Miracle-dz/UniFAR-FTUs huggingface dataset:
Determinants of Patient Satisfaction in The United Arab Emirates Health Care Industry

Background: The United Arab Emirates is aiming to provide 'world-class healthcare' to its citizens. This study aims to determine the association between overall satisfaction and various aspects of health care services in the United Arab Emirates on a country level. Methods: The data was collected from 5,855 respondents on the affordability, quality, accessibility, and responsiveness dimensions of health care. Besides frequency tables and descriptive statistics, statistical methods, such as Principal Component Analysis and Multiple Regression, were used to reduce and model the association between dependent (overall satisfaction) and independent (affordability, quality, accessibility, and responsiveness) variables. Results: The findings indicated higher satisfaction levels with quality and accessibility and lower satisfaction levels with affordability and responsiveness. Recommendations are provided to address the latter two factors. Conclusion: The study identifies issues in health care service provision in the United Arab Emirates and offers recommendations about enhancing affordability and responsiveness.
A Facile Method for Preparing a Superhydrophobic Block with Rapid Reparability

Superhydrophobic surfaces are fragile and are prone to failure in harsh outdoor environments. The preparation of robust superhydrophobic surfaces with stable performance and excellent properties can extend their application. In this paper, we report a simple and cost-effective method to prepare a superhydrophobic block using superhydrophobic zinc oxide powder and die pressing. The prepared sample has a contact angle of 163° and a sliding angle of 7°. Tests show that the superhydrophobic block can resist the impact of water flow, maintain its superhydrophobicity after friction or knife scraping, and quickly repair the destroyed surface by sandpaper abrasion. The sample exhibited excellent self-cleaning effect, robust mechanical property, and rapid repairability. This preparation method is also environmental-friendly and easy to operate. It will have a wide application prospect in many important fields.
Dynamic shear strength evaluation of CFRP using off-axis tension test: theoretical and experimental studies

Abstract Shear strength evaluation in composites is still a problem that has not been fully solved. Dynamic shear strength evaluation is even more complicated. In present work, failure theories are used to determine the range of fiber orientations in which the evaluation of shear strength is feasible. The symmetrical laminate is used to eliminate coupled shear strain to improve measurement accuracy. Three different fiber orientation laminates are chosen for quasi-static tension test. And a combination of experimental and numerical method is carried out for high strain rate tests. The results show that the fiber orientation of ± 15° is suitable for evaluating the dynamic shear strength of CFRP (Carbon Fiber Reinforced Polymer). This study is of great significance to dynamic shear strength evaluation method of continuous fiber reinforced composites considering strain rate effect.
The media paradox: influence on human shark perceptions and potential conservation impacts

Sharks, due to some of their characteristics such as prominent teeth and size, cause fear in many people. This feeling can be evidenced due to encounters with these animals or sustained by media information. Currently, negative information on these animals, present in movies and the news, for example, has contributed to a worldwide feeling of "fear" or "anger" towards sharks in the general public. On the other hand, efforts to better understand these animals have increased. In addition to films and documentaries, many scientific and environmental education groups have attempted to improve or alleviate, public perception concerning this significant fear and promote shark conservation. In this context, we analyzed the perceptions of 354 people living in Rio de Janeiro, a coastal city in southeastern Brazil, by applying a structured online questionnaire about sharks. The findings reported herein indicate direct media influence on respondent perceptions, according to the “good” or “bad” image that media vehicles pass on concerning these animals, and that, despite an established fear of sharks, public support for their conservation is maintained. The factor analysis indicated a relationship between older people and more fear, and less fear among people aged 20-40 years. We believe that the lesser fear in the latter is related to the influence of the current media in this age group, such as documentaries and social networks, while older respondents lived in a period with less environmental information and became more susceptible to shark negative films and media, in which the fear persists today.
Full-Order Sliding Mode Observer Based on Synchronous Frequency Tracking Filter for High-Speed Interior PMSM Sensorless Drives

In the research of the high-speed sensorless control strategy of an interior permanent-magnet synchronous motor (IPMSM), considering the harmonic influence of inverter nonlinearity on traditional sliding mode observer method, a full-order sliding mode observer (SMO) method based on synchronous frequency tracking filtering is proposed. This method avoids the phase delay defects caused by the use of filters in traditional second-order SMO. Then, the observed extended electromotive force (EMF) signal is filtered using a synchronous frequency tracking (SFT) function. It tracks the changing stator current and filters out harmonics that are not part of the tracking signal to achieve static tracking of the stator current. Then, the rotor speed can be estimated by a Luenberger-based observer. Experimental results verify the effectiveness and feasibility of the proposed method.
Comparative study of degradation between the carbon black back coat layer and magnetic layer in magnetic audio tapes using attenuated total reflectance Fourier transform infrared spectroscopy and machine learning techniques

Most magnetic audio tapes in the industry were initially made with only two layers, the base film with polyethylene terephthalate (PET) and the binder layer with polyester polyurethane (PEU). The binder layer seems to undergo degradation from hydrolysis, causing the condition “sticky shed syndrome (SSS). ” Hydrolysis is a reversible reaction where atmospheric moisture reacts with weak ester bonds to form degradation products, alcohols, and carboxylic acids, which produce sticky materials, hindering the playability of tapes. Later, another layer called “back coat” was introduced to magnetic audio tapes. This layer consists of carbon black embedded in PEU or polyether polyurethane. Carbon black particles in this layer absorb water, facilitate high‐speed tape winding, and remove static electricity charges. However, due to the ability to absorb water, hydrolysis can occur in the back coat layer as well. For this reason, there is a study claiming that the back coat is responsible for the degradation of magnetic audio tapes, and by removing it, SSS can be overcome. To test the validity of the above claim, this study uses attenuated total reflectance Fourier transform infrared spectroscopy (ATR FT‐IR) with multivariate statistics to determine the degradation of the back coat layer and compare the results with the magnetic layer of the same tape identities. Results obtained show poor predictability in the back coat test set when compared with the results collected from the magnetic side, which indicates that to determine the playability status of this specific magnetic audio tape collection, the preferred side to obtain spectra is the magnetic layer.
Physically Controlled Radical Polymerization of Vaporized Vinyl Monomers on Surfaces. Synthesis of Block Copolymers of Methyl Methacrylate and Styrene with a Conventional Free Radical Initiator

Physically controlled radical polymerization of vinyl monomers with conventional free radical initiators was achieved in the presence of monomer vapors on solid substrate surfaces. The polymerization of methyl methacrylate (MMA) and styrene (St) by 2,2‘-azobis(isobutyronitrile) (AIBN) on substrate surfaces resulted in the deposition of high molecular weight polymers, forming a rough surface morphology in such forms of aggregated particles. The proportional relationship between the number-average molecular weight and polymer yield was successfully obtained, and the consecutive copolymerization of MMA and St produced a block copolymer, poly(MMA-b-St). These results support the living nature of the free radical polymerization on surfaces in the presence of monomer vapors. The SEM observations of the deposits revealed that the polymerization proceeded with a continuous polymer deposition taking place at points where the active species were immobilized, reflecting a predesigned pattern on the substrate surface.
Plant Growth Retardants, Plant Nutrients, and Cotton Production

Soil fertility and crop management are the two most important factors of modern agricultural activity. Managing the balance of vegetative and reproductive growth is the essence of managing a cotton crop. It is well known from numerous fertilizer experiments that the yield of agricultural crops has been strongly dependent on the supply of mineral nutrients, which have been used in crop cultivation to exploit the full genetic potential of the plant. Supplying optimal quantities of mineral nutrients to growing crop plants is one way to improve crop yields. In recent years, several approaches have been tried to break this yield plateau, and among them is application of plant growth regulators (PGRs). In maximizing the quantity and quality of a crop it is necessary to identify the constraints that may affect it and to devise methods of overcoming them through the use of inputs or changes in management practices.
Stable Entire-Length Measurement of Fiber Strain Distribution by Brillouin Optical Correlation-Domain Reflectometry with Polarization Scrambling and Noise-Floor Compensation

We performed a stable high-speed entire-length measurement of strain distribution by suppressing the signal fluctuations automatically using polarization scrambling. Strain distribution along the entire length of a 100-m fiber was successfully measured with 40-cm spatial resolution and 19-Hz sampling rate. We also demonstrated a signal-to-noise ratio improvement by compensating the noise-floor of the electrical spectrum analyzer.
Regulation of mucosal lectins in the oyster Crassostrea virginica in response to food availability and environmental factors

Lectins are a large and diverse group of sugar-binding proteins involved in nonself recognition and cell-to-cell interactions. Suspension-feeding bivalves, such as the oyster Crassostrea virginica, are capable of using these molecules to bind cell surface carbohydrates of food particles, allowing particle capture and selection. The aim of this project was to assess whether the expression of mucosal lectins in C. virginica is constant or changes with the season, and to determine whether lectin expression is linked to environmental parameters and/or internal biological factors (gametogenesis). A total of 130 oysters were placed in submerged cages at a tidal estuary and monitored for changes in lectin gene expression over a 1-year period. In parallel, environmental parameters prevailing at the field site, including seawater physicochemical characteristics (temperature, salinity and dissolved oxygen), particulate organic matter and chlorophyll contents, were also monitored. Throughout the study, oysters were dissected and the gills were collected and used for the assessment of the expression of three different lectin genes (CvML, CvML3914 and CvML3912). Remaining tissues were processed for histology and the classification of the gonad development stage. Results showed that when food is abundant, such as during the spring bloom, lectin gene expressions are low, and inversely lectin levels increase with lower food levels. These findings suggest that oysters increase lectin expression to enhance the capture and ingestion of scarce food, while during spring, enough food is already being ingested and lectins are not needed. Furthermore, results showed that as the energy demands of oysters increase (gonad maturation), lectin gene expressions also increase to enhance selective ingestion of nutritious food particles. This study, therefore, demonstrates the seasonality of lectin gene expression in C. virginica, and suggests that lectin regulation is related to the reproduction process and abundance of high-quality food.
Simultaneous induction of anthocyanin and peroxidase by sucrose in hypocotyls and roots of Chinese red radish seedlings

Anthocyanin and peroxidase (POD) are important active compounds in Chinese red radish (Raphanus sativus L.). The effects of exogenous sucrose, mixture of fructose and glucose (F/G 1:1), and mannose on anthocyanin accumulation and POD activity were investigated in hypocotyls and roots of red radish seedlings. Sucrose was most effective in inducing anthocyanin accumulation and POD activity in both organs, followed by F/G; mannose caused only a little increase of anthocyanin content and POD activity in hypocotyls, but a decrease in roots. The distribution of anthocyanin accumulation was different between hypocotyls and roots in the presence or absence of sucrose. Anthocyanin was clearly induced in root tips and cortex under exogenous sucrose. Accumulation of anthocyanin was closely correlated to the increase of endogenous sucrose content rather than glucose or fructose content. Sucrose significantly induced the expressions of late anthocyanin biosynthetic genes by up-regulating Raphanus sativus myeloblastosis 1 and Raphanus sativus transparent testa 8 in both organs. The POD activity significantly increased following the remarkable accumulation of anthocyanin in hypocotyls under exogenous sucrose, which may be partially required for anthocyanin oxidation. In roots, the high POD activity might lead to a low anthocyanin content by degrading anthocyanin and diverting the metabolic flux to lignin synthesis. Additional key words: fructose, glucose, mannose, Raphanus sativus. Submitted 5 June 2020, last revision 22 October 2020, accepted 27 October 2020. Abbreviations: ANS anthocyanidin synthase; bHLH basic helix-loop-helix; C4H cinnamate 4-hydroxylase; CHI chalcone isomerase; CHS chalcone synthase; 4CL 4-coumarate-CoA ligase; DFR dihydroflavonol 4-reductase; F/G fructose and glucose; F3H flavanone 3-hydroxylase; LBGs late biosynthetic genes; Man mannose; MYB – myeloblastosis; PAL – phenylalanine ammonia-lyase; POD peroxidase; Suc sucrose; TT8 transparent testa 8; UFGT UDP-glucose:flavonoid 3-O-glucosyltransferase; WDR WD40 repeat DNA protein. Acknowledgements: This work was supported by National Natural Science Foundation of China (NSFC, 31771703 and 31601241). * Corresponding author; e-mail: li_yongfang@hotmail.com This is an open access article distributed under the terms of the Creative Commons BY-NC-ND Licence
Microgrid System Design Based On Model Based Systems Engineering And Goal-Oriented Requirements Engineering

Microgrids appear as a practical, clean and reliable solution to meet the demand of populations that, for various reasons, do not have access to electricity. The complexity of microgrid systems, requires considerable engineering effort in the design process. To design this type of complex systems, new approaches, methods, concepts and engineering tools are needed. Where, the requirements analysis has a preponderant role to better characterize, understand and specify the application domain and the problem that the microgrids must solve. This work proposes the introduction of a formal analysis of requirements in the life cycle of microgrid systems, using IEC 61850 as a reference architecture. The requirements would be represented in an Object Oriented Requirements Engineering (GORE) approach, using specifically visual diagrams based on the KAOS (Keep All Objectives Satisfied) method, where the operation and control of the network will be formally represented. The requirements analysis is presented using a combined representation that uses the GORE and Petri Nets methodology for dynamic modeling and formal verification. A case study for small communities in the Amazon rainforest is used as a case study for the proposed method. Keywords— System Design, Formal Modeling, GORE methodology, Petri Nets, microgrid Resumo— As microgrid surgem como uma solução prática, limpa e confiável para atender a demanda das populações que, por diversos motivos, não têm acesso à energia elétrica. A complexidade de sistemas microgrid, exigem um esforço considerável de engenharia no processo de design. Para realizar o Design deste tipo de sistemas complexos, são necessárias novas abordagens, métodos, conceitos e ferramentas de engenharia. Onde, a análise de requisitos tem um papel preponderante para melhor caracterizar, entender e especificar o domı́nio de aplicação e o problema que as microgrid devem resolver. Este trabalho propõe a introdução de uma análise formal de requisitos no ciclo de vida de sistemas microgrid, utilizando a IEC 61850 como arquitetura de referência. Os requisitos seriam representados em uma abordagem de Engenharia de Requisitos Orientada a Objetivos (GORE), usando especificamente diagramas visuais baseados no método KAOS (Keep All Objectives Satisfied), onde a operação e o controle da rede serão formalmente representados. A análise de requisitos é apresentada usando uma representação combinada que utiliza a metodologia GORE e Redes de Petri para a modelagem dinâmica e verificação formal. Um estudo de caso para pequenas comunidades na floresta Amazônia é usado como um estudo de caso para o método proposto. Palavras-chave— Projeto de sistemas, modelagem formal, metodologia GORE, redes de Petri, microgrid
Wind resource and energy potential assessment of the Sujawal site, Sindh Pakistan

PurposeThe objective of this paper to assess the wind energy potential of the Sujawal site for minimizing the dependence on fossil fuels.Design/methodology/approachThe site-specific wind shear coefficient and the turbulence model were investigated. The two-parameter, k and c, Weibull distribution function was used to analyze the wind speed of the Sujawal site. The standard deviation of the site was also assessed for a period of a year. Also, the coefficient of variation was carried out to determine the difference at each height. The wind power and energy densities were assessed for a period of a year. The economic assessment of energy/kWh was investigated for selection of appropriate wind turbine.FindingsThe mean wind shear of the Sujawal site was found to be 0.274. The mean wind speed was found to be 7.458, 6.911, 6.438 and 5.347 at 80, 60, 40 and 20 m, respectively, above the ground level (AGL). The mean values of k parameter were observed to be 2.302, 2.767, 3.026 and 3.105 at 20, 40, 60 and 80 m, respectively, for a period of a year. The Weibull c m/s parameter values were found to be 8.415, 7.797, 7.265 and 6.084 m/s at 80, 60, 40 and 20 m, respectively. The mean values of standard deviation were found to be 0.765, 0.737, 0.681 and 0.650 at 20, 40, 60, and 80 m, respectively. The mean wind power density (W/m2) was found to be 287.33, 357.16, 405.16 and 659.58 for 20, 40, 60 and 80 m, respectively. The economic assessment showed that wind turbine 7 had the minimum cost/kWh US$ 0.0298. Originality/valueThe Sujawal site is suitable for installing the utility wind turbines for energy generation at the lowest cost; hence, a sustainable solution.
Mixing and controlling the pH of citrate and phosphate with website

In this study built an instrument capable of mixing and controlling chemical pH of citrate solution and phosphate solution as buffer solution. The problem often experienced in mixing chemicals is a matter of safety and the accuracy of the concentration of the mixing of the substance. The function of this instrument is to mix and control the pH of the citrate and phosphate solution. It is hoped that in the presence of this instrument, the manufacture of citrate solutions and phosphate solutions can be carried out electronically which does not involve manual calculations to obtain the desired pH of the solution, and is relatively safe from direct contact with chemicals. This instrument is built using a pH sensor as the sensing pH value of the solution to be made. And as a controller used microcontroller. Results of pH control other than can be stored in the database, can also be transmitted to the internet (website) using a wifi interface device. Mixers and pH controls of citrate and phosphate have been realized and resulted in good pH control.
A Study of User Activity Patterns and the Effect of Venue Types on City Dynamics Using Location-Based Social Network Data

The main purpose of this research is to study the effect of various types of venues on the density distribution of residents and model check-in data from a Location-Based Social Network for the city of Shanghai, China by using combination of multiple temporal, spatial and visualization techniques by classifying users’ check-ins into different venue categories. This article investigates the use of Weibo for big data analysis and its efficiency in various categories instead of manually collected datasets, by exploring the relation between time, frequency, place and category of check-in based on location characteristics and their contributions. The data used in this research was acquired from a famous Chinese microblogs called Weibo, which was preprocessed to get the most significant and relevant attributes for the current study and transformed into Geographical Information Systems format, analyzed and, finally, presented with the help of graphs, tables and heat maps. The Kernel Density Estimation was used for spatial analysis. The venue categorization was based on nature of the physical locations within the city by comparing the name of venue extracted from Weibo dataset with the function such as education for schools or shopping for malls and so on. The results of usage patterns from hours to days, venue categories and frequency distribution into these categories as well as the density of check-in within the Shanghai and contribution of each venue category in its diversity are thoroughly demonstrated, uncovering interesting spatio-temporal patterns including frequency and density of users from different venues at different time intervals, and significance of using geo-data from Weibo to study human behavior in variety of studies like education, tourism and city dynamics based on location-based social networks. Our findings uncover various aspects of activity patterns in human behavior, the significance of venue classes and its effects in Shanghai, which can be applied in pattern analysis, recommendation systems and other interactive applications for these classes.
Chronic pain and weight regain in a lifestyle modification trial

Obesity and chronic pain often co‐occur and exert bidirectional influences on one another. How patients with obesity and chronic pain respond to weight loss treatments, however, remains unclear. This study evaluated body weight, physical activity, and diet outcomes in participants with and without chronic pain in a 2‐year behavioral weight loss trial.