Miracle-dz/UniFAR-FTUs huggingface dataset:
Research on selecting the optimal design of antivibrational lathe tool using computer simulation

Computer simulation of machining processes can save cost, time, and lead to reach an effective predictive capability. In this paper, by using computer simulation, damping capability of the lathe tools under static and vibrational analysis at different tool overhang conditions is studied. A novel predictive model of the cutting tool is developed, in which damping capability of the tool is improved by using composite material with high damping capability. Epoxy granites with normal, rigid, and plastic structures were used as composite materials in modified model of tool holder. The all-metal model, model with holes in tool holder and the modified model filled up with the composite material, with the same geometry and dimensions are used.
Angioarchitecture of Elbow and Knee Joint Capsules in a Dog

The purpose of this study was to examine the microcirculation section of the elbow and knee joint capsules in a dog. Two dogs’ cadavers with precannulated a. subclavia and a. iliaca externa were used, through which an inkgelatin solution was introduced. The capsules were dehydrated in ascending alcohol series and enlightened in methylsalycylate. The resulting enlightened samples visualized the arterial and venous sections of the circulatory system, as well as the specific shaped capillary nets and arteriole-venular anastomoses. This method not only establishes the specific morphology of vascular formations, but also the possibility of proving regenerative, inflammatory and degenerative processes.
Partially-averaged Navier-Stokes (PANS) simulations of Ramjet/Scramjet mixing environment

Accurate simulation of the fuel-air mixing environment is crucial for high-fidelity scramjet calculations. We compute the velocity fields in cavity and jet into supersonic freestream flow configurations typical of scramjet flame-holding applications at dierent scale resolutions using the partially-averaged Navier-Stokes (PANS) method. We start with a brief description of the PANS methodology and closure model attributes. Then, we work our way up to scramjet simulations by presenting a sequence of careful verification and validation studies in relevant canonical flows such as those over cavity and backward-facing step. After establishing the physical fidelity of PANS, we proceed to simulate flame-holding flows and investigate their characteristic features at high Mach numbers. a
Usability of TeleFOT Nomadic and Aftermarket Devices [D1.8]

This deliverable reports on the Usability activities undertaken in TeleFOT mainly within WPs 4.8 and 4.10. These planned to support the Sub-Project 4 of TeleFOT in Evaluation and Assessment of nomadic devices within the national Field Operational Tests (FOTs). The key objective of WP4.8 in this regard is to provide measurable data that allows comparing usability and user experience of different driver assistance services whilst the key objective of WP4.10 is to identify and define the target and actual technical performance metrics for the Nomadic Devices (NDs) used. Two approaches are described in this Deliverable which have been utilised within TeleFOT for evaluating the usability of the nomadic and aftermarket devices tested within the TeleFOT FOTs. The first approach describes the feedback received from the TeleFOT participants with regard to their user experiences with the devices tested during the FOTs. To complement this information, each test site was asked to supply usability information specifically related to the time taken and the number of user interactions (aka button presses) to access certain functions within their ND. These included time and interactions to access the main menu and primary function, or adjust the volume, as well as to start up and shut down. The participants’ opinions on the design of the device, user interface, initial reactions and benefits to the NDs were then recorded as were ‘Other Issues’ which related to participants’ perceived usefulness, reliability and ease to interpret the information offered by the ND. This method allowed in-depth information to be captured surrounding issues which may have influenced the use of the ND during the FOT and/or common issues which arose. The second approach involved expert evaluations undertaken by HMI analysts working at the test-sites on a number of devices that were tested within TeleFOT. Not all of the devices that were tested within TeleFOT were subjected to expert evaluations. However, the procedure for such evaluations is described along with the results.
Role of social media marketing in improving marketing performance for smes during the covid-19 pandemic: a literature review

The presence of social media affects the marketing strategies for all businesses. This study aimed to formulate a social media marketing model for SMEs during the Covid-19 pandemic. The study conducted a literature review that examined various studies in social media marketing customer engagement and marketing performance. The exogenous variables were entrepreneurial orientation and market orientation. This study provides a model for the social media marketing and customer engagement research model as the intervening variables and research questions development for further research.
The Role of Extracellular Vesicles in Systemic Lupus Erythematosus

Extracellular Vesicles (EVs) are small vesicles that can be actively secreted by most cell types into the extracellular environment. Evidence indicates that EVs can carry microRNAs (miRNAs), long non-coding RNAs (lncRNAs), tRNA-derived small RNAs (tsRNAs), proteins, and lipids to target cells or tissue organizations. Latest studies show that EVs play a vital role in the immune modulation and may contribute to the pathogenesis of autoimmune diseases. Systemic lupus erythematosus (SLE) is a common autoimmune disease characterized by abnormal T cell activation and sustained production of autoantibodies against self-antigens, resulting in inflammation and damage to multiple systems. Pathogenic mechanisms of SLE, however, are still not well understood. In this review, we summarize the latest research advances on the functions and mechanisms of EVs, and its role in the pathogenesis, diagnosis, and treatment of SLE.
ANOMALOUS PRESSURE-INDUCED CHANGES IN MAGNETISM OF FERRIMAGNETIC Ni-Mn-Sn STRUCTURES

We have performed a quantum-mechanical study of two ferrimagnetic Ni2MnSn structures, a stoichiometric one with Mn-Ni swaps and an off-stoichiometric (Ni7Mn8Sn1) alloy. We used 16-atom supercells with the atomic positions related to those in the full Heusler structure, i.e. austenite phase (unless distorted by internal distribution of point defects as in the case of Ni2MnSn with swaps). We have determined thermodynamic, magnetic and structural properties of both pressure-free states as well as those corresponding to hydrostatic pressures of a few GPa. The atomic and magnetic configurations of the studied states are found to exhibit anomalous pressure-induced changes in the total magnetic moment. In particular, the total magnetic moments per 16-atom supercells increase with increasing hydrostatic pressure. Despite this peculiar trend in the total magnetic moment, the magnitudes of local magnetic moments of Mn atoms, that are decisive for the value of the total magnetic moment, decrease with increasing hydrostatic pressure (as is common in majority of magnetic systems). The identified phenomena may be related to an interplay of a few contributing mechanisms. First, the magnetic moments of Mn atoms, that are either parallel or antiparallel to the orientation of the total magnetic moment of the supercells, nearly compensate each other due to the ferrimagnetic nature of the studied magnetic states. Second, the swapped and off-stoichiometric atoms lead to different local atomic environments of Mn atoms and, consequently, to different local magnetic moments of these atoms as well as their different response to hydrostatic pressures. Importantly, the local magnetic moments of Mn atoms, that are antiparallel to the orientation of the total magnetic moment, are more sensitive to the applied pressures. Regarding thermodynamics, the studied states are excited ones.
Silicone Materials for Electrical Insulation: A Dielectric Study of Oil Versus Gel

This work studies the dielectric characteristics of three insulators, two silicone oils, and a silicone-based gel, in order to assess their suitability as insulators under extreme environmental conditions. Permittivities are determined for frequencies between 0.1 Hz and 1 MHz and for temperatures ranging from −143 °C to +120 °C. The observed dielectric constants are practically frequency invariant and subject to only minor changes with temperature. These results are consistent with the dipole relaxation contributing only marginally to the dielectric properties of the oils and even less in the case of the gel. For one silicone oil, only very small changes in the dielectric constant are found for electric fields up to 165 kV/cm, consistent with the high dielectric strengths of these materials. The results will aid the design of high-voltage components that employ silicone-based insulators by providing the data necessary for finite-element simulations across a wide range of frequencies and temperatures.
Jamming Effects on Hybrid Multistatic Radar Network Range and Velocity Estimation Errors

This research studies the effects of three noise jamming techniques on the performance of a hybrid multistatic radar network in a selection of different electronic warfare (EW) situations. The performance metrics investigated are the range and velocity estimation errors found using the Cramér-Rao lower bounds (CRLBs). The hybrid multistatic network simulated is comprised of a single active radar transmitter, three illuminators of opportunity (IO), a receiver co-located at the active transmitter site, and two separately located silent receivers. Each IO transmits at a unique frequency band commonly used for civilian applications, including Digital Video Broadcasting-Terrestrial (DVB-T), Digital Audio Broadcasting (DAB), and FM radio. Each receiver is capable of receiving signals at all three IO frequency bands as well as the operating frequency band of the active radar transmitter. The investigations included compare the performance of the network at detecting a single flying target under conditions where different combinations of jammer type, operating mode, directivity, and number of jammers operating are used. The performance degradation of the system compared to operation in a non-contested environment is determined and a comparison between the performance of the hybrid multistatic radar with that achievable by a monostatic radar and an active-only multistatic radar network within a selection of contested scenarios is made. Results show that the use of spatially distributed nodes and frequency diversity within the system enable greater theoretical functionality in the presence of jamming over conventional radar systems.
Adherence to Immunosuppressive Therapies after Kidney Transplantation from a Biopsychosocial Perspective: A Cross-Sectional Study

Kidney transplantation (KT) is the best method for kidney replacement therapy (KRT) because of patient survival rates and quality of life (QoL). Nowadays, the main cause of graft loss is antibody-mediated rejection. The treatment of humoral injury is difficult with uncertain results and still not firmly established. Therefore, appropriate adherence is crucial to prolong graft and patient survival. This study aims to evaluate the association of transplant patients’ acceptance of illness, symptoms of anxiety and depression, frailty, and QoL with medication adherence in KT recipients. A total of 210 patients after KT completed the surveys. The instruments were distributed during patients’ admission at the clinic by a qualified nurse, who assisted the patients’ in completing the questionnaires. A cross-sectional study of KT recipients 9.45 ± 7.26 years after KT was performed. Patient adherence with medications was assessed using the Adherence to Refills and Medications Scale (ARMS). Explanatory variables were examined with validated instruments, such as the World Health Organization Quality of Life (WHOQoL-BREF) questionnaire, The Mini-Mental State Examination (MMSE), the Acceptance of Illness Scale (AIS), the Hospital Anxiety and Depression Scale (HADS), and the Tilburg Frailty Indicator (TFI) scale, respectively. Simple linear and multiple regression analyses demonstrated the positive correlation between acceptance of illness and adherence to immunosuppressive medications in a patient sample of KT recipients. The other important factor facilitating adherence to medications was linked with physical and environmental dimensions. On the other hand, frail kidney transplant patients were more likely to be non-adherent. In conclusion, identifying contributors to better medication adherence in immunosuppressive therapy is crucial in preventing transplant rejection or graft loss. In the kidney transplant population, the acceptance of illness, selected dimensions of QoL, and demographic variables associated with rural living and vocational education favored adherence behaviors.
Probabilistic damage tolerance for small airplanes using a linear-elastic crack growth fracture mechanics surrogate model

Most general aviation (GA) aircraft are designed for safe-life based upon a crack initiation type failure mechanism, e.g., Miner’s rule. However, newer GA aircraft have fatigue crack growth as a design option. In addition, it may be necessary to evaluate a field event such as a cracked structure to ascertain the remaining life. Therefore, a risk based probabilistic damage tolerance analysis (PDTA) program is needed in several aerospace situations. A comprehensive probabilistic damage tolerance method requires a combination of deterministic crack growth, inspection methods, probabilistic methods, and random variable modeling to provide a single probability-of-failure, cumulative probability-of-failure, and hazard rate with and without inspection. In this work, a general methodology to conduct probabilistic crack growth based damage tolerance methodology for small airplanes will be developed and incorporated in a computer software. Random variables can be included in the model using Monte Carlo Sampling (MCS) and efficient numerical integration algorithms. Probabilistic damage tolerance analysis involves mathematically complex models and computational expensive simulations, which makes these analyses very inefficient. In this work the computational weight will be reduced using an error based adaptive surrogate model; the surrogate model will include the most influential random variables. The surrogate model will be used as a temporary substitution for the original crack growth model. An example problem will be presented to demonstrate the methodology.
Insights into the Cocoa and Forests Initiative: Smallholder Engagement with Certification Programs and Agroforestry

Abstract The Cocoa and Forests Initiative (CFI) in Côte d’Ivoire aims to address forest loss associated with cocoa cultivation by reducing deforestation and encouraging agroforestry. This study explores the relationship between certification programs, which operate primarily through cooperatives, and agroforestry to better understand the environment in which smallholder cocoa farmers operate. This study employs qualitative interviews and quantitative survey data to investigate farmer perceptions of certification programs and agroforestry initiatives and the impact of certification on participation in such initiatives. Farmers widely practiced low levels of agroforestry, about which they held generally positive views, and while certified farmers did not have more agroforestry trees, they were more knowledgeable about the benefits to cocoa production than non-certified farmers. Furthermore, many certified farmers conflated certification with cooperative membership. Understanding the role of preexisting institutions like certification and cooperatives is essential for the successful implementation of the CFI in a smallholder context.
Functional Split-Aware Optimal BBU Placement for 5G Cloud-RAN Over WDM Access/Aggregation Network

Fifth generation (5G) cloud-radio access network (C-RAN) aims at providing better performance and support to various applications with stringent data rate and latency requirements. In C-RAN, the processing units, known as the baseband units (BBUs), are segregated from the individual remote radio heads (RRHs) and moved to a convenient location to serve more than one RRH. This migration leads to an efficient resource allocation and cost-effective solution at the expense of a huge fronthaul traffic between the RRH and BBU hotel. The required fronthaul data rate largely depends on the employed functional split options. In this article, we propose a novel optimal BBU placement with a mixed functional split scheme to combat the fronthaul latency challenge while providing the network with greater flexibility and cost reduction. We introduce an integer linear programming (ILP)-based BBU placement problem with a mixed functional split selection approach to simultaneously minimize the number of BBU hotels and fibers, thereby reducing the network cost. Furthermore, a heuristic algorithm is proposed to solve the proposed model for large network scenarios. The obtained results show that an improvement of 25% and 50% is realized with the proposed scheme over the conventional fixed split option scheme for small and large network scenarios, respectively.
The Prevalence of Dengue Virus and Malaria Co-Infection among HIV-Infected Patients within South Eastern Nigeria

Background: Dengue and malaria are infections of great public health concern, especially in tropical countries like Nigeria where the burden of HIV infection is high. This study was conducted to determine the seroprevalence of dengue virus and dengue/malaria coinfection among febrile HIV-infected patients attending the University of Nigeria Teaching Hospital and Nnamdi Azikiwe University teaching university both in the southeastern region of Nigeria. Methods: In this cross-sectional study, blood samples from 338 consenting HIV-infected patients were collected and tested for plasmodiasis and DENV using malaria microscopy and ELISA, respectively. Interviewer-based questionnaires were used to assess subjects’ sociodemographic variables and dengue risk factors. This study was conducted within the peak period of the dry season (January-February 2016). Results: Of the 338 screened participants, 13.02% were seropositive for DENV, whereas 55.8% were positive for Plasmodium spp. About 2.7% were positive for both dengue virus and Plasmodium spp. The overall seroprevalence of dengue virus by NS1 antigenemia, IgM and IgG antibodies was 9.5%, 5.6% and 8%. Conclusion: The high prevalence of malaria and DENV indicates the need to strengthen vector control and dengue surveillance programs.
Coeliac Disease and Probiotics: Clinicians Need to Provide the Evidence Base for this Unmet Need.

For the last seventy years, a lifelong gluten free diet (GFD) has been the cornerstone of management of celiac disease (CD) [1]. The principal aim of adherence to the GFD is to reduce small intestinal inflammation, in order to provide symptom relief and promote mucosal healing. This is important, as symptoms associated with CD can negatively impact quality of life [2] and persisting small intestinal inflammation in CD has been associated with an increased risk of hip fractures (158 per 100,000 personyears) [3] and a higher risk of lymphoproliferative malignancy (102 per 100,000 person-years) [4]. While most individuals will display clinical improvement shortly after commencing a GFD, between 7-30% of patients will continue to experience symptoms and/ or have persisting intestinal inflammation [5, 6], which is most often due to deliberate or inadvertent ongoing gluten ingestion [7, 8]. Indeed, maintaining complete gluten abstinence is difficult, and adherence may be breached because of the widespread use of gluten as a food additive, high costs of the GFD, palatability and the social restrictions imposed by the GFD [6, 9]. Owing to the difficulties associated with adherence to the GFD, substantial work has focused on developing alternative therapeutic options EDITORIAL DOI: http://dx.doi. org/10.15403/jgld-4092
Fiction Propels the World, from Artificial Intelligence, Genetic Engineering to Augmented Society - on Some Aspects of Stanisław Lem’s Works

The aim of this paper is to analyse the influence of Stanisław Lem’s works, an outstanding representative of Polish science fiction, philosopher and futur-ologist, on the shape of reality in which we currently function. Undoubtedly, Lem’s writings are a collection of predictions that describe, with unprecedented accuracy, the technologies of virtual reality, nanotechnology, biotechnology or robotics long before they were created. Are we living in a world that was described by one man many years ago? The research method used in this study is the content analysis of the selected novels by Stanisław Lem and the analysis of available secondary data. Let us therefore examine, on the one hand, the predictions of the Polish writer related to the development of the latest technologies, the advent of which he forecasted many years before they were created, and, on the other hand, let us consider what social consequences resulting from such a rapid progress in the field of technology the Polish futurologist warns us about.
Ipsilateral Recurrence of DCIS in Relation to Radiomics Features on Contrast Enhanced Breast MRI

The purpose of this retrospective study was to investigate the association between ipsilateral recurrence of ductal carcinoma in situ (DCIS) and radiomics features from DCIS and contralateral normal breast on contrast enhanced breast MR imaging. A total of 163 patients with DCIS who underwent preoperative MR imaging between January 2010 and December 2014 were included (training cohort; n = 117, validation cohort; n = 46). Radiomics features were extracted from whole tumor volume of DCIS on early dynamic T1-subtraction images and from the contralateral normal breast on precontrast T1 and early dynamic T1-subtraction images. After feature selection, a Rad-score was established by LASSO Cox regression model. Performance of Rad-score was evaluated by the receiver operating characteristic (ROC) curve and Kaplan Meier curve with log rank test. The Rad-score was significantly associated with ipsilateral recurrence free survival (RFS). The low-risk group with a low Rad-score showed higher ipsilateral RFS than the high-risk group with a high Rad-score in both training and validation cohorts (p < 0.01). The Rad-score based on radiomics features from DCIS and contralateral normal breast on breast MR imaging showed the potential for prediction of ipsilateral RFS of DCIS.