Miracle-dz/UniFAR-FTUs huggingface dataset:
IMPÉRIO OPACO: MAPEAMENTO DA EXPANSÃO DA REDE BOLSONARISTA NO WHATSAPP

Examinam-se neste trabalho as dinâmicas de estruturacao, manutencao e expansao de grupos politicos de WhatsApp criados para apoiar o presidente Jair Bolsonaro. Entre os dias 1o e 20 de junho de 2019, foram considerados 31 grupos, com um total 3.261 usuarios e 63.709 mensagens. Aponta-se para um “imperio opaco” – estrutura ampla de disseminacao de informacoes, organizada em rede e sem regulacao quanto a natureza do conteudo veiculado, que inclui variadas estrategias de desinformacao. Mesmo apos o periodo eleitoral, tal rede permanece nao apenas atuante, mas em crescimento, em virtude do trabalho de uma elite de usuarios que controla as principais atividades dos grupos. Examinam-se neste trabalho as dinâmicas de estruturacao, manutencao e expansao de grupos politicos de WhatsApp criados para apoiar o presidente Jair Bolsonaro. Entre os dias 1o e 20 de junho de 2019, foram considerados 31 grupos, com um total 3.261 usuarios e 63.709 mensagens. Aponta-se para um “imperio opaco” – estrutura ampla de disseminacao de informacoes, organizada em rede e sem regulacao quanto a natureza do conteudo veiculado, que inclui variadas estrategias de desinformacao. Mesmo apos o periodo eleitoral, tal rede permanece nao apenas atuante, mas em crescimento, em virtude do trabalho de uma elite de usuarios que controla as principais atividades dos grupos.
Organizational culture as correlate of teachers’ job performance and attitude to work in secondary schools in Anambra State Nigeria

The study investigated organizational culture as correlate of teachers’ job performance and attitude to work in secondary schools in Anambra State, Nigeria. Five research questions guided the study and six null hypotheses were tested. The study adopted correlational survey research design. The population of the study comprised all the 6396 teachers in public secondary schools in the state. Out of the population, a sample size of 1279 teachers was drawn through proportionate stratified random sampling techniques. Data was collected using three different questionnaires developed by the researchers. The questionnaires include school organizational culture questionnaire (SOCQ), Teachers’ job performance questionnaire (TJPQ) and Teachers’ attitude to work questionnaire (TAWQ). The instruments were validated by three experts from Faculty of Education Nnamdi Azikiwe University Awka. Cronbach Alpha method was used to determine the reliability of the instruments which yielded a reliability coefficient of . 959, . 957 and 0.701 respectively. The reliability indices were considered high enough and thus the instruments were deemed reliable. Data collection was done by the researchers with the help of ten research assistants. Aggregate score was used to answer research questions 1 to 3 while Pearson r was used to answer research questions 4 and 5 and critical probability table of Pearson r was used to take decision on the six null hypotheses at 0.05 level of significance. The findings showed among others that: teachers rated their school organizational culture to be good; teachers’ job performance is good and teachers have positive attitude to their work. Also, it was found that there is no significant relationship between school organization culture and teachers’ job performance; and no significant relationship between school organizational culture and teachers’ attitude to work. Based Ogirisi: a new journal of African studies vol. 16 2020 30 on the findings it was recommended that: School management and management of Anambra State post primary school service Commission should ensure improvement in secondary school culture in order that all the teachers would rate their school culture to be good without some rating it to be poor. It was also recommended that inservice training be organized for secondary school teachers through seminars, workshops and advance learning in order to ensure that all of the teachers have good job performance and positive attitude to work.
An Attention-based Deep Relevance Model for Few-shot Document Filtering

With the large quantity of textual information produced on the Internet, a critical necessity is to filter out the irrelevant information and organize the rest into categories of interest (e.g., an emerging event). However, supervised-learning document filtering methods heavily rely on a large number of labeled documents for model training. Manually identifying plenty of positive examples for each category is expensive and time-consuming. Also, it is unrealistic to cover all the categories from an evolving text source that covers diverse kinds of events, user opinions, and daily life activities. In this article, we propose a novel attention-based deep relevance model for few-shot document filtering (named ADRM), inspired by the relevance feedback methodology proposed for ad hoc retrieval. ADRM calculates the relevance score between a document and a category by taking a set of seed words and a few seed documents relevant to the category. It constructs the category-specific conceptual representation of the document based on the corresponding seed words and seed documents. Specifically, to filter irrelevant yet noisy information in the seed documents, ADRM employs two types of attention mechanisms (namely whole-match attention and max-match attention) and generates category-specific representations for them. Then ADRM is devised to extract the relevance signals by modeling the hidden feature interactions in the word embedding space. The relevance signals are extracted through a gated convolutional process, a self-attention layer, and a relevance aggregation layer. Extensive experiments on three real-world datasets show that ADRM consistently outperforms the existing technical alternatives, including the conventional classification and retrieval baselines, and the state-of-the-art deep relevance ranking models for few-shot document filtering. We also perform an ablation study to demonstrate that each component in ADRM is effective for enhancing filtering performance. Further analysis shows that ADRM is robust under varying parameter settings.
Investigating the suitability and cost-benefit of copper tailings as partial replacement of sand in concrete in Zambia: an exploratory study

Purpose: This study investigated the suitability and cost-benefit of using copper tailings as partial replacement of sand in concrete production. The study was motivated by the accumulation and nonutilisation of Copper Tailings in dams among them Tailing Dam 25 also known as TD 25 in Kitwe city of the Copperbelt province in Zambia that take up approximately 111 hectares of unutilized land. Design/methodology/approach: Laboratory experimental approach of concrete production based on water/cement ratios of 0.3 and 0.5 was used because this was an exploratory study designed to establish the primary performance of concrete. 30 concrete cubes were cast based on the two water-cement ratios. 0% to 30% partial sand replacement with copper tailings was used in both mixes with the 0% copper tailings replacement being the control mix and reference point. Other concrete tests included workability, density, compressive strength and element composition analysis. Findings: Results revealed that copper tailings from TD 25 were suitable for partial replacement of sand in concrete. 30% of sand replacement with copper tailings was established as the maximum replacement amount to produce optimum compressive strength values from both mixes. The drier mix of 0.3 water-cement ratio produced higher compressive strength results of 23 MPa at 28 days of concrete curing with 2.34% as optimum concrete cost reduction. Originality/Value:The study provides guidance on optimum concrete grade produced and cost reduction details of copper tailing-based concrete to support for local authorities in suitable land wand waste management using real data.
A genetic algorithm‐based approach for making pairs and assigning exercises in a programming course

Pair programming is an approach where two programmers work to solve one programming problem sitting shoulder to shoulder on a computer. Several studies indicating numerous benefits of using pair programming as a teaching strategy exist. However, only a few of them take into consideration the mechanism followed for pair formation. With an aim to study the impact of pair programming on undergraduate students, we try to make the pairs compatible with a genetic algorithm‐based approach. Using a genetic algorithm, the system ensures that every pair in the class gets a particular combination of skills and personality traits. We also developed a desktop application to assign programming exercises to students dynamically. To assess the efficacy of pair programming in introductory programming course, a formal pair programming experiment was run at Netaji Subhas University of Technology. The pair programming experiment involved a total 171 undergraduate students from a computer engineering course. At the end of the program, we assessed the programming abilities of every student. We also analyzed the impact of a genetic algorithm‐based pairing mechanism. On the basis of assessments, it is observed that pair programming is a successful pedagogical tool for facilitating active learning of introductory programming courses. Responses to survey garnered from undergraduate students hint that the genetic algorithm approach leads to compatible pairs.
Design of Dual-Band Dual-Mode Band-Pass Filter Utilizing 0° Feed Structure and Lumped Capacitors for WLAN/WiMAX Applications

Two dual-band second-order highly selective band pass filters operated at 3.5/5.5 GHz and 3.5/6 GHz for wireless local area network /worldwide interoperability for microwave access WLAN/WiMAX applications are introduced in this paper. The designed filters are inspired of utilizing two coupled open-loop resonators loaded with stub, spiral resonators and lumped capacitors. The filters are designed based on calculating the desired coupling matrix and the external quality factor. The first and the second filters are designed at the fundamental mode of 3.5 GHz then the first filter is loaded with two spiral resonators in the microstrip line to produce the desired band stop behaviour, which in turn achieves the second pass-band. However, the second band of the second filter is achieved by loading the stub with the lumped capacitors, which controls the second mode. The centre frequency of the second band is adjusted by varying the lumped capacitors values. The two designed filters have insertion loss less than 0.7 dB in the pass-band region, high selectivity with more than 4 transmission zeros and more than 20 dB attenuation level in the stop band region. The suggested filter has compact size and high selectivity with tunability behavior. The two filters are fabricated and measured to validate the simulated results.
Antioxidant and biological activities of tyrosol, hydroxytyrosol and their esters

A series of lipophilic esters of tyrosol and hydroxytyrosol, two naturally occurring phenols in olive oil with interesting biological properties, were prepared by an enzymatic and simplified base extraction procedure. Both tyrosol and hydroxytyrosol are hydrophilic molecules with poor solubility in lipophilic media, resulting in limited usage in foods and limited uptake by the cells and bioavailability in vivo. The antioxidant activities of esters so produced were evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH), human low-density lipoprotein (LDL) oxidation, and DNA strand scission assays. The antiviral properties of selected esters were measured using hepatitis C virus (HCV) protease and alpha-glucosidase inhibitory activities. Antiglycation by bovine serum albumin (BSA)-glucose assay, protection effect against oxidative stress, generation anti-inflammatory products by nitrite assay, and cytotoxic properties by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay of selected esters were also evaluated. All methods used for the antioxidant activity evaluation indicated that tyrosol (TY) and its derivatives were less active than the corresponding hydroxytyrosols (HTY), which reflected the influence of the ortho-diphenolic (catechol) structure of the latter on antioxidant capacity. For hydroxytyrosol, the introduction of the lipid moiety decreased its antioxidant activity. We observed the inhibition of HTY saturated fatty acid esters against hydroxyl radical induced DNA oxidation decreased as alkyl chain length increased. Meanwhile, an unsaturation-dependent antioxidant effect was observed for TY and HTY esters in DNA strand scission assay, and for TY esters in DPPH assay. However, in the LDL oxidation assay, the polyunsaturated fatty acid (PUFA) moiety of TY esters may be oxidized. For antiviral properties of selected esters, most of the TY derivatives that showed potent inhibition on α-glucosidase were not active against HCV while HTY esters showed very good HCV protease inhibition, especially HTY caprylate, stearate and oleate esters which displayed 3-fold stronger inhibition than that of embelin (the positive control). Moreover, it was found that lipophilization by esterification could improve the anti-inflammatory and antiglycation effects of tyrosol and hydroxytyrosol. These results indicate that the lipophilic ester derivatives can served as antioxidant ingredients in food, as well as anti-inflammatory, antiglycation, and antiviral agents, and ingredients in other therapeutic applications, supplements and natural health products.
Implementasi Face Recognition Untuk Mengakses Ruangan

Teknologi biometrik yang berkembang saat ini seperti pengenalan sidik jari, pengenalan retina mata dan sebagainnya mengharuskan seseorang memposisikan tubuh pada posisi yang sesuai dengan posisi kamera yang membuat teknologi ini terkesan kaku, untuk itu sebuah sistem identifikasi lebih fleksibel dan bersifat otomatis dapat mencegah pencurian. Pada penelitian ini dirancang sebuah sistem keamanan yang dapat mengakses pintu masuk menggunakan face recognition berbasis Arduino Uno. Salah satu solusi keamanan dalam melakukan ototentikasi adalah menggunakan bagian tubuh manusia yaitu wajah. Sistem dapat mendeteksi objek wajah sebagai citra dari kamera. Setelah objek terdeteksi, sistem akan melakukan pencocokan wajah dengan citra wajah yang terdapat pada database sistem. Citra akan diproses dengan menggunakan metode LBPH. Sistem ini merupakan penerapan Smart Gate dalam sistem keamanan dengan tujuan dapat mengamankan ruangan yang bersifat pribadi/ private dengan menggunakan biometric fece recognition, penggunaan komponen-komponen elektronik dapat digunakan sebagai alat yang dapat mengenal karakter wajah agar dapat mengakses ruangan, dan dapat mengimplementasikan algoritma LBPH dalam pengenalan karakter wajah pada sistem yang akan di bangun. Hasil dari penelitian ini adalah kendali privilege pada Smart Gate menggunakan Arduino Uno dan biometric face recognition dapat meningkatkan keamanan pada ruangan, dapat memaksimalkan penggunaan komponen-komponen elektronik dan dapat mengimplementasikan algoritma LBPH
Monitoring of Honey Bee Colony Losses: A Special Issue

In recent decades, independent national and international research programs have revealed possible reasons for the death of managed honey bee colonies worldwide. Such losses are not due to a single factor, but instead are due to highly complex interactions between various internal and external influences, including pests, pathogens, honey bee stock diversity, and environmental change. Reduced honey bee vitality and nutrition, exposure to agrochemicals, and quality of colony management contribute to reduced colony survival in beekeeping operations. Our Special Issue (SI) on ‘’Monitoring of Honey Bee Colony Losses’’ aims to address specific challenges facing honey bee researchers and beekeepers. This SI includes four reviews, with one being a meta-analysis that identifies gaps in the current and future directions for research into honey bee colonies mortalities. Other review articles include studies regarding the impact of numerous factors on honey bee mortality, including external abiotic factors (e.g., winter conditions and colony management) as well as biotic factors such as attacks by Vespa velutina and Varroa destructor.
Single‐Session One‐At‐A‐Time Therapy: A Personal Approach

The terms ‘ single session therapy ’ (SST) and ‘ one-at-a-time ’ (OAAT) therapy are used to indicate a situation where the therapist and client set out with the expressed intention of helping the client in one session while acknowledging that additional sessions are available to the client. Both terms have their advantages and disadvan-tages and thus the author uses the blended term ‘ single session one-at-a-time ’ (SST/OAAT) therapy to highlight the advantages of both. It is a core feature of SST/OAAT therapy that it is client-centred especially where the ses- sion ’ s focus and goal are concerned. However, in an attempt to avoid SST/OAAT therapy being highjacked by therapists who operate from the ‘ expert ’ source of influence, the field has downplayed the contribution of the therapist ’ s expertise. In this paper, I make clear that the expertise of the therapist when allied to the expertise of the client can be a potent force for good in SST/OAAT therapy. My main task, however, is to outline my own approach to SST/OAAT therapy which is a blend of general principles that are likely to be held by the majority of SST/OAAT therapists and specific ideas that are derived from working with alliance theory, pluralism, and rational emotive behaviour therapy.
Greater microbial carbon use efficiency and carbon sequestration in soils: Amendment of biochar versus crop straws

While high soil carbon stability had been well known for biochar‐amended soils, how conversion of crop residues into biochar and subsequent biochar amendment (BA) would favor microbial carbon use and carbon sequestration had not been clearly understood. In this study, topsoil samples were collected from an upland soil and a paddy soil, both previously amended with straw and straw‐derived biochar. These samples were incubated with 13C‐labeled maize residue (LMR) for 140 days to compare carbon mineralization, metabolic quotient (qCO2), and microbial carbon use efficiency (CUE) under laboratory incubation. 13C‐phospholipid fatty acid (13C‐PLFA) was used to trace the use of substrate carbon by soil microorganisms. Comparing to straw amendment (SA), BA significantly decreased the native soil organic carbon (SOC) mineralization rates by 19.7%–20.1% and 9.2%–12.0% in the upland and paddy soils, respectively. Meanwhile, total carbon mineralization from the newly added LMR was significantly decreased by 12.9% and 11.1% in the biochar‐amended soils, compared with the straw‐amended soils from the upland and paddy sites, respectively. Furthermore, compared to non‐amended soils, the qCO2 value was unchanged in straw‐amended soils, but was notably decreased by 15.2%–18.6% and 8.9%–12.5% in biochar‐amended upland and paddy soils, respectively. Microbial CUE was significantly greater in biochar‐amended soils than in straw‐amended soils due to the increasing dominance of fungi in carbon utilization. Compared to SA, BA increased CUE by 23.0% in the upland soil and 21.2% in the paddy soil. This study suggests that BA could outperform SA in the long term to enhance the biological carbon sequestration potential of both upland and paddy soils. This could be due mainly to biochar input as a special substrate to promote microbial community evolution and increase the fungal utilization of carbon substrates, especially for the soil with lower SOC levels.
Pharmacodynamic Comparison of Ticagrelor Monotherapy Versus Ticagrelor and Aspirin in Patients After Percutaneous Coronary Intervention: The TEMPLATE (Ticagrelor Monotherapy and Platelet Reactivity) Randomized Controlled Trial

Background To assess differences in platelet inhibition during ticagrelor monotherapy (TIC) or dual therapy with ticagrelor and aspirin (TIC+ASP) in patients after percutaneous coronary intervention using a comprehensive panel of functional tests. Methods and Results In a single‐center parallel group, open label, randomized controlled trial, 110 participants were randomized to receive either TIC (n=55) or TIC+ASP (n=55) for 4 weeks. The primary outcome was the platelet aggregation response with 10 μmol/L thrombin receptor activation peptide‐6 (TRAP‐6). The secondary outcomes were platelet aggregation responses and binding of surface activation markers with a panel of other activators. The mean percentage aggregation for 10 μmol/L TRAP‐6 was similar for the TIC and TIC+ASP groups (mean difference+4.29; 95% CI, −0.87 to +9.46). Aggregation was higher in the TIC group compared with the TIC+ASP group with 1 μg/mL (+6.47; +2.04 to +10.90) and 0.5 μg/mL (+14.00; +7.63 to +20.39) collagen related peptide. Aggregation responses with 5 μmol/L TRAP‐6, 5 μmol/L or 2.5 μmol/L thromboxane A2 receptor agonist and surface activation marker binding with 5 μmol/L TRAP‐6 or 0.5 μg/mL collagen related peptide were the same between the treatment groups. Conclusions Patients with PCI show similar levels of inhibition of most platelet activation pathways with TIC compared with dual therapy with TIC + ASP. However, the greater aggregation response with collagen related peptide during TIC indicates incomplete inhibition of glycoprotein VI (collagen) receptor‐mediated platelet activation. This difference in pharmacodynamic response to anti‐platelet medication may contribute to the lower bleeding rates observed with TIC compared with dual antiplatelet therapy in recent clinical trials. Registration Information URL: https://www.isrctn. com; Unique Identifier ISRCTN84335288.
Design of Sense Amplifier using Flip-Flops for Memory Applications

: A novel high-speed and highly reliable sense amplifier-based flip-flop with transition completion detection (SAFF-TCD) is proposed for low supply voltage ( V DD ) operation. The SAFF-TCD adopts the internally generated detection signal to indicate the completion of sense-amplifier stage transition. The detection signal gates the pull-down path of the sense-amplifier stage and the slave latch, thus overcoming the operational yield degradation, current contention, and glitches of previous SAFFs.The operational yield, speed, hold time, energy consumption, and area of the proposed and previous FFs are quantitatively compared for a wide range of V DD with 22-nm Fin FET technology. It is shown that the minimum V DD of the SAFF-TCD is 573 mV lower than that of previous SAFFs, which means the SAFF-TCD can operate even when V DD is in the near threshold or sub threshold region. At 0.3–0.4 V, the SAFF-TCD operates twice as fast as the master–slave-based FF (MSFF) with a practical hold time.