Miracle-dz/UniFAR-FTUs huggingface dataset:
CPW-fed printed UWB antenna with open-loop inverted triangular-shaped slot for WLAN band filtering

A compact CPW-fed printed monopole slot antenna is presented for ultra-wideband (UWB) applications. The antenna comprises of a dome-shaped radiating element in which embedded is an open-loop inverted triangular-shaped slot (TSS). The antenna is fed through a coplanar waveguide to provide an ultra-wide impedance bandwidth of 8.95 GHz (2.58–11.53 GHz) which corresponds to a bandwidth ratio of 1:4.46 for VSWR <2. The antenna possesses a notch band functionality to filter out interfering C-band signals like wireless local-area network (WLAN). The notch band frequency is determined by physical parameters defining the TSS that allows fine control of the notch's location. The proposed antenna also possesses a flat gain response expect at the notched band and occupies a relatively small volume of 25 × 25 × 0.8 mm3 for ease of system integration.
Material Property Characterisation Method Using Vibro-Acoustic Signals

Material play an important role in engineering design and the characterisation of material property has become an essential requirement for their successful application as structural elements. In this paper, the development of material property characterisation method has been presented. Impulsive excitation test has been performed on rectangular bars (medium carbon steel S50C, cast iron FCD 500, stainless steel AISI 304and brass). The transient vibro-acoustic signals generated during the excitation test have been captured using data acquisition system consist of accelerometer-microphone combination. A new method for reducing the noise components from the recorded signals is introduced by an extensive process of a new Z-stem filtering technique. The filtered signals have been analysed using an alternative statistical method known as Integrated Kurtosis-based Algorithm for Z-notch filter (I-kazTM) to determine the pattern of the signal and to estimate the significance differences among those materials. The representation of the experimental curves obtained by the determination of I-kaz coefficient, Z∞ for various impact forces and materials revealed that the results are statistically significant and can be successfully used for determining the correlation between the curves and material property. Implications of this research to material property characterisation will be discussed.
Breakdown voltage reliability improvement in gas-discharge tube surge protectors employing graphite field emitters

Gas-discharge tube (GDT) surge protectors are known for many decades as passive units used in low-voltage telecom networks for protection of electrical components from transient over-voltages (discharging) such as lightning. Unreliability of the mean turn-on DC breakdown voltage and the run-to-run variability has been overcome successfully in the past by adding, for example, a radioactive source inside the tube. Radioisotopes provide a constant low level of free electrons, which trigger the breakdown. In the last decades, any concept using environmentally harmful compounds is not acceptable anymore and new solutions were searched. In our application, a cold field electron emitter source is used as the trigger for the gas discharge but with no activating compound on the two main electrodes. The patent literature describes in details the implementation of the so-called trigger wires (auxiliary electrodes) made of graphite, placed in between the two main electrodes, but no physical explanation has been given.
Air-Ground Communications: History and Expectations

The development of civil and related military air-ground communications in the United States is traced from its beginning in the late 1920's to the present time. The alternative methods of information exchange between the ground and aircraft, radar beacon transponders, and digital communications are reviewed from their conceptual identification to their current state of development. An estimate is made of the probability of implementation of the discrete address beacon system (DABS) and the RTCA endorsed universal data link.
Developments in retrodirective array technology

There has been significant interest in retrodirective antennas, especially considering the wealth of applications that could be significantly enhanced, or created, by the use of such technology. There is enormous potential for retrodirective antennas where complicated automatic tracking systems would benefit from being replaced by much simpler systems. Retrodirective array technology offers one solution pathway since it can offer extremely fast tracking with relatively simple circuitry. Retrodirective or self-steering arrays are suited for low radio frequency (RF) power mobile terminal use particularly on or between un-stabilised vehicles. In this type of operational scenario, high degrees of relative movement are expected, and power consumption and weight of the antenna must be kept to a minimum. In this study, the authors give a brief historical review of basic retrodirective technology and elaborate on some recent developments at Queens University of Belfast associated with retrodirective antenna technology in relation to, two-way communications, ultrafast RADAR, microwave imaging, spatial power transmission, mitigation of multipath effects and spatial encryption.
Numerical Study of the Blood Flow in a Deformable Human Aorta

In this work, we present a numerical investigation of blood flow in a portion of the human vascular system. More precisely, the present work analyzed the blood flow in the upper portion of the aorta. The aorta and its ramified blood vessels are surrounded by the cardiac muscle. The blood flow generates pressure on the internal surfaces of the artery and its ramifications, thereby causing deformation of the cardiac muscle. The numerical analysis used the Navier–Stokes equations as the governing equations of blood flow for the calculation of the velocity field and pressure distribution in the blood. The neo-Hookean hyperelastic model was used for the description of the behavior of the vessel walls. The velocity and pressure distributions were analyzed. The deformation of the vessel was also investigated. The numerical results could be used to better understand and predict the factors that trigger cardiovascular diseases and distortions of the aorta and as a diagnostic tool in clinical applications.
Radiation efficiency enhancement using lumped inductors for dual‐mode mobile phone

This letter proposes a radiation efficiency enhancement technique using a lumped inductor for a dual‐mode mobile phone.Two planar inverted‐F antennas (PIFAs) with a collinear arrangement are used for dual‐mode operation at the CDMA band of 824–894 MHz and GSM band of 880–960 MHz. Each antenna is separately connected to a lumped inductor of 4.7 nH. The electric field is more confined on each inverted‐F section at its operating band in this configuration and the coupling between PIFAs is less than −10 dB. The simulated and measured results show that radiation efficiency of the proposed antenna is improved by up to 33%. The radiation patterns are similar to those of a dipole antenna with slightly tilted main beam directions due to the PIFA placement. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1011–1013, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26735
Soil Moisture Prediction for Huaihe River Basin Using Hydrological Model XXT and TOPMODEL

Soil moisture plays an important role in agricultural drought predicting. Hydrological models can be employed to forecast soil moisture. In order to get better predicted soil moisture information, we use two basin hydrological models, i.e. XXT and TOPMODEL, to forecast the soil moisture for Huaihe River watershed. The performance of both the two models was tested in the Linyi watershed with a drainage area of 10040 km2, a tributary of the Huaihe river, China. The results show that the soil moisture simulated by the XXT is more agree with the observed ones than that simulated by TOPMODE compared to the filed observed soil moisture at 10 cm or the mean ones of 10 cm, 20 com, and 40 cm from surface, and that the predicted soil moisture by both the models has the similar trend and temporal change pattern with the observed one. However, both the models need to be improved in soil moisture forecasting in the future work.
A global knowledge transfer network: the case of Toyota's global production support system

In this paper, we discuss global knowledge transfer networks by examining Toyota's global production support system. We focus on three parts of Toyota's system: the mother plant, the operations management consulting division (OMCD) (seisan chosa shitsu), and the global production centre (GPC). The mother plant supports the production of foreign plants. The OMCD has a role in maintaining, diffusing, and providing education about the Toyota Production System (TPS), at both foreign and domestic sites. The GPC develops tools for training both foreign and domestic human resources. This paper argues that these systems work as a knowledge transfer network. We indicate that multiple organisational units can cooperate for effective knowledge transfer.
Is Design Education Preparing Product Designers for the Real World? A Study of Product Design Graduates in Ireland

ABSTRACT This study aims to identify professional product design roles. It presents the results of a survey of 251 graduates from undergraduate product design courses. Data was gathered about graduate's job descriptions; the companies that employ product designers and the postgraduate education taken. The objective was to show how design practice has evolved and the effect that this has had on product design as a discipline. The results highlight the crossover between design disciplines, the integration of product designers across different industries and the variety of roles that product designers undertake. Implications for product design education are discussed and recommendations are presented.
Effect of Some Feed Additives on In Vitro Rumen Digestibility

Researchers have recently focused on studies involving the improvement of feeds and their digestibility using different feed additives. These studies include feed additives such as probiotics, prebiotics, enzymes, organic acids, and phytobiotics. Feed additives added to feeds at appropriate levels increase the amount and quality of animal products, digestibility of feeds, feed consumption, and feed utilization. Various methods have been developed to determine digestibility, which is one of the determinants of the quality of feeds, accurately and reliably. Since chemical analyses do not reveal the actual value of feed or feed additives, various digestive experiments such as in vivo, in situ, and in vitro digestibility have been developed and used. In vivo experiments are reliable, but they have disadvantages of being cumbersome and expensive. Consequently, in vitro experiments have been preferred more recently due to easier execution in a short time span at cheaper costs, lesser requirement of feed material, and controlled experimental conditions. This review is aimed to highlight the available information regarding the use of feed additives in in vitro rumen digestion experiments. Ruminant.
A New Efficient Scheme for Frequency Control in an Isolated Power System with a Wind Generator

Abstract Stable operation of a power system is indebted to establishing and maintaining instance balancing between power generation and consumption and, hence, successful control of the system frequency. The fluctuating nature of the wind power can pose considerable problems for the frequency control. This article proposes an efficient control scheme in handling the frequency of an isolated power system with a high wind penetration level, while the wind speed and the load are changed. The frequency can be managed by several methods, including blade pitch angle regulation of the wind turbine and dump load and energy storage systems, such as the flywheel energy storage system. However, the dump load dissipates the power and causes the efficiency of the whole system to degrade. In order to cope with this defection, a coordinator unit has been designed to enhance joint operation of the pitch angle regulation and the dump load. Since an energy storage device, depending on its capacity, can play an effective role in keeping the system frequency in a range of interest, a flywheel energy storage system is added. Simulation results obtained under various operating conditions are presented to evaluate the effectiveness of the control scheme performance when the isolated system is equipped with a flywheel energy storage system.
Circularly polarized omnidirectional millimeter wave monopole with parasitic strip elements

A circularly polarized omnidirectional millimeter wave monopole with parasitic strip elements for a system of arrival signal direction detection in millimeter band is presented. As a consequence of the radiation pattern requirements, the proposed antenna consists of a conical skirt monopole with a polarizer radome. The polarizer converts a wave from linear to circular polarization. The proposed antenna has the advantage to be robust, low cost, and easy to fabricate with conventional materials and printed circuit technology. The study presents simulation and experimental results obtained with an antenna prototype that validate the design. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 664–668, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22237
Accurate and real-time human action recognition based on 3D skeleton

In this paper, we propose a real-time action recognition algorithm, based on 3D human skeleton positions provided by the depth camera. Our contributions are threefold. First, considering that skeleton positions in different actions at different time are similar, we adopt the Naive-Bayes-Nearest-Neighbor (NBNN) method for classification. Second, to avoid different but similar actions which would decrease recognition rate obviously, we present a hierarchical model and increase the recognition rate significantly. Third, for a real-time application, we apply the sliding window to buffer the input and the threshold presented by the ratio of the second nearest distance and the nearest distance to smooth the output. Our method also rejects undefined actions. Experimental results on the Microsoft Research Action3D dataset demonstrate that our algorithm outperforms other state-of-the-art methods both in recognition rate and computing speed. Our algorithm increases the recognition rate by about 10% at the speed of 30fps averagely (with resolution 640×480).
Integrating head-mounted displays into a cockpit

Modern cockpits are some of the most complex systems developed by man. Even relatively simple cockpits require the thoughtful integration of numerous subsystems: structure, controls, avionics, and so on. A review of recent incidents and research shows that modern cockpits have not generally reduced pilot workload during critical flight phases. This has been particularly true as see-through displays were added to existing cockpits. Many such 'add-on' designs are not integrated into the other cockpit systems. Because of the unique characteristics of head-mounted displays, simply duplicating head-down practices will exacerbate any lack of integration. Several cockpit design organizations and their products were also evaluated. Several cockpit display design guides were reviewed and characteristics of good design methodology and philosophy extracted. The keys to a good cockpit design organization are (1) suitable personnel for the team; (2) a structured information requirements study; and (3) early feedback from testing and user evaluation.
A Goal-Oriented Active Service Model and its COE Algorithm for Migrating Workflow System

Workflow management systems (WFMS) are complex distributed systems, which are geared for the orchestration of business processes across multiple organizations. In order to adapt to the heterogeneous, distributed and dynamic environment, we propose a goal-oriented active service model. The model is designed to support organizational coevolution for providing workflow services. This paper reviews the introduction and motivation for active service approach, discusses the technologies used in active service, which represents steps towards the end goal of building virtual service group and organizational coevolutionary(COE) algorithm.
Warning Signal Design: A Key Human Factors Issue in an In-Vehicle Front-To-Rear-End Collision Warning System

Warning signal effectiveness issues associated with the design of a front-to-rear-end collision warning system are discussed. Potential negative effects are that warnings may occur rarely, startling the driver and adding to cognitive load and stress, or alternatively, warnings may occur frequently and be ignored by the driver. To minimize negative effects, four design concepts are considered: (a) a graded sequence of warnings, from mild to severe, (b) a parallel change in modality, from visual to auditory, (c) individualization of warnings, and (d) a headway – distance to lead car – display.
Binary synaptic connections based on memory switching in a-Si:H

Nonvolatile, associative, electronic memory based on neural network models promises high (∼109 bits/cm2) information storage density since the information would be stored in a matrix of simple two terminal, passive interconnections. Device considerations dictate that such connections should be weak. For example, connections with ∼106Ω resistance are quite adequate in a 1000×1000 matrix (∼250K bit ROM). Irreversible memory switching in hydrogenated amorphous silicon (a‐Si:H) thin films is studied as a candidate mechanism for a prototype binary PROM matrix. The memory switching in a‐Si:H is current induced and requires very low energy (∼1 nanojoule for 1 μm2 area of a 0.2 μm thick film) to switch from ∼1010Ω to ∼105Ω. Resistivity‐tailored, amorphous Ge1−xMx (M=Al, Cu) provides the (synaptic) ballast resistor in the microswitch. A novel side saddle test structure exhibits a potential for a very high density binary connection matrix.
Modeling the Phonon Transport in Nanowire with Different Cross-Section

The phonon transport in silicon nanowire was simulated by Monte Carlo Method (MCM). The effect on the phonon transport of the boundary reflection mode, cross-section size and cross-section shape was studied. Analysis shows that diffuse reflection can result in phonon accumulation at the circumferential boundary. As the cross-section size decrease, the nonuniformity of the temperature distribution within the cross-section becomes more severe. When the area of the square cross-section silicon nanowire (SCSN) is equal to that of the circular cross-section silicon nanowire (CCSN), the thermal conductivity of them is more close to each other.
Biophysical characterization of neuronal and skeletal muscle sodium channels, and their regulation by auxiliary beta subunits

Voltage-gated Na channels are responsible for the rising phase of action potentials, and consist of a pore-forming α subunit and one or more auxiliary β subunits. The α subunit alone is sufficient for the functional expression of Na channels, however, β subunits modulate the location, expression and functional properties of α subunits. My thesis will focus on three neuronal Na channels (Nav1.6, Nav1.7 and Nav1.8) and one skeletal muscle Na channel (Nav1.4). Neuronal Na channel are key players in the impulse propagation along axon. Nav1.7 and Nav1.8 are the main Na channels expressed in DRG neurons, and their altered expression and modulation following injury and inflammation play a major role in nociception and chronic pain. Nav1.6 is highly concentrated at nodes of Ranvier, and has a critical role not only in saltatory conduction but also in high-frequency repetitive firing. Skeletal muscle Na channel Nav1.4 is the initiator of muscle contraction. Mutations in Nav1.4 cause skeletal muscle channelopathies. Guiding questions for our investigations were: 1) How do auxiliary β subunits regulate peripheral nerve Na channel Nav1.6 and Nav1.8? 2) What is the underlying biophysical defect of M1476I, a novel founder SCN4A mutation associated with painful cold-induced myotonia in French Canadians? 3) What is the biophysical characterization of the Nav1.6 persistent current? 4) What is the expression pattern of auxiliary  subunits, and how do β subunits regulate Nav1.7 in DRG neurons? We addressed these questions by multiple approaches including patch clamp techniques for whole-cell and single-channel recordings in heterologous expression systems; immunohistochemistry, single-cell RT-PCR and immunoprecipitation in DRG neurons. Firstly, we employed single-cell RT-PCR of acutely dissociated DRG neurons to identify the expression of β1-4 subunits in small-diameter sensory neurons. Our results indicated that small-diameter DRG neurons widely expressed Nav1.6 and Nav1.8 channels and β1-β3 subunits. Co-expression studies were used to assess the regulation of Nav1.6 and Nav1.8 by β subunits. The β1 subunit induced a significant increase in the current density of Nav1.8 when co-expressed in HEK293 cells, but had no effect on that of Nav1.6. In addition, the Cterminal domain of β1 was involved in the modulation of Nav1.8 channel based on the
Lot-sizing for time-phased production

As a first step we develop an interactive simulation-based planning method for campaign production. Then the efficiencies of some lot-sizing methods for this type of production are analysed. A campaign is a set of products that must be manufactured in a certain sequence. Realistic problems include multistage–multiproduct-situations with arborescent structures. With such assumptions simulation studies are performed to show that heuristics developed for the non- time-phased production are not suitable for the time-phased production. Based on simulation results recommendations are made for the use of certain heuristics to examine situations with known data constellations. These recommendations are embedded in the interactive planning process called the ICOP-method.
Design and Implementation of Intelligent Baby Room Monitoring System Based on the Internet of Things

In this paper, a special environment for the baby room monitoring devices is designed. The system uses technology of Things based on Zigbee. The system has temperature sensor, humidity sensor, wet alarm, infrared alarm and other information collection systems and music players control system. The system also includes microphone and camera information collection system based on TCP / IP protocol. Through information processing of intelligent controller, the family can be real-time observation of environmental parameters baby at home. Families can also be information monitoring and remote control via remote access intelligent controller.