Search results

A theoretical model has been developed that describes ultrafiltration of nonionic surfactants. The model takes into account the fact that surfactants start to aggregate and form micelles at the critical micelle concentration, The model can be used to predict the performance of the membrane if the transport properties inside and at the membrane surface as well as the surfactant association behavior

An airfreight container with automated instruments for measurement of atmospheric gases and trace compounds was operated on a monthly basis onboard a Boeing 767-300 ER of LTU International Airways during long-distance flights from 1997 to 2002 (CARIBIC, Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container, http://www.caribic-atmospheric.com). Subsequently a m

The wavelength is an important quantity in a number of ocean-engineering applications, e.g. for design of structures that have dimensions of the same order of magnitude as the wavelength. Most often however, the description of the wave climate is given by a spectrum. We present a methodology based on a representation of a sea state in the frequency domain which returns the joint distribution of cr

The survivable network design problem is a classical problem in combinatorial optimization of constructing a minimum-cost subgraph satisfying predetermined connectivity requirements. In this paper we consider its geometric version in which the input is a complete Euclidean graph. We assume that each vertex v has been assigned a connectivity requirement r(upsilon).. The output subgraph is supposed

Many children with adverse reactions to beta-lactams are labelled as allergic without performing an allergy study to confirm it. In this retrospective study of 10 years, we have detected only 3.3% positive cases. Although International Guidelines recommend a second allergy work-up in patients with a negative study, we found from our results a low profitability of retesting.

During the past years Enterprise 2.0 has become widely spread among organization. However is there not enough awareness in the organizations concerning the necessary organizational changes which companies need to address when planning for the shift to Enterprise 2.0. In this study we aim to indentify solutions for success which affect if an Enterprise 2.0 implementation will succeed or not and how

Purpose: To investigate how consumers understand free services on the Internet. Theories: The research is primarily based upon theories of gift giving. Methodology and analysis: The Internet is not a tangible marketplace and in order to understand the value of the free services online, we used consumers' behavioral accounts to explain how they perceive the free services that are common online.

This paper aims to contribute to the discussion of the nature of the self-help housing market by analysing its extent and mode of operation in four self-help settlements in the intermediate sized city of Perdra, Colombia. The evidence from the survey settlements suggests that the market for self-help houses is small. Self-help settlements are dominated by a land market rather than by a housing mar

Measuring the number concentration of colloidal nanoparticles (NPs) is critical for assessing reproducibility, enabling compliance with regulation, and performing risk assessments of NP-enabled products. For nanomedicines, their number concentration directly relates to their dose. However, the lack of relevant reference materials and established traceable measurement approaches make the validation

Background:Support, Monitoring, and Reminder Technology for Mild Dementia (SMART4MD), a customized tablet app, was developed to improve or maintain the quality of life of people with mild cognitive impairment (MCI) and their informal caregivers.Objective:This study conducts an 18-month economic evaluation of the SMART4MD app, in addition to standard care, compared with standard care alone in Swede

The Internet is a large used technology and seniors, like everyone else, want to take part in the experience of navigate the Web. Many guidelines about how to develop usable web pages exist, but not many of them are focused on seniors. This paper aims to issue guidelines for developing web pages intended to be used by seniors, based upon the results of the observations of seniors and younger adult

This thesis is about returns to schooling for Mexican immigrants to the United States. The United States became the home of many immigrants. There is an evidence that large amount of immigrants in USA are from Mexico. They are among both oldest and newest inhabitants of the nation. Mexican immigrants and their descendants now make-up a significant portion of the US population and have become one o

It is well-known that the classical Poisson kernel for the unit disc $\D$ in the complex plane is naturally associated to the Laplacian. In a recent paper Duman has shown that Poisson integrals with respect to the kernel $$ K_2(z)=\frac{1}{2}\frac{(1-\lvert z\rvert^2)^3}{\lvert 1-z\rvert^4}, \quad z\in\D, $$ solve the Dirichlet problem for the unit disc for a certain second order differential oper

The Naqshbandi-Haqqani Sufi order has spread throughout the world extensively since it was founded in 1973 by its Sheikh Muhammad Nazim Adil al-Haqqani. The present thesis analyses one local branch of that order in Eastern London within a theoretical framework of New Social Movements, as formulated by the Italian sociologist Alberto Melucci. A general picture of Muslim presence in Britain is given

The aim of this thesis is to identify the key factors that affect the biomass potential for energy purposes in the EU-15 in the short term (2010) and in the long term (2050) and to examine the extent to which these factors are taken into consideration in recent European biomass potential studies. In the short term, the production and use of energy carriers based on renewable energy sources (RES) n