Articles by Sorin Hermon
Formally defining the time-space-archaeological culture relation: problems and prospects
Sorin Hermon, Franco Niccolucci
Abstract
Locating archaeological cultures in time and space is a major challenge of archaeolog-ical research. Despite more than a century of scientific research in archaeology, a satisfactory solution has yet to be proposed. Past attempts to look into the problem focused on sharpening the definition of types of material culture artefacts, a more accurate chronological dating of such objects, various probabilistic methods or GIS solution for defining the time-space borders of archaeological cultures. However, the proposed approaches did not fully consider how the nature of archaeological cultures and their consequent dating and geographic positioning play a crucial role in assigning spatio-temporal borders. We propose to shift the operating logical paradigm in archaeology, from a crisp, Aristotelian-based logic, to fuzzy logic, in our opinion more suitable for reasoning in archaeology. We also introduce the rough sets theory to deal with chronological and geographic positioning of archaeological cultures. Both concepts have, in our opinion, substantial advantages over the traditional algebra and logic rules (implicitly) applied so far.
«Archeologia e Calcolatori» 2017, 28.1, 93-108; doi: 10.19282/AC.28.1.2017.06
Uno strumento webGIS per lo studio e l'analisi dei percorsi spazio-temporali del patrimonio culturale di Cipro
Valentina Vassallo, Niki Kyriacou, Sorin Hermon, Ioannis Eliades
Abstract
The Byzantine Museum of the Archbishop Makarios III Foundation in Nicosia (Cyprus) hosts numerous artefacts, dating from the 6th to the 20th centuries A.D. Some were looted from the Turkish-occupied areas of the island and have recently been repatriated. A webGIS tool under development, stores information regarding these artefacts and their spatial and temporal characteristics. The user can navigate through the history of the artefacts and have different views of the area. The GIS structure is based on micro geographical scale and it will be expanded to macro. In the micro scale the artefacts originally located within the city walls of Nicosia have been mapped. The macro scale project will cover Cyprus and other countries, where the artworks were initially located and to which they ‘travelled’. The aim is to visualize the spatial and temporal movement of the artefacts and retrieve some statistical data regarding their original provenance and the places where they were located after being illegally exported. The users can visualize information through the artefacts metadata documentation.
La logica fuzzy e le sue applicazioni alla ricerca archeologica
Sorin Hermon, Franco Niccolucci
Abstract
This paper deals with the application of fuzzy logic to archaeological research. Fuzzy logic is based on a continuum of truth values ranging from 0 (False) to 1 (True) and thus may help whenever there exists some uncertainty on data assignment to predetermined categories. After examining the features and drawbacks of typological classification and the problem of gender and age assignment in cemetery excavations, the fundamentals of fuzzy logic are summarized. Four examples of archaeological applications are then presented. The first example deals with a necropolis in which tombs present a high degree of uncertainty as far as sex and age of the deceased are concerned. Therefore it is suggested to use a fuzzy database management system, i.e. a DBMS implementing fuzzy logic and function, for data storage and processing. Such a database software was previously developed for this application. In the following three examples, classification problems are considered and it is shown how the use of fuzzy logic may change their archaeological interpretation. The authors claim that a generalized use of fuzzy logic, as is widely applied in other sciences, may improve the quality of data processing and above all produce reliable and transparent results, or at least illustrate the degree of reliability the researcher grants to those data.
«Archeologia e Calcolatori» 2003, 14, 97-110; doi: 10.19282/ac.14.2003.04
Estimating subjectivity of typologists and typological classification with fuzzy logic logic
Sorin Hermon, Franco Niccolucci
Abstract
It is well known that interpretation always conveys a certain degree of subjectivity, which disappears as soon as interpreted data are stored in a computer database. This may lead to dangerous approximation and possibly to fallacious conclusions. To avoid this oversimplification, it has been suggested to use fuzzy databases, in which attributes may have a fuzzy nature and be indexed by a numerical coefficient, the fuzzy coefficient, which can be interpreted as the degree of confidence the researcher has in each possible assigned value. This technique has been successfully applied to gender and age assignment for the deceased in a cemetery investigation: in this case anthropological data offered statistical parameters that could be used to compute the fuzzy coefficient. Lithics classification is another field in which fuzzy databases have a potential usefulness, but in this case, no previous statistics may help in determining the fuzzy coefficient. We decided to perform an experiment during a standard typological classification of a flint tool assemblage from Israel. It concerned the classification of 50 tools, by different researchers. Each one was asked to note, besides the typology of each item, an evaluation of the 'degree of sureness', or the 'possibility' of an item to belong to a particular type, in other words his or her guessed estimate of the fuzzy coefficient. This paper reports the results of this experiment, in order to evaluate the difference between researchers when performing a classification of tools, to recognize problematic types or items (which mostly differed between the typological lists presented) and eventually to compute a fuzzy coefficient for each type assignment, balancing the different evaluations of experts.
«Archeologia e Calcolatori» 2002, 13, 217-232; doi: 10.19282/ac.13.2002.16
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