Professionalism in science

In everyday speech, the word “professional” has an ambiguous ring, applied to one who follows, by way of profession, what is ordinarily regarded as a pastime (e.g., a sport), or disparagingly applied to one who “makes a trade” of politics and the like. In this sense it is contrasted with “amateur”, one who does something, literally, for the love of it, without remuneration. The latter is generally regarded as superior to the former; remuneration being considered as likely to irremeably invest the activity with self-interest, resulting in the task at hand being merely accomplished with the minimally sufficient expertise and skill to obtain the offered remuneration, whereas the amateur strives to do whatever task is at hand as well as he or she possibly can, “ excellence for its own sake”

The regulation of scientific work

Government research councils, national science foundations and the like have become ubiquitous. The first one seems to have been the US National Science Foundation (NSF), created in 1950; the similarly named organization with an equivalent function in Switzerland was established in 1952; the UK Science Research Council was formed in 1965; and so forth. The mode of operation of these organizations was to issue “calls for proposals” (i.e., general invitations to scientists to submit project proposals) and then disburse funds according to an assessment of proposals received. The main effect seems to have been a general stifling of innovative ideas, since the final decisions whether to fund a given project are made by a committee, which, almost axiomatically, favours the most conservative ideas

Quantification of the number of adsorbed bacteria on an optical waveguide

A simple method is presented for determining the number of bacteria adsorbed on a planar optical waveguide from measurements of a single effective refractive index. It requires only knowledge of the shape and mean size of the bacteria

Exact density-functional potentials for time-dependent quasiparticles

We calculate the exact Kohn-Sham potential that describes, within time-dependent density-functional theory, the propagation of an electron quasiparticle wavepacket of non-zero crystal momentum added to a ground-state model semiconductor. The potential is observed to have a highly nonlocal functional dependence on the charge density, in both space and time, giving rise to features entirely lacking in local or adiabatic approximations. The dependence of the non-equilibrium part of the Kohn-Sham electric field on the local current and charge density is identified as a key element of the correct Kohn-Sham functional.Comment: 4 pages, 3 figure

Ergonomic Chair Design by Fusing Qualitative and Quantitative Criteria using Interactive Genetic Algorithms

This paper emphasizes the necessity of formally bringing qualitative and quantitative criteria of ergonomic design together, and provides a novel complementary design framework with this aim. Within this framework, different design criteria are viewed as optimization objectives; and design solutions are iteratively improved through the cooperative efforts of computer and user. The framework is rooted in multi-objective optimization, genetic algorithms and interactive user evaluation. Three different algorithms based on the framework are developed, and tested with an ergonomic chair design problem. The parallel and multi-objective approaches show promising results in fitness convergence, design diversity and user satisfaction metrics

Experimental methods for investigating protein adsorption kinetics at surfaces

The adsorption of proteins at the solid-liquid interface is a process of fundamental importance in nature. Extensive reviews (MacRitchie, 1978; Andrade & Hlady, 1986; Norde, 1986) testify to the strong interest which has been shown in the problem during the past few decades. Norde & Lyklema (1978) have rightly pointed out that protein adsorption is scientifically intriguing; the phenomenology is complicated and includes many presently apparently irreconcilable observation