Miracle-dz/UniFAR-FTUs huggingface dataset:
Rotor flux angle tracking controller for sensorless induction motor drives

A controller structure is proposed for the tracking of the rotor flux angle in a speed sensorless induction motor. The method is based on the fundamental-wave induction motor model that is augmented with the mechanical dynamics. A low-frequency current test signal is injected into the stator winding, and the response of the stator voltage is used to produce an error signal that can be controlled to zero by forcing the current signal into the direction of the rotor flux. The validity of the method down to zero stator frequency and speed is confirmed by the results of simulations and experiments.
Empirical Mode Decomposition and Neural Networks on FPGA for Fault Diagnosis in Induction Motors

Nowadays, many industrial applications require online systems that combine several processing techniques in order to offer solutions to complex problems as the case of detection and classification of multiple faults in induction motors. In this work, a novel digital structure to implement the empirical mode decomposition (EMD) for processing nonstationary and nonlinear signals using the full spline-cubic function is presented; besides, it is combined with an adaptive linear network (ADALINE)-based frequency estimator and a feed forward neural network (FFNN)-based classifier to provide an intelligent methodology for the automatic diagnosis during the startup transient of motor faults such as: one and two broken rotor bars, bearing defects, and unbalance. Moreover, the overall methodology implementation into a field-programmable gate array (FPGA) allows an online and real-time operation, thanks to its parallelism and high-performance capabilities as a system-on-a-chip (SoC) solution. The detection and classification results show the effectiveness of the proposed fused techniques; besides, the high precision and minimum resource usage of the developed digital structures make them a suitable and low-cost solution for this and many other industrial applications.
Theory and practice in operating system design

In designing an operating system one needs both theoretical insight and horse sense. Without the former, one designs an ad hoc mess; without the latter one designs an elephant in best Carrara marble (white, perfect, and immobile). We try in this paper to explore the provinces of the two needs, suggesting places where we think horse sense will always be needed, and some other places where better theoretical understanding than we now have would seem both possible and helpful.
Illumination Invariant Face Recognition System

A face recognition system is a computer application for automatically identifying or verifying a person from a digital image . Face recognition techniques have always been a very challenging task in real life applications because of the variation in the illumination, occlusion, facial expression and pose of the face images. This paper presents an efficient illumination invariant face recognition system using Discrete Cosine Transform (DCT) and Principal Component Analysis (PCA). A discrete cosine transform is employed to compensate for illumination variations in the logarithm domain. PCA is used for recognition of face images. Cropped Yale Face B Database with 65 illumination variations is used in this approach. Keywords— Face Recognition, Discrete Cosine Transform (DCT), Principal Component Analysis (PCA), Logarithm transform, Illumination normalization.
Strategic Information Systems Alignment: Alignment of IS/IT with Business Strategy

Using information systems effectively requires an understanding of the organisation, management, and the technology shaping the systems. All information systems can be described as organisational and management solutions to challenges posed by the environment. The advances in information systems have affect on our day-to day lives . As the technology is evolving immensely so are the opportunities in a healthy way to prepare the organisation in the competitive advantage environment In order to manage the IS/IT based systems, it is important to have an appropriate strategy that defines the systems and provide means to manage them. Strategic Information Systems Alignment (SISA) is an effective way of developing and maintaining the IS/IT systems that support the business operations. Alignment of the IS/IT plans and the business plans is essential for improved business performance, this research looks at the key features of SISA in the changing business circumstances in Saudi Arabia.
An Evolutionary Game-Theoretic Model of Revenue Management in Oligopolistic Competition

In this paper we articulate a dynamic model of revenue management where a set of service providers are involved in oligopolistic competition that is equilibrium tending. The service providers are price setters whose price setting strategies induce impacts on demand. The price setting mechanisms of these providers resemble the replicator dynamics that are common to evolutionary games. We show that the resulting Cournot-Nash game takes the form of a differential variational inequality. Existence results are provided and an abstract numerical example is solved via a ﬁxed point algorithm that may be implemented with off-the-shelf NLP software. Suggested extensions of the model are also provided.
Analysing the Floral Elements of the Lost Tree of Easter Island: A Morphometric Comparison between the Remaining Ex-Situ Lines of the Endemic Extinct Species Sophora toromiro

Sophora toromiro (Phil) Skottsb. is a species that has been extinct in its natural habitat Easter Island (Rapa Nui) for over 50 years. However, seed collections carried out before its extinction have allowed its persistence ex-situ in different botanical gardens and private collections around the world. The progenies of these diverse collections have been classified in different lines, most of them exhibiting high similarity as corroborated by molecular markers. In spite of this resemblance observed between the different lines, one of them (Titze) has dissimilar floral elements, thus generating doubts regarding its species classification. The floral elements (wing, standard and keel) belonging to three different S. toromiro lines and two related species were analyzed using geometric morphometrics. This method was applied in order to quantify the floral shape variation of the standard, wing, and keel between the different lines and control species. Geometric morphometrics analyses were able to distinguish the floral elements at both intra (lines) and inter-specific levels. The present results are on line with the cumulative evidence that supports the Titze line as not being a proper member of the S. toromiro species, but probably a hybridization product or even another species of the Edwardsia section. The reintroduction programs of S. toromiro should consider this information when assessing the authenticity and origin of the lines that will be used to repopulate the island.
Exploring the influence of motion boundary sampling to improved dense trajectories for action recognition

This paper addresses the problem of action recognition. Recently, Wang et al. [11] proposed an approach to describe videos by improved dense trajectories (IDT) which has a significant improvement over the state of the art on some realistic data sets with fisher vectors (FVs). However, IDT is very dense and computationally complex for extracting video-level representation. Therefore, we adopt motion boundary sampling to reduce memory and computation cost, and explore how this sampling method influence mean average precision (mAP). We evaluate motion boundary sampling on KTH, Youtube, and HMDB51 dataset, and as a result, the number of the trajectories is significantly reduced compared to IDT. What's more, the performance of this method is similar to IDT with the framework of [14].
Models for thin viscous sheets

Leading-order equations governing the dynamics of a two-dimensional thin viscous sheet are derived. The inclusion of inertia effects is found to result in an ill-posed model when the sheet is compressed, and the resulting paradox is resolved by rescaling the equations over new length-and timescales which depend on the Reynolds number of the flow and the aspect ratio of the sheet. Physically this implies a dominant lengthscale for transverse displacements during viscous buckling. The theory is generalized to give new models for fully three-dimensional sheets.
Mechanisms of glucocorticoid receptor action in noninflammatory and inflammatory cells.

Glucocorticoids exert profound and diverse physiological effects on a wide range of cell types. Produced and released from the adrenal cortex in response to stress, levels of glucocorticoids are under the control of the hypothalamic–pituitary–adrenal axis. Glucocorticoids participate in numerous physiological processes such as glucose homeostasis; protein, lipid, and carbohydrate metabolism; development; neuorobiology; and programmed cell death. Glucocorticoids exert potent immunosuppressive and antiinflammatory actions in a cell type–specific manner largely through the interruption of cytokine-mediated pathways. These antiinflammatory actions are also complemented by the ability of glucocorticoids to induce apoptosis in many cells including thymocytes, blood monocytes, and peripheral T cells. As a class of drugs, glucocorticoids are among the most widely prescribed in the world for the treatment of immune and inflammatory diseases, including asthma, rheumatoid arthritis, ulcerative colitis, and allergic rhinitis. They are also a component of many chemotherapy regimens for the treatment of leukemias, lymphomas, and myelomas because of their role in the induction of apoptosis. However, long-term use of glucocorticoids has been limited by adverse side effects ranging from suppression of the hypothalamic–pituitary axis and growth retardation to osteoporosis, in addition to the development of glucocorticoid resistance. These undesired side effects of glucocorticoids are hypothesized to occur mainly through activation of gene transcription, whereas the beneficial antiinflammatory effects of glucocorticoids involve mainly mechanisms of gene repression. Understanding the molecular basis of glucocorticoid-induced side effects requires an understanding of their actions on homeostatic signaling processes in all cell types. In this review, we discuss the basic cellular and molecular signaling mechanisms of glucocorticoid action during noninflammatory and inflammatory situations. The Glucocorticoid Receptor
Ergonomic requirements for office work with visual display terminals (VDTs) —

Crhistian Michael Ramos Lopez, Jhon Edinson Castro Lopez, Alberto Bravo Buchely, Dayner Felipe Ordoñez Lopez 1,2 Ingeniería Informática, Institución Universitaria Colegio Mayor del Cauca, 3,4 Ingeniero en Electrónica y Telecomunicaciones, Especialista en Educación Virtual, Institución Universitaria Colegio Mayor del Cauca 1 cramos@unimayor.edu. co, 2 julian.mera@campusucc.edu. co, 3 abravo@unimayor.edu. co, 4 dordonezl@unimayor.edu. co
Influence of Lipid-Lowering Therapy on the Progression of Coronary Artery Calcification: A Prospective Evaluation

Background—Coronary calcification measured by fast computed tomography techniques is a surrogate marker of coronary atherosclerotic plaque burden. In a cohort study, we prospectively investigated whether lipid-lowering therapy with a cholesterol synthesis enzyme inhibitor reduces the progression of coronary calcification. Methods and Results—In 66 patients with coronary calcifications in electron beam tomography (EBT), LDL cholesterol >130 mg/dL, and no lipid-lowering treatment, the EBT scan was repeated after a mean interval of 14 months and treatment with cerivastatin was initiated (0.3 mg/d). After 12 months of treatment, a third EBT scan was performed. Coronary calcifications were quantified using a volumetric score. Cerivastatin therapy lowered the mean LDL cholesterol level from 164±30 to 107±21 mg/dL. The median calcified volume was 155 mm3 (range, 15 to 1849) at baseline, 201 mm3 (19 to 2486) after 14 months without treatment, and 203 mm3 (15 to 2569) after 12 months of cerivastatin treatment. The median annualized absolute increase in coronary calcium was 25 mm3 during the untreated versus 11 mm3 during the treatment period (P =0.01). The median annual relative increase in coronary calcium was 25% during the untreated versus 8.8% during the treatment period (P <0.0001). In 32 patients with an LDL cholesterol level <100 mg/dL under treatment, the median relative change was 27% during the untreated versus −3.4% during the treatment period (P =0.0001). Conclusions—Treatment with the cholesterol synthesis enzyme inhibitor cerivastatin significantly reduces coronary calcium progression in patients with LDL cholesterol >130 mg/dL.
Sustained Morphine Exposure Induces a Spinal Dynorphin-Dependent Enhancement of Excitatory Transmitter Release from Primary Afferent Fibers

Paradoxical opioid-induced pain has been demonstrated repeatedly in humans and animals. The mechanisms of such pain are unknown but may relate to opioid-induced activation of descending pain facilitatory systems and enhanced expression and pronociceptive actions of spinal dynorphin. Here, the possibility that these opioid-induced central changes might mediate increased excitability to the spinal cord was tested. Tactile and thermal hypersensitivity was observed at 7, but not 1, days after subcutaneous morphine pellet implantation; placebo pellets produced no effects. Basal and capsaicin-evoked release of calcitonin gene-related peptide (CGRP) was measured in minced spinal tissues taken from naive rats or rats on post-pellet days 1 and 7. The content and evoked release of CGRP were significantly increased in tissues from morphine-exposed rats at 7, but not 1, days after implantation. Morphine increased spinal dynorphin content on day 7 in rats with sham bilateral lesions of the dorsolateral funiculus (DLF) but not in rats with DLF lesions. Pharmacological application of dynorphin A(2–13), a non-opioid fragment, to tissues from naive rats enhanced the evoked release of CGRP. Enhanced evoked release of CGRP from morphine-pelleted rats was blocked by dynorphin antiserum or by previous lesions of the DLF. Sustained morphine induces plasticity in both primary afferents and spinal cord, including increased CGRP and dynorphin content. Morphine-induced elevation of spinal dynorphin content depends on descending influences and enhances stimulated CGRP release. Enhanced transmitter release may allow increased stimulus-evoked spinal excitation, which is likely to be critical for opioid-induced paradoxical pain. Such pain may manifest behaviorally as antinociceptive tolerance.
Avances en el estudio de la personalidad de abusadores sexuales infantiles españoles: una aproximación desde el modelo de los cinco factores

espanolEl objetivo principal de esta Tesis fue examinar los dominios de personalidad del Modelo de los Cinco Factores (MCF) en abusadores sexuales de menores espanoles. Los resultados obtenidos muestran que: los abusadores sexuales de menores espanoles presentan mayor nivel de Neuroticismo y menor nivel de Extraversion que la poblacion general. La historia de abusos en la infancia se relaciona mas que el tipo de delito con las dimensiones del MCF. La cultura parece influir de manera importante en los dominios de personalidad de los abusadores de menores, principalmente en Amabilidad, Apertura y Responsabilidad. Las medidas de funcionamiento ejecutivo son de utilidad para predecir la puntuacion en diferentes dominios del MCF en abusadores de menores. Por lo obtenido puede concluirse que el MCF es un modelo de utilidad para el estudio de la personalidad de abusadores sexuales infantiles espanoles. Estos resultados tienen importantes implicaciones a nivel teorico y practico. EnglishThe main goal of this Thesis was to examine the personality domains of Five Factor Model (FFM) in Spanish child sexual abusers. The obtained results show that: the Spanish child sexual abusers present a higher level of Neuroticism and a lower level of Extraversion than the general population. The childhood abuse history seems to be more closely related to FFM domains than the type of offense. The culture seems have an important impact on the personality domains of child sexual abusers, mainly in Agreeableness, Openness and Conscientiousness. The executive functioning measures are useful for predict scores in different FFM domains of child sexual abusers. In view of the results obtained, it can be concluded that the FFM is an useful model to study the personality of Spanish child sexual abusers. These findings have important implications at the theoretical and practical levels.
Would Cutting Payroll Taxes on the Unskilled Have a Significant Effect on Unemployment

This paper states two recommendations from an OECD Report: (1) "Reduce non-wage labour costs, especially in Europe, by reducing taxes on laboura" (2) "Reduce direct taxes (social security and income taxes) on those with low earningsa". After looking at the first recommendation we conclude that any attempt to generate a significant reduction in the unemployment rate by cutting across-the-board tax rates on employment is likely to fail. We then turn to the second recommendation and give three arguments as to why it may be a good idea. The remainder of the paper investigates the arguments. We look at why the unemployment rate of the unskilled might be higher than that of the skilled, and how we might expect their relative unemployment rates to respond both to relative demand shocks and to more natural shocks. We then examine the facts - what has happened to relative unemployment (and non-employment) rates, and wage rates throughout the OECD. Finally, we discuss the implications of these facts for the proposed policy measures.
Death by a Thousand Facts: Criticising the Technocratic Approach to Information Security Awareness

Purpose – The purpose of this paper is to examine why mainstream information security awareness techniques have failed to evolve at the same rate as automated technical security controls and to suggest improvements based on psychology and safety science.Design/methodology/approach – The concepts of bounded rationality, mental models and the extended parallel processing model are examined in an information security context.Findings – There is a lack of formal methodologies in information security awareness for systematically identifying audience communication requirements. Problems with human behaviour in an information security context are assumed to be caused by a lack of facts available to the audience. Awareness, therefore, is largely treated as the broadcast of facts to an audience in the hope that behaviour improves. There is a tendency for technical experts in the field of information security to tell people what they think they ought to know (and may in fact already know). This “technocratic” view .
Posterior Inference in Bayesian Quantile Regression with Asymmetric Laplace Likelihood

The paper discusses the asymptotic validity of posterior inference of pseudo‐Bayesian quantile regression methods with complete or censored data when an asymmetric Laplace likelihood is used. The asymmetric Laplace likelihood has a special place in the Bayesian quantile regression framework because the usual quantile regression estimator can be derived as the maximum likelihood estimator under such a model, and this working likelihood enables highly efficient Markov chain Monte Carlo algorithms for posterior sampling. However, it seems to be under‐recognised that the stationary distribution for the resulting posterior does not provide valid posterior inference directly. We demonstrate that a simple adjustment to the covariance matrix of the posterior chain leads to asymptotically valid posterior inference. Our simulation results confirm that the posterior inference, when appropriately adjusted, is an attractive alternative to other asymptotic approximations in quantile regression, especially in the presence of censored data.
Protect and serve: Bcl-2 proteins as guardians and rulers of cancer cell survival

It is widely accepted that anti-apoptotic Bcl-2 family members promote cancer cell survival by binding to their pro-apoptotic counterparts, thereby preventing mitochondrial outer membrane permeabilization (MOMP) and cytotoxic caspase activation. Yet, these proteins do not only function as guardians of mitochondrial permeability, preserving it, and maintaining cell survival in the face of acute or chronic stress, they also regulate non-apoptotic functions of caspases and biological processes beyond MOMP from diverse subcellular localizations and in complex with numerous binding partners outside of the Bcl-2 family. In particular, some of the non-canonical effects and functions of Bcl-2 homologs lead to an interplay with E2F-1, NFκB, and Myc transcriptional pathways, which themselves influence cancer cell growth and survival. We thus propose that, by feedback loops that we currently have only hints of, Bcl-2 proteins may act as rulers of survival signaling, predetermining the apoptotic threshold that they also directly scaffold. This underscores the robustness of the control exerted by Bcl-2 homologs over cancer cell survival, and implies that small molecules compounds currently used in the clinic to inhibit their mitochondrial activity may be not always be fully efficient to override this control.
Matrilocality during the prehistoric transition to agriculture in Thailand?

Stable isotopes in teeth are providing important correlations between ancient people and the geographical location of their childhood homes. In an exciting new application, the authors measured the varying signatures of strontium, oxygen and carbon isotopes in the teeth of a sequence of people buried in Thailand during the period of the introduction and intensification of agriculture. Preliminary results point to the arrival of immigrant men, followed by a change in the relationship between the sexes: the women grow up on local food, the men have access to more widespread resources. This perhaps implies a matrilocal system, where forager men raised elsewhere marry into farming communities. It provides a likely antithesis to the social consequences of introducing agriculture into central Europe.
Periodontal Status in Smokers and Nonsmokers: A Clinical, Microbiological, and Histopathological Study

A case-control study was done to assess the influence of smoking on clinical, microbiological, and histopathological parameters. Methods. Two hundred dentate male patients (100 smokers and 100 nonsmokers) ranging between 25 and 50 years were enrolled in the study. Periodontal parameters were recorded. Plaque samples were collected for microbial analysis for BANA test. Gingival biopsies were obtained from selected site for assessing histopathological changes. Results. Both groups showed almost similar plaque levels (P=0.258), but smokers had reduced gingival (0.62 ± 0.31) and bleeding indices (28.53 ± 17.52) and an increased calculus index (1.62 ± 0.36). Smokers had an increased probing depth of 4–7 mm (P=0.009) and overall increased CAL. No difference in microbiota was found between the two groups. Histopathologically smokers showed a decreased blood vessel density (8.84 ± 0.96) and inflammatory cells (52.00 ± 9.79). Conclusions. It is quite possible that many of the pathogenic mechanisms involved in tissue degradation in periodontitis in smokers could be quite different from those in nonsmokers.
A new proof of the four-colour theorem

The four-colour theorem, that every loopless planar graph admits a vertex-colouring with at most four different colours, was proved in 1976 by Appel and Haken, using a computer. Here we announce another proof, still using a computer, but simpler than Appel and Haken’s in several respects.