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Regenerative ability varies tremendously across species. A common feature of regeneration of appendages such as limbs, fins, antlers, and tails is the formation of a blastema--a transient structure that houses a pool of progenitor cells that regenerate the missing tissue. We have identified the expression of von Willebrand Factor D and EGF Domains (vwde) as a common feature of blastemas capable of
AbstractThe sociocultural theory, the idea that we learn in interaction with others, has had an immense impact on the field of education. For the past 20 years, the theory has gained momentum within the field of online education and inspired a group of researchers at the University of Alberta (Garrison, Anderson & Archer 2000) to design a conceptual framework and an online learning model of th
The road to a Nobel Prize is usually long and winding. This article tracks theroad to Robert Fogel’s and Douglass North’s shared prize in economics in 1993through Lennart Jörberg’s correspondence from 1965 to 1989. Jörberg, for almosttwenty years professor and head of the Department of Economic History at LundUniversity, had during two year-long visits in the United States in the 1950s and1960s de
While a naive algorithm for multiplying two 2 × 2 matrices requires eight multiplications and four additions, Strassen showed how to compute the same matrix product using seven multiplications and 18 additions. Winograd reduced the number of additions to 15, which was assumed to be optimal. However, by introducing a change of basis, Karstadt and Schwartz showed how to lower the number of additions
Introduction. In this article we explore how findings from existing research on time, temporality and migration can be relevant to social work practice and inform social workers’ interaction with migrating individuals. In social work literature, time mainly appear as part of the procedural knowledge as organizationally decided time frames and deadlines for work which is sometimes interna
BackgroundAntibiotics are handled in large amounts at hospitals at many different wards due to the wide range of bacterial infections that are treated. Unnecessary use and occupational exposure to antibiotics should be avoided due to the risk of bacterial resistance development and adverse health effects including skin and respiratory hypersensitivity reactions in persons handling these drugs.Obje
To evaluate the behaviour of a single timber-concrete composite (TCC) T-beam, a simplified 2D finite element (FE) model in Abaqus is developed and validated using experimental tests and the Gamma method given in Annex B of EN 1995–1-1. The shear connection used in the beam consist of perfobond connectors, which are adhesively bonded to the timber beam. In the developed model, beam and shell finite
In timber-concrete composites (TCC), more researchers are trying to find the “ultimate” shear connector, which combines multiple advantages. Bonded steel plates are one of the possible solutions. This paper provides an analytical and a numerical approach, calibrated with previously conducted experiments, to predict the load carrying capacity, and corresponding governing failure mode, of perfobond
With the need of renovation in the current timber structures, use of a cement based layer is a popular solution, which improves the structural integrity and increases the structural mass. In this paper, the use of a lightweight concrete with dowel type connections is investigated since such a combination can serve for both new and existing structures. Two types of dowel connections are experimenta
In this paper, perforated shear connectors (perfobond), used extensively in steel-concrete composite (SCC) beams, are implemented in timber-concrete composite beams (TCC) and experimentally investigated. In contrast to its original use, the perfobond connector is connected with an adhesive to the timber beam while welded in the SCC solution. On the concrete slab side, connection is achieved using
In this paper, the use of low strength lightweight concrete in combination with glue-laminated timber (TLCC) is studied. Six series of push-out tests were conducted to assess the mechanical performance of the screw shear connection between these materials with a perpendicular and inclined (shearcompression)configuration with various screw diameters and lengths. The tests show that though low stren
Cu nanoparticles are widely used in different fields. Controlling the Cu oxidation state and the local strain is fundamental for optimizing its efficiency in processes, such as catalytic reactions. In this work, Cu nanoparticles were synthesized by using glucose as a reducing agent. Different synthesis conditions led to nanoparticles with a tunable local strain and Cu(0)/Cu 2O ratio. The amounts
In this paper we suggest that attention to the social practice of prepping, with its particular focus on how people navigate uncertain and potentially disastrous futures, can help broaden our understanding of forced migration. We argue that the emerging literature on doomsday prepping provides a particularly interesting vantage point from which to study the relationship between forced migration, t
In the African Great Lakes region, Hutu and Tutsi for the most part live peacefully side by side, while at times they have committed genocide and other atrocities in the name of ethnicity. On the one hand, ethnicity is strong enough to mobilize hundreds of thousands of ordinary Hutu peasants in Rwanda to kill, maim, and molest their Tutsi neighbors and to have the Tutsi-dominated army in Burundi s
The aim of this special issue of JEMS is to explore the inherent contradictions and tensions of transnational engagement and reveal how these are played out at different levels, intersecting with other social markers based on gender, class, ethnicity, etc. While transnational engagements span territories and transcend spatial fixation, they might also provide stabilised identities for those involv
