Miracle-dz/UniFAR-FTUs huggingface dataset:
Physics-based multiscale modeling of III-nitride light emitters

The application of computer simulations to scientific and engineering problems has evolved to an established phase over the last decades. In the field of semiconductor device physics, Technology CAD (TCAD) has been regarded as an indispensable tool for the interpretation and prediction of device behavior. More specifically, TCAD modeling and simulation of nanostructured III-nitride light emitters still have challenging problems and is currently a topic under active research. This thesis devotes to the theoretical and numerical investigations of III-nitride bulk and quantum structures, following a bottom-up approach aimed at modeling and understanding photoluminescence and electroluminescence in these structures. In the first part, the calculation of electronic bandstructure is addressed, where a novel k · p model derived from Non-local Empirical Pseudopotential method(NL-EPM) is presented. Optical properties are then calculated employing both Poisson-k · p and a density-matrix based approach, gain and luminescence spectra can be extracted by solving the semiconductor-Bloch equation numerically. The last part of this thesis deals with the microscopic quantum transport, within the framework of the quantum-statistical nonequilibrium Greens function formalism(NEGF). While classical drift-diffusion models assume that bound carriers hold their coherence in the confined direction and unbound carriers are completely incoherent, NEGF does not distinguish between bound and unbound states and treats them on equal footing. In addition, NEGF also provides intuitive insights into energy-resolved carrier distributions, currents and coherence loss mechanisms. The numerical computations alongside this thesis can be computationally very involved, some code developed along with this thesis is deployed on the clusters and able to scale up to more than 1000 CPU cores, thanks to the parallel implementation technique such as OpenMP and MPI, as well as HPC infrastructures available at CINECA computing center
Effects Of Geometry On The Resonance Frequency Of Helmholtz Resonators

Abstract An equation for the resonance frequency of a Helmholtz resonator was developed from the wave equation for the case of a cavity volume that was a rectangular parallelepiped and an orifice the flow from which had a constant velocity profile. The development resulted in an explicit form for the interior end correction that included the influence of cavity and orifice geometry. Mean flow across the orifice was not examined. Results for circular, rectangular and cross-shaped orifices were obtained. The results were compared with those from the Rayleigh equation and with those from the transcendental resonance equation, under extremes of orifice and cavity geometry, and orifice position. Both classical equations were found to have constraints on their region of validity when extremes of geometry were encountered. Validity was greatest for a nearly cubical cavity.
A Detection Algorithm to Anomaly Network Traffic Based on Spectral Kurtosis Analysis

This paper presents a detection algorithm for anomaly network traffic, which is based on spectral kurtosis analysis. Firstly, we turn network traffic into time-frequency signals at different scales. These time-frequency signals hold the more detailed nature corresponding to different scales. Secondly, the time-frequency signals at different scales are transformed into a series of new time signals by time-frequency analysis theory. These new time signals hold obvious narrowband nature and embody the local properties of network traffic. Thirdly, we calculate the spectral kurtosis values of the new time signals and then perform the feature extractions. As a result, the abnormal network traffic can be correctly identified. Simulation results show that our algorithm is feasible and promising.
GRAPH THEORY AND TOPOLOGY FOR 3 PHASE POWER SYSTEM UNDER FAULTED STUDIES

This manuscript will provide a step by step method on how a graph theory and topology can be utilized to construct a Z-loop matrix for the study of faulted 3 phase power systems. The growing demand for reliable electrical power supply has forced the pace developments in electrical power system analysis using computer. In this, power system analysis plays a significant role for the analysis of faulted power system, eventually for power system protection and control. By applying theoretical rules in graph theory, an algorithm to construct Z-loop without generating loop incidence matrix for network analysis/circuit analysis was studied. It has more than just minor special cases with those used in network analysis and circuit computer design. This paper describes a new algorithm to construct a loop impedance matrix without generating loop incidence matrix by means of a certain topological relationship, linear graph, or simply graph theory. A linear graph is a graph in which edges/branches are connected only at the points, which are identified as nodes of the graph. Finally numerical sample project was presented by the use of the loop impedance matrix to solve network analysis studies.
Angular beaming and giant subpulses in the Crab pulsar

We propose that the extremely high brightness of the giant ultra-short subpulses observed in the Crab pulsar is consistent with the angular beaming due to relativistic motion of radiating sources along dipolar magnetic field lines. We argue that the effect of kinematic boosting inherently associated with localized relativistic sources results in apparent shortening and, in consequence, brightening of the emitted impulses. Thus we suggest that the giant subpulses are intrinsically many orders of magnitude less bright and powerful than they appear when interpreted within a temporal modulation model.
Air Pollution in South Texas: A Short Communication of Health Risks and Implications

Air pollution is a major public health concern. The region of South Texas in the United States has experienced high levels of air pollution in recent years due to an increase in population, cross-border trade between the U.S.A. and Mexico, and high vehicular activity. This review assesses the relationships between human health and air pollution in South Texas. A thorough scientific search was performed using PubMed, Science Direct, and ProQuest, with most of the literature focusing on the source apportionment of particulate matter that is 2.5 microns or less in width (PM2.5), Carbon Dioxide (CO2), carbon monoxide (CO), Black Carbon (BC), and associated health risks for children and pregnant women. Findings from the source apportionment studies suggest the role of industries, automobiles emissions, agricultural burning, construction work, and unpaved roads in the overall deterioration of air quality and deleterious health effects, such as respiratory and cardiovascular diseases. This review demonstrates the pressing need for more air pollution and health effects studies in this region, especially the Brownsville–Harlingen–McAllen metropolitan area.
Sufficient conditions for interval properness of linear error detecting codes

Abstract Properness of a linear error detecting code is a property which in a cer-tain sense makes the code more appropriate for error detection over asymmetric memoryless channel than a non-proper one. This property isrelated to the undetected error probability of the code, which is a func-tion of the channel symbol error probability, involving the code weightdistribution. However, relatively few codes are known with their weightdistribution. It is therefore useful to have criteria for properness whichdo not depend on the code weight distribution. Here we give suﬃcientconditions for interval properness of a q-ary linear error detecting code,which only involve the code length and the dual code distance. In case ofbinary codes our criterion reduces to a criterion known earlier. We alsogive examples, mostly on parametric classes of Griesmer codes, whereintervals of properness have been found by help of the new criterion. Itturns out that when the dimension of the Griesmer codes under consid-eration increases the intervals of properness converge to (0, (q − 1)/q],i.e., the codes are asymptotically proper.
Special polynomials associated with rational solutions of the defocusing nonlinear Schrödinger equation and the fourth Painlevé equation

Rational solutions and rational-oscillatory solutions of the defocusing nonlinear Schrödinger equation are expressed in terms of special polynomials associated with rational solutions of the fourth Painlevé equation. The roots of these special polynomials have a regular, symmetric structure in the complex plane. The rational solutions verify results of Nakamura and Hirota [J. Phys. Soc. Japan, 54 (1985) 491–499] whilst the rational-oscillatory solutions appear to be new solutions of the defocusing nonlinear Schrödinger equation.
Pancreatic Ductal Adenocarcinoma and Immune Checkpoint Inhibitors: The Gray Curtain of Immunotherapy and Spikes of Lights

Pancreatic ductal adenocarcinoma (PDAC) is a dismal disease with a poor 5-year overall survival rate (~10%). The revolution of immunotherapy in clinical oncology has not substantially changed clinical outcome for patients with PDAC. Despite outstanding efforts, neither immune checkpoint inhibitors (ICIs) alone, nor in combination with chemotherapy or targeted therapies have shown encouraging results. This failure mirrors the lack of knowledge about the real key players of immune system senescence and the complexity of the tumor microenvironment in PDAC. However, some hope can be derived from PARP-inhibitor combinations, vaccines, and CAR-T-cells therapy. In this review, we comprehensively summarize the latest updates about the use of ICIs in PDAC, focusing on clinical evidence and ongoing studies highlighting explanations for the failure of immunotherapy and possible solutions.
Cyr61 Mediates Angiotensin II-Induced Podocyte Apoptosis via the Upregulation of TXNIP

Purpose It is well documented that angiotensin II (Ang II) elevation promotes apoptosis of podocytes in vivo and vitro, but the potential mechanism is still oscular. The current study is aimed at probing into the assignment of cysteine-rich protein 61 (Cyr61) in Ang II-induced podocyte apoptosis. Methods Podocytes were treated with Ang II (10−6 mol/L) for 48 hours to establish an injury model in vitro. Western blot assays were detected the expression of Cyr61, Cyt-c, Bax, and Bcl-2. Gene microarray was used to analyze the expression of mRNAs after treatment with Ang II. CRISPR/Cas9 technology was used to knock down Cyr61 and overexpress TXNIP gene, respectively. Results The expression of Cyr61, TXNIP, Cyt-c, and Bax in podocytes treated with Ang II were upregulated, but the expression and apoptotic rates of Bcl-2 in podocytes were inhibited. The level of the above factors was not significantly different after the knockdown of Cyr61 with Ang II in podocytes. In Ang II group, when knocked down Cyr61, the expressed level of TXNIP, Cyt-c, and Bax was diminished after Ang II treatment; interestingly Bcl-2 expression and podocyte apoptotic rate were reduced. Under the stimulation of Ang II, the expression of Cyt-c and Bax were growing, whereas Bcl-2 was reduced, and the apoptotic rates were higher in the TXNIP overexpression group. Cyt-c and Bax were put on, whereas that of Bcl-2 was to be cut down when the Cyr61 was knockdown, and the apoptotic rates were gained in the TXNIP overexpression+Cyr61 knockdown group. Conclusions The results of the study extrapolate that Cyr61 plays a dominant role in Ang II-induced podocyte apoptosis. Additionally, Cyr61 may mediate the Ang II-induced podocyte apoptosis by promoting the expression of TNXIP.
Robust Scheduling With Temporal Decomposition of Integrated Electrical-Heating System Based on Dynamic Programming Formulation

To realize the potential of the integrated electrical-heating systems (IEHS) for coping with the uncertain renewable energy, a reserve scheduling model based on the dynamic programming transformed multi-stage adaptive robust optimization (DMRO) is proposed in this article. The DMRO model enforces the non-anticipativity of scheduling process via temporal decomposed framework, and enhances the formulation flexibility for time-coupled equipment, such as energy storage systems (ESS). The whole scheduling model is split into two problems under the decomposition constructure, which consists of a reserve interval generation (RG) problem for making the unit commitment and systems’ reserve plan, and a multi-stage economic operation (EO) problem aiming with simulating the worst-case scheduling process. To obtain the global optimal, a nested Benders decomposition algorithm is employed to solve the DMRO model. Case studies on the 6-Bus-5-node IEHS and the 118-Bus-24-node IEHS demonstrate the effectiveness of the proposed model and the solution methodology.
Theoretical Implications of the Higgs Discovery

El reciente descubrimiento de la particula Higgs en el Large Hadron Collider (LHC) es un hito en la fisica de particulas. Dicho descubrimiento abre la posibilidad de explorar el Standard Model (SM) y posible nueva fisica mas alla del SM (BSM, i.e. beyond the SM ) a traves de las interacciones del Higgs con las demas particulas del SM. Es decir, el interes real no consiste en el mero hecho de explorar los aspectos puramente fenomenol'gicos del Higgs y del SM sino en entender cual es la fisica y principios detras de la rotura de la fuerza electrodebil. La fisica del Higgs tiene lugar a la escala de energia mas alta explorada hasta la fecha y es por lo tanto muy importante que la investiguemos a fondo. En la primera parte de la tesis discuto las implicaciones que tiene el valor de la masa del Higgs para la estabilidad del vacio electrodebil. En primer lugar, presento el analisis de orden N 2LLog del potencial del Higgs del SM. Este analisis permite reducir a 1 GeV la incertidumbre en el valor critico de la masa Higgs Mh para la estabilidad del vacio electrodebil. Aunque el parametro del acoplo cuartico del Higgs evaluado en la escala de energia de Planck es muy proximo a zero, el N 2LLog analisis muestra que la estabilidad absoluta del vacio electrodebil es incompatible con los valores centrales de las medidas experimentales de las masas del Higgs y top quark. Tambien muestro que un escalar pesado puede inducir una correccion relativamente grande al acoplo cuartico de Higgs y por lo tanto estabilizar el vaco electrodebill. Varios ejemplos relevantes de fisica BSM donde el mecanismo puede estar operativo son discutidos. En la segunda parte de la tesis discutimos como operadores de dimension superior, que parametrizan fisica BSM pesada, afecta las interacciones del Higgs. Bajo ciertas asump-ciones, 8 CP-par y 3 CP-impart Wilson coeﬃcients parametrizan el impacto principal en la fisica del Higgs, ya que todos los demas Wilson coeﬃcients estan constre˜nidos por experimentos previos al LHC. Calculamos las dimensiones anomalas mas relevantes para la fisica del Higgs. Esta dimensiones anomalas describen como se mezclan los operadores de dimension superior bajo correcciones cuanticas perturbativas. Esto permite encontrar las correcciones logaritmicas principales a las predicciones de las interacciones del Higgs en varios modelos especiﬁcos como el MSSM o el modelo del Higgs compuesto. Tales correcciones pueden ser relevantes en varios casos. Finalmente, en la ultima parte estudiamos el patron sorprendente que tienen las dimen¬siones anomalas de los operadores de dimension seis. El patron consiste en que la matriz de dimensiones anomalas presenta muchas entradas nulas, lo cual no es evidente ya que aparentemente dichas entradas no esta prohibidas por ninguna simetria. Un argumento, basado en el uso de supersimetria como simetria espurea, es presentado.
The Maple Computer Algebra System: A Review

We set out the main features of Maple V, Release 3, and discuss its potential value to econometricians. Computer algebra systems, of which Maple is a leading example, have developed with the increased power of modern computers, but require skill and patience to use. It seems likely they will find a place in the econometrician's toolkit for work at the interface between analytic and numerical work, where they should prove valuable. However, although Maple has many of the features of conventional statistical/econometric/numerical software, it should not be seen as a substitute. Copyright 1995 by John Wiley & Sons, Ltd.
Design of a Novel Haptic Joystick for the Teleoperation of Continuum-Mechanism-Based Medical Robots

Continuum robots are increasingly used in medical applications and the master–slave-based architectures are still the most important mode of operation in human–machine interaction. However, the existing master control devices are not fully suitable for either the mechanical mechanism or the control method. This study proposes a brand-new, four-degree-of-freedom haptic joystick whose main control stick could rotate around a fixed point. The rotational inertia is reduced by mounting all powertrain components on the base plane. Based on the design, kinematic and static models are proposed for position perception and force output analysis, while at the same time gravity compensation is also performed to calibrate the system. Using a continuum-mechanism-based trans-esophageal ultrasound robot as the test platform, a master–slave teleoperation scheme with position–velocity mapping and variable impedance control is proposed to integrate the speed regulation on the master side and the force perception on the slave side. The experimental results show that the main accuracy of the design is within 1.6°. The workspace of the control sticks is −60° to 110° in pitch angle, −40° to 40° in yaw angle, −180° to 180° in roll angle, and −90° to 90° in translation angle. The standard deviation of force output is within 8% of the full range, and the mean absolute error is 1.36°/s for speed control and 0.055 N for force feedback. Based on this evidence, it is believed that the proposed haptic joystick is a good addition to the existing work in the field with well-developed and effective features to enable the teleoperation of continuum robots for medical applications.
THE EFFECT OF ENCLOSURE SIZE ON NATURALCONVECTION IN A CUBE ENCLOSURE WITHMULTIPLE INTERNAL ISOLATED PLATES

The natural convection heat transfer in a cube enclosure with multiple internal isolatedplates has been simulated using 3D SIMPLEN program. It is found that with the increase ofL/H, the Nusselt numbers of every plate decrease quickly and then increase slowly. Thereis an enclosure-size (for vertical plates L/H=1.7, for horizontal plates L/H =1.8) whichwill deteriorate the ability of heat transfer of the plates group. When L/H 3, the effect ofL/H on the heat transfer of the plates group is very little.
A Cascade Model of Wave Turbulence with Applications to Surface Gravity and Capillary Waves

A heuristic approach to the derivation of power spectra of wave motion is described and applied to capillary waves. The case of gravity waves studied earlier is briefly reviewed. In contract to the previous studies, the nonlinearity of the wave motion is not required to be small, and the mean number of resonantly interacting wave harmonics is not limited to a smallest possible number (which is 4 for gravity waves on a deep fluid and 3 for capillary waves). The main external parameter of the problem is the input flux Q of the wave energy related to the mean wind velocity. Depending on its value, wave spectra take various forms---from that corresponding to the weak-turbulence limit to that corresponding to the saturated (Phillips') wave spectra.
A COMPARATIVE ANALYSIS OF LINEAR DISCRIMINANT, PRINCIPAL COMPONENT AND EVOLUTIONARY PURSUIT FOR RECOGNITION OF HUMAN FACES

— Face Recognition system is a computer based security system that can automatically detect and identify human faces. It is used to provide government facilities, in access control systems and detecting criminals. It is also used for video surveillance system in both on-line and off-line. Early face recognition algorithm uses simple geometric models and now the recognition process has matured into mathematical representation and matching process. The algorithms of face recognition system are Principal component analysis (PCA), Linear discriminant analysis (LDA), and Evolutionary pursuit (EP). In Principal component analysis, input image is compared with the face images which is divided into small sets of character feature through distance measuring methods. Linear discriminant analysis is used for recognizing human subject. This allows objective evaluation of the significance of visual information in different parts. Evolutionary pursuit implements strategies characteristics of genetic algorithm for searching the space of possible solutions to determine the optimal basis. The original data is projected into lower dimension whitened PCA space. In this paper a comparative study of different human faces is analyzed and implemented using the above three face recognition algorithm.
The SHADE cipher: an efficient hash-function-based Feistel network

We propose SHADE, a balanced Feistel network (H. Feistel, 1973; H. Feistel et al., 1975) that uses a modified hash function that accepts two fixed size inputs (each of which is the size of the function output) as the round function. This new hash function blends many of the concepts of MD5 and SHA-1, with some modifications and extensions. A complete description of the SHADE cipher, including key schedule, blocksize, round (hash) function, and number of rounds, is presented.
Enhanced multi-material 4D printing hybrid composites based on shape memory polymer/thermoplastic elastomer

An improved one-shot thermoplastic elastomer reinforced shape memory polymer (SMP) four-dimensional (4D) printing method for hybrid composite samples is proposed. Through the new reinforcement method of interlayer overlapping, the problem of inability to bond between polylactic acid (PLA) and thermoplastic polyurethane (TPU) is overcome, and the composite materials had excellent bonding properties. The feature of the improved manufacturing method is that the interface between PLA and TPU materials has continuous overlapping layers, and the boundary is wavy. Herein the complex multi-material space structure can be manufactured with a three-dimensional curved bonding surface. The shape memory and mechanical properties of the PLA/TPU hybrid composite sample are significantly improved via the improved printing method. The shape memory recovery rate of PLA/TPU hybrid composite samples are all over above 99.5%, which is close to complete recovery. The fastest recovery time is 40.61% shorter than the recovery time of the pure PLA sample, showing good shape memory cycle performance. The peak recovery force is 6.92 times higher than the recovery force of the pure PLA sample. The impact strength is 9.87 times higher than the impact strength of pure PLA sample. The composites 4D printing method can be utilized to process complex parts with excellent interfacial bonding properties, shape memory properties, and mechanical properties, which has a promising application prospect in the manufacturing of PLA-based sensors and actuators.