bluuebunny/crossref_metadata_2025 huggingface dataset:
Discrete collective estimation in swarm robotics with distributed Bayesian belief sharing
Authors: Shan Qihao , Mostaghim Sanaz
Published: September 2021

Multi-option collective decision-making is a challenging task in the context of swarm intelligence. In this paper, we extend the problem of collective perception from simple binary decision-making of choosing the color in majority to estimating the most likely fill ratio from a series of discrete fill ratio hypotheses. We have applied direct comparison (DC) and direct modulation of voter-based decisions (DMVD) to this scenario to observe their performances in a discrete collective estimation problem. We have also compared their performances against an Individual Exploration baseline. Additionally, we propose a novel collective decision-making strategy called distributed Bayesian belief sharing (DBBS) and apply it to the above discrete collective estimation problem. In the experiments, we explore the performances of considered collective decision-making algorithms in various parameter settings to determine the trade-off among accuracy, speed, message transfer and reliability in the decision-making process. Our results show that both DC and DMVD outperform the Individual Exploration baseline, but both algorithms exhibit different trade-offs with respect to accuracy and decision speed. On the other hand, DBBS exceeds the performances of all other considered algorithms in all four metrics, at the cost of higher communication complexity.
Fatal pulmonary thromboembolism in asymptomatic COVID-19
Authors: Keane Gerard , Dorman Tony
Published: September 2021

Background

Coronavirus disease 2019 (COVID-19) has claimed the lives of millions of people globally.

Aims

This study aims to identify the pathological findings at autopsy of asymptomatic COVID-19 death, to compare the incidence of acute bilateral pulmonary thromboembolism (ABPTE) in asymptomatic COVID-19 deaths versus non-COVID-19 deaths and to explore the possible pathogenesis of thrombosis in COVID-19. We also consider the place of COVID-19 in the death certification of 4 cases who died from ABPTE.

Methods

This study primarily reviewed post-mortem reports of 6 asymptomatic COVID-19 deaths. Post-mortem reports for the years 2019 and 2020 were also reviewed to establish the incidence of ABPTE. Each post-mortem report was reviewed for gross examination, histology and toxicology findings. A literature review on COVID-19 autopsy findings, COVID-19 pathogenesis, thrombosis in COVID-19 and asymptomatic SARS-CoV-2 infection was also conducted using PubMed.

Results

Of the 6 asymptomatic COVID-19 deaths, 4 died as a result of ABPTE, 1 died of ischaemic and hypertensive cardiac disease caused by coronary artery disease and ventricular hypertrophy and the remaining case died of heart failure due to dilated cardiomyopathy caused by subendocardial fibrosis. There were 2 cases of bilateral pulmonary thromboembolism (BPTE) in 2019 out of 140 post-mortems. Excluding the 4 cases of ABPTE described already, there was 1 case of ABPTE in 2020 out of 156 post-mortems. A literature review on the pathogenesis of thrombosis in COVID-19 highlighted the significant role that the endothelium plays.

Conclusions

Massive pulmonary thromboembolism may be a significant cause of death in asymptomatic COVID-19 infection.
Does religious social capital affect farmland transactions? A spatial autoregressive analysis in Taiwan
Authors: Chang Tsaiyu
Published: September 2021

This study aims to empirically determine whether social capital affects farmland transactions in Taiwan. It uses a geographic information system to link the village-level data of the largest national farmland survey with the village-level data of religious groups, which are the most widely distributed civil society organizations. The combined data are analyzed using a spatial self-retrogression model. After controlling for farmland spatial adjacency, an increase in social capital brought an increase in the percentage of active leased farmland and a drop in the percentage of fallow farmland. Analysis of the 2015 cross-sectional data revealed that social capital was strongly conducive to the efficient allocation of farmland resources. While belong to irrigation associations can help to allocate farmland resources (as expected), this allocation is more greatly facilitated by the combination of religion and other traditions. Social capital in Taiwan helped to reduce the density of abandoned farmland, especially Daoist temples in religious communities. This study also used panel data to examine changes in within-village farmland tenancy rates. This analysis found that the identified effects of social capital may decline over time.
Navigating Changing Norms Around Sex in Dating Relationships: A Qualitative Study of Young People in Vietnam
Authors: Bergenfeld Irina , Tamler Ilyssa , Sales Jessica M. , Trang Quach Thu , Minh Tran Hung , Yount Kathryn M.
Published: September 2021

Social and economic changes in Vietnam since the economic restructuring of the 1980s have caused a shift in norms about premarital sex. While expectations of female chastity remain, sex before marriage is becoming more common among young people. As the formative phase of a parent randomized controlled trial, the present study examined the normative context of sex in dating relationships from the perspectives of young women and men in Vietnam. Men (n = 12) and women (n = 9) studying at two universities in Hanoi participated in semi-structured interviews that explored perspectives on sexual relationships and sexual coercion among their peers. Thematic analysis synthesized participant narratives into broader themes. Our findings confirmed that, as social norms evolve in Vietnam, young women must navigate shifting, and often contradictory, expectations about sex and dating relationships. Women and men expressed the belief that competing sexual expectations often can limit young women’s sexual agency and contribute to the normalization of sexual coercion in dating relationships. However, some women were embracing greater sexual freedom and reframing norms in ways that reflected their sexual agency. Efforts are needed to address these conflicting expectations, to deepen young men’s understanding of this conflict, and to prevent sexual coercion in young adulthood.
Here I sit, making men in my own image: how learning disorder labels affect teacher student’s expectancies
Authors: Franz David J. , Lenhard Wolfgang , Marx Peter , Richter Tobias
Published: September 2021

Teacher’s evaluation of students is sometimes negatively affected by diagnostic labels. We explored such negative effects caused by the labels “dyscalculia”, “dyslexia”, and “ADHD” in teacher students. In Experiment 1, we varied the presence of the dyscalculia and dyslexia label in vignettes between participants. The dyslexia but not the dyscalculia label had a negative effect on participant’s academic expectations. In our preregistered Experiment 2, the presence of the ADHD label in vignettes was manipulated within participants. To understand the cognitive mechanisms driving label effects, we explored participants’ attributions regarding the students’ problems. Furthermore, a short dissonance-based intervention for counteracting negative label effects was implemented. Unexpectedly, we found both negative and positive label effects. The label led to more positive performance expectations and to more negative ratings of problem stability and problem control. The dissonance-based intervention led to more positive evaluations regardless of whether the ADHD label was mentioned or not. Overall, our findings suggest that learning-disorder labels affect teachers’ expectations in different ways.
Avoiding a “despair death crisis” in Europe: the drivers of human (un)sustainability
Authors: Becchetti Leonardo , Conzo Gianluigi
Published: September 2021

The emergence of the despair death crisis in the US stimulates researchers and policymakers to look at subjective wellbeing data from a different perspective. We wonder what can be done to avoid a similar situation in Europe, and to this purpose we analyse factors correlated with depression in the European Social Survey by considering the latter as a proxy of despair deaths. We find the strongest correlations with poor income, high-income expectations, low education, low-skilled jobs, poor social relationships, failure and shocks in affective relational life. We perform robustness checks finding that our results are robust when using alternative measures of psychological health and when instrumenting married status. If causality links between all these drivers and the dependent variable are verified and confirmed, as for marital status, we can conclude that the despair death crisis depends from a mix of material and immaterial factors (with the latter being dominant) that cannot be fully solved by mere monetary redistribution.
Tools for studying and modulating (cardiac muscle) cell mechanics and mechanosensing across the scales
Authors: Swiatlowska Pamela , Iskratsch Thomas
Published: September 2021

Cardiomyocytes generate force for the contraction of the heart to pump blood into the lungs and body. At the same time, they are exquisitely tuned to the mechanical environment and react to e.g. changes in cell and extracellular matrix stiffness or altered stretching due to reduced ejection fraction in heart disease, by adapting their cytoskeleton, force generation and cell mechanics. Both mechanical sensing and cell mechanical adaptations are multiscale processes. Receptor interactions with the extracellular matrix at the nanoscale will lead to clustering of receptors and modification of the cytoskeleton. This in turn alters mechanosensing, force generation, cell and nuclear stiffness and viscoelasticity at the microscale. Further, this affects cell shape, orientation, maturation and tissue integration at the microscale to macroscale. A variety of tools have been developed and adapted to measure cardiomyocyte receptor-ligand interactions and forces or mechanics at the different ranges, resulting in a wealth of new information about cardiomyocyte mechanobiology. Here, we take stock at the different tools for exploring cardiomyocyte mechanosensing and cell mechanics at the different scales from the nanoscale to microscale and macroscale.
Experimental study on percolation mechanism and displacement characteristics of cold recovery in offshore heavy oil field
Authors: Liu Ying-xian , Tan Jie , Cai Hui , Wang Gong-chang , Mou Song-ru
Published: September 2021

The heavy oil reservoir is a special kind of oil and gas reservoir that differs from the conventional reservoir in many ways. Due to the high viscosity of crude oil, it is not easy to recover. When the viscosity of underground crude oil exceeds 150 cp, the land heavy oil field is generally developed by thermal recovery. S.Z. oilfield is a heavy oil reservoir in the Bohai Sea, with surface crude oil viscosity of 3000–25,000 cp and underground crude oil viscosity of 400–1000 cp. Limited by offshore equipment, the development strategy of land oilfields can't be directly applied. High production capacity is obtained through the cold production development of horizontal branch experimental wells, and the water drive production capacity can reach 40–70 m3/day. At present, there is a lack of research on cold recovery development under the viscosity of crude oil. The existing primary research and common knowledge are challenging to support efficient development technology for effectively producing heavy oil reservoirs. In this paper, through physical simulation experiments, the phase behavior and rheological properties of crude oil in the target block are studied, and the rheological properties of crude oil are clarified. Then, the depletion production and water flooding experiments are carried out, and the displacement characteristics and laws of water flooding cold production are analyzed. Finally, the indoor experiments of water flooding sweep efficiency and oil displacement efficiency in the target block are carried out. Clear its micro and macro spread. It provides technical support for the effective production of offshore heavy oil fields.
Improvement of QDaedalus measurements with continuous detection of environmental parameters
Authors: Völgyesi Lajos , Tóth Gyula
Published: September 2021

QDaedalus is an automated, computer-controlled astro-geodetic measurement system. Astronomical deflections of the vertical measured by the QDaedalus system are significantly influenced by atmospheric refraction. Therefore, the measuring system was further improved by recording the environmental parameters influencing the refraction (air pressure, temperature, humidity) with accurate and high time resolution. In addition to meteorological parameters, refraction also depends on the spectrum of the stars. Both the continuously measured meteorological parameters and the color of the stars were taken into account in the calculation of the refraction. To control the method, we used the deflection of the vertical values of the Pistahegy point in the southern part of Budapest which were determined over 7 years during 260 night measurements. The corrected measurements fit within 0.01" with the average value of previous Pistahegy measurements. The standard deviation of the differences due to the corrections, however, may reach 0.015" for the DOV components.
Differences and similarities between precipitation patterns of different climates
Authors: Ilyés Csaba , Wendo Valerie A. J. A. , Carpio Yetzabel Flores , Szűcs Péter
Published: September 2021

In recent years water-related issues are increasing globally, some researchers even argue that the global hydrological cycle is accelerating, while the number of meteorological extremities is growing. With the help of large number of available measured data, these changes can be examined with advanced mathematical methods. In the outlined research we were able to collect long precipitation datasets from two different climatical regions, one sample area being Ecuador, the other one being Kenya. Using the methodology of spectral analysis based on the discrete Fourier-transformation, several deterministic components were calculated locally in the otherwise stochastic time series, while by the comparison of the results, also with previous calculations from Hungary, several global precipitation cycles were defined in the time interval between 1980 and 2019. The results of these calculations, the described local, regional, and global precipitation cycles can be a helpful tool for groundwater management, as precipitation is the major resource of groundwater recharge, as well as with the help of these deterministic cycles, precipitation forecasts can be delivered for the areas.
Glucose control in home-isolated adults with type 1 diabetes affected by COVID-19 using continuous glucose monitoring
Authors: Longo M. , Scappaticcio L. , Petrizzo M. , Castaldo F. , Sarnataro A. , Forestiere D. , Caiazzo F. , Bellastella G. , Maiorino M. I. , Capuano A. , Esposito K.
Published: September 2021

Purpose

This study is aimed at evaluating changes in metrics of glucose control in home-isolated patients with type 1 diabetes and COVID-19 using a continuous glucose monitoring (CGM) system.

Methods

We included adults aged 18–45 years with type 1 diabetes, using CGM, followed by telemedicine at a Southern Italian University Hospital. Thirty-two home-quarantined subjects with SARS-CoV-2 positive swab constituted the COVID-19 group. Thirty age-matched diabetic individuals without COVID-19 formed the control group. The effects of COVID-19 on glycemic control in patients infected were assessed at different time points [2 weeks before-COVID-19 (Time 1), 2 weeks during-COVID-19 (Time 2) and 2 weeks after COVID-19 (Time 3)] and compared with those without infection.

Results

A significant reduction of TIR (Time 1 vs Time 2, %, 60.1 ± 16.6 vs 55.4 ± 19.2, P = 0.03), associated with a significant increase of TAR level 2 (10.1 ± 7.3 vs 16.7 ± 12.9, P < 0.001), GMI (7.1 ± 0.6 vs 7.5 ± 0.8, P < 0.001), CV (37.3 ± 7.1 vs 39.6 ± 7.0, P = 0.04), mean glucose values (mg/dL, 160.2 ± 26.5 vs 175.5 ± 32.6, P = 0.001) and standard deviation (59.2 ± 13.1 vs 68.6 ± 17.7, P = 0.001) was observed in patients with COVID-19. No significant change of glycemic metrics was found in the NO COVID-19 group across the time.

Conclusion

Young home-isolated patients with type 1 diabetes and COVID-19 showed a worsening of glucose control during COVID-19, as compared with age-matched diabetic subjects without the infection.
Integral representations of rank two false theta functions and their modularity properties
Authors: Bringmann Kathrin , Kaszian Jonas , Milas Antun , Nazaroglu Caner
Published: September 2021

False theta functions form a family of functions with intriguing modular properties and connections to mock modular forms. In this paper, we take the first step towards investigating modular transformations of higher rank false theta functions, following the example of higher depth mock modular forms. In particular, we prove that under quite general conditions, a rank two false theta function is determined in terms of iterated, holomorphic, Eichler-type integrals. This provides a new method for examining their modular properties and we apply it in a variety of situations where rank two false theta functions arise. We first consider generic parafermion characters of vertex algebras of type $$A_2$$

A
2

and $$B_2$$

B
2

. This requires a fairly non-trivial analysis of Fourier coefficients of meromorphic Jacobi forms of negative index, which is of independent interest. Then we discuss modularity of rank two false theta functions coming from superconformal Schur indices. Lastly, we analyze $${\hat{Z}}$$

Z
^

-invariants of Gukov, Pei, Putrov, and Vafa for certain plumbing $$\mathtt{H}$$
H
-graphs. Along the way, our method clarifies previous results on depth two quantum modularity.
An Organic Solvent-Assisted Intercalation and Collection (OAIC) for Ti3C2Tx MXene with Controllable Sizes and Improved Yield
Authors: Qu Danyao , Jian Yingying , Guo Lihao , Su Chen , Tang Ning , Zhang Xingmao , Hu Wenwen , Wang Zheng , Zhao Zhenhuan , Zhong Peng , Li Peipei , Du Tao , Haick Hossam , Wu Weiwei
Published: September 2021

A good method of synthesizing Ti3C2Tx (MXene) is critical for ensuring its success in practical applications, e.g., electromagnetic interference shielding, electrochemical energy storage, catalysis, sensors, and biomedicine. The main concerns focus on the moderation of the approach, yield, and product quality. Herein, a modified approach, organic solvent-assisted intercalation and collection, was developed to prepare Ti3C2Tx flakes. The new approach simultaneously solves all the concerns, featuring a low requirement for facility (centrifugation speed < 4000 rpm in whole process), gram-level preparation with remarkable yield (46.3%), a good electrical conductivity (8672 S cm−1), an outstanding capacitive performance (352 F g−1), and easy control over the dimension of Ti3C2Tx flakes (0.47–4.60 μm2). This approach not only gives a superb example for the synthesis of other MXene materials in laboratory, but sheds new light for the future mass production of Ti3C2Tx MXene.
Envisioning alternative futures of cultural ecosystem services supply in the coastal landscapes of Southwestern Ghana, West Africa
Authors: Kankam Stephen , Inkoom Justice Nana , Koo Hongmi , Fürst Christine
Published: September 2021

Cultural ecosystem services (CES) in Southwestern Ghana evoke a strong sense of attachment of local land users to the landscape. Hence, their supply is necessary for a balanced socio-ecological system. This study explored the potential supply of cultural ecosystem services (science/education, spiritual, tourism, health and recreation benefits) under different land use planning (LUP) scenarios in Southwestern Ghana. Future LUP scenarios were developed and articulated with a diverse group of land-use planning actors (LUPAs) such as regional land use planners, environmental experts, researchers, farmers and landowners. The scenarios covered business-as-usual, mangrove ecosystem restoration, market-driven growth, and the establishment of an “eco-corridor” as green network. A spatially explicit modeling platform, GISCAME, which combines Geographic Information System and Cellular Automaton modules and multicriteria evaluation was used to evaluate the developed scenarios. Outcomes of the study revealed that in the coastal landscape of Southwestern Ghana, values, perceptions and preferences of LUPAs underpin socio-ecological interactions aimed at maintaining and enhancing CES supply. In addition, it indicated that future supply of CES is characterized by an interplay between multiple and diverse perspectives about plausible land-use futures. Perceptions of, and preferences for, CES align with land-use visions related to afforestation, infrastructure development, agriculture expansion and tourism. In the study area and similar contexts where an array and diversity of individual and societal values exist, effective negotiation and facilitation are essential for harnessing and optimizing land-use planning for CES supply.
Sexual Incentive Motivation and Copulatory Behavior in Male Rats Treated with the Adrenergic α2-Adrenoceptor Agonists Tasipimidine and Fadolmidine: Implications for Treatment of Premature Ejaculation
Authors: Lehtimäki Jyrki , Ventura-Aquino Elisa , Chu Xi , Paredes Raúl G. , Ågmo Anders
Published: September 2021

Background

Premature ejaculation is the most common sexual dysfunction in young men, and it often leads to reduced relationship satisfaction and quality of life.

Aim

To determine the role of central and peripheral α2-adrenoceptors in the control of ejaculation and sexual incentive motivation in rats.

Methods

Sexual incentive motivation was studied in a large arena in which a male subject could choose between approaching and remaining close to a sexually receptive female or another male. Sexual behavior was studied in standard observation cages in which a male was allowed to freely interact with a receptive female for 30 minutes. Two highly selective agonists at the α2-adrenoceptors, tasipimidine and fadolmidine, were administered before the tests. Low peripheral doses of fadolmidine have been reported to have effects mainly outside of the central nervous system, whereas at large doses also the central effects are evident.

Outcomes

The time spent close to the receptive female in relation to the time spent with the male and measures of ambulatory activity were obtained from the test for sexual incentive motivation, while the habitual parameters of sexual behavior were recorded with the copulation test.

RESULTS

Tasipimidine prolonged ejaculation latency and the interintromission interval at the dose of 200 µg/kg when data from fast-ejaculating rats were used. No other sexual parameter was modified. A dose of 100 µg/kg was ineffective. There was no consistent effect on sexual incentive motivation, although modest sedation was observed. Fadolmidine, a drug that does not easily penetrate the blood–brain barrier, had no effect on sexual incentive motivation at any of the doses used (3, 30, and 100 µg/kg). The largest dose had clear sedative effects. The lower doses had no systematic effect on sexual behavior, not even when only fast or very fast ejaculating males were analyzed.

Clinical Translation

The findings are relevant to the search for treatments for premature ejaculation that are specific enough to selectively delay ejaculation.

Strengths & Limitations

The procedures used here are standard in the field and yield the most reliable data. Whether the effects observed in male rats are directly transferrable to men can only be determined through clinical studies.

CONCLUSION

The observation that drugs acting at central but not peripheral α2-adrenoceptors prolong ejaculation latency without affecting any other parameter of sexual behavior or sexual incentive motivation suggests that this kind of drug may be suitable for treating premature ejaculation.
Marginal Citizens: Interracial intimacies and the incarceration of Japanese Canadians, 1942–1949
Authors: Vallianatos Mary Anne
Published: September 2021

Following Japan’s 1941 attacks on Hawai’i and Hong Kong, Canada relocated, detained, and exiled citizens and residents of Japanese ancestry. Many interracial families, however, were exempted from this racial project called the internment. The form of the exemption was an administrative permit granted to its holder on the basis of their marital or patrilineal proximity to whiteness. This article analyzes these permits relying on archival research and applying a critical race feminist lens to explore how law was constitutive of race at this moment in Canadian history. I argue that the permits recategorized interracial intimacies towards two racial ends: to differentiate the citizen from the “enemy alien”; and to regulate the interracial family according to patriarchal common law principles. This article nuances received narratives of law as an instrument of racial exclusion by documenting the way in which a new inclusive state measure sustained old exclusions.
Model order reduction based on Runge–Kutta neural networks
Authors: Zhuang Qinyu , Lorenzi Juan Manuel , Bungartz Hans-Joachim , Hartmann Dirk
Published: September 2021

Model order reduction (MOR) methods enable the generation of real-time-capable digital twins, with the potential to unlock various novel value streams in industry. While traditional projection-based methods are robust and accurate for linear problems, incorporating machine learning to deal with nonlinearity becomes a new choice for reducing complex problems. These kinds of methods are independent to the numerical solver for the full order model and keep the nonintrusiveness of the whole workflow. Such methods usually consist of two steps. The first step is the dimension reduction by a projection-based method, and the second is the model reconstruction by a neural network (NN). In this work, we apply some modifications for both steps respectively and investigate how they are impacted by testing with three different simulation models. In all cases Proper orthogonal decomposition is used for dimension reduction. For this step, the effects of generating the snapshot database with constant input parameters is compared with time-dependent input parameters. For the model reconstruction step, three types of NN architectures are compared: multilayer perceptron (MLP), explicit Euler NN (EENN), and Runge–Kutta NN (RKNN). The MLPs learn the system state directly, whereas EENNs and RKNNs learn the derivative of system state and predict the new state as a numerical integrator. In the tests, RKNNs show their advantage as the network architecture informed by higher-order numerical strategy.
Modelling the transition from grain-boundary sliding to power-law creep in dry snow densification
Authors: Morris Elizabeth M. , Montgomery Lynn N. , Mulvaney Robert
Published: September 2021

This paper presents a physics-based macroscale model for the densification of dry snow which provides for a smooth transition between densification by grain-boundary sliding (stage 1) and densification by power-law creep (stage 2). The model uses established values of the stage 1 and 2 densification rates away from the transition zone and two transition parameters with a simple physical basis: the transition density and the half-width of the transition zone. It has been calibrated using density profiles from the SUMup database and physically based expressions for the transition parameters have been derived. The transition model produces better predictions of the depth of the nominal bubble close-off horizon than the Herron and Langway model, both in its classical form and in a recent version with re-optimised densification rates.
TRANSLATING THE POET: ALEXANDER POPE'S ENGAGEMENT WITH THE HOMERIC BIOGRAPHICAL TRADITION IN HIS TRANSLATIONS OF THE ILIAD AND THE ODYSSEY
Authors: Bassino Paola
Published: September 2021

This article explores Alexander Pope's experience as a translator of the Iliad and the Odyssey, particularly his engagement with Homer as a poet and his biographical tradition. The study focuses on how Homer features in Pope's correspondence as he worked on the translations, how the Greek poet is described in the prefatory essay by Thomas Parnell and Pope's own notes to the text, and finally how his physical presence materializes in the illustrations within Pope's translations. The article suggests that, by engaging with the biography of Homer, Pope explores issues such as poetic authority and divine inspiration, promotes his own translations against European competitors, and ultimately establishes himself as a translator and as a poet. Throughout the process, Homer appears as a presence that forces Pope constantly to challenge himself, until he feels he can stand a comparison with the greatest poet ever.
Greek Literature
Authors: Heath Malcolm
Published: September 2021

When I reviewed Daniel Harris-McCoy's text, translation and commentary on Artemidorus’ Oneirocritica (G&R 60 [2013], 318–19), I never dreamed that eight years later I would be reviewing two more books on Artemidorus – or, rather, a co-ordinated pair of them. It would be an uncharitable joke to describe Harris-McCoy's translation as a nightmare: even so, I was not alone among reviewers in judging it unidiomatic and often defective. Martin Hammond's characteristically fluent, lucid, and (importantly) accurate translation is supplied with notes on the Greek text and an outstandingly useful sixty-two-page index; Peter Thonemann contributes an informative introduction and explanatory notes on the content.
Greek History
Authors: Vlassopoulos Kostas
Published: September 2021

I commence this review with a major contribution to the social history of classical Athens. Athenian social history is traditionally focused on polarities of class, status, and gender; while these polarities were obviously important, it is equally significant to adopt an interactionist approach and explore the shape of encounters between people belonging to the same or different groups. Rafał Matuszewski has chosen to focus on the interactions and communication between male Athenian citizens: in particular, the various spaces in which those interactions took place, as well as the means of communication. As regards the spaces, he explores in detail the noisy streets, the Agora, the various shops, workshops, and places of commensality and entertainment, the baths, the gymnasia, and the palaestrae. This is an excellent synthesis of a large number of social spaces in classical Athens, which have never been explored in the same detail as, for example, sanctuaries and cemeteries. Equally fascinating is the second part of the work and its detailed exploration of the body as a means of communication, alongside elements of material culture like clothes, houses, and graves. The wealth of material that is collected and examined and the interactionist framework employed have the potential to revolutionize how we study Greek social and cultural history; it is to be hoped that Anglophone readers will make the effort to engage seriously with this important German book.
Philosophy
Authors: Bryan Jenny
Published: September 2021

David Conan Wolfsdorf has done a great service in putting together the thirty chapters (only a handful by women) that make up the new collection Early Greek Ethics. As he notes, ethical thinking prior to Socrates has generally been neglected or, in some cases, simply denied. Wolfsdorf's classification of ‘early’ as the ‘formative period’ (late sixth to early fourth centuries bce) prior to Plato's and Aristotle's major ethical works allows him to bring together a rich and diverse group of individuals and topics. He himself acknowledges that different people will feel different kinds of lack within the collection, but he is explicit that its aim is to be ‘quite’, rather than entirely, comprehensive. He is also clear that his aim is to focus on Greek ‘philosophical ethics’ (as he understands it) rather than the sort of significant ethical thinking we might think can be found in Greek tragedy, for example.
General
Authors: Petrovic Ivana
Published: September 2021

One of my favourite undergraduate classes to teach is Greek mythology. At American universities, Greek myth is a popular choice for satisfying humanities credit requirements, and professors are faced with a double dilemma. On the one hand, students have very different levels of knowledge, ranging from, say, a science major with virtually no idea about the ancient world to a know-it-all myth-whiz Classics major at the other end of the scale. The second problem is the choice and organization of material. Tough decisions have to be made, especially if a professor insists on students reading ancient Greek and Latin texts in translation, instead of relying on a modern retelling of myth. Which tragedies to choose? Which sections of Ovid's Metamorphoses? The whole of Homer or just select books? The challenges are real, but the rewards are great. After the initial struggle with Hesiod's Theogony (despite collective grumbling, Hesiod is non-negotiable for me), witnessing the magic of Greek myth at work never ceases to amaze me. In a blink of an eye, the class is passionately defending or attacking Phaedra, or debating fate and the gods; and, of course, everyone is united in hating Jason. It was my early fascination with Greek myth that attracted me to study Classics (the main culprit was the generously illustrated Serbian translation of Gustav Schwab's Gods and Heroes of Ancient Greece) and the crushing sense of responsibility for sparking that first interest in my students is only matched by joy upon seeing it work. I take mythology books very seriously because they are often the gateway to the Classics. Several books on myth landed on my desk this year and I'll start with three general introductions. None of these could serve as introductions to myth for children or young adults, but each could be an excellent first step for those wishing to know more about various scholarly approaches to Greek myths and cults.
Preface to the MSCS Issue 31.1 (2021) Homotopy Type Theory and Univalent Foundations
Authors: Ahrens Benedikt , Huber Simon , Mörtberg Anders
Published: September 2021

This issue of Mathematical Structures in Computer Science is Part I of a Special Issue dedicated to the emerging field of Homotopy Type Theory and Univalent Foundations.
Verification of an Intelligent Ray Launching Algorithm in Indoor Environments in the Ka‐Band
Authors: Yang Wenfei , Huang Jie , Zhang Jiliang , Gao Yuan , Salous Sana , Zhang Jie
Published: September 2021

This paper presents the verification of indoor propagation channel simulations based on an intelligent ray launching algorithm (IRLA) in the Ka‐band of the millimeter‐wave (mmWave) spectrum in various indoor environments, including a classroom, an office, and a corridor, by radio channel measurements. Power delay profiles (PDPs), path loss, and root‐mean‐square (RMS) delay spreads were obtained from both the simulation results and the measurement results. Moreover, parameters of two site‐general path loss models, the close‐in free space reference distance path loss model and the floating‐intercept path loss model, were estimated based on the measured and simulated path loss. The comparison between the simulation results and the measurement results indicates that the IRLA‐based simulation can accurately describe the main characteristics of the indoor propagation channel in the Ka‐band.
Multiscale Hydraulic Conductivity Characterization in a Fractured Granitic Aquifer: The Evaluation of Scale Effect
Authors: Ren Shuangpo , Zhang Ye , Jim Yeh Tian‐Chyi , Wang Yuli , Carr Bradley J.
Published: September 2021

We characterized horizontal hydraulic conductivity (K) of a fractured granitic aquifer using single‐ and cross‐hole hydraulic tests to evaluate “scale effect.” For selected boreholes, K estimates were obtained using single‐hole FLUTe liner and slug tests. Several cross‐hole pumping tests were carried out at various durations. Drawdown responses were first interpreted using analytical well‐test solutions to obtain an effective horizontal conductivity (Keff) assuming a homogeneous and infinite aquifer. The same drawdowns were then numerically inverted using transient hydraulic tomography (THT) to delineate spatial distributions of K and storativity in the area encompassing the boreholes. Papadopulos (1965) and a nonlinear least squares minimization method produced a similar principal Keff direction that is consistent with the dominant fracture strike observed from outcrop and borehole televiewer data. However, principal direction and magnitude of this Keff depend on the pumping test duration and the number of monitoring boreholes used in the interpretation. As a group, K obtained from cross‐hole tests is larger than that obtained from single‐hole tests. However, because cross‐hole tests stressed the aquifer at both interwell and larger scales, Keff obtained from interpreting cross‐hole data is observed to decrease with pumping time, likely due to the dominance of less permeable fractures at larger scale. This lateral reduction of mean K is also revealed by THT as low K zones surrounding the test boreholes. Overall, K is found to increase from single‐hole to the interwell scale and then decrease at larger scale, exhibiting a non‐monotonic scale effect.
Consequences of Dryland Maize Planting Decisions Under Increased Seasonal Rainfall Variability
Authors: Krell N. T. , Morgan B. E. , Gower D. , Caylor K. K.
Published: September 2021

Shifts in rainfall frequency and intensity can lead to heavy crop loss in rainfed agricultural systems. Small‐scale farmers who plant with limited resources need to carefully select management strategies that are well suited for their environment. Farmers must choose between planting higher‐yielding varieties that take longer to mature and lower‐yielding varieties that can be harvested sooner. To better understand the interactions between rainfall variability, cultivar choice, and cropping success, we implement an ecohydrological model that accounts for variation in daily soil moisture and converts water stress to crop yield. We apply the model to growing conditions of dryland farmers in central Kenya, which is a drought‐prone and semiarid region with spatially heterogeneous rainfall. To simulate stochastic daily rainfall, we derive parameters in 10‐day increments from a 30+ year daily rainfall data set. We use these properties to model the stochastic seasonal water availability for cultivars with different maturation lengths. In agreement with past studies, our analysis shows that storms are becoming more intense and less frequent. We show that maize crops are prone to water deficit in the part of the growing season when crop water requirements are highest. Despite the potential for higher‐yielding, late maturing varieties to improve total harvest, we find that early maturing varieties that are drought‐avoidant have the lowest likelihood of failure. In light of reduced rainfall totals, we show that the historical probability of crop failure was lowest in the past and is now increasing.
Magnetostratigraphy of the Triassic Moenkopi Formation From the Continuous Cores Recovered in Colorado Plateau Coring Project Phase 1 (CPCP‐1), Petrified Forest National Park, Arizona, USA: Correlation of the Early to Middle Triassic Strata and Biota in Colorado Plateau and Its Environs
Authors: Haque Ziaul , Geissman John W. , Irmis Randall B. , Olsen Paul E. , Lepre Christopher , Buhedma Hesham , Mundil Roland , Parker William G. , Rasmussen Cornelia , Gehrels George E.
Published: September 2021

The Colorado Plateau Coring Project Phase 1 (CPCP‐1) acquired three continuous drill cores from Petrified Forest National Park (PFNP), Arizona, U.S.A., two of which (CPCP‐PFNP13‐1A and CPCP‐PFNP13‐2B) intersected the Upper Triassic Chinle Formation, Lower(?)‐Middle Triassic Moenkopi Formation (MF) and Permian Coconino Sandstone. We examined both cores to construct a high‐resolution magnetostratigraphy of MF strata, and progressive demagnetization data yield well‐defined, interpretable paleomagnetic results. Each lithostratigraphic member of the MF (Wupatki, Moqui, and Holbrook members) contains authigenic and detrital hematite as the dominant magnetic carrier with distinguishing rock magnetic characteristics. Magnetostratigraphy of MF strata in both CPCP‐1 cores consists of six normal and six reverse polarity magnetozones, from the youngest to the oldest, MF1n to MF6r. Recent single‐crystal chemical abrasion–thermal ionization mass spectrometry (CA‐TIMS) U‐Pb data from a sample in magnetozone MF1n yield a latest Anisian/earliest Ladinian (241.38 ± 0.43 Ma) age. Correlation of the CA‐TIMS‐calibrated magnetostratigraphy with the astronomically tuned polarity timescale for the Middle Triassic deep‐marine Guandao (GD) section of South China ties the magnetozone MF1n with GD8 and MF6r with GD2r, and implies that the MF spans, at most, the earliest Anisian (Aegean) to latest Anisian (Illyrian)/earliest Ladinian stages (ca. 246.8 to 241.5 Ma). This age estimate for the MF suggests that the timespan of the regional, pre‐Norian disconformity is about 17 Ma, which demonstrates that MF vertebrate fossil assemblages in east‐central Arizona are millions of years (minimally 3–4 Ma) younger than previously suggested and are all Anisian in age, with no indications of substantial hiatuses in the MF section.
Kinematics of Crystal Growth in Single‐Seal Syntaxial Veins in Limestone ‐ A Phase‐Field Study
Authors: Späth Michael , Spruženiece Liene , Urai Janos L. , Selzer Michael , Arndt Max , Nestler Britta
Published: September 2021

Building on recent developments in phase‐field modeling of structural diagenesis, we present an analysis of single‐seal syntaxial calcite vein microstructure in a variety of limestones. We focus on the effects of fracture aperture, intergranular versus transgranular fracturing, crystal habit and the presence of second phases in the host rock, to systematically investigate a simplified set of models covering the main classes of limestone in 2D. We incorporate the kinematic process of growth competition between differently oriented crystals, growth rate anisotropy between rough and faceted crystal surfaces and different growth rates on intergranular to transgranular fractures. Results show that within the considered parameter space we can reproduce a wide range of vein microstructures in limestone known in nature, such as stretched crystals, wide‐blocky veins, and elongated crystals. We identify five archetypes of vein microstructures in limestones, which are diagnostic for different kinematics and evolution of transport processes and illustrate the effect of key parameters in microstructure maps. We show how syntaxial veins with median line form after intergranular fracturing, while stretched crystals indicate transgranular fracturing. Intergranular fracturing leads to stronger growth competition and more prominent CPO in syntaxial veins. Our results can be extended to 3D to include multiple crack‐seal events, pore‐space cementation and simulation of fluid flow, providing a generic platform for modeling structural diagenesis in limestones.
Influence of Land Reclamation on Fresh Groundwater Lenses in Oceanic Islands: Laboratory and Numerical Validation
Authors: Sheng Chong , Jiao Jiu Jimmy , Xu Hehua , Liu Yi , Luo Xin
Published: September 2021

Fresh groundwater lenses in tropic oceanic islands are important freshwater resources for local inhabitants and ecosystems. These reef‐carbonate islands typically have a dual‐aquifer structure, with poorly consolidated Holocene sediments deposited unconformably on Pleistocene limestone reef deposits. Land reclamation has been carried out on the reef flats or shallow water areas in coral islands, a very common practice in the Indian Ocean and the South China Sea. However, there is a lack of comprehensive understanding of how the groundwater system will respond to land reclamation. In this study, the impact of land reclamation on the fresh groundwater lens in an island is investigated using multiple methods: sand‐tank experiments, sharp‐interface analytical solutions, and numerical modeling. This study demonstrates that land reclamation can increase the freshwater storage of the lens and shift the water divide toward the reclamation area. Furthermore, a lower permeability fill material especially with a greater scale or thickness leads to higher freshwater storage. However, the expansion of the lens will be truncated due to the high‐permeability of the lower layer. These observations and findings from the laboratory experiments and two‐dimensional numerical simulations are further ground‐truthed by the three‐dimensional modeling of Yongxing Island in the South China Sea. The findings of this study provide a comprehensive understanding of the impact of land reclamation on island groundwater system and the theoretical supports for Small Island Developing States to use the reclamation not only for urban development but also for extra aquifer to enhance the water resource sustainability under the climate change.
Infralimbic BDNF signaling is necessary for the beneficial effects of extinction on set shifting in stressed rats
Authors: Paredes Denisse , Knippenberg Anna R. , Morilak David A.
Published: September 2021

Current pharmacotherapies for posttraumatic stress disorder (PTSD) and major depressive disorder (MDD) are ineffective for many patients, and often do not restore cognitive dysfunction associated with these disorders. Behavioral therapies, such as exposure therapy, can be effective for treatment-resistant patients. The mechanisms underlying exposure therapy are not well-understood. Fear extinction as an intervention after chronic stress can model the beneficial effects of exposure therapy in rats. Extinction requires neuronal activity and protein synthesis in the infralimbic (IL) cortex for its beneficial effects. We hypothesized that extinction requires Brain-Derived Neurotrophic Factor (BDNF) activity in the IL cortex to reverse stress-induced cognitive flexibility impairments. Extinction learning reversed set-shifting deficits induced by Chronic Unpredictable Stress (CUS), tested 24 h after extinction. Blocking BDNF signaling in the IL cortex during extinction by local administration of a neutralizing antibody prevented the beneficial effects of extinction on set shifting after stress. Extinction induced activation of the BDNF TrkB receptor, and signaling pathways associated with BDNF (Akt and Erk). Administration of exogenous BDNF into IL cortex in the absence of extinction was sufficient to reverse the effects of stress on set shifting. The effects of extinction were prevented by blocking either Erk or Akt signaling in the IL cortex, whereas the effects of exogenous BDNF were dependent on Erk, but not Akt, signaling. Our observations suggest that BDNF-Erk signaling induced by extinction underlies plastic changes that can reverse or counteract the effects of chronic stress in the IL cortex.