Miracle-dz/UniFAR-FTUs huggingface dataset:
A novel differential filtering SIW power divider with high selectivity

A novel differential power divider with bandpass filtering response using the substrate integrated waveguide (SIW) technology is presented. An SIW resonant cavity operated in a balanced resonant mode with odd symmetric electric field distribution is utilized to provide both balanced inputs/outputs and expected common‐mode (CM) suppression in a certain band. Meanwhile, by properly constructing the cross‐coupled topology of SIW resonant cavities, the proposed differential power divider achieves a high‐selectivity bandpass filtering response with two transmission zeros on both sides of the passband. The differential power divider is designed and prototyped on a single‐layer printed circuit board (PCB). The measured center frequency is at 10.6 GHz with 490 MHz 3‐dB bandwidth. A good CM suppression can also be achieved within the operating band. The measured in‐band differential‐mode imbalance for magnitude is ±0.3 dB, while for phase is 0°–4°. © 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:182–188, 2016.
Design Optimization of a Cartesian Parallel Manipulator

This paper introduces a 3-DOF translational parallel manipulator called Cartesian Parallel Manipulator (CPM). The manipulator consists of a moving platform that is connected to a fixed base by three limbs. Each limb is made up of one prismatic and three revolute joints and all joint axes are parallel to one another. In this way, each limb provides two rotational constraints to the moving platform and the combined effects of the three limbs lead to an over-constrained mechanism with three translational degrees of freedom. The manipulator behaves like a conventional X-Y-Z Cartesian machine due to the orthogonal arrangement of the three limbs. Two actuation methods are analyzed. However, the rotary actuation method is discarded because of the existence of singularities within the workspace. For the linear actuation method, there exists a one-to-one correspondence between the input and output displacements of the manipulator. The effects of misalignment of linear actuators on the motion of the moving platform are discussed. Each limb structure is exposed to a bending moment induced by external forces exerted on the moving platform. In order to minimize the deflection at the joints caused by the bending moment, a method to maximize the stiffness is suggested. A numerical example of the optimal design is presented.
TQM in higher education ‐ a review

Posits that the role that quality plays in the higher education sector is becoming more important as the dominance of market‐orientation leaves no alternative for universities and colleges but to improve their quality while increasing efficiency. Philosophies like total quality management (TQM), which have been successfully adopted in commercial organizations, are generally seen as the way forward. Includes a review of the published literature on theories and applications of TQM in higher education. The case studies were analysed using ten features found to be critical to a total quality philosophy. Conclusions were drawn regarding similarities and differences between higher education and other environments as well as between US and UK approaches.
Avaliação do impacto da remoção de características comuns em estratégias de busca de arquivos similares

Investigações de forense digital enfrentam um importante problema: a grande quantidade de arquivos armazenados em dispositivos apreendidos. Para analisar esses dispositivos de forma mais eficiente, utilizam-se estratégias de busca de similaridade, capazes de encontrar arquivos idênticos, ou até mesmo similares, à um dado conjunto de arquivos, usando técnicas de pareamento aproximado. No entanto, esta busca pode ser prejudicada devido a blocos comuns, como cabeçalhos, presentes em diferentes arquivos. Este trabalho objetiva avaliar o impacto da remoção de blocos comuns na performance das estratégias. Os resultados mostram uma redução significativa na taxa de falsos positivos com um aumento aceitável no tempo de execução.
The use of waste mussel shell in sulfate-reducing bioreactors treating mine-influenced waters

V Co-Authorship Form . VIII Acknowledgments . X Table of Content . XII List of Figures . XVI List of Tables . XX Acronyms and abbreviations . XXIII List of publications and outcomes . XXV Chapter 1: General Introduction, Research Objectives & Thesis Layout . 1 1.
Variable–focus liquid lens simulation

A numerical study of liquid–based variable lenses is presented in this paper. The effect of applied voltage and the contact angle of the surface are taken into account. The conservation of mass and the Navier–Stokes equations for a Newtonian incompressible fluid were solved to model the fluid flow both inside and outside the droplet. The electrohydrodynamic equations have been solved using the commercial software COMSOL MULTIPHYSICS™ based on the finite element method. It was found that by increasing the viscosity ratio, the time response decreases which can be suitable for camera purposes.
Geopolitical Uncertainties and Malaysian Stock Market Returns: Do Market Conditions Matter?

Geopolitical uncertainties have been a concern for global economies and financial markets’ participants. By employing Markov switching regression and quantile regression, we investigated the effect of global and country-specific geopolitical uncertainties on Malaysian Conventional and Islamic stock returns in different market conditions. The estimated results of the Markov switching regression show that Malaysian conventional and Islamic stocks react differently to global and country-specific geopolitical uncertainties under different market volatility conditions, implying volatility dependent exposures and reactions to global and country-specific geopolitical uncertainties. The quantile regression results also reveal that Malaysian conventional and Islamic stocks respond differently to global and country-specific geopolitical uncertainties at different market stages. The empirical findings, therefore, indicate a heterogeneous and non-linear stock reaction to geopolitical uncertainties, providing new insights into geopolitical uncertainties and stock return relationships. Hence, the results will be valuable for asset pricing and investments in an emerging market such as the Malaysian market.
Dissolving the value-price transformation Rubik's cube: A response to Steve Toms’ review of Accounting for Value

Toms disputes the Temporal Single-System Interpretation's claim to have refuted Bortkiewicz’s influential charge that Marx's transformation from values to prices is ‘inconsistent’. This is a claim that Bryer supports with a replacement cost accounting interpretation, which Toms asserts leaves the ‘problem’ an ‘unsolved’ Rubik's cube. This conclusion is seriously misleading, the note argues, which illustrates the dangers from failing to always take the ‘social turn’ in accounting history research.
Universities as key enablers to develop new collaborative environments for innovation: successful experiences from Switzerland and India

A large variety of organisational forms for collaboration have emerged during the last years as a result of the many socio-economic challenges faced by the society and enabled by the new ICT developments. As a result, in both developed and developing countries, different initiatives are carried out to motivate organisations, to network in new collaborative environments for innovation. In few cases, these initiatives have been promoted by Universities where academic researchers play a very important role by diffusing these networking concepts to local SMEs and by carrying out applied projects to coach and guide firms in the formation of these new collaborative environments. The Virtuelle Fabrik and Swiss Microtech in Switzerland and the TeNeT group in India are three successful collaborative environments located in different settings where a local university has played, and still plays, a very important role for the collaborative environments’ creation, continuous evolution and improvement. Therefore, the objective of this paper is twofold: (1) to describe the local university key role for developing new collaborative environments and (2) to propose a methodology to benchmark and assess the different initiatives carried out by universities to develop new successful collaborative environments, identifying critical success factors (CSFs).
Room‐Temperature Low‐Voltage Control of Excitonic Emission in Transition Metal Dichalcogenide Monolayers

Charge doping of materials with 2D and 3D quantum confinement is a flexible tool to tailor their excitonic emission. Here, using electron doping experiments on transition metal dichalcogenide (TMD) monolayers, reversible tuning of charged exciton emission within a redshift of up to 75 meV is demonstrated by applying very modest voltages (corresponding roughly to the band gap of TMDs), while also controlling the radiative lifetime and intensity. It is found that the neutral exciton ionization dynamics at increasing electron doping follows the Fermi–Dirac distribution, which allows to determine the size of the band gap as well as to extract experimental values for effective masses of electrons and holes at room temperature. The tunable excitonic emission, preserving coherence at room temperature, holds great promise for quantum technologies requiring deterministic coupling with integrated photonic and plasmonic devices.
Experimental Evaluation of Remote Beamforming Scheme with Fixed Wavelength Allocation in IF-over-Fiber Systems

: Radio over fiber (RoF) technology, especially intermediate frequency over fiber (IFoF), is attracting much attention as one way to realize high frequency band systems. Such systems require beamforming to attain the desired link budget. Furthermore, highly accurate beamforming permits the adoption of space division multiplexing (SDM), with its greater system capacity. Since beamforming should be controlled by the central station to achieve simple base stations, we proposed a novel remote beamforming scheme with fixed wavelength allocation. This paper introduces experiments conducted on modulated signals to evaluate the characteristics of the scheme’s beamforming gain and signal to interference ratio (SIR).
Experiments with a 3DD robotic manipulator operating by a sensor-based assembly

In the sensor-based navigation, a mobile robot arrives at its goal surely if there is a path to the goal in a 2D uncertain environment, otherwise, the robot recognizes no deadlock-free path automatically. We call this the deadlock-free characteristic. Based on this characteristic, all the previous sensor-based algorithms are classified into metric, topologic, and geometric ones, and also robustness of each algorithm is discussed against sensor, position and orientation errors. In this paper, we apply these fruitful results to the manipulation, i.e., assembly or parts mating. As compared with the navigation, the manipulation needs not consider any nonholonomic characteristic, but deals with a large number of degrees of freedom. In this paper, we propose a metric sensor-based assembly algorithm for a manipulator with three or more degrees of freedom and then show its feasibility by experimental results using a 3DD manipulator with a 6D force sensor.
Investigating personal safety at railway stations using “virtual reality” technology

Understanding fear of crime is a crucial dimension to the “designing out crime” debate, particularly in view of the “dark figure” of crime which remains largely unknown due to under‐reporting and under recording of incidents. On the railways, customer satisfaction surveys have consistently reported that although recorded incidents of crime and nuisance are relatively low, customers perceive their personal risks to be significantly higher, discouraging many from using rail transport. This study of a representative sample of railway stations on a network in South Wales, focuses on personal safety issues as explained using the theory of crime prevention through environmental design (CPTED). The research project innovatively utilises interactive virtual reality scenes as the environmental stimuli to elucidate rich sources of data in terms of where passengers’ fears were located in and around the station and how service providers can make stations safer. Some basic design changes are briefly evaluated and recommendations for those who design and manage built environment facilities are discussed.
Reply to Discussion on: Supergene sulphuric acid speleogenesis and the origin of hypogene caves: Evidence from the Northern Pennines, UK in Earth Surface Processes and Landforms, 46, 455–464 (2021)

Harrison (2021) disagrees with Webb (2021) on two main points: the hypogene origin of the Northern Pennines maze caves and the role of iron sulphide oxidation in their formation. Taking the second point first, we both acknowledge that sulphide oxidation is the source of the acidity that created the caves. The reactions in Dale et al. (2015) and Webb (2021) are essentially the same, and both show that oxidation of galena/sphalerite does not generate acidity unless the Pb/Zn released reacts with HCO3 or H2CO3 (= CO2 + H2O) to precipitate cerussite/smithsonite. Dale et al. (2015) did not specify the source of H2CO3 but it cannot be atmospheric CO2, because in that case every galena/sphalerite vein in the Northern Pennine orefield could have formed a nearby maze cave. There are hundreds of mineralized veins in the orefield but only 10 currently accessible maze caves are known in the whole region; around Middle Fell there are > 40 mineralized veins but only one maze cave, Hudgill Burn Mine Caverns (figure 2 in Webb, 2021). Furthermore, within Sloate Hole Mine Caverns ‘galena . persisted in the residual red-brown clay on the cave floor, where it formed an easily-mined source of ore’ (Dunham & Wilson, 1985, p. 88); if oxidation of galena had formed the cave, it is unlikely that substantial amounts of this mineral would remain. Finally, if cerussite precipitation was a prerequisite for cave formation, this mineral should have been abundant at all the Northern Pennines maze caves, but this is true only of Hudgill Burn Mine, which was unique in the orefield for the abundance of cerussite (Dunham, 1990). Therefore an additional source of acidity was required for maze cave formation. Of the other sulphide minerals found in the Northern Pennine orefield, pyrite and marcasite are good candidates, as oxidation of one mole of these minerals releases four moles of acidity. This acidity can then dissolve limestone to create maze caves, at the same time forming HCO3 and H2CO3 that can react with the Pb 2+
Fuzzy expert system for road type identification and risk assessment of conventional two‐lane roads

This paper first presents a fuzzy expert system to identify and classify conventional two‐lane roads based on geometric characteristics. Both fuzzy and neuro‐fuzzy techniques have been used. Fuzzy logic has proved suitable to address this problem, since in this case, there is a variability of input information, and classical rules are not suitable to be used due to the uncertainty introduced by some combinations of the variables. Each road's geometric features were measured by sensors in an equipped vehicle, and are subsequently used to classify the roads according to their real condition. The conventional two‐lane roads used for this research are located in the Madrid Region, in Spain. This intelligent system may be used to update the road database regarding the assigned type to each conventional road, according to their present features and state. Also, a risk identification system has been developed to assess whether a vehicle is driving on a two‐lane road with an inappropriate speed, combining variables such as the former identification model, vehicle type, road longitudinal gradient, the angle covered by each horizontal curve, and the existence or not of an additional traffic lane. A fuzzy risk index is proposed for this approach. This fuzzy model may be useful to detect road sections where safety must be enhanced by revising the speed limit, since less safe situations may arise from travelling at unappropriated speeds.
Electromagnetic performance analysis of omega‐type metamaterial radomes

Radomes usually used for protection of antennas from environment should have minimum degrading effects on antenna performances. Recently, metamaterials are used in radome designs to improve their characteristics. In this work, various combinations of omega type metamaterial are investigated in planar radome designs. The simulations show that some of these structures have good performances in the designed frequency range 13–17 GHz up to incident angle 70°. Moreover, retrieval method is used to determine the effective parameters of the structure. The radome is also investigated in the presence of a microstrip antenna. © 2011 Wiley Periodicals, Inc. Int J RF and Microwave CAE , 2011.
Research on Quantization Error Influence of Millimeter-Wave Phased Array Antenna

The millimeter-wave phased array antenna is a higher integration system that is composed of different subarray modules, and in actual engineering, the existing amplitude, phase errors, and structural errors will change the performance of the array antenna. This paper studies the influence of the random amplitude and phase errors of the antenna array in the actual assembly process and the actual position errors between the subarrays on the electrical performance of the antenna. Based on the planar rectangular antenna array-electromagnetic coupling model, we propose a method of verifying the effect of random errors on the phased array antenna. The simulation result shows that the method could obtain the critical value of the error generated by the antenna subarray during processing and assembly. To reduce the error factor, it is necessary to ensure that the random phase and amplitude error should not exceed 10 ° , 0.5 dB . The error in the X-direction during assembly should be ≤ 0.05 λ , and the error in the Y-direction should be ≤ 0.1 λ . When symmetrical deformation occurs, the maximum deformation should be less than 0.05 λ .
HRM in the Australian Luxury Hotel Industry: Signs of Innovation?

The Australian luxury hotel industry has experienced substantial growth in recent years. Subsequently, this sector has become an increasingly important and influential dimension of the hospitality industry, as well as the service sector. Despite this, a paucity of empirical research exists, focusing on the human resource strategies and outcomes within luxury hotels. Little is known of the employment systems operating in these firms. Moreover, within the extant literature, which focuses more broadly on the hotel industry, contradictions have begun to emerge regarding the nature of hotels' management practices. While research has traditionally characterised hotels' employment strategies as adversarial and largely ad hoc, a small number of studies have documented more strategic and quality focused systems, reflecting more sophisticated human resource management (HRM). Consequently, this study analyses employment practices within luxury hotels in Australia in order to characterise HRM systems in these firms. The results provide an indication that luxury hotels are deploying a relatively more sophisticated approach to HRM than depicted by the traditional research literature.
Exploring Psychosocial Determinants of Diversity Sensitive Task Perception and Behavioural Intentions in a Health Care Student Population: Recommendations for Diversity Education in Health Care

Background: Diversity sensitive task perception and diversity sensitive behavioural intentions are strong predictors of diversity sensitive care. Nevertheless, it has been less clear which psychosocial determinants are affecting these concepts in health care providers. This article also explores whether there are differences in relationships between these concepts, and how these concepts are interrelated. The study focussed on the following psychosocial determinants: (a) ethnocentric attitudes and (b) intercultural capabilities. The latter concept is drawn from the four-dimensional construct of intercultural intelligence. Methods: A survey was conducted in a health care student population (N = 364). In addition to classic survey questions, behavioural intentions were measured through the use of eight vignettes comprising situations characterised by diversity in health care. Results: Regression analyses show that ethnocentric attitudes were negatively associated with diversity sensitive task perception and behavioural intentions. Interestingly, we found no significant relationship between cognitive intercultural capabilities (IC) and diversity sensitivity. Motivational- and behavioural intercultural capabilities were significantly associated with diversity sensitive task perception and behavioural intentions. Motivational IC had a stronger relationship with task perception. Behavioural IC had a stronger relationship with behavioural intentions. Adding diversity sensitive task perception in a supplementary regression model as an independent variable on behavioural intentions caused a shift in associations. The significant association between motivational IC and behavioural intentions disappeared, and a significant association between diversity sensitive task perception and diversity sensitive behavioural intention appeared. Conclusion: Diversity education should increasingly focus on diminishing ethnocentric attitudes and encouraging behavioural IC and motivational IC in health care students. The paper also suggests two theoretical hypothesises. Firstly, metacognitive IC is a concept strongly related to two IC: motivational IC and behavioural IC. Secondly, the relationship between motivational IC and behavioural intentions is fully mediated by diversity sensitive task perception. Further research that substantiate these theoretical hypothesises is recommended.
Integer-valued autoregressive processes with prespecified marginal and innovation distributions: a novel perspective

Abstract Integer-valued autoregressive (INAR) processes are generally defined by specifying the thinning operator and either the innovations or the marginal distributions. The major limitations of such processes include difficulties in deriving the marginal properties and justifying the choice of the thinning operator. To overcome these drawbacks, we propose a novel approach for building an INAR model that offers the flexibility to prespecify both marginal and innovation distributions. Thus, the thinning operator is no longer subjectively selected but is rather a direct consequence of the marginal and innovation distributions specified by the modeler. Novel INAR processes are introduced following this perspective; these processes include a model with geometric marginal and innovation distributions (Geo-INAR) and models with bounded innovations. We explore the Geo-INAR model, which is a natural alternative to the classical Poisson INAR model. The Geo-INAR process has interesting stochastic properties, such as MA( ) representation, time reversibility, and closed forms for the -order transition probabilities, which enables a natural framework to perform coherent forecasting. To demonstrate the real-world application of the Geo-INAR model, we analyze a count time series of criminal records in sex offenses using the proposed methodology and compare it with existing INAR and integer-valued generalized autoregressive conditional heteroscedastic models.