Miracle-dz/UniFAR-FTUs huggingface dataset:
High-Dimensional Variable Selection with Right Censored Length-biased Data

Length-biased data are inevitably encountered in various fields ranging from epidemiological cohort studies to studies of labor economics, attracting much attention in the survival literature. A crucial goal of survival analysis is to identify a subset of risk factors and their risk contributions among massive clinical covariates. However, there has been no work on variable selection for length-biased data due to the complex nature of such data and the lack of a convenient loss function. In this article, we propose an estimation method based on the penalized estimating equations to obtain both sparse and consistent estimator for length-biased data under the accelerated failure time (AFT) model. The proposed estimator possesses selection and estimation consistency property. In particular, we implement the method with SCAD penalty and local linear approximation algorithm. We suggest selecting the tuning parameter by extended BIC criterion in high-dimensional setting. Furthermore, a novel multi-stage SCAD Statistica Sinica: Newly accepted Paper (accepted author-version subject to English editing)
Downstream influence of mesoscale convective systems. Part 1: influence on forecast evolution

Mesoscale convective systems (MCSs) are difficult to forecast due to their inherent‐60 unpredictability and development from scales that are subgrid in typical global models. Here the impacts of model representation of convection on MCS structure and downstream forecast evolution are examined using two configurations of the Met Office Unified Model: the convection‐permitting (4.4‐km grid spacing) limited‐area Euro4 and convection‐parametrizing (25‐km grid spacing) Global configurations.
Land surface evapotranspiration estimation combining soil texture information and global reanalysis datasets in Google Earth Engine

ABSTRACT Global accurate evapotranspiration (ET) maps are crucial to monitor the water balance on the Earth’s surface. For this purpose, Walker et al. (2019) developed a methodology to estimate ET (ETWV), considering that the soil properties and moisture (SM) are important limiting factors. In this work ETWV was assessed in different land covers, land uses and soil properties using FLUXNET data and climate reanalysis datasets available in Google Earth Engine (GEE). GEE application programming interface (API), a powerful programming tool for non-experienced user, was used here to derived global ETWV maps. ETWV, computed with in situ FLUXNET data resulted in an overall ubRMSE of about 1.58 mm d−1. The ETWV estimates with GEE datasets yielded RMSE at least 56% smaller than those published by the available weather datasets. So, ETWV methodology showed to be suitable for deriving global ET maps from different sources of data.
Lyapunov matrices approach to the parametric optimization of a system with two delay sand a PD-controller

In the paper the parametric optimization problem for a linear system with two delays and a PD-controller is presented. In the parametric optimization problem the quadratic performance index is considered. The value of the quadratic index of quality is calculated due to the Lyapunov functional and is equal to the value of that functional for the initial function of the neutral system with two delays. The Lyapunov functional is determined by means of the Lyapunov matrix.
Strongly Magnetized White Dwarfs and Their Instability Due to Nuclear Processes

In this work, we study the properties of strongly magnetized white dwarfs (WDs), taking into account the electron capture and pycnonuclear fusion reactions instabilities. The structure of WDs is obtained by solving the Einstein–Maxwell equations with a poloidal magnetic field in a fully general relativistic treatment. The stellar fluid is assumed to be composed of a regular crystal lattice made of carbon ions immersed in a degenerate relativistic electron gas. The onset of electron capture reactions and pycnonuclear reactions are determined with and without magnetic fields. We find that magnetized WDs significantly exceed the standard Chandrasekhar mass limit, even when electron capture and pycnonuclear fusion reactions are present in the stellar interior. We obtain a maximum white dwarf mass of around 2.14 M⊙ for a central magnetic field of ∼3.85 × 1014 G, which indicates that magnetized WDs may play a crucial role for the interpretation of superluminous type Ia supernovae. Furthermore, we show that the critical density for pycnonuclear fusion reactions limits the central white dwarf density to 9.35 × 109 g cm−3. As a consequence, equatorial radii of WDs cannot be smaller than ∼1100 km. Another interesting feature concerns the relationship between the central stellar density and the strength of the magnetic field at the core of a magnetized white dwarf. For high magnetic fields, we find that the central density increases (stellar radius decrease) with magnetic field strength, which makes highly magnetized WDs more compact. The situation is reversed if the central magnetic field is less than ∼1013 G.
ELECTROOSMOTIC FLOW IN TREE-LIKE BRANCHING MICROCHANNEL NETWORK

As a kind of microchannel layout with good transport performance, tree-like branching microchannel network has been widely used for microfluidic systems, however, the optimal analysis of the tree-like branching microchannel network for electroosmotic flow (EOF) to reach a minimized fluidic resistance still needs a deep study. In this work, the EOF in tree-like branching microchannel network is theoretically and numerically studied. It is found that there is an optimal structure of the tree-like branching network for the EOF to achieve a minimum fluidic resistance under the size constraint of constant total channel volume. This work found that the optimal channel radii of the tree-like network for EOF to reach a minimum fluidic resistance satisfy the relationship of [Formula: see text], where [Formula: see text] is the radius of the parent channel, [Formula: see text] is the radius of the child channels and [Formula: see text] is the total number of child channels. This formula can be regarded as an extended Murray’s law for EOF and is helpful for the optimization design of tree-like branching microchannel network for EOF to reach maximum transport efficiency under the constant applied driven voltage.
Integrating Explicit Knowledge in the Visual Analytics Process - Knowledge-assisted Visual Analytics Methods for Time-oriented Data

In this paper, I describe my thesis project for the integration of explicit knowledge from domain experts into the visual analytics process. As base for the implementation of the research project, I will follow the nested model for visualization design and validation. Additionally, I use a problem-driven approach to study knowledge-assisted visualization systems for time-oriented data in the context of real world problems. At first, my research will focus on the ITsecurity domain where I analyze the needs of malware analysts to support them during their work. Therefore I have currently prepared a problem characterization and abstraction to understand the needs of the domain experts to gain more insight into their workflow. Based on that findings, I am currently working on the design and the implementation of a prototype. Next, I will evaluate these visual analytics methods and finally I will test the generalizability of the knowledgeassisted visual analytics methods in a second domain.
The acoustic and perceptual effects of single-microphone noise reduction in hearing aids on Mandarin fricatives and affricates

ii PREFACE . iii TABLE OF CONTENTS . iv LIST OF TABLES . viii LIST OF FIGURES . xi LIST OF ABBREVIATIONS . xiii ACKNOWLEDGEMENTS . xiv DEDICATION . xv CHAPTER 1: INTRODUCTION . 1 1.1 Single-Microphone Noise Reduction . 6 1.1.1 Modulation-based Noise Reduction (MBNR) . 6 1.1.2 Synchrony Detection . 10 1.1.3 Spectral Subtraction . 10 1.2 The Effects of SMNR on Speech Perception . 11 1.2. 1 Adult Population . 11 1.2. 1.1 No Significant SMNR Effect on Speech Intelligibility . 12 1.2. 1.2 Significant SMNR Effect on Speech Intelligibility . 17 1.2. 1.3 Testing SMNR Effect with a Dual-task Paradigm . 20 1.2. 2 Pediatric Population . 22 1.2. 3 The Effects of SMNR on Novel Word and Novel Speech Sound Perception . 25 1.3 The Importance of the Acoustic Characteristics on the Perception of Fricatives 29 1.4 Mandarin Fricatives and Affricates . 32 1.5 Possible Acoustic Effects of SMNR on Fricatives . 33
Nonlinear finite element analysis of TWEEL geometric parameter modifications on spoke dynamics during high speed rolling

ii DEDICATION . iv ACKNOWLEDGMENTS . v LIST OF TABLES . x LIST OF FIGURES . xi CHAPTER INTRODUCTION . 1 1.1 Literature Review. 3 II. FINITE ELEMENT MODEL OF THE TWEEL . 10 2.1 Two-dimensional Tweel TM plug-in . 11 2.2 Tweel TM Material properties . 14 2.3 Contact properties . 18 2.4 Multi-Point constraints. 19 2.5 Meshing the two dimensional Tweel TM . 22 III. ANALYSIS OF TWEEL WITH REFERENCE SPOKE . 25 3.1 2D Tweel TM with Steady-State Cooling . 28 3.2 2D Tweel TM with Cooling in Explicit Dynamics . 40 3.3 2D Tweel TM with No Cooling . 48 3.4 3D Reference Spoke with Steady-state Cooling . 53 3.5 3D References Spoke with Combined Steps . 67 3.6 Three Dimensional Reference Spoke with no Cooling. 75 3.7 Three Dimensional Reference Spoke with additional stretch . 82 3.8 Natural frequencies and Mode shapes . 89 3.9 Conclusions . 97 IV. ANALYSIS OF TWEEL WITH MODIFIED SPOKE GEOMETRY . 100
ABC of Content Validation and Content Validity Index Calculation

There are five sources of validity evidence that are content, response process, internal structure, relation to other variables, and consequences. Content validity is the extent of a measurement tool represents the measured construct and it is considered as an essential evidence to support the validity of a measurement tool such as a questionnaire for research. Since content validity is vital to ensure the overall validity, therefore content validation should be performed systematically based on the evidence and best practice. This paper describes a systematic approach to quantify content validity in the form of content validity index based on the evidence and best practice.
Study and control of thermoelastic damping of in-plane vibration of the functionally graded nano-plate

The phenomenon of thermoelastic damping (TED) is a well-known mechanism of structural damping in which a vibrating thermoelastic structure obeys energy dissipation caused by the irreversible heat conduction in its volume. TED can be listed as common intrinsic losses and it cannot be controlled as easily as extrinsic losses thus this subject appears to be a very attractive research field. In this study TED of in-plane vibration of a functionally graded material (FGM) nano-plate has been studied based on the Eringen nonlocal theory. The effects of main parameters such as ambient temperature, length, and width of the nano-plate, the nonlocal parameter and the material gradient on the quality factor (Q) have been investigated. Also, the effect of different combinations of ceramic and metal in an FGM plate on increasing Q and subsequently reduction of the dissipated energy due to thermal effects has been illustrated.
Comparative Study in the Structural and Modal Analysis of a Wind Turbine Planetary Gear Based on Material Reduction Criteria Using FEM

With the increasing demand for energy from the effective and smart materials, the need to minimize vibration impacts in the most engineered parts of the machine is becoming a more important factor. Structures of high technology usually have severe expectations regarding structural dynamical requirements. Removing Vibrations are fundamental to their performance. Passive damping can be used to eliminate vibrations by minimizing resonance response peaks. In this study, results of a numerical simulation on the influence of material cutting of the planet gear on vibration of a wind turbine planetary gear are presented using Finite element Method. The aim of this paper is to create through cuts on the face profile of the planet gear body with different size (four different angle values α and four different radius values R). A pilot model without removal material was modeled and submitted to simulation and serves as reference model for results comparison in terms of stress, deformation, frequency, Eigen-mode and harmonic response. The objective of this paper is to apply ANSYS software to determine and to compare the natural vibration modes and forced harmonic frequency responses for the planetary gear with different planet gear cut size in order to validate the best construction of the 16 studied cases. The obtained result has shown that for the geometry with the material cutting parameter α =75°, R=16mm, the highest occurring stress is 43467 MPa for the frequencies between 4980 Hz and 5050 Hz. This stress value indicates the maximum value of the safety factor for the selected structure. So this chosen geometry represents the optimized design that makes it possible to economize the material and to reduce approximately 8.4% of the weight of the entire planetary gear of the wind turbine and so the vibrations of the entire planetary gear of the wind turbine could be reduced.
Unified discrete mechanics II: The space and time symmetric hyperincursive discrete Klein-Gordon equation bifurcates to the 4 incursive discrete Majorana real 4-spinors equations

This paper begins with the formalization of the second order hyperincursive discrete Klein-Gordon equation. The temporal second order hyperincursive discrete Klein-Gordon equation is similar to the time-symmetric hyperincursive discrete harmonic oscillator and so bifurcates into a group of 4 incursive discrete real equations of first order. In this group, two equations are the discrete time reverse of the two other equations, giving an oscillator and an anti-oscillator. Firstly, the discrete Klein-Gordon equation, with one space dimension (1D), bifurcates to 4 first order incursive discrete equations that we called the Dubois-Ord-Mann real 4-spinors equations because Ord and Mann obtained the same equations from a stochastic method. Secondly, we generalize to three spatial dimensions (3D) these discrete Dubois-Ord-Mann equations. These 4 discrete equations are then transformed to real partial differential equations which can be written under the generic form of the Dirac quantum 4-spinors equation. Thirdly, we consider a change in the order of space variables and a change of indexes of the functions of the Dubois-Ord-Mann equations. With these changes we obtain the original real 4-Spinors Majorana partial differential equations. Also we obtain the 4 incursive discrete Majorana real equations.
Observing Mesospheric Turbulence With Specular Meteor Radars: A Novel Method for Estimating Second‐Order Statistics of Wind Velocity

There are few observational techniques for measuring the distribution of kinetic energy within the mesosphere with a wide range of spatial and temporal scales. This study describes a method for estimating the three‐dimensional mesospheric wind field correlation function from specular meteor trail echoes. Each radar echo provides a measurement of a one‐dimensional projection of the wind velocity vector at a randomly sampled point in space and time. The method relies on using pairs of such measurements to estimate the correlation function of the wind with different spatial and temporal lags. The method is demonstrated using a multistatic meteor radar data set that includes ≈105 meteor echoes observed during a 24‐hr time period. The new method is found to be in good agreement with the well‐established technique for estimating horizontal mean winds. High‐resolution correlation functions with temporal, horizontal, and vertical lags are also estimated from the data. The temporal correlation function is used to retrieve the kinetic energy spectrum, which includes the semidiurnal mode and a 3‐hr period wave. The horizontal and vertical correlation functions of the wind are then used to derive second‐order structure functions, which are found to be compatible with the Kolmogorov prediction for spectral distribution of kinetic energy in the turbulent inertial range. The presented method can be used to extend the capabilities of specular meteor radars. It is relatively flexible and has a multitude of applications beyond what has been shown in this study.
“PENGARUH CAPITAL ADEQUACY RATIO (CAR) DAN NON PERFORMING LOAN(NPL) TERHADAP PROFITABILITAS (ROA) PT BANK RAKYAT INDONESIA Tbk. (Periode 2008 – 2016)”

ABSTRAK “Penelitian ini bertujuan untuk mengetahui pengaruh Capital Adequacy Ratio dan Non Performing Loan Terhadap Profitabilitas (ROA) pada PT Bank Rakyat Indonesia Tbk. Data yang digunakan dalam penelitian ini adalah data sekunder yang bersumber dari data keuangan PT Bank Rakyat Indonesia Tbk. yang telah dipublikasikan melalui www.ir-bri.com , www.bri. co.id , serta www.idx. co.id . Variabel independen yang diuji dalam penelitian ini yaitu Capital Adequacy Ratio (CAR) dan Non Performing Loan (NPL). Sedangkan variabel dependen yang digunakan adalah Return On Asset (ROA). Dalam penelitian ini menggunakan 9 sampel data dari laporan keuangan dan laporan rasio kinerja keuangan periode 2008 – 2016. Metode penelitian ini bersifat deskriptif dengan menggunakan pendekatan kuantitatif. Metode ini mengemukakan kondisi perusahaan berdasarkan data rill yang dikumpulkan dari berbagai sumber, data yang diperoleh diolah dan dianalisis sehingga memperoleh gambaran secara sistematik dan dapat ditarik kesimpulan. ” ”Berdasarkan pengujian statistik diketahui bahwa seluruh data pengujian asumsi klasik yaitu, data terdistribusi normal, tidak terjadi multikolinearitas, tidak terjadi heteroskedastisitas, dan tidak terjadi autokorelasi. Hasil analisis regresi linier sederhana CAR diperoleh persamaan Y= 4,842 + -0,021 X negatif dan tidak berpengaruh signifikan terhadap ROA dan untuk NPL diperloeh persamaan Y= 5,443 + -1,499 X negatif dan berpengaruh signifikan terhadap ROA . ”“ Hasil analisis regresi linier berganda diperoleh persamaan 5,936 + -0,029 (X 1 ) + -1,516 (X 2 ) keduanya bernilai negatif dan berpengaruh signifikan secara simultan terhadap ROA.Hasil uji tuntuk CAR t hitung = -1,159 t tabel 2,446 t hitung 0,05 artinya tidak berpengaruh secara parsial terhadap profitabilitas (ROA). Hasil uji tuntuk NPL t hitung = -5,640 sedangkan t tabel 2,446 t hitung > t tabel dengan nilai signifikansi 0,001 F tabel dengan nilai signifikansi 0,004 < 0,05 artinya CAR dan NPL berpengaruh secara simultan (bersama-sama) terhadapprofitabilitas (ROA). ” “ Kata kunci: Capital Adequacy Ratio (CAR) dan Non Performing Loan (NPL) Terhadap Profitabilitas (ROA). ”
Research and implementation of the massive remote sensing image storage and management technology

Aiming at the requirement of satellites massive remote sensing image data storage and management,this paper discussed the key technical questions at massive remote sensing image data management.By the study,it put forward a quick indexing mechanism which is an image pyramid structure model based on a linear quad-tree technical way,and carried out the integrated management between remote sensing image data and metadata by the relational database technology.At the end of paper,it analyzed the technical ways of building a system of massive remote sensing image data management,and proved the practicality of that way through an experimental data test.
Another canonical compactification of the moduli space of abelian varieties

We construct a canonical compactification SQ g,K of the moduli space Ag,K of abelian varieties over Z[ζN , 1/N ] by adding certain reduced singular varieties along the boundary of Ag,K , where K is a symplectic finite abelian group, N is the maximal order of elements of K, and ζN is a primitive N-th root of unity, and. In [18] a canonical compactification SQg,K of Ag,K was constructed by adding possibly non-reduced GIT-stable (Kempf-stable) degenerate abelian schemes. We prove that there is a canonical bijective finite birational morphism sq : SQ g,K → SQg,K . In particular, the normalizations of SQ g,K and SQg,K are isomorphic.
Sums of A Pair of Orthogonal Frames

Frames are more stable as compared to bases under the action of a bounded linear operator. Sums of different frames under the action of a bounded linear operator are studied with the help of analysis, synthesis and frame operators. A simple construction of frames from the existing ones under the action of such an operator is presented here. It is shown that a frame can be added to its alternate dual frames, yielding a new frame. It is also shown that the sum of a pair of orthogonal frames is a frame. This provides an easy construction of a frame where the frame bounds can be computed easily. Moreover, for a pair of orthogonal frames, the necessary and sufficient condition is presented for their alternate dual frames to be orthogonal. This allows for an easy construction of a large number of new frames.
Simultaneous controllability of two vibrating strings with variable coefficients

We study the simultaneous exact controllability of two vibrating strings with variable physical coefficients and controlled from a common endpoint. We give sufficient conditions on the physical coefficients for which the eigenfrequencies of both systems do not coincide and the associated spectral gap is uniformly positive. Under these conditions, we show that these systems are simultaneously exactly controllable.
Corrective feedback and learner uptake in a Chinese as a foreign language class: do perceptions and the reality match?

Supervisory Committee Dr. Hossein Nassaji (Department of Linguistics) Supervisor Dr. Hua Lin (Department of Linguistics) Departmental Member The goal of this study is to examine teacher feedback, learner uptake, and feedback perceptions in an adult Chinese as a Foreign Language (CFL) context. A 200level Chinese reading course was observed for data collection. Participants included 13 students and one teacher. Thirteen class sessions (10 hours) were video-taped. A short survey, given at the end of each of the last six class sessions, was designed to elicit the teacher’s and the students’ perceptions of feedback frequency. The participants were not informed of the focus of this research at the beginning of data collection. Video-recorded data was fully transcribed and coded using Panova and Lyster’s (2002) feedback categorization. The teacher’s response to the survey was compared to that of the students’ regarding perceptions of feedback frequency. The results showed that the teacher provided feedback to 68.1% of all students’ errors. On average there was one feedback move every 2.4 minutes. All feedback types in Panova and Lyster’s model were present, and there were a few new moves, namely “asking a direct question,” “directing question to other students,” and “using L1-English. ” A total of 245 teacher feedback moves occurred during the observation. Recasts accounted for 56.7% of all feedback moves, followed by metalinguistic feedback which accounted for 10.6%. Elicitation moves achieved the highest uptake rate (94.1%). Next, explicit correction and metalinguistic feedback had 88.9% and 53.8% uptake rate iv respectively. Concerning perceptions of feedback, the teacher was more accurate in perceiving four types of feedback while the students were accurate about three. It was concluded that recast was the predominant type of feedback in this study. Other explicit types of feedback were more successful in leading to learner uptake. The teacher and the students were generally not accurate in perceiving the frequency of each feedback type, due to the challenge of remembering the feedback move after the lesson had finished. The pedagogical implication is that teachers should consider a wide range of feedback techniques, especially more explicit types, to better engage students in a reading class.