Miracle-dz/UniFAR-FTUs huggingface dataset:
Smart multi-level energy management algorithm for grid-connected hybrid renewable energy systems in a micro-grid context

The intermittency of single renewable energy sources affects significantly their reliability, and hence, hybrid renewable energy systems (HRESs) are introduced. HRESs are notably used to meet the needs of residential loads. Nevertheless, power surplus and shortages still represent issues that must be handled by energy management systems. In this paper, a novel method for optimal energy management of a grid connected micro-grid composed of five smart Moroccan prosumers is presented. The proposed energy management strategy is organized using three levels, namely, HRES level, load-scheduling level, and communication-sharing level between HRESs. The first two levels of energy management are processed at the local level, i.e., inside each smart home. For the third level, our paper demonstrates the feasibility of interactions and communication between the five different houses interconnected using an optimized infrastructure topology as a smart neighborhood grid. Each of these houses is empowered by their own hybrid renewable energy system made of possible system hybridization based on PV (Photovoltaic), wind turbine, and battery storage system. This helps each house to manage its surplus and to deal with energy shortage through the proposed multi-level system's energy management algorithm. The application of information and communication technologies enables the set of smart homes connected in a micro-grid framework to contribute to the emergence of the concept of the internet of sustainable green things. Simulations conducted by the MATLAB platform validate the proposed methodology, which relies on micro-grid surplus injection and neighborhood storage during extreme surplus, else load dynamics thereafter micro-grid-injected energy recovering during hybrid energy deficit. The proposed system manages the energy produced by HRESs and reduces the energy demanded by the utility grid using the proposed topology that connects houses and ensures interactions between the micro-grid and the utility. The results show that the frequency of micro-grid deficiency was significantly reduced due to the established micro-grid with the five houses according to the proposed topology and the developed multi-level management system.
The impact of ownership structure on corporate performance (business -operating result) of listed companies on Ho Chi Minh Stock Exchange – A comparison the period 2006-2008 vs 2015-2017 – 10 years overview

This research studies the relationship between equity structure and business performance/ operating results of listed companies on HOSE for three years 2015, 2016, and 2017. This is not only an important aspect of corporate governance but also more important for companies operating in the form of a joint-stock company. The author uses the Enterprise Management System theory and references Xu and Wang's research model applied to Chinese joint-stock companies (1997). The used data is secondary data including indicators showing the company's business results (ROA, ROE, P/B) and equity ratios of shareholders (ownership concentration, ownership components). The research method was performed by regression analysis using SPSS software, in which the dependent variables are indicators of the company's business results, the main independent variables represent the equity structure. After analyzing data, the study has drawn two main results. The first result is that the ownership component of individuals (personal) hurts on the business performance of companies, in contrast to the fraction of equity owned by state and equity owned by legal person/institution (organizational entities) do not have any influence on the linear correlation. The second result is the concentration of ownership has no relation to the business performance of companies. With the above results, this topic can be studied more extensively for all types of other ownership such as domestic shareholders and foreign shareholders; due to both two types increasingly essential for companies and investors in the joint-stock market.
“El oriente de Cali no tiene ni Dios ni ley”: redes sociales digitales y violencia racializada a propósito de la COVID-19

To speak of the quarantine due to COVID-19 in Cali is to refer to a period of social isolation in a city with unequal socioeconomic conditions; with narratives that show the black and black inhabitants of the Aguablanca District as responsible for the high homicide rates, generating a direct relationship between the social category of race and the violence from which the vulnerabilities of this community are increased, such as present Alves (2014, 2017) and Moreno and Mornan (2015). This article describes how racialized violence reproduces vulnerabilities in the Aguablanca District during the isolation caused by COVID-19. A digital ethnography is carried out, based on the proposals of Hine (2004, 2009), in five profiles of digital social networks with news themes, and semi-structured interviews with administrators of the profiles and inhabitants of Cali. The analysis shows how in the narrative / news texts used to report on the behavior of the city during isolation, the references “Oriente” and “Distrito de Aguablanca” trigger violent and racist demonstrations against their community, identified as responsible for the harmful effects of the pandemic. The condition of migrant stands, at a social level, as a sufficient variable to be marked as disorderly and dangerous in times of quarantine. Skin color and geographic location become catalysts for narratives and social representations that deny the spatial and symbolic belonging of the inhabitants of the Aguablanca District to the city in times of COVID-19.
Molecular characterization, expression pattern and ligand‐binding properties of the pheromone‐binding protein gene from Cyrtotrachelus buqueti

Pheromone‐binding proteins (PBPs) play important roles in the information exchange between insect sexes, specifically in the process of transporting fat‐soluble odour molecules from the external environment to olfactory receptors through the olfactory sensillum lymph. The PBP functions in this process may explain the sex pheromone identification mechanism used by insects, laying a theoretical foundation for the prevention and control of pests by interfering with olfactory recognition. In the present study, a PBP gene of Cyrtotrachelus buqueti (GenBank accession number: KU845733) is cloned for prokaryotic expression. Using N‐phenyl‐1‐naphthylamine as the fluorescent probe in a competitive binding assay, the ability of CbuqPBP1 to bind 12 sex pheromone analogues and three volatiles of Neosinocalamus affinis shoots is examined. Of the 12 C. buqueti sex pheromone analogues, dibutyl phthalate gives the greatest displacement (inhibitory constant value of 11.1 μm), whereas the other sex pheromone components show much smaller displacements. Consistent with other PBPs, the three plant volatiles (linalool, benzaldehyde and indole) show only a limited displacement of CbuqPBP1. However, the binding abilities of 1 : 1 ratios of each of the three plant volatiles with dibutyl phthalate show increases of 62.3%, 65.1% and 51.7% over the binding abilities of the three plant volatiles alone. CbuqPBP1 has dual roles in the processes of sensing sex pheromones and plant volatiles.
Ultrastructural and morphometric study of the pineal complex in indian major carp Catla catla in response to continuous light and darkness (vol 9, pg 1, (2005)

Pregnane and Xenobiotic Receptor (PXR) is a member of the nuclear receptor super-family of ligand-regulated transcription factors. Some of its key roles in normal physiological controls and patho-physiological situations are recently becoming more apparent. PXR responds to a large range of chemically distinct endobiotics (steroids, bile acids and their derivatives, vitamins, etc.) and xenobiotics (synthetic drugs, herbal medicines, endocrine disrupters, etc.). As a result of its chemical sensory capabilities and gene modulatory functions in controlling cellular detoxification pathways, PXR has been appropriately termed by some as a 'xenosensor' or 'master regulator'. The present review focuses on two facets of this unique receptor. First, its function in maintaining homeostasis that primarily involves rapid and timely elimination of toxic endogenous metabolites and exogenous chemicals. Second, its involvement in dysregulated metabolic conditions (such as osteomalacia) and certain chronic diseases like cancer. When PXR encounters circumstances that are discordant with normal homeostasis, it orchestrates a response by utilizing and modulating the components of the central detoxification defense machinery, i.e. phase I and phase II drug metabolizing enzymes, as well as drug transporters. The presence of PXR in tissues other than the expected ones (liver and intestine) along with the occurrence of various isoforms (three or more) indicates much more diverse roles for this receptor than previously suspected. The possibility of the presence of various PXR isoforms in different tissues suggests utilization of combinatorial mechanisms to regulate different sets of genes under varied physiological and pathogenic conditions. Further studies are expected to divulge important roles of PXR in drug-drug interactions, development of several metabolic disorders and in designing safer therapeutic molecules.
GC–MS ANALYSIS OF ANTIFUNGAL COMPOUNDS DERIVED FROM SOIL ACTINOBACTERIA

This study was aimed to evaluate the antifungal property of actinobacterial strain isolated from rhizosheric soil and its compounds analysis through GCMS. A total of 16 Actinobacterial strains were isolated and screened on the basis of their efficiency to inhibit the growth of fungal pathogen Fusarium oxysporum. The secondary metabolites from the active strain (Streptomyces werraensis KBR01) were extracted using different organic solvents and subjected to disc diffusion test to check their efficacy against fungal pathogen. The presence of active compounds was confirmed by gas chromatography-mass spectrometry (GC-MS) analysis which revealed the presence of different types of compounds like fatty acid methyl ester (6,9,12Octadecatrienoic acid, methyl ester, 36.02%), long chain alkanes (Dodecane, 29.47%), fatty alcohol (2pentadecanol, 13.72%), piperazinedione (2,5Piperazinedione, 3,6-bis(2-methylpropyl), 8.28%), esters (dodecyl acrylate, 8.29%) and pyrrolizidine (Pyrrolo[1,2a]pyrazine-1,4-dione, Hexahydro-, 2.8% and Pyrrolo [1,2-a]pyrazine-1,4-dione, Hexahydro-3-(2-methylpropyl), 1.4%). Presence of many antimicrobial compounds in the crude extract of Streptomyces werraensis KBR01 advocates the antimicrobial potency of this strain.
Light-time effect detected in fourteen eclipsing binaries

The available minima timings of 14 selected eclipsing binaries (V1297 Cas, HD 24105, KU Aur, GU CMa, GH Mon, AZ Vel, DI Lyn, DK Her, GQ Dra, V624 Her, V1134 Her, KIC 6187893, V1928 Aql, V2486 Cyg) were collected and analyzed. Using the automatic telescopes, surveys, and satellite data, we derived more than 2500 times of eclipses, accompanied with our own ground-based observations. These data were used to detect the period variations in these multiple systems. The eclipse timing variations were described using the third-body hypothesis and the light-time effect. Their respective periods were derived as 2.5, 16.2, 27, 20, 64, 5.6, 22, 115, 27, 42, 6.9, 11.2, 4.1, and 8.4 years for these systems, respectively. The predicted minimal mass of the third body was calculated for each of the systems, and we discuss here their prospective detectability. The light curves of HD 24105, GH Mon, DK Her, V1134 Her, KIC 6187893, V1928 Aql, and V2486 Cyg were analyzed using the PHOEBE program, resulting in physical parameters of the components. Significant fractions of the third light were detected during the light-curve analysis, supporting our hypothesis of the triple-star nature of all these systems. The majority of these systems (nine out of 14) were already known as visual doubles. Our study shifts them to possible quadruples, what makes them even more interesting.
Photon-Detection Timing-Jitter Model in Verilog-A

Single-photon avalanche diodes can be employed to register the arrival of an individual photon. They are biased beyond breakdown voltage, and thus the electron-hole pairs generated by any incident photon is accelerated by the strong electric field triggering an avalanche current. In recent years, there have been attempts to model its characteristics in Verilog-A HDL. However, none of them have modelled its photon-detection timing jitter. This paper explains the mechanism of avalanche triggering and proposes a first approach to model it in Verilog-A. Comparison with experimental data and data reported in literature validates the model.
Self-regulated learning with massive open online course (MOOC) for the fundamentals of data structure course: A descriptive analysis

Data structure is a foundation subject for computer science students in Malaysian universities. To fully grasp the subject, students are required to do a lot of exercises. Many students, however, are lacking the motivation to either carry out the exercises or to actively participate in the teaching and learning process. As a result, they find it difficult to internalize the concepts and master the programming skills. Consequently, students tend to perceive data structure as a difficult subject. The objective of this paper is to present the implementation of Massive Open Online Course (MOOC) in teaching the subject of Fundamentals of Data Structures. It was anticipated that the MOOC would facilitate the students in self-regulated learning (SRL), thus increasing their motivation and participation. The MOOC has been used by the Diploma of Computer Science students in Universiti Teknologi MARA, Perak Branch from September to December 2019. The students’ perception on MOOC and its effect to six SRL attributes has been collected through an online survey at the end of academic semester. The result was very encouraging as it shows that the MOOC has contributed positively to the students’ SRL notably in the area the self-defined goal setting, self-efficacy, self-interest and self-strategies.
Comparative Analysis of Optical Radiation Emitted by Electric Arc Generated at AC and DC Voltage

The article presents a comparison of the spectra of electromagnetic radiation emitted by an electric arc. The spectrum ranges from ultraviolet through visible light to near infrared. Spectra from electric arcs were compared for different frequencies of generating current and for direct current. Characteristic peaks for each measurement were described, and the percentage of individual components of light emitted through the arc was presented. An electric arc is an undesirable phenomenon in many areas, and its detection and control depends largely on its source. There are also areas where an electric arc is used. A better understanding of the physical phenomena involved in different arcs can help optimize the use of the electric arc. Safety and economy through the elimination of parasitic energy shares i.e., in the welding arc can be based on the control of the arc by controlling its optical spectrum. The optical method used in this study is one of the methods of electrical discharge detection in electrical devices and systems.
Regional‐scale allocation of fast charging stations: travel times and distribution system reinforcements

Electric vehicle (EV) fleet is constantly increasing over the years and higher adoption is expected in the coming decades. A key aspect to support and boost the EV uptake is the adequate availability (number, locations and sizes) of fast charging stations (FCSs) to enable inter-and intra-city travels. Since these studies require modelling large regions with uncertainties, a methodology able to provide the least-cost solution is needed. This study proposes a scalable methodology that integrates high-resolution traffic flow and multi-phase electrical simulations to find the number, locations and sizes of FCSs at the least societal cost considering the uncertainties in driving patterns. It determines potential FCSs locations based on traffic flow and progressively explores these FCSs quantifying capital (equipment and land) and indirect (loss of productivity and reinforcements) costs to identify the least-cost solution. Results from a Brazilian case study comprising of a metropolitan region with six cities and 26 primary substations show that, with high adoption of EVs, the investments in equipment represent the most significant components of societal cost. Moreover, for metropolitan regions, the societal least-cost solution is found with more but smaller FCSs. Finally, is found that neglecting the loss of productivity can significantly affect the results.
foxr1 is a novel maternal-effect gene in fish that regulates embryonic cell growth via p21 and rictor

The family of forkhead box (Fox) transcription factors regulate gonadogenesis and embryogenesis, but the role of foxr1/foxn5 in reproduction is unknown. Evolution of foxr1 in vertebrates was examined and the gene found to exist in most vertebrates, including mammals, ray-finned fish, amphibians, and sauropsids. By quantitative PCR and RNA-seq, we found that foxr1 had an ovarian-specific expression in zebrafish, a common feature of maternal-effect genes. In addition, it was demonstrated using in situ hybridization that foxr1 was a maternally-inherited transcript that was highly expressed even in early-stage oocytes and accumulated in the developing eggs during oogenesis. We also analyzed the function of foxr1 in female reproduction using a zebrafish CRISPR/Cas9 knockout model. It was observed that embryos from the foxr1-deficient females had a significantly lower survival rate whereby they either failed to undergo cell division or underwent abnormal division that culminated in growth arrest at around the mid-blastula transition and early death. These mutant-derived eggs contained a dramatically increased level of p21, a cell cycle inhibitor, and reduced rictor, a component of mTOR and regulator of cell survival, which were in line with the observed growth arrest phenotype. Our study shows for the first time that foxr1 is an essential maternal-effect gene and is required for proper cell division and survival via the p21 and mTOR pathways. These novel findings will broaden our knowledge on the functions of specific maternal factors stored in the developing egg and the underlying mechanisms that contribute to reproductive fitness. Summary sentence The foxr1 gene in zebrafish is a novel maternal-effect gene that is required for proper cell division in the earliest stage of embryonic development possibly as a transcriptional factor for cell cycle progression regulators, p21 and rictor.
Numerical simulation of combined effect of pneumatic breakwater and submerged breakwater on wave damping

ABSTRACT A numerical model was proposed to analyse the combined effect of the pneumatic breakwater and the submerged breakwater for improving the wave damping performance, in which the Reynolds Averaged Navier-Stokes equations combined with the Shear Stress Transport (SST) k-ω turbulence model were adopted to investigate the flow field. A series of existing experiments were applied to validate the numerical model of the pneumatic breakwater and the submerged breakwater. The results indicated that the joint breakwater could dramatically enhance the wave dissipation capacity when the aerial barrier was located behind the submerged breakwater, and the transmission coefficient of the joint breakwater to the long waves could be decreased by 35% compared with the submerged breakwater working alone in some cases.
Crops Breeding Future: Effective Tools towards Promising Advances

Plants have become recently a concern of major priority in scientific research projects, particularly crops, which could influence directly human beings health. That is why crop breeding is highly interesting, and it is urgently required to achieve more advances in this field. In this paper we put a spotlight on the importance of plants breeding as a key to find out effective solutions for certain problems encountered in agriculture and those threatening human health, and we illustrate some examples of promising tools and novel approaches, which will most probably help to achieve new advances in this field towards less costly, more wholesome and safer crops, especially those that are staple foods in many countries, such as rice and wheat. We underline also some challenges and orientations for a fruitful research in developing plant breeding.
Monitoring a newly re-born patient: water quality and cyanotoxin occurrence in a reconstructed shallow Mediterranean lake

Lake Karla (Central Greece) is a unique example - at European scale - of a shallow lake ecosystem that was dried in the 1960s and in 2009 started to be restored. The lake is listed in the network of the Greek protected areas as it is considered a vital aquatic ecosystem, in terms of biodiversity. It has, however, already been adversely affected by both agricultural and industrial land uses in the surrounding area, leading to eutrophication and shifting algal community towards bloom-forming toxic cyanobacterial species. After repeated heavy-blooms, cyanotoxin occurrence and mass fish kills, the local ecosystem management authority has implemented a water quality monitoring program (July 2013 - July 2015) to assess environmental pressures and the response of aquatic biota in the lake. Microscopic, immunological, and molecular techniques combined with physico-chemical parameters, complemented by liquid chromatography tandem mass spectrometry (LC-MS/MS), were used to monitor cyanobacteria blooms and the associated cyanotoxin production from three different sites in Lake Karla and from the adjacent Kalamaki Reservoir. Water quality was also assessed by the structure of benthic invertebrate community on the sediment. Cyanobacteria were the main phytoplankton component, representing more than 70% of the total phytoplankton abundance; dominant taxa belonged to Cylindrospermopsis raciborskii , Limnothrix redekei , Anabaenopsis elenkinii , and Microcystis spp. Euglenophytes ( Euglena ), diatoms ( Nitzschia ), and chlorophytes ( Scenedesmus ) were also important phytoplankton constituents. LC-MS/MS confirmed the co-occurrence of microcystins, cylindrospermopsin, saxitoxin, neo-saxitoxin and anatoxin-a. The occurrence of cyanotoxins in relation to the persistent and dominant cyanobacteria and the impact of cyanobacterial harmful algal blooms on the newly constructed lake along with the land uses and the emergent mitigation measures are discussed.
SISTEMAS AGROFLORESTAIS CAFEEIRO-ARAUCÁRIA E SEU EFEITO NA MICROBIOTA DO SOLO E SEUS PROCESSOS

Os efeitos de sistemas agroflorestais (SAFs) na qualidade do solo têm sido estudados. No entanto, faltam informações sobre o sistema cafeeiro-araucária, presente em alguns ambientes. Com o objetivo de avaliar a qualidade do solo e sua microbiota nesses sistemas e, considerando a existência de SAF de cafeeiro sob dois níveis de sombreamento por araucária (mediano - CSM, intenso - CSI), além do cultivo a sol pleno (CSP), na região sul de Minas Gerais, amostras de solo foram retiradas dessas três subáreas para determinação de atributos químicos, físicos e, principalmente, microbiológicos e bioquímicos (densidade de bactérias e fungos, solubilizadores de fosfato, microrganismos celulolíticos, amonificantes, desnitrificantes, comprimento de micélio extrarradicular total de fungos micorrízicos arbusculares - MAs, densidade de esporos de fungos MAs, porcentagem e intensidade de colonização radicular, carbono da biomassa microbiana, atividade microbiana e quociente metabólico). O sistema agroflorestal cafeeiro-araucária não afetou a distribuição dos grupos microbianos estudados, mas o sombreamento mediano proporcionou maior acúmulo de matéria orgânica no solo, com efeito positivo nos seus atributos físicos e maior formação de micorriza.