African history and world history each became substantial fields of historical study in the aftermath of the Second World War. African history organized rapidly in the 1950s and 1960s, an era dominated by modernization-thinking. World history developed slowly until the 1990s, then quickly expanded and generated institutional homes in a time of globalization-thinking. This piece considers issues...

The historical development of Hensel’s lemma is briefly discussed (section 1). Using Newton polygons, a simple proof of a general Hensel’s lemma for separable polynomials over Henselian fields is given (section 3). For polynomials over algebraically closed, valued fields, best possible results on continuity of roots (section 4) and continuity of factors (section 6) are demonstrated. Using this ...

Perhaps a greater challenge than keeping the walls porous between disciplines is to ensure that the very specialized work done within fields retains its integrity when involved in collaborative efforts. Keeping this in mind, Academy and the Internet is a commendable collection that should be read as a critique, used as a reference, and viewed as coming as close to the ‘unreachable’ conceptual p...

This paper presents a novel approach for pattern extraction and anomaly detection in maritime vessel traffic, based on the theory of potential fields. Potential fields are used to represent and model normal, i.e. correct, behaviour in maritime transportation, observed in historical vessel tracks. The recorded paths of each maritime vessel generate potentials based on metrics such as geographica...

Semantic change and concept drift are studied in many different academic fields. Different domains have different understandings of what a concept and, thus, concept drift is making it harder for researchers to build upon work in other disciplines. In this paper, we aim to address this challenge and propose definitions for these phenomena which apply across fields. We provide formal definitions...

Understanding shapes has been a challenging issue for many years, firstly motivated by computer vision and more recently by many complex applications in diverse fields, such as medical imaging, animation, or product modeling. Moreover, the results achieved so far prompted a significant amount of work in very innovative research fields such as semantic-based knowledge systems dealing with multi-...

Atmospheric pressure photoionization (APPI) is the last arrival in the family of atmospheric pressure ionization (API) methods to couple mass spectrometry (MS) to liquid-phase separation techniques. The basic idea was to further extend the fields of application of liquid chromatography (LC)-MS to those molecules that are not, or are poorly amenable, to electrospray (ESI) or APCI. The present re...