Miracle-dz/UniFAR-FTUs huggingface dataset:
Low-temperature hall effect and martensitic transition temperatures in magnetocaloric Ni50Mn35Sb15−xGex (x = 0, 1, 3) alloys

The field dependence of Hall resistivity ρH and magnetization M of the magnetocaloric Ni50Mn35Sb15−xGex (x = 0, 1, 3) alloys were measured at T = 4.2 K and in magnetic fields of up to 70 kOe. The martensitic transitions temperatures, i.e., the martensite start temperature MS, martensite finish temperature MF, austenite start AS and austenite finish AF temperatures, were obtained from the magnetization temperature dependence that measured from 4.2 to 350 K in a field of 1 kOe. It was observed that the martensitic transitions temperatures correlate strongly both with the valence electron concentration e/a and with the electronic transport characteristics, which are the coefficients of normal R0 and anomalous RS Hall effect and the concentration of charge carriers n. Apparently, similar correlations should be observed in other magnetocaloric compounds that could be used to study martensitic transitions.
Effects of Fertigation Management on the Quality of Organic Legumes Grown in Protected Cultivation

Appropriate fertigation management plays an important role in increasing crop quality and economizing water. The objective of the study was to determine the effects of two fertigation treatments, normal (T100) and 50% sustained deficit (T50), on the physico-chemical quality of legumes. The determinations were performed on the edible parts of peas, French beans and mangetout. The trials were conducted in a protected cultivation certified organic farm. The response of legumes to the treatments varied between the cultivars tested. The fertigation treatments had a significant effect on the morphometric traits (width for mangetout and French bean; fresh weight for French bean; seed height for Pea cv. Lincoln). The total soluble solids and citric acid content have been shown to be increased by low soil water availability (T50) for mangetout. Fertigation treatments did not significantly affect the antioxidant compounds (total phenolic and ascorbic acid), minerals and protein fraction contents of legumes studied. Regarding legume health benefits, the most prominent cultivars were BC-033620 pea and French bean because of their high total phenolic (65 mg gallic acid equivalent 100 g−1 fresh weight) and ascorbic acid content (55 mg ascorbic acid 100 g−1 fresh weight), respectively. The results expand our knowledge concerning the nutraceutical quality and appropriate cultivation methods of legumes in order to make the system more sustainable and to encourage their consumption.
Data Science Applied to Crime Analysis Based on Brazilian Open Government Data

Abstract Context: The criminality phenomenon affects the quality of life, the economic growth and the reputation of a nation. Each year, governments spend millions of dollars fighting violence, and consequently, crime prevention and control are highly concerning issues to the public safety agencies. Objective: Applying Data Science fundamentals to analyze open government data on the crimes that occurred in the Brazilian States. Method: We have conducted a controlled experiment to discover the association rules (AR) between the crimes and the States. Additionally, we have developed a ranking of the most dangerous States. Results: From a general viewpoint, with weights for all available crimes, Paraná was the most dangerous local during all the assessed years, followed by Rio de Janeiro. From the single perspective of murders, in 2019, the States of Roraima, Rio Grande do Norte, Sergipe, Acre and Pernambuco were ranked as the ten most violent ones, being Pernambuco and Acre among the most dangerous States from the two perspectives (weighted average and murders). Conclusion: The Data Science enables the execution of more precise diagnoses. The year of 2019 presented a general drop in the crime rates, with special emphasis on Paraíba, Goiás, Rio Grande do Norte and Ceará.
MMS Observations of Reconnection Separatrix Region in the Magnetotail at Different Distances From the Active Neutral X‐Line

The region surrounding the reconnection separatrix consists of many particle and wave transient features (electron, cold and hot ion beams, Hall E&B fields, kinetic Alfvén, LH, etc. waves) whose pattern and parameters may vary depending on the distance from active neutral line. We study nine quick MMS entries into the plasma sheet boundary layer (PSBL) from the tail lobe to address the meso‐scale pattern and other characteristics of phenomena for active separatrix crossings as deduced from particle observations. The outermost thin layer (a fraction of ion inertial scale, di) of low‐density plasma consists of accelerated electron beams and lobe cold ions and displays density depletions (EBL region). It is followed by hot proton beam (PBL region) in which the plasma density grows from lobe‐like towards plasma sheet‐like values; the beam energy‐dispersion is used to estimate the distance from the active neutral line. Thin (usually ≤ di) region containing intense Hall‐like Ez perturbations (HR) usually overlaps with EBL and PBL regions. It often includes correlated B perturbations suggesting the Alfvén wave‐related transport from the reconnection source; the estimated Alfvénic ratio δE/(VA δB) varied between 0.3 and 1.3 in studied examples. The HR is associated with profound plasma property changes, including the heating of cold ion beams in its innermost part, it hosts intense structured field‐aligned currents and intense E‐field fluctuations. Surprisingly, most of abovementioned findings are valid for crossings observed at large distances from the reconnection region (exceeding a few tens Re or >100 di) except for longer time‐scales and larger spatial scales of the pattern.
Effects of deposition rate on the structure and electron density of evaporated BaSi2 films

In order to control the electrical properties of an evaporated BaSi2 film, which is an emerging candidate for the absorber-layer material of earth-abundant thin-film solar cells, we have investigated the effects of deposition rate on the produced phases, microstructure, and carrier density of the thin films grown by thermal evaporation of BaSi2. X-ray diffraction results show that a high substrate temperature is necessary for BaSi2 formation at a high deposition rate, which is discussed from viewpoints of vapor composition and diffusion time. Microstructural characteristics such as grain size of 30–120 nm, oxide particle arrays present around the interface, and partial oxidation at a low substrate temperature are revealed by cross-sectional transmission electron microscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy combined with an energy-dispersive X-ray spectroscopy. With increasing deposition rate, the crystalline quality of BaSi2 is found to improve, as evidenced by a decrease.
Influence of Chitosan Nanocomposite and Rosemary (Rosmarinus officinalis L.) Extract Coating on Quality of Huso huso Fillet Inoculated with Listeria monocytogenes During Refrigerated Storage

ABSTRACT This study aimed to evaluate the antilisterial and antioxidative effects of chitosan nanocomposites and rosemary extract coating on the fillet of Huso huso inoculated with Listeria monocytogenes during refrigerated storage (4°C). Fish fillets were subjected as control (without coating), 0.5% rosemary extract (RE), 1% chitosan (CS), and combination of chitosan and rosemary extract as chitosan nanocomposite (CS/RE). Then, samples were inoculated with L. monocytogenes. Subsequently, the chemical parameters (total volatile basic nitrogen (TVB-N), peroxide value (PV), pH, and thiobarbituric acid (TBA)) and antilisterial effects of coatings were monitored during 16 days of storage at 4°C. According to the results, CS/RE demonstrated a significant (p < 0.05) ability to inhibit the growth of L. monocytogenes from 4.14 log cfu/g to 2.23 log cfu/g at the end of the storage period, followed by CT and RET treatments, respectively, compared to the control. Even though samples coated with CS/RE had the lowest pH and TVB-N values (p < 0.05), this coating was not able to pause the protein denaturation after 8 days of storage (p > 0.05) compared to the other treatments. On the other hand, CS/RE coating retarded lipid oxidation by decreasing PV and TBA production in the samples compared to the control up to the end of refrigerated storage (p < 0.05).
ESG Reporting and Analysts’ Recommendations in GCC: The Moderation Role of Royal Family Directors

This study examines whether financial analysts consider or incorporate the environmental, social and governance disclosures (thereafter ESG) in their recommendations. We then test whether royal family directors affect this relation. Using a dataset from six Gulf Cooperation Council (GCC) countries, we find evidence that analysts’ recommendations are influenced by ESG information. Further, we find the political connection negatively moderates the relationship between sell-side analysts’ recommendations and ESG. This suggests that financial analysts may assess the ESG disclosure in those firms with the political connection of royalty, in GCC countries, as superficial compliance rather than a genuine commitment. Our results are robust when subjected to endogeneity tests.
Deep-learning-based spraying area recognition system for unmanned-aerial-vehicle-based sprayers

: Unmanned aerial vehicle (UAV)-based spraying system employing machine learning techniques is a recent advancement in precision agriculture for precise spraying, promoting saving chemicals (pesticide/herbicide), and enhancing their effectiveness. This study aims to develop an eﬀicient deep learning system for UAV-based sprayers, which has the capability to accurately recognize spraying areas. A deep learning system is proposed and developed incorporating a faster region-based convolutional neural network (R-CNN) for the imagery collected. In order to develop a classifier for identifying spraying areas from nonspraying areas, four different agriculture croplands and orchards were considered. All the experiments were performed in agriculture fields through DJI Spark with an RGB camera. During experimentation, heights of 2.5 m and 6 m were attained for cropland and orchard image collection. The developed recognition system achieved 87.77% and 88.57% accuracy for recognizing spraying areas in crops and orchards, respectively, for a limited dataset and variable target sizes. The developed deep learning system on comparison outperformed other machine learning and deep learning systems in the literature. The developed system could be easily integrated into real-time UAV-based sprayers for precision agriculture.
Banking structure, economic resilience and unemployment trajectories in US counties during the great recession

How might the structure of banking affect economic resilience? We address this question by analyzing how the organizational structures of banks and banking markets were associated with unemployment trajectories in local economies during the Great Recession. Two county-level analyses yield convergent results. Increasing branch densities of giant derivative holding banks within local economies were associated with greater surges in unemployment, weaker employment recoveries and stronger recession effects on unemployment from 2007 through 2016. Increasing branch densities of community banks and credit unions and localism in banking were associated with lower unemployment spikes, stronger recoveries and dampened crisis effects. These findings advance sociological studies of finance by providing new quantitative evidence for links between the social structures of banking and economic performance. They also confound arguments that decentralized systems of small, locally based financial institutions are inherently fragile by design, suggesting instead that alternatives to ‘too-big-to-fail’ banking can enhance local economies’ capacities to adapt proactively, withstand crisis and sustain employment during recessions.
Experimental study of thermoelectric cooler box using heat sink with u-shape heat pipe and methanol working fluid

Thermoelectric refrigeration system is considered environmentally friendly because it does not use refrigerants which have huge potential damaging the ozone layer. In this experimental work, u-shape heat pipe with heat sink was charged with methanol working fluid with different filling ratios to observe its effect on the thermoelectric performance. The cooler box has 240 mm x 180 mm x 130 mm of inner dimension. 37.3 watt DC power supply supplied constantly to the thermoelectric module to performed cooling action. The result shows that methanol with 45% and 55% filling ratios has the maximum COP about 0.03881 and 0.03885 respectively. This filling ratio also provides for a lower cabin temperature and temperature difference between the cold and hot thermoelectric sides.
Personal marketing and the recruitment and selection process: Hiring attributes and particularities in tourism and hospitality

ABSTRACT The competitiveness of the labour market is a critical challenge for future professionals. This work intends to analyse the importance of personal marketing in the professionalization of human resources, as well as the most valued skills in the labour market. For this purpose, sample was composed of recent graduates in tourism/hospitality and other areas (for comparison). The main results show that using personal marketing techniques in job search, develop a personal brand and digital social strategically are perceived as key in the tourism industry. This work enables academic institutions to better adjust tourism degree programmes, as well as a more efficient programme assessment and evaluation. It also provides employees valuable information to be more competitive in the labour market.
Role of some serum biomarkers in the early detection of diabetic cardiomyopathy

Aim: To assess the role of serum biomarkers in early prediction of diabetic cardiomyopathy. Materials and methods: The participants were three groups of Type 2 diabetes mellitus (DM) patients having diastolic dysfunction (DM-DD), systolic dysfunction (DM-SD) and normal echocardiography (DM-N) with two control groups: non-DM diastolic dysfunction patients (DD) and healthy controls. AGEs, TNF-α, IL-6, IGFBP-7, creatinine and insulin were assessed. Results: TNF-α, AGEs, creatinine and insulin panel had area under the curve (AUC) of 0.913 in distinguishing DM-DD from DM-N (78.7% sensitivity and 100% specificity). IL-6 and AGEs panel had AUC 0.795 for differentiating DM-SD from DM-DD (90.6% sensitivity). IL-6, TNF-α and AGEs panel had AUC 0.924 for differentiating diabetic cardiomyopathy from DM-N (85% sensitivity and specificity). Conclusion: A panel of AGEs, IL-6, TNF-α, insulin and creatinine might be used for early detection of DM-DD among T2DM patients.
Prognostic and clinical significance of Solute Carrier Family 7 Member 1 in ovarian cancer

Background Members of the solute carrier (SLC)7 family are known to play important roles in tumorigenesis and development. However, the prognostic significance of the SLC7 family in ovarian cancer (OC) remains unknown. Methods Expression patterns of SLC7 family members in OC were analyzed using gene expression profiling interactive analysis (GEPIA). The Kaplan-Meier plotter was applied to evaluate associations of the SLC7 gene family with prognosis of OC. SLC7A1 expression was additionally analyzed via immunohistochemical staining. χ2, Kaplan-Meier and Cox regression analysis were used to evaluate the relationship between SLC7A1 expression and clinicopathological features, platinum resistance and prognosis in patients with high-grade serous ovarian cancer (HGSOC). Results The GEPIA dataset revealed the abundant expression of SLC7A1, SLC7A4, and SLC7A7, and conversely, the low expression of SLC7A2 and SLC7A8 in OC relative to normal tissue samples. Kaplan-Meier survival analysis further indicated that high SLC7A1 and low SLC7A2 mRNA levels were significantly associated with overall survival (P<0.05). Positive SLC7A1 expression was detected in 65 (58.1%) HGSOC tissue samples, but not in all normal ovarian tissue samples (100%), indicating that the expression of SLC7A1 in HGSOC tissues was significantly higher than that in normal ovarian tissues (P<0.001). Additionally, expression of SLC7A1 was negatively associated with relapse-free survival (RFS; P<0.05). Conclusions SLC7A1 is a potential prognostic biomarker of OC.
Circulation pattern control of wet days and dry days in Free State, South Africa

Atmospheric circulation is a vital process in the transport of heat, moisture, and pollutants around the globe. The variability of rainfall depends to some extent on the mechanisms of atmospheric circulation. This paper uses the concept of classifying the recurrent large-scale atmospheric circulation patterns in southern Africa, and the linkage of the classified patterns to wet days and dry days in Free State, South Africa, for the analysis of how the probability of wet and dry events in Free State can be associated with specific synoptic situations, in addition to the underlying dynamics. Principal component analysis was applied to the T-mode matrix (column/variable is time series and row is grid points at which the field was observed) of daily mean sea level pressure field from 1979 to 2018 in classifying the recurrent circulation patterns in southern Africa. 18 circulation types (CTs) were classified in the study region. From the linkage of the CTs to the observed rainfall data, from 11 stations in Free State, it was found that dominant austral winter and late austral autumn CTs have a higher probability of bringing dry days to Free State. Dominant austral summer and late austral spring CTs were found to have a higher probability of bringing wet days to Free State. Cyclonic/anti-cyclonic activity over the southwest Indian Ocean, explained to a good extent, the inter-seasonal variability of rainfall in Free State. The synoptic state associated with a stronger anti-cyclonic circulation at the western branch of the South Indian Ocean high-pressure, during austral summer, leading to enhanced moisture transport by southeast winds was found to have the highest probability to bring above-average rainfall in most regions in Free State; while the synoptic state associated with enhanced transport of cold dry air, from the Benguela current, by the extratropical westerlies was found to be associated with the highest probability of (winter) dryness in Free State.
Dependence of tropical cyclone intrinsic intensity variability on the large‐scale environment

This study examines the dependence of tropical cyclone (TC) intrinsic intensity variability on the large‐scale environment. Using idealized simulations with the Hurricane Research and Forecasting (HWRF) model, the growth of TC intensity errors and the subsequent saturation of intensity errors at the mature stage are quantified for a range of environmental conditions. Among several factors, it is found that sea‐surface temperature (SST) and tropospheric static stability are the two main ones affecting the growth rate and saturation of TC intensity errors, with a larger error saturation at maximum intensity equilibrium and a faster error growth rate during rapid intensification for a warmer SST or less stable troposphere. Results from this study highlight the fundamental characteristics of TC intensity predictability, which appears to vary with environmental conditions, instead of being a universal measure for TCs in all ocean basins. These results also suggest a limit on TC intensity forecast accuracy that is governed by the large‐scale environment, which needs to be taken into consideration for future TC model development.
Fostering Stakeholder Engagement through Companies’ Website: A Comparison between Sector

During the years, different authors underline the role of CSR communication as an instrument of transparency towards the stakeholders of each company. In the scenario emerge the importance of stakeholder engagement for estabilish between company and stakeholders “proactive and ongoing dialogue”, trough Internet and it’s tools as a facilitator of corporate communicative action. With the aim of communicating with the stakeholders, companies can implement different methods of engagement. Operating in different sectors many time it is an additional variable that influences the practice of CSR communication, will it be the same for the stakeholder engagement methods adopted? This contribution analyses, through a content analysis, all the stakeholder engagement tools used by the 316 companies listed in DJSI on their institutional websites. The DJSI companies are strongly motivated to commit in economic, social and environmental terms and belonging to 24 different sectors thus allowing to carry out inter-sectoral analyzes. There are two main results: prevailing use of one-way communication tools regardless of the sector of the company and a widespread choice to use social media as the main two-way communication tool. If the sector of belonging, in other study has turned out to be an influential variable, the same cannot be said in relation to stakeholder engagement tools. This study has three main limitations: data change speed, language and method. In the future, understanding the expectations and needs of stakeholders related to CSR communication could be intersting to analyse.
Soil management effects on phosphorus sorption and external P requirement in oxisols of Malawi

Oxisols are one of the major soils of Malawi and they are high in P sorption. Conservation agriculture has been practiced on this soil for some years now but soil management effects on P sorption and external P requirement (EPR) of Oxisols in Malawi have not, however, been determined. Soil management effects on P sorption and EPR of Oxisols in Malawi were therefore determined in the present study. The effects studied were conventional tillage (CT), no-tillage (NT) and crop rotation (CR). The soils differed considerably in their sorption characteristics, with the sorption maxima ranging from 413 to 345 mg P kg-1. Differences in sorption maxima and affinity due to soil management effects were statistically significantly (P ≤ 0.05). The sorption affinity (b) values ranged from 0.48 to 0.72 dm3 mg-1 and differences due to soil management effects were statistically significant (P ≤ 0.05) only between conventional tillage (CT) and no tillage (NT) or crop rotation (CR). The sorption affinity due to NT was not statistically significant from that of CR. The b values were the highest in soils that had been subjected to CT. Key words: Oxisols, soil management effects, sorption affinity, sorption maxima, external P requirement.