Miracle-dz/UniFAR-FTUs huggingface dataset:
Nonlinear vibration of knitted spacer fabric under harmonic excitation

Knitted spacer fabrics can be an alternative material to typical rubber sponges and polyurethane foams for the protection of the human body from vibration exposure, such as automotive seat cushions and anti-vibration gloves. To provide a theoretical basis for the understanding of the nonlinear vibration behavior of the mass-spacer fabric system under harmonic excitation, experimental, analytical and numerical methods are used. Different from a linear mass-spring-damper vibration model, this study builds a phenomenological model with the asymmetric elastic force and the fractional derivative damping force to describe the periodic solution of the mass-spacer fabric system under harmonic excitation. Mathematical expression of the harmonic amplitude versus frequency response curve (FRC) is obtained using the harmonic balance method (HBM) to solve the equation of motion of the system. Parameter values in the model are estimated by performing curve fit between the modeled FRC and the experimental data of acceleration transmissibility. Theoretical analysis concerning the influence of varying excitation level on the FRCs is carried out, showing that nonlinear softening resonance turns into nonlinear hardening resonance with the increase of excitation level, due to the quadratic stiffness term and the cubic stiffness term in the model, respectively. The quadratic stiffness term also results in biased vibration response and causes an even order harmonic distortion. Besides, the increase of excitation level also results in elevated peak transmissibility at resonance.
Using XGBoost and Skip-Gram Model to Predict Online Review Popularity

Review popularity is similar to awareness and information accessibility components: Both have a profound effect on customer purchase decisions. Therefore, this study proposes a new method for predicting online review popularity that combines the extreme gradient boosting tree algorithm (XGBoost), to extract key features on the bases of ranking scores and the skip-gram model, which can subsequently identify semantic words according to key textual terms. Findings revealed that written reviews had higher review popularity than non-textual reviews (reviewer and product factors). Moreover, the proposed method achieved higher prediction accuracy than the traditional ridge regression technique of Root Mean Squared Logarithmic Error (RMSLE). The main factors affecting review popularity and key reviewers for specific textual terms were also identified. Findings could help vendors identify key influencers for their product promotion and then support the design of word-suggestion systems for online reviews.
Synthesis and characterization of Fe, Co, and Ni colloids in 2-mercaptoethanol

Metal colloids in 2-mercaptoethanol using nanoparticles (NPs) of iron (Fe), cobalt (Co), and nickel (Ni) were prepared by chemical liquid deposition method. Transmission electron microscopy, electron diffraction, UV-VIS spectroscopy, and scanning electron microscopy with electron dispersive X-ray spectroscopy characterized the resulting colloidal dispersions. The NPs exhibited sizes with ranges from 9.8 nm for Fe, 3.7 nm for Co, and 7.2 nm for Ni. The electron diffraction shows the presence of the metals in its elemental state Fe (0), Co (0), and Ni (0) and also some compounds FeO (OH), CoCo2S4, and NiNi2S4.
Whole Body Low Dose Computed Tomography Using Third-Generation Dual-Source Multidetector With Spectral Shaping: Protocol Optimization and Literature Review

For decades, the main imaging tool for multiple myeloma (MM) patient’s management has been the conventional skeleton survey. In 2014 international myeloma working group defined the advantages of the whole-body low dose computed tomography (WBLDCT) as a gold standard, among imaging modalities, for bone disease assessment and subsequently implemented this technique in the MM diagnostic workflow. The aim of this study is to investigate, in a group of 30 patients with a new diagnosis of MM, the radiation dose (CT dose index, dose-length product, effective dose), the subjective image quality score and osseous/extra-osseous findings rate with a modified WBLDCT protocol. Spectral shaping and third-generation dual-source multidetector CT scanner was used for the assessment of osteolytic lesions due to MM, and the dose exposure was compared with the literature findings reported until 2020. Mean radiation dose parameters were reported as follows: CT dose index 0.3 ± 0.1 mGy, Dose-Length Product 52.0 ± 22.5 mGy*cm, effective dose 0.44 ± 0.19 mSv. Subjective image quality was good/excellent in all subjects. 11/30 patients showed osteolytic lesions, with a percentage of extra-osseous findings detected in 9/30 patients. Our data confirmed the advantages of WBLDCT in the diagnosis of patients with MM, reporting an effective dose for our protocol as the lowest among previous literature findings.
Multidimensional Perspective of Firms’ IT Capability Between Digital Business Strategy and Firms’ Efficiency: A Case of Chinese SMEs

In the contemporary and perpetually changing environment, firms have transformed their business models by integrating advanced digital technologies in which their capabilities contribute crucially. This has evoked competition and challenges especially for small and medium-sized enterprises (SMEs). Therefore, the research aimed to analyze the mediating effect of information technology (IT) capability between digital business strategy and firms’ efficiency. The case of Chinese SMEs was considered specifically. The research was quantitative; therefore, the sample comprised 351 participants accumulated using a survey questionnaire. The mediating effect was tested using structural equation modeling (SEM) where partial mediation of the IT capability was found only in terms of IT proactive stance. Therefore, the research has certain managerial implications specifically in terms of proactive stance as the managers need to initiate the transformation within for efficient performance.
Molecular Conformation of Benzylideneanilines

The non-planar conformations of benzylideneanilines and the almost planar conformations of stilbene and azobenzene are consistently reproduced by a simple model, which takes into account the dependence of π-electron energy and non-bonded interactions on molecular conformation. Other aspects of the molecular geometry of benzylideneanilines. (bond angles influence of p-substituents) are also discussed.
Molecular dynamics simulations of the ice temperature dependence of water ice photodesorption

The ultraviolet (UV) photodissociation of amorphous water ice at different ice temperatures is investigated using molecular dynamics (MD) simulations and analytical potentials. Previous MD calculations of UV photodissociation of amorphous and crystalline water ice at 10 K [S. Andersson et al., J. Chem. Phys. 124, 064715 (2006)] revealed—for both types of ice—that H atom, OH, and H2O desorption are the most important processes after photoexcitation in the uppermost layers of the ice. Water desorption takes place either by direct desorption of recombined water, or when, after dissociation, an H atom transfers part of its kinetic energy to one of the surrounding water molecules which is thereby kicked out from the ice. We present results of MD simulations of UV photodissociation of amorphous ice at 10, 20, 30, and 90 K in order to analyze the effect of ice temperature on UV photodissociation processes. Desorption and trapping probabilities are calculated for photoexcitation of H2O in the top four monolayers .
ROLE OF CHELATORS IN ALLEVIATING OXIDATIVE DAMAGE IN RADISH SHOOT SUBJECTED TO CADMIUM STRESS

Radish ( Raphanus sativus L.) plants were grown with 0, 100 and 150 mg/kg soil cadmium chloride and treated with 100 or 200 mg/l chitosan or humic acid as soil additives to study the responses of leaf area, metabolite accumulation, oxidative stress and enzymatic and non-enzymatic antioxidant physiological processes to cadmium or chelators and to show the influence of chelating application on the alleviation of cadmium chloride induced adverse effects. Results revealed that cadmium stress caused reduction in leaf area, parallel to increased hydrogen peroxide levels, lipid peroxidation and electrolyte leakage in shoot tissues which were significantly reversed by either humic acid or chitosan. The antioxygenic enzymes viz. catalase and peroxidase were significantly decreased due to increasing cadmium concentration. Either humic acid or chitosan induced enzymes activities in shoot tissues of cadmium stressed plants. Proline, ascorbic acid, soluble sugars and total phenol significantly increased due to cadmium chloride or chelators as well as their combinations. Anatomically, either chitosan or humic acid increased the diameter of radish root due to an increase in the thickness of cortex and diameter of vascular cylinder as well as diameter of metaxylem vessel, the thickness of radish leaf blade due to the increase in the thickness of mesophyll tissue as well as thickness of both lower and upper epidermal cells. In addition, the thickness of leaf blade through midrib region was also increased, due to the increase in the midrib vascular bundle thickness, as well as the size of the medvien vascular bundle, area of xylem and phloem tissues. Cadmium stress decreased all anatomical characteristics of root and shoot. It appears clearly that both chelators application partially overcame the depression effect of high cadmium level on the radish root and leaf structure. This finding suggests that both chelators, in particular, chitosan might be activating antioxygenic enzymes and elevating antioxidants thereby controlling free radical generation, hence preventing membrane peroxidation and denaturation of biomolecules resulting into improved leaf area of radish plant grown under cadmium stress.
Preparation, optimisation and characterisation of lignin phenol formaldehyde resin as wood adhesive

Purpose – The purpose of this paper is to examine the preparation of adhesive by incorporation of kraft lignin as an agricultural waste into phenol formaldehyde (PF) resin structure and to evaluate the mechanical properties of lignin phenol formaldehyde (LPF) as wood adhesive.Design/methodology/approach – PF resin (resole) was prepared using sodium hydroxide as a catalyst. Different concentrations of lignin were incorporated into PF resin structure. The effect of lignin concentration, formaldehyde to phenol molar ratio, catalyst concentration, temperature and time upon solid content, adhesive strength and gel time was studied. The kraft lignin, PF and LPF resins were characterised using FT‐IR and thermal analysis.Findings – The incorporation of lignin into PF resin (resole) increases adhesive strength and decreases gel time. The highest adhesive strength and the lowest gel time were achieved at 90 per cent of kraft lignin, formaldehyde to phenol molar ratio, 7.2 and 10 per cent of catalyst, after 4 h and .
Fundamental Behavior of Model Corrosion Inhibitors

Corrosion inhibition is a complex process of great economic importance that has been addressed in both empirical tests in industry and more detailed experiments in academia. Organic corrosion inhibitors are based on surface‐active compounds, which have been investigated thoroughly in colloid and surface science. In this review, the intention is to connect the physicochemical properties of surfactants to their corrosion‐inhibiting performance. The importance of adequate packing of corrosion inhibitors at the metal surface, as well as how the packing can be improved by co surfactants, is adressed. An investigation of the adsorption of corrosion inhibitor to the oil/water interface showed that the interface is capable of consuming considerable amounts of inhibitor when emulsified. The combination of cationic polymers and anionic surfactant proved to adsorb as a well‐covering film, highly efficient in reducing the corrosion rate. The results are most interesting since it shows that a higher inhibiting efficiency can be achieved even at moderate added amounts of these polymers. This is beneficial from both an economic and environmental point of view.
Cold microplasma plume produced by a compact and flexible generator at atmospheric pressure

In this letter, we report a cold microplasma generator at atmospheric pressure excited at 1 kHz in a pin to hole-electrode configuration by using soft materials partly. A nitrogen plasma plume with a length of more than 5 cm can be produced at low electrical power of 0.7 W without high feed gas pressure. The generator exhibits a compact structure with flexible property, which is suitable for treating thermally sensitive materials and biomedical materials, especially for delicate objects in an irregular confined space. Optical emission spectroscopy is used to spatially identify excited species in plasma plume.
Effects of microcapsule constitution on the quality of microencapsulated walnut oil

The encapsulation is a process by which small particles of core products are packaged within a wall material to form microcapsules. One of the most useful processes for drying thermosensitive substances that are unstable in aqueous solutions is the freeze-drying technique (lyophilization), which involves conversion of liquid oils in the form of an emulsion into dry powders. In this paper, the chemical composition of walnut oil and microencapsulation conditions (microcapsule wall material composition) have been evaluated in order to assess the influence of the microencapsulation process on the quality and shelf-life of microencapsulated walnut oil. Highest encapsulation yield was achieved when maltodextrin, carboxymethylcellulose, and lecithin were used as encapsulation agents and the ratio of oil–wall material was 1:1.5. Under these conditions all the oil was encapsulated. The presence of protein constituents in the microcapsule wall material extended the shelf-life of the microencapsulated walnut oil regardless of the use of antioxidant additives.
Comparative nutritional evaluation of fungus and alkali treated rice husk in rat

Feeding trial was conducted with growing white albino rats ( Rattus norvegicus ) for 56 days to determine whether alkali (NaOH) or fungus (Mushroom) treatment of rice husk would affect rat's performance. The treated rice husk comprised 10% of the rat's diets, the rests of which were 50% maize, 20% soybeans, 19% sorghum brewer's dried grain (SBDG), 0.5% salt and 0.5% vitamin-mineral premix. Total dry matter intake was similar (p>0.05) among treatments. The crude protein and ether extract intake of diet B was significantly (p C (19.65) > A (17.06), and the acid detergent fibre intake was 20.01, 13.7 and 15.82 for control (A), B and C respectively. Live weight gain was greatest (p A>C. The crude protein and ether extract digestibilities were increased (p Keywords : rice husk, Pleurotus sajor caju , intake, digestibility Moor Journal of Agricultural Research Vol. 5(2) 2004: 129-134
The Relationship between pH and Heavy Metal Ion Sorption by Algal Biomass

The relationship between pH and heavy metal ion sorption by the biomass of two algal species was studied under controlled experimental conditions. It was observed that increasing heavy metal ion sorption by algal biomass with pH mainly arose from a change in algal cell properties, provided that the pH was below the level where the heavy metal ions started to precipitate. A drastic increase in metal ion sorption capacity (‘inflection point’) was observed at pH 4.5 for the algal biomass used in the study. All the experimental observations on the mutual effects between pH and metal sorption for four heavy metal ions (Cd2+, Cu2+, Pb2+ and Zn2+) and two algal species suggested that the mutual effects between pH and heavy metal ion sorption can be explained in terms of ion exchange and coulombic attraction between the heavy metal ions and the algal biomass. A ‘positive feedback’ was also suggested for the mutual effects between pH and heavy metal ion removal at higher initial pH levels, where the sorption of heavy metal ions may enhance their hydrolysis.
Studies of the electronic and vibrational signatures of the unusual bonding geometries in melt-quenched amorphous silicon

Tight-binding molecular dynamics simulations have been performed to investigate the effect of quenching rate of the Si melt on the resulting local structure of amorphous silicon. Different quenching rates were used to cool liquid silicon in the simulations to demonstrate that the choice of quenching rates significantly influences the resulting local structure. The calculated pair correlation functions show that the local structure is sensitive to the thermal processing of the liquid silicon melt. The use of cooling rates higher than 10−13 K s−1 appears to prevent the activation of the required structural re-arrangements necessary to stabilise the networks, causing unexpected bonding geometries to develop. The electronic signatures of the defects show that only the triangular defect structure contributes resonance states to the conduction band tail. Also, the vibrational signature of the triangular structure shows a high energy transverse optical mode at 95 meV, indicating that the defect is likely to be unstable at 300 K, although both defects contribute minimal states to the mid-gap level.
Dynamic Shape Factor of Nonspherical Aerosol Particles in the Diffusion Regime

Diffusional losses of monodisperse polysterene spheres and doublets from laminar aerosol flows and stagnant aerosols in cylindrical tubes were measured. The losses of spheres were used to determine their diameter (range 69–120 nm) and the volume equivalent diameter of their doublets. The losses of the doublets were used to determine their dynamic shape factor which for randomly oriented doublets was established to be 1.127 ± 0.085 for Knudsen numbers between 1.1 and 2.0.
Gas−Liquid Desorption through Blind-Ended Microporous Hollow Fibers for an Intravascular Artificial Lung

The Penn State Intravascular Lung (PENSIL) consists of thousands of microporous, hollow, polypropylene fibers, each with one end sealed and the other end attached to an oxygen (O 2 ) supply tube which is implanted in a major vein. Since diffusion resistance along the inside of the blind-ended fibers is significant, a hypobaric O 2 supply might enhance the desorption of carbon dioxide (CO 2 ) from blood. Therefore, CO 2 desorption through small-scale PENSIL modules containing 14 polypropylene fibers, 380 μm in diameter and from 0.5 to 5.0 cm in length, was measured as the O 2 supply pressure was varied from 300 to 900 Torr. The fiber modules were mounted in a 1.75-in. -diameter transfer chamber in which water saturated with 760 Torr of CO 2 flowed around the fibers at 1.2 or 3.4 L/min. At atmospheric pressure, the CO 2 desorption rate leveled off with increasing fiber length. At hypobaric conditions, however, the rate of CO 2 desorption increased linearly with fiber length, and was as much as eight times greater than at atmospheric pressure. These data were analyzed with a one-dimensional binary diffusion model that utilized an overall mass transfer coefficient as a free parameter. The best estimates of the coefficient (20-40 μm/s) were independent of gas pressure but varied with fiber length.
Hot gas cleaning and upgrading with a calcined dolomite located downstream a biomass fluidized bed gasifier operating with steam-oxygen mixtures

Cleaning and upgrading of the hot raw gas from a biomass gasifier, bubbling fluidized bed type, is studied at small pilot plant scale (10 kg biomass fed/h) using a calcined dolomite located downstream from the gasifier. Gasification is made with steam−oxygen mixtures at 800−850 °C and atmospheric pressure. Main variables studied are the gas residence time in the bed of dolomite and the gas atmosphere composition, which depends on the gasifying agent (H2O + O2)-to-biomass and H2O/O2 ratios. H2 and CO content in the flue gas increases by 16−23 vol % and decreases by 15−22 vol % (dry basis), respectively. Although CH4 conversion (elimination) higher than 30 vol % has never been reached, tar conversion (elimination) of 90−95 vol % are obtained with space times of 0.06−0.15 kg calcined dolomite h-1 m-3. A detailed study is here presented on how the calcined dolomite significantly cleans and upgrades the flue gas, increasing also the gas yield by 0.15−0.40 m3(STP)/kg daf biomass fed.
Darwinia citriodora (Myrtaceae), a New Source of Methyl Myrtenate and Methyl Geranate

Abstract The essential oil obtained by hydrodistillation of the leaves and twigs of Lemon-scented Myrtle, Darwinia citriodora (Endl.) Benth. cultivated in eastern Australia was investigated by GC/MS, FTIR and NMR. Two chemical forms yielding from 0.5% to 1.1% oil, respectively, on a fresh weight basis were found to be rich in either methyl myrtenate (56–76%) or an approximate 50/50 mix of methyl myrtenate and methyl geranate (49–75%). Other significant components in the oil were α-pinene (7.8%), (Z)-β-ocimene (2.0%), linalool (1.7%) bicyclogermacrene (1.3%) and viridiflorol (2.3%).
Determination of Activity Coefficients of Semi-Volatile Organic Aerosols Using the Integrated Volume Method

We demonstrate the use of the Integrated Volume Method (IVM) to estimate activity coefficients of semi-volatile organic compounds pertinent to ambient/atmospheric aerosols in binary mixtures. We generate binary solution aerosols with different mole fractions of individual components; for each mixture, we measure total change in aerosol volume upon heating from 25 ○ C to 35 ○ C, with the aerosols being at equilibrium in both states. The change in aerosol volume, or in other words, the partitioning between the particle phase and the gas phase, is used to determine activity coefficients of the compounds as a function of their mole fraction in the mixture. We demonstrate this method using the following four model systems. System 1: adipic acid–pimelic acid, which illustrates polar organic–polar organic interactions. Non-ideal behavior was observed with activity coefficients around three at infinite dilution. System 2: adipic acid–dioctyl sebacate, which illustrates polar organic–non-polar organic interactions. The compounds in this experiment did not form a solution. System 3: adipic acid–ammonium sulfate, which illustrates polar organic–inorganic interactions. The compounds in this experiment did not form a solution. System 4: adipic acid–ambient extracts, which illustrates the potential use of the method to study partitioning behavior of individual components in a complex matrix approximating that of real ambient aerosol. The measured activity coefficients of adipic acid were less than unity for the tested range of mixing ratios, indicating suppression of volatility of this compound in ambient organic matrix.