Miracle-dz/UniFAR-FTUs huggingface dataset:
Crisis communication: a comparative study of communication patterns across crisis events in social media

Valuable and timely information about crisis situations such as natural disasters, can be rapidly obtained from user-generated content in social media. This has created an emergent research field that has focused mostly on the problem of filtering and classifying potentially relevant messages during emergency situations. However, we believe important insight can be gained from studying online communications during disasters at a more comprehensive level. In this sense, a higher-level analysis could allow us to understand if there are collective patterns associated to certain characteristics of events. Following this motivation, we present a novel comparative analysis of 41 real-world crisis events. This analysis is based on textual and linguistic features of social media messages shared during these crises. For our comparison we considered hazard categories (i.e., human-induced and natural crises) as well as subcategories (i.e., intentional, accidental and so forth). Among other things, our results show that using only a small set of textual features, we can differentiate among types of events with 75% accuracy. Indicating that there are clear patterns in how people react to different extreme situations, depending on, for example, whether the event was triggered by natural causes or by human action. These findings have implications from a crisis response perspective, as they will allow experts to foresee patterns in emerging situations, even if there is no prior experience with an event of such characteristics.
As a Newly-Discovered Component in Tumor Microenvironment RUFY4 Participates in Regulation of T cell via Cytokine-Interaction and Predicts Prognosis and Immunotherapy Responsiveness of Clear Cell Renal Carcinoma Patients

Background: clear cell renal cell carcinoma (ccRCC) is one of the most lethal kinds of malignancies in urinary system and the existing immunotherapy have not achieved satisfactory outcomes. Therefore, this study aims to establish a brand-new gene signature for immune-infiltration and clinical outcome (overall survival and immunotherapy responsiveness) of patients with ccRCC. Methods: Based on RNA sequencing data and clinical information in the Cancer Genome Atlas Project (TCGA) database, we investigated proportions of immune cells in 611 samples by an online tool CIBERSORTx. Multivariate survival analysis was used to determine crucial survival-associated immune cells and immune-infiltration-related genes (IIRGs). Next ROC analysis was carried on to evaluate the ability of IIRGs to distinguish patients and functional enrichment analysis were implemented to explore potential interaction network between immune cells and IIRGs. Results: T cells follicular helper (TFHs) and T cells regulatory (Tregs) were highly infiltrated in the tumor microenvironment and their abundance ratios were independent prognostic factors for overall survival. Among IIRGs of TFHs and TREGs, RUFY4 was found to be highly activated in tumor microenvironment and its co-expression network was enriched in regulation of T cells via cytokine-cytokine receptor interactions.Conclusion: These two cells and RUFY4, considered prognostic biomarkers and immunotherapeutic predictors of ccRCC patients, might also simultaneously affect the regulatory network in tumor microenvironment (TME) through cytokine interactions.
Improving the photo-oxidative capability of BiOBr via crystal facet engineering

Bismuth oxybromide (BiOBr) has emerged as a potential visible-light-driven photocatalyst with relatively high photocatalytic activity although modifications are still necessary to further promote its photocatalytic performance. Here, a facile chemical precipitation process was used to synthesize tetragonal BiOBr with a predominance of either {001} or {010} exposed crystal facets. Scanning electron microscopy revealed that BiOBr particles dominated by the {010} facet possessed a large plate-like morphology while the {001}-dominated BiOBr comprised smaller, more irregular particles. Ultraviolet-visible diffuse reflectance spectra and Mott–Schottky analysis highlighted a difference in electronic band structure of the two materials; BiOBr-010 possessed a valence band potential and a band-gap of 2.71 and 2.95 eV versus normal hydrogen electrode (NHE), respectively, while BOBr-001 exhibited values of 2.63 and 3.15 eV versus NHE, respectively. BiOBr-010 displayed a better photo-oxidative capability than BOBr-001 for both water oxidation and formic acid degradation (aqueous phase). The higher photo-oxidative capability of BiOBr-010 was attributed to the suppression of photo-induced electron/hole recombination. Additionally, the improved charge transfer efficiency and reduced charge transfer resistance in BiOBr-010 was revealed to be beneficial for enhancing photoelectrochemical (PEC) performance. The findings account for the better photo-oxidative activity and higher current density of BiOBr-010 despite its smaller specific surface area and illustrate the use of crystal facet engineering to promote photocatalytic performance.
Estimation of Biological Toxicity by Copper oxychloride on Pisum sativum L. and Vigna radiata L.

Background: This research work describes about toxicity estimation of commonly used fungicide copper oxychloride using Pisum sativum L. and Vigna radiata L. as a bioindicator. Methods: The seeds of P. sativum and V. radiata were treated with different concentrations of fungicide. Biological toxicity measured by seed germination percentage, R/P ratio, total leaf chlorophyll, total leaf proline, total seed protein, mitotic index, abnormality index and mitotic inhibition. Result: Linear regression analysis showed that seed germination percentage, total seed protein, abnormality index and mitotic inhibition show positive correlation with increasing concentration of fungicide copper oxychloride. The R/P ratio of 4th and 8th days, mitotic index, total leaf chlorophyll and leaf proline have negative correlation along increasing concentration of fungicide. However total leaf proline of V. radiata at 2% concentration of fungicide is abruptly higher than control and other concentrations. The application of copper oxychloride at lower concentration can be used as a safe fungicide.
MiR-10b alleviates high glucose-induced human retinal endothelial cell injury by regulating TIAM1 signaling

Purpose: To investigate the effects of microRNA (miR)-10b on high glucose (HG)-induced human retinal endothelial cell (HREC) injury and the mechanisms involved.Methods: Levels of miR-10b were measured in HRECs using quantitative reverse transcriptasepolymerase chain reaction (qRT-PCR) after the addition of glucose (5.5 and 30 mM). Cell viability was measured using Cell Counting Kit-8 assay, while levels of reactive oxygen species (ROS) weredetermined using fluorimetry. An enzyme-linked immunosorbent assay (ELISA) was used to measure cellular apoptosis. Luciferase reporter assay was used to validate the miR-10b-binding sites of target genes. The levels of T-cell lymphoma invasion and metastasis (TIAM1) and NADPH oxidase-2 (NOX2) were determined using qRT-PCR. Ras-related C3 botulinum toxin substrate 1 (Rac1) activation was evaluated using a pull-down assay. The protein levels of TIAM1 and Rac1 were assayed by western blotting.Results: After HG stimulation, miR-10b expression was downregulated. Viability of HRECs decreased, whereas ROS production increased. However, the overexpression of miR-10b inhibited apoptosis and ROS production in HG-treated HRECs (p < 0.05), while luciferase reporter analysis revealed a possible binding site for miR-10b to target the 3'-untranslated region (UTR) of TIAM1. In addition, the overexpression of miR-10b distinctly reduced the expression levels of TIAM1 and NOX2, but decreased the activation of Rac1 in HG-treated HRECs (p < 0.05); these inhibitory effects of miR-10b were significantly reversed after TIAM1 application.Conclusion: MiR-10b alleviates HG-induced HREC injury by regulating TIAM1 signaling. MiR-10b therapy is a potential therapeutic strategy for patients suffering from diabetic retinopathy. Keywords: MicroRNA-10b, Human retinal endothelial cells, High glucose, TIAM1-Rac1 axis
Development Of Visual Thinking Of Students Specialising In Lighting Design As Part Of The Light Modelling Principles And Methods Discipline

Through the examples of global architecture, art and design schools of the 20th and 21st centuries, the authors conduct historical and comparative analyses of the methods of studying form-making elements of composition as a method of development of visual thinking of students. The article discusses applicability and efficiency of integration of a propaedeutic course on primary elements of composition in the Light Modelling Principles and Methods discipline (Lighting Design specialisation, ITMO University), describes the methodological basis of the discipline.
Analysis of external influences on an OTEC cycle

Ocean Thermal Energy Conversion (OTEC) is a promising renewable energy technology that has vast potential in the tropics. The technology uses the temperature difference between different ocean layers to run a power cycle. The effects of temperature variations for a fixed design of the thermodynamic cycle is one of the questions that has to be answered for this technology. These effects are here analysed for three different working fluids, pure ammonia, ammonia - water mixture and R32 - R134a mixture. An off design model is implemented in MATLAB to analyse the effects. Experiments were performed with pure ammonia in an OTEC experimental set up to validate the model. The heat exchangers in the thermodynamic cycle are one of the most important components since they are large and costly in comparison to other components because of the small temperature difference in the system. Based on the experiments performed, suitable heat transfer correlations were selected. It is still a question if these correlations are suitable for other working fluids especially mixtures. This has to be confirmed with further experiments. The results of the model suggest that in all cases the net power output and the thermal efficiency are proportional to the temperature difference of the ocean layers. Fluctuations in the warm and cold seawater temperature seem to have similar effect on the outcome. Fluctuation of one degree for a 25 MW plant will result in approximately 10 % fluctuation in the net power output. This is considerable and has to be taken into account in economical evaluations for each suitable location. To minimize negative effects the mass flow of the working fluid can be varied however that will only improve the performance to a small degree.
Show Me the Money: The Economic Impact of Membership-Based Free Shipping Programs on E-Tailers

This research examines the economic impact of membership-based free-shipping (MFS) programs when introduced as an augmentation to widely accepted contingent free-shipping (CFS) policies. Under CFS, consumers waive the shipping surcharge if the order exceeds a certain threshold, whereas under MFS, consumers pay an upfront fee and enjoy the free-shipping perk throughout the membership period. We develop a stylized model that considers consumer heterogeneity in two dimensions: (1) disutility from acquiring an auxiliary product—a product that consumers would not otherwise purchase—to qualify for CFS; and (2) shopping frequency over a given period. Our analysis suggests that the introduction of MFS allows the e-tailer to segment the market further, which could lead to a higher product price. When the disutility from acquiring an auxiliary product is moderate, the e-tailer should charge a high membership fee to target only frequent shoppers who forgo CFS. However, the e-tailer should lower the fee to lure also (1) frequent shoppers who would otherwise take CFS, when the disutility is high; or (2) infrequent shoppers who would otherwise forgo CFS, when the disutility is low. In all cases, although the collected fee revenue can never compensate for the cost arising from offering the free-shipping perk, the loss can be recouped as a desirable outcome of a more segmented market. Our research generates insights into the optimal design of e-tailers’ shipping policies, shedding light on the practical challenges that confront e-tailers.
Marketing orientation of tour operators on the European travel agency market

The article addresses implementing the marketing concept to the activities of travel agency market entities using the example of tour operators. The issues of the essence of marketing orientation and the stages of its development are presented. Then, theoretical information on the functioning of the travel agency market is given, along with an indication of the processes taking place in this market. Therefore, the paper discusses the position of tour operators on the tourism market and the problem of shaping the marketing orientation by tour operators in more detail. The relationships of entities in the system of creating marketing orientation on the travel agency market and the factors that determine it are presented. The methodology of the empirical research and the results of research on the level of marketing orientation of tour operators operating in Poland and selected European countries are described synthetically. The study was conducted in the second half of 2016 based on a survey. The research covered 204 tour operators from Poland and 176 from selected European countries. The study aims to present the concept of tour operators’ marketing orientation, together with the presentation of the results of research assessing the level of marketing orientation of tour operators operating in Poland and selected European countries. The work is theoretical and empirical.
Comparative Organizational Performance After Economic Reforms: Evidence From Cuba's Tourist Restaurant Industry

This paper examines the performance of Cuba’s private and state-run tourist restaurants following the economic reforms of 2011. The policy reforms made it easier to open private restaurants, and reduced constraints owners/managers faced in hiring workers, obtaining credit, and procuring supplies. Starting around 2013, some state restaurants were turned over to workers to manage, which had the effect of improving performance. State-owned restaurants continued to operate, and state-sector reforms sought to provide incentives for better performance. I compare the pre and post-reform performance of these organizational forms using online ratings and sentiments expressed in user text reviews and find that private restaurants are always rated more highly. I also extract sentiments about aspects of the restaurant experience, and find that where state restaurants lag most is in service quality. A thriving private sector had the effect that state-owned restaurants also improved after reforms, with the improvement coming primarily from better service.
Preparation and properties of laterally multifluorinated benzoxazole-based nematic mesogens

ABSTRACT Series of laterally multifluorinated heterocyclic compounds, 2-(2ʹ,3-difluoro-4ʹ-alkoxy-1,1ʹ-biphenyl-4-yl)-benzoxazole derivatives (nPF(2)PF(3)Bx), are prepared and characterised. They mainly display enantiotropic nematic mesophases with wider mesophase ranges of 12–107°C (heating process) and 22–134°C (cooling process) than the corresponding analogues. The enhanced nematic mesophase stability is achieved via slightly increasing inter-ring twist angle with inter-ring lateral fluorine substitute in biphenyl unit, as well as through improving the molecular polarity with multifluorine substitutes. Meanwhile, two inter-ring lateral fluorine atoms lead to a decrease in melting/clearing points and a wide nematic mesophase range, which makes it possible for heterocyclic mesogens nPF(2)PF(3)Bx to use in nematic liquid crystal display mixtures. GRAPHICAL ABSTRACT
Vitamin D Deficiency is Less Prevalent Among Children with Common Medical Illnesses than Apparently Healthy Children in Sub-Saharan Africa: A Systematic Review and Meta-Analysis

Mohammed Feyisso Shaka 1* Robel Hussen kabthymer , Meiraf Daniel Meshesha Dilla University, College of Health and Medical Sciences, School of Public Health, Dilla, Ethiopia robelhussen@rocketmail.com Dilla University, College of Health and Medical Sciences, School of Medicine, Dilla, Ethiopia *corresponding authorMohammed Feyisso Shaka (MF) Email: mamfys8@gmail.com Background: Studies shows that 25(OH)D status appears to have some beneficial influence on the incidence and severity of some types of infections. However, studies with vitamin D supplementation on young children produced conflicting results. Method: A systematic review of PubMed, CINAHL, Web of science, global health and Google scholar electronic databases was conducted. STATA Version 14 was used for analysis. Heterogeneity of studies was assessed using I test. A random-effects model was used to estimate the pooled prevalence among both healthy and sick children. Result: A total of 1212 articles were retrieved from data bases of which 13 papers were included. The pooled prevalence of vitamin D deficiency among healthy children was 50.06% with mean serum vitamin D level of 41.06 nm/L. The pooled prevalence among the sick children was 39.36% with 66.96nm/L of mean concentration. The pooled prevalence among healthy children was significantly higher compared to those who have common medical illnesses and the pooled mean concentration among the sick was also much higher than the mean concentration among healthy children. Conclusion: The pooled prevalence among both group of population was significantly of public health concern and the prevalence among healthy children was much higher among sick children.
Updated checklist of the Umbelliferae of Middle Asia and Kazakhstan: nomenclature, synonymy, typification, distribution

The region of Middle Asia and Kazakhstan with 107 genera, 459 species and 204 endemic species is one of essential Umbelliferae diversity centers not only in Asia, but also in the world. The biggest Umbelliferae genera in the region are Ferula (100 species), Seseli (49), Elwendia (19), Bupleurum (18), Elaeosticta (18), Prangos (16), Semenovia (16). The diversity of the family by country is as follows: Kazakhstan (82 genera – 211 species – 28 endemic species), Uzbekistan (68 – 200 – 18, respectively), Kyrgyzstan (65 – 192 – 29), Tajikistan (65 – 176 – 20), and Turkmenistan (51 – 122 – 9). The latter differs considerably from other countries of the region not only in lesser diversity, but also in generic and specific sets, approaching the features of Iranian Umbelliferae. The distribution of species was described with regard to provinces of all five countries. The list of endemic species for each country was compiled on the basis of field, herbarium and published data. There are 16 endemic genera in Middle Asia and Kazakhstan, including Astomatopsis, Autumnalia, Fergania, Kafirnigania, Karatavia, Komarovia, Kuramosciadium, Lipskya, Mogoltavia, Paulita, Pilopleura, Schtschurowskia, Sclerotiaria, Sphaenolobium, Sphaerosciadium, and Tschulaktavia, 6 other genera being subendemics. Across the region the important border between Middle Asian (eastern part of SW Asian floristic province of the Mediterranean type) and Central Asian phytochoria passes; the former being considerably richer in the Umbelliferae than the latter.
Controllable Preparation of Nanoscale Metal–Organic Frameworks by Ionic Liquid Microemulsions

With particle sizes down to the nanoscale, nano-metal–organic frameworks (NMOFs) with well-controllable dimensions exhibit many potential applications in drug delivery, biosensing, and biomedical imaging. Although the microemulsion method provides an efficient approach for preparing nanoparticles, the synthesis of NMOFs with narrow size distribution is a great challenge. In this work, nanoscale zeolitic imidazolate frameworks (NZIFs), considered as a subclass of MOFs, were synthesized by the ionic liquid-containing microemulsion system of H2O/BmimPF6/TX-100. The obtained NZIFs have extremely small size of no more than 2.3 nm, narrow distribution of less than 0.5 nm, and good thermal stabilities. By addition of ethanol into the H2O/BmimPF6/TX-100 system, [Cu3(BTC)2(H2O)3]n (HKUST-1) was successfully synthesized with nanodimensions similar to those of NZIFs. The molecule dynamic simulation reveals that one new microemulsion was formed in which the ethanol and water molecules were capsuled by the surfactant .
The Impact of Gender on Unemployment: Cross‑country and Within‑country Analysis of the European Labour Markets during Economic Recession

This paper investigates the impact of gender on the individual probability of being unemployed and makes a cross‑country comparison across 13 European countries during the European recession. Applying a general logit model for each country and capital, whilst controlling for the year, as well as for individual and regional characteristics, the probability of unemployment was estimated using individual labour force data from 2011 to 2014. Cook’s distance is used to examine the differences between labour markets of capital regions (or cities) and non‑capital regions. Using the size of Cook’s distance, models are calibrated, and models which include the degree of urbanization and occupation type are evaluated. The results are presented in the form of a spatial map and show that gender affects the probability of unemployment in the majority of the analysed countries. Overall, the effect is lower in capital than in non‑capital regions.
Closed-cell and open-cell porous polymers from ionomer-stabilized high internal phase emulsions

We firstly present a strategy that enables fabrication of both closed-cell and open-cell porous polymers (polyHIPEs) from high internal phase emulsions (HIPEs) stabilized with an ionomer, namely sulfonated polystyrene (SPS). Closed-cell polyHIPEs (St-polyHIPEs) were formed with styrene as the continuous phase in “parent” HIPEs whereas open-cell polyHIPEs (BA-polyHIPEs) were obtained with butyl acrylate as the continuous phase. The average diameters of pores in closed-cell St-polyHIPEs are 91.6 and 68.9 to 42.7 μm corresponding to the increase of the dispersed phase from 75 and 80 to 83 vol% in “parent” HIPEs, respectively. The surface of these closed pores is rough with scars, and the average number of scars per pore increases from 1.6 to 5.3 with increasing the ionomer concentration from 0.2 to 1.5%. The average sizes of both pores and windows in open-cell BA-polyHIPEs increase with the increasing content of the dispersed phase. The average diameters are 39.5, 48.5 and 65.3 μm for pores and 5.3, 7.8 and 13.4 μm for windows, corresponding to 75, 80 and 83 vol% of the dispersed phase in “parent” HIPEs. Amphiphilicity of these polyHIPEs can be reversibly and simply tuned by dipping them into solutions with different pH values, demonstrating that the ionomer is not removed during the purification. Ionomer-stabilized HIPEs provide a new approach for control over the size and interconnectivity of pores as well as the surface roughness and amphiphilicity of resultant porous polymers.