Miracle-dz/UniFAR-FTUs huggingface dataset:
Extraction of Compensated os - cr,,,,.and ov Stresses from a Single Four-Contact Sensor using the Spinning Transverse Voltage Method

This paper reports on a novel method for extracting two stress components separated from undesired signal contributions with a single four-contact piezoresistive structure. To date, such results were obtained only using two separate four-contact structures, e.g., Wheatstone bridges of piezoresistors and piezo-FETs, or using structures with a larger number of contacts. The method proceeds by spinning the current in the device, similarly to the spinning current method for Hall devices. It features the capability of (i) extracting both om - ow and oQ stresses, (ii) separating the stress dependent signals from other undesired signals, such as Hall voltages, thermoelectric voltages, and tempetature dependent effects, and (iii) a straightforward integration into mixed signal systems without the necessity of any compensation of offsets due to the amplifier and AID conversion stage. Further, the approach is even applicable to nonlinear devices.
Ignition and Flame Travel on Realistic Building and Landscape Objects in Changing Environments

Effective mitigation of external fires on structures can be achieved flexibly, economically, and aesthetically by (1) preventing large-area ignition on structures from close proximity of burning vegetations and (2) stopping flame travel from firebrands landing on combustible building objects. In using bench-scale and mid-scale fire tests to obtain fire growth properties on common building construction and landscaping plants, a model is being developed to use fast predictive methods suitable for changing environments imposed on the parcel lot consisting of structures and ornamental plants. When fully implemented and validated, the property owners and associated profes- sionals will be able to view realistically in real-time (or faster) the various fire scenarios with the ability to select building materials and shapes as well as select ornamental plant species and placement for achieving the desired fire mitigation. Because of the analytical model's ability to respond to the changing "parcel" environments of wind, temperature, humidity, moisture, sunshine, and wildfire sources of heat and embers, as well as to variations in building construction and ornamental plants, means that analysis can be done eventually for various neighborhoods. The mathematical formula- tion presented at the 2006 BCC Symposium is partially shown here and some results are compared with (1) our refurbished and modified Lateral Ignition and Flame Travel Test (ASTM E1321 and E1317), (2) specialized testing of Class B burning brand (ASTM E108) in the Cone Calorimeter (ASTM E1354), (3) room-corner tests with OSB (ISO 9705), and (4) Cone Calorimeter tests of fire resistive materials such as FRT plywood and single-layer stucco-coated OSB. A preliminary Fortran dll file has been generated for use in other models, such as ecoSmart Fire.
Comparative study on transient stability analysis of wind turbine generator system using different drive train models

A huge number of wind generators are going to be connected with the existing network in the near future. Therefore it is necessary to analyse the transient stability of power systems, including wind turbine generator systems (WTGS). It has already been reported that one-mass or lumped model of wind turbine system is insufficient to analyse the transient behaviour of WTGS. It has also been reported that for the precise transient analysis of WTGS, a six-mass drive train model is needed. The reduced order models (three-mass and two-mass) have also been adopted so far for transient behaviour analysis. But the transient stability analysis of using six-mass, three-mass and two-mass drive train models has not been reported sufficiently so far in the literature. The authors have conducted an analysis using these methods. First, a detailed transformation procedure is presented from six-mass drive train model to two-mass model, which can be used in the analysis of transient stability simulation with sufficient accuracy. It is then determined which drive train model is appropriate for transient stability analysis of grid-connected WTGS. The effects of drive train parameters (such as inertia constant, spring constant and damping constant) on stability are examined using the above mentioned types of drive train models. Moreover, different types of symmetrical and asymmetrical faults at different wind generator power levels are considered in the simulation analyses with and without considering damping constants in six-mass, three-mass and two-mass shaft models. Considering the simulation results, it can be concluded that two-mass shaft model is sufficient for the transient stability analysis of WTGS.
FROM ENTERPRISE NETWORK TO NETWORK ENTERPRISE: ANOTHER PERSPECTIVE OF MULTIPLE CRITERIA DECISION MAKING FOR BUILDING CORPORATE INFORMATION SYSTEM

AbstractEnterprise network is an important component for building corporate information system. Furthermore, dramatic changes of computing and communication technologies make it possible for enterprise network to run the whole business process. This paper proposes a new perspective of enterprise network, called network enterprise. Network enterprise can maximize the potential of the network resources. A multiple criteria decision making framework is employed to illustrate the practical usefulness of this perspective. Furthermore, a methodology, PAM (Potential Analysis Methodology), is proposed to enable the network enterprise.
A Solution to Multi Objective Optimal Power Flow Using Hybrid Cultural-Based Differential Evolution

This paper presents a hybrid Cultural-based Differential Evolution for solving a multi-objective Optimal Power Flow (OPF) in support of power system operation and control . The multi-objective OPF was formulated for tackling with total generation cost and environmental impacts simultaneously. The proposed method was applied to the standard IEEE 30-bus test system. The results show that solving the multi-objective OPF problem by the Cultural-based Differential Evolution is more effective than other swarm intelligence methods in the literature.
THE USE OF WATERFALL MODEL IN APPLICATION DESIGN WEB-BASED MARYAM DEPARTMENT STORE

Maryam Department Store is a groceries sales business. Cause of high demand for groceries needed by consumers, it also needed to notes the report fast. In increasing the service and ease of transactions, so thats way the system design in selling at Maryam Department Store. The implementation of this information system is expected to be a solution in solving problems and progress at Maryam Department Store. The system design model used is prototyping. The result of this research is a programming application for Maryam Department Store based on Web
A novel soft-switching buck-boost type AC-DC converter with high power efficiency, high power factor and low harmonic distortion

This paper presents the novel soft-switching buck-boost type AC-DC power converter with high power efficiency and high power factor. In this AC-DC power converter, the power factor and harmonic distortion are improved by using the third winding of the energy-storage reactor, and high power efficiency is achieved by the soft-switching operations of the main power switch and output rectifier diode. The equivalent circuit model with DC voltage sources is derived and the performance characteristics are analysed by this model. The analytical results are confirmed by experiments. As a result, it is clarified that the proposed AC-DC power converter satisfies the maximum limits of the input current harmonics distortion in IEC 1000-3-2 Class D and that its power efficiency is 95% at the rated load current.
All that Glitters is Not Gold: The Impact of Network and Cluster Technological Resources on the Breakthrough Innovations in the U.S. Semiconductor Industry

We investigate whether clusters and networks impact differently a firm's ability to generate technological innovations in a longitudinal study of US based semiconductor firms. We further examine whether resource profiles of firms explains their differential ability to benefit from the network and cluster technological resources. The preliminary results suggest that network technological resources positively impact the likelihood of generating breakthrough innovations. However the impact of cluster technological resources is negative. We further find that the resource-rich benefit more from their network technological resources while resource-deficient firms are at a greater disadvantage from the increasing cluster technological resources.
Production Experience From Smart Wells in the Oseberg Field

The Oseberg Field is located offshore Norway 140 km Northwest of Bergen at approximately 100m waterdepth. Including the recently installed Oseberg D gas platform, the field is developed with four offshore installations. The expected reserves estimate is 336 MSm3 of which 266 MSm3 has been produced by January 2000. Pressure maintenance is implemented by re-injection of associated gas and import of gas from the nearby Troll Field. In addition water injection takes place in some parts of the field. Oseberg is by May 2000 producing approximately 46000 Sm3/d (290000 stb/d) from 42 production wells. Plateau oil production of 81000 Sm3/d (510000 stb/d) ended in 1997. The initial 200m oil column has been reduced to an oil rim of 20-40m as more than 75 percent of the reserves have been produced. Most producers have experienced gas break through and oil production is now limited by gas handling capacity. The use of smart wells enables remote control of zones with excessive gas production. In the Oseberg Field, such completions have so far been installed in four wells. In the first well one 'smart' completion was installed in combination with mechanical sliding sleeves in two other zones. The primary objective was to verify the robustness of the equipment at downhole conditions of the Oseberg field. In the second well four zones with this completion was installed in a channel sand deposit. Rapid gas break through at the heel of the horizontal section was choked remotely, resulting in a reduced GOR and improved oil production rate. The third well with four zones was installed in a more homogenous formation. Communication was lost with three of the four zones after 40 days production. Production from the fourth well commenced in august 1999. Technical operations of the three zones were ok, but the well was experiencing production problems in the beginning due to poor pressure support and lifting problems.
Physically Motivated Water Modeling in Control-Oriented Polymer Electrolyte Membrane Fuel Cell Stack Models

Polymer electrolyte membrane fuel cells (PEMFCs) are prone to membrane dehydration and liquid water flooding, negatively impacting their performance and lifetime. Therefore, PEMFCs require appropriate water management, which makes accurate water modeling indispensable. Unfortunately, available control-oriented models only replicate individual water-related aspects or use oversimplistic approximations. This paper resolves this challenge by proposing, for the first time, a control-oriented PEMFC stack model focusing on physically motivated water modeling, which covers phase change, liquid water removal, membrane water uptake, and water flooding effects on the electrochemical reaction. Parametrizing the resulting model with measurement data yielded the fitted model. The parameterized model delivers valuable insight into the water mechanisms, which were thoroughly analyzed. In summary, the proposed model enables the derivation of advanced control strategies for efficient water management and mitigation of the degradation phenomena of PEMFCs. Additionally, the model provides the required accuracy for control applications while maintaining the necessary computational efficiency.
Isolation Related to the COVID-19 Pandemic in People Suffering from Parkinson’s Disease and Activity, Self-Assessment of Physical Fitness and the Level of Affective Disorders

Background: Staying at home for long periods and limiting various types of activities and social contacts due to the COVID-19 pandemic may have negative consequences for health. This is especially true for people suffering from chronic diseases, in whom an appropriate level of activity and social contacts delay the progress of the disease. This group includes people diagnosed with Parkinson’s disease—PD. Aim: It was decided to investigate the effect of COVID-19 isolation related to self-assessment of physical fitness, physical activity, and the level of anxiety and depression in people with PD. Methods: The study included 30 patients diagnosed with Parkinson’s disease. We compared the results of the pre-pandemic questionnaire and the telephone interview with the same questions—after the period of isolation due to COVID-19. The questionnaire included questions about physical activity and fitness self-assessment. The level of affective disorders was tested using HADS. Results: There was a statistically significant decrease in the physical activity of the respondents after isolation related to COVID-19 (p < 0.05). Self-assessment of physical fitness also decreased, but the differences were not statistically significant. In the post-isolation study, only 50% of the respondents had normative values for anxiety and only 40% for depression. The analysis showed that the level of physical activity—the independent variable, explains anxiety in 30% and depression in 27%. Conclusions: Pandemic isolation has significantly reduced physical activity in PD patients. There was a certain drop in the self-esteem of physical fitness in these people. Physical fitness is an important predictor of preventing the affective disorders of anxiety and depression. The effects of isolation due to COVID-19 require further research.
A novel approach for wide bandhigh-efficiencypower amplifier design

Wireless communication systems require an efficient and broadband RF frontend. RF Power Amplifiers (PA) are the most critical component in the RF frontend and are considered the bottleneck in high efficient wideband transmitters. The research starts with an investigation of high efficient operation modes based on waveform engineering. The outcome of the research can be divided into two main parts: The first concerns an analysis of high efficient modes of operation. The second part builds on first part looking at the PA’s efficiency-bandwidth perspective to design a wide band high efficient PA. The first part of the thesis, introduces a novel linear high efficient PA mode termed Injection Power Amplifier (IPA) that exceeds drain efficiency of 90% without relying on the nonlinearity of a PA at the compression region. This is achieved by presenting appropriate negative harmonic impedances to a transistor to reduce the dissipated power, thus, increasing the efficiency of conversion of DC to fundamental RF power. The theoretical analysis of this mode is presented and a validation measurement has been carried out using an active load-pull system. The measured results confirmed the theoretical predictions of achieving high efficiency in a linear PA operation. Furthermore, a PA structure that is based on two parallel PAs (main PA and auxiliary PA) has been proposed along with the practical circuit realization of the IPA mode. In addition, a PA prototype has been designed following a methodology of nonlinear PA design based on waveform engineering. The PA prototype has been characterized and built operating at 0.9 GHz with an output power of 10 W showing a high linear efficient operation of 80% drain efficiency at only 1 dB compression level. The second part of this work aims to tackle today’s limitation of high efficient wideband PAs beyond octave bandwidth. A conceptual system based on multimode operation has been proposed to overcome the need for bandlimiting passive harmonic termination. This novel approach is based on combining passive termination with active harmonic injection to get around the theoretical limitation of one octave for high efficiency harmonically tuned power amplifiers. Furthermore, a proof of concept PA prototype has been designed and built for a two octave bandwidth (4:1 bandwidth) operating from 0.63-2.56 GHz and providing the rated output power of a 10 W GaN device with a PAE greater than 50% at only 1 dB compression point. This multi-mode approach shows a promising technique for future wideband high efficiency wireless transmitters.
Novel broadband rectenna using printed monopole antenna and harmonic‐suppressed stub filter

This article reports a novel broadband rectifying antenna (rectenna) using the printed monopole antenna and the band‐pass stub band‐pass filter, which is designed in the microstrip line structure at 2.45 GHz for the wireless transmission of microwave power.We suggest a novel H‐shape printed monopole antenna with size reduction of the radiator and the ground plane using surface current distribution, and a broadband stub band‐pass filter with suppression of the second harmonic. The rectifying circuit with stub filter doesn't need additional area because it is fabricated on the ground plane, which is widened to acquire broadband characteristic of the monopole antenna. The RF‐to‐DC conversion efficiency of 66% is obtained by using a load resistor of 270 Ω at 2.45 GHz. Also, the conversion efficiency is maintained from 2 GHz to 3 GHz above 50%. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1194–1197, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25130
REMOVABLE TWIN BLOCK FUNCTIONAL APPLIANCE IN THE TREATMENT OF CLASS II DIVISION 2 MALOCCLUSION

This case report shows the treatment effects of class II division 2 malocclusion in a 10 years old boy with twin block functional appliance. The treatment consists of two stages: First stage- treatment with removable twin block functional appliance followed later by second stage: fixed appliances to correct the position, the torque of upper central incisors.
Optimal vector modulation of a PWM current source converter according to minimal switching losses

A PWM current source frequency converter is an alternative to control variable speed AC-drives instead of commonly used voltage source frequency converters. Space vector control techniques are widely adopted for high performance drives while the control system is most conveniently implemented by microprocessors, microcontrollers and DSPs. Space vector pulse width modulation is also an appropriate technique for the phase current modulation of a current source converter (CSC). Either "5-switch" or "4-switch" space vector modulation can be used, the latter being perhaps more popular. Different modulation strategies can be developed by selecting an appropriate vector sequence for the switching cycle. Therefore this paper discusses the significance of the vector sequence on the IGBT switching voltages in order to reduce switching losses of the CSC bridge. An optimal vector modulation strategy, which minimizes the switching losses of the CSC bridge, is developed and analyzed in detail. Finally, the results are verified by PSpice(R) simulations.
The benefits of Indigenous education: Data findings and data gaps

Although the headline target for the Council of Australian Governments (COAG) Closing the Gap agenda is the elimination of the life expectancy gap between Indigenous and non-Indigenous Australians, in numerical terms, education dominates with three of the six targets related to it. This includes targets related to preschool access (Target 3), literacy and numeracy (Target 4) and Year 12 completion (Target 5). The setting of these targets clearly recognises that not only is education important in and of itself, but without reducing disparities between Indigenous and non-Indigenous Australians in education, other targets on health and employment are unlikely to be met.
On-chip polarization handling for silicon nanophotonic integrated circuits

Silicon-on-insulator (SOI) nanowire provides a very promising way to realize the future large-scale nano-photonic integrated circuits because of the CMOS compatibility and the ability for ultrasharp bending. The giant birefringence of SOI nanowires makes on-chip polarization handling become very important and useful for many applications, like polarization-transparent silicon photonics, coherent optical communications, and on-chip quantum photonics. In this paper, our recent work on on-chip polarization handling is reviewed and summarized, including polarization-beam splitters, polarization rotators, as well as polarization splitter rotators.
Control analysis and desig n to improve instrument performance

This work describes how the methods of control system analysis and design can be applied to meet performance requirements of an instrument. The basic methods and steps are: mathematical modelling of the instrument, analysis of performance and stability, design modifications to provide satisfactory performance, simulation by computer to verify the design, implementing the modification into the instrument, and verification of the proposed design by tests.
ANALYSIS OF MULTILEVEL INVERTER IN DIFFERENT LEVELS

This paper analyses the structure of new type of multilevel inverters suitable for high voltage and high power applications. The proposed topologies significantly reduces the number of dc voltage sources, switches, IGBTs, and power diodes as the number of output voltage levels increases. Two type of multilevel inverters have been compared in this paper. The objective of this paper is to understanding the working and simulation study of3 pulse 7 level and 12 pulse 7 level multilevel inverter by PWM technique using MATLAB/SIMULINK software. Keywords—Multipulse converters, Voltage source converters, Multilevel inverters, FACTS devices.
A Fault Diagnosis Approach for Gears Using Multidimensional Features and Intelligent Classifier

Gear mechanisms are an important element in a variety of industrial applications and about 80% of the breakdowns of the transmission machinery are caused by the gear failure. Efficient incipient fault detection and accurate fault diagnosis are therefore critical to machinery normal operation. A new hybrid intelligent diagnosis method is proposed in this work to identify multiple categories of gear defection. In this method, wavelet packet transform (WPT), empirical mode decomposition (EMD) and Wigner-Ville distributions (WVD), combined with autoregressive (AR) model algorithm, were performed on gear vibration signals to extract useful fault characteristic information. Then, multidimensional feature sets including energy distribution, statistical features and AR parameters were obtained to represent gear operation conditions from different perspectives. The nonlinear dimensionality reduction algorithm, i.e. isometric mapping (Isomap), was employed in statistics to mine the intrinsic structure of the feature space in a low-dimensional space, and thus to speed up the training of the probabilistic neural network (PNN) classifier and enhance its diagnosis accuracy. Experiments with different gear faults were conducted, and the vibration signals were measured under different drive speeds and loads. The analysis results indicate that the proposed method is feasible and effective in the gear multi-fault diagnosis, and the isolation of different gear conditions, including normal, single crack, compound fault of wear and spalling, etc., has been accomplished. Since the recognition results are available directly from the output of PNN, the proposed diagnosis technique provides the possibility to fulfill the automatic recognition on gear multiple faults