Search results

Filter

Filetype

Your search for "*" yielded 534488 hits

Skeuomorphism in digital archaeological practice : A barrier to progress, or a vital cog in the wheels of change?

Drawing upon the author’s combined experiences of developing digital field workflows at the sites of Çatalhöyük in Turkey and Kämpinge in Sweden, this paper will discuss the role of skeuomorphism within the context of digital archaeological practice, and specifically, it will focus upon the ways that the use of digital technology affects the epistemological processes associated with fieldwork. In

Tail unsaturation tailors the thermodynamics and rheology of a self-assembled sugar-based surfactant

Hypothesis: The self-assembly of long-tail surfactants results in the formation of nanoscale structures, e.g. worm-like micelles, with the ability to modify the rheology of the system. However, micelle formation, and thus the alteration of the rheology, is subject to the high Krafft temperature of saturated long-tail surfactants. Hexadecylmaltosides are sustainable surfactants that, in solution, f

Tailoring the self-assembly, interfacial properties and rheological behaviour of sugar-based surfactants

Surfactants are important ingredients in many formulated products used in everyday life. Many of these surfactants originates from fossil-based materials and degrades slowly in aquatic systems. As society strives towards having a smaller environmental footprint, surfactants that are non-toxic, biodegradable and can be synthesized from renewable raw materials need to be developed. To this end sugar

Identifying ecologically unequal exchange in the world-system : Implications for development

This chapter presents the theory of ecologically unequal exchange (EUE). The theory explains asymmetric transfers of non-monetary, biophysical resources and environmental harms between different countries or regions. The chapter provides a cursory review of the literature on methods for empirically identifying such asymmetries and testing hypotheses derived from the theory. To identify EUE require

Minimum Power Losses Based Optimal Power Flow for Iraqi National Super Grid (INSG) and its Effect on Transient Stability

In the present work Optimal Power Flow (OPF) with minimum net work losses for Iraqi National Super Grid (400kv) INSG which consist of 19 load buses and 6 generating buses was studied. The losses were calculated and compared with that in case of ordinary load flow which is equal to 37592 MW according to data of generation and load on 2/1/2003.Mathematical model using Lagrange method programmed in M

A Permissioned Blockchain-based System for Collaborative Drug Discovery

Research and development of novel molecular compounds in the pharmaceutical industry can be highly costly. Lack of confidentiality can prevent a product from being patented or commercialized. As an effect, cross-organizational collaboration is virtually non-existent. In this paper, we introduce a blockchain-based solution to the collaborative drug discovery problem so that participants can maintai

A Decentralized Dynamic PKI based on Blockchain

The central role of the certificate authority (CA) in traditional public key infrastructure (PKI) makes it fragile and prone to compromises and operational failures. Maintaining CAs and revocation lists is demanding especially in loosely-connected and large systems. Log-based PKIs have been proposed as a remedy but they do not solve the problem effectively. We provide a general model and a solutio

Contextualizing agency in new path development : how system selectivity shapes regional reconfiguration capacity

This paper examines factors shaping the reconfiguration capacity of regional innovation systems (RISs). ‘System selectivity’ is introduced as a concept to understand how factors such as regional imaginaries, power relations and directionality shape how RIS reconfiguration plays out. A comparative case study illustrates the conceptual arguments, investigating industrial change in two Swedish region

Using ecological context to interpret spatiotemporal variation in natural selection

Spatiotemporal variation in natural selection is expected, but difficult to estimate. Pollinator-mediated selection on floral traits provides a good system for understanding and linking variation in selection to differences in ecological context. We studied pollinator-mediated selection in five populations of Dalechampia scandens (Euphorbiaceae) in Costa Rica and Mexico. Using a nonlinear path-ana