Miracle-dz/UniFAR-FTUs huggingface dataset:
Non-pulsating input and output current Cúk, SEPIC, Zeta and Forward converters for high-voltage step-up applications

Four families of non-isolated single-switch Cuk, SEPIC, Zeta and Forward converters are derived. They incorporate coupled-inductor, voltage-doubler and voltage clamping circuits to accomplish a high DC voltage step-up at high-efficiency levels. Besides Cuk and SEPIC, Zeta and Forward can also have the advantage of operating with continuous input and output currents, which provide accurate tracking of the maximum power point of photovoltaic modules and a reduction in the use of DC-link bulky electrolytic capacitors.
KNOWLEDGE DISCOVERY IN MANUFACTURING QUALITY DATA TO SUPPORT DESIGN DECISIONS

Product design is knowledge-intensive process and involves large quantities of decisions. The efficiency and effectiveness of these decisions depends on the provision of many kinds of related knowledge to designers from different sources throughout the lifecycle. Knowledge on product quality is one of the most important knowledge sources. To provide quality related knowledge, this paper proposed one data mining based knowledge discovery approach. First, decision making during the engineering design process is analyzed and classified into two main categories, namely organizational and technical decisions. Second, this paper analyzed and classified product design knowledge into three categories such as product, process and product support knowledge. Then knowledge needs of design decisions are also analyzed. Third, a data mining based quality related knowledge discovery approach is proposed. This approach can extract quality related knowledge from large volume of manufacturing quality data. This approach is illustrated by an example adapted from literature. Finally, some conclusions and future works are discussed.
Empty substrate integrated waveguide technology for E plane high‐frequency and high‐performance circuits

Substrate integrated circuits (SIC) have attracted much attention in the last years because of their great potential of low cost, easy manufacturing, integration in a circuit board, and higher‐quality factor than planar circuits. A first suite of SIC where the waves propagate through dielectric have been first developed, based on the well‐known substrate integrated waveguide (SIW) and related technological implementations. One step further has been made with a new suite of empty substrate integrated waveguides, where the waves propagate through air, thus reducing the associated losses. This is the case of the empty substrate integrated waveguide (ESIW) or the air‐filled substrate integrated waveguide (air‐filled SIW). However, all these SIC are H plane structures, so classical H plane solutions in rectangular waveguides have already been mapped to most of these new SIC. In this paper a novel E plane empty substrate integrated waveguide (ESIW‐E) is presented. This structure allows to easily map classical E plane solutions in rectangular waveguide to this new substrate integrated solution. It is similar to the ESIW, although more layers are needed to build the structure. A wideband transition (covering the frequency range between 33 GHz and 50 GHz) from microstrip to ESIW‐E is designed and manufactured. Measurements are successfully compared with simulation, proving the validity of this new SIC. A broadband high‐frequency phase shifter (for operation from 35 GHz to 47 GHz) is successfully implemented in ESIW‐E, thus proving the good performance of this new SIC in a practical application.
Closed-Loop Stabilization Over Gaussian Interference Channel

Abstract The problem of closed-loop stabilization of two scalar linear time invariant systems over symmetric white Gaussian interference channel with correlated noise components and arbitrarily distributed initial states is addressed. We propose to use linear and memoryless communication and control scheme based on the coding schemes introduced for interference networks which are an extension of the Schalkwijk-Kailath coding scheme. By employing the proposed communication and control scheme over the Gaussian interference channel, we derive sufficient conditions for mean square stability of the two linearly controlled LTI systems.
Unmanned aerial system

FIELD: transport. SUBSTANCE: invention relates to aircraft equipment. Unmanned aerial system (UAS) for non-aerodrome deployment contains unmanned aerial vehicle (UAV) and starting ground station which includes: mobile platform as well as power installation and UAV flight control unit positioned on this platform. UAV is made in the form of two-console wing with propulsors installed on its rockable consoles. The consoles are made capable to turn by 180° relative to wing longitudinal axis around frame for useful load. On the platform of ground starting station, power transmission shaft connected with reducing gear is installed vertically, and starting device is installed using three supports. The starting device contains facilities for transmitting rotation from transmission shaft to UAV as well as facilities for its locking and unlocking at the specified speed of transmission shaft rotation. Starting device supports are made telescopic with independent length adjustment from control unit for preflight correction of unmanned aerial vehicle orientation. The UAS is equipped with UAV preflight automatic static balancing system. EFFECT: increase in range and duration of action, as well as efficiency of unmanned aerial vehicle. 4 cl, 4 dwg
Role of Rac 1 and cAMP in endothelial barrier stabilization and thrombin‐induced barrier breakdown

Barrier stabilizing effects of cAMP as well as of the small GTPase Rac 1 are well established. Moreover, it is generally believed that permeability‐increasing mediators such as thrombin disrupt endothelial barrier functions primarily via activation of Rho A. In this study, we provide evidence that decrease of both cAMP levels and of Rac 1 activity contribute to thrombin‐mediated barrier break‐down. Treatment of human dermal microvascular endothelial cells (HDMEC) with Rac 1‐inhibitor NSC‐23766 decreased transendothelial electrical resistance (TER) and caused intercellular gap formation. These effects were reversed by addition of forskolin/rolipram (F/R) to increase intracellular cAMP but not by the cAMP analogue O‐Me‐cAMP which primarily stimulates protein kinase A‐independent signaling via Epac/Rap 1. However, both F/R and O‐Me‐cAMP did not increase TER above control levels in the presence of NSC‐23766 in contrast to experiments without Rac 1 inhibition. Next, we tested the role of Rac 1 and cAMP in thrombin‐induced barrier break‐down. Thrombin‐induced drop of TER and intercellular gap formation were paralleled by a rapid decrease of cAMP as revealed by fluorescence resonance energy transfer (FRET). The efficacy of F/R or O‐Me‐cAMP to block barrier‐destabilizing effects of thrombin was comparable to Y27632‐induced inhibition of Rho kinase but was blunted when Rac 1 was inactivated by NSC‐23766.
Response characteristic of high-speed on/off valve with double voltage driving circuit

High-speed on/off valve, an important part of turbocharging system, its quick response has a direct impact on the turbocharger pressure cycle. The methods of improving the response characteristic of high speed on/off valve include increasing the magnetic force of armature and the voltage, decreasing the mass and current of coil. The less coil number of turns, the solenoid force is smaller. The special armature structure and the magnetic material will raise cost. In this paper a new scheme of double voltage driving circuit is investigated, in which the original driving circuit of high-speed on/off valve is replaced by double voltage driving circuit. The detailed theoretical analysis and simulations were carried out on the double voltage driving circuit, it showed that the switching time and delay time of the valve respectively are 3.3ms, 5.3ms, 1.9ms and 1.8ms. When it is driven by the double voltage driving circuit, the switching time and delay time of this valve are reduced, optimizing its response characteristic. By the comparison related factors (such as duty cycle or working frequency) about influences on response characteristic, the superior of double voltage driving circuit has been further confirmed.
Lower leg swelling and muscle co-contraction during prolonged standing: an unstable footwear evaluation

The purpose of this study was to investigate the lower leg swelling and muscle co-contraction during prolonged standing with the focus on unstable footwear effects. The EMG signals of medial gastrocnemius and tibialis anterior muscles (bilaterally) were continuously recorded to quantify their co-contraction index (CCI) in 10 healthy asymptomatic subjects during two hours of standing in three footwear conditions including barefoot, stable shoe and unstable shoe. Lower leg circumference changes (swelling) were also monitored over the standing time. During two hours of standing remarkable reduction in lower leg circumference changes and significant reduced CCI level for both legs were observed only for unstable shoe compared to barefoot condition. However, bilaterally, no significant differences were found for both measures between barefoot condition and stable shoe or between two shoe conditions (stable and unstable). The unstable shoe produced changes in activity pattern of lower leg muscles which seems to be advantageous for venous pump mechanism during prolonged standing. These findings suggest that unstable footwear can be used as ergonomic intervention for prolonged standing during work or daily activities.
Indoor Human Localization System Based on RF and PIR Sensors

Indoor localization is used in many applications like security, health care, location based services and social networking. The presence of metallic structures and change of conditions in the environment (e.g. distribution of furniture, people presence and movement, opening and closing of doors) increase localization error in fingerprinting based localizations systems. To overcome this, we develop a localization system using Radio Frequency (RF) and Pyroelectric Infrared (PIR) sensors. Our localization system has two stages. In the first stage, the zone of the target person is identified by PIR sensors. In the second stage, RF fingerprints within the identified zone are used to estimate the position the person using K-Nearest Neighbors (K-NN) algorithm. Since PIR sensors have high capability of human detection within its sensing range, outlier fingerprints are excluded from the localization process. Simulation results indicate that the proposed method outperforms fingerprinting method and it is useful in environments with high Received Signal Strength (RSS) variation. Keywords—Indoor localization; Fingerprinting; ZigBee; RF; PIR sensors.
Analisis dan Implementasi Protokol Otentikasi FIDO U2F

It is known that password itself is not enough for formidable authentication method since it has a lot of vulnerabilities. Multi factor authentication (MFA) is introduced for the next generation for good authentication to address that issue. MFA combines two or more of three principles of good security, “something you know”, “something you have”, and “something you are”. Most MFA mechanisms work as one time passwords (OTP). However, they can still be vulnerable to phishing and MiTM attack. On top of that, OTP can be hard to use as it requires user to input another password given by the device (SMS, token, authenticator). Implemented in small USB U2F device, FIDO U2F delivers easier yet stronger security on authentication process which implements public key cryptography, challenge-response protocol, and phishing and MitM protection. Index Terms— Authentication protocol, FIDO U2F, Multi factor authentication, OTP
An x-ray survey of clusters of galaxies

The results of the HEAO 1 A-1 X-ray survey of galaxy clusters are reported. X-ray error boxes and intensities are presented for all clusters in the Abell catalog and for the catalog of southern clusters and groups compiled by Duus and Newell (1977). A correlation is derived on the basis of the X-ray luminosity function for 2-6 keV which may be used to calculate the contribution of clusters to the diffuse X-ray background at different energies. The cluster X-ray is estimated to be 9.3 percent (+ 1.9 or - 1.5 percent). Correlations between X-ray luminosity and other cluster properties are exmained, and it is found that the distribution of upper limits may be applied to obtaining a more precise estimate of the average X-ray luminosity of clusters. The Abell richness class and southern cluster concentrations were strongly correlated with X-ray luminosity. Correlations between optical x-ray luminosity and optical radius velocity dispersion, spiral fraction, and radio power are analyzed. The evidence for all these correlations was considered to be weak because of poor scatter in the data.
Swarm robotics: Cooperative navigation in unknown environments

Swarm Robotics: Cooperative Navigation in Unknown Environments Swarm Robotics is garnering attention in the robotics field due to its substantial benefits. It has been proven to outperform most other robotic approaches in many applications such as military, space exploration and disaster search and rescue missions. It is inspired by the behavior of swarms of social insects such as ants and bees. It consists of a number of robots with limited capabilities and restricted local sensing. When deployed, individual robots behave according to local sensing until the emergence of a global behavior where they, as a swarm, can accomplish missions individuals cannot. In this research, we propose a novel exploration and navigation method based on a combination of Probabilistic Finite Sate Machine (PFSM), Robotic Darwinian Particle Swarm Optimization (RDPSO) and Depth First Search (DFS). We use V-REP Simulator to test our approach. We are also implementing our own cost effective swarm robot platform, AntBOT, as a proof of concept for future experimentation. We prove that our proposed method will yield excellent navigation solution in optimal time when compared to methods using either PFSM only or RDPSO only. In fact, our method is proved to produce 40% more success rate along with an exploration speed of 1.4x other methods. After exploration, robots can navigate the environment forming a Mobile Ad-hoc Network (MANET) and using the graph of robots as network nodes.
Adaptive control of a one-legged hopping robot through dynamically embedded spring-loaded inverted pendulum template

ADAPTIVE CONTROL OF A ONE-LEGGED HOPPING ROBOT THROUGH DYNAMICALLY EMBEDDED SPRING-LOADED INVERTED PENDULUM TEMPLATE Ismail Uyanik M.S. in Electrical and Electronics Engineering Supervisor: Prof. Dr. Omer Morgul August 2011 Practical realization of model-based dynamic legged behaviors is substantially more challenging than statically stable behaviors due to their heavy dependence on second-order system dynamics. This problem is further aggravated by the difficulty of accurately measuring or estimating dynamic parameters such as spring and damping constants for associated models and the fact that such parameters are prone to change in time due to heavy use and associated material fatigue. In the first part of this thesis, we present an on-line, model-based adaptive control method for running with a planar spring-mass hopper based on a once-per-step parameter correction scheme. Our method can be used both as a system identification tool to determine possibly time-varying spring and damping constants of a miscalibrated system, or as an adaptive controller that can eliminate steady-state tracking errors through appropriate adjustments on dynamic system parameters. We use Spring-Loaded Inverted Pendulum (SLIP) model, which is the mostly used, effective and accurate descriptive tool for running animals of different sizes
Perturbation Confusion and Referential Transparency:Correct Functional Implementation of Forward-Mode AD

It is tempting to incorporate dierentiation operators into functional-programming languages. Making them rst-class citizens, however, is an enterprise fraught with danger. We discuss a potential problem with forward-mode AD common to many AD systems, including all attempts to integrate a forward-mode AD operator into Haskell. In particular, we show how these implementations fail to preserve referential transparency, and can compute grossly incorrect results when the dierentiation operator is applied to a function that itself uses that operator. The underlying cause of this problem is perturbation confusion, a failure to distinguish between distinct perturbations introduced by distinct invocations of the dierentiation operator. We then discuss how perturbation confusion can be avoided.
The rational Picard group of the moduli space of Riemann surfaces with spin structure

An extension telephone system communicates with a conventional subscriber telephone line where the subscriber's line telephone is located, through available AC power wires which carry signals that may be modulations of RF carrier frequencies and which are coupled to the power wires. Incoming telephone line signals are detected and modulate a first RF carrier frequency which is coupled to the AC power wires at the line telephone location and these signals are coupled from the AC power wires at an extension telephone location, and, demodulated and fed to an extension telephone which is energized by DC power derived from the AC power wires at the extension location. The extension telephone produces extension telephone signals which modulate a second RF carrier frequency which is coupled to the AC power wires at the extension location and this modulated carrier is coupled from the AC power wires and demodulated at the line telephone to produce the extension telephone signals in suitable form for applying to the telephone line. Thus, telephone calls to the subscriber's line telephone can be received by the extension telephone and calls to the telephone extension telephones can be connected to this system wherever there is access to the same AC power wires.
The design and application of SuRFR : an R package to prioritise candidate functional DNA sequence variants

xxi Thesis Lay Summary . xxii Abbreviations. xxiv Chapter 1: Introduction. 1 1.1 The study of human disease and complex traits . 1 1.2 Psychiatric illness . 5 1.3 A summary of potential disease models . 8 1.3. 1 De novo mutations . 8 1.3. 2 Rare variants . 9 1.3. 3 Common variants . 11 1.3. 4 Polygenic model . 16 1.3. 5 Epistasis . 17 1.3. 6 Overlap between psychiatric disorders . 19 1.3. 7 Complex Architecture. 22 1.4 Contribution of regulatory variants to disease . 23 1.5 Thesis Aims . 29 Chapter 2: Design of a SNP prioritisation method and a spiking strategy . 30 2.1 Introduction. 30 2.1.1 The problem: identifying regulatory variants . 30 2.1.2 Publically available genomic annotation data . 31 2.1.3 Lack of an appropriate method to prioritise variants . 35
Changes in Z‐BMI and Dietary Intake in Children Participating in a Community‐based Weight Management Program

Reducing the rate of weight gain is critical for overweight young children to avoid obesity in adolescence which is highly predictive of adult obesity. South County Food Fitness and Fun is a community‐based, 16‐week program for 6‐10 year old children referred by their physicians with BMI > 85%. The purpose of this study was to evaluate preliminary results among children completing the intervention. Completers (n=71; mean age=8.6±1.2 years, BMI=24.5±4.0 kg/m2, 61% female) decreased Z‐BMI from 2.0±0.6 baseline to 1.9±0.6 post program (p<.001). Among those with 2‐year follow‐up (n=33), Z‐BMI decreased from 1.9±0.4 baseline to 1.7±0.6 2‐year follow‐up (p=.03). Dietary variables were assessed pre and post intervention by the Harvard Youth/Adolescent Food Frequency Questionnaire; participants with complete dietary data (n=69) decreased energy intake from 2116±504 kcal to 1886±424 kcal (p<.001) as well as decreased saturated fat from 10.3±1.6 % kcal to 9.9±1.7 % kcal (p<.05) and sodium from 2634±677 mg to 2339±523 mg (p<.001). Dietary fiber increased from 8.6±2.0 grams/1,000 kcal to 9.6±2.3 grams/1,000 kcal (p<.001). There were no changes in calcium, Vitamin D, added sugar, or potassium. In conclusion, this intervention program was associated with a reduction in the rate of weight gain in overweight children as well as an improvement in dietary quality, thus could help reduce the risk of these children becoming obese adults.
Hybrid simulation of structural systems with online updating of concrete constitutive law parameters by unscented Kalman filter

Online model updating in hybrid simulation (HS) can represent an effective technique to reduce modeling errors of parts numerically simulated, that is, numerical substructures, especially when only a few critical components of a large system can be tested, that is, physical substructures. As a result, in an enhanced HS with online model updating, parameters of constitutive relationship can be identified based on experimental data provided by physical substructures and updated in numerical substructures. This paper proposes a novel method to identify constitutive parameters of concrete laws with unscented Kalman filter (UKF). In order to implement UKF, parts of the source codes of the OpenSEES software were modified to compute estimated measurements. Prior to experimental HS, a parametric study of UKF constitutive law parameters was conducted. As a result, the effectiveness of the UKF combined with OpenSEES was validated through numerical simulations, a monotonic loading test on a concrete column and real‐time HSs of a reinforced concrete frame run with both standard and model‐updating techniques based on UKF.
Digitally Controlled Single-inductor Multiple-output Synchronous DC-DC Boost Converter with Smooth Loop Handover Using 55 nm Process

This paper reports on a single-inductor multiple-output step-up converter with digital control. A systematic analog-to-digital-controller design is explained. The number of digital blocks in the feedback path of the proposed converter has been decreased. The simpler digital pulse-width modulation (DPWM) architecture is then utilized to reduce the power consumption. This architecture has several advantages because counters and a complex digital design are not required. An initially designed unit-delay cell is adopted recursively for the construction of coarse, intermediate, and fine delay blocks. A digital limiter is then designed to allow only useful code for the DPWM. The input voltage is 1.8 V, whereas output voltages are 2 V and 2.2 V. A co-simulation was also conducted utilizing PowerSim and Matlab/Simulink, whereby the 55 nm process was employed in the experimental results to evaluate the performance of the architecture.
Development of Two Positions and Two Channels Grease Valve Driven by Stepper Motor

A design scheme of two positions two channels grease valve driven by stepper motor was proposed, and the design of valve core and driving device was introduced. This scheme used stepping motor as the driving, and the thrust was greatly increased, and it was able to work stably under 40MPa. The two positions two channels valve spool in using, not required of the laying of oil return pipeline, reduced the cost of the system, and was able to form a stable back pressure. The clip and tighten pressure of the valve core was effectively reduced by using a pressure reducing groove. Through the test of the nominal pressure, nominal flow, pressure loss and maximum allowable back pressure, it is shown that the designed two positions two channels grease valve driven by stepper motor can effectively improve the reliability of intelligent grease centralized lubricating system, and it can improve the safety of lubrication equipment. Keywords-grease valve; centralized grease; lubricating system; stepper motor