Miracle-dz/UniFAR-FTUs huggingface dataset:
Capacitance Swing and Capacitance Ratio of GaN-Based Metal-Semiconductor-Metal Two-Dimensional Electron Gas Varactor with Different Dielectric Films

The performance of the AlGaN/GaN MSM-2DEG varactor with different dielectric films deposited by the E-beam deposition is investigated in detail. The capacitance swing and the capacitance ratio of the varactor without dielectric film as well as with, SiO2, Gd2O3, and Si3N4 films, respectively, are determined by electrodes of varying areas. The maximum capacitance, the minimum capacitance and the capacitance ratios are proportional to the increasing of the electrode areas. The capacitance ratio determined by the maximum and the minimum capacitance is found to be 18.35 (with Si3N4 dielectric film) and 149.51 (without dielectric film), respectively. The transition voltages of the fabricated varactors are almost the same for a bias voltage of about ±5 V and leakage current can be lower three orders of magnitude while the varactors with dielectric films. The tunability of the capacitance ratio makes the AlGaN/GaN MSM-2DEG varactor with a dielectric film highly useful in multirange applications of a surge free preamplier.
Autologous conditioned serum for degenerative diseases and prospects

Abstract Autologous conditioned serum (ACS) is a blood-derived product that is prepared by the incubation of whole blood with medical-grade glass beads, resulting in serum enrichment in interleukin-1 receptor antagonist (IL-1Ra), anti-inflammatory cytokines (IL-4, IL-10, and IL-13), and high concentrations of growth factors. ACS has shown qualitatively and quantitatively better therapeutic effects than most established pharmacological treatments and surgery for joint diseases given its ability to both target the inflammatory cascade to decrease cartilage destruction as well as improve endogenous repair mechanisms. ACS application is simple and safe with limited adverse effects. This article reviews the role of ACS in degenerative joint disease, in addition to other inflammatory and autoimmune diseases, given its regenerative and immune-modulating properties.
Embracing Paradox: TMT paradoxical processes as a steppingstone between TMT reflexivity and organizational ambidexterity

Top management teams are crucial in managing the ambidexterity paradox. This endeavour, however, generates cognitive conflicts. Surprisingly, this particular topic has received little attention within the ambidexterity literature. We aim to address this lacuna and, in doing so, extend the paradox literature and the emerging socio-cognitive perspective on ambidexterity. In our hypothesized mediation model, top management teams embrace the exploration-exploitation paradox through reflexivity, then overcome this paradox through paradoxical cognitive processing – the capacity to cognitively differentiate and integrate exploration and exploitation – which finally fosters ambidexterity. We test and find support for our hypotheses using a sample of 335 Dutch and German small and medium enterprises. We end with a discussion on how socio-cognitive factors influence the management of the ambidexterity paradox. In doing so, we refine scholarly understanding of motivating and enabling factors that allow top management teams to deal with the paradoxical tensions surrounding ambidexterity.
Varieties’ Response of Vegetable Cowpea to Mechanical Inoculation of Cowpea Aphid-Borne Mosaic Virus in Burkina Faso

Vegetable cowpea is eaten mainly fresh, in the form of young, immature pods, tender and sweet like the common bean. However, like cowpea with seeds, vegetable cowpea experience yield losses due to the cowpea aphid-borne mosaic virus (CABMV). This study aims to improve yields through the development of vegetable cowpea varieties resistant to CABMV. The study focused on ten varieties of vegetable cowpea, carried out in a greenhouse at the Kamboinsé research station using a randomized complete block design with three replications, all inoculated with CABMV. The data collection concerned resistance parameters. Mechanical inoculation made it possible to observe various symptoms of CABMV, thus highlighting the existence of variability within the varieties tested. Strong correlations were observed between several variables. Thus, the varieties of vegetable cowpea IT85F-2089-5, UG-CP-8, IT85F-2805-5 and Telma were identified as resistant, because belonging to the low severity classes and having a low value of area under the disease progress curve. On the other hand, the varieties RW-CP-5, UG-CP-6, IT83S-911, niébé baguette grimpant possessing a high severity class were judged to be susceptible. These resistant varieties will thus be able to contribute to the improvement of production and the protection of cowpea resources in Burkina.
Effect of growth forms of bamboo on the mycorrhizal and fluorescent pseudomonas population

Bamboo, also called as the poor man’s timber, is one of the fastest growing giant grass species. Having shallow root system and fast growth rate, the dependability of the plant on the rhizospheric microbial web cannot be denied. The study was conducted to explore the population and seasonal variations of indigenous mycorrhizal fungi as well as the functional diversity of plant growth promoting bacteria, especially fluorescent pseudomonas from the different growth forms of Dendrocalamus strictus, the most commonly present bamboo species in Indian sub-continent. In a past study, it was established that the growth forms of D. strictus which developed over time in their respective locations, were genetically varied. The present research further explores the variations in their respective rhizospheric microbes and looks for the role of plant selection phenomenon. Considerable variation in mycorrhizal structures and in the functional diversity of fluorescent pseudomonas was registered. It seems probable that selection pressure of nutrient deficient condition has created a condition that promoted occurrence of high numbers of P solubilisers which, in turn, boosted the mycorrhizal as well as bamboo growth.
An Understanding of the Improved Grades, Retention and Graduation Rates of STEM Majors at the Academic Investment in Math and Science (AIMS) Program of Bowling Green State University (BGSU)

The Bowling Green State University Academic Investment in Math and Science (BGSU AIMS) program was founded in 2001. This 4-year undergraduate program has grown from one class with 10 inaugural members to four classes with 69 members majoring in science/technology/engineering/math (STEM)-based areas.
The impact of COVID-19 on tourists’ length of stay and daily expenditures

This study evaluates the effect of the COVID-19 pandemic on tourists’ length of stay and daily expenditures at a destination. The paper compares detailed microdata for visitors to a Northern Spanish region in the summer periods of 2019 (pre-pandemic) and 2020 (after the pandemic outbreak). We estimate the pandemic-induced impacts on the length of stay and expenditures per person for several categories using regression adjustment, inverse probability weighting regression and propensity score matching. We find clear evidence of a drop in the length of stay of around 1.26 nights, representing a 23.8% decline. We also show that, although total expenditures per person and day have remained constant, there has been a change in the allocations for categories in the tourism budget.
Comparison of Analgesic Efficacy of Erector Spinae Plane Block and Posterior Quadratus Lumborum Block in Laparoscopic Liver Resection: A Randomized Controlled Trial

Purpose Ultrasound-guided fascial plane blocks, including the erector spinae plane (ESP) and quadratus lumborum (QL) blocks, provide effective postoperative abdominal analgesia. However, there is limited evidence on the analgesic efficacy of ESP and QL blocks after liver surgery. Therefore, we aimed to compare the cumulative opioid consumption between the ESP and QL blocks in patients with hepatocellular carcinoma undergoing laparoscopic liver resection. Patients and Methods Eighty-eight patients scheduled to undergo laparoscopic liver resection were randomized to receive bilateral single injection of ESP block at T8 (ESP group) or bilateral single injection of posterior QL block (QL group; 20 mL of 0.375% ropivacaine for each side, ie, total 150 mg of ropivacaine), in addition to intravenous (IV) fentanyl patient-controlled analgesia and multimodal analgesia. The primary outcome was cumulative opioid consumption over the first 24 h, expressed as IV morphine equivalents. Secondary outcomes included serial plasma ropivacaine concentrations, pain scores, time to first flatus, and Quality of Recovery-15 scores. Results Eighty-five patients were analyzed (ESP group, n = 42; QL group, n = 43). Cumulative 24-h opioid consumption was similar between the ESP and QL groups (41.4 ± 22.6 mg vs 44.2 ± 20.0 mg, mean difference (QL-ESP), 2.8 mg, 95% confidence interval, −6.4 to 12 mg, p > 0.99). There were no significant differences in resting pain scores at 24, 48 and 72 h postoperatively or recovery outcomes. The peak plasma ropivacaine concentration 30 min after injection was significantly higher in the ESP group (1.5 ± 0.3 µg/mL) than in the QL group (1.3 ± 0.5 µg/mL, p = 0.035); however, both were lower than the arterial threshold value of systemic toxicity (4.3 µg/mL). Conclusion ESP and QL blocks provided similar postoperative analgesia in patients undergoing laparoscopic liver resection.
Effect of Full- and Small-Scale Reeling Simulation on Mechanical Properties of Weldable 13Cr Seamless Line Pipe

There are several methods currently being used to install offshore oil and gas pipelines. The reel-lay process is fast and one of the most effective offshore pipeline installation methods for seamless, ERW, and UOE line pipes with outside diameters of 18 inches or less. In the case of the reel-laying method, line pipes are subjected to plastic deformation multiplication during reel-laying. It is thus important to understand the change of the mechanical properties of line pipes before and after reel-laying. Therefore, full-scale reeling (FSR) simulations and small-scale reeling (SSR) simulations are applied as evaluation tests for reel-laying. In this study, FSR simulations were performed to investigate the effect of cyclic deformation on the mechanical properties of weldable 13Cr seamless line pipes. Furthermore, SSR simulations were performed to compare the results obtained by FSR simulations.Copyright © 2013 by ASME
Land application of wood-fired and combination boiler ashes: an overview

Ashes from the burning of wood and other plant-derived materials have been used as soil amendments for centuries. Although historical interest in land application of ashes declined following the advent of commercial fertilizers and alternative liming materials, additional incentives for this beneficial use have arisen in recent years. The first is from rapidly rising landfill costs for disposal of by-product ashes produced from the paper and electric utility industries. Secondly, the environmental ethic of sustainable management and the concept of recycling have provided incentives to replace nutrients removed from forest and agronomic harvests. Field and greenhouse studies show that wood-fired boiler ashes can be successfully used as a replacement for agricultural lime with additional nutrient benefits. Ash application on forest land is less common, but Scandinavian studies indicate that ashes can enhance long-term productivity of some forested sites. The use of ashes alone or combined with other mill residues, fertilizers, or agricultural wastes could prove particularly valuable for sustaining productivity of intensively managed forests over successive rotations. This overview provides an introduction to a subset of papers presented at the NCASI Symposium on Land Application of Wood-Fired and Combination Boiler Ashes.
Saying and shaking ‘No’

In many instances, the head shake can be used instead of or in addition to verbal ‘No’. Based on previous work on negation in dialogue, we observe head shaking as answer particles and as responding to an implicit or an exo-phoric (i.e., real world situation) antecedent. Exophoric head shake, however, seems to come in two flavours: with positive and with negative emotional valuation of the antecedent situation. We provide semantic analyses for all three uses (and a head nod) within an HPSG version which is implemented in Type Theory with Records and the dialogue framewok KoS. In particular, we extend on previous work by grounding “exophoric negation” in positive or negative appraisal. Finally, we briefly speculate about differences between verbal ‘No’ and head shaking due to (the lack of) simultaneity.
Real-World Data on Treatment Management and Outcomes of Patients with Newly Diagnosed Advanced Epithelial Ovarian Cancer in Greece (The EpOCa Study)

New treatment modalities have been recently introduced in the management of ovarian cancer (OC). Herein, we sought to investigate their implementation in routine clinical practice and examine the real-world management of OC in Greece. EpOCa was a non-interventional, multicenter, retrospective study in patients with advanced epithelial OC. The primary outcome was to estimate the proportions of the different treatment regimens used per line of therapy, while progression-free survival (PFS) and overall survival (OS) were the key secondary endpoints. A total of 154 patients were enrolled in the study, among whom, 40% were tested for BRCA mutations and 30% were found to be positive. Nearly 90% of patients underwent debulking surgery at diagnosis, with few operations being also recorded upon relapse. Platinum-based chemotherapy (CT) was predominantly used in the first line with half of patients also receiving angiogenesis inhibitor (AI), while non-platinum-based CT was preferred in later lines. The median PFS was 18.2 and 8.8 months in the first- and second-line setting, respectively, whereas the median OS was approximately 50 months. Our study adds to the available, but limited, real world data on the management of ovarian cancer providing evidence regarding the applied treatment strategies and outcomes of patients in Greece.
Comparison between ISO 2631–1 Comfort Prediction Equations and Self-Reported Comfort Values during Occupational Exposure to Whole-Body Vehicular Vibration

It is important to understand whole body vibration (WBV) since it affects comfort and is important in worker health and performance. Although discomfort can be subjectively evaluated, the ISO 2631–1 standard predicts discomfort based on vibration magnitudes, frequencies and durations. The objective of this study was to determine whether the ISO 2631–1 prediction method produces similar results to self-reported discomfort levels during routine heavy machinery operations in the field. While working under normal conditions, 6 df seat-pan vibration data were recorded in construction, mining, and forestry vehicles. At 5-minute intervals, operators rated their discomfort based on the preceding minute of vibration exposure. Discomfort was predicted from the vibration total value for each corresponding one-minute vibration profile. Each industry showed consistent trends between the predicted and self-reported discomfort; however, there were different relationships between industries. Construction showed a weak positive relationship (r2=0.09) between predicted and self-reported discomfort values, whereas both forestry and mining showed no relationship. The predicted discomfort levels did not accurately represent self-reported discomfort; this is similar to some previous studies, but contrasts with other studies. This variability may be due to discrepancies with the prediction equations, or perhaps due to additional factors being incorporated into self-reported comfort measures, such as temperature, noise, and fatigue.
Determination of Frequency-Based Switch Triggers for Optimal Vibration Reduction via Resonance Frequency Detuning

Resonance frequency detuning (RFD) is a piezoelectric-based vibration reduction approach that applies to systems experiencing transient excitation through a system resonance. Particularly, this vibration reduction technique can be applied to turbomachinery experiencing changes in rotation speed, such as on spool-up and spool-down. This technique relies on the inclusion of piezoelectric material and manipulation of its electrical boundary conditions, which control the stiffness of the piezoelectric material—the open-circuit condition corresponds to the high stiffness state of the material and the short-circuit condition corresponds to the low stiffness state. When placed in a region of high strain, the altered stiffness of the piezoelectric material causes a global stiffness change in the system. Resonance frequency detuning takes advantage of this effect by switching from the opento the short-circuit stiffness state as the excitation approaches resonance, subsequently detuning the structure from the excitation and reducing the vibratory response. Although other piezoelectric vibration techniques exist that allow for a greater reduction of the response (spanning the range from passive to active approaches), these techniques suffer drawbacks when applied to systems with tight size and power requirements, such as a turbomachinery environment. Resonance frequency detuning simplifies these approaches by relaxing some of these requirements by creating a large broadband vibration reduction approach with limited power, circuitry, and signal processing requirements. For this approach, the peak response dynamics are
Universal current mode biquad using a single CFOA

Because of their several advantages over the traditional voltage mode op-amp, current feedback op-amps (CFOAs) have attracted prominent attention as alternative building blocks for biquad filter realization. Previously known universal current mode (CM) biquads (i.e. those capable of realizing all five generic filter functions, namely low-pass, band-pass, high-pass, notch and all-pass) are realizable with CFOAs but require two to nine CFOAs. Although a few dual-function/three-function single-CFOA-based CM circuits have appeared in the literature, no single-CFOA-based canonic universal CM biquad with explicit CM output has been reported until now. This paper presents such a circuit. The workability of the proposed circuit has been confirmed by PSPICE simulations based upon AD844-type CFOAs.
Effects of DPP4 Inhibitors on Renal Outcomes in Diabetes Mellitus: A Systematic Review and Meta-Analysis

Objectives: This meta-analysis of randomized clinical trials (RCT) intends to evaluate the efficacy of DPP4 Inhibitors (DPP4I) compared with placebo, other antidiabetics (or DPP4I) on renal outcomes, adverse events (AEs), and all-cause mortality. Methods: We searched relevant scientific database for RCTs with DPP4I and prespecified renal end point. The effect size (mean difference or risk ratio) was reported with its 95% confidence interval. Results: Eight RCTs (n = 39040 participants) were included in the analysis. The rate of change in eGFR was not different in DPP4 inhibitor and control group. DPP4I use beyond 52 weeks did not worsen albuminuria progression (RR 0.88; 95% CI 0.80 to 0.96; high quality evidence) compared to placebo. The risk of AEs within 52 weeks (RR 0.93; 95% CI 0.80 to 1.08; moderate quality evidence), beyond 52 weeks (RR 0.98; 95% CI 0.97 to 1.00; low quality evidence), and all-cause mortality (RR 1.04; 95% CI 0.96 to 1.12; very low quality evidence) were similar to placebo. In head-to-head comparison between two DPP4I studies, no significant differences were found between alogliptin and vildagliptin for improvement in eGFR, UACR, or AE at 24 weeks. Conclusions: DPP4I do not seem to provide persuasive benefit in the renal outcomes or all-cause mortality in diabetes mellitus, though there was no evidence for increased AEs.
AN ELECTRON MICROSCOPE STUDY OF THE FETAL DEVELOPMENT OF HUMAN LUNG

Results of a study of lung ultrastructure in 13 human fetuses of about 1 to 6 months of gestation are reported. Light microscope controls were obtained in all cases. The columnar epithelial cells of young fetuses contained large deposits of glycogen which tended to become less abundant between the fourth and the sixth month. The fine structure of epithelial glycogen is described. A gradual transition between the columnar or cuboidal epithelium and the attenuated cytoplasmic lining of fully developed alveoli started during the fifth month, when the first contacts between capillaries and epithelium were established. Further differentiation of the epithelial cells in two morphologically different types, as observed in adult lung, took place during the sixth month. Both types appeared to have the same endodermal origin. Lamellar inclusions were first observed during the sixth month. Their significance is discussed in the light of recent work on alveolar surface activity.
The development of PC based CAD tools for auto-expansion circuit breaker design

It is shown that, with the current understanding of basic arc physics, CAD tools based on a mathematical model encompassing all important physical processes can be developed to aid the design of auto-expansion circuit breakers. The model takes account of radiation transport, arc radiation induced inner wall ablation, turbulence enhanced momentum and energy transport and the moving parts of the breaker. With the aid of the PC based PHOENICS, a commercial general purpose computational fluid dynamics (CFD) package, the conservation equations for the gas and arc together with the relevant Maxwell's equations can be solved. The temperature, velocity and electric fields within the breaker can easily be visualised and the thermal interruption capability predicted. The effects of changing design parameters can be simulated in detail, thus reducing the number of short-circuit tests. Results are verified by available tests.
Lois analytiques pour les écoulements en cavité rotor-stator

The evolution of the entrainment coefficient K of the rotating fluid in a rotor-stator cavity with an axial throughflow is studied according to the flow parameters. Following the analysis performed by Schlichting [1] in the single disk case, we determine analytical laws for the prediction of K, which depends in each case on a different local flow rate coefficient. The influence of all parameters (geometry of the cavity, rotation rate, throughflow, prerotation level, rugosity, blades) are investigated. The behavior of the entrainement coefficient is confirmed by extensive measurements realized in water for a Batchelor type of flow with separated boundary layers by the means of a laser Doppler anemometer. The results are also compared to those performed by pressure transducers.
Effects of Temperature and Structural Geometries on a Skyrmion Logic Gate

We design a skyrmion-magnetic domain interconversion logic gate (SkyMDILogic) gate and use it as a model system to study the geometrical and thermal effects. We particularly focus on the effects of temperature and structural defects. Micromagnetic simulations are used to study the skyrmion movement and characterize the relevant properties. We also construct an equivalent circuit model to calculate the energy consumption and logic operations at different temperatures. We find that temperature significantly affects the stability of a skyrmion. At elevated temperatures, the skyrmion propagation is more robust against the pinning effect of structural defects. Our results highlight the effects of thermal and structural defects, which remained largely unexplored in previous logic gate designs.