Miracle-dz/UniFAR-FTUs huggingface dataset:
The preventive role of medical ozone therapy on remote organ injury induced by hepatic ischemia reperfusion

Aim: This study explores the effects of ozone therapy on the prevention of remote organ injury in rats with induced hepatic ischemia reperfusion injury.Materials and Methods: Twenty-one male Sprague Dawley rats were sorted randomly into three groups: (a) A control group in which the rats’ abdomens were operated on by laparotomy, and their livers then viewed and closed with a suture; (b) Rats with induced hepatic ischemia-reperfusion injuries; and (c) Rats induced with the same injuries that were administered ozone therapy before reperfusion. The rats’ hepatic arteries, portal veins, and bile ducts were clamped, and ischemia was induced for 45 min. Reperfusion was provided for 90 min in the second and third groups. The third group was administered 0.5 mg/kg ozone intraperitoneally before reperfusion. Liver, lung, and kidney tissues were taken for biochemical and histopathological examinations.Results: In the second group, malondialdehyde levels in the lung and kidney tissues were higher than in the control group, while catalase and superoxide dismutase enzyme levels were lower. The third group had lower malondialdehyde levels and higher catalase and superoxide dismutase enzyme levels than the group that did not receive the therapy. In histopathological evaluations, the damage to both kidney and lung tissues in the third group was higher than in the control group; however, this damage was significantly lower than in the second group.Conclusions: The findings indicated that the administration of ozone therapy attenuated lung and kidney injuries caused by hepatic ischemia, since partial protection was demonstrated in many instances.
Re-domestication of Internet Technologies: Digital Exclusion or Digital Choice?

Internet access is now characterized by multi-device, mobile, and ubiquitous access. We explore the changing nature of internet access by focusing on social practices that shape the position and role of internet technologies in everyday internet use. Drawing on the domestication framework, the study uses data from qualitative interviews with UK internet users to explore how technologies are re-domesticated. Three practices encompassing how internet users develop and maintain internet access were identified: spotlighting, distributing, and making do. In addition, orientation, understanding, play, and communication internet dependencies were examined to determine how individuals relate to internet technologies. The practices of re-domestication reflect differences in the role that internet technologies play in individuals’ daily lives, and differences in the availability of offline resources. The study contributes to our understanding of the mechanisms underlying the development and maintenance of internet access, depending on whether access arrangements are shaped by digital exclusion or choice. Lay Summary: As internet access becomes more complex, it is important to understand how people interact with the various internet technologies they use. Theoretically, the concept of re-domestication suggests that the meanings, roles, and uses of old technologies can shift as new technologies are adopted. The concept of internet centrality, which includes orientation, understanding, play, and communication dependencies, illustrates the role of internet technologies in individuals’ daily lives. The study draws on 29 qualitative interviews with UK internet users. Three distinct practices of re-domestication were identified: “spotlighting,” where one device becomes the predominant way people go online; “distributing,” which involves access where different devices are used and the choice of a particular device depends on the contextual factors of internet use; and “making do,” where users struggle to maintain internet access, resulting in access being restricted. In addition, the analysis of internet centrality showed that different re-domestication practices also reflect differences in what role internet technologies play in individuals’ daily lives: Users who engaged in spotlighting or making do practices were more inclined to value the internet for relaxation and pastime (play dependency), whereas those who engaged in distributing practices were more inclined to value the internet for meaning making (understanding dependency).
Does Proximity to Activity-Inducing Facilities Explain Lower Rates of Physical Activity by Low-Income and Minority Populations?

As in the rest of the nation, low-income and minority populations in New Jersey have higher rates of obesity and lower rates of participation in physical activity. This study examined whether a lower level of geographic proximity to activity-inducing infrastructure and facilities, including bicycling routes and gymnasiums, could be a reason for lower rates of participation in physical activity for New Jersey minority populations. Results of past studies revealed that proximity to activity-inducing facilities was generally associated with greater participation in physical activity for the general population. Some study results showed that low-income and minority populations had a lower level of geographic proximity to such facilities. Other studies indicated that proximity to facilities might not have influenced their participation in physical activity to the same extent as the general population. This study made a statewide assessment of proximity to existing fitness facilities, existing bicycling facilities, and programmed bicycling and pedestrian projects in New Jersey. One-way analysis of variance was used to examine if proximity to activity-inducing facilities was lower for low-income and minority populations. Analysis was carried out at the census block group and municipal levels. The results provided no evidence that low-income and minority populations had a lower level of geographic proximity to activity-inducing facilities. The analysis also showed that programmed bicycling and pedestrian projects were favorably located for these populations. The study concluded that the lower rates of participation of low-income and minority populations in New Jersey were caused by behavioral factors rather than proximity to facilities.
Synthesis of Gd2Zr2O7 Coatings Using the Novel Reactive PS-PVD Process

Ceramic topcoats of thermal barrier coatings (TBCs) make it possible to increase the working temperature of the hot sections of jet engines. Yttria-stabilized zirconia oxide (YSZ) is usually used to protect the turbine blades and vanes against high temperature and oxidation. It is necessary to develop new materials which can operate at higher temperatures in a highly oxidizing gas atmosphere. Re2Zr2O7-type pyrochlores are promising YSZ replacements. Usually, they are produced by mixing pure oxides in the calcination process at higher temperatures. In a recent article, the new concept of pyrochlore synthesis during the deposition process was presented. The new technology, called reactive plasma spray physical vapor deposition (reactive PS-PVD), was developed and a Gd2Zr2O7 (GZO) coating was achieved. The reactive PS-PVD process allowed for the use of a mixture of untreated ZrO2 and Gd2O3 powders as reactants, instead of the commercially available gadolinium zirconate powders used in other types of processes. The results of microstructure observations revealed a columnar microstructure in the produced ceramic layer. The phase composition indicated the presence of gadolinium zirconate. Thermal analysis showed a decrease in the thermal conductivity in the range of 700 to 1200 °C of the produced layers, as compared to the layer made of the currently used conventional YSZ.
Dynamic stall control by periodic excitation, Part 1: NACA 0015 parametric study

A parametric study was undertaken to investigate the effect of periodic excitation (with zero net mass e ux ) on a NACA0015airfoilundergoingpitchoscillationsatrotorcraftreducedfrequenciesunderincompressibleconditions. Theprimaryobjectiveofthestudywastomaximizeairfoilperformancewhilelimitingmomentexcursionstotypical prestalled conditions. The incidence angle excursions were limited to § 5 deg, and a wide range of reduced excitation frequencies and amplitudes were considered for 0 :33 10 6 < ‐ Re <‐ 0:93 10 6 with various e ap dee ections and excitation locations. Signie cant increases in maximum lift and reductions in drag were attained while containing themomentexcursions. Oscillatoryexcitation wasfoundto befarsuperiortosteadyblowing,which wasevendetrimental under certain conditions, and e ap-shoulder excitation was found to be superior to leading-edge excitation.
Impact of Outdoor Temperature Variations on Thermal State in Experiments Using Immersive Virtual Environment

Recent studies have established immersive virtual environments (IVEs) as promising tools for studying human thermal states and human–building interactions. One advantage of using immersive virtual environments is that experiments or data collection can be conducted at any time of the year. However, previous studies have confirmed the potential impact of outdoor temperature variations, such as seasonal variations on human thermal sensation. To the best of our knowledge, no study has looked into the potential impact of variations in outdoor temperatures on experiments using IVE. Thus, this study aimed to determine if different outdoor temperature conditions affected the thermal states in experiments using IVEs. Experiments were conducted using a head mounted display (HMD) in a climate chamber, and the data was analyzed under three temperature ranges. A total of seventy-two people participated in the experiments conducted in two contrasting outdoor temperature conditions, i.e., cold and warm outdoor conditions. The in situ experiments conducted in two cases, i.e., cooling in warm outdoor conditions and heating in cold outdoor conditions, were used as a baseline. The baseline in-situ experiments were then compared with the IVE experiments conducted in four cases, i.e., cooling in warm and cold outdoor conditions and heating in warm and cold outdoor conditions. The selection of cooling in cold outdoor conditions and heating in warm outdoor conditions for IVE experiments is particularly for studying the impact of outdoor temperature variations. Results showed that under the experimental and outdoor temperature conditions, outdoor temperature variations in most cases did not impact the results of IVE experiments, i.e., IVE experiments can replicate a temperature environment for participants compared to the ones in the in situ experiments. In addition, the participant’s thermal sensation vote was found to be a reliable indicator between IVE and in situ settings in all studied conditions. A few significantly different cases were related to thermal comfort, thermal acceptability, and overall skin temperature.
Mesoporous Carbon Production by Nanocasting Technique Using Boehmite as a Template

A series of mesoporous carbonaceous materials were synthesized by the nanocasting technique using boehmite as a template and glucose as a carbon precursor. After pyrolysis and template removal, the resulting material is a mesoporous carbon that can be additionally doped with N, B and K during prepyrolysis impregnation. In addition, the influence of doping on the morphology, crystallinity and stability of the synthesized carbons was studied using X-ray diffraction, nitrogen physisorption, thermogravimetry, Raman and IR spectroscopy and transmission electron microscopy. While the nanocasting process is effective for the formation of mesopores, KOH and urea do not modify the textural properties of carbon. The use of H3PO4 as a dopant, however, led to the formation of an AlPO4 compound and resulted in a solid with a lower specific surface area and higher microporosity. All doped solids present higher thermal stability as a positive effect of the introduction of heteroatoms to the carbon skeleton. The phosphorus-doped sample has better oxidation resistance, with a combustion temperature 120–150 °C higher than those observed for the other materials.
Notch Toughness of Internationally Produced Hollow Structural Sections

Since the Northridge and Kobe earthquakes in the 1990s, with their numerous brittle fractures of steel members and welded connections, there is much more awareness of material notch toughness for all applications where dynamic loading is a design condition. As a result, there has been renewed attention directed at assessment of the notch toughness of steel sections, along with tightening of requirements for welding consumables in welded joints. This paper reports on the Charpy V-Notch (CVN) toughness of contemporary hollow structural sections (HSS) manufactured by companies in North America, South America, and Europe. The hollow sections were produced as: hot-formed HSS; cold-formed HSS (electric resistance welded); and cold-formed plus stress-relieved HSS (electric resistance welded). Also, the range of parameters covered in the experimental study included specimen orientation (longitudinal versus transverse), cross-section location (flats, corner, and weld seam), and face exposure (interior face of tube versus exterior face). In total, 557 CVN specimens have been impact tested.
The Periodontal Status of Pregnant and Lactating Women in Ilam Province, Iran (2018 - 2019)

Background: Gingivitis and periodontitis cause the inflammation of the soft tissue around the teeth and destroy the supporting structures of the teeth. This is highly prevalent during pregnancy and lactation. Objectives: The present study aimed to investigate the periodontal status in pregnant and lactating women in Ilam province, Iran in 2018 - 2019. Methods: This descriptive-analytical study was conducted on 100 pregnant and lactating women who were selected via cluster and stratified sampling. Data were collected using a demographic questionnaire and the community periodontal index of treatment needs (CPITN). Data analysis was performed in SPSS version 24 using independent t-test, chi-square, and one-way ANOVA at the significance level of 0.05. Results: The mean age of the pregnant and lactating women was 25.62 ± 5.52 and 29.08 ± 6.83 years, respectively. In total, 30% of the pregnant women had a healthy gingival, 18% had bleeding, 36% had a mass, and 16% had CPITN. As for the lactating women, 44% had a healthy gingival, 32% had bleeding, 20% had a mass, and 4% had an envelope. CPITN index II and III were significantly higher in the pregnant women compared to the lactating women. Among the pregnant women, there were 49 housewives and only one employee, while 50 of the lactating women were housewives. Conclusions: According to the results, the sample population had an unfavorable periodontal status, and the pregnant women needed more oral health education.
The Role of Free‐Tropospheric Moisture Convergence for Summertime Heavy Rainfall in Western Japan

The role of vertically integrated water vapor flux convergence (IVFC) in heavy rainfall events in western Japan is investigated by dividing the atmosphere into a boundary layer and free troposphere using the Japan Meteorological Agency's mesoscale gridded analysis product and reanalysis product. Rainfall events are defined by peaks of area‐averaged precipitation. The results show an increase in the free‐tropospheric IVFC more than 15 h before rainfall events, contributing to atmosphere moistening. This preceding moistening is favorable for mesoscale convective systems (MCSs) with slantwise ascending deep inflow layers (layer lifting) that produce large precipitation amounts. Appearance frequency of the moist absolutely unstable layer (MAUL) increases around the precipitation peak times, which is especially notable for larger peaks. These results indicate that the free‐tropospheric IVFC contributes to heavy rainfall in western Japan by providing environments favorable for producing and maintaining MAUL, enhancing the organization of MCSs.
Simulation of a Duffing oscillator for broadband piezoelectric energy harvesting

Vibration energy harvesters are usually resonant mechanical systems working at resonance. The subsequent mechanical amplification results in output powers multiplied by the mechanical quality factor when compared to non-resonant systems. The main drawback is the difficulty of matching a given vibration frequency range to the energy harvester’s resonance frequency. Among several techniques, the use of nonlinear mechanical resonators was proposed in several studies for enlarging energy harvester power bandwidth. In addition, microelectromechanical systems become nonlinear when driven even at moderate levels due to their small size. This paper is devoted to a theoretical study of a Duffing oscillator exhibiting piezoelectric electromechanical coupling. After presenting the dimensionless model, it is solved both in the frequency domain and in the time domain. The frequency-domain simulations show that a huge gain in bandwidth is possible when the resonator is highly nonlinear. Special attention has been paid to the influence of electromechanical coupling. However, this encouraging result is counterbalanced by the difficulty to make the resonator reach high level vibration. Indeed, the Duffing oscillator exhibits a frequency range where two harmonic solutions are possible. When excited with sine bursts or colored noise, the oscillator remains most of the time on the lowest solution. From simulations in the time domain, it is shown that fast burst perturbation (FBP) applied to the piezoelectric voltage may induce the jump from lowest solution to highest solution. Consequently a huge gain may be expected in output power. Finally, the resonator is excited with colored noise and the previously developed strategy is applied. Once again, the mean output power may be greatly enhanced.
The Perceived Satisfaction in Utilizing Learning Management System among Engineering Students during the COVID-19 Pandemic: Integrating Task Technology Fit and Extended Technology Acceptance Model

Online education has become the norm for higher education institutions (HEIs) during this COVID-19 pandemics. HEIs are required to implement a fully online learning system that is structured and readily accessible with the assistance of a learning management system (LMS), including in developing countries such as the Philippines. This study aims to assess factors that positively influence the perceived satisfaction of engineering students when using the LMS during the COVID-19 pandemic in the Philippines. Additionally, it aims to integrate two models: Task Technology Fit (TTF) and Technology Acceptance Model (TAM), with added variables such as the content of the learning management system, social presence, and social space. Upon deploying the convenience sampling, a total of 1011 engineering students responded in the online survey, which consisted of 81 questions. Structural equation modeling (SEM) showed that the Task Technology Fit was positively influenced by technology, individual, and task characteristics. Moreover, behavioral intention to use LMS was positively influenced by perceived usefulness and perceived ease of use. Furthermore, Task Technology Fit had a significant direct effect on behavioral intention to use LMS, which subsequently led to perceived satisfaction. This study is among the first to explore factors affecting perceived satisfaction among engineering students in using the LMS in the Philippines during the COVID-19 pandemic. To evaluate the perceived satisfaction of students in using the learning management system, future works can be extended and the model can be applied in other countries.
Ascent Trajectories of Hypersonic Aircraft: Operability Limits Due to Engine Unstart

A generic waverider-type hypersonic aircraft that undergoes an ascent trajectory has been modeled using a first-principles reduced-order model. Two types of operability limits are added that represent boundaries on the aircraft trajectory map (of vehicle altitude versus Mach number). These boundaries are associated with engine unstart and ram–scram transition. The predicted unstart boundary is to be avoided; the ram–scram transition is a condition through which the aircraft must fly, but it is useful for the control system to know when this transition is approached to account for possible sudden changes in thrust and moments. The model shows that unstart occurs if the aircraft flies too high, too slow, or at too great of an acceleration. The unstart limit can be avoided by selecting a trajectory having sufficiently large dynamic pressure or a low vehicle acceleration. Optimizing these factors avoids an excessive value of the fuel–air ratio that is required for trim. The model also identifies an engine inl.
CONOCIMIENTO TECNOLÓGICO, PEDAGÓGICO Y DISCIPLINARIO DEL PROFESORADO: EL CASO DE UN CENTRO EDUCATIVO INTELIGENTE TECHNOLOGICAL, PEDAGOGICAL AND DISCIPLINARY KNOWLEDGE OWNED BY TEACHERS: THE CASE OF AN INTELLIGENT EDUCATIONAL CENTER

The present paper has as its main purpose to analyze ICT integration within a specific learning environment: a public center located in Alicante and catalogued as an ‘Intelligent Educational Center’ (CEI, for its initials in Spanish), according to the homonymous piloting plan designed by the Valencian Autonomous Region (Spain). A mixed research work based on the TPACK model was used to perform a thorough study of technological, pedagogical and disciplinary knowledge. Surveys based on questionnaires and interviews along with discussion groups were our assessment tools. Among the results obtained stands out the verification of the teaching staff’s insecurity when it comes to the practical application of technological and pedagogical knowledge in their classes –even though the research was carried out in a CEI. The paradox created by the sharp contrast between that widespread perception among the teaching staff and the completely different view which prevails among school management teams has equally received special attention in our paper.
Forest classification using synthetic GF-1/WFV time series and phenological parameters

Abstract. High-accuracy forest type mapping is crucial for forest resource inventory to support forest management, conservation biology, and ecological restoration. The Chinese GF-1 satellite can provide high-spatial resolution and low-cost data for forestry monitoring. However, it is difficult to obtain time-series GF-1 images with high spatial resolution and high temporal frequency because of technical constraints and cloud contamination, which affects the accuracy of forest type extraction. We proposed a method for mapping forest type using Chinese GF-1/widefield view (WFV) multi-spectral data, the fused GF-1/WFV normalized difference vegetation index (NDVI) time series, and the phenological parameters. We used the enhanced spatial and temporal adaptive reflectance fusion model algorithm to fuse Chinese GF-1/WFV and Moderate Resolution Imaging Spectroradiometer NDVI to generate high-spatiotemporal resolution NDVI time-series image data and extract phenological parameters in the northeastern part of Hubei Province, China. We then designed four different combinations of GF-1/WFV spectral features, the fused NDVI time-series features, and the phenological parameters. Finally, a random forest algorithm is used to classify forest types in the study area. The results showed that the proposed method can obtain satisfactory results. The overall accuracy based on the combination of GF-1/WFV spectral features, high-resolution time-series NDVI, and phenological features was 89.68%. Compared with the classification using only GF-1/WFV spectral data, the overall accuracy was improved by 9.60% points. These results demonstrate that the proposed method can support forest type survey and mapping at the regional or global scale.