Newtons experimentum crucis hat ein komplementares Gegenstück, d.h. ein Experiment, in dem die Rollen von Licht und Schatten genau ausgetauscht sind. Statt wie Newton in der Dunkelkammer zu experimentieren, müssen wir das Komplement des experimentum crucis in einer Streulichtkammer aufbauen (deren Wände sog. Lambertstrahler sind). Wenn es dieses umgestülpte Experiment wirklich gibt, dann liefert es für jeden newtonischen Beweis einen umgestülpten Gegenbeweis, dessen Konklusion die Heterogenitat der Schatten wäre (also die Behauptung, dass nicht weißes Licht, sondern schwarze Schatten eine heterogene (...) Mischung verschiedenfarbiger Strahlen mit unterschiedlichen Brechungseigenschaften seien). Dass Newtons experimentum crucis in diesem Sinne umgestülpt werden kann, wird von Newtons eigener Theorie impliziert. Mehr noch, inzwischen ist der empirische Nachweis der Umstülpung gelungen. (shrink)

In recent years, inverse spectra were investigated with imaging optics and a quantitative description with radiometric units was suggested. It could be shown that inverse spectra complement each other additively to a constant intensity level. Since optical intensity in radiometric units is a power area density, it can be expected that energy densities of inverse spectra also fulfill an inversion equation and complement each other. In this contribution we report findings on a measurement of the power area density of inverse (...) spectra for the near ultraviolet, visible and the infrared spectral range. They show the existence of corresponding spectral regions ultra-yellow and infra-cyan in the inverted spectrum and thereby present additional experimental evidence for equivalence of inverse spectra beyond the visible range. (shrink)

In this article we (a) interlink the philosophical ideas of Ernst Schumacher and Karl Popper within the framework of planning and management, (b) describe project management cases implemented using the principles of project cycle management (PCM) and (c) study whether the success or failure can be attributed to following these concepts. We consider two basic concepts for perceiving the world surrounding us: the concept of organisation and that of self-organisation. The former emphasises the predictability of the future, where the results (...) of each activity are predetermined and can always be achieved through thorough analytical planning. The latter sees the world as a generic whole where numerous interactions take place simultaneously, leaving the future unknown. As it has been shown, for example, by Schumacher, Hayek and Popper, the real world is uncertain and orders of great complexity appear spontaneously in a self-organised manner. Mankind has thus to cope with the self-organising world and to plan and manage therein. PCM is one of the most widespread contemporary management techniques used for that purpose in both the private and public sectors. However, PCM lacks a proper theoretical basis as well as philosophical framework. We have proposed elsewhere that the concept of piecemeal social engineering elaborated by Popper in his The Poverty of Historicism could serve as a theoretical basis, which can combine the organisational nature of planning and the self-organising and fuzzy world. Thus the task is mentally to split the planning and implementation issue: to take the whole into pieces and rearrange them in a desired manner in the planning phase (concept of organisation; convergent problem solving). The actual implementation of the plan ought to be conducted following a stepwise approach, re-planning all through the process (concept of self-organisation; divergent problem solving). “The future cannot be forecast, but it can be explored.” Not all human actions are unpredictable, but we cannot be sure what the results would be or judge the value of an action based on its inclusion in some plan. (shrink)