Miracle-dz/UniFAR-FTUs huggingface dataset:
Hydrophilic dual‐responsive magnetite/PMAA core/shell microspheres with high magnetic susceptibility and ph sensitivity via distillation‐precipitation polymerization

A facile and effective approach to preparation of dual-responsive magnetic core/shell composite microspheres is reported. The magnetite(Fe3O4)/poly(methacrylic acid) (PMAA) composite microspheres were synthesized through encapsulat- ing c-methacryloxypropyltrimethoxysilane (MPS)-modified magnetite colloid nanocrystal clusters (MCNCs) with cross- linked PMAA shell. First, the 200-nm-sized MCNCs were fabri- cated through solvothermal reaction, and then the MCNCs were modified with MPS to form active vinyl groups on the surface of MCNCs, and finally, a pH-responsive shell of PMAA was coated onto the surface of MCNCs by distillation-precipita- tion polymerization. The transmission electron microscopy (TEM) and vibrating sample magnetometer characterization showed that the obtained composite microspheres had well- defined core/shell structure and high saturation magnetization value (35 emu/g). The experimental results indicated that the thickness and degree of crosslinking of PMAA shell could be well-controlled. The pH-induced change in size exhibited by the core/shell microspheres reflected the PMAA shell contained large amount of carboxyl groups. The carboxyl groups and high saturation magnetization make these microspheres have a great potential in biomolecule separation and drug carriers. Moreover, we also demonstrated that other magnetic poly- meric microspheres, such as Fe3O4/PAA, Fe3O4/PAM, and Fe3O4/PNIPAM, could be synthesized by this approach. V C 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 2725-2733, 2011
Preparation of Epoxy Resin Based on 1,5-Naphthalenediol and Its Application in Carbon Fiber-Reinforced Composites

A series of new epoxy resin base on 1,5-naphthalenediol were prepared to produce the heat-resistant carbon fiber-reinforced composites. The structures of the epoxy resins were characterized by Fourier Transform Infrared (FTIR) spectroscopy and Gel Permeation Chromatography (GPC) analyses. Dynamic curing behavior was investigated using Differential Scanning Calorimetry (DSC). The physical properties of the cured polymers were evaluated with Dynamic Thermal Mechanical Analyses (DMTA) and Thermogravimetric Analyses (TGA). The results showed that the cured polymer exhibited a higher glass transition temperature (Tg) of 251.1°C and better thermal stability. Such properties make the resin highly promising for heat-resistant composite applications.
Assessment of free energy expressions in RISM integral equation theory: theoretical prediction of partition coefficients revisited

We assess the performance of free energy expressions so far available in the reference interaction site model (RISM) integral equation theory. Free energies of solvation in aqueous and chloroform solutions along with the partition coefficients of them are calculated for 16 organic molecules. Static polarity effects are included using hybrid RISM and Hartree–Fock methods. Our best estimates are obtained from the expression of the distributed partial wave expansion that leads to the standard deviations less than 1.3 kcal mol−1 and 1.1 in the solvation free energies and partition coefficients, respectively.
Experimental investigation of the de-inking of recycled newspaper using plastic particles

The effect of the type of plastic particles, its average diameter, and its total surface area on the de-inking of recycled newspaper was investigated. It was found that plastics vary in their ability to remove ink. Among the various types of plastics examined, low density polyethylene (QAPCO) was found to have the largest capacity of ink removal. Ink removal versus plastic particle size was found to go through a maximum. Studying the effect of the total surface area of plastic particles on de-inking shows that a limiting surface area exists above which no more ink can be separated.
REVIEWING ANTAGONISTIC ACTINOMYCETES IN THE ERA OF DRUG RESISTANCE

Actinomycetes are the limitless source of newer chemical scaffolds and proved its effectiveness in diverse clinical applications. More than 10,000 structurally defined and experimentally proved antimicrobials are from the Actinomycetes. Among actinomycetes, approximately 55 % of the antimicrobial agents are obtained from the genus Streptomyces. Importance of Actinomycetes derived antibiotics is largely ignored because of its tedious process of isolation from various natural habitats leading to the discovery of previously explored genera. However, newer techniques are to be explored for effective isolation of Actinomycetes producing novel antibiotics. Enhanced cultivation methods proved beneficial in the detection and cultivation of novel bioactive Actinomycetes and modern molecular biology techniques proved beneficial in the target-specific search of antimicrobial Actinomycetes. Discovery and development of antibiotics form the Actinomycetes are of significant interest due to the mounting necessity of newer antibiotics. This review focuses on the diverse sources of antibiotics from Actinomycetes and its isolation.
Photoelectron Mean Free Path on the EXAFS Analyses for Nanoparticles

We calculate the inelastic mean free path (IMFP) for small metal particles based on the plasmon model for free electron gas confined in small sphere with radius a. The IMFP decreases with the radius a smaller than about 100 ˚ and the rate of the decrease depends on the bulk plasmon energy ! p. We furthermore discuss the coordination numbers obtained from the EXAFS curve fitting method for small Ag particles. We find the importance of the size dependent IMFP for EXAFS analyses in order to obtain reliable coordination numbers in nanoparticles. [DOI: 10.1380/ejssnt.2012. 565]
Communications-Caching-Computing Resource Allocation for Bidirectional Data Computation in Mobile Edge Networks

A novel bidirectional computation task model has emerged as an important use case of 5G. For example, interactive AR/VR gaming service needs to render the live scene by jointly computing user features such as 3D positions and video data generated from the Internet. In this article, we consider the bidirectional computation task model, where each task is served via three mechanisms, i.e., local computing with local caching, local computing without local caching, and computing at the mobile edge computing server. To minimize the average bandwidth, we formulate the joint caching and computing optimization problem under the latency, cache size and average power constraints. In the homogeneous scenario, we derive the optimal policy and analytical expression for the minimum bandwidth. In the heterogeneous scenario, to reduce the computation complexity of the NP-hard problem, we relax some constraints of the original problem and propose a Lagrangian relaxation (LR) suboptimal solution, which may be infeasible. We then reformulate the original problem as an auxiliary problem based on the LR solution and solve this via Concave-Convex Procedure (CCCP), which outputs feasible local optimal solution. Simulation has shown that LR-based algorithms outperform the baselines including greedy and CCCP algorithms in the bandwidth performance and time efficiency.
A dye-sensitized nano-porous solid-state photovoltaic cell

A photovoltaic cell was fabricated by sandwiching a monolayer of the pigment cyanidin adsorbed on nano-porous n-TiO2 film (deposited on conducting tin oxide glass) within a transparent polycrystalline film of p-CuI, filling the intercrystallite pores of the porous n-TiO2 film. Photoexcited dye is found to inject electrons into n-TiO2 and holes into p-Cul, generating photocurrents and photovoltages that are impressively high for a dye-sensitized solid-state photovoltaic cell.
DBATES: DataBase of Audio features, Text, and visual Expressions in competitive debate Speeches

In this work, we present a database of multimodal communication features extracted from debate speeches in the 2019 North American Universities Debate Championships (NAUDC). Feature sets were extracted from the visual (facial expression, gaze, and head pose), audio (PRAAT), and textual (word sentiment and linguistic category) modalities of raw video recordings of competitive collegiate debaters (N=717 6-minute recordings from 140 unique debaters). Each speech has an associated competition debate score (range: 67-96) from expert judges as well as competitor demographic and per-round reflection surveys. We observe the fully multimodal model performs best in comparison to models trained on various compositions of modalities. We also find that the weights of some features (such as the expression of joy and the use of the word we) change in direction between the aforementioned models. We use these results to highlight the value of a multimodal dataset for studying competitive, collegiate debate.
Analysis of the possibility to control complex semiconductors properties by shock wave treatment

This paper is dedicated to the experimental investigation of laser-induced shock waves impact on electrical, photoelectric and mechanical parameters of narrow-gap Hg1–xCdxTe alloys. A mechanism of defect structure rebuilding under the laser shock waves effect is developed. The proposed mechanism manifests itself in one of two dominant ways depending upon the processing mode. The two modes considered involve inducing shock waves by either a single laser pulse or a multi-spike laser pulse.
Methylxanthines. I. Anhydrous Theophylline

Clear crystals of anhydrous theophylline (3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione), C 7 H 8 N 4 O 2 , were grown by sublimation and the X-ray structure determined. The planar molecules are stacked in columns along [010] and are inclined at an angle of 26.05 (10)° relative to (010). The melting point has been determined to be 548.8 (5) K.
Renner-Teller and spin-orbit interactions between the 1A1, 1B1 and 3B1 states of CH2

The [btilde]1B1-a1A1 spectrum of the CH2 radical exhibits singlet-triplet perturbation of the a and the [btilde] states, even though the direct first-order interaction between the [btilde]1B1 and [Xtilde]3B1 states is forbidden. We have derived a model for such interactions that involves both Renner-Teller and spin-orbit coupling. The results of calculations made using this model show that the effect of the Renner-Teller coupling is to generate 1B1-3B1 interactions that are as large as those between the 1A1 and 3B1 states. These effects are much larger than those normally expected when second-order singlet-triplet coupling occurs. From these calculations, we have identified the triplet-state levels responsible for the [btilde]-[Xtilde] perturbations, and have refined the triplet-state potential.
Enhanced Visible Light Photocatalysis of Bi2O3 upon Fluorination

For the better utilization of solar light and complete oxidation of environmental organic pollutants, it is desired to develop small band gap semiconductors with a deep valence band as efficient visible light photocatalysts. In this work, we prepared the fluorinated Bi2O3 catalysts using a precipitation method, followed by a solvothermal process in the presence of NH4F. The fluorinated Bi2O3 catalysts, especially with the atomic ratio of F to Bi (RF) at 0.2, exhibit much higher photocatalytic activities than the pure Bi2O3 for the degradation of methyl orange (MO) under the visible light irradiation. The effects of the fluorination on the phase structure, special surface areas, morphologies, optical properties, surface-adsorbed species, and electronic band structure of the Bi2O3 were investigated in detail. It was revealed that both the surface-adsorbed and lattice-substituted fluorine, induced by the fluorination to Bi2O3, play critical roles in the enhanced photocatalytic performance of the fluorinated .
Cost analysis of coronary artery bypass grafting surgery under single-payer reimbursement in Taiwan

ABSTRACT In the aging world, coronary artery disease is the leading cardiovascular disease burden. Coronary artery bypass surgery grafting (CABG) entails high medical costs. Identifying the driving factors of medical cost variability is essential for health policies and the enhancement of quality of care. We conducted this study using data from the National Health Insurance Research Database (NHIRD) in the Longitudinal Health Insurance Database 2005, which includes 1 million randomly selected individuals from the 2005 registry of beneficiaries for their medical records collected between January 2000 and December 2013. We analyzed the in-hospital and one-year follow-up medical costs of patients with isolated CABG. Multiple linear regression models were developed to identify the effects of patient characteristics, comorbidities, and hospital-related factors on the surgical costs and the total one-year medical costs after discharge.Female patients had significantly higher surgical costs and higher one-year medical costs after discharge. Hospital volume, surgeon’s age, surgeon’s operation volume and the number of anastomosis vessels affected CABG outcomes considerably. Both the surgeon’s age and volume negatively affected the one-year medical costs after discharge. Charlson comorbidity index (CCI), recent one-year medical costs before surgery, emergency surgery and extracorporeal membrane oxygenation (ECMO) use were correlated with higher one-year medical costs after discharge. Using multiple linear regression models could explain part of the variances for the one-year medical costs after discharge using fewer factors. We found that surgical cost and recent one-year medical costs before CABG were the most crucial predicting factors for the one-year medical costs after discharge. Cost analysis about the variations of in-hospital and recent one-year costs before CABG is essential information for determining health policy and further improving clinical quality.
Dasar-dasar Manajemen dan Bisnis

Saat ini dimana banyak pihak memberdayakan UMKM dan juga pentingnya berwirausaha maka pasti tak lepas dari sebuah ilmu mengenai bisnis. Dimana dasar manajemen dan bisnis penting untuk dipahami dan menjadi acuan bagi seseorang yang ingin menjalankan bisnisnya. Selain itu kurikulum di Perguruan Tinggi pada beberapa Program Studi memasukkan manajemen bisnis sebagai salah satu Mata Kuliah. Isi buku ini mencakup konsep dasar manajemen, organisasi, dan kepemimpinan, perkembangan konsep manajemen, fungsi-fungsi manajemen yang meliputi perencanaan, pengorganisasian, koordinasi dan rentang manajemen, pengarahan, pemotivasian, dan pengawasan. Dibahas pula mengenai manajemen mutu diakhir bab. Setiap bab disertakan studi kasus agar membantu pembaca supaya lebih mudah memahami dari sisi praktisnya. Penulis berharap buku sederhana ini dapat menjadi acuan bagi yang ingin memulai bisnisnya maupun sebagai referensi mahasiswa dalam memahami dasar manajemen dan bisnis.
An Enzymatically Synthesized Conducting Molecular Complex of Polyaniline and Poly(vinylphosphonic acid)

Enzymatic synthesis of a conducting complex of polyaniline (PANI)−poly(vinylphosphonic acid) (PVP) is presented. The polymerization of aniline was carried out in an aqueous buffer at pH 4.0 using the enzyme horseradish peroxidase (HRP) as the biocatalyst in the presence of a PVP polyanion template. The formation of the conducting and electroactive form of the PVP−PANI complex was confirmed through UV−vis and FTIR spectroscopy, elemental analysis, four-point probe conductivity measurements, and thermogravimetric analysis. Appropriate control of polymerization could be used to tune the water solubility and conductivity of the final PVP−PANI macromolecular complex. This template-guided enzymatic reaction is a unique approach for the controllable polymerization of aniline to the electroactive form under milder and environmentally compatible conditions. In this work, PVP was chosen as the polyelectrolyte to demonstrate both versatility with other templates and as a proof-of-concept for extension of this approa.
Electrostatic Contributions to Chain Stiffness and Excluded-Volume Effects in Sodium Hyaluronate Solutions

Intrinsic viscosities [η] for sodium hyaluronate in aqueous sodium chloride at 25°C were determined for 12 samples ranging in weight-average molecular weight Mw from 3.8×103 to 3.5×105 at NaCl concentrations Cs between 0.005 and 2.5 M. They were analyzed on the basis of the Yamakawa-Fujii-Yoshizaki theory for [η] of an unperturbed wormlike chain combined with the Yamakawa-Stockmayer-Shimada theory for excluded-volume effects to estimate the total persistence length q and the excluded-volume strength B as functions of Cs. At any Cs studied, excluded-volume effects on [η] became appreciable when Mw exceeded 1×104–2×104. The Cs dependence of q yielded 4.0 nm for q0 (the intrinsic persistence length) of the polysaccharide chain at infinite ionic strength. It was found that the values of q−q0 (i.e., the electrostatic contribution to q) at Cs<0.02 M were roughly 70% larger than predlcted by the Le Bret theory and the Odijk-Skolnick-Fixman theory. On the other hand, the estimated B values agreed fairly well with Fixman and Skolnick’s theory for the excluded-volume interaction between a pair of charged rodlike segments unless Cs was lower than 0.05 M.
Equilibrium Calculations for Coexisting Liquid Phases

Modeling of reservoir processes in gas miscible flooding may require that phase equilibrium between multiple liquid fluid phases are taken into consideration. Under certain conditions 2 hydrocarbon-liquid phases may form. Therefore, it may become desirable to account for mass transfer between the hydrocarbon and the aqueous phases. This work describes a refined successive substitution method for calculating multiphase flash equilibrium. The phase behavior is assumed to be described by an equation of state. The solution procedure proceeds in a stepwise manner and additional phases are introduced via a special testing scheme based on phase fugacities. This avoids trivial solutions and insures continuity across phase boundaries. The method has been tested on various 3- and 4-phase systems, and examples of application show that the method performs well. 11 references.
Characterization of a Reverse Hexagonal Lyomesophase by a PGSE NMR Water Self-Diffusion Study

Pulsed field gradient spin−echo (PGSE) FT-NMR experiments have been performed in order to characterize the structure of a reverse hexagonal lyomesophase of a nonionic surfactant−water−oil system, weakly charged. The nonionic surfactant system contains pentaethylene glycol dodecyl ether (C12E5), water, decane, and small amounts of an ionic surfactant, sodium dodecyl sulfate (SDS). The observed spin−echo attenuation due to water self-diffusion at different temperatures and compositions has been interpreted with a one-dimensional diffusion model, i.e., a self-diffusion in randomly oriented array of capillaries with both transverse dimensions <100 nm. By combining self-diffusion and apparent self-diffusion coefficients, we calculated diffusional “obstruction factors” of about 1/3 and confirmed the presence of a reverse hexagonal microstructure. Unrestricted diffusion behavior has been observed performing PGSE experiments as function of diffusion times. As a consequence, a reverse hexagonal phase with aggregat.
An enhanced exponential reaching law based sliding mode control strategy for a three phase ups system

UPS is used to deliver a high quality sinusoidal waveform to consumers without any interruptions. This work proposes an Enhanced Exponential Reaching Law (EERL) based Sliding Mode Control (SMC) for a three- phase UPS 30 kVA system used in industrial Applications. The work presents the application of proposed controller on the rectifier side as well as on the inverter side feeding a linear and/or a nonlinear load. Mathematical models of the three phase rectifier (AC/DC) and three phase inverter (DC/AC) are derived. Frequency response characteristics are plotted to observe the system stability using state feedback approach. A DC/DC buck/boost converter is utilised for charging and discharging of battery which acts as a secondary power source for the UPS to feed critical loads. It also maintains power balance. The design of SMC, HOSMC and EERL-SMC are presented. The EERL based SMC is used in this work to obtain a pure sinusoidal waveform with less settling time compared to a conventional SMC. It is robust against sudden changes in load and is more efficient compared to SMC and higher order sliding mode controller (HOSMC). Using EERL, chattering phenomenon can be very much reduced with less steady state error. Chattering is observed through phase plane plots in this paper. The system is presented with both linear and nonlinear loads. A comparison is brought with respect to a classical SMC and a higher order SMC (super twisting algorithm) for a UPS system. EERL-SMC performs better in terms of pure sinusoidal waveform, good tracking, less settling time (4ms) and less steady state error (1.74%) with low THD (0.12%). It can be an alternative to a HOSMC. Simulation studies are presented in PSCAD/EMTDC version 4.6. The system stability conditions are analysed from frequency response plots obtained through MATLR2012b platform.
Systemic Risk and the COVID Challenge in the European Banking Sector

This paper studies the systemic risk contribution of a set of large publicly traded European banks. Over a sample covering the last twenty years and three different crises, we find that all banks in our sample significantly contribute to systemic risk. Moreover, larger banks and banks with a business model more exposed to trading and financial market volatility, contribute more. In the shorter sample characterized by the Covid-19 shock, sovereign default risks significantly affected the systemic risk contribution of all banks. However, the ECB announcement of the Pandemic Emergency Purchasing Programme restored calm in the European banking sector.
A study of fiber extrusion in wet spinning. II. Effects of spinning conditions on fiber formation

A study is carried out to investigate the effects of spinning conditions on fiber formation in the wet-spinning process. The spinning conditions studied are free velocity (and hence free diameter), throughput rate, maximum take-up velocity, jet stretch (the ratio of take-up velocity to free velocity), and filament tension. The coagulating bath temperature and concentration are varied, and three spinnerette diameters are used. The spinning dope is an aqueous solution of polyacrylonitrile in sodium thiocyanate. The present study shows that the coagulating bath concentration influences the spinning tension and maximum take-up velocity. Two thread breakage mechanisms are postulated which take into account the rate of coagulation, spinning tension, and thread velocity. An attempt is made to predict the concentration profile of solvent in the moving filament by simultaneously solving the mass and force balance equations, in which the increase in elongational viscosity along the spinning way is assumed to be mainly due to the hardening process.
VERY UNIFORM AND HIGH ASPECT RATIO ANISOTROPY SIO2 ETCHING PROCESS IN MAGNETIC NEUTRAL LOOP DISCHARGE PLASMA

Magnetic neutral loop discharge (NLD) plasma is a new type for dry etching process characterized by effective coupling of the input electric field electron electron motion near the magnetic neutral loop (NL) region. Therefore, dense plasma can be produced and controlled spatially by changing the position of the NL. Uniformity was controlled by changing the radius of NL temporally during the etching using a repetition frequency of 0.1 Hz, so that the deviation of the SiO2 etch rate was within 2% (3σ) on 200-mm-diam wafer. In nanoscale pattern etching processes, we found that CHF2+ ions played an important role in very high aspect ratio profile etching. In CHF2+ ion-rich plasma, ZEP photoresist patterned 20 nm space was successfully etched 800 nm in depth at the pressure of about 0.3 Pa, using CH2F2, C4F8, and O2.