Miracle-dz/UniFAR-FTUs huggingface dataset:
Simulation Design of Inverter in Solar Photovoltaic System Based on MCU

A used solar power generation system based on the control of the microcontroller single-phase full-bridge inverter is designed in this paper. Inverter main circuit for the full-bridge inverter structure is formed by four IRF830A with SPWM frequency modulation work. After analysis and comparison, area, and so follow the example set by SPWM wave to calculate the duty cycle and design controller. AT89S51 as a chip to control, based on the Proteus and KeilC integrated development environment for system software design, software debugging of hardware circuits finally, the results show that all parts of indicators meet the requirements.
Translating institutions: a missing factor in translation theory

Citer cet article Mossop, B. (1988). Translating institutions: a missing factor in translation theory. TTR : traduction, terminologie, rédaction, 1(2), 65– 71. https://doi.org/10.7202/037019ar Ce document est protégé par la loi sur le droit d'auteur. L'utilisation des services d'Érudit (y compris la reproduction) est assujettie à sa politique d'utilisation que vous pouvez consulter en ligne. [https://apropos.erudit. org/fr/usagers/politique-dutilisation/]
Simulation of micro-sources in a small scale microgrid

In this paper, four different micro-sources for a small scale microgrid are simulated using PSCAD. The micro-sources include photovoltaic (PV) array, proton exchange membrane (PEM) fuel cell, wind turbine and synchronous generators. As an energy storage device, lead-acid battery is also simulated. To obtain practical models for the above micro-sources, the effective parameters on each of the micro-sources' outputs are defined and considered. Even though this paper focuses on simulating the micro-sources of specific sizes, most of the results can be extended to higher power ratings for other applications.
Assessing the Relationship between Marketing Mix and Loyalty through Tourists Satisfaction in Jordan Curative Tourism

The aim of this paper is to explore the relationship between three key variables, namely Marketing Mix, satisfaction and loyalty in curative tourism industry in Jordan. The seven dimensions of the Marketing Mix employed in this study are product, price, promotion, physical evidence, place, personnel, and process. Out of 950 questionnaires, 690 were returned by the end of September, 2009. Each variable was measured using reliable developed scales: product (6 items), adapted from (Yuksel, 2004), price (6 items) by (Yuksel, 2004), physical evidence (6 items) by (Yuksel, 2004), promotion (9 items) by (Yuksel, 2004), place (4 items) by (Yuksel, 2004), process (4 items)by (Yuksel, 2004), personnel (5 items) by (Yuksel, 2004), and tourist satisfaction (5 items) by Lim et al (2006). Finally, destination loyalty (7 items) by Lim et al (2006) . Data was input into SPSS and analyzed used exploratory factor analysis (EFA). SPSS results indicate that there some hypotheses: results of this study were as follows: H1 show that product and place were significant on destination loyalty. While, price, personnel and process not significant on destination loyalty, and for H2 show that product, place, price, personnel and process significant impact on tourist satisfaction. In addition, H3 show that the tourist satisfaction mediates the relationship between Marketing Mix and loyalty.
Gene Therapy for Hemophilia: Clinical Trials and Technical Tribulations

As monogenic disorders, hemophilia A and B are compelling candidates for treatment with gene therapy. In hemophilia, a therapeutic benefit achieved by gene therapy should only require a modest increase in the endogenous factor level; response to treatment can be monitored easily; and there are relevant small and large animal models. The two main approaches aiming to restore factor VIII or factor IX production are based on genetically modified cells or direct in vivo gene delivery using viral or plasmid vectors. The progress toward gene therapy for hemophilia A and B in both preclinical and clinical models will be evaluated in this review. Various viral and nonviral vectors are discussed in the context of current hurdles arising from preclinical and clinical trials. Despite disappointing clinical results to date, there are favorable indications that the near future should deliver on the long-sought promise of a cure for hemophilia.
Stacked multilevel inverter fed six phase induction motor with reduced DC link and lower voltage devices

This paper proposes a novel configuration of six phase IM to drive from a three phase stacked multilevel inverter. Apart from greater fault tolerance compared to three phase, a six phase machine enables the use of low voltage devices for the inverter. Also the inverter used here is a three phase nine level stacked inverter which itself uses low voltage devices. Thus MOSFETs can be used for the inverter. The nine level inverter is formed by stacking 2 five level inverters each of which is developed by cascading an FC and a capacitor fed H-bridge. The inverter can be stacked further to obtain still higher number of voltage levels. This enables the use of batteries at the front end and still lower voltage devices which will significanly improve the efficiency. Hence this will find applications in electric vehicles because of the direct battery drive. Experiment is conducted on a 15 KW six phase IM by reconfiguring it as a three phase machine and driven by the three phase nine level stacked inverter using V/f control scheme. Detailed experimental results are provided to validate the concept.
Impact of different end region cooling arrangements on endwinding heat transfer coefficients in electric motors

In this paper the impact of different end region cooling arrangements on the endwinding heat transfer is analyzed. An experimental approach to the problem solving has been adopted: two “ad hoc” prototypes have been built, and a test bench has been assembled. Open Drip Proof “ODP” and Total Enclosed Fan Cooled “TEFC” frames have been taken into account. In addition the cooling effect of the fins always present in the induction motor cage end-rings have been analyzed too. The paper reports in detail the set up of the test procedures and the obtained results. Particular care has been devoted to the determination of the heat transfer coefficients concerning the thermal transfer between endwinding and external frame. The obtained results are of basic importance for the determination of the thermal resistances between endwindings and end caps to be utilized in thermal networks usually adopted in thermal model analysis.
Synthesis and characterization of metallic nanoparticles with photoactivated surface chemistries

During recent decades metallic nanoparticles have been found very interesting due to their unique characteristics which make them suitable for different applications. In this research, for the very first time, we tried to perform selective surface photo activation chemistry on the targeted facets of nanoparticles while they are in suspension. This technique enabled us to form desired assemblies of nanoparticles. We focused on elongated shaped gold nanorod due to its unique surface plasmon resonance and probable biomedical applications. In this research we formed a dumbbell shape assembly of nanoparticles in suspension. A probable application for these assemblies can be in vivo imaging. Initially, we reproduced gold nanorods using existing techniques in prior papers and optimized them according to our research needs. A low rpm centrifugal separation technique was developed to efficiently separate synthesized gold nanorods from other shapes. Several characterization techniques were utilized to characterize nanoparticles at each step including UV-absorbance, zeta potential, and dynamic light scattering. Different generations of oligomers were synthesized to be used as gold nanorods coating, and each coating was tested and characterized using appropriate techniques. Our two-step coating replacement method using one of these photocleavable oligomers enabled us to achieve, for the very first time, selective UV photo activation of gold nanorod tips. The photo activated tips were then exposed to oppositely charged gold nanospheres to form
Study of Bonding Wire Failure Effects on External Measurable Signals of IGBT Module

The relationship between bonding wire liftoff and terminal voltage in insulated gate bipolar transistor (IGBT) power module is studied. Bonding wire liftoff failure is one of the most dominant limiting factors to the reliability behavior of IGBT power module. In this paper, in order to monitor this type of fault, the effects of the typical degradations are considered. The parasitic inductance and gate equivalent capacitance of IGBT module change due to bonding wire liftoff, which have different impacts on the external characteristics. So, two aspects of IGBT module terminal characteristics are investigated to identify any measurable signature used for monitoring bond wire liftoff failures: 1) gate-emitter voltage during turn-on process and 2) collector-emitter voltage during turn-off process. This paper aims to provide useful information for further development in monitoring the health of IGBT module.
Model based inversion algorithms based on Bayesian Compressive sensing

A model-based inversion algorithm is presented within the contrast source formulation of the inverse scattering problem. The inversion technique assumes that the scatterers at hand are limited to small areas within wide investigation domains or that they can be expressed in terms of very few unknown coefficients thanks to suitable representation bases. Accordingly, the associated inverse problem is solved through a Bayesian Compressive approach by enforcing a sparsity constraint in the retrieved contrast sources by means of a suitable prior. A preliminary numerical assessment is carried out to point out the features and the potentialities of the proposed technique.
Obstacle avoidance in underwater glider path planning

Underwater gliders have revealed as a valuable scientific platform, with a growing number of successful environmental sampling applications. They are specially suited for long range missions due to their unmatched autonomy level, although their low surge speed make them strongly affected by ocean currents. Path planning constitute a real concern for this type of vehicle, as it may reduce the time taken to reach a given waypoint or save power. In such a dynamic environment it is not easy to find an optimal solution or any such requires large computational resources. In this paper, we present a path planning scheme with low computational cost for this kind of underwater vehicle that allows static or dynamic obstacle avoidance, frequently demanded in coastal environments, with land areas, strong currents, shipping routes, etc. The method combines an initialization phase, inspired by a variant of the A* search process and ND algorithm, with an optimization process that embraces the physical vehicle motion pattern. Consequently, our method simulates a glider affected by the ocean currents, while it looks for the path that optimized a given objective. The method is easy to configure and adapt to various optimization problems, including missions in different operational scenarios. This planner shows promising results in realistic simulations, including ocean currents that vary considerably in time, and provides a superior performance over other approaches that are compared in this paper.
Research on the Quantitative Structure-Carcinogenic Activity Relationship of N-Nitroso Compounds

According to the results of quantitative pattern recognition for 153 N-nitroso compounds (NNCs) based on Di-region theory, it is put forward that the esters formed from the metabolism of NNCs on beta- or gamma-position could be alkylating agents of DNA bases with the anchimeric assistance of the N-nitroso group. This viewpoint, combined with the conception of alpha-metabolism activation, can explain the structure-carcinogenic activity relationship reasonably. Quantum chemistry ab initio calculations are carried out to study the activity of different metabolites of NNCs in direct alkylation and the anchimeric assistant processes. By ONIOM method, a QM/MM calculation is carried out to study the crosslink of DNA base pair by methylalkylnitrosamines. Based on the computational results, the quantitative structure and carcinogenic activity relationship of 58 N-nitrosoureas that have got animal carcinogenicity tests reported are studied
Chemistry of hydrogen oxide radicals (HO x ) in the Arctic troposphere in spring

Abstract. We use observations from the April 2008 NASA ARCTAS aircraft campaign to the North American Arctic, interpreted with a global 3-D chemical transport model (GEOS-Chem), to better understand the sources and cycling of hydrogen oxide radicals (HOx≡H+OH+peroxy radicals) and their reservoirs (HOy≡HOx+peroxides) in the springtime Arctic atmosphere. We find that a standard gas-phase chemical mechanism overestimates the observed HO2 and H2O2 concentrations. Computation of HOx and HOy gas-phase chemical budgets on the basis of the aircraft observations also indicates a large missing sink for both. We hypothesize that this could reflect HO2 uptake by aerosols, favored by low temperatures and relatively high aerosol loadings, through a mechanism that does not produce H2O2. We implemented such an uptake of HO2 by aerosol in the model using a standard reactive uptake coefficient parameterization with γ(HO2) values ranging from 0.02 at 275 K to 0.5 at 220 K. This successfully reproduces the concentrations and vertical distributions of the different HOx species and HOy reservoirs. HO2 uptake by aerosol is then a major HOx and HOy sink, decreasing mean OH and HO2 concentrations in the Arctic troposphere by 32% and 31% respectively. Better rate and product data for HO2 uptake by aerosol are needed to understand this role of aerosols in limiting the oxidizing power of the Arctic atmosphere.
Password guessing time based on guessing entropy and long-tailed password distribution in the large-scale password dataset

Currently the password security is serious, but there is not an appropriate metric for measuring passwords. Thus, the main purpose of this paper is to provide a security time period for the user's password in an online system, allowing the user to modify the password before the security period arrives to prevent the attacker from guessing correctly. We use the guessing chain to calculate the expected time that the attacker need to guess the target password correctly based on the guessing entropy. We assume that the attacker uses a dictionary attack, which is also a probability sequence, and the dictionary is non-ordered or ordered. At the same time, we analyze the large-scale password dataset Rockyou, which contains nearly 32 million passwords. And we assume that the ordered dictionary is organized in descending frequency, in which the probability of the occurrence of the password obeys a long-tailed distribution. We explore the form of the distribution function. And we first find that the simple Zipf distribution can better fit with the empirical distribution of ordered dictionary.
Influence of Large Amounts of Nitrogen on Nonirrigated and Irrigated Soybean

Nitrogen supplied by N 2 fixation to soybean [Glycine max (L.) Merr. ] may not be sufficient to maximize yield. Field studies were conducted in 2002, 2003, and 2004 on Sharkey day soil (very-fine, smectitic, thermic Chromic Epiaquert) at Stoneville, MS (33°26' N lat). The objective was to determine the effect of high rates of N applied as a replacement for N 2 fixation in nonirrigated and irrigated environments. Eight cultivars ranging from Maturity Group II to IV were planted on 17 Apr. 2002, 2 Apr. 2003, and 25 Mar. 2004. Not all cultivars were evaluated in all 3 yr. Glyphosate herbidde was used in all 3 yr and a non-glyphosate herbicide treatment was applied in 2002. Cultivars grown in 2003 were also evaluated under an application of 21.3 kg ha -1 of Mn. All cultivar, herbicide, and Mn treatments were evaluated in irrigated and nonirrigated environments with fertilizer N (PlusN treatment) or without fertilizer N (ZeroN treatment). In the PlusN treatment, granular NH 4 NO 3 was surface applied at soybean emergence at rates of 290 kg ha -1 in 2002, 310 kg ha -1 in 2003, and 360 kg ha -1 in 2004. When analyzed over all management practices (years, cultivars, herbicide, and Mn treatments), the PlusN treatment resulted in significantly decreased ureide concentration (57.2 and 53.5% reduction) and significantly increased biomass accumulation (14.1 and 16.7%), N accumulation (12.8 and 28.1%), and seed yield (7.7 and 15.5%) for the irrigated and nonirrigated environments, respectively. The majority of the yield increase in each environment resulted from increased number of seed (9.5% irrigated and 16.2% nonirrigated). These results confirm the sensitivity of N 2 fixation to drought and indicate that N 2 fixation may limit yield of soybean grown in both irrigated and nonirrigated environments of the midsouthern USA, and that N 2 fixation deficiencies occur before the beginning of processes that determine number of seed.
Design of 60-GHz SIW short-slot couplers

The 0-dB and 3-dB 60-GHz SIW short-slot couplers designed based on a systematic approach are fabricated by a standard single-layer print circuit board process, which is more economical for mass-production than the advanced processes such as low temperature co-fired ceramic and thick-film process, etc. The systematic approach involves design equations, simulations and measurements. Starting with a set of explicit design equations for the short-slot couplers, one calculates the structure dimensions. The calculated dimensions are then optimized with full-wave simulation to finalize the design. With the use of noncoaxial multiport measurement technique, the characteristics of the components are acquired through a probe station and a two-port vector network analyzer. Measurement technique plays a critical role in the systematic design approach. By measuring at the intrinsic ports or the wave ports defined in the full-wave simulations, the couplers are ambiguously verified. The measured four-port S-matrices not only verify the SIW couplers, but also can be directly used in the follow-on design of the circuits with the integration of SIW couplers.
Comparison research on pid controller and model-free controller based on multi-innovation theory

We introduce the basic theory and design method of model-free learning adaptive controller (MFLAC) in this paper. Then a improve method of MFLAC based on multi-innovation theory is presented. Simulation results show that MFLAC and proposed MFLAC have better performance to PID controller for unstable system; what's more, the proposed model-free controller has faster convergence rate and better tracking performance.
FPGA and SoC based VLSI architecture of reversible watermarking using rhombus interpolation by difference expansion

This paper presents a VLSI architecture of rhombus interpolation based reversible watermarking by difference expansion. The proposed architecture have been implemented and tested on Xilinx Virtex-7 FPGA, Zynq SoC (System On Chip) and ultra-scale FPGA platforms. The system is based on the modified rhombus interpolation scheme to embed and extract the copyright protection for medical and military imaging applications. In the reversible watermarking, the embedded watermark can be completely extracted along with the original image in a lossless manner. The experimental result of the proposed architectures of the encoding and decoding process for reversible watermarking is implemented using VIVADO 2014.2. The results for quality factors of the original and watermarked image is obtained using MATLAB R2013a and compared with the result generated from hardware implementation in FPGA, SoC and Ultra-scale platform. The results show the viability of low cost, high speed and real-time use of the proposed VLSI architecture.
Stereo vision-based obstacle detection using fusion method of road scenes

Free space and on-road obstacle detection is one of the key functions for the implementation of the vision-based intelligent vehicle and robot navigation system. Stereo vision-based algorithm for this task is more realistic and precious compared with radar or lidar-based algorithms. In addition, accurate estimation results can indicate the current and approaching conditions in the complex traffic scenes. A fusion method which combines polar occupancy grid and probability model for free space detection is proposed in this paper. The spatial and temporal filter is used to get more accurate results. After that, an adaptive membership cost function is applied for obstacle estimation on the road. Experiment results show that our method achieves high stability in a variety of traffic environments.
The role of platelets in blood coagulation during thrombus formation in flow

Hemostatic plug covering the injury site (or a thrombus in the pathological case) is formed due to the complex interaction of aggregating platelets with biochemical reactions in plasma that participate in blood coagulation. The mechanisms that control clot growth and which lead to growth arrest are not yet completely understood. We model them with numerical simulations based on a hybrid DPD-PDE model. Dissipative particle dynamics (DPD) is used to model plasma flow with platelets while fibrin concentration is described by a simplified reaction-diffusion-convection equation. The model takes into account consecutive stages of clot growth. First, a platelet is weakly connected to the clot and after some time this connection becomes stronger due to other surface receptors involved in platelet adhesion. At the same time, the fibrin network is formed inside the clot. This becomes possible because flow does not penetrate the clot and cannot wash out the reactants participating in blood coagulation. Platelets covered by the fibrin network cannot attach new platelets. Modelling shows that the growth of a hemostatic plug can stop as a result of its exterior part being removed by the flow thus exposing its non-adhesive core to the flow.
A countermeasure for loss of situation awareness: Transitioning from the laboratory to the aircraft

Loss of situation awareness (SA) is a major contributor to aircraft mishaps. This paper describes a technological (display) countermeasure for loss of situation awareness in flight and considers its key remaining transition challenges. The display countermeasure is a tactile situation awareness system (TSAS) that provides cues concerning aircraft motion. For example, if a helicopter drifts upwards, forwards, or downwards away from its desired hover, the pilot would feel a vibrotactile pulse on top of his/her shoulders, the front of his/her torso, or beneath his/her buttocks, respectively. The key challenge remaining for the TSAS is to transition from the research laboratory science and technology (S&T) setting to routine use aboard manned aircraft, which requires extensive flight testing. We present research evidence supporting the utility of the cues provided by TSAS, the safety benefits of TSAS, and the robustness of TSAS under demanding conditions relevant to flight. However, the research setting differs greatly from the operational setting it serves. Therefore, we conclude by sharing seven practical technology transition lessons we have learned from our efforts to transition TSAS from S&T to the very different world of flight operations. We discuss how the differing procedures, standards, timelines, priorities, incentives, and expectations of scientific versus flight testing raise significant challenges to the efficient transition of new technological inventions to the aircraft. Our hope is that describing our ongoing efforts with TSAS will aid similar display technology transition efforts and provide inventors information that could foster government innovation and implementation.