Miracle-dz/UniFAR-FTUs huggingface dataset:
DYNAMICS OF KNOWLEDGE FLOWS: GEOGRAPHICAL PROXIMITY, VERTICAL RELATIONS AND LEARNING BY INTERACTION

O objetio do artigo é compreender as fontes de conhecimento e os processos de aprendizagem que sustentam as inovações das firmas localizadas em Sistemas Locais de Produção (SLP). A principal contribuição é empírica. Foram pesquisados dois SLP do segmento de máquinas para calçados no final dos anos 2000, período em que já era observado o processo de mudança concorrencial com a entrada de empresas chinesas como concorrentes diretas das firmas analisadas. Adotou-se a lógica de que a geração da inovação é influenciada pelo aprendizado e pela interação da firma. A pesquisa de campo foi realizada com questionário estruturado e com entrevistas in loco, tanto na Itália quanto no Brasil. Em termos de resultados, destacam-se que: as relações verticais são mais frequentes quando comparadas às horizontais; o aprendizado por interação explica a geração de inovação; e a proximidade geográfica é importante para explicar as redes de conhecimento. Os resultados são consistentes com o padrão setorial identificado como fornecedor especializado.
Current-Based Coordination of Distributed Energy Resources in a Grid-Connected Low-Voltage Microgrid: An Experimental Validation of Adverse Operational Scenarios

Low-voltage grid-connected microgrids rely on the exploitation of inverter-interfaced distributed energy resources (DERs) in order to feed loads and to achieve bidirectional power flow controllability at their point of common coupling (PCC) with the upstream grid. However, adverse operational conditions, such as the existence of DERs of different operation natures, DERs of non-equal power ratings, as well as the occurrence of non-steady and non-sinusoidal grid voltage scenarios, bring complications to microgrid energy management. Consequently, control strategies employed to coordinate DERs in dispatchable microgrids need to be resilient to such non-ideal conditions. Hence, this paper demonstrates that a multi-purpose strategy, so-called the Generalized Current-Based Control (GCBC) approach, is capable of steering DERs under such adverse operational scenarios, ensuring proportional current sharing among them while also regulating the microgrid power dispatchability at the PCC. The discussions are supported by an extensive experimental validation on a laboratory-scale single-phase microgrid prototype, demonstrating that the GCBC approach allows DERs of different operational natures to be coordinated, respecting their power ratings, and allowing the single-controllable microgrid to endure operation under distorted voltages and support voltage ride-through conditions.
Danilov resolution and representations of McKay quiver

We construct a family of McKay quiver representations on the Danilov resolution of the 1/r(1,a,r - a) singularity. It follows that the resolution is the normalization of the coherent component of the moduli space of stable McKay quiver representations for a suitable stability condition. We describe explicitly the corresponding chamber of stability conditions for any coprime numbers r, a.
The Mechanism of Lipopolysaccharide’s Effect on Secretion of Endometrial Mucins in Female Mice during Pregnancy

The main toxic component of endotoxins released from the death or dissolution of Gram-negative bacteria is lipopolysaccharide (LPS), which exists widely in the natural environment, and a large amount of endotoxin can significantly inhibit the reproductive performance of animals. A previous study showed that endotoxins mainly damaged the physiological function of mucins in the endometrium, but the mechanism is not clear. In this study, the PI3K/Akt signaling pathway was not activated, and the NF-κB signaling pathway was inhibited by LPS treatment; the expression of occludin and E-cadherin proteins were decreased and ZO-1 protein expression was increased, because LPS can lead to the mucous layer becoming thinner, so that the embryonic survival rate is significantly reduced in early pregnancy. In middle and late pregnancy, LPS translocated to the epithelial cells of the uterus and the expression of claudin-1, JAMA, and E-cadherin proteins were decreased; at this time, a large number of glycosaminoglycan particles were secreted by endometrial gland cells through the PI3K/Akt/NF-κB signaling pathway that was activated after LPS treatment, However, there was no significant difference between the survival rates of fetal mice in the LPS (+) and LPS (-) groups. Glycosaminoglycan particles and mucins are secreted by gland cells, which can protect and maintain the pregnancy in the middle and late gestational periods.
Exploring Senior Phase teachers’ competencies in supporting learners with specific learning difficulties: Implications for inclusive education

Background Teaching learners with specific learning difficulties requires competent teachers who can provide learning support. Competencies such as identifying learning difficulties, assessing learners, designing interventions such as curriculum differentiation and facilitating referral systems are crucial. However, Senior Phase teachers in South Africa seem to be challenged when it comes to providing learning support. Consequently, learners do not meet the desired learning outcomes. Objectives The purpose of this study was to explore Senior Phase teachers’ competencies in supporting learners with specific learning difficulties in four mainstream schools. Methods A qualitative research approach and phenomenological research design were used. Eighteen teachers who were members of the school-based support teams, including learning support educators, were selected through purposive sampling. Data were collected through individual and focus group interviews, the analysis of support forms and field notes. A thematic data analysis was used to generate findings. Results The thematic data analysis revealed discrepancies relating to participants’ competencies in identifying language difficulties, short-term memory problems and contextual barriers. Also, participants differed in collaborating with peers, social workers, and the district-based support teams. Furthermore, some participants were able to design intervention programmes and facilitate internal and external referral processes. Conclusion The study concludes that teachers have different competencies in providing learning support. Therefore, the Department of Basic Education should provide a clear practical learning support strategy in the Senior Phase mainstream schools as well as continuous professional development for teachers couple with monitoring. Contribution It is envisioned that the study will contribute to understanding teachers’ competences in providing learning support for learners with specific learning difficulties in the senior phase. The study advocates for collaborative continuous professional teacher development focusing on interventions programmes to support learners with specific learning difficulties in the mainstream schools.
Modeling and Analysis of Group User Portrait through WeChat Mini Program

Meeting users’ preferences and increasing business revenue is an ongoing challenge in the mobile service application. In this paper, we address these challenges by mining mobile user behavior patterns and propose an approach to construct a group user portrait by analyzing access data collected from the users of the WeChat Mini Program. We extract the attributes of mobile users considering their geographic information, online duration, and age group. Using Z -score standardized processing and K -means clustering algorithm, we then model the user portraits through three dimensions including daily average duration, interaction intensity, and access frequency. Our analysis has two important features. Firstly, the significant log data used in our experiments was collected from the production environment ensuring that the results reflect the real attributes of WeChat Mini Program users’ behavior. Secondly, we provide data-driven decision-making to help marketers enhance the quality of the product and improve user experience. The experimental results indicate that by distilling and analyzing the key factors from the log data, the characters of typical users can be properly profiled to help product owners better optimize the exact set of the features which need to sustain and further grow.
Distributed Cooperative LQR Design for Multi-Input Linear Systems

In this article, a cooperative linear quadratic regulator (LQR) problem is investigated for multi-input systems, where each input is generated by an agent in a network. The input matrices are different and locally possessed by the corresponding agents, respectively, which can be regarded as different ways for agents to control the multi-input system. By embedding a fully distributed information fusion strategy, a novel cooperative LQR-based controller is proposed. Each agent only needs to communicate with its neighbors, rather than sharing information globally in a network. Moreover, only joint controllability is required, which allows the multi-input system to be uncontrollable for every single agent. In particular, only one-time information exchange is necessary at every control step, which significantly reduces the communication consumption. It is proved that the boundedness (convergence) of the controller gains is guaranteed for time-varying (time-invariant) systems. Furthermore, the performance of the entire system is ensured. Generally, the proposed controller achieves a better tradeoff between the control performance and the communication overhead compared with existing distributed LQR-based controllers. Finally, the effectiveness of the theoretical results is illustrated by several comparative numerical examples.
Time to Treatment Intensification to Reduce Diabetes-Related Complications: A Post Hoc Study

Patients with type 2 diabetes mellitus (T2DM) can be affected by clinical inertia, leading to abysmal results. Studies on a suitable timeframe for treatment intensification remain scarce—especially outside of developed countries. This study aimed to explore the association between time to treatment intensification and diabetes-related complications. A database from a tertiary care hospital in Thailand was retrieved in order to conduct a retrospective cohort study for the years 2011–2017. This study comprised outpatients with T2DM presenting an HbA1c of ≥7.0%. Eligible patients were divided into three groups based on the time of treatment intensification: no delayed treatment intensification, treatment intensification within 6 months, and treatment intensification after 6 months. A Cox proportional hazards model was used to investigate the association between time to treatment intensification and diabetes-related complications. A total of 686 patients were included in the final analysis. During 6.5 years of median follow-up, the group with treatment intensification within 6 months was more strongly associated with diabetic nephropathy compared to the group with no delayed treatment intensification (adjusted HR 2.35; 95%CI 1.35–4.09). Our findings reveal that delaying treatment intensification by even 6 months can increase the likelihood of diabetic nephropathy compared to no delayed treatment intensification. We suggest that patients with T2DM whose blood glucose levels are outside the target range promptly receive treatment intensification.
Silicon Die Transient Thermal Peak Prediction Approach

It is well known that Field Programmable Gate Arrays (FPGA) are good platforms for implementing embedded systems because of their configurable nature. However, the temperature of FPGAs is becoming a serious concern. Improvements in manufacturing technology led to increased logic density in integrated circuits as well as higher clock frequencies. As logic density increases, so do power density, which in turn increases the temperature, FPGAs follow the same path. A prediction of the thermal state of the Altera Cyclone V System-on-Chip (SoC) is presented in this work. The prediction study employs a numerical technique called Finite Element Method (FEM), which is a discretization method to approximate the real solution of the Partial Differential Equation (PDE) for heat transfer around the board's critical sources. The DE1 5CSEMA5F31C6N board was simulated using the COMSOL Multiphysics® tool for predicting thermal peaks during 13 hours of normal operation. Using the NISA tool, we obtained very similar results to those previously obtained with a margin of error of 2 %. As a result, a Verilog code implementation that describes the same approach used by the last two simulation tools is uploaded to the FPGA to verify the results of these simulations. This paper provides a more accurate vision of the level of operating stability of our FPGA board, which are currently the most important source for prototyping and designing the world's largest systems.
On the Asymptotic Determination of Invariant Manifolds for Autonomous Ordinary Differential Equations

A methodology to calculate the approximate invariant manifolds of dynamical systems defined through an m-dimensional autonomous vector field is presented. The technique is based on the calculation of formal symmetries and generalized normal forms associated to the vector field making use of Lie transformations for ordinary differential equations. Once a symmetry is determined up to a certain order, a reduction map allows us to pass from the equation in normal form to the orbit space,leading to the so-called reduced system of dimension s < m. Next, a non-degenerate p-dimensional invariant set of the reduced system is transformed, asymptotically, into a (p+m-s)-dimensional invariant set of the departure equation. We put three examples of normal forms computations and reduction process for Hamiltonian and dissipative systems. The procedure is illustrated by three applications: i) we characterize the set of all periodic orbits sufficiently close to the origin of the Hamiltonian vector field defined by the H? enon and Heiles family when the main frequencies do not satisfy a resonance condition; ii) we calculate the normally hyperbolic invariant manifold together with its stable and unstable manifold of an equilibrium point of type centre×centre×saddle for the three-degrees-of-freedom (3DOF) Hamilton function of the Rydberg atom, explaining the relevance of these invariant structures in the Transition State Theory; and iii) we apply our technique to the reduction process of the Lorenz equations, obtaining periodic orbits and some one-dimensional (1D) and 2D invariant sets.
Winning applicants and influencing job seekers: An introduction to the special issue on employer branding and talent acquisition

This article introduces the special issue in Human Resource Management featuring employer branding and talent acquisition. We provide a brief history of talent acquisition and introduce an employer branding approach to this process, especially emphasizing the potential of this approach for building competitive advantage. The challenges of employer branding on social media in the digital age are also highlighted. We then introduce the five papers contained in this issue, each representing a variety of levels of analysis, theoretical perspectives, environmental contexts, and methodological and design approaches to scholarly investigations on this topic. Our introduction concludes with a list of research questions characterizing an agenda for future research based aroundthe themes of (i) macro contextual effects; (ii) strategic employer branding; (iii) psychology and processing of employer brands; (iv) role the time; and (v) methods and approaches.
Energy-Dependent Particle Size Distribution Models for Multi-Disc Mill

Comminution is important in the processing of biological materials, such as cereal grains, wood biomass, and food waste. The most popular biomaterial grinders are hammer and roller mills. However, the grinders with great potential in the processing of biomass are mills that use cutting, e.g., disc mills. When it comes to single-disc and multi-disc grinders, there are not many studies describing the relationships between energy, motion, material, and processing or describing the effect of grinding, meaning the size distribution of a product. The relationship between the energy and size reduction ratio of disc-type grinder designs has also not been sufficiently explored. The purpose of this paper was to develop models for the particle size distribution of the ground product in multi-disc mills depending on the variable process parameters, i.e., disc rotational velocity and, consequently, power consumption, and the relationship between the grinding energy and the shape of graining curves, which would help predict the product size reduction ratio for these machines. The experiment was performed using a five-disc mill, assuming the angular velocity of the grinder discs was variable. Power consumption, product particle size, and specific comminution energy were recorded during the tests. The Rosin–Rammler–Sperling–Bennet (RRSB) distribution curves were established for the ground samples, and the relationships between distribution coefficients and the average angular velocity of grinder discs, power consumption, and specific comminution energy were determined. The tests showed that the specific comminution energy increases as the size reduction ratio increases. It was also demonstrated that the RRSB distribution coefficients could be represented by the functions of angular velocities, power consumption, and specific comminution energy. The developed models will be a source of information for numerical modelling of comminution processes.
Early Mortality in Infants Born with Neonatally Operated Congenital Heart Defects and Low or Very-Low Birthweight: A Systematic Review and Meta-Analysis

Mortality outcomes of children with isolated neonatally operated congenital heart defects (CHDs) born with a low (LBW), moderately low (MLBW) or very-low birthweight (VLBW) remain ambiguous. We searched Medline and Embase (inception until October 2021) and included studies that evaluated early mortality. The risk of bias was assessed using the Critical Appraisal Skills Program cohort checklist. Meta-analysis involved random-effects models. We explored variability in mortality across birthweight subgroups, CHD types, and study designs. From 2035 reports, we included 23 studies in qualitative synthesis, and the meta-analysis included 11 studies (1658 CHD cases), divided into 30 subcohorts. The risk of bias was low in 4/11 studies included in the meta-analysis. Summary mortality before discharge or within one month after surgery was 37% (95%CI 27–47). Early mortality varied by birthweight (VLBW 56%, MLBW 15%, LBW 16%; p = 0.003) and CHD types (hypoplastic left heart syndrome (HLHS) 50%, total anomalous pulmonary venous return (TAPVR) 47%, transposition of the great arteries (TGA) 34%, coarctation of the aorta (CoA) 16%; p = 0.13). Mortality was higher in population-based studies (49% vs. 10%; p = 0.006). One-third of infants born with neonatally operated isolated CHDs and LBW, MLBW, or VLBW died within 30 days after surgery. Mortality varied across infant and study characteristics. These results may help clinicians assess neonatal prognosis. PROSPERO registration CRD42020170289.
Transcription Factor MAFB as a Prognostic Biomarker for the Lung Adenocarcinoma

MAFB is a basic leucine zipper (bZIP) transcription factor specifically expressed in macrophages. We have previously identified MAFB as a candidate marker for tumor-associated macrophages (TAMs) in human and mouse models. Here, we analyzed single-cell sequencing data of patients with lung adenocarcinoma obtained from the GEO database (GSE131907). Analyzed data showed that general macrophage marker CD68 and macrophage scavenger receptor 1 (CD204) were expressed in TAM and lung tissue macrophage clusters, while transcription factor MAFB was expressed specifically in TAM clusters. Clinical records of 120 patients with lung adenocarcinoma stage I (n = 57), II (n = 21), and III (n = 42) were retrieved from Tsukuba Human Tissue Biobank Center (THB) in the University of Tsukuba Hospital, Japan. Tumor tissues from these patients were extracted and stained with anti-human MAFB antibody, and then MAFB-positive cells relative to the tissue area (MAFB+ cells/tissue area) were morphometrically quantified. Our results indicated that higher numbers of MAFB+ cells significantly correlated to increased local lymph node metastasis (nodal involvement), high recurrence rate, poor pathological stage, increased lymphatic permeation, higher vascular invasion, and pleural infiltration. Moreover, increased amounts of MAFB+ cells were related to poor overall survival and disease-free survival, especially in smokers. These data indicate that MAFB may be a suitable prognostic biomarker for smoker lung cancer patients.
Family Care and the Utilization of Medical Services of Elderly in China: Complementary or Substitutive?

This paper uses the data of four-phase CHARLS (2011-2018). It adopts binary selection models with fixed effect and instrumental variables, studying the influence of family care on outpatient and inpatient medical services for the elderly in China and its heterogeneous effect. There are two main findings: Firstly, with the endogeneity considered, family care is significantly complementary to medical service utilization, increasing the outpatient and inpatient probabilities of the elderly by 10.5% and 36.5%, respectively; Secondly, when the elderly reach a particular age group (75 and above), the deterioration of physical function caused by increasing age may weaken the impact of family care, the complementarity is significantly weakened to insignificant. In short, increasing the supply of care for the elderly expands the service boundaries of medical institutions. It forms an integrated and complete service system for medical and elderly care and will have a vital improvement in the medical system to better cope with the context of aging.
Towards a computational interpretation of parametricity

Reynolds' abstraction theorem has recently been extended to lambda-calculi with dependent types. In this paper, we show how this theorem can be internalized. More precisely, we describe an extension of the Calculus of Constructions with a special parametricity rule (with computational content), and prove fundamental properties such as Church-Rosser's and strong normalization. The instances of the abstraction theorem can be both expressed and proved in the calculus itself.