bluuebunny/crossref_metadata_2025 huggingface dataset:
A Historical View of Studies of Women’s Work
Authors: Balka Ellen , Wagner Ina
Published: November 2020

This paper places observational studies of women’s work in historical perspective. We present some of the very early studies (carried out in the period from 1900 to 1930), as well as several examples of fieldwork-based studies of women’s work, undertaken from different perspectives and in varied locations between the 1960s and the mid 1990s. We outline and discuss several areas of thought which have influenced studies of women’s work - the automation debate; the focus on the skills women need in their work; labour market segregation; women’s health; and technology and the redesign of work – and the research methods they used. Our main motivation in this paper is threefold: to demonstrate how fieldwork based studies which have focussed on women’s work have attempted to locate women’s work in a larger context that addresses its visibility and value; to provide a thematic historiography of studies of women’s work, thereby also demonstrating the value of an historical perspective, and a means through which to link it to contemporary themes; and to increase awareness of varied methodological perspectives on how to study work.
Impaired chloroplast positioning affects photosynthetic capacity and regulation of the central carbohydrate metabolism during cold acclimation
Authors: Kitashova Anastasia , Schneider Katja , Fürtauer Lisa , Schröder Laura , Scheibenbogen Tim , Fürtauer Siegfried , Nägele Thomas
Published: November 2020

Photosynthesis and carbohydrate metabolism of higher plants need to be tightly regulated to prevent tissue damage during environmental changes. The intracellular position of chloroplasts changes due to a changing light regime. Chloroplast avoidance and accumulation response under high and low light, respectively, are well known phenomena, and deficiency of chloroplast movement has been shown to result in photodamage and reduced biomass accumulation. Yet, effects of chloroplast positioning on underlying metabolic regulation are less well understood. Here, we analysed photosynthesis together with metabolites and enzyme activities of the central carbohydrate metabolism during cold acclimation of the chloroplast unusual positioning 1 (chup1) mutant of Arabidopsis thaliana. We compared cold acclimation under ambient and low light and found that maximum quantum yield of PSII was significantly lower in chup1 than in Col-0 under both conditions. Our findings indicated that net CO2 assimilation in chup1 is rather limited by biochemistry than by photochemistry. Further, cold-induced dynamics of sucrose phosphate synthase differed significantly between both genotypes. Together with a reduced rate of sucrose cycling derived from kinetic model simulations our study provides evidence for a central role of chloroplast positioning for photosynthetic and metabolic acclimation to low temperature.
Using Longitudinal Social Network Analysis to Evaluate a Community-Wide Parenting Intervention
Authors: Kleyn Lisa M. , Hewstone Miles , Ward Catherine L. , Wölfer Ralf
Published: November 2020

Harsh parenting attitudes and behaviors negatively impact children’s behavior and development, and are linked to heightened levels of violence in children. Parent training programs are effective preventive interventions, but only reach caregivers who attend them. In this study, programs were implemented alongside a community mobilization process, intended to use caregivers’ social networks to disseminate new parenting skills community wide. We used social network analysis to explore whether this intervention, first, increased positive parenting, second, changed social networks of female caregivers (selection), and, third, influenced parenting behavior via connections (socialization), while controlling for psychiatric morbidity, parenting stress, alcohol misuse, and child’s age. “Colored” Afrikaans-speaking female caregivers (N = 235; mean age 35.92 years) in a rural community in South Africa, with children between 1½ and 18 years old, were included in the study; two waves of data were collected (January–April 2016 and June–October 2017). We detected community-wide increases in positive parenting behavior (involvement, supervision, consistent discipline, and reduced corporal punishment). Attending at least one session of a parenting skills training program (n = 51; 21.7%) significantly predicted increases in network centrality (i.e., outdegree and indegree). Caregivers appeared to use similar parenting behavior to other caregivers they were connected to within the network, especially when those others attended a parenting skills training program. Overall, the results suggest that the information in the intervention was spread throughout the community through social interactions with program attendees and the community mobilization process. The results also illustrate the value of social network analysis for ascertaining the processes by which the intervention achieved its impact.
Brine Formation and Mobilization in Submarine Hydrothermal Systems: Insights from a Novel Multiphase Hydrothermal Flow Model in the System H2O–NaCl
Authors: Vehling F. , Hasenclever J. , Rüpke L.
Published: November 2020

Numerical models have become indispensable tools for investigating submarine hydrothermal systems and for relating seafloor observations to physicochemical processes at depth. Particularly useful are multiphase models that account for phase separation phenomena, so that model predictions can be compared to observed variations in vent fluid salinity. Yet, the numerics of multiphase flow remain a challenge. Here we present a novel hydrothermal flow model for the system H2O–NaCl able to resolve multiphase flow over the full range of pressure, temperature, and salinity variations that are relevant to submarine hydrothermal systems. The method is based on a 2-D finite volume scheme that uses a Newton–Raphson algorithm to couple the governing conservation equations and to treat the non-linearity of the fluid properties. The method uses pressure, specific fluid enthalpy, and bulk fluid salt content as primary variables, is not bounded to the Courant time step size, and allows for a direct control of how accurately mass and energy conservation is ensured. In a first application of this new model, we investigate brine formation and mobilization in hydrothermal systems driven by a transient basal temperature boundary condition—analogue to seawater circulation systems found at mid-ocean ridges. We find that basal heating results in the rapid formation of a stable brine layer that thermally insulates the driving heat source. While this brine layer is stable under steady-state conditions, it can be mobilized as a consequence of variations in heat input leading to brine entrainment and the venting of highly saline fluids.
Relationships of sleep disturbance, intestinal microbiota, and postoperative pain in breast cancer patients: a prospective observational study
Authors: Yao Zhi-Wen , Zhao Bing-Cheng , Yang Xiao , Lei Shao-Hui , Jiang Yu-Mei , Liu Ke-Xuan
Published: November 2020

Purpose

Our study was designed to examine the possible relationship between gut microbiota, sleep disturbances, and acute postoperative pain.

Methods

Using 16S rRNA sequencing, we analyzed preoperative fecal samples from women undergoing breast cancer surgery. Preoperative sleep disturbance was evaluated with the Pittsburgh Sleep Quality Index (PSQI) questionnaire. Peak and average pain at rest and movement were evaluated 24 h after surgery, using a numerical rating scale (NRS). Preoperative symptoms of depression and anxiety were assessed with the Patient Health Questionnaire-9 (PHQ-9) and Generalized Anxiety Disorder-7 (GAD-7), respectively. Inflammation was measured using white blood cell and neutrophil counts, together with platelet-lymphocyte ratio, and neutrophil-lymphocyte ratio.

Results

Preoperative sleep disturbance was associated with more severe acute postoperative pain. At the phylum level, women with poor sleep quality had higher relative abundance of Firmicutes (p = 0.021) and lower relative abundance of Bacteroidetes (p = 0.013). At the genus level, women with poor sleep quality harbored higher relative abundance of Acidaminococcus and lower relative abundance of several genera. The genus Alloprevotella was negatively associated with peak pain at movement during the first 24 h (r = − 0.592, p < 0.001). The genus Desulfovibrio was negatively associated with symptoms of anxiety (r = − 0.448, p = 0.006). However, partial correlations suggested that the relationship between Alloprevotella and peak pain at movement during the first 24 h was not statistically significant after controlling for sleep (r = − 0.134, p = 0.443).

Conclusion

These findings suggest that the changed gut microbiota may be involved in sleep-pain interaction and could be applied as a potential preventive method for postoperative pain.

Trial registration

The present clinical study has been registered on Chinese Clinical Trial Registry (www.chictr.org.cn); the clinical trial registration number is ChiCTR1900021730; the date of registration is March 7, 2019.
Machine learning for human learners: opportunities, issues, tensions and threats
Authors: Webb Mary E. , Fluck Andrew , Magenheim Johannes , Malyn-Smith Joyce , Waters Juliet , Deschênes Michelle , Zagami Jason
Published: November 2020

Machine learning systems are infiltrating our lives and are beginning to become important in our education systems. This article, developed from a synthesis and analysis of previous research, examines the implications of recent developments in machine learning for human learners and learning. In this article we first compare deep learning in computers and humans to examine their similarities and differences. Deep learning is identified as a sub-set of machine learning, which is itself a component of artificial intelligence. Deep learning often depends on backwards propagation in weighted neural networks, so is non-deterministic—the system adapts and changes through practical experience or training. This adaptive behaviour predicates the need for explainability and accountability in such systems. Accountability is the reverse of explainability. Explainability flows through the system from inputs to output (decision) whereas accountability flows backwards, from a decision to the person taking responsibility for it. Both explainability and accountability should be incorporated in machine learning system design from the outset to meet social, ethical and legislative requirements. For students to be able to understand the nature of the systems that may be supporting their own learning as well as to act as responsible citizens in contemplating the ethical issues that machine learning raises, they need to understand key aspects of machine learning systems and have opportunities to adapt and create such systems. Therefore, some changes are needed to school curricula. The article concludes with recommendations about machine learning for teachers, students, policymakers, developers and researchers.
Human Induced Pluripotent Stem Cells as a Disease Model System for Heart Failure
Authors: Deicher Anton , Seeger Timon
Published: November 2020

Purpose of Review

Heart failure is among the most prevalent disease complexes overall and is associated with high morbidity and mortality. The underlying aetiology is manifold including coronary artery disease, genetic alterations and mutations, viral infections, adverse immune responses, and cardiac toxicity. To date, no specific therapies have been developed despite notable efforts. This can especially be attributed to hurdles in translational research, mainly due to the lack of proficient models of heart failure limited translation of therapeutic approaches from bench to bedside.

Recent Findings

Human induced pluripotent stem cells (hiPSCs) are rising in popularity, granting the ability to divide infinitely, to hold human, patient-specific genome, and to differentiate into any human cell, including cardiomyocytes (hiPSC-CMs). This brings magnificent promise to cardiological research, providing the possibility to recapitulate cardiac diseases in a dish. Advances in yield, maturity, and in vivo resemblance due to straightforward, low-cost protocols, high-throughput approaches, and complex 3D cultures have made this tool widely applicable. In recent years, hiPSC-CMs have been used to model a wide variety of cardiac diseases, bringing along the possibility to not only elucidate molecular mechanisms but also to test novel therapeutic approaches in the dish.

Within the last decade, hiPSC-CMs have been exponentially employed to model heart failure. Constant advancements are aiming at improvements of differentiation protocols, hiPSC-CM maturity, and assays to elucidate molecular mechanisms and cellular functions. However, hiPSC-CMs are remaining relatively immature, and in vitro models can only partially recapitulate the complex interactions in vivo. Nevertheless, hiPSC-CMs have evolved as an essential model system in cardiovascular research.
The Geometry of Marked Contact Engel Structures
Authors: Manno Gianni , Nurowski Paweł , Sagerschnig Katja
Published: November 2020

A contact twisted cubic structure$$({\mathcal M},\mathcal {C},{\varvec{\upgamma }})$$

(
M
,
C
,

γ

)

is a 5-dimensional manifold $${\mathcal M}$$
M
together with a contact distribution $$\mathcal {C}$$
C
and a bundle of twisted cubics $${\varvec{\upgamma }}\subset \mathbb {P}(\mathcal {C})$$

γ

⊂
P
(
C
)

compatible with the conformal symplectic form on $$\mathcal {C}$$
C
. The simplest contact twisted cubic structure is referred to as the contact Engel structure; its symmetry group is the exceptional group $$\mathrm {G}_2$$

G
2

. In the present paper we equip the contact Engel structure with a smooth section $$\sigma : {\mathcal M}\rightarrow {\varvec{\upgamma }}$$

σ
:
M
→

γ

, which “marks” a point in each fibre $${\varvec{\upgamma }}_x$$

γ

x

. We study the local geometry of the resulting structures $$({\mathcal M},\mathcal {C},{\varvec{\upgamma }}, \sigma )$$

(
M
,
C
,

γ

,
σ
)

, which we call marked contact Engel structures. Equivalently, our study can be viewed as a study of foliations of $${\mathcal M}$$
M
by curves whose tangent directions are everywhere contained in $${\varvec{\upgamma }}$$

γ

. We provide a complete set of local invariants of marked contact Engel structures, we classify all homogeneous models with symmetry groups of dimension $$\ge 6$$

≥
6

up to local equivalence, and we prove an analogue of the classical Kerr theorem from Relativity.
Conscientious internationalisation in higher education: contextual complexities and comparative tensions
Authors: Ledger Susan , Kawalilak Colleen
Published: November 2020

In this paper, authors focus on how internationalisation is defined, interpreted, and responded to by Universities in Australia and Canada, two decades after de Wit’s (Strategies for the internationalisation of higher education. A comparative study of Australia, Canada, Europe and the USA. European Association for International Education, Amsterdam, 1995) comparison of internationalisation in four higher education contexts. Guided by humanitarian factors that impact internationalisation in higher education contexts, authors find convergence and divergence with de Wits earlier study. A critical policy lens is employed to further analyse, probe and pose critical questions related to people, philosophy, place, processes, and power (5Ps). Authors argue that the intent (philosophy) of institutions (place) to internationalise (process) are impacted by the interests (power) of individuals and institutions (people) and these often conflict with descriptions and ideals of internationalisation. The authors offer conscientious internationalisation (CI) to recalibrate discourse and practices embedded in the internationalisation of higher education. CI prioritises ethics over markets. It is characterized as practices and processes informed by constitutive principles and ethical practices that amplify equity, reciprocity, and integrity.
The Measurement of the Silicon Lattice Parameter and the Count of Atoms to Realise the Kilogram
Authors: Massa Enrico , Sasso Carlo Paolo , Mana Giovanni
Published: November 2020

X-ray interferometry established a link between atomic and macroscopic realisations of the metre. The possibility of measuring the silicon lattice parameter in terms of optical wavelengths opened the way to count atoms, to determine the Avogadro constant with unprecedented accuracy, and, nowadays, to realise the kilogram from the Planck constant.
Also, it is a powerful tool in phase-contrast imaging by X-rays and, combined with optical interferometry, in linear and angular metrology with capabilities at the atomic scale. This review tells the history of the development of this fascinating technology at the Istituto Nazionale di Ricerca Metrologica in the last forty years. Eventually, it highlights its contribution to the redefinition of the International System of Units (SI).
Survival and growth of Vibrio cholerae and Escherichia coli in treated groundwater consumed in northern Cameroon
Authors: Djaouda Moussa , Wadoubé Zoua , Baponwa Odile , Youssoufa Soumayyata , Gaké Bouba , Liang Song , Nola Moïse
Published: November 2020

Treated groundwater is a major source of drinking water but subject to potential contamination of fecal–oral pathogens. To understand ecology of the pathogens in the treated water, this study evaluated survival and growth of Vibrio cholerae and Escherichia coli in the treated groundwater in northern Cameroon. E. coli and V. cholerae O1 were isolated from human feces. Water samples were collected from the following sources: a well, tap water from the Cameroon Water Utilities Company, and mineral and borehole waters sold in Maroua, respectively. These waters were treated by one or more processes, including autoclaving, filtration, chlorination and ozonation and were used for the constitution of microcosms. E. coli and V. cholerae were inoculated into each microcosm at respective concentrations of 50 CFU/10 mL (separately) and 40 CFU/10 mL each (together). All bacterial strains survived in all microcosms were used. The ability to survive and grow varied with the bacterial strain and microcosm (P < 0.05). When inoculated separately into the same type of microcosms, V. cholerae grew faster than E. coli with the latter even showing decrease in concentration in mineral water. When inoculated together, V. cholerae grew faster than E. coli, except in autoclaved well water and filtered and autoclaved well water. Autochthonous ultramicroflora inhibited the growth of E. coli in filtered well water (P < 0.05).
Comparative assessment of Mucuna solannie as an alternative fluid loss control material in synthetic drilling fluid design
Authors: Igwilo Kevin C. , Uwaezuoke N. , Onyekwere Raymond K. , Amaefule Vivian C. , Durogbitan Abimbola A. , Ikoro Victor G.
Published: November 2020

In recent years, research using biomaterials in drilling fluid design has thrown light on their biodegradability, availability and low cost. Apart from these, they have in some cases shown properties superior to those of synthetic materials. This research assessed Mucuna solannie as a fluid loss control agent, looking at its fluid loss, filter cake quality, rheology and comparing them with those of Sodium Asphalt Sulfonate, a commonly used drilling mud additive. It assessed the additives at varying concentrations of 2 ppb, 4 ppb, 6 ppb and 8 ppb. The results obtained were filtrate volumes of 5.5 against 4.8 at 2 ppb, 5.0 against 4.5 at 4 ppb, 4.5 against 4.2 at 6 ppb, and 4.1 against 3.8 at 8 ppb, all at 30 min. Field standard value is 5.0 ml fluid loss. Filter cake thickness was1mm for all concentrations of Mucuna solannie. On rheology, plastic viscosity, yield point and yield stress were 27cP against 28cP, 19Ib/100ft2 against 19Ib/100ft2, and 5Ib/100ft2 against 6Ib/100ft2, showing slight difference in their rheological properties.
The standard formula of Solvency II: a critical discussion
Authors: Scherer Matthias , Stahl Gerhard
Published: November 2020

Establishing a standard formula (SF) for the regulation of European insurance companies is a Herculean task. It has to acknowledge very different business models and national peculiarities. In addition, regulatory authorities—as a stakeholder on their own—have a number of supervisory objectives the SF should incentivize. With the intervention of the SF in economic activities, the principle of equal treatment must be maintained. The large circle of users makes its procedural simplicity indispensable to ensure that it is applied and implemented in a proportionate manner. Above all, the SF should be risk-sensitive. Compared to Solvency I, the SF of Solvency II is considered a significant improvement, as many of the aforementioned desiderata have been much better realized. The following analysis and survey of model-theoretical aspects of the SF shows that these improvements could be achieved above all with regard to epistemic uncertainties. The stochastic model underneath the SF is still subject to considerable uncertainties; so that the probability functional of the SF is exposed to significant model risk. As part of the Own Risk and Solvency Assessment (ORSA), insurance companies must prove the adequacy of the SF for their company. The vague prior knowledge represented by the stochastic component of the SF is not sufficient for an SF intrinsic validation of the aleatoric component.
Applications of Nanobiomaterials in the Therapy and Imaging of Acute Liver Failure
Authors: Jin Yuanyuan , Wang Haixia , Yi Ke , Lv Shixian , Hu Hanze , Li Mingqiang , Tao Yu
Published: November 2020

Highlights

This review focuses on the therapeutic mechanisms, targeting strategies of various nanomaterials in acute liver failure, and recent advances of diverse nanomaterials for acute liver failure therapy, diagnosis, and imaging.

This review provides an outlook on the applications of nanomaterials, especially on the new horizons in acute liver failure therapy, and inspires broader interests across various disciplines.

Acute liver failure (ALF), a fatal clinical disease featured with overwhelming hepatocyte necrosis, is a grand challenge in global health. However, a satisfactory therapeutic option for curing ALF is still absent, other than liver transplantation. Nanobiomaterials are currently being developed for the diagnosis and treatment of ALF. The liver can sequester most of nanoparticles from blood circulation, which becomes an intrinsic superiority for nanobiomaterials targeting hepatic diseases. Nanobiomaterials can enhance the bioavailability of free drugs, thereby significantly improving the therapeutic effects in ALF. Nanobiomaterials can also increase the liver accumulation of therapeutic agents and enable more effective targeting of the liver or specific liver cells. In addition, stimuli-responsive, optical, or magnetic nanomaterials exhibit great potential in the therapeutical, diagnostic, and imaging applications in ALF. Therefore, therapeutic agents in combination with nanobiomaterials increase the specificity of ALF therapy, diminish adverse systemic effects, and offer a multifunctional theranostic platform. Nanobiomaterial holds excellent significance and prospects in ALF theranostics. In this review, we summarize the therapeutic mechanisms and targeting strategies of various nanobiomaterials in ALF. We highlight recent developments of diverse nanomedicines for ALF therapy, diagnosis, and imaging. Furthermore, the challenges and future perspectives in the theranostics of ALF are also discussed.
Fusion breeding as an approach to sustainable energy
Authors: Manheimer Wallace
Published: November 2020

This article examines an approach for sustainable energy called fusion breeding. This is the use of 14 meV fusion neutrons to breed fuel for thermal nuclear reactors. Currently thermal nuclear reactors use for fuel, only the isotope of uranium, 235U, which is 0.7% of the total resource. In order for nuclear power to be sustainable, it is necessary to breed nuclear fuel (233U or 239Pu) from fertile material (238U or 232Th). This resource could supply tens of terawatts for thousands of years. By any reasonable criterion, it both sustainable and carbon free. While most efforts at breeding envision fission reactors of one type or another, fusion is also a possible approach to breeding. Not only that, fusion has many advantages as a route for breeding that fission simply does not have. This article makes the case for fusion breeding.
Five steps to beating ransomware's five-minute warning
Authors: Lock Matt
Published: November 2020

When ransomware strikes an IT network, there is precious little time to react. Indeed, some accounts by IT professionals put it at less than five minutes.

At that speed it is next to impossible using manual methods to stop ransomware propagating throughout an IT system. Firms need to work on the assumption that they will be attacked at some point, and so need to put in place measures that will help them survive an attack with as little damage as possible, says Matt Lock at Varonis.

When ransomware strikes an IT network there is precious little time to react. Indeed, some accounts by IT professionals put it at less than five minutes. At that speed it is next to impossible to stop ransomware propagating throughout an IT system using manual methods.
Anthropomorphic Stelae of the 4th and 3rd Millennia Between the Caucasus and the Atlantic Ocean
Authors: Vierzig Angelika
Published: November 2020

Anthropomorphic stone stelae of monumental dimensions dated to the 4th and 3rd millennia BC have been found in southern Europe between the Atlantic Ocean and the Caucasus. They are understood as symbolic human representations the size of which arises out of a new self-awareness of humankind in the world. Anthropomorphic stelae are one of many innovations appearing during this epoch. Other innovations are copper metallurgy and tools, in particular weapons and jewellery, as well as the wheel, the wagon, and the plough drawn by animals. These innovations are depicted on stelae; what is more, the stele itself is an innovation in which the other changes are bundled. Comparable stylistic features of stelae in different areas demonstrate far-reaching contacts. Often the origin of anthropomorphic stelae is seen in the Russian steppes, with the archaeogenetically proven migration from east to west being the cause for the building of stelae in central and western Europe. However, the oldest known stelae apparently originate in western Europe. The impulses behind the dissemination of innovations must have emanated from continuous exchange relations, but the migration in the 3rd millenniumbcedid not bring with it the idea itself of anthropomorphic stelae. Nowadays the question about the function of stelae is usually answered with the representation of ancestors. When anthropomorphic stones keep the memory of common roots alive, they serve the building of identity.
Palaeomagnetism of the uppermost carbonate units of the Purana basins in southern India: new demagnetization results from the Kaladgi and Bhima basins, Karnataka
Authors: Wabo Herve , De Kock Michiel Olivier , Beukes Nicolas Johannes , Hegde Venkatraman Seetaram
Published: November 2020

Four unconformity-bound sequences can be identified in the Purana successions in southern India, of which the third sequence (Sequence III) has the widest distribution. Sequence III contains deep-water carbonate units with consistent sedimentological characteristics across the subcontinent. The current extent of field relationships and existing ages has not allowed the correlation and chronology of these carbonates to be established conclusively. Palaeomagnetism may help resolve this essential question for the Purana sedimentation. Here, we report new palaeomagnetic results (HIG+/– pole: 21.7° N, 81.1° E, radius of cone of 95% confidence A95 = 15.9°) from Sequence III carbonates in the Kaladgi (Badami Group) and Bhima (Bhima Group) basins. The HIG+/– magnetization, revealed after the removal of secondary magnetizations that include a present-day field and an Ediacaran–Cambrian overprint, is interpreted to be primary based on its dissimilarity to known younger magnetizations, the presence of distinctly different magnetic components in sites and a positive reversal test. Our HIG+/– pole differs from the c. 1.4 Ga pole and various c. 1.1 Ga and younger poles. Instead, it overlaps with the Harohalli dyke pole that was long considered to be c. 823 Ma in age, but has recently been suggested to be much older with an age of c. 1192 Ma. We therefore consider the uppermost carbonate beds of Badami and Bhima groups to have been deposited during late Mesoproterozoic times. A critical evaluation of parameters from which an earlier Neoproterozoic age for these carbonates was established indicates that the available 40Ar/39Ar, Rb–Sr and U–Pb ages in the Kaladgi and Bhima basins could reflect the timing of post-depositional alteration events.
Food preferences determine human–elephant coexistence in African woodlands
Authors: Montero-Botey María , San Miguel Alfonso , Perea Ramón
Published: November 2020

Human–elephant coexistence remains a major conservation and livelihood challenge across elephantLoxodonta africanarange in Africa. This study investigates the extent of elephant crop damage on 66 farms in the Selous–Niassa corridor (Tanzania), to search for potential management solutions to this problem. We found that the relative abundance of highly preferred crops (area covered by preferred crops divided by the total area of each farm) was by far the most important factor determining crop damage by elephants. Eighteen crop types were ranked according to their preference by elephants. Sweet potatoes, bananas, peanuts, onions, pumpkins and maize were the most preferred crops, with maize the most common crop among those highly preferred. On average elephants damaged 25.7% of the cultivated farmland they entered. A beta regression model suggests that a reduction in the cultivation of preferred crops from 75 to 25% of the farmland area decreases elephant crop damage by 64%. Water availability (distance to the nearest waterhole) and the presence of private investors (mostly hunting tourism companies) were of lower importance in determining elephant crop damage. Thus, damage by elephants increased with shorter distances to waterholes and decreased in areas with private investors. However, further studies are required, particularly of the perceived costs and benefits of elephants to local communities. Farm aggregation and the use of non-preferred crops that also require less water would potentially reduce elephant damage but would be a major lifestyle change for some local communities.
Not all rights are created equal: A loss–gain frame of investor rights and human rights
Authors: Broude Tomer , Henckels Caroline
Published: November 2020

International investment tribunals often use the language of ‘rights’ to characterize foreign investors’ claims against host states, evoking the language of human rights and, in some cases, appearing to conflate the two concepts. We investigate the cognitive framing of the relationship between investor rights and human rights in investor-state dispute settlement (ISDS), as characterized by investment tribunals. We first establish that arbitrators (and scholars and counsel) tend to characterize investor claims as rights claims in general and property rights claims in particular, even if this normative basis is far from precise. Second, building on behavioural economics and cognitive psychology, we argue that this characterization places human rights considerations at a structural disadvantage in ISDS. Investor rights are perceived by arbitrators as endowments that are possessed and that risk being lost, while the human rights of host state populations are viewed as aspirational demands that might only be fully realized in the future. Thus, governmental actions interfering with investments are perceived by arbitrators as actual losses, while competing human rights claims are perceived as potential gains or demands. Following prospect theory, the former (certain losses) will usually be weighed more heavily in a decision-making calculus than the latter (possible gains). This loss–gain frame provides a cognitive explanation for the prevalence of arbitral decisions that prefer investor claims over human rights, a phenomenon that is highly problematic in times in which the legitimacy of the ISDS system rests on its ability to consider the rights of non-investors.
Communicating with parents of children with trisomy 13 or 18 who seek cardiac interventions
Authors: Weaver Meaghann S. , Lantos John , Hauschild Kelly , Hammel James , Birge Nicole , Janvier Annie
Published: November 2020

This case report shares the story of a family who sought care elsewhere after their daughter was denied cardiac surgery in their home state because she had trisomy 18. This case report recommends case-by-case assessment of cardiac surgical interventions for children with trisomy 13 or 18 as informed by review of goals, assessment of comorbidities, and literature-informed practice. Coordinated care planning and interdisciplinary communication are relevant in cardiac surgical considerations for children with these underlying genetic conditions.
Outcomes of management of major aortopulmonary collaterals for pulmonary atresia and ventricular septal defect
Authors: Zhao Dong , Yang Keming , Feng Wei , Li Shoujun , Yan Jun , Hua Zhongdong
Published: November 2020

Objective:

This study aimed to investigate the association between long-term survival and different management of major aortopulmonary collateral arteries in patients with pulmonary atresia, ventricular septal defect, and major aortopulmonary collateral arteries.

Methods:

From November, 2009 to October, 2018, a total of 98 consecutive patients with pulmonary atresia, ventricular septal defect, major aortopulmonary collateral arteries, and hypoplastic pulmonary arteries treated with modified Blalock–Taussig shunt or right ventricle–pulmonary artery connection were included. Fifty-five patients who received occlusion or ligation of major aortopulmonary collateral arteries during or after palliative procedure were occlusion group, and the other 43 patients were no occlusion group. The early and late outcomes were compared.

Results:

The mean duration of follow-up was 30.9 months in no occlusion group and 49.8 months in the occlusion group (p < 0.001). Multivariate analysis showed that only no occlusion of major aortopulmonary collateral arteries was predictive of total mortality (Hazard Ratio: 4.42, 95% CI: 1.27 to 15.42, p = 0.02). The Kaplan–Meier survival curves confirmed that patients without occlusion of major aortopulmonary collateral arteries demonstrated worse survival as compared with the occlusion group (p = 0.013). The Kaplan–Meier survival curves of patients who underwent different palliative procedures showed no differences.

Conclusions:

For patients with pulmonary atresia, ventricular septal defect and major aortopulmonary collateral arteries when a primary repair is not feasible, those without occlusion of major aortopulmonary collateral arteries have a higher risk of death following an initial palliative procedure compared with patients who underwent occlusion of major aortopulmonary collateral arteries. The occlusion of major aortopulmonary collateral arteries is not associated with a higher rate of complete repair or better improvement of pulmonary artery growth.
Characters and Creatures
Authors: Jaffe Audrey
Published: November 2020

Humans not only err, they often err willingly and explicitly, for both pleasure and edification. We accordingly “find” faces everywhere . . . most frequently, in the “faces” in paintings. And if we look at stars, clouds, and shadows we can find anything we want to find, so great is the indeterminacy of such finding places and so willing are we, for certain purposes, to accept the most minimal likenesses as “like.”

Adena Rosmarin, The Power of Genre (1985)

Adena Rosmarin's comment is part of a wider discussion of E. H. Gombrich's idea of the role of “schema” in perceptions of art—a concept he uses to explain, among other things, how it is that observers can perceive a face in a collection of lines and dots, and, more generally, why it makes sense to say that all art begins not with nothing but with something. A snowman starts with the schema that is snow, for example, and we “work the snow and balance the shapes till we recognize a man.” And not only do we work the snow to achieve some approximation of human faces and bodies, but we find human characteristics in—or, more accurately, make characters out of—all sorts of things, living and not. Certainly, we project character onto living nonhumans, such as cats, dogs, birds, and plants, imagining that they share our feelings of love, loneliness, and desire, but we also assign character and characteristics to inanimate objects and assorted phenomena: ships, cars, and hurricanes all get names; we may talk to the toaster, or grumble at a shoelace that, we imagine, stubbornly refuses—refuses!—to untie. Thus it is hardly surprising that literary characters, intended expressly as vehicles for imaginative occupation, take on a similarly outsize quality in our psyches. Words on a page, constructions of language, they invite us to consider them as soulmates and doppelgängers; nightmare—or perhaps ideal—versions of parents, brothers, sisters, friends, and selves: the families we might have chosen if we could; the me (or not me) nobody knows.
Factors associated with childhood anaemia in Afro-descendant communities in Alagoas, Brazil
Authors: Ferreira Haroldo da Silva , Santos Laíse Gabrielly Matias de Lima , Ferreira Carla Mariana Xavier , Kassar Samir Buainain , dos Santos Tamara Rodrigues , Vasconcelos Nancy Borges Rodrigues , de Assunção Monica Lopes , Cardoso Marly Augusto
Published: November 2020

Objective:

To investigate factors associated with anaemia in preschool children.

Design:

A home survey was conducted in 2018. Anaemia in children (capillary blood Hb level < 110 g/l) was the outcome, and socio-economic, demographic and health factors of the mother and child were the independent variables. The measure of association was the prevalence ratio, and its 95 % CI was calculated using Poisson’s regression with robust variance and hierarchical selection of independent variables.

Setting:

Afro-descendants communities living in the state of Alagoas, northeast Brazil.

Participants:

Children aged 6–59 months and their mothers (n 428 pairs).

Results:

The prevalence of child anaemia was 38·1 % (95 % CI 33·5, 42·7). The associated factors with child anaemia were male sex, age < 24 months, larger number of residents at home (> 4), relatively taller mothers (highest tertile) and higher z-score of BMI for age, after further adjustment for wealth index, vitamin A supplementation in the past 6 months and clinical visit in the last 30 d.

Conclusions:

The high prevalence of anaemia observed reveals a relevant public health problem amongst children under five from the quilombola communities of Alagoas. Considering the damage caused to health and multiplicity of risk factors associated with anaemia, the adoption of intersectoral strategies that act on modifiable risk factors and increase vigilance concerning those that are not modifiable becomes urgent.
Low-loss and tunable millimeter-wave filters using spherical dielectric resonators
Authors: Dey Utpal , Marin Julio Gonzalez , Hesselbarth Jan
Published: November 2020

Millimeter-wave band-pass filters using spherical dielectric resonators are presented. The dielectric spheres are sandwiched between metal plates and are excited by a simple microstrip line structure on a thin-film circuit board. As such, these filters could also be implemented in the back-end-of-line layers of an integrated circuit. A single resonator, based on a diameter 0.6 mm alumina ceramic sphere, is shown to resonate with high unloaded Q-factor of 750 at 170 GHz. A three-sphere band-pass filter is measured showing <5 dB insertion loss and 0.4% bandwidth at 170 GHz. A concept for mechanically tuning of a two-sphere band-pass filter is demonstrated for a filter operating around 105 GHz. The measured filter shows approximately 5 dB insertion loss and <0.5% bandwidth and its passband can be varied over 3 GHz of frequency, or 3%. Technological challenges are discussed.
Effect of environmental factors on the germination and emergence of drunken horse grass (Achnatherum inebrians)
Authors: Yue Yonghuan , Jin Guili , Lu Weihua , Gong Ke , Han Wanqiang , Liu Wenhao , Wu Xueer
Published: November 2020

Drunken horse grass [Achnatherum inebrians(Hance) Keng] is a perennial poisonous weed in western China. A comprehensive understanding of the ecological response ofA. inebriansgermination to environmental factors would facilitate the formulation of better management strategies for this weed. Experiments were conducted under laboratory conditions to assess the effects of various abiotic factors, including temperature, light, water, pH, and burial depth, on the germination and seedling emergence ofA. inebrians. The seeds germinated at constant temperatures of 15, 20, 25, 30, and 35 C and in alternating-temperature regimes of 15/5, 20/10, 25/15, 30/20, 35/25, and 40/30 C, and the germination percentages under constant and alternating temperatures ranged from 51% to 94% and 15% to 93%, respectively. Maximum germination occurred at a constant temperature of 25 C, and germination was prevented at 45/35 C. Light did not appear to affect germination. The germination percentage of seeds was more than 75% in the pH range of 5 to 10, with the highest germination percentage at pH 6. The seeds germinated at osmotic potentials of 0 MPa to −1.0 MPa, but decreasing osmotic potential inhibited germination, with no germination at −1.2MPa. After 21 d of low osmotic stress, the seeds that did not germinate after rehydration had not lost their vitality. The seedling emergence percentage was highest (90%) when seeds were buried at 1 cm, but declined with increasing burial depth, with no emergence at 9 cm. Deep tillage may be effective in limiting the germination and emergence of this species. The results of this study provide useful information on the conditions necessary forA. inebriansgermination and provide a theoretical basis for science-based prediction, prevention, and control of this species.
Analysis of the Decadal Kinematic Characteristics of the Daguangbao Landslide Using Multiplatform Time Series InSAR Observations After the Wenchuan Earthquake
Authors: Luo Xingjun , Wang Changcheng , Long Yan , Yi Zhonghai
Published: November 2020

The Daguangbao landslide was the largest landslide triggered by the “5.12” Wenchuan Mw 7.9 earthquake. This landslide is among the few superlarge‐scale landslides of 1 billion m3 magnitude worldwide. As the landslide accumulation represents a potential hazard, long‐term monitoring and geological interpretation of the Daguangbao landslide is important to reveal the postsliding deformation characteristics and laws of this landslide type. To study the kinematic characteristics 10 years postearthquake, the landslide accumulation deformation was monitored in two stages using different data sets and processing methods. First, regarding the deformation 2 years postearthquake, we selected PALSAR‐1 data (21 October 2008 to 14 March 2011) and obtained the LOS (line of sight) direction time series deformation of the landslide using the Small BAseline Subset (SBAS) algorithm. Second, for the last 4.5 years of deformation, Sentinel‐1 data sets (26 November 2015 to 8 June 2020) in two ascending and one descending path are experimentally used. The vertical and east‐west deformations during this period are obtained. Thickness, topography, precipitation, and other factors are combined to analyze the landslide accumulation deformation. The landslide accumulation volume decreases under gravitational influence, shrinkage is accelerated under precipitation influence, and periodic fluctuations occur, which lag precipitation changes. The maximum vertical direction deformation rate is below 80 mm/year, and the deformation magnitude in the east‐west direction is approximately ±35 mm/year. Local deformation is still affected by the surface slope and aspect, and the overall landslide accumulation movement trend involves gathering of the eastern and western parts toward the middle. In the observation window, with the stabilization of accumulation, the deformation tends decrease.
Stability and Evolution of Fallen Particles Around the Surface of Asteroid (101955) Bennu
Authors: Amarante A. , Winter O. C. , Sfair R.
Published: November 2020

In this study, we study the dynamics of particles around Bennu. The goal is to understand the stability, evolution, and final outcome of the simulated particles around the asteroid. According to the results, the particle sizes can be divided into two main groups depending on their behavior. Particles smaller than a centimeter are quickly removed from the system by solar radiation pressure, while the dynamics of particles larger than a few centimeters is dominated by the gravitational field of Bennu. Because of its shape and spin period, Bennu has eight equilibrium points around it. The structure of the phase space near its equatorial surface is directly connected to these equilibrium points. Therefore, we performed numerical simulations to obtain information about the orbital evolution near the equilibrium points. The results show that most of the particles larger than a few centimeters fall in the equatorial region close to the Kingfisher area or close to the region diametrically opposite to it. In contrast, almost none of these particles fall in the equatorial region close to the Osprey area. In addition, we also performed computational experiments considering a spherical cloud of particles initially orbiting Bennu. Most of the particles in prograde orbits fall on the surface within our integration period, which was limited to 1.14 years. The particles preferentially fall near high‐altitude regions at low equatorial latitudes and close to the north pole. The mid‐latitudes are those more depleted of falls, as in the Nightingale and Sandpiper areas.
Gravity Waves Leave Ripples Across a Glowing Night Sky
Authors: Lee Jack
Published: November 2020

A thunderstorm made waves on a rare “bright night.”
FinIrrSDA: A 3‐D Model for Magnetic Shape and Distribution Anisotropy of Finite Irregular Arrangements of Particles With Different Sizes, Geometries, and Orientations
Authors: Biedermann Andrea Regina
Published: November 2020

The magnetic anisotropy carried by strongly magnetic particles such as magnetite or ferrofluid‐filled pores is generally composed of shape anisotropy and distribution anisotropy. Their relative importance in rocks depends on numerous factors and has been discussed controversially. A major challenge in estimating their contributions so far has been that models for distribution anisotropy only exist for regular arrangements of equal particles along lines or in planes. Because magnetite grains or pores in rocks display wide ranges of orientations, shapes, and sizes in generally irregular arrangements, new models are needed to describe distribution anisotropy for more realistic grain and pore assemblies. The model presented in this study, FinIrrSDA, calculates shape and distribution anisotropy for finite irregular assemblies of unequal particles with different orientations. Input parameters are provided as a table with x, y, and z coordinates of the particle centers and the lengths and orientations of the major, intermediate, and minor axes of best fit ellipsoids. The model output consists of two susceptibility tensors: (1) the shape anisotropy tensor and (2) the total tensor combining shape and distribution anisotropies. FinIrrSDA can be applied to a wide range of input data sets, including known structures of synthetic samples, particle analyses from tomography data, and, subject to certain assumptions, 2‐D images. The model will hopefully increase our understanding of the interplay between shape and distribution anisotropies in natural rocks and facilitate future interpretations of both the magnetic anisotropy carried by magnetite grains and magnetic pore fabrics.