Miracle-dz/UniFAR-FTUs huggingface dataset:
Graphene Oxide Films Prepared Using Gelatin Nanofibers as Wearable Sensors for Monitoring Cardiovascular Health

A gelatin nanofiber film that shows a failure tensile stress of 35 MPa, much stronger than conventional polyacrylamide hydrogels (<0.2 MPa), tough double network hydrogels (0.2–1.0 MPa), some engineering plastics such as polyethylene films (16 MPa) and polysulfones (1–10 MPa), is prepared by electrospinning. It is processed into a graphene oxide film, which exhibits high conductivity, via a high‐temperature treatment. A simple approach to prepare graphene oxide films using gelatin is provided. A highly sensitive and responsive wearable sensor is fabricated using the graphene oxide film, which is capable of sound recognition, apexcardiogram recording, and pulse spectrum measurement. The apexcardiogram is strongly associated with hemodynamic cardiac health, which reflects the cardiac process of ventricular contraction, blood ejection, diastole, semilunar valve open/close, atrioventricular valve valve open/close, etc. The developed cardiac sensor could be used to measure arterial stiffness index, a derivative of pulse spectrum, useful to evaluate artery walls stiffness and health status. Using the developed sensor, the detection result can be wirelessly relayed to mobile devices for personal cardiac health monitoring.
Depletion-Induced Chiral Chain Formation of Magnetic Spheres

Experimental evidence is presented for the spontaneous formation of chiral configurations in bulk dispersions of magnetized colloids that interact by a combination of anisotropic dipolar interactions and isotropic depletion attractions. The colloids are superparamagnetic silica spheres, magnetized and aligned by a carefully tuned uniform external magnetic field; isotropic attractions are induced by using poly(ethylene oxide) polymers as depleting agents. At specific polymer concentrations, sphere chains wind around each other to form helical structures–of the type that previously have only been observed in simulations on small sets of unconfined dipolar spheres with additional isotropic interactions.
Simulation of LCROSS hydroxyl band strength data

Simulation of LCROSS Hydroxyl Band Strength Data Sergio Andre Tovar, M.S.E. The University of Texas at Austin, 2019 Supervisor: David B. Goldstein Co-Supervisor: Philip L. Varghese In 2009, NASA launched the Lunar CRater Observation and Sensing Satellite (LCROSS) mission to confirm and characterize the presence of water ice in the Moon. This work aims to characterize the Moon’s regolith by analysing LCROSS data not studied in detail before, the hydroxyl (OH) band strength observations. A simulated OH band strength was obtained by an improved numerical model based on previous work by Heldmann et al. (2015). Using a fitting method, we fitted three hypothesized OH-producing processes to the OH band strength data. Multiple solutions arose from the fitting method, and the models were only moderately constrained. The results indicate that a prompt release of OH is necessary to explain early data, and that most of the OH band signal after ∼ 15 seconds was produced by the photodissociation of water from ice-containing grains in the LCROSS impact-plume.
Composite structure formation on the surfaces of geometrically complex products

The paper examines the main issues of ensuring necessary indicators of product durability, shows the viability of additional technological impact on the surface layer of products during their manufacture, and presents a method for improving the surface layer properties due to the composite structure formation through its exposure to low-temperature plasma of the combined discharge. The paper provides the results of comparative tests of products with a formed composite structure and similar conventional products.
History and development of traditional Chinese medicine

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The effect of niobium and titanium in base metal and filler metal on intergranular corrosion of stainless steels

The article describes the effect of alloyed additives in base material and filler metal on intergranular corrosion. Steel 1.2 mm thick, titanium-stabilized ferritic stainless steel and titanium and niobium-stabilized ferritic stainless steel have been surfacing method MAG (135). The specimens received was subjected to macro and microscopic tests, hardness tests and the intergranular corrosion resistance test. The study showed a higher corrosion resistance of niobium and titanium stabilized steel from titanium-stabilized steel. In addition, a ferritic fine-grain structure was found in the padding axis made with the use of filler metal with titanium and niobium microadditives.
Local flap reconstruction of large scalp defects.

Scalp defects can have a number of origins, and their repair is dependent upon their location, size and depth. In the case of the scalp, the repair of even small defects is complicated. Local flaps are the reference for the reconstruction of such defects. Knowledge of scalp anatomy is essential for preparing these flaps, which must be based on one or two vascular pedicles to afford a large rotation angle – thereby facilitating closure of the defect. The parietal zone is the location offering the greatest flap mobilization possibilities. We present a case involving the repair of a major pericranial frontoparietal scalp defect. A local transverse posterior transpositioning scalp flap was raised with the posterior auricular and occipital arteries as vascular pedicle. Following repositioning of the flap, a free partial-thickness skin graft from the thigh was used to cover the donor zone. A review is provided of the different techniques for the reconstruction of large scalp defects.
Viscous drag force model for dynamic Wilhelmy plate experiments

In this work we revisit the dynamic Wilhelmy plate method for measuring dynamic contact angles with a specific focus on the viscous drag force which acts along the submerged surface of the plate. Particle image velocimetry shows that the viscous drag force can induce significant contact angle measurement errors if ignored. Preexisting models are found to underestimate the viscous drag force at moderate to high Capillary numbers, in finite-sized fluid domains, and for curved interfaces. Therefore, we propose a new model for the shear stress along a Wilhelmy plate by combining the dominant terms from a moving contact line flow, a Stokes flow past the leading edge of a flat plate, and a Couette-Poiseuille flow. This new model accounts for the shape of the fluid interface, the finite length of the plate, and the finite-size of the fluid container. Good agreement is obtained in comparisons with particle image velocimetry measurements over a Capillary number range from 0.001 to 0.3. This viscous drag model is applied to a dynamic Wilhelmy plate experiment and we obtain dynamic microscopic contact angle measurements and unbalanced Young’s forces that are consistent with hydrodynamic theories of the moving contact line.
Curcumin as a therapeutic agent against cancer

Background: Curcumin is an important chemopreventive agent against cancer. Recently, it has been reported that curcumin has also anti-angiogenic effects in tumor. Objective: This article reviews the effect of curcumin against tumor angiogenesis from view-points of cancer microcirculation and biomarkers. Results and conclusion. We demonstrated an anti-angiogenic effect of curcumin in tumors using nude mice. We studied the inhibitory effects of curcumin on tumor-induced neocapillaries and proangiogenic factors, based on our intravital fluorescent observation. Finally, we hypothesized a possible mechanism for curcumin effect in tumor.
Self-polarization in Storage Rings

The possibility of electrons becoming polarized in an uniform field was predicted in the early 60s by Loskutov, Korovina, Sokolov and Ternov (Sokolov-Ternov effect of radiative polarization). The very first experimental observation of beam self-polarization followed in 1968 at ACO in Orsay and therefore this year marks the fiftieth anniversary of that event. In particular at high energy, e± polarization is not really for free and in addition experiments are mainly interested in longitudinal polarization. This is obtained through spin rotators which may lead to depolarization. The p/e± high energy collider HERA in Hamburg was the first, and until now the only one, designed for delivering longitudinal e± polarization to the experiments.
Viscoelastic film flows over an inclined substrate with sinusoidal topography. II. Linear stability analysis

The linear hydrodynamic stability of a film of viscoelastic fluid flowing down an inclined wavy surface is studied. We investigate the stability of the flow with respect to infinitesimal twoand three-dimensional (2D and 3D) disturbances and employ the Floquet-Bloch theory to examine the effect of periodic disturbances of any wavelength. The study is based on the numerical solution of the momentum equations along with the Phan-Thien–Tanner (PTT) model to account for material viscoelasticity. The generalized eigenvalue problem is solved using Arnoldi’s algorithm, in a Newton-like implementation in order to calculate faster the critical conditions for the onset of the instability. Our results are in excellent agreement with the previous experimental and theoretical results in the case of Newtonian liquids flowing over flat and undulating substrates and viscoelastic liquids over flat substrates. We present detailed stability maps for finite amplitude of the wall corrugations and a wide range of material parameters. Our calculations indicate that fluid elasticity is primarily stabilizing, while shear thinning of the fluid tends to destabilize the fluid flow. In order to investigate the mechanisms involved, we perform an energy analysis of the flow under long-wave disturbances indicating that the convection of stress-gradient disturbances provides an additional viscoelastic mechanism for the destabilization of the flow, in contrast to the base state stress gradients which contribute to stabilization of the flow. Besides the usual long-wave instability, conditions are identified which lead to unstable disturbances of wavelength equal or smaller than the wavelength of the substrate. Experimental observations for Newtonian liquids have indicated that these short-wave instabilities will dominate and a similar behavior is predicted for viscoelastic liquids. Sometimes, before the short-wave instabilities, a hysteresis loop in the steady flow can be identified, which leads to a sharp change in the critical frequency. Finally, we examine the stability of the flow when subjected to disturbances in the spanwise direction and show that for highly elastic liquids 3D instabilities may arise.
What Can Infrared Spectra Tell Us about the Crystallinity of Nanosized Interstellar Silicate Dust Grains?

Infrared (IR) spectroscopy is the main technique used to identify and characterize silicate dust grains in astronomical environments. From IR spectra, the fraction of crystalline dust particles can be estimated and used to help understand the processing of dust occurring in different astronomical environments such as the interstellar medium (ISM) and circumstellar shells. Narrow spectral lines are assigned to crystalline grains, while broad signals are usually assumed to originate from amorphous material. Herein, we accurately calculate the IR spectra and energetic stabilities of several amorphous and crystalline silicate nanograins with an astronomically common Mg-rich olivinic (Mg2SiO4) stoichiometry and with sizes ranging from hundreds to thousands of atoms. First, unlike at larger length scales, crystalline forsterite-like grains at the nanoscale are found to be energetically metastable with respect to amorphous grains. However, from our careful analysis, we further show that the IR spectra of such na.
Effect of Extrusion Parameters on Textural Properties of Parboiled Rice based Bittergourd and Water Chestnut Blended Extrudates

Food extrusion is a very efficient technology successfully adopted by snack food processing industries. Various types of food products different in shapes and sizes are manufactured by this versatile, handy and low cost cooking technology such as snacks, breakfast cereals, baby foods, texturized vegetable protein (TVP), pet foods, dried soups, snack foods, etc. (Toft,1979 and Verma, 2010). Better product quality and no process effluents are the major advantages of this technology (Harper and Clark, 1979; Camire et al., 1990).
HPV in the etiology of human cancer

The causal role of human papillbmavirus (HPV) in all cancers of the uterine cervix has been firmly established biologically and epidemiologically. Most cancers of the vagina and anus are likewise caused by HPV, as are a fraction of cancers of the vulva, penis, and oropharynx. HPV-16 and -18 account for about 70% of cancers of the cervix, vagina, and anus and for about 30-40% of cancers of the vulva, penis, and oropharynx. Other cancers causally linked to HPV are non-melanoma skin cancer and cancer of the conjunctiva. Although HPV is a necessary cause of cervical cancer, it is not a sufficient cause. Thus, other cofactors are necessary for progression from cervical HPV infection to cancer. Long-term use of hormonal contraceptives, high parity, tobacco smoking, and co-infection with HIV have been identified as established cofactors; co-infection with Chlamydia trachomatis (CT) and herpes simplex virus type-2 (HSV-2), immunosuppression, and certain dietary deficiencies are other probable cofactors. Genetic and immunological host factors and viral factors other than type, such as variants of type, viral load and viral integration, are likely to be important but have not been clearly identified.
Stress of Nurses, Attitude for Development to be a Magnet Hospital and Factors Associated with Stress of Registered Nurses in Private International Hospital

Objective: To study the level of stress and associated factors about demographic, work and attitude for development to be a magnet hospital among registered nurses in private international hospital. Methods: A cross-sectional descriptive study was conducted. Three hundred full-time registered nurses in one private international hospital in Bangkok were recruited. The research instruments were 3 parts: 1) demographic data and factors associated with job and feelings toward job questionnaire 2) preparation to be magnet hospital factors 13 parts and 3) Suanprung Stress Test questionnaire. Data were analyzed by percentage, mean and standard deviation, Chi-square test. Results: All of sample were women. The average age were 29.4 years. About 64.3% of the nurses had high level of stress. The factors associated with nurses stress were perceiving about the respect from patients, colleagues and supervisors, preparation to be magnet hospital factors 6 parts; part of professional working, professional improvement, organizational culture, staff selection and evaluation, nurse working support and payment management. Conclusion: Most of the sample had high level of stress and factors associated with stress were perceiving about the respect and attitude for development to be magnet hospital. Concern and help for decreasing stress as well as understanding about preparation to be magnet hospital may help organizational development to be a magnet hospital.
3D CAUCHY PROBLEM FOR AN ELASTIC LAYER: INTERFACIAL CRACKS DETECTION

This study presents a Cauchy-type problem of 3D elasticity for an elastic layer that can be bonded to an infinite base (half-space) made of dissimilar elastic material. The initial conditions are given on one side of the layer and both stress and displacement vectors are assumed to be known simultaneously. No conditions are specified on the other side. In the case of this side being fully bonded to the base, the stress and displacement vectors are continuous across the interface. This fact introduces certain relationships that have to be imposed on the initial conditions in order to obey continuity. We use these in order to detect a possible appearance of delamination of the interface. By using the double Fourier transform and the general solution of 3D elasticity in terms of harmonic functions, the initial value problem is reduced to a system of Fredholm integral equations of the first kind. Solutions of such systems are usually unstable; therefore, a numerical approach is suggested to overcome this difficulty by using the SVD regularisation. A possibility of delamination detection is discussed.
Unleashing the potential of Ti2CTx MXene as a pulse modulator for mid-infrared fiber lasers

The strong light–matter interaction in two dimensional (2D) materials portends an untapped potential for fiber lasers in the long sought-after terahertz to mid-infrared spectral range. Here, the broadband nonlinear optical properties of zero-gap 2D Ti2CTx MXene—a class of 2D transition metal carbides that exhibit high laser damage threshold—is discussed. Using the open aperture Z-scan method, for the first time the broadband saturable absorption properties of Ti2CTx in the 800–1560 nm spectral range are demonstrated. Specifically, it is shown that the high absorption and low saturation intensity of Ti2CTx make it an ideal saturable absorber for mode-locked fiber lasers operating at 1565 and 1051 nm, which exhibited pulse widths of 5.3 ps and 164 ps, respectively. Additionally, a Ti2CTx saturable absorber was used as a Q-switcher to realize a pulsed fiber laser operating at 2.8 µm, which showed excellent nonlinear absorption performance in the mid-infrared regime. This study significantly broadens the scope of materials available for non-linear optical applications in the near and mid-infrared regimes.
Learning to Reduce Annotation Load

Modern machine learning methods and their applications in computer vision are known to crave for large amounts of training data to reach their full potential. Because training data is mostly obtained through humans who manually label samples, it induces a significant cost. Therefore, the problem of reducing the annotation load is of great importance for the success of machine learning methods. We study the problem of reducing the annotation load from two viewpoints, by answering the questions “What to annotate? ” and “How to annotate? The question “What? ” addresses the selection of a small portion of the data that would be sufficient to train an accurate model. The question “How? focuses on minimising the effort of labelling each datapoint. The question “What to annotate? ” becomes particularly compelling if we can select data to be annotated in an iterative and adaptive way, a setting known as active learning (AL). The key challenge in AL is to identify the datapoints that are the most informative for the model at a given stage. We propose several techniques to address this challenge. Firstly, we consider the problem of segmenting natural images and image volumes. We take advantage of image priors, such as smoothness of objects of interest, and use them in a novel form of geometric uncertainty. Using this, we design an AL technique to efficiently annotate data that is tailored to segmentation applications. Next, we notice that no single manually-designed strategy outperforms others in every application and that often the burden of designing new strategies outweighs the benefits of AL. To overcome this problem we suggest learning an AL strategy from data by formulating the AL problem as a regression task that predicts the reduction in the generalisation error achieved by labelling each datapoint. This enables us to learn AL strategies from simulated data and to transfer them to new datasets. Finally, we turn towards non-myopic data-driven AL strategies. To this end, we formulate the AL problem as a Markov decision process and find the best selection policy using reinforcement learning. We design the decision process such that the policy can be learnt for any ML model and transferred to diverse application domains.
Effects of thermal treatment on the mechanical properties of larch (Larix gmelinii) and red oak (Quercus rubra) wood cell walls via nanoindentation

Thermally treated wood is widely used for construction, furniture, and flooring because it has better dimensional stability in outdoor conditions. There is a close relationship between the mechanical properties of thermally treated wood cell walls and the performance of its products. The hardness (H) and reduced elastic modulus (Er) of larch (Larix gmelinii) and red oak (Quercus rubra) wood cell walls were investigated via nanoindentation. The results showed that the larch and red oak wood specimens had different nanomechanical properties. The Er in the larch wood initially increased with a maximum value of 22.4 GPa at 225 °C, then rapidly decreased after 300 °C with a minimum value of 5.7 GPa at 350 °C. The Er in the red oak wood appeared to have a mild decline. The H in both wood species visibly increased with the thermal treatments due to the reduction of organic wood polymers and the increase of inorganic carbon materials.
Numerical simulation of undrained cyclic behavior for desaturated silica sands

Desaturation is an effective ground improvement for mitigating liquefaction-induced ground failures. This paper aims to discuss numerical capabilities for simulating the undrained cyclic behavior of desaturated silica sands. The laboratory experiments were initially conducted to investigate desaturation effects on medium dense desaturated silica sand behavior (Dr=60-65%, Sr=91-100%) under undrained triaxial loading conditions. Desaturation was achieved by injecting micro-bubbled water. The experimental results showed an increase of the angle of a phase transformation line, φpl, in 4-5 ̊, no desaturation effects on the angle of a critical state line, φcl, and less degradation of Young modulus comparing to the saturated condition. The numerical analysis was secondarily performed to simulate the experimental results using LIQCA2D17. The comparisons to the preliminary experimental result showed that failure criteria were critical on stress-strain behaviors, and the Yasufuku criterion was suitable for both saturated and desaturated conditions. The desaturation effects were further discussed. The desaturation critically affected the stress-strain behavior after the stress path reached the phase transformation. The desaturated silica sands exhibited continuous modulus reduction although the specimens were fully liquefied (i.e., EPWP ratio nearly equaled to 1.0). Liquefaction of those desaturated silica sands was characterized as “slowly flow deformation. ”
Synthesis of nickel nanoparticles by sol-gel method and their characterization

The under consideration study focuses on synthesis and characterization of Nickel oxide (NiO) nanoparticles. Nanosized Nickel oxide powder was successfully synthesized using a simple and low cast sol-gel method. This method is environment friendly requiring no expensive chemicals and is time saving. The sol-gel method was accompanied by the formation of precipitates which were dried and calcined at 550oC to get nickel oxide nanoparticles. The synthesized nanopowder was characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDX).