Miracle-dz/UniFAR-FTUs huggingface dataset:
Modified TiO2 nanotube arrays (TNTAs): progressive strategies towards visible light responsive photoanode, a review

Since first introduced by Zwilling and co-workers in 1999, titania nanotube arrays (TNTAs) fabricated by simple electrochemical anodization method have attracted great interest due to their outstanding photoelectrochemical properties which render them the most promising candidate for many solar energy harvesting applications. In this contribution, the fabrication, properties, and applications of TiO2 nanotube arrays have been reviewed, with special focus on synthesis by anodization in fluoride-containing electrolytes. The effect of anodization process parameters such as electric potential, pH, anodization duration and electrolyte composition on the size, and morphology of TNTAs has been discussed in detail. Electronic property modification strategies of the wide band gap TNTAs to enhance the material responsiveness to visible light irradiation have also been reviewed. Modification strategies include nonmetal doping such as nitrogen, carbon, boron and sulfur; metal ion doping such as Fe, Zn, Zr and Cr; surface decoration with precious metal nanoparticles such as Pt, Ag, Au; and sensitization with CdS nanoparticles.
Molecular dynamics simulations of (001) MgO surface contacts: effects of tip structures and surface matching

Molecular dynamics simulations were carried out to study contact behaviour of MgO pyramidal tips with atomically flat MgO surfaces in the (001) direction. Both commensurate and incommensurate contact modes over a wide range of surface interaction have been considered, from weakly interacting to highly compressed. Characteristic mechanical instability ‘jump’ effects were observed in the former case, and, to a much smaller extent, in the latter case as well. By making comparison between the rectangular MgO probes from our previous work and the pyramidal probe it was found that detailed contact and withdrawal behaviour depended very much upon the local geometrical structure of the contacting tips. Specifically, the strain distribution and the change in interplanar spacing were different during contacts. When a pyramidal probe is withdrawn, the first sign of hysteresis results in disrupted crystal structures near the contacting tip and is almost always followed by subsequent complex plastic dislocation and ‘neck’ formation. The probe with the ‘sharpest tip’ is found to undergo modification at the tip to give a truncated octahedron structure and subsequently shows a very different contact behaviour. For example, the modified probe can be withdrawn completely from the surface without any damage, a phenomenon not commonly encountered with other clean MgO contact systems in our work.
Leadership Capabilities and Operational Efficiency of Faith-Based Organisations in Nigeria

This study explored the impact of leadership capabilities on the operational efficiency of faith-based organisations (FBOs) in Nigeria. The strategic leaders are decision-making bodies that played a critical role in choosing and executing organisational strategies in FBOs. The motivation of this study was deduced from the problems of failure and vision/goal achievement seems to have progressively threatened the life and growth of many FBO sin Nigeria. With the assistance of stratified and simple random sampling techniques, one hundred and forty (140) respondents were selected from the leadership system of the selected organisation. One hundred and eighteen (118) copies of the questionnaire were received, reflecting the response rate of 84.21 percent. The mathematical method used for the study was the Structural Equation Model (AMOS 23). The findings indicated that the organisation's leadership skills have a major impact on its operational performance. The results also showed that demographic features moderate the relationship of faith-based organisations between leadership capabilities and operational efficiency of FBOs. The research recommended that leadership capabilities (strategic direction, people management skills and technological strength) should be leveraged and prioritized by faith-based organisations for more operational efficiency and excellent performance outcome. Future research could expand the spectrum on several fast-growing organisations focusing on the Pentecostal and other faiths.
The P-DESTRE: A Fully Annotated Dataset for Pedestrian Detection, Tracking, and Short/Long-Term Re-Identification From Aerial Devices

Over the years, unmanned aerial vehicles (UAVs) have been regarded as a potential solution to surveil public spaces, providing a cheap way for data collection, while covering large and difficult-to-reach areas. This kind of solutions can be particularly useful to detect, track and identify subjects of interest in crowds, for security/safety purposes. In this context, various datasets are publicly available, yet most of them are only suitable for evaluating detection, tracking and short-term re-identification techniques. This paper announces the free availability of the P-DESTRE dataset, the first of its kind to provide video/UAV-based data for pedestrian long-term re-identification research, with ID annotations consistent across data collected in different days. As a secondary contribution, we provide the results attained by the state-of-the-art pedestrian detection, tracking, short/long term re-identification techniques in well-known surveillance datasets, used as baselines for the corresponding effectiveness observed in the P-DESTRE data. This comparison highlights the discriminating characteristics of P-DESTRE with respect to similar sets. Finally, we identify the most problematic data degradation factors and co-variates for UAV-based automated data analysis, which should be considered in subsequent technologic/conceptual advances in this field. The dataset and the full specification of the empirical evaluation carried out are freely available at http://p-destre.di. ubi.pt/.
Turnaround Management of Airport Service Providers Operating during COVID-19 Restrictions

Many sectors worldwide have been impacted by government restrictions resulting from the COVID-19 pandemic. For example, restrictions on travel have resulted in major losses for organizations operating within the aviation sector. This study aims to emphasize the challenges faced by these organizations while they implement turnaround management strategies. The study is based on 30 semi-structured interviews with frontline managers working for airline service providers in three different departments of an airport in Australia. The organization has implemented several turnaround management strategies to survive the crisis caused by COVID-19 restrictions, creating new challenges for its work environment. Our findings indicate that the frontline managers faced two main challenges during and after the implementation of turnaround management strategies. First, inadequate human resources, caused by a lack of personnel resources and poor leadership selection. Second, a lack of communication, caused by excluding frontline managers from the turnaround management planning stage; poor sharing of information during the implementation stage; inadequate direction of frontline managers; and a lack of feedback channels regarding the change process. Based on its findings, the study recommends building a frontline manager task force and creating a strategic communication plan for frontline and senior managers.
Influencia del portainjerto sobre la incidencia de artrópodos en lima Tahití [Citrus latifolia (Yu Tanaka) Tanaka]

To determine the incidence of pests on Tahiti lime grafted in six rootstocks, plots were established in three locations in Colombia. Samples of leaves and shoots were taken and the incidence of the main groups of arthropods was evaluated. During the samplings in Lebrija, Santander, the mite number / leaf of each species of mite was recorded by rootstock. Additionally, in two locations, the percentage of mite damage in fruits in harvest, and in one, the incidence of thrips in flowers were measured. In addition to descriptive statistics, non-parametric tests were performed, such as Kruskall Wallis to evaluate differences between rootstocks. The results show that there are no differences between rootstocks, except for: (1) The incidence of phytophagous mites in two samplings at the Caribia research center. (2) On the number of mites / leaves of Panonychus citri in Lebrija. It was found that there is no clear trend in favor of any genotype and the response to arthropods is dependent on the time of sampling. A list of insects and mites associated with Tahiti lime in the main production areas in Colombia and their natural enemies is presented.
Pyrolysis Analysis of Crude Oils and Their Fractions

This research was conducted to investigate the pyrolysis behavior of crude oils and their fractions using differential scanning calorimetry and thermogravimetry. Experiments were performed at 10 °C/min heating rate under nitrogen atmosphere. An examination of the fractions of crude oils shows that pyrolysis mechanisms depend on the chemical nature of the constituents. A study of the weight loss properties of SARA constituents suggests that each fraction in whole crude oil follows its own reaction (distillation and cracking) pathway independent of the presence of other fractions.
Health status and its socio-economic covariates in the older population in Poland – the assumptions and methods of the nationwide, cross-sectional PolSenior2 survey

Introduction Population ageing constitutes an increasing medical, social, and economic burden worldwide. Optimal senior policy should be based on well-assessed knowledge on the prevalence and control of age-related diseases, multimorbidity, disabilities, and their social determinants. The objective of this paper is to describe the assumptions, methods, and sampling procedures of the PolSenior2 survey, which was aimed at characterising the health status of old and very-old adults in Poland. Material and methods The project was conducted in the period 2018–2019 as a cross-sectional survey of a representative sample of people aged 60 years and over. Subjects were selected using three-stage stratified and proportional random sampling in seven equally sized (n = 850) age groups. The study protocol consisted of face-to-face interviews, specific geriatric scales and tests, and anthropometric and blood pressure measurements performed by well-trained nurses at participants homes as well as blood and urine sample laboratory tests. Results In the Polsenior2 study a group of 5987 subjects underwent the questionnaire parts of the survey, and almost all (n = 5823) agreed to blood or urine sample collection. Conclusions In recent decades several studies focused on various aspects of elderly health and life conditions had been carried out in Poland and Central and Eastern Europe. However, none of them is so complex and has covered so many issues as PolSenior2, which is the largest study devoted to the health status of older persons in Poland and one of the largest and the most comprehensive in Europe. The results of the study will help to improve health policy targeted at the elderly population in Poland.
The Effect of Parents’ Social Economic Condition, Way of Learning and Learning Motivation to the Learning Outcome of Economy Subject

This study to analyze 1) The effect of parents 'social economic condition affecting the students way of learning on economy subject class X SMAN 1 Aek Natas North Labuhan batu Region, 2) The effect of parents 'social economic condition affectingto students learning motivation on economy subjects class X SMAN 1 Aek Natas North Labuhanbatu Region, 3) The way of learning effect to students learning motivation on economy subjectclass X SMAN 1 Aek Natas North Labuhanbatu Region, 4) The way of learning effect to student learning outcome on economy subjects class X SMAN 1 Aek Natas North Labuhanbatu Region, 5). The learning motivation effect to student learning outcome on economy subjects class X SMAN 1 Aek Natas North Labuhan batu Region, 6) The effect of parents 'social economic condition affecting the students learning outcome on economysubject class X SMAN 1 Aek Natas North Labuhan batu Region,. with a sample of 150 respondents. Field SURVEY by distributing questionnaires was conducted to collect data. The data obtained were analyzed using Structural Equation Modeling (SEM) with Smart PLS 3.
Electrocatalytic Oxidation of Dopamine and Ascorbic Acid on Carbon Paste Electrode Modified with Nanosized Cobalt Phthalocyanine Particles: Simultaneous Determination in the Presence of CTAB

Metallophthalocyanine (MPc) and its derivatives are well known as electrocatalysts to catalyze oxidation or reduction of some species, such as cysteine, nitric oxide. Their nanosized particles may display the potential optics, electronic, catalytic and structural properties. In this paper, carbon paste electrodes modified with nanosized cobalt phthalocyanine particles (denoted as Nano-CoPc-CPE) are fabricated. The electrocatalytic oxidation of dopamine (DA) and ascorbic acid (AA) on the Nano-CoPc-CPE was investigated by means of cyclic voltammetry. Nano-CoPc particles perform good electrocatalytic activity to DA and AA. The anodic peak potentials of DA and AA were separated with good sensitivity in the presence of cetyltrimethylammonium bromide (CTAB). The DA and AA can be simultaneously determined by using differential pulse voltammetry. On optimal conditions, the good linear response to DA and AA was observed in the range of 3.0×10−6–1.0×10−4 M and 5.0×10−6–3.0×10−4 M with the correlation coefficient of 0.9983 and 0.9978, respectively. Moreover, 100-fold AA did not interfere in the determination of DA. This method has been used to simultaneously determine DA and AA concentration in mixed drug samples with satisfactory results.
Speed of streamers in argon over a flat surface of a dielectric

A pin–pin electrode geometry was used to study the velocities of streamers propagating over a flat dielectric surface and in gas close to the dielectric. The experiments were done in an argon atmosphere, at pressures from 0.1 to 1 bar, with repetitive voltage pulses. The dielectric surface played a noticeable role in discharge ignition and propagation. The average speed of the discharge decreased with higher pressure and lower voltage pulse rise rate. It was higher when the conductive channel between the electrodes was formed over the dielectric, rather than through the gas. Space resolved measurements revealed an increase in velocity of the discharge as it travelled towards the grounded electrode.
GaN-Based Megahertz Single-Phase Inverter With a Hybrid TCM Control Method for High Efficiency and High-Power Density

Compared with traditional frequency limitation method DCM and QCFTCM for TCM-based inverter, this article proposes a hybrid TCM method, which can achieve both full range ZVS and frequency variation limitation. An accurate resonant transition model is established and the switching frequency variation range can be obtained for TCM. The hybrid control can be implemented according to the variation ratio γ. In order to determine the optimal γ, an offline optimization algorithm based on loss estimation is proposed. Therefore, an accurate analytical loss model for GaN HEMTs considering the nonlinear junction capacitance is given for TCM and hybrid TCM. The loss model shows that the total losses of hybrid TCM inverter are reduced compared with TCM. Moreover, an interleaved GaN-based megahertz single-phase inverter with digital control is demonstrated with 120 W/in3 power density. The aforementioned benefits are experimentally verified in the optimal hybrid TCM. With this hybrid control, the measured peak efficiency is 98%. Compared with pure TCM mode, there is a 70% reduction in the switching frequency and the related efficiency is 0.8% higher at light loads. Higher power density (135 W/in3) can be achieved in hybrid TCM through further increasing the switching frequency compared with pure TCM.
A primer on electrocatalysis

A short review of the development and achievement of electrocatalysis in the last 50 years is given. The need for the knowledge of the reaction mechanism and position of the rate determining step for rational choice of catalyst is particularly stressed. Fundamental aspects of electrocatalysis are elaborated in more detail on the examples of electrochemically important reactions of hydrogen evolution and oxygen reduction, as well on the reaction of electrochemical oxidation of organic fuels (e.g., methanol).
Organo- and Water-Dispersible Graphene Oxide−Polymer Nanosheets for Organic Electronic Memory and Gold Nanocomposites

A solution-processable graphene oxide (GO)−polymer complex, consisting of GO nanosheets with covalently grafted poly(tert-butyl acrylate) (PtBA) brushes, was prepared via surface-initiated atom transfer radical polymerization (ATRP). The grafted hydrophobic polymer brushes substantially enhance the solubility of GO in organic solvents, and the GO-g-PtBA nanosheets can form a uniform and stable dispersion in toluene. The functionalized GO nanosheets can also be integrated into an electroactive polymer matrix. Bistable electrical conductivity switching behavior and a nonvolatile electronic memory effect were demonstrated in a composite thin film of poly(3-hexylthiophene) (P3HT) containing 5 wt % GO-g-PtBA in an Al/GO-g-PtBA+P3HT/ITO sandwich structure (ITO = indium−tin oxide). Hydrolysis of GO-g-PtBA produces water-dispersible GO-g-PAAc (PAAc = poly(acrylic acid)) nanosheets and allows the preparation of gold nanoparticle-decorated GO-g-PAAc nanofilms from aqueous dispersions.
Polymerization of 4-Dimethylamino-N-propargylpyridinium Bromide by Transition Metal Catalysts

The polymerization of an ionic propargyl derivative, 4-dimethylamino-N-propargylpyridinium bromide (DMAPPB), was carried out by palladium, platinum, and ruthenium chlorides. The polymerization of DMAPPB by these transition metal catalysts proceeded well to give a relatively high polymer yield. The chemical structure of the resulting polymer was characterized by such instrumental methods as elemental analysis, infrared, NMR, UV–visible spectroscopies to have conjugated polymer backbone system bearing 4-dimethylamino-N-methylenepyridinium bromide. The polymer was soluble in DMF, DMSO, and formic acid, and found to be less hygroscopic than those of similar homologues having more smaller substituents. The resulting polymers were mostly black powders and showed the amorphous morphology.
Parameter Identification Based Online Noninvasive Estimation of Rotor Temperature in Induction Motors

This article proposes a rotor temperature estimation method for in-service induction machine (IM) based on parameter identification, which combines the advantage of recursive least squares (RLS) and model reference adaptive system (MRAS). The RLS with forgetting factor is firstly adopted to identify the parameters of motor inductances. Then, the online identification of rotor resistance can be realized via the MRAS based on the instantaneous reactive power (IRP) and the proportional integral (PI) regulation adaptive law designed by the Popov hyper-stable theory. Thereby, the rotor temperature is computed by the resistance-temperature relationship of metals. To achieve a fast convergence of the parameter identification, rotor slot harmonics are extracted from the stator current and used to determine the rotor speed in real time. Furthermore, to obtain a more accurate initial value of the stator and rotor leakage inductances and resistances, the first 5–15 cycles of the IM starting process are used to mimic the locked-rotor test condition. A merit of the proposed method is that it requires significantly less time to estimate the rotor resistance than the traditional methods. With a novel test bench, experimental validation is performed on a 22-kW IM. In the test, the rotor temperature is measured in three different ways: 1) wireless sensors inserted in the rotating rotor core and rotor end rings, 2) infrared sensor for rotor end ring temperature, and 3) PT100 installed in stator end winding. With this test bench, the real rotor temperature was revealed, and the effectiveness of the presented method is also verified.
Gender Differences in Gastrointestinal, Hepatobiliary and Pancreatic Surgery and Perceived Relevance on Outcomes —A Single Center 22-Year Observational Study in India (1996-2018)

Introduction: Gender differences are still quite prevalent in the present time. Although there is literature regarding gender differences in healthcare expenditure in India, there is no data regarding gender differences in hospital stay, hospital seeking behaviors and mortality. Aim: To evaluate the Gender differences in a hospital seeking behavior, mortality and hospital stay. Methods: We prospectively analyzed, from a retrospective database, all patients who underwent surgical gastrointestinal, hepato-biliary, pancreatic and splenic surgeries from 1996 to 2018 in our unit. Patients were divided into groups based on gender, admission time period and priority of admission i.e., elective or emergency. Both the gender groups were compared with respect to total procedures done, hospital stay and mortality. Organ specific mortality was calculated as proportions, was analyzed and compared between the groups. Time trends of the same were observed and compared. Results: Of 12,411 patients, 7979 (64.3%) were males and 4432 (35.7%) were females. 9191 (74.1%) patients underwent elective procedures whereas 3220 (25.9%) had emergency procedures (p ≤ 0.001). Overall mortality was higher in males (n = 473, 5.92%) in comparison to females (n = 185, 4.17%) (p ≤ 0.001). Majority of surgeries in males were of small intestine (22.5%) in which small bowel resection was most commonly done (5.4%), whereas, gallbladder and biliary surgeries (27.4%) were the most common in females in which laparoscopic cholecystectomy was most commonly done (5.8%). Median hospital stay was higher in males (10 days vs 9 days), (p ≤ 0.001). Mortality was higher in females in all organ categories except in liver (6.34% vs 2.7%), pancreas (37.3% Vs 18.3%) and spleen (3.38% Vs 1.62%) where mortality was higher for male gender. Highest mortality for females was in small intestinal surgery (34%) and for males, it was pancreatic surgery (37.3%). Highest mortality in males was emergency open pancreatic necrosectomy (21.6%) and that in females was emergency small intestinal surgery (11.9%). Although the number of surgeries in females increased over time (380 in 1996-1999 Vs 951 in 2016-2018), the proportion remained constant (36.3% Vs 38.3% in 1996-1999 and 2016-2018 respectively). Conclusion: We conclude that mortality is found to be higher in males after gastrointestinal surgery, which may be explained by the fact that hospital seeking behavior is more in males though it is fairly increasing in females in the recent years.
Interpenetration of Interacting Polyelectrolytes

The structure of aggregates formed by oppositely charged polyelectrolytes of the same chain length N and charge density and the kinetics of the formation of these aggregates have been studied using a dynamic Monte Carlo algorithm. The model considers the evolution of chains through local motion of monomers and exhibits the complex behavior associated with the formation of such aggregates. The chains interpenetrate in two distinct steps-the chains first diffuse toward each other and then collapse abruptly to form smaller aggregates. This abrupt collapse is a consequence of cooperativity in the aggregation process