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The literature on democratization has experienced radical mood swings in recent decades, from extreme optimism in the 1990s to extreme pessimism today. These mood swings have resulted in not only misguided claims about the state of democracy in the world but also a muddied understanding of what drives both democratization and democratic erosion.
Intentional mass-casualty incidents (IMCIs) involving motor vehicles (MVs) as weapons represent a growing trend in Western countries. This method has resulted in the highest casualty rates per incident within the field of IMCIs. Consequently, there is an urgent requirement for a timely and accurate casualty estimation in MV-induced IMCIs to scale and adjust the necessary health care resources.
Study Objective:
The objective of this study is to identify the factors associated with the number of casualties during the initial phase of MV-IMCIs.
Methods:
This is a retrospective, observational, analytical study on MV-IMCIs world-wide, from 2000-2021. Data were obtained from three different sources: Targeted Automobile Ramming Mass-Casualty Attacks (TARMAC) Attack Database, Global Terrorism Database (GTD), and the vehicle-ramming attack page from the Wikipedia website. Jacobs’ formula was used to estimate the population density in the vehicle’s route. The primary outcome variables were the total number of casualties (injured and fatalities). Associations between variables were analyzed using Spearman’s correlation coefficient and simple linear regression.
Results:
Forty-six MV-IMCIs resulted in 1,636 casualties (1,430 injured and 206 fatalities), most of them caused by cars. The most frequent driving pattern was accelerating whilst approaching the target, with an average speed range between four to 130km/h and a distance traveled between ten to 2,260 meters. The people estimated in the MV-IMCI scenes ranged from 36-245,717. A significant positive association was found of the number affected with the estimated crowd in the scene (R2: 0.64; 95% CI, 0.61-0.67; P <.001) and the average vehicle speed (R2: 0.42; 95% CI, 0.40-0.44; P = .004).
Conclusion:
The estimated number of people in the affected area and vehicle’s average speed are the most significant variables associated with the number of casualties in MV-IMCIs, helping to enable a timely estimation of the casualties.
In nature and engineering applications, water jet plunging acts as a key process causing interface breaking and generating mixed-phase turbulence. In this paper, high-resolution numerical simulations of the plunging of a water jet into a quiescent pool were performed to investigate the statistical properties of mixed-phase turbulence, with a special focus on the closure problem of the Reynolds-averaged equation. We conducted phase-resolved simulations, with the air–water interface captured using a coupled level-set and volume-of-fluid method. Various cases were performed to analyse the effects of the Froude number and Reynolds number. The simulation results showed that the turbulence statistics are insensitive to the Reynolds number under investigation, while the Froude number influences the flow properties significantly. To investigate the closure problem of the mean momentum equation, the turbulent kinetic energy (TKE) and turbulent mass flux (TMF) and their transport equations were analysed further. It was discovered that the balance relationship of the TKE budget terms remained similar to many single-phase turbulent flows. The TMF is an additional unclosed term in mixed-phase turbulence over the single-phase turbulence. Our simulation results showed that the production term in its transport equation was highly correlated to TKE. Based on this finding, a closure model for the production term of TMF was further proposed.
In Central Asia, the Soviet state had destroyed most Islamic institutions by the late 1930s, which gradually alienated millions of Soviet Muslims from the basics of Islamic theology and key Islamic practices of virtue cultivation, including the five daily prayers (namaz), Islamic ethics of dressing (like covering certain parts of the body), and certain lifestyle prescriptions (such as the avoidance of alcohol, gambling, and premarital sex). As a result, mainstream Islam in Central Asia came to revolve around the main Islamic life-cycle rites (i.e., male circumcision, the marriage ceremony, and funeral prayer) and occasional practices of uttering blessings, reciting short Qur’anic verses for the souls of the deceased, and visiting shrines, among others. Although more than thirty years have passed since the fall of the USSR, this non-observant form of Islam remains widespread in the region. Inquiring into the conceptual and affective aspects of Soviet forced secularization in Central Asia, I make two interrelated interventions into secularism studies and the anthropology of Islam. First, I theorize Soviet secularism through attending to the modern state’s aspiration to transcend and transform the particularities of lived traditions, which reveals significant overlaps between communist and liberal modes of statecraft and subject formation. Second, reflecting on a non-observant form of Islam in contemporary Kyrgyzstan, I ask: what remains of a tradition of virtue ethics when its modes of abstract reasoning and virtue cultivation have all but vanished?
During the past decade, analyses drawing on several democracy measures have shown a global trend of democratic retrenchment. While these democracy measures use radically different methodologies, most partially or fully rely on subjective judgments to produce estimates of the level of democracy within states. Such projects continuously grapple with balancing conceptual coverage with the potential for bias (Munck and Verkuilen 2002; Przeworski et al. 2000). Little and Meng (L&M) (2023) reintroduce this debate, arguing that “objective” measures of democracy show little evidence of recent global democratic backsliding.1 By extension, they posit that time-varying expert bias drives the appearance of democratic retrenchment in measures that incorporate expert judgments. In this article, we engage with (1) broader debates on democracy measurement and democratic backsliding, and (2) L&M’s specific data and conclusions.
In this article, we investigate the reasons behind the puzzling enthusiastic reception of a book about Finland’s national development by Turkish nationalist intellectuals in the early Republic of Turkey. Published in Turkish in 1928, the developmental model laid out in Petrov’s The Country of White Lilies resonated with the Turkish intelligentsia and has remained a popular book in Turkey throughout the twentieth century, and even today. First, we compare the fictionalized developmental model presented by Petrov in his book with Finnish development under the Russian Empire, before its independence in 1917. Second, we show that this reception was largely based on a comparison of Turkey and Finland’s geopolitical positions in global imperial politics, and a constructed racial affinity between the two nations in the minds of Turkish readers. Third, we argue that this national developmental model served three ideological purposes; distancing the Turkish Republic from the Ottoman Empire, showing the developmental capacity of nations outside the linear and paternalistic developmental model proposed by Western European empires, and last, presenting a model that glosses over Ottoman-Turkish state violence and ethnic cleansing, as well as democratic processes, as irrelevant to considerations of progress and development. Finally, we discuss the implications of our study for re-evaluating the sociological literature on nation formation, largely taking its “model cases” (Krause 2021) from the Western European experience, through a more encompassing inter-imperial approach (Doyle 2014).
Surveillance of hospital-acquired infections (HAIs) is the foundation of infection control. Machine learning (ML) has been demonstrated to be a valuable tool for HAI surveillance. We compared manual surveillance with a supervised, semiautomated, ML method, and we explored the types of infection and features of importance depicted by the model.
Methods:
From July 2021 to December 2021, a semiautomated surveillance method based on the ML random forest algorithm, was implemented in a Brazilian hospital. Inpatient records were independently manually searched by the local team, and a panel of independent experts reviewed the ML semiautomated results for confirmation of HAI.
Results:
Among 6,296 patients, manual surveillance classified 183 HAI cases (2.9%), and a semiautomated method found 299 HAI cases (4.7%). The semiautomated method added 77 respiratory infections, which comprised 93.9% of the additional HAIs. The ML model considered 447 features for HAI classification. Among them, 148 features (33.1%) were related to infection signs and symptoms; 101 (22.6%) were related to patient severity status, 51 features (11.4%) were related to bacterial laboratory results; 40 features (8.9%) were related to invasive procedures; 34 (7.6%) were related to antibiotic use; and 31 features (6.9%) were related to patient comorbidities. Among these 447 features, 229 (51.2%) were similar to those proposed by NHSN as criteria for HAI classification.
Conclusion:
The ML algorithm, which included most NHSN criteria and >200 features, augmented the human capacity for HAI classification. Well-documented algorithm performances may facilitate the incorporation of AI tools in clinical or epidemiological practice and overcome the drawbacks of traditional HAI surveillance.
Recent election cycles show a reluctance among Black millennials to support the Democratic Party, which suggests that they are not captured by the party like their predecessors. While we know that African Americans have historically remained a loyal voting bloc, it is important to analyze whether there are generational differences with respect to Black Democratic Party loyalty. In this study, I analyze Black millennial partisanship identification and compare it to Black non-millennials (Baby Boomers and Gen X’ers). To test this, I employ a multi-method approach. My results show that while Black millennials continue to identify with the Democratic Party, they are not as loyal to the Democratic Party when compared to Black non-millennials. Further, I find that Black millennials are not changing loyalties to the Republican or a third party. Instead, Black millennials are willing to withhold their vote altogether if they are not satisfied with any Democratic candidates. My work has critical implications in how we understand Black politics and reveals that Democratic candidates will have to earn Black millennials vote going forward.
The algebraic mapping torus $M_{\Phi }$ of a group $G$ with an automorphism $\Phi$ is the HNN-extension of $G$ in which conjugation by the stable letter performs $\Phi$. We classify the Dehn functions of $M_{\Phi }$ in terms of $\Phi$ for a number of right-angled Artin groups (RAAGs) $G$, including all $3$-generator RAAGs and $F_k \times F_l$ for all $k,l \geq 2$.
Shortly after the start of colonial rule in Northern Nigeria, a series of scandals over flogging brought international attention. A network of newspapers reported on flogging cases, particularly those involving women and educated, often Christian, Africans from outside the north. International attention focused on these cases as humanitarian outrages. The Nigerian administration and the Colonial Office deflected the scandals through a shifting series of strategies: justifying flogging as appropriate and humane, attempting to ensure floggings were only administered by Africans, carefully regulating the practices of flogging, and investigating cases of flogging to exculpate the officials responsible. These scandals led to a reform of the criminal justice system in 1933, but had long-lasting effects. They entrenched the trope of whipped bodies as a particularly “African” outrage. They helped to institutionalize the notion that particular judicial and governmental techniques were culturally specific. They politicized key markers of personal identity.
The paper presents the results of an experimental and numerical study of turbulent thermal convection in a rectangular box containing an extended immersed free-floating plate. Varying the values of control parameters, such as Rayleigh number, aspect ratio and vertical position of the plate, provides a wide range of possible modes, from immobile and purely periodic to stochastic. We have shown that stable periodic motions occur when the plate floats close to one of the heat exchangers. An increase in the distance between the plate and the heat exchanger breaks the periodic motion and (at moderate Rayleigh numbers) leads to a pronounced asymmetry, when the plate stays close to one of the walls most of the time, makes rare excursions to the opposite wall and immediately returns. As the Rayleigh number increases, the plate motions from one edge of the box to the other reappear, but always have an irregular character. Regarding the dependence of the system behaviour on the geometry of the box, both lower and upper limits of periodic plate motions were found in the experiments. In the numerical simulations, the upper limit was not achieved – the plate moves quasi-periodically through the chain of vortices of different signs even at the largest aspect ratio being considered. The heat-insulating floating plate provides the spatial and temporal variation of the heat flux and reduces the integral heat flux, but the reduction in heat flux depends significantly on the vertical position of the plate.
The presence of monitoring institutions affects quality and effort of leaders. We investigate the effect of intensified monitoring on the ability and effort of leaders for a sample of forest user groups in Ethiopia, and find experimental and non-experimental evidence of an important trade-off: monitoring increases leaders' effort but lowers their quality in terms of education and experience. This effort–ability trade-off only occurs in the presence of alternative income opportunities (affecting the opportunity cost of time) and only among a subsample of leaders with low prosocial motivation. For our context, we document that the net effect of monitoring on economic outcomes is positive.
Multiple well-known democracy-rating projects—including Freedom House, Polity, and Varieties of Democracy (V-Dem)—have identified apparent global regression in recent years. These measures rely on partly subjective indicators, which—in principle—could suffer from rater bias. For instance, Little and Meng (2023) argue that shared beliefs driven by the current zeitgeist could lead to shared biases that produce the appearance of democratic backsliding in subjectively coded measures. To assess this argument and the strength of the evidence for global democratic backsliding, we propose an observable-to-subjective score mapping (OSM) methodology that uses only easily observable features of democracy to predict existing indices of democracy. Applying this methodology to three prominent democracy indices, we find evidence of backsliding—but beginning later and not as pronounced as suggested by some of the original indices. Our approach suggests that the Freedom House measure particularly does not track with the recent patterns in observable indicators and that there has been a stasis or—at most—a modest decline in the average level of democracy.
The spinning mule was one of the most important innovations in the rise of the British cotton industry during the Industrial Revolution. First introduced in 1780, the mule’s diffusion overturned the traditional division of labor in spinning from women to men. This article produces new insights on this process by examining the business records of Samuel Oldknow, a pioneer of fine cotton manufacturing and an early adopter of the technology during the understudied transition period of the late 1780s and early 1790s, when the machine was still hand powered before the factory system. It demonstrates that strength was the most important factor in shaping the gendered division of labor in mule spinning. Although no direct gender-pay discrimination is evident, men’s earnings were higher because of the physical effort required to operate the larger mules that more easily produced the finest yarns that secured the highest piece rates. Crucially, this shift of the gender division of labor predated factory mule spinning.
This paper will present the evidence for two newly discovered words, gawzag and shagar, meaning “two-horse chariot/mail coach” and “wagon” respectively in the eastern Arabian dialect of Qaṭrāyīth (Syriac for “in Qatari”) of the seventh and eighth centuries ce. They reveal the continued local knowledge of wheeled transport in Arabia and possible use long after its supposed disappearance in the Near East between the fourth and sixth centuries according to Richard Bulliet's well-known thesis in his seminal work The Camel and the Wheel (New York: Columbia University Press, 1990). The fact that this vernacular maintained two specific words for two different modes of wheeled transport likely suggests a practical need for them in everyday communication among the inhabitants of the Beth Qaṭraye region (Syriac for “region of the Qataris” in north-eastern Arabia). Moreover, their use in an Arabic dialect reveals that native words were developed for wheeled vehicles in the local language spoken by the inhabitants of the area well before the adoption of markabah as a neologism to mean chariot in nineteenth-century Arabic, according to Michael Macdonald's stimulating article “Wheels in a land of camels” (Arabian Archaeology and Epigraphy 20/2, 2009). Thus, the various rock drawings of two-wheeled carts and chariots in northern Arabia may in fact not only have been known but also used nearby in eastern Arabia, rather than being inaccurate representations reflecting a distant awareness of the existence of chariots elsewhere such as in Mesopotamia and Egypt as had been previously thought. This is a literary, philological. and historical study that aims at presenting newly discovered vocabulary in context for further analysis by linguists and others.
Consider the multiplication operator MB in $L^2(\mathbb{T})$, where the symbol B is a finite Blaschke product. In this article, we characterize the commutant of MB in $L^2(\mathbb{T})$. As an application of this characterization result, we explicitly determine the class of conjugations commuting with $M_{z^2}$ or making $M_{z^2}$ complex symmetric by introducing a new class of conjugations in $L^2(\mathbb{T})$. Moreover, we analyse their properties while keeping the whole Hardy space, model space and Beurling-type subspaces invariant. Furthermore, we extended our study concerning conjugations in the case of finite Blaschke products.
Various systems of mechanical devices and natural organisms use the repeated expansion and contraction of deformable structures to draw in and blow out fluid. Instead of such deformable continuous structures, a system that consists of multiple discrete bodies can also generate a directional flow through the cooperative movement of the individual bodies. In this study, we numerically investigate the collective effects of a multi-body system composed of eight circular cylinders, each of which oscillates separately in the radial direction to generate thrust. The cylinder array performs cooperative motion regulated by three motion parameters: phase difference, oscillation amplitude and frequency at a low Reynolds number ($Re = 10$). The phase difference between the cylinders is critical in determining the extent of the directional flow and the time-averaged thrust. The optimal phase difference that yields the maximum time-averaged thrust is consistent, regardless of the oscillation amplitude and frequency. However, the thrust generation performance becomes significantly weaker at a higher Reynolds number ($Re = 100$). This highlights that the hydrodynamic blockage in gaps between cylinders, which is induced by strong viscous diffusion at the low Reynolds number, is essential for the cooperative force generation of multiple closely spaced bodies. A new dimensionless geometric parameter based on the motion of the array is proposed to characterize the degree of bias in the generated flow and it successfully predicts the trend in the time-averaged thrust at the low Reynolds number with strong hydrodynamic blockage.
Direct numerical simulations are performed to study temporal variations of the wall shear stresses and flow dynamics in the turbulent pulsatile pipe flow. The mechanisms, responsible for the paradoxical phenomenon for which the amplitude of the oscillating wall shear stress in the turbulent flow is smaller than that in the laminar flow for the same pulsation conditions, are investigated. It is shown that the delayed response of turbulence in the buffer layer generates a large magnitude of the radial gradient of the Reynolds shear stress near the wall, which counteracts the effect of the oscillating pressure gradient on the change of the streamwise velocity and hence reduces the amplitude of the wall shear stress. Such a delayed response consists of two processes: the delayed development of near-wall streaks and the subsequent energy redistribution from the streamwise velocity fluctuation to the other two co-existing components. This is a dynamical manifestation of the viscoelasticity of turbulent eddies. As the frequency is reduced, the variation of the friction Reynolds number results in a phase-wise variation of the time scale and intensity of the turbulence response, causing the hysteresis of the wall shear stress. Such a phase asymmetry is amplified by the increase of the pulsation amplitude. An examination of the energy spectra reveals that the near-wall streaks are stretched in the streamwise direction during the acceleration phase, and then break up into small-scale structures in the deceleration phase, accompanied by the enhanced dissipation that transforms the turbulent kinetic energy into heat.