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Large-scale field research is providing extensive data on the prehistoric settlement history of the Bayuda Desert in Sudan. The authors briefly examine notable outputs from the project, including some of the more than 100 radiocarbon dates that permit a more nuanced understanding of the chronology of settlement pattern changes.
The obligation of stability generally requires host States to maintain a relatively stable regulatory framework to mitigate political risks facing foreign investments. It has played a significant role in international investment tribunals’ review of host States’ renewable energy transition policies. This paper critically reviews tribunals’ interpretation of the obligation with a particular focus on the Spanish cases involving renewable energy incentive schemes. It canvasses the two ‘dimensions’ adopted by investment tribunals in the interpretation of stability, namely the protection of legitimate expectations and States’ right to regulate for public purposes. Examining the contents of the two dimensions separately, this paper argues that legal stability should be disentangled from the notion of legitimate expectations and be assessed through the reasonableness of regulatory changes per se. It further argues that an intrusive interpretation of legal stability lacks legal and institutional bases; instead, more deferential standards should be adopted in the review of renewable energy transition policies.
Bioethics education in residency helps trainees achieve many of the Accreditation Council for Graduate Medical Education milestones and gives them resources to respond to bioethical dilemmas. For this purpose, The Providence Center for Health Care Ethics has offered a robust clinical ethics rotation since 2000. The importance of bioethics for residents was highlighted as the COVID-19 pandemic raised significant bioethical concerns and moral distress for residents. This, combined with significant COVID-19-related practical stressors on residents led us to develop a virtual ethics rotation. A virtual rotation allowed residents flexibility as they were called to help respond to the unprecedented demands of a pandemic without compromising high quality education. This virtual rotation prioritized flexibility to support resident wellbeing and ethical analysis of resident experiences. This article describes how this rotation was able to serve residents without overstraining limited bandwidth, and address the loci of resident pandemic distress. As pandemic pressures lessened, The Providence Center for Health Care Ethics transitioned to a hybrid rotation which continues to prioritize resident wellbeing and analysis of ongoing stressors while incorporating in-person elements where they can improve learning. This article provides a description of the rotation in its final form and resident feedback on its effectiveness.
Dietary Mn intake may have a beneficial effect in reducing cancer risk; however, its association with thyroid cancer (TC) risk remains inadequately understood. Additionally, Mn was associated with inflammation markers. Thus, we examined whether dietary Mn intake emerges a protective role against TC and whether this preventative effect has an interaction with IL1 receptor type 1 (IL1R1) rs3917225. The prospective study was designed at National Cancer Center in Korea between October 2007 and December 2020 including 17 754 participants. We identified TC cases by following participants until December 2020. Mn intake was collected using a semiquantitative food frequency questionnaire (SQFFQ). Genotyping was performed to determine IL1R1 rs3917225. The hazard ratios (HR) and 95 % confidence interval (CI) were calculated with a Cox proportional hazards model. We ascertained 108 incident TC cases throughout follow-up duration. Dietary Mn intake was found to be inversely associated with TC risk (HR (95 % CI)=0·64 (0·44, 0·95)). However, IL1R1 rs3917225 seemed to modify this association; the protective effect was limited to G-allele carriers (HR = 0·30 (0·11, 0·86), P interaction=0·028). A higher dietary Mn was suggested to be a protective factor against TC. Additionally, we drew a potential biological interaction between Mn intake and IL1R1 rs3917225 with a greater effect among individuals with a minor allele. This implies that when considering the cancer-preventive role of Mn, it is important to account for the influence of inflammatory gene participation.
In this work, we propose a novel approach for tomato pollination that utilizes visual servo control. The objective is to meet the growing demand for automated robotic pollinators to overcome the decline in bee populations. Our approach focuses on addressing this challenge by leveraging visual servo control to guide the pollination process. The proposed method leverages deep learning to estimate the orientations and depth of detected flower, incorporating CAD-based synthetic images to ensure dataset diversity. By utilizing a 3D camera, the system accurately estimates flower depth information for visual servoing. The robustness of the approach is validated through experiments conducted in a laboratory environment with a 3D printed tomato flower plant. The results demonstrate a high detection rate, with a mean average precision of 91.2 %. Furthermore, the average depth error for accurately localizing the pollination target is impressively minimal, measuring only 1.1 cm. This research presents a promising solution for tomato pollination, showcasing the effectiveness of visual-guided servo control and its potential to address the challenges posed by diminishing bee populations in greenhouses.
We study a maximal average along a family of curves $\{(t,m(x_1)\gamma(t)):t\in [-r,r]\}$, where $\gamma|_{[0,\infty)}$ is a convex function and m is a measurable function. Under the assumption of the doubling property of $\gamma'$ and $1\leqslant m(x_1)\leqslant 2$, we prove the $L^p(\mathbb{R}^2)$ boundedness of the maximal average. As a corollary, we obtain the pointwise convergence of the average in r > 0 without any size assumption for a measurable m.
This paper presents a pattern reconfigurable antenna that accomplishes wideband and multibeam characteristics. The antenna design comprises a cross-slot radiator as the primary element and reconfigurable partially reflecting surface (PRS) layer placed above and below the cross-slot radiator. This configuration allows the antenna to adapt its radiation patterns effectively. The choice of the cross-slot radiator is based on its capability to offer wideband characteristics. The PRS layer consists of a precisely arranged array of 4×4 unit cells, incorporating PIN diodes into both the upper and lower PRS layers. The direction of radiation pattern can be changed by altering operating states of the PIN diodes on the PRS layer. The antenna operates in three distinct states, each exhibiting a unique radiation pattern. The antenna produces broadside, backward, and bidirectional radiation patterns. It demonstrates effective pattern reconfigurability across the frequency range of 3.10–3.86 GHz (21.71%), with a peak gain of 9.60 dBi. The simulated and measured results of the antenna are found to be in good agreement.
This paper establishes an extreme $C^k$ reducibility theorem of quasi-periodic $SL(2, \mathbb {R})$ cocycles in the local perturbative region, revealing both the essence of Eliasson [Floquet solutions for the 1-dimensional quasi-periodic Schrödinger equation. Comm. Math. Phys.146 (1992), 447–482], and Hou and You [Almost reducibility and non-perturbative reducibility of quasi-periodic linear systems. Invent. Math.190 (2012), 209–260] in respectively the non-resonant and resonant cases. By paralleling further the reducibility process with the almost reducibility, we are able to acquire the least initial regularity as well as the least loss of regularity for the whole Kolmogorov–Arnold–Moser (KAM) iterations. This, in return, makes various spectral applications of quasi-periodic Schrödinger operators wide open.
When archaeologists discuss ‘ancestor cults’ or ‘ancestor veneration’, what this might entail in practice usually remains vague, leading to charges that the concept of ‘ancestors’ is often applied generically. In this article, the authors combine bioarchaeological, taphonomic, radiocarbon, and isotopic studies to explore the ritual practice of the selective retention, curation, and deposition of a group of human crania and mandibles. Between 5500–5400 bc, Neolithic people at Masseria Candelaro (Puglia, Italy) deposited broken crania and mandibles from about fifteen individuals in a heap in the centre of the village. These individuals were mostly probable males, collected over the course of two centuries and actively used, with their deposition marking the final disposal of a ritual collection. The motivations for the curation of cranial bone are investigated through comparison with archaeological and ethnographic examples, advancing an interpretation of ritual practice directed towards ancestors.
In an effort to institutionalize NATO prehospital medical best practice standards, and to reduce preventable morbidity and mortality from Russian conventional weapon systems and irregular and multidomain warfare, the US-based non-governmental humanitarian organization HEAL Corp supported Subject Matter Experts (SMEs) through a working group to establish a fit for purpose curriculum for Ukrainian battlefield medics with the National Academy of the Ministry of Internal Affairs (MoIA) for Ukraine.
Methods
The curriculum working group culminated in the delivery of the pilot course in Ukraine. The institutionalization of Modules for training on combat medics may offer a fit for purpose, sustainable and standardized approach for NATO standardization and to rapidly reduce morbidity and mortality for warfighters.
Results
This short report describes the methodology, implementation and evaluation of the Trauma, Resuscitation and Evacuation in Combat Course (“TRECC”) curriculum and course delivery which is a product of the working group and program series with novel approaches and lessons learned for future iterations.
Conclusion
The institutionalization of Modules for training on combat medics may offer a fit for purpose, sustainable and standardized approach for NATO standardization and to rapidly reduce morbidity and mortality for warfighters.
This article examines the alignment of bilateral investment treaties (BITs) with domestic development policies. The analysis reveals the presence of considerable disparity between Ethiopian BITs and the country's domestic development policies and the importance of ensuring consistency between the two. The potential options to resolve this disparity can be combined on a case-by-case basis, depending on different challenges, such as bargaining power, political commitment, procedural requirements and resistance from other treaty partners. The changing dynamics of global politics and the growing backlash against BITs have created a conducive environment for such reform.
In the employment context, non-competes are contractual terms which provide that once the employment ends the employee cannot work for another employer in the same industry or field (i.e. a competitor), within a specified geographic area, for a specified time. The existing law and practice regarding non-competes in Australia is plagued with confusion and uncertainty. Non-competes also have adverse economic consequences; they are associated with reduced employee mobility and consequent negative impacts on wages and productivity.
The use of non-competes by Australian business has increased over the past 5 years and absent a policy response; this trend is likely to continue. Non-competes are no longer limited to highly paid executives but now apply to about one in five Australian workers, across income, age, occupational, and education groups.
The distribution and prevalence of non-competes in Australia are broadly consistent with data in other developed economies. A number of jurisdictions within the Organisation for Economics Co-operation and Development have imposed restrictions on the use of non-competes. The US Federal Trade Commission is considering a ban on their use and, in the UK, the government has announced its intention to limit the term of non-competes to 3 months. In Australia, the Competition Minister has recently asked the Australian Competition and Consumer Commission and Treasury for advice on the competitive aspect of non-competes. The Australian Government released an Issues Paper (https://treasury.gov.au/sites/default/files/2024-04/c2024-514668-issues-paper.pdf#page40) – ‘Non-competes and other restraints: understanding the impacts on jobs, business and productivity’ in April 2024. The Issues Paper outlines the existing research and evidence in Australia and overseas on the use and effects of non-competes. A public consultation process will conclude in May 2024 and Treasury will advise the Government on the outcomes of the consultations by the end of 2024.
After reviewing the arguments for and against restricting the ‘reach’ of non-competes, I conclude that the weight of the evidence favours a regulatory response to ameliorate the unfairness inherent in the existing law and practice. A number of possible regulatory responses are considered.
In China, both governments and civil institutions play important roles in non-profit regulation. However, with various regulatory instruments available, it remains unclear which has the strongest public support and most effectively promotes civic engagement. This study compared the impact of different non-profit regulatory instruments addressing information disclosure on two aspects of civic engagement intention: willingness to donate and willingness to volunteer. A survey experiment was conducted to analyse the perspectives of 939 Chinese participants on four types of regulation: no regulation, civil regulation, accommodative government regulation and deterrent government regulation. Results showed that regulation was preferred to no regulation and deterrent government regulation was preferred to accommodative government regulation, which was preferred to civil regulation. Additionally, public trust in non-profits significantly mediated the relationship between regulation and civic engagement intention. These findings suggest that government regulation, particularly the deterrent approach, garners strong public support and may be prioritized within the Chinese context.
The reflection of a shock pulse at a liquid–gas interface occurs in many applications, from lithotripsy to underwater explosions and additive manufacturing. In linear theory, reflection and transmission at an interface depend only on the impedance difference, but this does not hold for a nonlinear pulse. This work develops an analytical framework for computing the reflection and transmission coefficients for an impulsive shock wave at a liquid–gas interface. The problem is treated analytically by considering idealised pulses and solving a series of consecutive Riemann problems. These correspond to the initial interaction with the interface and important subsequent wave interactions that enable a complete description of the process to be obtained. Comparisons with numerical and existing analytical approaches are made for the case of a water–air interface. In the acoustic limit, the method produces results identical to those of linear acoustic theory. As the pulse strength increases, the proposed method agrees well with numerical simulation results, whereas existing analytical methods that consider only the interface fail. We detail how a reflecting pulse can put water into tension without any incident negative pressure. It is further shown that the magnitude of the reflection coefficient decreases with increasing incident shock pressure, and the reflected pulse widens. Reflections of pulses with positive and negative pressures temporarily create negative pressure regions with greater magnitude than the incident pulse. Finally, we consider non-idealised waves. Comparisons with simulations show that the reflection characteristics can be explained qualitatively using the analytical method, and the reflection coefficients are predicted accurately.
Turbulent convection in the interiors of the Sun and the Earth occurs at high Rayleigh numbers $Ra$, low Prandtl numbers $Pr$, and different levels of rotation rates. To understand the combined effects better, we study rotating turbulent convection for $Pr = 0.021$ (for which some laboratory data corresponding to liquid metals are available), and varying Rossby numbers $Ro$, using direct numerical simulations in a slender cylinder of aspect ratio 0.1; this confinement allows us to attain high enough Rayleigh numbers. We are motivated by the earlier finding in the absence of rotation that heat transport at high enough $Ra$ is similar between confined and extended domains. We make comparisons with higher aspect ratio data where possible. We study the effects of rotation on the global transport of heat and momentum as well as flow structures (a) for increasing rotation at a few fixed values of $Ra$, and (b) for increasing $Ra$ (up to $10^{10}$) at the fixed, low Ekman number $1.45 \times 10^{-6}$. We compare the results with those from unity $Pr$ simulations for the same range of $Ra$ and $Ro$, and with the non-rotating case over the same range of $Ra$ and low $Pr$. We find that the effects of rotation diminish with increasing $Ra$. These results and comparison studies suggest that for high enough $Ra$, rotation alters convective flows in a similar manner for small and large aspect ratios, so useful insights on the effects of high thermal forcing on convection can be obtained by considering slender domains.