Miracle-dz/UniFAR-FTUs huggingface dataset:
A liquid compound jet

The principle and basic physics of a new type of liquid-in-air jet are described. This jet is generated by a primary fluid jet that emerges from a nozzle below the surface of a stationary (secondary) fluid. After breaking the surface, the jet consists of the central primary jet surrounded by a sheath of secondary fluid which has been entrained by the primary jet during its passage through the secondary fluid. Normally the flow in this compound jet is laminar, and it breaks up into drops due to capillary instability. In this paper the generation of compound jets is discussed, and the flow pattern in the jet is studied experimentally both in stable and unstable conditions. Three different types of instabilities can be elicited on the jet. The jet mechanism is described quantitatively, and expressions for the jet velocity and some other parameters are derived.
Design of laser zone texture for low glide media

The design of laser zone texture on NiP/Aluminum substrates to create below-25 nm-glide-height media is described in this paper. A range of laser parameters such as beam size, pulse energy, and temporal pulse width of a pulsed Nd-YVO/sub 4/ laser are explored to reveal their relationship to the resulting bump topography. Depending on where the head contact is formed, four major categories of bump shapes are found to exist. The single-crater bump shape was selected to conduct the low glide texture design. Stiction and glide performance are shown to be in agreement with theoretical predictions, which constitute our major design guidelines. It is clearly demonstrated that with proper texture design below-25 nm-glide-height media with low stiction and minimal wear are readily achievable even in the landing zone with laser texture.
Brownian Motion in the Stock Market

It is shown that common-stock prices, and the value of money can be regarded as an ensemble of decisions in statistical equilibrium, with properties quite analogous to an ensemble of particles in statistical mechanics. If Y = loge[P(t + r)/P0(t)], where P(t + r) and P0(t) are the price of the same random choice stock at random times t + r and t, then the steady state distribution function of Y is \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} $\varphi(Y)=\exp(-Y^{2}/2\sigma^{2}\tau)/\sqrt{2\pi \sigma^{2}\tau}$ \end{document}, which is precisely the probability distribution for a particle in Browman motion, if σ is the dispersion developed at the end of unit time. A similar distribution holds for the value of money, measured approximately by stoc.
SMEs filing for bankruptcy in Spain: The best of luck!

The aim of this work is to analyze the factors that help companies avoid liquidation following the spirit of the Spanish insolvency law. This work focuses on the phase starting when companies file for bankruptcy and ending with the completion of the common phase. We apply the agency theory to explain how insolvency administrators and court characteristics influence the outcome of the bankruptcy process (liquidation or reorganization). We analyze unique accounting data from 2,627 companies that filed for bankruptcy during the period 2008–2014. The findings reveal the significant roles played by the liquidation trustee, Big 4 administrators, and higher remunerations, along with the type of court in charge. Processes are more likely to result in reorganization if they are handled by specialized courts, managed by the Big 4, and if the insolvency administrator has longer experience in bankruptcy filing and receives a higher remuneration. These findings have important implications for all the agents involved. It is necessary to rationalize the filing process, foment better training for insolvency administrators, provide courts with more funds, and create more specialized courts. The principal contribution of this article is to examine the role played by insolvency administrators and the courts, and their influence on the outcome of the insolvency process. JEL CLASSIFICATION C35; D21; D22; G33; G38
Dental implant failure and bone augmentation: A retrospective study

Background To retrospectively assess the failure rate of implants placed in augmented and non-augmented sites and to investigate whether the time of implant and bone placement are associated with the risk of implant failure in a university setting. Material and Methods In this retrospective study, data were retrieved from the electronic patient database of the University of Minnesota School of Dentistry, USA to identify patients older than 18 years of age who received dental implant treatment. Patient characteristics and the adequacy of available bone were retrieved from the patients’ dental records and analyzed. Performing sinus lift and/or alveolar ridge augmentation in stages or simultaneously with implant placement and the need for multiple bone regeneration procedures were recorded. Kaplan-Meier plots and Cox regression models were created to analyze the data. Results Data from 553 implants were analyzed in the study. More than half of the implants were placed in the maxilla (56.8%) and posterior regions (74.3%). The overall survival rate was 96.9%. Sinus augmentation was performed in 19.5% of the cases, while in 12.1% of the included treatments an implant was placed simultaneously. Staged and simultaneous ridge augmentation occurred in 45.2% and 18.8% of the cases, respectively. Implants placed in an area following (p=0.018) or simultaneously (p=0.025) with sinus augmentation showed a significantly reduced survival. Cox regression analysis showed that smoking and simultaneous ridge augmentation and implant placement increased failure rates. Conclusions Within the limitations of this study, implants placed in tobacco users as well as in augmented maxillary sinuses, simultaneously or in stages, and in augmented ridges lead to higher implant failure rates. Key words:Bone grafting, dental implant, osseointegration, risk factor, survival rate, treatment outcome.
Are women more empathetic than men? Questionnaire and EEG estimations of sex/gender differences in empathic ability

Abstract The debate regarding whether women are more empathetic than men has broad scientific, social and clinical implications. However, previous independent questionnaires and brain imaging studies that tested different samples reported inconsistent results regarding sex/gender differences in empathic ability. We conducted three studies to investigate sex/gender differences in empathic ability using large-sample questionnaires and electroencephalography (EEG) measures. We showed that the estimation of empathic ability using the Interpersonal Reactivity Index questionnaire showed higher rating scores in women than in men in all studies. However, our EEG measures of empathy, indexed by both phase-locked and non–phased-locked neural responses to others’ painful (vs neutral) facial expressions, support a null hypothesis of the sex/gender difference in empathic ability. In addition, we showed evidence that priming social expectations of women and men’s ability to share and care about others’ feelings eliminated the sex/gender difference in questionnaire measures of empathic ability. Our large-sample EEG results challenge the notion of women’s superiority in empathy that is built based on subjective questionnaire measures that are sensitive to social desirability. Our findings indicate that whether the notion of women’s superiority in empathic ability reflects a biological/social difference between women and men or a gender-role stereotype remains an open question.
Enhancing growth and yield of squash (Cucurbita pepo L.) through mulching and inorganic fertilizers

An experiment was carried out to evaluate the effects of mulching and inorganic fertilizers on growth and yield of squash at the Horticultural Farm of the Bangladesh Agricultural University, Mymensingh during the period from November 2021 to February 2022. The experiment consisted of three types of mulching viz., M0 (Control), M1 (Black polythene) and M₂ (Rice straw), and five levels of inorganic fertilizers viz., T0 = Control, T1 = N : P : K: S @ 70: 70: 80: 10 kg/ha, T2 = N : P : K: S @ 80: 80: 90: 15 kg/ha, T3 = N : P : K: S @ 90: 90: 100: 20 kg/ha, T4 = N : P : K: S @ 100: 100: 110: 25 kg/ha. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The highest yield per plot (6.06 Kg) and highest yield per hectare (33.65 t) were observed from M1 (Black polythene) while the lowest yield per plot (4.11 kg) and yield per hectare (22.85 t) were found from M0 (Control). T3 treatment (N: P : K: S @ 90: 90: 100: 20 kg/ha) produced the maximum yield per plot (7.14 kg) and yield per hectare (39.65 t) while T0 (Control) treatment produced the minimum yield per plot (3.22 kg) and yield per hectare (17.86 t). The maximum yield per plot (8.36 Kg) was obtained from M1T3 (Black polythene and N: P: K: S @ 90: 90: 100: 20 kg/ha) treatment while the minimum yield per plot (2.14 Kg) was recorded from M0T0 (Control) treatment. The maximum yield per hectare (46.43 t) was obtained from M1T3 (Black polythene and N : P : K: S @ 90: 90: 100: 20 kg/ha) treatment while the minimum yield per hectare (11.89 t) was recorded from M0T0 (Control) treatment. Therefore, combined application of black polythene mulch along with N : P : K: S @ 90: 90: 100: 20 kg/ha was found to be better in respect of growth and yield of squash compared to other treatments.
The Relationship Between the Global Mean Deep‐Sea and Surface Temperature During the Early Eocene

Estimates of global mean near‐surface air temperature (global SAT) for the Cenozoic era rely largely on paleo‐proxy data of deep‐sea temperature (DST), with the assumption that changes in global SAT covary with changes in the global mean deep‐sea temperature (global DST) and global mean sea‐surface temperature (global SST). We tested the validity of this assumption by analyzing the relationship between global SST, SAT, and DST using 25 different model simulations from the Deep‐Time Model Intercomparison Project simulating the early Eocene Climatic Optimum (EECO) with varying CO2 levels. Similar to the modern situation, we find limited spatial variability in DST, indicating that local DST estimates can be regarded as a first order representative of global DST. In line with previously assumed relationships, linear regression analysis indicates that both global DST and SAT respond stronger to changes in atmospheric CO2 than global SST by a similar factor. Consequently, this model‐based analysis validates the assumption that changes in global DST can be used to estimate changes in global SAT during the early Cenozoic. Paleo‐proxy estimates of global DST, SST, and SAT during EECO show the best fit with model simulations with a 1,680 ppm atmospheric CO2 level. This matches paleo‐proxies of EECO atmospheric CO2, indicating a good fit between models and proxy‐data.
The free shear layer tone phenomenon and probe interference

Free shear layer stability measurements with a hot wire revealed that the probe itself can trigger and sustain upstream instability modes like the slit jet-wedge edge tones. The flow fields associated with the free shear layer tones induced in axisym-metric and plane air shear layers by a hot-wire probe and by a plane wedge were then explored experimentally, and found to be different in many ways from the widely investigated jet edge tone phenomenon. As many as four frequency stages have been identified, there being a fifth stage associated with the subharmonic attributed to vortex pairing in the free shear layer. No evidence of hysteresis could be found in the shear layer tone. In the interstage jump (i.e. bimodal) regions, the tone occurred in only one mode at a time while intermittently switching from one to the other. Frequency variations in each stage are shown to collapse on a single curve when non-dimensionalized with the initial momentum thickness θe or with the lip-wedge distance h, and plotted as a function of h/θe. Phase average measurements locked onto the tone fundamental show that the phase velocity and wavelength of the tone-induced velocity fluctuation are essentially independent of the stage of tone generation; in each stage, both phase velocity and wavelength decrease with increasing frequency but undergo jumps at starts of new stages. The measured amplitude and phase profiles, as well as the variations of the shear tone wavenumber and phase velocity with the Strouhal number, show reasonable agreement with the predictions of the spatial stability theory. The wavelength λ bears a unique relation to h, this h, δ relation being different from the Brown-Curle equation for the jet edge tone. Shear layer tones would be typically induced in near-field shear layer measurements involving invasive probes, and can produce misleading results. A method for determining the true free shear layer natural instability frequency is recommended.
Korovkin-type theorems and applications

Let {Tn} be a sequence of linear operators on C[0,1], satisfying that {Tn (ei)} converge in C[0,1] (not necessarily to ei) for i = 0,1,2, where ei = ti. We prove Korovkin-type theorem and give quantitative results on C2[0,1] and C[0,1] for such sequences. Furthermore, we define King’s type q-Bernstein operator and give quantitative results for the approximation properties of such operators.
Estimating Surface Divergence of Ocean Eddies Using Observed Trajectories from a Surface Drifting Buoy

Abstract A method is described that estimates the time evolution of surface divergence and other secondary circulation properties of an ocean eddy. The method is novel because it is applied to the observations of a single surface drifting buoy. Surface drifting buoys located on ocean eddies provide Lagrangian trajectories that orbit the local extremum in geopotential. At each instance, the position of the buoy lies on the boundary of a closed material surface over the eddy. Assuming, on an ocean eddy, that the material boundary points vary smoothly in time, a method is developed to estimate all points along this boundary. An ellipse is fitted to the approximated material boundary to provide a continuum of properties, including centroid, aspect ratio, orientation, and area. The time rate of change of these properties provides approximations to the eddy velocity, moment of inertia, secondary rotation, and surface divergence. Two surface drifting buoys deployed on an anticyclonic eddy in the East Australian .
Appointed‐time formation‐containment control for nonlinear multi‐agent networks using sample‐data
 feedback

This paper focuses on the single‐ and second‐order nonlinear multi‐agent systems, contributing to realizing the formation‐containment control over directed communication networks, respectively. By dividing the agents into three types, that is, the tracking‐leader, formation‐leaders and followers, a class of two‐layer sample‐data formation‐containment control protocols are developed. Then, under the proposed sample mechanism, the investigated problem is transformed into a motion planning problem and the influence caused by non‐identical nonlinear dynamics is offset by integral techniques. It shows that with the time projection method, the formation‐containment behaviour emerges at an appointed time, which is regardless of any parameters and initial conditions for agents. In comparison with previous results, the main contribution of this paper is achieving the appointed‐time formation‐containment control and appointed‐time tracking to a dynamic leader with nonlinear dynamics. Moreover, the condition on dynamics is more relaxed, only requiring the nonlinearities errors to be bounded. Finally, two simulation examples are given to indicate the effectiveness of obtained results.
Blind estimation of frequency offset in the presence of unknown multipath

We address the problem of blind estimation of carrier offset in the presence of an unknown multipath propagation channel for linearly modulated signals. The goal is to decouple the two estimation problems. Here, we capitalize on the second and higher (typically fourth-) order noncircularity of the transmitted signals. We focus on QAM and PSK-type signals. We analyze both frequency and phase estimators. We study the performance of the proposed estimators, and compare them with the corresponding Cramer-Rao bounds which are also derived. The theoretical results are verified via simulations.
Electron grain boundary scattering and the resistivity of nanometric metallic structures

Ricardo Henriquez,1 Simon Cancino,2 Andres Espinosa,1 Marcos Flores,1 Thomas Hoffmann,1 German Kremer,2 Judit G. Lisoni,1 Luis Moraga,2 Roberto Morales,2 Simon Oyarzun,1 Marco Antonio Suarez,1 Alejandro Zuniga,3 and Raul C. Munoz1,* 1Departamento de Fisica, FCFM, Universidad de Chile, Blanco Encalada 2008, Santiago 8370449, Chile 2Centro de Fisica Experimental (CEFEX), Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Santiago 7800024, Chile 3Departamento de Mecanica, FCFM, Universidad de Chile, Beauchef 850, Santiago 8370448, Chile Received 20 May 2010; revised manuscript received 29 July 2010; published 23 September 2010
On the steady motion of viscous liquid in a corner

1. In a steady two-dimensional motion of viscous liquid in the sharp corner formed by the rigid straight boundaries θ = 0, α, where r, θ are plane polar coordinates, it is found that, near enough to the corner, the most important term in the stream-function is of the form rmf(θ). The index m is evaluated in §§ 2–4 for values of α between 360 and 90°, and is found to be complex if α is less than about 146°; the limiting form of the stream-function when α is small is considered in § 5.
TOPICS IN ADVANCED ECONOMETRICS: ESTIMATION, TESTING, AND SPECIFICATION OF CROSS-SECTION AND TIME SERIES MODELS

This book, Topics in Advanced Econometrics, is written primarily as a textbook for an advanced graduate econometrics course. The topics covered include consistent model specification testing, unit roots and cointegration, and nonparametric regression estimation; they are mainly the topics in which Professor Bierens has made significant contributions to the literature over the last 15 years. This book is unusual as a textbook in the sense that it treats both cross-sectional and time series (i.e., both subscript i and t) issues in econometrics at an advanced level. Most of the results given, other than those available in standard econometrics or statistics textbooks, are drawn from the published work of the author. The book is very useful because it puts together a number of important current issues that have been treated separately in the literature and presents them systematically using a well-organized set of statistical tools. Another advantage of this book is that the materials given are almost self-contained, making this book suitable for self-tuition. This book thus ideally suits students who need tools for independent research especially in the area of nonlinear and nonparametric models and time series analysis. It will also be useful to more advanced researchers who are interested in a thorough understanding of some of the author's original and influential work in these areas.
Donanemab Population Pharmacokinetics, Amyloid Plaque Reduction, and Safety in Participants with Alzheimer's Disease

Donanemab is an amyloid‐targeting therapy that resulted in robust amyloid plaque reduction and slowed Alzheimer's disease (AD) progression compared with placebo in the phase II TRAILBLAZER‐ALZ study (NCT03367403). The objectives of the current analyses are to characterize (i) the population pharmacokinetics of donanemab, (ii) the relationship between donanemab exposure and amyloid plaque reduction (response), and (iii) the relationship between donanemab exposure and amyloid‐related imaging abnormalities with edema or effusions (ARIA‐E). Model development included data from participants with mild cognitive impairment or mild to moderate dementia due to AD from the phase Ib study on donanemab (NCT02624778) and participants with early symptomatic AD from the TRAILBLAZER‐ALZ study. The analysis showed donanemab has a terminal elimination half‐life of 11.8 days. Body weight and antidrug antibody titer impact donanemab exposure but not the pharmacodynamic response. Maintaining a donanemab serum concentration above 4.43 μg/mL (95% confidence interval: 0.956, 10.4) is associated with amyloid plaque reduction. The time to achieve amyloid plaque clearance (amyloid plaque level < 24.1 Centiloids) varied depending on the baseline amyloid level, where higher baseline levels were associated with fewer participants achieving amyloid clearance. The majority of participants achieved amyloid clearance by 52 weeks on treatment. Apolipoprotein ε4 carriers, irrespective of donanemab serum exposure, were 4 times more likely than noncarriers to have an ARIA‐E event by 24 weeks.
Removal of blur in images based on least squares solutions

We propose an image restoration method. The method generalizes image restoration algorithms that are based on the Moore–Penrose solution of certain matrix equations that define the linear motion blur. Our approach is based on the usage of least squares solutions of these matrix equations, wherein an arbitrary matrix of appropriate dimensions is included besides the Moore–Penrose inverse. In addition, the method is a useful tool for improving results obtained by other image restoration methods. Toward that direction, we investigate the case where the arbitrary matrix is replaced by the matrix obtained by the Haar basis reconstructed image. The method has been tested by reconstructing an image after the removal of blur caused by the uniform linear motion and filtering the noise that is corrupted with the image pixels. The quality of the restoration is observable by a human eye. Benefits of using the method are illustrated by the values of the improvement in signal‐to‐noise ratio and in the values of peak signal‐to‐noise ratio. Copyright © 2013 John Wiley & Sons, Ltd.
Iterative inversion of global magnetospheric ion distributions using energetic neutral atom (ENA) images recorded by the NUADU/TC2 instrument

A method has been developed for extracting mag- netospheric ion distributions from Energetic Neutral Atom (ENA) measurements made by the NUADU instrument on the TC-2 spacecraft. Based on a constrained linear inversion, this iterative technique is suitable for use in the case of an ENA image measurement, featuring a sharply peaked spa- tial distribution. The method allows for magnetospheric ion distributions to be extracted from a low-count ENA image recorded over a short integration time (5 min). The technique is demonstrated through its application to a set of representa- tive ENA images recorded in energy Channel 2 (hydrogen: 50-81 keV, oxygen: 138-185 keV) of the NUADU instru- ment during a geomagnetic storm. It is demonstrated that this inversion method provides a useful tool for extracting ion distribution information from ENA data that are charac- terized by high temporal and spatial resolution. The recov- ered ENA images obtained from inverted ion fluxes match most effectively the measurements made at maximum ENA intensity.