Miracle-dz/UniFAR-FTUs huggingface dataset:
Twitter and Affective Polarisation: Following Political Leaders in Spain

ABSTRACT The present study addresses the effect of the discourse of elites on Twitter on citizens’ affective polarisation through a quasi-experiment that was embedded in a survey panel. Participants were invited to follow one of the Twitter accounts of nine candidates from the main political parties during the 2019 European Parliament electoral campaign in Spain. Experiment compliance among participants was confirmed using web-tracking data (passive metre). The results show that exposure to candidates’ Twitter accounts by self-selection does not increase affective polarisation. Although high levels of polarisation might contribute to building echo chambers, the polarising content contained in the partisan Twitter accounts has no effect on increasing affective polarisation, even among those who strongly identify with such parties. This finding confirms the so-called limited media effect hypothesis for social media.
PENGARUH LINGKUNGAN KELUARGA, KEDISIPLINAN SISWA, DAN MOTIVASI BELAJAR TERHADAP HASIL BELAJAR EKONOMI SISWA DI SMA NEGERI 7 SURABAYA

This study aims to: analyze the influence of family environment on learning outcomes at economics lesson of students in high school economics Negeri 7 Surabaya, analyze the influence of students dicipline on learning outcomes in economics lesson of student at SMAN 7 Surabaya, analyze the influence of learning motivation on learning outcomes in economics lesson of student at SMAN 7 Surabaya, and also the impact of family environment, students dicipline and learning motivation at the same time on the learning outcomes on economics lesson of student at SMAN 7 Surabaya. This research is quantitative. The population in this research were students of class X and class XI IPS at SMA Negeri 7 Surabaya year 2014-2015 as many as 228 students, while the number of samples used as much as 145 students. The data collection techniques that used are questionnaires, interviews, and documentation. Methods of analysis using multiple linear regression techniques. The results showed that : there is a significant and positive effect between family environment on learning outcomes in economics lesson of student at SMAN 7 Surabaya, a significant and positive effect between students dicipline on learning outcomes in economics lesson of student at SMAN 7 Surabaya, a significant and positive effect between learning motivation on learning outcomes in economics lesson of student at SMAN 7 Surabaya, and a significant and positive relations between family environment, student discipline and learning motivation jointly toward learning outcomes on economics lesson of students at SMAN 7 Surabaya
Wideband Doherty Power Amplifier: A Design Approach

This paper presents a simple method to design wideband Doherty power amplifiers (DPAs) based on the synthesis of a combiner network which can mimic the response of an ideal compensation of the device reactive output equivalent network and exploit the maximum power capabilities of the device. Using the Wolfspeed’s CGH40006 and CG2H40025 GaN HEMT devices, two DPAs were designed and simulated to demonstrate the effectiveness of the proposed approach. In both cases, a 1.4 GHz bandwidth was obtained together with an efficiency higher than 44 and 49% at 6 dB OBO. The saturated output power was higher than 41.2 and 47 dBm over the band, for the DPAs using the CGH40006 and CG2H40025 devices, respectively.
Formation and Performance of Diamond (111)/ Cu Interface from First-Principles Calculation

: The interface formation and properties of composite materials are very important for the preparation of composite materials, and the bonding state and charge transfer between atoms in the interface have a particularly signiﬁcant effect on the interface formation. In this work, the ﬁrst-principles calculation method was used to study the adsorption behavior and molecular dynamics of copper atoms on the (111) surface of H-terminated diamond, and the adsorption energy and adhesion work of Cu atoms were calculated. The results show that the adsorption of copper atoms is not sensitive to the diamond (111) surface, the adsorption work is very small at the four high symmetry positions, and the adhesion work is the largest at the T4 position and is 0.6106 J/m 2 . Furthermore, according to the electron localization function (ELF) analysis, there is no compound formation between Cu and H atoms; only a small amount of charge transfer exists, which belongs to physical adsorption. The diamond–copper interface formed by the growth of adsorption sites is a metastable structure without energy stability. This work provides an important theoretical reference for understanding the formation mechanism of copper-based diamond composites. with the properties of the Cu atoms belonging to d-state metals. The upper end of the H atom on the diamond (111) surface shows a light yellow color, indicating that the electrons in the C-H bonds have deviated, which also proves that the C–H bonds on the diamond (111) surface are polar bonds. The fundamental reason is that the electronegativities of H atoms and C atoms are different. In contrast, electrons on C–C bonds in diamond exhibit an approximate electron gas distribution.
Structure/Function Analysis of Truncated Amino-Terminal ACE2 Peptide Analogs That Bind to SARS-CoV-2 Spike Glycoprotein

The global burden of the SARS-CoV-2 pandemic is thought to result from a high viral transmission rate. Here, we consider mechanisms that influence host cell–virus binding between the SARS-CoV-2 spike glycoprotein (SPG) and the human angiotensin-converting enzyme 2 (ACE2) with a series of peptides designed to mimic key ACE2 hot spots through adopting a helical conformation analogous to the N-terminal α1 helix of ACE2, the region experimentally shown to bind to the SARS-CoV-2 receptor-binding domain (RBD). The approach examines putative structure/function relations by assessing SPG binding affinity with surface plasmon resonance (SPR). A cyclic peptide (c[KFNHEAEDLFEKLM]) was characterized in an α-helical conformation with micromolar affinity (KD = 500 µM) to the SPG. Thus, stabilizing the helical structure of the 14-mer through cyclization improves binding to SPG by an order of magnitude. In addition, end-group peptide analog modifications and residue substitutions mediate SPG binding, with net charge playing an apparent role. Therefore, we surveyed reported viral variants, and a correlation of increased positive charge with increased virulence lends support to the hypothesis that charge is relevant to enhanced viral fusion. Overall, the structure/function relationship informs the importance of conformation and charge for virus-binding analog design.
Structure of the Western Jaz Murian Forearc Basin, Southeast Iran, Revealed by Autocorrelation and Polarization Analysis of Teleseismic P and S Waves

The Jaz Murian Basin in Southeast Iran is a forearc basin that sits on top of the western Makran subduction zone. A recent seismic deployment inside the western Jaz Murian Basin documents extremely strong reverberations between the free surface and the top of the basement. These strong multiples, which hamper studies of deeper structures, carry precious information on the structure of the basin. Here we combine three independent measurements, including teleseismic P/S‐wave coda autocorrelations, P‐wave polarization analysis and receiver functions, to image the architecture of the western Jaz Murian Basin. The S‐wave velocity structure beneath each station is constrained by teleseismic P‐wave polarization analysis and a simple grid search method. In addition, both P‐ and S‐wave reflections are extracted to measure the Poisson's ratio and the thickness of sediments, in addition to P‐ and/or S‐wave velocities. We find that the sedimentary cover has an average thickness of ∼3 km with very low S‐wave velocities around 1.2 km/s. The estimated Vp/Vs ratios are relatively high between 2.23 and 2.52, suggesting that the western Jaz Murian Basin contains unconsolidated recently deposited sediments.
Fused-Filament Fabrication of Short Carbon Fiber-Reinforced Polyamide: Parameter Optimization for Improved Performance under Uniaxial Tensile Loading

This study intends to contribute to the state of the art of Fused-Filament Fabrication (FFF) of short-fiber-reinforced polyamides by optimizing process parameters to improve the performance of printed parts under uniaxial tensile loading. This was performed using two different approaches: a more traditional 2k full factorial design of experiments (DoE) and multiple polynomial regression using an algorithm implementing machine learning (ML) principles such as train-test split and cross-validation. Evaluated parameters included extrusion and printing bed temperatures, layer height and printing speed. It was concluded that when exposed to new observations, the ML-based model predicted the response with higher accuracy. However, the DoE fared slightly better at predicting observations where higher response values were expected, including the optimal solution, which reached an UTS of 117.1 ± 5.7 MPa. Moreover, there was an important correlation between process parameters and the response. Layer height and printing bed temperatures were considered the most influential parameters, while extrusion temperature and printing speed had a lower influence on the outcome. The general influence of parameters on the response was correlated with the degree of interlayer cohesion, which in turn affected the mechanical performance of the 3D-printed specimens.
Trial-Period Technostress: A Conceptual Definition and Mixed-Methods Investigation

Application abstract: A large number of electronic devices are rejected and returned to the seller in the first weeks of trial use, which costs organizations millions of dollars. We aimed to identify the causes behind those returns and find that stress during the trial period is a major contributing factor. Users are stressed as they need to learn how to use the electronic device, integrate it into their daily life, and take care of privacy issues. All that creates stress and makes users feel unhappy with using the electronic device so that they will send it back to the seller. In particular, we see in our results that individuals who are not innovative in using IT in general and have a low willingness to learn using the new electronic device tend to send back electronic devices in the first weeks of the trial period. When discussing those results with individuals who had sent back tablet devices, we see that stress in the trial period can even overwhelm positive thoughts. So, with our results, we conclude that stress in the trial period has many causes that are often responsible for returning electronic devices.
The combined effects of thermal environment and ventilation rate on productivity

SUMMARY A subjective experiment was conducted to examine the combined effect of thermal environment and ventilation rate on human responses and its possible consequences on performance. The conditions of the experiment were the combination of thermal environment: operative temperature of 25.5°C and 28.5°C; and the ventilation rate: 3L/s·p and 25L/s·p. Eleven subjects participated in a 350-minutes exposure and worked on six sessions of threedigit multiplication tasks. The percentage of dissatisfied was higher in the higher temperatures and in the lower ventilation rates. The performance of the task was not significantly different among the conditions. The accumulation of fatigue was more in the higher temperature condition. Strong correlation between the percentage of dissatisfied derived from perceived air quality and the fatigue level was obtained. The relationships of the task performance and the satisfaction vote of the indoor environment and the level of fatigue were obtained.
A Multi-User Cost-Efficient Crowd-Assisted VR Content Delivery Solution in 5G-and-Beyond Heterogeneous Networks

The latest evolution of wireless communications enables users to access rich Virtual Reality (VR) services via the Internet, including while on the move. However, providing a premium immersive experience for the massive number of concurrent users with various device configurations is a significant challenge due to the ultra-high data rate and ultra-low delay requirements of VR livecast services. This paper introduces an innovative <underline>m</underline>ulti-user cost-<underline>e</underline>fficient <underline>c</underline>rowd-assisted <underline>d</underline>elivery and <underline>c</underline>omputing (MEC-DC) framework, which leverages mobile edge computing and end-user resources to support high performance VR content delivery over 5G-and-beyond heterogeneous networks (5G-HetNets). The proposed MEC-DC framework is based on three main solutions. First is a novel <underline>b</underline>uffer-<underline>n</underline>adir-based <underline>m</underline>ulticast (BNM) mechanism for VR transmissions over 5G-HetNets. BNM ensures smooth and synchronized user viewing experiences by maximizing the average playback buffer-nadir of all participants with stochastic optimization. Second and third are practical distributed algorithms: the cost-efficient <underline>m</underline>ulticast-<underline>a</underline>ware <underline>t</underline>ranscoding <underline>o</underline>ffloading (MATO) and <underline>c</underline>rowd-<underline>a</underline>ssisted <underline>d</underline>elivery algorithm (CAD) which optimize jointly multicast delivery and video transcoding. The algorithms’ optimality and complexity were investigated. The proposed MATO-CAD solution was evaluated with real datasets, trace-driven numerical simulations, and prototype-based experiments. The trace-driven experimental results showed how the proposed solution provides 18% throughput improvement, the lowest delay, and the best playback freeze ratio in comparison with three other state-of-the-art solutions.
Cortical Oxygenation during a Motor Task to Evaluate Recovery in Subacute Stroke Patients: A Study with Near-Infrared Spectroscopy

In subacute stroke patients we studied cortical oxygenation changes by near-infrared spectroscopy (NIRS) during a motor task performed with the hemiparetic arm (15 s of reaching and grasping, 45 s of rest, repeated 6 times). Twenty-three subjects were included at baseline, compared with six healthy subjects, and restudied after 6 weeks of rehabilitation. Motor/premotor cortical changes in oxyhemoglobin detected by NIRS were quantified as the area under the curve (AUC) for the total cortex (TOT-AUC) and for both affected (AFF-AUC) and unaffected hemispheres (UN-AUC). The ratio between AUC and the number of task repetitions performed identified the cortical metabolic cost (CMC) or the oxygenation increase for a single movement. Fugl–Meyer assessment of the upper extremity (FMA-UE) was also performed. At baseline, both total and hemispheric CMC were significantly higher in stroke patients than in healthy subjects and inversely correlated with FMA-UE. After rehabilitation, changes in total-CMC and unaffected-CMC, but not Affected-CMC, were inversely correlated with variations in the FMA-UE score. A value > 5000 a.u. for the ratio baseline TOT-CMC/days since stroke was associated with not reaching the clinically important difference for FMA-UE after rehabilitation. In subacute stroke the CMC, a biomarker assessed by NIRS during a motor task with the hemiparetic arm, may describe cortical time/treatment reorganization and favor patient selection for rehabilitation.
Impacts of Sub‐Grid Topographic Representations on Surface Energy Balance and Boundary Conditions in the E3SM Land Model: A Case Study in Sierra Nevada

Sub‐grid topographic heterogeneity has large impacts on surface energy balance and land‐atmosphere interactions. However, the impacts of representing sub‐grid topographic effects in land surface models (LSMs) on surface energy balance and boundary conditions remain unclear. This study analyzed and evaluated the impacts of sub‐grid topographic representations on surface energy balance, turbulent heat flux, and scalar (co‐)variances in the Energy Exascale Earth System Model (E3SM) land model (ELM). Three sub‐grid topographic representations in ELM were compared: (a) the default sub‐grid structure (D), (b) the recently developed sub‐grid topographic structure (T), and (c) high spatial resolution (1KM). Additionally, two different solar radiation schemes in ELM were compared: (a) the default plane‐parallel radiative transfer scheme (PP) and (b) the parameterization scheme (TOP) that accounts for sub‐grid topographic effects on solar radiation. A series of offline simulations with the three grid discretization structures (D, T, and 1KM) and two schemes of solar radiation (TOP and PP) were carried out using the Sierra Nevada, California. 1KM simulations with TOP well capture the spatial heterogeneity of surface fluxes compared to Moderate Resolution Imaging Spectroradiometer remote sensing data. There are significant differences between TOP and PP in the 1‐km simulated surface energy balance, but the differences in mean values and standard deviations become small when aggregated to the grid scale (i.e., 0.5°). The T configuration better mimics the 1KM simulations with TOP than the D configuration and better captures the sub‐grid topographic effects on surface energy balance and boundary conditions. These results underline the importance of representing sub‐grid topographic heterogeneities in LSMs and motivate future research to understand the sub‐grid topographic effects on land‐atmosphere interactions over mountainous areas.
Evaluating the Effects of Open Shelters on Limestone Deterioration at Archaeological Sites in Different Climatic Locations

ABSTRACT Open shelters have been proposed as suitable preservation strategies for a variety of heritage sites. However, no concerted attempt has yet been made to analyze their performance in a range of climatic conditions. This study aims to quantify limestone deterioration outside and inside the shelters at two archaeological sites, Hagar Qim (Malta) and the Bishop’s Palace (England), to obtain information on their impact. A simple methodology based on exposure trials and non-destructive tests was used. Globigerina limestone blocks were exposed at both sites from July 2013 to July 2014. Changes in appearance, weight, hardness, color, and moisture content of the blocks in addition to temperature and the likelihood of NaCl crystallization and freeze-thaw events were assessed over the year. This research shows that while deterioration rate is reduced as microclimatic conditions are moderated, open shelters do not completely prevent limestone deterioration at either site, especially in relation to salt weathering.
DISTILLERY WASTES TO LACTIC ACID: BIOREFINERY APPROACH DESTILERIJSKI OTPAD ZA PROIZVODNJU MLEČNE KISELINE I STOČNE HRANE: BIORAFINERIJSKI PRISTUP

The cost of distillery wastewater treatment is an important issue in overall economy of bioethanol production. Besides traditional utilization of distillery wastewater or stillage in animal nutrition, its chemical complexity is offering other possibilities. Complete distillery wastewater and liquid stillage from bioethanol production were studied as substrates for batch, fed-batch and repeated batch lactic acid fermentation by Lactobacillus rhamnosus ATCC 7469 for parallel production of lactic acid, probiotics and feed. Both of the substrates, liquid stillage and complete stillage enabled effective production of lactic acid with the process productivity of approximately 1.80 g h -1 L -1 , however utilization of the remains was different. The first strategy enabled conversion of liquid distillery wastewater into lactic acid and high value feed additive with zeolite immobilized probiotic biomass. The second strategy enabled effective lactic acid production on the complete stillage with additional production of high quality fermented feed for monogastric animals. REZIME Troskovi tretmana destilerijske otpadne vode znacajno uticu na ukupnu cenu proizvodnje bioetanola. Pored tradicionalne upotrebe destilerijske otpadne vode ili džibre u ishrani stoke, složeni hemijski sastav džibre pruža i alternativne mogucnosti iskoriscenja. Kompletna destilerijska džibra iz proizvodnje bioetanola na otpadnom hlebu je koriscena kao supstrat za mlecno-kiselinsku fermentaciju pomocu Lactobacillus rhamnosus ATCC 7469 u cilju proizvodnje mlecne kiseline, probiotika i stocne hrane. Koncentracija mlecne kiseline, broj živih celija i koncentracija redukujucih secera su praceni u toku fermentacije. Mlecno-kiselinska fermentacija tecnog dela destilerijske džibre je izvođena saržno sa slobodnim i imobilisanim biokatalizatorom i takođe saržno sa recikulacijom pomocu imobilisane biomase na zeolitu. U mlecno-kiselinskoj fermentaciji cele dibre postignuta je visoka koncentracija mlecne kiseline dok je fermentisani cvrst ostatak džibre pokazao adekvatna svojstva za upotrebu u ishrani monogastricnih životinja. Obe vrste supstrata, tecni deo džibre i kompletna džibra omogucavaju efikasnu proizvodnju mlecne kiseline sa produktivnoscu od oko 1,80 g L -1 h -1 , ali nastaju razliciti sporedni proizvodi. Prva strategija omogucava koriscenje tecnog dela džibre za proizvodnju mlecne kiseline i vrednog probiotskog dodatka ishrani životinja (sa brojem živih celija od preko 10 10 CFU ml -1 ) uz mogucnost iskoriscenja zaostalog nefermentisanog dela džibre za proizvodnju stocne hrane. Druga strategija podrazumeva fermentaciju cele džibre u kojoj paralelno nastaju mlecna kiselina i fermentisani cvrsti ostatak kao visoko vredna hrana za monogastricne životinje. U oba procesa nije bilo potrebno obogacivati džibru ni sa mineralima ni sa skupim izvorima azota. Kljucne reci: mlecno-kiselinska fermentacija, džibra, stocna hrana, probiotici, biorafinerijski pristup.
What's eating cruise ship employees: exploring dimensions of engagement

ABSTRACT Purpose: The purpose of this paper is to assess the dimensions of employee engagement of a crusie ship work force. Design/Methods/Approach: This study is based on qualitative research and as such is associated with the nomothetic (associated with the law) explanation. Employees were asked questions from a questionnaire which covered the dimensions of engagement on the basis of existing scientific literature. Findings: Observing employee engagement on a cruise ship, this study showed that Communication and progress, Capacity to engage, Engaged behaviour and Trust and feeling of freedom are dimensions that have influence on the employee engagement of a cruise ship work force. Research limitations: The generalisation of the findings is limited and it is not possible to derive a general conclusion due to the sample profile (single cruise company). Originality/value: This research, in the author's best knowledge, is a pioneering work. So, further testing and improvement is necessary.