Miracle-dz/UniFAR-FTUs huggingface dataset:
Active damping techniques for LCL-filtered inverters-based microgrids

LCL-type filters are widely used in grid-connected voltage source inverters, since it provides switching ripples reduction with lower cost and weight than the L-type counterpart. However, the inclusion of LCL-filters in voltage source inverters complicates the current control design regarding system stability issues; because an inherent resonance peak appears due to zero impedance at that resonance frequency. Moreover, in grid-interactive low-voltage microgrids, the interactions among the LCL-filtered-based parallel inverters may result in a more complex multi-resonance issue which may compromise the power quality and stability of the microgrid. Therefore, due to the effect of resonances on the system stability and power quality, this paper presents a state-of-the-art review of resonance characteristics and related issues in single- and multi-inverter-systems. Furthermore, this paper introduces the different active damping approaches for grid-connected inverters with LCL filters, which are based on high-order filters and additional feedbacks methods. These techniques are analyzed and discussed in detail.
Analysis of Electron Mobility in Inversion-Mode {Al}_{2}{O}_{3}/{In}_{x}{Ga}_{1 - x}{As} MOSFETs

The electron mobility in Al2O3/InxGa1−xAs (x = 0.53, 0.65, or 0.75) metal–oxide–semiconductor field-effect transistors was analyzed for scattering by oxide charge, as well as interface charge and roughness, and compared with measured transfer characteristics from depletion to inversion. The analysis showed that, under strong inversion, the electron mobility was mainly limited by interface roughness. The extracted interface roughness from the measured data was two to seven times that of the interface between a high-k dielectric and Si, assuming the correlation lengths were comparable. Therefore, to fully benefit from the high bulk mobility of InGaAs, its interface roughness with the gate oxide needs to be further improved.
Instruction-Level Parallel Processing

The performance of microprocessors has increased steadily over thepast 20 years at a rate of about 50% per year. This is the cumulative result of architectural improvements as well as increases in circuit speed. Moreover, this improvement has been obtained in a transparent fashion, that is, without requiring programmers to rethink their algorithms and programs, thereby enabling the tremendous proliferation of computers that we see today. To continue this performance growth, microprocessor designers have incorporated instruction-level parallelism (ILP) into new designs. ILP utilizes the parallel execution ofthe lowest level computer operations—adds, multiplies, loads, and so on—to increase performance transparently. The use of ILP promises to make possible, within the next few years, microprocessors whose performance is many times that of a CRAY-IS. This article provides an overview of ILP, with an emphasis on ILP architectures—superscalar, VLIW, and dataflow processors—and the compiler techniques necessary to make ILP work well.
Characterization of genes that are synthetically lethal with ade3 or leu2 in Saccharomyces cerevisiae

Combinations of two non‐lethal mutations that result in cell death are synthetically lethal. Such a genetic relationship suggests a functional interaction between the corresponding gene products. Frequently, an ade2 ade3 colony‐sectoring assay is used to screen for synthetic lethal mutants. In these screens, mutants are sought that fail to lose a plasmid that bears a gene of interest. However, a subset of mutants is often found that is dependent on plasmid components other than the target gene. To understand the mechanism of this dependence, we characterized those mutants that, although prevalent in most mutant hunts, are usually discarded. Using a LEU2–ADE3 plasmid, plasmid‐dependent mutations were found in the SHM2, PTR3, BAP2 and SSY1 genes. Double shm2 ade3 mutants are non‐viable because the two pathways for tetrahydrofolate synthesis are blocked. Mutations in PTR3, BAP2 and SSY1 disrupt sensing and transport of extracellular leucine. Therefore, ptr3, bap2 or ssy1 mutants must be leucine prototrophs to grow on rich media. In light of these findings, we propose modifications that should improve the efficiency of synthetic lethal screening procedures. Copyright © 2002 John Wiley & Sons, Ltd.
Statistical Extraction and Visualization of Topics in the Qur'an Corpus

Unsupervised machine learning techniques are described and applied on the mildly preprocessed Arabic text of the Holy Qur’an, with promising results. Topic modelling based on nonnegative matrix factorization was used to successfully extract meaningful topics underlying the set of 6236 verses in the corpus. Data visualization using t-SNE dimensionality reduction correctly grouped verses of the Holy Qur’an into clusters based on theme and word usage. This accessible paper begins with an introductory view of machine learning, and includes motivating descriptions of the implemented techniques before presenting a summary of findings. A graphical display combining the results of topic modelling and data visualization demonstrates the consistency of the studied models.
Prevalence of Flp Pili-Encoding Plasmids in Cutibacterium acnes Isolates Obtained from Prostatic Tissue

Inflammation is one of the hallmarks of prostate cancer. The origin of inflammation is unknown, but microbial infections are suspected to play a role. In previous studies, the Gram-positive, low virulent bacterium Cutibacterium (formerly Propionibacterium) acnes was frequently isolated from prostatic tissue. It is unclear if the presence of the bacterium represents a true infection or a contamination. Here we investigated Cutibacterium acnes type II, also called subspecies defendens, which is the most prevalent type among prostatic C. acnes isolates. Genome sequencing of type II isolates identified large plasmids in several genomes. The plasmids are highly similar to previously identified linear plasmids of type I C. acnes strains associated with acne vulgaris. A PCR-based analysis revealed that 28.4% (21 out of 74) of all type II strains isolated from cancerous prostates carry a plasmid. The plasmid shows signatures for conjugative transfer. In addition, it contains a gene locus for tight adherence (tad) that is predicted to encode adhesive Flp (fimbrial low-molecular weight protein) pili. In subsequent experiments a tad locus-encoded putative pilin subunit was identified in the surface-exposed protein fraction of plasmid-positive C. acnes type II strains by mass spectrometry, indicating that the tad locus is functional. Additional plasmid-encoded proteins were detected in the secreted protein fraction, including two signal peptide-harboring proteins; the corresponding genes are specific for type II C. acnes, thus lacking from plasmid-positive type I C. acnes strains. Further support for the presence of Flp pili in C. acnes type II was provided by electron microscopy, revealing cell appendages in tad locus-positive strains. Our study provides new insight in the most prevalent prostatic subspecies of C. acnes, subsp. defendens, and indicates the existence of Flp pili in plasmid-positive strains. Such pili may support colonization and persistent infection of human prostates by C. acnes.
Risk Perception and Correlates of Tobacco Use among Young People Outside of Formal School Settings in Lagos State, Nigeria.

BACKGROUND Tobacco use among youth is a major public health problem. Youth outside of formal school settings are often understudied but may be at increased risk. MATERIALS AND METHODS A descriptive cross- sectional study was carried out among 326 young people aged 15-24 years in four randomly selected motor parks in Lagos state. Interviewer-administered questionnaires were used to collect data. RESULTS The mean age of the respondents was 21.0±2.3yrs. Many 252 (77.3%) dropped out before the end of the third year of secondary schooling. The majority were aware that active (78.2%), and passive smoking (77.3%) are harmful to health. Nearly two-thirds of the respondents disagreed with an outright ban of cigarettes (63.2%) and restriction of cigarette sales to persons below 18 years (67.9%) while 254 (66.8%) supported a ban on tobacco smoking in enclosed public places. One hundred and fifty (46.0%) respondents had experimented with smoking of which 106 (32.5%) had progressed to become current smokers. Half of the current smokers, 54 (50.9%), felt the need for a cigarette first thing in the morning. A multivariate analysis for smoking initiation, showed that for every increasing year of age, respondents were 1.08 times more likely to have initiated cigarette smoking; males and respondents who lived alone or with peers were 2.34 times and 1.77 times more likely to have initiated smoking respectively; those who consume alcohol and marijuana were 7.27 and 1.89 times respectively more likely to have initiated smoking while those who consumed alcohol were 6.17 times more likely to be current smokers.
Single case research method to understand user experience in online stock braking

A single-case research method was chosen to explore further the user experience in online stock trading. This research focuses on part-time online stockbrokers. The study discusses the experiences of traders when conducting online stock trading and links it with the attributes of the user experience. The results of the study highlight that a significantly positive experience when executing online stock trading will influence users to use online stock trading in the future. It is envisaged that the discussion of the results and user experience attributes will enrich the knowledge of the online stock trading system, as well as the design of large-scale Web sites where effective and efficient system usage in relation to locating information is key to user success.
COMMUNICATION USING AN UNDERWATER SONAR

The oceans are considered to host a substantial part of human and industrial resources, namely oil and gas, whose industry will move to ever deeper waters, and where renewable energy continue to be harvested from the seas in offshore wind farms, but also increasingly through tidal, currents and wave energy converters. Furthermore, minerals such as cobalt, nickel, and copper, rare earth, silver and gold will be mined from the sea floor (deep sea mining). To this end, new offshore and port infrastructure will need to be built, monitored and maintained or repaired. Many offshore operations can be carried out by professional divers, sometimes in dangerous missions. The dependency on such kind of work represents an actual threat to the offshore industry. The extensive use of unmanned underwater vehicles (AUVs/ROVs) could solve this problem. However, such vehicles are usually customized only for performing specific tasks and are difficult to operate. This typically makes their deployment rather expensive. ” [1] Out of this SWARMs targeted five main objectives: 1. To develop an environment characterization and coordination system 2. Design the necessary infrastructure for monitoring and controlling underwater industrial operations 3. Apply communication concepts ensuring smooth functioning while also exploring new, innovative technologies 4. Define and apply a methodology for designing new operations 5. Test, validate and demonstrate the SWARMs platform solution in relevant and environmentally controlled scenarios This thesis will be about to establish wireless communication with the sonar, underwater wireless communication. In that environment it is a lot of disturbance noise, inter-symbol interference (ISI), the impact of the Doppler effect and it is low bandwidth and all these parameters affect the communication and the ability of transmitting data [2][3][4].
Realization of distributed formation flying using a group of autonomous quadcopters and application to visual performance show

In this paper, we introduce outdoor multi-drone platform which is supposed to be used for several purposes. The main application of the platform in this paper is a visual performance show called “the memory of fireflies. ” We explain the process of modification of the pure drone frame for our purpose and control algorithm for achieving the desired performance. Due to inaccuracy of the positioning data of the drones in outdoor environments, the performance should be constrained compared to the cases of indoor environments. We show how we generate desired trajectories that satisfy the constraints due to the capacity of the drones.
Trajectory tracking control of a four-wheel differentially driven mobile robot

We consider the trajectory tracking control problem for a 4-wheel differentially driven mobile robot moving on an outdoor terrain. A dynamic model is presented accounting for the effects of wheel skidding. A model-based nonlinear controller is designed, following the dynamic feedback linearization paradigm. An operational nonholonomic constraint is added at this stage, so as to obtain a predictable behavior for the instantaneous center of rotation thus preventing excessive skidding. The controller is then robustified, using conventional linear techniques, against uncertainty in the soil parameters at the ground-wheel contact. Simulation results show the good performance in tracking spline-type trajectories on a virtual terrain with varying characteristics.
Human Bocavirus Infection in Children with Acute Respiratory Infection in Nairobi, Kenya

Background: Acute respiratory infection (ARI) is a leading cause of morbidity and mortality in children under five years of age in developing countries with viruses contributing significantly to this problem. The recently identified parvovirus, Human Bocavirus (HBoV), has also been associated with ARI. Objective: To determine the frequency of HBoV in patients with ARI. Materials and Methods: Samples from 125 consenting patients with influenza like illness signs and symptoms were collected. DNA was extracted from these samples using the QIAamp DNA blood mini kit (Qiagen, Germany). Conventional PCR was carried out and the amplicons were examined in 2% agarose gels stained with ethidium bromide. This was followed by sequencing of the HBoV positive samples. Results: Twenty one (16.8%) patients were found to have HBoV infection. Males (n = 61.9%) were mainly infected with HBoV. Local HBoV strains had 98.9% - 100% similarities and were found to cluster together with other strains obtained elsewhere. Conclusion: These findings suggest that HBoV plays a role in respiratory tract infections in children in Kenya just like it has been found elsewhere. It also sheds light on multiple infections associated with HBoV infections in Kenya.
Analysis of the genetic requirements for viability of Escherichia coli K-12 DNA adenine methylase (dam) mutants

RecBCD protein, necessary for Escherichia coli dam mutant viability, is directly required for DNA repair. Recombination genes recF+, recN+, recO+, and recQ+ are not essential for dam mutant viability; they are required for recBC sbcBC dam mutant survival. mutH, mutL, or mutS mutations do not suppress subinduction of SOS genes in dam mutants.
SmartCuckoo: A Fast and Cost-Efficient Hashing Index Scheme for Cloud Storage Systems

Fast query services are important to improve overall performance of large-scale storage systems when handling a large number of files. Open-addressing cuckoo hash schemes have been widely used to support query services due to the salient features of simplicity and ease of use. Conventional schemes are unfortunately inadequate to address the potential problem of having endless loops during item insertion, which degrades the query performance. To address the problem, we propose a cost-efficient cuckoo hashing scheme, named SmartCuckoo. The idea behind SmartCuckoo is to represent the hashing relationship as a directed pseudoforest and use it to track item placements for accurately predetermining the occurrence of endless loop. SmartCuckoo can efficiently predetermine insertion failures without paying a high cost of carrying out step-by-step probing. We have implemented SmartCuckoo in a large-scale cloud storage system. Extensive evaluations using three real-world traces and the YCSB benchmark demonstrate the efficiency and efficacy of SmartCuckoo. We have released the source code of SmartCuckoo for public use.
Social engineering: assessing vulnerabilities in practice

– The purpose of this paper is to investigate the level of susceptibility to social engineering amongst staff within a cooperating organisation. , – An e‐mail‐based experiment was conducted, in which 152 staff members were sent a message asking them to follow a link to an external web site and install a claimed software update. The message utilised a number of social engineering techniques, but was also designed to convey signs of a deception in order to alert security‐aware users. The external web site, to which the link was pointing, was intentionally badly designed in the hope of raising the users' suspicions and preventing them from proceeding with the software installation. , – In spite of a short window of operation for the experiment, the results revealed that 23 per‐cent of recipients were fooled by the attack, suggesting that many users lack a baseline level of security awareness that is useful to protect them online. , – After running for approximately 3.5 h, the experiment was ceased, after a request from the organisation's IT department. Thus, the correct percentage of unique visits is likely to have been higher. Also, the mailings were sent towards the end of a working day, thus limiting the number of people who got to read and respond to the message before the experiment was ended. , – Despite its limitations, the experiment clearly revealed a significant level of vulnerability to social engineering attacks. As a consequence, the need to raise user awareness of social engineering and the related techniques is crucial. , – This paper provides further evidence of users' susceptibility to the problems, by presenting the results of an e‐mail‐based social engineering study that was conducted amongst staff within a cooperating organisation.
Anxiety, Depression, and Coping Skills Among Mexican School Children

The purpose of this study was to compare severity and risk status for anxiety and depression with coping skills among 130 Mexican school children with learning disabilities (LD) and 130 school children without LD. This research is the first to explore the emotional difficulties of Mexican children with LD. Children completed the Spanish version of the Spence Children’s Anxiety Scale and Children’s Depression Inventory, and the Cuestionario de Afrontamiento (Coping Skills Questionnaire). Results indicated that a higher percentage of children with LD were at risk for anxiety (22.3% vs. 11.5%) and depression (32% vs. 18%). No statistically significant differences were found for coping skills. Results support the idea that there is an increased awareness of comorbid depression and anxiety among students with LD and a need to promote early identification and intervention in schools. Efforts should focus on better understanding the relationship between social-emotional difficulties and academic achievement and on developing effective interventions to support children with LD.
Clock domain crossing formal verification: a meta-model

In the context of industrial designs, circuits are based on many IPs defined on their own clock domain. It leads to globally asynchronous locally synchronous designs. The transmission of data between clock domains must be carefully verified to avoid metastability, inconsistency and data loss. EDA tools propose a strategy based on a minimal detection of a synchronizer structure. Conversely, in this paper we propose a meta-model of synchronizer that speeds up the proof and ensures its better automation.
A study of the clinical test of sensory interaction and balance.

BACKGROUND AND PURPOSE The ability to maintain an upright position during quiet standing is a useful motor skill. The Clinical Test of Sensory Interaction and Balance is an inexpensive, easily administered test that provides information about the ability to stand upright under several sensory conditions. SUBJECTS Three groups of neurologically asymptomatic (AS) adults, divided by age into younger, middle-aged, and older groups, participated in the study. A fourth group comprised subjects diagnosed with vestibular disorders. METHODS Timed performances under six different conditions were compared across groups. RESULTS Subjects with vestibular disorders were significantly impaired on performance when compared with age-matched AS subjects. Older AS and vestibularly impaired subjects had greater variation in their scores than did younger AS subjects. CONCLUSION AND DISCUSSION This test is a useful screening tool for examining static standing balance.
A novel insertion element from Mycobacterium avium, IS1245, is a specific target for analysis of strain relatedness

The insertion sequence IS1245 is a novel mycobacterial repetitive element identified in Mycobacterium avium. It encodes a transposase which exhibits a 64% amino acid similarity with IS1081, an insertion element present in the M. tuberculosis complex. The host range of IS1245 appears limited to M. avium as this element was not identified in M. intracellulare or in any other of 18 mycobacteria species tested. When IS1245 was used for restriction fragment length polymorphism (RFLP) analysis, human isolates characteristically presented a high number of copies (median, 16; range, 3 to 27) and a diversity of RFLP patterns comparable to that found by pulsed-field gel electrophoresis. Isolates from nonhuman sources differed both in number of copies and in RFLP pattern diversity: while swine isolates shared the characteristics of human strains, those from several avian sources exhibited a very low copy number of IS1245 and appeared clonal on the basis of RFLP.
Playful Crowdsourcing for Energy- Efficient Automotive Navigation

In this paper, we describe the work-in-progress state of a playful simulation using crowdsourcing to gather data of efficient routes for automotive navigation in the context of electro mobility. Users will contribute well-known routes of their local area by playing the simulation. The routes will be evaluated with regard to height structure, traffic volume, and traffic signal frequency in the context of the daytime, season, and further time-dependent events. Based on this data, the simulation will be able to calculate the most energy-efficient route.