Miracle-dz/UniFAR-FTUs huggingface dataset:
Synthesis of compact UWB bandpass filter with improved performances

This article presents a synthesis of the ultra‐wideband bandpass (UWB) filters consisting of two short‐circuited stubs combined with two stages of stepped impedance resonators (SIRs). The practical and theoretical transfer functions of the proposed UWB filters are derived. An example filter is firstly theoretically‐designed by the proposed synthesis procedure, then optimized by EM simulator, fabricated in microstrip line and finally characterized by a network analyzer. A good agreement between the theoretical and experimental results validates the proposed synthesis procedure successfully. In addition, the results of the designed filter show that the characteristics of the new filter is even better than those of a conventional filter composed of three‐stage of SIRs but without stubs. This means the proposed filters have compact sizes compared with the conventional ones. The designed filter also exhibits good characteristics of low insertion losses, quite sharp skirts, a flat group delay, deep attenuations in stopband (especially in lower one), and satisfies even FCC outdoor specifications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1268–1271, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25172
Natural Convection Flow over Wavy Horizontal Surface

In this paper boundary layer analysis is performed over a heated horizontal wavy surface. The governing boundary layer equations are transformed into parabolic partial differential equations with the help of appropriate coordinate transformation. Parabolic partial differential equations are then solved numerically with finite difference scheme, seeking details of the momentum and energy fields. Step by step computations are done for the upstream, downstream, and entire regimes. The numerical results are thoroughly discussed in terms of local skin friction and local Nusselt number coefficients for various parameters, like phase shift parameter, φ, and amplitude of the wavy surface, a. In addition, streamlines and isotherms are also drawn in order to visualize velocity and temperature distributions, respectively, within the boundary layer region.
Apache Nemo: A Framework for Optimizing Distributed Data Processing

Optimizing scheduling and communication of distributed data processing for resource and data characteristics is crucial for achieving high performance. Existing approaches to such optimizations largely fall into two categories. First, distributed runtimes provide low-level policy interfaces to apply the optimizations, but do not ensure the maintenance of correct application semantics and thus often require significant effort to use. Second, policy interfaces that extend a high-level application programming model ensure correctness, but do not provide sufficient fine control. We describe Apache Nemo, an optimization framework for distributed dataflow processing that provides fine control for high performance and also ensures correctness for ease of use. We combine several techniques to achieve this, including an intermediate representation of dataflow, compiler optimization passes, and runtime extensions. Our evaluation results show that Nemo enables composable and reusable optimizations that bring performance improvements on par with existing specialized runtimes tailored for a specific deployment scenario. Apache Nemo is open-sourced at https://nemo.apache. org as an Apache incubator project.
Parameters of saccadic eye movements in reading and dot scanning tasks

Abstract Gaze transfer can be influenced by cognitive processes, and previous studies show that the reading process can be performed automatically. Gaze parameters were studied in successive reading and compared after performing two different tasks: reading of the artificially constructed text and scanning of the points distributed in lines. During successive reading the number of saccadic regressions is diminishing, the average saccade amplitude tends to increase, while the overall distributions of amplitudes remain practically the same, which shows that the task is being performed automatically. Amplitude distributions are individual in both the tasks. In the point scanning task the fixation amplitudes have been found to be on average 90 ms longer than in that of text reading for all participants. Skata pārnesi var ietekmēt kognitīvi lēmumi, un iepriekš veikti pētījumi rāda, ka lasīšanas procesā skata pārnese var notikt automātiski. Mēs pētījām skata pārneses parametrus, atkārtoti lasot līdzīgus tekstus. Salīdzinājām arī sakāžu parametrus, lasot mākslīgi konstruētus tekstus un skenējot līnijās sakārtotus punktus. Ir novērots, ka atkārtotas lasīšanas gadījumā samazinās regresīvo sakāžu skaits un sakāžu amplitūdām ir tendence palielināties, taču sakāžu amplitūdu sadalījumu raksturs saglabājas. Tas norāda, ka lasīšanā skata pārnese tiek veikta automātiski. Sakāžu amplitūdu sadalījumi punktu skenēšanas uzdevumā un, lasot tekstu, ir individuāli ikvienam no dalībniekiem. Visiem dalībniekiem punktu skenēšanas uzdevumā fiksāciju laiki vidēji ir par 90 ms garāki nekā lasīšanā.
Information Inference based on Barometer Sensor in Android Devices

Most modern smartphones are equipped with barometer sensors. Accessing barometers does not require any permission or user notification, as it is deemed to be harmless. We show, however, that by simply reading low-rate barometer’s samples, any background application can detect user’s finger taps on the device’s touch screen, and infer information about the positions of the taps. This can reveal sensitive information to background applications that, for security reasons, do not have access to the touch screen input. In addition, we show that barometers’ samples reveal information about the smartphone’s speaker activity. Specifically, using simple machine learning and classification methods, we detect with high accuracy whether the speaker is silent or playing a given sound such as a ringtone.
A Multiphase AC–DC Converter With Improved Power Quality for EV Charging Station

This work presents a multiphase ac–dc converter-based electric vehicle (EV) charging station that is designed to meet IEEE-519 power-quality (PQ) standard. The proposed EV charging station draws current from the utility grid at low total harmonic distortion (THD) and high power factor (PF), without using PF corrector and active/passive filter circuits. This study evaluates an 18-phase ac–dc converter for an EV charging station, which consists of three single-phase multiwinding transformers (MWTs) and diode rectifiers. MWTs are connected to enable direct conversion of a three-phase utility supply into an 18-phase power supply that reduces the measured THD in the input line current. The ac–dc conversion stage of the proposed EV charging station is found to be reliable and operates at line-frequency, without the need for high-frequency active switches. For charging an EV in constant current (CC) and constant voltage (CV) mode, a multiphase (interleaved) dc–dc converter is used. MATLAB/Simulink environment is used to evaluate the performance of the proposed EV charging station in terms of THD and PF. The results are validated through an on-the-bench prototype hardware setup of the proposed EV charging station.
VASCULAR PATTERNS AND MORPHOLOGY IN DERMOSCOPY - PART I. BASIC PRINCIPLES

Dermoscopy is a noninvasive, in vivo technique that increases the diagnostic accuracy in both melanocytic and nonmelanocytic skin tumors. In nonpigmented tumors allows the visualization of vascular structures not visible to the naked eye. Part I of this article discusses the dermoscopic evaluation of nonpigmented skin tumors including basic princi- ples of specific morphologic types and architectural arrangement of vessels and the presence of additional dermoscopic clues.
SAFETY MARGINS OF SUSPENSION BRIDGES UNDER SEISMIC CONDITIONS

The American Association of State Highway and Transportation Officials (AASHTO) 1983 code, "Seismic Design of Highway Bridges," does not cover explicitly suspension bridges. Nevertheless, if AASHTO earthquake excitation is applied to some existing suspension bridges, even those of strategical importance, for example, the Golden Gate bridge, the structural safety of these bridges cannot be proven. The need for new standards is also widely recognized in Japan. Analyses that have appeared in the literature are reviewed. A criterion to select the design earthquake is proposed and its relevance on the previous safety analyses is shown.
Piezoelectric actuation: State of the art

Significant advances in smart material actuators have taken place in the past decade. The holy grail of actuator research is an architecture that can generate high displacement and force throughout a broad frequency range while not consuming a significant amount of electrical power. The large appeal of using smart material actuators stems from their high mechanical energy density. However, all smart material actuators generally have at least one shortcoming involving either mechanical stroke, force, or frequency capability. Whenever speed is a consideration, piezoelectric actuation is the most commonly employed. The purpose of this paper is to review the most current trends in piezoelectric actuation architectures. The paper does not present the theoretical details of each actuator, but instead strives to highlight the novel concepts used in each design to overcome the stroke limitation of the material.
Design and Implementation of 10Gbps All-Optical 2R Regenerator

An All-optical 2R regenerator (Reamplification and Reshaping) is a crucial element in optical communication systems in order to increase transmission performance. In this paper, an all-optical 2R regenerator is implemented by self-phase modulation (SPM) based spectral broadening and offset filtering. Design calculations of the required parameters for the proposed 2R regenerator are carried out. Simulation results in terms of power transfer and bit error rate (BER) measurements are shown to prove the effectiveness of the proposed system. After the optical signal has been degraded by 500 km- long transmission span, the 2R regenerator in this work can reshape the degraded signal by achieving only 0.3dB power penalty at BER of 10 -9 .
Novel tunneling diodes for a high performance infrared rectenna

Title of dissertation: NOVEL TUNNELING DIODES FOR A HIGH PERFORMANCE INFRARED RECTENNA Kwangsik Choi Doctor of Philosophy, 2011 Dissertation directed by: Prof. Martin Peckerar Department of Electrical and Computer Engineering Since the 1960s, metal-insulator-metal (MIM) tunneling diodes have been used for detecting and mixing electromagnetic waves up to infrared frequencies. To improve the wave coupling efficiency, an antenna is usually integrated with a MIM diode, and this integrated structure is known as a “rectenna” which can rectify incident waves. Although antenna coupled MIM diodes can detect and rectify infrared waves, the energy conversion efficiency of these structures is usually very low largely because of the response time of the tunnel junction. This thesis summarizes an attempt to improve the power conversion efficiency of the rectenna. As a result, novel tunneling diodes have been developed using a geometric field enhancement (GFE) technique, which takes advantage of the “lightning rod” effect. The GFE technique is implemented by using a pointed electrode, creating an asymmetric electric field in the region of the tunnel barrier. Thus, the tunneling current in this system can be asymmetric with respect to the sign of the applied bias. Furthermore, the geometric structure of these novel optical rectennas provides the appropriate conditions for the excitation of surface plasmon resonances. These resonances further enhance the junction’s electric field, allowing for larger current flow, effectively lowering the diodes tunneling resistance. Three different types of tunneling diodes are developed and explored in this research: a perfect planar type tunneling diode, an asymmetric tunneling diode (ATD), and a focused asymmetric metal-oxide-metal (FAMIM) tunneling diode. The fabrication processes for each new tunneling diode have been successfully developed. The degree of performance improvement achieved by each process is summarized. This thesis documents the highest MIM detection sensitivities of 31 V −1 and 22 V −1 reported in open literature for planar type tunneling diodes and ATDs, respectively. Improvements in tunneling current nonlinearity (curvature of the current-voltage plot) of 350 % and 33 % are achieved for ATDs and FAMIM diodes, respectively. NOVEL TUNNELING DIODES FOR A HIGH PERFORMANCE INFRARED RECTENNA
Pavement characteristics affecting the frequency content of tire/pavement noise

Tire/pavement noise is a major contributor to traffic noise at highway speeds. Annoyance is more closely related to frequency content than to overall A-weighted noise levels, therefore spectral content analysis of tire/pavement noise is an important consideration. A study conducted in California measured the noise levels of different mix types and the pavement characteristics affecting noise levels as determined by on-board sound intensity (AASHTO TP 76-08). Data was collected on dense-graded asphalt concrete mixes (DGAC), conventional open-graded mixes (OGAC), open-graded rubberized asphalt concrete mixes (RAC-O), and gap-graded rubberized asphalt concrete mixes (RAC-G) with ages less than 8 years old. This paper evaluates the effects of pavement characteristics including the air-void content, gradation properties, rubber inclusion, roughness, texture, pavement surface condition, and age on one-third octave band noise levels. This research confirmed that macrotexture and IRI, which are associated with the impact and shock mechanisms, increase the noise levels at lower frequencies. Higher air-void content, associated with the air pumping mechanism, reduces the noise levels at higher frequencies.
Rate Effects in Isolated Turtle Hearts Induced by Microwave Irradiation

Microwave irradiation at 960-MHz CW of isolated poikilothermic hearts in Ringer's solution causes bradycardia. Tachycardia is usually produced by generalized heating, suggesting the possibility of a different mechanism in this case. The effect occurs only over a narrow power range of approximately 2-10 mW/g absorbed by the heart. It is hypothesized that microwave radiation causes neurotransmitter release either by excitation of the nerve remnants in the heart, or by some other mechanism, producing bradycardia over a restricted range of power absorption. Drugs which can change the response of the heart to transmitter substances have been used, and the results support a neurotransmitter release hypothesis. A generalized heating effect, causing tachycardia, is predominant at higher levels of absorbed power.
The Application of BP Neural Network In Oil-Field

Aiming at the situation that many techniques of production performance analysis acquire lots of data and are expensive considering the computational and human resources, and their applications are limited, this paper puts forward a new method to analyze the production performance of oil-field based on the BP neural network. It builds a dataset with some available measured data such as well logs and production history, then, builds a field-wide production model by neural network technique, a model will be used to predict. The technique is verified, which shows that the predicted results are consistent with the maximum error of rate of oil production lower than 7% and maximum error of rate of water production lower than 5%, having certain application and research value. DOI: http://dx.doi. org/10.11591/telkomnika.v11i9. 3280
Synthesis of shaped-beam pattern for mobile antenna

In a mobile communication system, the base station antennas are often required to radiate shaped-beam patterns, which have as low a level as possible toward the interference zone where the same frequency is used and, conversely, have as high a level as possible toward the service zone. So, the synthesis of the shaped-beam pattern is one of great importance to designing the base station antennas. We present a new synthesis method of the shaped-beam pattern by controlling only the excitation phases of the array elements. We first apply array theory and optimization theory to construct an objective function. Then, we employ the quasi-Newton method to minimize this nonlinear problem. Two synthesis examples based on the 16-element linear arrays are presented to demonstrate the efficiency of our method.
DISENO DE UN ROB-DISTRIBUIDO PARA PROCESADORES SUPERESCALARES

II Índice de contenido. III Índice de Figuras. V Índice de Tablas. VII Capítulo 1 Introducción. 1 1.1. Antecedentes. 2 1.2. Planteamiento del Problema. 4 1.3. Justificación. 4 1.4. Objetivos. 5 1.5. Organización del Trabajo. 5 Capítulo 2 Estado del Arte. 7 2.1. El procesador MIPS R10000. 7 2.1.1. La Lista de Instrucciones Activas del MIPS R10000. 9 2.2. El procesador Alpha 21264. 10 2.2.1. La Ventana de Instrucciones del Procesador Alpha 21264. 12 2.3. Los procesadores Pentium 3 y 4. 12 2.3.1. El Búfer de Reordenamiento de Instrucciones en NetBurst. 16 2.4. Propuestas recientes. 17 Capítulo 3 Marco Teórico. 24 3.1. Los Procesadores Superescalares. 24 3.1.1. Paralelismo a nivel de instrucción y ejecución fuera de orden. 25 3.1.2. La Ventana de Instrucciones y el ROB. 27 3.2. Herramientas de Software para la simulación de Arquitecturas. 30 3.2.1. El conjunto de herramientas de simulación SimpleScalar. 31 3.2.2. El simulador sim-outorder. 32 Diseño de un ROB-Distribuido para Procesadores Superescalares IV Capítulo 4 Diseño del ROB. 35 4.1. Metodología de diseño. 35 4.2. Criterios de diseño. 36 4.2.1. Análisis de las instrucciones de control de flujo. 36 4.2.2. Esquemas de recuperación del estado del procesador. 38 4.3. Arquitectura del diseño propuesto. 40 4.3.1. Ejecución especulativa de instrucciones. 42 4.3.2. Reciclado de registros físicos. 43 4.3. 3. Retiro grupal de instrucciones. 44 4.4. Modelado y Simulación del diseño. 45 4.4.1. Modificación del código de SimpleScalar. 45 4.4.2. Modelo de la arquitectura propuesta. 48 4.4.3. Optimización del proceso de recuperación. 52 4.5. Proceso de simulación de la arquitectura propuesta. 53 Capítulo 5 Pruebas y Resultados. 56 5.1. Descripción de las estadísticas estudiadas. 56 5.2. Análisis y evaluación del IPC. 57 5.3. Reducción de la ejecución de instrucciones en traza equivocada. 59 5.4. Incremento en la velocidad de ejecución de instrucciones. 61 5.5. Ocupación del ROB. 62 Capítulo 6 Conclusiones y Trabajo Futuro. 64 6.1. Conclusiones. 64 6.2. Trabajo Futuro. 65 Referencias Bibliográficas. 67 Glosario. 70 Anexo A. 72 Diseño de un ROB-Distribuido para Procesadores Superescalares
Enhanced Upper Bound for Erasure Recovery in SPC Product Codes

Single parity check (SPC) product codes are simple yet powerful codes that are used to correct errors and/or recover erasures. The focus of this paper is to evaluate the performance of such codes under erasure scenarios and to develop a closed‐form tight upper bound for the post‐decoding erasure rate. Closed‐form exact expressions are derived for up to seven erasures. Previously published closed‐form bounds assumed that all unrecoverable patterns should contain four erasures in a square. Additional non‐square patterns are accounted for in the proposed expressions. The derived expressions are verified using exhaustive search. Eight or more erasures are accounted for by using a bound. The developed expressions improve the evaluation of the recoverability of SPC product codes without the need for simulation or search algorithms, whether exhaustive or novel.
Non-binary capacitor array calibration for a high performance successive approximation analog-to-digital converter

Finally I would like to thank my wife, my parents, my brother and my sister for their constant love, support and encouragement. I especially wish to thank my wife for her understanding and caring. It is very challenging to build precise analog circuits in deep sub-micron and nanometer VLSI fabrication technology. Advanced calibration methods are crucial in designing high performance analog and mixed-signal VLSI circuits. We present a non-binary capacitor array calibration method for a high performance successive approximation analog-to-digital converter (ADC). We show that the capacitor weights are successively refinable under the Markov condition using the rate-distortion theory. Using the analogy to discrete mem-oryless channel with interference known to the encoder, we show that the interference will not limit the final calibration accuracy if the calibration algorithm adapts to the interference. The capacitor array calibration algorithm is based on a perceptron learning rule, originally developed for Artificial Intelligence applications. It takes advantage of the redundancy in the non-binary capacitor array and the noise in the system to generate the learning cases. vii We propose a mixed-signal micro-controller architecture to efficiently implement the capacitor array calibration algorithm. A non-binary capacitor array with 20 capacitors is used to design a 16-bit successive approximation ADC. We discuss the design and trade-off of each circuit block in the ADC. We model the thermal noise, flicker noise, power supply interference, charge leakage and harmonic distortion in MATLAB. The calibration is robust under the influence of these nonidealities. The capacitor weights are adaptively calibrated to match the physical capacitors with up to 22-bit accuracy. Capac-itor matching is not a limiting factor to the accuracy. The calibration time is about 50 ms. The calibration algorithm can also be used in other mixed-signal circuits to relax the requirement on analog circuits.
The Unstable Ankle: A Combined EMG and Biomechanical Modeling Study

A device to simulate ankle motion associated with inversion ankle injury was constructed. This device consists of a trap door that can be tilted 30° from the horizontal plane. Surface EMG electrodes were placed over the peroneus brevis and peroneus longus muscles. The time measured from the tilting of the plate to the first muscular response on the EMG was defined as the reflex time. Twenty individuals with unilateral ankle joint instability were tested. The mechanical ankle joint stability was measured using standardized radiographic measurements, taking into account anterior talar translation and talar tilt. The mean anterior talar translation was 5.9 mm and the mean talar tilt was 3.2° in the stable ankles, compared to 12.7 mm and 10.5° for the unstable ankles. The mean reflex time was 68.8 ms (peroneus longus) and 69.2 ms (peroneus brevis) in the stable ankles as compared to 84.5 ms (peroneus longus) and 81.6 ms (peroneus brevis) in the unstable ankles. Important factors influencing functional instabi.
Scattering by a thick off-centered circular iris in circular waveguide

A formally exact solution is described for the problems of scattering at a junction between two circular waveguides with their axes offset and at a thick off-centered iris in a circular waveguide. The analysis method uses Graf's addition theorem for cylindrical functions and the conservation of complex power technique (CCPT). Sample numerical results are presented and compared with available data in the literature. >