Miracle-dz/UniFAR-FTUs huggingface dataset:
High Performance Thin Layer Chromatography Fingerprinting Analysis of Piper betle L. Leaves

Introduction: Many modern medicines used today based on plants and plant products. Piper betle is generally known as the betle vine, it is an important medicinal and recreational plant. High performance thin layer chromatography (HPTLC) is an advanced powerful analytical method with more separation power, high performance and superior reproducibility than classic thin layer chromatography (TLC). A chromatographic fingerprint of a plant extract is a chromatographic pattern of some common chemical constituents of pharmacologically active and/or chemical characteristics. Chromatographic fingerprints are useful in authentication and identification of plant. Objectives: Objectives of present research was to establish HPTLC fingerprinting of methanolic extract of Piper betle L. leaves. Materials and Methods: Methanolic extract of Piper betle leaves was prepared using soxhlet apparatus. HPTLC studies were performed using a CAMAG HPTLC system equipped with automatic TLC sampler-4 (ATS 4), TLC scanner 4, and vision CATS 3.0 software. Results: The study revealed the presence of alkaloids with Rf value 0.65, flavonoids with Rf values 0.19, 0.29, 0.72, 0.95. , and phenolic compound with Rf value 0.7. Original Research Article Kale and Patil; JPRI, 32(48): 8-15, 2020; Article no.JPRI. 65395 9 Conclusion: The HPTLC fingerprinting profile developed for the methanolic extract of Piper betle L. leaves will help in proper identification of the plant.
Event-Driven Multiagent Consensus Disturbance Rejection With Input Uncertainties via Adaptive Protocols

This article focuses on the multiagent consensus disturbance rejection (MCDR) for groups of general linear individuals by using the distributed event-based adaptive control technique. Based on designing disturbance observers, event-driven control rules involving controllers and actuator updating rules are provided for networks of multiple individuals without and with input uncertainties; the updating rules rely on the state-dependent factor, the exponential decay threshold, and a tuning parameter. For both scenarios, the global information of network topologies is not required in the design and continuous communications between agents can be avoided.
Teachers’ perceptions of exploiting immersive virtual field trips for learning in primary education

Abstract This study aimed to understand what role teachers consider the immersive virtual field trip (VFT) system to play in primary school classrooms. There were 19 teachers' perceptions of immersive VFTs for educational purposes explored. The interview transcripts were analyzed using the phenomenographic method. The results showed that, for usability issues, three categories: lack of interaction, language affordance, and hardware and network problems, were generated from the teachers' concerns. The teachers proposed three ideas: instructional scaffolding, microscopic scale, and localized content, for immersive VFT systems and content design. Regarding learning influences, the teachers considered that the learning by immersive VFTs may provide the benefits of: enriching experiences, increasing motivation, understanding abstract concepts, and fostering inquiry learning. The teachers suggested five instructional approaches: advance organizer, learning extension, learning evaluation, collaboration, and role playing for the implementation of immersive VFTs in classrooms. These findings could benefit future development of immersive VFT learning systems.
Evidence of element volatility at ambient conditions

Tailings represent a significant risk to the environment globally, but very little is known about the composition of the near-surface air. We conducted the laboratory experiments to determine the sizes of the particles and the chemical composition of the flow above the mine waste. A condensate of vapor–gas flow was collected in parallel with particle control by an aerosol diffusion spectrometer (ADS). We reveal that there were no aerosol particles bigger than 3 nm in the flow. The collected condensate contained chemical elements, ions of sulfates, chlorides, phosphates, and formates and a wide range of sulfur-, selenium-, and carbon-containing gases. The main findings of the study are the presence of the metals Zn, Cu, Fe, Al, Cd, Ni, and Ba and the metalloids As, Sb, Se, Ag, Co, Ti, and V in the true-gas phase or in the form of particles smaller than 3 nm in the air above the mine tailings. The surprising fact is that the migration of metals and metalloids in a true-gas form or in ultrafine particles (< 3 nm) is possible, which opens up a new research direction on the volatile forms of chemical elements in various climatic conditions and their bioavailability and toxicity.
Training College Students to Use Learning Strategies: A Framework and Pilot Course

The use of effective study strategies is important for academic achievement, yet research indicates that students often use relatively ineffective learning strategies. Though potent strategies to promote durable learning exist, there is a lack of theoretical and empirical work on how to train students to self-regulate use of these strategies successfully. We summarize a novel framework to do so: the knowledge, belief, commitment, and planning (KBCP) framework. The assumptions are that learners must develop knowledge about a strategy and how to use it, believe that the strategy is effective for the individual learner, commit to the strategy, and create an action plan for carrying it out. We then describe an example of the KBCP framework as applied to a college course on teaching students effective learning strategies and self-regulation of these strategies in their college coursework. Lectures on specific learning strategies conveyed knowledge about the strategies, in-class demonstrations illustrated their efficacy (to support belief), and assignments required students to develop a plan for applying them to their courses and to implement the plan (to ensure commitment). Discussion focuses on the implications of including training in how to use learning strategies in psychology courses and curricula, and on the possible extension of such training to the teaching of other psychology content.
Multi-stage intermittent drying of rough rice in terms of tempering and stress cracking indices and moisture gradients interpretation

ABSTRACT In this study, multi-stage intermittent drying (MSID) of rough rice is considered based on stress cracking index (SCI), tempering index (TI), and total drying/tempering duration for Hashemi and Koohsar varieties experimentally and theoretically. The samples were dried at 60°C for 20, 40, and 60 min and tempered at 60°C for 40, 80, 120, 160, 200, and 240 min after each drying stage. Afterward, the completion of the tempering process was assessed using the TI along with analysis of moisture content kinetics by a simplified drying model. For both varieties, the SCI decreased significantly until continuing the tempering operation to certain durations and increased for longer drying durations in each drying stage. Considering the SCI and the total drying/tempering duration, the tempering durations of 200 and 160 min after 40 min drying in each stage were determined as the best performed conditions for MSID of Hashemi and Koohsar varieties, respectively. The results achieved by the TI were in conformity with those obtained by the mathematical model. It was concluded that the TI and simulation of surface moisture content on a kernel could be applied for estimating the time required for supplementation of the tempering process to eliminate moisture content gradients created inside the kernels during the drying process.
Zur Streuung der mesophilen aeroben gesamtkeimzahl in grob zerkleinerten Fleischerzeugnissen : Mettwurst, Hackfleisch und Hamburger

In order to estimate whether the plate count results obtained in microbiological analysis are representative, the sample variation within a lot has to be known. A special hierarchical design permits splitting the total variance into the following three variance components: sample error (variance between the samples of a lot), methodological error and the unavoidable POISSON-variation (sampling error or random error). Former analyses of liquid, paste- or dough-like foodstuff and flowable powders have shown that in fresh material microorganims are distributed quite homogeneously while variance increases during storage time. Goal of this study was to find out about the changes in variance within coarsely chopped particulate foodstuff using fresh onion mettwurst, fresh ground beef and frozen hamburger as model substrate. The sample material consisted of 10 lots of mettwurst with 25 samples each, that were drawn 2 and 7 days after production and analyzed for total mesophilic plate count. Variance coefficients of the 25 samples, which were calculated for the mean of colonies counted on the plates amounted 20 to 49 % on the first day with one sample reaching up to 103 %. The second analysis showed values of 17 to 78 %. In some cases the ideal value ofthe quotient s 2 /x, which is 1.0, was exceeded considerably. This indicates that besides the unavoidable random error further effects have occurred increasing variance, which - according to analysis of variance - mainly resulted from sample errors. Samples that had been stored for one week showed additional methodological errors which might have resulted from homogenization-problems of substrate with a longer keeping-time. Nevertheless no characteristical development was to be noticed for total variance, as this parameter varied between the different storage times as well as among the different lots. Four lots of fresh ground beef and one lot of frozen hamburgers that were examined directly after production showed much better homogeneity. One lot of frozen hamburgers turned out to be nearly ideally homogenized, while sample errors in ground beef amounted 56 to 86 % of the total error - even though the total error remained quite low. Accordingly, for these materials it seems feasible to design universally applicable sampling-plans based on information gathered from previous analyses; whereas in mettwurst real variance will have to be estimated seperately for each lot by analyzing random samples, which complicates quality assurance.
Designing a Broadband Amplifier Without Load–Pull

The design of a broadband amplifier without using load–pull is described. This approach relies on a coarse model of the power amplifier, in which matching networks are represented by rational polynomials and the device by its large-signal model. A simultaneous search of the impedance space and possible matching networks via particle swarm optimization (PSO) can identify the design solution. The prototype amplifier demonstrates an outstanding gain of 12.8–14.9 dB with ±1 dB gain flatness, output power greater than 40 dBm, and efficiency between 51% and 70% over a target frequency range of 2.4–4.6 GHz, the highest frequency range using the CGH40010 to date. The measured two-tone third-order intermodulation (IMD3) is lower than −20 dBc up to an average output power of 38.7 dBm for frequencies less than 4.2 GHz. The impedances obtained by our approach converge within the high-efficiency region identified by the conventional load–pull approach.
Metacognitive Strategies for Reading Comprehension in Basic Education Students

The objective of this review article was to determine how metacognitive strategies improve reading comprehension in Basic Education students, for which it was proposed to search for and select the recent scientific investigations regarding metacognitive strategies and reading comprehension. Sixty papers published between 2015 and 2020 in indexed journals that address metacognitive strategies and reading comprehension were analyzed. For the choice of articles, four tables were used aligned to what was established in the flow diagram of the Prisma protocol. It was found that 70% of articles were based on metacognition theory, 15% on constructivist theory and the other 15% on other theories. It was evidenced that 50% of the studies belong to South America, while 25% to Asia and 25% to Europe. Metacognitive strategies help improve reading comprehension in elementary school students, favor self-regulation during the reading process. The role of teachers is very important for the use of appropriate and diverse strategies, techniques in order to strengthen learning and reading comprehension. The problem of reading comprehension is also manifested in the study of foreign languages. The application of metacognitive strategies programs or workshops highly favored reading comprehension, and their application in the reading development phases were planning, supervision and evaluation, which helped to significantly improve the comprehension of texts.
Associations between vertical and horizontal jumps with power values during deadlift exercise among youth soccer (football) players

Objectives: The similarity in joint angles and performance between the deadlift and vertical jumps was previously displayed. Additionally, the hexagonal barbell produces greater peak power compared to performance with traditional Olympic barbell. To optimally develop power and performance in explosive tasks in sport (such as jumps), training with the load that maximizes the power output is considered ideal. Therefore, the objective of this research is to investigate the relationship between jumps and power values during the deadlift exercise performed with a hexagonal barbell. Methods: 14 youth soccer players (16-18 years old) were tested on the Sargent jump test, broad jump test, one repetition maximum (1RM) using the PUSH 2.0 band that was used for displaying the power values at 45, 55, 65, 75, 85, and 95% of 1RM. Correlations between jumps and power values at different percentages of 1RM were evaluated by Pearson’s correlation coefficients. Results: The significant correlation (p<0.05) was evidenced between Sargent jump test and power value at 45, 55, 65, 75% 1RM (r= 0.75; r=0.60; r=0.56; r=0.53, respectively), and between Broad jump and power at 45, 55, 65% 1RM (r=0.71; r=0.51; r=0.54, respectively). Conclusion: Power values at moderate loads were significantly correlated with vertical and horizontal jumps. Therefore, it could be expected that training at moderate loads that produce the greatest power values will lead to greater development of jumping performance, which can be important also for improving soccer performance.
Hard work, growth mindset, fluent English

Citation for published version (APA): Highet, K. , & Del Percio, A. (2021). Hard work, growth mindset, fluent English: navigating neoliberal logics. In M. Sardo (Ed.), The Impacts of Neoliberal Discourse and Language in Education: Critical Perspectives on a Rhetoric of Equality, Well-being and Justice (Routledge Studies in Education, Neoliberalism, and Marxism). Routledge. https://www.taylorfrancis. com/chapters/edit/10.4324/9780367815172-7/hard-work-growth-mindsetfluent-english-katy-highet-alfonso-del-percio
Histological analysis of the tongue, esophagus and crop of Southern Carcará (Polyborus plancus)

The Southern Caracara is a bird of prey, of the family Falconidae, inhabits all the Brazilian territory, they are omnivorous birds adapted for hunting. The digestive system of the predators presents differences in their morphology due to their eating habits. Knowing the importance of the gastrointestinal system, this study aims to carry out a histological study of the tongue, esophagus and the crop of Polyborus plancus. For this purpose, eight avian of both sexes, with different body weights and ages were used, they were euthanized and the organs were collected, fixed, dehydrated and stained with hematoxylin-eosin. It was noted that the tongue has stratified squamous epithelium with mucous glands and with different degrees of keratinization. The esophagus and crop have four well developed muscle layers and mucous glands. Additionally, in the crop there is presence of an adventitious layer that consists of loose connective tissue. We conclude that the tongue, the esophagus and the crop of the Southern Caracara have similar histological organization of several birds like the Pekin Ducks, ostriches, domestic chicken and partridges.
Study and Improvement of Acoustic Conditions in Public Spaces of Shopping Malls

Acoustic comfort in shopping malls is one of the aspects that influence the shopping environment. Making enjoyable and comfortable retail and public spaces is demanded when designing and managing properties. This paper focuses on the study of the public spaces with a large volume in the operating malls, which are perceived as acoustically uncomfortable. The main reason for poor acoustic conditions is a too long reverberation, as the measured reverberation time reached 4–5 s at middle frequencies. The usual way to improve the acoustics is to apply sound-absorbing materials on space surfaces. Two examples of improving acoustic conditions in food courts are given. In both cases, the reverberation time was reduced by about half, and changes in acoustics were considered significant and positive. It is shown the Sabine’s equation is valid for considered spaces. Average absorption coefficients are found by means of the Sabine’s equation and can be used for quick estimation of the reverberation time in similar spaces without the absorbing treatment. Based on the analysis of this and other studies, a method for qualitative assessment of the public space acoustics is proposed.
Tracking Control of a Linear Motor Positioner Based on Barrier Function Adaptive Sliding Mode

The tracking performance of linear motor (LM) positioners is subject to payload uncertainty and external time-varying disturbances. Conventional robust controllers typically employ a high control gain that is substantially greater than the known a priori upper bound of the disturbance to ensure tracking error convergence. The main disadvantage of those controllers lies in that when the disturbance decreases, the control input is often overly generated, which then results in undesired control chattering effect or even actuator saturation. To overcome this problem, this article develops a robust tracking controller based on barrier function adaptive sliding mode (BFASM) for the LM positioners. The main benefits of BFASM are twofold: first, the controller is designed without the need for any disturbance information; second, its control gain is adaptively adjusted in terms of the amplitude of disturbance and, thus, leads to decreased control input when the disturbance becomes small. Furthermore, a modified barrier function (MBF) is proposed for applications with actuator saturation. It is proved that both the BFASM and MBF-based controllers can ensure the convergence of the tracking error into a prespecified neighborhood of zero in finite time. Experimental results on a real LM positioner demonstrate the superior properties of the developed controllers in comparison with two existing robust control schemes.
Calidad y satisfacción de los servicios escolares de una institución de educación superior mexicana: la visión de los estudiantes

La presente investigación se realizó en el departamento de Servicios Escolares (SE) de una institución de educación superior ubicada en México y tuvo como objetivo medir la calidad del servicio ofrecido desde la percepción de los estudiantes. Este estudio, por tanto, fue exploratorio y descriptivo; primero se realizó una medición cuantitativa y posteriormente se aplicaron entrevistas cualitativas mediante la técnica de grupos focales. Los resultados indican que el servicio que ofrece el departamento de SE es de adecuada calidad, de acuerdo con la percepción de los estudiantes. Las calificaciones más bajas se presentan en las dimensiones capacidad de respuesta y empatía, ya que prevalece como principal inconveniente la actitud que asume una parte del personal del departamento de SE, caracterizada en ocasiones por la falta de amabilidad, disposición y tiempo de respuesta. Se requiere, por tanto, que los administradores inspiren en estos empleados el significado y la importancia que tiene el servicio a los estudiantes, plasmados en su misión, visión y objetivos. Por eso, se propone que la institución fomente una cultura de sensibilidad del servicio, apoyada en la teoría del comportamiento organizacional, en donde todos los trabajadores sean amigables, corteses, accesibles y expertos. Asimismo, se recomienda establecer un sistema de evaluación constante en la institución para determinar los niveles de satisfacción en beneficio de la calidad de los servicios escolares ofrecidos.
Influence of Early Adolescents’ Mastery Goals on Inter- and Intra-Individual Relationships Between Metacognitive Monitoring and Academic Outcomes

We aimed to investigate the inter- and intra-individual relationships between early adolescents’ achievement goals, metacognitive monitoring, and academic outcomes. Korean sixth graders responded to achievement goal questionnaires, solved four quizzes, monitored their own confidence in these four quizzes, and took a final exam. Given the nested data structure, we conducted multi-level path modeling, which can distinguish between inter- and intra-individual effects in a single model. We found significant between-person indirect effects of mastery goals on the final exam score via individual’s average scores for the four calibrations and for the four quizzes. We also found a positive within-person relationship between the calibration and quiz scores. The students’ pursuit of personal mastery goals positively moderated this within-person relationship. These findings indicate that pursuing mastery goals can be more effective for metacognitive monitoring and knowledge acquisition, particularly for early adolescents.
Aberration corrected STEM techniques to investigate polarization in ferroelectric domain walls and vortices

Ferroelectric domain wall (DW) based nano-electronics is an emerging new field of research. It is only recently with advancements in electron and atomic force microscopy instrumentation that the complex nature of these 2D entities can be probed. In this Research Update, the advances in aberration corrected scanning transmission electron microscopy applied to ferroelectric topological defects are summarized. We discuss sub-atomic imaging and diffraction techniques used to observe changes in polarization, chemical composition, charge density, and strain at DWs and vortices. We further highlight the current achievements in mapping the 3D nature of ferroelectric polar skyrmions and in situ biasing. This Review will focus on both the fundamental physics of DW and polar vortex formation and their dynamics. Finally, we discuss how electron spectroscopy can be used to relate the quantified structural distortions of polar topological entities to changes in their oxidation state and band structure.