Search results

This study investigates cross-border commercial air passenger traffic in Africa, focusing on the development of the 15 busiest country pairs during the period 1989 to 2015. It explores dimensions not previously studied by using ICAO’s ‘Traffic by Flight Stage’ (TFS) and data from the CEPII Gravity Dataset. The spatial results show on an uneven geographical distribution of country pairs with the ce

We extend a theorem of Ladkani concerning derived equivalences between upper-triangular matrix rings to ring spectra. Our result also extends an analogous theorem of Maycock for differential graded algebras. We illustrate the main result with certain canonical equivalences determined by a smooth or proper ring spectrum.

The complexity of the geometric and electronic structure of boron allotropes is associated with the multicentric bonding character and the consequent B polymorphism. When growth is limited to two-dimensions (2D), the structural and electronic confinement yields the borophenes family, where the interaction with the templating substrate actually determines the stability of inequivalent boron phases.

When does technological change lead to inclusive prosperity? Research suggests that shared benefits from technological progress require concurrent expansions in education and support from pro-labor institutions. We contribute to the debate by studying electricity adoption in Sweden during the first decades of the 20th century. Exploiting that proximity to hydro-power plants shaped the electricity

When new general-purpose technologies like AI emerge, both techno-optimists and techno-pessimists predict that inequality will increase among the labour force. This column studies the rapid introduction of electricity in early 20th century Sweden and its effect on workers. The transformative technology benefitted those at the bottom of the income distribution, resulting in higher incomes, lower in

Based on our previous study, we evaluated the modulatory effects on LPS-induced IL-1β and IL-10 cytokine production in RAW 264.7 macrophages of several medicinal herbs, including P. scandens. The results showed that P. scandens extract showed significant effects on LPS-induced IL-1β and IL-10 cytokine production in RAW 264.7 macrophages. Therefore, in the current research, we focused on the P. sca

Conservation and consistency are fundamental properties of discretizations of conservation laws, necessary to ensure physically meaningful solutions. In the context of systems of nonlinear hyperbolic conservation laws, conservation and consistency additionally play an important role in convergence theory via the Lax-Wendroff theorem. Here, these concepts are extended to the realm of iterative meth

BackgroundThe geometrical relationship between atrial and ventricular short‐axis cross‐sectional area determines the hydraulic forces acting on intracardiac blood. This is important for diastolic filling. In patients undergoing heart transplantation (HTx), the left atrium is often enlarged as a result of the standard surgical technique. We hypothesized that diastolic filling in HTx patients is aff

In this study, the partitioning of minerals in ultrafiltration (UF) streams of skim milk using cross-flow (CF-UF) and dead-end (DE-UF) was investigated using 50 kDa membrane at different temperatures (5, 10, 25, 35, 55°C). CF-UF showed higher protein retention (6.02–10.9%) compared with DE-UF (3.44–4.70%), along with more retention of calcium, with values ranging from 29.8 to 41.5 and 57.8 to 112

Purpose: The postponement principle concerns defining when and where value is added, usually referring to hardware components for physical products. However, in modern supply chains, software’s importance is increasing, impacting the timing and location of value-adding operations. Lacking insights into software-driven implications for postponement, we aim at elaborating on the postponement princip

Lipid-based drug delivery systems offer the potential to enhance bioavailability, reduce dosing frequency, and improve patient adherence. In aqueous environment, initially dry lipid depots take up water and form liquid crystalline phases. Variation of lipid composition, depot size and hydration-induced phase transitions will plausibly affect the diffusion in and out of the depot. Lipid depots of s

The social sciences have many different understandings of ‘normative power’, but in European Union (EU) studies normative power has three particular meanings. The first meaning of normative power is its emphasis on normative theory, that is, how we judge and justify truth claims in social science. The second meaning of normative power is as a form of power that is ideational rather than material o

Abstract in SpanishEn este artículo se propone un acercamiento didáctico a la enseñanza del Pretérito Perfecto Compuesto (PPC) en contextos de español como lengua extranjera. Se analizan algunos problemas de la visión tradicional sobre el tema y se plantea que el concepto de referencia genérica propuesto en Henderson (2010) da una respuesta más coherente a usos que la bibliografía suele adjudicar This article proposes a didactic approach to teaching the compound past tense that is known in English as “Present Perfect” (PPC for its initials in Spanish) in contexts of Spanish as a Foreign Language. It analyses some issues concerning the traditional view on the subject and suggests that the concept of generic reference proposed by Henderson (2010) provides a more coherent explanation for some

The idea of being civilian, military, and civilizing at the same time is undoubtedly very seductive to the armies of academics now writing on EU military force. It is tempting to think that the EU can have-its-cake-and-eat-it-too in militarizing its normative power. In contrast, in my reconsideration of normative power Europe I suggest that militarization of the EU need not necessarily lead to the

This paper presents an analysis of how library professionals in Sweden and Denmark perceive the democratic role of the library profession in the polarised political landscape of today. Relating to research on the democratic role of libraries, professional ethics and cultural policies, empirical data was gathered through seven group interviews with library professionals from eleven local libraries

The use of material extrusion (MEX) has increased rapidly due to the affordability of 3D printers. This has led to a growing demand for improved print quality, high fidelity, strength, or fast print times. In this study, a non-planar approach for better surface quality is investigated. The hardware of a 3-axis MEX printer was developed together with testing new software for non-planar slicing. The

BACKGROUND: Continuity of care is important for patients with chronic conditions. Assigning patients to a named GP may increase continuity.AIM: To examine if patients who were registered with a named GP at the onset of their first chronic disease had higher continuity at subsequent visits than patients who were only registered at a practice.DESIGN & SETTING: Registry-based observational study