individuals provides maximal data but is rather expensive and fewer samples can be studied. In contrast, sequencing a pool of samples (pool-seq) can provide sufficient data, while presenting less of an economic challenge. Few studies have compared the two approaches to infer population genetic structure and diversity in real datasets. Here, we apply individual sequencing (ind-seq) and pool-seq to the study of Western honey bees (Apis mellifera). Methods: We collected honey bee workers that belonged to 14 populations, including 13 subspecies, totaling 1347 colonies, who were individually (139 individuals) and pool-sequenced (14 pools). We compared allele frequencies, genetic diversity estimates, and population structure as inferred by the two approaches. Results: Pool-seq and ind-seq revealed near identical population structure and genetic diversities, albeit at different costs. While pool-seq provides genome-wide polymorphism data at considerably lower costs, ind-seq can provide additional information, including the identification of population substructures, hybridization, or individual outliers. Conclusions: If costs are not the limiting factor, we recommend using ind-seq, as population genetic structure can be inferred similarly well, with the advantage gained from individual genetic information. Not least, it also significantly reduces the effort required for the collection of numerous samples and their further processing in the laboratory.
Evolutionary Genetic Signatures of Selection on Bone-Related Variation within Human and Chimpanzee Populations
Authors: Stover Daryn A. , Housman Genevieve , Stone Anne C. , Rosenberg Michael S. , Verrelli Brian C.
Published: January 2022

Bone strength and the incidence and severity of skeletal disorders vary significantly among human populations, due in part to underlying genetic differentiation. While clinical models predict that this variation is largely deleterious, natural population variation unrelated to disease can go unnoticed, altering our perception of how natural selection has shaped bone morphologies over deep and recent time periods. Here, we conduct the first comparative population-based genetic analysis of the main bone structural protein gene, collagen type I α 1 (COL1A1), in clinical and 1000 Genomes Project datasets in humans, and in natural populations of chimpanzees. Contrary to predictions from clinical studies, we reveal abundant COL1A1 amino acid variation, predicted to have little association with disease in the natural population. We also find signatures of positive selection associated with intron haplotype structure, linkage disequilibrium, and population differentiation in regions of known gene expression regulation in humans and chimpanzees. These results recall how recent and deep evolutionary regimes can be linked, in that bone morphology differences that developed among vertebrates over 450 million years of evolution are the result of positive selection on subtle type I collagen functional variation segregating within populations over time.
Increase in Ribosomal Fidelity Benefits Salmonella upon Bile Salt Exposure
Authors: Lyu Zhihui , Ling Jiqiang
Published: January 2022

Translational fidelity is maintained by multiple quality control steps in all three domains of life. Increased translational errors (mistranslation) occur due to genetic mutations and external stresses. Severe mistranslation is generally harmful, but moderate levels of mistranslation may be favored under certain conditions. To date, little is known about the link between translational fidelity and host–pathogen interactions. Salmonella enterica can survive in the gall bladder during systemic or chronic infections due to bile resistance. Here we show that increased translational fidelity contributes to the fitness of Salmonella upon bile salt exposure, and the improved fitness depends on an increased level of intracellular adenosine triphosphate (ATP). Our work thus reveals a previously unknown linkage between translational fidelity and bacterial fitness under bile stress.
A Is for Anecdotes, Amateurs, and Anomalies: Vinciane Despret’s Case for Exceptional Interspecies Relations
Authors: McConnell Anne
Published: January 2022

In Vinciane Despret’s book, What Would Animals Say If We Asked the Right Questions?, she tells stories about animals that surprise us, that challenge our assumptions about the capabilities of animals, and that illustrate how we might best come to know them. Despret engages with the history of animal science and scientific methodology, while also turning her attention to less conventional sources of animal knowledge, such as Youtube videos, domestic animal breeders, and animal caregivers. For Despret, knowing more about animals requires knowing more with them, expanding our knowledge practices beyond conventional scientific models that often emphasize distanced observation, generalization, and laboratory research. Despret highlights relational practices that function through care and curiosity, understanding animals as collaborators, with interests and valuable input. By drawing our attention to anecdotes, amateurs, and anomalies, Despret challenges scientific conventions that dismiss all three, and illuminates fascinating stories about what animals might show us if we “ask the right questions”.
Attentive Processes and Blood Lactate in the Sambo
Authors: Coco Marinella , Buscemi Andrea , Tušak Matej , Perciavalle Vincenzo , Nifosì Alfio , Cavallari Paolo , Di Corrado Donatella , Perciavalle Valentina
Published: January 2022

Background: Sambo is a martial art and combat sport that originated in the Soviet Union. There are two main stiles, Sport Sambo and Combat Sambo which resembles modern mixed martial arts. Very little literature is available about physiological aspects of Sambo and, in particular, on the possible effects on cognitive domains. The purpose of the present research was to determine if there is a correlation between a blood lactate increase and the intensity and/or selectivity of attentions. Methods: Sixteen male athletes practicing Sambo for at least 5 years participated voluntarily in the study. Each athlete had to sustain, with an interval of one week, both a Sport Sambo match and a Combat Sambo match, each lasting 5 min. Blood lactate levels as well as attentive capacities were evaluated at three different times: at rest, i.e., 5 min before the start of the session (pre), at end of the session and 15 min after its conclusion. Reaction time protocol was used to evaluate the intensity of attention, whereas divided attention was assessed for analyzing the selectivity of attention together with errors and omissions. Results: Concerning Sport Sambo, blood lactate was 1.66 mmol/L (±0.55 SD) before the session, reached a mean value of 3.40 mmol/L (±0.45 SD) at the end of the session (end) and returned to values similar to initial ones (a mean value of 1.98 mmol/L (±0.37 SD) after 15 min (15-end). None of the attentive parameters examined, showed statistically significant differences. Conversely, for Combat Sambo, it was found a significant increase in blood lactate levels that went from 1.66 mmol/L (±0.55 SD) before the session (pre), to 4.76 mmol/L (±0.60 SD) at the end (end) and then back to values similar to those observed before the session 15 min after its conclusion (15-end), i.e., 1.97 mmol/L (±0.37 SD); however, after a Combat Sambo session increases in blood lactate were associated with significant worsening of attentional mechanisms. Conclusions: In conclusion, in all the participants, the worsening of attentional mechanisms was observed only after the Combat Sambo session in which blood lactate values exceeded 4 mmol/L. This figure, also known as the Onset of Blood Lactate Accumulation (OBLA), is commonly used to determine the anaerobic threshold.
Community Response to Noise from Hot-Spots at a Major Road in Quito (Ecuador) and Its Application for Identification and Ranking These Areas
Authors: Puyana-Romero Virginia , Cueto Jose Luis , Ciaburro Giuseppe , Bravo-Moncayo Luis , Hernandez-Molina Ricardo
Published: January 2022

Environmental legislation in Ecuador is advancing with the legitimate aspiration of providing citizens with new standards of quality and environmental health. In the context of environmental noise, these legislative advances are based on the experience accumulated in other countries, which is an advantage that must be managed with caution by incorporating local factors into noise management procedures. This study advances two lines of work. The first is to survey the population about their attitude towards noise from a major road to try to detect local factors in the annoyance and sleep disturbances. The second uses this information to compare noise indicators for the detection and ranking of hot-spots from major roads. The interviewees exhibited a high level of annoyance and sleep disturbance due to noise compared with the results of other studies. Results show that there are small differences in the definition of hot-spots when using WHO’s dose–response curves for Lden ≥ 68 dB for and for Lnight ≥ 58 dB, in comparison with the curves generated in this study (CS). Regarding the application of both dose–response curves (WHO vs. CS) to the estimation of the population at risk of the harmful effect of nighttime traffic noise (HSD), small oscillations are also observed even when Lnight ≥ 58 dB and Lnoche ≥ 60 dB are used.
Obesity and Thyroid Cancer Risk: An Update
Authors: Franchini Fabiana , Palatucci Giuseppe , Colao Annamaria , Ungaro Paola , Macchia Paolo Emidio , Nettore Immacolata Cristina
Published: January 2022

Thyroid cancer (TC) is the most common endocrine malignancy worldwide and its incidence has increased dramatically in recent years. In parallel, the prevalence of overweight and obesity has also increased, suggesting a possible link between these two diseases. Indeed, low-grade chronic inflammation, altered cytokine levels, insulin resistance, oxidative stress, and hormonal changes that occur in obese patients are all factors that contribute to the occurrence and growth of TC. In this review, the most recent evidence supporting the potential role of the mechanisms linking obesity to TC will be discussed.
Does Institutional Social Insurance Cause the Abandonment of Cultivated Land? Evidence from Rural China
Authors: Min Rui , Yang Hongxin , Mo Xu , Qi Yanbin , Xu Dingde , Deng Xin
Published: January 2022

At present, the world’s countryside needs to be revitalized urgently, and cultivated land is the critical factor in promoting the countryside’s revitalization. The reduction of uncultivated land contributes to the efficient use of rural land resources, contributing to global rural revitalization. This study uses data from 3938 Chinese peasant households conducted in 2014 and the OLS method to investigate the quantitative impact of institutional social insurance on cultivated land abandonment. The empirical results point to the following conclusions: (1) Institutional social insurance will weaken the social insurance function of land, which will lead to the generation of peasant households’ cultivated land abandonment. More specifically, for every 1% increase in the level of institutional social insurance of peasant households, the area of cultivated land abandoned increased by 0.002 mu; (2) The influence of institutional social insurance on peasant households’ cultivated land abandonment is heterogeneous, that is, endowment insurance can weaken the social insurance function of land more than medical insurance, and households with a higher proportion of pensioners are more likely to abandon cultivated land. This study’s conclusions may help understand the relationship between institutional and non-institutional social insurance and provide a reference for the effective use of cultivated land resources in the global rural revitalization.
Self-Administered Six-Minute Walk Test Using a Free Smartphone App in Asymptomatic Adults: Reliability and Reproducibility
Authors: Jesus Matheus Oliveira de , Ostolin Thatiane Lopes Valentim Di Paschoale , Proença Neli Leite , Silva Rodrigo Pereira da , Dourado Victor Zuniga
Published: January 2022

Background: The 6-min walk test (6MWT) is a simple, inexpensive, reliable, and reproducible test that provides a reasonable estimate of the cardiorespiratory fitness (CRF). We aimed to assess the reliability and reproducibility of a self-administered 6MWT in asymptomatic adults using a free smartphone app. Methods: In the 1st phase, 93 participants underwent a supervised 6MWT (6MWTsup) in a 30 m indoor corridor, using a triaxial accelerometer and their smartphones to compare the total step counts and to develop a 6-min walk distance (6MWD) prediction equation. In the 2nd phase, 25 participants performed the 6MWTsup and two self-administered 6MWTs outdoors (6MWTsa1 and 6MWTsa2, at least 48 h apart) using a free smartphone app. Results: The agreement between accelerometer- and app-based total step counts was limited (mean difference, −58.7 steps (−8.7%): 95% confidence interval, −326.5 (−46.8%) to 209.1 (29.3%)). The best algorithm for predicting the 6MWTsupm included: 795.456 + (0.815 heightm app-steps) − (1.620 ageyears) − (3.005 weightkg) − (1.155 app-steps), R2 = 0.609). The intraclass correlation coefficient between 6MWTsa2 and 6MWTsa1 was excellent (0.91: 0.81–0.96). The coefficient of variation was 6.4%. The agreement between the two self-administered tests was narrow (−1.9 (0.2%) meters: −57.4 (−9.5%) to 61.3 (9.9%)). Conclusions: The self-administered 6MWT has excellent reliability and reproducibility in asymptomatic adults, being a valuable tool for assessing CRF in community-based interventions.
One Health Action against Human Fascioliasis in the Bolivian Altiplano: Food, Water, Housing, Behavioural Traditions, Social Aspects, and Livestock Management Linked to Disease Transmission and Infection Sources
Authors: Angles René , Buchon Paola , Valero M. Adela , Bargues M. Dolores , Mas-Coma Santiago
Published: January 2022

The Northern Bolivian Altiplano is the fascioliasis endemic area with the reported highest human prevalence and intensities. A multidisciplinary One Health initiative was implemented to decrease infection/reinfection rates detected by periodic monitoring between the ongoing yearly preventive chemotherapy campaigns. Within a One Health axis, the information obtained throughout 35 years of field work on transmission foci and affected rural schools and communities/villages is analysed. Aspects linked to human infection risk are quantified, including: (1) geographical extent of the endemic area, its dynamics, municipalities affected, and its high strategic importance; (2) human population at risk, community development and mortality rates, with emphasis on problems in infancy and gender; (3) characteristics of the freshwater collections inhabited by lymnaeid snail vectors and constituting transmission foci; (4) food infection sources, including population surveys with questionnaire and reference to the most risky edible plant species; (5) water infection sources; (6) household characteristics; (7) knowledge of the inhabitants on Fasciola hepatica and the disease; (8) behavioural, traditional, social, and religious aspects; (9) livestock management. This is the widest and deepest study of this kind ever performed. Results highlight prevention and control difficulties where inhabitants follow century-old behaviours, traditions, and beliefs. Intervention priorities are proposed and discussed.
Social Group Differences in the Exposure Risk of COVID-19: A Case Study in Beijing, China
Authors: Lu Chen , Yi Xiaodi , Ren Xiaocui
Published: January 2022

Taking Beijing as a case, this paper conducted a survey to collect the characteristics of residents’ daily activities, including the mode of frequency and duration of travel, the type and environment of activities, and the duration and frequency of activities. We calculated the COVID-19 exposure risk of residents in different activities based on the exposure risk formula; the influencing factors of residents’ exposure risk were analyzed by regression analysis. The variance of residents’ COVID-19 exposure risk was calculated by coefficient of variation. The main conclusions are as follows: (1) There are differences in activity types of COVID-19 exposure risk, which are survival activity, daily activity and leisure activity from high to low. (2) There are differences in populations of COVID-19 exposure risk. Education level, occupation and income are the main factors affecting residents’ COVID-19 exposure risk. (3) There is internal inequity in the risk of COVID-19 exposure. The exposure risk was higher on work days than on rest days. Health inequities at work are highest on both work days and rest days. Among the different population characteristics, male, 31–40 years old, married, with a high school education, income level of 20,001–25,000 yuan, with a non-local rural hukou, rental housing, farmers, three generations or more living together have a greater degree of COVID-19 exposure risk.
Healthy and Happy Working from Home? Effects of Working from Home on Employee Health and Job Satisfaction
Authors: Niebuhr Fiona , Borle Prem , Börner-Zobel Franziska , Voelter-Mahlknecht Susanne
Published: January 2022

In addition to its catastrophic health effects, the COVID-19 pandemic also acts as a catalyst for new forms of work. Working from home (WFH) has become commonplace for many people worldwide. But under what circumstances is WFH beneficial and when does it increase harms to health? The aim of this study was to investigate the influence of specific characteristics of WFH for health (work ability, stress-related physical and psychological symptoms) and job satisfaction among German employees. The study is based on data from a Germany-wide panel survey with employees from different industries (n = 519). Using multiple regressions, it was found that the functionality of the technical equipment at home has positive effects on the health of employees (i.e., ability to work, stress-related symptoms) and job satisfaction. The percentual weekly amount of WFH influences stress-related symptoms, i.e., a higher amount of weekly working time WFH, was associated with more stress-related symptoms. Furthermore, it negatively influences job satisfaction. The feeling of increased autonomy leads to positive effects on employees’ job satisfaction. The results provide starting points for interventions and indicate the need for legal regulations for WFH. Further theoretical and practical implications are discussed.
Reviewing the User-Centered Design Process for a Comprehensive Gastroesophageal Reflux Disease (GERD) App
Authors: Kim Min Ji , Schroeder Sarah , Chan Shuan , Hickerson Kyle , Lee Yi-Ching
Published: January 2022

The objective of this study was to design a user-centered mobile health (mHealth) application for individuals with gastroesophageal reflux disease (GERD) and evaluate its design features and effectiveness for use by doctors. Prior to designing, our team undertook a discovery process that involved creating personas, conducting a competitor analysis and heuristic evaluation of existing apps, along with interviews with acid reflux patients. Then, we created a low-fidelity prototype, which was revised on the basis of several rounds of user testing. During the design phase, each round of user testing included a mix of surveys, concurrent think-alouds, and interviews to gather user feedback on the prototypes. Lastly, an evaluation phase consisting of gathering feedback on the user-centered design approach from user experience experts and medical doctors specialized in GERD was conducted. Overall, the final GERD app includes important features for tracking symptoms and triggers, analytics, data export, and community information, while promoting individualization, accessibility, and usability. The documentation of the design process of this app serves as a reference point for future medical app developers as it followed an empirically supported user-centered design strategy and resulted in an app which received positive feedback from users and human factors experts. We also intend to share some of the limitations due to the constrained resources, as well as potential ways to strengthen the design process for mHealth applications.
Energy Imbalance Gap, Anthropometric Measures, Lifestyle, and Sociodemographic Correlates in Latin American Adults—Results from the ELANS Study
Authors: Yépez García Martha Cecilia , Herrera-Cuenca Marianella , Ferrari Gerson , Sanabria Lilia Yadira Cortés , Hernández Pablo , Almeida Rafaela Yépez , Villar Cáceres Mónica , Gómez Georgina , Pareja Rossina , Rigotti Attilio , Kovalskys Irina , Fisberg Mauro
Published: January 2022

Overweight and obesity are often explained by an imbalance between energy intake and expenditure. This, in addition to metabolic effects, makes it difficult to assess the real state of individual energy balance. This study aims to analyze the energy gaps between intake and expenditure in the adult population of Latin America, as well as its relationships with sociodemographic variables and nutrition status, to draw an epidemiological perspective based on the trends observed. The energy imbalance gap was used to this end. The difference between energy intake and expenditure can be applied as a reference to explain whether weight equilibrium can prevent weight gain. Moreover, the energy imbalance gap allows for a better understanding of the design of public health policies. Using data from the Latin American Study of Nutrition and Health, the energy imbalance gap in adult population from eight Latin-American countries was assessed in 5994 subjects aged from 19–65. Usual dietary intake was measured using two non-consecutive 24 h dietary recalls. The sociodemographic questionnaire was supplemented by anthropometric measurements. Physical activity was measured through the long International Physical Activity Questionnaire. Energy expenditure was obtained using the basal metabolic rate. For the overall sample, the mean energy intake was 1939.1 kcal (95% CI: 1926.9; 1951.3), the mean of energy expenditure was 1915.7 kcal (95% CI: 1906.4; 1924.9), and the mean of energy imbalance gap was 23.4 kcal (95% CI: 11.9; 35.0). Results show that energy intake and expenditure were higher in men. Moreover, subjects aged 19–34, of high socioeconomic level, who completed high school, were mestizos and were of normal weight consumed the highest number of calories. Overall, a positive energy imbalance gap was observed. Overweight and obese from Argentina, Costa Rica, Ecuador, Peru, and Venezuela showed a significantly lower energy imbalance gap than underweight subjects. These findings confirm the high variability of energy imbalance gap and the accompanying correlates of energy intake and expenditure. Further research is needed to specifically address interventions in low and middle-income countries such as many in Latin America, to help reduce the prevalence of obesity and eradicate undernutrition.
Environmental Regulation, Corporate Economic Performance and Spatial Technology Spillover: Evidence from China’s Heavily Polluting Listed Corporations
Authors: Gu Xuesong , An Xiaoran , Liu Andong
Published: January 2022

The relationship between environmental regulation, technology spillover, and economic performance has been the subject of intense scholarly debate in environmental economics for many years. The famous Porter hypothesis states that environmental regulation promotes both the economic performance and the environmental performance of corporations. However, the existing literature has paid relatively little attention to micro-level research and spatial spillover effects. This article endeavors to fill this gap by an empirical analysis of a sample of 900 of China’s heavily polluting listed corporations for the period of 2013–2016. By utilizing spatial econometric methods to measure spatial direct and indirect effects and decomposing total factor productivity change into technical change, pure efficiency change, and scale efficiency change, we find that environmental regulation promotes corporate total factor productivity but widens the disparity between profitable and unprofitable corporations. Our results also suggest that the direct and indirect effects of environmental regulation and corporate profitability on promoting total factor productivity rely heavily on the efficiency changes, while the contribution of the key component, technical change, is insignificant.
A Novel Integration of IF-DEMATEL and TOPSIS for the Classifier Selection Problem in Assistive Technology Adoption for People with Dementia
Authors: Ortíz-Barrios Miguel Angel , Garcia-Constantino Matias , Nugent Chris , Alfaro-Sarmiento Isaac
Published: January 2022

The classifier selection problem in Assistive Technology Adoption refers to selecting the classification algorithms that have the best performance in predicting the adoption of technology, and is often addressed through measuring different single performance indicators. Satisfactory classifier selection can help in reducing time and costs involved in the technology adoption process. As there are multiple criteria from different domains and several candidate classification algorithms, the classifier selection process is now a problem that can be addressed using Multiple-Criteria Decision-Making (MCDM) methods. This paper proposes a novel approach to address the classifier selection problem by integrating Intuitionistic Fuzzy Sets (IFS), Decision Making Trial and Evaluation Laboratory (DEMATEL), and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). The step-by-step procedure behind this application is as follows. First, IF-DEMATEL was used for estimating the criteria and sub-criteria weights considering uncertainty. This method was also employed to evaluate the interrelations among classifier selection criteria. Finally, a modified TOPSIS was applied to generate an overall suitability index per classifier so that the most effective ones can be selected. The proposed approach was validated using a real-world case study concerning the adoption of a mobile-based reminding solution by People with Dementia (PwD). The outputs allow public health managers to accurately identify whether PwD can adopt an assistive technology which results in (i) reduced cost overruns due to wrong classification, (ii) improved quality of life of adopters, and (iii) rapid deployment of intervention alternatives for non-adopters.
Associations of Alcohol and Tobacco Retail Outlet Rates with Neighborhood Disadvantage
Authors: Wheeler David C. , Boyle Joseph , Barsell D. Jeremy , Glasgow Trevin , McClernon F. Joseph , Oliver Jason A. , Fuemmeler Bernard F.
Published: January 2022

Tobacco causes 29% of cancer-related deaths while alcohol causes 5.5% of cancer-related deaths. Reducing the consumption of these cancer-causing products is a special priority area for the National Cancer Institute. While many factors are linked to tobacco and alcohol use, the placement and density of retail outlets within neighborhoods may be one community-level risk factor contributing to greater use of these products. To elucidate associations between tobacco, alcohol, and tobacco and alcohol retail outlets (TRO, ARO, and TARO) and neighborhood disadvantage over a large geographic area, we employed a novel Bayesian index modeling approach to estimate a neighborhood disadvantage index (NDI) and its associations with rates of the three types of retailers across block groups in the state of North Carolina. We used a novel extension of the Bayesian index model to include a shared component for the spatial pattern common to all three types of outlets and NDI effects that varied by outlet type. The shared component identifies areas that are elevated in risk for all outlets. The results showed significant positive associations between neighborhood disadvantage and TROs (relative risk (RR) = 1.12, 95% credible interval (CI = 1.09, 1.14)) and AROs (RR = 1.15, 95% CI = 1.11, 1.17), but the association was greatest for TAROs (RR = 1.21, 95% CI = 1.18, 1.24). The most important variables in the NDI were percent renters (i.e., low home ownership), percent of homes built before 1940 (i.e., old housing stock), and percent without a high school diploma (i.e., low education).
Comparison of the Purchasing Behaviour of Polish and United Kingdom Consumers in the Organic Food Market during the COVID-19 Pandemic
Authors: Wojciechowska-Solis Julia , Kowalska Aleksandra , Bieniek Milena , Ratajczyk Monika , Manning Louise
Published: January 2022

The main objective of the study was to compare young consumer purchasing behaviour towards organic food in Poland (PL) and the United Kingdom (UK), countries with different levels of organic market maturity. The study was conducted by means of an online survey questionnaire during the COVID-19 pandemic between December 2020 and February 2021. The sample consisted of 862 PL and 161 UK consumers. 31% of PL respondents and 58.4% of UK respondents indicated they purchase organic products. Descriptive statistics, the Mann–Whitney U test and the two proportion Z test were used for statistical analyses. The results indicate that young consumers pay particular attention to the freshness and quality of consumed products. Concern for their own health and that of their loved ones, as well as the desire to eat better-quality products were the main motivations for the respondents to purchase organic products. Organic vegetables and fruits, eggs, dairy products, and meat and meat products, were among the most frequently purchased products in the studied cohorts. Experts (e.g., a dietitian, physician) were declared to be the first source of information concerning food products for young consumers. Next, family members were indicated. Social media content (PL respondents) and information from websites managed by institutions (UK respondents) were mentioned as the third source. UK consumers preferred short supply chains. The present study can be used by government bodies and companies to select the most effective communication channels for education and advertising and to develop effective commercial strategies aimed at young consumers.
Inhibition and Calendar Age Explain Variance in Game Performance of Youth Soccer Athletes
Authors: Heilmann Florian , Wollny Rainer , Lautenbach Franziska
Published: January 2022

The assessment of core executive functions (EFs; i.e., inhibition, working memory, cognitive flexibility) has often been presented as a diagnostic tool for evaluating cognitive functions in recent publications. For example, EFs are essential in soccer because players must quickly adapt, change strategies, and inhibit responses in rapidly changing game situations. Previous research has shown relations between (subjectively rated) game performance and the EFs of soccer players. Nevertheless, the previous studies’ samples were heterogeneous in their performance level (experts vs. amateurs), and the ratings were rather unsystematic (no validated rating protocol). Therefore, the current study aimed to predict soccer players’ game performance (i.e., systematically rated by coaches) with the help of EF performance. Therefore, we assessed the game performance (small-sided game, Game Performance Assessment Instrument [GPAI]) and EFs (inhibition: flanker task; working memory: 3-back task; cognitive flexibility: number-letter task) of 94 male soccer players (12–19 years old) from Germany’s highest competitive level. Multiple regression model results indicate that inhibition (i.e., flanker effect) and calendar age explain ~18% of players’ game performance variance. Results have to be interpreted with regard to the age-dependency of game performance and EFs. In conclusion, even though the results are based on a cross-sectional study, it appears that calendar age needs to be considered when assessing EFs.
Changes in Viewer Engagement and Accessibility of Popular Vaping Videos on TikTok: A 12-Month Prospective Study
Authors: Rutherford Brienna N. , Sun Tianze , Lim Carmen C. W. , Chung Jack , Cheng Brandon , Davidson Lily , Tisdale Calvert , Leung Janni , Stjepanović Daniel , Connor Jason P. , Chan Gary C. K.
Published: January 2022

Aim: There are concerns regarding what young people are exposed to on TikTok due to trending content promoting e-cigarette use through humour, marketing and lifestyle acceptability. Using baseline data from November 2020, we aimed to examine how much content from a sample of popular vaping videos remained accessible at 9- and 12-month follow-ups. We aimed to monitor changes in viewer engagement (using metadata) before and after the U.S. Congressional Hearing on youth protection measures on social media in October 2021. Methods: Hashtag-based keywords were used to collect the most viewed publicly available e-cigarette related videos on TikTok (N = 802) from inception to November 2020 to form a baseline. Researchers conducted a longitudinal descriptive study using this data, with 9- and 12-month follow-ups to measure changes in viewer engagement (using metadata) and content availability. Findings: Of the 802 videos from the baseline, 562 remained at the 9-month follow-up and 511 remained at the 12-month follow-up. At the 12-month follow-up, the majority of vaping-related hashtags were removed by TikTok after the Congressional Hearing. Between the baseline and 9-month follow up, views increased by 1.4% and likes increased by 4.4%. At 12-month follow-up, views had increased by 1.7% and likes by 4.2% compared to baseline data. Whilst 291 videos were no longer publicly accessible at 12-month follow-up, 39 of these were made inaccessible by the content creators. The most viewed and most liked vaping videos at baseline were still publicly available. Conclusions: Whilst the depiction type and thematic distribution of removed videos suggest that TikTok may be removing a small proportion of content that promotes the use of e-cigarettes, metadata of remaining videos indicate an increase in viewer engagement. TikTok’s removal of explicit substance-related hashtags from the platform could be a step towards preventing adolescents from being exposed to harmful behaviours and substances online. However, the platform should consider enforcing effective age restrictions on content that promotes substance use in a positive light.