Miracle-dz/UniFAR-FTUs huggingface dataset:
Geopolitical Risk and Tourism Stocks of Emerging Economies

A bulk of literature suggests that geopolitical events such as terrorist attacks dampen tourism demand. However, there is little research on whether this effect helps predict the return of the tourism equity sector. We provide country-level evidence on whether local and global geopolitical risk (GPR) predicts the first and second moments of tourism stocks in emerging economies. This objective was achieved by employing the non-parametric causality-in-quantiles (CiQ) model and a cross-quantilogram (CQ) test, which allowed us to uncover the predictive potential of GPR for the tourism sector equities. Our findings, obtained through the CiQ model, suggest that while both local and global GPRs carry significant potential for predicting the returns and volatility of tourism stocks of most emerging economies under normal market conditions, they seem to play no such role in certain countries. These countries include South Korea, for which only a limited number of tourism stocks trade on the domestic stock market compared to other sectors, and Colombia, for which both the domestic stock market and tourism sectors are at an emerging stage. Further, it turns out that, compared to its local counterpart, global GPR has a more pronounced predictive power for the tourism stocks of emerging economies. Finally, with some exceptions, the results are qualitatively similar, and hence reasonably robust, to those when a directional predictability model is applied. Given that geopolitical shocks are largely unanticipated, our findings underscore the importance of a robust tourism sector that can help the market recover to stability as well as an open economy that allows local investors to diversify country-specific risks in their portfolios. Implications and directions for future research are discussed.
Role of Coronary CT Angiography in Spontaneous Coronary Artery Dissection.

Spontaneous coronary artery dissection (SCAD) is more common than previously thought and is present in up to 4% of patients presenting with acute coronary syndrome. SCAD predominantly occurs in relatively young women and is an important cause of myocardial infarction in young patients without traditional risk factors of atherosclerotic coronary artery disease. There have been substantial improvements in spatial and temporal resolution and reduction in ionizing radiation dose with new generation scanners. The risk of dissection propagation with an invasive coronary angiogram, improved CT scanner parameters, and predominantly conservative management of SCAD make coronary CT angiography a useful noninvasive imaging modality for the assessment of SCAD. © RSNA, 2020.
Displacement behavior of methane in organic nanochannels in aqueous environment

Shale is rich in organic nanopores where shale gas mainly resides. Shale gas development is often accompanied by water, so studying interactions of gas and water in organic nanopores has become an important topic. Here, we performed molecular dynamics simulations to study the interaction of gas and water in organic nanochannels. It was found that water molecules in the nanochannel could be displaced by methane molecules. And the entered methane molecules would exhibit different layered structures. The above phenomenon is attributed to the fact that methane molecules have lower potential of mean force than water molecules in nanochannels. The revealed mechanism of displacing water molecules with methane molecules in organic nanochannels provides an insight into the interaction of water molecules and methane molecules in organic nanochannels and has tremendous potentials in the development of shale gas. Cited as : Huai, J., Xie, Z. , Li, Z. , Lou, G. , Zhang, J., Kou, J., Zhao, H. Displacement behavior of methane in organic nanochannels in aqueous environment. Capillarity, 2020, 3(4): 56-61, doi: 10.46690/capi.2020. 04.01.
Economic inequality affects perceived normative values

The degree of economic inequality may lead to different environments where people develop motives and behaviours that lend them higher chances of survival. However, the specific features attributed to an environment with a particular level of economic inequality have received little research attention. In this research, we explored how perceived economic inequality may influence the values inferred as normative in society. Results from three studies, one correlational and two experimental, showed that perceived normative values change according to the degree of perceived economic inequality in a given context: higher levels of perceived economic inequality are related to normative self-enhancement values, whereas lower levels of perceived economic inequality are related to normative self-transcendence values. These results are discussed in terms of how information on economic inequality is used to build a general perception of the normative climate in society and, accordingly, of the values that would best guide behaviours.
Local Improvement Districts as Political Participation Signals

A significant amount of literature has inspected the relationship between public–private partnerships and state and local government. This literature has focused primarily on how these agreements shape financing, economic development, and public policy measures. There is little research, however, on how improvement districts may affect political participation. There are many reasons to believe that these districts may raise levels of political participation, as they deeply affect state and local politics and shape the socioeconomic development of local communities. This article fills this gap in the literature by exploring the relationship between the establishment of local improvement districts and voter participation rates. An original data set is constructed from 18 state assembly districts and 22 local improvement districts in New York City across nine elections between 2002 and 2018, resulting in 198 unique observations across time. Empirical results reflect how the development of improvement districts can serve as signals for rising political participation in surrounding areas, marked by increasing rates of voter turnout across midterm and presidential-year election cycles. These findings are compelling, providing insight into how local organizations designed and sustained through issue ownership and community collaboration have the ability to raise political participation through electoral activity.
Scanning of Thesis Script Similarity with Vector Space Model

The rapid growth of online textual data has increased the need for information retrieval (IR) methods that is time efficient. Text classification is the process of finding the category of a document based on its content. However, few discuss text classification using cascading texts. In general, text classification uses the Vector Space Model (VSM) proposed by Salton, Wong, and Yang (1975) as a model for document representation and queries. One of the limitations of VSM is the problem of space, because each document must be represented using all the words in the dictionary (i.e. vocabulary). With the convenience provided by search engines to assist users in searching for information online, the internet is the dominant data and information center. No exception for students, the level of internet use in finding references is very high. Statistics released by the Indonesian Internet Service Providers Association (APJII) in 2019 stated that Indonesian internet users had reached 171.17 million people or around 64.8%. Young people with an age range of 15-34 years dominate the number of users up to 49.52%. There is possibilities of similarities in publication, due to the large number of scientific publications that are published each year. The highest level of similarity in the thesis text is in the title and theoretical study. In searching for references for theoretical studies, students tend to plagiarize on a scientific work by copying part or even the entire content without mentioning the original source of the scientific work. Therefore, this research aims to create a document similarity detection system using the Vector Space Models (SVM) method. The data sets used to detect the similarities were 443 undergraduate thesis titles and 442 studies on the theory of thesis texts. From the accuracy test carried out on 132 queries from 321 thesis texts, it was obtained a mean average precision of 0.996.
Comparison of corrosion behavior of Al‐Mn and Al‐Mg alloys in chloride aqueous solution

The microstructure and corrosion behavior of Al‐Mn alloy 3A21 and Al‐Mg alloy 5A05 in 3.5% NaCl solution were examined and compared. The results of the microstructure survey performed by optical microscope confirm the inhomogeneous nature of the intermetallic particles of the two alloys. The X‐ray diffraction (XRD) analysis reveals the presence of intermetallic Al6Mn and Al6(FeMn) particles in the 3A21 alloy and Al3Mg2, Mg2Si and FeAl3 particles in the 5A05 alloy, respectively. Electrochemical results, in parallel with corrosion morphology characterization, show that these two alloys both suffer pitting corrosion type attack under the conditions employed in the present study, with better corrosion resistance and stronger repassivating capability for the 5A05 alloy. Furthermore, the validity of the difference ΔE (Epit–Ecorr, Ecorr–Eprot) and Eptp as criteria for susceptibility to localized corrosion of aluminum alloys are also discussed.
Descent Angle Calculation for UAVs using Monocular Camera

In this paper, an approach for solid angle calculation for autonomous landing of UAVs/AVs using a monocular camera and 2D image of the helipad is introduced. Autonomous landing has always been a prime research field that is complex and unique in the field of automation. The proposed method that uses object detection and homography to generate relative flight angles Yaw, Pitch, and Roll. First, an object detection algorithm is used to locate the landing pad in an image and extract the required region of interest (ROI). This ROI is then preprocessed using OpenCV and key corners of the landing pad are extracted. Further, these extracted coordinates are mapped to a reference image and relative homography is calculated. Decomposing the homography matrix results in Euler angles which give the angles of UAVs/AVs with respect to the landing pad. General Terms Object Detection, YOLO, Homography
Über die Systeme Alkalimetallchlorid/Chrom(II)-chlorid†

In den Systemen des CrCl2 mit CsCl, RbCl und kCl treten jeweils Verbindungen des Typs ACrCl3 und A2CrCl4 auf. Bis auf das Cs2CrCl4 schmelzen sie kongruent. Im System NaCl/CrCl2 existiert nur das inkongruent schmelzende Na3CrCl5. Zwischen LiCl und CrCl2 herrscht auf der LiCl-reichen Seite Mischkristallbildung, wahrend auf der CrCl2-reichen Seite das System vom eutektischen Typ ist. In der Mischungslucke bildet sich bei tiefer Temperatur eine Verbindung, deren Zusammensetzung nicht ermittelt werden konnte. CsCrCl3 kristallisiert im hexagonalen Perowskit-Typ (CsNiCl3-Typ). Es liegt demnach keine JAHN-TELLER-Verzerrung vor. Das Gitter des RbCrCl3 ist ahnlich, aber anscheinend von niederer Symmetrie. Die Verbindungen Cs2CrCl4 und Rb2CrCl4 kristallisieren im K2NiF4-Typ; K2CrCl4-Typ; K2CrCl4 wahrscheinlich im gleichen Typ aber, mit verzerrtem Koordinations-oktaeder. Das Vorliegen tetraedrischer Koordination bei den Verbindungen des Systems CsCl/CuCl2 wird auf den kleineren Radius des Cu2+-Ions sowie auf den geringeren Ionenbindugsanteil der Cu–Cl-Bindung zuruckgefuhrt. Compounds of the types ACrCl3 and A2CrCl4 are found in the systems formed by CrCl2 with CsCl, RbCl and KCl. Except for Cs2CrCl2 they have congruent melting points. In the system NaCl/CrCl2, only the incongruently melting compound Na3CrCl5 exists. Mixed crystals are formed on the LiCl-rich side of the system LiCl/CrCl2, while on the CrCl2-rich side the system is of the eutectic type. Tn the miscibility gap there occurs, at low temperatures, a compound the composition of which could not be determined. CsCrCl3 crystallizes in the hexagonal perovskite structure (CsNiCl3 type) and shows no JAHN-TELLER distortion. The crystal structure of RbCrCl3 is similar but apparently of lower symmetry. The compounds Cs2CrCl4 and Rb2CrCl4 are isotypic with K2NiF4, and K2CrCl4 is probably similar but with distorted octahedral co-ordination. The mostly tetrahedral co-ordination of the compounds belonging to the system CsCl/CuCl2 is attributed to the smaller radius of the Cu2+ ion and to the lower ionic character of the Cu–Cl bond.
THE BAKIĆES AS AN EXAMPLE OF THE SOCIAL RISE OF VLACH FAMILIES IN THE EARLY OTTOMAN PERIOD

During the period of Ottoman penetration and stabilization in the Balkans, one community within what was then Serbian society gained importance. They were pastoralists who were referred to in documents of the time as Vlachs. Vlach communities that specialized in extensive pastoralism are recorded in the oldest documents related to medieval Serbia from the end of the twelfth and the beginning of the thirteenth centuries. Over time, these groups took on a Serbian ethnicity. The collapse of classical feudalism and the specific Ottoman system, especially in the hinterlands and sparsely populated areas, gave the Vlach communities opportunities for meaningful social progress. The paper analyzes the rise of the Vlach Bakić family, who rose to power during the second half of the fifteenth and the first half of the sixteenth centuries, first within the Ottoman Empire and then later within Habsburg Hungary.
Seasonal and Diurnal Variations in the Relationships between Urban Form and the Urban Heat Island Effect

At the city scale, the diurnal and seasonal variations in the relationship between urban form and the urban heat island effect remains poorly understood. To address this deficiency, we conducted an empirical study based on data from 150 cities in the Jing-Jin-Ji region of China from 2000 to 2015. The results derived from multiple regression models show that the effects of urban geometric complexity, elongation, and vegetation on urban heat island effect differ among different seasons and between day and night. The impacts of urban geometric factors and population density in summer, particularly those during the daytime, are significantly larger than those in winter. The influence of urban area and night light intensity is greater in winter than in summer and is greater during the day than at night. The effect of NDVI is greater in summer during the daytime. Urban vegetation is the factor with the greatest relative contribution during the daytime, and urban size is the dominant factor at night. Urban geometry is the secondary dominant factor in summer, although its contribution in winter is small. The relative contribution of urban geometry shows an upward trend at a decadal time scale, while that of vegetation decreases correspondingly. The results provide a valuable reference for top-level sustainable urban planning.
The application of TiO2 photocatalysis for disinfection of water contaminated with pathogenic micro-organisms: a review

The use of semiconductor photocatalysis for treatment of water and air has been the topic of intense research activity over the past 20 years. This powerful process has also been extended to the disinfection of environments contaminated with pathogenic micro-organisms. This review summarizes recent developments concerned with the photocatalytic treatment of water contaminated with pathogenic micro-organisms presenting a potential hazard to animals and human beings.
Geoarchaeological investigation of occupation deposits in Blombos Cave in South Africa indicate changes in site use and settlement dynamics in the southern Cape during MIS 5b-4

Abstract The archaeological assemblage recovered from the Middle Stone Age (MSA) levels in Blombos Cave, South Africa, is central to our understanding of the development of early modern humans. Here, we demonstrate that the cultural and technological innovations inferred from the Blombos Cave MSA record also correlate with significant shifts in site use and occupational intensity. Through a comprehensive geoarchaeological investigation of three MSA occupation phases, we identified distinct diachronic trends in the frequency of visits and the modes of occupation. During the earliest phases (ca. 88–82 ka), humans inhabited the cave for more extended periods, but cave visits were not frequent. During the later phases (ca. 77–72 ka), the cave was more regularly visited but for shorter periods each time. We argue that these changes in local occupational intensity, which also coincide with shifts in vegetation, sea levels, and subsistence, can best be explained by broader changes in hunter-gatherer mobility strategies and occupation patterns. Fundamental changes in regional settlement dynamics during Marine Oxygen Isotope Stages 5b-4 would have significantly affected the nature and frequency of social interaction within and between prehistoric populations living in the southern Cape, a scenario that ultimately may explain some of the social and technological advances that occurred there during this time frame.
Smartphones for public transport planning and recommendation in developing countries—A review

In this era of connected systems that have penetrated everywhere, transport units have become a significant source of data, collected from commuters, vehicles, drivers, or any section being touched by the transport system. These data, which have both spatial as well as temporal aspects, is utilized for a plethora of services like travel assistant systems, multi‐modal transport solutions, real‐time travel information, smart parking, autonomous vehicles, to name a few. With the current buzz of sustainable transport, the use of public transport systems have been popularized owing to the economic and environmental savings. In this review article, we provide a highlight of works, which have tried to utilize techniques to improve multiple sections of the public transport system, primarily focusing on developing economies, thus improving the overall commute experience at various countries.
Redox behavior of the model catalyst Pd/CeO2-x/Pt(111)

Photoelectron spectroscopy and scanning tunneling microscopy have been used to investigate how the oxidation state of Ce in CeO2-x(111) ultrathin films is influenced by the presence of Pd nanoparticles. Pd induces an increase in the concentration of Ce3+ cations, which is interpreted as charge transfer from Pd to CeO2-x(111) on the basis of DFT+U calculations. Charge transfer from Pd to Ce4+ is found to be energetically favorable even for individual Pd adatoms. These results have implications for our understanding of the redox behavior of ceria-based model catalyst systems.
Laser-Induced Forward Transfer of Organic LED Building Blocks Studied by Time-Resolved Shadowgraphy†

The patterned deposition of thin films is essential for many technological applications. One promising material deposition technique is laser-induced forward transfer (LIFT), where a thin layer coated on a transparent substrate is ablated by a laser pulse passing through the substrate. The ablated material is collected on a nearby receiver substrate in a pattern defined by the laser. The technique can be applied to heat and light sensitive materials, provided that they are not directly irradiated by the laser pulse. For this application, a sacrificial layer is introduced between the substrate and the transfer layer so that the laser energy is converted into mechanical propulsion while protecting the sensitive layer from radiation. In this work, the application of a triazene polymer as a sacrificial layer for LIFT has been studied with the final goal of transferring organic light-emitting diode (OLED) pixels. Donor films made of a stack of triazene polymer, metal, and optionally an electroluminescent polym.
Proline, Betaine, and Choline Responses to Different Phosphorus Levels in Green Bean

Proline, betaine, and choline are protector molecules, related with secondary metabolism, that protect cells against oxidative damage by reactive oxygen species. They are present in many organisms, including bacteria, fungi, and plants, in response to low water stress, salinity, availability of essential nutrients, diseases, and others abiotic stress. The objective of the present work was to determine the effect of phosphorus (P) (deficient, adequate, excessive, or toxic) levels on proline, betaine, and choline protectors in green bean plants (Phaseolus vulgaris L. cv. Strike) under intensive system crop conditions. Different P levels were applied to the nutrient solution: P1, 0.5 mM; P2, 1 mM; P3, 2 mM; P4, 4 mM; P5, 6 mM; and P6, 8 mM, with P3 considered the optimal. Treatment P3 caused the most important and significant increase on proline, betaine, and choline, with P6 and P1 (insufficient and toxic levels, respectively) registering the lowest concentrations. Plants do not react by increasing these compounds when P levels increase. On the other hand, the optimal P level (P3) enhanced the tolerance of compounds, which could elevating the plant tolerance as regards the lowest and toxic P treatments. Subsequently, an adequate P level enhances the presence of proline, betaine, and choline in green bean plants and consequently tolerance to stress.
Sentiment Analysis of Social Networking Data Using Categorized Dictionary

Sentiment analysis is the process of analyzing a person’s perception or belief about a particular subject matter. However, finding correct opinion or interest from multi-facet sentiment data is a tedious task. In this paper, a method to improve the sentiment accuracy by utilizing the concept of categorized dictionary for sentiment classification and analysis is proposed. A categorized dictionary is developed for the sentiment classification and further calculation of sentiment accuracy. The concept of categorized dictionary involves the creation of dictionaries for different categories making the comparisons specific. The categorized dictionary includes words defining the positive and negative sentiments related to the particular category. It is used by the mapper reducer algorithm for the classification of sentiments. The data is collected from social networking site and is pre-processed. Since the amount of data is enormous therefore a reliable open-source framework Hadoop is used for the implementation. Hadoop hosts various software utilities to inspect and process any type of big data. The comparative analysis presented in this paper proves the worthiness of the proposed method.
Volatility Modeling for Currency Pairs and Stock Indices by Means of Complex Networks

Financial markets are complex systems. Network analysis is an innovative method for improving data sharing and knowledge discovery in financial data. Oriented weighted networks were created for the Shanghai Composite, S&P500, DAX30, CAC40, Nikkei225, FTSE100, IBEX35 indexes, for CNY-JPY, EUR-USD, GBP-EUR, RUB-CNY and for cryptocurrency BTC-USD. We considered data since January 6, 2006 to September 6, 2019. The complex networks had a similar structure for both types of markets, which was divided into the central part (core) and the outer one (loops). The emergence of such a structure reflects the fact that, for the most part, the stock and currency markets develop around some significant state of volatility, but occasionally anomalies occur when the states of volatility deviate from the core. Comparing the topology of evolutionary networks and the differences found for the stock and currency markets networks, we can conclude that stock markets are characterized by a greater variety of volatility patterns than currency ones. At the same time, the cryptocurrency market network showed a special mechanism of volatility evolution compared to the currency and stock market networks.