The ability of ordinary differential equations (ODEs) to simulate discrete machines with a universal computing power indicates a new source of difficulties for event detection problems. Indeed, nearly any kind of event detection is algorithmi- cally undecidable for infinite or finite half-open time intervals, and explicitly given “well-behaved” ODEs (see [18]). Practical event detection, however, usually takes place on finite closed time intervals. In this paper the undecidability of general event detection is extended to such intervals. On the other hand, (...) on finite closed time in- tervals event detection in a certain approximate sense is quite generally decidable, which partly saves the case for practicable event detection. The capability of simulat- ing universal Turing machines is still there, and is used to give complexity lower bounds in terms of accuracy of event detection. The ODEs used here are of course quite complicated, but not artificial, in that even from the point of view of practical event detection it would appear difficult to find criteria to exclude them. (shrink)

(1993). Paths of corporate change and the metaphor of ‘sectoral roots’: The case of finnish corporations, 1973–1985. World Futures: Vol. 37, The Evolution of Socio-Economic Systems, pp. 111-127.

The managerial form of university governance has changed the conditions of academic work in many countries. While some academics consider this a welcome development, others experience it as a threat to their autonomy and to the meaningfulness of their work. This essay suggests a stance in response to the current conditions that should serve especially the latter group of academics. The claim is that by approaching academic work as a potential praxis in emergence, it is possible to appreciate local, autonomous (...) activity in renewing academic work. Even if such efforts remain difficult, dispersed in space, discontinuous in time, and incomplete, they may provide a sense of direction and keep up hope. The conception of praxis is a way of articulating the mission of such efforts; simultaneously, it is also a way of defining an epistemic object for research on academic work. (shrink)

This short theoretical and argumentative essay contributes to the ongoing deliberation about the so-called digitalfug sovereignty, as pursued particularly in the European Union. Drawing from classical political science literature, the essay approaches the debate through paradoxes that arise from applying classical notions of sovereignty to the digital domain. With these paradoxes and a focus on the Peace of Westphalia in 1648, the essay develops a viewpoint distinct from the conventional territorial notion of sovereignty. Accordingly, the lesson from Westphalia has more (...) to do with the capacity of a state to govern. It is also this capacity that is argued to enable the sovereignty of individuals within the digital realm. With this viewpoint, the essay further advances another, broader, and more pressing debate on politics and democracy in the digital era. (shrink)

Mismatch brain responses to unpredicted rare stimuli are suggested to be a neural indicator of prediction error, but this has rarely been studied in the somatosensory modality. Here, we investigated how the brain responds to unpredictable and predictable rare events. Magnetoencephalography responses were measured in adults frequently presented with somatosensory stimuli that were occasionally replaced by two consecutively presented rare stimuli [unpredictable rare stimulus and predictable rare stimulus ; p = 0.1 for each]. The FRE and PR were electrical stimulations (...) administered to either the little finger or the forefinger in a counterbalanced manner between the two conditions. The UR was a simultaneous electrical stimulation to both the forefinger and the little finger. The grand-averaged responses were characterized by two main components: one at 30–100 ms and the other at 130–230 ms latency. Source-level analysis was conducted for the primary somatosensory cortex and the secondary somatosensory cortex. The M55 responses were larger for the UR and PR than for the FRE in both the SI and the SII areas and were larger for the UR than for the PR. For M150, both investigated areas showed increased activity for the UR and the PR compared to the FRE. Interestingly, although the UR was larger in stimulus energy and had a larger prediction error potential than the PR, the M150 responses to these two rare stimuli did not differ in source strength in either the SI or the SII area. The results suggest that M55, but not M150, can possibly be associated with prediction error signals. These findings highlight the need for disentangling prediction error and rareness-related effects in future studies investigating prediction error signals. (shrink)

박치우는 식민지 조선의 철학자들이 수행했던 역사에 대한 철학적 사유의 특징을 가장 분명하게 보여준다. 이를 위해 본 연구는 박치우의 역사철학적 사유 내에서 핵심적인 위상을 차지하는 개념을 포착하고, 그것을 중심으로 박치우 역사철학의 변화 양상을 드러내고자 했다. 특히 박치우에게 ‘운명’ 개념은 역사, 사회, 인간을 아우르는 박치우의 철학적 관점 전체를 유기적으로 통합시키고 나아가 그의 이론과 실천을 적확하게 이해할 수 있도록 하는 실마리가 된다. 무엇보다 ‘운명’ 개념은 식민지의 구체적인 모순에 대한 주체적인 경험, 식민지 모순의 극복을 자신의 역사적 책무로 자각하는 역사철학적 사유, 나아가 식민극복을 위한 역사적 (...) 실천 등을 포괄하는 전체과정의 개념화라고 할 수 있다. 이러한 운명 개념의 명확한 설명과 함께 본 연구는 그가 말한 파시즘적 ‘숙명’ 개념 및 운명의 실행적 계기이자 숙명 개념에 대항하는 ‘사명’ 개념을 동시에 연계하여 비교하면서 박치우 역사철학의 독특성을 드러내고자 했다. (shrink)