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Roughness of the surface underlying the atmospheric boundary layer causes departures of the near-surface scalar and momentum transport in comparison with aerodynamically smooth surfaces. Here, we investigate the effect of $56\times 56$ homogeneously distributed roughness elements on bulk properties of a turbulent Ekman flow. Direct numerical simulation in combination with an immersed boundary method is performed for fully resolved, three-dimensional roughness elements. The packing density is approximately $10\,\%$ and the roughness elements have a mean height in wall units of $10 \lesssim H^+ \lesssim 40$. According to their roughness Reynolds numbers, the cases are transitionally rough, although the roughest case is on the verge of being fully rough. We derive the friction of velocity and of the passive scalar through vertical integration of the respective balances. Thereby, we quantify the enhancement of turbulent activity with increasing roughness height and find a scaling for the friction Reynolds number that is verified up to $Re_\tau \approx 2700$. The higher level of turbulent activity results in a deeper logarithmic layer for the rough cases and an increase of the near-surface wind veer in spite of higher $Re_\tau$. We estimate the von Kármán constant for the horizontal velocity $\kappa _{m}=0.42$ (offset $A=5.44$) and for the passive scalar $\kappa _{h}=0.35$ (offset $\mathbb {A}=4.2$). We find an accurate collapse of the data under the rough-wall scaling in the logarithmic layer, which also yields a scaling for the roughness parameters $z$-nought for momentum ($z_{0{m}}$) and the passive scalar ($z_{0{h}}$).
This article analyzes the assemblages of humans and other-than-humans that animated the sacred landscape of Cerro de la Virgen, a hilltop site occupied during the Formative period (1800 BC–AD 250) in the lower Río Verde Valley of coastal Oaxaca, Mexico. Commensalism in the region increased markedly in scope and complexity throughout the Formative period, culminating in the region's first polity at AD 100. Feasting practices became relatively standardized, but the placement of objects and bodies in public architecture—a set of collective practices associated with the vital forces that animated the cosmos—varied considerably from site to site during the late Terminal Formative period (150 BC–AD 250). Lower Verde scholars have argued that these idiosyncrasies reflect the myriad collective identities of the region's hinterland communities, a pattern rooted in local affiliations that may have conflicted with an expanding regional identity centered at the urban center of Río Viejo. I augment this discussion by highlighting the role that the materiality of the landscape, present before humans even occupied the region, played in the construction of collective identity. I develop an interpretive approach that pays special attention to Indigenous concepts of ontology, particularly those related to animacy and its transference, and uses the semiosis of American philosopher Charles Peirce to elucidate meaning from deposits of cached objects. The animate qualities assembled through fired clay and chiseled stone at Cerro de la Virgen afforded a ritual pattern that was unique in coastal Oaxaca at the end of the Formative period.
When admitting patients to hospital and treating them, psychiatrists and other health professionals may need to deprive them of their liberty. Where this occurs, professionals will need to work within a statutory framework to practice legally and protect their patients’ right to liberty under Article 5 of the European Convention on Human Rights. Within England and Wales, some clinical scenarios will require a choice to be made between the Mental Health Act 1983 (MHA) and the Mental Capacity Act 2005 (MCA) and its Deprivation of Liberty Safeguards (DoLS). This choice can be complex, is often overlooked and frequently misunderstood in clinical practice. Deciding between the two frameworks must be done on a case-specific basis. With the use of code of practice guidelines, case law and an unfolding clinical scenario we aim in this article to support clinicians in taking a clear-sighted approach to the dilemma and the factors to consider when deciding between the two regimes.
The typological, technological, and use-wear analyses of obsidian artifacts from Terminal Classic Pook's Hill (AD 830–950+) provide opportunities to better reconstruct socioeconomic activities in this plazuela group, including long-distance trade, tool production, subsistence practices, domestic tasks, and the organization of craft production. Based on visual sourcing, most of the obsidian originated from highland Guatemala, specifically El Chayal. The majority of obsidian artifacts were prismatic blades, although both casual and bipolar reduction of blade cores and the recycling of blades from earlier occupations occurred at the site. Use-wear analysis reveals that obsidian tools were mainly used for subsistence and domestic household activities; however, the concentrations of tools with specific wear patterns (bone, ceramic, plants, and shell) at some locations in the plazuela provide evidence for local craft production among the population. Further support for craft production is provided by comparable use-wear on chert/chalcedony tools from these same locations. The products of low-level craft production were used within Pook's Hill itself and may have been distributed to neighboring communities within the Roaring Creek and Upper Belize River Valleys. Despite the sociopolitical and socioeconomic disruptions to lifeways that accompanied the Terminal Classic period, the Pook's Hill Maya seem to have experienced minimal upheaval in their daily lives and continued local low-level craft production. However, one important change in the Terminal Classic appears to be the increased difficulty in obtaining obsidian at Pook's Hill and the growing need for tool recycling and raw material conservation.
In recent years, there has been an alarming increase in both proposed and enacted legislation that targets diversity, equity, and inclusion (DEI) initiatives within higher education and organizations. These laws aim to dismantle protections and support for vulnerable individuals and groups. In this focal article, we provide an overview of the motives driving these anti-DEI legislative initiatives and categorize the laws based on the type of restrictions they impose: (a) reduction in knowledge, (b) reduction in access, and (c) reduction in support. Next, we discuss the consequences these anti-DEI laws yield for individuals, organizations, and society at large and provide an overview of how individuals and organizations may counteract these regressive policies. Last, we conclude with a call to action for I-O psychologists to investigate and call attention to the consequences of anti-DEI laws for recruitment and selection, well-being and safety of minoritized individuals, organizational reputation, and organizational performance and profits.
Beginning from 1832, the Democratic Party required a two-thirds majority at national conventions for the nomination of presidential candidates. Despite assessments that this “two-thirds rule” produced excessively long and disruptive nomination battles and low-quality presidential candidates, the rule survived until 1936. The rule's longevity is generally attributed to it functioning as a “Southern veto”: while the Democratic Party performed strongest electorally in the South in this period, the region's representation at conventions was small in comparison. By setting the bar for presidential nominations high, the South was given the ability to block unacceptable candidates. However, while the “Southern veto” argument is pervasive, there are little data and few concrete examples of Southern delegates blocking Democratic nominations through the two-thirds rule. In this paper, I reassess the two-thirds rule's history and appliance and show that Southern states barely had enough votes to block nominations and generally would need to vote against a candidate at a rate of nearly 90 percent to do so. As a result, the South almost never vetoed candidates: in only one case (Martin Van Buren in 1844) was Southern opposition pivotal in preventing a candidate with majority support from winning the nomination. Additionally, the two-thirds rule was generally accepted by broad majorities in the party (both Southern and non-Southern) and, while Southerners were among the defenders of the rule, representatives of the region were also among those opposing it. These findings suggest that the two-thirds rule rarely functioned as a Southern veto—not because the South had no power in the Democratic Party but because the necessity of maintaining intraparty consensus applied regardless of the existence of the two-thirds rule.
The rapid evolution of digital technology has made it necessary to examine the digital transformation and firms’ innovation initiatives. However, prior studies have often oversimplified the relationship between ‘digital transformation’ and ‘innovation’ as linear. By integrating perspectives from search and recombination, attention-based views, and competitive strategy theory, this paper constructs a theoretical framework, revealing that the relationship between digital transformation and innovation is nonlinear. We analyzed 21,509 observations from 2,565 Chinese listed companies spanning the period from 2009 to 2019 and found an inverted U-shaped relationship between digital transformation and innovation. We also discovered that differentiation strategies and cost leadership strategies have different moderating impacts on this inverted U-shape. This study provides valuable insights for businesses seeking to effectively navigate the complexities of digital transformation and innovation.
This article examines the Whig Party’s conception of the presidency and argues that it failed to take hold because the idea of an executive which is subordinate or deferential to the legislative branch is fundamentally at odds with the Constitution. To show this, I assess the four presidents from the Whig Party: William Henry Harrison, John Tyler, Zachary Taylor, and Millard Fillmore. Each of these presidents entered office supporting the Whigs’ ideological vision of legislative supremacy and weak executive power, yet quickly abandoned that vision once in office. I contend that this demonstrates the constitutional logic of the presidency and the way it shapes the officeholder’s perspective, orienting presidents toward a robust understanding of executive power. In short, presidents do not act like Whigs because the Constitution directs them not to.
La agricultura fue una actividad fundamental de las comunidades aldeanas de las tierras altas de Arica en los Andes centro sur, durante el período Intermedio tardío (1100-1450 dC), hasta convertirse en uno de los principales propósitos de la expansión inca en la región en los siglos quince y dieciséis. Este trabajo presenta el hallazgo, en la cuenca alta del Valle de Azapa, de maquetas o infraestructuras agrícolas grabadas en miniatura. Caracterizamos sus formas y soportes, examinamos su distribución en los territorios tardíos de la región y las contrastamos a macroescala regional con evidencias similares. Finalmente, discutimos su vínculo con el flujo de conocimientos y experiencias relativos al manejo del agua y la topografía, junto con la ritualización del paisaje agrícola en tiempos incas.
In 2015, President Xi Jinping proclaimed the principle of the Sinicization of religions. Since then, it has become the Communist Party's guiding thought in religious governance. However, so far little is known about how it is perceived by everyday religious practitioners, especially Christians. Based on textual analysis of speeches and writings by leaders of the Catholic Church in China, and 50 in-depth interviews with Catholic practitioners from the mainland and Hong Kong, this paper examines how Catholics (en)counter the public transcript created by the state. Church leaders at the national level publicly embrace Sinicization and appropriate the Church's teaching on inculturation, another transcript, as its justification. However, the everyday practitioners interviewed for this study refused to embrace this discourse. Instead, they adopted one of three discursive strategies: rejection, evasion and empathy. All fell short of endorsing the state's discourse. The findings suggest that the Church's transcript enables Catholic practitioners to critically (en)counter the state's transcript.