Miracle-dz/UniFAR-FTUs huggingface dataset:
Derivation of Lighthill’s Eighth Power Law of an Aeroacoustic Quadrupole in Acoustic Spacetime

Acoustic spacetime is a four-dimensional manifold analogue to the relativistic spacetime with the reference speed of light replaced by the speed of sound. It has been established primarily for the indirect studies of relativistic phenomena by means of their better understood acoustic analogues. More recently, it has also been used for the analytical treatment of sound propagation in various uniform and non-uniform flows of the background fluid. In this paper the analogy is extended and utilized to derive Lighthill’s eight power law for sound generation of an aeroacoustic quadrupole. Adding to the existing analogue theory, propagating sound waves are described in terms of a weak perturbation of the background acoustic spacetime metric. The obtained result proves that the acoustic analogy can be extended to cover both weak perturbation of the fluid due to the sound waves and certain sound generation mechanisms, at least in incompressible low Mach number flows.
Demonisation of political discourses? How mainstream parties talk about the populist radical right

Abstract Academic research focuses on political communication of populist radical right parties and on their discourses about the political mainstream. Yet, we know less about how the political mainstream talks about radical right populists. Scholars assume a demonisation of populist radical right parties by the mainstream, which portrays the far-right outsiders as Nazis or fascists. This study assesses whether demonising discourses are indeed a common communicative element of Western European mainstream parties by analysing parties’ messages on Twitter in ten Western European countries during election campaigns. The findings indicate that demonising discourses are not as widespread as assumed in the literature but occur exclusively among some centre-left parties. In the article it is argued that historical contexts (experiences with fascist rule) and electoral breakthrough of radical right parties might explain why certain centre-lefts demonise their far-right competitors while others do not.
Detection and Quantification of Clostridium perfringens and Eimeria spp. in Poultry Dust Using Real-Time PCR Under Experimental and Field Conditions

SUMMARY. Infection of poultry with Eimeria spp. , the causative agent of coccidiosis, can predispose birds to necrotic enteritis (NE) caused by netB gene–positive strains of Clostridium perfringens. The detection of Eimeria spp. , C. perfringens, and netB were examined in settled dust from broiler flocks under experimental and field conditions. Dust samples were collected from settle plates twice weekly from two experimental flocks inoculated with three species of pathogenic Eimeria in 9-day-old chicks, followed by netB gene–positive C. perfringens 5 days later to produce subclinical and clinical NE. A noninoculated flock was sampled weekly from day 0 and served as a control flock. An additional 227 dust samples from commercial broiler flocks were collected at the end-of-batch (6–7 wk of age; one scraped dust sample per flock). In the NE-subclinical and NE-clinical flocks, high levels of Eimeria spp. and C. perfringens were detected after inoculation followed by a gradual decline over time. In the control flock, C. perfringens and netB were detected at low levels. No significant effect of sampling location was evident on Eimeria spp. , C. perfringens, and netB load within poultry houses. These results provide evidence that Eimeria spp. , C. perfringens, and netB gene copies can be readily measured in poultry dust samples collected in settle plates and may provide an alternative sampling method for monitoring flock coccidiosis and NE status. Further studies are required to assess the utility for such a test in commercial flocks.
Detection of mycotoxins produced by Fusarium species in Colombia

The genus Fusarium produces mycotoxins that are metabolites of low molecular weight that affect the quality of crops, and even more importantly, they affect the health of humans and animals. Among those that cause damage to health are trichothecenes, fumonisins, and zearalenones. The objective of this study was to quantify the mycotoxins produced by species of the genus Fusarium from a population of isolates obtained from different crops and locations in Colombia. From 206 isolates, only 14 amplified to regions associated with mycotoxins deoxynivalenol (DON) belonging to the group of trichothecenes, fumonisin (FUM) and zearalenone (ZEA) using PCR. Each isolate with the presence of mycotoxins was conserved in potato dextrose agar (PDA) medium. Eight days after seeding in corn kernel medium, the samples were processed to perform the quantitative analysis of DON, ZEA and FUM using an ELISA kit based on enzyme-linked immunosorbent assays. The results show that mycotoxins were present in the evaluated isolates and their levels were above the standards regulated by Mercosur and the European Union. The use of immunosorbent assays using the ELISA technique becomes a useful tool to detect and quantify mycotoxins of species of the genus Fusarium that affect different crops in Colombia.
IDEA: a web server for Interactive Differential Expression Analysis with R Packages

Differential expression (DE) analysis is a fundamental task in the downstream analysis of the next-generation sequencing (NGS) data. Up to now, a number of R packages have been developed for detecting differentially expressed genes. Although R language has an interaction-oriented programming design, for many biology researchers, a lack of basic programming skills has greatly hindered the application of these R packages. To address this issue, we developed the Interactive Differential Expression Analyzer (IDEA), a Shiny-based web application integrating the differential expression analysis related R packages into a graphical user interface (GUI), allowing users to run the analysis without writing any new code. A wide variety of charts and tables are generated to facilitate the interpretation of the results. In addition, IDEA also provides a combined analysis framework which helps to reconcile any discrepancy from different computational methods. As a public data analysis server, IDAE is implemented in HTML, CSS and JavaScript, and is freely available at http://idea.renlab. org.
A compact wideband circularly polarized antenna with two pairs of driven patch arrays

In this article, a new wideband circularly polarized (CP) antenna is presented. The antenna is composed of a circular‐loop feeding structure which provides sequential phase (SP), four primary‐parasitic crown patches and four secondary‐parasitic crown patches. The circular‐loop SP structure is used to feed the two pairs of crown patches by a capacitively coupled way. The presented antenna features a wide 10‐dB impedance bandwidth (IBW) of 23% (6 GHz, 5.31‐6.69 GHz), and a wide 3‐dB axial ratio bandwidth (ARBW) of 11.1% (5.875 GHz, 5.55‐6.2 GHz). The proposed antenna features compact structure and broad 3 dB‐ARBW, which could include the WLAN (5.725‐5.85 GHz), ITS (5.8 GHz), and WIFI (5.85‐5.925 GHz) band.
Improving Post Abortion Care (PAC) Delivery in Sub-Saharan Africa: A Literature Review

Saharan Africa (SSA) contributes 29% of the global unsafe abortions with 62% of abortion-related deaths. This is due to restrictive abortion laws, low quality post abortion care (PAC) and inadequate access to effective modern contraception. The overall objective was to review current literature on PAC in SSA and make recommendations for improvement especially in Cameroon. A literature review was conducted on PAC in SSA published during 2000-2018. The following databases were searched: MEDLINE, POPLINE, COCHRANE Library, African Index Medicus and GOOGLE Scholar. Thirty articles were reviewed from 16 countries ranging from observational studies to systematic reviews with meta-analysis. Major outcomes: 1) Manual vacuum aspiration (MVA) and misoprostol are equally safe and effective. 2) There is comparable effectiveness between physicians and trained mid-level cadres in PAC management. 3) PAC contraception uptake was increased when offered immediately before patient leaves the facility. 4) Gaps to PAC service use include inadequate access, low quality care and less adolescent-friendly environment. Task shifting of PAC to trained mid-level staff, decentralization of medical PAC using misoprostol, offering post abortion counselling and contraception to clients before leaving the health facility, encouraging linkage and provider-community partnership in PAC and reinforcement of advocacy for less restrictive abortion laws in Cameroon are recommended.
Exploring the relationship between Chinese pre-service teachers’ epistemic beliefs and their perceptions of technological pedagogical content knowledge (TPACK)

ABSTRACT This study aimed to investigate the differences between pre-service teachers’ (PSTs) perceived TPACK given the different clusters of their epistemic beliefs collected via a questionnaire. The responses gathered from 807 Chinese PSTs were utilised to elicit such a relationship. All of the participants responded to the Pre-service Teachers’ Epistemic Belief (PTEB) survey and the Technology, Pedagogy and Content Knowledge (TPACK) survey. The results of the cluster analysis revealed that the PSTs were characterised into three clusters according to their responses to the PTEB, labelled as the Positivist, Partial Constructivist and Constructivist clusters. The ANOVA revealed that the pre-service teachers in both the Positivist and Partial Constructivist clusters had stronger perceptions of their TPACK than did the Constructivist PSTs. The results imply that more nuanced approaches are needed to develop PSTs’ TPACK with reference to their epistemic profiles. In addition, it seems that the epistemic nature of creating TPACK may need to be discussed explicitly to foster PSTs’ epistemic developments.
Numerical Validation of an Analytical Seal Flutter Model

An analytical model to describe the flutter onset of straight-through labyrinth seals has been numerically validated using a frequency domain linearized Navier-Stokes solver. A comprehensive set of simulations has been conducted to assess the stability criterion of the analytical model originally derived by Corral and Vega (2018), “Conceptual Flutter Analysis of Labyrinth Seals Using Analytical Models - Part I: Theoretical Support,” ASME J. Turbomach. , 140 (12), pp. 121006. The accuracy of the model has been assessed by using a simplified geometry consisting of a two-fin straight-through labyrinth seal with identical gaps. The effective gaps and the kinetic energy carried over are retained and their effects on stability are evaluated. It turns out that is important to inform the model with the correct values of both parameters to allow a proper comparison with the numerical simulations. Moreover, the non-isentropic perturbations included in the formulations are observed in the simulations at relatively low frequencies whose characteristic time is of the same order as the discharge time of the seal. This effect is responsible for the bending of the stability limit in the 0th ND stability map obtained both in the model and the simulations. It turns out that the analytical model can predict accurately the stability of the seal in a wide range of pressure ratios, vibration mode-shapes, and frequencies provided that this is informed with the fluid dynamic gaps and the energy carried over to the downstream fin from a steady RANS simulation. The numerical calculations show for the first time that the model can be used to predict accurately not only the trends of the work-per-cycle of the seal but also quantitative results.
Concentration Gradient‐Based Soft Robotics: Hydrogels Out of Water

Hydrogels are biocompatible soft materials that resemble biological tissues more than any other material. However, the use of these systems in soft robotics has been limited to aqueous environments. In the work published to date, hydrogels have relied on external water to swell or shrink in response to stimuli and, therefore, to actuate macroscopically. In the work reported here, this limitation is overcome by synthesizing a novel type of electroactive hydrogels capable of actuating when a low electric field is applied, even outside water. The bending actuation of these materials is caused by the movement of solvated ions within the hydrogel, which generates a concentration gradient, making it possible to use them directly in ambient‐air conditions. A mathematical model for this behavior is proposed. Issues like resistive heating and material drying are addressed by preparing graphene hybrid hydrogels and by using hygroscopic salts. Two applications are presented as a demonstration of the capabilities of these hydrogels: a soft gripper with two continuum actuators and a soft fingertip capable of changing its volume and stiffness. In addition, the possibility of fabrication by 3D printing technologies enhances the applicability of these promising materials, thus paving the way for innovative developments.
Overcoming crossing barriers between jatropha (Jatropha curcas L.) and castor bean (Ricinus communisL.)

A limitation in improvement of jatropha (Jatropha curcas) has been the low genetic variation among the available germplasm. An alternative to create genetic variability and incorporate desirable traits is through wide crossing. Due to reproductive barriers, wide crossing in jatropha has had limited success. In this experiment, intergeneric hybridization between jatropha and castor bean (Ricinus communis) was performed. In both direct and reciprocal crosses, a few stigma-compatible pollen grains were found. The pollen tube grew normally and reached the style base within an hour after pollination, but the embryo aborted a few days later. This indicated that the hybridization barrier was post-fertilization and thus the ovules were excised, cultured in MS medium supplemented with 1 mg L-1 IAA, and subcultured every four weeks. Finally we obtained one intergeneric hybrid plant, which was vegetatively propagated for further study.
Event‐triggered leader‐follower tracking control for interconnected systems

This article considers the event‐triggered leader‐follower tracking control for interconnected systems with directed communication topology. Different from the existing work, here we consider systems which are physically coupled. We propose a model‐based event‐triggered tracking control strategy and an event triggering rule with a time‐dependent threshold which guarantees that the tracking errors in the systems asymptotically converge to zero. With the proposed event triggering rule, we prove that the system does not exhibit Zeno behavior. As a special case, the proposed event‐triggered tracking control strategy is also applied to decoupled multiagent systems. The efficacy of the proposed method is discussed using two simulation examples.
EAAF: ECC-based anonymous authentication framework for cloud-medical system

With the fast progress of networking and the rising demand of online treatment, there is a need to provide a safe and secure treatment to patient from doctor via communication system. Telecare medical information system (TMIS) provides such facilities in network system. In TMIS, the authenticated doctor can provide online treatment to patient at anytime anywhere. The security and privacy are significant concern for medical information of the patient in healthcare system. For enhancement of security and privacy level, we propose an elliptic curve cryptography (ECC) assisted authentication framework for cloud-medical system. The proposed protocol is secure against active and passive security attacks. Further, our protocol satisfies security attributes in communication channel. The proposed framework is efficient in computation and communication cost. As a result, the proposed framework can be more applicable in the cloud-based medical system.
Speciation, phylogeography, and gene flow in giant salamanders (Dicamptodon)

Giant salamanders of the genus Dicamptodon are members of the mesic forest ecosystem that occurs in the Pacific Northwest of North America. We estimate the phylogeny of the genus to test several hypotheses concerning speciation and the origin of current species distributions. Specifically, we test competing a priori hypotheses of dispersal and vicariance to explain the disjunct inland distribution of the Idaho giant salamander (D. aterrimus) and to test the hypothesis of Pleistocene speciation of Cope’s giant salamander (D. copei) using Bayesian hypothesis testing. We determined that available outgroups were too divergent to root the phylogeny effectively, and we calculated Bayesian posterior probabilities for each of the 15 possible root placements for this four-taxon group. This analysis placed the root on the branch leading to D. aterrimus, indicating that current distribution and speciation of D. aterrimus fit the ancient vicariance hypothesis and are attributable to the orogeny of the Cascade Mountains rather than recent inland dispersal. Furthermore, test results indicate that D. copei is distantly related to other coastal lineages and likely originated much earlier than the Pleistocene. These results suggest that speciation within the genus is attributable to ancient geologic events, while more recent Pleistocene glaciation has shaped genetic variation and distributions within the extant species.
Cybersex with human- and machine-cued partners: Gratifications, shortcomings, and tensions.

From social-network spambots and forensic chatbots to dating simulation games, sexual communication with machines is not uncommon in contemporary culture—however, it remains effectively a black-box phenomenon. There is little empirical research examining how sexual human–machine communication (HMC-S) is experienced, whether it is impactful, or whether it may be similar or different to human–human sexual communication. Advancing our understanding of those questions is vital in understanding the potential for machine partners to foster the health and welfare benefits, as well as the potential to have negative impacts. This study takes a first step in considering experiential parity or divergence by experimentally investigating 271 people’s cybersex experience with a chat partner that was visually and textually cued as a human or a machine. Multimethod analysis suggests there may be no difference in gratifications from sex chat with ostensible machine versus human partners; however, participants seem to experience tensions between the gratifications and shortcomings of cybersex with machine-cued partners.
Using non-invasive sampling methods to determine the prevalence and distribution of Chlamydia pecorum and koala retrovirus in a remnant koala population with conservation importance

Abstract Context. Pathogenic infections are an important consideration for the conservation of native species, but obtaining such data from wild populations can be expensive and difficult. Two pathogens have been implicated in the decline of some koala (Phascolarctos cinereus) populations: urogenital infection with Chlamydia pecorum and koala retrovirus subgroup A (KoRV-A). Pathogen data for a wild koala population of conservation importance in South Gippsland, Victoria are essentially absent. Aims. This study uses non-invasive sampling of koala scats to provide prevalence and genotype data for C. pecorum and KoRV-A in the South Gippsland koala population, and compares pathogen prevalence between wild koalas and koalas in rescue shelters. Methods. C. pecorum and KoRV-A provirus were detected by PCR of DNA isolated from scats collected in the field. Pathogen genetic variation was investigated using DNA sequencing of the C. pecorum ompA and KoRV-A env genes. Key results. C. pecorum and KoRV-A were detected in 61% and 27% of wild South Gippsland individuals tested, respectively. KoRV-A infection tended to be higher in shelter koalas compared with wild koalas. In contrast with other Victorian koala populations sampled, greater pathogen diversity was present in South Gippsland. Conclusions. In the South Gippsland koala population, C. pecorum is widespread and common whereas KoRV appears less prevalent than previously thought. Further work exploring the dynamics of these pathogens in South Gippsland koalas is warranted and may help inform future conservation strategies for this important population. Implications. Non-invasive genetic sampling from scats is a powerful method for obtaining data regarding pathogen prevalence and diversity in wildlife. The use of non-invasive methods for the study of pathogens may help fill research gaps in a way that would be difficult or expensive to achieve using traditional methods.
Human epidermal growth factor receptor 2 (HER2) gene amplification in non-muscle invasive urothelial bladder cancers: Identification of patients for targeted therapy

ABSTRACT Objectives To evaluate human epidermal growth factor receptor 2 (HER2) protein overexpression by immunohistochemistry (IHC) and gene amplification by fluorescent in situ hybridisation (FISH) in urothelial non-muscle-invasive bladder carcinoma (NMIBC), as HER2 is a potential therapeutic target in muscle-invasive bladder carcinoma (MIBC) and HER2 expression and gene amplification in low/high-grade and pTa/pT1 NMIBC is not clear. Patients and methods The study included 93 bladder cancers; 25 MIBC and 68 NMIBC (37 low- and 31 high-grade). All HER2 positive (3+) and equivocal (2+) cases were subjected to FISH using a HER2/CEN 17 dual-colour probe kit. IHC and FISH were scored as per the American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) 2013 Guidelines for breast cancers. Based on the number of signals/nuclei, amplification was categorised as low (≥6–10) and high-level (≥10). Results HER2 2–3+ expression was seen in 29% of NMIBCs (10.8% low- and 51.6% high-grade). HER2 3+ expression was seen in high-grade NMIBC (nine of 31; 29%) and MIBC (nine of 25; 36%). In all, 87% of high-grade NMIBCs were lamina invasive (pT1). Gene amplification was found in 45% (eight of 18) of 3+ tumours. None of the HER2 2+ tumours showed gene amplification. IHC and FISH results were in closest agreement when ≥50% of tumour cells showed 3+ expressions. High-level amplification correlated with increased gene expression on reverse transcriptase-polymerase chain reaction. On multivariate analysis, lower stage, grade, and HER2 expression significantly correlated with progression-free survival. HER2 3+ expression in NMIBC correlated significantly with time to recurrence and progression. Conclusion Our present results show that HER2 FISH should not be performed for HER2 2 + and low-grade NMIBC. This contrasts with breast cancers where it is recommended for equivocal 2+ tumours. About 50% of HER2 3+ MIBC and high-grade NMIBC show HER2 gene amplification and can be potential candidates for HER2-targeted therapy. Abbreviations ASCO/CAP: American Society of Clinical Oncology/College of American Pathologists; DAB: 3,3ʹ-diaminobenzidine; FISH: fluorescent in situ hybridisation; HER2: human epidermal growth factor receptor 2; IHC: immunohistochemistry;(N)MIBC: (non-) muscle-invasive bladder carcinoma; MPUC: micropapillary variant of urothelial bladder cancer; PFS: progression-free survival; TURBT: transurethral resection of bladder tumour