Miracle-dz/UniFAR-FTUs huggingface dataset:
The Use of Polyacrylamide as a Selective Depressant in the Separation of Chalcopyrite and Galena

High molecular weight polyacrylamide (PAM) was tested as a potential selective depressant in the differential flotation separation of galena and chalcopyrite using potassium ethyl xanthate (KEX) as a collector. In single mineral flotation, PAM depressed chalcopyrite while galena was floatable. Mechanism study indicated that PAM could adsorb on galena through hydrogen bonding, and on chalcopyrite through hydrogen bonding as well as ammonium-copper complexation. KEX could only break up the galena-PAM bonding. It is the combined use of PAM and KEX that caused the selectivity. In mineral mixture flotation, galena and chalcopyrite could be separated by PAM and KEX only after EDTA treatment of the mineral mixtures. Time of flight secondary ion mass spectrometric (ToF-SIMS) measurements indicated that when galena and chalcopyrite were present together in the suspension, PAM adsorbed on both galena and chalcopyrite. However, after prior treatment of the mineral mixture by EDTA, PAM mainly adsorbed on chalcopyrite. ACKNOWLEDGEMENT First and foremost, I would like to express my deepest gratitude to my supervisor, Dr. Qi Liu, for his guidance, patience and encouragement throughout the project. I really have learned a lot from his invaluable guidance during the past two and half years. It has been my great honor to be his student. The financial support provided by Canadian Center for Clean Coal/Carbon and Mineral Processing Technology (C 5 MPT) is gratefully acknowledged. During the course of this project, Dr. Mingli Cao, Dr. Anqiang He, Dr. Shihong Xu (ACSES) and Mr. Shiraz Merali have helped me with the testwork, which I really appreciate. Last but not the least, I am indeed grateful to all my group members, Dr. Kaipeng Wang, Dr. Min Tang, Ph.D. students Jihua Gong, Xiao Ni and Peng Huang, M.Sc. students Marc Parrent and Huiran Wang, for their friendship and encouragement. Table of
Cuban Subterranean Termite (proposed), Florida Dampwood Termite (old unofficial name), Prorhinotermes simplex (Hagen) (Insecta: Isoptera: Rhinotermitidae)

The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county’s UF/IFAS Extension office.
Drying of grape pomace with a double pass solar collector

ABSTRACT This study aims to analyze the performance of a novel design of the double pass solar air collector (DPSAC)-assisted drying system and investigate the drying kinetics of grape pomace which is an agricultural by-product. The samples were dried to a moisture content of 0.01 g water/g dry matter between 100 and 250 min depending on the weather conditions. The average thermal efficiencies of DPSAC were calculated as 79.77, 79.85, and 69.46%. Average values of the coefficient of performance of DPSAC were determined as 5.32, 5.13, and 4.32. The highest specific moisture extraction rate value was achieved as 617.18 g water/kWh. Whereas the mass transfer coefficient (hm) values ranged from 9.15E−11 to 1.04E−7 m/s, the effective moisture diffusivity (De) values were obtained between 3.04E−13 and 1.02E−10 m2/s. The qualitative analysis showed that the drying using DPSAC may be an alternative for drying applications in terms of short drying time and energy usage. Nevertheless, these results clearly suggest a complex and effective interplay between thermal performance and drying kinetics.
Analysis of recent surface deformation at Ischia Island Volcano (South Italy) via multi-platform monitoring systems

Ischia Island is a densely populated volcanic area located in the North-Western sector of the Gulf of Napoli (South Italy), whose activity is characterized by eruptions (the last one occurred in 1302 A.D.), earthquakes (the most disastrous ones occurred in 1881 and in 1883), fumarolic-hydrothermal manifestations and ground deformation. In this work we carry out the surface deformation time-series analysis occurring at the Island by jointly exploiting data collected via two different monitoring systems. In particular, we take advantage from the large amount of periodic and continuous geodetic measurements collected by the GPS (campaign and permanent) stations deployed on the Island and belonging to the INGV-OV monitoring network. Moreover, we benefit from the large, free and open archive of C-band SAR data acquired over the Island by the Sentinel-1 constellation of the Copernicus Program, and processed via the advanced Differential SAR Interferometry (DInSAR) technique referred to as Small BAseline Subset (SBAS) algorithm [Berardino et al., 2002]. We focus on the 2014-2017 time period to analyze the recent surface deformation phenomena occurring on the Island, thus extending a previous study, aimed at investigating the temporal evolution of the ground displacements affecting the Island and limited to the 1992-2003 time interval [Manzo et al., 2006]. The performed integrated analysis provides relevant spatial and temporal information on the Island surface deformation pattern. In particular, it reveals a rather complex deformative scenario, where localized phenomena overlap/interact with a spatially extended deformation pattern that involves many Island sectors, with no evidence of significant uplift phenomena. Moreover, it shows a good agreement and consistency between the different kinds of data, thus providing a clear picture of the recent dynamics at Ischia Island that can be profitably exploited to deeply investigate the physical processes behind the observed deformation phenomena.
Achieving Dalenius' Goal of Data Privacy with Practical Assumptions

Recent studies show that differential privacy is vulnerable when different individuals' data in the dataset are correlated, and that there are many cases where differential privacy implies poor utility. In order to treat the two weaknesses, we traced the origin of differential privacy to Dalenius' goal, a more rigorous privacy measure. We formalized Dalenius' goal by using Shannon's perfect secrecy and tried to achieve Dalenius' goal with better utility. Our first result is that, if the independence assumption is true, then differential privacy is equivalent to Dalenius' goal, where the independence assumption assumes that each adversary has no knowledge of the correlation among different individuals' data in the dataset. This implies that the security of differential privacy is based on the independence assumption. Since the independence assumption is impractical, we introduced a new practical assumption, which assumes that each adversary is unknown to some data of the dataset if the dataset is large enough. Based on the assumption, we can achieve Dalenius' goal with better utility. Furthermore, we proved a useful result which can transplant results or approaches of information theory into data privacy protection. We then proved that several basic privacy mechanisms/channels satisfy Dalenuis' goal, such as the random response, the exponential, and the Gaussian privacy channels, which are respective counterparts of the random response, the exponential, and the Gaussian mechanisms of differential privacy. Moreover, the group and the composition properties were also proved. Finally, by using Yao's computational information theory, we extend our model to the computational-bounded case.
Deposition Mechanisms of Cold Gas Dynamic Sprayed MCrAIY Coatings

Thermal-sprayed (i.e. LPPS or HVOF) MCrAlY coatings are widely used for land-based gas turbine applications against high-temperature oxidation and hot corrosion. However, due to requirement for further improvement of turbine efficiency, dense and stable coatings are necessary. The cold spray (also referred to as cold gas dynamic spray) makes it possible to increase coating density, due to high velocity particle impact during spraying. However, deposition mechanisms of cold spraying have not been elucidated yet. In this study, we investigated the deposition mechanisms focused on the behavior of interface between a coating and a substrate. The mechanisms were evaluated by the spray impact phenomena simulation tests, namely laser shock flier impact tests, and STEM-EDX elemental analyses at the interface between the substrate and the cold sprayed coating. From the results of STEM-EDX for as-sprayed coating and of SEM-EDX of the flier specimen, the bonding between the CoNiCrAlY coating and the substrate occurred at the only particular phase combination.
Structure and atomic correlations in molecular systems probed by XAS reverse Monte Carlo refinement

The Reverse Monte Carlo (RMC) algorithm for structure refinement has been applied to x-ray absorption spectroscopy (XAS) multiple-edge data sets for six gas phase molecular systems (SnI2, CdI2, BBr3, GaI3, GeBr4, GeI4). Sets of thousands of molecular replicas were involved in the refinement process, driven by the XAS data and constrained by available electron diffraction results. The equilibrated configurations were analysed to determine the average tridimensional structure and obtain reliable bond and bond-angle distributions. Detectable deviations from Gaussian models were found in some cases. This work shows that a RMC refinement of XAS data is able to provide geometrical models for molecular structures compatible with present experimental evidence. The validation of this approach on simple molecular systems is particularly important in view of its possible simple extension to more complex and extended systems including metal-organic complexes, biomolecules, or nanocrystalline systems.
Poloxamer 407 Hydrogels for Intravesical Instillation to Mouse Bladder: Gel-Forming Capacity and Retention Performance

Purpose: Poloxamer 407 (P407) thermo-sensitive hydrogel formulations were developed to enhance the retention time in the urinary bladder after intravesical instillation. Materials and Methods: P407 hydrogels (P407Gels) containing 0.2 w/w% fluorescein isothiocyanate dextran (FD, MW 4 kDa) as a fluorescent probe were prepared by the cold method with different concentrations of the polymer (20, 25, and 30 w/w%). The gel-forming capacities were characterized in terms of gelation temperature (G-Temp), gelation time (G-Time), and gel duration (G-Dur). Homogenous dispersion of the probe throughout the hydrogel was observed by using fluorescence microscopy. The in vitro bladder simulation model was established to evaluate the retention and drug release properties. P407Gels in the solution state were administered to nude mice via urinary instillation, and the in vivo retention behavior of P407Gels was visualized by using an in vivo imaging system (IVIS). Results: P407Gels showed a thermo-reversible phase transition at 4°C (refrigerated; sol) and 37°C (body temperature; gel). The G-Temp, G-Time, and G-Dur of FD-free P407Gels were approximately 10°C–20°C, 12–30 seconds, and 12–35 hours, respectively, and were not altered by the addition of FD. Fluorescence imaging showed that FD was spread homogenously in the gelled P407 solution. In a bladder simulation model, even after repeated periodic filling-emptying cycles, the hydrogel formulation displayed excellent retention with continuous release of the probe over 8 hours. The FD release from P407Gels and the erosion of the gel, both of which followed zero-order kinetics, had a linear relationship (r=0.988). IVIS demonstrated that the intravesical retention time of P407Gels was over 4 hours, which was longer than that of the FD solution (<1 hour), even though periodic urination occurred in the mice. Conclusions: FD release from P407Gels was erosion-controlled. P407Gels represent a promising system to enhance intravesical retention with extended drug delivery. (Korean J Urol Oncol 2017;15:178-186) 󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏󰠏
Electrophoretic kinetics of nanomullite, nanoSiC and their composite suspensions

In detail characterisation of suspensions including nanomullite, nanosilicon carbide and various percentages of their composites has been studied in this Letter. Mechanism of particle ionisation, alternate pH and surface charge, particle size distribution, zeta potential, current density, electrophoresis movement and kinetics of time–weight curves has been studied, thoroughly. It was illustrated that triethanolamine cannot stabilise powders as well. However, poly-vinyl pyrrolidone could stabilise the particles as well but the particles could not move easily in the presence of applied electrical field due to the lack of enough surface charge. In this case, iodine (I) could be utilised as the preferred surfactant due to good stability and enough surface charge even though it could increase the concentration of free ions and conductivity of particles may be decreased. It was also found that in the case of utilising optimum surfactant, the amount of zeta potential for mullite suspension is more than composite powder and these two have a greater zeta potential than SiC suspension. Last but not least, it was found that the velocity of deposition reduces by increasing the time and its reduction depends on resistance and permittivity of suspension.
Antibacterial activity of Ag and Cu nanoparticles synthesized by chemical reduction method: a comparative analysis

In the present study, silver and copper nanoparticles were synthesized by using chemical reduction method. TGA was used to know the thermal stability and it was found that silver nanoparticles were more stable than copper nanoparticles. It was also observed from thermogram that copper nanoparticles gained small weight at 450 °C due to oxidation. DSC curves showed the peaks of endothermic and exothermic reactions that indicated the chemical changes inside nanoparticles. RD peaks demonstrated the face centered cubic crystal structure with crystallite size 15.13 nm and 14.45 nm of silver and copper nanoparticles, respectively. XRD also showed the partial oxidation of copper nanoparticles (Cu2O). Spherical morphology with average grain size ranging 120–300 nm of silver nanoparticles and 150–350 nm of copper nanoparticles was observed by SEM. It was found that silver and copper nanoparticles are significant antibacterial agent against common human pathogenic bacteria like Staphylococcus aureus and Escherichia coli. It was observed that antibacterial activity increased as concentration of samples increased. Maximum zone of inhibition was observed by silver nanoparticles at concentration 0.24 g ml−1. Copper nanoparticles results were comparable with silver nanoparticles against S. aureus but showed slightly less antibacterial action against E. coli. It was observed that silver nanoparticles were more reactive to inhibit the growth of bacteria as compared to copper nanoparticles.
Improvement Of Work Posture In Yarn Removal Operator To Reduce Risk Of Musculoskeletal Disorders

The highest number of industrial workers who experience Musculoskeletal Disorders is in the garment industry, which is equal to 65.2%. PT. Panen Mas Jogja is a company engaged in the garment sector. PT. Panen Mas Jogja has a production target per day of 720 products for each line. But actually, the average of product that cannot be achieved is 34.32%. Based on the assessment of work posture using REBA method, it is known that 71% of the work elements need improvement, 19% of the work elements may need improvement and 10% of the elements need to be improved immediately. The work element that has the highest risk of posture is then assessed using the NBM questionnaire. Based on the assessment, the work element of taking the product and putting the product in the yarn removal activity have the highest final score of 72. Because these work elements have the same work station, improvement will be made for the yarn removal activity.
Multi Label Deep Learning classification approach for False Data Injection Attacks in Smart Grid

The smart grid replaces the traditional power structure with information inventiveness that contributes to a new physical structure. In such a field, malicious information injection can potentially lead to extreme results. Incorrect, FDI attacks will never be identified by typical residual techniques for false data identification. Most of the work on the detection of FDI attacks is based on the linearized power system model DC and does not detect attacks from the AC model. Also, the overwhelming majority of current FDIA recognition approaches focus on FDIA, whilst significant injection location data cannot be achieved. Building on the continuous developments in deep learning, we propose a Deep Learning based Locational Detection technique to continuously recognize the specific areas of FDIA. In the development area solver gap
Quantitative analysis of positron emission tomography (PET) with the second generation translocator protein (TSPO) ligand [18F]GE-180

2.1 Purpose: Over the past 20 years, the role neuroinflammation (NI) plays in many neurodegenerative diseases, including Alzheimer’s disease, has become increasingly recognised. As such, being able to image NI non-invasively in patients is critical to monitor pathological processes and potential therapies targeting neuroinflammation. The translocator protein (TSPO) has proven a reliable NI biomarker for positron emission tomography (PET) imaging. However, if TSPO imaging in acute conditions such as stroke provides strong and reliable signals, TSPO imaging in neurodegenerative diseases has proven more challenging. Here, we report results comparing the recently developed TSPO tracers [18F]GE-180 and [18F]DPA-714 with [11C]-(R)-PK11195 in a rodent model of subtle focal inflammation. Procedures: Adult male Wistar rats were stereotactically injected with 1μg lipopolysaccharide (LPS) in the right striatum. Three days later, animals underwent a 60-minute PET scan with [11C]-(R)-PK11195 and [18F]GE-180 (n = 6) or [18F]DPA-714 (n = 6). Ten animals were scanned with either [18F]GE-180 (n = 5) or [18F]DPA-714 (n = 5) only. Kinetic analysis of PET data was performed using the simplified reference tissue model (SRTM) with a contralateral reference region or a novel data-driven input to estimate binding potential BPND. Autoradiography and immunohistochemistry were performed to confirm in vivo results. Results: At 40-60 minutes post-injection, [18F]GE-180 dualscanned animals showed a significantly increased core/contralateral uptake ratio vs. the same animals scanned with [11C]-(R)-PK11195 (3.41±1.09 vs. 2.43±0.39, p = 0.03); the same measure in [18]DPA-714dual-scanned animals was not significantly higher than [11C]-(R)-PK11195 (2.80±0.69 vs. 2.26±0.41). There was no significant difference between [18F]GE-180 and [18F]DPA-714 scanned animals (p=0.47). Kinetic modelling with a contralateral reference region identified significantly higher BPND in the core of
Blank overcorrection in ICP-MS – influence of the torch material used on the molar mass of highly enriched silicon and on the redefinition of the kilogram

Molar mass (M) measurements of silicon highly enriched in 28Si carried out in the framework of the upcoming redefinition of the kilogram and mole were performed both with a specially designed sapphire torch almost free of natural silicon and a conventional torch completely built from quartz using a high resolution multicollector-inductively coupled plasma mass spectrometer (MC-ICP-MS). In both cases, relative uncertainties (urel(M)) were in the 10−9 range. M measured using the quartz assembly was systematically shifted to lower values by −3 × 10−6%, which is thirteen times the combined standard uncertainty of M measured with the sapphire assembly. This effect can be explained by the silicon released from the injector tube surface by the blank solution (aqueous tetramethylammonium hydroxide, TMAH) used to correct for the load of natural silicon in the samples and blends (containing the sample and 30Si spike) necessary to avoid the otherwise large bias of the isotopic pattern of the enriched silicon in the presence of the ubiquitous silicon with natural isotopic composition. The TMAH solution mobilizes the silicon from the injector tube in the torch most prominently. In the case of silicon containing sample solutions, these are saturated due to the extreme content of Si, 5000 μg g−1 in the sample x and 3000 μg g−1 in the blend bx. The additional Si load during the blank measurements induced an overcorrection of the isotope ratios in the case of the quartz assembly.
Broadband graphene-based metamaterial absorbers

In this paper, a new type of broadband tunable metamaterial absorber is proposed. The structure consists of a single-layer ring graphene and a metal ground plane separated by a dielectric spacer. The graphene rings are connected each other to be easily tuned by the voltage. In addition, this absorber is polarization-independent at normal incidence due to the symmetric pattern of the unit cell. Results reveal the bandwidth of 90% absorption reaches to 2.25 THz for a single-ring structure. The bandwidth of 90% absorption increases to 3.2 THz by combining two similar rings with different sizes in one unit cell. The physical mechanism of the single-ring and dual-ring absorbers are given based on the impedance matching theory.
Carbohydrate-protein interactions characterized by dual polarization hybrid plasmonic waveguide

Abstract Optical biosensors present good performance for the affinity analysis of a molecular binding event. However, most of those excited with single optical mode are “blind” to the conformational change of bound molecules. We theoretically demonstrate a dual polarization hybrid plasmonic (DPHP) waveguide with nano-slots. By addressing the structure with dual polarizations, the optogeometrical properties (density and thickness) of protein layers have been determined without ambiguity. Differences in the hybrid mode dispersion between the transverse electric (TE) and transverse magnetic (TM) modes allow to separately determine the thickness and the density at all stages during the molecular interaction. In addition, nano-slots can be equated with an effective optical capacitance resulting in a strong field confinement; thereby, subtle changes in the ambient medium can be sensed. A proof of concept is conducted by analyzing the conformational change of HepV, a recombinant fragment of collagen V, during complicated molecular interaction. Integrated with adlayer thickness and density, we can conclude that a thick sparse layer formed after heparin capture and a thin dense layer arising from HepV bound. Accordingly, HepV undergoing conformational change has been traced and verified as molecular interaction occurs.