bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of additive particle size on the anti-corrosion behavior of PU coating
Authors: Tan Hai , Guo Yanbao , Wang Junqiang , Wang Deguo , Cui Yongjie 
Published: February 2021

Purpose
The purpose of this study is to investigate the influence of additive particle size on the anti-corrosion behaviors of polyurethane (PU) coating.

Design/methodology/approach
The graphite (Gr) and poly-graphite (PGr) were used as large size additive and small size additive, respectively. The immersion test and electrochemical test were used to study the corrosion behaviors.

Findings
In the immersion test, the surface of the bare steel sample was corroded uniformly. However, for the steel samples with coatings, the surfaces were corroded locally. This phenomenon showed that the coating can isolate artificial sea-water and samples and then decreased the corrosion rate. Furthermore, the most severe corrosion was observed on the sample with the Gr/PU coating compared with other anti-corrosion coatings. The results of the electrochemical measurements indicated that the corrosion rate of the sample with PGr/PU coating was approximately two times lower than that of the sample with the Gr/PU coating and the sample with PGr/PU coating was hardest to be corroded.

Originality/value
To have a more objective and direct recognition of the particle size effect on the coating quality.
Catching silver consumers in China: an integrated model of Chinese older adults' use of social networking technology
Authors: Su Jin , Tong Xiao 
Published: February 2021

PurposeThis study aims to gain a more holistic understanding of Chinese older adults' perceptions and use of social networking technology.Design/methodology/approachGrounded in the extended unified theory of acceptance and use of technology (UTAUT2) and expectation-confirmation (ECM) theory, the study proposed an integrated social media user engagement model and tested the model utilizing the data collected from 323 Chinese older adults.FindingsThe results reveal that half of the relationships in the proposed model were supported. Specifically, performance expectancy, facilitating conditions, social influence and hedonic motivation were all found to have a significant positive influence on perceived value. In addition, the results confirmed the positive impact of facilitating conditions on satisfaction. Both perceived value and satisfaction were also found to have a significant positive effect on Chinese older adults' intention to engage in social networking technology.Originality/valueChinese older adults are embracing Internet technologies at a greater rate; thus, understanding their perspectives of social networking technology offers valuable insights. This empirical study enhances understanding of the nature and strength of the relationships in the proposed integrated social media user engagement model in the context of Chinese older adults.
Socio-economic impact of COVID-19 on Ghana's economy: challenges and prospects
Authors: Aduhene David Tanoh , Osei-Assibey Eric 
Published: February 2021

PurposeThe world's economies are on their knees following the negative impact of the coronavirus pandemic over the past 8 months. Growing number of researches has been conducted on the impact of COVID-19 pandemic on developed countries with little attention on developing countries, who are still grappling with the negative impact of the coronavirus. The rationale for this study is to assess the socio-economic impact of COVID-19 on Ghana's economy and government response to the pandemic as well as policy options to revive the ailing economy.Design/methodology/approachThis study explored the socio-economic impact of the coronavirus on Ghana's economy using a discourse analysis with data from various secondary sources to analyze the impact of the pandemic from the Ghanaian perspective.FindingsThe findings from the discourse analysis revealed that the coronavirus pandemic has negatively impacted on the socio-economic situation of the citizens of Ghana. Whiles an estimated 42,000 people lost their jobs in the first two months of the pandemic in Ghana, tourist attraction sector of the country alone lost $171 million dollars in the past three months due to the partial lockdown and closure of tourism and hospitality centers in the country. The study revealed that Ghana's healthcare system has been overwhelmed by the number of increasing cases in the country to extent of making use of temporary structures as isolation and treatment centers of the pandemic. The study revealed that Ghana may convert these challenges posed by the COVID-19 pandemic into prospects and opportunities by investing massively in the health sector and creating support for the SMEs which creates massive employment for many Ghanaians.Research limitations/implicationsThis study focuses on the impact of the COVID-19 on Ghana's economy and how the pandemic has negatively affected the country. The study is an exploratory study that makes use of secondary data. However, conducting a study with primary data sources from specific communities or regions in the country may not produce the same results. The results from the primary level or community level may be different from the general results obtained from the study. In future it is expected that the study focuses specifically on the extent of the coronavirus pandemic on Ghana's fiscal deficit which seems to have ballooned in recent times.Originality/valueThe study is the first of its kind to extensively explore the socio-economic impact of the COVID-19 pandemic on the Ghanaian economy. The novelty of this paper is that it recognizes governments response to the pandemic and proposes three practical measures adopted to put the country's economy back on its feet through survive, revive and ensuring growth in all sectors of the economy.
Robust visual-inertial odometry with point and line features for blade inspection UAV
Authors: Ma Yufei , Wang Shuangxin , Yu Dingli , Zhu Kaihua 
Published: February 2021

Purpose
This paper aims to enable the unmanned aerial vehicles to inspect the surface condition of wind turbine in close range when the global positioning system signal is not reliable, and further improve its intelligence. So a visual-inertial odometry with point and line features is developed.

Design/methodology/approach
Visual front-end combining point and line features, as well as its purification strategies, are first presented to improve the robustness of feature tracking in low-textured scene and rapidity of segment detector. Additionally, the inertial measurement is integrated between keyframes as constrain to reduce tracking error existed in visual-only system. Second, the graph-based visual-inertial back-end is constructed. To parameterize line features effectively, the infinite line representation not sensitive to outdoor light is employed, in which Plücker and Cayley are selected for line re-projection and nonlinear optimization. Furthermore, Jacobians of the line re-projection errors are analytically derived for better accuracy.

Findings
Experiments are performed in various scenes of the wind farm. The results demonstrate that the tight-coupled visual-inertial odometry with point and line features is more precise on all the samples than conventional algorithms in complex wind farm environments. Additionally, the constructed line feature map can be used in the following research for autonomous navigation.

Originality/value
The proposed visual-inertial odometry works robustly in strong electromagnetic interference, low-textured and illumination-change wind farm.
Lifting the lid on the black box of corporate real estate decision-making; dealing with surplus property
Authors: Cooke Howard , Appel-Meulenbroek Rianne , Arentz Theo 
Published: February 2021

Purpose
The purpose of this paper is to identify the variables that influence corporate real estate (CRE) decision-making and gauge their relative importance to each other, thereby understanding the consequent challenges/implications for CRE managers (CREM’s).

Design/methodology/approach
Interviews were undertaken with experienced CREM’s using the causal network elicitation technique to create decision networks for the variables they considered for the specifically defined scenario: dealing with surplus property from a change of business strategy. These networks illustrate the complexity of the mental representations required for the realignment of the CRE portfolio. The key variables are more extensive than alignment theory suggests, namely, financial stakeholders. Additional variables identified include risk, lease accounting, costs, financial analysis, business metrics and motivational drivers. The latter indicates the importance of self-esteem and peer recognition for CREM’s and financial benefits for the C-suite. Accordingly strategy alignment needs to incorporate CRE both in terms of strategy creation and implementation.

Findings
These networks illustrate the complexity of the mental representations required for the realignment of the CRE portfolio. The key variables are more extensive than alignment theory suggests, namely, financial stakeholders. Additional variables identified include risk, lease accounting, costs, financial analysis, business metrics and motivational drivers. The latter indicates the importance of self-esteem and peer recognition for CREM’s and financial benefits for the C-suite. Accordingly, strategy alignment needs to incorporate CRE both in terms of strategy creation and implementation.

Originality/value
This research appears to be the first that looks in detail at the mental representations used by decision-makers while making CRE decisions.
Optimal pricing strategy in uncertain dual distribution channel with retail services
Authors: Farham-Nia Saied , Ghaffari-Hadigheh Alireza 
Published: February 2021

Purpose
The aim of this paper is to study the optimal pricing decision in a supply chain with a dual distribution channel in a centralized and decentralized decision-making systems and investigate the economic impact of retail services on pricing behaviors with respect to the power structures.

Design/methodology/approach
To reach the equilibrium behavior of decision-makers, two-stage optimization, the Stackelberg game and the Bertrand–Nash game have been used. Also, to explore the effect of environmental uncertainty on the behavior of decision-maker, demand functions are characterized as an uncertain price dependent, service dependent and channel dependent. Decision parameters are based on experts’ belief degree, in the sense of uncertainty theory initiated by Liu (2007).

Findings
Obtained results reveal that the retail services have a strategic role in the centralized supply chain and the decentralized supply chain with dominant manufacturer, while both the supply chain and the consumer suffer from higher environmental indeterminacy.

Research limitations/implications
This study is based on possible scenarios of dual distribution system only. Further research is recommended to investigate the applicability of the authors framework in different distribution systems.

Practical implications
The study findings are believed to be valuable for supply chains and organizations about to make a strategic decision on price of their good/service.

Originality/value
The paper contributes to the scarce literature on Uncertainty Theory initiated by Liu (2007), and combination of it with Game Theory for pricing in distribution system of supply chains. The study also contributes by investigating impact of non-price competitive factor (level of service) on pricing strategy.
Investigating thermal supplementation of an aquaponics system under severe climate conditions
Authors: Van Beukering Chris , Hertzog Pierre , Swart Arthur James 
Published: February 2021

Purpose
Climate change strains scarce water resources and food production infrastructure, necessitating establishment of sound scientific basis for operation of sustainable alternative food production methodologies - such as aquaponics, which promises high yield versus small footprint. In a climate (such as in Bloemfontein, South Africa) including temperatures below freezing, real-time aquaponics monitoring and control is necessary to mitigate thermal losses and to ensure sustainability of fish stock and bio-filter micro-organisms. The system thermal energy also needs sustainable supplementation during wintertime. This study/paper aims to address the problem of monitoring and controlling thermal energy in a medium sized aquaponics system, to ensure biological sustainability, especially during extreme cold weather events.

Design/methodology/approach
Required supplementation was determined and the aquaponics system described and quantified in terms of mass-flow power transfer by measuring loop differential temperature and flow rate. Cold front temperature data evaluation determined implementation suitability and -sustainability. Subsystem temperature contributions to the main reservoir, and their cumulative influence on the biological component, were considered.

Findings
Results indicate thermal supplementation enabled 1.3 °C temperature loss mitigation for a 42-kl water reservoir over a period of three days, offsetting severe system temperature decrease during a cold front event, and preventing organism mortality

Originality/value
Quantification of flow loop power transfer, and successful supplementation monitoring and control, demonstrates the approach and implementation merit in the Bloemfontein area. Wi-Fi-enabled online real-time data potentially facilitates incorporation into the concept of “Sustainable Smart Cities”.
Low spatial congruence between temporal functional β‐diversity and temporal taxonomic and phylogenetic β‐diversity in British avifauna
Authors: Tsianou Mariana A. , Touloumis Konstantinos , Kallimanis Athanasios S. 
Published: February 2021

AbstractAssessing spatial and temporal patterns of biodiversity change is essential to understand how communities vary over time and confront to environmental changes for the resilience of ecosystem functioning. We use data from two bird atlases of Britain collected during the breeding periods 1988–1991 and 2008–2011 to measure temporal β‐diversity of taxonomic, functional and phylogenetic dimensions and examine the relationship and the level of congruence of the three dimensions of temporal β‐diversity and their respective partitioned components (turnover‐nestedness). Temporal β‐diversity, turnover and nestedness patterns were highly congruent for the taxonomic and phylogenetic dimension, although these dimensions were weakly associated with the functional dimension. We found higher levels of temporal changes for the taxonomic (mean Jaccard β‐diversity 0.27) and phylogenetic (mean Jaccard β‐diversity 0.21) dimensions than for the functional dimension (mean Jaccard β‐diversity 0.09), implying that despite the changes in species composition the functional composition of the communities remained less affected. For taxonomic and phylogenetic dimensions, turnover contributed more than nestedness to shaping β‐diversity, while for functional β‐diversity the two components contributed similarly. Communities at higher altitudes were also more functionally similar in 20 years but with more changes in taxonomic and phylogenetic diversity possibly due to environmental filtering. We hypothesize that the low congruence might be due to species with extreme trait values persisting throughout time and retaining the volume of functional space and thus contributing to the low temporal change of functional diversity despite the high levels of change in species composition, perhaps an indication of functional “stability.”
Inverted colonic diverticulum: An endoscopic examination and presentation
Authors: Gulaydin Nihat , Iliaz Raim , Ersoz Feyzullah 
Published: February 2021

ObjectiveWe aimed to determine the frequency, morphological features, differential diagnosis, possible adverse events of inverted colonic diverticulum (ICD), which may be misdiagnosed as polyps.MethodsIn all, 810 patients who underwent a colonoscopy between April 2016 and November 2019 were included in the study, and their data were evaluated retrospectively. Colonoscopic procedures were performed at a single center by the same endoscopist.ResultsAmong all the 810 patients, the prevalence of diverticulum was 29.58% (121/409) in men and 25.19% (n = 101/401) in women, respectively. ICD was observed in 1.73% (n = 14) of all patients, including 11 (78.57%) men (aged 63.2 ± 12.95 years [range 47–90 years]) and three women (60.3 ± 4.04 years [range 58–65 years]). Most (63.16% [12/19]) ICD lesions were localized in the sigmoid colon. And the diagnosis was confirmed by eversion using biopsy forceps in 78.95% of them. One patient developed perforation after polypectomy with hot biopsy forceps and was treated by surgical operation.ConclusionsICD is a common lesion that may lead to serious adverse events if misdiagnosed as polyps. Differential diagnosis of ICD is crucial during the colonoscopy.
Elevation and leaf litter interact in determining the structure of ant communities on a tropical mountain
Authors: Moses Jimmy , Fayle Tom M. , Novotny Vojtech , Klimes Petr 
Published: February 2021

AbstractTropical mountains encompass a wide range of environmental conditions and are useful models for studying drivers of community structure. Invertebrate species richness and abundance show various elevational patterns. However, the drivers of these differences are not well understood, although microhabitat complexity is potentially important. We studied ground‐dwelling ants using pitfall trapping and hand collection on Mt. Wilhelm (Papua New Guinea) from 169 to 3,795 m a. s. l. We tested for the effects of elevation and leaf litter depth (as a measure of microhabitat complexity) on ant abundance, species richness, and composition. We sampled 118 species, with ants present up to 2,331 m a. s. l. Species richness peaked at mid‐elevation (~700 m), but the elevational pattern for abundance varied depending on sampling scale. Leaf litter depth negatively affected abundance once elevation had been accounted for, while elevation and litter depth had an interactive effect on species richness. Species richness was positively related to litter depth at lower elevations, but negatively above ~ 700 m. Species composition varied with elevation and less strongly with leaf litter depth. We speculate that in the lowlands, litter depth rather than temperature limits ant communities. At high elevations, the deeper litter decreases temperature of the litter layer, and temperature becomes limiting. At mid‐elevations, temperature is not yet too low, and litter is still relatively deep, hence generating a mid‐elevation peak in ant richness. Our results may explain differing richness‐elevation patterns of litter arthropods around the world and provide testable predictions for future studies on this topic.
Neurofilament light chain levels reflect outcome in a patient with glutamic acid decarboxylase 65 antibody–positive autoimmune encephalitis under immune checkpoint inhibitor therapy
Authors: Piepgras Johannes , Müller Aneka , Steffen Falk , Lotz Johannes , Loquai Carmen , Zipp Frauke , Dresel Christian , Bittner Stefan 
Published: February 2021

AbstractNeurological immune‐mediated side effects are rare but often severe complications of immune checkpoint inhibitor (ICI) treatment. This report describes a severe case of nivolumab/ipilimumab‐associated glutamic acid decarboxylase 65–positive autoimmune encephalitis. It proposes neurofilament light chain levels, a biomarker indicating axonal damage, in the cerebrospinal fluid and serum as a putative novel biomarker for this diagnostically and therapeutically challenging entity with an often unfavorable outcome. Additionally, we provide an overview of previous reports of patients developing autoimmune encephalitis under ICI treatment.
Biogenic amines content changes during storage and establishment of shelf life prediction model of red bean curd
Authors: Li Xingyan , Meng Jiahui , Zeng Qingzhi , Xiong Xiaolin , Ren Xueyan , Kong Qingjun 
Published: February 2021

AbstractSensory evaluation, physicochemical indicator, and microbiological indicator of red bean curd storaged at different temperature were examined. In addition, biogenic amines (BAs) were also quantified using high‐performance liquid chromatography to determine their levels in red bean curd. The BAs content is the main factors affecting the safety of red bean curd products. Four bioamines (putrescine, cadaverine, tyramine, and histamine) were detected in red bean curd during storage, but tryptamine and phenylethylamine were not detected. The results showed that total acid and tyramine content were negatively correlated with sensory scores, which were chosen as key indicators, and a shelf‐life prediction model was developed using the Arrhenius equation, the relative error of shelf life prediction model was less than 10%. This study provided a basis for intelligent predictive of package, storage, and circulation of red bean curd, which can help solve in different temperature and storage conditions of fermented bean curd storage differences of practical problems.
Perceptions of people with intellectual and developmental disabilities about COVID‐19 in Spain: a cross‐sectional study
Authors: Amor A. M. , Navas P. , Verdugo M. Á. , Crespo M. 
Published: February 2021

AbstractBackgroundAs the world battles COVID‐19, there is a need to study the perceptions of people with intellectual and developmental disabilities (IDD) about the effects of the pandemic and associated lockdown on their lives. This work explores the perceptions of Spaniards with IDD during the lockdown with respect to four topics: access to information, emotional experiences, effects on living conditions and access to support.MethodsThe topics were explored using a subset of 16 closed‐ended questions from an online survey. In total, 582 participants with IDD completed the survey. The frequencies and percentages of responses to the questions were calculated, and chi‐square tests performed to explore the relationship between participants' sociodemographic characteristics and responses. Given that people differed in the way in which they completed the survey, the relationship between participants' responses and completion method was also analysed.ResultsParticipants reported that the pandemic and subsequent lockdown have had a deleterious effect on their emotional well‐being (around 60.0% of participants) and occupations (48.0% of students and 72.7% of workers). Although access to information and support was reportedly good overall, being under the age of 21 years and studying were associated with perceptions reflecting poorer access to information (V = .20 and V = .13, respectively) and well‐being support (V = .15 and V = .13, respectively). Being supported by a third party to complete the survey was consistently related to perceptions of worse outcomes.ConclusionsThe study yielded data on the perceptions of people with IDD regarding the effects that COVID‐19 and the subsequent lockdown have had on their lives. Suggestions on how to overcome the difficulties reported and future lines of research are discussed.