Miracle-dz/UniFAR-FTUs huggingface dataset:
Role of Water Molecules in Enhancing the Proton Conductivity on Reduced Graphene Oxide under High Humidity

Reduced graphene oxide (rGO) films can be utilized as a solid proton conductor due to their good in-plane proton conductivity under humid condition. We devise the series of water-adsorbed monolayer and bilayer rGO models as increasing the oxidation degree and water content. By using first-principles method, we predict the migration paths and kinetic activation barriers for the in-plane proton transports on these rGO films. We suggest two different mechansims of epoxy- and water-mediated proton transports, and conclude that the water-mediated transport is really occurred due to much lower activation energy (~0.16 eV) than that of the epoxy-mediated one and being close to the experimental value.
Surface Application of Lime on a Guava Orchard in Production

ABSTRACT Several complications can arise, either directly or indirectly, from implementation of measures to correct soil acidity in established fruit orchards, such as impaired roots, lower root volume, risk of plant infection, propagation of diseases, promotion of pest development (especially nematodes), and soil disaggregation and compaction. These factors can have a negative effect on crop yield. Therefore, it becomes critical to implement an effective method of neutralizing soil acidity, especially at the level of the tree roots. To assess the [. ]
Determination of Tetracycline by Microdroplet Hydrodynamic Adsorptive Voltammetry Using a Multiwalled Carbon Nanotube Paste Rotating Disk Electrode

Abstract A novel and simple method is proposed for the determination of tetracycline by adsorptive voltammetry in a droplet using a carbon nanotube paste rotating disk electrode (CNTP-RDE). An enhanced electrochemical oxidation response of tetracycline was observed in pH 8.2 supporting electrolyte by the addition of a long-chain cationic surfactant, such as benzyldimethyltetradecylammonium chloride (zephiramine). Under the optimized experimental conditions, the calibration curve was linear across a tetracycline concentration range from 1.0 × 10−7 to 2.0 × 10−6 M. The limit of detection and sensitivity were 4.0 × 10−8 M and 0.9358 A M−1, respectively. This method was successfully employed for the determination of tetracycline in milk samples.
Family Function and Child Adjustment Difficulties in the COVID-19 Pandemic: An International Study

To estimate specific proximal and distal effects of COVID-19-related restrictions on families on children’s adjustment problems, we conducted a six-site international study. In total, 2516 parents from Australia, China, Italy, Sweden, the United Kingdom, and the United States of America living with a young child (Mage = 5.77, SD = 1.10, range = 3 to 8 years, 47.9% female) completed an online survey between April and July 2020. The survey included the Strengths and Difficulties Questionnaire and family risk factors (parent distress, parent–child conflict, couple conflict, and household chaos) as well as a scale to index COVID-19-related family disruption. Our analyses also included public data on the stringency of national restrictions. Across the six sites, parental responses indicated elevated levels of hyperactivity, conduct, and emotion problems in children from families characterized by heightened levels of parent distress, parent–child conflict, and household chaos. In contrast, increased peer problems were more strongly related to COVID-19-related social disruption and stringency measures. Mediation models demonstrated that associations between COVID-19 social disruption and child difficulties could be explained by parental distress. Taken together, these results suggest that although the experience of the pandemic differed across countries, associations between COVID-19-related family experiences and child adjustment difficulties were similar in their nature and magnitude across six different contexts. Programs to support family resilience could help buffer the impact of the pandemic for two generations.
Bid-ask spread, corporate board and stock liquidity in emergent markets

PurposeThis study analyzes the relationship between governance and stock liquidity. It uses different variables of corporate board characteristics and test three proxies of a bid-ask spread. It also provides comprehensive and robust evidence for the association between the corporate board and stock liquidity in the pure order-driven Tunisian market.Design/methodology/approachThis study is based on a sample covering all financial firms in Tunisia (banks, insurances and leasing companies) from 2008 to 2019. It employs a panel data approach.FindingsThe author finds a negative relationship between board sizes, financial institutional members in corporate board and bid-ask spread (absolute, relative and effective spread). The author suggests that better-managed firms have greatly improved their stock liquidity and lower trading cost. The empirical results reveal that better corporate governance firms improve stock liquidity since it is associated with higher information disclosure.Practical implicationsThis research encourages Tunisian firms to develop their governance mechanisms and restructure their board organization to improve stock liquidity. It can support the regulators to simultaneously design appropriate governance recommendations, disclosure policies and trading regulations.Originality/valueThe author presents empirical evidence of the role of corporate board on the bid-ask spread in an emerging market. The research is the first to analyze the corporate board characteristics using seven variables representatives of the board of directors and without using the governance index.
WiHGR: A Robust WiFi-Based Human Gesture Recognition System via Sparse Recovery and Modified Attention-Based BGRU

Gesture recognition is an essential part in the field of human–computer interaction (HCI) and Internet of Things system. Compared with the existing technologies based on wearable sensors and dedicated devices, approaches using WiFi channel state information (CSI) signals are more desirable for passive and fine-grained gesture recognition. However, the existing CSI-based gesture recognition systems usually suffer from high model complexity and low accuracy caused by environmental dynamics. To address these issues, we propose a robust gesture recognition system (WiHGR) in this article. The WiHGR starts with a sparse recovery method to find the dominant paths from the multipath effect introduced by the orthogonal frequency division multiplexing (OFDM) technology, i.e., the main propagation paths disturbed by a human gesture. Then, the phase difference matrix is constructed according to the phase differences between two adjacent receiving antennas from the dominant paths. We propose a modified attention-based bi-directional gate recurrent unit (ABGRU) network to learn and extract discriminative features automatically from the phase difference matrix. The proposed attention mechanism assigns higher weights to the more important features, thus achieving a better recognition performance. The experimental results show that the WiHGR not only has a high accuracy for gesture recognition in the training environment, but also has a remarkable performance in new environment settings without retraining.
Coloration of Chrome Tanned Leather by Maillard Reaction

: Chrome tanned leather sheets could be colored in an aqueous solution containing reducing sugars, similar to the coloration of various foods containing both protein and reducing sugars, by the Maillard reaction. The obtained sheets showed yellowish or brownish color. Further reaction conditions, such as reaction time, temperature, and types of reducing sugar, were also investigated in this paper, where it was clear that their long reactions at the high temperatures (>95 °C) caused not only their deep coloration, such as dark brown, but also their serious contraction owing to thermal denaturation of their protein
In situ organically cross-linked polymer gel for high-temperature reservoir conformance control: A review

Department of Petroleum Engineering, University Technology Petronas, 32610 Bandar Seri Iskandar, Darul Ridzuan, Perak, Malaysia Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia Center for Energy Science, Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia Correspondence Ismail Mohd Said, Department of Petroleum Engineering, University Technology Petronas, 32610 Bandar Seri Iskandar, Darul Ridzuan, Perak, Malaysia. Email: ismailsaaid@utp.edu. my Funding information Universiti Teknologi PETRONAS, Grant/ Award Number: YUTP 0153AA‐H05; Ministry of Education Malaysia; University of Malaya, Grant/Award Number: UMRG RP031B‐ 15AFR; PETRONAS, Grant/Award Number: GR&T 0153CB019
A fast X-ray-diffraction-based method for the determination of crystal size distributions (FXD-CSD)

A procedure for a fast X-ray-diffraction-based crystal size distribution analysis, named FXD-CSD, is presented. The method enables the user, with minimal sample preparation, to determine the crystal size distribution (CSD) of crystalline powders or polycrystalline materials, derivedviaan intensity scaling procedure from the diffraction intensities of single Bragg spots measured in spotty diffraction patterns with a two-dimensional detector. The method can be implemented on any single-crystal laboratory diffractometer and any synchrotron-based instrument with a fast-readout two-dimensional detector and a precise sample scanning axis. The intensity scaling is achievedviathe measurement of areferencesample with known CSD under identical conditions; the only other prerequisite is that the structure (factors) of bothsampleandreferencematerial must be known. The data analysis is done with a software package written in Python. A detailed account is given of each step of the procedure, including the measurement strategy and the demands on the spottiness of the diffraction rings, the data reduction and the intensity corrections needed, and the data evaluation and the requirements for the reference material. Using commercial laboratory X-ray equipment, several corundum crystal size fractions with precisely known CSD were measured and analysed to verify the accuracy and precision of the FXD-CSD method; a comparison of known and deduced CSDs shows good agreement both in mean size and in the shape of the size distribution. For the used material and diffractometer setup, the crystal size application range is one to several tens of micrometres; this range is highly material and X-ray source dependent and can easily be extended on synchrotron sources to cover the range from below 0.5 µm to over 100 µm. FXD-CSD has the potential to become a generally applicable method for CSD determination in the field of materials science and pharmaceutics, including development and quality management, as well as in various areas of fundamental research in physics, chemistry, chemical engineering, crystallography, the geological sciences and bio-crystallization. It can be used also underin situconditions for studying crystal coarsening phenomena, and delivers precise and accurate CSDs, permitting experimental tests of various theories developed to predict their evolution.
Genesis of Re‐rich Molybdenite in the Baishan Mo deposit, Eastern Tianshan, Xinjiang, Northwest China

The Baishan molybdenum deposit is located in the central part of the Eastern Tianshan‐Beishan tectonic belt, NW China. The deposit is hosted in early Carboniferous Gandun Formation biotite‐rich hornfels and is genetically related to unexposed granodiorite porphyry beneath the orebodies. The molybdenite occurs in three different types from early to late stage: Molybdenite ‐ Fe‐Cu‐sulfides ‐ K‐feldspar ‐ quartz veins (Group 1); Molybdenite ‐ Fe‐Cu‐sulfides ‐ quartz veins (Group 2); and disseminated molybdenite in the wall rock (Group 3). Rhenium concentrations in the molybdenite grains range from 108 to 277 ppm in Group 1, 69–121 ppm in Group 2 and 46–135 ppm in Group 3. The Re concentrations of molybdenite in the Baishan Mo deposit decrease from early to late and from the center to periphery, and molybdenite types vary from the 2H1 poly‐type in Groups 1 and 2 to the 2H1 + 3R2H1 poly‐type in Group 3, based on X‐ray diffraction results. The Re‐enriched molybdenite probably formed from an oxidized magmatic fluid that separated from a highly oxidized and H2O‐ and volatile‐enriched adakitic intrusion generated in the lower crust.
Fluorescence, Phosphorescence, or Delayed Fluorescence?—A Theoretical Exploration on the Reason Why a Series of Similar Organic Molecules Exhibit Different Luminescence Types

In contrast to the traditional view that the small organic molecules emit fluorescence, more and more experiments manifest their special luminescence types, such as the thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence. Why the similar organic molecules exhibit different luminescence types is focused on in this work on the basis of density functional theory/time-dependent density functional theory calculations on a series of small organic molecules with phenoxazine or carbazole as a donor and diphenyl-triazine as an acceptor. The deep analysis of the geometrical and electronic structures shows how the structure, especially for the donor–acceptor dihedral angle, determines the singlet–triplet energy gap and the property of excited states. The explorations on the electron–hole pairs of natural transition orbitals and the contribution of the key heteroatom (N) to different molecular orbitals reveal the distinct electron transition processes of excitation to singlet and trip.
Virtual Tour Actual Usage: The Influence of Perceived Benefits and Sacrifices

Virtual tours are developed as alternatives to traditional tourism in Indonesia. This quantitative study analyzed factors that influence actual virtual tour usage. A survey was conducted with 1,125 respondents who were aware of virtual tour services. The data were processed using covariance-based structural equation modeling. The results indicate that perceived benefits and sacrifices influenced behavioral intention to use these services. However, accessibility did not affect this intention. Behavioral intention to use significantly affected actual virtual tour usage. This research can help virtual tour providers and regulators increase service utilization and implementation.
Evidence and Therapeutic Perspectives in the Relationship between the Oral Microbiome and Alzheimer’s Disease: A Systematic Review

This review aims to clarify the nature of the link between Alzheimer’s disease and the oral microbiome on an epidemiological and pathophysiological level, as well as to highlight new therapeutic perspectives that contribute to the management of this disease. We performed a systematic review, following the Preferred Reporting Items for Systematic Reviews checklist, from January 2000 to July 2021. The terms “plaque,” “saliva,” and “mouth” were associated with the search term “oral diseases” and used in combination with the Boolean operator “AND”/“OR”. We included experimental or clinical studies and excluded conferences, abstracts, reviews, and editorials. A total of 27 articles were selected. Evidence for the impact of the oral microbiome on the pathophysiological and immunoinflammatory mechanisms of Alzheimer’s disease is accumulating. The impact of the oral microbiome on the development of AD opens the door to complementary therapies such as phototherapy and/or the use of prebiotic compounds and probiotic strains for global or targeted modulation of the oral microbiome in order to have a favourable influence on the evolution of this pathology in the future.
The Relationships among Teacher Leadership, Teacher Self-Efficacy and Teacher Performance

: This study examined the relationships among teacher leadership, teacher self-efficacy and teacher performance according to teachers’ views. The participants of the study were 401 teachers working in the state (K12) schools in Altındağ, Ankara, who were determined through a random sampling method. The data were collected through Teacher Leadership Scale, Self-Efficacy Scale, and Job Performance Scale. A relational survey model was adopted in the study. The data were analyzed through quantitative analysis techniques, including descriptive statistics, correlation analysis and multiple linear regression analysis. The findings indicated high levels of perceptions of teacher leadership, self-efficacy, and performance in teachers. Moderate, positive, and significant relationships were observed among teacher leadership, teacher self-efficacy and teacher performance. In addition, teacher leadership was shown to predict self-efficacy and performance significantly. The findings pointed out that teacher leadership behaviors were an important concept involved in teacher self-efficacy and performance.
GIS Modelling of the Distribution of Terrestrial Tortoise Species: Testudo graeca and Testudo hermanni (Testudines, Testudinidae) of Eastern Europe in the Context of Climate Change

The study of the distribution of protected animal species in Europe is especially relevant in a changing climate. Therefore, in this work, we tried to solve the problem of the possibility of habitation of tortoises Testudo graeca Linnaeus, 1758 and Testudo hermanni Gmelin, 1789 in Eastern Europe by using species distribution models (SDMs). We used bioclimatic variables from the CliMond dataset (18 uncorrelated variables of 35) and 19 Paleoclim variables of the “early-Holocene” and “mid-Holocene”. Packages Maxent and 'ntbox' were employed. In addition to our data, we used findings listed in the GBIF databases: 1,935 points for T. graeca and 991 points for T. hermanni. It has been shown that subspecies of tortoises differ in the characteristics of the ecological niche. In addition to direct anthropogenic influences, the limiting factor is the “Mean temperature of coldest quarter” (bio11) for both species. Moreover, T. graeca is less demanding and can tolerate both frost and higher temperatures during drier periods than T. hermanni. Modeling found that in the future it is possible for these species will expand in a north-eastern direction, where potentially suitable habitats will appear: by 2090 in the South of Ukraine (Odessa region, Crimea) and East Ukraine (floodplain of the Siversky Donets River of the Don basin).
Change of Alpha-Amylase Activity in Saliva in Response to Blood Glucose After A High Carbohydrate Ingestion

Salivary α-amylase activity (SAA) may be correlated with blood glucose levels. However, change of SAA in response to blood glucose after carbohydrate diet remains unknown. In 17 healthy young adults, SAA was inversely correlated with blood glucose levels (r = −0.57, P = 0.02) at 1 h after a high carbohydrate ingestion, corresponding to a nadir in salivary α-amylase activity and a peak in blood glucose, suggesting a close link between these factors.
The Relationship between Multiple Intelligences and Biology Learning Outcomes of Student

The achievement of learning objectives can be seen from the learning outcomes obtained by students after the learning process. Appropriate learning strategies by paying attention to multiple intelligences in students can affect learning outcomes. This research aims to analyze the relationship of intelligence learning outcomes with the student's biological learning outcomes. This research was conducted on 1st-grade students of natural sciences at Padang High School. The sampling technique is stratified using purposive sampling and proportional random sampling. The research instrument used multiple intelligence questionnaires and multiple-choice questions. The data in this study were analyzed using the Spearman rank correlation test. The results showed that each multiple intelligences had a significant relationship with student learning outcomes, except for three types of intelligence: visual-spatial, physical kinesthetic, and intrapersonal intelligence
The relationship of leptin and thyroid hormones with milk yield and some fertility parameters in Simmental dairy cows during transition period

: In this study, transition period cows were used to test the hypothesis that serum levels of leptin and thyroid hormones would correlate the production efficiency such as milk yield, body condition score, and fertility in dairy cows raised under the same controlled conditions. The study comprised 37 Simmental cows, which were 3 years old and between 257–265 days of gestation. Serum levels of leptin, T3, T4, FT3, and FT4 hormones were measured in blood samples obtained from the animals, which were in the period of 3 weeks before and 3 weeks after delivery. Prepartum serum leptin levels were significantly (p < 0.05) lower in cows having increased milk production compared to the first lactation peak value. Also, postpartum serum FT3 levels were significantly (p < 0.05) lower in cows having milk yield of ≥ 30 kg. Leptin levels were found to be inversely related with milk production and fertility. FT3 levels exhibited a negative correlation with milk production and similarly T3 levels showed an inverse correlation with body condition score. The present study proposed that routine monitoring of leptin and thyroid hormones would be useful for the reproductive management of cows with breeding problems.
The Quality and Utilization of School Health Services of a State University in the Philippines

Higher educational institutions are responsible for integrating the vital aspect of primary healthcare services in school settings. The study assessed the quality and utilization of school health services (SHS) of a state university in the Philippines. A descriptive-comparative and correlational study was utilized through a researcher-made questionnaire among 310 respondents using stratified random sampling. Generally, findings revealed that the level of quality of SHS is high, and the extent of utilization is great. It showed significant differences in the level of quality when grouped as to geographic clusters and the extent of utilization when grouped as to designation and geographic clusters. There is a positive correlation between the level of quality and the extent of utilization of SHS. Challenges encountered were the limited availability of health personnel and inadequate health supplies and equipment. Therefore, the higher the quality of SHS, the greater is the extent of utilization towards building a healthy university.
Therapeutic Effects Of HPLC-Isolated Subfractions From Ethanolic Moringa Oleifera Leaf Extracts On Cancer And Inflammatory Diseases

The nutrient-dense and medicinal plant, Moringa oleifera (MO), has numerous reported therapeutic applications, which makes it a popular nutraceutical on the natural product market. However, scientists have only recently started to verify the therapeutic potential of MO products. Previous studies in our labs have shown potent anti-inflammatory and anticancer effects associated with ethanolic MO whole-leaf extracts. To further investigate potential applications of these MO extracts, our current project uses high performance liquid chromatography (HPLC) to separate bioactive compounds from the whole extract into distinct subfractions. We hypothesized that these HPLC-isolated MO subfractions could exhibit therapeutic effects in a cancer microenvironment by decreasing cancer cell viability and attenuating inflammatory cytokine production. Our results indicated that several of the subfractions significantly decreased the viability of HeLa and SiHa cervical cancer cells in a dose and time dependent manner. Additionally, these subfractions decreased macrophage secretion of the pro-inflammatory cytokines, interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-alpha), in a lipopolysaccharide (LPS)-induced model of inflammation. Overall, these data indicate that compounds in MO may be explored as an alternative treatment option for some cancers and inflammatory disorders. Further studies will seek to identify the bioactive compounds in our subfractions using analytical chemistry techniques.