Miracle-dz/UniFAR-FTUs huggingface dataset:
Numerical Simulation of Inverted Pavement Systems

Conventional pavements rely on stiff upper layers to spread traffic loads onto less rigid lower layers. In contrast, an inverted pavement system consists of an unbound aggregate base compacted on top of a stiff cement-treated base and covered by a relatively thin asphalt concrete layer. The unbound aggregate interlayer in an inverted pavement experiences high cyclic stresses that incite its inherently nonlinear granular media behavior. A physically sound, nonlinear elastoplastic material model is selected to capture the unbound granular base in a finite-element simulator developed to analyze the performance of inverted pavement structures. The simulation results show that an inverted pavement can deliver superior rutting resistance, as compared with a conventional flexible pavement structure with similar fatigue life.
Safe Multirobot Navigation Within Dynamics Constraints In fast robot soccer games, teams play without any human input, avoiding collisions and obstacles and coordinating action to implement team strategy and tactics.

This paper introduces a refinement of the classical sense-plan-act objective maximization method for setting agent goals, a real-time randomized path planner, a bounded accelerationmotioncontrol system, and a randomized velocity- space search for collision avoidance of multiple moving ro- botic agents. We have found this approach to work well for dynamic and unpredictable domains requiring real-time re- sponse and flexible coordination of multiple agents. First, the approach employs randomized search for objective maximi- zation and motion planning, allowing real-time or any-time performance. Next, a novel cooperative safety algorithm is employed which respects agent dynamics limitations while also preventing collisions with static obstacles or other partici- pating agents. An implementation of our multilayer approach has been tested and validated on real robots, forming the basis for an autonomous robotic soccer team.
Trailing-Edge Airframe Noise Source Studies on Aircraft Wings

Interaction between unsteady surface flow and wing trailing edges is considered one of the dominant source mechanisms of airframe noise. For the prediction of trailing-edge noise radiation, detailed information on the unsteady-flow behavior close to and at the edge is essential. Therefore, surface pressure measurements were conducted near the wing/flap trailing edge of a business jet aircraft (HFB-320) and a large commercial aircraft (DC-10/30) under realistic flight conditions within a wide range of flight speeds and typical flap deflection angles. The spectral distribution of pressure intensities and coherences were determined and compared to corresponding results from model and glider measurements, respectively. On the basis of integral pressure field coherence dimensions (deduced from measured data), the applicability of the hydrodynamic trailing-edge noise model is evaluated.
Novel zero-voltage and zero-current-switching (ZVZCS) full-bridge PWM converter using coupled output inductor

A novel zero voltage and zero current switching (ZVZCS) full bridge (FB) PWM converter is proposed. The new converter improves the drawbacks of the previously proposed ZVZCS FB PWM converters. A simple auxiliary circuit with neither lossy components nor active switches achieves ZVZCS of the primary switches. Since the proposed converter has many advantages such as simple auxiliary circuit, high efficiency, low voltage stress of the rectifier diode and self-adjustment of the circulating current, it is very attractive for the high power applications. The principles of operation and design considerations are presented. The experimental verifications from 4 kW prototype converter operating at 80 kHz are presented.
Wideband single layer microstrip antenna for array applications

A wideband single layer microstrip antenna, fed by two different networks, is presented. A bandwidth of /spl sim/15% for SWR<2 is obtained. As its dimensions are the same as those of a conventional 2/spl times/2 sub-array, this radiating element can be used in array configuration.
Inventory of Microorganisms with a documented history of use in food

In order to classify traditionally used microorganisms (starter cultures) as safe food ingredients, The IDF in collaboration with EFFCA (European Food and Fed Cultures Association) has compiled an inventory of microorganisms with a documented history of use in food. The inventory is supplied with explanatory text dealing with taxonomic changes that have taken place over time. The use of the microorganisms is documented by sales information and through literature references. The inventory is by no means exhaustive, and is based on the knowledge of the participating experts, not that of the whole food or dairy industry. This inventory is intended for information only, not as a complete inventory of microorganisms for use in food, or to exclude any other existing products unknown to the participating experts. The list mentions major applications for the included culture or strain. This information is taken from the literature and it does not imply that the strain or culture could not be applied in the production of other foodstuffs.
Biography of an ERP: Tracing the fabrication of a virtual object

This paper provides an account of the way Enterprise Resource Planning (ERP) systems change over time. These changes are conceptualised as a biographical accumulation that gives the specific ERP technology its present character, attributes and historicity. The paper presents empirics from the implementation of an ERP package within a single Australasian organisation. Changes to the ERP take place as a result of imperatives which arise during the implementation. Our research and evidence then extends to a different time and place where the new release of the ERP software was being ‘sold’ to client firms in the UK. We theorise our research through a lens based on ideas from ANT (actor network theory) and the concept of biography. The paper seeks to contribute an additional theorization for ANT studies that places the focus on the technological object and frees it from the ties of the implementation setting. We contrast this approach with Dechow and Mouritsen’s (2005) path dependency. The research illustrates the opportunistic and contested fabrication of a technological object and emphasizes the stability as well as the fluidity of its techno-logic.
Shor t Paper: Hierarchical Underwater Acoustic Sensor Networks

We propose a hierarchical underwater acoustic sensor network architecture in which the sensors and the collector stations operate in distinct layers. The hierarchical architecture is motivated by the property of the acoustic underwater transmission medium that for each transmission distance there exists an operating frequency for which the narrowband signal-to-noise ratio is maximized. The sensors and collector stations are consequently allocated different operating frequencies. We assume a uniform distribution of both sensors and collector stations over the finite area of the sensing field. The node-to-node channel is modeled using frequency dependent path loss and Ricean fading. We adopt a communication theoretic approach and study the interdependence of the sustainable number of hops through the network, end-to-end frame error probability, power and bandwidth allocation. The analysis is performed under the assumption that there is interference from other nodes within the same layer of the hierarchy. We present numerical examples that illustrate the network performance and demonstrate that there are preferred operating frequencies which ensure network operation without any cross-interference between the collector network and the sensor network.
Development of a photovoltaic array model for use in power-electronics simulation studies

To be able to develop a complete solar photovoltaic power electronic conversion system in simulation, it is necessary to define a circuit-based simulation model for a PV cell in order to allow the interaction between a proposed power converter (with its associated control arrangement) and the PV array to be studied. To do this, it is necessary to approach the modelling process from the perspective of power electronics; that is to define the desired overall model in terms of the manner in which the electrical behaviour of the cell changes with respect to the environmental parameters of temperature and irradiance. The authors cover the development of a general model which can be implemented on simulation platforms such as PSPICE or SABER and is designed to be of use to power electronics specialists. The model accepts irradiance and temperature as variable parameters and outputs the I/V characteristic for that particular cell for the above conditions.
Human Factors Goes to the Gridiron

RMCHAIR QUARTERBACKS don't usually have to prove themselves, but we did. We made the mistake of saying to a college football coach that we couldn't understand how quarterbacks could make so many wrong decisions when choosing their receiver. We assumed that after long hours of practice and years of experience, quarterbacks would have highly developed skills in recognizing the open receiver. A long and painful educational process followed. The coach eXplained that quarterbacks have few opportunities to train on the visual task that faces them each week during the game. We had assumed that each quarterback had thousands of training trials; the
Survey on Effects of Black Hole Attacks in Mobile Ad hoc Networks

Black hole attack this is one of the known security threats/issues in Mobile Ad hoc Networks. The malicious node uses the loophole to carry out their malicious behaviours due to necessity of route discovery process in Mobile Ad hoc Networks Many researches have been conducted using different detection techniques to propose so many types of detection schemes. In this paper, we survey the existing solutions at hand and discuss the state-of-the-art routing methods. We intend to classify these proposals into single black hole attack and collaborative black hole at- tack and also analyse the categories of these solutions and provide a comparison table.
XII. A method of examining refractive and dispersive powers, by prismatic reflection

In examining the power with which various substances refract and disperse light, I have for some time past employed a method unnoticed by writers on optical subjects; and, as it is not only convenient in common cases of refraction, but also capable of affording results not attainable by other means, I have been induced to draw up a short account of the method itself, and of the most remarkable instances of its application. This method was suggested by a consideration of Sir Isaac Newton’s prismatic eye-glass, the principle of which depends on the reflection of light at the inner surface of a dense refracting medium.
Applying characteristic mode analysis to systematically design of 5G logarithmic spiral MIMO patch antenna

The Theory of Characteristic Modes (TCM) provides a natural and systematic approach for designing Multiple-Input Multiple-Output (MIMO) antennas with high efficiency and uncorrelated antenna patterns. Recent progress in the growing field of MIMO antenna design, supported by TCM, is examined in this study. The challenge of designing MIMO antennas for 5G wireless communications is in particular highlighted. The results demonstrate that the characteristic modes play a key role in establishing the optimal positioning of antennas for optimal efficiency. Therefore, in this article, this theory is applied to a novel design of a logarithmic spiral patch antenna (LSPA) that is used to obtain a circular polarization with good performance more easily than the traditional shapes. The systematic design process starts by designing a single element with one logarithmic spiral arm and passing through adding another arm of this single element, also passing through a two-element array antenna, and ending in four configurations of two-port MIMO and selecting the configuration with best performance. The best configuration of the proposed MIMO provides a wide -10 dB measured impedance ranging from 27.3 GHz to 30.2 GHz covering the whole frequency band allocated for 5G communication systems with acceptable performance such as large bandwidth, high gain, high isolation, low envelope correlation coefficient, and low channel capacity loss. The isolation achieved for the operating bandwidth is better than -36 dB, demonstrating low mutual coupling. Moreover, the peak gain and total efficiency obtained are 9.9 dBi and 94%, respectively over the whole operating bandwidth. The proposed design is designed, analyzed, and simulated in the 3D electromagnetic full-wave software Computer Simulation Technology (CST). The design is fabricated using the photo-lithographic method and measured using R&SZNA67 vector network analyzer. The prototype achieved is extremely similar to the expected performance and consequently proves that the offered characteristics mode analysis method is applicable.
Dynamic analysis of an inventory and order based production control system

Abstract In an inventory and order based production control system (IOBPCS), there are three fundamental system parameters. One of these, the production delay time, is beyond the control of the IOBPCS designer. Indeed, the production delay may be highly variable with time due to a variety of problems commonly found in manufacturing industry. This uncertainty must be countered by the proper use of a feedback loop which detects and operates on inventory deviations. The IOBPCS designer is thus left with the forward path demand averaging time and feedback path gain to adjust, as best he can. This paper studies the ability of the IOBPCS to recover from shock demands, and to protect the manufacturing process from random variations in consumption. It is shown that the feedback path is of fundamental importance in good control, and that adequate performance cannot be obtained by feedforward alone. Dynamic recovery is examined graphically by separately identifying the feedforward and feedback components. Random di.
Instantaneous active and reactive current control technique of shunt active power filter based on the three-level NPC inverter

In this paper, the synthesis and performance of a shunt active power filter (SAPF) based on instantaneous active, and reactive current components (i-d i-q) technique is presented. The proposed active filter acts as a current source, which is connected in parallel with a nonlinear load and controlled to generate the required compensation currents. The proposed control technique for SAPF aims to compensate the harmonic current contents of nonlinear loads by connection of distributed generation (DG) resources based on renewable energy sources to distribution network. This modeling is derived from the 123(abc)to αβ and αβ to dq transformation of the ac system variables. The injected currents by the SAPF to polluted grid are controlled in synchronous orthogonal dq reference frame by using of decoupled current control technique. By use of phase locked loop (PLL) in control circuit of proposed technique, the angle of positive sequence has been detected, in order to synchronize the SAPF injected currents to distribution network. The proposed control strategy has this ability to eliminate wide range of harmonic frequency draws from utility grid, and provide the compensation currents by DG resources. By this control method, replacement of distributed power generation systems as an active power filter can be possible. Three-phase three-level neutral-point-clamped (NPC) voltage source inverter (VSI) is proposed for the interfacing between renewable energy resources and polluted distribution network. The simulation results demonstrate high performances of proposed SAPF technique.
Architecture of solution for panoramic image blurring in GIS project application

Abstract. Panoramic images captured using laser scanning technologies, which principally produce point clouds, are readily applicable in colorization of point cloud, detailed visual inspection, road defect detection, spatial entities extraction, diverse map creation, etc. This paper underlines the importance of images in modern surveying technologies and different GIS projects at the same time having regard to their anonymization in accordance with law. The General Data Protection Regulation (GDPR) is a legal framework that sets guidelines for the collection and processing of personal information from individuals who live in the European Union (EU). Namely, it is a legislative requirement that faces of persons and license plates of vehicles in the collected data are blurred. The objective of this paper is to present a novel architecture of the solution for a particular object blurring. The architecture is designed as a pipeline of object detection algorithms that progressively narrows the search space until it detects the objects to be blurred. The methodology was tested on four data sets counting 5000, 10 000, 15 000 and 20 000 panoramic images. The percentage of accuracy, i.e., successfully detected and blurred objects of interest, was higher than 97 % for each data set. Additionally, our aim was to achieve efficiency and broad use.
Motion Perception Thresholds in Flight Simulation

Pilot perception models include detailed descriptions of the sensory dynamics involved in human spatial orientation. For example, the TNO Spatial Orientation model contains transfer functions of the visual and vestibular system (semicircular canals and otoliths). In our previous attempts to apply this model for the validation of simulator motion cues, we realized that the model did not yet account for perception thresholds. This means that any non-zero motion input to the model yields a non-zero output, assuming that the motion input falls within the sensors operational frequency range. Hence, the model did not adequately predict the effect of sub-threshold motion stimuli, or possible interactions between multiple stimuli near threshold level (e.g., visual-inertial). This paper provides a brief overview of motion perception thresholds found in the literature and from obtained in previous simulator studies. We will present psychophysical data showing how the combination of visual and inertial cues affects the perception threshold involved. The results suggest that a visual stimulus leads to an increased detection threshold for a concurrent inertial stimulus, without affecting the underlying transfer function of the vestibular sensors. This finding is the basis for a newly developed threshold model, which lays a general scheme for the modeling of sensory thresholds.
Effect of forecast errors on rolling horizon master production schedule cost performance for various replanning intervals

Master production schedules are usually updated by the use of a rolling schedule. Previous studies on rolling schedules seem to form the consensus that frequent replanning of a master production schedule (MPS) can increase costs and schedule instability. Building on previous research on rolling schedules, this study addresses the impact of overestimation or underestimation of demand on the rolling horizon MPS cost performance for various replanning frequencies. The MPS model developed in this paper is based on actual data collected from a paint company. Results indicate that under both the forecast errors conditions investigated in this study, a two-replanning interval provided the best MPS cost performance for this company environment. However, results from the sensitivity analysis performed on the MPS model indicate that when the setup and inventory carrying costs are high, a 1-month replanning frequency (frequent replanning) seems more appropriate for both of the above forecast error scenarios.
Challenges Faced by SMEs in Developing Countries in Implementing Cleaner Production (CP)

Cleaner production (CP) has been widely recognized as a useful approach to mitigate pollutions during industrial production. Small-to Medium-Scale Enterprises (SMEs) contribute immensely to most developing economies and provide a vital source of employment and incomes for many millions of people in developing countries, but there is often disregard for the negative implications on the environment. The aim of the study was to assess barriers to cleaner production implementation in the small scale industries and recommend ways of addressing these. The research focuses upon some of the key environmental issues in the Zimbabwean small-to medium scale industry. An application of CP to two industries, namely the foundry and cement manufacturing industry is highlighted and the challenges faced during the implementation are discussed. A review of literature is also carried out to relate the challenges to other countries in order to have a global view and ascertain common inter-phases and the possibility of common solutions in the developing world. It was discovered that in the absence of external motivators, such as government regulation and community pressure, SMEs are less likely to adopt rapid advances in environmental performance. Lack of information also impacts negatively on efforts to inculcate a culture of environmental conscious manufacturing. There is a great need to actively inform the SMEs enterprises on the merits and demerits of not employing environmentally friendly methods of production. The other big barrier is the lack of expertise to champion the implementation of a companywide CP programme. Changes in systems and technology may also make certain employees obsolete, and therefore induce organisational structural protection of the existing system.
Millimeter‐wave coplanar waveguide series stubs on BCB and low resistivity silicon

30–225 GHz coplanar waveguide (CPW) series stubs are studied in a benzocylobutene and 10‐Ω‐cm silicon stack. Truncated side grounds improve the rejection of a 230 GHz CPW band pass filter (BPF). Silicon shielding using a grounded CPW line provides 1.79 dB insertion loss for a 215 GHz BPF. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:375–380, 2014
High-performance current regulation and efficient PWM implementation for low-inductance servo motors

This paper reports on a standard microcontroller implementation of a pulsewidth modulator and near-deadbeat current regulator for high switching frequency. The application is in high-performance positioning systems. The control strategy relies on a simplified machine model without incurring performance degradations. Changes between different modulation strategies are programmed depending on the modulation index. The values of switching time durations are obtained exclusively by decision making, thus minimizing computational load. Features like over-modulation (OVM), dynamic OVM, anti-windup, and reduction of switching frequency at thermal overload are included.