bluuebunny/crossref_metadata_2025 huggingface dataset:
Wireless Communication System Performance in M2M Nakagami-m Fading Channel
Authors: Nešić Milutin , Milošević Nenad , Spalević Petar , Nikolić Zorica , Smilić Marko
Published: February 2023

In this paper, we investigate a wireless mobile communication system with a cooperative network operating over a mobile-to-mobile (M2M) fading channel in the presence of co-channel interference. Since there is no direct line of sight between the source (S) and the destination (D) due to various obstacles, the signal transmission takes place by using a relay (R). We modeled and represented the desired signal and co-channel interference by using the Nakagami-m fading distribution from the source (S) to the relay (R), as well as from the relay (R) to the destination (D). As the popularity of M2M communication has increased in 5G cellular networks, the performance analysis of the proposed system is of great importance. We derived closed-form expressions for the probability density function (PDF) and cumulative distribution function (CDF) of the signal-to-interference ratio (SIR) at the input of the destination station. Based on the cumulative distribution function (CDF), we also evaluated the outage probability (Pout) of the proposed communication system. In addition, we derived a closed-form approximate expression for the level crossing rate (LCR) by using the Laplace approximation formula for the three-fold integral. Validity of the derived theoretical results we approved by Monte Carlo simulations.
Dry and Wet Deposition Fluxes and Source of Atmospheric Mercury in the Forest in Southeast China
Authors: Dong Hanying , Kang Xinyuan , Deng Sixin , Huang Minjuan , Chang Ming , Wang Xuemei
Published: February 2023

Studying atmospheric mercury (Hg) deposition in a forest system is a key step to understanding Hg biogeochemical cycles. However, observations based on Hg deposition fluxes in worldwide stations under forest ecosystems tend to differ considerably. In this work, a sampling station was set up in Dinghu Mountain to study the atmospheric Hg’s dry and wet deposition in typical forest ecosystems in Southeast China. One hundred and two atmospheric dry and wet deposition samples were collected with an automatic sampler from March 2009 to February 2010, and concentrations of Hg, magnesium (Mg), calcium (Ca), cadmium (Cd), copper (Cu), zinc (Zn), lead (Pb), and chromium (Cr) were detected. The results showed that the annual rainfall weighted average Hg concentration was 56.8 ng L−1, and 79.8 ng L−1 in the dry deposition. The mean total deposition flux was 158.8 μg m−2, and the wet deposition was predominant. The highest and lowest concentrations were detected in the high-temperature rainy season. Generally, the wet deposition flux was notably positively correlated with the rainfall. The source of atmospheric Hg deposition in Dinghu Mountain was analyzed using principal component analysis (PCA). The main source of Hg in precipitation was soil dust, followed by coal and fuel (automobile exhaust). The primary source of Hg in dry deposition was fuel (automobile exhaust), followed by soil dust, which indicates that Dinghu Mountain has been polluted by the anthropogenic sources of Hg.
Intra-Stakeholder Heterogeneity Perspective on the Hybridity of Competing Institutional Logics for Social Enterprises
Authors: Bae Tae Jun , Fiet James O.
Published: February 2023

Both academics and businesspeople are interested in how to make social enterprises sustainable. The focus of this research is on the different kinds of stakeholders within a group that make it easier for competing logics to coexist in social enterprises. Based on intra-stakeholder heterogeneity and competing institutional logics, we identify key sub-categories among market stakeholders such as investors, customers, and employees. We tested our hypotheses using survey data collected from 190 social enterprises in Korea. Our research shows that the hybridity of competing logics is better when there are more ethical investors in the investor stakeholder group and cross-sector employees in the employee stakeholder group. However, impure altruistic buyers do not have much of an impact on the hybridity of competing logics among consumer stakeholder groups. Our study’s analysis of intra-stakeholder heterogeneity provides theoretical insight into the hybridity of institutional logics in social entrepreneurship. This study also makes the practical suggestion that in order to achieve hybridity, managers of social enterprises should put in a lot of time and effort to understand the different institutional logics of within-group stakeholders.
Soil Erosion Modelling and Accumulation Using RUSLE and Remote Sensing Techniques: Case Study Wadi Baysh, Kingdom of Saudi Arabia
Authors: Ejaz Nuaman , Elhag Mohamed , Bahrawi Jarbou , Zhang Lifu , Gabriel Hamza Farooq , Rahman Khalil Ur
Published: February 2023

This study examines the sediment retention in Wadi Baysh using the Revised Universal Soil Loss Equation (RUSLE) and TerrSet models, accompanied by integrated remote sensing and Geographic Information System (GIS) techniques. The contribution of this study is mainly associated with the application of TerrSet integrated with high resolution datasets to precisely estimate sediments load, which provide useful information to operate dams and improve the operational efficiency of dams. The Advanced Land Observing Satellite (ALOS) Phased Array type L-band Synthetic Aperture Radar (PALSAR) data are utilized to delineate the basin and have been used as an input to the TerrSet model. The rainfall erosivity (R factor) was calculated using the Climate Hazards Center Infrared Precipitation with Stations (CHIRPS) in the research area during 2015–2020. The soil erodibility (K factor) and LULC categorization are calculated using the digital soil map of the world (DSMW) and Sentinel-2 datasets, respectively. The R factor calculated for Wadi Baysh ranges between 91.35 and 115.95 MJ mm/ha/h/year, while the estimated K factor ranges from 0.139 to 0.151 t ha h/ha M. The Support Vector Machine (SVM) method categorized LULC of the study area into four major classes including barren land (81% of the total area), built-up area (11%), vegetation (8%), and water bodies (1%). Results from the sediment retention module (TerrSet) indicated that each year, 57.91 million tons of soil loss occurred in the basin. The data show that soil loss is greater in the northeast and south, whereas it is typical in the middle of Wadi Baysh. It is concluded from the current analyses that the dam lake of Wadi Baysh, located downstream, will be filled soon in the coming few years if sediment loads are carried to the lake at the same rate. Surface dam operators can obtain a full understanding of sedimentation and take proactive measures to reduce its influence on dam operations by leveraging TerrSet’s sophisticated capabilities.
Rational Layout of Taxi Stop Based on the Analysis of Spatial Trajectory Data
Authors: Liu Weiwei , Zhang Chennan , Zhang Jin , Sharma Pradip Kumar , Alfarraj Osama , Tolba Amr , Wang Qian , Tang Yang
Published: February 2023

The implementation of the relevant management system makes the road-parking behavior standardized, while increasing the difficulty of temporary parking of operational vehicles such as taxis. Therefore, in order to improve the relevant management measures and promote the sustainable development of the taxi industry, it is necessary to survey the demand for taxi parking and study the layout of taxi stops. To process the GPS data of the taxis, and to extract the loading and unloading positions of the passengers from the spatial trajectory data, big data analysis technology is used. Compared with the data obtained using traditional survey means, the spatial trajectory data reflects the situation of the whole system, which can make the analysis more accurate. K-means cluster analysis was used to determine community demand. Finally, the immune optimization model was used to determine the optimal taxi stand location. The problem of taxi stand location at the level of urban network from two dimensions of quantity and spatial distribution is solved in this paper. The location of 10 taxi stands can not only meet the parking needs of regional taxis, but also reasonably allocate urban resources and promote sustainable development. This study also has a certain reference value for relevant management departments.
Eco-Sustainable Recycling of Cement Kiln Dust (CKD) and Copper Tailings (CT) in the Cemented Paste Backfill
Authors: Al-Bakri Ali Y. , Ahmed Haitham M. , Hefni Mohammed A.
Published: February 2023

Cement global demand shows continued growth and a significant increase in the production volume, which may negatively impact the non-renewable natural resources and the environment, which is incompatible with sustainability goals. Cement kiln dust (CKD) is a primary concern associated with clinker manufacturing as a waste byproduct. Similarly, the mining industry produces copper tailing as unwanted material while beneficiating the ore, creating environmental problems due to difficulty in managing worldwide generated quantities that reach billions of metric tons. This study investigated the beneficial utilization of cement kiln dust and copper tailing as undesirable wastes in industrial applications through underground mines’ cemented paste backfill (CPB). Sixty different mixtures were prepared with three types of CKD collected from various cement manufacturers and were accordingly used with a proportion of 5, 10, and 15% to partially replace ordinary Portland cement (OPC) and pozzolan Portland cement (PPC) binders, represented in hundreds of CPB samples. The hardened specimens were subjected to density, uniaxial compressive strength (UCS), and axial deformation measurements to evaluate the physical and mechanical properties at curing up to 90 days. Meanwhile, X-ray powder diffraction (XRD) was extensively applied to chemically investigate the hydration products of CPB-hardened mixtures. Moreover, we developed a UCS predictive model applying two techniques: multiple variables regression analysis and artificial neural network (ANN). The results showed that the tricalcium silicate (Alite) and dicalcium silicate (Belite) phases form C-S-H upon hydrations and provide high strength in the binary mixtures. Meanwhile, the CKD’s lime saturation factor (LSF) governed the strength value in the ternary mixtures that utilized copper tailings. That makes CKD practical in the CPB mixture when partially replacing the OPC and PPC binders, with a proportion of up to 15%. In addition, the ANN technique’s predictive model exhibited a significant positive correlation with excellent statistical parameters that achieved 0.995, 0.065, and 0.911 for R2, RMSE, and MAE, respectively.
Safety Culture among Transport Companies in Ethiopia: Are They Ready for Emerging Fleet Technologies?
Authors: Hagos Ehitayhu , Brijs Tom , Brijs Kris , Wets Geert , Teklu Bikila
Published: February 2023

The safety culture and safety climate of transport companies have a significant impact on fleet safety outcomes. Ample research shows that transport companies with a strong safety culture also show lower crash statistics. In spite of modern technologies that help with having a safer fleet, it is difficult to achieve a safer fleet without a proactive safety culture and climate. In Ethiopia, it is assumed that most transport companies have failed to create a distinguishable safety climate in their fleet safety administration and that their heavy vehicle drivers have a poor safety culture. These could be important factors contributing to a higher rate of road traffic crashes involving heavy vehicles. This study aims to assess the existing safety culture among a sample of transport companies in Ethiopia and identify suitable intervention methods to improve the safety culture. Moreover, the study sought to identify the readiness of the transport companies to apply modern technology in their fleets by examining their safety culture and safety climate. In total, 10 fleet managers and 174 heavy vehicle drivers participated in the fleet safety audit survey. A descriptive analysis and a detailed fleet safety audit score were calculated. Based on the scale scoring, ten companies score below best practices, one scores well below best practices, and only one company meets the criteria to be considered achieving best practices. The results from this study show that the safety culture and safety climate in most transport companies are quite limited. In addition, most transport companies implement similar safety measures, including inconsistent driver training and annual maintenance.
The Risk of Agricultural Land Abandonment as a Socioeconomic Challenge for the Development of Agriculture in the European Union
Authors: Pawlewicz Adam , Pawlewicz Katarzyna
Published: February 2023

In this article, the risk of agricultural farmland abandonment was assessed with the use of a synthetic measure of socioeconomic problems as challenges to the quality of life in rural areas in the European Union. To determine the direction and dynamics of changes in farmland abandonment in the EU countries, variables based on EUROSTAT and FADN data were analyzed using Hellwig’s method, and data for 2010, 2013, 2016, and 2019 were compared. The EUROSTAT methodology for the agri-environmental indicator “risk of land abandonment” was adapted for the needs of this study. Agricultural land is abandoned for many reasons, including conversion to other uses, but also abandonment of farming. The results of the analysis indicate that the risk of farmland abandonment was highest in countries with difficult farming conditions, such as Greece, Spain, Portugal, Romania, and Finland. In turn, Belgium, Denmark, Germany, and the Netherlands, i.e., the most economically developed countries, were most resilient to this risk. An analysis of the factors that contribute to farmland abandonment demonstrated that the likelihood of this risk decreases with a rise in agricultural investments, farm income, population density, prices of agricultural land, road quality, and density. A high proportion of ageing farm owners was the only factor that increased the risk of agricultural land abandonment.
Effect of UFC on the Microscopic Pore Structure of Cemented Soil in Humic Acid Environment
Authors: Cao Jing , Liu Fangyi , Huang Siyang , Liu Hong , Song Zhigang , Li Jianyun , Liu Guoshou
Published: February 2023

Peat soil is widely distributed in the Dianchi Lake area of Yunnan, and the effect of the cement deep-mixing method on peat soil foundation is mainly affected by humic acid (HA). In this paper, a composite cement curing agent is formed by adding different proportions of ultra-fine cement (UFC) to ordinary Portland cement (OPC) and used to cure the HA-containing cohesive soil. Mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and X-ray powder diffraction (XRD) are used to study the influence mechanism of UFC on the micropore structure of HA-containing cemented soil. The unconfined compressive strength test (UCS) is used to verify it. MIP, SEM, and XRD results show that UFC can significantly improve the microscopic pore structure of the samples. The hydration reaction rate of cement increases with the increase in the proportion of UFC, and the generated hydration products can fill the pores of the samples. The filling effect of hydration products on macropores is enhanced, and the pores change from fibrous filling to cemented filling. The enhanced cementation of the hydration products improved the loose and overhead structure inside the sample. Enhancing the cementation of hydration products improves the loose and overhead structure inside the sample and the integrity of cemented soil. UCS verified that the increase in the UFC proportion increases the HA-containing cemented soil strength. It achieves the purpose of reducing the amount of cement when curing peat soil foundations and supports reducing carbon emissions in practical projects.
The Agricultural–Ecological Benefit of Digital Inclusive Finance Development: Evidence from Straw Burning in China
Authors: Zhao Kai , Yu Bintong , Yang Xiaoting
Published: February 2023

This study provides theoretical and empirical evidence for the agricultural–ecological benefits of digital inclusive finance development. We analyzed the satellite resolution data of agricultural fires and an aggregate development index of digital inclusive finance at the county level in China from 2014 to 2016. The regression analysis demonstrated that digital inclusive finance development can inhibit straw burning, and that the inhibiting effect is more effective in agriculture-oriented counties located in the plain area of the eastern-central developed regions. Additionally, the influence mechanism, whereby digital inclusive finance development may reduce straw burning by improving agricultural mechanization, was also examined. The impact of digital inclusive finance on green agriculture production needs to be explored further since it is a revolutionary mode of financial development.
Why Do People Trust the Police? A Case Study of Thailand
Authors: Kulachai Waiphot , Cheurprakobkit Sutham
Published: February 2023

Trust in the police is considered vitally important in ensuring that citizens obey the law and cooperate with police officers. However, in recent times, the Royal Thai Police has been facing difficulties with the image of the organization, including lack of public trust resulting from the actions of some police officers. Therefore, this study investigated the level of trust in the police, as well as the factors that cause the public to trust the police. The samples used in this study were 971 residents in eastern Thailand. A questionnaire was used as a tool to collect data that were subjected to ordinary multiple regression analysis to test the hypotheses. The findings showed police effectiveness and fairness had a positive relationship with trust in the police. Age, corruption, and fear of crime had negative relationships with trust in the police. However, victimization had no association with trust in the police. Hence, the Royal Thai Police should place great importance on increasing the efficiency and effectiveness of police officers and treating people equally and fairly. In addition, corruption issues and the solving of crimes should be addressed to provide people with peace of mind and greater trust in the police.
Who Is in and Who Is out in Ocean Economies Development?
Authors: Cavallo Marianna , Bugeja Said Alicia , Pérez Agúndez José A.
Published: February 2023

This review engages with the ongoing blue economy debate to decipher old and emerging forms of economic, institutional, physical and social exclusions of local communities and vulnerable societies that may result from the development of ocean projects and policies across the globe. The results of this scientific and policy review show that, whereas for some traditional maritime activities such as fisheries, the drivers of exclusion are well studied and somehow addressed in policies, for other emerging sectors, such as ocean energies or deep-sea mining, there is a lack of understanding on how to recognise and prevent the different forms of exclusion. Exclusion is likely to occur when decisions are taken at the highest level of governance to achieve national or international targets of economic growth, food safety, clean energy or leisure, with little consideration of the effects on local economic, social and environmental contexts. On the other hand, when the principles of inclusiveness are given due consideration, they prove to be beneficial for the societies’ well-being, increasing the chance of long-term social acceptability. We conclude that, to embrace inclusiveness, both governments and industries have to (a) go beyond the capitalist commodification of nature and recognise benefits other than the economic ones, namely, emotional, cultural and spiritual; (b) promote initiatives that fulfil local needs in the first place and are adapted to local contexts; (c) cooperate with local institutions and stakeholders to promote the co-management of resources and adaptive development. Likewise, research institutions, funding organisations and governmental agencies have to engage in new ways to assess the effects of ocean development that go beyond the quantitative approach and seek to integrate qualitative information, traditional knowledge and local perceptions.
Geographical Education and Climate Change Perception in Secondary School: A Case Study in Southern Italy
Authors: De Pascale Francesco
Published: February 2023

This contribution proposes a study on how young people aged between 16 and 18 who live in Catanzaro, the capital of Calabria (southern Italy), perceive climate change. Through ethnographic interviews, based on the use of an open questionnaire and on participatory observation conducted in a secondary school, an attempt was made to reconstruct the degree of awareness of the students interviewed regarding the climate change underway, asking them to indicate which are the forms of knowledge involved and the possible causes of the phenomenon, as well as the critical issues and solutions currently available, both locally and globally, to limit any irreversible damage. The results show that students are aware of climate change and of the decisive human action in determining it, but show gaps in differentiating it from weather. Furthermore, they do not trust politics as regards mitigation and adaptation actions but are convinced that each individual can make his/her own contribution by changing consumption habits and lifestyles, reducing waste and focusing on greater respect for sustainability. Finally, greater awareness of climate change can also be acquired by enhancing the teaching of geography in schools and integrating climate change issues into courses, subjects or programs in the universities or educational institutes of developed and underdeveloped world institutions.
Case Study-Based Integrated Assessment of Former Waste Disposal Sites Transformed to Green Space in Terms of Ecosystem Services and Land Assets Recovery
Authors: Vincevica-Gaile Zane , Burlakovs Juris , Fonteina-Kazeka Maija , Wdowin Magdalena , Hanc Emil , Rudovica Vita , Krievans Maris , Grinfelde Inga , Siltumens Kristaps , Kriipsalu Mait , Aouissi Hani Amir , Gaagai Aissam , Zahoor Muhammad
Published: February 2023

Growing global production leads to continuing generation of waste, part of which still ends its life cycle in landfills and dumps. Despite the efforts of waste reuse and recycling and waste self-degradation, existing and old landfills and dumps remain a huge challenge for the future. The majority of landfills can be identified as non-sanitary and can be designated as existing or former dumps, meaning hills or fields of abandoned garbage and degraded inert waste masses without any or with little aftercare maintenance. In contrast, the term ‘landfill’ refers to legally organized waste disposal sites created in a controlled manner, according to modern environmentally responsible standards. The paper gives a case study-based integrated assessment of closed and revitalized waste disposal sites that have undergone a functional change from ‘lost territories’ to primarily green space beneficial for society and the urban environment, in terms of ecosystem services estimation based on the criteria evaluation approach and monetary assessment of land assets value recovery potential. The chosen four case studies (in the United States, Australia, Poland and Estonia) serve as successful examples of a sustainable degraded site revitalization gateway indicating opportunities for accelerating land value through the prism of ecosystem services estimations and spatial planning criteria. Beneficial value of land assets after site revitalization is assessed in monetary terms.
The Influence of Mall Management Dimensions on Perceived Experience and Patronage Intentions in an Emerging Economy
Authors: Mahmud Imroz , Ahmed Shamsad , Sobhani Farid Ahammad , Islam Md Aminul , Sahel Samira
Published: February 2023

A significant breakthrough in organised retail in an emerging economy such as Bangladesh, coupled with growing competition among mall managers, necessitates determination of the factors that contribute to a satisfactory shopping experience and long-term patronage intentions. Therefore, this study aimed to explore the factors influencing the overall experience of mall shoppers, which, in turn, shapes their patronage behaviour. For this purpose, 284 respondents were surveyed using the convenience sampling technique. Structural equation modelling was employed to test the hypothesised model. Among the three independent factors analysed, entertainment and accessibility wielded significant influence on shoppers’ experience, while tenant mix exerted a statistically insignificant influence. Altogether, these three independent variables, along with shoppers’ experience, accounted for 67% of the total variance in patronage. It was plausible to conclude that managing entertainment and accessibility can result in a more pleasant shopping experience. Being the first of its kind, this study investigated the combined impact of accessibility, tenant mix, and entertainment on the overall shopping experience that shapes patronage behaviour. This study’s findings can help comprehend the dynamics of customer management in the retail market of an emerging economy.
Exposure to Climatic Risks and Social Sustainability in Vietnam
Authors: Cuesta Jose , Cai Liang , Madrigal Lucia , Pecorari Natalia
Published: February 2023

This article constructed two spatial indices to better understand the interactions between social sustainability (an important but poorly defined concept) and exposure to climatic and environmental risks. The indices, and the Choropleth maps used to represent them, can be combined and operationalized across different country contexts to yield insights into how climate change and social vulnerabilities intersect and can be jointly addressed. The two indices were here applied to Vietnam, a country particularly exposed to climate change. While Vietnam is well-known for its vulnerability to changing temperatures and rising sea levels, there was huge variation within and between regions for these two risks. The analysis also found enormous spatial variation within the risks from precipitation, drought, deforestation, and air pollution. Social inclusion generally outperformed resilience and social cohesion, as well as empowerment in Vietnam. Our findings were robust for choices of indicators, weights, and aggregation specifications.
Topological Phase Transitions Driven by Sn Doping in (Mn1−xSnx)Bi2Te4
Authors: Tarasov Artem V. , Makarova Tatiana P. , Estyunin Dmitry A. , Eryzhenkov Alexander V. , Klimovskikh Ilya I. , Golyashov Vladimir A. , Kokh Konstantin A. , Tereshchenko Oleg E. , Shikin Alexander M.
Published: February 2023

The antiferromagnetic ordering that MnBi2Te4 shows makes it invariant with respect to the combination of the time-reversal and primitive-lattice translation symmetries, giving rise to its topologically nontrivial nature and a number of fundamental phenomena. At the same time, the possibility to control the electronic and magnetic properties of this system can provide new effective ways for its application in devices. One of the approaches to manipulate MnBi2Te4 properties is the partial substitution of magnetic atoms in the compound with atoms of non-magnetic elements, which inevitably affect the interplay of magnetism and band topology in the system. In this work, we have carried out theoretical modelling of changes in the electronic structure that occur as a result of increasing the concentration of Sn atoms at Mn positions in the (Mn1−xSnx)Bi2Te4 compound both using Korringa–Kohn–Rostoker (KKR) Green’s function method as well as the widespread approach of using supercells with impurity in DFT methods. The calculated band structures were also compared with those experimentally measured by angle-resolved photoelectron spectroscopy (ARPES) for samples with x values of 0, 0.19, 0.36, 0.52 and 0.86. We assume that the complex hybridization of Te-pz and Bi-pz orbitals with Sn and Mn ones leads to a non-linear dependence of band gap on Sn content in Mn positions, which is characterized by a plateau with a zero energy gap at some concentration values, suggesting possible topological phase transitions in the system.
Analytical Solutions for a New Form of the Generalized q-Deformed Sinh–Gordon Equation: ∂2u∂z∂ζ=eαu[sinhq(uγ)]p−δ
Authors: Ali Khalid K. , Alrebdi Haifa I. , Alsaif Norah A. M. , Abdel-Aty Abdel-Haleem , Eleuch Hichem
Published: February 2023

In this article, a new version of the generalized q-deformed Sinh–Gordon equation is presented, and analytical solutions are developed for specific parameter sets using those equations. There is a possibility that the new equation can be used to model physical systems that have broken symmetries and include also effects related to amplification or dissipation. In addition, we have include some illustrations that depict the varied patterns of soliton propagation.
First-Principles Calculation of Ligand Field Parameters for L-Edge Spectra of Transition Metal Sites of Arbitrary Symmetry
Authors: Krüger Peter
Published: February 2023

Recently we have proposed a simple method for obtaining the parameters of a ligand field multiplet model for L-edge spectra calculations from density functional theory. Here we generalize the method to systems where the metal site has arbitrary point symmetry. The ligand field-induced splitting of the metal d-level becomes a hermitian matrix with cross-terms between the different d-orbitals. The anisotropy of the covalency is fully taken into account and it rescales the electron–electron interaction and the oscillator strength in an orbital-dependent way. We apply the method to polarization-dependent V L-edge spectra of vanadium pentoxide and obtain very good agreement with the experiment.
Differentiating the State Evaluation Map from Matrices to Functions on Projective Space
Authors: Alhamzi Ghaliah , Beggs Edwin
Published: February 2023

The pure state evaluation map from Mn(C) to C(CPn−1) is a completely positive map of C*-algebras intertwining the Un symmetries on the two algebras. We show that it extends to a cochain map from the universal calculus on Mn(C) to the holomorphic ∂¯ calculus on CPn−1. The method uses connections on Hilbert C*-bimodules.
An Applied Type-3 Fuzzy Logic System: Practical Matlab Simulink and M-Files for Robotic, Control, and Modeling Applications
Authors: Huang Haiyan , Xu Hui , Chen Fenghua , Zhang Chunwei , Mohammadzadeh Ardashir
Published: February 2023

In this paper, the main concepts of interval type-2 (IT2), generalized type-2 (GT2), and interval type-3 (IT3) fuzzy logic systems (FLSs) are mathematically and graphically studied. In representation approaches of fuzzy sets (FSs), the main differences between IT2, GT2, and IT3 fuzzy sets were investigated. For the first time, the simple Matlab Simulink and M-files by illustrative examples and symmetrical FSs are presented for the practical use of IT3-FLSs. The computations were simplified for the practical use of IT3-FLSs. By the use of various examples, such as online identification, offline time series modeling, and a robotic control system, the design of IT3-FLSs is elaborated. The required derivative equations are also presented to design the adaptation laws for the rule parameters easily in other learning schemes. Some simulation examples show that the designed M-files and Simulink work well and result in a good performance.
Green Independent Innovation or Green Imitation Innovation? Supply Chain Decision-Making in the Operation Stage of Construction and Demolition Waste Recycling Public-Private Partnership Projects
Authors: Zhou Chuyue , He Jinrong , Li Yuejia , Chen Weihong , Zhang Yu , Zhang Hao , Xu Shiqi , Li Xingwei
Published: February 2023

Inefficiencies in the construction and demolition waste (CDW) recycling supply chain constrain green innovation in the construction industry. However, existing studies have not analyzed the innovation behavior of recyclers in CDW recycling public-private partnership (PPP) projects from the perspective of innovation diffusion theory. To reveal the mechanism of recyclers’ innovation behavior in CDW recycling PPP projects in which recyclers and remanufacturers jointly participate in the operation stage, this study uses a Stackelberg game to analyze the optimal innovation strategy choice and total profit of the CDW recycling supply chain among the two innovation paths of green independent innovation and green imitation innovation under the combined effects of technology spillover, consumer green sensitivity, and government price subsidies to consumers. The main conclusions are as follows. (1) Remanufacturers and recyclers can improve their own innovation level and profit through technology spillover. (2) The total profit of the CDW recycling supply chain changes dynamically with the level of spillover. (3) The government price subsidy to consumers does not always improve the total profit of the CDW recycling supply chain. (4) The effect of consumers’ green sensitivity on the total profit of the CDW recycling supply chain shows heterogeneity with the innovation path of recyclers and the level of technological spillover. This study not only enriches the theoretical study of the green supply chain but also provides a basis for decision-making for recyclers and governments in practice.
Performance Aspiration in Meritocratic Systems: Evidence of How Academic Titles Affect the Performance of Universities
Authors: Ju Chunhua , Ran Jiarui , Yu Liping
Published: February 2023

The study of academic title differences in universities helps to promote researchers’ enthusiasm and is critical to the efficiency of university scientific research. This study examines the impact of academic title differences on the research efficiency of universities and explores its mechanism. Based on the perspective of production types, the scientific and technological innovation achievements of universities are divided into academic output and economic output. By using the stochastic frontier model, this paper evaluates the influence of different academic titles on the academic and economic production efficiency of scientific research innovation in universities. The research results show that academic output efficiency increases over time, while the economic output efficiency decreases over time. Researchers with associate professor titles are more efficient in academic research production, and researchers with lecturer titles are more efficient in economic research production. Regional economy is positively correlated with the economic output of universities and negatively correlated with academic output. The production and development of academic and economic research in different regions are not coordinated.
Short-Term Effect of Moderate Level Air Pollution on Outpatient Visits for Multiple Clinic Departments: A Time-Series Analysis in Xi’an China
Authors: Wang Qingnan , Chen Zhuo , Huang Wei , Kou Bo , Li Jingwei
Published: February 2023

There is limited evidence concerning the association between air pollution and different outpatient visits in moderately polluted areas. This paper investigates the effects of moderate-level air pollution on outpatient visits associated with six categories of clinic department. We analyzed a total of 1,340,791 outpatient visits for the pediatric, respiratory, ear-nose-throat (ENT), cardiovascular, ophthalmology, and orthopedics departments from January 2016 to December 2018. A distributed lag nonlinear model was used to analyze the associations and was fitted and stratified by age and season (central heating season and nonheating season). We found SO2 had the largest effect on pediatrics visits (RR = 1.105 (95%CI: 1.090, 1.121)). Meanwhile, PM2.5 and SO2 had greater effects on ENT visits for people under 50 years old. The results showed a strong association between O3 and cardiovascular outpatient visits in the nonheating season (RR = 1.273, 95% CI: 1.189,1.358). The results showed every 10 μg/m3 increase in SO2 was associated with a lower number of respiratory outpatient visits. Significant different associations were observed in PM2.5, NO2, CO, and O3 on ophthalmology visits between the heating and nonheating seasons. Although no significant association has been found in existing studies, our findings showed PM2.5 and NO2 were significantly related to orthopedic outpatient visits for people under 60 (RR = 1.063 (95%CI: 1.032, 1.095), RR = 1.055 (95%CI: 1.011, 1.101)). This study also found that the effect-level concentrations of air pollutants for some clinic departments were lower than the national standards, which means that people should also pay more attention when the air quality is normal.
Comparative Analysis of Transcriptomic Changes including mRNA and microRNA Expression Induced by the Xenoestrogens Zearalenone and Bisphenol A in Human Ovarian Cells
Authors: Márton Éva , Varga Alexandra , Penyige András , Birkó Zsuzsanna , Balogh István , Nagy Bálint , Szilágyi Melinda
Published: February 2023

Xenoestrogens are natural or synthetic compounds that mimic the effect of endogenous estrogens and might cause cancer. We aimed to compare the global transcriptomic response to zearalenone (ZEA; mycotoxin) and bisphenol A (BPA; plastic additive) with the effect of physiological estradiol (E2) in the PEO1 human ovarian cell line by mRNA and microRNA sequencing. Estrogen exposure induced remarkable transcriptomic changes: 308, 288 and 63 genes were upregulated (log2FC > 1); 292, 260 and 45 genes were downregulated (log2FC < −1) in response to E2 (10 nM), ZEA (10 nM) and BPA (100 nM), respectively. Furthermore, the expression of 13, 11 and 10 miRNAs changed significantly (log2FC > 1, or log2FC < −1) after exposure to E2, ZEA and BPA, respectively. Functional enrichment analysis of the significantly differentially expressed genes and miRNAs revealed several pathways related to the regulation of cell proliferation and migration. The effect of E2 and ZEA was highly comparable: 407 genes were coregulated by these molecules. We could identify 83 genes that were regulated by all three treatments that might have a significant role in the estrogen response of ovarian cells. Furthermore, the downregulation of several miRNAs (miR-501-5p, let-7a-2-3p, miR-26a-2-3p, miR-197-5p and miR-582-3p) was confirmed by qPCR, which might support the proliferative effect of estrogens in ovarian cells.
β-N-Methylamino-L-Alanine (BMAA) Modulates the Sympathetic Regulation and Homeostasis of Polyamines
Authors: Shkodrova Milena , Mishonova Milena , Chichova Mariela , Sazdova Iliyana , Ilieva Bilyana , Doncheva-Stoimenova Dilyana , Raikova Neli , Keremidarska-Markova Milena , Gagov Hristo
Published: February 2023

The neurotoxin β-N-methylamino-L-alanine (BMAA) is a non-proteinogenic amino acid produced by cyanobacteria. Non-neuronal toxicity of BMAA is poorly studied with a reported increase in reactive oxygen species and a decrease in the antioxidant capacity of liver, kidney, and colorectal adenocarcinoma cells. The aim of this research is to study the toxicity of BMAA (0.1–1 mM) on mitochondria and submitochondrial particles with ATPase activity, on the semicarbazide-sensitive amino oxidases (SSAOs) activity of rat liver, and on an in vitro model containing functionally active excitable tissues—regularly contracting heart muscle preparation with a preserved autonomic innervation. For the first time the BMAA-dependent inhibition of SSAO activity, the elimination of the positive inotropic effect of adrenergic innervation, and the direct and reversible inhibition of adrenaline signaling in ventricular myocytes with 1 mM BMAA were observed. Additionally, it is confirmed that 1 mM BMAA can activate mitochondrial ATPase indirectly. It is concluded that a higher dose of BMAA may influence multiple physiological and pathological processes as it slows down the degradation of biogenic amines, downregulates the sympathetic neuromediation, and embarrasses the cell signaling of adrenergic receptors.
COVID-19 Vaccination Intention in Patients with Autoimmune Diseases in Indonesia: An Application of the Integrated Behavioural Model
Authors: Widhani Alvina , Pelupessy Dicky C. , Siddiq Tommy Hariman , Koesnoe Sukamto , Maria Suzy , Yunihastuti Evy , Awanis Ghina Shabrina , Karjadi Teguh Harjono , Hasibuan Anshari Saifuddin , Sukmana Nanang , Hakam Mulki , Putri Kartika Qonita , Taufik Insy Nafisah , Widiyanti Delina , Rengganis Iris , Djauzi Samsuridjal
Published: February 2023

Vaccine hesitancy can be a challenge for those with autoimmune diseases. This study investigated the acceptance of COVID-19 vaccination by patients with autoimmune diseases in Indonesia using the integrated behavioral model (IBM). This cross-sectional study was conducted from December 2021 to February 2022. A total of 404 patients with autoimmune diseases completed the survey. The majority of respondents (57.9%) said they intended to get vaccinated against COVID-19. The IBM model with added demographic variables explained 54.1% of the variance of vaccination intention (R2 = 0.541). Self-efficacy, perceived norms, experiential attitude, and instrumental attitude are significantly correlated with vaccination intention in components of health behavior theories. Self-efficacy is the most critical factor influencing vaccination intention in patients with autoimmune diseases (F(2, 401) = 96.9, p < 0.001, R2 = 0.326). In the multivariate analysis, vaccine intention was found to be positively associated with patients’ occupation as health-care workers (β = 0.105). Meanwhile, having a personal history of contracting COVID-19 and having co-morbidities other than autoimmune diseases were negatively correlated to the willingness to be vaccinated against COVID-19. This study confirms the viability of the IBM model for predicting the COVID-19 vaccination intention of patients with autoimmune diseases. It is essential to provide patients with autoimmune diseases with information that is clear and supported by evidence-based medicine.
Recurrence Rate of Pulmonary Tuberculosis in Patients Treated with the Standard 6-Month Regimen: Findings and Implications from a Prospective Observational Multicenter Study
Authors: Anaam Mohammed Saif , Alrasheedy Alian A.
Published: February 2023

Tuberculosis (TB) recurrence following successful treatment is a significant challenge in TB control programs. However, the rate of TB recurrence varies among studies. It depends on several factors, including the country/region where the investigation occurs, the study design, sample characteristics, and the anti-TB regimen used. In Yemen, a few previous studies examined the rate of TB recurrence and reported high recurrence rates, with a 5-year recurrence rate of approximately 9.5%. However, they were conducted before 2010 using the previous anti-TB regimen which was phased out and replaced with the World Health Organization’s (WHO) standard 6-month TB regimen. Consequently, this study aimed to examine the rate of TB recurrence after the implementation of the WHO standard 6-month regimen in Yemen. A prospective observational study was conducted with patients diagnosed with drug-susceptible pulmonary TB. The patients were recruited from five health centers with TB units in five governorates from January to December 2011. All the patients were followed up for five years after treatment completion. A total of 439 patients who completed the anti-TB regimen met the inclusion criteria and were included in the study. During the 5-year follow-up period, 8 patients (1.8%) died, and 13 patients (2.96%) were lost to follow-up, resulting in a final cohort of 418 patients. Of the cohort, 50.5% (n = 211) were male, while 49.5% (n = 207) were female patients. Of the patients, 129 patients (30.9%) were illiterate, 56 (13.4%) had cavitary pulmonary disease, and 6.2% (n = 26) had diabetes. The overall 5-year rate of TB recurrence in this study for the patients receiving the standard 6-month regimen was 2.9% (12/418). Moreover, almost half of the recurrent cases (41.7%; n = 5) were seen during the first year of the follow-up period. Some patient groups with risk factors recorded a higher recurrence rate, including patients with diabetes (15.4%), non-compliant patients (14.3%), pre-treatment lung cavitation patients (8.9%), illiterate patients (7.8%), and underweight patients (5.1%). In conclusion, the overall TB recurrence rate with the standard 6-month regimen was lower than that with the previous TB regimens. However, more efforts are needed to decrease TB recurrence rates further and achieve a durable cure for TB. In addition, healthcare professionals and TB control programs should consider potential risk factors of recurrence and address them to provide optimal care.
Blue-Winged Teals in Guatemala and Their Potential Role in the Ecology of H14 Subtype Influenza a Viruses
Authors: Ortiz Lucia , Geiger Ginger , Ferreri Lucas , Moran David , Mendez Dione , Gonzalez-Reiche Ana Silvia , Alvarez Danilo , Motta Mayra , Escobar Francisco , Rajao Daniela , Cordon-Rosales Celia , Nelson Martha I. , Perez Daniel R.
Published: February 2023

Wild aquatic birds are considered the natural hosts of 16 HA (H1–H16) and 9 NA (N1–N9) subtypes of influenza A viruses (FLUAV) found in different combinations. H14 FLUAVs are rarely detected in nature. Since 2011, H14 FLUAVs have been consistently detected in Guatemala, leading to the largest collection of this subtype from a single country. All H14 FLUAVs in Guatemala were detected from blue-winged teal samples. In this report, 17 new full-length H14 FLUAV genome sequences detected from 2014 until 2019 were analyzed and compared to all published H14 sequences, including Guatemala, North America, and Eurasia. The H14 FLUAVs identified in Guatemala were mostly associated with the N3 subtype (n = 25), whereas the rest were paired with either N4 (n = 7), N5 (n = 4), N6 (n = 1), and two mixed infections (N3/N5 n = 2, and N2/N3 n = 1). H14 FLUAVs in Guatemala belong to a distinct H14 lineage in the Americas that is evolving independently from the Eurasian H14 lineage. Of note, the ORF of the H14 HA segments showed three distinct motifs at the cleavage site, two of these containing arginine instead of lysine in the first and fourth positions, not previously described in other countries. The effects of these mutations on virus replication, virulence, and/or transmission remain unknown and warrant further studies.
Hepatitis E Virus (HEV) in Makkah, Saudi Arabia: A Population-Based Seroprevalence Study
Authors: El-Daly Mai M. , Al-Raddadi Rajaa , Alharbi Amany , Azhar Abdulrahman E. , Khallaf Amjed M. , Hassan Ahmed M. , Alwafi Osama M. , Shabouni Omaima I. , Alandijany Thamir A. , Li Tian-Cheng , El-Kafrawy Sherif A. , Zumla Alimuddin , Azhar Esam I.
Published: February 2023

Background: The Hepatitis E virus (HEV) is a common cause of viral hepatitis worldwide. Little is known about the seroprevalence of HEV in the general population of Saudi Arabia. Methods: A community-based cross-sectional HEV seroprevalence study was conducted in Makkah, Saudi Arabia. Anti-HEV IgG antibodies were detected in sera using an in-house ELISA. The frequency of HEV sageerology and its correlation with demographic, and environmental factors were evaluated. Results: Enrollment consisted of 1329 individuals, ages ranged from 8 to 88 years, the mean age was 30.17 years, the median age was 28yrs, and the male: female ratio was 1.15. The overall seroprevalence was 23.8% (316/1329). Males had significantly higher seroprevalence than females (66.1 vs. 33.9%; p < 0.001). Seroprevalence had significant correlations with age, occupation, and lack of regular water supply and housing conditions. Conclusions: This is the first HEV community-based seroprevalence study from Saudi Arabia. Results show that the HEV is endemic in Makkah and affects all age groups and occupations. HEV affects more males than females and those living in crowded accommodations without a regular supply of water. Further studies are required across all regions of Saudi Arabia to determine the country’s seroprevalence of active or past infection using tests for HEV IgG, HEV IgM antibodies and/or HEV RNA and underlying determinants of transmission.