Miracle-dz/UniFAR-FTUs huggingface dataset:
Multifunctional Coreless Hall-Effect Current Transformer for the Protection and Measurement of Power Systems

This paper presents a multifunctional coreless current transformer based on the Hall effect (multifunctional HCT), and designs its actual electronic circuit that can discriminate load and fault currents to perform both metering and protective functions. The multifunctional HCT has two primary circuits: 1) distinguishes the load current from the fault current and 2) delivers the current value using an analog multiplexer. This HCT can eliminate the 2.5±0.05 V offset voltage of commercial Hall sensors. It possesses two amplifiers with different gains. Therefore, this multifunctional HCT accurately measures power currents during the operations in measurement systems and protection systems. Using a low-pass filter, the multifunctional HCT is not only capable of reducing noise interference, but also improves the accuracy of power current measurements. The experimental results show that the multifunctional HCT can exhibit an accuracy class of 0.5 for both the measurement and protection of power systems within IEC standard 60044-8. Because the proposed multifunctional HCT does not have core and saturation problems, the accuracy class and limit can achieve the standard accuracy limit factor grade of 63.
Subspace-based SIR estimation for CDMA cellular systems

The signal-to-interference ratio (SIR) has been highlighted in the literature to be an efficient criterion for several radio resource management algorithms such as power control and handoff. We address the problem on how to obtain fast and accurate measurements of this quantity in a practical context. We develop a general SIR estimation technique for code division multiple access (CDMA) cellular systems, that is based on a signal subspace approach using the sample covariance matrix of the received signal. Analysis and simulation results for an IS-95 like system show that the SIR can be estimated to within 80% of the actual SIR after less than seven frames, or within 90% of the actual SIR after less than 15 frames. We also study a computationally less expensive SIR tracking algorithm based on updating the signal subspace. We show that the algorithm works well in the context of a rapidly time varying channel.
Association mapping unveils favorable alleles for grain iron and zinc concentrations in lentil (Lens culinaris subsp. culinaris)

Lentil is a major cool-season grain legume grown in South Asia, West Asia, and North Africa. Populations in developing countries of these regions have micronutrient deficiencies; therefore, breeding programs should focus more on improving the micronutrient content of food. In the present study, a set of 96 diverse germplasm lines were evaluated at three different locations in India to examine the variation in iron (Fe) and zinc (Zn) concentration and identify simple sequence repeat (SSR) markers that associate with the genetic variation. The genetic variation among genotypes of the association mapping (AM) panel was characterized using a genetic distance-based and a general model-based clustering method. The model-based analysis identified six subpopulations, which satisfactorily explained the genetic structure of the AM panel. AM analysis identified three SSRs (PBALC 13, PBALC 206, and GLLC 563) associated with grain Fe concentration explaining 9% to 11% of phenotypic variation and four SSRs (PBALC 353, SSR 317–1, PLC 62, and PBALC 217) were associated with grain Zn concentration explaining 14%, to 21% of phenotypic variation. These identified SSRs exhibited consistent performance across locations. These candidate SSRs can be used in marker-assisted genetic improvement for developing Fe and Zn fortified lentil varieties. Favorable alleles and promising genotypes identified in this study can be utilized for lentil biofortification.
Refining the IT Business Value Model: Evidence From a Longitudinal Investigation of Healthcare Firms

Extant research into the business value of Information Technology (IT) explains that IT resources and complementary organizational resources impact organizational performance. This paper refines this explanation in three ways. We present theoretical arguments that (1) the direction of causality in the creation of IT business value may not be unidirectional, but that a positive feedback loop exists where IT investment in one time period improves organizational performance, which in turn enables additional IT investment in future time periods, (2) organizational resources may be more than merely complements of organizational performance, but may instead be determinants of organizational performance, and (3) the impact of IT capital resources on organizational performance is mediated by IT human resources. We support our arguments with empirical evidence built upon analysis of seven years of panel data gathered from healthcare firms. We find support for each of our eight hypotheses and present this research as a refinement and extension of existing models of IT business value.
Job Proximity and the Urban Employment Problem: Do Suitable Nearby Jobs Improve Neighbourhood Employment Rates?: A Comment

Scant attention has been paid in recent years in the UK to demand-side policies to tackle unemploym ent. Furthermore, neither the location of job opportunities for the unemployed, nor the location of the unemployed themselves, has been widely recognised as a signi® cant barrier to employment at the intracity or intra-conurbation scale. For these reasons, Daniel Immergluck’ s interesting paper bearing the above title in Urban Studies (Immergluck, 1998) is to be welcomed. Immergluck’ s approach is indeed a considerable advance on many previous methodologies used to test the spatial mismatch hypothesis in that he uses a direct measure of job accessibility. However, there are a number of methodological problems and data inadequacies in Immergluck’ s work, which collectively may serve to understate dramatically the effect of job proxim ity on neighbourhoods’ unemployment rates. Immergluck recognises some of these problem s and calls for more research into measuring spatial job accessibility. My motivation in writing this comment is twofold: ® rst, to draw attention to gravity models as existing accurate measures of spatial job accessibility which can be further improved by the use of total generalised travel cost rather than distance; and, secondly, to help ensure that a ̄ urry of similar studies which may be published in the future do not result in a false rejection of the spatial mismatch hypothesis. I shall proceed by showing how simple accessibility measures as used by Immergluck are poor re ̄ ections of the availability of jobs to an individual, and then by explaining how a gravity model is a favourable alternative. There are also considerable biases introduced by using distance in a measure of accessibility which serve to overstate the effective availability of jobs to high unemployment neighbourhoods, thus spuriously weakening the relationship between job proxim ity and employm ent rates. I shall then show how other anomalies will arise in Immergluck’ s results should there be signi® cant spatial mismatch in Chicago, the city to which his data relate, which serve further to understate that mismatch. I then conclude with some more general thought s on the unsuitability of aggregate data for testing the spatial mismatch hypothesis given our lack of understanding of spatial processes in local labour markets at present.
Effect of Supervised Work Experience on Perception of Work in the Tourism and Hospitality Industry

ABSTRACT This study examines how supervised work experiences, among other factors, affect tourism and hospitality undergraduates' perception of work in the industry. Other factors include parents' influence, students' experience with the industry as customers, family connections with the industry, previous industry-related work experience and sources of information about the industry. Perceived importance of tourism to the destination was also included, in view of the specific changes taking place in the tourism environment of the destination under study. Results indicated that undergraduates in junior students were influenced more by their parents while senior students their SWEs. The study offers recommendations to alter or enhance students' perception about industry work.
Learning How to Manage Technology in Services Internationalisation

Learning how to manage technology on foreign markets has become crucial for the competitive advantage of service firms. Not much has been written about how service firm learn to manage technology during internationalisation. This explorative study draws on verbatim accounts of critical incidents frorn key service employees in four Swedish service firms who recently started operations in Poland, Japan, Norway, Austria and Indonesia. Empirical evidence of learning and technical competercies presented in terms of a typology of competencies comprising: sourcing, developing, communicating, contracting and implementing technology.
Design, Construction and Implementation of a Low Cost Solar-Wind Hybrid Energy System

In this paper, we present the design, construction and implementation of a solar-wind hybrid system to obtain electric energy at low cost. Wind and solar power are becoming the alternative energies sources more popular, due to their abundance, availability and ease to obtain electric power. This research covers the construction of a hybrid renewable energy system for house applications, which uses simple materials for its construction and implementation. The hybrid system includes rechargeable batteries, which ones are charged by wind power via a small alternator and/or solar power via solar cells, both use a maximum power point tracking (MPPT) module. This energy system has been designed for low power consumption by its simplicity, however its flexibility allows it to grow modularly to cover own demand for households in different regions over the world. The aim of this work is the design and implementation of a solar-wind hybrid energy system using a simple design, for example, we adapted a simple motor of ceiling fan in the eolic system. This work is expected to sustain some part of the daily domestic electricity consumption with an efficient utilization of solar and wind power.
BER performance of an MRT-HQAM system over Rayleigh fading channels

Hierarchical quadrature amplitude modulation (HQAM) allows for transmission of multiple classes of data (such as voice, video and file transfer), provides flexibility in terms of coverage area and allows for network upgrades while maintaining backwards compatibility. However, the addition of hierarchical layers leads to higher-order modulation schemes which make the system increasingly susceptible to noise and fading. To mitigate fading while maintaining backwards compatibility, maximum ratio transmission (MRT) is incorporated into the HQAM system to maximise signal-to-noise ratio for a given number of diversity branches. This study presents a theoretical bit error rate (BER) performance analysis of an MRT enhanced HQAM (MRT-HQAM) system in Rayleigh fading. The BER performance gains of the proposed system over single-input–single-output and single-input–multiple-output HQAM systems are shown. The HQAM hierarchical modulation parameter is varied and the effects are presented. Furthermore, the authors present the effects of varying the number of antennas on the transmitting and receiving ends and discuss the optimal antenna configuration. The theoretical BER expressions used in the performance analysis are verified using simulation results.
Economics and Ecology of Managing Emerging Infectious Animal Diseases

producers, with pathogen transmission between wildlife and livestock of particular concern (Dobson and Foufopolous 2001). 1 The disease ecology literature mostly focuses on single host-pathogen interactions, but has recently turned to EIDs infecting multiple-hosts. This literature generally derives post-infection management advice (and does not specifically address prevention) from models evaluated at pre-disease equilibria free of pathogen risks (Roberts and Heesterbeek 2003; Dobson 2004). The economic aspects of this problem, however, have not previously been addressed. We adopt a bioeconomic approach to explore multiple-host disease management problems. Prior recommendations are shown to
Finite amplitude distortion-based inhomogeneous pulse echo ultrasonic imaging

Ultrasonic pulse echo imaging in inhomogeneous media suffers from significant lateral and contrast resolution losses due to the defocusing effects of the inhomogeneities. The losses in lateral and contrast resolution are associated with increases in the width of the mainbeam and increases in sidelobe levels, respectively. These two forms of resolution loss represent significant hurdles to improving the clinical utility of biomedical ultrasonic imaging. A number of research efforts are currently under way to investigate the defocusing effects of tissue and to consider corrective measures. All of these efforts assume linear propagation, and base the image-formation process on the reception of the transmitted pulse. A novel pulse echo imaging scheme in which the image is formed using the finite amplitude distortion components of the received pulse is considered here. Alternatively, this could be described as image formation using the nonlinearly-generated higher harmonics. In homogeneous beam propagations, it has been established that the sidelobes of nonlinearly-generated higher harmonics are much lower than their linear counterparts. Computations considered here suggest that this relationship also holds for the case of propagations through abdominal wall and breast wall tissue. These computations also suggest that the lateral resolution limits imposed by abdominal wall and breast wall tissue are slightly smaller for nonlinearly-generated second harmonics than for their linear counterparts. The resulting potential of these higher harmonics to improve image resolution is investigated.
Early detection of neurological disease using a smartphone: A case study

Diagnosing Parkinson's disease (PD) is often difficult, especially in its early stages. It has been estimated that nearly 40% of people with the disease may not be diagnosed. Traditionally, the diagnosis of Parkinson's disease often requires a doctor to observe the patient over time to recognize signs of rigidity. In this work, we propose a PDR-based method to continuously monitor and record the patient's gait characteristics using a smart-phone. Our tool could be useful in providing an early warning to the PD patient to seek medical assistance and help the doctor diagnose the disease earlier.
The role of ICTS in quantifying the severity and duration of climatic variations — Kenya's case

For the last 2 decades, Kenya has consistently contributed the highest number of people affected by natural disasters in Africa. This is especially so for disasters triggered by climatic variations. The Kenya Meteorological Department has provided regular weather forecasts since the 60s. One of the shortcomings of this Department's approach is the fact that their forecasts provide conceptual indications of droughts/floods without giving operational indicators. This makes it difficult for key stakeholders to develop solid strategic plans. Innovative use of ICTs can turn around this situation by realigning the forecasts to aid in answering questions such like, how long and how severe the predicted climatic variations will be. Use of cheaper wireless sensors can also help readdress the current poor coverage by weather stations. Based on analysis of 31 years of historical daily precipitation data from three weather stations, we prove that the Effective Drought Index can be used to quantify droughts/floods. We also present an effective web-based system that policy makers can use to monitor droughts/floods on daily basis. In the discussion, we explain how an on-going initiative aimed at integrating wireless sensor networks and mobile phones will further improve drought monitoring.
Analysis of the anticipative cobweb model dynamics

The cobweb model of competitive market dynamics has been examined in the form of system dynamics model. The classical formulation of the cobweb demand-supply model has been transformed in the set of equations suitable for system dynamics modelling. The model has been expanded by the time parameter Δt which enables the stability analysis of the model for the change in the Δt. The structure of the model has been presented and key relationships in the model have been examined. The cyclical response of the system which is dependent on the demand∼supply parameters and eigenvalues of the characteristic equation has been numerically examined.
Inattention, Hyperactivity, and Impulsivity in Teenagers with Intellectual Disabilities, with and without Autism

Objective: To explore inattentive, hyperactive, and impulsive behaviours in teenagers with intellectual disabilities (ID), with and without autism. Method: We identified teenagers with ID, with and without autism, in a single geographic area. Those with autism were matched for age, sex, and nonverbal IQ to those with ID only. We compared inattentive, hyperactive, and impulsive (IHI) behaviours in the 2 groups, along with adaptive functioning and medical circumstances. We further subdivided the autism group into those with IHI behaviours (autism IHI) and those without (autism non-IHI) and explored similarities and differences between autism subgroups. Results: As a group, those with autism and ID had more IHI behaviours than those with ID alone. More in the autism group met criteria for attention-deficit hyperactivity disorder and hyperkinetic syndrome. Lifetime exposure to psychotropic medication was greater in the autism group, with stimulant and antipsychotic medications predominating. However, just under one-half of those in the autism group showed no IHI behaviours. Comparison of autism IHI and autism non-IHI groups showed that those with IHI behaviours were significantly more likely to have past (but not current) exposure to stimulant medication. Conclusions: One in 2 teenagers with ID and coexisting autism displayed clinically significant inattentive, hyperactive, and (or) impulsive behaviours, compared with 1 in 7 of those with ID alone. Most of the remaining teenagers with autism displayed no IHI behaviours. Our results support the need for further investigation into the prevalence and etiology of these IHI behaviours in individuals with autism.
On an output feedback finite-time stabilization problem

Studies the problem of finite-time output feedback stabilization for the double integrator system. A class of output feedback controllers that can achieve global finite-time stability for the double integrator system are constructed based on a "finite-time separation principle. " Furthermore, it is shown that the closed-loop system resulting from our control law can maintain its local finite-time stability regardless of some nonlinear perturbations. Thus, our control law actually applies to a large class of nonlinear second order systems.
Commercial Banks and Value Relevance of Derivative Disclosures after SFAS 133: Evidence from the USA

In the last decade there has been a significant increase in the use of derivatives as a vehicle to manage financial risk. The sudden spurt of derivatives has resulted in the Financial Accounting Standards Board (FASB) being forced to develop new standards for quantification and disclosure. The financial standard of interest to this study is Statement of Financial Accounting Standards (SFAS 133). SFAS 133 requires all derivatives, without exception and regardless of the accounting treatment for the underlying asset, liability, or transaction, to be recognized in the balance sheet as either liabilities or assets. SFAS 133 entitled Accounting for derivative activities and hedging (and SFAS 137, which postponed the implementation of SFAS 133 until June 2000) is different from prior standards in that it requires recognition as opposed to mere disclosure in the notes. The justification given for implementing SFAS 133 was to increase transparency to investors. In this study we empirically investigate this issue with particular focus on whether SFAS 133 provides incremental information above that provided by reported earnings, book value, and proxies for omitted variables. We study commercial banks since they are among the most frequent users of large-scale derivative contracts and their use has increased significantly over the last two decades, and in particular over the last five years. Our findings indicate that information regarding total derivative contracts, when disclosed in the financial statements as required by SFAS 133/137, is value relevant to investors. However, investors view this information negatively, perhaps attributing this to higher risk. Losses on holding derivatives are viewed positively and gains are viewed negatively.
Knuckles: bringing the database to the data

Click-stream data warehousing has emerged as a monumental information management and processing challenge for commercial enterprises. Traditional solutions based on commercial DBMS technology often suffer from poor scalability and large processing latencies. Although click-stream data tends to be collected in a distributed manner to support scaling the servers that host the websites, in general these partitioned click-stream logs are collated and pushed upstream to a centralised database storage repository, creating storage bottlenecks. In this paper, we propose a design of an ad-hoc retrieval system suitable for click-stream data warehouses, in which the data remains distributed and database queries are rewritten to be executed against the distributed data. The query rewrite does not involve any centralised control and is therefore highly scalable. The elimination of centralised control is achieved by supporting a restricted subset of SQL, which is sufficient for most click-stream data analysis. Evaluations conducted using both synthetic and real data establish the viability of this approach.
Common and Variable Contributions of Fis Residues to High-Affinity Binding at Different DNA Sequences

ABSTRACT Fis is a nucleoid-associated protein that interacts with poorly related DNA sequences with a high degree of specificity. A difference of more than 3 orders of magnitude in apparent Kd values was observed between specific (Kd , ∼1 to 4 nM) and nonspecific (Kd , ∼4 μM) DNA binding. To examine the contributions of Fis residues to the high-affinity binding at different DNA sequences, 13 alanine substitutions were generated in or near the Fis helix-turn-helix DNA binding motif, and the resulting proteins were purified. In vitro binding assays at three different Fis sites (fis P II, hin distal, and λ attR) revealed that R85, T87, R89, K90, and K91 played major roles in high-affinity DNA binding and that R85, T87, and K90 were consistently vital for binding to all three sites. Other residues made variable contributions to binding, depending on the binding site. N84 was required only for binding to the λ attR Fis site, and the role of R89 was dramatically altered by the λ attR DNA flanking sequence. The effects of Fis mutations on fis P II or hin distal site binding in vitro generally correlated with their abilities to mediate fis P repression or DNA inversion in vivo, demonstrating that the in vitro DNA-binding effects are relevant in vivo. The results suggest that while Fis is able to recognize a minimal common set of DNA sequence determinants at different binding sites, it is also equipped with a number of residues that contribute to the binding strength, some of which play variable roles.