Miracle-dz/UniFAR-FTUs huggingface dataset:
Islanding Detection in Unbalanced Distribution Systems with Doubly Fed Induction Generator Based Distributed Generation Using Wavelet Transform

Abstract—A passive islanding-detection technique is proposed in this article for a distribution network with a distributed generation system including a doubly fed induction generator. This method is based on the processing of the measured voltage signals of the distributed generation connecting bus using discrete wavelet transform. Different types of disturbances including faults (single-phase, two-phase, and three-phase) and power quality disturbances (capacitor switching, load switching, and motor starting) are used to discriminate from islanding conditions. A wind turbine equipped with a doubly fed induction generator is considered as the distributed generation source in an unbalanced distribution system. The studied system is simulated with high level of detail in PSCAD/EMTDC software for the purpose of this work. The results of implementing the proposed method verify the high accuracy, reliability, and speed of the proposed islanding-detection approach even with small non-detection zone and the presence of high levels of noise in measured voltage signals.
Gestionar más allá de los Límites de la Empresa Individual: Una Oportunidad Para Obtener Ventajas Competitivas

When customers purchase products, they are bringing a process to a close that had begun days, months or years before and that had started with the raw materials being procured. Up to the point of purchase the whole sequence of activities and all the value added to the product had had to be properly managed. A firm should not lose control over its product until it reaches its final target. Restricting management only to what occurs within the firm therefore very possibly implies that opportunities for gaining sustainable competitive advantages are lost. When the phenomenon of globalization, the rapid developments in technologies, the rise in logistics costs and increased competition are taken into account, it seems clear that organizations are competing less and less between themselves individually, and much more as parts of the supply chains to which they belong. It is for this reason that this paper focuses on analyzing the management of the downstream flows of materials and information from the raw materials supplier right to the final customer and also the returns upstream: Supply Chain Management.
Physicochemical transformation of ZnO and TiO2 nanoparticles in sea water and its impact on bacterial toxicity

Background: The enormous properties of metal oxide nanoparticles make it possible to use these nanoparticles in a wide range of products. As their usage and application continue to expand, environmental health concerns have been raised. In order to understand the behavior and effect of metal oxide nanoparticles in the environment, comprehensive and comparable physicochemical and toxicological data on the environmental matrix are required. However, the behavior and effect of nanoparticles in the real environmental matrix, e.g. sea water, are still unknown. Methods: In this study, the effects of zinc oxide (ZnO) and titanium dioxide (TiO2 ) nanoparticles on the bacteria (gram positive-Bacillus subtilis, Staphylococcus aureus/gram-negative Escherichia coli, and Pseudomonas aeruginosa) in sea water were investigated. Furthermore, to better understand the behavior of the toxicity, surface chemistry, sedimentation, dissolution, particle size, and zeta potential of the nanoparticles dispersed in the sea water matrices were investigated using Fourier-transform infrared spectrometry (FTIR), ultraviolet–visible (UV-VIS) spectrophotometry, graphite furnace atomic absorption spectrometer (GFAAS), and dynamic light scattering (DLS), respectively. Results: The environmental matrix had a significant influence on physicochemical behavior of the tested nanoparticles. Besides, the inhibition of tested bacteria was observed against ZnO and TiO2 nanoparticles in the presence of sea water, while there was no inhibition in the controlled condition. Conclusion: The results demonstrate that surface chemistry with exposure to the sea water can have a significant role on the physicochemical properties of nanoparticles and their toxicity.
Perception neural network versus fuzzy neural network for controlling the inverted pendulum

Fuzzy neural networks (FNN) and other soft computing approaches provide robust and flexible solutions to the design of the industrial control systems. Their main feature is that they do not require a complete mathematical modelling of the controlled planet. However, there is still a problem in guaranteeing the convergence of the learning process as well as the reliability of the proposed solution when it is adapted to real operational situations. The advantages of the perception neural network (PNN) are its learning process which is guaranteed to converge. Besides, it provides multi-resolution approximation of the required function. Based on the sufficiency of the training data, the structure of the PNN is adjusted to represent each non-linear portion in the function surface. In this paper, we examine the capability of the PNN versus FNN in controlling the inverted pendulum. In comparing the performance of the two networks for controlling the inverted pendulum, results showed the accuracy and superiority of PNN over the FNN.
Best Practice of Green Rural Tourism: Lesson from Sangkan Gunung, Karangasem

The objective of this study was to find out the best practice and the factors influence the best practice of Sangkan Gunung rural tourism operator in Karangasem Regency, Bali. The research method employed was structured observation, documents analysis and in depth interview. The findings reveal that, green initiatives help to cut down the running cost and Sangkan Gunung rural tourism adopts the best practice that suit its operation and environment. The Pilot project in Sangkan Gunung rural tourism proposes to regard sustainability issues in the context of rural tourism product quality, integrating sustainability aspects into a running and well recognized rural tourism quality scheme. Promotion of sustainable rural tourism products goes along
The Pots and Potters of Assyria: Technology and Organisation of Production, Ceramic Sequence and Vessel Function at Late Bronze Age Tell Sabi Abyad, Syria

“The Pots and Potters of Assyria” is a comprehensive discussion of all evidence relating to pottery production from the Late Bronze Age site of Tell Sabi Abyad, Syria. Technological, morphological, stylistic and archaeological data are integrated into the understanding of pottery production and use. The pottery itself and its chronological sequence, the shaping and firing techniques, raw materials, wasters and unfired pottery are presented. In addition, workshops and their layout, tools, as well as pottery kilns and their construction are discussed. Together with information on standardization, output and demand, as well as information from contemporary texts, these sources are used to reconstruct the organization of pottery production at the site. A chapter on vessel function and use including a list of Middle Assyrian vessel names concludes the study. Introductory chapters discuss field methodology, the historical background and stratigraphical information. Seven appendices present the database used for this study, the shape typology, a detailed study of the pottery kilns, the results of archaeometric research including thin-section analyses, potters’ marks, and cuneiform texts from Sabi Abyad related to pottery. The thesis is lavishly illustrated, including an extensive catalogue, detailed illustrations of workshops, tools, shaping techniques, kilns, thin-section slides, and vessels in iconography
Improving safety in the chemical laboratory: A practical guide

Organization for Safety in Laboratories Precautionary Labels and Material Safety Data Sheets Doing It Right The 95 Percent Solution Safety Inspections, Safety Audits A Chemical Hygiene Plan: Preparing/Reviewing Flammability, Combustibility Chemical Reactivity: Instability and Incompatible Combinations Toxic Effects of Chemicals Handling and Management of Particularly Hazardous Substances Other Hazards Storage of Laboratory Chemicals Federal Regulations in the United States Safe Disposal of Hazardous Waste Laboratory Regulations in Canada Laboratory Regulations in the United Kingdom Air Monitoring in the Chemical Laboratory Personal Protective Equipment in the Laboratory Designing Safety into the Laboratory Laboratory Hoods Using Audiovisual Materials in Safety Training Laboratory Safety Library Holdings Acronyms Index.
A study of accident rates amongst motorists who passed or failed an advanced driving test

A study has been carried out to measure the extent that a driving test can be used to predict the subsequent accident records of those drivers who pass and those drivers who fail it. The prediction of accidents for groups of drivers through the knowledge of other driver characteristics has also been examined. The test investigated was that of the Institute of Advanced Motorists. Results have indicated that the group of motorists who passed this test had 25 percent fewer accidents over the 3 year period after taking the test than those who failed. This is a statistically significant difference and demonstrates quantitatively that driver testing by subjective methods is a useful road safety measure in that it can successfully identify a group of drivers who will have more accidents. Multivariate analysis has been applied to the various characteristics measured in the survey to find whether the identification of drivers with future good or bad accident records can be made more reliable, and the relevance to testing in general is discussed. /Author/
Wastewater treatment technologies required for current and future regulatory requirements

Cet article fournit une vue d'ensemble sur des sujets d'ordre reglementaire relies au traitement des eaux usees, sur la direction probable que les futures exigences reglementaires vont prendre, et sur toutes nouvelles technologies requises pour satisfaire les exigences anticipees. Des pressions pour des reglements plus stricts gouvernant le traitement des eaux usees viendront probablement d'activistes environnementaux et d'un public inquiet, d'engagements globaux a des initiatives telles que la reduction des gaz a effets de serre ou la reduction de la diminution de l'ozone en haute atmosphere, et d'engagements envers des partenaires commerciaux pour une atmosphere d'equite des controles environnementaux. Les sujets touchent tous les aspects du traitement des eaux usees, incluant les emissions liquides solides et gazeuses. Pour plusieurs problemes, la technologie actuelle va satisfaire les exigences futures anticipees alors que pour d'autres defis, une nouvelle technologie ou une variante economiquement viable d'une technologie actuelle va etre requise. Des technologies economiquement efficaces ameliorees vont etre requises pour reduire les emissions des gaz a effets de serre et createurs de smog provenant d'usines de traitement d'eau usees. La disposition de residus solides provenant d'eau usees va continuer d'etre un des defis les plus significatifs auquel l'industrie fera face. Une des plus granites incertitudes repose dans le developpement de limites reglementaires pour des classes de composes connus comme etant persistants, bio-accumulables, ou des substances toxiques. Puisque les futures limites reglementaires proposees pour ces substances sont incertaines, les technologies requises pour satisfaire ces limites, quelles que soient, sont aussi incertaines.
Risk and Adverse Outcome Factors of Severe Acute Malnutrition in Children: A Hospital-Based Study in Odisha

Background Malnutrition is prevalent in 41% of children less than five years old in developing countries. Objective To determine the clinical spectrum, identify the risk factors, and find out the factors responsible for the adverse outcomes of severe acute malnutrition (SAM) in children. Methods In this prospective cohort, children aged one month to five years with SAM from October 2016 to September 2018 were enrolled. Clinical profile, contributing factors, treatment, and outcome of cases (n=198) were noted. Results SAM was diagnosed in 323 (1.6%) of admitted cases. The unimmunized children were 123 (62.1%). Common co-morbidities were acute gastroenteritis (n=89, 44.9%), respiratory tract infection (n=88, 44.4%), and septicemia (n=54, 26.7%). Children not on exclusive breastfeeding (n=157, 79.1%), early complementary feeding (<6 months) (n=157, 88.2%), bottle-feeding (n=138, 77.55%), low birth weight (157, 79.1%), living in kutcha houses (115, 58.2%), and unavailability of safe drinking water (131, 66.4%) were the significant risk factors. Pneumonia, diarrhea, nutritional edema, hypothermia, and circulatory shock at the time of admission were responsible for adverse outcomes. One hundred and eighty-three (92.4%) children were cured and discharged and 15 (7.6%) children died. Conclusions Wrong feeding practices and unavailability of safe drinking water have an important bearing on the development of SAM children. Pneumonia, diarrhea, nutritional edema, hypothermia, and circulatory shock at the time of admission were responsible for adverse outcomes.
Examining the gaze behaviors of harvester operators: an eye-tracking study

In forest harvesting, operators must visually monitor the terrain, machinery, the stand and the trees they are cutting in order to plan, evaluate and adjust their tasks. To exploit increasing opportunities to automate these tasks and create decision support systems it is essential to understand not only what forestry workers do, but also what they look at and why they focus on specific aspects during specific tasks. This knowledge may also aid operator training and knowledge transfer between age and experience groups. Eye-tracking (ET) is therefore a potentially valuable technique that may facilitate both extraction of implicit knowledge and elucidation of operators’ information acquisition strategies. However, real world ET-recordings are sensitive to environmental variations and analyzing them is time consuming. Thus, the aims of this study were to examine the utility of a head-mounted eye-tracking system in forest harvesting machines in a natural setting and obtain information on operators’ visual behavior (gaze patterns) during harvesting. The output from the eye-tracker was affected by large head movements, changes in illumination and (possibly) vibrations. The gaze pattern analysis revealed that the operators looked at the harvester head or forest most of the time, but their gaze behaviors varied during different harvesting operations. They looked at the monitor, canopy and falling trees less frequently during first thinning than during second thinning and final felling. The results suggest that some harvesting information is gathered in advance to get an overview and plan the work, but most eye movements closely follow actions.
Fronto-temporal functional disconnection precedes hippocampal atrophy in clinically confirmed multi-domain amnestic Mild Cognitive Impairment

Mild Cognitive Impairment (MCI) is fraught with high false positive diagnostic errors. The high rate of false positive diagnosis hampers attempts to identify reliable and valid biomarkers for MCI. Recent research suggests that aberrant functional neurocircuitries emerge prior to significant cognitive deficits. The aim of the present study was to examine this in clinically confirmed multi-domain amnestic-MCI (mdaMCI) using an established, multi-time point, methodology for minimizing false positive diagnosis. Structural and resting-state functional MRI data were acquired in healthy controls (HC, n=24), clinically-confirmed multi-domain amnestic-MCI (mdaMCI, n=14) and mild Alzheimer's Dementia (mAD, n=6). Group differences in cortical thickness, hippocampal volume and functional connectivity were investigated. Hippocampal subvolumes differentiated mAD from HC and mdaMCI. Functional decoupling of fronto-temporal networks implicated in memory and executive function differentiated HC and mdaMCI. Decreased functional connectivity in these networks was associated with poorer cognitive performance scores. Preliminary findings suggest the large-scale decoupling of fronto-temporal networks associated with cognitive decline precedes measurable structural neurodegeneration in clinically confirmed MCI and may represent a potential biomarker for disease progression.
Have British workers lost their voice or have they gained a new one

Over the last two decades, there has been a major switch in British workplaces away from union voice and representative worker voice more generally, towards direct, non-union forms of voice. This paper assesses the implications of this switch for the effectiveness of worker voice, as measured by employee perceptions of managerial responsiveness. In general, perceptions of management are no better among employees with voice than they are among employees with no voice. However, intensive use of direct communication methods improves perceptions of management. Direct voice is particularly effective in a union setting.
Alcune osservazioni sulla forma delle curve di domanda e offerta di capitale

ABSTRACT Some Remarks on the Shape of the Capital Demand and Supply Curves. The present paper is aimed at discussing some results concerning the choice of techniques and the capital theory in order to shed some light on aspects that might cause, and sometimes caused, a misunderstanding. We will show, in particular, that the shape of the demand for capital schedule does not, in general, reveal the presence (or the lack) of phenomena like reverse capital deepening and reswitching. The erroneous belief that the shape of the demand for capital schedule alone were sufficient to foresee possible instability problems seems to come from a conception of capital supply as a given value magnitude, as it is in Wicksell. Therefore, we will argue for the advisability of keeping the difficulties concerning the demand for capital side apart from those concerning its supply side. A method allowing this separation is also provided. Alcune Osservazioni sulla Forma delle Curva di Domanda e Offerta di Capitale. In questo scritto si discutono alcuni risultati riguardanti la scelta delle tecniche e la teoria del capitale con lo scopo di far chiarezza su certi aspetti che potrebbero prestarsi, e talvolta si sono prestati, a fraintendimenti. Si mostrera, in particolare, che la forma della curva della domanda di capitale in valore non e, in generale, rivelatrice della presenza o meno dei fenomeni di inversione dell’intensita capitalistica e ritorno delle tecniche. L’erroneo convincimento che il solo andamento della curva di domanda di capitale sia sufficiente per prevedere possibili problemi di instabilita sembra derivare da una concezione dell’offerta di capitale come un dato ammontare di valore, come in Wicksell. Cosi, si sosterra l’opportunita di tenere distinte le difficolta riguardanti il lato della domanda di capitale, da quelle riguardanti il lato dell’offerta. Si proporra inoltre un metodo che consenta di isolare le prime.
Measures of Association Applied to Operational Risks

Association rules are one of the most popular unsupervised data mining methods (Agrawal et al., 1993; Borgelt et al., 2004; Kenett and Salini, 2008a, 2008b; Roever et al., 2008; Tan et al., 2004). They were developed in the field of computer science and typically used in applications such as market basket analysis, to measure the association between products purchased by consumers, or in web clickstream analysis, to measure the association between the pages seen by a visitor to a site. Sequence rules algorithms are employed to analyse also the sequence of pages seen by a visitor. Association rules belong to the category of local models, that is methods that deal with selected parts of the data set in the form of subsets of variables or subsets of observations, rather than being applied to the whole database. This element constitutes both the strength and the weak point of the approach. The strength is that, in being local, they do not require a large effort from a computational point of view. On the other hand, the locality itself means that a generalization of the results cannot be allowed – not all the possible relations are evaluated at the same time. Mining frequent itemsets and association rules is a popular and wellresearched method for discovering interesting relations between variables in large databases. Piatetsky-Shapiro (1991) describes analysing and presenting
High‐gain broadband patch antenna with a cavity ground for 5‐GHz WLAN operation

A novel broadband patch antenna with an equilateral‐triangular cavity ground for achieving enhanced antenna gain over a large bandwidth is presented. A constructed prototype covering the 5.2/5.8‐GHz (5150–5350/5725–5875 GHz) WLAN bands and showing a high antenna‐gain level of about 9.8 dBi is demonstrated. Across the operating band, the prototype also shows good radiation characteristics with reduced cross‐polarization and backward radiation. Details of the proposed antenna design and obtained experimental results are presented. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 397–399, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20151
Design and Development of MILD Combustion Burner

This paper discussed the design and development of the Moderate and Intense Low oxygen Dilution (MILD) combustion burner using Computational Fluid Dynamics (CFD) simulations. The CFD commercial package was used to simulate preliminary designs for the burner before the final design was sent to workshop for the fabrication. The burner is required to be a non-premixed and open burner. To capture and use the exhaust gas, the burner was enclosed within a large circular shaped wall with an opening at the top. An external EGR pipe was used to transport the exhaust gas which was mixed with the fresh oxidant. To control the EGR and exhaust flow, butterfly valves were installed at the top opening as a damper to close the exhaust gas flow at the certain ratio for EGR and exhaust out to atmosphere. High temperature fused silica glass windows were installed to view and capture images of the flame and analyse the flame propagation. The burner simulation shows that MILD combustion was achieved for the oxygen mole fraction between 3-13%. The final design of the burner was fabricated and ready for the experimental validation.
Surface flashover dynamics in metallized polymer film capacitors

Flashover discharges are one of main failure mechanisms in metallized polymer film capacitors. To study the basic characteristics of surface discharges and their dynamics, an equivalent electric circuit model is developed for metallized polymer film capacitors with the surface discharge modelled with a time-dependent resistor. The discharge resistance is related to the thermal dynamic equation, and as such the heat generated within the capacitor unit can be estimated and subsequently used to assess changes in material properties due to temperature rise. Also discussed are the conditions for propagation of surface discharges and its elongation. For different combination of key system parameters, surface discharges are simulated and this provides insights into factors that influence the growth of surface flashover in metallized polymer film capacitors.