Miracle-dz/UniFAR-FTUs huggingface dataset:
Evaluation of the environmental aging of the glass fiber-reinforced polymer composite when in contact with the effluent of a treatment plant

This paper presents an evaluation of the mechanical and physical behavior of the type E glass fiber-reinforced polymeric composite when exposed to environmental aging agents in an effluent treatment plant. The composite was made by the hand layup process, and the test bodies were made according to the American Society for Testing and Materials standards D3039-14 and D790-10 for the uniaxial tensile and three-point bending tests, respectively, where they were exposed for a period of eight months, conditioned above and immersed in the effluent of the treatment plant. The physicochemical characterization of the effluent was evaluated considering the following parameters: pH, conductivity, sulfate, alkalinity, acidity, sulfide, and temperature, aiming to characterize the effluent conditions in direct and indirect contact with the composite. After the exposure period, tests were carried out for morphological evaluation, structural integrity evaluation, mechanical performance evaluation, and fracture characterization of the polymer composite, thereby leading to a comparison of the mechanical characteristics in the original state to that of the aged state (after exposure in the effluent treatment plant). The polymeric composite studied was stable after the aging period, with little mass variation, less than 0.5%, and slight changes in color. The mechanical properties evaluated also did not change significantly during the study period. Variations in uniaxial tensile strength were less than 1.4% and for three-point bending less than 10%, thus showing that the type E glass fiber-reinforced polymer composite has potential for use in harsh environments such as in effluent treatment plants.
Static and dynamic behavior of (FG-CNT) reinforced porous sandwich plate using energy principle

This paper deals with the static and dynamic behavior of Functionally Graded Carbon Nanotubes (FG-CNT)-reinforced porous sandwich (PMPV) polymer plate. The model of nanocomposite plate is investigated within the first order shear deformation theory (FSDT). Two types of porous sandwich plates are supposed (sandwich with face sheets reinforced / homogeneous core and sandwich with homogeneous face sheets / reinforced core). Functionally graded Carbon Nanotubes (FG-CNT) and uniformly Carbon Nanotubes (UD-CNT) distributions of face sheets or core porous plates with uniaxially aligned single-walled carbon nanotubes are considered. The governing equations are derived by using Hamilton's principle. The solution for bending and vibration of such type's porous plates are obtained. The detailed mathematical derivations are provided and the solutions are compared to some cases in the literature. The effect of the several parameters of reinforced sandwich porous plates such as aspect ratios, volume fraction, types of reinforcement, number of modes and thickness of plate on the bending and vibration analyses are studied and discussed. On the question of porosity, this study found that there is a great influence of their variation on the static and vibration of porous sandwich plate.
Li-Bi-Se semiconductor thin films: technology, structure and electrophysical properties

The results of structural investigations and electric field-induced properties of thin (40–100 nm) Li-Bi-Se films grown on glass substrates by means of the resistive evaporation technique are reported. The experimental investigations of microstructure and phase composition of thin films by transmission electron microscopy (TEM) and electron diffraction methods are carried out. Тhe experimental current-voltage dependences and transport of charge carriers are discussed.
An Exploration of First-Year Students’ Engagement in a Postsecondary Common Reading Program

This study used the narrative engagement framework from the communication discipline to explore first-year college students’ engagement in common reading program events and activities, engagement with the text’s narrative, and students’ affirmation of attitudes espoused in the text’s narrative. A total of 325 first-year students enrolled at Texas State University responded to a web-based survey of about their experiences with the 2016-2017 Common Reading Program book, What It Is Like to Go To War (Marlantes, 2011). The book, a memoir of Marlantes’ experiences as a Marine Lieutenant during the Vietnam War, features scholarly reflections on the nature of war and its consequences on a society and its soldiers. The results of this non-experimental, exploratory quantitative study indicated that students were moderately engaged with the narrative itself, and large variability existed among students’ engagement with the common reading program. In contrast, there was little variability in students’ prior experiences with the military and war; in fact, most students had only minor prior experiences. An orthogonal four-factor model, originally developed by Busselle and Bilandzic (2009), fit the data in this study and were explained by the higher order factor of narrative engagement. The multivariate analyses conducted for this study suggested the presence of differences between students’ prior experiences with the themes on the program engagement and narrative engagement variables, but not in the affirmation of story-consistent beliefs. No differences existed among students’ intended majors on narrative engagement, program engagement, or story-consistent beliefs. The analyses identified differences among gender identities on storyconsistent beliefs, but not program engagement or narrative engagement. Finally, multiple
Grain boundary segregation of P and its interaction with Cr and Mo in Ni-base alloys

The behaviour of phosphorus (P) segregation to grain boundary during cooling and aging and its interaction with chromium (Cr) and molybdenum (Mo) in Ni-base alloys have been investigated using transmission electron microscopy. P segregation takes place during cooling and aging. The segregation width was several nanometres, much wider than the grain boundary thickness. This indicated a non-equilibrium mechanism. The effect of grain boundary misorientation angle and grain size on the segregation level has been investigated. The grain boundary P concentration increased with increasing misorientation angle until about 45°. A further increase in the grain boundary misorientaion angle resulted in a decline of the segregation level. Compared with random high angle grain boundaries, special grain boundaries displayed much lower segregation. This can be related to the free volume dependence on the misorientation angle. When the effective time during cooling is shorter than a certain critical time, increasing grain size reduced the grain boundary segregation level because of the higher mass transfer coefficient close to the grain boundary in samples with smaller grain size. Segregation level during cooling at different rates and after aging for different times was obtained. A critical cooling rate and aging time existed where the grain boundary P concentration reached a maximum, indicating a non-equilibrium segregation pattern. Calculations based on Faulkner’s [1, 2] and Xu’s [3] and Wu’s [4] theory were conducted and compared with the experimental results. As regard the effect of grain size, the results based on Wu’s theory were consistent with our experimental results. The elemental interaction between P and Cr or Mo was investigated. On samples without P addition, no segregation of Cr and Mo was observed after cooling and aging due to the low binding energy between vacancies and Cr or Mo. With P addition, P segregated to the grain boundary while Cr and Mo were depleted at the grain boundary. With increasing P concentration, the grain boundary Cr and Mo concentrations decreased in a linear manner due to the repulsive relative interaction coefficient between P and Cr or Mo in Ni-base alloys.
Optimization of adhesion of poly lactic acid 3D printed onto polyethylene terephthalate woven fabrics through modelling using textile properties

Purpose This paper aims to evaluate and simulate the impact of the build platform temperature of the three-dimensional (3D) printer, the structure and heat transfer of textiles on the adhesion and durability after washing properties of 3D printed polymer onto textile materials using thin layers of conductive and non-conductive extruded poly lactic acid monofilaments (PLA) deposited on polyethylene terephthalate (PET) woven fabrics through fused deposition modeling (FDM) process. Design/methodology/approach Prior to FDM process, thermal conductivity, surface roughness and mean pore size of PET woven fabrics were assessed using the “hot disk,” the profilometer and the capillary flow porometry methods, respectively. After the FDM process, the adhesion and durability after the washing process properties of the materials were determined and optimized based on reliable statistical models connecting those properties to the textile substrate properties such as surface roughness, mean pore size and thermal conductivity. Findings The main findings point out that higher roughness coefficient and mean pore size and lower thermal conductivity of polyester woven textile materials improve the adhesion properties and the build platform presents a quadratic effect. Additionally, the adhesion strength decreases by half after the washing process and rougher and more porous textile structures demonstrate better durability. These results are explained by the surface topography of textile materials that define the anchorage areas between the printed layer and the textiles. Originality/value This study is for great importance in the development of smart textiles using FDM process as it presents unique and reliable models used to optimize adhesion resistance of 3D printed PLA primary layer onto PET textiles.
From Wafers to Bits and Back again: Using Deep Learning to Accelerate the Development and Characterization of SiC

A non-destructive, fast and accurate extended defect counting method on large diameter SiC wafers is presented. Photoluminescence (PL) signals from extended defects on 4H-SiC substrates were correlated to the specific etch features of Basal Plane Dislocations (BPDs), Threading Screw Dislocations (TSDs), and Threading Edge Dislocations (TED). For our non-destructive technique (NDT), automated defect detection was developed using modern deep convolutional neural networks (DCNN). To train a robust network, we used our large volume data set from our selective etch method of 4H-SiC substrates, already established based on definitive correlations to Synchrotron X-Ray Topography (SXRT) [1]. The defect locations, classifications and counts determined by our DCNN correlate with the subsequently etch-delineated features and counts. Once our network is sufficiently trained we will no longer need destructive methods to characterize extended defects in 4H-SiC substrates.
Layer Charge Effects on Adsorption and Diffusion of Water and Ions in Interlayers and on External Surfaces of Montmorillonite

Molecular simulations using classical force fields were performed to study the adsorption and diffusion properties of water and ions in the high-charge (Arizona-type) montmorillonite clays with varying relative humidity (RH) at 298.15 K. The simulation results of basal distances derived from swelling free energy curves and of water uptake are in good agreement with experiments. Overall, the simulated self-diffusion coefficients of the interlayer species are in reasonable agreement with experiments and lower than those estimated for the external surfaces. Influence of the magnitude of the layer charge was studied by comparing these simulation results with those obtained for the low-charge (Wyoming-type) montmorillonite clays. Most importantly, these comparisons confirm the experimental finding that the high-charge clay generally shifts swelling transitions toward lower RH values. Therefore, the adsorption and dynamics of water and ions are significantly different in the low- and high-charge clays near the .
Thermophysical properties in deep eutectic solvents with/without water

Physical properties of pure DESs and DESs mixed with different amounts of water were investigated by different techniques, including, rotational viscometer, Quartz Crystal Microbalance (QCM) and conductivity meter. In order to study heterogeneity of those liquids in nature. Analysis of these data showed some characteristics of heterogeneity, the extent of which depends on the number of hydrogen bond donors in the pure DES.
REPERMEABILIZACIÓN MEDIANTE REVISIÓN CON AGUJA DE AMPOLLAS DE FILTRACIÓN CON FRACASO TARDÍO TRAS CIRUGÍA DE GLAUCOMA NEEDLE REVISION OF LATE FAILING FILTERING BLEBS AFTER GLAUCOMA SURGERY

Purpose: To evaluate the results of bleb needling in eyes subjected to filtering surgery six months or more previously. Methods: A retrospective study of 23 eyes in 21 patients subjected to bleb needling performed by means of a 25G needle, 6 months to 23 years after failed filtering surgery (mean 67.3 months). The mean number of bleb needlings was 1.2 and the mean number of 5-fluorouracil subconjunctival injections was 3.9. Results: The mean intraocular pressure (IOP) before needling was 26 mmHg and the mean anti-glaucoma medications was 1.3 per eye. The mean postoperative IOP was 16.3 mmHg and mean antiglaucoma medications 0.7. A diffuse filtering bleb was evident in 12 eyes (54.5%). The results of needling were worse in eyes subjected to previous surgery for glaucoma or other failed bleb needling procedures (75% failure). Conclusion: Needle revision of the filtering bleb is a simple and safe technique that offers good results even years after a filtering surgery had been perfor
Tailored online diagnostics for a laser-driven plasma ion source prototype

This work describes the development of various elements of a laser-driven ion source at the Centre for Advanced Laser Applications (CALA). At the heart of CALA is the ATLAS3000, a titanium sapphire laser system that, with its peak performance of 3 petawatts and a repetition rate of 1 Hz, is one of the world’s leading high power systems of its kind. The goal is to develop an ion source for applications. In a two-year prototype test phase at the Laboratory for EXtreme Photonics (LEX Photonics), various elements of the laser-driven ion source were optimized and new developments implemented. The reliable acceleration of protons with a repetition rate of 0.5 Hz and capability of several 100 shots within a few hours is one of the achievements that, among other things, enabled the first irradiation of zebrafish embryos. The main part of this thesis deals with the development of two novel online diagnostic methods. Using a chirped-pulse probing method, we were able to record the dynamic of the laser plasma interaction dynamics during a single laser shot in 9 snapshot images with a temporal separation of about 200 fs and a spatial resolution of about 25μm. The measurements allowed us to analyze the temporal and spatial intensity distribution of the laser pulse at full energy during the interaction; a method we referred to as Temporally Resolved Intensity Contouring (TRIC). In addition, this probing method enables monitoring the plasma interaction during operation with full laser energy and can thus provide further important insights that enable optimizing of the laser-driven ion source. With Ion-Bunch Energy Acoustic Tracing (I-BEAT), a detector has been developed that can measure the energy spectrum of single, very intense ion bunches. The basis of I-BEAT is the measurement of sound waves that are generated, when ions in water are decelerated and thus deposit energy. The temporal shape of the sound waves contains the complete information about the spatial distribution of the energy deposition, from which the incident energy distribution of the ions can be determined. In two experimental campaigns; one at LEX Photonics and one at the Draco laser system in Dresden, we demonstrated the functionality of I-BEAT. We used I-BEAT to diagnose focused ion bunches and compared the results with those from Gafchromic film stacks. I-BEAT is distinguished by its simplicity, high repetition rate capability, high dynamic range towards high ion densities and insensitivity to known deleterious effects of electromagnetic pulses on signals. Another great advantage is that the ions could, by detecting the emerging sound waves, be detected directly in the sample of future applications, as for example with biomedical irradiations. At the CALA research facility, the new developments and findings of this work can be
Use of a chain extender as a dispersing agent of the CaCO3 into PBAT matrix

This paper investigates the effect of the incorporation of chain extender on the poly(butylene adipate-co-terephthalate) (PBAT) and their mixture with calcium carbonate (CaCO3) composites. Chain extender (ADR) was used to enhance the compatibility between PBAT and CaCO3, which have poor interfacial adhesion. Mechanical, thermal, and morphological properties of PBAT, PBAT/chain extender, and their composites were studied. The incorporation of the chain extender enhanced Young’s modulus and elongation at break of the neat PBAT, which is an indicator of the interaction between both materials. These results were confirmed by 1H NMR and 13C NMR (proton – hydrogen and carbon nuclear magnetic resonance, respectively). The chain extender acted by dispersing the CaCO3 particles; however, with an increase in the filler content, there is a decrease in the mechanical properties. Thermogravimetric analysis showed that chain extender has no influence on neat PBAT thermal behavior and their composites containing CaCO3. Differential scanning calorimetric analysis showed a decrease in crystallinity values of the PBAT and its composites, which is due to the physical impediment in the organization of polymer chains. Photomicrographs, obtained by scanning electron microscopy, showed that chain extender does not influence PBAT morphology. However, in the composites, chain extender enhanced the dispersion on CaCO3 particles.
The Effect of Ash Deposition on a Transonic Turbine Guide Vane

Effects of ash deposition on a transonic turbine guide vane are studied numerically. By incorporating the critical velocity sticking model in the commercial fluid dynamics software-FLUENT, the two-dimensionnal, steady ReynoldsAveraged Navier-Stokes(RANS) equations are solved for the clean vane and then the ash deposition rate on the turbine guide vane surface is acquired. Then the turbine vane pressure surface is set roughness based on the ash deposition rate. Two roughness setting strategies are adopted. One of them is setting average roughness and the other is setting variable roughness according to the fitting curve of the ash deposition rate. Lastly, the flow field of the guide vane with different roughness is calculated to investigate the effects of ash depositon on the aerodynamic performance of the turbine vane. The differences of results caused by the above two roughness setting strategies are also discussed. The distribution of deposition rate on the vane surface indicates that ash particles are mostly deposited on the blade pressure surface and that deposition rate has a drastic fluctuation, which may cause rapidly increasing roughness on the blade surface. By comparing the blade flow field with different blade surface roughness, it is found that surface roughness has little effects on the mach ditribution along the blade surface but increases the blade surface friction and the total pressure loss observably. Furthermore, results show that the variable roughness on the blade pressure surface has smaller effects on the blade aerodynamic performance than those caused by uniform roughness.
Odor in textiles: A review of evaluation methods, fabric characteristics, and odor control technologies

During use, textile items can develop unpleasant odors that arise from many different sources, both internal and external to the human body. Laundering is not always effective at removing odors, with odor potentially building up over time due to incomplete removal of soils and odorous compounds and/or malodors transferred during the laundering process. Textile odor can lead to consumer dissatisfaction, particularly as there are high expectations that clothing and textile products meet multiple aesthetic and functional needs. The problem of odor in textiles is complex and multi-faceted, with odorous volatile compounds, microorganisms, and precursors to odor, such as sweat, being transferred to, and retained by, fabrics. This article reviews the literature that specifically relates to odor within textiles. Methods for evaluating odor in textiles, including methods for collecting odor on textile substrates, as well as sensory and instrumental methods of odor detection, were reviewed. Literature that examined differences among fabrics that varied by fabric properties were reviewed. As well, the effectiveness of specific odor controlling finishing technologies to control malodor within textiles was also examined.
A CLINICAL STUDY OF THE EXTRACORPOREAL CARDIAC SHOCK WAVE THERAPY FOR CORONARY ARTERY DISEASE

Objectives To evaluate the security and efficiency of extracorporeal cardiac shock wave therapy (CSWT) for treatment of coronary artery disease. Methods A total of 45 patients with coronary artery disease (CAD) were included in this study (Male 36, Female 9, mean age 67 years old). patients were randomly divide into Shock wave therapy group (25 patients were treated with the shock wave energy, 200 shots/spot at 0.09 mJ/mm2 for 9 spots, amount to 9 times within 3 month) and control group (20 patients were not treated with shock wave energy). The testing time points of patients in shock wave therapy group were before shock wave therapy (0 month), the end of nine times of shock wave therapy (3 month), and the corresponding testing time points of patients in control group were the time of enrolment, 3 months follow-up. Patients in both groups were subjected to cardiac double-nuclide single photon emission CT (SPECT) examinations using 99Tcm-methoxyisobutylisonitrile (99Tcm- MIBI), 18F-fluro-deoxyglucose (18F-FDG) and microvolt T wave alternans (MTWA) examination, and their Canadian Cardiovascular Society (CCS) angina grading, New York Heart Assosiation (NYHA) cardiac function grading, Seattle Angina Questionnaire (SAQ) scoring, nitroglycerin dosage, 6 min walk test (6MWT), Left ventricular ejection fraction (LVEF) were evaluated at the time ponits above. During of clinical follow-up was not less than 3 months, changes of mortality, myocardial re-infarction rate, readmission rate, myocardial perfusion, myocardial metabolism and cardiac function of pations in the two groups were compared. Results All 45 patients completed follow-up. After treatment of CSWT, the total score of myocardial perfusion imaging and myocardial metabolism imaging, NYHA cardiac function grading, CCS angina grading, nitroglycerin dosage, SAQ scoring, 6MWT, LVEF and MTWA of patients in shock wave therapy group at the time points of 3 months were all significantly improved when compared to those at the time point of 0 month (28.16±4.63 score vs 33.72±5.84 score, 22.88±3.17 score vs 28.28±4.89 score, 1.48±0.65 vs 2.16±0.69, 1.46±0.58 vs 2.72±0.46, 1.00±0.73 times/week vs 2.35±0.86 times/week, 76.40±8.65 score vs 65.96±11.78 score, 427.92±63.32 m vs 339.44±83.37 m, 56.16±6.38% vs 51.88±7.18%, 37.88±9.54 µV vs 44.80±12.24 µV, p all <0.05) and those in control group at the same time points (p all <0.05). But in control group, all the above parameters have no significant change compare with 0 month (p all>0.05). During follow-up, no death and myocardial re-infarction was found in shock wave therapy group after treatment. 1 patient died in control group because of SCD and 1 patient suffered from AMI. Eleven person-time suffered from readmission, 3 person-time of the shock wave therapy group, 11 person-time of the control group (p<0.05). Conclusions Extracorporeal cardiac shock wave therapy is a safe, non-invasive and effective therapeutic option for CAD.