bluuebunny/crossref_metadata_2025 huggingface dataset:
Trojan awakener: detecting dormant malicious hardware using laser logic state imaging (extended version)
Authors: Krachenfels Thilo , Seifert Jean-Pierre , Tajik Shahin
Published: May 2023

The threat of (HTs) and their detection is a widely studied field. While the effort for inserting a Trojan into an (ASIC) can be considered relatively high, especially when trusting the chip manufacturer, programmable hardware is vulnerable to Trojan insertion even after the product has been shipped or during usage. At the same time, detecting dormant HTs with small or zero-overhead triggers and payloads on these platforms is still a challenging task, as the Trojan might not get activated during the chip verification using logical testing or physical measurements. In this work, we present a novel Trojan detection approach based on a technique known from (IC) failure analysis, capable of detecting virtually all classes of dormant Trojans. Using (LLSI), we show how supply voltage modulations can awaken inactive Trojans, making them detectable using laser voltage imaging techniques. Therefore, our technique does not require triggering the Trojan. To support our claims, we present three case studies on 28 nm and 20 nm SRAM- and flash-based (FPGAs). We demonstrate how to detect with high confidence small changes in sequential and combinatorial logic as well as in the routing configuration of FPGAs in a non-invasive manner. Finally, we discuss the practical applicability of our approach on dormant analog Trojans in ASICs.
Recent advances in wheel-rail RCF and wear testing
Authors: Shrestha Sundar , Spiryagin Maksym , Bernal Esteban , Wu Qing , Cole Colin
Published: May 2023

The wear and rolling contact fatigue (RCF) testing approaches for wheels and rails have been reviewed and evaluated in this study. The study points out the advantages and limitations of the existing approaches. The broad analysis revealed that scaled laboratory-based wear testing is widely applied. However, it is necessary to predetermine the input parameters and observing parameters for scaled wear testing for three reasons: first, to emulate the real-world scenarios as closely as possible; second, to postprocess the results received from the scaled testing and transfer them into real practice at full scale; third, to present the results in a legible/appropriate format. Therefore, most of the important parameters required for wear testing have been discussed with fundamental and systematic explanations provided. Additionally, the transition of the parameters from the real-world into the test domain is explained. This study also elaborates on the challenges of the RCF and wear testing processes and concludes by providing major considerations toward successful testing.
Halloysite-gold core-shell nanosystem synergistically enhances thermal conductivity and mechanical properties to optimize the wear-resistance of a pheonlic-PBO/PTFE textile composite liner
Authors: Wang Yanling , Zhang Zhaozhu , Liu Meng , He Yaohui , Li Peilong , Yuan Junya , Yang Mingming , Liu Weimin
Published: May 2023

Polymer-textile liner composites have potential applications in aerospace applications for reducing the abrasion damage of moving parts during operation owing to their self-lubrication, light weight, and high loading capacity. Herein, Au nanoparticles (AuNPs) are successfully loaded into the lumen of halloysite nanotubes (HNTs) to construct an HNTs-Au peasecod core-shell nanosystem to optimize the wear resistance of phenolic resin-based poly(p-phenylene benzobisoxazole) (PBO)/polytetrafluoroethylene (PTFE) textile composites. Transmission electron microscope (TEM) characterization reveals that the AuNPs are well-dispersed inside the HNTs, with an average diameter of 6–9 nm. The anti-wear performance of the HNTs and Au-reinforced PBO/PTFE composites is evaluated using a pin-on-disk friction tester at 100 MPa. Evidently, the addition of HNTs-Au induces a 27.9% decrease in the wear rate of the composites. Possible anti-wear mechanisms are proposed based on the analyzed results of the worn surface morphology and the cross-section of the tribofilm obtained by focused ion beam transmission electron microscopy.
GeoZ: a Region-Based Visualization of Clustering Algorithms
Authors: ElHaj Khalid , Alshamsi Dalal , Aldahan Ala
Published: May 2023

The spatial display of clustered data using machine learning (ML) as regions (bordered areas) is currently unfeasible. This problem is commonly encountered in various research fields that utilize clustering algorithms in their workflow. We present in this study an approach utilizing ML algorithm models that can be trained to any specific dataset to produce decision boundaries. These boundaries are overlaid onto the geographic coordinate system (GCS) to generate geographic clustering regions. The proposed approach is implemented in the Python Package Index (PyPI) as a geovisualization library called geographic decision zones (GeoZ). The efficiency of GeoZ was tested using a dataset of groundwater wells in the State of California. We experimented with 13 different ML models to determine the best model that predicts the existing regional distribution (subbasins). The support vector machine (SVM) algorithm produced a relatively high accuracy score and fulfilled the required criteria better than the other models. Consequently, the tested SVM model with optimized parameters was implemented in the GeoZ open-source library. However, it is important to note that limitations in the application of GeoZ may arise from the nature of the SVM algorithm, as well as the volume, discontinuity, and distribution of the data. We have attempted to address these limitations through various suggestions and solutions.
Biochar from grape pomace, a waste of vitivinicultural origin, is effective for root-knot nematode control
Authors: Martínez-Gómez Ángela , Andrés Maria Fe , Barón-Sola Ángel , Díaz-Manzano Fernando E. , Yousef Ibraheem , Mena Ismael F. , Díaz Elena , Gómez-Torres Óscar , González-Coloma Azucena , Hernández Luis E. , Escobar Carolina
Published: May 2023

Root-knot nematodes (RKNs) are obligate endoparasites that feed on their host plants to complete its life cycle, representing a major threat to agriculture and economy worldwide. The development of new management strategies becomes essential as effective chemical nematicides are progressively being restricted. Hence, we analysed grape pomace-derived biochars, pyrolysed at 350 °C (BC350) and 700 °C (BC700), focusing on their potential for RKN control. The thermal treatment of grape pomace caused an increase in the concentration of carbon and plant macro- and micronutrients, which were largely present in a water-soluble form. Synchrotron radiation-based Fourier transform infrared microspectroscopy data showed a general loss of carboxylic functional groups during pyrolysis, partially contributing to the alkalinisation of both biochars, mostly in BC700. Scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy analysis revealed a highly porous structure filled with different crystals composed of elements such as K, Ca, Mg, P, Si or Al,  which could be a suitable environment for the growth of microorganisms. Biochar-derived aqueous extracts showed phytotoxicity to tomato seedlings at high concentrations, and disappeared upon dilution, but no toxic effect was observed on the nematode’s infective stage. However, the infective and reproductive traits of a Meloidogyne javanica population in tomato were significantly reduced (i.e. egg masses and eggs per plant) in washed-biochar-treated soil in pots (0.75%; BC350W). Therefore, the large amount of grape waste generated after wine production can be transformed into a valuable product such as biochar, effective for RKNs control, thus reducing the waste management problem and contributing to a circular economy.

Graphical abstract
Biochar rate-dependent regulation of extended nitrogen supply by modifying stable aggregates-N and microbial responses
Authors: Ibrahim Muhammed Mustapha , Chang Zhaofeng , Li Zhimin , Joseph Jerry , Yusuf Ado Adamu , Luo Xianzhen , Hou Enqing
Published: May 2023

Besides carbon sequestration, biochar amendment in soils can regulate the loss of applied fertilizer-nitrogen (N) into the environment. Soil aggregates are essential in controlling soil N stocks' stabilization and supply. However, unraveling the rate-dependent impact of biochar on stable soil aggregates and their associated N in fertilized soils over an extended period is a prerequisite to understanding its implications on soil-N dynamics. We unraveled how high and low biochar application rates combined with inorganic fertilizer (20- and 40-tons ha−1 [FB1 and FB2]) affected soil N fractions, stable soil aggregates, aggregates associated-N, and microbial responses to regulate N supply for Nageia nagi after one year. Results revealed that biochar amendment, especially at higher rate, increased the concentration of inorganic N and some amino acids compared to sole fertilizer (F). Available N increased by 16.5% (p = 0.057), 23.8% (p = 0.033), and 34.8% (p = 0.028) in F, FB1, and FB2, respectively, compared to the control (C). Also, 28.1% and 32.8% significant increases in the availability of NH4+-N were recorded in FB1 and FB2, respectively, compared to F. NO3−-N availability was significantly increased by 15.2%, 21.8%, and 20.8% in FB1, FB2, and C, compared to F. Biochar amendment, irrespective of rate, increased stable microaggregates (< 0.25 mm). However, FB2 significantly increased macro- and intermediate-aggregate-N, and urease activity, and hence higher N supply capacity to meet the N need of N. nagi even after one year. Hence, the N content of N. nagi was 41.3%, 28.8%, and 12.2% higher in FB2, FB1, and F, respectively, compared to the control. Biochar amendment decreased bacterial species diversity but increased the proportion of NH4+-oxidizers (especially the Betaproteobacteria) to maintain the mineralization and slow release of N. Although a low biochar rate was more beneficial than sole fertilization, higher biochar application rate could sustain higher N supply by stabilizing soil microaggregates and increasing macro- and intermediate-aggregates N, its mineralization, and slow-release over longer periods.
Money in South-Central Africa, 1890–1931: Africans, Imperial Sterling, and Colonial Economy-Building
Authors: Nyamunda Tinashe , Mseba Admire
Published: May 2023

In South-Central Africa, British mining companies shadowed colonial monetization in an assertive and coercive manner. In the emerging settler states, African money users were obliged to adjust to colonial money for the payment of tax and transactions. Yet they often found it difficult to obtain access to colonial currency. Company rule in the region was initially closely connected to the South African economy, but currencies separated as a result of South Africa’s economy building in the 1920s. Nyamunda and Mseba tell the story of the struggles of African money users in engaging with colonial currency.
Serving the People or the People's Note: On the Political Economy of Talent Allocation
Authors: Xiao Kezhou
Published: May 2023

An efficient allocation of talents through occupational choice is central to modern economic growth. Removing developmental barriers unfavorable to entrepreneurship and artificially imposed for political reasons (i.e., the cage theory) might be a plausible channel for China's superb economic performance. Using a newly compiled dataset on China's Super Rich Persons, the regression kink design reports supportive evidence on the politically induced structural change in the social composition of entrepreneurs using Deng Xiaoping's Southern Talks as an event shock. Consistent with a pro-market talent allocation framework, this article finds that (1) the share of super-rich entrepreneurs with state sector experience and a college degree declined, suggesting that the period of the Southern Talks opened a window of opportunity for venturing, and (2) the effects on the attributes of the parental father of the entrepreneurs are somewhat limited.
On the spectral theory of groups of automorphisms of S-adic nilmanifolds
Authors: BEKKA BACHIR , GUIVARC’H YVES
Published: May 2023

Let
$S=\{p_1, \ldots , p_r,\infty \}$
for prime integers
$p_1, \ldots , p_r.$
Let X be an S-adic compact nilmanifold, equipped with the unique translation-invariant probability measure
$\mu .$
We characterize the countable groups
$\Gamma $
of automorphisms of X for which the Koopman representation
$\kappa $
on
$L^2(X,\mu )$
has a spectral gap. More specifically, let Y be the maximal quotient solenoid of X (thus, Y is a finite-dimensional, connected, compact abelian group). We show that
$\kappa $
does not have a spectral gap if and only if there exists a
$\Gamma $
-invariant proper subsolenoid of Y on which
$\Gamma $
acts as a virtually abelian group,
You Are the Now of God:Christus Vivitand the Need for a Theological Anthropology of Youth
Authors: Cameron Cynthia L.
Published: May 2023

Adolescents and young adults are generally missing from Catholic theological reflection on what it means to be a human person. However, Pope Francis's 2019 Apostolic Exhortation,Christus Vivit, reveals an operative theological anthropology of young people as inherently good and of adolescence and young adulthood as a life stage that is good in its own right. This, then, can serve as a foundation for a more robust theological consideration of adolescents and young adults in Catholic theological anthropology, in general, and in our understandings of the doctrines of theimago Dei, sin, and grace, in particular.
The Artemis Accords
Authors: Bartóki-Gönczy Balázs , Nagy Boldizsár
Published: May 2023

The Artemis Accords (the Accords) reproduced below were signed on September 13, 2020, by the administrator of the U.S. space agency, NASA, and seven other space agencies. The intervening years since then have underscored their importance: they may give a boost to the development of the legal regime of outer space exploration and use as defined by the existing treaty framework, while supporting the U.S. interpretation of the non-appropriation principle, or they may upset the existing legal regime of Outer Space, leading to its fragmentation by abandoning multilateralism. This introductory note highlights those aspects of the Accords that may affect the edifice of the international law relating to Outer Space, even if the Accords themselves are not legally binding, as explained briefly below.
What next for student mental health?
Authors: Wessely Simon
Published: May 2023

When I became President of the UK Royal College of Psychiatrists, I rashly promised to visit every UK medical school to talk with students about mental health. In this article, I share my impressions after concluding this ‘grand tour’ and ponder the dangers of creating the false impression that universities are ‘toxic’ for mental health.
“The Shah's House Became the People's House”: Narrating Iran's Modern History at the Pahlavi Dynasty Museum
Authors: Bazyar Marziyeh , Steele Robert
Published: May 2023

This paper examines the Pahlavi Dynasty Museum, which was inaugurated in 1976 during the celebrations marking the fiftieth anniversary of Pahlavi rule. Built inside the Marble Palace, the shah's former residence in the center of Tehran, the museum was intended to memorialize the achievements of the Pahlavis, presenting the official Pahlavi version of Iran's modern history. The museum was unique in many respects, not least because it was the only former Pahlavi palace that had been converted into a museum to honor the Pahlavis, but it shared the objectives of other museums constructed during this period. During the late Pahlavi era, a major aspect of the state's cultural policy was to sponsor initiatives that strengthened the official state narrative, which argued that the Pahlavis were the legitimate heirs of a 2500-year-old monarchical tradition. The article explores how the state attempted to express these narratives through the museum's design and exhibits.
Bridging the gap between the economics lab and the field: Dictator games and donations
Authors: Wang Xinghua , Navarro-Martinez Daniel
Published: May 2023

There is growing concern about the extent to which economic games played in the laboratory generalize to social behaviors outside the lab. Here, we show that it is possible to make a game much more predictive of field behavior by bringing contextual elements from the field to the lab. We report three experiments where we present the same participants with different versions of the dictator game and with two different field situations. The games are designed to include elements that make them progressively more similar to the field. We find a dramatic increase in lab–field correlations as contextual elements are incorporated, which has wide-ranging implications for experiments on economic decision making.
Efficient prediction of turbulent flow quantities using a Bayesian hierarchical multifidelity model
Authors: Rezaeiravesh S. , Mukha T. , Schlatter P.
Published: May 2023

Multifidelity models (MFMs) can be used to construct predictive models for flow quantities of interest (QoIs) over the space of uncertain/design parameters, with the purpose of uncertainty quantification, data fusion and optimization. For numerical simulation of turbulence, there is a hierarchy of methodologies ranked by accuracy and cost, where each methodology may have several numerical/modelling parameters that control the predictive accuracy and robustness of its resulting outputs. Compatible with these specifications, the present hierarchical MFM strategy allows for simultaneous calibration of the fidelity-specific parameters in a Bayesian framework as developed by Gohet al.(Technometrics, vol. 55, no. 4, 2013, pp. 501–512). The purpose of the MFM is to provide an improved prediction, mainly interpolation over the range covered by training data, by combining lower- and higher-fidelity data in an optimal way for any number of fidelity levels; even providing confidence intervals for the resulting QoI. The capabilities of the MFM are first demonstrated on an illustrative toy problem, and it is then applied to three realistic cases relevant to engineering turbulent flows. The latter include the prediction of friction at different Reynolds numbers in turbulent channel flow, the prediction of aerodynamic coefficients for a range of angles of attack of a standard airfoil and the uncertainty propagation and sensitivity analysis of the separation bubble in the turbulent flow over periodic hills subject to geometrical uncertainties. In all cases, based on only a few high-fidelity data samples, the MFM leads to accurate predictions of the QoIs. The result of the uncertainty quantification and sensitivity analyses are also found to be accurate compared with the ground truth in each case.
Body-force modelling in thermal compressible flows with the lattice Boltzmann method
Authors: Li Zuoxu , Shan Xiaowen
Published: May 2023

Body-force modelling in the lattice Boltzmann method (LBM) has been studied extensively in the incompressible limit but rarely discussed for thermal compressible flows. Here we present a systematic approach of incorporating body force in the LBM which is valid for thermal compressible and non-equilibrium flows. In particular, a LBM forcing scheme accurate for the energy equation with second-order time accuracy is given. New and essential in this scheme is the third-moment contribution of the force term. It is shown via Chapman–Enskog analysis that the absence of this contribution causes an erroneous heat flux quadratic in Mach number and linear in temperature variation. The theoretical findings are verified and the necessity of the third-moment contribution is demonstrated by numerical simulations.
Effect of different production methods on quality parameters of Hatay Künefe cheese
Authors: Güzeler Nuray , Çay Ahmet Refik , Koboyeva Firuza , Esen Mustafa Kadir
Published: May 2023

We investigated four different production methods of Künefe cheese, emphasizing their industrial importance. The four methods used fresh Künefe cheese (FKC), salted Künefe cheese (SKC), Boru type Künefe cheese (BKC) and culture-added processed Künefe cheese (CPKC), all used in the production of Künefe, a syrupy dessert unique to the Middle East. FKC was produced as a result of curd formation from raw milk with rennet and then the fermentation of curd. SKC was manufactured using the salting method in addition to FKC production. BKC was obtained using the dry cooking process with emulsifying salts applied to cheese curd. CPKC was produced by applying heat treatment to raw milk and using starter culture before adding rennet that was different to Boru-type Künefe cheese. The composition, color, meltability, texture and sensory properties of the Künefe cheeses were examined. As a result of statistical analysis, it was determined that the effect of different production methods on the composition, meltability, texture (except springiness and cohesiveness) and sensory properties was significant in all cheeses (P < 0.05). CKPC was the most appropriate cheese in various properties.
Surgical anatomy of posterior tympanotomy: influence of the retrotympanum on round window exposure
Authors: Maccarrone Francesco , Molinari Giulia , Fermi Matteo , Alicandri-Ciufelli Matteo , Presutti Livio , Tassi Sauro , Villari Domenico , Negri Maurizio
Published: May 2023

Objectives

To describe how the retrotympanic structures could influence the visibility of the round window niche and the round window membrane during cochlear implant surgery, and to investigate if a round window approach is possible even in cases with unfavourable anatomy.

Methods

Video recordings from 37 patients who underwent cochlear implantation were reviewed. The visibility of the round window niche and round window membrane at different timepoints was assessed according to a modified version of the Saint Thomas Hospital classification. The structures that concealed the round window niche and round window membrane were evaluated.

Results

After posterior tympanotomy, 54 per cent of cases had limited exposure (classes IIa, IIb and III) of the round window niche. After remodelling the retrotympanum, round window niche visibility significantly increased, with 100 per cent class I and IIa cases. Following remodelling of the round window niche, visibility of more than 50 per cent of the round window membrane surface was achieved in 100 per cent of cases.

Conclusion

Remodelling the retrotympanum and the round window niche significantly increased exposure of the round window niche and round window membrane respectively, allowing round window insertion in all cases.
Unsupervised classification of fully kinetic simulations of plasmoid instability using self-organizing maps (SOMs)
Authors: Köhne Sophia , Boella Elisabetta , Innocenti Maria Elena
Published: May 2023

The growing amount of data produced by simulations and observations of space physics processes encourages the use of methods rooted in machine learning for data analysis and physical discovery. We apply a clustering method based on self-organizing maps to fully kinetic simulations of plasmoid instability, with the aim of assessing their suitability as a reliable analysis tool for both simulated and observed data. We obtain clusters that map well,a posteriori, to our knowledge of the process; the clusters clearly identify the inflow region, the inner plasmoid region, the separatrices and regions associated with plasmoid merging. Self-organizing map-specific analysis tools, such as feature maps and the unified distance matrix, provide us with valuable insights into both the physics at work and specific spatial regions of interest. The method appears as a promising option for the analysis of data, both from simulations and from observations, and could also potentially be used to trigger the switch to different simulation models or resolution in coupled codes for space simulations.
Heartworms in Halichoerus grypus: first records of Acanthocheilonema spirocauda (Onchocercidae; Filarioidea) in 2 grey seals from the North Sea
Authors: Lehnert Kristina , Herzog Insa , Boyi Joy Ometere , Gross Stephanie , Wohlsein Peter , Ewers Christa , Prenger-Berninghoff Ellen , Siebert Ursula
Published: May 2023

The assumed definitive host of the heartworm Acanthocheilonema spirocauda (Onchocerdidae; Filarioidea) is the harbour seal (Phoca vitulina). This filaroid nematode parasitizing in cardiac ventricles and blood vessel lumina of harbour seals (P. vitulina) has a low prevalence and seldom causes severe health impacts. The seal louse (Echinophthirius horridus) is the assumed intermediate host for transmission of A. spirocauda filariae between seals, comprising a unique parasite assembly conveyed from the terrestrial ancestors of pinnipeds. Although grey seals (Halichoerus grypus) are infected by seal lice, heartworm infection was not verified. Analysing a longterm dataset compiled over decades (1996–2021) of health monitoring seals along the German coasts comprising post mortem investigations and archived parasites, 2 cases of A. spirocauda infected male grey seals were detected. Tentative morphological identification was confirmed with molecular tools by sequencing a section of mtDNA COI and comparing nucleotide data with available heartworm sequence. This is the first record of heartworm individuals collected from the heart of grey seals at necropsy. It remains puzzling why heartworm infection occur much less frequently in grey than in harbour seals, although both species use the same habitat, share mixed haul-outs and consume similar prey species. If transmission occurs directly via seal louse vectors on haul-outs, increasing seal populations in the North- and Baltic Sea could have density dependent effects on prevalence of heartworm and seal louse infections. It remains to be shown how species-specificity of filarial nematodes as well as immune system traits of grey seals influence infection patterns of A. spirocauda.
Host phylogeny and seasonality shapes avian haemosporidian prevalence in a Brazilian biodiverse and dry forest: the Caatinga
Authors: de Angeli Dutra Daniela , Khan Asmat U. , Ferreira Francisco C. , Beirão Marina V. , Pichorim Mauro , Moreira Patrícia A. , Braga Érika M.
Published: May 2023

The relationships between host phylogenetics, functional traits and parasites in wildlife remain poorly understood in the Neotropics, especially in habitats with marked seasonal variation. Here, we examined the effect of seasonality and host functional traits on the prevalence of avian haemosporidians (Plasmodium and Haemoproteus) in the Brazilian Caatinga, a seasonally dry tropical forest. 933 birds were evaluated for haemosporidian infections. We found a high parasitism prevalence (51.2%), which was correlated with phylogenetic relatedness among avian species. Prevalence varied drastically among the 20 well-sampled species, ranging from 0 to 70%. Seasonality was the main factor associated with infections, but how this abiotic condition influenced parasite prevalence varied according to the host-parasite system. Plasmodium prevalence increased during the rainy season and, after excluding the large sample size of Columbiformes (n = 462/933), Plasmodium infection rate was maintained high in the wet season and showed a negative association with host body mass. No association was found between non-Columbiform bird prevalence and seasonality or body mass when evaluating both Plasmodium and Haemoproteus or only Haemoproteus infections. Parasite community was composed of 32 lineages including 7 new lineages. We evidenced that even dry domains can harbour a high prevalence and diversity of vector-borne parasites and pointed out seasonality as a ruling factor.
Masturbatory insanity: the history of an idea, revisited
Authors: Zachar Peter , Kendler Kenneth S.
Published: May 2023

In the eighteenth century, masturbation was extended from the moral to the medical sphere and conceptualized as being the cause of various deteriorative physical illnesses. In the nineteenth century, psychiatrists accepted that difficult to control masturbation was a feature of many mental disorders. They also believed that masturbation could play a casual role in a specific type of insanity with a distinctive natural history. In 1962, E.H. Hare published an article on the concept of masturbatory insanity that became an important explication of the masturbation and mental illness relationship in the history of psychiatry. Historical research published subsequent to Hare's article suggests several updates to his analysis. Hare did not note that the masturbation and mental illness relationship was promoted to the general public by quacks peddling quick cures. Hare emphasized psychiatrists’ condemnatory language only, neglecting the aspiration of psychiatrists to treat disorders caused by excessive masturbation, not punish the sin of masturbation. Hare recognized the importance of hebephrenia and neurasthenia to this history but attributed the decline of masturbation related mental illness in part to the rejection of an irrational, unscientific hypotheses about masturbation's causal role. As an alternative, we suggest that before the causal role of masturbation was widely abandoned, the concepts of hebephrenia and neurasthenia gained a competitive advantage and became primary diagnoses for cases that once would have been conceptualized as masturbatory insanity.
Dual arm coordination of redundant space manipulators mounted on a spacecraft
Authors: Kalaycioglu Serdar , de Ruiter Anton
Published: May 2023

The paper addresses a significant challenge in on-orbit robotics servicing and assembly, which is to overcome the saturation setback of force/torque on robot joint and spacecraft actuators during the post-capture stage while controlling a target spacecraft with uncontrolled large angular and linear momentums. The authors propose a novel solution based on two robust and efficient control algorithms: Optimal Control Allocation (OCA) and Non-linear Model Predictive Control (NMPC). Both algorithms aim to minimize joint torques, spacecraft actuator moments, contact forces, and moments of a compound redundant system that includes a common payload (target spacecraft) grasped by dual n-degree space robotics manipulators mounted on a chaser spacecraft. The OCA algorithm minimizes a quadratic cost function using only the current states and the system dynamics, but the NMPC also considers the future state estimates and the control inputs over a specified prediction horizon. It is computationally more involved but provides superior results in reducing joint torques. The literature to date in application of MPC to robotics mainly focuses on linear models but the dual arm coordination is highly non-linear and there is no MPC application on dual arm coordination. The proposed discretized technique offers exact realizations (of a non-linear model) with elegance and simplicity and yet considers the full non-linear model of the dual arm coordinating system. It is computationally very efficient. The computer simulation results show that the proposed algorithms work efficiently, and the minimum torques, contact forces, and moments are realized. The developed algorithm also is very efficient in tracking problems.
Children’s acquisition of word order variation: A study of subject placement in embedded clauses in Norwegian
Authors: RINGSTAD Tina , WESTERGAARD Marit
Published: May 2023

Norwegian embedded clauses give children two options for subject placement: preceding or following negation (S-Neg/Neg-S). In the adult language, S-Neg is the ‘default’ and highly frequent option, and Neg-S is infrequent in children’s input. However, Neg-S may be argued to be the structurally less complex. We investigate whether children are aware of the existence of both subject positions, and if they prefer the more frequent or the less complex position. Through an elicited production task with monolingual Norwegian children (N=33, age 3;1-6;1) we find that children in general overuse the Neg-S option, and we suggest that children have an inherent preference for the less complex position, due to a principle of structural economy. We also find that a group of children display U-shaped development, first using only S-Neg, then only Neg-S and finally S-Neg again, and we relate this to structure building and economy of movement.
Realistic and broad-scope learning simulations: first results and challenges
Authors: de SEYSSEL Maureen , LAVECHIN Marvin , DUPOUX Emmanuel
Published: May 2023

There is a current ‘theory crisis’ in language acquisition research, resulting from fragmentation both at the level of the approaches and the linguistic level studied. We identify a need for integrative approaches that go beyond these limitations, and propose to analyse the strengths and weaknesses of current theoretical approaches of language acquisition. In particular, we advocate that language learning simulations, if they integrate realistic input and multiple levels of language, have the potential to contribute significantly to our understanding of language acquisition. We then review recent results obtained through such language learning simulations. Finally, we propose some guidelines for the community to build better simulations.
How valid is the 2- to 10-day incubation period for cases of Legionnaires’ disease?: A reappraisal in the context of the German LeTriWa study; Berlin, 2016–2020
Authors: Lehfeld Ann-Sophie , Petzold Markus , Brodhun Bonita , Haas Walter , Buchholz Udo
Published: May 2023

The evidence for the incubation period of Legionnaires’ disease is based on data from a small number of outbreaks. An incubation period of 2–10 days is commonly used for the definition and investigation of cases. In the German LeTriWa study, we collaborated with public health departments to identify evidence-based sources of exposure among cases of Legionnaires’ disease within 1–14 days before symptom onset. For each individual, we assigned weights to the numbered days of exposure before symptom onset, giving the highest weight to exposure days of cases with only one possible day of exposure. We then calculated an incubation period distribution where the median was 5 days and the mode was 6 days. The cumulative distribution reached 89% by the 10th day before symptom onset. One case-patient with immunosuppression had a single day of exposure to the likely infection source only 1 day before symptom onset. Overall, our results support the 2- to 10-day incubation period used in case definition, investigation, and surveillance of cases with Legionnaires’ disease.
Doing Harm: A Reply to Klocksiem
Authors: Carlson Erik , Johansson Jens , Risberg Olle
Published: May 2023

In a recent article in this journal, Justin Klocksiem proposes a novel response to the widely discussed failure to benefit problem for the counterfactual comparative account of harm (CCA). According to Klocksiem, proponents of CCA can deal with this problem by distinguishing between facts about there being harm and facts about an agent's having done harm. In this reply, we raise three sets of problems for Klocksiem's approach.
Migration and decentralised industrialisation: the development of rural migration in northern Sweden (1850–1950)
Authors: Sundvall Samuel
Published: May 2023

This article investigates the development of rural migration in northern Sweden (1850–1950). During this period, northern Sweden experienced a slower rate of urbanisation than the rest of the country. This study proposes that decentralised industrialisation (i.e., rural-industrial labour, predominantly in the timber industry) introduced inertia to the urbanisation process by lowering the rate of rural-to-urban migration. Using longitudinal, individual-level data from the county of Västerbotten, the development of migration rates and migrant characteristics is explored via descriptive statistics. The rural population’s development and migration patterns closely correlate to the development of decentralised industrialisation. The results, therefore, indicate that decentralised industrialisation is a viable model for explaining the slow rate of urbanisation in northern Sweden.
Minds on Fire: Cognitive Aspects of Early Firemaking and the Possible Inventors of Firemaking Kits
Authors: Lombard Marlize , Gärdenfors Peter
Published: May 2023

Thus far, most researchers have focused on the cognition of fire use, but few have explored the cognition of firemaking. With this contribution we analyse aspects of the two main hunter-gatherer firemaking techniques—the strike-a-light and the manual fire-drill—in terms of causal, social and prospective reasoning. Based on geographic distribution, archaeological and ethnographic information, as well as our cognitive interpretation of strike-a-light firemaking, we suggest that this technique may well have been invented by Neanderthal populations in Eurasia. Fire-drills, on the other hand, represent a rudimentary form of a symbiotic technology, which requires more elaborate prospective and causal reasoning skills. This firemaking technology may have been invented by differentHomo sapiensgroups roaming the African savanna before populating the rest of the globe, where fire-drills remain the most-used hunter-gatherer firemaking technique.
Modular designs at the Early Byzantine pilgrimage site of Philoxenite, Egypt
Authors: Gwiazda Mariusz
Published: May 2023

New research at the site of Philoxenite in northern Egypt has identified six large building complexes, each based on a modular design. Each building is composed of replicated segments and dates to the 6th c. CE. This approach to design, used at Philoxenite, is not seen elsewhere on such a scale at this date. Nevertheless, modular design was deeply rooted in the construction traditions of the Roman and Early Byzantine periods, when it was used primarily for shops, warehouses, and cisterns. In Philoxenite, it was used to erect a town district that catered to the needs of pilgrims heading from Alexandria to Abū Mīnā, the largest Christian sanctuary at the time.
Tra aerofotointerpretazione e indagini sul campo: linee di ricerca per la ricostruzione dell'insediamento di Nuceriola (Benevento, Italia)
Authors: De Vita Cristiano Benedetto , Limongiello Marco , Musmeci Daniela , Santoriello Alfonso
Published: May 2023

L'insediamento antico di Nuceriola lungo la via Appia (Benevento, Italia) rappresenta un interessante contesto per lo studio delle forme insediative nel territorio del Sannio. Con un arco di vita che va dal IV sec. a.C. al VI sec. d.C., privo di superfetazioni postantiche, esso è diventato un punto di osservazione privilegiato per il progetto Ancient Appia Landscapes (Università di Salerno), in particolare in rapporto ai temi dell'espansionismo romano di età mediorepubblicana, alle forme insediative del mondo rurale, alla viabilità antica. Nel presente contributo sono presentati i risultati dell'analisi fotointerpretativa effettuata su supporti aerofotografici disponibili o creati ex novo: tali dati, coadiuvati dalle informazioni delle attività di scavo, delle prospezioni geofisiche e delle ricognizioni di superficie, delineano un quadro organico della forma dell'insediamento e consentono di proporre un “disegno” suggestivo in grado di arricchire l'ancora poco ampio panorama di conoscenze riferibili allo studio degli abitati minori di questa parte del Sannio.
Geographic variability in limited English proficiency: A cross-cultural study of cognitive profiles
Authors: Crișan Iulia , Ali Sami , Cutler Laura , Matei Alina , Avram Luisa , Erdodi Laszlo A
Published: May 2023

Objective:

This study was designed to evaluate the effect of limited English proficiency (LEP) on neurocognitive profiles.

Method:

Romanian (LEP-RO; n = 59) and Arabic (LEP-AR; n = 30) native speakers were compared to Canadian native speakers of English (NSE; n = 24) on a strategically selected battery of neuropsychological tests.

Results:

As predicted, participants with LEP demonstrated significantly lower performance on tests with high verbal mediation relative to US norms and the NSE sample (large effects). In contrast, several tests with low verbal mediation were robust to LEP. However, clinically relevant deviations from this general pattern were observed. The level of English proficiency varied significantly within the LEP-RO and was associated with a predictable performance pattern on tests with high verbal mediation.

Conclusions:

The heterogeneity in cognitive profiles among individuals with LEP challenges the notion that LEP status is a unitary construct. The level of verbal mediation is an imperfect predictor of the performance of LEP examinees during neuropsychological testing. Several commonly used measures were identified that are robust to the deleterious effects of LEP. Administering tests in the examinee’s native language may not be the optimal solution to contain the confounding effect of LEP in cognitive evaluations.
Listening like a native: Unprofitable procedures need to be discarded
Authors: Bruggeman Laurence , Cutler Anne
Published: May 2023

Two languages, historically related, both have lexical stress, with word stress distinctions signalled in each by the same suprasegmental cues. In each language, words can overlap segmentally but differ in placement of primary versus secondary stress (OCtopus, ocTOber). However, secondary stress occurs more often in the words of one language, Dutch, than in the other, English, and largely because of this, Dutch listeners find it helpful to use suprasegmental stress cues when recognising spoken words. English listeners, in contrast, do not; indeed, Dutch listeners can outdo English listeners in correctly identifying the source words of English word fragments (oc-). Here we show that Dutch-native listeners who reside in an English-speaking environment and have become dominant in English, though still maintaining their use of these stress cues in their L1, ignore the same cues in their L2 English, performing as poorly in the fragment identification task as the L1 English do.
RANK JUMPS AND GROWTH OF SHAFAREVICH–TATE GROUPS FOR ELLIPTIC CURVES IN -EXTENSIONS
Authors: BENEISH LEA , KUNDU DEBANJANA , RAY ANWESH
Published: May 2023

Let p be a prime. In this paper, we use techniques from Iwasawa theory to study questions about rank jump of elliptic curves in cyclic extensions of degree p. We also study growth of the p-primary Selmer group and the Shafarevich–Tate group in cyclic degree-p extensions and improve upon previously known results in this direction.
Byronids and similar tubular fossils from the Devonian of the Barrandian area (Czech Republic)
Authors: MERGL Michal , KRAFT Petr
Published: May 2023

Byronids are problematic fossils of possible cnidarian affinity, only rarely reported from the Devonian, but never previously studied in the Barrandian area, Czech Republic. Two new species Prestephanoscyphus branzovensis sp. nov. and Prestephanoscyphus robustus sp. nov. are erected from the Lochkovian and the Eifelian, respectively. Four poorly known species referred to Byronia are described in open nomenclature from the Emsian and Eifelian. The new genus Parabyronia gen. nov. with the type species Parabyronia elegans sp. nov. is closely related to other sphenothallids but is distinguished by transverse ridges on its theca and short spines at the apertural end of the theca. Definite identification of phosphatic rings as the attachment structure of byronids was proved by new material of the Lochkovian age. A dwarf conularia Pidiconularia gen. nov. with the type species Pidiconularia tubulata sp. nov. is remarkable by its minute size and very fine ornament; its conulariid affinity is proved by subrectangular cross-section and four internal carinae. Microstructure of theca of Prestephanoscyphus is characterised by alternation of compact laminae of aligned columnar microcrystallites and chambered laminae with isometric microcrystallites of apatite. Accretionary growth of byronid theca and structure of the holdfast with basal opening for the adhesive pedal disc support their cnidarian affinity although they likely display the bilateral instead of tetramerous symmetry. The protective function of bilaterally symmetrical whorls of internal apophyses in Prestephanoscyphus is suggested and their role in strengthening of thecal wall or supporting function of gastric septa are disputed. The byronids are regarded as epibionts rather than attached to the rocks. They are representatives of benthic groups with phosphatic shells that declined with decreasing availability of phosphorus in seas and oceans.
A multiband truncated patch antenna based on EBG structure for IoMT and 5G networks
Authors: Raj Saurabh , Mishra Piyush Kumar , Tripathi Vijay Shanker
Published: May 2023

In this paper, a truncated patch antenna based on the electromagnetic band gap (EBG) structure has been proposed. The fabricated antenna has five operating frequencies at 10.4, 15.68, 19.68, 27.2, and 35.04 GHz. The fabricated prototype of the antenna constitutes a truncated rectangular patch etched with the shape of a symmetrical slot (on top) and an EBG loaded on the ground plane of the dielectric substrate. The optimized volume of the antenna is 20 × 15 × 1.57 mm3. The proposed antenna gives a good radiation pattern for the E-H field in all covered bandwidth and also achieved better performances related to the reference papers. A multiband antenna also covered the 5 G bandwidth, which resonates at 27.2 GHz from 24.2 GHz to 27.84 GHz bandwidth and at 35.04 GHz from 33.84 GHz to 36.2 GHz bandwidth, which can be used in the Internet of Medical Things. On the other hand, X/Ku/K frequency bands have been committed for wireless communication where the multiband antenna can be used to help in monitoring, especially in the case of data transmission from radio frequency sensors to health-care system in real-time applications.
Influence of burial depth and soil disturbance on the emergence of common weed species in the Iberian Peninsula
Authors: Sousa-Ortega Carlos , Leon Ramon G. , Lopez-Martinez Nuria , Castro-Valdecantos Pedro
Published: May 2023

North African knapweed (Centaurea diluta Aiton), cornflower (Centaurea cyanus L.), corn marigold [Glebionis segetum (L.) Fourr.], rigid ryegrass (Lolium rigidum Gaudin), and corn poppy (Papaver rhoeas L.) are weeds of economic importance in the Iberian Peninsula, particularly due to limited herbicide options for effective control. For this reason, information about their seedling emergence has become critical to develop effective integrated management strategies and better time control actions. The aims of this study were to evaluate the effect of seed burial depth and soil disturbance on the emergence of these weed species. Two pot experiments were carried out to (1) quantify seedling emergence at three burial depths (2, 5, and 9 cm) and (2) characterize seedling emergence in response to different frequencies and timings of soil disturbance. Burial depth limited the emergence of G. segetum and P. rhoeas at 5 and 9 cm, respectively; while seedling emergence of C. diluta, C. cyanus, and L. rigidum were reduced by 92%, 90%, and 67% at 9 cm compared with 2 cm, respectively. Two or more sequential soil disturbance events increased total seedling emergence of C. diluta, P. rhoeas, and G. segetum compared with single events, while L. rigidum did not respond to repeated soil disturbance. These results suggest that turning the soil to bury weed seeds down to 5 cm or deeper would be a very effective method to control G. segetum and P. rhoeas and moderately effective to control C. cyanus. Also, the use of a stale seedbed would have some efficacy to reduce P. rhoeas and C. diluta weed pressure within the crop. This study illustrates how differences among species in seedling emergence in response to soil depth and disturbance can determine distinct emergence patterns ultimately influencing the selection of weed control tools and timing.