Miracle-dz/UniFAR-FTUs huggingface dataset:
Coupling efficiency analysis of a gradient-index planar waveguide coupler based on ABCD matrix

This paper presented a gradient-index planar waveguide (GIPW) coupler for laser diode and single mode fiber (SMF), and numerically analyzed the coupling efficiency and alignment tolerance of the couplers based on ABCD matrix. First, the components of the coupler were introduced. The coupler comprises of a gradient-index planar waveguide and a self-focusing lens. An elliptical Gauss beam emitted from an LD have different spot sizes in different direction and has mass losses when coupling with SMF directly. A method was presented by this paper to convert the elliptical beam into a circular one by a kind of gradient-index planar waveguide, and then the circular Gauss beam could be couple in SMF with a high efficiency by using a 1/4 pitch self-focusing lens. Second, we formulated the ABCD matrix of the beam propagation between LD and SMF by tracing complex rays, and obtained the expressions for spot sizes and wave-front radii of Gauss beam. Then the model for calculating coupling efficiency of the coupler was set up by overlap integral. Finally, the coupling efficiency of that coupler was investigated numerically. The coupling loss characteristic and tolerance characteristics were analyzed, and the optimized parameters of the components were given. This technique should be useful for design and manufacture of the coupler.
Preparation and magnetic properties of cylindrical permalloy nanowire arrays

Cylindrical permalloy nanowire arrays are prepared by employing anodic aluminum oxide (AAO) template-assisted electrochemical deposition method. To prepare high-quality permalloy nanowire, the effects of different deposition parameters (pulse current density, concentration and pH value of the electrolyte, and deposition temperature) on the chemical composition, uniformity, and magnetic properties of the nanowires are systematically investigated. A high-quality permalloy nanowire with good magnetic properties of MS≈5.7×105A/m\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${M}_{\text{S}}\approx 5.7\times {10}^{5}\, \mathrm{A}/\mathrm{m}$$\end{document} and α≈0.04\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha \approx 0.04$$\end{document} has been successfully prepared by optimizing the preparation scheme, which can provide technical support for mass production of cylindrical permalloy nanowire for spintronic devices.
Innovating for supply chain integration within construction

The dream of better relationships among different supply chain partners; trust and transparency during different construction activities; integrated supply chain; completion of projects on time, within the agreed cost, with promised quality products and services, and so on, have now been achieved within the UK construction industry due to innovation within the project procurement processes and activities. There has also been a growing realisation that the promotion of innovative thinking, in procurement processes for supply chain integration, offers all the involved parties some key benefits in terms of more flexibility and adaptability, commercial growth, and improved quality of products, and delivered service. This paper highlights the benefits of, and the motivation towards innovative procurement through two case studies done as part of a supply chain integration project at the SCRI research centre. The case studies demonstrate how organizations involved have promoted innovative thinking across the supply chain through innovative procurement. The case studies also highlight some of the critical factors that motivated people within those firms to move from traditional way of procurement, and search, innovate, and implement the new procurement thoughts and models. The paper concludes that these studies offer transferable learning opportunities and motivation for the staff of other construction firms seeking to promote integration within their supply chains through innovative procurement routes.
Matched windows in circular waveguide

Design curves are presented for the matching of a dielectric window in circular waveguide propagating the dominant TE/sub 11/ mode. The matching is accomplished by thick or thin inductive irises which are in contact with the window on both sides. This configuration gives wide bandwidth and is mechanically convenient, but requires consideration of coupling of the higher-order modes generated by the closely spaced discontinuities. Mode matching and the generalized scattering matrix are utilized. >
Text Classification in Law Area: a Systematic Review

Automatic Text Classification represents a great improvement in law area workflow, mainly in the migration of physical to electronic lawsuits. A systematic review of studies on text classification in law area from January 2017 up to February 2020 was conducted. The search strategy identified 20 studies, that were analyzed and compared. The review investigates from research questions: what are the state-of-art language models, its application of text classification in English and Brazilian Portuguese datasets from legal area, if there are available language models trained on Brazilian Portuguese, and datasets in Brazilian law area. It concludes that there are applications of automatic text classification in Brazil, although there is a gap on the use of language models when compared with English language dataset studies, also the importance of language model in domain pre-training to improve results, as well as there are two studies making available Brazilian Portuguese language models, and one introducing a dataset in Brazilian law area.
Agent-Based Simulation Method of Complex System

In this paper a method is introduced to simulate the Complex system by ABMS . space system can be considered a complex system that is composed of many satellites ,which need a powerful and flexible method to study , MAS structure of space system is gived by analyzing its hiberarchy , by studying the navigation agent , a typical agent structure is gived . introduce the RepastHPC agent platform using MPI , orbit forecasting method is studying , Finally, we realize the MAS simulation and run it on parallel cluster .
Electron transport in AlGaN/GaN HEMT-like nanowires: Effect of depletion and UV excitation

In this work, we have investigated the features of electron transport in AlGaN/GaN transistor-like heterostructures with nanowires of different width. These nanostructures are studied extensively because of their great electronic and sensing advantages for electronic biosensor applications. We study the depletion effects and impact of ultraviolet excitation on the electron transport in sets of nanowires of different width from 1110 down to 185 nm. We have found significant difference in electrical characteristic’s behavior between wide (1110…480 nm) and narrow (280…185 nm) nanowires and have observed regions related to space-charge-limited transport for the narrowest nanowires. Also, we obtained evident dependence of nanowire’s current-voltage characteristics on the wavelength and energy of UV excitation. External UV excitation allows us to control the depletion widths in nanowires and effectively tune space-charge-limited transport.
A likely association of damselflies with the habitat heterogeneity provided by the freshwater swamp lily, Ottelia ovalifolia, in Eyre Peninsula granite rock-holes, with a review of potential threats to this ephemeral habitat

ABSTRACT The granite rock-holes (sometimes called gnammas) across northern Eyre Peninsula (EP), South Australia, are a unique but poorly studied ephemeral freshwater habitat containing a complex invertebrate community. Macroinvertebrate predator occurrence is often sporadic, both spatially and temporally. We aimed to determine if environmental conditions might predict predator occurrence in EP rock-holes. A total of 14 rock-holes were sampled across five granite outcrops along the Eyre Highway. Extensive dip-net sampling was undertaken and nymphs of three damselfly species were recorded from the rock-holes: Austrolestes annulosus (Lestidae), Ischnura aurora, and Xanthagrion erythroneurum (both Coenagrionidae), all in a single rock-hole at Pildappa Rock. This sole rock-hole contained a prominent floating-leaved, rooted aquatic macrophyte: the swamp lily, Ottelia ovalifolia (Hydrocharitaceae), which forms a complex, three-dimensional vegetative structure. Damselflies were hypothesised to be associated with the presence of O. ovalifolia, possibly as a result of the plant providing both suitable oviposition sites for the adults and habitat for nymphs throughout the water column, opportunities not afforded by the aquatic vegetation present in shallow rock-holes. Our findings contribute to the limited ecological information regarding EP rock-holes. We also briefly review potential threats to these ecosystems, an understanding of which will be critical to their management and conservation.
Effectiveness of GNSS Spoofing Countermeasure Based on Receiver CNR Measurements

A perceived emerging threat to GNSS receivers is posed by a spoofing transmitter that emulates authentic signals but with randomized code phase and Doppler over a small range. Such spoofing signals can result in large navigational solution errors that are passed onto the unsuspecting user with potentially dire consequences. In this paper, a simple and readily implementable processing rule based on CNR estimates of the correlation peaks of the despread GNSS signals is developed expressly for reducing the effectiveness of such a spoofer threat. Consequently, a comprehensive statistical analysis is given to evaluate the effectiveness of the proposed technique in various LOS and NLOS environments. It is demonstrated that the proposed receiver processing is highly effective in both line-of-sight and multipath propagation conditions.
A Review on Neural Network Models for Wind Speed Prediction

This paper presents review of neural network models for wind speed prediction during the past 15 years. Wind energy is one of renewable energy system with lowest cost of electricity production. The prediction of wind speed is recognized as a major contribution of wind farm. Wind speed prediction has many applications in Military, Air traffic control and Ship navigation etc. The prediction of wind speed depends on meteorological variables such as pressure, temperature, humidity and rainfall etc. The aim is to identify the importance, advantages and comparison of different neural network models of wind speed prediction. This review is to be useful for researchers working in this field and identify performance of neural network models. It is very helpful to the wind farm owners to understand the current wind prediction model capabilities and give an idea which model will be suitable for predicting the wind speed at their wind farms.
A Systematic Review of a Polyvagal Perspective on Embodied Contemplative Practices as Promoters of Cardiorespiratory Coupling and Traumatic Stress Recovery for PTSD and OCD: Research Methodologies and State of the Art

Baseline respiratory sinus arrhythmia (RSA) has been proposed as a transdiagnostic biomarker of stress vulnerability across psychopathologies, and a reliable association between PTSD, OCD and lower resting RSA was found. Contemplative practices have been linked to the activation of the vagus as well as to an increased RSA that, according to the polyvagal theory, reflects the activation of the ventral vagal complex (VVC) and may promote PTSD and OCD recovery. PubMed and Scopus databases were selected to conduct a search following the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) 2020 guidelines, and A MeaSurement Tool to Assess systematic Reviews-2 (AMSTAR-2) was used to appraise the methodological quality for this systematic review. Six articles met the inclusion criteria (one cross-sectional study, one study with pre-post measurements, two cohort studies and two RCT studies). Mindfulness-related interventions promoted parasympathetic activity, an increased vagal tone and improvements in PTSD and OCD symptoms. According to the polyvagal theory, mindfulness-related and compassion-related meditations would be conceptualized as neural exercises expanding the capacity of the ventral vagal complex to regulate the present state and to promote resilience. Clinical and methodological issues are discussed.
An improved negative zero vibration anti-swing control strategy for grab ship unloader based on elastic wire rope model

A dynamic model of swing system of bridge-type ship unloader is established by considering the elastic factor of wire rope in this paper. Based on this model, an improved Negative Zero Vibration (NZV) shaper with optimal control parameters of variable rope length system is proposed to restrain the swing of grab. Then the control effects, influence of elasticity factor and parameter sensitivities are analyzed based on numerical simulation. The results show that the proposed control strategy can reduce the working cycle time of the grab ship unloader about 11% when considering the elastic factor of the wire rope, and the grab's maximum residual swing angle decreases by 67% when discharging at full load, and decreases by 79% when taking the cargos at empty load. This implies that the improved NZV control method provides better swing angle control performance and shorter operation time compared with the Zero Vibration (ZV) and Zero Vibration and Derivative (ZVD) methods. Moreover, elastic rope model can improve the swing angle control effect of grab based on the proposed control strategy compared with rigid rope model. The parameter sensitivity analysis displays that the grab's maximum residual swing angle by using the improved NZV method is sensitive to the change of the grab's center of gravity, and this angle is more sensitive to the wire rope diameter deviation compared with the elastic modulus deviation.
Slot-coupled broadband patch antenna

A wideband aperture-coupled patch antenna is presented. The proposed antenna consists of patches in different sizes and a ground plane, which is fed by a microstrip line through a slot cut on the plane ground. Owing to the patches of different size and the slot on the ground, three resonance modes are excited simultaneously for the radiation at the boresight. The proposed antenna yields a wide bandwidth of about 31% with a low profile of 0.07 λ 0 ( λ 0 is the free space wavelength at the centre operating frequency). The results are validated by both numerical simulation and experimental measurements.
Policy Representation Learning for Multiobjective Reservoir Policy Design With Different Objective Dynamics

Most water reservoir operators make use of forecasts to inform their decisions and enhance water systems flexibility and resilience by anticipating hydrological extremes. Yet, despite numerous candidate hydro‐meteorological variables and forecast horizons may potentially be beneficial to operations, the best information set for a given problem is often not evident. Additionally, in multipurpose systems characterized by multiple demands with varying vulnerabilities and temporal scales, this information set might change according to the objective tradeoff. In this work, we contribute a novel method to learn the optimal policy representation (i.e., policy input set) by combining a feature selection routine with a multiobjective Direct Policy Search framework in order to retrieve the best policy input set online (i.e., while learning the policy) and dynamically with the objective trade‐off. The selected policy search routine is the Neuro‐Evolutionary Multi‐Objective Direct Policy Search (NEMODPS) which generates flexible policy shapes adaptive to online changes in the input set. This approach is demonstrated on the case study of Lake Como (Italy), where the operating objectives are highly heterogeneous in their dynamics (fast and slow) and vulnerabilities (wet and dry extremes). We show how varying objectives, and tradeoffs therein, benefit from a different policy representation, ultimately yielding remarkable results in terms of conflict mitigation between different users. More informed policies, moreover, show higher robustness when re‐evaluated across a suite of different hydrological conditions.
The art and science of live, virtual, and constructive simulation for test and analysis

Live, virtual, and constructive (LVC) simulation technologies are well-established in the areas of technology demonstration, mission rehearsal, and exercises. A promising new role for LVC simulation technology is to facilitate weapon systems testing by producing defendable results. Requirements to test new defense systems within a system-of-systems context and within joint force scenarios have placed demands on physical test ranges that are not likely to be met. The LVC testing option promises the breadth and depth of defense systems, either as real or simulated assets, to potentially meet the new test demands. However, leveraging this technology to support testing will require a shift in the approaches used by the LVC community. In this paper, we discuss the challenges facing the LVC testing initiative, both from an experimental and from an architectural and implementation standpoint.
High Frequency Ultrasonic Wave Propagation in 
Anisotropic Materials

The influence of highly regular, anisotropic, microstructured materials on high frequency ultrasonic wave propagation was investigated in this work. Microstructure, often only treated as a source of scattering, significantly influences high frequency ultrasonic waves, resulting in unexpected guided wave modes. Tissues, such as skin or muscle, are treated as homogeneous by current medical ultrasound systems, but actually consist of highly anisotropic micron-sized fibres. As these systems increase towards 100 MHz, these fibres will significantly influence propagating waves leading to guided wave modes. The effect of these modes on image quality must be considered. However, before studies can be undertaken on fibrous tissues, wave propagation in more ideal structures must be first understood. After the construction of a suitable high frequency ultrasound experimental system, finite element modelling and experimental characterisation of high frequency (20-200 MHz) ultrasonic waves in ideal, collinear, nanostructured alumina was carried out. These results revealed interesting waveguiding phenomena, and also identified the potential and significant advantages of using a microstructured material as an alternative acoustic matching layer in ultrasonic transducer design. Tailorable acoustic impedances were achieved from 4-17 MRayl, covering the impedance range of 7-12 MRayl most commonly required by transducer matching layers. Attenuation coefficients as low as 3.5 dBmm-1 were measured at 100 MHz, which is excellent when compared with 500 dBmm-1 that was measured for a state of the art loaded epoxy matching layer at the same frequency. Reception of ultrasound without the restriction of critical angles was also achieved, and no dispersion was observed in these structures (unlike current matching layers) until at least 200 MHz. In addition, to make a significant step forward towards high frequency tissue characterisation, novel microstructured poly(vinyl alcohol) tissue-mimicking phantoms were also developed. These phantoms possessed acoustic and microstructural properties representative of fibrous tissues, much more realistic than currently used homogeneous phantoms. The attenuation coefficient measured along the direction of PVA alignment in an example phantom was 8 dBmm-1 at 30 MHz, in excellent agreement with healthy human myocardium. This method will allow the fabrication of more realistic and repeatable phantoms for future high frequency tissue characterisation studies.
Numerical simulation of flood control and drainage and water environment improvement project in Shangyu

In recent years, the domestic waterlogging disasters occurred frequently in many cities, and the water environment problems were prominent, which have seriously affected the normal production and life, and it caused great economic losses. Shangyu was the research object, shangyu had established a two-dimensional hydrodynamic water quality mathematical model of East Zhejiang water diversion project, and the model was verified by the measured data. Furthermore, the influence of different diversion schemes on water quality indexes such as hydrodynamic, BOD and Do. and the engineering measures optimized new drainage sluice and connection project. After adding drainage sluice between Dongjin sluice and No.2 sluice, the flow velocity of Shangyu river network increased by 10% - 20%, and the water level decreased significantly; Through the diversion tunnel, the flow velocity of Zaoli Lake, Baima Lake, Dongpo Lake and Xipo Lake was increased by 258.9%, and water quality reached the standard, it was shortened from 15 hours to 10 hours, and the final pollutant concentration can be reduced to 2mg/L, which meets the class I water quality standard. This shows that the newly flood gate and connection project will greatly improve the flood control and drainage capacity of Shangyu District, then effectively improve the regional water environment, it has a good significance for alleviating the pressure of urban waterlogging and enhancing the capacity of urban regional development.
Quiet Tunnel Measurements of HIFiRE-5 Boundary-Layer Transition

The Hypersonic International Flight Research Experimentation (HIFiRE) program is a hypersonic flight test program executed by the Air Force Research Laboratory and Australian Defence Science and Technology Organisation. The principal goal of HIFiRE flight five is to measure hypersonic boundary-layer transition on a three-dimensional body. The HIFiRE flight tests are supported by a ground test campaign; this paper presents measurements of heat flux and boundary-layer transition in the Boeing/AFOSR Mach-6 Quiet Tunnel. This facility has been developed to provide quiet flow at high Reynolds number, with low noise levels comparable to flight. This tunnel’s good optical access enabled global measurement of the heat flux by means of temperature-sensitive paint. Two modes of transition were observed: transition along the centerline, suspected to arise from the amplification of second-mode waves in the boundary layer, and transition roughly halfway between the centerline and leading edges, probably due to the bre.
Building Pathology, Investigation of Sick Buildings — VOC Emissions

The design and management of the indoor environments of buildings should foster ‘‘health and wellbeing’’. Buildings affect the health of occupants in many ways, for example, through building related illnesses, sick building syndrome and allergy, and environmental health problems. The principal causes of sick buildings in the majority of cases are related to microbial effects and emissions of volatile organic compounds (VOCs) and formaldehyde from building materials or products used in buildings. Lighting and inadequate ventilation, particularly in airtight buildings are also important factors. New and refurbished buildings where there has been inappropriate use of materials could lead to high indoor concentrations of VOCs and formaldehyde, odours, and adverse effects on occupants. Indoor air quality management and investigation of sick buildings are complex issues, requiring multidisciplinary investigations and environmental monitoring. This paper considers the requirements for investigation of sick buildings with a particular focus on emissions of VOCs and formaldehyde in indoor environments, including examples of the causes and odour effects. Some guidelines for assessment of exposure risks are also included.