Miracle-dz/UniFAR-FTUs huggingface dataset:
Método para alocação, dimensionamento e gerenciamento da operação de BESS visando redução de perdas elétricas em sistemas de distribuição

With the increasing demand for electricity and the interest in the integrating intermittent sources into distribution systems, new technologies are needed to improve their reliability and to maintain good power quality indicators. In this context, the use of batteries in distribution systems to assist in such issues is proving interesting. Thus, this work proposes an optimization method to allocate, dimension and manage the operation of energy storage systems by means of batteries in distribution systems aiming at reduce electrical losses without exceeding their operational limits. Resumo: Com a elevação da demanda por energia elétrica e o interesse de integração de fontes intermitentes em sistemas de distribuição, novas tecnologias são necessárias para melhorar a confiabilidade dos mesmos e para manter bons indicadores de qualidade de energia. Neste contexto, o uso de baterias em sistemas de distribuição para auxiliar em tais questões vem se mostrando interessante. Deste modo, este trabalho propõe um método de otimização para alocar, dimensionar e gerenciar a operação de sistemas de armazenamento de energia por meio de baterias em sistemas de distribuição visando reduzir as perdas elétricas sem extrapolar seus limites operativos.
Pyroelectric conversion cycle of vinylidene fluoride‐trifluoroethylene copolymer

Copolymers of vinylidene fluoride–trifluoroethylene P(VDF‐TrFE) exhibit large piezoelectric and pyroelectric effects. In addition to the most common application of the pyroelectric effect (radiant detection) it is possible to convert heat directly into electrical energy by pyroelectric conversion. This study reports the first pyroelectric conversion cycle to be measured for the copolymer P(VDF‐TrFE). It is found that standard isothermal D‐E hysteresis loop measurements are not necessarily accurate predictors of pyroelectric conversion performance for this material. Conduction effects are found to obscure the observation of conversion cycles in most cases for the presently available materials. In spite of these difficulties, a conversion cycle was measured whose output electric energy density was 30 mJ/cm3. The output density is 15 times larger than any other polymer previously measured .
High Resolution FTIR and Diode Laser Supersonic Jet Spectroscopy of the N = 2 HF Stretching Polyad in (HF)2 and (HFDF): Hydrogen Bond Switching and Predissociation Dynamics

We report Fourier transform infrared (FTIR) and high resolution diode laser spectra (∼ 1MHz instrumental bandwidth) obtained in cooled absorption cells as well as in a supersonic jet expansion for the N = 2 polyad region of the HF-stretching vibrations of (HF)2, HFDF and DFHF. Three vibrational transitions have been observed for (HF)2 and two for both monodeuterated isotopomers. For (HF)2 we have identified and analysed the observed transitions of the polyad member 22 of the type Δ Ka = 0 and Δ Ka = ± 1 up to rotational sublevel Δ Ka = 3. Band centers as well as rotational constants of all four Ka states have been determined. The tunneling splittings due to hydrogen bond switching for these four Ka states have been investigated, with the Δ Ka = 0 up to Δ Ka = 2 sublevels having tunneling symmetry Γvt = A+ for the lower tunneling states, and switching periods ranging from 158ps for Ka = 0 to 1.35ns for Ka = 2. A tunneling level inversion is found at Δ Ka = 3, leading to a symmetry Γvt = B+ for the lower tunneling state of this Ka-sublevel. The vibrational assignment of the measured spectra of (HF)2 was established by comparison with the monodeuterated isotopomers HFDF and DFHF. For HFDF we have identified and analysed five subbands between 7600cm-1 and 7730cm-1. We have determined the spectroscopic constants of the rotational levels Δ Ka = 0 and Δ Ka = 1 for the vibrationally excited state and of the levels of Δ Ka = 1 and Δ Ka = 2 of the ground state, the latter from combination differences. From the measurements in a supersonic jet expansion we determined the predissociation line width of the N = 22, Ka = 1 to be about 120MHz for the Γvt = A+ tunneling state of (HF)2 and about 90MHz for Γvt = B+. For the Δ Ka = 0 level of N = 22 we obtained predissociation line widths ranging around 100MHz, similar to those of the Δ Ka = 1 level. In the case of HFDF, the predissociation line width of Δ Ka = 1 is about 80MHz. Predissociation lifetimes for these levels with the unbonded HF stretching excited thus are in the range of about 1 to 2ns. The predissociation width in the N = 21 level is uncertain by about a factor three with lg(Δν/MHz) = (3 ± 0.5) and in N = 23 it is about 600MHz corresponding to rounded lifetimes of 0.1ns and 0.3ns when the bonded HF stretching is excited thereby demonstrating strongly mode selective predissociation rates in the N = 2 polyad. Under thermal equilibrium conditions we derived the pressure broadening coefficient for (HF)2 (γ = (6 ± 1) × 10-4cm-1/mbar in the wavenumber range between 7713cm-1 and 7721cm-1 for total gas pressures between 10 and 60mbar, all values as full widths half maximum). For absolute frequency calibrations we have remeasured the first overtone transitions of the monomer HF with much improved precision between P(5) (7515.80151cm-1) and R(7) (7966.22188cm-1).
Caulerpa lentillifera Polysaccharides-Rich Extract Reduces Oxidative Stress and Proinflammatory Cytokines Levels Associated with Male Reproductive Functions in Diabetic Mice

Diabetes mellitus is a chronic metabolic disease that is positively correlated with reproductive dysfunction. Caulerpa lentillifera is an edible green alga with antioxidant and anti-diabetic properties. This study aims to evaluate the ameliorative effects of a polysaccharides-rich extract from C. lentillifera on the reproductive dysfunctions of diabetic male BALB/c mice induced by a high-fat diet (HFD) supplemented with intraperitoneal injections of streptozotocin (STZ). C. lentillifera was obtained from hot water and converted into a powder form (C. lentillifera extract (CLE)) by freeze drying. Mice were fed an HFD for 4 weeks before supplementing with STZ (30 mg/kg). The diabetic mice were divided into five groups, including a control group, a diabetic (DM) group, a DM with administration of a low-dose CLE treatment (DM+CLE1, 600 mg/kg), a DM with administration of a high-dose of CLE (DM+CLE2, 1000 mg/kg) and a DM with metformin treatment as a positive control (DM+Met, 200 mg/kg) for 6 weeks. The results showed that the CLE administration improved hyperglycemia and insulin resistance. Proinflammatory cytokines such as interleukin-1β and tumor necrosis factor-α were found to decrease in the CLE-treated groups. Additionally, CLE was shown to improve sperm motility and testis morphology. Based on the results, it was confirmed that the polysaccharides-rich extract from C. lentillifera extract was able to prevent diabetes-induced male reproductive dysfunction.
Retrospective Analysis of Prognostic Factors of Localised or Locally Advanced Prostate Cancer and Their Influence on Treatment Choice

Background: According to the majority of retrospective analyses and meta-analyses published in recent years, radical prostatectomy is a more effective treatment method than radical radiotherapy. The objective of this study was to assess whether the treatment method influences the survival of patients with early prostate cancer and to evaluate the impact of patient-dependent and prostate cancer-dependent prognostic factors on the choice of radical treatment method of prostate cancer.Methods: Medical records of selected patients were reviewed. Inclusion criteria involved histologically confirmed prostate adenocarcinoma; localised or locally advanced prostate cancer diagnosed in 2008-2012; no distant metastases at the time of initial diagnosis; medical records maintain comprehensive data on treatment and follow-up. The influence of prognostic factors on the choice of treatment method was assessed by making comparisons between groups using the Chi-square test.Results: More favorable prognostic factors were found in the RP treatment group compared to the RT treatment group: patients aged 60 years and younger accounted for 35% in the RP group, and 18% - in the RT group, with increasing age the number of RP decreased and the number of RT increased (p < 0.001); score of 3-4 points of CCI was set in 36% patients in the RP group, and 6% - in the RT group, with increasing CCI score, the number of RP decreased and the number of RT increased (p < 0.001); baseline PSA level of 10 ng/ml and less was found in 67% patients in the RP group, and 52% - in the RT group, with increasing PSA level, the number of RP decreased and the number of RT increased (p < 0.001). Gleason score did not influence the choice of treatment method (p = 0.24). Conclusions: Prognostic factors of localised or locally advanced prostate cancer influenced the choice of treatment method. In case of more favorable prognostic factors, radical prostatectomy was more often chosen.
Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018

The Bicep/Keck Array experiment is a series of small-aperture refracting telescopes observing degree-scale Cosmic Microwave Background polarization from the South Pole in search of a primordial B-mode signature. As a pair differencing experiment, an important systematic that must be controlled is the differential beam response between the co-located, orthogonally polarized detectors. We use high-fidelity, in-situ measurements of the beam response to estimate the temperature-to-polarization (T → P) leakage in our latest data including observations from 2016 through 2018. This includes three years of Bicep3 observing at 95 GHz, and multifrequency data from Keck Array. Here we present band-averaged far-field beam maps, differential beam mismatch, and residual beam power (after filtering out the leading difference modes via deprojection) for these receivers. We show preliminary results of "beam map simulations," which use these beam maps to observe a simulated temperature (no Q/U) sky to estimate T → P leakage in our real data.
Three new, quick CEC methods for determining the amounts of exchangeable calcium cations in calcareous clays

The cation exchange capacity (CEC) is one of the most important properties of clays in terms of their performance in both natural and technical processes. For decades, common methods for determining exchangeable cations have failed when calcareous clays or soils were examined, because calcite is at least partly dissolved throughout the exchange experiment which in turn increases measureable Ca2+ concentrations. As a result, exchangeable Ca2+ and the sum of exchangeable cations by far exceed the amount of negative charges. In the past, the silver-thiourea method (AgTU) has been modified to overcome this problem (AgTUcalcite), but is unsatisfactory as the method is laborious. In the present study three new methods based on two alternative metal complexes, cobalt(III) hexamine (CoHex) and copper(II) triethylenetetramine (Cu-trien), are proposed. The optimum solid/liquid ratios of these methods and the optimum complex concentration of Cu-trien are reported, depending on the mineralogical composition of the samples. The key development is that the exchange solutions are saturated with respect to calcite prior to the experiment. Approximately 70–90% of the dissolution of calcite present as an admixture in a clay sample is suppressed in the subsequent cation exchange experiment, but not all. The Ca2+ exchange is not suppressed and there is no evidence for any precipitation of this Ca2+. Three possibilities for how to handle this problem are discussed, one of which is to perform no further correction. The resulting error arises from the remaining calcite solubility of the different solutions after pre-treatment with calcite. This corresponds to errors of 0.2–1.3 (CoHexcalcite)and 0.7–8.4 (Cu-triencalcite) meq/100 gCa2+ for samples with small and large CEC values, respectively. As a consequence of the poor performance of Cu-triencalcite for samples with large CEC, a more concentrated Cu-trien5 × calcite solution was developed which performed much better: 0.1–0.8 meq/100 g(Cu-trien5 × calcite). For Cu-trien5 × calcite and CoHexcalcite at least, the errors are in the range of the non-systematic scattering for exchangeable Ca2+ determination. Therefore, the methods suggested provide ‘operationally correct’ Ca2+ values without additional effort. Moreover, owing to the high selectivity of the index cations applied in the present study, only one exchange step is required, providing a significant advantage over the AgTUcalcite method.
Ethanol Extracted from Radix of Actinidia Chinensis Inhibits Human Colon Tumor Through Inhibiting Notch-signaling Pathway

Background: Colorectal cancer (CRC) is one of the most common tumors, and its five-year survival is still very low despite of the advance of treatment strategies. The antitumor effect of ethanol extracted from radix of Actinidia chinensis (EERAC) were identified in human colon cancer cells, but the underlying mechanism remains unclear. Methods: Cell proliferation, migration, and invasion were measured with cell counting kit-8 (CCK-8), wound healing, and transwell assays. Cell apoptosis and cycle were detected by flow cytometry. Western blotting and qRT-PCR were used to measure expression of target molecules. Xenograft tumor assay was applied to detect the influence of EERAC on tumor growth. Results: we found that EERAC inhibited the cell viability, migration, and invasion of SW480 cells in a concentration dependent manner, but promoted apoptosis and the cell percentage in S phase significantly. The suppression of notch-signaling pathway molecules, Notch1, Jagged1, and c-Myc, by EERAC was confirmed using western blotting and immunohistochemical staining. The significant inhibition of tumor growth by EERAC was also observed. Meanwhile, EERAC remarkably reversed the effects of mastermind like transcriptional coactivator 1 (MAML1, activator of notch-signaling pathway) on cell survival of SW480. Conclusions: EERAC might be a promising chemotherapeutic agent for CRC treatment.
Postmastectomy Radiotherapy in T1–2 Women Breast Cancer Patients with 1–3 Positive Axillary Lymph Nodes: A Propensity Score Matched SEER Analysis

Purpose: The application of postmastectomy radiotherapy (PMRT) in T1–2 women breast cancer patients with 1–3 positive lymph nodes has been controversial. We sought to determine the survival benefits of PMRT in the patients with T1–2 and 1–3 positive nodes.Methods: A retrospective study using the Surveillance, Epidemiology, and End Results (SEER) Regs Custom Data (with additional treatment fields) from 2001 to 2011 was performed. Patients who received PMRT were matched by the propensity score with patients who did not receive PMRT. The Overall survival (OS) and breast cancer-specific survival (BCSS) were analyzed. Results: We identified 56,725 women breast cancer patients with T1–2 and 1–3 positive nodes, and 18,646 patients were included in the analysis. After propensity score matching (1:1), with a median follow-up of 116 months, PMRT showed an increase in the OS (P = 0.018) but had no effect on the BCSS. The 10-year OS rates were 76.8% and 74.4%, and the 10-year BCSS rates were 82.8% and 82.2% for the patients who received and who did not receive PMRT, respectively. Only patients with 3 positive nodes could gain the benefit of PMRT for BCSS.Conclusion: PMRT for patients with T1–2 and 1–3 positive lymph nodes could increase the 10-year OS, and had no effect on the 10-year BCSS. Subgroup analysis indicated that only patients with 3 positive lymph nodes could benefit from PMRT for both the OS and BCSS.
La desigualdad socioterritorial y el bienestar económico: Una propuesta metodológica

This scientific article details the analysis of inequality from a socio-territorial perspective and integrates the main paradigms that limit the economic well-being of the regions; however, the purpose is to build a methodological scheme that relates the dimensions of socio-territorial inequalities and economic wellbeing. For this, an inductive deductive analysis is presented that involves the documentary and observational technique. In this way it is clearly identified that poverty and vulnerability have a close relationship with social and territorial inequality, from this it is rescued that dimensions such as geographical space, housing conditions, household characteristics, citizen participation and technology is essential to catalog the existing disparity in poor and vulnerable regions; Likewise, it is shown that economic well-being depends on the level of employment, productive participation, level of income and level of consumption expenditure. To conclude, the research is a link to generate interest on the part of the State in the formulation of government policies based on the reality of the communities, discovering their comparative advantages that arise as a result of the need to have a better quality of life.
A sequential optimization procedure designed for Lyot coronagraph aiming to realize high contrast direct imaging for exoplanets

Coronagraph is a powerful instrumentation that can be used to realize direct exoplanet imaging. Because the stars are far brighter than the exoplanets, a very high requirement for extinction is raised to obtain a high contrast imaging. By optimizing the transmittance of the entrance pupil and the Lyot stop in Lyot Coronagraph, a sequential optimization procedure is proposed to obtain even higher contrast imaging. In this manuscript, the usually adopted joint optimization in the existing literatures is divided into two steps, which we call the sequential optimization procedure. First, the entrance pupil is optimized for maximum transmission while the contrast constraint is imposed on the focal plane of the lens behind it. Second, the Lyot stop is optimized for maximum transmission with the contrast constraint imposed on the imaging plane. Compared with the joint optimization procedure, the sequential one can provide additional advantages. In terms of performance, under the same conditions, an IWA(Inner working angle) of 1. 53λ/D can be obtained while the IWA for joint one is 2. 01λ/D. Moreover, the sequential optimization is much faster. Referring to practical applications, the optimum transmittance of Lyot stop in sequential case becomes binary and therefore easy to fabricate. However sequential optimization reduces the throughput approximately 36.81%, which is a drawback that should be compensated.
A next generation upgraded observing platform for the automated Birmingham Solar Oscillations Network (BiSON)

The Birmingham Solar Oscillations Network (BiSON) is a collection of ground-based automated telescopes observing oscillations of the Sun. The network has been operating since the early 1990s. We present development work on a prototype next generation observation platform, BiSON:NG, based almost entirely on inexpensive offthe-shelf components, and where the footprint is reduced to a size that can be inexpensively installed on the roof of an existing building. Continuous development is essential in ensuring that automated networks such as BiSON are well placed to observe the next solar cycle and beyond.
Approaches to Assessing the Strategic Sustainability of High-Risk Offshore Oil and Gas Projects

In the face of today’s global challenges, oil and gas companies must define long-term priorities and opportunities in implementing complex Arctic offshore projects, taking into account environmental, economic, technological and social aspects. In this regard, ensuring strategic sustainability is the basis for long-term development. The aim of the study is to analyze existing approaches to the concept of “strategic sustainability” of an offshore Arctic oil and gas project and to develop a methodological approach to assessing the strategic sustainability of offshore oil and gas projects. In the theoretical part of the study, the approaches to defining strategic sustainability were reviewed, and their classification was completed, and the most appropriate definition of strategic sustainability for an offshore oil and gas project was chosen. The method of hierarchy analysis was used for strategic sustainability assessment. Specific criteria have been proposed to reflect the technical, geological, investment, social and environmental characteristics important to the offshore oil and gas project. The strategic sustainability of 5 offshore oil and gas projects was analyzed using an expert survey as part of the hierarchy analysis method. Recommendations were made on the development of an offshore project management system to facilitate the emergence of new criteria and improve the quality of the strategic sustainability assessment of offshore projects in the Arctic.
Indígenas na Universidade: uma comunidade criativa de práticas em Design colaborativo

A colaboracao e um aspecto essencial da atividade contemporânea do Design, pois atende as necessidades da Nova Economia que direciona a reconfiguracoes estruturais nos modos de vida, producao e consumo. Comunidades criativas sao casos promissores de iniciativas locais que provocam descontinuidades sistemicas rumo a sustentabilidade. Este artigo objetiva contextualizar duas oficinas de Design entre indigenas e nao-indigenas da Universidade Estadual de Londrina a partir dos conceitos de Comunidades Criativas e Comunidades de Pratica. Para tanto, foi realizada uma sistematizacao dos referenciais teoricos e dos registros etnograficos das oficinas em mapas mentais para comparacao conceitual. A pesquisa e de natureza exploratoria e descritiva, pautada na metodologia qualitativa da pesquisa social. Os resultados mostram que ha uma relacao entre as Comunidades Criativas e de Pratica no contexto da Sustentabilidade Sociocultural; e que as oficinas realizadas sao casos promissores de inovacao no processo de Design.
WHOOP, Inc.: Digital Entrepreneurship During the Covid-19 Pandemic

This case is about WHOOP, Inc., a digital startup in the fitness technology space, how it responded to the Covid-19 pandemic, and its evolving business model and opportunities in the competitive wearables industry. WHOOP launched as a wearable device company. Its business model evolved from selling a device to providing software as a service (SaaS). Industry competitors included large digital organizations like Apple and Google, sportswear companies such as Under Armour and Nike, and global wearable device startups like Oura, a health technology firm in Finland. In early 2020, as a response to the Covid-19 pandemic, WHOOP launched research initiatives to track user wellbeing in the social-distancing conditions imposed worldwide. The company responded to disruptions to its supply chain, developed and evaluated algorithms to detect Covid-19 infection, and created partnerships with research organizations. Going forward, WHOOP proposed to define a strategic response to business disruptions and the new digital platform competitors.